diff options
216 files changed, 5664 insertions, 4353 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 9b583dd0298b..083ac2d63eef 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -580,3 +580,33 @@ Date: January 2022 Contact: "Jaegeuk Kim" <[email protected]> Description: Controls max # of node block writes to be used for roll forward recovery. This can limit the roll forward recovery time. + +What: /sys/fs/f2fs/<disk>/unusable_blocks_per_sec +Date: June 2022 +Contact: "Jaegeuk Kim" <[email protected]> +Description: Shows the number of unusable blocks in a section which was defined by + the zone capacity reported by underlying zoned device. + +What: /sys/fs/f2fs/<disk>/current_atomic_write +Date: July 2022 +Contact: "Daeho Jeong" <[email protected]> +Description: Show the total current atomic write block count, which is not committed yet. + This is a read-only entry. + +What: /sys/fs/f2fs/<disk>/peak_atomic_write +Date: July 2022 +Contact: "Daeho Jeong" <[email protected]> +Description: Show the peak value of total current atomic write block count after boot. + If you write "0" here, you can initialize to "0". + +What: /sys/fs/f2fs/<disk>/committed_atomic_block +Date: July 2022 +Contact: "Daeho Jeong" <[email protected]> +Description: Show the accumulated total committed atomic write block count after boot. + If you write "0" here, you can initialize to "0". + +What: /sys/fs/f2fs/<disk>/revoked_atomic_block +Date: July 2022 +Contact: "Daeho Jeong" <[email protected]> +Description: Show the accumulated total revoked atomic write block count after boot. + If you write "0" here, you can initialize to "0". diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index bab2b0bf5988..54a9756f2dad 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1158,8 +1158,12 @@ nopku [X86] Disable Memory Protection Keys CPU feature found in some Intel CPUs. - <module>.async_probe [KNL] - Enable asynchronous probe on this module. + <module>.async_probe[=<bool>] [KNL] + If no <bool> value is specified or if the value + specified is not a valid <bool>, enable asynchronous + probe on this module. Otherwise, enable/disable + asynchronous probe on this module as indicated by the + <bool> value. See also: module.async_probe early_ioremap_debug [KNL] Enable debug messages in early_ioremap support. This @@ -3277,6 +3281,15 @@ For details see: Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst + module.async_probe=<bool> + [KNL] When set to true, modules will use async probing + by default. To enable/disable async probing for a + specific module, use the module specific control that + is documented under <module>.async_probe. When both + module.async_probe and <module>.async_probe are + specified, <module>.async_probe takes precedence for + the specific module. + module.sig_enforce [KNL] When CONFIG_MODULE_SIG is set, this means that modules without (valid) signatures will fail to load. diff --git a/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml b/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml index 9362b1ef9e88..14bebe1ad8f8 100644 --- a/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml +++ b/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml @@ -33,6 +33,8 @@ patternProperties: "^multi-led@[0-9a-b]$": type: object $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + description: This node represents one of the RGB LED devices on Turris Omnia. No subnodes need to be added for subchannels since this controller only diff --git a/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml new file mode 100644 index 000000000000..52252fb6bb32 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml @@ -0,0 +1,95 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/leds-bcm63138.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom's BCM63138 LEDs controller + +maintainers: + - Rafał Miłecki <[email protected]> + +description: | + This LEDs controller was first used on BCM63138 and later reused on BCM4908, + BCM6848, BCM6858, BCM63138, BCM63148, BCM63381 and BCM68360 SoCs. + + It supports up to 32 LEDs that can be connected parallelly or serially. It + also includes limited support for hardware blinking. + + Binding serially connected LEDs isn't documented yet. + +properties: + compatible: + oneOf: + - items: + - enum: + - brcm,bcm4908-leds + - brcm,bcm6848-leds + - brcm,bcm6858-leds + - brcm,bcm63148-leds + - brcm,bcm63381-leds + - brcm,bcm68360-leds + - const: brcm,bcm63138-leds + - const: brcm,bcm63138-leds + + reg: + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[a-f0-9]+$": + type: object + + $ref: common.yaml# + + properties: + reg: + maxItems: 1 + description: LED pin number + + active-low: + type: boolean + description: Makes LED active low + + required: + - reg + + unevaluatedProperties: false + +required: + - reg + - "#address-cells" + - "#size-cells" + +additionalProperties: false + +examples: + - | + #include <dt-bindings/leds/common.h> + + leds@ff800800 { + compatible = "brcm,bcm4908-leds", "brcm,bcm63138-leds"; + reg = <0xff800800 0xdc>; + + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + reg = <0x0>; + function = LED_FUNCTION_POWER; + color = <LED_COLOR_ID_GREEN>; + default-state = "on"; + }; + + led@3 { + reg = <0x3>; + function = LED_FUNCTION_STATUS; + color = <LED_COLOR_ID_GREEN>; + active-low; + }; + }; diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml index f41d021ed677..12693483231f 100644 --- a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml +++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml @@ -19,22 +19,22 @@ description: | LED class. Common LED nodes and properties are inherited from the common.yaml within this documentation directory. -patternProperties: - "^multi-led(@[0-9a-f])?$": - type: object - description: Represents the LEDs that are to be grouped. - properties: - color: - description: | - For multicolor LED support this property should be defined as either - LED_COLOR_ID_RGB or LED_COLOR_ID_MULTI which can be found in - include/linux/leds/common.h. - enum: [ 8, 9 ] - - $ref: "common.yaml#" - - required: - - color +properties: + $nodename: + pattern: "^multi-led(@[0-9a-f])?$" + + color: + description: | + For multicolor LED support this property should be defined as either + LED_COLOR_ID_RGB or LED_COLOR_ID_MULTI which can be found in + include/linux/leds/common.h. + enum: [ 8, 9 ] + +required: + - color + +allOf: + - $ref: "common.yaml#" additionalProperties: true diff --git a/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml b/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml index d11898567313..e0b658f07973 100644 --- a/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml +++ b/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml @@ -56,6 +56,8 @@ patternProperties: '^multi-led@[0-9a-f]$': type: object $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + properties: reg: minItems: 1 @@ -65,8 +67,14 @@ patternProperties: for the child node. The LED modules can either be used stand alone or grouped into a module bank. + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + patternProperties: - "(^led-[0-9a-f]$|led)": + "^led@[0-9a-f]+$": type: object $ref: common.yaml# diff --git a/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml index fdaf04e03a8d..bd6ec04a8727 100644 --- a/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml +++ b/Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml @@ -19,6 +19,14 @@ properties: multi-led: type: object + $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + + properties: + max-brightness: + description: + Maximum brightness possible for the LED + $ref: /schemas/types.yaml#/definitions/uint32 patternProperties: "^led-[0-9a-z]+$": @@ -33,6 +41,10 @@ properties: pwm-names: true + active-low: + description: For PWMs where the LED is wired to supply rather than ground. + type: boolean + color: true required: @@ -42,9 +54,6 @@ properties: required: - compatible -allOf: - - $ref: leds-class-multicolor.yaml# - additionalProperties: false examples: diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml index cd02811583ec..497db289169d 100644 --- a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml +++ b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml @@ -59,6 +59,8 @@ properties: multi-led: type: object $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + properties: "#address-cells": const: 1 diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml index 7a86e7926dd2..191c1ce15009 100644 --- a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml +++ b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml @@ -72,14 +72,16 @@ properties: type : Channel type channel : Channel number - This MU support 4 type of unidirectional channels, each type - has 4 channels. A total of 16 channels. Following types are + This MU support 5 type of unidirectional channels, each type + has 4 channels except RST channel which only has 1 channel. + A total of 17 channels. Following types are supported: 0 - TX channel with 32bit transmit register and IRQ transmit acknowledgment support. 1 - RX channel with 32bit receive register and IRQ support 2 - TX doorbell channel. Without own register and no ACK support. 3 - RX doorbell channel. + 4 - RST channel const: 2 clocks: diff --git a/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml index 3b5ba7ecc19d..f504652fc0ea 100644 --- a/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml +++ b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml @@ -15,26 +15,30 @@ maintainers: properties: compatible: - enum: - - qcom,ipq6018-apcs-apps-global - - qcom,ipq8074-apcs-apps-global - - qcom,msm8916-apcs-kpss-global - - qcom,msm8939-apcs-kpss-global - - qcom,msm8953-apcs-kpss-global - - qcom,msm8976-apcs-kpss-global - - qcom,msm8994-apcs-kpss-global - - qcom,msm8996-apcs-hmss-global - - qcom,msm8998-apcs-hmss-global - - qcom,qcm2290-apcs-hmss-global - - qcom,qcs404-apcs-apps-global - - qcom,sc7180-apss-shared - - qcom,sc8180x-apss-shared - - qcom,sdm660-apcs-hmss-global - - qcom,sdm845-apss-shared - - qcom,sm6125-apcs-hmss-global - - qcom,sm6115-apcs-hmss-global - - qcom,sm8150-apss-shared - + oneOf: + - items: + - enum: + - qcom,ipq6018-apcs-apps-global + - qcom,ipq8074-apcs-apps-global + - qcom,msm8976-apcs-kpss-global + - qcom,msm8996-apcs-hmss-global + - qcom,msm8998-apcs-hmss-global + - qcom,qcm2290-apcs-hmss-global + - qcom,sc7180-apss-shared + - qcom,sc8180x-apss-shared + - qcom,sdm660-apcs-hmss-global + - qcom,sdm845-apss-shared + - qcom,sm6125-apcs-hmss-global + - qcom,sm6115-apcs-hmss-global + - qcom,sm8150-apss-shared + - items: + - enum: + - qcom,msm8916-apcs-kpss-global + - qcom,msm8939-apcs-kpss-global + - qcom,msm8953-apcs-kpss-global + - qcom,msm8994-apcs-kpss-global + - qcom,qcs404-apcs-apps-global + - const: syscon reg: maxItems: 1 @@ -121,7 +125,7 @@ examples: #define GCC_APSS_AHB_CLK_SRC 1 #define GCC_GPLL0_AO_OUT_MAIN 123 apcs: mailbox@b011000 { - compatible = "qcom,qcs404-apcs-apps-global"; + compatible = "qcom,qcs404-apcs-apps-global", "syscon"; reg = <0x0b011000 0x1000>; #mbox-cells = <1>; clocks = <&apcs_hfpll>, <&gcc GCC_GPLL0_AO_OUT_MAIN>; diff --git a/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml b/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml index 1994be858940..baca4786ff94 100644 --- a/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml +++ b/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml @@ -25,6 +25,7 @@ properties: items: - enum: - qcom,sm6350-ipcc + - qcom,sm6375-ipcc - qcom,sm8250-ipcc - qcom,sm8350-ipcc - qcom,sm8450-ipcc diff --git a/Documentation/devicetree/bindings/serial/8250.yaml b/Documentation/devicetree/bindings/serial/8250.yaml index 5f6b113d378f..6258f5f59b19 100644 --- a/Documentation/devicetree/bindings/serial/8250.yaml +++ b/Documentation/devicetree/bindings/serial/8250.yaml @@ -62,6 +62,7 @@ properties: - const: mrvl,pxa-uart - const: nuvoton,wpcm450-uart - const: nuvoton,npcm750-uart + - const: nuvoton,npcm845-uart - const: nvidia,tegra20-uart - const: nxp,lpc3220-uart - items: diff --git a/Documentation/devicetree/bindings/serial/mediatek,uart.yaml b/Documentation/devicetree/bindings/serial/mediatek,uart.yaml new file mode 100644 index 000000000000..4ff27d6d4d5b --- /dev/null +++ b/Documentation/devicetree/bindings/serial/mediatek,uart.yaml @@ -0,0 +1,120 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/serial/mediatek,uart.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek Universal Asynchronous Receiver/Transmitter (UART) + +maintainers: + - Matthias Brugger <[email protected]> + +allOf: + - $ref: serial.yaml# + +description: | + The MediaTek UART is based on the basic 8250 UART and compatible + with 16550A, with enhancements for high speed baud rates and + support for DMA. + +properties: + compatible: + oneOf: + - const: mediatek,mt6577-uart + - items: + - enum: + - mediatek,mt2701-uart + - mediatek,mt2712-uart + - mediatek,mt6580-uart + - mediatek,mt6582-uart + - mediatek,mt6589-uart + - mediatek,mt6755-uart + - mediatek,mt6765-uart + - mediatek,mt6779-uart + - mediatek,mt6795-uart + - mediatek,mt6797-uart + - mediatek,mt7622-uart + - mediatek,mt7623-uart + - mediatek,mt7629-uart + - mediatek,mt7986-uart + - mediatek,mt8127-uart + - mediatek,mt8135-uart + - mediatek,mt8173-uart + - mediatek,mt8183-uart + - mediatek,mt8186-uart + - mediatek,mt8192-uart + - mediatek,mt8195-uart + - mediatek,mt8516-uart + - const: mediatek,mt6577-uart + + reg: + description: The base address of the UART register bank + maxItems: 1 + + clocks: + minItems: 1 + items: + - description: The clock the baudrate is derived from + - description: The bus clock for register accesses + + clock-names: + minItems: 1 + items: + - const: baud + - const: bus + + dmas: + items: + - description: phandle to TX DMA + - description: phandle to RX DMA + + dma-names: + items: + - const: tx + - const: rx + + interrupts: + minItems: 1 + maxItems: 2 + + interrupt-names: + description: + The UART interrupt and optionally the RX in-band wakeup interrupt. + minItems: 1 + items: + - const: uart + - const: wakeup + + pinctrl-0: true + pinctrl-1: true + + pinctrl-names: + minItems: 1 + items: + - const: default + - const: sleep + +required: + - compatible + - reg + - clocks + - interrupts + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + serial@11006000 { + compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart"; + reg = <0x11006000 0x400>; + interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>, + <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>; + interrupt-names = "uart", "wakeup"; + clocks = <&uart_clk>, <&bus_clk>; + clock-names = "baud", "bus"; + pinctrl-0 = <&uart_pin>; + pinctrl-1 = <&uart_pin_sleep>; + pinctrl-names = "default", "sleep"; + }; diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt deleted file mode 100644 index 113b5d6a2245..000000000000 --- a/Documentation/devicetree/bindings/serial/mtk-uart.txt +++ /dev/null @@ -1,59 +0,0 @@ -* MediaTek Universal Asynchronous Receiver/Transmitter (UART) - -Required properties: -- compatible should contain: - * "mediatek,mt2701-uart" for MT2701 compatible UARTS - * "mediatek,mt2712-uart" for MT2712 compatible UARTS - * "mediatek,mt6580-uart" for MT6580 compatible UARTS - * "mediatek,mt6582-uart" for MT6582 compatible UARTS - * "mediatek,mt6589-uart" for MT6589 compatible UARTS - * "mediatek,mt6755-uart" for MT6755 compatible UARTS - * "mediatek,mt6765-uart" for MT6765 compatible UARTS - * "mediatek,mt6779-uart" for MT6779 compatible UARTS - * "mediatek,mt6795-uart" for MT6795 compatible UARTS - * "mediatek,mt6797-uart" for MT6797 compatible UARTS - * "mediatek,mt7622-uart" for MT7622 compatible UARTS - * "mediatek,mt7623-uart" for MT7623 compatible UARTS - * "mediatek,mt7629-uart" for MT7629 compatible UARTS - * "mediatek,mt7986-uart", "mediatek,mt6577-uart" for MT7986 compatible UARTS - * "mediatek,mt8127-uart" for MT8127 compatible UARTS - * "mediatek,mt8135-uart" for MT8135 compatible UARTS - * "mediatek,mt8173-uart" for MT8173 compatible UARTS - * "mediatek,mt8183-uart", "mediatek,mt6577-uart" for MT8183 compatible UARTS - * "mediatek,mt8186-uart", "mediatek,mt6577-uart" for MT8183 compatible UARTS - * "mediatek,mt8192-uart", "mediatek,mt6577-uart" for MT8192 compatible UARTS - * "mediatek,mt8195-uart", "mediatek,mt6577-uart" for MT8195 compatible UARTS - * "mediatek,mt8516-uart" for MT8516 compatible UARTS - * "mediatek,mt6577-uart" for MT6577 and all of the above - -- reg: The base address of the UART register bank. - -- interrupts: - index 0: an interrupt specifier for the UART controller itself - index 1: optional, an interrupt specifier with edge sensitivity on Rx pin to - support Rx in-band wake up. If one would like to use this feature, - one must create an addtional pinctrl to reconfigure Rx pin to normal - GPIO before suspend. - -- clocks : Must contain an entry for each entry in clock-names. - See ../clocks/clock-bindings.txt for details. -- clock-names: - - "baud": The clock the baudrate is derived from - - "bus": The bus clock for register accesses (optional) - -For compatibility with older device trees an unnamed clock is used for the -baud clock if the baudclk does not exist. Do not use this for new designs. - -Example: - - uart0: serial@11006000 { - compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart"; - reg = <0x11006000 0x400>; - interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>, - <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>; - clocks = <&uart_clk>, <&bus_clk>; - clock-names = "baud", "bus"; - pinctrl-names = "default", "sleep"; - pinctrl-0 = <&uart_pin>; - pinctrl-1 = <&uart_pin_sleep>; - }; diff --git a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml index 87180d95cd4c..1957b9d782e8 100644 --- a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml +++ b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml @@ -57,6 +57,7 @@ properties: - items: - enum: - renesas,hscif-r8a779a0 # R-Car V3U + - renesas,hscif-r8a779f0 # R-Car S4-8 - renesas,hscif-r8a779g0 # R-Car V4H - const: renesas,rcar-gen4-hscif # R-Car Gen4 - const: renesas,hscif # generic HSCIF compatible UART diff --git a/Documentation/devicetree/bindings/serial/rs485.yaml b/Documentation/devicetree/bindings/serial/rs485.yaml index f2c9c9fe6aa7..90a1bab40f05 100644 --- a/Documentation/devicetree/bindings/serial/rs485.yaml +++ b/Documentation/devicetree/bindings/serial/rs485.yaml @@ -22,12 +22,12 @@ properties: - description: Delay between rts signal and beginning of data sent in milliseconds. It corresponds to the delay before sending data. default: 0 - maximum: 1000 + maximum: 100 - description: Delay between end of data sent and rts signal in milliseconds. It corresponds to the delay after sending data and actual release of the line. default: 0 - maximum: 1000 + maximum: 100 rs485-rts-active-low: description: drive RTS low when sending (default is high). diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml index 12137fe80acf..dc74643ae72e 100644 --- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml +++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml @@ -33,7 +33,9 @@ properties: - rockchip,rk3368-uart - rockchip,rk3399-uart - rockchip,rk3568-uart + - rockchip,rk3588-uart - rockchip,rv1108-uart + - rockchip,rv1126-uart - const: snps,dw-apb-uart - items: - enum: diff --git a/Documentation/driver-api/serial/driver.rst b/Documentation/driver-api/serial/driver.rst index 7ef83fd3917b..23c6b956cd90 100644 --- a/Documentation/driver-api/serial/driver.rst +++ b/Documentation/driver-api/serial/driver.rst @@ -25,10 +25,10 @@ Console Support --------------- The serial core provides a few helper functions. This includes identifing -the correct port structure (via uart_get_console) and decoding command line -arguments (uart_parse_options). +the correct port structure (via uart_get_console()) and decoding command line +arguments (uart_parse_options()). -There is also a helper function (uart_console_write) which performs a +There is also a helper function (uart_console_write()) which performs a character by character write, translating newlines to CRLF sequences. Driver writers are recommended to use this function rather than implementing their own version. @@ -39,7 +39,7 @@ Locking It is the responsibility of the low level hardware driver to perform the necessary locking using port->lock. There are some exceptions (which -are described in the uart_ops listing below.) +are described in the struct uart_ops listing below.) There are two locks. A per-port spinlock, and an overall semaphore. @@ -63,442 +63,20 @@ commonly referred to as the port mutex. uart_ops -------- -The uart_ops structure is the main interface between serial_core and the -hardware specific driver. It contains all the methods to control the -hardware. - - tx_empty(port) - This function tests whether the transmitter fifo and shifter - for the port described by 'port' is empty. If it is empty, - this function should return TIOCSER_TEMT, otherwise return 0. - If the port does not support this operation, then it should - return TIOCSER_TEMT. - - Locking: none. - - Interrupts: caller dependent. - - This call must not sleep - - set_mctrl(port, mctrl) - This function sets the modem control lines for port described - by 'port' to the state described by mctrl. The relevant bits - of mctrl are: - - - TIOCM_RTS RTS signal. - - TIOCM_DTR DTR signal. - - TIOCM_OUT1 OUT1 signal. - - TIOCM_OUT2 OUT2 signal. - - TIOCM_LOOP Set the port into loopback mode. - - If the appropriate bit is set, the signal should be driven - active. If the bit is clear, the signal should be driven - inactive. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - get_mctrl(port) - Returns the current state of modem control inputs. The state - of the outputs should not be returned, since the core keeps - track of their state. The state information should include: - - - TIOCM_CAR state of DCD signal - - TIOCM_CTS state of CTS signal - - TIOCM_DSR state of DSR signal - - TIOCM_RI state of RI signal - - The bit is set if the signal is currently driven active. If - the port does not support CTS, DCD or DSR, the driver should - indicate that the signal is permanently active. If RI is - not available, the signal should not be indicated as active. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - stop_tx(port) - Stop transmitting characters. This might be due to the CTS - line becoming inactive or the tty layer indicating we want - to stop transmission due to an XOFF character. - - The driver should stop transmitting characters as soon as - possible. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - start_tx(port) - Start transmitting characters. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - throttle(port) - Notify the serial driver that input buffers for the line discipline are - close to full, and it should somehow signal that no more characters - should be sent to the serial port. - This will be called only if hardware assisted flow control is enabled. - - Locking: serialized with .unthrottle() and termios modification by the - tty layer. - - unthrottle(port) - Notify the serial driver that characters can now be sent to the serial - port without fear of overrunning the input buffers of the line - disciplines. - - This will be called only if hardware assisted flow control is enabled. - - Locking: serialized with .throttle() and termios modification by the - tty layer. - - send_xchar(port,ch) - Transmit a high priority character, even if the port is stopped. - This is used to implement XON/XOFF flow control and tcflow(). If - the serial driver does not implement this function, the tty core - will append the character to the circular buffer and then call - start_tx() / stop_tx() to flush the data out. - - Do not transmit if ch == '\0' (__DISABLED_CHAR). - - Locking: none. - - Interrupts: caller dependent. - - stop_rx(port) - Stop receiving characters; the port is in the process of - being closed. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - enable_ms(port) - Enable the modem status interrupts. - - This method may be called multiple times. Modem status - interrupts should be disabled when the shutdown method is - called. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - break_ctl(port,ctl) - Control the transmission of a break signal. If ctl is - nonzero, the break signal should be transmitted. The signal - should be terminated when another call is made with a zero - ctl. - - Locking: caller holds tty_port->mutex - - startup(port) - Grab any interrupt resources and initialise any low level driver - state. Enable the port for reception. It should not activate - RTS nor DTR; this will be done via a separate call to set_mctrl. - - This method will only be called when the port is initially opened. - - Locking: port_sem taken. - - Interrupts: globally disabled. - - shutdown(port) - Disable the port, disable any break condition that may be in - effect, and free any interrupt resources. It should not disable - RTS nor DTR; this will have already been done via a separate - call to set_mctrl. - - Drivers must not access port->state once this call has completed. - - This method will only be called when there are no more users of - this port. - - Locking: port_sem taken. - - Interrupts: caller dependent. - - flush_buffer(port) - Flush any write buffers, reset any DMA state and stop any - ongoing DMA transfers. - - This will be called whenever the port->state->xmit circular - buffer is cleared. - - Locking: port->lock taken. - - Interrupts: locally disabled. - - This call must not sleep - - set_termios(port,termios,oldtermios) - Change the port parameters, including word length, parity, stop - bits. Update read_status_mask and ignore_status_mask to indicate - the types of events we are interested in receiving. Relevant - termios->c_cflag bits are: - - CSIZE - - word size - CSTOPB - - 2 stop bits - PARENB - - parity enable - PARODD - - odd parity (when PARENB is in force) - CREAD - - enable reception of characters (if not set, - still receive characters from the port, but - throw them away. - CRTSCTS - - if set, enable CTS status change reporting - CLOCAL - - if not set, enable modem status change - reporting. - - Relevant termios->c_iflag bits are: - - INPCK - - enable frame and parity error events to be - passed to the TTY layer. - BRKINT / PARMRK - - both of these enable break events to be - passed to the TTY layer. - - IGNPAR - - ignore parity and framing errors - IGNBRK - - ignore break errors, If IGNPAR is also - set, ignore overrun errors as well. - - The interaction of the iflag bits is as follows (parity error - given as an example): - - =============== ======= ====== ============================= - Parity error INPCK IGNPAR - =============== ======= ====== ============================= - n/a 0 n/a character received, marked as - TTY_NORMAL - None 1 n/a character received, marked as - TTY_NORMAL - Yes 1 0 character received, marked as - TTY_PARITY - Yes 1 1 character discarded - =============== ======= ====== ============================= - - Other flags may be used (eg, xon/xoff characters) if your - hardware supports hardware "soft" flow control. - - Locking: caller holds tty_port->mutex - - Interrupts: caller dependent. - - This call must not sleep - - set_ldisc(port,termios) - Notifier for discipline change. See ../tty/tty_ldisc.rst. - - Locking: caller holds tty_port->mutex - - pm(port,state,oldstate) - Perform any power management related activities on the specified - port. State indicates the new state (defined by - enum uart_pm_state), oldstate indicates the previous state. - - This function should not be used to grab any resources. - - This will be called when the port is initially opened and finally - closed, except when the port is also the system console. This - will occur even if CONFIG_PM is not set. - - Locking: none. - - Interrupts: caller dependent. - - type(port) - Return a pointer to a string constant describing the specified - port, or return NULL, in which case the string 'unknown' is - substituted. - - Locking: none. - - Interrupts: caller dependent. - - release_port(port) - Release any memory and IO region resources currently in use by - the port. - - Locking: none. - - Interrupts: caller dependent. - - request_port(port) - Request any memory and IO region resources required by the port. - If any fail, no resources should be registered when this function - returns, and it should return -EBUSY on failure. - - Locking: none. - - Interrupts: caller dependent. - - config_port(port,type) - Perform any autoconfiguration steps required for the port. `type` - contains a bit mask of the required configuration. UART_CONFIG_TYPE - indicates that the port requires detection and identification. - port->type should be set to the type found, or PORT_UNKNOWN if - no port was detected. - - UART_CONFIG_IRQ indicates autoconfiguration of the interrupt signal, - which should be probed using standard kernel autoprobing techniques. - This is not necessary on platforms where ports have interrupts - internally hard wired (eg, system on a chip implementations). - - Locking: none. - - Interrupts: caller dependent. - - verify_port(port,serinfo) - Verify the new serial port information contained within serinfo is - suitable for this port type. - - Locking: none. - - Interrupts: caller dependent. - - ioctl(port,cmd,arg) - Perform any port specific IOCTLs. IOCTL commands must be defined - using the standard numbering system found in <asm/ioctl.h> - - Locking: none. - - Interrupts: caller dependent. - - poll_init(port) - Called by kgdb to perform the minimal hardware initialization needed - to support poll_put_char() and poll_get_char(). Unlike ->startup() - this should not request interrupts. - - Locking: tty_mutex and tty_port->mutex taken. - - Interrupts: n/a. - - poll_put_char(port,ch) - Called by kgdb to write a single character directly to the serial - port. It can and should block until there is space in the TX FIFO. - - Locking: none. - - Interrupts: caller dependent. - - This call must not sleep - - poll_get_char(port) - Called by kgdb to read a single character directly from the serial - port. If data is available, it should be returned; otherwise - the function should return NO_POLL_CHAR immediately. - - Locking: none. - - Interrupts: caller dependent. - - This call must not sleep +.. kernel-doc:: include/linux/serial_core.h + :identifiers: uart_ops Other functions --------------- -uart_update_timeout(port,cflag,baud) - Update the FIFO drain timeout, port->timeout, according to the - number of bits, parity, stop bits and baud rate. - - Locking: caller is expected to take port->lock - - Interrupts: n/a - -uart_get_baud_rate(port,termios,old,min,max) - Return the numeric baud rate for the specified termios, taking - account of the special 38400 baud "kludge". The B0 baud rate - is mapped to 9600 baud. - - If the baud rate is not within min..max, then if old is non-NULL, - the original baud rate will be tried. If that exceeds the - min..max constraint, 9600 baud will be returned. termios will - be updated to the baud rate in use. - - Note: min..max must always allow 9600 baud to be selected. - - Locking: caller dependent. - - Interrupts: n/a - -uart_get_divisor(port,baud) - Return the divisor (baud_base / baud) for the specified baud - rate, appropriately rounded. - - If 38400 baud and custom divisor is selected, return the - custom divisor instead. - - Locking: caller dependent. - - Interrupts: n/a - -uart_match_port(port1,port2) - This utility function can be used to determine whether two - uart_port structures describe the same port. - - Locking: n/a - - Interrupts: n/a - -uart_write_wakeup(port) - A driver is expected to call this function when the number of - characters in the transmit buffer have dropped below a threshold. - - Locking: port->lock should be held. - - Interrupts: n/a - -uart_register_driver(drv) - Register a uart driver with the core driver. We in turn register - with the tty layer, and initialise the core driver per-port state. - - drv->port should be NULL, and the per-port structures should be - registered using uart_add_one_port after this call has succeeded. - - Locking: none - - Interrupts: enabled - -uart_unregister_driver() - Remove all references to a driver from the core driver. The low - level driver must have removed all its ports via the - uart_remove_one_port() if it registered them with uart_add_one_port(). - - Locking: none - - Interrupts: enabled - -**uart_suspend_port()** - -**uart_resume_port()** - -**uart_add_one_port()** - -**uart_remove_one_port()** +.. kernel-doc:: drivers/tty/serial/serial_core.c + :identifiers: uart_update_timeout uart_get_baud_rate uart_get_divisor + uart_match_port uart_write_wakeup uart_register_driver + uart_unregister_driver uart_suspend_port uart_resume_port + uart_add_one_port uart_remove_one_port uart_console_write + uart_parse_earlycon uart_parse_options uart_set_options + uart_get_lsr_info uart_handle_dcd_change uart_handle_cts_change + uart_try_toggle_sysrq uart_get_console Other notes ----------- @@ -519,31 +97,7 @@ Modem control lines via GPIO Some helpers are provided in order to set/get modem control lines via GPIO. -mctrl_gpio_init(port, idx): - This will get the {cts,rts,...}-gpios from device tree if they are - present and request them, set direction etc, and return an - allocated structure. `devm_*` functions are used, so there's no need - to call mctrl_gpio_free(). - As this sets up the irq handling make sure to not handle changes to the - gpio input lines in your driver, too. - -mctrl_gpio_free(dev, gpios): - This will free the requested gpios in mctrl_gpio_init(). - As `devm_*` functions are used, there's generally no need to call - this function. - -mctrl_gpio_to_gpiod(gpios, gidx) - This returns the gpio_desc structure associated to the modem line - index. - -mctrl_gpio_set(gpios, mctrl): - This will sets the gpios according to the mctrl state. - -mctrl_gpio_get(gpios, mctrl): - This will update mctrl with the gpios values. - -mctrl_gpio_enable_ms(gpios): - Enables irqs and handling of changes to the ms lines. - -mctrl_gpio_disable_ms(gpios): - Disables irqs and handling of changes to the ms lines. +.. kernel-doc:: drivers/tty/serial/serial_mctrl_gpio.c + :identifiers: mctrl_gpio_init mctrl_gpio_free mctrl_gpio_to_gpiod + mctrl_gpio_set mctrl_gpio_get mctrl_gpio_enable_ms + mctrl_gpio_disable_ms diff --git a/Documentation/driver-api/serial/serial-rs485.rst b/Documentation/driver-api/serial/serial-rs485.rst index 6bc824f948f9..6ebad75c74ed 100644 --- a/Documentation/driver-api/serial/serial-rs485.rst +++ b/Documentation/driver-api/serial/serial-rs485.rst @@ -38,10 +38,14 @@ RS485 Serial Communications the values given by the device tree. Any driver for devices capable of working both as RS232 and RS485 should - implement the rs485_config callback in the uart_port structure. The - serial_core calls rs485_config to do the device specific part in response - to TIOCSRS485 and TIOCGRS485 ioctls (see below). The rs485_config callback - receives a pointer to struct serial_rs485. + implement the rs485_config callback and provide rs485_supported in the + uart_port structure. The serial core calls rs485_config to do the device + specific part in response to TIOCSRS485 ioctl (see below). The rs485_config + callback receives a pointer to a sanitizated serial_rs485 structure. The + serial_rs485 userspace provides is sanitized before calling rs485_config + using rs485_supported that indicates what RS485 features the driver supports + for the uart_port. TIOCGRS485 ioctl can be used to read back the + serial_rs485 structure matching to the current configuration. 4. Usage from user-level ======================== @@ -95,7 +99,31 @@ RS485 Serial Communications /* Error handling. See errno. */ } -5. References +5. Multipoint Addressing +======================== + + The Linux kernel provides addressing mode for multipoint RS-485 serial + communications line. The addressing mode is enabled with SER_RS485_ADDRB + flag in serial_rs485. Struct serial_rs485 has two additional flags and + fields for enabling receive and destination addresses. + + Address mode flags: + - SER_RS485_ADDRB: Enabled addressing mode (sets also ADDRB in termios). + - SER_RS485_ADDR_RECV: Receive (filter) address enabled. + - SER_RS485_ADDR_DEST: Set destination address. + + Address fields (enabled with corresponding SER_RS485_ADDR_* flag): + - addr_recv: Receive address. + - addr_dest: Destination address. + + Once a receive address is set, the communication can occur only with the + particular device and other peers are filtered out. It is left up to the + receiver side to enforce the filtering. Receive address will be cleared + if SER_RS485_ADDR_RECV is not set. + + Note: not all devices supporting RS485 support multipoint addressing. + +6. References ============= [1] include/uapi/linux/serial.h diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index 98dc24f5c6f0..d0c09663dae8 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -336,6 +336,11 @@ discard_unit=%s Control discard unit, the argument can be "block", "segment" default, it is helpful for large sized SMR or ZNS devices to reduce memory cost by getting rid of fs metadata supports small discard. +memory=%s Control memory mode. This supports "normal" and "low" modes. + "low" mode is introduced to support low memory devices. + Because of the nature of low memory devices, in this mode, f2fs + will try to save memory sometimes by sacrificing performance. + "normal" mode is the default mode and same as before. ======================== ============================================================ Debugfs Entries diff --git a/Documentation/filesystems/fuse.rst b/Documentation/filesystems/fuse.rst index 8120c3c0cb4e..1e31e87aee68 100644 --- a/Documentation/filesystems/fuse.rst +++ b/Documentation/filesystems/fuse.rst @@ -279,7 +279,7 @@ How are requirements fulfilled? the filesystem or not. Note that the *ptrace* check is not strictly necessary to - prevent B/2/i, it is enough to check if mount owner has enough + prevent C/2/i, it is enough to check if mount owner has enough privilege to send signal to the process accessing the filesystem, since *SIGSTOP* can be used to get a similar effect. @@ -288,10 +288,29 @@ I think these limitations are unacceptable? If a sysadmin trusts the users enough, or can ensure through other measures, that system processes will never enter non-privileged -mounts, it can relax the last limitation with a 'user_allow_other' -config option. If this config option is set, the mounting user can -add the 'allow_other' mount option which disables the check for other -users' processes. +mounts, it can relax the last limitation in several ways: + + - With the 'user_allow_other' config option. If this config option is + set, the mounting user can add the 'allow_other' mount option which + disables the check for other users' processes. + + User namespaces have an unintuitive interaction with 'allow_other': + an unprivileged user - normally restricted from mounting with + 'allow_other' - could do so in a user namespace where they're + privileged. If any process could access such an 'allow_other' mount + this would give the mounting user the ability to manipulate + processes in user namespaces where they're unprivileged. For this + reason 'allow_other' restricts access to users in the same userns + or a descendant. + + - With the 'allow_sys_admin_access' module option. If this option is + set, super user's processes have unrestricted access to mounts + irrespective of allow_other setting or user namespace of the + mounting user. + +Note that both of these relaxations expose the system to potential +information leak or *DoS* as described in points B and C/2/i-ii in the +preceding section. Kernel - userspace interface ============================ diff --git a/MAINTAINERS b/MAINTAINERS index 868bbf31603d..56ca13d5155e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7690,6 +7690,7 @@ M: Namjae Jeon <[email protected]> M: Sungjong Seo <[email protected]> S: Maintained +T: git git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat.git F: fs/exfat/ EXT2 FILE SYSTEM @@ -13744,6 +13745,7 @@ S: Maintained T: git git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git modules-next F: include/linux/module.h F: kernel/module/ +F: scripts/module* MONOLITHIC POWER SYSTEM PMIC DRIVER M: Saravanan Sekar <[email protected]> @@ -19621,8 +19623,9 @@ F: Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt F: drivers/gpio/gpio-creg-snps.c SYNOPSYS DESIGNWARE 8250 UART DRIVER +M: Ilpo Järvinen <[email protected]> R: Andy Shevchenko <[email protected]> -S: Maintained +S: Supported F: drivers/tty/serial/8250/8250_dw.c F: drivers/tty/serial/8250/8250_dwlib.* F: drivers/tty/serial/8250/8250_lpss.c diff --git a/arch/mips/ath79/early_printk.c b/arch/mips/ath79/early_printk.c index 8751d067f98f..34c4dfdf46b4 100644 --- a/arch/mips/ath79/early_printk.c +++ b/arch/mips/ath79/early_printk.c @@ -8,6 +8,7 @@ #include <linux/io.h> #include <linux/errno.h> +#include <linux/serial.h> #include <linux/serial_reg.h> #include <asm/addrspace.h> #include <asm/setup.h> @@ -18,38 +19,34 @@ static void (*_prom_putchar)(char); -static inline void prom_putchar_wait(void __iomem *reg, u32 mask, u32 val) +static inline void prom_putchar_wait(void __iomem *reg, u32 val) { u32 t; do { t = __raw_readl(reg); - if ((t & mask) == val) + if ((t & val) == val) break; } while (1); } -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - static void prom_putchar_ar71xx(char ch) { void __iomem *base = (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE)); - prom_putchar_wait(base + UART_LSR * 4, BOTH_EMPTY, BOTH_EMPTY); + prom_putchar_wait(base + UART_LSR * 4, UART_LSR_BOTH_EMPTY); __raw_writel((unsigned char)ch, base + UART_TX * 4); - prom_putchar_wait(base + UART_LSR * 4, BOTH_EMPTY, BOTH_EMPTY); + prom_putchar_wait(base + UART_LSR * 4, UART_LSR_BOTH_EMPTY); } static void prom_putchar_ar933x(char ch) { void __iomem *base = (void __iomem *)(KSEG1ADDR(AR933X_UART_BASE)); - prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR, - AR933X_UART_DATA_TX_CSR); + prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR); __raw_writel(AR933X_UART_DATA_TX_CSR | (unsigned char)ch, base + AR933X_UART_DATA_REG); - prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR, - AR933X_UART_DATA_TX_CSR); + prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR); } static void prom_putchar_dummy(char ch) diff --git a/drivers/accessibility/braille/braille_console.c b/drivers/accessibility/braille/braille_console.c index fdc6b593f500..c4d54a5326b1 100644 --- a/drivers/accessibility/braille/braille_console.c +++ b/drivers/accessibility/braille/braille_console.c @@ -131,7 +131,7 @@ static void vc_refresh(struct vc_data *vc) for (i = 0; i < WIDTH; i++) { u16 glyph = screen_glyph(vc, 2 * (vc_x + i) + vc_y * vc->vc_size_row); - buf[i] = inverse_translate(vc, glyph, 1); + buf[i] = inverse_translate(vc, glyph, true); } braille_write(buf); } diff --git a/drivers/accessibility/speakup/main.c b/drivers/accessibility/speakup/main.c index d726537fa16c..f52265293482 100644 --- a/drivers/accessibility/speakup/main.c +++ b/drivers/accessibility/speakup/main.c @@ -470,7 +470,7 @@ static u16 get_char(struct vc_data *vc, u16 *pos, u_char *attribs) c |= 0x100; } - ch = inverse_translate(vc, c, 1); + ch = inverse_translate(vc, c, true); *attribs = (w & 0xff00) >> 8; } return ch; diff --git a/drivers/accessibility/speakup/serialio.h b/drivers/accessibility/speakup/serialio.h index 6f8f86f161bb..b4f9a1925b81 100644 --- a/drivers/accessibility/speakup/serialio.h +++ b/drivers/accessibility/speakup/serialio.h @@ -33,9 +33,8 @@ struct old_serial_port { #define NUM_DISABLE_TIMEOUTS 3 /* buffer timeout in ms */ #define SPK_TIMEOUT 100 -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) #define spk_serial_tx_busy() \ - ((inb(speakup_info.port_tts + UART_LSR) & BOTH_EMPTY) != BOTH_EMPTY) + (!uart_lsr_tx_empty(inb(speakup_info.port_tts + UART_LSR))) #endif diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 6218bbf6863a..eca7afd366d6 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -171,6 +171,14 @@ int vmbus_connect(void) goto cleanup; } + vmbus_connection.rescind_work_queue = + create_workqueue("hv_vmbus_rescind"); + if (!vmbus_connection.rescind_work_queue) { + ret = -ENOMEM; + goto cleanup; + } + vmbus_connection.ignore_any_offer_msg = false; + vmbus_connection.handle_primary_chan_wq = create_workqueue("hv_pri_chan"); if (!vmbus_connection.handle_primary_chan_wq) { @@ -357,6 +365,9 @@ void vmbus_disconnect(void) if (vmbus_connection.handle_primary_chan_wq) destroy_workqueue(vmbus_connection.handle_primary_chan_wq); + if (vmbus_connection.rescind_work_queue) + destroy_workqueue(vmbus_connection.rescind_work_queue); + if (vmbus_connection.work_queue) destroy_workqueue(vmbus_connection.work_queue); diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 91e8a72eee14..fdf6decacf06 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -11,6 +11,7 @@ #include <linux/kernel.h> #include <linux/jiffies.h> #include <linux/mman.h> +#include <linux/debugfs.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/module.h> @@ -248,7 +249,7 @@ struct dm_capabilities_resp_msg { * num_committed: Committed memory in pages. * page_file_size: The accumulated size of all page files * in the system in pages. - * zero_free: The nunber of zero and free pages. + * zero_free: The number of zero and free pages. * page_file_writes: The writes to the page file in pages. * io_diff: An indicator of file cache efficiency or page file activity, * calculated as File Cache Page Fault Count - Page Read Count. @@ -567,6 +568,11 @@ struct hv_dynmem_device { __u32 version; struct page_reporting_dev_info pr_dev_info; + + /* + * Maximum number of pages that can be hot_add-ed + */ + __u64 max_dynamic_page_count; }; static struct hv_dynmem_device dm_device; @@ -1078,6 +1084,7 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg) pr_info("Max. dynamic memory size: %llu MB\n", (*max_page_count) >> (20 - HV_HYP_PAGE_SHIFT)); + dm->max_dynamic_page_count = *max_page_count; } break; @@ -1117,6 +1124,19 @@ static unsigned long compute_balloon_floor(void) } /* + * Compute total committed memory pages + */ + +static unsigned long get_pages_committed(struct hv_dynmem_device *dm) +{ + return vm_memory_committed() + + dm->num_pages_ballooned + + (dm->num_pages_added > dm->num_pages_onlined ? + dm->num_pages_added - dm->num_pages_onlined : 0) + + compute_balloon_floor(); +} + +/* * Post our status as it relates memory pressure to the * host. Host expects the guests to post this status * periodically at 1 second intervals. @@ -1157,11 +1177,7 @@ static void post_status(struct hv_dynmem_device *dm) * asking us to balloon them out. */ num_pages_avail = si_mem_available(); - num_pages_committed = vm_memory_committed() + - dm->num_pages_ballooned + - (dm->num_pages_added > dm->num_pages_onlined ? - dm->num_pages_added - dm->num_pages_onlined : 0) + - compute_balloon_floor(); + num_pages_committed = get_pages_committed(dm); trace_balloon_status(num_pages_avail, num_pages_committed, vm_memory_committed(), dm->num_pages_ballooned, @@ -1807,6 +1823,109 @@ out: return ret; } +/* + * DEBUGFS Interface + */ +#ifdef CONFIG_DEBUG_FS + +/** + * hv_balloon_debug_show - shows statistics of balloon operations. + * @f: pointer to the &struct seq_file. + * @offset: ignored. + * + * Provides the statistics that can be accessed in hv-balloon in the debugfs. + * + * Return: zero on success or an error code. + */ +static int hv_balloon_debug_show(struct seq_file *f, void *offset) +{ + struct hv_dynmem_device *dm = f->private; + char *sname; + + seq_printf(f, "%-22s: %u.%u\n", "host_version", + DYNMEM_MAJOR_VERSION(dm->version), + DYNMEM_MINOR_VERSION(dm->version)); + + seq_printf(f, "%-22s:", "capabilities"); + if (ballooning_enabled()) + seq_puts(f, " enabled"); + + if (hot_add_enabled()) + seq_puts(f, " hot_add"); + + seq_puts(f, "\n"); + + seq_printf(f, "%-22s: %u", "state", dm->state); + switch (dm->state) { + case DM_INITIALIZING: + sname = "Initializing"; + break; + case DM_INITIALIZED: + sname = "Initialized"; + break; + case DM_BALLOON_UP: + sname = "Balloon Up"; + break; + case DM_BALLOON_DOWN: + sname = "Balloon Down"; + break; + case DM_HOT_ADD: + sname = "Hot Add"; + break; + case DM_INIT_ERROR: + sname = "Error"; + break; + default: + sname = "Unknown"; + } + seq_printf(f, " (%s)\n", sname); + + /* HV Page Size */ + seq_printf(f, "%-22s: %ld\n", "page_size", HV_HYP_PAGE_SIZE); + + /* Pages added with hot_add */ + seq_printf(f, "%-22s: %u\n", "pages_added", dm->num_pages_added); + + /* pages that are "onlined"/used from pages_added */ + seq_printf(f, "%-22s: %u\n", "pages_onlined", dm->num_pages_onlined); + + /* pages we have given back to host */ + seq_printf(f, "%-22s: %u\n", "pages_ballooned", dm->num_pages_ballooned); + + seq_printf(f, "%-22s: %lu\n", "total_pages_committed", + get_pages_committed(dm)); + + seq_printf(f, "%-22s: %llu\n", "max_dynamic_page_count", + dm->max_dynamic_page_count); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(hv_balloon_debug); + +static void hv_balloon_debugfs_init(struct hv_dynmem_device *b) +{ + debugfs_create_file("hv-balloon", 0444, NULL, b, + &hv_balloon_debug_fops); +} + +static void hv_balloon_debugfs_exit(struct hv_dynmem_device *b) +{ + debugfs_remove(debugfs_lookup("hv-balloon", NULL)); +} + +#else + +static inline void hv_balloon_debugfs_init(struct hv_dynmem_device *b) +{ +} + +static inline void hv_balloon_debugfs_exit(struct hv_dynmem_device *b) +{ +} + +#endif /* CONFIG_DEBUG_FS */ + static int balloon_probe(struct hv_device *dev, const struct hv_vmbus_device_id *dev_id) { @@ -1854,6 +1973,8 @@ static int balloon_probe(struct hv_device *dev, goto probe_error; } + hv_balloon_debugfs_init(&dm_device); + return 0; probe_error: @@ -1879,6 +2000,8 @@ static int balloon_remove(struct hv_device *dev) if (dm->num_pages_ballooned != 0) pr_warn("Ballooned pages: %d\n", dm->num_pages_ballooned); + hv_balloon_debugfs_exit(dm); + cancel_work_sync(&dm->balloon_wrk.wrk); cancel_work_sync(&dm->ha_wrk.wrk); diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 4f5b824b16cf..dc673edf053c 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -261,6 +261,13 @@ struct vmbus_connection { struct workqueue_struct *work_queue; struct workqueue_struct *handle_primary_chan_wq; struct workqueue_struct *handle_sub_chan_wq; + struct workqueue_struct *rescind_work_queue; + + /* + * On suspension of the vmbus, the accumulated offer messages + * must be dropped. + */ + bool ignore_any_offer_msg; /* * The number of sub-channels and hv_sock channels that should be diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 547ae334e5cd..23c680d1a0f5 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1160,7 +1160,9 @@ void vmbus_on_msg_dpc(unsigned long data) * work queue: the RESCIND handler can not start to * run before the OFFER handler finishes. */ - schedule_work(&ctx->work); + if (vmbus_connection.ignore_any_offer_msg) + break; + queue_work(vmbus_connection.rescind_work_queue, &ctx->work); break; case CHANNELMSG_OFFERCHANNEL: @@ -1186,6 +1188,8 @@ void vmbus_on_msg_dpc(unsigned long data) * to the CPUs which will execute the offer & rescind * works by the time these works will start execution. */ + if (vmbus_connection.ignore_any_offer_msg) + break; atomic_inc(&vmbus_connection.offer_in_progress); fallthrough; @@ -2446,15 +2450,20 @@ acpi_walk_err: #ifdef CONFIG_PM_SLEEP static int vmbus_bus_suspend(struct device *dev) { + struct hv_per_cpu_context *hv_cpu = per_cpu_ptr( + hv_context.cpu_context, VMBUS_CONNECT_CPU); struct vmbus_channel *channel, *sc; - while (atomic_read(&vmbus_connection.offer_in_progress) != 0) { - /* - * We wait here until the completion of any channel - * offers that are currently in progress. - */ - usleep_range(1000, 2000); - } + tasklet_disable(&hv_cpu->msg_dpc); + vmbus_connection.ignore_any_offer_msg = true; + /* The tasklet_enable() takes care of providing a memory barrier */ + tasklet_enable(&hv_cpu->msg_dpc); + + /* Drain all the workqueues as we are in suspend */ + drain_workqueue(vmbus_connection.rescind_work_queue); + drain_workqueue(vmbus_connection.work_queue); + drain_workqueue(vmbus_connection.handle_primary_chan_wq); + drain_workqueue(vmbus_connection.handle_sub_chan_wq); mutex_lock(&vmbus_connection.channel_mutex); list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { @@ -2531,6 +2540,8 @@ static int vmbus_bus_resume(struct device *dev) size_t msgsize; int ret; + vmbus_connection.ignore_any_offer_msg = false; + /* * We only use the 'vmbus_proto_version', which was in use before * hibernation, to re-negotiate with the host. diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c index 33eeff94fc2a..1fb3a2550e29 100644 --- a/drivers/hwspinlock/omap_hwspinlock.c +++ b/drivers/hwspinlock/omap_hwspinlock.c @@ -94,11 +94,9 @@ static int omap_hwspinlock_probe(struct platform_device *pdev) * the module SYSSTATUS register */ pm_runtime_enable(&pdev->dev); - ret = pm_runtime_get_sync(&pdev->dev); - if (ret < 0) { - pm_runtime_put_noidle(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) goto runtime_err; - } /* Determine number of locks */ i = readl(io_base + SYSSTATUS_OFFSET); diff --git a/drivers/hwspinlock/qcom_hwspinlock.c b/drivers/hwspinlock/qcom_hwspinlock.c index 364710966665..80ea45b3a815 100644 --- a/drivers/hwspinlock/qcom_hwspinlock.c +++ b/drivers/hwspinlock/qcom_hwspinlock.c @@ -19,6 +19,11 @@ #define QCOM_MUTEX_APPS_PROC_ID 1 #define QCOM_MUTEX_NUM_LOCKS 32 +struct qcom_hwspinlock_of_data { + u32 offset; + u32 stride; +}; + static int qcom_hwspinlock_trylock(struct hwspinlock *lock) { struct regmap_field *field = lock->priv; @@ -63,9 +68,20 @@ static const struct hwspinlock_ops qcom_hwspinlock_ops = { .unlock = qcom_hwspinlock_unlock, }; +static const struct qcom_hwspinlock_of_data of_sfpb_mutex = { + .offset = 0x4, + .stride = 0x4, +}; + +/* All modern platform has offset 0 and stride of 4k */ +static const struct qcom_hwspinlock_of_data of_tcsr_mutex = { + .offset = 0, + .stride = 0x1000, +}; + static const struct of_device_id qcom_hwspinlock_of_match[] = { - { .compatible = "qcom,sfpb-mutex" }, - { .compatible = "qcom,tcsr-mutex" }, + { .compatible = "qcom,sfpb-mutex", .data = &of_sfpb_mutex }, + { .compatible = "qcom,tcsr-mutex", .data = &of_tcsr_mutex }, { } }; MODULE_DEVICE_TABLE(of, qcom_hwspinlock_of_match); @@ -112,12 +128,14 @@ static const struct regmap_config tcsr_mutex_config = { static struct regmap *qcom_hwspinlock_probe_mmio(struct platform_device *pdev, u32 *offset, u32 *stride) { + const struct qcom_hwspinlock_of_data *data; struct device *dev = &pdev->dev; void __iomem *base; - /* All modern platform has offset 0 and stride of 4k */ - *offset = 0; - *stride = 0x1000; + data = of_device_get_match_data(dev); + + *offset = data->offset; + *stride = data->stride; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a49979f41eee..499d0f215a8b 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -447,16 +447,16 @@ config LEDS_LP8860 config LEDS_CLEVO_MAIL tristate "Mail LED on Clevo notebook" - depends on LEDS_CLASS + depends on LEDS_CLASS && BROKEN depends on X86 && SERIO_I8042 && DMI help This driver makes the mail LED accessible from userspace - programs through the leds subsystem. This LED have three - known mode: off, blink at 0.5Hz and blink at 1Hz. + programs through the LEDs subsystem. This LED has three + known modes: off, blink at 0.5Hz and blink at 1Hz. The driver supports two kinds of interface: using ledtrig-timer or through /sys/class/leds/clevo::mail/brightness. As this LED - cannot change it's brightness it blinks instead. The brightness + cannot change its brightness it blinks instead. The brightness value 0 means off, 1..127 means blink at 0.5Hz and 128..255 means blink at 1Hz. @@ -697,7 +697,7 @@ config LEDS_MENF21BMC config LEDS_IS31FL319X tristate "LED Support for ISSI IS31FL319x I2C LED controller family" - depends on LEDS_CLASS && I2C && OF + depends on LEDS_CLASS && I2C select REGMAP_I2C help This option enables support for LEDs connected to ISSI IS31FL319x diff --git a/drivers/leds/blink/Kconfig b/drivers/leds/blink/Kconfig index 59ba81e40e85..945c84286a4e 100644 --- a/drivers/leds/blink/Kconfig +++ b/drivers/leds/blink/Kconfig @@ -1,3 +1,17 @@ +config LEDS_BCM63138 + tristate "LED Support for Broadcom BCM63138 SoC" + depends on LEDS_CLASS + depends on ARCH_BCM4908 || ARCH_BCM_5301X || BCM63XX || COMPILE_TEST + depends on HAS_IOMEM + depends on OF + default ARCH_BCM4908 + help + This option enables support for LED controller that is part of + BCM63138 SoC. The same hardware block is known to be also used + in BCM4908, BCM6848, BCM6858, BCM63148, BCM63381 and BCM68360. + + If compiled as module it will be called leds-bcm63138. + config LEDS_LGM tristate "LED support for LGM SoC series" depends on X86 || COMPILE_TEST diff --git a/drivers/leds/blink/Makefile b/drivers/leds/blink/Makefile index fa5d04dccf13..447029f4153a 100644 --- a/drivers/leds/blink/Makefile +++ b/drivers/leds/blink/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_LEDS_BCM63138) += leds-bcm63138.o obj-$(CONFIG_LEDS_LGM) += leds-lgm-sso.o diff --git a/drivers/leds/blink/leds-bcm63138.c b/drivers/leds/blink/leds-bcm63138.c new file mode 100644 index 000000000000..2cf2761e4914 --- /dev/null +++ b/drivers/leds/blink/leds-bcm63138.c @@ -0,0 +1,307 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2021 Rafał Miłecki <[email protected]> + */ +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/pinctrl/consumer.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define BCM63138_MAX_LEDS 32 +#define BCM63138_MAX_BRIGHTNESS 9 + +#define BCM63138_LED_BITS 4 /* how many bits control a single LED */ +#define BCM63138_LED_MASK ((1 << BCM63138_LED_BITS) - 1) /* 0xf */ +#define BCM63138_LEDS_PER_REG (32 / BCM63138_LED_BITS) /* 8 */ + +#define BCM63138_GLB_CTRL 0x00 +#define BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL 0x00000002 +#define BCM63138_GLB_CTRL_SERIAL_LED_EN_POL 0x00000008 +#define BCM63138_MASK 0x04 +#define BCM63138_HW_LED_EN 0x08 +#define BCM63138_SERIAL_LED_SHIFT_SEL 0x0c +#define BCM63138_FLASH_RATE_CTRL1 0x10 +#define BCM63138_FLASH_RATE_CTRL2 0x14 +#define BCM63138_FLASH_RATE_CTRL3 0x18 +#define BCM63138_FLASH_RATE_CTRL4 0x1c +#define BCM63138_BRIGHT_CTRL1 0x20 +#define BCM63138_BRIGHT_CTRL2 0x24 +#define BCM63138_BRIGHT_CTRL3 0x28 +#define BCM63138_BRIGHT_CTRL4 0x2c +#define BCM63138_POWER_LED_CFG 0x30 +#define BCM63138_HW_POLARITY 0xb4 +#define BCM63138_SW_DATA 0xb8 +#define BCM63138_SW_POLARITY 0xbc +#define BCM63138_PARALLEL_LED_POLARITY 0xc0 +#define BCM63138_SERIAL_LED_POLARITY 0xc4 +#define BCM63138_HW_LED_STATUS 0xc8 +#define BCM63138_FLASH_CTRL_STATUS 0xcc +#define BCM63138_FLASH_BRT_CTRL 0xd0 +#define BCM63138_FLASH_P_LED_OUT_STATUS 0xd4 +#define BCM63138_FLASH_S_LED_OUT_STATUS 0xd8 + +struct bcm63138_leds { + struct device *dev; + void __iomem *base; + spinlock_t lock; +}; + +struct bcm63138_led { + struct bcm63138_leds *leds; + struct led_classdev cdev; + u32 pin; + bool active_low; +}; + +/* + * I/O access + */ + +static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg, + u32 data) +{ + writel(data, leds->base + reg); +} + +static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds, + unsigned int reg) +{ + return readl(leds->base + reg); +} + +static void bcm63138_leds_update_bits(struct bcm63138_leds *leds, + unsigned int reg, u32 mask, u32 val) +{ + WARN_ON(val & ~mask); + + bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask)); +} + +/* + * Helpers + */ + +static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds, + struct bcm63138_led *led, + u8 value) +{ + int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4; + int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS; + + bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset, + BCM63138_LED_MASK << shift, value << shift); +} + +static void bcm63138_leds_set_bright(struct bcm63138_leds *leds, + struct bcm63138_led *led, + u8 value) +{ + int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4; + int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS; + + bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset, + BCM63138_LED_MASK << shift, value << shift); +} + +static void bcm63138_leds_enable_led(struct bcm63138_leds *leds, + struct bcm63138_led *led, + enum led_brightness value) +{ + u32 bit = BIT(led->pin); + + bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, value ? bit : 0); +} + +/* + * API callbacks + */ + +static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev); + struct bcm63138_leds *leds = led->leds; + unsigned long flags; + + spin_lock_irqsave(&leds->lock, flags); + + bcm63138_leds_enable_led(leds, led, value); + if (!value) + bcm63138_leds_set_flash_rate(leds, led, 0); + else + bcm63138_leds_set_bright(leds, led, value); + + spin_unlock_irqrestore(&leds->lock, flags); +} + +static int bcm63138_leds_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev); + struct bcm63138_leds *leds = led->leds; + unsigned long flags; + u8 value; + + if (!*delay_on && !*delay_off) { + *delay_on = 640; + *delay_off = 640; + } + + if (*delay_on != *delay_off) { + dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n"); + return -EINVAL; + } + + switch (*delay_on) { + case 1152 ... 1408: /* 1280 ms ± 10% */ + value = 0x7; + break; + case 576 ... 704: /* 640 ms ± 10% */ + value = 0x6; + break; + case 288 ... 352: /* 320 ms ± 10% */ + value = 0x5; + break; + case 126 ... 154: /* 140 ms ± 10% */ + value = 0x4; + break; + case 59 ... 72: /* 65 ms ± 10% */ + value = 0x3; + break; + default: + dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n", + *delay_on); + return -EINVAL; + } + + spin_lock_irqsave(&leds->lock, flags); + + bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS); + bcm63138_leds_set_flash_rate(leds, led, value); + + spin_unlock_irqrestore(&leds->lock, flags); + + return 0; +} + +/* + * LED driver + */ + +static void bcm63138_leds_create_led(struct bcm63138_leds *leds, + struct device_node *np) +{ + struct led_init_data init_data = { + .fwnode = of_fwnode_handle(np), + }; + struct device *dev = leds->dev; + struct bcm63138_led *led; + struct pinctrl *pinctrl; + u32 bit; + int err; + + led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); + if (!led) { + dev_err(dev, "Failed to alloc LED\n"); + return; + } + + led->leds = leds; + + if (of_property_read_u32(np, "reg", &led->pin)) { + dev_err(dev, "Missing \"reg\" property in %pOF\n", np); + goto err_free; + } + + if (led->pin >= BCM63138_MAX_LEDS) { + dev_err(dev, "Invalid \"reg\" value %d\n", led->pin); + goto err_free; + } + + led->active_low = of_property_read_bool(np, "active-low"); + + led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS; + led->cdev.brightness_set = bcm63138_leds_brightness_set; + led->cdev.blink_set = bcm63138_leds_blink_set; + + err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data); + if (err) { + dev_err(dev, "Failed to register LED %pOF: %d\n", np, err); + goto err_free; + } + + pinctrl = devm_pinctrl_get_select_default(led->cdev.dev); + if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) { + dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n", + np, PTR_ERR(pinctrl)); + } + + bit = BIT(led->pin); + bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit, + led->active_low ? 0 : bit); + bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0); + bcm63138_leds_set_flash_rate(leds, led, 0); + bcm63138_leds_enable_led(leds, led, led->cdev.brightness); + + return; + +err_free: + devm_kfree(dev, led); +} + +static int bcm63138_leds_probe(struct platform_device *pdev) +{ + struct device_node *np = dev_of_node(&pdev->dev); + struct device *dev = &pdev->dev; + struct bcm63138_leds *leds; + struct device_node *child; + + leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); + if (!leds) + return -ENOMEM; + + leds->dev = dev; + + leds->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(leds->base)) + return PTR_ERR(leds->base); + + spin_lock_init(&leds->lock); + + bcm63138_leds_write(leds, BCM63138_GLB_CTRL, + BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL | + BCM63138_GLB_CTRL_SERIAL_LED_EN_POL); + bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0); + bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0); + bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0); + + for_each_available_child_of_node(np, child) { + bcm63138_leds_create_led(leds, child); + } + + return 0; +} + +static const struct of_device_id bcm63138_leds_of_match_table[] = { + { .compatible = "brcm,bcm63138-leds", }, + { }, +}; + +static struct platform_driver bcm63138_leds_driver = { + .probe = bcm63138_leds_probe, + .driver = { + .name = "leds-bcm63xxx", + .of_match_table = bcm63138_leds_of_match_table, + }, +}; + +module_platform_driver(bcm63138_leds_driver); + +MODULE_AUTHOR("Rafał Miłecki"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(of, bcm63138_leds_of_match_table); diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c index 4161b9dd7e48..52b59b62f437 100644 --- a/drivers/leds/leds-is31fl319x.c +++ b/drivers/leds/leds-is31fl319x.c @@ -11,9 +11,9 @@ #include <linux/err.h> #include <linux/i2c.h> #include <linux/leds.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> -#include <linux/of.h> -#include <linux/of_device.h> +#include <linux/property.h> #include <linux/regmap.h> #include <linux/slab.h> #include <linux/delay.h> @@ -21,39 +21,64 @@ /* register numbers */ #define IS31FL319X_SHUTDOWN 0x00 -#define IS31FL319X_CTRL1 0x01 -#define IS31FL319X_CTRL2 0x02 -#define IS31FL319X_CONFIG1 0x03 -#define IS31FL319X_CONFIG2 0x04 -#define IS31FL319X_RAMP_MODE 0x05 -#define IS31FL319X_BREATH_MASK 0x06 -#define IS31FL319X_PWM(channel) (0x07 + channel) -#define IS31FL319X_DATA_UPDATE 0x10 -#define IS31FL319X_T0(channel) (0x11 + channel) -#define IS31FL319X_T123_1 0x1a -#define IS31FL319X_T123_2 0x1b -#define IS31FL319X_T123_3 0x1c -#define IS31FL319X_T4(channel) (0x1d + channel) -#define IS31FL319X_TIME_UPDATE 0x26 -#define IS31FL319X_RESET 0xff - -#define IS31FL319X_REG_CNT (IS31FL319X_RESET + 1) + +/* registers for 3190, 3191 and 3193 */ +#define IS31FL3190_BREATHING 0x01 +#define IS31FL3190_LEDMODE 0x02 +#define IS31FL3190_CURRENT 0x03 +#define IS31FL3190_PWM(channel) (0x04 + channel) +#define IS31FL3190_DATA_UPDATE 0x07 +#define IS31FL3190_T0(channel) (0x0a + channel) +#define IS31FL3190_T1T2(channel) (0x10 + channel) +#define IS31FL3190_T3T4(channel) (0x16 + channel) +#define IS31FL3190_TIME_UPDATE 0x1c +#define IS31FL3190_LEDCONTROL 0x1d +#define IS31FL3190_RESET 0x2f + +#define IS31FL3190_CURRENT_uA_MIN 5000 +#define IS31FL3190_CURRENT_uA_DEFAULT 42000 +#define IS31FL3190_CURRENT_uA_MAX 42000 +#define IS31FL3190_CURRENT_MASK GENMASK(4, 2) +#define IS31FL3190_CURRENT_5_mA 0x02 +#define IS31FL3190_CURRENT_10_mA 0x01 +#define IS31FL3190_CURRENT_17dot5_mA 0x04 +#define IS31FL3190_CURRENT_30_mA 0x03 +#define IS31FL3190_CURRENT_42_mA 0x00 + +/* registers for 3196 and 3199 */ +#define IS31FL3196_CTRL1 0x01 +#define IS31FL3196_CTRL2 0x02 +#define IS31FL3196_CONFIG1 0x03 +#define IS31FL3196_CONFIG2 0x04 +#define IS31FL3196_RAMP_MODE 0x05 +#define IS31FL3196_BREATH_MARK 0x06 +#define IS31FL3196_PWM(channel) (0x07 + channel) +#define IS31FL3196_DATA_UPDATE 0x10 +#define IS31FL3196_T0(channel) (0x11 + channel) +#define IS31FL3196_T123_1 0x1a +#define IS31FL3196_T123_2 0x1b +#define IS31FL3196_T123_3 0x1c +#define IS31FL3196_T4(channel) (0x1d + channel) +#define IS31FL3196_TIME_UPDATE 0x26 +#define IS31FL3196_RESET 0xff + +#define IS31FL3196_REG_CNT (IS31FL3196_RESET + 1) #define IS31FL319X_MAX_LEDS 9 /* CS (Current Setting) in CONFIG2 register */ -#define IS31FL319X_CONFIG2_CS_SHIFT 4 -#define IS31FL319X_CONFIG2_CS_MASK 0x7 -#define IS31FL319X_CONFIG2_CS_STEP_REF 12 +#define IS31FL3196_CONFIG2_CS_SHIFT 4 +#define IS31FL3196_CONFIG2_CS_MASK GENMASK(2, 0) +#define IS31FL3196_CONFIG2_CS_STEP_REF 12 -#define IS31FL319X_CURRENT_MIN ((u32)5000) -#define IS31FL319X_CURRENT_MAX ((u32)40000) -#define IS31FL319X_CURRENT_STEP ((u32)5000) -#define IS31FL319X_CURRENT_DEFAULT ((u32)20000) +#define IS31FL3196_CURRENT_uA_MIN 5000 +#define IS31FL3196_CURRENT_uA_MAX 40000 +#define IS31FL3196_CURRENT_uA_STEP 5000 +#define IS31FL3196_CURRENT_uA_DEFAULT 20000 /* Audio gain in CONFIG2 register */ -#define IS31FL319X_AUDIO_GAIN_DB_MAX ((u32)21) -#define IS31FL319X_AUDIO_GAIN_DB_STEP ((u32)3) +#define IS31FL3196_AUDIO_GAIN_DB_MAX ((u32)21) +#define IS31FL3196_AUDIO_GAIN_DB_STEP 3 /* * regmap is used as a cache of chip's register space, @@ -78,52 +103,161 @@ struct is31fl319x_chip { struct is31fl319x_chipdef { int num_leds; + u8 reset_reg; + const struct regmap_config *is31fl319x_regmap_config; + int (*brightness_set)(struct led_classdev *cdev, enum led_brightness brightness); + u32 current_default; + u32 current_min; + u32 current_max; + bool is_3196or3199; }; -static const struct is31fl319x_chipdef is31fl3190_cdef = { - .num_leds = 1, -}; +static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg) +{ + /* we have no readable registers */ + return false; +} -static const struct is31fl319x_chipdef is31fl3193_cdef = { - .num_leds = 3, +static bool is31fl3190_volatile_reg(struct device *dev, unsigned int reg) +{ + /* volatile registers are not cached */ + switch (reg) { + case IS31FL3190_DATA_UPDATE: + case IS31FL3190_TIME_UPDATE: + case IS31FL3190_RESET: + return true; /* always write-through */ + default: + return false; + } +} + +static const struct reg_default is31fl3190_reg_defaults[] = { + { IS31FL3190_LEDMODE, 0x00 }, + { IS31FL3190_CURRENT, 0x00 }, + { IS31FL3190_PWM(0), 0x00 }, + { IS31FL3190_PWM(1), 0x00 }, + { IS31FL3190_PWM(2), 0x00 }, }; -static const struct is31fl319x_chipdef is31fl3196_cdef = { - .num_leds = 6, +static struct regmap_config is31fl3190_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = IS31FL3190_RESET, + .cache_type = REGCACHE_FLAT, + .readable_reg = is31fl319x_readable_reg, + .volatile_reg = is31fl3190_volatile_reg, + .reg_defaults = is31fl3190_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(is31fl3190_reg_defaults), }; -static const struct is31fl319x_chipdef is31fl3199_cdef = { - .num_leds = 9, +static bool is31fl3196_volatile_reg(struct device *dev, unsigned int reg) +{ + /* volatile registers are not cached */ + switch (reg) { + case IS31FL3196_DATA_UPDATE: + case IS31FL3196_TIME_UPDATE: + case IS31FL3196_RESET: + return true; /* always write-through */ + default: + return false; + } +} + +static const struct reg_default is31fl3196_reg_defaults[] = { + { IS31FL3196_CONFIG1, 0x00 }, + { IS31FL3196_CONFIG2, 0x00 }, + { IS31FL3196_PWM(0), 0x00 }, + { IS31FL3196_PWM(1), 0x00 }, + { IS31FL3196_PWM(2), 0x00 }, + { IS31FL3196_PWM(3), 0x00 }, + { IS31FL3196_PWM(4), 0x00 }, + { IS31FL3196_PWM(5), 0x00 }, + { IS31FL3196_PWM(6), 0x00 }, + { IS31FL3196_PWM(7), 0x00 }, + { IS31FL3196_PWM(8), 0x00 }, }; -static const struct of_device_id of_is31fl319x_match[] = { - { .compatible = "issi,is31fl3190", .data = &is31fl3190_cdef, }, - { .compatible = "issi,is31fl3191", .data = &is31fl3190_cdef, }, - { .compatible = "issi,is31fl3193", .data = &is31fl3193_cdef, }, - { .compatible = "issi,is31fl3196", .data = &is31fl3196_cdef, }, - { .compatible = "issi,is31fl3199", .data = &is31fl3199_cdef, }, - { .compatible = "si-en,sn3199", .data = &is31fl3199_cdef, }, - { } +static struct regmap_config is31fl3196_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = IS31FL3196_REG_CNT, + .cache_type = REGCACHE_FLAT, + .readable_reg = is31fl319x_readable_reg, + .volatile_reg = is31fl3196_volatile_reg, + .reg_defaults = is31fl3196_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(is31fl3196_reg_defaults), }; -MODULE_DEVICE_TABLE(of, of_is31fl319x_match); -static int is31fl319x_brightness_set(struct led_classdev *cdev, +static int is31fl3190_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev); + struct is31fl319x_chip *is31 = led->chip; + int chan = led - is31->leds; + int ret; + int i; + u8 ctrl = 0; + + dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness); + + mutex_lock(&is31->lock); + + /* update PWM register */ + ret = regmap_write(is31->regmap, IS31FL3190_PWM(chan), brightness); + if (ret < 0) + goto out; + + /* read current brightness of all PWM channels */ + for (i = 0; i < is31->cdef->num_leds; i++) { + unsigned int pwm_value; + bool on; + + /* + * since neither cdev nor the chip can provide + * the current setting, we read from the regmap cache + */ + + ret = regmap_read(is31->regmap, IS31FL3190_PWM(i), &pwm_value); + on = ret >= 0 && pwm_value > LED_OFF; + + ctrl |= on << i; + } + + if (ctrl > 0) { + dev_dbg(&is31->client->dev, "power up %02x\n", ctrl); + regmap_write(is31->regmap, IS31FL3190_LEDCONTROL, ctrl); + /* update PWMs */ + regmap_write(is31->regmap, IS31FL3190_DATA_UPDATE, 0x00); + /* enable chip from shut down and enable all channels */ + ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x20); + } else { + dev_dbg(&is31->client->dev, "power down\n"); + /* shut down (no need to clear LEDCONTROL) */ + ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01); + } + +out: + mutex_unlock(&is31->lock); + + return ret; +} + +static int is31fl3196_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) { - struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, - cdev); + struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev); struct is31fl319x_chip *is31 = led->chip; int chan = led - is31->leds; int ret; int i; u8 ctrl1 = 0, ctrl2 = 0; - dev_dbg(&is31->client->dev, "%s %d: %d\n", __func__, chan, brightness); + dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness); mutex_lock(&is31->lock); /* update PWM register */ - ret = regmap_write(is31->regmap, IS31FL319X_PWM(chan), brightness); + ret = regmap_write(is31->regmap, IS31FL3196_PWM(chan), brightness); if (ret < 0) goto out; @@ -137,9 +271,7 @@ static int is31fl319x_brightness_set(struct led_classdev *cdev, * the current setting, we read from the regmap cache */ - ret = regmap_read(is31->regmap, IS31FL319X_PWM(i), &pwm_value); - dev_dbg(&is31->client->dev, "%s read %d: ret=%d: %d\n", - __func__, i, ret, pwm_value); + ret = regmap_read(is31->regmap, IS31FL3196_PWM(i), &pwm_value); on = ret >= 0 && pwm_value > LED_OFF; if (i < 3) @@ -153,10 +285,10 @@ static int is31fl319x_brightness_set(struct led_classdev *cdev, if (ctrl1 > 0 || ctrl2 > 0) { dev_dbg(&is31->client->dev, "power up %02x %02x\n", ctrl1, ctrl2); - regmap_write(is31->regmap, IS31FL319X_CTRL1, ctrl1); - regmap_write(is31->regmap, IS31FL319X_CTRL2, ctrl2); + regmap_write(is31->regmap, IS31FL3196_CTRL1, ctrl1); + regmap_write(is31->regmap, IS31FL3196_CTRL2, ctrl2); /* update PWMs */ - regmap_write(is31->regmap, IS31FL319X_DATA_UPDATE, 0x00); + regmap_write(is31->regmap, IS31FL3196_DATA_UPDATE, 0x00); /* enable chip from shut down */ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01); } else { @@ -171,92 +303,141 @@ out: return ret; } -static int is31fl319x_parse_child_dt(const struct device *dev, - const struct device_node *child, - struct is31fl319x_led *led) +static const struct is31fl319x_chipdef is31fl3190_cdef = { + .num_leds = 1, + .reset_reg = IS31FL3190_RESET, + .is31fl319x_regmap_config = &is31fl3190_regmap_config, + .brightness_set = is31fl3190_brightness_set, + .current_default = IS31FL3190_CURRENT_uA_DEFAULT, + .current_min = IS31FL3190_CURRENT_uA_MIN, + .current_max = IS31FL3190_CURRENT_uA_MAX, + .is_3196or3199 = false, +}; + +static const struct is31fl319x_chipdef is31fl3193_cdef = { + .num_leds = 3, + .reset_reg = IS31FL3190_RESET, + .is31fl319x_regmap_config = &is31fl3190_regmap_config, + .brightness_set = is31fl3190_brightness_set, + .current_default = IS31FL3190_CURRENT_uA_DEFAULT, + .current_min = IS31FL3190_CURRENT_uA_MIN, + .current_max = IS31FL3190_CURRENT_uA_MAX, + .is_3196or3199 = false, +}; + +static const struct is31fl319x_chipdef is31fl3196_cdef = { + .num_leds = 6, + .reset_reg = IS31FL3196_RESET, + .is31fl319x_regmap_config = &is31fl3196_regmap_config, + .brightness_set = is31fl3196_brightness_set, + .current_default = IS31FL3196_CURRENT_uA_DEFAULT, + .current_min = IS31FL3196_CURRENT_uA_MIN, + .current_max = IS31FL3196_CURRENT_uA_MAX, + .is_3196or3199 = true, +}; + +static const struct is31fl319x_chipdef is31fl3199_cdef = { + .num_leds = 9, + .reset_reg = IS31FL3196_RESET, + .is31fl319x_regmap_config = &is31fl3196_regmap_config, + .brightness_set = is31fl3196_brightness_set, + .current_default = IS31FL3196_CURRENT_uA_DEFAULT, + .current_min = IS31FL3196_CURRENT_uA_MIN, + .current_max = IS31FL3196_CURRENT_uA_MAX, + .is_3196or3199 = true, +}; + +static const struct of_device_id of_is31fl319x_match[] = { + { .compatible = "issi,is31fl3190", .data = &is31fl3190_cdef, }, + { .compatible = "issi,is31fl3191", .data = &is31fl3190_cdef, }, + { .compatible = "issi,is31fl3193", .data = &is31fl3193_cdef, }, + { .compatible = "issi,is31fl3196", .data = &is31fl3196_cdef, }, + { .compatible = "issi,is31fl3199", .data = &is31fl3199_cdef, }, + { .compatible = "si-en,sn3190", .data = &is31fl3190_cdef, }, + { .compatible = "si-en,sn3191", .data = &is31fl3190_cdef, }, + { .compatible = "si-en,sn3193", .data = &is31fl3193_cdef, }, + { .compatible = "si-en,sn3196", .data = &is31fl3196_cdef, }, + { .compatible = "si-en,sn3199", .data = &is31fl3199_cdef, }, + { } +}; +MODULE_DEVICE_TABLE(of, of_is31fl319x_match); + +static int is31fl319x_parse_child_fw(const struct device *dev, + const struct fwnode_handle *child, + struct is31fl319x_led *led, + struct is31fl319x_chip *is31) { struct led_classdev *cdev = &led->cdev; int ret; - if (of_property_read_string(child, "label", &cdev->name)) - cdev->name = child->name; + if (fwnode_property_read_string(child, "label", &cdev->name)) + cdev->name = fwnode_get_name(child); - ret = of_property_read_string(child, "linux,default-trigger", - &cdev->default_trigger); + ret = fwnode_property_read_string(child, "linux,default-trigger", &cdev->default_trigger); if (ret < 0 && ret != -EINVAL) /* is optional */ return ret; - led->max_microamp = IS31FL319X_CURRENT_DEFAULT; - ret = of_property_read_u32(child, "led-max-microamp", - &led->max_microamp); + led->max_microamp = is31->cdef->current_default; + ret = fwnode_property_read_u32(child, "led-max-microamp", &led->max_microamp); if (!ret) { - if (led->max_microamp < IS31FL319X_CURRENT_MIN) + if (led->max_microamp < is31->cdef->current_min) return -EINVAL; /* not supported */ led->max_microamp = min(led->max_microamp, - IS31FL319X_CURRENT_MAX); + is31->cdef->current_max); } return 0; } -static int is31fl319x_parse_dt(struct device *dev, - struct is31fl319x_chip *is31) +static int is31fl319x_parse_fw(struct device *dev, struct is31fl319x_chip *is31) { - struct device_node *np = dev_of_node(dev), *child; + struct fwnode_handle *fwnode = dev_fwnode(dev), *child; int count; int ret; - if (!np) - return -ENODEV; - - is31->shutdown_gpio = devm_gpiod_get_optional(dev, - "shutdown", - GPIOD_OUT_HIGH); - if (IS_ERR(is31->shutdown_gpio)) { - ret = PTR_ERR(is31->shutdown_gpio); - dev_err(dev, "Failed to get shutdown gpio: %d\n", ret); - return ret; - } + is31->shutdown_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); + if (IS_ERR(is31->shutdown_gpio)) + return dev_err_probe(dev, PTR_ERR(is31->shutdown_gpio), + "Failed to get shutdown gpio\n"); is31->cdef = device_get_match_data(dev); - count = of_get_available_child_count(np); + count = 0; + fwnode_for_each_available_child_node(fwnode, child) + count++; dev_dbg(dev, "probing with %d leds defined in DT\n", count); - if (!count || count > is31->cdef->num_leds) { - dev_err(dev, "Number of leds defined must be between 1 and %u\n", - is31->cdef->num_leds); - return -ENODEV; - } + if (!count || count > is31->cdef->num_leds) + return dev_err_probe(dev, -ENODEV, + "Number of leds defined must be between 1 and %u\n", + is31->cdef->num_leds); - for_each_available_child_of_node(np, child) { + fwnode_for_each_available_child_node(fwnode, child) { struct is31fl319x_led *led; u32 reg; - ret = of_property_read_u32(child, "reg", ®); + ret = fwnode_property_read_u32(child, "reg", ®); if (ret) { - dev_err(dev, "Failed to read led 'reg' property\n"); + ret = dev_err_probe(dev, ret, "Failed to read led 'reg' property\n"); goto put_child_node; } if (reg < 1 || reg > is31->cdef->num_leds) { - dev_err(dev, "invalid led reg %u\n", reg); - ret = -EINVAL; + ret = dev_err_probe(dev, -EINVAL, "invalid led reg %u\n", reg); goto put_child_node; } led = &is31->leds[reg - 1]; if (led->configured) { - dev_err(dev, "led %u is already configured\n", reg); - ret = -EINVAL; + ret = dev_err_probe(dev, -EINVAL, "led %u is already configured\n", reg); goto put_child_node; } - ret = is31fl319x_parse_child_dt(dev, child, led); + ret = is31fl319x_parse_child_fw(dev, child, led, is31); if (ret) { - dev_err(dev, "led %u DT parsing failed\n", reg); + ret = dev_err_probe(dev, ret, "led %u DT parsing failed\n", reg); goto put_child_node; } @@ -264,82 +445,62 @@ static int is31fl319x_parse_dt(struct device *dev, } is31->audio_gain_db = 0; - ret = of_property_read_u32(np, "audio-gain-db", &is31->audio_gain_db); - if (!ret) - is31->audio_gain_db = min(is31->audio_gain_db, - IS31FL319X_AUDIO_GAIN_DB_MAX); + if (is31->cdef->is_3196or3199) { + ret = fwnode_property_read_u32(fwnode, "audio-gain-db", &is31->audio_gain_db); + if (!ret) + is31->audio_gain_db = min(is31->audio_gain_db, + IS31FL3196_AUDIO_GAIN_DB_MAX); + } return 0; put_child_node: - of_node_put(child); + fwnode_handle_put(child); return ret; } -static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg) -{ /* we have no readable registers */ - return false; -} - -static bool is31fl319x_volatile_reg(struct device *dev, unsigned int reg) -{ /* volatile registers are not cached */ - switch (reg) { - case IS31FL319X_DATA_UPDATE: - case IS31FL319X_TIME_UPDATE: - case IS31FL319X_RESET: - return true; /* always write-through */ +static inline int is31fl3190_microamp_to_cs(struct device *dev, u32 microamp) +{ + switch (microamp) { + case 5000: + return IS31FL3190_CURRENT_5_mA; + case 10000: + return IS31FL3190_CURRENT_10_mA; + case 17500: + return IS31FL3190_CURRENT_17dot5_mA; + case 30000: + return IS31FL3190_CURRENT_30_mA; + case 42000: + return IS31FL3190_CURRENT_42_mA; default: - return false; + dev_warn(dev, "Unsupported current value: %d, using 5000 µA!\n", microamp); + return IS31FL3190_CURRENT_5_mA; } } -static const struct reg_default is31fl319x_reg_defaults[] = { - { IS31FL319X_CONFIG1, 0x00}, - { IS31FL319X_CONFIG2, 0x00}, - { IS31FL319X_PWM(0), 0x00}, - { IS31FL319X_PWM(1), 0x00}, - { IS31FL319X_PWM(2), 0x00}, - { IS31FL319X_PWM(3), 0x00}, - { IS31FL319X_PWM(4), 0x00}, - { IS31FL319X_PWM(5), 0x00}, - { IS31FL319X_PWM(6), 0x00}, - { IS31FL319X_PWM(7), 0x00}, - { IS31FL319X_PWM(8), 0x00}, -}; - -static struct regmap_config regmap_config = { - .reg_bits = 8, - .val_bits = 8, - .max_register = IS31FL319X_REG_CNT, - .cache_type = REGCACHE_FLAT, - .readable_reg = is31fl319x_readable_reg, - .volatile_reg = is31fl319x_volatile_reg, - .reg_defaults = is31fl319x_reg_defaults, - .num_reg_defaults = ARRAY_SIZE(is31fl319x_reg_defaults), -}; - -static inline int is31fl319x_microamp_to_cs(struct device *dev, u32 microamp) -{ /* round down to nearest supported value (range check done by caller) */ - u32 step = microamp / IS31FL319X_CURRENT_STEP; +static inline int is31fl3196_microamp_to_cs(struct device *dev, u32 microamp) +{ + /* round down to nearest supported value (range check done by caller) */ + u32 step = microamp / IS31FL3196_CURRENT_uA_STEP; - return ((IS31FL319X_CONFIG2_CS_STEP_REF - step) & - IS31FL319X_CONFIG2_CS_MASK) << - IS31FL319X_CONFIG2_CS_SHIFT; /* CS encoding */ + return ((IS31FL3196_CONFIG2_CS_STEP_REF - step) & + IS31FL3196_CONFIG2_CS_MASK) << + IS31FL3196_CONFIG2_CS_SHIFT; /* CS encoding */ } -static inline int is31fl319x_db_to_gain(u32 dezibel) -{ /* round down to nearest supported value (range check done by caller) */ - return dezibel / IS31FL319X_AUDIO_GAIN_DB_STEP; +static inline int is31fl3196_db_to_gain(u32 dezibel) +{ + /* round down to nearest supported value (range check done by caller) */ + return dezibel / IS31FL3196_AUDIO_GAIN_DB_STEP; } -static int is31fl319x_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int is31fl319x_probe(struct i2c_client *client) { struct is31fl319x_chip *is31; struct device *dev = &client->dev; int err; int i = 0; - u32 aggregated_led_microamp = IS31FL319X_CURRENT_MAX; + u32 aggregated_led_microamp; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -EIO; @@ -349,10 +510,13 @@ static int is31fl319x_probe(struct i2c_client *client, return -ENOMEM; mutex_init(&is31->lock); + err = devm_add_action(dev, (void (*)(void *))mutex_destroy, &is31->lock); + if (err) + return err; - err = is31fl319x_parse_dt(&client->dev, is31); + err = is31fl319x_parse_fw(&client->dev, is31); if (err) - goto free_mutex; + return err; if (is31->shutdown_gpio) { gpiod_direction_output(is31->shutdown_gpio, 0); @@ -361,37 +525,35 @@ static int is31fl319x_probe(struct i2c_client *client, } is31->client = client; - is31->regmap = devm_regmap_init_i2c(client, ®map_config); - if (IS_ERR(is31->regmap)) { - dev_err(&client->dev, "failed to allocate register map\n"); - err = PTR_ERR(is31->regmap); - goto free_mutex; - } + is31->regmap = devm_regmap_init_i2c(client, is31->cdef->is31fl319x_regmap_config); + if (IS_ERR(is31->regmap)) + return dev_err_probe(dev, PTR_ERR(is31->regmap), "failed to allocate register map\n"); i2c_set_clientdata(client, is31); /* check for write-reply from chip (we can't read any registers) */ - err = regmap_write(is31->regmap, IS31FL319X_RESET, 0x00); - if (err < 0) { - dev_err(&client->dev, "no response from chip write: err = %d\n", - err); - err = -EIO; /* does not answer */ - goto free_mutex; - } + err = regmap_write(is31->regmap, is31->cdef->reset_reg, 0x00); + if (err < 0) + return dev_err_probe(dev, err, "no response from chip write\n"); /* * Kernel conventions require per-LED led-max-microamp property. * But the chip does not allow to limit individual LEDs. * So we take minimum from all subnodes for safety of hardware. */ + aggregated_led_microamp = is31->cdef->current_max; for (i = 0; i < is31->cdef->num_leds; i++) if (is31->leds[i].configured && is31->leds[i].max_microamp < aggregated_led_microamp) aggregated_led_microamp = is31->leds[i].max_microamp; - regmap_write(is31->regmap, IS31FL319X_CONFIG2, - is31fl319x_microamp_to_cs(dev, aggregated_led_microamp) | - is31fl319x_db_to_gain(is31->audio_gain_db)); + if (is31->cdef->is_3196or3199) + regmap_write(is31->regmap, IS31FL3196_CONFIG2, + is31fl3196_microamp_to_cs(dev, aggregated_led_microamp) | + is31fl3196_db_to_gain(is31->audio_gain_db)); + else + regmap_update_bits(is31->regmap, IS31FL3190_CURRENT, IS31FL3190_CURRENT_MASK, + is31fl3190_microamp_to_cs(dev, aggregated_led_microamp)); for (i = 0; i < is31->cdef->num_leds; i++) { struct is31fl319x_led *led = &is31->leds[i]; @@ -400,26 +562,14 @@ static int is31fl319x_probe(struct i2c_client *client, continue; led->chip = is31; - led->cdev.brightness_set_blocking = is31fl319x_brightness_set; + led->cdev.brightness_set_blocking = is31->cdef->brightness_set; err = devm_led_classdev_register(&client->dev, &led->cdev); if (err < 0) - goto free_mutex; + return err; } return 0; - -free_mutex: - mutex_destroy(&is31->lock); - return err; -} - -static int is31fl319x_remove(struct i2c_client *client) -{ - struct is31fl319x_chip *is31 = i2c_get_clientdata(client); - - mutex_destroy(&is31->lock); - return 0; } /* @@ -432,6 +582,10 @@ static const struct i2c_device_id is31fl319x_id[] = { { "is31fl3193" }, { "is31fl3196" }, { "is31fl3199" }, + { "sn3190" }, + { "sn3191" }, + { "sn3193" }, + { "sn3196" }, { "sn3199" }, {}, }; @@ -440,10 +594,9 @@ MODULE_DEVICE_TABLE(i2c, is31fl319x_id); static struct i2c_driver is31fl319x_driver = { .driver = { .name = "leds-is31fl319x", - .of_match_table = of_match_ptr(of_is31fl319x_match), + .of_match_table = of_is31fl319x_match, }, - .probe = is31fl319x_probe, - .remove = is31fl319x_remove, + .probe_new = is31fl319x_probe, .id_table = is31fl319x_id, }; diff --git a/drivers/leds/leds-turris-omnia.c b/drivers/leds/leds-turris-omnia.c index 1adfed1c0619..eac6f4a573b2 100644 --- a/drivers/leds/leds-turris-omnia.c +++ b/drivers/leds/leds-turris-omnia.c @@ -239,9 +239,6 @@ static int omnia_leds_probe(struct i2c_client *client, led += ret; } - if (devm_device_add_groups(dev, omnia_led_controller_groups)) - dev_warn(dev, "Could not add attribute group!\n"); - return 0; } @@ -283,6 +280,7 @@ static struct i2c_driver omnia_leds_driver = { .driver = { .name = "leds-turris-omnia", .of_match_table = of_omnia_leds_match, + .dev_groups = omnia_led_controller_groups, }, }; diff --git a/drivers/leds/rgb/leds-pwm-multicolor.c b/drivers/leds/rgb/leds-pwm-multicolor.c index 45e38708ecb1..da9d2218ae18 100644 --- a/drivers/leds/rgb/leds-pwm-multicolor.c +++ b/drivers/leds/rgb/leds-pwm-multicolor.c @@ -19,6 +19,7 @@ struct pwm_led { struct pwm_device *pwm; struct pwm_state state; + bool active_low; }; struct pwm_mc_led { @@ -45,6 +46,9 @@ static int led_pwm_mc_set(struct led_classdev *cdev, duty *= mc_cdev->subled_info[i].brightness; do_div(duty, cdev->max_brightness); + if (priv->leds[i].active_low) + duty = priv->leds[i].state.period - duty; + priv->leds[i].state.duty_cycle = duty; priv->leds[i].state.enabled = duty > 0; ret = pwm_apply_state(priv->leds[i].pwm, @@ -72,11 +76,11 @@ static int iterate_subleds(struct device *dev, struct pwm_mc_led *priv, pwmled = &priv->leds[priv->mc_cdev.num_colors]; pwmled->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL); if (IS_ERR(pwmled->pwm)) { - ret = PTR_ERR(pwmled->pwm); - dev_err(dev, "unable to request PWM: %d\n", ret); + ret = dev_err_probe(dev, PTR_ERR(pwmled->pwm), "unable to request PWM\n"); goto release_fwnode; } pwm_init_state(pwmled->pwm, &pwmled->state); + pwmled->active_low = fwnode_property_read_bool(fwnode, "active-low"); ret = fwnode_property_read_u32(fwnode, "color", &color); if (ret) { diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c index b10239d6ef93..02922073c9ef 100644 --- a/drivers/mailbox/imx-mailbox.c +++ b/drivers/mailbox/imx-mailbox.c @@ -19,13 +19,15 @@ #include <linux/suspend.h> #include <linux/slab.h> -#define IMX_MU_CHANS 16 +#define IMX_MU_CHANS 17 /* TX0/RX0/RXDB[0-3] */ #define IMX_MU_SCU_CHANS 6 /* TX0/RX0 */ #define IMX_MU_S4_CHANS 2 #define IMX_MU_CHAN_NAME_SIZE 20 +#define IMX_MU_NUM_RR 4 + #define IMX_MU_SECO_TX_TOUT (msecs_to_jiffies(3000)) #define IMX_MU_SECO_RX_TOUT (msecs_to_jiffies(3000)) @@ -35,9 +37,11 @@ enum imx_mu_chan_type { IMX_MU_TYPE_RX = 1, /* Rx */ IMX_MU_TYPE_TXDB = 2, /* Tx doorbell */ IMX_MU_TYPE_RXDB = 3, /* Rx doorbell */ + IMX_MU_TYPE_RST = 4, /* Reset */ }; enum imx_mu_xcr { + IMX_MU_CR, IMX_MU_GIER, IMX_MU_GCR, IMX_MU_TCR, @@ -50,6 +54,7 @@ enum imx_mu_xsr { IMX_MU_GSR, IMX_MU_TSR, IMX_MU_RSR, + IMX_MU_xSR_MAX, }; struct imx_sc_rpc_msg_max { @@ -85,7 +90,7 @@ struct imx_mu_priv { int irq[IMX_MU_CHANS]; bool suspend; - u32 xcr[4]; + u32 xcr[IMX_MU_xCR_MAX]; bool side_b; }; @@ -105,8 +110,8 @@ struct imx_mu_dcfg { enum imx_mu_type type; u32 xTR; /* Transmit Register0 */ u32 xRR; /* Receive Register0 */ - u32 xSR[4]; /* Status Registers */ - u32 xCR[4]; /* Control Registers */ + u32 xSR[IMX_MU_xSR_MAX]; /* Status Registers */ + u32 xCR[IMX_MU_xCR_MAX]; /* Control Registers */ }; #define IMX_MU_xSR_GIPn(type, x) (type & IMX_MU_V2 ? BIT(x) : BIT(28 + (3 - (x)))) @@ -121,6 +126,9 @@ struct imx_mu_dcfg { #define IMX_MU_xCR_TIEn(type, x) (type & IMX_MU_V2 ? BIT(x) : BIT(20 + (3 - (x)))) /* General Purpose Interrupt Request */ #define IMX_MU_xCR_GIRn(type, x) (type & IMX_MU_V2 ? BIT(x) : BIT(16 + (3 - (x)))) +/* MU reset */ +#define IMX_MU_xCR_RST(type) (type & IMX_MU_V2 ? BIT(0) : BIT(5)) +#define IMX_MU_xSR_RST(type) (type & IMX_MU_V2 ? BIT(0) : BIT(7)) static struct imx_mu_priv *to_imx_mu_priv(struct mbox_controller *mbox) @@ -497,6 +505,8 @@ static irqreturn_t imx_mu_isr(int irq, void *p) val &= IMX_MU_xSR_GIPn(priv->dcfg->type, cp->idx) & (ctrl & IMX_MU_xCR_GIEn(priv->dcfg->type, cp->idx)); break; + case IMX_MU_TYPE_RST: + return IRQ_NONE; default: dev_warn_ratelimited(priv->dev, "Unhandled channel type %d\n", cp->type); @@ -581,6 +591,8 @@ static void imx_mu_shutdown(struct mbox_chan *chan) { struct imx_mu_priv *priv = to_imx_mu_priv(chan->mbox); struct imx_mu_con_priv *cp = chan->con_priv; + int ret; + u32 sr; if (cp->type == IMX_MU_TYPE_TXDB) { tasklet_kill(&cp->txdb_tasklet); @@ -598,6 +610,13 @@ static void imx_mu_shutdown(struct mbox_chan *chan) case IMX_MU_TYPE_RXDB: imx_mu_xcr_rmw(priv, IMX_MU_GIER, 0, IMX_MU_xCR_GIEn(priv->dcfg->type, cp->idx)); break; + case IMX_MU_TYPE_RST: + imx_mu_xcr_rmw(priv, IMX_MU_CR, IMX_MU_xCR_RST(priv->dcfg->type), 0); + ret = readl_poll_timeout(priv->base + priv->dcfg->xSR[IMX_MU_SR], sr, + !(sr & IMX_MU_xSR_RST(priv->dcfg->type)), 1, 5); + if (ret) + dev_warn(priv->dev, "RST channel timeout\n"); + break; default: break; } @@ -694,6 +713,7 @@ static struct mbox_chan *imx_mu_seco_xlate(struct mbox_controller *mbox, static void imx_mu_init_generic(struct imx_mu_priv *priv) { unsigned int i; + unsigned int val; for (i = 0; i < IMX_MU_CHANS; i++) { struct imx_mu_con_priv *cp = &priv->con_priv[i]; @@ -715,6 +735,14 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv) /* Set default MU configuration */ for (i = 0; i < IMX_MU_xCR_MAX; i++) imx_mu_write(priv, 0, priv->dcfg->xCR[i]); + + /* Clear any pending GIP */ + val = imx_mu_read(priv, priv->dcfg->xSR[IMX_MU_GSR]); + imx_mu_write(priv, val, priv->dcfg->xSR[IMX_MU_GSR]); + + /* Clear any pending RSR */ + for (i = 0; i < IMX_MU_NUM_RR; i++) + imx_mu_read(priv, priv->dcfg->xRR + (i % 4) * 4); } static void imx_mu_init_specific(struct imx_mu_priv *priv) @@ -865,7 +893,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx6sx = { .xTR = 0x0, .xRR = 0x10, .xSR = {0x20, 0x20, 0x20, 0x20}, - .xCR = {0x24, 0x24, 0x24, 0x24}, + .xCR = {0x24, 0x24, 0x24, 0x24, 0x24}, }; static const struct imx_mu_dcfg imx_mu_cfg_imx7ulp = { @@ -888,7 +916,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp = { .xTR = 0x200, .xRR = 0x280, .xSR = {0xC, 0x118, 0x124, 0x12C}, - .xCR = {0x110, 0x114, 0x120, 0x128}, + .xCR = {0x8, 0x110, 0x114, 0x120, 0x128}, }; static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp_s4 = { diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 2578e5aaa935..9465f9081515 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -192,15 +192,10 @@ static bool cmdq_thread_is_in_wfe(struct cmdq_thread *thread) static void cmdq_task_exec_done(struct cmdq_task *task, int sta) { - struct cmdq_task_cb *cb = &task->pkt->async_cb; struct cmdq_cb_data data; data.sta = sta; - data.data = cb->data; data.pkt = task->pkt; - if (cb->cb) - cb->cb(data); - mbox_chan_received_data(task->thread->chan, &data); list_del(&task->list_entry); @@ -448,7 +443,6 @@ done: static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) { struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv; - struct cmdq_task_cb *cb; struct cmdq_cb_data data; struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); struct cmdq_task *task, *tmp; @@ -465,13 +459,8 @@ static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) list_for_each_entry_safe(task, tmp, &thread->task_busy_list, list_entry) { - cb = &task->pkt->async_cb; data.sta = -ECONNABORTED; - data.data = cb->data; data.pkt = task->pkt; - if (cb->cb) - cb->cb(data); - mbox_chan_received_data(task->thread->chan, &data); list_del(&task->list_entry); kfree(task); diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index d170c88359fe..7bc92923104c 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1024,6 +1024,7 @@ int __init early_init_dt_scan_chosen_stdout(void) int l; const struct earlycon_id *match; const void *fdt = initial_boot_params; + int ret; offset = fdt_path_offset(fdt, "/chosen"); if (offset < 0) @@ -1056,7 +1057,8 @@ int __init early_init_dt_scan_chosen_stdout(void) if (fdt_node_check_compatible(fdt, offset, match->compatible)) continue; - if (of_setup_earlycon(match, offset, options) == 0) + ret = of_setup_earlycon(match, offset, options); + if (!ret || ret == -EALREADY) return 0; } return -ENODEV; diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index afb2d373dd47..81e7f64c1739 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -12,7 +12,7 @@ * (non hardware specific) changes to serial.c. * * The port is registered with the tty driver as minor device 64, and - * therefore other ports should should only use 65 upwards. + * therefore other ports should only use 65 upwards. * * Richard Lucock 28/12/99 * @@ -51,6 +51,7 @@ #include <linux/seq_file.h> #include <linux/serial.h> #include <linux/serial_reg.h> +#include <linux/serial_core.h> #include <linux/sched.h> #include <linux/signal.h> #include <linux/slab.h> @@ -283,12 +284,12 @@ static void transmit_chars(struct serial_state *info) amiga_custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100; mb(); - info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1); + info->xmit.tail = info->xmit.tail & (UART_XMIT_SIZE - 1); info->icount.tx++; if (CIRC_CNT(info->xmit.head, info->xmit.tail, - SERIAL_XMIT_SIZE) < WAKEUP_CHARS) + UART_XMIT_SIZE) < WAKEUP_CHARS) tty_wakeup(info->tport.tty); #ifdef SERIAL_DEBUG_INTR @@ -708,13 +709,13 @@ static int rs_put_char(struct tty_struct *tty, unsigned char ch) local_irq_save(flags); if (CIRC_SPACE(info->xmit.head, info->xmit.tail, - SERIAL_XMIT_SIZE) == 0) { + UART_XMIT_SIZE) == 0) { local_irq_restore(flags); return 0; } info->xmit.buf[info->xmit.head++] = ch; - info->xmit.head &= SERIAL_XMIT_SIZE-1; + info->xmit.head &= UART_XMIT_SIZE - 1; local_irq_restore(flags); return 1; } @@ -753,15 +754,14 @@ static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count while (1) { c = CIRC_SPACE_TO_END(info->xmit.head, info->xmit.tail, - SERIAL_XMIT_SIZE); + UART_XMIT_SIZE); if (count < c) c = count; if (c <= 0) { break; } memcpy(info->xmit.buf + info->xmit.head, buf, c); - info->xmit.head = ((info->xmit.head + c) & - (SERIAL_XMIT_SIZE-1)); + info->xmit.head = (info->xmit.head + c) & (UART_XMIT_SIZE - 1); buf += c; count -= c; ret += c; @@ -788,14 +788,14 @@ static unsigned int rs_write_room(struct tty_struct *tty) { struct serial_state *info = tty->driver_data; - return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); + return CIRC_SPACE(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE); } static unsigned int rs_chars_in_buffer(struct tty_struct *tty) { struct serial_state *info = tty->driver_data; - return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); + return CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE); } static void rs_flush_buffer(struct tty_struct *tty) diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c index 31dceb5039b5..e81701a66429 100644 --- a/drivers/tty/mips_ejtag_fdc.c +++ b/drivers/tty/mips_ejtag_fdc.c @@ -916,7 +916,7 @@ static int mips_ejtag_fdc_tty_probe(struct mips_cdmm_device *dev) mips_ejtag_fdc_write(priv, REG_FDCFG, cfg); /* Make each port's xmit FIFO big enough to fill FDC TX FIFO */ - priv->xmit_size = min(tx_fifo * 4, (unsigned int)SERIAL_XMIT_SIZE); + priv->xmit_size = min(tx_fifo * 4, (unsigned int)UART_XMIT_SIZE); driver = tty_alloc_driver(NUM_TTY_CHANNELS, TTY_DRIVER_REAL_RAW); if (IS_ERR(driver)) @@ -1222,7 +1222,7 @@ static void kgdbfdc_push_one(void) /* Construct a word from any data in buffer */ word = mips_ejtag_fdc_encode(bufs, &kgdbfdc_wbuflen, 1); - /* Relocate any remaining data to beginnning of buffer */ + /* Relocate any remaining data to beginning of buffer */ kgdbfdc_wbuflen -= word.bytes; for (i = 0; i < kgdbfdc_wbuflen; ++i) kgdbfdc_wbuf[i] = kgdbfdc_wbuf[i + word.bytes]; diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index fd4d24f61c46..caa5c14ed57f 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -5,6 +5,14 @@ * * * THIS IS A DEVELOPMENT SNAPSHOT IT IS NOT A FINAL RELEASE * * + * Outgoing path: + * tty -> DLCI fifo -> scheduler -> GSM MUX data queue ---o-> ldisc + * control message -> GSM MUX control queue --´ + * + * Incoming path: + * ldisc -> gsm_queue() -o--> tty + * `-> gsm_control_response() + * * TO DO: * Mostly done: ioctls for setting modes/timing * Partly done: hooks so you can pull off frames to non tty devs @@ -210,6 +218,9 @@ struct gsm_mux { /* Events on the GSM channel */ wait_queue_head_t event; + /* ldisc send work */ + struct work_struct tx_work; + /* Bits for GSM mode decoding */ /* Framing Layer */ @@ -235,14 +246,17 @@ struct gsm_mux { struct gsm_dlci *dlci[NUM_DLCI]; int old_c_iflag; /* termios c_iflag value before attach */ bool constipated; /* Asked by remote to shut up */ + bool has_devices; /* Devices were registered */ spinlock_t tx_lock; unsigned int tx_bytes; /* TX data outstanding */ #define TX_THRESH_HI 8192 #define TX_THRESH_LO 2048 - struct list_head tx_list; /* Pending data packets */ + struct list_head tx_ctrl_list; /* Pending control packets */ + struct list_head tx_data_list; /* Pending data packets */ /* Control messages */ + struct timer_list kick_timer; /* Kick TX queuing on timeout */ struct timer_list t2_timer; /* Retransmit timer for commands */ int cretries; /* Command retry counter */ struct gsm_control *pending_cmd;/* Our current pending command */ @@ -369,6 +383,11 @@ static const u8 gsm_fcs8[256] = { static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len); static int gsm_modem_update(struct gsm_dlci *dlci, u8 brk); +static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len, + u8 ctrl); +static int gsm_send_packet(struct gsm_mux *gsm, struct gsm_msg *msg); +static void gsmld_write_trigger(struct gsm_mux *gsm); +static void gsmld_write_task(struct work_struct *work); /** * gsm_fcs_add - update FCS @@ -420,6 +439,27 @@ static int gsm_read_ea(unsigned int *val, u8 c) } /** + * gsm_read_ea_val - read a value until EA + * @val: variable holding value + * @data: buffer of data + * @dlen: length of data + * + * Processes an EA value. Updates the passed variable and + * returns the processed data length. + */ +static unsigned int gsm_read_ea_val(unsigned int *val, const u8 *data, int dlen) +{ + unsigned int len = 0; + + for (; dlen > 0; dlen--) { + len++; + if (gsm_read_ea(val, *data++)) + break; + } + return len; +} + +/** * gsm_encode_modem - encode modem data bits * @dlci: DLCI to encode from * @@ -464,6 +504,68 @@ static void gsm_hex_dump_bytes(const char *fname, const u8 *data, } /** + * gsm_register_devices - register all tty devices for a given mux index + * + * @driver: the tty driver that describes the tty devices + * @index: the mux number is used to calculate the minor numbers of the + * ttys for this mux and may differ from the position in the + * mux array. + */ +static int gsm_register_devices(struct tty_driver *driver, unsigned int index) +{ + struct device *dev; + int i; + unsigned int base; + + if (!driver || index >= MAX_MUX) + return -EINVAL; + + base = index * NUM_DLCI; /* first minor for this index */ + for (i = 1; i < NUM_DLCI; i++) { + /* Don't register device 0 - this is the control channel + * and not a usable tty interface + */ + dev = tty_register_device(gsm_tty_driver, base + i, NULL); + if (IS_ERR(dev)) { + if (debug & 8) + pr_info("%s failed to register device minor %u", + __func__, base + i); + for (i--; i >= 1; i--) + tty_unregister_device(gsm_tty_driver, base + i); + return PTR_ERR(dev); + } + } + + return 0; +} + +/** + * gsm_unregister_devices - unregister all tty devices for a given mux index + * + * @driver: the tty driver that describes the tty devices + * @index: the mux number is used to calculate the minor numbers of the + * ttys for this mux and may differ from the position in the + * mux array. + */ +static void gsm_unregister_devices(struct tty_driver *driver, + unsigned int index) +{ + int i; + unsigned int base; + + if (!driver || index >= MAX_MUX) + return; + + base = index * NUM_DLCI; /* first minor for this index */ + for (i = 1; i < NUM_DLCI; i++) { + /* Don't unregister device 0 - this is the control + * channel and not a usable tty interface + */ + tty_unregister_device(gsm_tty_driver, base + i); + } +} + +/** * gsm_print_packet - display a frame for debug * @hdr: header to print before decode * @addr: address EA from the frame @@ -570,57 +672,73 @@ static int gsm_stuff_frame(const u8 *input, u8 *output, int len) * @cr: command/response bit seen as initiator * @control: control byte including PF bit * - * Format up and transmit a control frame. These do not go via the - * queueing logic as they should be transmitted ahead of data when - * they are needed. - * - * FIXME: Lock versus data TX path + * Format up and transmit a control frame. These should be transmitted + * ahead of data when they are needed. */ - -static void gsm_send(struct gsm_mux *gsm, int addr, int cr, int control) +static int gsm_send(struct gsm_mux *gsm, int addr, int cr, int control) { - int len; - u8 cbuf[10]; - u8 ibuf[3]; + struct gsm_msg *msg; + u8 *dp; int ocr; + unsigned long flags; + + msg = gsm_data_alloc(gsm, addr, 0, control); + if (!msg) + return -ENOMEM; /* toggle C/R coding if not initiator */ ocr = cr ^ (gsm->initiator ? 0 : 1); - switch (gsm->encoding) { - case 0: - cbuf[0] = GSM0_SOF; - cbuf[1] = (addr << 2) | (ocr << 1) | EA; - cbuf[2] = control; - cbuf[3] = EA; /* Length of data = 0 */ - cbuf[4] = 0xFF - gsm_fcs_add_block(INIT_FCS, cbuf + 1, 3); - cbuf[5] = GSM0_SOF; - len = 6; - break; - case 1: - case 2: - /* Control frame + packing (but not frame stuffing) in mode 1 */ - ibuf[0] = (addr << 2) | (ocr << 1) | EA; - ibuf[1] = control; - ibuf[2] = 0xFF - gsm_fcs_add_block(INIT_FCS, ibuf, 2); - /* Stuffing may double the size worst case */ - len = gsm_stuff_frame(ibuf, cbuf + 1, 3); - /* Now add the SOF markers */ - cbuf[0] = GSM1_SOF; - cbuf[len + 1] = GSM1_SOF; - /* FIXME: we can omit the lead one in many cases */ - len += 2; - break; - default: - WARN_ON(1); - return; - } - gsmld_output(gsm, cbuf, len); - if (!gsm->initiator) { - cr = cr & gsm->initiator; - control = control & ~PF; + msg->data -= 3; + dp = msg->data; + *dp++ = (addr << 2) | (ocr << 1) | EA; + *dp++ = control; + + if (gsm->encoding == 0) + *dp++ = EA; /* Length of data = 0 */ + + *dp = 0xFF - gsm_fcs_add_block(INIT_FCS, msg->data, dp - msg->data); + msg->len = (dp - msg->data) + 1; + + gsm_print_packet("Q->", addr, cr, control, NULL, 0); + + spin_lock_irqsave(&gsm->tx_lock, flags); + list_add_tail(&msg->list, &gsm->tx_ctrl_list); + gsm->tx_bytes += msg->len; + spin_unlock_irqrestore(&gsm->tx_lock, flags); + gsmld_write_trigger(gsm); + + return 0; +} + +/** + * gsm_dlci_clear_queues - remove outstanding data for a DLCI + * @gsm: mux + * @dlci: clear for this DLCI + * + * Clears the data queues for a given DLCI. + */ +static void gsm_dlci_clear_queues(struct gsm_mux *gsm, struct gsm_dlci *dlci) +{ + struct gsm_msg *msg, *nmsg; + int addr = dlci->addr; + unsigned long flags; + + /* Clear DLCI write fifo first */ + spin_lock_irqsave(&dlci->lock, flags); + kfifo_reset(&dlci->fifo); + spin_unlock_irqrestore(&dlci->lock, flags); + + /* Clear data packets in MUX write queue */ + spin_lock_irqsave(&gsm->tx_lock, flags); + list_for_each_entry_safe(msg, nmsg, &gsm->tx_data_list, list) { + if (msg->addr != addr) + continue; + gsm->tx_bytes -= msg->len; + list_del(&msg->list); + kfree(msg); } - gsm_print_packet("-->", addr, cr, control, NULL, 0); + spin_unlock_irqrestore(&gsm->tx_lock, flags); } /** @@ -683,59 +801,151 @@ static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len, } /** - * gsm_data_kick - poke the queue + * gsm_send_packet - sends a single packet * @gsm: GSM Mux - * @dlci: DLCI sending the data + * @msg: packet to send * - * The tty device has called us to indicate that room has appeared in - * the transmit queue. Ram more data into the pipe if we have any - * If we have been flow-stopped by a CMD_FCOFF, then we can only - * send messages on DLCI0 until CMD_FCON + * The given packet is encoded and sent out. No memory is freed. + * The caller must hold the gsm tx lock. + */ +static int gsm_send_packet(struct gsm_mux *gsm, struct gsm_msg *msg) +{ + int len, ret; + + + if (gsm->encoding == 0) { + gsm->txframe[0] = GSM0_SOF; + memcpy(gsm->txframe + 1, msg->data, msg->len); + gsm->txframe[msg->len + 1] = GSM0_SOF; + len = msg->len + 2; + } else { + gsm->txframe[0] = GSM1_SOF; + len = gsm_stuff_frame(msg->data, gsm->txframe + 1, msg->len); + gsm->txframe[len + 1] = GSM1_SOF; + len += 2; + } + + if (debug & 4) + gsm_hex_dump_bytes(__func__, gsm->txframe, len); + gsm_print_packet("-->", msg->addr, gsm->initiator, msg->ctrl, msg->data, + msg->len); + + ret = gsmld_output(gsm, gsm->txframe, len); + if (ret <= 0) + return ret; + /* FIXME: Can eliminate one SOF in many more cases */ + gsm->tx_bytes -= msg->len; + + return 0; +} + +/** + * gsm_is_flow_ctrl_msg - checks if flow control message + * @msg: message to check * - * FIXME: lock against link layer control transmissions + * Returns true if the given message is a flow control command of the + * control channel. False is returned in any other case. */ +static bool gsm_is_flow_ctrl_msg(struct gsm_msg *msg) +{ + unsigned int cmd; + + if (msg->addr > 0) + return false; + + switch (msg->ctrl & ~PF) { + case UI: + case UIH: + cmd = 0; + if (gsm_read_ea_val(&cmd, msg->data + 2, msg->len - 2) < 1) + break; + switch (cmd & ~PF) { + case CMD_FCOFF: + case CMD_FCON: + return true; + } + break; + } + + return false; +} -static void gsm_data_kick(struct gsm_mux *gsm, struct gsm_dlci *dlci) +/** + * gsm_data_kick - poke the queue + * @gsm: GSM Mux + * + * The tty device has called us to indicate that room has appeared in + * the transmit queue. Ram more data into the pipe if we have any. + * If we have been flow-stopped by a CMD_FCOFF, then we can only + * send messages on DLCI0 until CMD_FCON. The caller must hold + * the gsm tx lock. + */ +static int gsm_data_kick(struct gsm_mux *gsm) { struct gsm_msg *msg, *nmsg; - int len; + struct gsm_dlci *dlci; + int ret; - list_for_each_entry_safe(msg, nmsg, &gsm->tx_list, list) { - if (gsm->constipated && msg->addr) - continue; - if (gsm->encoding != 0) { - gsm->txframe[0] = GSM1_SOF; - len = gsm_stuff_frame(msg->data, - gsm->txframe + 1, msg->len); - gsm->txframe[len + 1] = GSM1_SOF; - len += 2; - } else { - gsm->txframe[0] = GSM0_SOF; - memcpy(gsm->txframe + 1 , msg->data, msg->len); - gsm->txframe[msg->len + 1] = GSM0_SOF; - len = msg->len + 2; - } + clear_bit(TTY_DO_WRITE_WAKEUP, &gsm->tty->flags); - if (debug & 4) - gsm_hex_dump_bytes(__func__, gsm->txframe, len); - if (gsmld_output(gsm, gsm->txframe, len) <= 0) + /* Serialize control messages and control channel messages first */ + list_for_each_entry_safe(msg, nmsg, &gsm->tx_ctrl_list, list) { + if (gsm->constipated && !gsm_is_flow_ctrl_msg(msg)) + continue; + ret = gsm_send_packet(gsm, msg); + switch (ret) { + case -ENOSPC: + return -ENOSPC; + case -ENODEV: + /* ldisc not open */ + gsm->tx_bytes -= msg->len; + list_del(&msg->list); + kfree(msg); + continue; + default: + if (ret >= 0) { + list_del(&msg->list); + kfree(msg); + } break; - /* FIXME: Can eliminate one SOF in many more cases */ - gsm->tx_bytes -= msg->len; - - list_del(&msg->list); - kfree(msg); + } + } - if (dlci) { - tty_port_tty_wakeup(&dlci->port); - } else { - int i = 0; + if (gsm->constipated) + return -EAGAIN; - for (i = 0; i < NUM_DLCI; i++) - if (gsm->dlci[i]) - tty_port_tty_wakeup(&gsm->dlci[i]->port); + /* Serialize other channels */ + if (list_empty(&gsm->tx_data_list)) + return 0; + list_for_each_entry_safe(msg, nmsg, &gsm->tx_data_list, list) { + dlci = gsm->dlci[msg->addr]; + /* Send only messages for DLCIs with valid state */ + if (dlci->state != DLCI_OPEN) { + gsm->tx_bytes -= msg->len; + list_del(&msg->list); + kfree(msg); + continue; + } + ret = gsm_send_packet(gsm, msg); + switch (ret) { + case -ENOSPC: + return -ENOSPC; + case -ENODEV: + /* ldisc not open */ + gsm->tx_bytes -= msg->len; + list_del(&msg->list); + kfree(msg); + continue; + default: + if (ret >= 0) { + list_del(&msg->list); + kfree(msg); + } + break; } } + + return 1; } /** @@ -784,9 +994,22 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg) msg->data = dp; /* Add to the actual output queue */ - list_add_tail(&msg->list, &gsm->tx_list); + switch (msg->ctrl & ~PF) { + case UI: + case UIH: + if (msg->addr > 0) { + list_add_tail(&msg->list, &gsm->tx_data_list); + break; + } + fallthrough; + default: + list_add_tail(&msg->list, &gsm->tx_ctrl_list); + break; + } gsm->tx_bytes += msg->len; - gsm_data_kick(gsm, dlci); + + gsmld_write_trigger(gsm); + mod_timer(&gsm->kick_timer, jiffies + 10 * gsm->t1 * HZ / 100); } /** @@ -823,41 +1046,48 @@ static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci) { struct gsm_msg *msg; u8 *dp; - int len, total_size, size; - int h = dlci->adaption - 1; + int h, len, size; - total_size = 0; - while (1) { - len = kfifo_len(&dlci->fifo); - if (len == 0) - return total_size; - - /* MTU/MRU count only the data bits */ - if (len > gsm->mtu) - len = gsm->mtu; - - size = len + h; - - msg = gsm_data_alloc(gsm, dlci->addr, size, gsm->ftype); - /* FIXME: need a timer or something to kick this so it can't - get stuck with no work outstanding and no buffer free */ - if (msg == NULL) - return -ENOMEM; - dp = msg->data; - switch (dlci->adaption) { - case 1: /* Unstructured */ - break; - case 2: /* Unstructed with modem bits. - Always one byte as we never send inline break data */ - *dp++ = (gsm_encode_modem(dlci) << 1) | EA; - break; - } - WARN_ON(kfifo_out_locked(&dlci->fifo, dp , len, &dlci->lock) != len); - __gsm_data_queue(dlci, msg); - total_size += size; + /* for modem bits without break data */ + h = ((dlci->adaption == 1) ? 0 : 1); + + len = kfifo_len(&dlci->fifo); + if (len == 0) + return 0; + + /* MTU/MRU count only the data bits but watch adaption mode */ + if ((len + h) > gsm->mtu) + len = gsm->mtu - h; + + size = len + h; + + msg = gsm_data_alloc(gsm, dlci->addr, size, gsm->ftype); + if (!msg) + return -ENOMEM; + dp = msg->data; + switch (dlci->adaption) { + case 1: /* Unstructured */ + break; + case 2: /* Unstructured with modem bits. + * Always one byte as we never send inline break data + */ + *dp++ = (gsm_encode_modem(dlci) << 1) | EA; + break; + default: + pr_err("%s: unsupported adaption %d\n", __func__, + dlci->adaption); + break; } + + WARN_ON(len != kfifo_out_locked(&dlci->fifo, dp, len, + &dlci->lock)); + + /* Notify upper layer about available send space. */ + tty_port_tty_wakeup(&dlci->port); + + __gsm_data_queue(dlci, msg); /* Bytes of data we used up */ - return total_size; + return size; } /** @@ -908,9 +1138,6 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, size = len + overhead; msg = gsm_data_alloc(gsm, dlci->addr, size, gsm->ftype); - - /* FIXME: need a timer or something to kick this so it can't - get stuck with no work outstanding and no buffer free */ if (msg == NULL) { skb_queue_tail(&dlci->skb_list, dlci->skb); dlci->skb = NULL; @@ -1006,32 +1233,43 @@ static int gsm_dlci_modem_output(struct gsm_mux *gsm, struct gsm_dlci *dlci, * renegotiate DLCI priorities with optional stuff. Needs optimising. */ -static void gsm_dlci_data_sweep(struct gsm_mux *gsm) +static int gsm_dlci_data_sweep(struct gsm_mux *gsm) { - int len; /* Priority ordering: We should do priority with RR of the groups */ - int i = 1; - - while (i < NUM_DLCI) { - struct gsm_dlci *dlci; + int i, len, ret = 0; + bool sent; + struct gsm_dlci *dlci; - if (gsm->tx_bytes > TX_THRESH_HI) - break; - dlci = gsm->dlci[i]; - if (dlci == NULL || dlci->constipated) { - i++; - continue; + while (gsm->tx_bytes < TX_THRESH_HI) { + for (sent = false, i = 1; i < NUM_DLCI; i++) { + dlci = gsm->dlci[i]; + /* skip unused or blocked channel */ + if (!dlci || dlci->constipated) + continue; + /* skip channels with invalid state */ + if (dlci->state != DLCI_OPEN) + continue; + /* count the sent data per adaption */ + if (dlci->adaption < 3 && !dlci->net) + len = gsm_dlci_data_output(gsm, dlci); + else + len = gsm_dlci_data_output_framed(gsm, dlci); + /* on error exit */ + if (len < 0) + return ret; + if (len > 0) { + ret++; + sent = true; + /* The lower DLCs can starve the higher DLCs! */ + break; + } + /* try next */ } - if (dlci->adaption < 3 && !dlci->net) - len = gsm_dlci_data_output(gsm, dlci); - else - len = gsm_dlci_data_output_framed(gsm, dlci); - if (len < 0) + if (!sent) break; - /* DLCI empty - try the next */ - if (len == 0) - i++; - } + }; + + return ret; } /** @@ -1277,7 +1515,6 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, const u8 *data, int clen) { u8 buf[1]; - unsigned long flags; switch (command) { case CMD_CLD: { @@ -1299,9 +1536,7 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, gsm->constipated = false; gsm_control_reply(gsm, CMD_FCON, NULL, 0); /* Kick the link in case it is idling */ - spin_lock_irqsave(&gsm->tx_lock, flags); - gsm_data_kick(gsm, NULL); - spin_unlock_irqrestore(&gsm->tx_lock, flags); + gsmld_write_trigger(gsm); break; case CMD_FCOFF: /* Modem wants us to STFU */ @@ -1407,7 +1642,7 @@ static void gsm_control_retransmit(struct timer_list *t) spin_lock_irqsave(&gsm->control_lock, flags); ctrl = gsm->pending_cmd; if (ctrl) { - if (gsm->cretries == 0) { + if (gsm->cretries == 0 || !gsm->dlci[0] || gsm->dlci[0]->dead) { gsm->pending_cmd = NULL; ctrl->error = -ETIMEDOUT; ctrl->done = 1; @@ -1504,25 +1739,24 @@ static int gsm_control_wait(struct gsm_mux *gsm, struct gsm_control *control) static void gsm_dlci_close(struct gsm_dlci *dlci) { - unsigned long flags; - del_timer(&dlci->t1); if (debug & 8) pr_debug("DLCI %d goes closed.\n", dlci->addr); dlci->state = DLCI_CLOSED; + /* Prevent us from sending data before the link is up again */ + dlci->constipated = true; if (dlci->addr != 0) { tty_port_tty_hangup(&dlci->port, false); - spin_lock_irqsave(&dlci->lock, flags); - kfifo_reset(&dlci->fifo); - spin_unlock_irqrestore(&dlci->lock, flags); + gsm_dlci_clear_queues(dlci->gsm, dlci); /* Ensure that gsmtty_open() can return. */ tty_port_set_initialized(&dlci->port, 0); wake_up_interruptible(&dlci->port.open_wait); } else dlci->gsm->dead = true; - wake_up(&dlci->gsm->event); /* A DLCI 0 close is a MUX termination so we need to kick that back to userspace somehow */ + gsm_dlci_data_kick(dlci); + wake_up(&dlci->gsm->event); } /** @@ -1539,11 +1773,13 @@ static void gsm_dlci_open(struct gsm_dlci *dlci) del_timer(&dlci->t1); /* This will let a tty open continue */ dlci->state = DLCI_OPEN; + dlci->constipated = false; if (debug & 8) pr_debug("DLCI %d goes open.\n", dlci->addr); /* Send current modem state */ if (dlci->addr) gsm_modem_update(dlci, 0); + gsm_dlci_data_kick(dlci); wake_up(&dlci->gsm->event); } @@ -1569,8 +1805,8 @@ static void gsm_dlci_t1(struct timer_list *t) switch (dlci->state) { case DLCI_OPENING: - dlci->retries--; if (dlci->retries) { + dlci->retries--; gsm_command(dlci->gsm, dlci->addr, SABM|PF); mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100); } else if (!dlci->addr && gsm->control == (DM | PF)) { @@ -1585,8 +1821,8 @@ static void gsm_dlci_t1(struct timer_list *t) break; case DLCI_CLOSING: - dlci->retries--; if (dlci->retries) { + dlci->retries--; gsm_command(dlci->gsm, dlci->addr, DISC|PF); mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100); } else @@ -1620,6 +1856,25 @@ static void gsm_dlci_begin_open(struct gsm_dlci *dlci) } /** + * gsm_dlci_set_opening - change state to opening + * @dlci: DLCI to open + * + * Change internal state to wait for DLCI open from initiator side. + * We set off timers and responses upon reception of an SABM. + */ +static void gsm_dlci_set_opening(struct gsm_dlci *dlci) +{ + switch (dlci->state) { + case DLCI_CLOSED: + case DLCI_CLOSING: + dlci->state = DLCI_OPENING; + break; + default: + break; + } +} + +/** * gsm_dlci_begin_close - start channel open procedure * @dlci: DLCI to open * @@ -1728,6 +1983,30 @@ static void gsm_dlci_command(struct gsm_dlci *dlci, const u8 *data, int len) } } +/** + * gsm_kick_timer - transmit if possible + * @t: timer contained in our gsm object + * + * Transmit data from DLCIs if the queue is empty. We can't rely on + * a tty wakeup except when we filled the pipe so we need to fire off + * new data ourselves in other cases. + */ +static void gsm_kick_timer(struct timer_list *t) +{ + struct gsm_mux *gsm = from_timer(gsm, t, kick_timer); + unsigned long flags; + int sent = 0; + + spin_lock_irqsave(&gsm->tx_lock, flags); + /* If we have nothing running then we need to fire up */ + if (gsm->tx_bytes < TX_THRESH_LO) + sent = gsm_dlci_data_sweep(gsm); + spin_unlock_irqrestore(&gsm->tx_lock, flags); + + if (sent && debug & 4) + pr_info("%s TX queue stalled\n", __func__); +} + /* * Allocate/Free DLCI channels */ @@ -1762,10 +2041,13 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr) dlci->addr = addr; dlci->adaption = gsm->adaption; dlci->state = DLCI_CLOSED; - if (addr) + if (addr) { dlci->data = gsm_dlci_data; - else + /* Prevent us from sending data before the link is up */ + dlci->constipated = true; + } else { dlci->data = gsm_dlci_command; + } gsm->dlci[addr] = dlci; return dlci; } @@ -1925,7 +2207,7 @@ static void gsm_queue(struct gsm_mux *gsm) case UIH: case UIH|PF: if (dlci == NULL || dlci->state != DLCI_OPEN) { - gsm_command(gsm, address, DM|PF); + gsm_response(gsm, address, DM|PF); return; } dlci->data(dlci, gsm->buf, gsm->len); @@ -2048,7 +2330,7 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c) } else if ((c & ISO_IEC_646_MASK) == XOFF) { gsm->constipated = false; /* Kick the link in case it is idling */ - gsm_data_kick(gsm, NULL); + gsmld_write_trigger(gsm); return; } if (c == GSM1_SOF) { @@ -2176,18 +2458,29 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc) } /* Finish outstanding timers, making sure they are done */ + del_timer_sync(&gsm->kick_timer); del_timer_sync(&gsm->t2_timer); + /* Finish writing to ldisc */ + flush_work(&gsm->tx_work); + /* Free up any link layer users and finally the control channel */ + if (gsm->has_devices) { + gsm_unregister_devices(gsm_tty_driver, gsm->num); + gsm->has_devices = false; + } for (i = NUM_DLCI - 1; i >= 0; i--) if (gsm->dlci[i]) gsm_dlci_release(gsm->dlci[i]); mutex_unlock(&gsm->mutex); /* Now wipe the queues */ tty_ldisc_flush(gsm->tty); - list_for_each_entry_safe(txq, ntxq, &gsm->tx_list, list) + list_for_each_entry_safe(txq, ntxq, &gsm->tx_ctrl_list, list) + kfree(txq); + INIT_LIST_HEAD(&gsm->tx_ctrl_list); + list_for_each_entry_safe(txq, ntxq, &gsm->tx_data_list, list) kfree(txq); - INIT_LIST_HEAD(&gsm->tx_list); + INIT_LIST_HEAD(&gsm->tx_data_list); } /** @@ -2202,8 +2495,15 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc) static int gsm_activate_mux(struct gsm_mux *gsm) { struct gsm_dlci *dlci; + int ret; + + dlci = gsm_dlci_alloc(gsm, 0); + if (dlci == NULL) + return -ENOMEM; + timer_setup(&gsm->kick_timer, gsm_kick_timer, 0); timer_setup(&gsm->t2_timer, gsm_control_retransmit, 0); + INIT_WORK(&gsm->tx_work, gsmld_write_task); init_waitqueue_head(&gsm->event); spin_lock_init(&gsm->control_lock); spin_lock_init(&gsm->tx_lock); @@ -2213,9 +2513,11 @@ static int gsm_activate_mux(struct gsm_mux *gsm) else gsm->receive = gsm1_receive; - dlci = gsm_dlci_alloc(gsm, 0); - if (dlci == NULL) - return -ENOMEM; + ret = gsm_register_devices(gsm_tty_driver, gsm->num); + if (ret) + return ret; + + gsm->has_devices = true; gsm->dead = false; /* Tty opens are now permissible */ return 0; } @@ -2308,7 +2610,8 @@ static struct gsm_mux *gsm_alloc_mux(void) spin_lock_init(&gsm->lock); mutex_init(&gsm->mutex); kref_init(&gsm->ref); - INIT_LIST_HEAD(&gsm->tx_list); + INIT_LIST_HEAD(&gsm->tx_ctrl_list); + INIT_LIST_HEAD(&gsm->tx_data_list); gsm->t1 = T1; gsm->t2 = T2; @@ -2465,6 +2768,47 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len) return gsm->tty->ops->write(gsm->tty, data, len); } + +/** + * gsmld_write_trigger - schedule ldisc write task + * @gsm: our mux + */ +static void gsmld_write_trigger(struct gsm_mux *gsm) +{ + if (!gsm || !gsm->dlci[0] || gsm->dlci[0]->dead) + return; + schedule_work(&gsm->tx_work); +} + + +/** + * gsmld_write_task - ldisc write task + * @work: our tx write work + * + * Writes out data to the ldisc if possible. We are doing this here to + * avoid dead-locking. This returns if no space or data is left for output. + */ +static void gsmld_write_task(struct work_struct *work) +{ + struct gsm_mux *gsm = container_of(work, struct gsm_mux, tx_work); + unsigned long flags; + int i, ret; + + /* All outstanding control channel and control messages and one data + * frame is sent. + */ + ret = -ENODEV; + spin_lock_irqsave(&gsm->tx_lock, flags); + if (gsm->tty) + ret = gsm_data_kick(gsm); + spin_unlock_irqrestore(&gsm->tx_lock, flags); + + if (ret >= 0) + for (i = 0; i < NUM_DLCI; i++) + if (gsm->dlci[i]) + tty_port_tty_wakeup(&gsm->dlci[i]->port); +} + /** * gsmld_attach_gsm - mode set up * @tty: our tty structure @@ -2475,39 +2819,14 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len) * will need moving to an ioctl path. */ -static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) +static void gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) { - unsigned int base; - int ret, i; - gsm->tty = tty_kref_get(tty); /* Turn off tty XON/XOFF handling to handle it explicitly. */ gsm->old_c_iflag = tty->termios.c_iflag; tty->termios.c_iflag &= (IXON | IXOFF); - ret = gsm_activate_mux(gsm); - if (ret != 0) - tty_kref_put(gsm->tty); - else { - /* Don't register device 0 - this is the control channel and not - a usable tty interface */ - base = mux_num_to_base(gsm); /* Base for this MUX */ - for (i = 1; i < NUM_DLCI; i++) { - struct device *dev; - - dev = tty_register_device(gsm_tty_driver, - base + i, NULL); - if (IS_ERR(dev)) { - for (i--; i >= 1; i--) - tty_unregister_device(gsm_tty_driver, - base + i); - return PTR_ERR(dev); - } - } - } - return ret; } - /** * gsmld_detach_gsm - stop doing 0710 mux * @tty: tty attached to the mux @@ -2518,12 +2837,7 @@ static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) { - unsigned int base = mux_num_to_base(gsm); /* Base for this MUX */ - int i; - WARN_ON(tty != gsm->tty); - for (i = 1; i < NUM_DLCI; i++) - tty_unregister_device(gsm_tty_driver, base + i); /* Restore tty XON/XOFF handling. */ gsm->tty->termios.c_iflag = gsm->old_c_iflag; tty_kref_put(gsm->tty); @@ -2615,7 +2929,6 @@ static void gsmld_close(struct tty_struct *tty) static int gsmld_open(struct tty_struct *tty) { struct gsm_mux *gsm; - int ret; if (tty->ops->write == NULL) return -EINVAL; @@ -2631,12 +2944,13 @@ static int gsmld_open(struct tty_struct *tty) /* Attach the initial passive connection */ gsm->encoding = 1; - ret = gsmld_attach_gsm(tty, gsm); - if (ret != 0) { - gsm_cleanup_mux(gsm, false); - mux_put(gsm); - } - return ret; + gsmld_attach_gsm(tty, gsm); + + timer_setup(&gsm->kick_timer, gsm_kick_timer, 0); + timer_setup(&gsm->t2_timer, gsm_control_retransmit, 0); + INIT_WORK(&gsm->tx_work, gsmld_write_task); + + return 0; } /** @@ -2651,16 +2965,9 @@ static int gsmld_open(struct tty_struct *tty) static void gsmld_write_wakeup(struct tty_struct *tty) { struct gsm_mux *gsm = tty->disc_data; - unsigned long flags; /* Queue poll */ - clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); - spin_lock_irqsave(&gsm->tx_lock, flags); - gsm_data_kick(gsm, NULL); - if (gsm->tx_bytes < TX_THRESH_LO) { - gsm_dlci_data_sweep(gsm); - } - spin_unlock_irqrestore(&gsm->tx_lock, flags); + gsmld_write_trigger(gsm); } /** @@ -2704,11 +3011,24 @@ static ssize_t gsmld_read(struct tty_struct *tty, struct file *file, static ssize_t gsmld_write(struct tty_struct *tty, struct file *file, const unsigned char *buf, size_t nr) { - int space = tty_write_room(tty); + struct gsm_mux *gsm = tty->disc_data; + unsigned long flags; + int space; + int ret; + + if (!gsm) + return -ENODEV; + + ret = -ENOBUFS; + spin_lock_irqsave(&gsm->tx_lock, flags); + space = tty_write_room(tty); if (space >= nr) - return tty->ops->write(tty, buf, nr); - set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); - return -ENOBUFS; + ret = tty->ops->write(tty, buf, nr); + else + set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); + spin_unlock_irqrestore(&gsm->tx_lock, flags); + + return ret; } /** @@ -2733,12 +3053,15 @@ static __poll_t gsmld_poll(struct tty_struct *tty, struct file *file, poll_wait(file, &tty->read_wait, wait); poll_wait(file, &tty->write_wait, wait); + + if (gsm->dead) + mask |= EPOLLHUP; if (tty_hung_up_p(file)) mask |= EPOLLHUP; + if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) + mask |= EPOLLHUP; if (!tty_is_writelocked(tty) && tty_write_room(tty) > 0) mask |= EPOLLOUT | EPOLLWRNORM; - if (gsm->dead) - mask |= EPOLLHUP; return mask; } @@ -3174,6 +3497,8 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) /* Start sending off SABM messages */ if (gsm->initiator) gsm_dlci_begin_open(dlci); + else + gsm_dlci_set_opening(dlci); /* And wait for virtual carrier */ return tty_port_block_til_ready(port, tty, filp); } diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 640c9e871044..3afdd9033a9c 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -118,6 +118,9 @@ struct n_tty_data { size_t read_tail; size_t line_start; + /* # of chars looked ahead (to find software flow control chars) */ + size_t lookahead_count; + /* protected by output lock */ unsigned int column; unsigned int canon_column; @@ -333,6 +336,8 @@ static void reset_buffer_flags(struct n_tty_data *ldata) ldata->erasing = 0; bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); ldata->push = 0; + + ldata->lookahead_count = 0; } static void n_tty_packet_mode_flush(struct tty_struct *tty) @@ -1225,12 +1230,30 @@ static bool n_tty_is_char_flow_ctrl(struct tty_struct *tty, unsigned char c) return c == START_CHAR(tty) || c == STOP_CHAR(tty); } -/* Returns true if c is consumed as flow-control character */ -static bool n_tty_receive_char_flow_ctrl(struct tty_struct *tty, unsigned char c) +/** + * n_tty_receive_char_flow_ctrl - receive flow control chars + * @tty: terminal device + * @c: character + * @lookahead_done: lookahead has processed this character already + * + * Receive and process flow control character actions. + * + * In case lookahead for flow control chars already handled the character in + * advance to the normal receive, the actions are skipped during normal + * receive. + * + * Returns true if @c is consumed as flow-control character, the character + * must not be treated as normal character. + */ +static bool n_tty_receive_char_flow_ctrl(struct tty_struct *tty, unsigned char c, + bool lookahead_done) { if (!n_tty_is_char_flow_ctrl(tty, c)) return false; + if (lookahead_done) + return true; + if (c == START_CHAR(tty)) { start_tty(tty); process_echoes(tty); @@ -1242,11 +1265,12 @@ static bool n_tty_receive_char_flow_ctrl(struct tty_struct *tty, unsigned char c return true; } -static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c) +static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c, + bool lookahead_done) { struct n_tty_data *ldata = tty->disc_data; - if (I_IXON(tty) && n_tty_receive_char_flow_ctrl(tty, c)) + if (I_IXON(tty) && n_tty_receive_char_flow_ctrl(tty, c, lookahead_done)) return; if (L_ISIG(tty)) { @@ -1401,7 +1425,8 @@ static void n_tty_receive_char(struct tty_struct *tty, unsigned char c) put_tty_queue(c, ldata); } -static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c) +static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c, + bool lookahead_done) { if (I_ISTRIP(tty)) c &= 0x7f; @@ -1409,12 +1434,10 @@ static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c) c = tolower(c); if (I_IXON(tty)) { - if (c == STOP_CHAR(tty)) - stop_tty(tty); - else if (c == START_CHAR(tty) || - (tty->flow.stopped && !tty->flow.tco_stopped && I_IXANY(tty) && - c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && - c != SUSP_CHAR(tty))) { + if (!n_tty_receive_char_flow_ctrl(tty, c, lookahead_done) && + tty->flow.stopped && !tty->flow.tco_stopped && I_IXANY(tty) && + c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && + c != SUSP_CHAR(tty)) { start_tty(tty); process_echoes(tty); } @@ -1457,6 +1480,27 @@ n_tty_receive_char_lnext(struct tty_struct *tty, unsigned char c, char flag) n_tty_receive_char_flagged(tty, c, flag); } +/* Caller must ensure count > 0 */ +static void n_tty_lookahead_flow_ctrl(struct tty_struct *tty, const unsigned char *cp, + const unsigned char *fp, unsigned int count) +{ + struct n_tty_data *ldata = tty->disc_data; + unsigned char flag = TTY_NORMAL; + + ldata->lookahead_count += count; + + if (!I_IXON(tty)) + return; + + while (count--) { + if (fp) + flag = *fp++; + if (likely(flag == TTY_NORMAL)) + n_tty_receive_char_flow_ctrl(tty, *cp, false); + cp++; + } +} + static void n_tty_receive_buf_real_raw(struct tty_struct *tty, const unsigned char *cp, const char *fp, int count) @@ -1496,7 +1540,7 @@ n_tty_receive_buf_raw(struct tty_struct *tty, const unsigned char *cp, static void n_tty_receive_buf_closing(struct tty_struct *tty, const unsigned char *cp, - const char *fp, int count) + const char *fp, int count, bool lookahead_done) { char flag = TTY_NORMAL; @@ -1504,12 +1548,12 @@ n_tty_receive_buf_closing(struct tty_struct *tty, const unsigned char *cp, if (fp) flag = *fp++; if (likely(flag == TTY_NORMAL)) - n_tty_receive_char_closing(tty, *cp++); + n_tty_receive_char_closing(tty, *cp++, lookahead_done); } } static void n_tty_receive_buf_standard(struct tty_struct *tty, - const unsigned char *cp, const char *fp, int count) + const unsigned char *cp, const char *fp, int count, bool lookahead_done) { struct n_tty_data *ldata = tty->disc_data; char flag = TTY_NORMAL; @@ -1540,7 +1584,7 @@ static void n_tty_receive_buf_standard(struct tty_struct *tty, } if (test_bit(c, ldata->char_map)) - n_tty_receive_char_special(tty, c); + n_tty_receive_char_special(tty, c, lookahead_done); else n_tty_receive_char(tty, c); } @@ -1551,21 +1595,30 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp, { struct n_tty_data *ldata = tty->disc_data; bool preops = I_ISTRIP(tty) || (I_IUCLC(tty) && L_IEXTEN(tty)); + size_t la_count = min_t(size_t, ldata->lookahead_count, count); if (ldata->real_raw) n_tty_receive_buf_real_raw(tty, cp, fp, count); else if (ldata->raw || (L_EXTPROC(tty) && !preops)) n_tty_receive_buf_raw(tty, cp, fp, count); - else if (tty->closing && !L_EXTPROC(tty)) - n_tty_receive_buf_closing(tty, cp, fp, count); - else { - n_tty_receive_buf_standard(tty, cp, fp, count); + else if (tty->closing && !L_EXTPROC(tty)) { + if (la_count > 0) + n_tty_receive_buf_closing(tty, cp, fp, la_count, true); + if (count > la_count) + n_tty_receive_buf_closing(tty, cp, fp, count - la_count, false); + } else { + if (la_count > 0) + n_tty_receive_buf_standard(tty, cp, fp, la_count, true); + if (count > la_count) + n_tty_receive_buf_standard(tty, cp, fp, count - la_count, false); flush_echoes(tty); if (tty->ops->flush_chars) tty->ops->flush_chars(tty); } + ldata->lookahead_count -= la_count; + if (ldata->icanon && !L_EXTPROC(tty)) return; @@ -2446,6 +2499,7 @@ static struct tty_ldisc_ops n_tty_ops = { .receive_buf = n_tty_receive_buf, .write_wakeup = n_tty_write_wakeup, .receive_buf2 = n_tty_receive_buf2, + .lookahead_buf = n_tty_lookahead_flow_ctrl, }; /** diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 696030cfcb09..287153d32536 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -123,6 +123,26 @@ static inline void serial_out(struct uart_8250_port *up, int offset, int value) up->port.serial_out(&up->port, offset, value); } +/** + * serial_lsr_in - Read LSR register and preserve flags across reads + * @up: uart 8250 port + * + * Read LSR register and handle saving non-preserved flags across reads. + * The flags that are not preserved across reads are stored into + * up->lsr_saved_flags. + * + * Returns LSR value or'ed with the preserved flags (if any). + */ +static inline u16 serial_lsr_in(struct uart_8250_port *up) +{ + u16 lsr = up->lsr_saved_flags; + + lsr |= serial_in(up, UART_LSR); + up->lsr_saved_flags = lsr & up->lsr_save_mask; + + return lsr; +} + /* * For the 16C950 */ @@ -183,10 +203,12 @@ void serial8250_rpm_put(struct uart_8250_port *p); void serial8250_rpm_get_tx(struct uart_8250_port *p); void serial8250_rpm_put_tx(struct uart_8250_port *p); -int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485); +int serial8250_em485_config(struct uart_port *port, struct ktermios *termios, + struct serial_rs485 *rs485); void serial8250_em485_start_tx(struct uart_8250_port *p); void serial8250_em485_stop_tx(struct uart_8250_port *p); void serial8250_em485_destroy(struct uart_8250_port *p); +extern struct serial_rs485 serial8250_em485_supported; /* MCR <-> TIOCM conversion */ static inline int serial8250_TIOCM_to_MCR(int tiocm) diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c index 2a1226a78a0c..15a2387a5b25 100644 --- a/drivers/tty/serial/8250/8250_bcm2835aux.c +++ b/drivers/tty/serial/8250/8250_bcm2835aux.c @@ -108,6 +108,7 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) up.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE | UPF_SKIP_TEST | UPF_IOREMAP; up.port.rs485_config = serial8250_em485_config; + up.port.rs485_supported = serial8250_em485_supported; up.rs485_start_tx = bcm2835aux_rs485_start_tx; up.rs485_stop_tx = bcm2835aux_rs485_stop_tx; @@ -166,8 +167,10 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) uartclk = clk_get_rate(data->clk); if (!uartclk) { ret = device_property_read_u32(&pdev->dev, "clock-frequency", &uartclk); - if (ret) - return dev_err_probe(&pdev->dev, ret, "could not get clk rate\n"); + if (ret) { + dev_err_probe(&pdev->dev, ret, "could not get clk rate\n"); + goto dis_clk; + } } /* the HW-clock divider for bcm2835aux is 8, diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c index 9b878d023dac..8efdc271eb75 100644 --- a/drivers/tty/serial/8250/8250_bcm7271.c +++ b/drivers/tty/serial/8250/8250_bcm7271.c @@ -1139,16 +1139,19 @@ static int __maybe_unused brcmuart_suspend(struct device *dev) struct brcmuart_priv *priv = dev_get_drvdata(dev); struct uart_8250_port *up = serial8250_get_port(priv->line); struct uart_port *port = &up->port; - - serial8250_suspend_port(priv->line); - clk_disable_unprepare(priv->baud_mux_clk); + unsigned long flags; /* * This will prevent resume from enabling RTS before the - * baud rate has been resored. + * baud rate has been restored. */ + spin_lock_irqsave(&port->lock, flags); priv->saved_mctrl = port->mctrl; - port->mctrl = 0; + port->mctrl &= ~TIOCM_RTS; + spin_unlock_irqrestore(&port->lock, flags); + + serial8250_suspend_port(priv->line); + clk_disable_unprepare(priv->baud_mux_clk); return 0; } @@ -1158,6 +1161,7 @@ static int __maybe_unused brcmuart_resume(struct device *dev) struct brcmuart_priv *priv = dev_get_drvdata(dev); struct uart_8250_port *up = serial8250_get_port(priv->line); struct uart_port *port = &up->port; + unsigned long flags; int ret; ret = clk_prepare_enable(priv->baud_mux_clk); @@ -1180,7 +1184,15 @@ static int __maybe_unused brcmuart_resume(struct device *dev) start_rx_dma(serial8250_get_port(priv->line)); } serial8250_resume_port(priv->line); - port->mctrl = priv->saved_mctrl; + + if (priv->saved_mctrl & TIOCM_RTS) { + /* Restore RTS */ + spin_lock_irqsave(&port->lock, flags); + port->mctrl |= TIOCM_RTS; + port->ops->set_mctrl(port, port->mctrl); + spin_unlock_irqrestore(&port->lock, flags); + } + return 0; } diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 3f56dbc9432b..2e83e7367441 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -277,8 +277,7 @@ static void serial8250_backup_timeout(struct timer_list *t) * the "Diva" UART used on the management processor on many HP * ia64 and parisc boxes. */ - lsr = serial_in(up, UART_LSR); - up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; + lsr = serial_lsr_in(up); if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) && (!uart_circ_empty(&up->port.state->xmit) || up->port.x_char) && (lsr & UART_LSR_THRE)) { @@ -1008,9 +1007,11 @@ int serial8250_register_8250_port(const struct uart_8250_port *up) uart->port.throttle = up->port.throttle; uart->port.unthrottle = up->port.unthrottle; uart->port.rs485_config = up->port.rs485_config; + uart->port.rs485_supported = up->port.rs485_supported; uart->port.rs485 = up->port.rs485; uart->rs485_start_tx = up->rs485_start_tx; uart->rs485_stop_tx = up->rs485_stop_tx; + uart->lsr_save_mask = up->lsr_save_mask; uart->dma = up->dma; /* Take tx_loadsz from fifosize if it wasn't set separately */ @@ -1098,6 +1099,9 @@ int serial8250_register_8250_port(const struct uart_8250_port *up) ret = 0; } + if (!uart->lsr_save_mask) + uart->lsr_save_mask = LSR_SAVE_FLAGS; /* Use default LSR mask */ + /* Initialise interrupt backoff work if required */ if (up->overrun_backoff_time_ms > 0) { uart->overrun_backoff_time_ms = diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index bb6aca07ab56..a604b42e4458 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -9,26 +9,27 @@ * LCR is written whilst busy. If it is, then a busy detect interrupt is * raised, the LCR needs to be rewritten and the uart status register read. */ +#include <linux/acpi.h> +#include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/io.h> #include <linux/mod_devicetable.h> #include <linux/module.h> -#include <linux/serial_8250.h> -#include <linux/serial_reg.h> +#include <linux/notifier.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/property.h> -#include <linux/workqueue.h> -#include <linux/notifier.h> -#include <linux/slab.h> -#include <linux/acpi.h> -#include <linux/clk.h> #include <linux/reset.h> -#include <linux/pm_runtime.h> +#include <linux/slab.h> +#include <linux/workqueue.h> #include <asm/byteorder.h> +#include <linux/serial_8250.h> +#include <linux/serial_reg.h> + #include "8250_dwlib.h" /* Offsets for the DesignWare specific registers */ @@ -82,8 +83,21 @@ static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value) static void dw8250_force_idle(struct uart_port *p) { struct uart_8250_port *up = up_to_u8250p(p); + unsigned int lsr; serial8250_clear_and_reinit_fifos(up); + + /* + * With PSLVERR_RESP_EN parameter set to 1, the device generates an + * error response when an attempt to read an empty RBR with FIFO + * enabled. + */ + if (up->fcr & UART_FCR_ENABLE_FIFO) { + lsr = p->serial_in(p, UART_LSR); + if (!(lsr & UART_LSR_DR)) + return; + } + (void)p->serial_in(p, UART_RX); } @@ -122,12 +136,15 @@ static void dw8250_check_lcr(struct uart_port *p, int value) /* Returns once the transmitter is empty or we run out of retries */ static void dw8250_tx_wait_empty(struct uart_port *p) { + struct uart_8250_port *up = up_to_u8250p(p); unsigned int tries = 20000; unsigned int delay_threshold = tries - 1000; unsigned int lsr; while (tries--) { lsr = readb (p->membase + (UART_LSR << p->regshift)); + up->lsr_saved_flags |= lsr & up->lsr_save_mask; + if (lsr & UART_LSR_TEMT) break; @@ -140,29 +157,23 @@ static void dw8250_tx_wait_empty(struct uart_port *p) } } -static void dw8250_serial_out38x(struct uart_port *p, int offset, int value) +static void dw8250_serial_out(struct uart_port *p, int offset, int value) { struct dw8250_data *d = to_dw8250_data(p->private_data); - /* Allow the TX to drain before we reconfigure */ - if (offset == UART_LCR) - dw8250_tx_wait_empty(p); - writeb(value, p->membase + (offset << p->regshift)); if (offset == UART_LCR && !d->uart_16550_compatible) dw8250_check_lcr(p, value); } - -static void dw8250_serial_out(struct uart_port *p, int offset, int value) +static void dw8250_serial_out38x(struct uart_port *p, int offset, int value) { - struct dw8250_data *d = to_dw8250_data(p->private_data); - - writeb(value, p->membase + (offset << p->regshift)); + /* Allow the TX to drain before we reconfigure */ + if (offset == UART_LCR) + dw8250_tx_wait_empty(p); - if (offset == UART_LCR && !d->uart_16550_compatible) - dw8250_check_lcr(p, value); + dw8250_serial_out(p, offset, value); } static unsigned int dw8250_serial_in(struct uart_port *p, int offset) @@ -253,7 +264,7 @@ static int dw8250_handle_irq(struct uart_port *p) */ if (!up->dma && rx_timeout) { spin_lock_irqsave(&p->lock, flags); - status = p->serial_in(p, UART_LSR); + status = serial_lsr_in(up); if (!(status & (UART_LSR_DR | UART_LSR_BI))) (void) p->serial_in(p, UART_RX); @@ -263,7 +274,10 @@ static int dw8250_handle_irq(struct uart_port *p) /* Manually stop the Rx DMA transfer when acting as flow controller */ if (quirks & DW_UART_QUIRK_IS_DMA_FC && up->dma && up->dma->rx_running && rx_timeout) { - status = p->serial_in(p, UART_LSR); + spin_lock_irqsave(&p->lock, flags); + status = serial_lsr_in(up); + spin_unlock_irqrestore(&p->lock, flags); + if (status & (UART_LSR_DR | UART_LSR_BI)) { dw8250_writel_ext(p, RZN1_UART_RDMACR, 0); dw8250_writel_ext(p, DW_UART_DMASA, 1); @@ -688,7 +702,6 @@ static int dw8250_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM_SLEEP static int dw8250_suspend(struct device *dev) { struct dw8250_data *data = dev_get_drvdata(dev); @@ -706,9 +719,7 @@ static int dw8250_resume(struct device *dev) return 0; } -#endif /* CONFIG_PM_SLEEP */ -#ifdef CONFIG_PM static int dw8250_runtime_suspend(struct device *dev) { struct dw8250_data *data = dev_get_drvdata(dev); @@ -730,11 +741,10 @@ static int dw8250_runtime_resume(struct device *dev) return 0; } -#endif static const struct dev_pm_ops dw8250_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(dw8250_suspend, dw8250_resume) - SET_RUNTIME_PM_OPS(dw8250_runtime_suspend, dw8250_runtime_resume, NULL) + SYSTEM_SLEEP_PM_OPS(dw8250_suspend, dw8250_resume) + RUNTIME_PM_OPS(dw8250_runtime_suspend, dw8250_runtime_resume, NULL) }; static const struct dw8250_platform_data dw8250_dw_apb = { @@ -792,7 +802,7 @@ MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match); static struct platform_driver dw8250_platform_driver = { .driver = { .name = "dw-apb-uart", - .pm = &dw8250_pm_ops, + .pm = pm_ptr(&dw8250_pm_ops), .of_match_table = dw8250_of_match, .acpi_match_table = dw8250_acpi_match, }, diff --git a/drivers/tty/serial/8250/8250_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c index fbabfdd8c7b8..dbe4d44f60d4 100644 --- a/drivers/tty/serial/8250/8250_dwlib.c +++ b/drivers/tty/serial/8250/8250_dwlib.c @@ -3,8 +3,10 @@ #include <linux/bitops.h> #include <linux/bitfield.h> +#include <linux/delay.h> #include <linux/device.h> #include <linux/kernel.h> +#include <linux/math.h> #include <linux/property.h> #include <linux/serial_8250.h> #include <linux/serial_core.h> @@ -16,9 +18,18 @@ #define DW_UART_DE_EN 0xb0 /* Driver Output Enable Register */ #define DW_UART_RE_EN 0xb4 /* Receiver Output Enable Register */ #define DW_UART_DLF 0xc0 /* Divisor Latch Fraction Register */ +#define DW_UART_RAR 0xc4 /* Receive Address Register */ +#define DW_UART_TAR 0xc8 /* Transmit Address Register */ +#define DW_UART_LCR_EXT 0xcc /* Line Extended Control Register */ #define DW_UART_CPR 0xf4 /* Component Parameter Register */ #define DW_UART_UCV 0xf8 /* UART Component Version */ +/* Receive / Transmit Address Register bits */ +#define DW_UART_ADDR_MASK GENMASK(7, 0) + +/* Line Status Register bits */ +#define DW_UART_LSR_ADDR_RCVD BIT(8) + /* Transceiver Control Register bits */ #define DW_UART_TCR_RS485_EN BIT(0) #define DW_UART_TCR_RE_POL BIT(1) @@ -28,22 +39,28 @@ #define DW_UART_TCR_XFER_MODE_SW_DE_OR_RE FIELD_PREP(DW_UART_TCR_XFER_MODE, 1) #define DW_UART_TCR_XFER_MODE_DE_OR_RE FIELD_PREP(DW_UART_TCR_XFER_MODE, 2) +/* Line Extended Control Register bits */ +#define DW_UART_LCR_EXT_DLS_E BIT(0) +#define DW_UART_LCR_EXT_ADDR_MATCH BIT(1) +#define DW_UART_LCR_EXT_SEND_ADDR BIT(2) +#define DW_UART_LCR_EXT_TRANSMIT_MODE BIT(3) + /* Component Parameter Register bits */ -#define DW_UART_CPR_ABP_DATA_WIDTH (3 << 0) -#define DW_UART_CPR_AFCE_MODE (1 << 4) -#define DW_UART_CPR_THRE_MODE (1 << 5) -#define DW_UART_CPR_SIR_MODE (1 << 6) -#define DW_UART_CPR_SIR_LP_MODE (1 << 7) -#define DW_UART_CPR_ADDITIONAL_FEATURES (1 << 8) -#define DW_UART_CPR_FIFO_ACCESS (1 << 9) -#define DW_UART_CPR_FIFO_STAT (1 << 10) -#define DW_UART_CPR_SHADOW (1 << 11) -#define DW_UART_CPR_ENCODED_PARMS (1 << 12) -#define DW_UART_CPR_DMA_EXTRA (1 << 13) -#define DW_UART_CPR_FIFO_MODE (0xff << 16) +#define DW_UART_CPR_ABP_DATA_WIDTH GENMASK(1, 0) +#define DW_UART_CPR_AFCE_MODE BIT(4) +#define DW_UART_CPR_THRE_MODE BIT(5) +#define DW_UART_CPR_SIR_MODE BIT(6) +#define DW_UART_CPR_SIR_LP_MODE BIT(7) +#define DW_UART_CPR_ADDITIONAL_FEATURES BIT(8) +#define DW_UART_CPR_FIFO_ACCESS BIT(9) +#define DW_UART_CPR_FIFO_STAT BIT(10) +#define DW_UART_CPR_SHADOW BIT(11) +#define DW_UART_CPR_ENCODED_PARMS BIT(12) +#define DW_UART_CPR_DMA_EXTRA BIT(13) +#define DW_UART_CPR_FIFO_MODE GENMASK(23, 16) /* Helper for FIFO size calculation */ -#define DW_UART_CPR_FIFO_SIZE(a) (((a >> 16) & 0xff) * 16) +#define DW_UART_CPR_FIFO_SIZE(a) (FIELD_GET(DW_UART_CPR_FIFO_MODE, (a)) * 16) /* * divisor = div(I) + div(F) @@ -82,10 +99,85 @@ void dw8250_do_set_termios(struct uart_port *p, struct ktermios *termios, struct p->status |= UPSTAT_AUTOCTS; serial8250_do_set_termios(p, termios, old); + + /* Filter addresses which have 9th bit set */ + p->ignore_status_mask |= DW_UART_LSR_ADDR_RCVD; + p->read_status_mask |= DW_UART_LSR_ADDR_RCVD; } EXPORT_SYMBOL_GPL(dw8250_do_set_termios); -static int dw8250_rs485_config(struct uart_port *p, struct serial_rs485 *rs485) +/* + * Wait until re is de-asserted for sure. An ongoing receive will keep + * re asserted until end of frame. Without BUSY indication available, + * only available course of action is to wait for the time it takes to + * receive one frame (there might nothing to receive but w/o BUSY the + * driver cannot know). + */ +static void dw8250_wait_re_deassert(struct uart_port *p) +{ + ndelay(p->frame_time); +} + +static void dw8250_update_rar(struct uart_port *p, u32 addr) +{ + u32 re_en = dw8250_readl_ext(p, DW_UART_RE_EN); + + /* + * RAR shouldn't be changed while receiving. Thus, de-assert RE_EN + * if asserted and wait. + */ + if (re_en) + dw8250_writel_ext(p, DW_UART_RE_EN, 0); + dw8250_wait_re_deassert(p); + dw8250_writel_ext(p, DW_UART_RAR, addr); + if (re_en) + dw8250_writel_ext(p, DW_UART_RE_EN, re_en); +} + +static void dw8250_rs485_set_addr(struct uart_port *p, struct serial_rs485 *rs485, + struct ktermios *termios) +{ + u32 lcr = dw8250_readl_ext(p, DW_UART_LCR_EXT); + + if (rs485->flags & SER_RS485_ADDRB) { + lcr |= DW_UART_LCR_EXT_DLS_E; + if (termios) + termios->c_cflag |= ADDRB; + + if (rs485->flags & SER_RS485_ADDR_RECV) { + u32 delta = p->rs485.flags ^ rs485->flags; + + /* + * rs485 (param) is equal to uart_port's rs485 only during init + * (during init, delta is not yet applicable). + */ + if (unlikely(&p->rs485 == rs485)) + delta = rs485->flags; + + if ((delta & SER_RS485_ADDR_RECV) || + (p->rs485.addr_recv != rs485->addr_recv)) + dw8250_update_rar(p, rs485->addr_recv); + lcr |= DW_UART_LCR_EXT_ADDR_MATCH; + } else { + lcr &= ~DW_UART_LCR_EXT_ADDR_MATCH; + } + if (rs485->flags & SER_RS485_ADDR_DEST) { + /* + * Don't skip writes here as another endpoint could + * have changed communication line's destination + * address in between. + */ + dw8250_writel_ext(p, DW_UART_TAR, rs485->addr_dest); + lcr |= DW_UART_LCR_EXT_SEND_ADDR; + } + } else { + lcr = 0; + } + dw8250_writel_ext(p, DW_UART_LCR_EXT, lcr); +} + +static int dw8250_rs485_config(struct uart_port *p, struct ktermios *termios, + struct serial_rs485 *rs485) { u32 tcr; @@ -93,25 +185,17 @@ static int dw8250_rs485_config(struct uart_port *p, struct serial_rs485 *rs485) tcr &= ~DW_UART_TCR_XFER_MODE; if (rs485->flags & SER_RS485_ENABLED) { - /* Clear unsupported flags. */ - rs485->flags &= SER_RS485_ENABLED | SER_RS485_RX_DURING_TX | - SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND; tcr |= DW_UART_TCR_RS485_EN; - if (rs485->flags & SER_RS485_RX_DURING_TX) { + if (rs485->flags & SER_RS485_RX_DURING_TX) tcr |= DW_UART_TCR_XFER_MODE_DE_DURING_RE; - } else { - /* HW does not support same DE level for tx and rx */ - if (!(rs485->flags & SER_RS485_RTS_ON_SEND) == - !(rs485->flags & SER_RS485_RTS_AFTER_SEND)) - return -EINVAL; - + else tcr |= DW_UART_TCR_XFER_MODE_DE_OR_RE; - } dw8250_writel_ext(p, DW_UART_DE_EN, 1); dw8250_writel_ext(p, DW_UART_RE_EN, 1); } else { - rs485->flags = 0; + if (termios) + termios->c_cflag &= ~ADDRB; tcr &= ~DW_UART_TCR_RS485_EN; } @@ -127,10 +211,9 @@ static int dw8250_rs485_config(struct uart_port *p, struct serial_rs485 *rs485) dw8250_writel_ext(p, DW_UART_TCR, tcr); - rs485->delay_rts_before_send = 0; - rs485->delay_rts_after_send = 0; - - p->rs485 = *rs485; + /* Addressing mode can only be set up after TCR */ + if (rs485->flags & SER_RS485_ENABLED) + dw8250_rs485_set_addr(p, rs485, termios); return 0; } @@ -149,6 +232,12 @@ static bool dw8250_detect_rs485_hw(struct uart_port *p) return reg; } +static const struct serial_rs485 dw8250_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RX_DURING_TX | SER_RS485_RTS_ON_SEND | + SER_RS485_RTS_AFTER_SEND | SER_RS485_ADDRB | SER_RS485_ADDR_RECV | + SER_RS485_ADDR_DEST, +}; + void dw8250_setup_port(struct uart_port *p) { struct dw8250_port_data *pd = p->private_data; @@ -159,8 +248,11 @@ void dw8250_setup_port(struct uart_port *p) pd->hw_rs485_support = dw8250_detect_rs485_hw(p); if (pd->hw_rs485_support) { p->rs485_config = dw8250_rs485_config; + up->lsr_save_mask = LSR_SAVE_FLAGS | DW_UART_LSR_ADDR_RCVD; + p->rs485_supported = dw8250_rs485_supported; } else { p->rs485_config = serial8250_em485_config; + p->rs485_supported = serial8250_em485_supported; up->rs485_start_tx = serial8250_em485_start_tx; up->rs485_stop_tx = serial8250_em485_stop_tx; } diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index e52585064565..f271becfc46c 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -84,8 +84,6 @@ static void serial8250_early_out(struct uart_port *port, int offset, int value) } } -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - static void serial_putc(struct uart_port *port, unsigned char c) { unsigned int status; @@ -94,7 +92,7 @@ static void serial_putc(struct uart_port *port, unsigned char c) for (;;) { status = serial8250_early_in(port, UART_LSR); - if ((status & BOTH_EMPTY) == BOTH_EMPTY) + if (uart_lsr_tx_empty(status)) break; cpu_relax(); } diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index 7292917ac878..314a05e009df 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -112,7 +112,9 @@ struct exar8250; struct exar8250_platform { - int (*rs485_config)(struct uart_port *, struct serial_rs485 *); + int (*rs485_config)(struct uart_port *port, struct ktermios *termios, + struct serial_rs485 *rs485); + const struct serial_rs485 *rs485_supported; int (*register_gpio)(struct pci_dev *, struct uart_8250_port *); void (*unregister_gpio)(struct uart_8250_port *); }; @@ -194,11 +196,11 @@ static int xr17v35x_startup(struct uart_port *port) static void exar_shutdown(struct uart_port *port) { - unsigned char lsr; bool tx_complete = false; struct uart_8250_port *up = up_to_u8250p(port); struct circ_buf *xmit = &port->state->xmit; int i = 0; + u16 lsr; do { lsr = serial_in(up, UART_LSR); @@ -408,7 +410,7 @@ static void xr17v35x_unregister_gpio(struct uart_8250_port *port) port->port.private_data = NULL; } -static int generic_rs485_config(struct uart_port *port, +static int generic_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { bool is_rs485 = !!(rs485->flags & SER_RS485_ENABLED); @@ -426,18 +428,21 @@ static int generic_rs485_config(struct uart_port *port, if (is_rs485) writeb(UART_EXAR_RS485_DLY(4), p + UART_MSR); - port->rs485 = *rs485; - return 0; } +static const struct serial_rs485 generic_rs485_supported = { + .flags = SER_RS485_ENABLED, +}; + static const struct exar8250_platform exar8250_default_platform = { .register_gpio = xr17v35x_register_gpio, .unregister_gpio = xr17v35x_unregister_gpio, .rs485_config = generic_rs485_config, + .rs485_supported = &generic_rs485_supported, }; -static int iot2040_rs485_config(struct uart_port *port, +static int iot2040_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { bool is_rs485 = !!(rs485->flags & SER_RS485_ENABLED); @@ -467,9 +472,13 @@ static int iot2040_rs485_config(struct uart_port *port, value |= mode; writeb(value, p + UART_EXAR_MPIOLVL_7_0); - return generic_rs485_config(port, rs485); + return generic_rs485_config(port, termios, rs485); } +static const struct serial_rs485 iot2040_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RX_DURING_TX | SER_RS485_TERMINATE_BUS, +}; + static const struct property_entry iot2040_gpio_properties[] = { PROPERTY_ENTRY_U32("exar,first-pin", 10), PROPERTY_ENTRY_U32("ngpios", 1), @@ -498,6 +507,7 @@ static int iot2040_register_gpio(struct pci_dev *pcidev, static const struct exar8250_platform iot2040_platform = { .rs485_config = iot2040_rs485_config, + .rs485_supported = &iot2040_rs485_supported, .register_gpio = iot2040_register_gpio, .unregister_gpio = xr17v35x_unregister_gpio, }; @@ -540,6 +550,7 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev, port->port.uartclk = baud * 16; port->port.rs485_config = platform->rs485_config; + port->port.rs485_supported = *(platform->rs485_supported); /* * Setup the UART clock for the devices on expansion slot to diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c index dba5950b8d0e..65b6b3cbaff6 100644 --- a/drivers/tty/serial/8250/8250_fintek.c +++ b/drivers/tty/serial/8250/8250_fintek.c @@ -191,7 +191,7 @@ static int fintek_8250_get_ldn_range(struct fintek_8250 *pdata, int *min, return -ENODEV; } -static int fintek_8250_rs485_config(struct uart_port *port, +static int fintek_8250_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { uint8_t config = 0; @@ -206,19 +206,7 @@ static int fintek_8250_rs485_config(struct uart_port *port, if (!(rs485->flags & SER_RS485_RTS_ON_SEND) == !(rs485->flags & SER_RS485_RTS_AFTER_SEND)) return -EINVAL; - memset(rs485->padding, 0, sizeof(rs485->padding)); config |= RS485_URA; - } else { - memset(rs485, 0, sizeof(*rs485)); - } - - rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | - SER_RS485_RTS_AFTER_SEND; - - /* Only the first port supports delays */ - if (pdata->index) { - rs485->delay_rts_before_send = 0; - rs485->delay_rts_after_send = 0; } if (rs485->delay_rts_before_send) { @@ -241,8 +229,6 @@ static int fintek_8250_rs485_config(struct uart_port *port, sio_write_reg(pdata, RS485, config); fintek_8250_exit_key(pdata->base_port); - port->rs485 = *rs485; - return 0; } @@ -424,6 +410,17 @@ static int probe_setup_port(struct fintek_8250 *pdata, return -ENODEV; } +/* Only the first port supports delays */ +static const struct serial_rs485 fintek_8250_rs485_supported_port0 = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + +static const struct serial_rs485 fintek_8250_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, +}; + static void fintek_8250_set_rs485_handler(struct uart_8250_port *uart) { struct fintek_8250 *pdata = uart->port.private_data; @@ -435,6 +432,10 @@ static void fintek_8250_set_rs485_handler(struct uart_8250_port *uart) case CHIP_ID_F81866: case CHIP_ID_F81865: uart->port.rs485_config = fintek_8250_rs485_config; + if (!pdata->index) + uart->port.rs485_supported = fintek_8250_rs485_supported_port0; + else + uart->port.rs485_supported = fintek_8250_rs485_supported; break; default: /* No RS485 Auto direction functional */ diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c index 9c01c531349d..8aad15622a2e 100644 --- a/drivers/tty/serial/8250/8250_fsl.c +++ b/drivers/tty/serial/8250/8250_fsl.c @@ -25,8 +25,8 @@ int fsl8250_handle_irq(struct uart_port *port) { - unsigned char lsr, orig_lsr; unsigned long flags; + u16 lsr, orig_lsr; unsigned int iir; struct uart_8250_port *up = up_to_u8250p(port); @@ -77,7 +77,7 @@ int fsl8250_handle_irq(struct uart_port *port) if ((lsr & UART_LSR_THRE) && (up->ier & UART_IER_THRI)) serial8250_tx_chars(up); - up->lsr_saved_flags = orig_lsr; + up->lsr_saved_flags |= orig_lsr & UART_LSR_BI; uart_unlock_and_check_sysrq_irqrestore(&up->port, flags); diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c index cff91aa03f29..2b2f5d8d24b9 100644 --- a/drivers/tty/serial/8250/8250_ingenic.c +++ b/drivers/tty/serial/8250/8250_ingenic.c @@ -54,7 +54,7 @@ static void early_out(struct uart_port *port, int offset, uint8_t value) static void ingenic_early_console_putc(struct uart_port *port, unsigned char c) { - uint8_t lsr; + u16 lsr; do { lsr = early_in(port, UART_LSR); diff --git a/drivers/tty/serial/8250/8250_lpc18xx.c b/drivers/tty/serial/8250/8250_lpc18xx.c index 570e25d6f37e..6dc85aaba5d0 100644 --- a/drivers/tty/serial/8250/8250_lpc18xx.c +++ b/drivers/tty/serial/8250/8250_lpc18xx.c @@ -32,7 +32,7 @@ struct lpc18xx_uart_data { int line; }; -static int lpc18xx_rs485_config(struct uart_port *port, +static int lpc18xx_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct uart_8250_port *up = up_to_u8250p(port); @@ -40,24 +40,12 @@ static int lpc18xx_rs485_config(struct uart_port *port, u32 rs485_dly_reg = 0; unsigned baud_clk; - if (rs485->flags & SER_RS485_ENABLED) - memset(rs485->padding, 0, sizeof(rs485->padding)); - else - memset(rs485, 0, sizeof(*rs485)); - - rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | - SER_RS485_RTS_AFTER_SEND; - if (rs485->flags & SER_RS485_ENABLED) { rs485_ctrl_reg |= LPC18XX_UART_RS485CTRL_NMMEN | LPC18XX_UART_RS485CTRL_DCTRL; - if (rs485->flags & SER_RS485_RTS_ON_SEND) { + if (rs485->flags & SER_RS485_RTS_ON_SEND) rs485_ctrl_reg |= LPC18XX_UART_RS485CTRL_OINV; - rs485->flags &= ~SER_RS485_RTS_AFTER_SEND; - } else { - rs485->flags |= SER_RS485_RTS_AFTER_SEND; - } } if (rs485->delay_rts_after_send) { @@ -73,14 +61,9 @@ static int lpc18xx_rs485_config(struct uart_port *port, / baud_clk; } - /* Delay RTS before send not supported */ - rs485->delay_rts_before_send = 0; - serial_out(up, LPC18XX_UART_RS485CTRL, rs485_ctrl_reg); serial_out(up, LPC18XX_UART_RS485DLY, rs485_dly_reg); - port->rs485 = *rs485; - return 0; } @@ -98,6 +81,12 @@ static void lpc18xx_uart_serial_out(struct uart_port *p, int offset, int value) writel(value, p->membase + offset); } +static const struct serial_rs485 lpc18xx_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, + .delay_rts_after_send = 1, + /* Delay RTS before send is not supported */ +}; + static int lpc18xx_serial_probe(struct platform_device *pdev) { struct lpc18xx_uart_data *data; @@ -168,6 +157,7 @@ static int lpc18xx_serial_probe(struct platform_device *pdev) uart.port.uartclk = clk_get_rate(data->clk_uart); uart.port.private_data = data; uart.port.rs485_config = lpc18xx_rs485_config; + uart.port.rs485_supported = lpc18xx_rs485_supported; uart.port.serial_out = lpc18xx_uart_serial_out; uart.dma = &data->dma; diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 0f5af061e0b4..4ba43bef9933 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -330,7 +330,7 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) uart.port.irq = pci_irq_vector(pdev, 0); uart.port.private_data = &lpss->data; uart.port.type = PORT_16550A; - uart.port.iotype = UPIO_MEM; + uart.port.iotype = UPIO_MEM32; uart.port.regshift = 2; uart.port.uartclk = lpss->board->base_baud * 16; uart.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE; diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c index 5a699a1aa79c..1b461fba15a3 100644 --- a/drivers/tty/serial/8250/8250_of.c +++ b/drivers/tty/serial/8250/8250_of.c @@ -165,6 +165,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev, port->dev = &ofdev->dev; port->rs485_config = serial8250_em485_config; + port->rs485_supported = serial8250_em485_supported; up->rs485_start_tx = serial8250_em485_start_tx; up->rs485_stop_tx = serial8250_em485_stop_tx; diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index ac8bfa042391..0dcecbbc3967 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -1115,8 +1115,7 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir) return omap_8250_rx_dma(up); } -static unsigned char omap_8250_handle_rx_dma(struct uart_8250_port *up, - u8 iir, unsigned char status) +static u16 omap_8250_handle_rx_dma(struct uart_8250_port *up, u8 iir, u16 status) { if ((status & (UART_LSR_DR | UART_LSR_BI)) && (iir & UART_IIR_RDI)) { @@ -1130,7 +1129,7 @@ static unsigned char omap_8250_handle_rx_dma(struct uart_8250_port *up, } static void am654_8250_handle_rx_dma(struct uart_8250_port *up, u8 iir, - unsigned char status) + u16 status) { /* * Queue a new transfer if FIFO has data. @@ -1164,7 +1163,7 @@ static int omap_8250_dma_handle_irq(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); struct omap8250_priv *priv = up->port.private_data; - unsigned char status; + u16 status; u8 iir; serial8250_rpm_get(up); diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index a17619db7939..6f66dc2ebacc 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1553,7 +1553,7 @@ pci_brcm_trumanage_setup(struct serial_private *priv, #define FINTEK_RTS_INVERT BIT(5) /* We should do proper H/W transceiver setting before change to RS485 mode */ -static int pci_fintek_rs485_config(struct uart_port *port, +static int pci_fintek_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct pci_dev *pci_dev = to_pci_dev(port->dev); @@ -1562,16 +1562,6 @@ static int pci_fintek_rs485_config(struct uart_port *port, pci_read_config_byte(pci_dev, 0x40 + 8 * *index + 7, &setting); - if (!rs485) - rs485 = &port->rs485; - else if (rs485->flags & SER_RS485_ENABLED) - memset(rs485->padding, 0, sizeof(rs485->padding)); - else - memset(rs485, 0, sizeof(*rs485)); - - /* F81504/508/512 not support RTS delay before or after send */ - rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND; - if (rs485->flags & SER_RS485_ENABLED) { /* Enable RTS H/W control mode */ setting |= FINTEK_RTS_CONTROL_BY_HW; @@ -1583,9 +1573,6 @@ static int pci_fintek_rs485_config(struct uart_port *port, /* RTS driving low on TX */ setting |= FINTEK_RTS_INVERT; } - - rs485->delay_rts_after_send = 0; - rs485->delay_rts_before_send = 0; } else { /* Disable RTS H/W control mode */ setting &= ~(FINTEK_RTS_CONTROL_BY_HW | FINTEK_RTS_INVERT); @@ -1593,12 +1580,14 @@ static int pci_fintek_rs485_config(struct uart_port *port, pci_write_config_byte(pci_dev, 0x40 + 8 * *index + 7, setting); - if (rs485 != &port->rs485) - port->rs485 = *rs485; - return 0; } +static const struct serial_rs485 pci_fintek_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND, + /* F81504/508/512 does not support RTS delay before or after send */ +}; + static int pci_fintek_setup(struct serial_private *priv, const struct pciserial_board *board, struct uart_8250_port *port, int idx) @@ -1618,6 +1607,7 @@ static int pci_fintek_setup(struct serial_private *priv, port->port.iotype = UPIO_PORT; port->port.iobase = iobase; port->port.rs485_config = pci_fintek_rs485_config; + port->port.rs485_supported = pci_fintek_rs485_supported; data = devm_kzalloc(&pdev->dev, sizeof(u8), GFP_KERNEL); if (!data) @@ -1689,7 +1679,7 @@ static int pci_fintek_init(struct pci_dev *dev) * pciserial_resume_ports() */ port = serial8250_get_port(priv->line[i]); - pci_fintek_rs485_config(&port->port, NULL); + uart_rs485_config(&port->port); } else { /* First init without port data * force init to RS232 Mode @@ -5077,6 +5067,115 @@ static const struct pci_device_id serial_pci_tbl[] = { 0, 0, pbn_b2_4_115200 }, /* + * Brainboxes PX-101 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4005, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b0_2_115200 }, + { PCI_VENDOR_ID_INTASHIELD, 0x4019, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_2_15625000 }, + /* + * Brainboxes PX-235/246 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4004, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b0_1_115200 }, + { PCI_VENDOR_ID_INTASHIELD, 0x4016, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_1_15625000 }, + /* + * Brainboxes PX-203/PX-257 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4006, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b0_2_115200 }, + { PCI_VENDOR_ID_INTASHIELD, 0x4015, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_4_15625000 }, + /* + * Brainboxes PX-260/PX-701 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x400A, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_4_15625000 }, + /* + * Brainboxes PX-310 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x400E, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_2_15625000 }, + /* + * Brainboxes PX-313 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x400C, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_2_15625000 }, + /* + * Brainboxes PX-320/324/PX-376/PX-387 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x400B, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_1_15625000 }, + /* + * Brainboxes PX-335/346 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x400F, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_4_15625000 }, + /* + * Brainboxes PX-368 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4010, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_4_15625000 }, + /* + * Brainboxes PX-420 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4000, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b0_4_115200 }, + { PCI_VENDOR_ID_INTASHIELD, 0x4011, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_4_15625000 }, + /* + * Brainboxes PX-803 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4009, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b0_1_115200 }, + { PCI_VENDOR_ID_INTASHIELD, 0x401E, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_1_15625000 }, + /* + * Brainboxes PX-846 + */ + { PCI_VENDOR_ID_INTASHIELD, 0x4008, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b0_1_115200 }, + { PCI_VENDOR_ID_INTASHIELD, 0x4017, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_oxsemi_1_15625000 }, + + /* * Perle PCI-RAS cards */ { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030, diff --git a/drivers/tty/serial/8250/8250_pericom.c b/drivers/tty/serial/8250/8250_pericom.c index 95ff10f25d58..b8d5b7714a9d 100644 --- a/drivers/tty/serial/8250/8250_pericom.c +++ b/drivers/tty/serial/8250/8250_pericom.c @@ -73,7 +73,7 @@ static void pericom_do_set_divisor(struct uart_port *port, unsigned int baud, struct uart_8250_port *up = up_to_u8250p(port); int lcr = serial_port_in(port, UART_LCR); - serial_port_out(port, UART_LCR, lcr | 0x80); + serial_port_out(port, UART_LCR, lcr | UART_LCR_DLAB); serial_dl_write(up, divisor); serial_port_out(port, 2, 16 - scr); serial_port_out(port, UART_LCR, lcr); diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 3c36a06a20b0..39b35a61958c 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -50,8 +50,6 @@ #define DEBUG_AUTOCONF(fmt...) do { } while (0) #endif -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - /* * Here we define the default xmit fifo size used for each type of UART. */ @@ -336,27 +334,29 @@ static void default_serial_dl_write(struct uart_8250_port *up, int value) #ifdef CONFIG_SERIAL_8250_RT288X +#define UART_REG_UNMAPPED -1 + /* Au1x00/RT288x UART hardware has a weird register layout */ static const s8 au_io_in_map[8] = { - 0, /* UART_RX */ - 2, /* UART_IER */ - 3, /* UART_IIR */ - 5, /* UART_LCR */ - 6, /* UART_MCR */ - 7, /* UART_LSR */ - 8, /* UART_MSR */ - -1, /* UART_SCR (unmapped) */ + [UART_RX] = 0, + [UART_IER] = 2, + [UART_IIR] = 3, + [UART_LCR] = 5, + [UART_MCR] = 6, + [UART_LSR] = 7, + [UART_MSR] = 8, + [UART_SCR] = UART_REG_UNMAPPED, }; static const s8 au_io_out_map[8] = { - 1, /* UART_TX */ - 2, /* UART_IER */ - 4, /* UART_FCR */ - 5, /* UART_LCR */ - 6, /* UART_MCR */ - -1, /* UART_LSR (unmapped) */ - -1, /* UART_MSR (unmapped) */ - -1, /* UART_SCR (unmapped) */ + [UART_TX] = 1, + [UART_IER] = 2, + [UART_FCR] = 4, + [UART_LCR] = 5, + [UART_MCR] = 6, + [UART_LSR] = UART_REG_UNMAPPED, + [UART_MSR] = UART_REG_UNMAPPED, + [UART_SCR] = UART_REG_UNMAPPED, }; unsigned int au_serial_in(struct uart_port *p, int offset) @@ -364,7 +364,7 @@ unsigned int au_serial_in(struct uart_port *p, int offset) if (offset >= ARRAY_SIZE(au_io_in_map)) return UINT_MAX; offset = au_io_in_map[offset]; - if (offset < 0) + if (offset == UART_REG_UNMAPPED) return UINT_MAX; return __raw_readl(p->membase + (offset << p->regshift)); } @@ -374,7 +374,7 @@ void au_serial_out(struct uart_port *p, int offset, int value) if (offset >= ARRAY_SIZE(au_io_out_map)) return; offset = au_io_out_map[offset]; - if (offset < 0) + if (offset == UART_REG_UNMAPPED) return; __raw_writel(value, p->membase + (offset << p->regshift)); } @@ -647,6 +647,14 @@ void serial8250_em485_destroy(struct uart_8250_port *p) } EXPORT_SYMBOL_GPL(serial8250_em485_destroy); +struct serial_rs485 serial8250_em485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND | + SER_RS485_TERMINATE_BUS | SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; +EXPORT_SYMBOL_GPL(serial8250_em485_supported); + /** * serial8250_em485_config() - generic ->rs485_config() callback * @port: uart port @@ -656,7 +664,8 @@ EXPORT_SYMBOL_GPL(serial8250_em485_destroy); * if the uart is incapable of driving RTS as a Transmit Enable signal in * hardware, relying on software emulation instead. */ -int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485) +int serial8250_em485_config(struct uart_port *port, struct ktermios *termios, + struct serial_rs485 *rs485) { struct uart_8250_port *up = up_to_u8250p(port); @@ -667,29 +676,12 @@ int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485) rs485->flags &= ~SER_RS485_RTS_AFTER_SEND; } - /* clamp the delays to [0, 100ms] */ - rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U); - rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U); - - memset(rs485->padding, 0, sizeof(rs485->padding)); - port->rs485 = *rs485; - - gpiod_set_value(port->rs485_term_gpio, - rs485->flags & SER_RS485_TERMINATE_BUS); - /* * Both serial8250_em485_init() and serial8250_em485_destroy() * are idempotent. */ - if (rs485->flags & SER_RS485_ENABLED) { - int ret = serial8250_em485_init(up); - - if (ret) { - rs485->flags &= ~SER_RS485_ENABLED; - port->rs485.flags &= ~SER_RS485_ENABLED; - } - return ret; - } + if (rs485->flags & SER_RS485_ENABLED) + return serial8250_em485_init(up); serial8250_em485_destroy(up); return 0; @@ -849,7 +841,7 @@ static int size_fifo(struct uart_8250_port *up) serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); old_dl = serial_dl_read(up); serial_dl_write(up, 0x0001); - serial_out(up, UART_LCR, 0x03); + serial_out(up, UART_LCR, UART_LCR_WLEN8); for (count = 0; count < 256; count++) serial_out(up, UART_TX, count); mdelay(20);/* FIXME - schedule_timeout */ @@ -1503,18 +1495,12 @@ static void __stop_tx_rs485(struct uart_8250_port *p, u64 stop_delay) } } -static inline void __do_stop_tx(struct uart_8250_port *p) -{ - if (serial8250_clear_THRI(p)) - serial8250_rpm_put_tx(p); -} - static inline void __stop_tx(struct uart_8250_port *p) { struct uart_8250_em485 *em485 = p->em485; if (em485) { - unsigned char lsr = serial_in(p, UART_LSR); + u16 lsr = serial_lsr_in(p); u64 stop_delay = 0; p->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; @@ -1522,7 +1508,7 @@ static inline void __stop_tx(struct uart_8250_port *p) if (!(lsr & UART_LSR_THRE)) return; /* - * To provide required timeing and allow FIFO transfer, + * To provide required timing and allow FIFO transfer, * __stop_tx_rs485() must be called only when both FIFO and * shift register are empty. The device driver should either * enable interrupt on TEMT or set UART_CAP_NOTEMT that will @@ -1544,7 +1530,9 @@ static inline void __stop_tx(struct uart_8250_port *p) __stop_tx_rs485(p, stop_delay); } - __do_stop_tx(p); + + if (serial8250_clear_THRI(p)) + serial8250_rpm_put_tx(p); } static void serial8250_stop_tx(struct uart_port *port) @@ -1573,10 +1561,8 @@ static inline void __start_tx(struct uart_port *port) if (serial8250_set_THRI(up)) { if (up->bugs & UART_BUG_TXEN) { - unsigned char lsr; + u16 lsr = serial_lsr_in(up); - lsr = serial_in(up, UART_LSR); - up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; if (lsr & UART_LSR_THRE) serial8250_tx_chars(up); } @@ -1616,7 +1602,8 @@ void serial8250_em485_start_tx(struct uart_8250_port *up) } EXPORT_SYMBOL_GPL(serial8250_em485_start_tx); -static inline void start_tx_rs485(struct uart_port *port) +/* Returns false, if start_tx_timer was setup to defer TX start */ +static bool start_tx_rs485(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); struct uart_8250_em485 *em485 = up->em485; @@ -1644,11 +1631,11 @@ static inline void start_tx_rs485(struct uart_port *port) em485->active_timer = &em485->start_tx_timer; start_hrtimer_ms(&em485->start_tx_timer, up->port.rs485.delay_rts_before_send); - return; + return false; } } - __start_tx(port); + return true; } static enum hrtimer_restart serial8250_em485_handle_start_tx(struct hrtimer *t) @@ -1678,14 +1665,12 @@ static void serial8250_start_tx(struct uart_port *port) serial8250_rpm_get_tx(up); - if (em485 && - em485->active_timer == &em485->start_tx_timer) - return; - - if (em485) - start_tx_rs485(port); - else - __start_tx(port); + if (em485) { + if ((em485->active_timer == &em485->start_tx_timer) || + !start_tx_rs485(port)) + return; + } + __start_tx(port); } static void serial8250_throttle(struct uart_port *port) @@ -1729,7 +1714,7 @@ static void serial8250_enable_ms(struct uart_port *port) serial8250_rpm_put(up); } -void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr) +void serial8250_read_char(struct uart_8250_port *up, u16 lsr) { struct uart_port *port = &up->port; unsigned char ch; @@ -1792,11 +1777,13 @@ void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr) EXPORT_SYMBOL_GPL(serial8250_read_char); /* - * serial8250_rx_chars: processes according to the passed in LSR - * value, and returns the remaining LSR bits not handled - * by this Rx routine. + * serial8250_rx_chars - Read characters. The first LSR value must be passed in. + * + * Returns LSR bits. The caller should rely only on non-Rx related LSR bits + * (such as THRE) because the LSR value might come from an already consumed + * character. */ -unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr) +u16 serial8250_rx_chars(struct uart_8250_port *up, u16 lsr) { struct uart_port *port = &up->port; int max_count = 256; @@ -1852,7 +1839,7 @@ void serial8250_tx_chars(struct uart_8250_port *up) if (uart_circ_empty(xmit)) break; if ((up->capabilities & UART_CAP_HFIFO) && - (serial_in(up, UART_LSR) & BOTH_EMPTY) != BOTH_EMPTY) + !uart_lsr_tx_empty(serial_in(up, UART_LSR))) break; /* The BCM2835 MINI UART THRE bit is really a not-full bit. */ if ((up->capabilities & UART_CAP_MINI) && @@ -1916,17 +1903,17 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir) */ int serial8250_handle_irq(struct uart_port *port, unsigned int iir) { - unsigned char status; struct uart_8250_port *up = up_to_u8250p(port); bool skip_rx = false; unsigned long flags; + u16 status; if (iir & UART_IIR_NO_INT) return 0; spin_lock_irqsave(&port->lock, flags); - status = serial_port_in(port, UART_LSR); + status = serial_lsr_in(up); /* * If port is stopped and there are no error conditions in the @@ -2002,18 +1989,17 @@ static unsigned int serial8250_tx_empty(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; - unsigned int lsr; + u16 lsr; serial8250_rpm_get(up); spin_lock_irqsave(&port->lock, flags); - lsr = serial_port_in(port, UART_LSR); - up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; + lsr = serial_lsr_in(up); spin_unlock_irqrestore(&port->lock, flags); serial8250_rpm_put(up); - return (lsr & BOTH_EMPTY) == BOTH_EMPTY ? TIOCSER_TEMT : 0; + return uart_lsr_tx_empty(lsr) ? TIOCSER_TEMT : 0; } unsigned int serial8250_do_get_mctrl(struct uart_port *port) @@ -2084,9 +2070,7 @@ static void wait_for_lsr(struct uart_8250_port *up, int bits) /* Wait up to 10ms for the character(s) to be sent. */ for (;;) { - status = serial_in(up, UART_LSR); - - up->lsr_saved_flags |= status & LSR_SAVE_FLAGS; + status = serial_lsr_in(up); if ((status & bits) == bits) break; @@ -2128,8 +2112,8 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits) static int serial8250_get_poll_char(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); - unsigned char lsr; int status; + u16 lsr; serial8250_rpm_get(up); @@ -2163,7 +2147,7 @@ static void serial8250_put_poll_char(struct uart_port *port, else serial_port_out(port, UART_IER, 0); - wait_for_xmitr(up, BOTH_EMPTY); + wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); /* * Send the character out. */ @@ -2173,7 +2157,7 @@ static void serial8250_put_poll_char(struct uart_port *port, * Finally, wait for transmitter to become empty * and restore the IER */ - wait_for_xmitr(up, BOTH_EMPTY); + wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); serial_port_out(port, UART_IER, ier); serial8250_rpm_put(up); } @@ -2184,8 +2168,9 @@ int serial8250_do_startup(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; - unsigned char lsr, iir; + unsigned char iir; int retval; + u16 lsr; if (!port->fifosize) port->fifosize = uart_config[port->type].fifo_size; @@ -2810,7 +2795,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, port->read_status_mask |= UART_LSR_BI; /* - * Characteres to ignore + * Characters to ignore */ port->ignore_status_mask = 0; if (termios->c_iflag & IGNPAR) @@ -3203,7 +3188,7 @@ static void serial8250_config_port(struct uart_port *port, int flags) autoconfig(up); if (port->rs485.flags & SER_RS485_ENABLED) - port->rs485_config(port, &port->rs485); + uart_rs485_config(port); /* if access method is AU, it is a 16550 with a quirk */ if (port->type == PORT_16550A && port->iotype == UPIO_AU) @@ -3445,7 +3430,7 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s, * Finally, wait for transmitter to become empty * and restore the IER */ - wait_for_xmitr(up, BOTH_EMPTY); + wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); if (em485) { mdelay(port->rs485.delay_rts_after_send); diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index fdb6c4188695..d0b49e15fbf5 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -254,6 +254,7 @@ config SERIAL_8250_ASPEED_VUART depends on SERIAL_8250 depends on OF depends on REGMAP && MFD_SYSCON + depends on ARCH_ASPEED || COMPILE_TEST help If you want to use the virtual UART (VUART) device on Aspeed BMC platforms, enable this option. This enables the 16550A- diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 7172cd1792df..877173907c53 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -324,6 +324,7 @@ config SERIAL_MAX310X depends on SPI_MASTER select SERIAL_CORE select REGMAP_SPI if SPI_MASTER + select REGMAP_I2C if I2C help This selects support for an advanced UART from Maxim (Dallas). Supported ICs are MAX3107, MAX3108, MAX3109, MAX14830. @@ -889,23 +890,6 @@ config SERIAL_TXX9_STDSERIAL bool "TX39XX/49XX SIO act as standard serial" depends on !SERIAL_8250 && SERIAL_TXX9 -config SERIAL_VR41XX - tristate "NEC VR4100 series Serial Interface Unit support" - depends on CPU_VR41XX - select SERIAL_CORE - help - If you have a NEC VR4100 series processor and you want to use - Serial Interface Unit(SIU) or Debug Serial Interface Unit(DSIU) - (not include VR4111/VR4121 DSIU), say Y. Otherwise, say N. - -config SERIAL_VR41XX_CONSOLE - bool "Enable NEC VR4100 series Serial Interface Unit console" - depends on SERIAL_VR41XX=y - select SERIAL_CORE_CONSOLE - help - If you have a NEC VR4100 series processor and you want to use - a console on a serial port, say Y. Otherwise, say N. - config SERIAL_JSM tristate "Digi International NEO and Classic PCI Support" depends on PCI diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 61cc8de95571..238a9557b487 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -51,7 +51,6 @@ obj-$(CONFIG_SERIAL_SCCNXP) += sccnxp.o obj-$(CONFIG_SERIAL_SC16IS7XX_CORE) += sc16is7xx.o obj-$(CONFIG_SERIAL_JSM) += jsm/ obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o -obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o obj-$(CONFIG_SERIAL_MSM) += msm_serial.o diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 16a21422ddce..15f0e4d88c5a 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -2214,7 +2214,7 @@ static int pl011_verify_port(struct uart_port *port, struct serial_struct *ser) return ret; } -static int pl011_rs485_config(struct uart_port *port, +static int pl011_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct uart_amba_port *uap = @@ -2700,17 +2700,12 @@ static int pl011_find_free_port(void) static int pl011_get_rs485_mode(struct uart_amba_port *uap) { struct uart_port *port = &uap->port; - struct serial_rs485 *rs485 = &port->rs485; int ret; ret = uart_get_rs485_mode(port); if (ret) return ret; - /* clamp the delays to [0, 100ms] */ - rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U); - rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U); - return 0; } @@ -2770,6 +2765,13 @@ static int pl011_register_port(struct uart_amba_port *uap) return ret; } +static const struct serial_rs485 pl011_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND | + SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + static int pl011_probe(struct amba_device *dev, const struct amba_id *id) { struct uart_amba_port *uap; @@ -2796,6 +2798,7 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) uap->port.irq = dev->irq[0]; uap->port.ops = &amba_pl011_pops; uap->port.rs485_config = pl011_rs485_config; + uap->port.rs485_supported = pl011_rs485_supported; snprintf(uap->type, sizeof(uap->type), "PL011 rev%u", amba_rev(dev)); ret = pl011_setup_port(&dev->dev, uap, &dev->res, portnr); diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 6269dbf93546..32caeac12985 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -580,18 +580,9 @@ static const struct uart_ops ar933x_uart_ops = { .verify_port = ar933x_uart_verify_port, }; -static int ar933x_config_rs485(struct uart_port *port, +static int ar933x_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485conf) { - struct ar933x_uart_port *up = - container_of(port, struct ar933x_uart_port, port); - - if ((rs485conf->flags & SER_RS485_ENABLED) && - !up->rts_gpiod) { - dev_err(port->dev, "RS485 needs rts-gpio\n"); - return 1; - } - port->rs485 = *rs485conf; return 0; } @@ -702,6 +693,11 @@ static struct uart_driver ar933x_uart_driver = { .cons = NULL, /* filled in runtime */ }; +static const struct serial_rs485 ar933x_no_rs485 = {}; +static const struct serial_rs485 ar933x_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, +}; + static int ar933x_uart_probe(struct platform_device *pdev) { struct ar933x_uart_port *up; @@ -773,6 +769,7 @@ static int ar933x_uart_probe(struct platform_device *pdev) port->fifosize = AR933X_UART_FIFO_SIZE; port->ops = &ar933x_uart_ops; port->rs485_config = ar933x_config_rs485; + port->rs485_supported = ar933x_rs485_supported; baud = ar933x_uart_get_baud(port->uartclk, AR933X_UART_MAX_SCALE, 1); up->min_baud = max_t(unsigned int, baud, AR933X_UART_MIN_BAUD); @@ -792,10 +789,12 @@ static int ar933x_uart_probe(struct platform_device *pdev) up->rts_gpiod = mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS); - if ((port->rs485.flags & SER_RS485_ENABLED) && - !up->rts_gpiod) { - dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n"); - port->rs485.flags &= ~SER_RS485_ENABLED; + if (!up->rts_gpiod) { + port->rs485_supported = ar933x_no_rs485; + if (port->rs485.flags & SER_RS485_ENABLED) { + dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n"); + port->rs485.flags &= ~SER_RS485_ENABLED; + } } #ifdef CONFIG_SERIAL_AR933X_CONSOLE diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index dd1c7e4bd1c9..30ba9eef7b39 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -166,7 +166,6 @@ struct atmel_uart_port { unsigned int fidi_min; unsigned int fidi_max; -#ifdef CONFIG_PM struct { u32 cr; u32 mr; @@ -177,7 +176,6 @@ struct atmel_uart_port { u32 fmr; u32 fimr; } cache; -#endif int (*prepare_rx)(struct uart_port *port); int (*prepare_tx)(struct uart_port *port); @@ -285,7 +283,7 @@ static void atmel_tasklet_schedule(struct atmel_uart_port *atmel_port, } /* Enable or disable the rs485 support */ -static int atmel_config_rs485(struct uart_port *port, +static int atmel_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485conf) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); @@ -2473,6 +2471,12 @@ static const struct uart_ops atmel_pops = { #endif }; +static const struct serial_rs485 atmel_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_AFTER_SEND | SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + /* * Configure the port from the platform device resource info. */ @@ -2494,6 +2498,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, port->mapbase = mpdev->resource[0].start; port->irq = platform_get_irq(mpdev, 0); port->rs485_config = atmel_config_rs485; + port->rs485_supported = atmel_rs485_supported; port->iso7816_config = atmel_config_iso7816; port->membase = NULL; @@ -2503,24 +2508,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, if (ret) return ret; - /* for console, the clock could already be configured */ - if (!atmel_port->clk) { - atmel_port->clk = clk_get(&mpdev->dev, "usart"); - if (IS_ERR(atmel_port->clk)) { - ret = PTR_ERR(atmel_port->clk); - atmel_port->clk = NULL; - return ret; - } - ret = clk_prepare_enable(atmel_port->clk); - if (ret) { - clk_put(atmel_port->clk); - atmel_port->clk = NULL; - return ret; - } - port->uartclk = clk_get_rate(atmel_port->clk); - clk_disable_unprepare(atmel_port->clk); - /* only enable clock when USART is in use */ - } + port->uartclk = clk_get_rate(atmel_port->clk); /* * Use TXEMPTY for interrupt when rs485 or ISO7816 else TXRDY or @@ -2629,7 +2617,6 @@ static void __init atmel_console_get_options(struct uart_port *port, int *baud, static int __init atmel_console_setup(struct console *co, char *options) { - int ret; struct uart_port *port = &atmel_ports[co->index].uart; struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); int baud = 115200; @@ -2642,10 +2629,6 @@ static int __init atmel_console_setup(struct console *co, char *options) return -ENODEV; } - ret = clk_prepare_enable(atmel_ports[co->index].clk); - if (ret) - return ret; - atmel_uart_writel(port, ATMEL_US_IDR, -1); atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX); atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN); @@ -2711,7 +2694,6 @@ static struct uart_driver atmel_uart = { .cons = ATMEL_CONSOLE_DEVICE, }; -#ifdef CONFIG_PM static bool atmel_serial_clk_will_stop(void) { #ifdef CONFIG_ARCH_AT91 @@ -2721,10 +2703,9 @@ static bool atmel_serial_clk_will_stop(void) #endif } -static int atmel_serial_suspend(struct platform_device *pdev, - pm_message_t state) +static int __maybe_unused atmel_serial_suspend(struct device *dev) { - struct uart_port *port = platform_get_drvdata(pdev); + struct uart_port *port = dev_get_drvdata(dev); struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); if (uart_console(port) && console_suspend_enabled) { @@ -2749,14 +2730,14 @@ static int atmel_serial_suspend(struct platform_device *pdev, } /* we can not wake up if we're running on slow clock */ - atmel_port->may_wakeup = device_may_wakeup(&pdev->dev); + atmel_port->may_wakeup = device_may_wakeup(dev); if (atmel_serial_clk_will_stop()) { unsigned long flags; spin_lock_irqsave(&atmel_port->lock_suspended, flags); atmel_port->suspended = true; spin_unlock_irqrestore(&atmel_port->lock_suspended, flags); - device_set_wakeup_enable(&pdev->dev, 0); + device_set_wakeup_enable(dev, 0); } uart_suspend_port(&atmel_uart, port); @@ -2764,9 +2745,9 @@ static int atmel_serial_suspend(struct platform_device *pdev, return 0; } -static int atmel_serial_resume(struct platform_device *pdev) +static int __maybe_unused atmel_serial_resume(struct device *dev) { - struct uart_port *port = platform_get_drvdata(pdev); + struct uart_port *port = dev_get_drvdata(dev); struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); unsigned long flags; @@ -2801,14 +2782,10 @@ static int atmel_serial_resume(struct platform_device *pdev) spin_unlock_irqrestore(&atmel_port->lock_suspended, flags); uart_resume_port(&atmel_uart, port); - device_set_wakeup_enable(&pdev->dev, atmel_port->may_wakeup); + device_set_wakeup_enable(dev, atmel_port->may_wakeup); return 0; } -#else -#define atmel_serial_suspend NULL -#define atmel_serial_resume NULL -#endif static void atmel_serial_probe_fifos(struct atmel_uart_port *atmel_port, struct platform_device *pdev) @@ -2897,14 +2874,23 @@ static int atmel_serial_probe(struct platform_device *pdev) atomic_set(&atmel_port->tasklet_shutdown, 0); spin_lock_init(&atmel_port->lock_suspended); + atmel_port->clk = devm_clk_get(&pdev->dev, "usart"); + if (IS_ERR(atmel_port->clk)) { + ret = PTR_ERR(atmel_port->clk); + goto err; + } + ret = clk_prepare_enable(atmel_port->clk); + if (ret) + goto err; + ret = atmel_init_port(atmel_port, pdev); if (ret) - goto err_clear_bit; + goto err_clk_disable_unprepare; atmel_port->gpios = mctrl_gpio_init(&atmel_port->uart, 0); if (IS_ERR(atmel_port->gpios)) { ret = PTR_ERR(atmel_port->gpios); - goto err_clear_bit; + goto err_clk_disable_unprepare; } if (!atmel_use_pdc_rx(&atmel_port->uart)) { @@ -2913,7 +2899,7 @@ static int atmel_serial_probe(struct platform_device *pdev) sizeof(struct atmel_uart_char), GFP_KERNEL); if (!data) - goto err_alloc_ring; + goto err_clk_disable_unprepare; atmel_port->rx_ring.buf = data; } @@ -2923,26 +2909,9 @@ static int atmel_serial_probe(struct platform_device *pdev) if (ret) goto err_add_port; -#ifdef CONFIG_SERIAL_ATMEL_CONSOLE - if (uart_console(&atmel_port->uart) - && ATMEL_CONSOLE_DEVICE->flags & CON_ENABLED) { - /* - * The serial core enabled the clock for us, so undo - * the clk_prepare_enable() in atmel_console_setup() - */ - clk_disable_unprepare(atmel_port->clk); - } -#endif - device_init_wakeup(&pdev->dev, 1); platform_set_drvdata(pdev, atmel_port); - /* - * The peripheral clock has been disabled by atmel_init_port(): - * enable it before accessing I/O registers - */ - clk_prepare_enable(atmel_port->clk); - if (rs485_enabled) { atmel_uart_writel(&atmel_port->uart, ATMEL_US_MR, ATMEL_US_USMODE_NORMAL); @@ -2966,12 +2935,8 @@ static int atmel_serial_probe(struct platform_device *pdev) err_add_port: kfree(atmel_port->rx_ring.buf); atmel_port->rx_ring.buf = NULL; -err_alloc_ring: - if (!uart_console(&atmel_port->uart)) { - clk_put(atmel_port->clk); - atmel_port->clk = NULL; - } -err_clear_bit: +err_clk_disable_unprepare: + clk_disable_unprepare(atmel_port->clk); clear_bit(atmel_port->uart.line, atmel_ports_in_use); err: return ret; @@ -3005,21 +2970,21 @@ static int atmel_serial_remove(struct platform_device *pdev) clear_bit(port->line, atmel_ports_in_use); - clk_put(atmel_port->clk); - atmel_port->clk = NULL; pdev->dev.of_node = NULL; return ret; } +static SIMPLE_DEV_PM_OPS(atmel_serial_pm_ops, atmel_serial_suspend, + atmel_serial_resume); + static struct platform_driver atmel_serial_driver = { .probe = atmel_serial_probe, .remove = atmel_serial_remove, - .suspend = atmel_serial_suspend, - .resume = atmel_serial_resume, .driver = { .name = "atmel_usart_serial", .of_match_table = of_match_ptr(atmel_serial_dt_ids), + .pm = pm_ptr(&atmel_serial_pm_ops), }, }; diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index 57c70851f22a..88d08ba1ca83 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -253,6 +253,9 @@ int __init of_setup_earlycon(const struct earlycon_id *match, bool big_endian; u64 addr; + if (early_con.flags & CON_ENABLED) + return -EALREADY; + spin_lock_init(&port->lock); port->iotype = UPIO_MEM; addr = of_flat_dt_translate_address(node); diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 0d6e62f6bb07..f6c33cd228c8 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -274,6 +274,8 @@ struct lpuart_port { int rx_dma_rng_buf_len; unsigned int dma_tx_nents; wait_queue_head_t dma_wait; + bool is_cs7; /* Set to true when character size is 7 */ + /* and the parity is enabled */ }; struct lpuart_soc_data { @@ -990,12 +992,12 @@ static void lpuart32_rxint(struct lpuart_port *sport) if (sr & (UARTSTAT_PE | UARTSTAT_OR | UARTSTAT_FE)) { if (sr & UARTSTAT_PE) { + sport->port.icount.parity++; + } else if (sr & UARTSTAT_FE) { if (is_break) sport->port.icount.brk++; else - sport->port.icount.parity++; - } else if (sr & UARTSTAT_FE) { - sport->port.icount.frame++; + sport->port.icount.frame++; } if (sr & UARTSTAT_OR) @@ -1010,18 +1012,21 @@ static void lpuart32_rxint(struct lpuart_port *sport) sr &= sport->port.read_status_mask; if (sr & UARTSTAT_PE) { + flg = TTY_PARITY; + } else if (sr & UARTSTAT_FE) { if (is_break) flg = TTY_BREAK; else - flg = TTY_PARITY; - } else if (sr & UARTSTAT_FE) { - flg = TTY_FRAME; + flg = TTY_FRAME; } if (sr & UARTSTAT_OR) flg = TTY_OVERRUN; } + if (sport->is_cs7) + rx &= 0x7F; + if (tty_insert_flip_char(port, rx, flg) == 0) sport->port.icount.buf_overrun++; } @@ -1107,6 +1112,17 @@ static void lpuart_handle_sysrq(struct lpuart_port *sport) } } +static int lpuart_tty_insert_flip_string(struct tty_port *port, + unsigned char *chars, size_t size, bool is_cs7) +{ + int i; + + if (is_cs7) + for (i = 0; i < size; i++) + chars[i] &= 0x7F; + return tty_insert_flip_string(port, chars, size); +} + static void lpuart_copy_rx_to_tty(struct lpuart_port *sport) { struct tty_port *port = &sport->port.state->port; @@ -1217,7 +1233,8 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport) if (ring->head < ring->tail) { count = sport->rx_sgl.length - ring->tail; - copied = tty_insert_flip_string(port, ring->buf + ring->tail, count); + copied = lpuart_tty_insert_flip_string(port, ring->buf + ring->tail, + count, sport->is_cs7); if (copied != count) sport->port.icount.buf_overrun++; ring->tail = 0; @@ -1227,7 +1244,8 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport) /* Finally we read data from tail to head */ if (ring->tail < ring->head) { count = ring->head - ring->tail; - copied = tty_insert_flip_string(port, ring->buf + ring->tail, count); + copied = lpuart_tty_insert_flip_string(port, ring->buf + ring->tail, + count, sport->is_cs7); if (copied != count) sport->port.icount.buf_overrun++; /* Wrap ring->head if needed */ @@ -1355,7 +1373,7 @@ static void lpuart_dma_rx_free(struct uart_port *port) sport->dma_rx_cookie = -EINVAL; } -static int lpuart_config_rs485(struct uart_port *port, +static int lpuart_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct lpuart_port *sport = container_of(port, @@ -1365,11 +1383,6 @@ static int lpuart_config_rs485(struct uart_port *port, ~(UARTMODEM_TXRTSPOL | UARTMODEM_TXRTSE); writeb(modem, sport->port.membase + UARTMODEM); - /* clear unsupported configurations */ - rs485->delay_rts_before_send = 0; - rs485->delay_rts_after_send = 0; - rs485->flags &= ~SER_RS485_RX_DURING_TX; - if (rs485->flags & SER_RS485_ENABLED) { /* Enable auto RS-485 RTS mode */ modem |= UARTMODEM_TXRTSE; @@ -1390,7 +1403,7 @@ static int lpuart_config_rs485(struct uart_port *port, return 0; } -static int lpuart32_config_rs485(struct uart_port *port, +static int lpuart32_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct lpuart_port *sport = container_of(port, @@ -1400,11 +1413,6 @@ static int lpuart32_config_rs485(struct uart_port *port, & ~(UARTMODEM_TXRTSPOL | UARTMODEM_TXRTSE); lpuart32_write(&sport->port, modem, UARTMODIR); - /* clear unsupported configurations */ - rs485->delay_rts_before_send = 0; - rs485->delay_rts_after_send = 0; - rs485->flags &= ~SER_RS485_RX_DURING_TX; - if (rs485->flags & SER_RS485_ENABLED) { /* Enable auto RS-485 RTS mode */ modem |= UARTMODEM_TXRTSE; @@ -2076,6 +2084,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios, ctrl = old_ctrl = lpuart32_read(&sport->port, UARTCTRL); bd = lpuart32_read(&sport->port, UARTBAUD); modem = lpuart32_read(&sport->port, UARTMODIR); + sport->is_cs7 = false; /* * only support CS8 and CS7, and for CS7 must enable PE. * supported mode: @@ -2194,6 +2203,9 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios, lpuart32_write(&sport->port, ctrl, UARTCTRL); /* restore control register */ + if ((ctrl & (UARTCTRL_PE | UARTCTRL_M)) == UARTCTRL_PE) + sport->is_cs7 = true; + if (old && sport->lpuart_dma_rx_use) { if (!lpuart_start_rx_dma(sport)) rx_dma_timer_init(sport); @@ -2621,6 +2633,11 @@ static struct uart_driver lpuart_reg = { .cons = LPUART_CONSOLE, }; +static const struct serial_rs485 lpuart_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, + /* delay_rts_* and RX_DURING_TX are not supported */ +}; + static int lpuart_probe(struct platform_device *pdev) { const struct lpuart_soc_data *sdata = of_device_get_match_data(&pdev->dev); @@ -2660,6 +2677,7 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.rs485_config = lpuart32_config_rs485; else sport->port.rs485_config = lpuart_config_rs485; + sport->port.rs485_supported = lpuart_rs485_supported; sport->ipg_clk = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(sport->ipg_clk)) { @@ -2717,14 +2735,7 @@ static int lpuart_probe(struct platform_device *pdev) if (ret) goto failed_get_rs485; - if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX) - dev_err(&pdev->dev, "driver doesn't support RX during TX\n"); - - if (sport->port.rs485.delay_rts_before_send || - sport->port.rs485.delay_rts_after_send) - dev_err(&pdev->dev, "driver doesn't support RTS delays\n"); - - sport->port.rs485_config(&sport->port, &sport->port.rs485); + uart_rs485_config(&sport->port); ret = devm_request_irq(&pdev->dev, sport->port.irq, handler, 0, DRIVER_NAME, sport); diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 30edb35a6a15..522445a8f666 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1907,16 +1907,12 @@ static void imx_uart_poll_put_char(struct uart_port *port, unsigned char c) #endif /* called with port.lock taken and irqs off or from .probe without locking */ -static int imx_uart_rs485_config(struct uart_port *port, +static int imx_uart_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485conf) { struct imx_port *sport = (struct imx_port *)port; u32 ucr2; - /* RTS is required to control the transmitter */ - if (!sport->have_rtscts && !sport->have_rtsgpio) - rs485conf->flags &= ~SER_RS485_ENABLED; - if (rs485conf->flags & SER_RS485_ENABLED) { /* Enable receiver if low-active RTS signal is requested */ if (sport->have_rtscts && !sport->have_rtsgpio && @@ -2200,6 +2196,14 @@ static enum hrtimer_restart imx_trigger_stop_tx(struct hrtimer *t) return HRTIMER_NORESTART; } +static const struct serial_rs485 imx_no_rs485 = {}; /* No RS485 if no RTS */ +static const struct serial_rs485 imx_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND | + SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + /* Default RX DMA buffer configuration */ #define RX_DMA_PERIODS 16 #define RX_DMA_PERIOD_LEN (PAGE_SIZE / 4) @@ -2279,6 +2283,11 @@ static int imx_uart_probe(struct platform_device *pdev) sport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_IMX_CONSOLE); sport->port.ops = &imx_uart_pops; sport->port.rs485_config = imx_uart_rs485_config; + /* RTS is required to control the RS485 transmitter */ + if (sport->have_rtscts || sport->have_rtsgpio) + sport->port.rs485_supported = imx_rs485_supported; + else + sport->port.rs485_supported = imx_no_rs485; sport->port.flags = UPF_BOOT_AUTOCONF; timer_setup(&sport->timer, imx_uart_timeout, 0); @@ -2338,7 +2347,7 @@ static int imx_uart_probe(struct platform_device *pdev) dev_err(&pdev->dev, "low-active RTS not possible when receiver is off, enabling receiver\n"); - imx_uart_rs485_config(&sport->port, &sport->port.rs485); + uart_rs485_config(&sport->port); /* Disable interrupts before requesting them */ ucr1 = imx_uart_readl(sport, UCR1); diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c index 79b7db8580e0..7aa37be3216a 100644 --- a/drivers/tty/serial/kgdboc.c +++ b/drivers/tty/serial/kgdboc.c @@ -342,7 +342,7 @@ static int param_set_kgdboc_var(const char *kmessage, /* * Configure with the new params as long as init already ran. * Note that we can get called before init if someone loads us - * with "modprobe kgdboc kgdboc=..." or if they happen to use the + * with "modprobe kgdboc kgdboc=..." or if they happen to use * the odd syntax of "kgdboc.kgdboc=..." on the kernel command. */ if (configured >= 0) diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index a0b6ea52d133..ab10ca4a45b5 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -14,6 +14,7 @@ #include <linux/delay.h> #include <linux/device.h> #include <linux/gpio/driver.h> +#include <linux/i2c.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> @@ -72,7 +73,8 @@ #define MAX310X_GLOBALCMD_REG MAX310X_REG_1F /* Global Command (WO) */ /* Extended registers */ -#define MAX310X_REVID_EXTREG MAX310X_REG_05 /* Revision ID */ +#define MAX310X_SPI_REVID_EXTREG MAX310X_REG_05 /* Revision ID */ +#define MAX310X_I2C_REVID_EXTREG (0x25) /* Revision ID */ /* IRQ register bits */ #define MAX310X_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ @@ -245,7 +247,17 @@ #define MAX14830_BRGCFG_CLKDIS_BIT (1 << 6) /* Clock Disable */ #define MAX14830_REV_ID (0xb0) +struct max310x_if_cfg { + int (*extended_reg_enable)(struct device *dev, bool enable); + + unsigned int rev_id_reg; +}; + struct max310x_devtype { + struct { + unsigned short min; + unsigned short max; + } slave_addr; char name[9]; int nr; u8 mode1; @@ -258,9 +270,8 @@ struct max310x_one { struct work_struct tx_work; struct work_struct md_work; struct work_struct rs_work; + struct regmap *regmap; - u8 wr_header; - u8 rd_header; u8 rx_buf[MAX310X_FIFO_SIZE]; }; #define to_max310x_port(_port) \ @@ -268,6 +279,7 @@ struct max310x_one { struct max310x_port { const struct max310x_devtype *devtype; + const struct max310x_if_cfg *if_cfg; struct regmap *regmap; struct clk *clk; #ifdef CONFIG_GPIOLIB @@ -289,26 +301,26 @@ static DECLARE_BITMAP(max310x_lines, MAX310X_UART_NRMAX); static u8 max310x_port_read(struct uart_port *port, u8 reg) { - struct max310x_port *s = dev_get_drvdata(port->dev); + struct max310x_one *one = to_max310x_port(port); unsigned int val = 0; - regmap_read(s->regmap, port->iobase + reg, &val); + regmap_read(one->regmap, reg, &val); return val; } static void max310x_port_write(struct uart_port *port, u8 reg, u8 val) { - struct max310x_port *s = dev_get_drvdata(port->dev); + struct max310x_one *one = to_max310x_port(port); - regmap_write(s->regmap, port->iobase + reg, val); + regmap_write(one->regmap, reg, val); } static void max310x_port_update(struct uart_port *port, u8 reg, u8 mask, u8 val) { - struct max310x_port *s = dev_get_drvdata(port->dev); + struct max310x_one *one = to_max310x_port(port); - regmap_update_bits(s->regmap, port->iobase + reg, mask, val); + regmap_update_bits(one->regmap, reg, mask, val); } static int max3107_detect(struct device *dev) @@ -357,13 +369,12 @@ static int max3109_detect(struct device *dev) unsigned int val = 0; int ret; - ret = regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, - MAX310X_EXTREG_ENBL); + ret = s->if_cfg->extended_reg_enable(dev, true); if (ret) return ret; - regmap_read(s->regmap, MAX310X_REVID_EXTREG, &val); - regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, MAX310X_EXTREG_DSBL); + regmap_read(s->regmap, s->if_cfg->rev_id_reg, &val); + s->if_cfg->extended_reg_enable(dev, false); if (((val & MAX310x_REV_MASK) != MAX3109_REV_ID)) { dev_err(dev, "%s ID 0x%02x does not match\n", s->devtype->name, val); @@ -388,13 +399,12 @@ static int max14830_detect(struct device *dev) unsigned int val = 0; int ret; - ret = regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, - MAX310X_EXTREG_ENBL); + ret = s->if_cfg->extended_reg_enable(dev, true); if (ret) return ret; - regmap_read(s->regmap, MAX310X_REVID_EXTREG, &val); - regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, MAX310X_EXTREG_DSBL); + regmap_read(s->regmap, s->if_cfg->rev_id_reg, &val); + s->if_cfg->extended_reg_enable(dev, false); if (((val & MAX310x_REV_MASK) != MAX14830_REV_ID)) { dev_err(dev, "%s ID 0x%02x does not match\n", s->devtype->name, val); @@ -419,6 +429,10 @@ static const struct max310x_devtype max3107_devtype = { .mode1 = MAX310X_MODE1_AUTOSLEEP_BIT | MAX310X_MODE1_IRQSEL_BIT, .detect = max3107_detect, .power = max310x_power, + .slave_addr = { + .min = 0x2c, + .max = 0x2f, + }, }; static const struct max310x_devtype max3108_devtype = { @@ -427,6 +441,10 @@ static const struct max310x_devtype max3108_devtype = { .mode1 = MAX310X_MODE1_AUTOSLEEP_BIT, .detect = max3108_detect, .power = max310x_power, + .slave_addr = { + .min = 0x60, + .max = 0x6f, + }, }; static const struct max310x_devtype max3109_devtype = { @@ -435,6 +453,10 @@ static const struct max310x_devtype max3109_devtype = { .mode1 = MAX310X_MODE1_AUTOSLEEP_BIT, .detect = max3109_detect, .power = max310x_power, + .slave_addr = { + .min = 0x60, + .max = 0x6f, + }, }; static const struct max310x_devtype max14830_devtype = { @@ -443,11 +465,15 @@ static const struct max310x_devtype max14830_devtype = { .mode1 = MAX310X_MODE1_IRQSEL_BIT, .detect = max14830_detect, .power = max14830_power, + .slave_addr = { + .min = 0x60, + .max = 0x6f, + }, }; static bool max310x_reg_writeable(struct device *dev, unsigned int reg) { - switch (reg & 0x1f) { + switch (reg) { case MAX310X_IRQSTS_REG: case MAX310X_LSR_IRQSTS_REG: case MAX310X_SPCHR_IRQSTS_REG: @@ -464,7 +490,7 @@ static bool max310x_reg_writeable(struct device *dev, unsigned int reg) static bool max310x_reg_volatile(struct device *dev, unsigned int reg) { - switch (reg & 0x1f) { + switch (reg) { case MAX310X_RHR_REG: case MAX310X_IRQSTS_REG: case MAX310X_LSR_IRQSTS_REG: @@ -486,7 +512,7 @@ static bool max310x_reg_volatile(struct device *dev, unsigned int reg) static bool max310x_reg_precious(struct device *dev, unsigned int reg) { - switch (reg & 0x1f) { + switch (reg) { case MAX310X_RHR_REG: case MAX310X_IRQSTS_REG: case MAX310X_SPCHR_IRQSTS_REG: @@ -624,31 +650,15 @@ static u32 max310x_set_ref_clk(struct device *dev, struct max310x_port *s, static void max310x_batch_write(struct uart_port *port, u8 *txbuf, unsigned int len) { struct max310x_one *one = to_max310x_port(port); - struct spi_transfer xfer[] = { - { - .tx_buf = &one->wr_header, - .len = sizeof(one->wr_header), - }, { - .tx_buf = txbuf, - .len = len, - } - }; - spi_sync_transfer(to_spi_device(port->dev), xfer, ARRAY_SIZE(xfer)); + + regmap_raw_write(one->regmap, MAX310X_THR_REG, txbuf, len); } static void max310x_batch_read(struct uart_port *port, u8 *rxbuf, unsigned int len) { struct max310x_one *one = to_max310x_port(port); - struct spi_transfer xfer[] = { - { - .tx_buf = &one->rd_header, - .len = sizeof(one->rd_header), - }, { - .rx_buf = rxbuf, - .len = len, - } - }; - spi_sync_transfer(to_spi_device(port->dev), xfer, ARRAY_SIZE(xfer)); + + regmap_raw_read(one->regmap, MAX310X_RHR_REG, rxbuf, len); } static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) @@ -1026,7 +1036,7 @@ static void max310x_rs_proc(struct work_struct *ws) MAX310X_MODE2_ECHOSUPR_BIT, mode2); } -static int max310x_rs485_config(struct uart_port *port, +static int max310x_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct max310x_one *one = to_max310x_port(port); @@ -1035,8 +1045,6 @@ static int max310x_rs485_config(struct uart_port *port, (rs485->delay_rts_after_send > 0x0f)) return -ERANGE; - rs485->flags &= SER_RS485_RTS_ON_SEND | SER_RS485_RX_DURING_TX | - SER_RS485_ENABLED; port->rs485 = *rs485; schedule_work(&one->rs_work); @@ -1249,16 +1257,24 @@ static int max310x_gpio_set_config(struct gpio_chip *chip, unsigned int offset, } #endif +static const struct serial_rs485 max310x_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + static int max310x_probe(struct device *dev, const struct max310x_devtype *devtype, - struct regmap *regmap, int irq) + const struct max310x_if_cfg *if_cfg, + struct regmap *regmaps[], int irq) { int i, ret, fmin, fmax, freq; struct max310x_port *s; u32 uartclk = 0; bool xtal; - if (IS_ERR(regmap)) - return PTR_ERR(regmap); + for (i = 0; i < devtype->nr; i++) + if (IS_ERR(regmaps[i])) + return PTR_ERR(regmaps[i]); /* Alloc port structure */ s = devm_kzalloc(dev, struct_size(s, p, devtype->nr), GFP_KERNEL); @@ -1305,8 +1321,9 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty goto out_clk; } - s->regmap = regmap; + s->regmap = regmaps[0]; s->devtype = devtype; + s->if_cfg = if_cfg; dev_set_drvdata(dev, s); /* Check device to ensure we are talking to what we expect */ @@ -1315,22 +1332,18 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty goto out_clk; for (i = 0; i < devtype->nr; i++) { - unsigned int offs = i << 5; - /* Reset port */ - regmap_write(s->regmap, MAX310X_MODE2_REG + offs, + regmap_write(regmaps[i], MAX310X_MODE2_REG, MAX310X_MODE2_RST_BIT); /* Clear port reset */ - regmap_write(s->regmap, MAX310X_MODE2_REG + offs, 0); + regmap_write(regmaps[i], MAX310X_MODE2_REG, 0); /* Wait for port startup */ do { - regmap_read(s->regmap, - MAX310X_BRGDIVLSB_REG + offs, &ret); + regmap_read(regmaps[i], MAX310X_BRGDIVLSB_REG, &ret); } while (ret != 0x01); - regmap_write(s->regmap, MAX310X_MODE1_REG + offs, - devtype->mode1); + regmap_write(regmaps[i], MAX310X_MODE1_REG, devtype->mode1); } uartclk = max310x_set_ref_clk(dev, s, freq, xtal); @@ -1353,11 +1366,14 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty s->p[i].port.fifosize = MAX310X_FIFO_SIZE; s->p[i].port.flags = UPF_FIXED_TYPE | UPF_LOW_LATENCY; s->p[i].port.iotype = UPIO_PORT; - s->p[i].port.iobase = i * 0x20; + s->p[i].port.iobase = i; s->p[i].port.membase = (void __iomem *)~0; s->p[i].port.uartclk = uartclk; s->p[i].port.rs485_config = max310x_rs485_config; + s->p[i].port.rs485_supported = max310x_rs485_supported; s->p[i].port.ops = &max310x_ops; + s->p[i].regmap = regmaps[i]; + /* Disable all interrupts */ max310x_port_write(&s->p[i].port, MAX310X_IRQEN_REG, 0); /* Clear IRQ status register */ @@ -1368,10 +1384,6 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty INIT_WORK(&s->p[i].md_work, max310x_md_proc); /* Initialize queue for changing RS485 mode */ INIT_WORK(&s->p[i].rs_work, max310x_rs_proc); - /* Initialize SPI-transfer buffers */ - s->p[i].wr_header = (s->p[i].port.iobase + MAX310X_THR_REG) | - MAX310X_WRITE_BIT; - s->p[i].rd_header = (s->p[i].port.iobase + MAX310X_RHR_REG); /* Register port */ ret = uart_add_one_port(&max310x_uart, &s->p[i].port); @@ -1456,16 +1468,31 @@ static struct regmap_config regcfg = { .val_bits = 8, .write_flag_mask = MAX310X_WRITE_BIT, .cache_type = REGCACHE_RBTREE, + .max_register = MAX310X_REG_1F, .writeable_reg = max310x_reg_writeable, .volatile_reg = max310x_reg_volatile, .precious_reg = max310x_reg_precious, }; #ifdef CONFIG_SPI_MASTER +static int max310x_spi_extended_reg_enable(struct device *dev, bool enable) +{ + struct max310x_port *s = dev_get_drvdata(dev); + + return regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, + enable ? MAX310X_EXTREG_ENBL : MAX310X_EXTREG_DSBL); +} + +static const struct max310x_if_cfg __maybe_unused max310x_spi_if_cfg = { + .extended_reg_enable = max310x_spi_extended_reg_enable, + .rev_id_reg = MAX310X_SPI_REVID_EXTREG, +}; + static int max310x_spi_probe(struct spi_device *spi) { const struct max310x_devtype *devtype; - struct regmap *regmap; + struct regmap *regmaps[4]; + unsigned int i; int ret; /* Setup SPI bus */ @@ -1480,10 +1507,14 @@ static int max310x_spi_probe(struct spi_device *spi) if (!devtype) devtype = (struct max310x_devtype *)spi_get_device_id(spi)->driver_data; - regcfg.max_register = devtype->nr * 0x20 - 1; - regmap = devm_regmap_init_spi(spi, ®cfg); + for (i = 0; i < devtype->nr; i++) { + u8 port_mask = i * 0x20; + regcfg.read_flag_mask = port_mask; + regcfg.write_flag_mask = port_mask | MAX310X_WRITE_BIT; + regmaps[i] = devm_regmap_init_spi(spi, ®cfg); + } - return max310x_probe(&spi->dev, devtype, regmap, spi->irq); + return max310x_probe(&spi->dev, devtype, &max310x_spi_if_cfg, regmaps, spi->irq); } static void max310x_spi_remove(struct spi_device *spi) @@ -1512,6 +1543,97 @@ static struct spi_driver max310x_spi_driver = { }; #endif +#ifdef CONFIG_I2C +static int max310x_i2c_extended_reg_enable(struct device *dev, bool enable) +{ + return 0; +} + +static struct regmap_config regcfg_i2c = { + .reg_bits = 8, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, + .writeable_reg = max310x_reg_writeable, + .volatile_reg = max310x_reg_volatile, + .precious_reg = max310x_reg_precious, + .max_register = MAX310X_I2C_REVID_EXTREG, +}; + +static const struct max310x_if_cfg max310x_i2c_if_cfg = { + .extended_reg_enable = max310x_i2c_extended_reg_enable, + .rev_id_reg = MAX310X_I2C_REVID_EXTREG, +}; + +static unsigned short max310x_i2c_slave_addr(unsigned short addr, + unsigned int nr) +{ + /* + * For MAX14830 and MAX3109, the slave address depends on what the + * A0 and A1 pins are tied to. + * See Table I2C Address Map of the datasheet. + * Based on that table, the following formulas were determined. + * UART1 - UART0 = 0x10 + * UART2 - UART1 = 0x20 + 0x10 + * UART3 - UART2 = 0x10 + */ + + addr -= nr * 0x10; + + if (nr >= 2) + addr -= 0x20; + + return addr; +} + +static int max310x_i2c_probe(struct i2c_client *client) +{ + const struct max310x_devtype *devtype = + device_get_match_data(&client->dev); + struct i2c_client *port_client; + struct regmap *regmaps[4]; + unsigned int i; + u8 port_addr; + + if (client->addr < devtype->slave_addr.min || + client->addr > devtype->slave_addr.max) + return dev_err_probe(&client->dev, -EINVAL, + "Slave addr 0x%x outside of range [0x%x, 0x%x]\n", + client->addr, devtype->slave_addr.min, + devtype->slave_addr.max); + + regmaps[0] = devm_regmap_init_i2c(client, ®cfg_i2c); + + for (i = 1; i < devtype->nr; i++) { + port_addr = max310x_i2c_slave_addr(client->addr, i); + port_client = devm_i2c_new_dummy_device(&client->dev, + client->adapter, + port_addr); + + regmaps[i] = devm_regmap_init_i2c(port_client, ®cfg_i2c); + } + + return max310x_probe(&client->dev, devtype, &max310x_i2c_if_cfg, + regmaps, client->irq); +} + +static int max310x_i2c_remove(struct i2c_client *client) +{ + max310x_remove(&client->dev); + + return 0; +} + +static struct i2c_driver max310x_i2c_driver = { + .driver = { + .name = MAX310X_NAME, + .of_match_table = max310x_dt_ids, + .pm = &max310x_pm_ops, + }, + .probe_new = max310x_i2c_probe, + .remove = max310x_i2c_remove, +}; +#endif + static int __init max310x_uart_init(void) { int ret; @@ -1525,15 +1647,35 @@ static int __init max310x_uart_init(void) #ifdef CONFIG_SPI_MASTER ret = spi_register_driver(&max310x_spi_driver); if (ret) - uart_unregister_driver(&max310x_uart); + goto err_spi_register; +#endif + +#ifdef CONFIG_I2C + ret = i2c_add_driver(&max310x_i2c_driver); + if (ret) + goto err_i2c_register; +#endif + + return 0; + +#ifdef CONFIG_I2C +err_i2c_register: + spi_unregister_driver(&max310x_spi_driver); #endif +err_spi_register: + uart_unregister_driver(&max310x_uart); + return ret; } module_init(max310x_uart_init); static void __exit max310x_uart_exit(void) { +#ifdef CONFIG_I2C + i2c_del_driver(&max310x_i2c_driver); +#endif + #ifdef CONFIG_SPI_MASTER spi_unregister_driver(&max310x_spi_driver); #endif diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c index 2aec62b5d6c4..f4aaaadd0742 100644 --- a/drivers/tty/serial/mcf.c +++ b/drivers/tty/serial/mcf.c @@ -431,7 +431,8 @@ static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser) /****************************************************************************/ /* Enable or disable the RS485 support */ -static int mcf_config_rs485(struct uart_port *port, struct serial_rs485 *rs485) +static int mcf_config_rs485(struct uart_port *port, struct ktermios *termios, + struct serial_rs485 *rs485) { unsigned char mr1, mr2; @@ -448,11 +449,14 @@ static int mcf_config_rs485(struct uart_port *port, struct serial_rs485 *rs485) } writeb(mr1, port->membase + MCFUART_UMR); writeb(mr2, port->membase + MCFUART_UMR); - port->rs485 = *rs485; return 0; } +static const struct serial_rs485 mcf_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_AFTER_SEND, +}; + /****************************************************************************/ /* @@ -502,6 +506,7 @@ int __init early_mcf_setup(struct mcf_platform_uart *platp) port->uartclk = MCF_BUSCLK; port->flags = UPF_BOOT_AUTOCONF; port->rs485_config = mcf_config_rs485; + port->rs485_supported = mcf_rs485_supported; port->ops = &mcf_uart_ops; } @@ -629,6 +634,7 @@ static int mcf_probe(struct platform_device *pdev) port->ops = &mcf_uart_ops; port->flags = UPF_BOOT_AUTOCONF; port->rs485_config = mcf_config_rs485; + port->rs485_supported = mcf_rs485_supported; port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MCF_CONSOLE); uart_add_one_port(&mcf_driver, port); diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index 4869c0059c98..6c8db19fd572 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -162,7 +162,7 @@ static void meson_uart_start_tx(struct uart_port *port) ch = xmit->buf[xmit->tail]; writel(ch, port->membase + AML_UART_WFIFO); - xmit->tail = (xmit->tail+1) & (SERIAL_XMIT_SIZE - 1); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); port->icount.tx++; } diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index e676ec761f18..3159889ddae1 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -29,103 +29,103 @@ #include <linux/of_device.h> #include <linux/wait.h> -#define UART_MR1 0x0000 - -#define UART_MR1_AUTO_RFR_LEVEL0 0x3F -#define UART_MR1_AUTO_RFR_LEVEL1 0x3FF00 -#define UART_DM_MR1_AUTO_RFR_LEVEL1 0xFFFFFF00 -#define UART_MR1_RX_RDY_CTL BIT(7) -#define UART_MR1_CTS_CTL BIT(6) - -#define UART_MR2 0x0004 -#define UART_MR2_ERROR_MODE BIT(6) -#define UART_MR2_BITS_PER_CHAR 0x30 -#define UART_MR2_BITS_PER_CHAR_5 (0x0 << 4) -#define UART_MR2_BITS_PER_CHAR_6 (0x1 << 4) -#define UART_MR2_BITS_PER_CHAR_7 (0x2 << 4) -#define UART_MR2_BITS_PER_CHAR_8 (0x3 << 4) -#define UART_MR2_STOP_BIT_LEN_ONE (0x1 << 2) -#define UART_MR2_STOP_BIT_LEN_TWO (0x3 << 2) -#define UART_MR2_PARITY_MODE_NONE 0x0 -#define UART_MR2_PARITY_MODE_ODD 0x1 -#define UART_MR2_PARITY_MODE_EVEN 0x2 -#define UART_MR2_PARITY_MODE_SPACE 0x3 -#define UART_MR2_PARITY_MODE 0x3 - -#define UART_CSR 0x0008 - -#define UART_TF 0x000C +#define MSM_UART_MR1 0x0000 + +#define MSM_UART_MR1_AUTO_RFR_LEVEL0 0x3F +#define MSM_UART_MR1_AUTO_RFR_LEVEL1 0x3FF00 +#define MSM_UART_DM_MR1_AUTO_RFR_LEVEL1 0xFFFFFF00 +#define MSM_UART_MR1_RX_RDY_CTL BIT(7) +#define MSM_UART_MR1_CTS_CTL BIT(6) + +#define MSM_UART_MR2 0x0004 +#define MSM_UART_MR2_ERROR_MODE BIT(6) +#define MSM_UART_MR2_BITS_PER_CHAR 0x30 +#define MSM_UART_MR2_BITS_PER_CHAR_5 (0x0 << 4) +#define MSM_UART_MR2_BITS_PER_CHAR_6 (0x1 << 4) +#define MSM_UART_MR2_BITS_PER_CHAR_7 (0x2 << 4) +#define MSM_UART_MR2_BITS_PER_CHAR_8 (0x3 << 4) +#define MSM_UART_MR2_STOP_BIT_LEN_ONE (0x1 << 2) +#define MSM_UART_MR2_STOP_BIT_LEN_TWO (0x3 << 2) +#define MSM_UART_MR2_PARITY_MODE_NONE 0x0 +#define MSM_UART_MR2_PARITY_MODE_ODD 0x1 +#define MSM_UART_MR2_PARITY_MODE_EVEN 0x2 +#define MSM_UART_MR2_PARITY_MODE_SPACE 0x3 +#define MSM_UART_MR2_PARITY_MODE 0x3 + +#define MSM_UART_CSR 0x0008 + +#define MSM_UART_TF 0x000C #define UARTDM_TF 0x0070 -#define UART_CR 0x0010 -#define UART_CR_CMD_NULL (0 << 4) -#define UART_CR_CMD_RESET_RX (1 << 4) -#define UART_CR_CMD_RESET_TX (2 << 4) -#define UART_CR_CMD_RESET_ERR (3 << 4) -#define UART_CR_CMD_RESET_BREAK_INT (4 << 4) -#define UART_CR_CMD_START_BREAK (5 << 4) -#define UART_CR_CMD_STOP_BREAK (6 << 4) -#define UART_CR_CMD_RESET_CTS (7 << 4) -#define UART_CR_CMD_RESET_STALE_INT (8 << 4) -#define UART_CR_CMD_PACKET_MODE (9 << 4) -#define UART_CR_CMD_MODE_RESET (12 << 4) -#define UART_CR_CMD_SET_RFR (13 << 4) -#define UART_CR_CMD_RESET_RFR (14 << 4) -#define UART_CR_CMD_PROTECTION_EN (16 << 4) -#define UART_CR_CMD_STALE_EVENT_DISABLE (6 << 8) -#define UART_CR_CMD_STALE_EVENT_ENABLE (80 << 4) -#define UART_CR_CMD_FORCE_STALE (4 << 8) -#define UART_CR_CMD_RESET_TX_READY (3 << 8) -#define UART_CR_TX_DISABLE BIT(3) -#define UART_CR_TX_ENABLE BIT(2) -#define UART_CR_RX_DISABLE BIT(1) -#define UART_CR_RX_ENABLE BIT(0) -#define UART_CR_CMD_RESET_RXBREAK_START ((1 << 11) | (2 << 4)) - -#define UART_IMR 0x0014 -#define UART_IMR_TXLEV BIT(0) -#define UART_IMR_RXSTALE BIT(3) -#define UART_IMR_RXLEV BIT(4) -#define UART_IMR_DELTA_CTS BIT(5) -#define UART_IMR_CURRENT_CTS BIT(6) -#define UART_IMR_RXBREAK_START BIT(10) - -#define UART_IPR_RXSTALE_LAST 0x20 -#define UART_IPR_STALE_LSB 0x1F -#define UART_IPR_STALE_TIMEOUT_MSB 0x3FF80 -#define UART_DM_IPR_STALE_TIMEOUT_MSB 0xFFFFFF80 - -#define UART_IPR 0x0018 -#define UART_TFWR 0x001C -#define UART_RFWR 0x0020 -#define UART_HCR 0x0024 - -#define UART_MREG 0x0028 -#define UART_NREG 0x002C -#define UART_DREG 0x0030 -#define UART_MNDREG 0x0034 -#define UART_IRDA 0x0038 -#define UART_MISR_MODE 0x0040 -#define UART_MISR_RESET 0x0044 -#define UART_MISR_EXPORT 0x0048 -#define UART_MISR_VAL 0x004C -#define UART_TEST_CTRL 0x0050 - -#define UART_SR 0x0008 -#define UART_SR_HUNT_CHAR BIT(7) -#define UART_SR_RX_BREAK BIT(6) -#define UART_SR_PAR_FRAME_ERR BIT(5) -#define UART_SR_OVERRUN BIT(4) -#define UART_SR_TX_EMPTY BIT(3) -#define UART_SR_TX_READY BIT(2) -#define UART_SR_RX_FULL BIT(1) -#define UART_SR_RX_READY BIT(0) - -#define UART_RF 0x000C +#define MSM_UART_CR 0x0010 +#define MSM_UART_CR_CMD_NULL (0 << 4) +#define MSM_UART_CR_CMD_RESET_RX (1 << 4) +#define MSM_UART_CR_CMD_RESET_TX (2 << 4) +#define MSM_UART_CR_CMD_RESET_ERR (3 << 4) +#define MSM_UART_CR_CMD_RESET_BREAK_INT (4 << 4) +#define MSM_UART_CR_CMD_START_BREAK (5 << 4) +#define MSM_UART_CR_CMD_STOP_BREAK (6 << 4) +#define MSM_UART_CR_CMD_RESET_CTS (7 << 4) +#define MSM_UART_CR_CMD_RESET_STALE_INT (8 << 4) +#define MSM_UART_CR_CMD_PACKET_MODE (9 << 4) +#define MSM_UART_CR_CMD_MODE_RESET (12 << 4) +#define MSM_UART_CR_CMD_SET_RFR (13 << 4) +#define MSM_UART_CR_CMD_RESET_RFR (14 << 4) +#define MSM_UART_CR_CMD_PROTECTION_EN (16 << 4) +#define MSM_UART_CR_CMD_STALE_EVENT_DISABLE (6 << 8) +#define MSM_UART_CR_CMD_STALE_EVENT_ENABLE (80 << 4) +#define MSM_UART_CR_CMD_FORCE_STALE (4 << 8) +#define MSM_UART_CR_CMD_RESET_TX_READY (3 << 8) +#define MSM_UART_CR_TX_DISABLE BIT(3) +#define MSM_UART_CR_TX_ENABLE BIT(2) +#define MSM_UART_CR_RX_DISABLE BIT(1) +#define MSM_UART_CR_RX_ENABLE BIT(0) +#define MSM_UART_CR_CMD_RESET_RXBREAK_START ((1 << 11) | (2 << 4)) + +#define MSM_UART_IMR 0x0014 +#define MSM_UART_IMR_TXLEV BIT(0) +#define MSM_UART_IMR_RXSTALE BIT(3) +#define MSM_UART_IMR_RXLEV BIT(4) +#define MSM_UART_IMR_DELTA_CTS BIT(5) +#define MSM_UART_IMR_CURRENT_CTS BIT(6) +#define MSM_UART_IMR_RXBREAK_START BIT(10) + +#define MSM_UART_IPR_RXSTALE_LAST 0x20 +#define MSM_UART_IPR_STALE_LSB 0x1F +#define MSM_UART_IPR_STALE_TIMEOUT_MSB 0x3FF80 +#define MSM_UART_DM_IPR_STALE_TIMEOUT_MSB 0xFFFFFF80 + +#define MSM_UART_IPR 0x0018 +#define MSM_UART_TFWR 0x001C +#define MSM_UART_RFWR 0x0020 +#define MSM_UART_HCR 0x0024 + +#define MSM_UART_MREG 0x0028 +#define MSM_UART_NREG 0x002C +#define MSM_UART_DREG 0x0030 +#define MSM_UART_MNDREG 0x0034 +#define MSM_UART_IRDA 0x0038 +#define MSM_UART_MISR_MODE 0x0040 +#define MSM_UART_MISR_RESET 0x0044 +#define MSM_UART_MISR_EXPORT 0x0048 +#define MSM_UART_MISR_VAL 0x004C +#define MSM_UART_TEST_CTRL 0x0050 + +#define MSM_UART_SR 0x0008 +#define MSM_UART_SR_HUNT_CHAR BIT(7) +#define MSM_UART_SR_RX_BREAK BIT(6) +#define MSM_UART_SR_PAR_FRAME_ERR BIT(5) +#define MSM_UART_SR_OVERRUN BIT(4) +#define MSM_UART_SR_TX_EMPTY BIT(3) +#define MSM_UART_SR_TX_READY BIT(2) +#define MSM_UART_SR_RX_FULL BIT(1) +#define MSM_UART_SR_RX_READY BIT(0) + +#define MSM_UART_RF 0x000C #define UARTDM_RF 0x0070 -#define UART_MISR 0x0010 -#define UART_ISR 0x0014 -#define UART_ISR_TX_READY BIT(7) +#define MSM_UART_MISR 0x0010 +#define MSM_UART_ISR 0x0014 +#define MSM_UART_ISR_TX_READY BIT(7) #define UARTDM_RXFS 0x50 #define UARTDM_RXFS_BUF_SHIFT 0x7 @@ -181,7 +181,10 @@ struct msm_port { struct msm_dma rx_dma; }; -#define UART_TO_MSM(uart_port) container_of(uart_port, struct msm_port, uart) +static inline struct msm_port *to_msm_port(struct uart_port *up) +{ + return container_of(up, struct msm_port, uart); +} static void msm_write(struct uart_port *port, unsigned int val, unsigned int off) @@ -200,10 +203,10 @@ unsigned int msm_read(struct uart_port *port, unsigned int off) */ static void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) { - msm_write(port, 0x06, UART_MREG); - msm_write(port, 0xF1, UART_NREG); - msm_write(port, 0x0F, UART_DREG); - msm_write(port, 0x1A, UART_MNDREG); + msm_write(port, 0x06, MSM_UART_MREG); + msm_write(port, 0xF1, MSM_UART_NREG); + msm_write(port, 0x0F, MSM_UART_DREG); + msm_write(port, 0x1A, MSM_UART_MNDREG); port->uartclk = 1843200; } @@ -212,16 +215,16 @@ static void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) */ static void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port) { - msm_write(port, 0x18, UART_MREG); - msm_write(port, 0xF6, UART_NREG); - msm_write(port, 0x0F, UART_DREG); - msm_write(port, 0x0A, UART_MNDREG); + msm_write(port, 0x18, MSM_UART_MREG); + msm_write(port, 0xF6, MSM_UART_NREG); + msm_write(port, 0x0F, MSM_UART_DREG); + msm_write(port, 0x0A, MSM_UART_MNDREG); port->uartclk = 1843200; } static void msm_serial_set_mnd_regs(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); /* * These registers don't exist so we change the clk input rate @@ -392,35 +395,35 @@ static inline void msm_wait_for_xmitr(struct uart_port *port) { unsigned int timeout = 500000; - while (!(msm_read(port, UART_SR) & UART_SR_TX_EMPTY)) { - if (msm_read(port, UART_ISR) & UART_ISR_TX_READY) + while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_EMPTY)) { + if (msm_read(port, MSM_UART_ISR) & MSM_UART_ISR_TX_READY) break; udelay(1); if (!timeout--) break; } - msm_write(port, UART_CR_CMD_RESET_TX_READY, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_TX_READY, MSM_UART_CR); } static void msm_stop_tx(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); - msm_port->imr &= ~UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); + msm_port->imr &= ~MSM_UART_IMR_TXLEV; + msm_write(port, msm_port->imr, MSM_UART_IMR); } static void msm_start_tx(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); struct msm_dma *dma = &msm_port->tx_dma; /* Already started in DMA mode */ if (dma->count) return; - msm_port->imr |= UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); + msm_port->imr |= MSM_UART_IMR_TXLEV; + msm_write(port, msm_port->imr, MSM_UART_IMR); } static void msm_reset_dm_count(struct uart_port *port, int count) @@ -456,8 +459,8 @@ static void msm_complete_tx_dma(void *args) msm_write(port, val, UARTDM_DMEN); if (msm_port->is_uartdm > UARTDM_1P3) { - msm_write(port, UART_CR_CMD_RESET_TX, UART_CR); - msm_write(port, UART_CR_TX_ENABLE, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_TX, MSM_UART_CR); + msm_write(port, MSM_UART_CR_TX_ENABLE, MSM_UART_CR); } count = dma->count - state.residue; @@ -468,8 +471,8 @@ static void msm_complete_tx_dma(void *args) xmit->tail &= UART_XMIT_SIZE - 1; /* Restore "Tx FIFO below watermark" interrupt */ - msm_port->imr |= UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); + msm_port->imr |= MSM_UART_IMR_TXLEV; + msm_write(port, msm_port->imr, MSM_UART_IMR); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); @@ -516,8 +519,8 @@ static int msm_handle_tx_dma(struct msm_port *msm_port, unsigned int count) * Using DMA complete for Tx FIFO reload, no need for * "Tx FIFO below watermark" one, disable it */ - msm_port->imr &= ~UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); + msm_port->imr &= ~MSM_UART_IMR_TXLEV; + msm_write(port, msm_port->imr, MSM_UART_IMR); dma->count = count; @@ -559,10 +562,10 @@ static void msm_complete_rx_dma(void *args) val &= ~dma->enable_bit; msm_write(port, val, UARTDM_DMEN); - if (msm_read(port, UART_SR) & UART_SR_OVERRUN) { + if (msm_read(port, MSM_UART_SR) & MSM_UART_SR_OVERRUN) { port->icount.overrun++; tty_insert_flip_char(tport, 0, TTY_OVERRUN); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_ERR, MSM_UART_CR); } count = msm_read(port, UARTDM_RX_TOTAL_SNAP); @@ -584,7 +587,7 @@ static void msm_complete_rx_dma(void *args) continue; } - if (!(port->read_status_mask & UART_SR_RX_BREAK)) + if (!(port->read_status_mask & MSM_UART_SR_RX_BREAK)) flag = TTY_NORMAL; spin_unlock_irqrestore(&port->lock, flags); @@ -638,23 +641,23 @@ static void msm_start_rx_dma(struct msm_port *msm_port) * Using DMA for FIFO off-load, no need for "Rx FIFO over * watermark" or "stale" interrupts, disable them */ - msm_port->imr &= ~(UART_IMR_RXLEV | UART_IMR_RXSTALE); + msm_port->imr &= ~(MSM_UART_IMR_RXLEV | MSM_UART_IMR_RXSTALE); /* * Well, when DMA is ADM3 engine(implied by <= UARTDM v1.3), * we need RXSTALE to flush input DMA fifo to memory */ if (msm_port->is_uartdm < UARTDM_1P4) - msm_port->imr |= UART_IMR_RXSTALE; + msm_port->imr |= MSM_UART_IMR_RXSTALE; - msm_write(uart, msm_port->imr, UART_IMR); + msm_write(uart, msm_port->imr, MSM_UART_IMR); dma->count = UARTDM_RX_SIZE; dma_async_issue_pending(dma->chan); - msm_write(uart, UART_CR_CMD_RESET_STALE_INT, UART_CR); - msm_write(uart, UART_CR_CMD_STALE_EVENT_ENABLE, UART_CR); + msm_write(uart, MSM_UART_CR_CMD_RESET_STALE_INT, MSM_UART_CR); + msm_write(uart, MSM_UART_CR_CMD_STALE_EVENT_ENABLE, MSM_UART_CR); val = msm_read(uart, UARTDM_DMEN); val |= dma->enable_bit; @@ -676,25 +679,25 @@ sw_mode: * Switch from DMA to SW/FIFO mode. After clearing Rx BAM (UARTDM_DMEN), * receiver must be reset. */ - msm_write(uart, UART_CR_CMD_RESET_RX, UART_CR); - msm_write(uart, UART_CR_RX_ENABLE, UART_CR); + msm_write(uart, MSM_UART_CR_CMD_RESET_RX, MSM_UART_CR); + msm_write(uart, MSM_UART_CR_RX_ENABLE, MSM_UART_CR); - msm_write(uart, UART_CR_CMD_RESET_STALE_INT, UART_CR); + msm_write(uart, MSM_UART_CR_CMD_RESET_STALE_INT, MSM_UART_CR); msm_write(uart, 0xFFFFFF, UARTDM_DMRX); - msm_write(uart, UART_CR_CMD_STALE_EVENT_ENABLE, UART_CR); + msm_write(uart, MSM_UART_CR_CMD_STALE_EVENT_ENABLE, MSM_UART_CR); /* Re-enable RX interrupts */ - msm_port->imr |= (UART_IMR_RXLEV | UART_IMR_RXSTALE); - msm_write(uart, msm_port->imr, UART_IMR); + msm_port->imr |= MSM_UART_IMR_RXLEV | MSM_UART_IMR_RXSTALE; + msm_write(uart, msm_port->imr, MSM_UART_IMR); } static void msm_stop_rx(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); struct msm_dma *dma = &msm_port->rx_dma; - msm_port->imr &= ~(UART_IMR_RXLEV | UART_IMR_RXSTALE); - msm_write(port, msm_port->imr, UART_IMR); + msm_port->imr &= ~(MSM_UART_IMR_RXLEV | MSM_UART_IMR_RXSTALE); + msm_write(port, msm_port->imr, MSM_UART_IMR); if (dma->chan) msm_stop_dma(port, dma); @@ -702,10 +705,10 @@ static void msm_stop_rx(struct uart_port *port) static void msm_enable_ms(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); - msm_port->imr |= UART_IMR_DELTA_CTS; - msm_write(port, msm_port->imr, UART_IMR); + msm_port->imr |= MSM_UART_IMR_DELTA_CTS; + msm_write(port, msm_port->imr, MSM_UART_IMR); } static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr) @@ -714,20 +717,20 @@ static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr) struct tty_port *tport = &port->state->port; unsigned int sr; int count = 0; - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); - if ((msm_read(port, UART_SR) & UART_SR_OVERRUN)) { + if ((msm_read(port, MSM_UART_SR) & MSM_UART_SR_OVERRUN)) { port->icount.overrun++; tty_insert_flip_char(tport, 0, TTY_OVERRUN); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_ERR, MSM_UART_CR); } - if (misr & UART_IMR_RXSTALE) { + if (misr & MSM_UART_IMR_RXSTALE) { count = msm_read(port, UARTDM_RX_TOTAL_SNAP) - msm_port->old_snap_state; msm_port->old_snap_state = 0; } else { - count = 4 * (msm_read(port, UART_RFWR)); + count = 4 * (msm_read(port, MSM_UART_RFWR)); msm_port->old_snap_state += count; } @@ -739,8 +742,8 @@ static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr) unsigned char buf[4]; int sysrq, r_count, i; - sr = msm_read(port, UART_SR); - if ((sr & UART_SR_RX_READY) == 0) { + sr = msm_read(port, MSM_UART_SR); + if ((sr & MSM_UART_SR_RX_READY) == 0) { msm_port->old_snap_state -= count; break; } @@ -759,7 +762,7 @@ static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr) continue; } - if (!(port->read_status_mask & UART_SR_RX_BREAK)) + if (!(port->read_status_mask & MSM_UART_SR_RX_BREAK)) flag = TTY_NORMAL; spin_unlock(&port->lock); @@ -773,10 +776,10 @@ static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr) tty_flip_buffer_push(tport); - if (misr & (UART_IMR_RXSTALE)) - msm_write(port, UART_CR_CMD_RESET_STALE_INT, UART_CR); + if (misr & (MSM_UART_IMR_RXSTALE)) + msm_write(port, MSM_UART_CR_CMD_RESET_STALE_INT, MSM_UART_CR); msm_write(port, 0xFFFFFF, UARTDM_DMRX); - msm_write(port, UART_CR_CMD_STALE_EVENT_ENABLE, UART_CR); + msm_write(port, MSM_UART_CR_CMD_STALE_EVENT_ENABLE, MSM_UART_CR); /* Try to use DMA */ msm_start_rx_dma(msm_port); @@ -792,25 +795,25 @@ static void msm_handle_rx(struct uart_port *port) * Handle overrun. My understanding of the hardware is that overrun * is not tied to the RX buffer, so we handle the case out of band. */ - if ((msm_read(port, UART_SR) & UART_SR_OVERRUN)) { + if ((msm_read(port, MSM_UART_SR) & MSM_UART_SR_OVERRUN)) { port->icount.overrun++; tty_insert_flip_char(tport, 0, TTY_OVERRUN); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_ERR, MSM_UART_CR); } /* and now the main RX loop */ - while ((sr = msm_read(port, UART_SR)) & UART_SR_RX_READY) { + while ((sr = msm_read(port, MSM_UART_SR)) & MSM_UART_SR_RX_READY) { unsigned int c; char flag = TTY_NORMAL; int sysrq; - c = msm_read(port, UART_RF); + c = msm_read(port, MSM_UART_RF); - if (sr & UART_SR_RX_BREAK) { + if (sr & MSM_UART_SR_RX_BREAK) { port->icount.brk++; if (uart_handle_break(port)) continue; - } else if (sr & UART_SR_PAR_FRAME_ERR) { + } else if (sr & MSM_UART_SR_PAR_FRAME_ERR) { port->icount.frame++; } else { port->icount.rx++; @@ -819,9 +822,9 @@ static void msm_handle_rx(struct uart_port *port) /* Mask conditions we're ignorning. */ sr &= port->read_status_mask; - if (sr & UART_SR_RX_BREAK) + if (sr & MSM_UART_SR_RX_BREAK) flag = TTY_BREAK; - else if (sr & UART_SR_PAR_FRAME_ERR) + else if (sr & MSM_UART_SR_PAR_FRAME_ERR) flag = TTY_FRAME; spin_unlock(&port->lock); @@ -837,7 +840,7 @@ static void msm_handle_rx(struct uart_port *port) static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count) { struct circ_buf *xmit = &port->state->xmit; - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); unsigned int num_chars; unsigned int tf_pointer = 0; void __iomem *tf; @@ -845,7 +848,7 @@ static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count) if (msm_port->is_uartdm) tf = port->membase + UARTDM_TF; else - tf = port->membase + UART_TF; + tf = port->membase + MSM_UART_TF; if (tx_count && msm_port->is_uartdm) msm_reset_dm_count(port, tx_count); @@ -854,7 +857,7 @@ static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count) int i; char buf[4] = { 0 }; - if (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) + if (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY)) break; if (msm_port->is_uartdm) @@ -883,7 +886,7 @@ static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count) static void msm_handle_tx(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); struct circ_buf *xmit = &msm_port->uart.state->xmit; struct msm_dma *dma = &msm_port->tx_dma; unsigned int pio_count, dma_count, dma_min; @@ -895,7 +898,7 @@ static void msm_handle_tx(struct uart_port *port) if (msm_port->is_uartdm) tf = port->membase + UARTDM_TF; else - tf = port->membase + UART_TF; + tf = port->membase + MSM_UART_TF; buf[0] = port->x_char; @@ -939,7 +942,7 @@ static void msm_handle_tx(struct uart_port *port) static void msm_handle_delta_cts(struct uart_port *port) { - msm_write(port, UART_CR_CMD_RESET_CTS, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_CTS, MSM_UART_CR); port->icount.cts++; wake_up_interruptible(&port->state->port.delta_msr_wait); } @@ -947,27 +950,27 @@ static void msm_handle_delta_cts(struct uart_port *port) static irqreturn_t msm_uart_irq(int irq, void *dev_id) { struct uart_port *port = dev_id; - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); struct msm_dma *dma = &msm_port->rx_dma; unsigned long flags; unsigned int misr; u32 val; spin_lock_irqsave(&port->lock, flags); - misr = msm_read(port, UART_MISR); - msm_write(port, 0, UART_IMR); /* disable interrupt */ + misr = msm_read(port, MSM_UART_MISR); + msm_write(port, 0, MSM_UART_IMR); /* disable interrupt */ - if (misr & UART_IMR_RXBREAK_START) { + if (misr & MSM_UART_IMR_RXBREAK_START) { msm_port->break_detected = true; - msm_write(port, UART_CR_CMD_RESET_RXBREAK_START, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_RXBREAK_START, MSM_UART_CR); } - if (misr & (UART_IMR_RXLEV | UART_IMR_RXSTALE)) { + if (misr & (MSM_UART_IMR_RXLEV | MSM_UART_IMR_RXSTALE)) { if (dma->count) { - val = UART_CR_CMD_STALE_EVENT_DISABLE; - msm_write(port, val, UART_CR); - val = UART_CR_CMD_RESET_STALE_INT; - msm_write(port, val, UART_CR); + val = MSM_UART_CR_CMD_STALE_EVENT_DISABLE; + msm_write(port, val, MSM_UART_CR); + val = MSM_UART_CR_CMD_RESET_STALE_INT; + msm_write(port, val, MSM_UART_CR); /* * Flush DMA input fifo to memory, this will also * trigger DMA RX completion @@ -979,12 +982,12 @@ static irqreturn_t msm_uart_irq(int irq, void *dev_id) msm_handle_rx(port); } } - if (misr & UART_IMR_TXLEV) + if (misr & MSM_UART_IMR_TXLEV) msm_handle_tx(port); - if (misr & UART_IMR_DELTA_CTS) + if (misr & MSM_UART_IMR_DELTA_CTS) msm_handle_delta_cts(port); - msm_write(port, msm_port->imr, UART_IMR); /* restore interrupt */ + msm_write(port, msm_port->imr, MSM_UART_IMR); /* restore interrupt */ spin_unlock_irqrestore(&port->lock, flags); return IRQ_HANDLED; @@ -992,7 +995,7 @@ static irqreturn_t msm_uart_irq(int irq, void *dev_id) static unsigned int msm_tx_empty(struct uart_port *port) { - return (msm_read(port, UART_SR) & UART_SR_TX_EMPTY) ? TIOCSER_TEMT : 0; + return (msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_EMPTY) ? TIOCSER_TEMT : 0; } static unsigned int msm_get_mctrl(struct uart_port *port) @@ -1002,19 +1005,19 @@ static unsigned int msm_get_mctrl(struct uart_port *port) static void msm_reset(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); unsigned int mr; /* reset everything */ - msm_write(port, UART_CR_CMD_RESET_RX, UART_CR); - msm_write(port, UART_CR_CMD_RESET_TX, UART_CR); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); - msm_write(port, UART_CR_CMD_RESET_BREAK_INT, UART_CR); - msm_write(port, UART_CR_CMD_RESET_CTS, UART_CR); - msm_write(port, UART_CR_CMD_RESET_RFR, UART_CR); - mr = msm_read(port, UART_MR1); - mr &= ~UART_MR1_RX_RDY_CTL; - msm_write(port, mr, UART_MR1); + msm_write(port, MSM_UART_CR_CMD_RESET_RX, MSM_UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_TX, MSM_UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_ERR, MSM_UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_BREAK_INT, MSM_UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_CTS, MSM_UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_RFR, MSM_UART_CR); + mr = msm_read(port, MSM_UART_MR1); + mr &= ~MSM_UART_MR1_RX_RDY_CTL; + msm_write(port, mr, MSM_UART_MR1); /* Disable DM modes */ if (msm_port->is_uartdm) @@ -1025,24 +1028,24 @@ static void msm_set_mctrl(struct uart_port *port, unsigned int mctrl) { unsigned int mr; - mr = msm_read(port, UART_MR1); + mr = msm_read(port, MSM_UART_MR1); if (!(mctrl & TIOCM_RTS)) { - mr &= ~UART_MR1_RX_RDY_CTL; - msm_write(port, mr, UART_MR1); - msm_write(port, UART_CR_CMD_RESET_RFR, UART_CR); + mr &= ~MSM_UART_MR1_RX_RDY_CTL; + msm_write(port, mr, MSM_UART_MR1); + msm_write(port, MSM_UART_CR_CMD_RESET_RFR, MSM_UART_CR); } else { - mr |= UART_MR1_RX_RDY_CTL; - msm_write(port, mr, UART_MR1); + mr |= MSM_UART_MR1_RX_RDY_CTL; + msm_write(port, mr, MSM_UART_MR1); } } static void msm_break_ctl(struct uart_port *port, int break_ctl) { if (break_ctl) - msm_write(port, UART_CR_CMD_START_BREAK, UART_CR); + msm_write(port, MSM_UART_CR_CMD_START_BREAK, MSM_UART_CR); else - msm_write(port, UART_CR_CMD_STOP_BREAK, UART_CR); + msm_write(port, MSM_UART_CR_CMD_STOP_BREAK, MSM_UART_CR); } struct msm_baud_map { @@ -1055,7 +1058,7 @@ static const struct msm_baud_map * msm_find_best_baud(struct uart_port *port, unsigned int baud, unsigned long *rate) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); unsigned int divisor, result; unsigned long target, old, best_rate = 0, diff, best_diff = ULONG_MAX; const struct msm_baud_map *entry, *end, *best; @@ -1124,7 +1127,7 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, unsigned long *saved_flags) { unsigned int rxstale, watermark, mask; - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); const struct msm_baud_map *entry; unsigned long flags, rate; @@ -1139,45 +1142,45 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, *saved_flags = flags; port->uartclk = rate; - msm_write(port, entry->code, UART_CSR); + msm_write(port, entry->code, MSM_UART_CSR); /* RX stale watermark */ rxstale = entry->rxstale; - watermark = UART_IPR_STALE_LSB & rxstale; + watermark = MSM_UART_IPR_STALE_LSB & rxstale; if (msm_port->is_uartdm) { - mask = UART_DM_IPR_STALE_TIMEOUT_MSB; + mask = MSM_UART_DM_IPR_STALE_TIMEOUT_MSB; } else { - watermark |= UART_IPR_RXSTALE_LAST; - mask = UART_IPR_STALE_TIMEOUT_MSB; + watermark |= MSM_UART_IPR_RXSTALE_LAST; + mask = MSM_UART_IPR_STALE_TIMEOUT_MSB; } watermark |= mask & (rxstale << 2); - msm_write(port, watermark, UART_IPR); + msm_write(port, watermark, MSM_UART_IPR); /* set RX watermark */ watermark = (port->fifosize * 3) / 4; - msm_write(port, watermark, UART_RFWR); + msm_write(port, watermark, MSM_UART_RFWR); /* set TX watermark */ - msm_write(port, 10, UART_TFWR); + msm_write(port, 10, MSM_UART_TFWR); - msm_write(port, UART_CR_CMD_PROTECTION_EN, UART_CR); + msm_write(port, MSM_UART_CR_CMD_PROTECTION_EN, MSM_UART_CR); msm_reset(port); /* Enable RX and TX */ - msm_write(port, UART_CR_TX_ENABLE | UART_CR_RX_ENABLE, UART_CR); + msm_write(port, MSM_UART_CR_TX_ENABLE | MSM_UART_CR_RX_ENABLE, MSM_UART_CR); /* turn on RX and CTS interrupts */ - msm_port->imr = UART_IMR_RXLEV | UART_IMR_RXSTALE | - UART_IMR_CURRENT_CTS | UART_IMR_RXBREAK_START; + msm_port->imr = MSM_UART_IMR_RXLEV | MSM_UART_IMR_RXSTALE | + MSM_UART_IMR_CURRENT_CTS | MSM_UART_IMR_RXBREAK_START; - msm_write(port, msm_port->imr, UART_IMR); + msm_write(port, msm_port->imr, MSM_UART_IMR); if (msm_port->is_uartdm) { - msm_write(port, UART_CR_CMD_RESET_STALE_INT, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_STALE_INT, MSM_UART_CR); msm_write(port, 0xFFFFFF, UARTDM_DMRX); - msm_write(port, UART_CR_CMD_STALE_EVENT_ENABLE, UART_CR); + msm_write(port, MSM_UART_CR_CMD_STALE_EVENT_ENABLE, MSM_UART_CR); } return baud; @@ -1185,7 +1188,7 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, static void msm_init_clock(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); clk_prepare_enable(msm_port->clk); clk_prepare_enable(msm_port->pclk); @@ -1194,7 +1197,7 @@ static void msm_init_clock(struct uart_port *port) static int msm_startup(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); unsigned int data, rfr_level, mask; int ret; @@ -1209,18 +1212,18 @@ static int msm_startup(struct uart_port *port) rfr_level = port->fifosize; /* set automatic RFR level */ - data = msm_read(port, UART_MR1); + data = msm_read(port, MSM_UART_MR1); if (msm_port->is_uartdm) - mask = UART_DM_MR1_AUTO_RFR_LEVEL1; + mask = MSM_UART_DM_MR1_AUTO_RFR_LEVEL1; else - mask = UART_MR1_AUTO_RFR_LEVEL1; + mask = MSM_UART_MR1_AUTO_RFR_LEVEL1; data &= ~mask; - data &= ~UART_MR1_AUTO_RFR_LEVEL0; + data &= ~MSM_UART_MR1_AUTO_RFR_LEVEL0; data |= mask & (rfr_level << 2); - data |= UART_MR1_AUTO_RFR_LEVEL0 & rfr_level; - msm_write(port, data, UART_MR1); + data |= MSM_UART_MR1_AUTO_RFR_LEVEL0 & rfr_level; + msm_write(port, data, MSM_UART_MR1); if (msm_port->is_uartdm) { msm_request_tx_dma(msm_port, msm_port->uart.mapbase); @@ -1246,10 +1249,10 @@ err_irq: static void msm_shutdown(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); msm_port->imr = 0; - msm_write(port, 0, UART_IMR); /* disable interrupts */ + msm_write(port, 0, MSM_UART_IMR); /* disable interrupts */ if (msm_port->is_uartdm) msm_release_dma(msm_port); @@ -1262,7 +1265,7 @@ static void msm_shutdown(struct uart_port *port) static void msm_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); struct msm_dma *dma = &msm_port->rx_dma; unsigned long flags; unsigned int baud, mr; @@ -1279,60 +1282,60 @@ static void msm_set_termios(struct uart_port *port, struct ktermios *termios, tty_termios_encode_baud_rate(termios, baud, baud); /* calculate parity */ - mr = msm_read(port, UART_MR2); - mr &= ~UART_MR2_PARITY_MODE; + mr = msm_read(port, MSM_UART_MR2); + mr &= ~MSM_UART_MR2_PARITY_MODE; if (termios->c_cflag & PARENB) { if (termios->c_cflag & PARODD) - mr |= UART_MR2_PARITY_MODE_ODD; + mr |= MSM_UART_MR2_PARITY_MODE_ODD; else if (termios->c_cflag & CMSPAR) - mr |= UART_MR2_PARITY_MODE_SPACE; + mr |= MSM_UART_MR2_PARITY_MODE_SPACE; else - mr |= UART_MR2_PARITY_MODE_EVEN; + mr |= MSM_UART_MR2_PARITY_MODE_EVEN; } /* calculate bits per char */ - mr &= ~UART_MR2_BITS_PER_CHAR; + mr &= ~MSM_UART_MR2_BITS_PER_CHAR; switch (termios->c_cflag & CSIZE) { case CS5: - mr |= UART_MR2_BITS_PER_CHAR_5; + mr |= MSM_UART_MR2_BITS_PER_CHAR_5; break; case CS6: - mr |= UART_MR2_BITS_PER_CHAR_6; + mr |= MSM_UART_MR2_BITS_PER_CHAR_6; break; case CS7: - mr |= UART_MR2_BITS_PER_CHAR_7; + mr |= MSM_UART_MR2_BITS_PER_CHAR_7; break; case CS8: default: - mr |= UART_MR2_BITS_PER_CHAR_8; + mr |= MSM_UART_MR2_BITS_PER_CHAR_8; break; } /* calculate stop bits */ - mr &= ~(UART_MR2_STOP_BIT_LEN_ONE | UART_MR2_STOP_BIT_LEN_TWO); + mr &= ~(MSM_UART_MR2_STOP_BIT_LEN_ONE | MSM_UART_MR2_STOP_BIT_LEN_TWO); if (termios->c_cflag & CSTOPB) - mr |= UART_MR2_STOP_BIT_LEN_TWO; + mr |= MSM_UART_MR2_STOP_BIT_LEN_TWO; else - mr |= UART_MR2_STOP_BIT_LEN_ONE; + mr |= MSM_UART_MR2_STOP_BIT_LEN_ONE; /* set parity, bits per char, and stop bit */ - msm_write(port, mr, UART_MR2); + msm_write(port, mr, MSM_UART_MR2); /* calculate and set hardware flow control */ - mr = msm_read(port, UART_MR1); - mr &= ~(UART_MR1_CTS_CTL | UART_MR1_RX_RDY_CTL); + mr = msm_read(port, MSM_UART_MR1); + mr &= ~(MSM_UART_MR1_CTS_CTL | MSM_UART_MR1_RX_RDY_CTL); if (termios->c_cflag & CRTSCTS) { - mr |= UART_MR1_CTS_CTL; - mr |= UART_MR1_RX_RDY_CTL; + mr |= MSM_UART_MR1_CTS_CTL; + mr |= MSM_UART_MR1_RX_RDY_CTL; } - msm_write(port, mr, UART_MR1); + msm_write(port, mr, MSM_UART_MR1); /* Configure status bits to ignore based on termio flags. */ port->read_status_mask = 0; if (termios->c_iflag & INPCK) - port->read_status_mask |= UART_SR_PAR_FRAME_ERR; + port->read_status_mask |= MSM_UART_SR_PAR_FRAME_ERR; if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK)) - port->read_status_mask |= UART_SR_RX_BREAK; + port->read_status_mask |= MSM_UART_SR_RX_BREAK; uart_update_timeout(port, termios->c_cflag, baud); @@ -1416,7 +1419,7 @@ static int msm_verify_port(struct uart_port *port, struct serial_struct *ser) static void msm_power(struct uart_port *port, unsigned int state, unsigned int oldstate) { - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); switch (state) { case 0: @@ -1435,10 +1438,10 @@ static void msm_power(struct uart_port *port, unsigned int state, #ifdef CONFIG_CONSOLE_POLL static int msm_poll_get_char_single(struct uart_port *port) { - struct msm_port *msm_port = UART_TO_MSM(port); - unsigned int rf_reg = msm_port->is_uartdm ? UARTDM_RF : UART_RF; + struct msm_port *msm_port = to_msm_port(port); + unsigned int rf_reg = msm_port->is_uartdm ? UARTDM_RF : MSM_UART_RF; - if (!(msm_read(port, UART_SR) & UART_SR_RX_READY)) + if (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_RX_READY)) return NO_POLL_CHAR; return msm_read(port, rf_reg) & 0xff; @@ -1456,7 +1459,7 @@ static int msm_poll_get_char_dm(struct uart_port *port) c = sp[sizeof(slop) - count]; count--; /* Or if FIFO is empty */ - } else if (!(msm_read(port, UART_SR) & UART_SR_RX_READY)) { + } else if (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_RX_READY)) { /* * If RX packing buffer has less than a word, force stale to * push contents into RX FIFO @@ -1464,14 +1467,13 @@ static int msm_poll_get_char_dm(struct uart_port *port) count = msm_read(port, UARTDM_RXFS); count = (count >> UARTDM_RXFS_BUF_SHIFT) & UARTDM_RXFS_BUF_MASK; if (count) { - msm_write(port, UART_CR_CMD_FORCE_STALE, UART_CR); + msm_write(port, MSM_UART_CR_CMD_FORCE_STALE, MSM_UART_CR); slop = msm_read(port, UARTDM_RF); c = sp[0]; count--; - msm_write(port, UART_CR_CMD_RESET_STALE_INT, UART_CR); + msm_write(port, MSM_UART_CR_CMD_RESET_STALE_INT, MSM_UART_CR); msm_write(port, 0xFFFFFF, UARTDM_DMRX); - msm_write(port, UART_CR_CMD_STALE_EVENT_ENABLE, - UART_CR); + msm_write(port, MSM_UART_CR_CMD_STALE_EVENT_ENABLE, MSM_UART_CR); } else { c = NO_POLL_CHAR; } @@ -1489,11 +1491,11 @@ static int msm_poll_get_char(struct uart_port *port) { u32 imr; int c; - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); /* Disable all interrupts */ - imr = msm_read(port, UART_IMR); - msm_write(port, 0, UART_IMR); + imr = msm_read(port, MSM_UART_IMR); + msm_write(port, 0, MSM_UART_IMR); if (msm_port->is_uartdm) c = msm_poll_get_char_dm(port); @@ -1501,7 +1503,7 @@ static int msm_poll_get_char(struct uart_port *port) c = msm_poll_get_char_single(port); /* Enable interrupts */ - msm_write(port, imr, UART_IMR); + msm_write(port, imr, MSM_UART_IMR); return c; } @@ -1509,28 +1511,28 @@ static int msm_poll_get_char(struct uart_port *port) static void msm_poll_put_char(struct uart_port *port, unsigned char c) { u32 imr; - struct msm_port *msm_port = UART_TO_MSM(port); + struct msm_port *msm_port = to_msm_port(port); /* Disable all interrupts */ - imr = msm_read(port, UART_IMR); - msm_write(port, 0, UART_IMR); + imr = msm_read(port, MSM_UART_IMR); + msm_write(port, 0, MSM_UART_IMR); if (msm_port->is_uartdm) msm_reset_dm_count(port, 1); /* Wait until FIFO is empty */ - while (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) + while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY)) cpu_relax(); /* Write a character */ - msm_write(port, c, msm_port->is_uartdm ? UARTDM_TF : UART_TF); + msm_write(port, c, msm_port->is_uartdm ? UARTDM_TF : MSM_UART_TF); /* Wait until FIFO is empty */ - while (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) + while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY)) cpu_relax(); /* Enable interrupts */ - msm_write(port, imr, UART_IMR); + msm_write(port, imr, MSM_UART_IMR); } #endif @@ -1588,7 +1590,7 @@ static struct msm_port msm_uart_ports[] = { }, }; -#define UART_NR ARRAY_SIZE(msm_uart_ports) +#define MSM_UART_NR ARRAY_SIZE(msm_uart_ports) static inline struct uart_port *msm_get_port_from_line(unsigned int line) { @@ -1609,7 +1611,7 @@ static void __msm_console_write(struct uart_port *port, const char *s, if (is_uartdm) tf = port->membase + UARTDM_TF; else - tf = port->membase + UART_TF; + tf = port->membase + MSM_UART_TF; /* Account for newlines that will get a carriage return added */ for (i = 0; i < count; i++) @@ -1655,7 +1657,7 @@ static void __msm_console_write(struct uart_port *port, const char *s, } } - while (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) + while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY)) cpu_relax(); iowrite32_rep(tf, buf, 1); @@ -1674,10 +1676,10 @@ static void msm_console_write(struct console *co, const char *s, struct uart_port *port; struct msm_port *msm_port; - BUG_ON(co->index < 0 || co->index >= UART_NR); + BUG_ON(co->index < 0 || co->index >= MSM_UART_NR); port = msm_get_port_from_line(co->index); - msm_port = UART_TO_MSM(port); + msm_port = to_msm_port(port); __msm_console_write(port, s, count, msm_port->is_uartdm); } @@ -1690,7 +1692,7 @@ static int msm_console_setup(struct console *co, char *options) int parity = 'n'; int flow = 'n'; - if (unlikely(co->index >= UART_NR || co->index < 0)) + if (unlikely(co->index >= MSM_UART_NR || co->index < 0)) return -ENXIO; port = msm_get_port_from_line(co->index); @@ -1771,7 +1773,7 @@ static struct uart_driver msm_uart_driver = { .owner = THIS_MODULE, .driver_name = "msm_serial", .dev_name = "ttyMSM", - .nr = UART_NR, + .nr = MSM_UART_NR, .cons = MSM_CONSOLE, }; @@ -1801,14 +1803,14 @@ static int msm_serial_probe(struct platform_device *pdev) if (line < 0) line = atomic_inc_return(&msm_uart_next_id) - 1; - if (unlikely(line < 0 || line >= UART_NR)) + if (unlikely(line < 0 || line >= MSM_UART_NR)) return -ENXIO; dev_info(&pdev->dev, "msm_serial: detected port #%d\n", line); port = msm_get_port_from_line(line); port->dev = &pdev->dev; - msm_port = UART_TO_MSM(port); + msm_port = to_msm_port(port); id = of_match_device(msm_uartdm_table, &pdev->dev); if (id) diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c index 643dfbcc43f9..0ba0f4d9459d 100644 --- a/drivers/tty/serial/mux.c +++ b/drivers/tty/serial/mux.c @@ -481,12 +481,6 @@ static int __init mux_probe(struct parisc_device *dev) port->line = port_cnt; port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MUX_CONSOLE); - /* The port->timeout needs to match what is present in - * uart_wait_until_sent in serial_core.c. Otherwise - * the time spent in msleep_interruptable will be very - * long, causing the appearance of a console hang. - */ - port->timeout = HZ / 50; spin_lock_init(&port->lock); status = uart_add_one_port(&mux_driver, port); diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index 93489fe334d0..65eaecd10b7c 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -265,6 +265,7 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status) struct tty_port *tport = &port->state->port; unsigned char ch = 0; char flag = 0; + int ret; do { if (status & STAT_RX_RDY(port)) { @@ -277,6 +278,16 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status) port->icount.parity++; } + /* + * For UART2, error bits are not cleared on buffer read. + * This causes interrupt loop and system hang. + */ + if (IS_EXTENDED(port) && (status & STAT_BRK_ERR)) { + ret = readl(port->membase + UART_STAT); + ret |= STAT_BRK_ERR; + writel(ret, port->membase + UART_STAT); + } + if (status & STAT_BRK_DET) { port->icount.brk++; status &= ~(STAT_FRM_ERR | STAT_PAR_ERR); diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 46f4d4cacb6e..0aa666e247d5 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -19,6 +19,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/console.h> +#include <linux/serial.h> #include <linux/serial_reg.h> #include <linux/delay.h> #include <linux/slab.h> @@ -1102,8 +1103,6 @@ serial_omap_type(struct uart_port *port) return up->name; } -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - static void __maybe_unused wait_for_xmitr(struct uart_omap_port *up) { unsigned int status, tmout = 10000; @@ -1118,7 +1117,7 @@ static void __maybe_unused wait_for_xmitr(struct uart_omap_port *up) if (--tmout == 0) break; udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); + } while (!uart_lsr_tx_empty(status)); /* Wait up to 1s for flow control if necessary */ if (up->port.flags & UPF_CONS_FLOW) { @@ -1186,7 +1185,7 @@ static void omap_serial_early_putc(struct uart_port *port, unsigned char c) for (;;) { status = omap_serial_early_in(port, UART_LSR); - if ((status & BOTH_EMPTY) == BOTH_EMPTY) + if (uart_lsr_tx_empty(status)) break; cpu_relax(); } @@ -1325,7 +1324,8 @@ static inline void serial_omap_add_console_port(struct uart_omap_port *up) /* Enable or disable the rs485 support */ static int -serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485) +serial_omap_config_rs485(struct uart_port *port, struct ktermios *termios, + struct serial_rs485 *rs485) { struct uart_omap_port *up = to_uart_omap_port(port); unsigned int mode; @@ -1559,6 +1559,13 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up, return 0; } +static const struct serial_rs485 serial_omap_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND | + SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + static int serial_omap_probe(struct platform_device *pdev) { struct omap_uart_port_info *omap_up_info = dev_get_platdata(&pdev->dev); @@ -1636,6 +1643,7 @@ static int serial_omap_probe(struct platform_device *pdev) up->port.flags = omap_up_info->flags; up->port.uartclk = omap_up_info->uartclk; up->port.rs485_config = serial_omap_config_rs485; + up->port.rs485_supported = serial_omap_rs485_supported; if (!up->port.uartclk) { up->port.uartclk = DEFAULT_CLK_SPEED; dev_warn(&pdev->dev, diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c index 44d20e5a7dd3..888e17e3f25f 100644 --- a/drivers/tty/serial/owl-uart.c +++ b/drivers/tty/serial/owl-uart.c @@ -201,7 +201,7 @@ static void owl_uart_send_chars(struct uart_port *port) ch = xmit->buf[xmit->tail]; owl_uart_write(port, ch, OWL_UART_TXDAT); - xmit->tail = (xmit->tail + 1) & (SERIAL_XMIT_SIZE - 1); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); port->icount.tx++; } diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 3b26524d48e3..8a9065e4a903 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -3,6 +3,7 @@ *Copyright (C) 2011 LAPIS Semiconductor Co., Ltd. */ #include <linux/kernel.h> +#include <linux/serial.h> #include <linux/serial_reg.h> #include <linux/slab.h> #include <linux/module.h> @@ -189,8 +190,6 @@ enum { #define PCH_UART_HAL_LOOP (PCH_UART_MCR_LOOP) #define PCH_UART_HAL_AFE (PCH_UART_MCR_AFE) -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - #define DEFAULT_UARTCLK 1843200 /* 1.8432 MHz */ #define CMITC_UARTCLK 192000000 /* 192.0000 MHz */ #define FRI2_64_UARTCLK 64000000 /* 64.0000 MHz */ @@ -1516,7 +1515,7 @@ static void pch_uart_put_poll_char(struct uart_port *port, * Finally, wait for transmitter to become empty * and restore the IER */ - wait_for_xmitr(priv, BOTH_EMPTY); + wait_for_xmitr(priv, UART_LSR_BOTH_EMPTY); iowrite8(ier, priv->membase + UART_IER); } #endif /* CONFIG_CONSOLE_POLL */ @@ -1602,7 +1601,7 @@ pch_console_write(struct console *co, const char *s, unsigned int count) * Finally, wait for transmitter to become empty * and restore the IER */ - wait_for_xmitr(priv, BOTH_EMPTY); + wait_for_xmitr(priv, UART_LSR_BOTH_EMPTY); iowrite8(ier, priv->membase + UART_IER); if (port_locked) diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c index b399aac530fe..f418f1de66b3 100644 --- a/drivers/tty/serial/pic32_uart.c +++ b/drivers/tty/serial/pic32_uart.c @@ -503,7 +503,7 @@ static int pic32_uart_startup(struct uart_port *port) if (!sport->irq_fault_name) { dev_err(port->dev, "%s: kasprintf err!", __func__); ret = -ENOMEM; - goto out_done; + goto out_disable_clk; } irq_set_status_flags(sport->irq_fault, IRQ_NOAUTOEN); ret = request_irq(sport->irq_fault, pic32_uart_fault_interrupt, @@ -579,6 +579,8 @@ out_r: out_f: free_irq(sport->irq_fault, port); kfree(sport->irq_fault_name); +out_disable_clk: + clk_disable_unprepare(sport->clk); out_done: return ret; } diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index 3133446e806c..f63257b8e872 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -52,7 +52,6 @@ #ifdef CONFIG_PPC_PMAC #include <asm/machdep.h> #include <asm/pmac_feature.h> -#include <asm/dbdma.h> #include <asm/macio.h> #else #include <linux/platform_device.h> diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index e80ba8e10407..9309ffd87c8e 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -23,6 +23,7 @@ #include <linux/init.h> #include <linux/console.h> #include <linux/sysrq.h> +#include <linux/serial.h> #include <linux/serial_reg.h> #include <linux/circ_buf.h> #include <linux/delay.h> @@ -575,8 +576,6 @@ static struct uart_driver serial_pxa_reg; #ifdef CONFIG_SERIAL_PXA_CONSOLE -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - /* * Wait for transmitter & holding register to empty */ @@ -594,7 +593,7 @@ static void wait_for_xmitr(struct uart_pxa_port *up) if (--tmout == 0) break; udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); + } while (!uart_lsr_tx_empty(status)); /* Wait up to 1s for flow control if necessary */ if (up->port.flags & UPF_CONS_FLOW) { diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 6f50a0b3c364..f4698a064a4d 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -943,52 +943,63 @@ static int qcom_geni_serial_startup(struct uart_port *uport) return 0; } -static unsigned long get_clk_div_rate(struct clk *clk, unsigned int baud, - unsigned int sampling_rate, unsigned int *clk_div) +static unsigned long find_clk_rate_in_tol(struct clk *clk, unsigned int desired_clk, + unsigned int *clk_div, unsigned int percent_tol) { - unsigned long ser_clk; - unsigned long desired_clk; - unsigned long freq, prev; + unsigned long freq; unsigned long div, maxdiv; - int64_t mult; - - desired_clk = baud * sampling_rate; - if (!desired_clk) { - pr_err("%s: Invalid frequency\n", __func__); - return 0; - } + u64 mult; + unsigned long offset, abs_tol, achieved; + abs_tol = div_u64((u64)desired_clk * percent_tol, 100); maxdiv = CLK_DIV_MSK >> CLK_DIV_SHFT; - prev = 0; - - for (div = 1; div <= maxdiv; div++) { - mult = div * desired_clk; - if (mult > ULONG_MAX) + div = 1; + while (div <= maxdiv) { + mult = (u64)div * desired_clk; + if (mult != (unsigned long)mult) break; - freq = clk_round_rate(clk, (unsigned long)mult); - if (!(freq % desired_clk)) { - ser_clk = freq; - break; - } + offset = div * abs_tol; + freq = clk_round_rate(clk, mult - offset); - if (!prev) - ser_clk = freq; - else if (prev == freq) + /* Can only get lower if we're done */ + if (freq < mult - offset) break; - prev = freq; - } + /* + * Re-calculate div in case rounding skipped rates but we + * ended up at a good one, then check for a match. + */ + div = DIV_ROUND_CLOSEST(freq, desired_clk); + achieved = DIV_ROUND_CLOSEST(freq, div); + if (achieved <= desired_clk + abs_tol && + achieved >= desired_clk - abs_tol) { + *clk_div = div; + return freq; + } - if (!ser_clk) { - pr_err("%s: Can't find matching DFS entry for baud %d\n", - __func__, baud); - return ser_clk; + div = DIV_ROUND_UP(freq, desired_clk); } - *clk_div = ser_clk / desired_clk; - if (!(*clk_div)) - *clk_div = 1; + return 0; +} + +static unsigned long get_clk_div_rate(struct clk *clk, unsigned int baud, + unsigned int sampling_rate, unsigned int *clk_div) +{ + unsigned long ser_clk; + unsigned long desired_clk; + + desired_clk = baud * sampling_rate; + if (!desired_clk) + return 0; + + /* + * try to find a clock rate within 2% tolerance, then within 5% + */ + ser_clk = find_clk_rate_in_tol(clk, desired_clk, clk_div, 2); + if (!ser_clk) + ser_clk = find_clk_rate_in_tol(clk, desired_clk, clk_div, 5); return ser_clk; } @@ -1023,8 +1034,15 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport, clk_rate = get_clk_div_rate(port->se.clk, baud, sampling_rate, &clk_div); - if (!clk_rate) + if (!clk_rate) { + dev_err(port->se.dev, + "Couldn't find suitable clock rate for %u\n", + baud * sampling_rate); goto out_restart_rx; + } + + dev_dbg(port->se.dev, "desired_rate-%u, clk_rate-%lu, clk_div-%u\n", + baud * sampling_rate, clk_rate, clk_div); uport->uartclk = clk_rate; dev_pm_opp_set_rate(uport->dev, clk_rate); diff --git a/drivers/tty/serial/rda-uart.c b/drivers/tty/serial/rda-uart.c index f556b4955f59..feb2054aba37 100644 --- a/drivers/tty/serial/rda-uart.c +++ b/drivers/tty/serial/rda-uart.c @@ -353,7 +353,7 @@ static void rda_uart_send_chars(struct uart_port *port) ch = xmit->buf[xmit->tail]; rda_uart_write(port, ch, RDA_UART_RXTX_BUFFER); - xmit->tail = (xmit->tail + 1) & (SERIAL_XMIT_SIZE - 1); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); port->icount.tx++; } diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 1afe47b62ad5..b7a4b47ce74e 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -48,6 +48,12 @@ #define S3C24XX_SERIAL_MAJOR 204 #define S3C24XX_SERIAL_MINOR 64 +#ifdef CONFIG_ARM64 +#define UART_NR 12 +#else +#define UART_NR CONFIG_SERIAL_SAMSUNG_UARTS +#endif + #define S3C24XX_TX_PIO 1 #define S3C24XX_TX_DMA 2 #define S3C24XX_RX_PIO 1 @@ -87,7 +93,7 @@ struct s3c24xx_uart_info { struct s3c24xx_serial_drv_data { const struct s3c24xx_uart_info info; const struct s3c2410_uartcfg def_cfg; - const unsigned int fifosize[CONFIG_SERIAL_SAMSUNG_UARTS]; + const unsigned int fifosize[UART_NR]; }; struct s3c24xx_uart_dma { @@ -1011,6 +1017,7 @@ static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) { unsigned int umcon = rd_regl(port, S3C2410_UMCON); + unsigned int ucon = rd_regl(port, S3C2410_UCON); if (mctrl & TIOCM_RTS) umcon |= S3C2410_UMCOM_RTS_LOW; @@ -1018,6 +1025,13 @@ static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) umcon &= ~S3C2410_UMCOM_RTS_LOW; wr_regl(port, S3C2410_UMCON, umcon); + + if (mctrl & TIOCM_LOOP) + ucon |= S3C2410_UCON_LOOPBACK; + else + ucon &= ~S3C2410_UCON_LOOPBACK; + + wr_regl(port, S3C2410_UCON, ucon); } static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) @@ -1801,67 +1815,27 @@ static const struct uart_ops apple_s5l_serial_ops = { static struct uart_driver s3c24xx_uart_drv = { .owner = THIS_MODULE, .driver_name = "s3c2410_serial", - .nr = CONFIG_SERIAL_SAMSUNG_UARTS, + .nr = UART_NR, .cons = S3C24XX_SERIAL_CONSOLE, .dev_name = S3C24XX_SERIAL_NAME, .major = S3C24XX_SERIAL_MAJOR, .minor = S3C24XX_SERIAL_MINOR, }; -#define __PORT_LOCK_UNLOCKED(i) \ - __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[i].port.lock) -static struct s3c24xx_uart_port -s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = { - [0] = { - .port = { - .lock = __PORT_LOCK_UNLOCKED(0), - .iotype = UPIO_MEM, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 0, - } - }, - [1] = { - .port = { - .lock = __PORT_LOCK_UNLOCKED(1), - .iotype = UPIO_MEM, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 1, - } - }, -#if CONFIG_SERIAL_SAMSUNG_UARTS > 2 - [2] = { - .port = { - .lock = __PORT_LOCK_UNLOCKED(2), - .iotype = UPIO_MEM, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 2, - } - }, -#endif -#if CONFIG_SERIAL_SAMSUNG_UARTS > 3 - [3] = { - .port = { - .lock = __PORT_LOCK_UNLOCKED(3), - .iotype = UPIO_MEM, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 3, - } - } -#endif -}; -#undef __PORT_LOCK_UNLOCKED +static struct s3c24xx_uart_port s3c24xx_serial_ports[UART_NR]; + +static void s3c24xx_serial_init_port_default(int index) { + struct uart_port *port = &s3c24xx_serial_ports[index].port; + + spin_lock_init(&port->lock); + + port->iotype = UPIO_MEM; + port->uartclk = 0; + port->fifosize = 16; + port->ops = &s3c24xx_serial_ops; + port->flags = UPF_BOOT_AUTOCONF; + port->line = index; +} /* s3c24xx_serial_resetport * @@ -2177,6 +2151,8 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) } ourport = &s3c24xx_serial_ports[index]; + s3c24xx_serial_init_port_default(index); + ourport->drv_data = s3c24xx_get_driver_data(pdev); if (!ourport->drv_data) { dev_err(&pdev->dev, "could not find driver data\n"); @@ -2575,7 +2551,7 @@ s3c24xx_serial_console_setup(struct console *co, char *options) /* is this a valid port */ - if (co->index == -1 || co->index >= CONFIG_SERIAL_SAMSUNG_UARTS) + if (co->index == -1 || co->index >= UART_NR) co->index = 0; port = &s3c24xx_serial_ports[co->index].port; diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 8472bf70477c..259e08cc347c 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1127,7 +1127,7 @@ static void sc16is7xx_set_termios(struct uart_port *port, spin_unlock_irqrestore(&port->lock, flags); } -static int sc16is7xx_config_rs485(struct uart_port *port, +static int sc16is7xx_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { struct sc16is7xx_port *s = dev_get_drvdata(port->dev); @@ -1143,7 +1143,6 @@ static int sc16is7xx_config_rs485(struct uart_port *port, return -EINVAL; } - port->rs485 = *rs485; one->config.flags |= SC16IS7XX_RECONF_RS485; kthread_queue_work(&s->kworker, &one->reg_work); @@ -1354,6 +1353,12 @@ static int sc16is7xx_gpio_direction_output(struct gpio_chip *chip, } #endif +static const struct serial_rs485 sc16is7xx_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_AFTER_SEND, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, /* Not supported but keep returning -EINVAL */ +}; + static int sc16is7xx_probe(struct device *dev, const struct sc16is7xx_devtype *devtype, struct regmap *regmap, int irq) @@ -1456,6 +1461,7 @@ static int sc16is7xx_probe(struct device *dev, s->p[i].port.iotype = UPIO_PORT; s->p[i].port.uartclk = freq; s->p[i].port.rs485_config = sc16is7xx_config_rs485; + s->p[i].port.rs485_supported = sc16is7xx_rs485_supported; s->p[i].port.ops = &sc16is7xx_ops; s->p[i].old_mctrl = 0; s->p[i].port.line = sc16is7xx_alloc_line(); diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index d942ab152f5a..ad4f3567ff90 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -441,7 +441,7 @@ static char tegra_uart_decode_rx_error(struct tegra_uart_port *tup, if (unlikely(lsr & TEGRA_UART_LSR_ANY)) { if (lsr & UART_LSR_OE) { - /* Overrrun error */ + /* Overrun error */ flag = TTY_OVERRUN; tup->uport.icount.overrun++; dev_dbg(tup->uport.dev, "Got overrun errors\n"); @@ -1080,7 +1080,7 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup) tup->rx_in_progress = 1; /* - * Enable IE_RXS for the receive status interrupts like line errros. + * Enable IE_RXS for the receive status interrupts like line errors. * Enable IE_RX_TIMEOUT to get the bytes which cannot be DMA'd. * * EORD is different interrupt than RX_TIMEOUT - RX_TIMEOUT occurs when @@ -1667,6 +1667,7 @@ static int __init tegra_uart_init(void) node = of_find_matching_node(NULL, tegra_uart_of_match); if (node) match = of_match_node(tegra_uart_of_match, node); + of_node_put(node); if (match) cdata = match->data; if (cdata) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 3dc926d6c00a..12c87cd201a7 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -97,9 +97,16 @@ static inline struct uart_port *uart_port_check(struct uart_state *state) return state->uart_port; } -/* - * This routine is used by the interrupt handler to schedule processing in - * the software interrupt portion of the driver. +/** + * uart_write_wakeup - schedule write processing + * @port: port to be processed + * + * This routine is used by the interrupt handler to schedule processing in the + * software interrupt portion of the driver. A driver is expected to call this + * function when the number of characters in the transmit buffer have dropped + * below a threshold. + * + * Locking: @port->lock should be held */ void uart_write_wakeup(struct uart_port *port) { @@ -327,13 +334,16 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) } /** - * uart_update_timeout - update per-port FIFO timeout. - * @port: uart_port structure describing the port - * @cflag: termios cflag value - * @baud: speed of the port + * uart_update_timeout - update per-port frame timing information + * @port: uart_port structure describing the port + * @cflag: termios cflag value + * @baud: speed of the port * - * Set the port FIFO timeout value. The @cflag value should - * reflect the actual hardware settings. + * Set the @port frame timing information from which the FIFO timeout value is + * derived. The @cflag value should reflect the actual hardware settings as + * number of bits, parity, stop bits and baud rate is taken into account here. + * + * Locking: caller is expected to take @port->lock */ void uart_update_timeout(struct uart_port *port, unsigned int cflag, @@ -343,35 +353,30 @@ uart_update_timeout(struct uart_port *port, unsigned int cflag, u64 frame_time; frame_time = (u64)size * NSEC_PER_SEC; - size *= port->fifosize; - - /* - * Figure the timeout to send the above number of bits. - * Add .02 seconds of slop - */ - port->timeout = (HZ * size) / baud + HZ/50; port->frame_time = DIV64_U64_ROUND_UP(frame_time, baud); } EXPORT_SYMBOL(uart_update_timeout); /** - * uart_get_baud_rate - return baud rate for a particular port - * @port: uart_port structure describing the port in question. - * @termios: desired termios settings. - * @old: old termios (or NULL) - * @min: minimum acceptable baud rate - * @max: maximum acceptable baud rate + * uart_get_baud_rate - return baud rate for a particular port + * @port: uart_port structure describing the port in question. + * @termios: desired termios settings + * @old: old termios (or %NULL) + * @min: minimum acceptable baud rate + * @max: maximum acceptable baud rate + * + * Decode the termios structure into a numeric baud rate, taking account of the + * magic 38400 baud rate (with spd_* flags), and mapping the %B0 rate to 9600 + * baud. * - * Decode the termios structure into a numeric baud rate, - * taking account of the magic 38400 baud rate (with spd_* - * flags), and mapping the %B0 rate to 9600 baud. + * If the new baud rate is invalid, try the @old termios setting. If it's still + * invalid, we try 9600 baud. * - * If the new baud rate is invalid, try the old termios setting. - * If it's still invalid, we try 9600 baud. + * The @termios structure is updated to reflect the baud rate we're actually + * going to be using. Don't do this for the case where B0 is requested ("hang + * up"). * - * Update the @termios structure to reflect the baud rate - * we're actually going to be using. Don't do this for the case - * where B0 is requested ("hang up"). + * Locking: caller dependent */ unsigned int uart_get_baud_rate(struct uart_port *port, struct ktermios *termios, @@ -456,11 +461,17 @@ uart_get_baud_rate(struct uart_port *port, struct ktermios *termios, EXPORT_SYMBOL(uart_get_baud_rate); /** - * uart_get_divisor - return uart clock divisor - * @port: uart_port structure describing the port. - * @baud: desired baud rate + * uart_get_divisor - return uart clock divisor + * @port: uart_port structure describing the port + * @baud: desired baud rate + * + * Calculate the divisor (baud_base / baud) for the specified @baud, + * appropriately rounded. * - * Calculate the uart clock divisor for the port. + * If 38400 baud and custom divisor is selected, return the custom divisor + * instead. + * + * Locking: caller dependent */ unsigned int uart_get_divisor(struct uart_port *port, unsigned int baud) @@ -1023,10 +1034,10 @@ static int uart_set_info_user(struct tty_struct *tty, struct serial_struct *ss) } /** - * uart_get_lsr_info - get line status register info - * @tty: tty associated with the UART - * @state: UART being queried - * @value: returned modem value + * uart_get_lsr_info - get line status register info + * @tty: tty associated with the UART + * @state: UART being queried + * @value: returned modem value */ static int uart_get_lsr_info(struct tty_struct *tty, struct uart_state *state, unsigned int __user *value) @@ -1276,6 +1287,126 @@ static int uart_get_icount(struct tty_struct *tty, return 0; } +#define SER_RS485_LEGACY_FLAGS (SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | \ + SER_RS485_RTS_AFTER_SEND | SER_RS485_RX_DURING_TX | \ + SER_RS485_TERMINATE_BUS) + +static int uart_check_rs485_flags(struct uart_port *port, struct serial_rs485 *rs485) +{ + u32 flags = rs485->flags; + + /* Don't return -EINVAL for unsupported legacy flags */ + flags &= ~SER_RS485_LEGACY_FLAGS; + + /* + * For any bit outside of the legacy ones that is not supported by + * the driver, return -EINVAL. + */ + if (flags & ~port->rs485_supported.flags) + return -EINVAL; + + /* Asking for address w/o addressing mode? */ + if (!(rs485->flags & SER_RS485_ADDRB) && + (rs485->flags & (SER_RS485_ADDR_RECV|SER_RS485_ADDR_DEST))) + return -EINVAL; + + /* Address given but not enabled? */ + if (!(rs485->flags & SER_RS485_ADDR_RECV) && rs485->addr_recv) + return -EINVAL; + if (!(rs485->flags & SER_RS485_ADDR_DEST) && rs485->addr_dest) + return -EINVAL; + + return 0; +} + +static void uart_sanitize_serial_rs485_delays(struct uart_port *port, + struct serial_rs485 *rs485) +{ + if (!port->rs485_supported.delay_rts_before_send) { + if (rs485->delay_rts_before_send) { + dev_warn_ratelimited(port->dev, + "%s (%d): RTS delay before sending not supported\n", + port->name, port->line); + } + rs485->delay_rts_before_send = 0; + } else if (rs485->delay_rts_before_send > RS485_MAX_RTS_DELAY) { + rs485->delay_rts_before_send = RS485_MAX_RTS_DELAY; + dev_warn_ratelimited(port->dev, + "%s (%d): RTS delay before sending clamped to %u ms\n", + port->name, port->line, rs485->delay_rts_before_send); + } + + if (!port->rs485_supported.delay_rts_after_send) { + if (rs485->delay_rts_after_send) { + dev_warn_ratelimited(port->dev, + "%s (%d): RTS delay after sending not supported\n", + port->name, port->line); + } + rs485->delay_rts_after_send = 0; + } else if (rs485->delay_rts_after_send > RS485_MAX_RTS_DELAY) { + rs485->delay_rts_after_send = RS485_MAX_RTS_DELAY; + dev_warn_ratelimited(port->dev, + "%s (%d): RTS delay after sending clamped to %u ms\n", + port->name, port->line, rs485->delay_rts_after_send); + } +} + +static void uart_sanitize_serial_rs485(struct uart_port *port, struct serial_rs485 *rs485) +{ + u32 supported_flags = port->rs485_supported.flags; + + if (!(rs485->flags & SER_RS485_ENABLED)) { + memset(rs485, 0, sizeof(*rs485)); + return; + } + + /* Pick sane settings if the user hasn't */ + if ((supported_flags & (SER_RS485_RTS_ON_SEND|SER_RS485_RTS_AFTER_SEND)) && + !(rs485->flags & SER_RS485_RTS_ON_SEND) == + !(rs485->flags & SER_RS485_RTS_AFTER_SEND)) { + dev_warn_ratelimited(port->dev, + "%s (%d): invalid RTS setting, using RTS_ON_SEND instead\n", + port->name, port->line); + rs485->flags |= SER_RS485_RTS_ON_SEND; + rs485->flags &= ~SER_RS485_RTS_AFTER_SEND; + supported_flags |= SER_RS485_RTS_ON_SEND|SER_RS485_RTS_AFTER_SEND; + } + + rs485->flags &= supported_flags; + + uart_sanitize_serial_rs485_delays(port, rs485); + + /* Return clean padding area to userspace */ + memset(rs485->padding0, 0, sizeof(rs485->padding0)); + memset(rs485->padding1, 0, sizeof(rs485->padding1)); +} + +static void uart_set_rs485_termination(struct uart_port *port, + const struct serial_rs485 *rs485) +{ + if (!(rs485->flags & SER_RS485_ENABLED)) + return; + + gpiod_set_value_cansleep(port->rs485_term_gpio, + !!(rs485->flags & SER_RS485_TERMINATE_BUS)); +} + +int uart_rs485_config(struct uart_port *port) +{ + struct serial_rs485 *rs485 = &port->rs485; + int ret; + + uart_sanitize_serial_rs485(port, rs485); + uart_set_rs485_termination(port, rs485); + + ret = port->rs485_config(port, NULL, rs485); + if (ret) + memset(rs485, 0, sizeof(*rs485)); + + return ret; +} +EXPORT_SYMBOL_GPL(uart_rs485_config); + static int uart_get_rs485_config(struct uart_port *port, struct serial_rs485 __user *rs485) { @@ -1292,7 +1423,7 @@ static int uart_get_rs485_config(struct uart_port *port, return 0; } -static int uart_set_rs485_config(struct uart_port *port, +static int uart_set_rs485_config(struct tty_struct *tty, struct uart_port *port, struct serial_rs485 __user *rs485_user) { struct serial_rs485 rs485; @@ -1305,34 +1436,14 @@ static int uart_set_rs485_config(struct uart_port *port, if (copy_from_user(&rs485, rs485_user, sizeof(*rs485_user))) return -EFAULT; - /* pick sane settings if the user hasn't */ - if (!(rs485.flags & SER_RS485_RTS_ON_SEND) == - !(rs485.flags & SER_RS485_RTS_AFTER_SEND)) { - dev_warn_ratelimited(port->dev, - "%s (%d): invalid RTS setting, using RTS_ON_SEND instead\n", - port->name, port->line); - rs485.flags |= SER_RS485_RTS_ON_SEND; - rs485.flags &= ~SER_RS485_RTS_AFTER_SEND; - } - - if (rs485.delay_rts_before_send > RS485_MAX_RTS_DELAY) { - rs485.delay_rts_before_send = RS485_MAX_RTS_DELAY; - dev_warn_ratelimited(port->dev, - "%s (%d): RTS delay before sending clamped to %u ms\n", - port->name, port->line, rs485.delay_rts_before_send); - } - - if (rs485.delay_rts_after_send > RS485_MAX_RTS_DELAY) { - rs485.delay_rts_after_send = RS485_MAX_RTS_DELAY; - dev_warn_ratelimited(port->dev, - "%s (%d): RTS delay after sending clamped to %u ms\n", - port->name, port->line, rs485.delay_rts_after_send); - } - /* Return clean padding area to userspace */ - memset(rs485.padding, 0, sizeof(rs485.padding)); + ret = uart_check_rs485_flags(port, &rs485); + if (ret) + return ret; + uart_sanitize_serial_rs485(port, &rs485); + uart_set_rs485_termination(port, &rs485); spin_lock_irqsave(&port->lock, flags); - ret = port->rs485_config(port, &rs485); + ret = port->rs485_config(port, &tty->termios, &rs485); if (!ret) port->rs485 = rs485; spin_unlock_irqrestore(&port->lock, flags); @@ -1441,6 +1552,10 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) if (ret != -ENOIOCTLCMD) goto out; + /* rs485_config requires more locking than others */ + if (cmd == TIOCGRS485) + down_write(&tty->termios_rwsem); + mutex_lock(&port->mutex); uport = uart_port_check(state); @@ -1464,7 +1579,7 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) break; case TIOCSRS485: - ret = uart_set_rs485_config(uport, uarg); + ret = uart_set_rs485_config(tty, uport, uarg); break; case TIOCSISO7816: @@ -1481,6 +1596,8 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) } out_up: mutex_unlock(&port->mutex); + if (cmd == TIOCGRS485) + up_write(&tty->termios_rwsem); out: return ret; } @@ -1628,7 +1745,7 @@ static void uart_wait_until_sent(struct tty_struct *tty, int timeout) { struct uart_state *state = tty->driver_data; struct uart_port *port; - unsigned long char_time, expire; + unsigned long char_time, expire, fifo_timeout; port = uart_port_ref(state); if (!port) @@ -1658,12 +1775,13 @@ static void uart_wait_until_sent(struct tty_struct *tty, int timeout) * amount of time to send the entire FIFO, it probably won't * ever clear. This assumes the UART isn't doing flow * control, which is currently the case. Hence, if it ever - * takes longer than port->timeout, this is probably due to a + * takes longer than FIFO timeout, this is probably due to a * UART bug of some kind. So, we clamp the timeout parameter at - * 2*port->timeout. + * 2 * FIFO timeout. */ - if (timeout == 0 || timeout > 2 * port->timeout) - timeout = 2 * port->timeout; + fifo_timeout = uart_fifo_timeout(port); + if (timeout == 0 || timeout > 2 * fifo_timeout) + timeout = 2 * fifo_timeout; } expire = jiffies + timeout; @@ -1949,11 +2067,11 @@ static void uart_port_spin_lock_init(struct uart_port *port) #if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL) /** - * uart_console_write - write a console message to a serial port - * @port: the port to write the message - * @s: array of characters - * @count: number of characters in string to write - * @putchar: function to write character to port + * uart_console_write - write a console message to a serial port + * @port: the port to write the message + * @s: array of characters + * @count: number of characters in string to write + * @putchar: function to write character to port */ void uart_console_write(struct uart_port *port, const char *s, unsigned int count, @@ -1969,10 +2087,15 @@ void uart_console_write(struct uart_port *port, const char *s, } EXPORT_SYMBOL_GPL(uart_console_write); -/* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. +/** + * uart_get_console - get uart port for console + * @ports: ports to search in + * @nr: number of @ports + * @co: console to search for + * Returns: uart_port for the console @co + * + * Check whether an invalid uart number has been specified (as @co->index), and + * if so, search for the first available port that does have console support. */ struct uart_port * __init uart_get_console(struct uart_port *ports, int nr, struct console *co) @@ -1992,24 +2115,23 @@ uart_get_console(struct uart_port *ports, int nr, struct console *co) } /** - * uart_parse_earlycon - Parse earlycon options - * @p: ptr to 2nd field (ie., just beyond '<name>,') - * @iotype: ptr for decoded iotype (out) - * @addr: ptr for decoded mapbase/iobase (out) - * @options: ptr for <options> field; NULL if not present (out) - * - * Decodes earlycon kernel command line parameters of the form - * earlycon=<name>,io|mmio|mmio16|mmio32|mmio32be|mmio32native,<addr>,<options> - * console=<name>,io|mmio|mmio16|mmio32|mmio32be|mmio32native,<addr>,<options> + * uart_parse_earlycon - Parse earlycon options + * @p: ptr to 2nd field (ie., just beyond '<name>,') + * @iotype: ptr for decoded iotype (out) + * @addr: ptr for decoded mapbase/iobase (out) + * @options: ptr for <options> field; %NULL if not present (out) * - * The optional form + * Decodes earlycon kernel command line parameters of the form: + * * earlycon=<name>,io|mmio|mmio16|mmio32|mmio32be|mmio32native,<addr>,<options> + * * console=<name>,io|mmio|mmio16|mmio32|mmio32be|mmio32native,<addr>,<options> * - * earlycon=<name>,0x<addr>,<options> - * console=<name>,0x<addr>,<options> + * The optional form: + * * earlycon=<name>,0x<addr>,<options> + * * console=<name>,0x<addr>,<options> * - * is also accepted; the returned @iotype will be UPIO_MEM. + * is also accepted; the returned @iotype will be %UPIO_MEM. * - * Returns 0 on success or -EINVAL on failure + * Returns: 0 on success or -%EINVAL on failure */ int uart_parse_earlycon(char *p, unsigned char *iotype, resource_size_t *addr, char **options) @@ -2054,16 +2176,16 @@ int uart_parse_earlycon(char *p, unsigned char *iotype, resource_size_t *addr, EXPORT_SYMBOL_GPL(uart_parse_earlycon); /** - * uart_parse_options - Parse serial port baud/parity/bits/flow control. - * @options: pointer to option string - * @baud: pointer to an 'int' variable for the baud rate. - * @parity: pointer to an 'int' variable for the parity. - * @bits: pointer to an 'int' variable for the number of data bits. - * @flow: pointer to an 'int' variable for the flow control character. + * uart_parse_options - Parse serial port baud/parity/bits/flow control. + * @options: pointer to option string + * @baud: pointer to an 'int' variable for the baud rate. + * @parity: pointer to an 'int' variable for the parity. + * @bits: pointer to an 'int' variable for the number of data bits. + * @flow: pointer to an 'int' variable for the flow control character. * - * uart_parse_options decodes a string containing the serial console - * options. The format of the string is <baud><parity><bits><flow>, - * eg: 115200n8r + * uart_parse_options() decodes a string containing the serial console + * options. The format of the string is <baud><parity><bits><flow>, + * eg: 115200n8r */ void uart_parse_options(const char *options, int *baud, int *parity, @@ -2084,13 +2206,13 @@ uart_parse_options(const char *options, int *baud, int *parity, EXPORT_SYMBOL_GPL(uart_parse_options); /** - * uart_set_options - setup the serial console parameters - * @port: pointer to the serial ports uart_port structure - * @co: console pointer - * @baud: baud rate - * @parity: parity character - 'n' (none), 'o' (odd), 'e' (even) - * @bits: number of data bits - * @flow: flow control character - 'r' (rts) + * uart_set_options - setup the serial console parameters + * @port: pointer to the serial ports uart_port structure + * @co: console pointer + * @baud: baud rate + * @parity: parity character - 'n' (none), 'o' (odd), 'e' (even) + * @bits: number of data bits + * @flow: flow control character - 'r' (rts) */ int uart_set_options(struct uart_port *port, struct console *co, @@ -2577,17 +2699,19 @@ static const struct tty_port_operations uart_port_ops = { }; /** - * uart_register_driver - register a driver with the uart core layer - * @drv: low level driver structure + * uart_register_driver - register a driver with the uart core layer + * @drv: low level driver structure + * + * Register a uart driver with the core driver. We in turn register with the + * tty layer, and initialise the core driver per-port state. * - * Register a uart driver with the core driver. We in turn register - * with the tty layer, and initialise the core driver per-port state. + * We have a proc file in /proc/tty/driver which is named after the normal + * driver. * - * We have a proc file in /proc/tty/driver which is named after the - * normal driver. + * @drv->port should be %NULL, and the per-port structures should be registered + * using uart_add_one_port() after this call has succeeded. * - * drv->port should be NULL, and the per-port structures should be - * registered using uart_add_one_port after this call has succeeded. + * Locking: none, Interrupts: enabled */ int uart_register_driver(struct uart_driver *drv) { @@ -2651,13 +2775,14 @@ out: EXPORT_SYMBOL(uart_register_driver); /** - * uart_unregister_driver - remove a driver from the uart core layer - * @drv: low level driver structure + * uart_unregister_driver - remove a driver from the uart core layer + * @drv: low level driver structure * - * Remove all references to a driver from the core driver. The low - * level driver must have removed all its ports via the - * uart_remove_one_port() if it registered them with uart_add_one_port(). - * (ie, drv->port == NULL) + * Remove all references to a driver from the core driver. The low level + * driver must have removed all its ports via the uart_remove_one_port() if it + * registered them with uart_add_one_port(). (I.e. @drv->port is %NULL.) + * + * Locking: none, Interrupts: enabled */ void uart_unregister_driver(struct uart_driver *drv) { @@ -2906,16 +3031,15 @@ static const struct attribute_group tty_dev_attr_group = { }; /** - * uart_add_one_port - attach a driver-defined port structure - * @drv: pointer to the uart low level driver structure for this port - * @uport: uart port structure to use for this port. + * uart_add_one_port - attach a driver-defined port structure + * @drv: pointer to the uart low level driver structure for this port + * @uport: uart port structure to use for this port. * - * Context: task context, might sleep + * Context: task context, might sleep * - * This allows the driver to register its own uart_port structure - * with the core driver. The main purpose is to allow the low - * level uart drivers to expand uart_port, rather than having yet - * more levels of structures. + * This allows the driver @drv to register its own uart_port structure with the + * core driver. The main purpose is to allow the low level uart drivers to + * expand uart_port, rather than having yet more levels of structures. */ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) { @@ -3010,15 +3134,14 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) EXPORT_SYMBOL(uart_add_one_port); /** - * uart_remove_one_port - detach a driver defined port structure - * @drv: pointer to the uart low level driver structure for this port - * @uport: uart port structure for this port + * uart_remove_one_port - detach a driver defined port structure + * @drv: pointer to the uart low level driver structure for this port + * @uport: uart port structure for this port * - * Context: task context, might sleep + * Context: task context, might sleep * - * This unhooks (and hangs up) the specified port structure from the - * core driver. No further calls will be made to the low-level code - * for this port. + * This unhooks (and hangs up) the specified port structure from the core + * driver. No further calls will be made to the low-level code for this port. */ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) { @@ -3090,8 +3213,13 @@ out: } EXPORT_SYMBOL(uart_remove_one_port); -/* - * Are the two ports equivalent? +/** + * uart_match_port - are the two ports equivalent? + * @port1: first port + * @port2: second port + * + * This utility function can be used to determine whether two uart_port + * structures describe the same port. */ bool uart_match_port(const struct uart_port *port1, const struct uart_port *port2) @@ -3119,11 +3247,11 @@ bool uart_match_port(const struct uart_port *port1, EXPORT_SYMBOL(uart_match_port); /** - * uart_handle_dcd_change - handle a change of carrier detect state - * @uport: uart_port structure for the open port - * @status: new carrier detect status, nonzero if active + * uart_handle_dcd_change - handle a change of carrier detect state + * @uport: uart_port structure for the open port + * @status: new carrier detect status, nonzero if active * - * Caller must hold uport->lock + * Caller must hold uport->lock. */ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) { @@ -3154,11 +3282,11 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) EXPORT_SYMBOL_GPL(uart_handle_dcd_change); /** - * uart_handle_cts_change - handle a change of clear-to-send state - * @uport: uart_port structure for the open port - * @status: new clear to send status, nonzero if active + * uart_handle_cts_change - handle a change of clear-to-send state + * @uport: uart_port structure for the open port + * @status: new clear to send status, nonzero if active * - * Caller must hold uport->lock + * Caller must hold uport->lock. */ void uart_handle_cts_change(struct uart_port *uport, unsigned int status) { @@ -3229,15 +3357,15 @@ static void uart_sysrq_on(struct work_struct *w) static DECLARE_WORK(sysrq_enable_work, uart_sysrq_on); /** - * uart_try_toggle_sysrq - Enables SysRq from serial line - * @port: uart_port structure where char(s) after BREAK met - * @ch: new character in the sequence after received BREAK + * uart_try_toggle_sysrq - Enables SysRq from serial line + * @port: uart_port structure where char(s) after BREAK met + * @ch: new character in the sequence after received BREAK * - * Enables magic SysRq when the required sequence is met on port - * (see CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE). + * Enables magic SysRq when the required sequence is met on port + * (see CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE). * - * Returns false if @ch is out of enabling sequence and should be - * handled some other way, true if @ch was consumed. + * Returns: %false if @ch is out of enabling sequence and should be + * handled some other way, %true if @ch was consumed. */ bool uart_try_toggle_sysrq(struct uart_port *port, unsigned int ch) { @@ -3289,6 +3417,8 @@ int uart_get_rs485_mode(struct uart_port *port) rs485conf->delay_rts_after_send = 0; } + uart_sanitize_serial_rs485_delays(port, rs485conf); + /* * Clear full-duplex and enabled flags, set RTS polarity to active high * to get to a defined state with the following properties: @@ -3321,10 +3451,20 @@ int uart_get_rs485_mode(struct uart_port *port) port->rs485_term_gpio = NULL; return dev_err_probe(dev, ret, "Cannot get rs485-term-gpios\n"); } + if (port->rs485_term_gpio) + port->rs485_supported.flags |= SER_RS485_TERMINATE_BUS; return 0; } EXPORT_SYMBOL_GPL(uart_get_rs485_mode); +/* Compile-time assertions for serial_rs485 layout */ +static_assert(offsetof(struct serial_rs485, padding) == + (offsetof(struct serial_rs485, delay_rts_after_send) + sizeof(__u32))); +static_assert(offsetof(struct serial_rs485, padding1) == + offsetof(struct serial_rs485, padding[1])); +static_assert((offsetof(struct serial_rs485, padding[4]) + sizeof(__u32)) == + sizeof(struct serial_rs485)); + MODULE_DESCRIPTION("Serial driver core"); MODULE_LICENSE("GPL"); diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index 1663b3afc3a0..7d5aaa8d422b 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -42,6 +42,13 @@ static bool mctrl_gpio_flags_is_dir_out(unsigned int idx) return mctrl_gpios_desc[idx].flags & GPIOD_FLAGS_BIT_DIR_OUT; } +/** + * mctrl_gpio_set - set gpios according to mctrl state + * @gpios: gpios to set + * @mctrl: state to set + * + * Set the gpios according to the mctrl state. + */ void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl) { enum mctrl_gpio_idx i; @@ -63,6 +70,12 @@ void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl) } EXPORT_SYMBOL_GPL(mctrl_gpio_set); +/** + * mctrl_gpio_to_gpiod - obtain gpio_desc of modem line index + * @gpios: gpios to look into + * @gidx: index of the modem line + * Returns: the gpio_desc structure associated to the modem line index + */ struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, enum mctrl_gpio_idx gidx) { @@ -73,6 +86,14 @@ struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, } EXPORT_SYMBOL_GPL(mctrl_gpio_to_gpiod); +/** + * mctrl_gpio_get - update mctrl with the gpios values. + * @gpios: gpios to get the info from + * @mctrl: mctrl to set + * Returns: modified mctrl (the same value as in @mctrl) + * + * Update mctrl with the gpios values. + */ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl) { enum mctrl_gpio_idx i; @@ -189,6 +210,17 @@ static irqreturn_t mctrl_gpio_irq_handle(int irq, void *context) return IRQ_HANDLED; } +/** + * mctrl_gpio_init - initialize uart gpios + * @port: port to initialize gpios for + * @idx: index of the gpio in the @port's device + * + * This will get the {cts,rts,...}-gpios from device tree if they are present + * and request them, set direction etc, and return an allocated structure. + * `devm_*` functions are used, so there's no need to call mctrl_gpio_free(). + * As this sets up the irq handling, make sure to not handle changes to the + * gpio input lines in your driver, too. + */ struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx) { struct mctrl_gpios *gpios; @@ -235,6 +267,14 @@ struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx) } EXPORT_SYMBOL_GPL(mctrl_gpio_init); +/** + * mctrl_gpio_free - explicitly free uart gpios + * @dev: uart port's device + * @gpios: gpios structure to be freed + * + * This will free the requested gpios in mctrl_gpio_init(). As `devm_*` + * functions are used, there's generally no need to call this function. + */ void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; @@ -253,6 +293,10 @@ void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios) } EXPORT_SYMBOL_GPL(mctrl_gpio_free); +/** + * mctrl_gpio_enable_ms - enable irqs and handling of changes to the ms lines + * @gpios: gpios to enable + */ void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; @@ -278,6 +322,10 @@ void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios) } EXPORT_SYMBOL_GPL(mctrl_gpio_enable_ms); +/** + * mctrl_gpio_disable_ms - disable irqs and handling of changes to the ms lines + * @gpios: gpios to disable + */ void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; diff --git a/drivers/tty/serial/sifive.c b/drivers/tty/serial/sifive.c index c0869b080cc3..5c3a07546a58 100644 --- a/drivers/tty/serial/sifive.c +++ b/drivers/tty/serial/sifive.c @@ -4,16 +4,6 @@ * Copyright (C) 2018 Paul Walmsley <[email protected]> * Copyright (C) 2018-2019 SiFive * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * * Based partially on: * - drivers/tty/serial/pxa.c * - drivers/tty/serial/amba-pl011.c diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c index 1b0da603ab54..cce42f4c9bc2 100644 --- a/drivers/tty/serial/st-asc.c +++ b/drivers/tty/serial/st-asc.c @@ -17,7 +17,6 @@ #include <linux/tty_flip.h> #include <linux/delay.h> #include <linux/spinlock.h> -#include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/serial_core.h> diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 0973b03eeeaa..2c85dbf165c4 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -35,6 +35,75 @@ #include "serial_mctrl_gpio.h" #include "stm32-usart.h" + +/* Register offsets */ +static struct stm32_usart_info stm32f4_info = { + .ofs = { + .isr = 0x00, + .rdr = 0x04, + .tdr = 0x04, + .brr = 0x08, + .cr1 = 0x0c, + .cr2 = 0x10, + .cr3 = 0x14, + .gtpr = 0x18, + .rtor = UNDEF_REG, + .rqr = UNDEF_REG, + .icr = UNDEF_REG, + }, + .cfg = { + .uart_enable_bit = 13, + .has_7bits_data = false, + .fifosize = 1, + } +}; + +static struct stm32_usart_info stm32f7_info = { + .ofs = { + .cr1 = 0x00, + .cr2 = 0x04, + .cr3 = 0x08, + .brr = 0x0c, + .gtpr = 0x10, + .rtor = 0x14, + .rqr = 0x18, + .isr = 0x1c, + .icr = 0x20, + .rdr = 0x24, + .tdr = 0x28, + }, + .cfg = { + .uart_enable_bit = 0, + .has_7bits_data = true, + .has_swap = true, + .fifosize = 1, + } +}; + +static struct stm32_usart_info stm32h7_info = { + .ofs = { + .cr1 = 0x00, + .cr2 = 0x04, + .cr3 = 0x08, + .brr = 0x0c, + .gtpr = 0x10, + .rtor = 0x14, + .rqr = 0x18, + .isr = 0x1c, + .icr = 0x20, + .rdr = 0x24, + .tdr = 0x28, + }, + .cfg = { + .uart_enable_bit = 0, + .has_7bits_data = true, + .has_swap = true, + .has_wakeup = true, + .has_fifo = true, + .fifosize = 16, + } +}; + static void stm32_usart_stop_tx(struct uart_port *port); static void stm32_usart_transmit_chars(struct uart_port *port); static void __maybe_unused stm32_usart_console_putchar(struct uart_port *port, unsigned char ch); @@ -99,7 +168,7 @@ static void stm32_usart_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE, *cr1 |= rs485_deat_dedt; } -static int stm32_usart_config_rs485(struct uart_port *port, +static int stm32_usart_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485conf) { struct stm32_port *stm32_port = to_stm32_port(port); @@ -1377,6 +1446,13 @@ static void stm32_usart_deinit_port(struct stm32_port *stm32port) clk_disable_unprepare(stm32port->clk); } +static const struct serial_rs485 stm32_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND | + SER_RS485_RX_DURING_TX, + .delay_rts_before_send = 1, + .delay_rts_after_send = 1, +}; + static int stm32_usart_init_port(struct stm32_port *stm32port, struct platform_device *pdev) { @@ -1396,6 +1472,7 @@ static int stm32_usart_init_port(struct stm32_port *stm32port, port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_STM32_CONSOLE); port->irq = irq; port->rs485_config = stm32_usart_config_rs485; + port->rs485_supported = stm32_rs485_supported; ret = stm32_usart_init_rs485(port, pdev); if (ret) diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h index ee69c203b926..0ec41a732c88 100644 --- a/drivers/tty/serial/stm32-usart.h +++ b/drivers/tty/serial/stm32-usart.h @@ -38,74 +38,6 @@ struct stm32_usart_info { #define UNDEF_REG 0xff -/* Register offsets */ -struct stm32_usart_info stm32f4_info = { - .ofs = { - .isr = 0x00, - .rdr = 0x04, - .tdr = 0x04, - .brr = 0x08, - .cr1 = 0x0c, - .cr2 = 0x10, - .cr3 = 0x14, - .gtpr = 0x18, - .rtor = UNDEF_REG, - .rqr = UNDEF_REG, - .icr = UNDEF_REG, - }, - .cfg = { - .uart_enable_bit = 13, - .has_7bits_data = false, - .fifosize = 1, - } -}; - -struct stm32_usart_info stm32f7_info = { - .ofs = { - .cr1 = 0x00, - .cr2 = 0x04, - .cr3 = 0x08, - .brr = 0x0c, - .gtpr = 0x10, - .rtor = 0x14, - .rqr = 0x18, - .isr = 0x1c, - .icr = 0x20, - .rdr = 0x24, - .tdr = 0x28, - }, - .cfg = { - .uart_enable_bit = 0, - .has_7bits_data = true, - .has_swap = true, - .fifosize = 1, - } -}; - -struct stm32_usart_info stm32h7_info = { - .ofs = { - .cr1 = 0x00, - .cr2 = 0x04, - .cr3 = 0x08, - .brr = 0x0c, - .gtpr = 0x10, - .rtor = 0x14, - .rqr = 0x18, - .isr = 0x1c, - .icr = 0x20, - .rdr = 0x24, - .tdr = 0x28, - }, - .cfg = { - .uart_enable_bit = 0, - .has_7bits_data = true, - .has_swap = true, - .has_wakeup = true, - .has_fifo = true, - .fifosize = 16, - } -}; - /* USART_SR (F4) / USART_ISR (F7) */ #define USART_SR_PE BIT(0) #define USART_SR_FE BIT(1) diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c index fff50b5b82eb..84d545e5a8c7 100644 --- a/drivers/tty/serial/sunsu.c +++ b/drivers/tty/serial/sunsu.c @@ -1249,8 +1249,6 @@ static int sunsu_kbd_ms_init(struct uart_sunsu_port *up) #ifdef CONFIG_SERIAL_SUNSU_CONSOLE -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - /* * Wait for transmitter & holding register to empty */ @@ -1268,7 +1266,7 @@ static void wait_for_xmitr(struct uart_sunsu_port *up) if (--tmout == 0) break; udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); + } while (!uart_lsr_tx_empty(status)); /* Wait up to 1s for flow control if necessary */ if (up->port.flags & UPF_CONS_FLOW) { diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 6000853973c1..3cc9ef08455c 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -1137,6 +1137,8 @@ static unsigned int soc_info(unsigned int *rev_h, unsigned int *rev_l) /* No compatible property, so try the name. */ soc_string = np->name; + of_node_put(np); + /* Extract the SOC number from the "PowerPC," string */ if ((sscanf(soc_string, "PowerPC,%u", &soc) != 1) || !soc) return 0; diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c deleted file mode 100644 index e0bf003ca3a1..000000000000 --- a/drivers/tty/serial/vr41xx_siu.c +++ /dev/null @@ -1,934 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Driver for NEC VR4100 series Serial Interface Unit. - * - * Copyright (C) 2004-2008 Yoichi Yuasa <[email protected]> - * - * Based on drivers/serial/8250.c, by Russell King. - */ - -#include <linux/console.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/serial_reg.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> - -#include <linux/io.h> -#include <asm/vr41xx/siu.h> -#include <asm/vr41xx/vr41xx.h> - -#define SIU_BAUD_BASE 1152000 -#define SIU_MAJOR 204 -#define SIU_MINOR_BASE 82 - -#define RX_MAX_COUNT 256 -#define TX_MAX_COUNT 15 - -#define SIUIRSEL 0x08 - #define TMICMODE 0x20 - #define TMICTX 0x10 - #define IRMSEL 0x0c - #define IRMSEL_HP 0x08 - #define IRMSEL_TEMIC 0x04 - #define IRMSEL_SHARP 0x00 - #define IRUSESEL 0x02 - #define SIRSEL 0x01 - -static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = { - [0 ... SIU_PORTS_MAX-1] = { - .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock), - .irq = 0, - }, -}; - -#ifdef CONFIG_SERIAL_VR41XX_CONSOLE -static uint8_t lsr_break_flag[SIU_PORTS_MAX]; -#endif - -#define siu_read(port, offset) readb((port)->membase + (offset)) -#define siu_write(port, offset, value) writeb((value), (port)->membase + (offset)) - -void vr41xx_select_siu_interface(siu_interface_t interface) -{ - struct uart_port *port; - unsigned long flags; - uint8_t irsel; - - port = &siu_uart_ports[0]; - - spin_lock_irqsave(&port->lock, flags); - - irsel = siu_read(port, SIUIRSEL); - if (interface == SIU_INTERFACE_IRDA) - irsel |= SIRSEL; - else - irsel &= ~SIRSEL; - siu_write(port, SIUIRSEL, irsel); - - spin_unlock_irqrestore(&port->lock, flags); -} -EXPORT_SYMBOL_GPL(vr41xx_select_siu_interface); - -void vr41xx_use_irda(irda_use_t use) -{ - struct uart_port *port; - unsigned long flags; - uint8_t irsel; - - port = &siu_uart_ports[0]; - - spin_lock_irqsave(&port->lock, flags); - - irsel = siu_read(port, SIUIRSEL); - if (use == FIR_USE_IRDA) - irsel |= IRUSESEL; - else - irsel &= ~IRUSESEL; - siu_write(port, SIUIRSEL, irsel); - - spin_unlock_irqrestore(&port->lock, flags); -} -EXPORT_SYMBOL_GPL(vr41xx_use_irda); - -void vr41xx_select_irda_module(irda_module_t module, irda_speed_t speed) -{ - struct uart_port *port; - unsigned long flags; - uint8_t irsel; - - port = &siu_uart_ports[0]; - - spin_lock_irqsave(&port->lock, flags); - - irsel = siu_read(port, SIUIRSEL); - irsel &= ~(IRMSEL | TMICTX | TMICMODE); - switch (module) { - case SHARP_IRDA: - irsel |= IRMSEL_SHARP; - break; - case TEMIC_IRDA: - irsel |= IRMSEL_TEMIC | TMICMODE; - if (speed == IRDA_TX_4MBPS) - irsel |= TMICTX; - break; - case HP_IRDA: - irsel |= IRMSEL_HP; - break; - default: - break; - } - siu_write(port, SIUIRSEL, irsel); - - spin_unlock_irqrestore(&port->lock, flags); -} -EXPORT_SYMBOL_GPL(vr41xx_select_irda_module); - -static inline void siu_clear_fifo(struct uart_port *port) -{ - siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO); - siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - siu_write(port, UART_FCR, 0); -} - -static inline unsigned long siu_port_size(struct uart_port *port) -{ - switch (port->type) { - case PORT_VR41XX_SIU: - return 11UL; - case PORT_VR41XX_DSIU: - return 8UL; - } - - return 0; -} - -static inline unsigned int siu_check_type(struct uart_port *port) -{ - if (port->line == 0) - return PORT_VR41XX_SIU; - if (port->line == 1 && port->irq) - return PORT_VR41XX_DSIU; - - return PORT_UNKNOWN; -} - -static inline const char *siu_type_name(struct uart_port *port) -{ - switch (port->type) { - case PORT_VR41XX_SIU: - return "SIU"; - case PORT_VR41XX_DSIU: - return "DSIU"; - } - - return NULL; -} - -static unsigned int siu_tx_empty(struct uart_port *port) -{ - uint8_t lsr; - - lsr = siu_read(port, UART_LSR); - if (lsr & UART_LSR_TEMT) - return TIOCSER_TEMT; - - return 0; -} - -static void siu_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - uint8_t mcr = 0; - - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - siu_write(port, UART_MCR, mcr); -} - -static unsigned int siu_get_mctrl(struct uart_port *port) -{ - uint8_t msr; - unsigned int mctrl = 0; - - msr = siu_read(port, UART_MSR); - if (msr & UART_MSR_DCD) - mctrl |= TIOCM_CAR; - if (msr & UART_MSR_RI) - mctrl |= TIOCM_RNG; - if (msr & UART_MSR_DSR) - mctrl |= TIOCM_DSR; - if (msr & UART_MSR_CTS) - mctrl |= TIOCM_CTS; - - return mctrl; -} - -static void siu_stop_tx(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier &= ~UART_IER_THRI; - siu_write(port, UART_IER, ier); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_start_tx(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier |= UART_IER_THRI; - siu_write(port, UART_IER, ier); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_stop_rx(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier &= ~UART_IER_RLSI; - siu_write(port, UART_IER, ier); - - port->read_status_mask &= ~UART_LSR_DR; - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_enable_ms(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier |= UART_IER_MSI; - siu_write(port, UART_IER, ier); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_break_ctl(struct uart_port *port, int ctl) -{ - unsigned long flags; - uint8_t lcr; - - spin_lock_irqsave(&port->lock, flags); - - lcr = siu_read(port, UART_LCR); - if (ctl == -1) - lcr |= UART_LCR_SBC; - else - lcr &= ~UART_LCR_SBC; - siu_write(port, UART_LCR, lcr); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static inline void receive_chars(struct uart_port *port, uint8_t *status) -{ - uint8_t lsr, ch; - char flag; - int max_count = RX_MAX_COUNT; - - lsr = *status; - - do { - ch = siu_read(port, UART_RX); - port->icount.rx++; - flag = TTY_NORMAL; - -#ifdef CONFIG_SERIAL_VR41XX_CONSOLE - lsr |= lsr_break_flag[port->line]; - lsr_break_flag[port->line] = 0; -#endif - if (unlikely(lsr & (UART_LSR_BI | UART_LSR_FE | - UART_LSR_PE | UART_LSR_OE))) { - if (lsr & UART_LSR_BI) { - lsr &= ~(UART_LSR_FE | UART_LSR_PE); - port->icount.brk++; - - if (uart_handle_break(port)) - goto ignore_char; - } - - if (lsr & UART_LSR_FE) - port->icount.frame++; - if (lsr & UART_LSR_PE) - port->icount.parity++; - if (lsr & UART_LSR_OE) - port->icount.overrun++; - - lsr &= port->read_status_mask; - if (lsr & UART_LSR_BI) - flag = TTY_BREAK; - if (lsr & UART_LSR_FE) - flag = TTY_FRAME; - if (lsr & UART_LSR_PE) - flag = TTY_PARITY; - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, lsr, UART_LSR_OE, ch, flag); - - ignore_char: - lsr = siu_read(port, UART_LSR); - } while ((lsr & UART_LSR_DR) && (max_count-- > 0)); - - tty_flip_buffer_push(&port->state->port); - - *status = lsr; -} - -static inline void check_modem_status(struct uart_port *port) -{ - uint8_t msr; - - msr = siu_read(port, UART_MSR); - if ((msr & UART_MSR_ANY_DELTA) == 0) - return; - if (msr & UART_MSR_DDCD) - uart_handle_dcd_change(port, msr & UART_MSR_DCD); - if (msr & UART_MSR_TERI) - port->icount.rng++; - if (msr & UART_MSR_DDSR) - port->icount.dsr++; - if (msr & UART_MSR_DCTS) - uart_handle_cts_change(port, msr & UART_MSR_CTS); - - wake_up_interruptible(&port->state->port.delta_msr_wait); -} - -static inline void transmit_chars(struct uart_port *port) -{ - struct circ_buf *xmit; - int max_count = TX_MAX_COUNT; - - xmit = &port->state->xmit; - - if (port->x_char) { - siu_write(port, UART_TX, port->x_char); - port->icount.tx++; - port->x_char = 0; - return; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - siu_stop_tx(port); - return; - } - - do { - siu_write(port, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (max_count-- > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - siu_stop_tx(port); -} - -static irqreturn_t siu_interrupt(int irq, void *dev_id) -{ - struct uart_port *port; - uint8_t iir, lsr; - - port = (struct uart_port *)dev_id; - - iir = siu_read(port, UART_IIR); - if (iir & UART_IIR_NO_INT) - return IRQ_NONE; - - lsr = siu_read(port, UART_LSR); - if (lsr & UART_LSR_DR) - receive_chars(port, &lsr); - - check_modem_status(port); - - if (lsr & UART_LSR_THRE) - transmit_chars(port); - - return IRQ_HANDLED; -} - -static int siu_startup(struct uart_port *port) -{ - int retval; - - if (port->membase == NULL) - return -ENODEV; - - siu_clear_fifo(port); - - (void)siu_read(port, UART_LSR); - (void)siu_read(port, UART_RX); - (void)siu_read(port, UART_IIR); - (void)siu_read(port, UART_MSR); - - if (siu_read(port, UART_LSR) == 0xff) - return -ENODEV; - - retval = request_irq(port->irq, siu_interrupt, 0, siu_type_name(port), port); - if (retval) - return retval; - - if (port->type == PORT_VR41XX_DSIU) - vr41xx_enable_dsiuint(DSIUINT_ALL); - - siu_write(port, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irq(&port->lock); - siu_set_mctrl(port, port->mctrl); - spin_unlock_irq(&port->lock); - - siu_write(port, UART_IER, UART_IER_RLSI | UART_IER_RDI); - - (void)siu_read(port, UART_LSR); - (void)siu_read(port, UART_RX); - (void)siu_read(port, UART_IIR); - (void)siu_read(port, UART_MSR); - - return 0; -} - -static void siu_shutdown(struct uart_port *port) -{ - unsigned long flags; - uint8_t lcr; - - siu_write(port, UART_IER, 0); - - spin_lock_irqsave(&port->lock, flags); - - port->mctrl &= ~TIOCM_OUT2; - siu_set_mctrl(port, port->mctrl); - - spin_unlock_irqrestore(&port->lock, flags); - - lcr = siu_read(port, UART_LCR); - lcr &= ~UART_LCR_SBC; - siu_write(port, UART_LCR, lcr); - - siu_clear_fifo(port); - - (void)siu_read(port, UART_RX); - - if (port->type == PORT_VR41XX_DSIU) - vr41xx_disable_dsiuint(DSIUINT_ALL); - - free_irq(port->irq, port); -} - -static void siu_set_termios(struct uart_port *port, struct ktermios *new, - struct ktermios *old) -{ - tcflag_t c_cflag, c_iflag; - uint8_t lcr, fcr, ier; - unsigned int baud, quot; - unsigned long flags; - - c_cflag = new->c_cflag; - lcr = UART_LCR_WLEN(tty_get_char_size(c_cflag)); - - if (c_cflag & CSTOPB) - lcr |= UART_LCR_STOP; - if (c_cflag & PARENB) - lcr |= UART_LCR_PARITY; - if ((c_cflag & PARODD) != PARODD) - lcr |= UART_LCR_EPAR; - if (c_cflag & CMSPAR) - lcr |= UART_LCR_SPAR; - - baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10; - - spin_lock_irqsave(&port->lock, flags); - - uart_update_timeout(port, c_cflag, baud); - - c_iflag = new->c_iflag; - - port->read_status_mask = UART_LSR_THRE | UART_LSR_OE | UART_LSR_DR; - if (c_iflag & INPCK) - port->read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (c_iflag & (IGNBRK | BRKINT | PARMRK)) - port->read_status_mask |= UART_LSR_BI; - - port->ignore_status_mask = 0; - if (c_iflag & IGNPAR) - port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (c_iflag & IGNBRK) { - port->ignore_status_mask |= UART_LSR_BI; - if (c_iflag & IGNPAR) - port->ignore_status_mask |= UART_LSR_OE; - } - - if ((c_cflag & CREAD) == 0) - port->ignore_status_mask |= UART_LSR_DR; - - ier = siu_read(port, UART_IER); - ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(port, c_cflag)) - ier |= UART_IER_MSI; - siu_write(port, UART_IER, ier); - - siu_write(port, UART_LCR, lcr | UART_LCR_DLAB); - - siu_write(port, UART_DLL, (uint8_t)quot); - siu_write(port, UART_DLM, (uint8_t)(quot >> 8)); - - siu_write(port, UART_LCR, lcr); - - siu_write(port, UART_FCR, fcr); - - siu_set_mctrl(port, port->mctrl); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) -{ - switch (state) { - case 0: - switch (port->type) { - case PORT_VR41XX_SIU: - vr41xx_supply_clock(SIU_CLOCK); - break; - case PORT_VR41XX_DSIU: - vr41xx_supply_clock(DSIU_CLOCK); - break; - } - break; - case 3: - switch (port->type) { - case PORT_VR41XX_SIU: - vr41xx_mask_clock(SIU_CLOCK); - break; - case PORT_VR41XX_DSIU: - vr41xx_mask_clock(DSIU_CLOCK); - break; - } - break; - } -} - -static const char *siu_type(struct uart_port *port) -{ - return siu_type_name(port); -} - -static void siu_release_port(struct uart_port *port) -{ - unsigned long size; - - if (port->flags & UPF_IOREMAP) { - iounmap(port->membase); - port->membase = NULL; - } - - size = siu_port_size(port); - release_mem_region(port->mapbase, size); -} - -static int siu_request_port(struct uart_port *port) -{ - unsigned long size; - struct resource *res; - - size = siu_port_size(port); - res = request_mem_region(port->mapbase, size, siu_type_name(port)); - if (res == NULL) - return -EBUSY; - - if (port->flags & UPF_IOREMAP) { - port->membase = ioremap(port->mapbase, size); - if (port->membase == NULL) { - release_resource(res); - return -ENOMEM; - } - } - - return 0; -} - -static void siu_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = siu_check_type(port); - (void)siu_request_port(port); - } -} - -static int siu_verify_port(struct uart_port *port, struct serial_struct *serial) -{ - if (port->type != PORT_VR41XX_SIU && port->type != PORT_VR41XX_DSIU) - return -EINVAL; - if (port->irq != serial->irq) - return -EINVAL; - if (port->iotype != serial->io_type) - return -EINVAL; - if (port->mapbase != (unsigned long)serial->iomem_base) - return -EINVAL; - - return 0; -} - -static const struct uart_ops siu_uart_ops = { - .tx_empty = siu_tx_empty, - .set_mctrl = siu_set_mctrl, - .get_mctrl = siu_get_mctrl, - .stop_tx = siu_stop_tx, - .start_tx = siu_start_tx, - .stop_rx = siu_stop_rx, - .enable_ms = siu_enable_ms, - .break_ctl = siu_break_ctl, - .startup = siu_startup, - .shutdown = siu_shutdown, - .set_termios = siu_set_termios, - .pm = siu_pm, - .type = siu_type, - .release_port = siu_release_port, - .request_port = siu_request_port, - .config_port = siu_config_port, - .verify_port = siu_verify_port, -}; - -static int siu_init_ports(struct platform_device *pdev) -{ - struct uart_port *port; - struct resource *res; - int *type = dev_get_platdata(&pdev->dev); - int i; - - if (!type) - return 0; - - port = siu_uart_ports; - for (i = 0; i < SIU_PORTS_MAX; i++) { - port->type = type[i]; - if (port->type == PORT_UNKNOWN) - continue; - port->irq = platform_get_irq(pdev, i); - port->uartclk = SIU_BAUD_BASE * 16; - port->fifosize = 16; - port->regshift = 0; - port->iotype = UPIO_MEM; - port->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; - port->line = i; - res = platform_get_resource(pdev, IORESOURCE_MEM, i); - port->mapbase = res->start; - port++; - } - - return i; -} - -#ifdef CONFIG_SERIAL_VR41XX_CONSOLE - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -static void wait_for_xmitr(struct uart_port *port) -{ - int timeout = 10000; - uint8_t lsr, msr; - - do { - lsr = siu_read(port, UART_LSR); - if (lsr & UART_LSR_BI) - lsr_break_flag[port->line] = UART_LSR_BI; - - if ((lsr & BOTH_EMPTY) == BOTH_EMPTY) - break; - } while (timeout-- > 0); - - if (port->flags & UPF_CONS_FLOW) { - timeout = 1000000; - - do { - msr = siu_read(port, UART_MSR); - if ((msr & UART_MSR_CTS) != 0) - break; - } while (timeout-- > 0); - } -} - -static void siu_console_putchar(struct uart_port *port, unsigned char ch) -{ - wait_for_xmitr(port); - siu_write(port, UART_TX, ch); -} - -static void siu_console_write(struct console *con, const char *s, unsigned count) -{ - struct uart_port *port; - uint8_t ier; - - port = &siu_uart_ports[con->index]; - - ier = siu_read(port, UART_IER); - siu_write(port, UART_IER, 0); - - uart_console_write(port, s, count, siu_console_putchar); - - wait_for_xmitr(port); - siu_write(port, UART_IER, ier); -} - -static int __init siu_console_setup(struct console *con, char *options) -{ - struct uart_port *port; - int baud = 9600; - int parity = 'n'; - int bits = 8; - int flow = 'n'; - - if (con->index >= SIU_PORTS_MAX) - con->index = 0; - - port = &siu_uart_ports[con->index]; - if (port->membase == NULL) { - if (port->mapbase == 0) - return -ENODEV; - port->membase = ioremap(port->mapbase, siu_port_size(port)); - } - - if (port->type == PORT_VR41XX_SIU) - vr41xx_select_siu_interface(SIU_INTERFACE_RS232C); - - if (options != NULL) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, con, baud, parity, bits, flow); -} - -static struct uart_driver siu_uart_driver; - -static struct console siu_console = { - .name = "ttyVR", - .write = siu_console_write, - .device = uart_console_device, - .setup = siu_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &siu_uart_driver, -}; - -static int siu_console_init(void) -{ - struct uart_port *port; - int i; - - for (i = 0; i < SIU_PORTS_MAX; i++) { - port = &siu_uart_ports[i]; - port->ops = &siu_uart_ops; - } - - register_console(&siu_console); - - return 0; -} - -console_initcall(siu_console_init); - -void __init vr41xx_siu_early_setup(struct uart_port *port) -{ - if (port->type == PORT_UNKNOWN) - return; - - siu_uart_ports[port->line].line = port->line; - siu_uart_ports[port->line].type = port->type; - siu_uart_ports[port->line].uartclk = SIU_BAUD_BASE * 16; - siu_uart_ports[port->line].mapbase = port->mapbase; - siu_uart_ports[port->line].ops = &siu_uart_ops; -} - -#define SERIAL_VR41XX_CONSOLE &siu_console -#else -#define SERIAL_VR41XX_CONSOLE NULL -#endif - -static struct uart_driver siu_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "SIU", - .dev_name = "ttyVR", - .major = SIU_MAJOR, - .minor = SIU_MINOR_BASE, - .cons = SERIAL_VR41XX_CONSOLE, -}; - -static int siu_probe(struct platform_device *dev) -{ - struct uart_port *port; - int num, i, retval; - - num = siu_init_ports(dev); - if (num <= 0) - return -ENODEV; - - siu_uart_driver.nr = num; - retval = uart_register_driver(&siu_uart_driver); - if (retval) - return retval; - - for (i = 0; i < num; i++) { - port = &siu_uart_ports[i]; - port->ops = &siu_uart_ops; - port->dev = &dev->dev; - port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_VR41XX_CONSOLE); - - retval = uart_add_one_port(&siu_uart_driver, port); - if (retval < 0) { - port->dev = NULL; - break; - } - } - - if (i == 0 && retval < 0) { - uart_unregister_driver(&siu_uart_driver); - return retval; - } - - return 0; -} - -static int siu_remove(struct platform_device *dev) -{ - struct uart_port *port; - int i; - - for (i = 0; i < siu_uart_driver.nr; i++) { - port = &siu_uart_ports[i]; - if (port->dev == &dev->dev) { - uart_remove_one_port(&siu_uart_driver, port); - port->dev = NULL; - } - } - - uart_unregister_driver(&siu_uart_driver); - - return 0; -} - -static int siu_suspend(struct platform_device *dev, pm_message_t state) -{ - struct uart_port *port; - int i; - - for (i = 0; i < siu_uart_driver.nr; i++) { - port = &siu_uart_ports[i]; - if ((port->type == PORT_VR41XX_SIU || - port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev) - uart_suspend_port(&siu_uart_driver, port); - - } - - return 0; -} - -static int siu_resume(struct platform_device *dev) -{ - struct uart_port *port; - int i; - - for (i = 0; i < siu_uart_driver.nr; i++) { - port = &siu_uart_ports[i]; - if ((port->type == PORT_VR41XX_SIU || - port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev) - uart_resume_port(&siu_uart_driver, port); - } - - return 0; -} - -static struct platform_driver siu_device_driver = { - .probe = siu_probe, - .remove = siu_remove, - .suspend = siu_suspend, - .resume = siu_resume, - .driver = { - .name = "SIU", - }, -}; - -module_platform_driver(siu_device_driver); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:SIU"); diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index 595d8b49c745..9fdecc795b6b 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -5,6 +5,7 @@ #include <linux/types.h> #include <linux/errno.h> +#include <linux/minmax.h> #include <linux/tty.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> @@ -104,6 +105,7 @@ static void tty_buffer_reset(struct tty_buffer *p, size_t size) p->size = size; p->next = NULL; p->commit = 0; + p->lookahead = 0; p->read = 0; p->flags = 0; } @@ -234,6 +236,7 @@ void tty_buffer_flush(struct tty_struct *tty, struct tty_ldisc *ld) buf->head = next; } buf->head->read = buf->head->commit; + buf->head->lookahead = buf->head->read; if (ld && ld->ops->flush_buffer) ld->ops->flush_buffer(tty); @@ -276,13 +279,15 @@ static int __tty_buffer_request_room(struct tty_port *port, size_t size, if (n != NULL) { n->flags = flags; buf->tail = n; - /* paired w/ acquire in flush_to_ldisc(); ensures - * flush_to_ldisc() sees buffer data. + /* + * Paired w/ acquire in flush_to_ldisc() and lookahead_bufs() + * ensures they see all buffer data. */ smp_store_release(&b->commit, b->used); - /* paired w/ acquire in flush_to_ldisc(); ensures the - * latest commit value can be read before the head is - * advanced to the next buffer + /* + * Paired w/ acquire in flush_to_ldisc() and lookahead_bufs() + * ensures the latest commit value can be read before the head + * is advanced to the next buffer. */ smp_store_release(&b->next, n); } else if (change) @@ -459,6 +464,40 @@ int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p, } EXPORT_SYMBOL_GPL(tty_ldisc_receive_buf); +static void lookahead_bufs(struct tty_port *port, struct tty_buffer *head) +{ + head->lookahead = max(head->lookahead, head->read); + + while (head) { + struct tty_buffer *next; + unsigned char *p, *f = NULL; + unsigned int count; + + /* + * Paired w/ release in __tty_buffer_request_room(); + * ensures commit value read is not stale if the head + * is advancing to the next buffer. + */ + next = smp_load_acquire(&head->next); + /* + * Paired w/ release in __tty_buffer_request_room() or in + * tty_buffer_flush(); ensures we see the committed buffer data. + */ + count = smp_load_acquire(&head->commit) - head->lookahead; + if (!count) { + head = next; + continue; + } + + p = char_buf_ptr(head, head->lookahead); + if (~head->flags & TTYB_NORMAL) + f = flag_buf_ptr(head, head->lookahead); + + port->client_ops->lookahead_buf(port, p, f, count); + head->lookahead += count; + } +} + static int receive_buf(struct tty_port *port, struct tty_buffer *head, int count) { @@ -496,7 +535,7 @@ static void flush_to_ldisc(struct work_struct *work) while (1) { struct tty_buffer *head = buf->head; struct tty_buffer *next; - int count; + int count, rcvd; /* Ldisc or user is trying to gain exclusive access */ if (atomic_read(&buf->priority)) @@ -519,10 +558,12 @@ static void flush_to_ldisc(struct work_struct *work) continue; } - count = receive_buf(port, head, count); - if (!count) + rcvd = receive_buf(port, head, count); + head->read += rcvd; + if (rcvd < count) + lookahead_bufs(port, head); + if (!rcvd) break; - head->read += count; if (need_resched()) cond_resched(); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 8fec1d8648f5..82a8855981f7 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1663,7 +1663,7 @@ void tty_kclose(struct tty_struct *tty) */ tty_ldisc_release(tty); - /* Wait for pending work before tty destruction commmences */ + /* Wait for pending work before tty destruction commences */ tty_flush_works(tty); tty_debug_hangup(tty, "freeing structure\n"); diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index adae687f654b..2a76b330e108 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -319,6 +319,8 @@ unsigned char tty_get_frame_size(unsigned int cflag) bits++; if (cflag & PARENB) bits++; + if (cflag & ADDRB) + bits++; return bits; } @@ -353,6 +355,8 @@ int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios) old_termios = tty->termios; tty->termios = *new_termios; unset_locked_termios(tty, &old_termios); + /* Reset any ADDRB changes, ADDRB is changed through ->rs485_config() */ + tty->termios.c_cflag ^= (tty->termios.c_cflag ^ old_termios.c_cflag) & ADDRB; if (tty->ops->set_termios) tty->ops->set_termios(tty, &old_termios); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 880608a65773..dce08a6d7b5e 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -43,6 +43,26 @@ static int tty_port_default_receive_buf(struct tty_port *port, return ret; } +static void tty_port_default_lookahead_buf(struct tty_port *port, const unsigned char *p, + const unsigned char *f, unsigned int count) +{ + struct tty_struct *tty; + struct tty_ldisc *disc; + + tty = READ_ONCE(port->itty); + if (!tty) + return; + + disc = tty_ldisc_ref(tty); + if (!disc) + return; + + if (disc->ops->lookahead_buf) + disc->ops->lookahead_buf(disc->tty, p, f, count); + + tty_ldisc_deref(disc); +} + static void tty_port_default_wakeup(struct tty_port *port) { struct tty_struct *tty = tty_port_tty_get(port); @@ -55,6 +75,7 @@ static void tty_port_default_wakeup(struct tty_port *port) const struct tty_port_client_operations tty_port_default_client_ops = { .receive_buf = tty_port_default_receive_buf, + .lookahead_buf = tty_port_default_lookahead_buf, .write_wakeup = tty_port_default_wakeup, }; EXPORT_SYMBOL_GPL(tty_port_default_client_ops); diff --git a/drivers/tty/vt/Makefile b/drivers/tty/vt/Makefile index fe30ce512819..b3dfe9d5717e 100644 --- a/drivers/tty/vt/Makefile +++ b/drivers/tty/vt/Makefile @@ -30,6 +30,6 @@ $(obj)/defkeymap.o: $(obj)/defkeymap.c ifdef GENERATE_KEYMAP $(obj)/defkeymap.c: $(obj)/%.c: $(src)/%.map - loadkeys --mktable $< > $@ + loadkeys --mktable --unicode $< > $@ endif diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c index d815ac98b39e..f02d21e2a96e 100644 --- a/drivers/tty/vt/consolemap.c +++ b/drivers/tty/vt/consolemap.c @@ -23,6 +23,8 @@ * stack overflow. */ +#include <linux/bitfield.h> +#include <linux/bits.h> #include <linux/module.h> #include <linux/kd.h> #include <linux/errno.h> @@ -36,9 +38,9 @@ #include <linux/vt_kern.h> #include <linux/string.h> -static unsigned short translations[][256] = { +static unsigned short translations[][E_TABSZ] = { /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */ - { + [LAT1_MAP] = { 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, @@ -71,9 +73,9 @@ static unsigned short translations[][256] = { 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff - }, + }, /* VT100 graphics mapped to Unicode */ - { + [GRAF_MAP] = { 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, @@ -108,8 +110,8 @@ static unsigned short translations[][256] = { 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff }, /* IBM Codepage 437 mapped to Unicode */ - { - 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, + [IBMPC_MAP] = { + 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c, 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8, 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc, @@ -141,9 +143,9 @@ static unsigned short translations[][256] = { 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229, 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248, 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0 - }, + }, /* User mapping -- default to codes for direct font mapping */ - { + [USER_MAP] = { 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007, 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f, 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017, @@ -184,78 +186,105 @@ static unsigned short translations[][256] = { #define MAX_GLYPH 512 /* Max possible glyph value */ -static int inv_translate[MAX_NR_CONSOLES]; +static enum translation_map inv_translate[MAX_NR_CONSOLES]; + +#define UNI_DIRS 32U +#define UNI_DIR_ROWS 32U +#define UNI_ROW_GLYPHS 64U + +#define UNI_DIR_BITS GENMASK(15, 11) +#define UNI_ROW_BITS GENMASK(10, 6) +#define UNI_GLYPH_BITS GENMASK( 5, 0) -struct uni_pagedir { - u16 **uni_pgdir[32]; +#define UNI_DIR(uni) FIELD_GET(UNI_DIR_BITS, (uni)) +#define UNI_ROW(uni) FIELD_GET(UNI_ROW_BITS, (uni)) +#define UNI_GLYPH(uni) FIELD_GET(UNI_GLYPH_BITS, (uni)) + +#define UNI(dir, row, glyph) (FIELD_PREP(UNI_DIR_BITS, (dir)) | \ + FIELD_PREP(UNI_ROW_BITS, (row)) | \ + FIELD_PREP(UNI_GLYPH_BITS, (glyph))) + +/** + * struct uni_pagedict -- unicode directory + * + * @uni_pgdir: 32*32*64 table with glyphs + * @refcount: reference count of this structure + * @sum: checksum + * @inverse_translations: best-effort inverse mapping + * @inverse_trans_unicode: best-effort inverse mapping to unicode + */ +struct uni_pagedict { + u16 **uni_pgdir[UNI_DIRS]; unsigned long refcount; unsigned long sum; - unsigned char *inverse_translations[4]; + unsigned char *inverse_translations[LAST_MAP + 1]; u16 *inverse_trans_unicode; }; -static struct uni_pagedir *dflt; +static struct uni_pagedict *dflt; -static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i) +static void set_inverse_transl(struct vc_data *conp, struct uni_pagedict *dict, + enum translation_map m) { - int j, glyph; - unsigned short *t = translations[i]; - unsigned char *q; - - if (!p) return; - q = p->inverse_translations[i]; - - if (!q) { - q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL); - if (!q) return; + unsigned short *t = translations[m]; + unsigned char *inv; + + if (!dict) + return; + inv = dict->inverse_translations[m]; + + if (!inv) { + inv = dict->inverse_translations[m] = kmalloc(MAX_GLYPH, + GFP_KERNEL); + if (!inv) + return; } - memset(q, 0, MAX_GLYPH); + memset(inv, 0, MAX_GLYPH); - for (j = 0; j < E_TABSZ; j++) { - glyph = conv_uni_to_pc(conp, t[j]); - if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) { + for (unsigned int ch = 0; ch < ARRAY_SIZE(translations[m]); ch++) { + int glyph = conv_uni_to_pc(conp, t[ch]); + if (glyph >= 0 && glyph < MAX_GLYPH && inv[glyph] < 32) { /* prefer '-' above SHY etc. */ - q[glyph] = j; + inv[glyph] = ch; } } } -static void set_inverse_trans_unicode(struct vc_data *conp, - struct uni_pagedir *p) +static void set_inverse_trans_unicode(struct uni_pagedict *dict) { - int i, j, k, glyph; - u16 **p1, *p2; - u16 *q; - - if (!p) return; - q = p->inverse_trans_unicode; - if (!q) { - q = p->inverse_trans_unicode = - kmalloc_array(MAX_GLYPH, sizeof(u16), GFP_KERNEL); - if (!q) + unsigned int d, r, g; + u16 *inv; + + if (!dict) + return; + + inv = dict->inverse_trans_unicode; + if (!inv) { + inv = dict->inverse_trans_unicode = kmalloc_array(MAX_GLYPH, + sizeof(*inv), GFP_KERNEL); + if (!inv) return; } - memset(q, 0, MAX_GLYPH * sizeof(u16)); + memset(inv, 0, MAX_GLYPH * sizeof(*inv)); - for (i = 0; i < 32; i++) { - p1 = p->uni_pgdir[i]; - if (!p1) + for (d = 0; d < UNI_DIRS; d++) { + u16 **dir = dict->uni_pgdir[d]; + if (!dir) continue; - for (j = 0; j < 32; j++) { - p2 = p1[j]; - if (!p2) + for (r = 0; r < UNI_DIR_ROWS; r++) { + u16 *row = dir[r]; + if (!row) continue; - for (k = 0; k < 64; k++) { - glyph = p2[k]; - if (glyph >= 0 && glyph < MAX_GLYPH - && q[glyph] < 32) - q[glyph] = (i << 11) + (j << 6) + k; + for (g = 0; g < UNI_ROW_GLYPHS; g++) { + u16 glyph = row[g]; + if (glyph < MAX_GLYPH && inv[glyph] < 32) + inv[glyph] = UNI(d, r, g); } } } } -unsigned short *set_translate(int m, struct vc_data *vc) +unsigned short *set_translate(enum translation_map m, struct vc_data *vc) { inv_translate[vc->vc_num] = m; return translations[m]; @@ -268,44 +297,45 @@ unsigned short *set_translate(int m, struct vc_data *vc) * was active. * Still, it is now possible to a certain extent to cut and paste non-ASCII. */ -u16 inverse_translate(const struct vc_data *conp, int glyph, int use_unicode) +u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode) { - struct uni_pagedir *p; - int m; - if (glyph < 0 || glyph >= MAX_GLYPH) + struct uni_pagedict *p; + enum translation_map m; + + if (glyph >= MAX_GLYPH) return 0; - else { - p = *conp->vc_uni_pagedir_loc; - if (!p) + + p = *conp->uni_pagedict_loc; + if (!p) + return glyph; + + if (use_unicode) { + if (!p->inverse_trans_unicode) return glyph; - else if (use_unicode) { - if (!p->inverse_trans_unicode) - return glyph; - else - return p->inverse_trans_unicode[glyph]; - } else { - m = inv_translate[conp->vc_num]; - if (!p->inverse_translations[m]) - return glyph; - else - return p->inverse_translations[m][glyph]; - } + + return p->inverse_trans_unicode[glyph]; } + + m = inv_translate[conp->vc_num]; + if (!p->inverse_translations[m]) + return glyph; + + return p->inverse_translations[m][glyph]; } EXPORT_SYMBOL_GPL(inverse_translate); static void update_user_maps(void) { int i; - struct uni_pagedir *p, *q = NULL; - + struct uni_pagedict *p, *q = NULL; + for (i = 0; i < MAX_NR_CONSOLES; i++) { if (!vc_cons_allocated(i)) continue; - p = *vc_cons[i].d->vc_uni_pagedir_loc; + p = *vc_cons[i].d->uni_pagedict_loc; if (p && p != q) { set_inverse_transl(vc_cons[i].d, p, USER_MAP); - set_inverse_trans_unicode(vc_cons[i].d, p); + set_inverse_trans_unicode(p); q = p; } } @@ -321,15 +351,15 @@ static void update_user_maps(void) */ int con_set_trans_old(unsigned char __user * arg) { - int i; unsigned short inbuf[E_TABSZ]; - unsigned char ubuf[E_TABSZ]; - - if (copy_from_user(ubuf, arg, E_TABSZ)) - return -EFAULT; + unsigned int i; + unsigned char ch; - for (i = 0; i < E_TABSZ ; i++) - inbuf[i] = UNI_DIRECT_BASE | ubuf[i]; + for (i = 0; i < ARRAY_SIZE(inbuf); i++) { + if (get_user(ch, &arg[i])) + return -EFAULT; + inbuf[i] = UNI_DIRECT_BASE | ch; + } console_lock(); memcpy(translations[USER_MAP], inbuf, sizeof(inbuf)); @@ -345,7 +375,7 @@ int con_get_trans_old(unsigned char __user * arg) unsigned char outbuf[E_TABSZ]; console_lock(); - for (i = 0; i < E_TABSZ ; i++) + for (i = 0; i < ARRAY_SIZE(outbuf); i++) { ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]); outbuf[i] = (ch & ~0xff) ? 0 : ch; @@ -381,7 +411,7 @@ int con_get_trans_new(ushort __user * arg) } /* - * Unicode -> current font conversion + * Unicode -> current font conversion * * A font has at most 512 chars, usually 256. * But one font position may represent several Unicode chars. @@ -393,78 +423,82 @@ int con_get_trans_new(ushort __user * arg) extern u8 dfont_unicount[]; /* Defined in console_defmap.c */ extern u16 dfont_unitable[]; -static void con_release_unimap(struct uni_pagedir *p) +static void con_release_unimap(struct uni_pagedict *dict) { - u16 **p1; - int i, j; - - if (p == dflt) dflt = NULL; - for (i = 0; i < 32; i++) { - p1 = p->uni_pgdir[i]; - if (p1 != NULL) { - for (j = 0; j < 32; j++) - kfree(p1[j]); - kfree(p1); + unsigned int d, r; + + if (dict == dflt) + dflt = NULL; + + for (d = 0; d < UNI_DIRS; d++) { + u16 **dir = dict->uni_pgdir[d]; + if (dir != NULL) { + for (r = 0; r < UNI_DIR_ROWS; r++) + kfree(dir[r]); + kfree(dir); } - p->uni_pgdir[i] = NULL; + dict->uni_pgdir[d] = NULL; } - for (i = 0; i < 4; i++) { - kfree(p->inverse_translations[i]); - p->inverse_translations[i] = NULL; + + for (r = 0; r < ARRAY_SIZE(dict->inverse_translations); r++) { + kfree(dict->inverse_translations[r]); + dict->inverse_translations[r] = NULL; } - kfree(p->inverse_trans_unicode); - p->inverse_trans_unicode = NULL; + + kfree(dict->inverse_trans_unicode); + dict->inverse_trans_unicode = NULL; } /* Caller must hold the console lock */ void con_free_unimap(struct vc_data *vc) { - struct uni_pagedir *p; + struct uni_pagedict *p; - p = *vc->vc_uni_pagedir_loc; + p = *vc->uni_pagedict_loc; if (!p) return; - *vc->vc_uni_pagedir_loc = NULL; + *vc->uni_pagedict_loc = NULL; if (--p->refcount) return; con_release_unimap(p); kfree(p); } - -static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p) + +static int con_unify_unimap(struct vc_data *conp, struct uni_pagedict *dict1) { - int i, j, k; - struct uni_pagedir *q; - - for (i = 0; i < MAX_NR_CONSOLES; i++) { - if (!vc_cons_allocated(i)) + struct uni_pagedict *dict2; + unsigned int cons, d, r; + + for (cons = 0; cons < MAX_NR_CONSOLES; cons++) { + if (!vc_cons_allocated(cons)) continue; - q = *vc_cons[i].d->vc_uni_pagedir_loc; - if (!q || q == p || q->sum != p->sum) + dict2 = *vc_cons[cons].d->uni_pagedict_loc; + if (!dict2 || dict2 == dict1 || dict2->sum != dict1->sum) continue; - for (j = 0; j < 32; j++) { - u16 **p1, **q1; - p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j]; - if (!p1 && !q1) + for (d = 0; d < UNI_DIRS; d++) { + u16 **dir1 = dict1->uni_pgdir[d]; + u16 **dir2 = dict2->uni_pgdir[d]; + if (!dir1 && !dir2) continue; - if (!p1 || !q1) + if (!dir1 || !dir2) break; - for (k = 0; k < 32; k++) { - if (!p1[k] && !q1[k]) + for (r = 0; r < UNI_DIR_ROWS; r++) { + if (!dir1[r] && !dir2[r]) continue; - if (!p1[k] || !q1[k]) + if (!dir1[r] || !dir2[r]) break; - if (memcmp(p1[k], q1[k], 64*sizeof(u16))) + if (memcmp(dir1[r], dir2[r], UNI_ROW_GLYPHS * + sizeof(*dir1[r]))) break; } - if (k < 32) + if (r < UNI_DIR_ROWS) break; } - if (j == 32) { - q->refcount++; - *conp->vc_uni_pagedir_loc = q; - con_release_unimap(p); - kfree(p); + if (d == UNI_DIRS) { + dict2->refcount++; + *conp->uni_pagedict_loc = dict2; + con_release_unimap(dict1); + kfree(dict1); return 1; } } @@ -472,55 +506,66 @@ static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p) } static int -con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos) +con_insert_unipair(struct uni_pagedict *p, u_short unicode, u_short fontpos) { - int i, n; - u16 **p1, *p2; - - p1 = p->uni_pgdir[n = unicode >> 11]; - if (!p1) { - p1 = p->uni_pgdir[n] = kmalloc_array(32, sizeof(u16 *), - GFP_KERNEL); - if (!p1) return -ENOMEM; - for (i = 0; i < 32; i++) - p1[i] = NULL; + u16 **dir, *row; + unsigned int n; + + n = UNI_DIR(unicode); + dir = p->uni_pgdir[n]; + if (!dir) { + dir = p->uni_pgdir[n] = kcalloc(UNI_DIR_ROWS, sizeof(*dir), + GFP_KERNEL); + if (!dir) + return -ENOMEM; } - p2 = p1[n = (unicode >> 6) & 0x1f]; - if (!p2) { - p2 = p1[n] = kmalloc_array(64, sizeof(u16), GFP_KERNEL); - if (!p2) return -ENOMEM; - memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */ + n = UNI_ROW(unicode); + row = dir[n]; + if (!row) { + row = dir[n] = kmalloc_array(UNI_ROW_GLYPHS, sizeof(*row), + GFP_KERNEL); + if (!row) + return -ENOMEM; + /* No glyphs for the characters (yet) */ + memset(row, 0xff, UNI_ROW_GLYPHS * sizeof(*row)); } - p2[unicode & 0x3f] = fontpos; - + row[UNI_GLYPH(unicode)] = fontpos; + p->sum += (fontpos << 20U) + unicode; return 0; } +static int con_allocate_new(struct vc_data *vc) +{ + struct uni_pagedict *new, *old = *vc->uni_pagedict_loc; + + new = kzalloc(sizeof(*new), GFP_KERNEL); + if (!new) + return -ENOMEM; + + new->refcount = 1; + *vc->uni_pagedict_loc = new; + + if (old) + old->refcount--; + + return 0; +} + /* Caller must hold the lock */ static int con_do_clear_unimap(struct vc_data *vc) { - struct uni_pagedir *p, *q; - - p = *vc->vc_uni_pagedir_loc; - if (!p || --p->refcount) { - q = kzalloc(sizeof(*p), GFP_KERNEL); - if (!q) { - if (p) - p->refcount++; - return -ENOMEM; - } - q->refcount=1; - *vc->vc_uni_pagedir_loc = q; - } else { - if (p == dflt) dflt = NULL; - p->refcount++; - p->sum = 0; - con_release_unimap(p); - } + struct uni_pagedict *old = *vc->uni_pagedict_loc; + + if (!old || old->refcount > 1) + return con_allocate_new(vc); + + old->sum = 0; + con_release_unimap(old); + return 0; } @@ -532,91 +577,93 @@ int con_clear_unimap(struct vc_data *vc) console_unlock(); return ret; } - + +static struct uni_pagedict *con_unshare_unimap(struct vc_data *vc, + struct uni_pagedict *old) +{ + struct uni_pagedict *new; + unsigned int d, r, g; + int ret; + u16 uni = 0; + + ret = con_allocate_new(vc); + if (ret) + return ERR_PTR(ret); + + new = *vc->uni_pagedict_loc; + + /* + * uni_pgdir is a 32*32*64 table with rows allocated when its first + * entry is added. The unicode value must still be incremented for + * empty rows. We are copying entries from "old" to "new". + */ + for (d = 0; d < UNI_DIRS; d++) { + u16 **dir = old->uni_pgdir[d]; + if (!dir) { + /* Account for empty table */ + uni += UNI_DIR_ROWS * UNI_ROW_GLYPHS; + continue; + } + + for (r = 0; r < UNI_DIR_ROWS; r++) { + u16 *row = dir[r]; + if (!row) { + /* Account for row of 64 empty entries */ + uni += UNI_ROW_GLYPHS; + continue; + } + + for (g = 0; g < UNI_ROW_GLYPHS; g++, uni++) { + if (row[g] == 0xffff) + continue; + /* + * Found one, copy entry for unicode uni with + * fontpos value row[g]. + */ + ret = con_insert_unipair(new, uni, row[g]); + if (ret) { + old->refcount++; + *vc->uni_pagedict_loc = old; + con_release_unimap(new); + kfree(new); + return ERR_PTR(ret); + } + } + } + } + + return new; +} + int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) { - int err = 0, err1, i; - struct uni_pagedir *p, *q; + int err = 0, err1; + struct uni_pagedict *dict; struct unipair *unilist, *plist; if (!ct) return 0; - unilist = vmemdup_user(list, array_size(sizeof(struct unipair), ct)); + unilist = vmemdup_user(list, array_size(sizeof(*unilist), ct)); if (IS_ERR(unilist)) return PTR_ERR(unilist); console_lock(); /* Save original vc_unipagdir_loc in case we allocate a new one */ - p = *vc->vc_uni_pagedir_loc; - - if (!p) { + dict = *vc->uni_pagedict_loc; + if (!dict) { err = -EINVAL; - goto out_unlock; } - - if (p->refcount > 1) { - int j, k; - u16 **p1, *p2, l; - - err1 = con_do_clear_unimap(vc); - if (err1) { - err = err1; + + if (dict->refcount > 1) { + dict = con_unshare_unimap(vc, dict); + if (IS_ERR(dict)) { + err = PTR_ERR(dict); goto out_unlock; } - - /* - * Since refcount was > 1, con_clear_unimap() allocated a - * a new uni_pagedir for this vc. Re: p != q - */ - q = *vc->vc_uni_pagedir_loc; - - /* - * uni_pgdir is a 32*32*64 table with rows allocated - * when its first entry is added. The unicode value must - * still be incremented for empty rows. We are copying - * entries from "p" (old) to "q" (new). - */ - l = 0; /* unicode value */ - for (i = 0; i < 32; i++) { - p1 = p->uni_pgdir[i]; - if (p1) - for (j = 0; j < 32; j++) { - p2 = p1[j]; - if (p2) { - for (k = 0; k < 64; k++, l++) - if (p2[k] != 0xffff) { - /* - * Found one, copy entry for unicode - * l with fontpos value p2[k]. - */ - err1 = con_insert_unipair(q, l, p2[k]); - if (err1) { - p->refcount++; - *vc->vc_uni_pagedir_loc = p; - con_release_unimap(q); - kfree(q); - err = err1; - goto out_unlock; - } - } - } else { - /* Account for row of 64 empty entries */ - l += 64; - } - } - else - /* Account for empty table */ - l += 32 * 64; - } - - /* - * Finished copying font table, set vc_uni_pagedir to new table - */ - p = q; - } else if (p == dflt) { + } else if (dict == dflt) { dflt = NULL; } @@ -624,20 +671,20 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) * Insert user specified unicode pairs into new table. */ for (plist = unilist; ct; ct--, plist++) { - err1 = con_insert_unipair(p, plist->unicode, plist->fontpos); + err1 = con_insert_unipair(dict, plist->unicode, plist->fontpos); if (err1) err = err1; } - + /* * Merge with fontmaps of any other virtual consoles. */ - if (con_unify_unimap(vc, p)) + if (con_unify_unimap(vc, dict)) goto out_unlock; - for (i = 0; i <= 3; i++) - set_inverse_transl(vc, p, i); /* Update inverse translations */ - set_inverse_trans_unicode(vc, p); + for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++) + set_inverse_transl(vc, dict, m); + set_inverse_trans_unicode(dict); out_unlock: console_unlock(); @@ -652,55 +699,56 @@ out_unlock: * Loads the unimap for the hardware font, as defined in uni_hash.tbl. * The representation used was the most compact I could come up * with. This routine is executed at video setup, and when the - * PIO_FONTRESET ioctl is called. + * PIO_FONTRESET ioctl is called. * * The caller must hold the console lock */ int con_set_default_unimap(struct vc_data *vc) { - int i, j, err = 0, err1; - u16 *q; - struct uni_pagedir *p; + struct uni_pagedict *dict; + unsigned int fontpos, count; + int err = 0, err1; + u16 *dfont; if (dflt) { - p = *vc->vc_uni_pagedir_loc; - if (p == dflt) + dict = *vc->uni_pagedict_loc; + if (dict == dflt) return 0; dflt->refcount++; - *vc->vc_uni_pagedir_loc = dflt; - if (p && !--p->refcount) { - con_release_unimap(p); - kfree(p); + *vc->uni_pagedict_loc = dflt; + if (dict && !--dict->refcount) { + con_release_unimap(dict); + kfree(dict); } return 0; } - + /* The default font is always 256 characters */ err = con_do_clear_unimap(vc); if (err) return err; - - p = *vc->vc_uni_pagedir_loc; - q = dfont_unitable; - - for (i = 0; i < 256; i++) - for (j = dfont_unicount[i]; j; j--) { - err1 = con_insert_unipair(p, *(q++), i); + + dict = *vc->uni_pagedict_loc; + dfont = dfont_unitable; + + for (fontpos = 0; fontpos < 256U; fontpos++) + for (count = dfont_unicount[fontpos]; count; count--) { + err1 = con_insert_unipair(dict, *(dfont++), fontpos); if (err1) err = err1; } - - if (con_unify_unimap(vc, p)) { - dflt = *vc->vc_uni_pagedir_loc; + + if (con_unify_unimap(vc, dict)) { + dflt = *vc->uni_pagedict_loc; return err; } - for (i = 0; i <= 3; i++) - set_inverse_transl(vc, p, i); /* Update all inverse translations */ - set_inverse_trans_unicode(vc, p); - dflt = p; + for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++) + set_inverse_transl(vc, dict, m); + set_inverse_trans_unicode(dict); + dflt = dict; return err; } EXPORT_SYMBOL(con_set_default_unimap); @@ -714,16 +762,16 @@ EXPORT_SYMBOL(con_set_default_unimap); */ int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc) { - struct uni_pagedir *q; + struct uni_pagedict *src; - if (!*src_vc->vc_uni_pagedir_loc) + if (!*src_vc->uni_pagedict_loc) return -EINVAL; - if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc) + if (*dst_vc->uni_pagedict_loc == *src_vc->uni_pagedict_loc) return 0; con_free_unimap(dst_vc); - q = *src_vc->vc_uni_pagedir_loc; - q->refcount++; - *dst_vc->vc_uni_pagedir_loc = q; + src = *src_vc->uni_pagedict_loc; + src->refcount++; + *dst_vc->uni_pagedict_loc = src; return 0; } EXPORT_SYMBOL(con_copy_unimap); @@ -734,46 +782,53 @@ EXPORT_SYMBOL(con_copy_unimap); * Read the console unicode data for this console. Called from the ioctl * handlers. */ -int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list) +int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, + struct unipair __user *list) { - int i, j, k, ret = 0; ushort ect; - u16 **p1, *p2; - struct uni_pagedir *p; + struct uni_pagedict *dict; struct unipair *unilist; + unsigned int d, r, g; + int ret = 0; - unilist = kvmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL); + unilist = kvmalloc_array(ct, sizeof(*unilist), GFP_KERNEL); if (!unilist) return -ENOMEM; console_lock(); ect = 0; - if (*vc->vc_uni_pagedir_loc) { - p = *vc->vc_uni_pagedir_loc; - for (i = 0; i < 32; i++) { - p1 = p->uni_pgdir[i]; - if (p1) - for (j = 0; j < 32; j++) { - p2 = *(p1++); - if (p2) - for (k = 0; k < 64; k++, p2++) { - if (*p2 >= MAX_GLYPH) - continue; - if (ect < ct) { - unilist[ect].unicode = - (i<<11)+(j<<6)+k; - unilist[ect].fontpos = *p2; - } - ect++; + dict = *vc->uni_pagedict_loc; + if (!dict) + goto unlock; + + for (d = 0; d < UNI_DIRS; d++) { + u16 **dir = dict->uni_pgdir[d]; + if (!dir) + continue; + + for (r = 0; r < UNI_DIR_ROWS; r++) { + u16 *row = dir[r]; + if (!row) + continue; + + for (g = 0; g < UNI_ROW_GLYPHS; g++, row++) { + if (*row >= MAX_GLYPH) + continue; + if (ect < ct) { + unilist[ect].unicode = UNI(d, r, g); + unilist[ect].fontpos = *row; } + ect++; } } } +unlock: console_unlock(); - if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair))) + if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist))) + ret = -EFAULT; + if (put_user(ect, uct)) ret = -EFAULT; - put_user(ect, uct); kvfree(unilist); return ret ? ret : (ect <= ct) ? 0 : -ENOMEM; } @@ -798,20 +853,18 @@ u32 conv_8bit_to_uni(unsigned char c) int conv_uni_to_8bit(u32 uni) { int c; - for (c = 0; c < 0x100; c++) + for (c = 0; c < ARRAY_SIZE(translations[USER_MAP]); c++) if (translations[USER_MAP][c] == uni || (translations[USER_MAP][c] == (c | 0xf000) && uni == c)) return c; return -1; } -int -conv_uni_to_pc(struct vc_data *conp, long ucs) +int conv_uni_to_pc(struct vc_data *conp, long ucs) { - int h; - u16 **p1, *p2; - struct uni_pagedir *p; - + struct uni_pagedict *dict; + u16 **dir, *row, glyph; + /* Only 16-bit codes supported at this time */ if (ucs > 0xffff) return -4; /* Not found */ @@ -826,17 +879,24 @@ conv_uni_to_pc(struct vc_data *conp, long ucs) */ else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE) return ucs & UNI_DIRECT_MASK; - - if (!*conp->vc_uni_pagedir_loc) + + dict = *conp->uni_pagedict_loc; + if (!dict) return -3; - p = *conp->vc_uni_pagedir_loc; - if ((p1 = p->uni_pgdir[ucs >> 11]) && - (p2 = p1[(ucs >> 6) & 0x1f]) && - (h = p2[ucs & 0x3f]) < MAX_GLYPH) - return h; + dir = dict->uni_pgdir[UNI_DIR(ucs)]; + if (!dir) + return -4; - return -4; /* not found */ + row = dir[UNI_ROW(ucs)]; + if (!row) + return -4; + + glyph = row[UNI_GLYPH(ucs)]; + if (glyph >= MAX_GLYPH) + return -4; + + return glyph; } /* @@ -844,13 +904,13 @@ conv_uni_to_pc(struct vc_data *conp, long ucs) * initialized. It must be possible to call kmalloc(..., GFP_KERNEL) * from this function, hence the call from sys_setup. */ -void __init +void __init console_map_init(void) { int i; - + for (i = 0; i < MAX_NR_CONSOLES; i++) - if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc) + if (vc_cons_allocated(i) && !*vc_cons[i].d->uni_pagedict_loc) con_set_default_unimap(vc_cons[i].d); } diff --git a/drivers/tty/vt/defkeymap.c_shipped b/drivers/tty/vt/defkeymap.c_shipped index 094d95bf0005..0c043e4f292e 100644 --- a/drivers/tty/vt/defkeymap.c_shipped +++ b/drivers/tty/vt/defkeymap.c_shipped @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 -/* Do not edit this file! It was automatically generated by */ -/* loadkeys --mktable defkeymap.map > defkeymap.c */ +/* Do not edit this file! It was automatically generated by */ +/* loadkeys --mktable --unicode defkeymap.map > defkeymap.c */ #include <linux/types.h> #include <linux/keyboard.h> @@ -139,7 +139,7 @@ static unsigned short ctrl_alt_map[NR_KEYS] = { 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, }; -ushort *key_maps[MAX_NR_KEYMAPS] = { +unsigned short *key_maps[MAX_NR_KEYMAPS] = { plain_map, shift_map, altgr_map, NULL, ctrl_map, shift_ctrl_map, NULL, NULL, alt_map, NULL, NULL, NULL, diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c index f7755e73696e..6ef22f01cc51 100644 --- a/drivers/tty/vt/selection.c +++ b/drivers/tty/vt/selection.c @@ -68,7 +68,8 @@ sel_pos(int n, bool unicode) { if (unicode) return screen_glyph_unicode(vc_sel.cons, n / 2); - return inverse_translate(vc_sel.cons, screen_glyph(vc_sel.cons, n), 0); + return inverse_translate(vc_sel.cons, screen_glyph(vc_sel.cons, n), + false); } /** diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index dfc1f4b445f3..ae9c926acd6f 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -344,7 +344,7 @@ static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) /* allocate everything in one go */ memsize = cols * rows * sizeof(char32_t); memsize += rows * sizeof(char32_t *); - p = vmalloc(memsize); + p = vzalloc(memsize); if (!p) return NULL; @@ -1063,10 +1063,10 @@ static void visual_init(struct vc_data *vc, int num, int init) __module_get(vc->vc_sw->owner); vc->vc_num = num; vc->vc_display_fg = &master_display_fg; - if (vc->vc_uni_pagedir_loc) + if (vc->uni_pagedict_loc) con_free_unimap(vc); - vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; - vc->vc_uni_pagedir = NULL; + vc->uni_pagedict_loc = &vc->uni_pagedict; + vc->uni_pagedict = NULL; vc->vc_hi_font_mask = 0; vc->vc_complement_mask = 0; vc->vc_can_do_color = 0; @@ -1136,7 +1136,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */ visual_init(vc, currcons, 1); - if (!*vc->vc_uni_pagedir_loc) + if (!*vc->uni_pagedict_loc) con_set_default_unimap(vc); err = -EINVAL; @@ -3939,7 +3939,7 @@ static ssize_t show_bind(struct device *dev, struct device_attribute *attr, bind = con_is_bound(con->con); console_unlock(); - return snprintf(buf, PAGE_SIZE, "%i\n", bind); + return sysfs_emit(buf, "%i\n", bind); } static ssize_t show_name(struct device *dev, struct device_attribute *attr, @@ -3947,7 +3947,7 @@ static ssize_t show_name(struct device *dev, struct device_attribute *attr, { struct con_driver *con = dev_get_drvdata(dev); - return snprintf(buf, PAGE_SIZE, "%s %s\n", + return sysfs_emit(buf, "%s %s\n", (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", con->desc); @@ -4741,7 +4741,7 @@ u32 screen_glyph_unicode(const struct vc_data *vc, int n) if (uniscr) return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; - return inverse_translate(vc, screen_glyph(vc, n * 2), 1); + return inverse_translate(vc, screen_glyph(vc, n * 2), true); } EXPORT_SYMBOL_GPL(screen_glyph_unicode); diff --git a/drivers/usb/misc/sisusbvga/sisusb_con.c b/drivers/usb/misc/sisusbvga/sisusb_con.c index dfa0d5ce6012..fcb95fb639e0 100644 --- a/drivers/usb/misc/sisusbvga/sisusb_con.c +++ b/drivers/usb/misc/sisusbvga/sisusb_con.c @@ -248,7 +248,7 @@ sisusbcon_init(struct vc_data *c, int init) */ kref_get(&sisusb->kref); - if (!*c->vc_uni_pagedir_loc) + if (!*c->uni_pagedict_loc) con_set_default_unimap(c); mutex_unlock(&sisusb->lock); diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 576612f18d59..fcdf017e2665 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -75,7 +75,7 @@ static void vgacon_scrolldelta(struct vc_data *c, int lines); static int vgacon_set_origin(struct vc_data *c); static void vgacon_save_screen(struct vc_data *c); static void vgacon_invert_region(struct vc_data *c, u16 * p, int count); -static struct uni_pagedir *vgacon_uni_pagedir; +static struct uni_pagedict *vgacon_uni_pagedir; static int vgacon_refcount; /* Description of the hardware situation */ @@ -342,7 +342,7 @@ static const char *vgacon_startup(void) static void vgacon_init(struct vc_data *c, int init) { - struct uni_pagedir *p; + struct uni_pagedict *p; /* * We cannot be loaded as a module, therefore init will be 1 @@ -367,10 +367,10 @@ static void vgacon_init(struct vc_data *c, int init) c->vc_complement_mask = 0x7700; if (vga_512_chars) c->vc_hi_font_mask = 0x0800; - p = *c->vc_uni_pagedir_loc; - if (c->vc_uni_pagedir_loc != &vgacon_uni_pagedir) { + p = *c->uni_pagedict_loc; + if (c->uni_pagedict_loc != &vgacon_uni_pagedir) { con_free_unimap(c); - c->vc_uni_pagedir_loc = &vgacon_uni_pagedir; + c->uni_pagedict_loc = &vgacon_uni_pagedir; vgacon_refcount++; } if (!vgacon_uni_pagedir && p) @@ -392,7 +392,7 @@ static void vgacon_deinit(struct vc_data *c) if (!--vgacon_refcount) con_free_unimap(c); - c->vc_uni_pagedir_loc = &c->vc_uni_pagedir; + c->uni_pagedict_loc = &c->uni_pagedict; con_set_default_unimap(c); } diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index f114242b5a70..cf9ac4da0a82 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -1060,9 +1060,9 @@ static void fbcon_init(struct vc_data *vc, int init) vc->vc_complement_mask <<= 1; } - if (!*svc->vc_uni_pagedir_loc) + if (!*svc->uni_pagedict_loc) con_set_default_unimap(svc); - if (!*vc->vc_uni_pagedir_loc) + if (!*vc->uni_pagedict_loc) con_copy_unimap(vc, svc); ops = info->fbcon_par; @@ -1384,9 +1384,9 @@ static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, vc->vc_complement_mask <<= 1; } - if (!*svc->vc_uni_pagedir_loc) + if (!*svc->uni_pagedict_loc) con_set_default_unimap(svc); - if (!*vc->vc_uni_pagedir_loc) + if (!*vc->uni_pagedict_loc) con_copy_unimap(vc, svc); cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); diff --git a/fs/attr.c b/fs/attr.c index b5b8835ddf15..1552a5f23d6b 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -183,6 +183,8 @@ EXPORT_SYMBOL(setattr_prepare); */ int inode_newsize_ok(const struct inode *inode, loff_t offset) { + if (offset < 0) + return -EINVAL; if (inode->i_size < offset) { unsigned long limit; diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h index 4a7a2308eb72..a8f8eee4937c 100644 --- a/fs/exfat/exfat_fs.h +++ b/fs/exfat/exfat_fs.h @@ -27,9 +27,9 @@ enum exfat_error_mode { * exfat nls lossy flag */ enum { - NLS_NAME_NO_LOSSY, /* no lossy */ - NLS_NAME_LOSSY, /* just detected incorrect filename(s) */ - NLS_NAME_OVERLEN, /* the length is over than its limit */ + NLS_NAME_NO_LOSSY = 0, /* no lossy */ + NLS_NAME_LOSSY = 1 << 0, /* just detected incorrect filename(s) */ + NLS_NAME_OVERLEN = 1 << 1, /* the length is over than its limit */ }; #define EXFAT_HASH_BITS 8 @@ -483,6 +483,7 @@ struct inode *exfat_build_inode(struct super_block *sb, void exfat_hash_inode(struct inode *inode, loff_t i_pos); void exfat_unhash_inode(struct inode *inode); struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); +int __exfat_write_inode(struct inode *inode, int sync); int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); void exfat_evict_inode(struct inode *inode); int exfat_block_truncate_page(struct inode *inode, loff_t from); @@ -508,14 +509,16 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) #define exfat_fs_error_ratelimit(sb, fmt, args...) \ __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ fmt, ## args) -void exfat_msg(struct super_block *sb, const char *lv, const char *fmt, ...) - __printf(3, 4) __cold; + +/* expand to pr_*() with prefix */ #define exfat_err(sb, fmt, ...) \ - exfat_msg(sb, KERN_ERR, fmt, ##__VA_ARGS__) + pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) #define exfat_warn(sb, fmt, ...) \ - exfat_msg(sb, KERN_WARNING, fmt, ##__VA_ARGS__) + pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) #define exfat_info(sb, fmt, ...) \ - exfat_msg(sb, KERN_INFO, fmt, ##__VA_ARGS__) + pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) +#define exfat_debug(sb, fmt, ...) \ + pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, u8 tz, __le16 time, __le16 date, u8 time_cs); diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c index 9de6a6b844c9..ee0b7cf51157 100644 --- a/fs/exfat/fatent.c +++ b/fs/exfat/fatent.c @@ -331,7 +331,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, /* find new cluster */ if (hint_clu == EXFAT_EOF_CLUSTER) { if (sbi->clu_srch_ptr < EXFAT_FIRST_CLUSTER) { - exfat_err(sb, "sbi->clu_srch_ptr is invalid (%u)\n", + exfat_err(sb, "sbi->clu_srch_ptr is invalid (%u)", sbi->clu_srch_ptr); sbi->clu_srch_ptr = EXFAT_FIRST_CLUSTER; } diff --git a/fs/exfat/file.c b/fs/exfat/file.c index 20d4e47f57ab..4e0793f35e8f 100644 --- a/fs/exfat/file.c +++ b/fs/exfat/file.c @@ -101,7 +101,6 @@ int __exfat_truncate(struct inode *inode, loff_t new_size) struct super_block *sb = inode->i_sb; struct exfat_sb_info *sbi = EXFAT_SB(sb); struct exfat_inode_info *ei = EXFAT_I(inode); - int evict = (ei->dir.dir == DIR_DELETED) ? 1 : 0; /* check if the given file ID is opened */ if (ei->type != TYPE_FILE && ei->type != TYPE_DIR) @@ -149,50 +148,19 @@ int __exfat_truncate(struct inode *inode, loff_t new_size) if (ei->type == TYPE_FILE) ei->attr |= ATTR_ARCHIVE; - /* update the directory entry */ - if (!evict) { - struct timespec64 ts; - struct exfat_dentry *ep, *ep2; - struct exfat_entry_set_cache *es; - int err; - - es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry, - ES_ALL_ENTRIES); - if (!es) - return -EIO; - ep = exfat_get_dentry_cached(es, 0); - ep2 = exfat_get_dentry_cached(es, 1); - - ts = current_time(inode); - exfat_set_entry_time(sbi, &ts, - &ep->dentry.file.modify_tz, - &ep->dentry.file.modify_time, - &ep->dentry.file.modify_date, - &ep->dentry.file.modify_time_cs); - ep->dentry.file.attr = cpu_to_le16(ei->attr); - - /* File size should be zero if there is no cluster allocated */ - if (ei->start_clu == EXFAT_EOF_CLUSTER) { - ep2->dentry.stream.valid_size = 0; - ep2->dentry.stream.size = 0; - } else { - ep2->dentry.stream.valid_size = cpu_to_le64(new_size); - ep2->dentry.stream.size = ep2->dentry.stream.valid_size; - } - - if (new_size == 0) { - /* Any directory can not be truncated to zero */ - WARN_ON(ei->type != TYPE_FILE); - - ep2->dentry.stream.flags = ALLOC_FAT_CHAIN; - ep2->dentry.stream.start_clu = EXFAT_FREE_CLUSTER; - } - - exfat_update_dir_chksum_with_entry_set(es); - err = exfat_free_dentry_set(es, inode_needs_sync(inode)); - if (err) - return err; - } + /* + * update the directory entry + * + * If the directory entry is updated by mark_inode_dirty(), the + * directory entry will be written after a writeback cycle of + * updating the bitmap/FAT, which may result in clusters being + * freed but referenced by the directory entry in the event of a + * sudden power failure. + * __exfat_write_inode() is called for directory entry, bitmap + * and FAT to be written in a same writeback. + */ + if (__exfat_write_inode(inode, inode_needs_sync(inode))) + return -EIO; /* cut off from the FAT chain */ if (ei->flags == ALLOC_FAT_CHAIN && last_clu != EXFAT_FREE_CLUSTER && @@ -243,12 +211,6 @@ void exfat_truncate(struct inode *inode, loff_t size) if (err) goto write_size; - inode->i_ctime = inode->i_mtime = current_time(inode); - if (IS_DIRSYNC(inode)) - exfat_sync_inode(inode); - else - mark_inode_dirty(inode); - inode->i_blocks = round_up(i_size_read(inode), sbi->cluster_size) >> inode->i_blkbits; write_size: @@ -330,6 +292,12 @@ int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, attr->ia_valid &= ~ATTR_MODE; } + if (attr->ia_valid & ATTR_SIZE) + inode->i_mtime = inode->i_ctime = current_time(inode); + + setattr_copy(&init_user_ns, inode, attr); + exfat_truncate_atime(&inode->i_atime); + if (attr->ia_valid & ATTR_SIZE) { error = exfat_block_truncate_page(inode, attr->ia_size); if (error) @@ -337,13 +305,15 @@ int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, down_write(&EXFAT_I(inode)->truncate_lock); truncate_setsize(inode, attr->ia_size); + + /* + * __exfat_write_inode() is called from exfat_truncate(), inode + * is already written by it, so mark_inode_dirty() is unneeded. + */ exfat_truncate(inode, attr->ia_size); up_write(&EXFAT_I(inode)->truncate_lock); - } - - setattr_copy(&init_user_ns, inode, attr); - exfat_truncate_atime(&inode->i_atime); - mark_inode_dirty(inode); + } else + mark_inode_dirty(inode); out: return error; diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c index 0133d385d8e8..a795437b86d0 100644 --- a/fs/exfat/inode.c +++ b/fs/exfat/inode.c @@ -17,7 +17,7 @@ #include "exfat_raw.h" #include "exfat_fs.h" -static int __exfat_write_inode(struct inode *inode, int sync) +int __exfat_write_inode(struct inode *inode, int sync) { unsigned long long on_disk_size; struct exfat_dentry *ep, *ep2; @@ -75,6 +75,13 @@ static int __exfat_write_inode(struct inode *inode, int sync) ep2->dentry.stream.valid_size = cpu_to_le64(on_disk_size); ep2->dentry.stream.size = ep2->dentry.stream.valid_size; + if (on_disk_size) { + ep2->dentry.stream.flags = ei->flags; + ep2->dentry.stream.start_clu = cpu_to_le32(ei->start_clu); + } else { + ep2->dentry.stream.flags = ALLOC_FAT_CHAIN; + ep2->dentry.stream.start_clu = EXFAT_FREE_CLUSTER; + } exfat_update_dir_chksum_with_entry_set(es); return exfat_free_dentry_set(es, sync); @@ -105,7 +112,7 @@ void exfat_sync_inode(struct inode *inode) static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset, unsigned int *clu, int create) { - int ret, modified = false; + int ret; unsigned int last_clu; struct exfat_chain new_clu; struct super_block *sb = inode->i_sb; @@ -196,7 +203,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset, if (new_clu.flags == ALLOC_FAT_CHAIN) ei->flags = ALLOC_FAT_CHAIN; ei->start_clu = new_clu.dir; - modified = true; } else { if (new_clu.flags != ei->flags) { /* no-fat-chain bit is disabled, @@ -206,7 +212,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset, exfat_chain_cont_cluster(sb, ei->start_clu, num_clusters); ei->flags = ALLOC_FAT_CHAIN; - modified = true; } if (new_clu.flags == ALLOC_FAT_CHAIN) if (exfat_ent_set(sb, last_clu, new_clu.dir)) @@ -216,33 +221,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset, num_clusters += num_to_be_allocated; *clu = new_clu.dir; - if (ei->dir.dir != DIR_DELETED && modified) { - struct exfat_dentry *ep; - struct exfat_entry_set_cache *es; - int err; - - es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry, - ES_ALL_ENTRIES); - if (!es) - return -EIO; - /* get stream entry */ - ep = exfat_get_dentry_cached(es, 1); - - /* update directory entry */ - ep->dentry.stream.flags = ei->flags; - ep->dentry.stream.start_clu = - cpu_to_le32(ei->start_clu); - ep->dentry.stream.valid_size = - cpu_to_le64(i_size_read(inode)); - ep->dentry.stream.size = - ep->dentry.stream.valid_size; - - exfat_update_dir_chksum_with_entry_set(es); - err = exfat_free_dentry_set(es, inode_needs_sync(inode)); - if (err) - return err; - } /* end of if != DIR_DELETED */ - inode->i_blocks += num_to_be_allocated << sbi->sect_per_clus_bits; @@ -384,6 +362,7 @@ static void exfat_write_failed(struct address_space *mapping, loff_t to) if (to > i_size_read(inode)) { truncate_pagecache(inode, i_size_read(inode)); + inode->i_mtime = inode->i_ctime = current_time(inode); exfat_truncate(inode, EXFAT_I(inode)->i_size_aligned); } } diff --git a/fs/exfat/misc.c b/fs/exfat/misc.c index 9380e0188b55..2e1a1a6b1021 100644 --- a/fs/exfat/misc.c +++ b/fs/exfat/misc.c @@ -46,23 +46,6 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) } } -/* - * exfat_msg() - print preformated EXFAT specific messages. - * All logs except what uses exfat_fs_error() should be written by exfat_msg() - */ -void exfat_msg(struct super_block *sb, const char *level, const char *fmt, ...) -{ - struct va_format vaf; - va_list args; - - va_start(args, fmt); - vaf.fmt = fmt; - vaf.va = &args; - /* level means KERN_ pacility level */ - printk("%sexFAT-fs (%s): %pV\n", level, sb->s_id, &vaf); - va_end(args); -} - #define SECS_PER_MIN (60) #define TIMEZONE_SEC(x) ((x) * 15 * SECS_PER_MIN) diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c index c6eaf7e9ea74..b617bebc3d0f 100644 --- a/fs/exfat/namei.c +++ b/fs/exfat/namei.c @@ -318,7 +318,6 @@ static int exfat_find_empty_entry(struct inode *inode, unsigned int ret, last_clu; loff_t size = 0; struct exfat_chain clu; - struct exfat_dentry *ep = NULL; struct super_block *sb = inode->i_sb; struct exfat_sb_info *sbi = EXFAT_SB(sb); struct exfat_inode_info *ei = EXFAT_I(inode); @@ -383,25 +382,6 @@ static int exfat_find_empty_entry(struct inode *inode, p_dir->size++; size = EXFAT_CLU_TO_B(p_dir->size, sbi); - /* update the directory entry */ - if (p_dir->dir != sbi->root_dir) { - struct buffer_head *bh; - - ep = exfat_get_dentry(sb, - &(ei->dir), ei->entry + 1, &bh); - if (!ep) - return -EIO; - - ep->dentry.stream.valid_size = cpu_to_le64(size); - ep->dentry.stream.size = ep->dentry.stream.valid_size; - ep->dentry.stream.flags = p_dir->flags; - exfat_update_bh(bh, IS_DIRSYNC(inode)); - brelse(bh); - if (exfat_update_dir_chksum(inode, &(ei->dir), - ei->entry)) - return -EIO; - } - /* directory inode should be updated in here */ i_size_write(inode, size); ei->i_size_ondisk += sbi->cluster_size; @@ -462,7 +442,7 @@ static int __exfat_resolve_path(struct inode *inode, const unsigned char *path, return namelen; /* return error value */ if ((lossy && !lookup) || !namelen) - return -EINVAL; + return (lossy & NLS_NAME_OVERLEN) ? -ENAMETOOLONG : -EINVAL; exfat_chain_set(p_dir, ei->start_clu, EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags); diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c index ef115e673406..705710f93e2d 100644 --- a/fs/exfat/nls.c +++ b/fs/exfat/nls.c @@ -509,7 +509,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb, } if (unilen > MAX_NAME_LENGTH) { - exfat_err(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d", + exfat_debug(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d", __func__, len, unilen, MAX_NAME_LENGTH); return -ENAMETOOLONG; } @@ -671,7 +671,7 @@ static int exfat_load_upcase_table(struct super_block *sb, bh = sb_bread(sb, sector); if (!bh) { - exfat_err(sb, "failed to read sector(0x%llx)\n", + exfat_err(sb, "failed to read sector(0x%llx)", (unsigned long long)sector); ret = -EIO; goto free_table; diff --git a/fs/exfat/super.c b/fs/exfat/super.c index 6a4dfe9f31ee..35f0305cd493 100644 --- a/fs/exfat/super.c +++ b/fs/exfat/super.c @@ -464,7 +464,7 @@ static int exfat_read_boot_sector(struct super_block *sb) */ if (p_boot->sect_size_bits < EXFAT_MIN_SECT_SIZE_BITS || p_boot->sect_size_bits > EXFAT_MAX_SECT_SIZE_BITS) { - exfat_err(sb, "bogus sector size bits : %u\n", + exfat_err(sb, "bogus sector size bits : %u", p_boot->sect_size_bits); return -EINVAL; } @@ -473,7 +473,7 @@ static int exfat_read_boot_sector(struct super_block *sb) * sect_per_clus_bits could be at least 0 and at most 25 - sect_size_bits. */ if (p_boot->sect_per_clus_bits > EXFAT_MAX_SECT_PER_CLUS_BITS(p_boot)) { - exfat_err(sb, "bogus sectors bits per cluster : %u\n", + exfat_err(sb, "bogus sectors bits per cluster : %u", p_boot->sect_per_clus_bits); return -EINVAL; } diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 009e6c519e98..70e97075e535 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -729,14 +729,19 @@ out: return ret; } -void f2fs_decompress_cluster(struct decompress_io_ctx *dic) +static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, + bool pre_alloc); +static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, + bool bypass_destroy_callback, bool pre_alloc); + +void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task) { struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); struct f2fs_inode_info *fi = F2FS_I(dic->inode); const struct f2fs_compress_ops *cops = f2fs_cops[fi->i_compress_algorithm]; + bool bypass_callback = false; int ret; - int i; trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, dic->cluster_size, fi->i_compress_algorithm); @@ -746,41 +751,10 @@ void f2fs_decompress_cluster(struct decompress_io_ctx *dic) goto out_end_io; } - dic->tpages = page_array_alloc(dic->inode, dic->cluster_size); - if (!dic->tpages) { - ret = -ENOMEM; - goto out_end_io; - } - - for (i = 0; i < dic->cluster_size; i++) { - if (dic->rpages[i]) { - dic->tpages[i] = dic->rpages[i]; - continue; - } - - dic->tpages[i] = f2fs_compress_alloc_page(); - if (!dic->tpages[i]) { - ret = -ENOMEM; - goto out_end_io; - } - } - - if (cops->init_decompress_ctx) { - ret = cops->init_decompress_ctx(dic); - if (ret) - goto out_end_io; - } - - dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size); - if (!dic->rbuf) { - ret = -ENOMEM; - goto out_destroy_decompress_ctx; - } - - dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages); - if (!dic->cbuf) { - ret = -ENOMEM; - goto out_vunmap_rbuf; + ret = f2fs_prepare_decomp_mem(dic, false); + if (ret) { + bypass_callback = true; + goto out_release; } dic->clen = le32_to_cpu(dic->cbuf->clen); @@ -788,7 +762,7 @@ void f2fs_decompress_cluster(struct decompress_io_ctx *dic) if (dic->clen > PAGE_SIZE * dic->nr_cpages - COMPRESS_HEADER_SIZE) { ret = -EFSCORRUPTED; - goto out_vunmap_cbuf; + goto out_release; } ret = cops->decompress_pages(dic); @@ -809,17 +783,13 @@ void f2fs_decompress_cluster(struct decompress_io_ctx *dic) } } -out_vunmap_cbuf: - vm_unmap_ram(dic->cbuf, dic->nr_cpages); -out_vunmap_rbuf: - vm_unmap_ram(dic->rbuf, dic->cluster_size); -out_destroy_decompress_ctx: - if (cops->destroy_decompress_ctx) - cops->destroy_decompress_ctx(dic); +out_release: + f2fs_release_decomp_mem(dic, bypass_callback, false); + out_end_io: trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, dic->clen, ret); - f2fs_decompress_end_io(dic, ret); + f2fs_decompress_end_io(dic, ret, in_task); } /* @@ -829,7 +799,7 @@ out_end_io: * (or in the case of a failure, cleans up without actually decompressing). */ void f2fs_end_read_compressed_page(struct page *page, bool failed, - block_t blkaddr) + block_t blkaddr, bool in_task) { struct decompress_io_ctx *dic = (struct decompress_io_ctx *)page_private(page); @@ -839,12 +809,12 @@ void f2fs_end_read_compressed_page(struct page *page, bool failed, if (failed) WRITE_ONCE(dic->failed, true); - else if (blkaddr) + else if (blkaddr && in_task) f2fs_cache_compressed_page(sbi, page, dic->inode->i_ino, blkaddr); if (atomic_dec_and_test(&dic->remaining_pages)) - f2fs_decompress_cluster(dic); + f2fs_decompress_cluster(dic, in_task); } static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) @@ -871,19 +841,26 @@ bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) return is_page_in_cluster(cc, index); } -bool f2fs_all_cluster_page_loaded(struct compress_ctx *cc, struct pagevec *pvec, - int index, int nr_pages) +bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages, + int index, int nr_pages, bool uptodate) { - unsigned long pgidx; - int i; + unsigned long pgidx = pages[index]->index; + int i = uptodate ? 0 : 1; - if (nr_pages - index < cc->cluster_size) + /* + * when uptodate set to true, try to check all pages in cluster is + * uptodate or not. + */ + if (uptodate && (pgidx % cc->cluster_size)) return false; - pgidx = pvec->pages[index]->index; + if (nr_pages - index < cc->cluster_size) + return false; - for (i = 1; i < cc->cluster_size; i++) { - if (pvec->pages[index + i]->index != pgidx + i) + for (; i < cc->cluster_size; i++) { + if (pages[index + i]->index != pgidx + i) + return false; + if (uptodate && !PageUptodate(pages[index + i])) return false; } @@ -1552,16 +1529,85 @@ destroy_out: return err; } -static void f2fs_free_dic(struct decompress_io_ctx *dic); +static inline bool allow_memalloc_for_decomp(struct f2fs_sb_info *sbi, + bool pre_alloc) +{ + return pre_alloc ^ f2fs_low_mem_mode(sbi); +} + +static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, + bool pre_alloc) +{ + const struct f2fs_compress_ops *cops = + f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; + int i; + + if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) + return 0; + + dic->tpages = page_array_alloc(dic->inode, dic->cluster_size); + if (!dic->tpages) + return -ENOMEM; + + for (i = 0; i < dic->cluster_size; i++) { + if (dic->rpages[i]) { + dic->tpages[i] = dic->rpages[i]; + continue; + } + + dic->tpages[i] = f2fs_compress_alloc_page(); + if (!dic->tpages[i]) + return -ENOMEM; + } + + dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size); + if (!dic->rbuf) + return -ENOMEM; + + dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages); + if (!dic->cbuf) + return -ENOMEM; + + if (cops->init_decompress_ctx) { + int ret = cops->init_decompress_ctx(dic); + + if (ret) + return ret; + } + + return 0; +} + +static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, + bool bypass_destroy_callback, bool pre_alloc) +{ + const struct f2fs_compress_ops *cops = + f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; + + if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) + return; + + if (!bypass_destroy_callback && cops->destroy_decompress_ctx) + cops->destroy_decompress_ctx(dic); + + if (dic->cbuf) + vm_unmap_ram(dic->cbuf, dic->nr_cpages); + + if (dic->rbuf) + vm_unmap_ram(dic->rbuf, dic->cluster_size); +} + +static void f2fs_free_dic(struct decompress_io_ctx *dic, + bool bypass_destroy_callback); struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) { struct decompress_io_ctx *dic; pgoff_t start_idx = start_idx_of_cluster(cc); - int i; + struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); + int i, ret; - dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, - false, F2FS_I_SB(cc->inode)); + dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, false, sbi); if (!dic) return ERR_PTR(-ENOMEM); @@ -1587,32 +1633,43 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) dic->nr_rpages = cc->cluster_size; dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages); - if (!dic->cpages) + if (!dic->cpages) { + ret = -ENOMEM; goto out_free; + } for (i = 0; i < dic->nr_cpages; i++) { struct page *page; page = f2fs_compress_alloc_page(); - if (!page) + if (!page) { + ret = -ENOMEM; goto out_free; + } f2fs_set_compressed_page(page, cc->inode, start_idx + i + 1, dic); dic->cpages[i] = page; } + ret = f2fs_prepare_decomp_mem(dic, true); + if (ret) + goto out_free; + return dic; out_free: - f2fs_free_dic(dic); - return ERR_PTR(-ENOMEM); + f2fs_free_dic(dic, true); + return ERR_PTR(ret); } -static void f2fs_free_dic(struct decompress_io_ctx *dic) +static void f2fs_free_dic(struct decompress_io_ctx *dic, + bool bypass_destroy_callback) { int i; + f2fs_release_decomp_mem(dic, bypass_destroy_callback, true); + if (dic->tpages) { for (i = 0; i < dic->cluster_size; i++) { if (dic->rpages[i]) @@ -1637,17 +1694,33 @@ static void f2fs_free_dic(struct decompress_io_ctx *dic) kmem_cache_free(dic_entry_slab, dic); } -static void f2fs_put_dic(struct decompress_io_ctx *dic) +static void f2fs_late_free_dic(struct work_struct *work) { - if (refcount_dec_and_test(&dic->refcnt)) - f2fs_free_dic(dic); + struct decompress_io_ctx *dic = + container_of(work, struct decompress_io_ctx, free_work); + + f2fs_free_dic(dic, false); +} + +static void f2fs_put_dic(struct decompress_io_ctx *dic, bool in_task) +{ + if (refcount_dec_and_test(&dic->refcnt)) { + if (in_task) { + f2fs_free_dic(dic, false); + } else { + INIT_WORK(&dic->free_work, f2fs_late_free_dic); + queue_work(F2FS_I_SB(dic->inode)->post_read_wq, + &dic->free_work); + } + } } /* * Update and unlock the cluster's pagecache pages, and release the reference to * the decompress_io_ctx that was being held for I/O completion. */ -static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) +static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, + bool in_task) { int i; @@ -1668,7 +1741,7 @@ static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) unlock_page(rpage); } - f2fs_put_dic(dic); + f2fs_put_dic(dic, in_task); } static void f2fs_verify_cluster(struct work_struct *work) @@ -1685,14 +1758,15 @@ static void f2fs_verify_cluster(struct work_struct *work) SetPageError(rpage); } - __f2fs_decompress_end_io(dic, false); + __f2fs_decompress_end_io(dic, false, true); } /* * This is called when a compressed cluster has been decompressed * (or failed to be read and/or decompressed). */ -void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) +void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, + bool in_task) { if (!failed && dic->need_verity) { /* @@ -1704,7 +1778,7 @@ void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) INIT_WORK(&dic->verity_work, f2fs_verify_cluster); fsverity_enqueue_verify_work(&dic->verity_work); } else { - __f2fs_decompress_end_io(dic, failed); + __f2fs_decompress_end_io(dic, failed, in_task); } } @@ -1713,12 +1787,12 @@ void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) * * This is called when the page is no longer needed and can be freed. */ -void f2fs_put_page_dic(struct page *page) +void f2fs_put_page_dic(struct page *page, bool in_task) { struct decompress_io_ctx *dic = (struct decompress_io_ctx *)page_private(page); - f2fs_put_dic(dic); + f2fs_put_dic(dic, in_task); } /* @@ -1903,6 +1977,9 @@ int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) dev_t dev = sbi->sb->s_bdev->bd_dev; char slab_name[32]; + if (!f2fs_sb_has_compression(sbi)) + return 0; + sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); sbi->page_array_slab_size = sizeof(struct page *) << diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index ed503d50f95f..aa3ccddfa037 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -119,7 +119,7 @@ struct bio_post_read_ctx { block_t fs_blkaddr; }; -static void f2fs_finish_read_bio(struct bio *bio) +static void f2fs_finish_read_bio(struct bio *bio, bool in_task) { struct bio_vec *bv; struct bvec_iter_all iter_all; @@ -133,8 +133,9 @@ static void f2fs_finish_read_bio(struct bio *bio) if (f2fs_is_compressed_page(page)) { if (bio->bi_status) - f2fs_end_read_compressed_page(page, true, 0); - f2fs_put_page_dic(page); + f2fs_end_read_compressed_page(page, true, 0, + in_task); + f2fs_put_page_dic(page, in_task); continue; } @@ -191,7 +192,7 @@ static void f2fs_verify_bio(struct work_struct *work) fsverity_verify_bio(bio); } - f2fs_finish_read_bio(bio); + f2fs_finish_read_bio(bio, true); } /* @@ -203,7 +204,7 @@ static void f2fs_verify_bio(struct work_struct *work) * can involve reading verity metadata pages from the file, and these verity * metadata pages may be encrypted and/or compressed. */ -static void f2fs_verify_and_finish_bio(struct bio *bio) +static void f2fs_verify_and_finish_bio(struct bio *bio, bool in_task) { struct bio_post_read_ctx *ctx = bio->bi_private; @@ -211,7 +212,7 @@ static void f2fs_verify_and_finish_bio(struct bio *bio) INIT_WORK(&ctx->work, f2fs_verify_bio); fsverity_enqueue_verify_work(&ctx->work); } else { - f2fs_finish_read_bio(bio); + f2fs_finish_read_bio(bio, in_task); } } @@ -224,7 +225,8 @@ static void f2fs_verify_and_finish_bio(struct bio *bio) * that the bio includes at least one compressed page. The actual decompression * is done on a per-cluster basis, not a per-bio basis. */ -static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx) +static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx, + bool in_task) { struct bio_vec *bv; struct bvec_iter_all iter_all; @@ -237,7 +239,7 @@ static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx) /* PG_error was set if decryption failed. */ if (f2fs_is_compressed_page(page)) f2fs_end_read_compressed_page(page, PageError(page), - blkaddr); + blkaddr, in_task); else all_compressed = false; @@ -262,15 +264,16 @@ static void f2fs_post_read_work(struct work_struct *work) fscrypt_decrypt_bio(ctx->bio); if (ctx->enabled_steps & STEP_DECOMPRESS) - f2fs_handle_step_decompress(ctx); + f2fs_handle_step_decompress(ctx, true); - f2fs_verify_and_finish_bio(ctx->bio); + f2fs_verify_and_finish_bio(ctx->bio, true); } static void f2fs_read_end_io(struct bio *bio) { struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio)); struct bio_post_read_ctx *ctx; + bool intask = in_task(); iostat_update_and_unbind_ctx(bio, 0); ctx = bio->bi_private; @@ -281,16 +284,29 @@ static void f2fs_read_end_io(struct bio *bio) } if (bio->bi_status) { - f2fs_finish_read_bio(bio); + f2fs_finish_read_bio(bio, intask); return; } - if (ctx && (ctx->enabled_steps & (STEP_DECRYPT | STEP_DECOMPRESS))) { - INIT_WORK(&ctx->work, f2fs_post_read_work); - queue_work(ctx->sbi->post_read_wq, &ctx->work); - } else { - f2fs_verify_and_finish_bio(bio); + if (ctx) { + unsigned int enabled_steps = ctx->enabled_steps & + (STEP_DECRYPT | STEP_DECOMPRESS); + + /* + * If we have only decompression step between decompression and + * decrypt, we don't need post processing for this. + */ + if (enabled_steps == STEP_DECOMPRESS && + !f2fs_low_mem_mode(sbi)) { + f2fs_handle_step_decompress(ctx, intask); + } else if (enabled_steps) { + INIT_WORK(&ctx->work, f2fs_post_read_work); + queue_work(ctx->sbi->post_read_wq, &ctx->work); + return; + } } + + f2fs_verify_and_finish_bio(bio, intask); } static void f2fs_write_end_io(struct bio *bio) @@ -1682,8 +1698,6 @@ sync_out: */ f2fs_wait_on_block_writeback_range(inode, map->m_pblk, map->m_len); - invalidate_mapping_pages(META_MAPPING(sbi), - map->m_pblk, map->m_pblk); if (map->m_multidev_dio) { block_t blk_addr = map->m_pblk; @@ -2223,7 +2237,7 @@ skip_reading_dnode: if (f2fs_load_compressed_page(sbi, page, blkaddr)) { if (atomic_dec_and_test(&dic->remaining_pages)) - f2fs_decompress_cluster(dic); + f2fs_decompress_cluster(dic, true); continue; } @@ -2241,7 +2255,7 @@ submit_and_realloc: page->index, for_write); if (IS_ERR(bio)) { ret = PTR_ERR(bio); - f2fs_decompress_end_io(dic, ret); + f2fs_decompress_end_io(dic, ret, true); f2fs_put_dnode(&dn); *bio_ret = NULL; return ret; @@ -2731,6 +2745,7 @@ int f2fs_write_single_data_page(struct page *page, int *submitted, .submitted = false, .compr_blocks = compr_blocks, .need_lock = LOCK_RETRY, + .post_read = f2fs_post_read_required(inode), .io_type = io_type, .io_wbc = wbc, .bio = bio, @@ -2902,7 +2917,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping, { int ret = 0; int done = 0, retry = 0; - struct pagevec pvec; + struct page *pages[F2FS_ONSTACK_PAGES]; struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); struct bio *bio = NULL; sector_t last_block; @@ -2933,8 +2948,6 @@ static int f2fs_write_cache_pages(struct address_space *mapping, int submitted = 0; int i; - pagevec_init(&pvec); - if (get_dirty_pages(mapping->host) <= SM_I(F2FS_M_SB(mapping))->min_hot_blocks) set_inode_flag(mapping->host, FI_HOT_DATA); @@ -2960,13 +2973,13 @@ retry: tag_pages_for_writeback(mapping, index, end); done_index = index; while (!done && !retry && (index <= end)) { - nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag); + nr_pages = find_get_pages_range_tag(mapping, &index, end, + tag, F2FS_ONSTACK_PAGES, pages); if (nr_pages == 0) break; for (i = 0; i < nr_pages; i++) { - struct page *page = pvec.pages[i]; + struct page *page = pages[i]; bool need_readd; readd: need_readd = false; @@ -2997,6 +3010,10 @@ readd: if (!f2fs_cluster_is_empty(&cc)) goto lock_page; + if (f2fs_all_cluster_page_ready(&cc, + pages, i, nr_pages, true)) + goto lock_page; + ret2 = f2fs_prepare_compress_overwrite( inode, &pagep, page->index, &fsdata); @@ -3007,8 +3024,8 @@ readd: } else if (ret2 && (!f2fs_compress_write_end(inode, fsdata, page->index, 1) || - !f2fs_all_cluster_page_loaded(&cc, - &pvec, i, nr_pages))) { + !f2fs_all_cluster_page_ready(&cc, + pages, i, nr_pages, false))) { retry = 1; break; } @@ -3098,7 +3115,7 @@ next: if (need_readd) goto readd; } - pagevec_release(&pvec); + release_pages(pages, nr_pages); cond_resched(); } #ifdef CONFIG_F2FS_FS_COMPRESSION @@ -3408,12 +3425,11 @@ static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi, struct inode *cow_inode = F2FS_I(inode)->cow_inode; pgoff_t index = page->index; int err = 0; - block_t ori_blk_addr; + block_t ori_blk_addr = NULL_ADDR; /* If pos is beyond the end of file, reserve a new block in COW inode */ if ((pos & PAGE_MASK) >= i_size_read(inode)) - return __reserve_data_block(cow_inode, index, blk_addr, - node_changed); + goto reserve_block; /* Look for the block in COW inode first */ err = __find_data_block(cow_inode, index, blk_addr); @@ -3427,10 +3443,12 @@ static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi, if (err) return err; +reserve_block: /* Finally, we should reserve a new block in COW inode for the update */ err = __reserve_data_block(cow_inode, index, blk_addr, node_changed); if (err) return err; + inc_atomic_write_cnt(inode); if (ori_blk_addr != NULL_ADDR) *blk_addr = ori_blk_addr; diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c index c92625ef16d0..c01471573977 100644 --- a/fs/f2fs/debug.c +++ b/fs/f2fs/debug.c @@ -39,7 +39,7 @@ void f2fs_update_sit_info(struct f2fs_sb_info *sbi) bimodal = 0; total_vblocks = 0; - blks_per_sec = BLKS_PER_SEC(sbi); + blks_per_sec = CAP_BLKS_PER_SEC(sbi); hblks_per_sec = blks_per_sec / 2; for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { vblocks = get_valid_blocks(sbi, segno, true); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 85921a1f2db8..3c7cdb70fe2e 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -159,6 +159,7 @@ struct f2fs_mount_info { int fsync_mode; /* fsync policy */ int fs_mode; /* fs mode: LFS or ADAPTIVE */ int bggc_mode; /* bggc mode: off, on or sync */ + int memory_mode; /* memory mode */ int discard_unit; /* * discard command's offset/size should * be aligned to this unit: block, @@ -229,7 +230,6 @@ enum { #define CP_PAUSE 0x00000040 #define CP_RESIZE 0x00000080 -#define MAX_DISCARD_BLOCKS(sbi) BLKS_PER_SEC(sbi) #define DEF_MAX_DISCARD_REQUEST 8 /* issue 8 discards per round */ #define DEF_MIN_DISCARD_ISSUE_TIME 50 /* 50 ms, if exists */ #define DEF_MID_DISCARD_ISSUE_TIME 500 /* 500 ms, if device busy */ @@ -598,6 +598,8 @@ enum { #define RECOVERY_MAX_RA_BLOCKS BIO_MAX_VECS #define RECOVERY_MIN_RA_BLOCKS 1 +#define F2FS_ONSTACK_PAGES 16 /* nr of onstack pages */ + struct rb_entry { struct rb_node rb_node; /* rb node located in rb-tree */ union { @@ -757,6 +759,7 @@ enum { FI_ENABLE_COMPRESS, /* enable compression in "user" compression mode */ FI_COMPRESS_RELEASED, /* compressed blocks were released */ FI_ALIGNED_WRITE, /* enable aligned write */ + FI_COW_FILE, /* indicate COW file */ FI_MAX, /* max flag, never be used */ }; @@ -812,6 +815,8 @@ struct f2fs_inode_info { unsigned char i_compress_level; /* compress level (lz4hc,zstd) */ unsigned short i_compress_flag; /* compress flag */ unsigned int i_cluster_size; /* cluster size */ + + unsigned int atomic_write_cnt; }; static inline void get_extent_info(struct extent_info *ext, @@ -1198,6 +1203,7 @@ struct f2fs_io_info { bool retry; /* need to reallocate block address */ int compr_blocks; /* # of compressed block addresses */ bool encrypted; /* indicate file is encrypted */ + bool post_read; /* require post read */ enum iostat_type io_type; /* io type */ struct writeback_control *io_wbc; /* writeback control */ struct bio **bio; /* bio for ipu */ @@ -1234,7 +1240,6 @@ struct f2fs_dev_info { #ifdef CONFIG_BLK_DEV_ZONED unsigned int nr_blkz; /* Total number of zones */ unsigned long *blkz_seq; /* Bitmap indicating sequential zones */ - block_t *zone_capacity_blocks; /* Array of zone capacity in blks */ #endif }; @@ -1360,6 +1365,13 @@ enum { DISCARD_UNIT_SECTION, /* basic discard unit is section */ }; +enum { + MEMORY_MODE_NORMAL, /* memory mode for normal devices */ + MEMORY_MODE_LOW, /* memory mode for low memry devices */ +}; + + + static inline int f2fs_test_bit(unsigned int nr, char *addr); static inline void f2fs_set_bit(unsigned int nr, char *addr); static inline void f2fs_clear_bit(unsigned int nr, char *addr); @@ -1580,6 +1592,7 @@ struct decompress_io_ctx { void *private; /* payload buffer for specified decompression algorithm */ void *private2; /* extra payload buffer */ struct work_struct verity_work; /* work to verify the decompressed pages */ + struct work_struct free_work; /* work for late free this structure itself */ }; #define NULL_CLUSTER ((unsigned int)(~0)) @@ -1664,6 +1677,7 @@ struct f2fs_sb_info { unsigned int meta_ino_num; /* meta inode number*/ unsigned int log_blocks_per_seg; /* log2 blocks per segment */ unsigned int blocks_per_seg; /* blocks per segment */ + unsigned int unusable_blocks_per_sec; /* unusable blocks per section */ unsigned int segs_per_sec; /* segments per section */ unsigned int secs_per_zone; /* sections per zone */ unsigned int total_sections; /* total section count */ @@ -1804,6 +1818,12 @@ struct f2fs_sb_info { int max_fragment_chunk; /* max chunk size for block fragmentation mode */ int max_fragment_hole; /* max hole size for block fragmentation mode */ + /* For atomic write statistics */ + atomic64_t current_atomic_write; + s64 peak_atomic_write; + u64 committed_atomic_block; + u64 revoked_atomic_block; + #ifdef CONFIG_F2FS_FS_COMPRESSION struct kmem_cache *page_array_slab; /* page array entry */ unsigned int page_array_slab_size; /* default page array slab size */ @@ -2418,6 +2438,28 @@ static inline void inode_dec_dirty_pages(struct inode *inode) dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_QDATA); } +static inline void inc_atomic_write_cnt(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + u64 current_write; + + fi->atomic_write_cnt++; + atomic64_inc(&sbi->current_atomic_write); + current_write = atomic64_read(&sbi->current_atomic_write); + if (current_write > sbi->peak_atomic_write) + sbi->peak_atomic_write = current_write; +} + +static inline void release_atomic_write_cnt(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + + atomic64_sub(fi->atomic_write_cnt, &sbi->current_atomic_write); + fi->atomic_write_cnt = 0; +} + static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type) { return atomic_read(&sbi->nr_pages[count_type]); @@ -2696,16 +2738,6 @@ static inline struct page *f2fs_pagecache_get_page( return pagecache_get_page(mapping, index, fgp_flags, gfp_mask); } -static inline void f2fs_copy_page(struct page *src, struct page *dst) -{ - char *src_kaddr = kmap(src); - char *dst_kaddr = kmap(dst); - - memcpy(dst_kaddr, src_kaddr, PAGE_SIZE); - kunmap(dst); - kunmap(src); -} - static inline void f2fs_put_page(struct page *page, int unlock) { if (!page) @@ -3208,6 +3240,11 @@ static inline bool f2fs_is_atomic_file(struct inode *inode) return is_inode_flag_set(inode, FI_ATOMIC_FILE); } +static inline bool f2fs_is_cow_file(struct inode *inode) +{ + return is_inode_flag_set(inode, FI_COW_FILE); +} + static inline bool f2fs_is_first_block_written(struct inode *inode) { return is_inode_flag_set(inode, FI_FIRST_BLOCK_WRITTEN); @@ -4154,13 +4191,13 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page); bool f2fs_is_compress_backend_ready(struct inode *inode); int f2fs_init_compress_mempool(void); void f2fs_destroy_compress_mempool(void); -void f2fs_decompress_cluster(struct decompress_io_ctx *dic); +void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task); void f2fs_end_read_compressed_page(struct page *page, bool failed, - block_t blkaddr); + block_t blkaddr, bool in_task); bool f2fs_cluster_is_empty(struct compress_ctx *cc); bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index); -bool f2fs_all_cluster_page_loaded(struct compress_ctx *cc, struct pagevec *pvec, - int index, int nr_pages); +bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages, + int index, int nr_pages, bool uptodate); bool f2fs_sanity_check_cluster(struct dnode_of_data *dn); void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page); int f2fs_write_multi_pages(struct compress_ctx *cc, @@ -4175,8 +4212,9 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, unsigned nr_pages, sector_t *last_block_in_bio, bool is_readahead, bool for_write); struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc); -void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed); -void f2fs_put_page_dic(struct page *page); +void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, + bool in_task); +void f2fs_put_page_dic(struct page *page, bool in_task); unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn); int f2fs_init_compress_ctx(struct compress_ctx *cc); void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse); @@ -4222,13 +4260,14 @@ static inline struct page *f2fs_compress_control_page(struct page *page) } static inline int f2fs_init_compress_mempool(void) { return 0; } static inline void f2fs_destroy_compress_mempool(void) { } -static inline void f2fs_decompress_cluster(struct decompress_io_ctx *dic) { } +static inline void f2fs_decompress_cluster(struct decompress_io_ctx *dic, + bool in_task) { } static inline void f2fs_end_read_compressed_page(struct page *page, - bool failed, block_t blkaddr) + bool failed, block_t blkaddr, bool in_task) { WARN_ON_ONCE(1); } -static inline void f2fs_put_page_dic(struct page *page) +static inline void f2fs_put_page_dic(struct page *page, bool in_task) { WARN_ON_ONCE(1); } @@ -4254,8 +4293,9 @@ static inline void f2fs_update_extent_tree_range_compressed(struct inode *inode, unsigned int c_len) { } #endif -static inline void set_compress_context(struct inode *inode) +static inline int set_compress_context(struct inode *inode) { +#ifdef CONFIG_F2FS_FS_COMPRESSION struct f2fs_sb_info *sbi = F2FS_I_SB(inode); F2FS_I(inode)->i_compress_algorithm = @@ -4278,6 +4318,10 @@ static inline void set_compress_context(struct inode *inode) stat_inc_compr_inode(inode); inc_compr_inode_stat(inode); f2fs_mark_inode_dirty_sync(inode, true); + return 0; +#else + return -EOPNOTSUPP; +#endif } static inline bool f2fs_disable_compressed_file(struct inode *inode) @@ -4394,10 +4438,15 @@ static inline bool f2fs_lfs_mode(struct f2fs_sb_info *sbi) return F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS; } +static inline bool f2fs_low_mem_mode(struct f2fs_sb_info *sbi) +{ + return F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW; +} + static inline bool f2fs_may_compress(struct inode *inode) { if (IS_SWAPFILE(inode) || f2fs_is_pinned_file(inode) || - f2fs_is_atomic_file(inode)) + f2fs_is_atomic_file(inode) || f2fs_has_inline_data(inode)) return false; return S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode); } @@ -4459,12 +4508,7 @@ static inline bool f2fs_force_buffered_io(struct inode *inode, /* disallow direct IO if any of devices has unaligned blksize */ if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize) return true; - /* - * for blkzoned device, fallback direct IO to buffered IO, so - * all IOs can be serialized by log-structured write. - */ - if (f2fs_sb_has_blkzoned(sbi)) - return true; + if (f2fs_lfs_mode(sbi) && (rw == WRITE)) { if (block_unaligned_IO(inode, iocb, iter)) return true; diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index d66e37d80a2d..ce4905a073b3 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1272,7 +1272,7 @@ static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode, f2fs_put_page(psrc, 1); return PTR_ERR(pdst); } - f2fs_copy_page(psrc, pdst); + memcpy_page(pdst, 0, psrc, 0, PAGE_SIZE); set_page_dirty(pdst); f2fs_put_page(pdst, 1); f2fs_put_page(psrc, 1); @@ -1675,7 +1675,7 @@ static int expand_inode_data(struct inode *inode, loff_t offset, return 0; if (f2fs_is_pinned_file(inode)) { - block_t sec_blks = BLKS_PER_SEC(sbi); + block_t sec_blks = CAP_BLKS_PER_SEC(sbi); block_t sec_len = roundup(map.m_len, sec_blks); map.m_len = sec_blks; @@ -1816,8 +1816,7 @@ static int f2fs_release_file(struct inode *inode, struct file *filp) atomic_read(&inode->i_writecount) != 1) return 0; - if (f2fs_is_atomic_file(inode)) - f2fs_abort_atomic_write(inode, true); + f2fs_abort_atomic_write(inode, true); return 0; } @@ -1831,8 +1830,7 @@ static int f2fs_file_flush(struct file *file, fl_owner_t id) * until all the writers close its file. Since this should be done * before dropping file lock, it needs to do in ->flush. */ - if (f2fs_is_atomic_file(inode) && - F2FS_I(inode)->atomic_write_task == current) + if (F2FS_I(inode)->atomic_write_task == current) f2fs_abort_atomic_write(inode, true); return 0; } @@ -1867,22 +1865,15 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask) if (masked_flags & F2FS_COMPR_FL) { if (!f2fs_disable_compressed_file(inode)) return -EINVAL; - } - if (iflags & F2FS_NOCOMP_FL) - return -EINVAL; - if (iflags & F2FS_COMPR_FL) { + } else { if (!f2fs_may_compress(inode)) return -EINVAL; - if (S_ISREG(inode->i_mode) && inode->i_size) + if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode)) return -EINVAL; - - set_compress_context(inode); + if (set_compress_context(inode)) + return -EOPNOTSUPP; } } - if ((iflags ^ masked_flags) & F2FS_NOCOMP_FL) { - if (masked_flags & F2FS_COMPR_FL) - return -EINVAL; - } fi->i_flags = iflags | (fi->i_flags & ~mask); f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) && @@ -2062,13 +2053,14 @@ static int f2fs_ioc_start_atomic_write(struct file *filp) spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); set_inode_flag(inode, FI_ATOMIC_FILE); - set_inode_flag(fi->cow_inode, FI_ATOMIC_FILE); + set_inode_flag(fi->cow_inode, FI_COW_FILE); clear_inode_flag(fi->cow_inode, FI_INLINE_DATA); f2fs_up_write(&fi->i_gc_rwsem[WRITE]); f2fs_update_time(sbi, REQ_TIME); fi->atomic_write_task = current; stat_update_max_atomic_write(inode); + fi->atomic_write_cnt = 0; out: inode_unlock(inode); mnt_drop_write_file(filp); @@ -2109,6 +2101,30 @@ unlock_out: return ret; } +static int f2fs_ioc_abort_atomic_write(struct file *filp) +{ + struct inode *inode = file_inode(filp); + struct user_namespace *mnt_userns = file_mnt_user_ns(filp); + int ret; + + if (!inode_owner_or_capable(mnt_userns, inode)) + return -EACCES; + + ret = mnt_want_write_file(filp); + if (ret) + return ret; + + inode_lock(inode); + + f2fs_abort_atomic_write(inode, true); + + inode_unlock(inode); + + mnt_drop_write_file(filp); + f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); + return ret; +} + static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) { struct inode *inode = file_inode(filp); @@ -2426,7 +2442,7 @@ do_more: ret = -EAGAIN; goto out; } - range->start += BLKS_PER_SEC(sbi); + range->start += CAP_BLKS_PER_SEC(sbi); if (range->start <= end) goto do_more; out: @@ -2551,7 +2567,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, goto out; } - sec_num = DIV_ROUND_UP(total, BLKS_PER_SEC(sbi)); + sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi)); /* * make sure there are enough free section for LFS allocation, this can @@ -3897,10 +3913,10 @@ static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len) for (i = 0; i < page_len; i++, redirty_idx++) { page = find_lock_page(mapping, redirty_idx); - if (!page) { - ret = -ENOMEM; - break; - } + + /* It will never fail, when page has pinned above */ + f2fs_bug_on(F2FS_I_SB(inode), !page); + set_page_dirty(page); f2fs_put_page(page, 1); f2fs_put_page(page, 0); @@ -3939,6 +3955,11 @@ static int f2fs_ioc_decompress_file(struct file *filp, unsigned long arg) goto out; } + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + ret = -EINVAL; + goto out; + } + ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); if (ret) goto out; @@ -4006,6 +4027,11 @@ static int f2fs_ioc_compress_file(struct file *filp, unsigned long arg) goto out; } + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + ret = -EINVAL; + goto out; + } + ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); if (ret) goto out; @@ -4054,9 +4080,10 @@ static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return f2fs_ioc_start_atomic_write(filp); case F2FS_IOC_COMMIT_ATOMIC_WRITE: return f2fs_ioc_commit_atomic_write(filp); + case F2FS_IOC_ABORT_ATOMIC_WRITE: + return f2fs_ioc_abort_atomic_write(filp); case F2FS_IOC_START_VOLATILE_WRITE: case F2FS_IOC_RELEASE_VOLATILE_WRITE: - case F2FS_IOC_ABORT_VOLATILE_WRITE: return -EOPNOTSUPP; case F2FS_IOC_SHUTDOWN: return f2fs_ioc_shutdown(filp, arg); @@ -4725,7 +4752,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case F2FS_IOC_COMMIT_ATOMIC_WRITE: case F2FS_IOC_START_VOLATILE_WRITE: case F2FS_IOC_RELEASE_VOLATILE_WRITE: - case F2FS_IOC_ABORT_VOLATILE_WRITE: + case F2FS_IOC_ABORT_ATOMIC_WRITE: case F2FS_IOC_SHUTDOWN: case FITRIM: case FS_IOC_SET_ENCRYPTION_POLICY: diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index d5fb426e0747..6da21d405ce1 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -150,8 +150,11 @@ do_gc: gc_control.nr_free_secs = foreground ? 1 : 0; /* if return value is not zero, no victim was selected */ - if (f2fs_gc(sbi, &gc_control)) - wait_ms = gc_th->no_gc_sleep_time; + if (f2fs_gc(sbi, &gc_control)) { + /* don't bother wait_ms by foreground gc */ + if (!foreground) + wait_ms = gc_th->no_gc_sleep_time; + } if (foreground) wake_up_all(&gc_th->fggc_wq); @@ -487,7 +490,7 @@ static void atgc_lookup_victim(struct f2fs_sb_info *sbi, unsigned long long age, u, accu; unsigned long long max_mtime = sit_i->dirty_max_mtime; unsigned long long min_mtime = sit_i->dirty_min_mtime; - unsigned int sec_blocks = BLKS_PER_SEC(sbi); + unsigned int sec_blocks = CAP_BLKS_PER_SEC(sbi); unsigned int vblocks; unsigned int dirty_threshold = max(am->max_candidate_count, am->candidate_ratio * @@ -1487,7 +1490,7 @@ next_step: */ if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) || (!force_migrate && get_valid_blocks(sbi, segno, true) == - BLKS_PER_SEC(sbi))) + CAP_BLKS_PER_SEC(sbi))) return submitted; if (check_valid_map(sbi, segno, off) == 0) diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index 3fe145e8e594..19b956c2d697 100644 --- a/fs/f2fs/gc.h +++ b/fs/f2fs/gc.h @@ -120,15 +120,13 @@ static inline block_t free_user_blocks(struct f2fs_sb_info *sbi) return free_blks - ovp_blks; } -static inline block_t limit_invalid_user_blocks(struct f2fs_sb_info *sbi) +static inline block_t limit_invalid_user_blocks(block_t user_block_count) { - return (long)(sbi->user_block_count * LIMIT_INVALID_BLOCK) / 100; + return (long)(user_block_count * LIMIT_INVALID_BLOCK) / 100; } -static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi) +static inline block_t limit_free_user_blocks(block_t reclaimable_user_blocks) { - block_t reclaimable_user_blocks = sbi->user_block_count - - written_block_count(sbi); return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100; } @@ -163,15 +161,16 @@ static inline void decrease_sleep_time(struct f2fs_gc_kthread *gc_th, static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi) { - block_t invalid_user_blocks = sbi->user_block_count - - written_block_count(sbi); + block_t user_block_count = sbi->user_block_count; + block_t invalid_user_blocks = user_block_count - + written_block_count(sbi); /* * Background GC is triggered with the following conditions. * 1. There are a number of invalid blocks. * 2. There is not enough free space. */ - if (invalid_user_blocks > limit_invalid_user_blocks(sbi) && - free_user_blocks(sbi) < limit_free_user_blocks(sbi)) - return true; - return false; + return (invalid_user_blocks > + limit_invalid_user_blocks(user_block_count) && + free_user_blocks(sbi) < + limit_free_user_blocks(invalid_user_blocks)); } diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index fc55f5bd1fcc..6d11c365d7b4 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -744,8 +744,7 @@ void f2fs_evict_inode(struct inode *inode) nid_t xnid = F2FS_I(inode)->i_xattr_nid; int err = 0; - if (f2fs_is_atomic_file(inode)) - f2fs_abort_atomic_write(inode, true); + f2fs_abort_atomic_write(inode, true); trace_f2fs_evict_inode(inode); truncate_inode_pages_final(&inode->i_data); diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 740c72d088f3..e06a0c478b39 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1292,7 +1292,11 @@ struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs) dec_valid_node_count(sbi, dn->inode, !ofs); goto fail; } - f2fs_bug_on(sbi, new_ni.blk_addr != NULL_ADDR); + if (unlikely(new_ni.blk_addr != NULL_ADDR)) { + err = -EFSCORRUPTED; + set_sbi_flag(sbi, SBI_NEED_FSCK); + goto fail; + } #endif new_ni.nid = dn->nid; new_ni.ino = dn->inode->i_ino; @@ -1945,7 +1949,6 @@ next_step: for (i = 0; i < nr_pages; i++) { struct page *page = pvec.pages[i]; bool submitted = false; - bool may_dirty = true; /* give a priority to WB_SYNC threads */ if (atomic_read(&sbi->wb_sync_req[NODE]) && @@ -1998,11 +2001,8 @@ continue_unlock: } /* flush dirty inode */ - if (IS_INODE(page) && may_dirty) { - may_dirty = false; - if (flush_dirty_inode(page)) - goto lock_node; - } + if (IS_INODE(page) && flush_dirty_inode(page)) + goto lock_node; write_node: f2fs_wait_on_page_writeback(page, NODE, true, true); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index c7afc588cf26..0de21f82d7bc 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -190,18 +190,20 @@ void f2fs_abort_atomic_write(struct inode *inode, bool clean) struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct f2fs_inode_info *fi = F2FS_I(inode); - if (f2fs_is_atomic_file(inode)) { - if (clean) - truncate_inode_pages_final(inode->i_mapping); - clear_inode_flag(fi->cow_inode, FI_ATOMIC_FILE); - iput(fi->cow_inode); - fi->cow_inode = NULL; - clear_inode_flag(inode, FI_ATOMIC_FILE); + if (!f2fs_is_atomic_file(inode)) + return; - spin_lock(&sbi->inode_lock[ATOMIC_FILE]); - sbi->atomic_files--; - spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); - } + if (clean) + truncate_inode_pages_final(inode->i_mapping); + clear_inode_flag(fi->cow_inode, FI_COW_FILE); + iput(fi->cow_inode); + fi->cow_inode = NULL; + release_atomic_write_cnt(inode); + clear_inode_flag(inode, FI_ATOMIC_FILE); + + spin_lock(&sbi->inode_lock[ATOMIC_FILE]); + sbi->atomic_files--; + spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); } static int __replace_atomic_write_block(struct inode *inode, pgoff_t index, @@ -335,6 +337,11 @@ next: } out: + if (ret) + sbi->revoked_atomic_block += fi->atomic_write_cnt; + else + sbi->committed_atomic_block += fi->atomic_write_cnt; + __complete_revoke_list(inode, &revoke_list, ret ? true : false); return ret; @@ -728,7 +735,7 @@ static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, get_valid_blocks(sbi, segno, true); f2fs_bug_on(sbi, unlikely(!valid_blocks || - valid_blocks == BLKS_PER_SEC(sbi))); + valid_blocks == CAP_BLKS_PER_SEC(sbi))); if (!IS_CURSEC(sbi, secno)) set_bit(secno, dirty_i->dirty_secmap); @@ -764,7 +771,7 @@ static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); if (!valid_blocks || - valid_blocks == BLKS_PER_SEC(sbi)) { + valid_blocks == CAP_BLKS_PER_SEC(sbi)) { clear_bit(secno, dirty_i->dirty_secmap); return; } @@ -3166,7 +3173,7 @@ static int __get_segment_type_6(struct f2fs_io_info *fio) return CURSEG_COLD_DATA; if (file_is_hot(inode) || is_inode_flag_set(inode, FI_HOT_DATA) || - f2fs_is_atomic_file(inode)) + f2fs_is_cow_file(inode)) return CURSEG_HOT_DATA; return f2fs_rw_hint_to_seg_type(inode->i_write_hint); } else { @@ -3433,7 +3440,8 @@ int f2fs_inplace_write_data(struct f2fs_io_info *fio) goto drop_bio; } - invalidate_mapping_pages(META_MAPPING(sbi), + if (fio->post_read) + invalidate_mapping_pages(META_MAPPING(sbi), fio->new_blkaddr, fio->new_blkaddr); stat_inc_inplace_blocks(fio->sbi); @@ -3616,10 +3624,16 @@ void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr) void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr, block_t len) { + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); block_t i; + if (!f2fs_post_read_required(inode)) + return; + for (i = 0; i < len; i++) f2fs_wait_on_block_writeback(inode, blkaddr + i); + + invalidate_mapping_pages(META_MAPPING(sbi), blkaddr, blkaddr + len - 1); } static int read_compacted_summaries(struct f2fs_sb_info *sbi) @@ -4362,6 +4376,12 @@ static int build_sit_entries(struct f2fs_sb_info *sbi) return err; seg_info_from_raw_sit(se, &sit); + if (se->type >= NR_PERSISTENT_LOG) { + f2fs_err(sbi, "Invalid segment type: %u, segno: %u", + se->type, start); + return -EFSCORRUPTED; + } + sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks; if (f2fs_block_unit_discard(sbi)) { @@ -4410,6 +4430,13 @@ static int build_sit_entries(struct f2fs_sb_info *sbi) break; seg_info_from_raw_sit(se, &sit); + if (se->type >= NR_PERSISTENT_LOG) { + f2fs_err(sbi, "Invalid segment type: %u, segno: %u", + se->type, start); + err = -EFSCORRUPTED; + break; + } + sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks; if (f2fs_block_unit_discard(sbi)) { @@ -4483,7 +4510,6 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi) struct free_segmap_info *free_i = FREE_I(sbi); unsigned int segno = 0, offset = 0, secno; block_t valid_blocks, usable_blks_in_seg; - block_t blks_per_sec = BLKS_PER_SEC(sbi); while (1) { /* find dirty segment based on free segmap */ @@ -4512,7 +4538,7 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi) valid_blocks = get_valid_blocks(sbi, segno, true); secno = GET_SEC_FROM_SEG(sbi, segno); - if (!valid_blocks || valid_blocks == blks_per_sec) + if (!valid_blocks || valid_blocks == CAP_BLKS_PER_SEC(sbi)) continue; if (IS_CURSEC(sbi, secno)) continue; @@ -4895,7 +4921,7 @@ static unsigned int get_zone_idx(struct f2fs_sb_info *sbi, unsigned int secno, static inline unsigned int f2fs_usable_zone_segs_in_sec( struct f2fs_sb_info *sbi, unsigned int segno) { - unsigned int dev_idx, zone_idx, unusable_segs_in_sec; + unsigned int dev_idx, zone_idx; dev_idx = f2fs_target_device_index(sbi, START_BLOCK(sbi, segno)); zone_idx = get_zone_idx(sbi, GET_SEC_FROM_SEG(sbi, segno), dev_idx); @@ -4904,18 +4930,12 @@ static inline unsigned int f2fs_usable_zone_segs_in_sec( if (is_conv_zone(sbi, zone_idx, dev_idx)) return sbi->segs_per_sec; - /* - * If the zone_capacity_blocks array is NULL, then zone capacity - * is equal to the zone size for all zones - */ - if (!FDEV(dev_idx).zone_capacity_blocks) + if (!sbi->unusable_blocks_per_sec) return sbi->segs_per_sec; /* Get the segment count beyond zone capacity block */ - unusable_segs_in_sec = (sbi->blocks_per_blkz - - FDEV(dev_idx).zone_capacity_blocks[zone_idx]) >> - sbi->log_blocks_per_seg; - return sbi->segs_per_sec - unusable_segs_in_sec; + return sbi->segs_per_sec - (sbi->unusable_blocks_per_sec >> + sbi->log_blocks_per_seg); } /* @@ -4944,12 +4964,11 @@ static inline unsigned int f2fs_usable_zone_blks_in_seg( if (is_conv_zone(sbi, zone_idx, dev_idx)) return sbi->blocks_per_seg; - if (!FDEV(dev_idx).zone_capacity_blocks) + if (!sbi->unusable_blocks_per_sec) return sbi->blocks_per_seg; sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno)); - sec_cap_blkaddr = sec_start_blkaddr + - FDEV(dev_idx).zone_capacity_blocks[zone_idx]; + sec_cap_blkaddr = sec_start_blkaddr + CAP_BLKS_PER_SEC(sbi); /* * If segment starts before zone capacity and spans beyond diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 3f277dfcb131..d1d63766f2c7 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -101,6 +101,9 @@ static inline void sanity_check_seg_type(struct f2fs_sb_info *sbi, GET_SEGNO_FROM_SEG0(sbi, blk_addr))) #define BLKS_PER_SEC(sbi) \ ((sbi)->segs_per_sec * (sbi)->blocks_per_seg) +#define CAP_BLKS_PER_SEC(sbi) \ + ((sbi)->segs_per_sec * (sbi)->blocks_per_seg - \ + (sbi)->unusable_blocks_per_sec) #define GET_SEC_FROM_SEG(sbi, segno) \ (((segno) == -1) ? -1: (segno) / (sbi)->segs_per_sec) #define GET_SEG_FROM_SEC(sbi, secno) \ @@ -609,10 +612,10 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, get_pages(sbi, F2FS_DIRTY_DENTS) + get_pages(sbi, F2FS_DIRTY_IMETA); unsigned int total_dent_blocks = get_pages(sbi, F2FS_DIRTY_DENTS); - unsigned int node_secs = total_node_blocks / BLKS_PER_SEC(sbi); - unsigned int dent_secs = total_dent_blocks / BLKS_PER_SEC(sbi); - unsigned int node_blocks = total_node_blocks % BLKS_PER_SEC(sbi); - unsigned int dent_blocks = total_dent_blocks % BLKS_PER_SEC(sbi); + unsigned int node_secs = total_node_blocks / CAP_BLKS_PER_SEC(sbi); + unsigned int dent_secs = total_dent_blocks / CAP_BLKS_PER_SEC(sbi); + unsigned int node_blocks = total_node_blocks % CAP_BLKS_PER_SEC(sbi); + unsigned int dent_blocks = total_dent_blocks % CAP_BLKS_PER_SEC(sbi); unsigned int free, need_lower, need_upper; if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index bce02306f7a0..2451623c05a7 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -8,6 +8,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/fs.h> +#include <linux/fs_context.h> #include <linux/sched/mm.h> #include <linux/statfs.h> #include <linux/buffer_head.h> @@ -159,6 +160,7 @@ enum { Opt_gc_merge, Opt_nogc_merge, Opt_discard_unit, + Opt_memory_mode, Opt_err, }; @@ -235,6 +237,7 @@ static match_table_t f2fs_tokens = { {Opt_gc_merge, "gc_merge"}, {Opt_nogc_merge, "nogc_merge"}, {Opt_discard_unit, "discard_unit=%s"}, + {Opt_memory_mode, "memory=%s"}, {Opt_err, NULL}, }; @@ -492,9 +495,19 @@ static int f2fs_set_test_dummy_encryption(struct super_block *sb, bool is_remount) { struct f2fs_sb_info *sbi = F2FS_SB(sb); -#ifdef CONFIG_FS_ENCRYPTION + struct fs_parameter param = { + .type = fs_value_is_string, + .string = arg->from ? arg->from : "", + }; + struct fscrypt_dummy_policy *policy = + &F2FS_OPTION(sbi).dummy_enc_policy; int err; + if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { + f2fs_warn(sbi, "test_dummy_encryption option not supported"); + return -EINVAL; + } + if (!f2fs_sb_has_encrypt(sbi)) { f2fs_err(sbi, "Encrypt feature is off"); return -EINVAL; @@ -506,12 +519,12 @@ static int f2fs_set_test_dummy_encryption(struct super_block *sb, * needed to allow it to be set or changed during remount. We do allow * it to be specified during remount, but only if there is no change. */ - if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) { + if (is_remount && !fscrypt_is_dummy_policy_set(policy)) { f2fs_warn(sbi, "Can't set test_dummy_encryption on remount"); return -EINVAL; } - err = fscrypt_set_test_dummy_encryption( - sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy); + + err = fscrypt_parse_test_dummy_encryption(¶m, policy); if (err) { if (err == -EEXIST) f2fs_warn(sbi, @@ -524,12 +537,14 @@ static int f2fs_set_test_dummy_encryption(struct super_block *sb, opt, err); return -EINVAL; } + err = fscrypt_add_test_dummy_key(sb, policy); + if (err) { + f2fs_warn(sbi, "Error adding test dummy encryption key [%d]", + err); + return err; + } f2fs_warn(sbi, "Test dummy encryption mode enabled"); return 0; -#else - f2fs_warn(sbi, "test_dummy_encryption option not supported"); - return -EINVAL; -#endif } #ifdef CONFIG_F2FS_FS_COMPRESSION @@ -1222,6 +1237,22 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) } kfree(name); break; + case Opt_memory_mode: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "normal")) { + F2FS_OPTION(sbi).memory_mode = + MEMORY_MODE_NORMAL; + } else if (!strcmp(name, "low")) { + F2FS_OPTION(sbi).memory_mode = + MEMORY_MODE_LOW; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; default: f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value", p); @@ -1380,8 +1411,7 @@ static int f2fs_drop_inode(struct inode *inode) atomic_inc(&inode->i_count); spin_unlock(&inode->i_lock); - if (f2fs_is_atomic_file(inode)) - f2fs_abort_atomic_write(inode, true); + f2fs_abort_atomic_write(inode, true); /* should remain fi->extent_tree for writepage */ f2fs_destroy_extent_node(inode); @@ -1491,7 +1521,6 @@ static void destroy_device_list(struct f2fs_sb_info *sbi) blkdev_put(FDEV(i).bdev, FMODE_EXCL); #ifdef CONFIG_BLK_DEV_ZONED kvfree(FDEV(i).blkz_seq); - kfree(FDEV(i).zone_capacity_blocks); #endif } kvfree(sbi->devs); @@ -1993,6 +2022,11 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION) seq_printf(seq, ",discard_unit=%s", "section"); + if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL) + seq_printf(seq, ",memory=%s", "normal"); + else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW) + seq_printf(seq, ",memory=%s", "low"); + return 0; } @@ -2014,6 +2048,7 @@ static void default_options(struct f2fs_sb_info *sbi) F2FS_OPTION(sbi).compress_ext_cnt = 0; F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; + F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL; sbi->sb->s_flags &= ~SB_INLINECRYPT; @@ -3579,6 +3614,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi) sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE; sbi->max_fragment_hole = DEF_FRAGMENT_SIZE; spin_lock_init(&sbi->gc_urgent_high_lock); + atomic64_set(&sbi->current_atomic_write, 0); sbi->dir_level = DEF_DIR_LEVEL; sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL; @@ -3636,24 +3672,29 @@ err_valid_block: #ifdef CONFIG_BLK_DEV_ZONED struct f2fs_report_zones_args { + struct f2fs_sb_info *sbi; struct f2fs_dev_info *dev; - bool zone_cap_mismatch; }; static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx, void *data) { struct f2fs_report_zones_args *rz_args = data; + block_t unusable_blocks = (zone->len - zone->capacity) >> + F2FS_LOG_SECTORS_PER_BLOCK; if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) return 0; set_bit(idx, rz_args->dev->blkz_seq); - rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >> - F2FS_LOG_SECTORS_PER_BLOCK; - if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch) - rz_args->zone_cap_mismatch = true; - + if (!rz_args->sbi->unusable_blocks_per_sec) { + rz_args->sbi->unusable_blocks_per_sec = unusable_blocks; + return 0; + } + if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) { + f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n"); + return -EINVAL; + } return 0; } @@ -3694,26 +3735,13 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi) if (!FDEV(devi).blkz_seq) return -ENOMEM; - /* Get block zones type and zone-capacity */ - FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi, - FDEV(devi).nr_blkz * sizeof(block_t), - GFP_KERNEL); - if (!FDEV(devi).zone_capacity_blocks) - return -ENOMEM; - + rep_zone_arg.sbi = sbi; rep_zone_arg.dev = &FDEV(devi); - rep_zone_arg.zone_cap_mismatch = false; ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb, &rep_zone_arg); if (ret < 0) return ret; - - if (!rep_zone_arg.zone_cap_mismatch) { - kfree(FDEV(devi).zone_capacity_blocks); - FDEV(devi).zone_capacity_blocks = NULL; - } - return 0; } #endif diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 4c50aedd5144..eba5fb1629d7 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -339,6 +339,21 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a, sbi->gc_reclaimed_segs[sbi->gc_segment_mode]); } + if (!strcmp(a->attr.name, "current_atomic_write")) { + s64 current_write = atomic64_read(&sbi->current_atomic_write); + + return sysfs_emit(buf, "%lld\n", current_write); + } + + if (!strcmp(a->attr.name, "peak_atomic_write")) + return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write); + + if (!strcmp(a->attr.name, "committed_atomic_block")) + return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block); + + if (!strcmp(a->attr.name, "revoked_atomic_block")) + return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block); + ui = (unsigned int *)(ptr + a->offset); return sprintf(buf, "%u\n", *ui); @@ -608,6 +623,27 @@ out: return count; } + if (!strcmp(a->attr.name, "peak_atomic_write")) { + if (t != 0) + return -EINVAL; + sbi->peak_atomic_write = 0; + return count; + } + + if (!strcmp(a->attr.name, "committed_atomic_block")) { + if (t != 0) + return -EINVAL; + sbi->committed_atomic_block = 0; + return count; + } + + if (!strcmp(a->attr.name, "revoked_atomic_block")) { + if (t != 0) + return -EINVAL; + sbi->revoked_atomic_block = 0; + return count; + } + *ui = (unsigned int)t; return count; @@ -713,6 +749,11 @@ static struct f2fs_attr f2fs_attr_##_name = { \ .offset = _offset \ } +#define F2FS_RO_ATTR(struct_type, struct_name, name, elname) \ + F2FS_ATTR_OFFSET(struct_type, name, 0444, \ + f2fs_sbi_show, NULL, \ + offsetof(struct struct_name, elname)) + #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ F2FS_ATTR_OFFSET(struct_type, name, 0644, \ f2fs_sbi_show, f2fs_sbi_store, \ @@ -811,6 +852,8 @@ F2FS_FEATURE_RO_ATTR(encrypted_casefold); #endif /* CONFIG_FS_ENCRYPTION */ #ifdef CONFIG_BLK_DEV_ZONED F2FS_FEATURE_RO_ATTR(block_zoned); +F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec, + unusable_blocks_per_sec); #endif F2FS_FEATURE_RO_ATTR(atomic_write); F2FS_FEATURE_RO_ATTR(extra_attr); @@ -848,6 +891,12 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole); +/* For atomic write */ +F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, current_atomic_write, current_atomic_write); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, peak_atomic_write, peak_atomic_write); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, committed_atomic_block, committed_atomic_block); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block); + #define ATTR_LIST(name) (&f2fs_attr_##name.attr) static struct attribute *f2fs_attrs[] = { ATTR_LIST(gc_urgent_sleep_time), @@ -919,6 +968,9 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(moved_blocks_background), ATTR_LIST(avg_vblocks), #endif +#ifdef CONFIG_BLK_DEV_ZONED + ATTR_LIST(unusable_blocks_per_sec), +#endif #ifdef CONFIG_F2FS_FS_COMPRESSION ATTR_LIST(compr_written_block), ATTR_LIST(compr_saved_block), @@ -934,6 +986,10 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(gc_reclaimed_segments), ATTR_LIST(max_fragment_chunk), ATTR_LIST(max_fragment_hole), + ATTR_LIST(current_atomic_write), + ATTR_LIST(peak_atomic_write), + ATTR_LIST(committed_atomic_block), + ATTR_LIST(revoked_atomic_block), NULL, }; ATTRIBUTE_GROUPS(f2fs); diff --git a/fs/fuse/control.c b/fs/fuse/control.c index 7cede9a3bc96..247ef4f76761 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -258,7 +258,7 @@ int fuse_ctl_add_conn(struct fuse_conn *fc) struct dentry *parent; char name[32]; - if (!fuse_control_sb) + if (!fuse_control_sb || fc->no_control) return 0; parent = fuse_control_sb->s_root; @@ -296,7 +296,7 @@ void fuse_ctl_remove_conn(struct fuse_conn *fc) { int i; - if (!fuse_control_sb) + if (!fuse_control_sb || fc->no_control) return; for (i = fc->ctl_ndents - 1; i >= 0; i--) { diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index 10eb50cbf398..e23e802a8013 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -138,9 +138,9 @@ static struct fuse_dax_mapping *alloc_dax_mapping(struct fuse_conn_dax *fcd) WARN_ON(fcd->nr_free_ranges <= 0); fcd->nr_free_ranges--; } + __kick_dmap_free_worker(fcd, 0); spin_unlock(&fcd->lock); - kick_dmap_free_worker(fcd, 0); return dmap; } diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 74303d6e987b..b585b04e815e 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -11,6 +11,7 @@ #include <linux/pagemap.h> #include <linux/file.h> #include <linux/fs_context.h> +#include <linux/moduleparam.h> #include <linux/sched.h> #include <linux/namei.h> #include <linux/slab.h> @@ -21,6 +22,11 @@ #include <linux/types.h> #include <linux/kernel.h> +static bool __read_mostly allow_sys_admin_access; +module_param(allow_sys_admin_access, bool, 0644); +MODULE_PARM_DESC(allow_sys_admin_access, + "Allow users with CAP_SYS_ADMIN in initial userns to bypass allow_other access check"); + static void fuse_advise_use_readdirplus(struct inode *dir) { struct fuse_inode *fi = get_fuse_inode(dir); @@ -537,6 +543,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, struct fuse_file *ff; void *security_ctx = NULL; u32 security_ctxlen; + bool trunc = flags & O_TRUNC; /* Userspace expects S_IFREG in create mode */ BUG_ON((mode & S_IFMT) != S_IFREG); @@ -561,7 +568,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, inarg.mode = mode; inarg.umask = current_umask(); - if (fm->fc->handle_killpriv_v2 && (flags & O_TRUNC) && + if (fm->fc->handle_killpriv_v2 && trunc && !(flags & O_EXCL) && !capable(CAP_FSETID)) { inarg.open_flags |= FUSE_OPEN_KILL_SUIDGID; } @@ -623,6 +630,10 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, } else { file->private_data = ff; fuse_finish_open(inode, file); + if (fm->fc->atomic_o_trunc && trunc) + truncate_pagecache(inode, 0); + else if (!(ff->open_flags & FOPEN_KEEP_CACHE)) + invalidate_inode_pages2(inode->i_mapping); } return err; @@ -1224,6 +1235,9 @@ int fuse_allow_current_process(struct fuse_conn *fc) { const struct cred *cred; + if (allow_sys_admin_access && capable(CAP_SYS_ADMIN)) + return 1; + if (fc->allow_other) return current_in_userns(fc->user_ns); diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 00fa861aeead..7154b9555f39 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -210,13 +210,9 @@ void fuse_finish_open(struct inode *inode, struct file *file) fi->attr_version = atomic64_inc_return(&fc->attr_version); i_size_write(inode, 0); spin_unlock(&fi->lock); - truncate_pagecache(inode, 0); file_update_time(file); fuse_invalidate_attr_mask(inode, FUSE_STATX_MODSIZE); - } else if (!(ff->open_flags & FOPEN_KEEP_CACHE)) { - invalidate_inode_pages2(inode->i_mapping); } - if ((file->f_mode & FMODE_WRITE) && fc->writeback_cache) fuse_link_write_file(file); } @@ -239,30 +235,38 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir) if (err) return err; - if (is_wb_truncate || dax_truncate) { + if (is_wb_truncate || dax_truncate) inode_lock(inode); - fuse_set_nowrite(inode); - } if (dax_truncate) { filemap_invalidate_lock(inode->i_mapping); err = fuse_dax_break_layouts(inode, 0, 0); if (err) - goto out; + goto out_inode_unlock; } + if (is_wb_truncate || dax_truncate) + fuse_set_nowrite(inode); + err = fuse_do_open(fm, get_node_id(inode), file, isdir); if (!err) fuse_finish_open(inode, file); -out: + if (is_wb_truncate || dax_truncate) + fuse_release_nowrite(inode); + if (!err) { + struct fuse_file *ff = file->private_data; + + if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) + truncate_pagecache(inode, 0); + else if (!(ff->open_flags & FOPEN_KEEP_CACHE)) + invalidate_inode_pages2(inode->i_mapping); + } if (dax_truncate) filemap_invalidate_unlock(inode->i_mapping); - - if (is_wb_truncate | dax_truncate) { - fuse_release_nowrite(inode); +out_inode_unlock: + if (is_wb_truncate || dax_truncate) inode_unlock(inode); - } return err; } @@ -338,6 +342,15 @@ static int fuse_open(struct inode *inode, struct file *file) static int fuse_release(struct inode *inode, struct file *file) { + struct fuse_conn *fc = get_fuse_conn(inode); + + /* + * Dirty pages might remain despite write_inode_now() call from + * fuse_flush() due to writes racing with the close. + */ + if (fc->writeback_cache) + write_inode_now(inode, 1); + fuse_release_common(file, false); /* return value is ignored by VFS */ diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 8c0665c5dff8..6b3beda16c1b 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -180,6 +180,12 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, inode->i_uid = make_kuid(fc->user_ns, attr->uid); inode->i_gid = make_kgid(fc->user_ns, attr->gid); inode->i_blocks = attr->blocks; + + /* Sanitize nsecs */ + attr->atimensec = min_t(u32, attr->atimensec, NSEC_PER_SEC - 1); + attr->mtimensec = min_t(u32, attr->mtimensec, NSEC_PER_SEC - 1); + attr->ctimensec = min_t(u32, attr->ctimensec, NSEC_PER_SEC - 1); + inode->i_atime.tv_sec = attr->atime; inode->i_atime.tv_nsec = attr->atimensec; /* mtime from server may be stale due to local buffered write */ @@ -476,8 +482,14 @@ static void fuse_umount_begin(struct super_block *sb) { struct fuse_conn *fc = get_fuse_conn_super(sb); - if (!fc->no_force_umount) - fuse_abort_conn(fc); + if (fc->no_force_umount) + return; + + fuse_abort_conn(fc); + + // Only retire block-device-based superblocks. + if (sb->s_bdev != NULL) + retire_super(sb); } static void fuse_send_destroy(struct fuse_mount *fm) diff --git a/fs/fuse/ioctl.c b/fs/fuse/ioctl.c index 33cde4bbccdc..61d8afcb10a3 100644 --- a/fs/fuse/ioctl.c +++ b/fs/fuse/ioctl.c @@ -9,6 +9,17 @@ #include <linux/compat.h> #include <linux/fileattr.h> +static ssize_t fuse_send_ioctl(struct fuse_mount *fm, struct fuse_args *args) +{ + ssize_t ret = fuse_simple_request(fm, args); + + /* Translate ENOSYS, which shouldn't be returned from fs */ + if (ret == -ENOSYS) + ret = -ENOTTY; + + return ret; +} + /* * CUSE servers compiled on 32bit broke on 64bit kernels because the * ABI was defined to be 'struct iovec' which is different on 32bit @@ -259,7 +270,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, ap.args.out_pages = true; ap.args.out_argvar = true; - transferred = fuse_simple_request(fm, &ap.args); + transferred = fuse_send_ioctl(fm, &ap.args); err = transferred; if (transferred < 0) goto out; @@ -393,7 +404,7 @@ static int fuse_priv_ioctl(struct inode *inode, struct fuse_file *ff, args.out_args[1].size = inarg.out_size; args.out_args[1].value = ptr; - err = fuse_simple_request(fm, &args); + err = fuse_send_ioctl(fm, &args); if (!err) { if (outarg.result < 0) err = outarg.result; diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index 8db53fa67359..4d8d4f16c727 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -741,8 +741,7 @@ out: } /* Free virtqueues (device must already be reset) */ -static void virtio_fs_cleanup_vqs(struct virtio_device *vdev, - struct virtio_fs *fs) +static void virtio_fs_cleanup_vqs(struct virtio_device *vdev) { vdev->config->del_vqs(vdev); } @@ -757,7 +756,7 @@ static long virtio_fs_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, { struct virtio_fs *fs = dax_get_private(dax_dev); phys_addr_t offset = PFN_PHYS(pgoff); - size_t max_nr_pages = fs->window_len/PAGE_SIZE - pgoff; + size_t max_nr_pages = fs->window_len / PAGE_SIZE - pgoff; if (kaddr) *kaddr = fs->window_kaddr + offset; @@ -895,7 +894,7 @@ static int virtio_fs_probe(struct virtio_device *vdev) out_vqs: virtio_reset_device(vdev); - virtio_fs_cleanup_vqs(vdev, fs); + virtio_fs_cleanup_vqs(vdev); kfree(fs->vqs); out: @@ -927,7 +926,7 @@ static void virtio_fs_remove(struct virtio_device *vdev) virtio_fs_stop_all_queues(fs); virtio_fs_drain_all_queues_locked(fs); virtio_reset_device(vdev); - virtio_fs_cleanup_vqs(vdev, fs); + virtio_fs_cleanup_vqs(vdev); vdev->priv = NULL; /* Put device reference on virtio_fs object */ diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c index 2eada97bbd23..e065a5b9a442 100644 --- a/fs/overlayfs/export.c +++ b/fs/overlayfs/export.c @@ -259,7 +259,7 @@ static int ovl_encode_fh(struct inode *inode, u32 *fid, int *max_len, return FILEID_INVALID; dentry = d_find_any_alias(inode); - if (WARN_ON(!dentry)) + if (!dentry) return FILEID_INVALID; bytes = ovl_dentry_to_fid(ofs, dentry, fid, buflen); diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 7922b619f6c8..b45fea69fff3 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -454,6 +454,7 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size) return res; } +#ifdef CONFIG_FS_POSIX_ACL /* * Apply the idmapping of the layer to POSIX ACLs. The caller must pass a clone * of the POSIX ACLs retrieved from the lower layer to this function to not @@ -497,7 +498,7 @@ struct posix_acl *ovl_get_acl(struct inode *inode, int type, bool rcu) struct posix_acl *acl, *clone; struct path realpath; - if (!IS_ENABLED(CONFIG_FS_POSIX_ACL) || !IS_POSIXACL(realinode)) + if (!IS_POSIXACL(realinode)) return NULL; /* Careful in RCU walk mode */ @@ -543,6 +544,7 @@ struct posix_acl *ovl_get_acl(struct inode *inode, int type, bool rcu) posix_acl_release(acl); return clone; } +#endif int ovl_update_time(struct inode *inode, struct timespec64 *ts, int flags) { diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index 65c4346a5b43..69dc577974f8 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -42,7 +42,7 @@ static int ovl_check_redirect(struct path *path, struct ovl_lookup_data *d, * One of the ancestor path elements in an absolute path * lookup in ovl_lookup_layer() could have been opaque and * that will stop further lookup in lower layers (d->stop=true) - * But we have found an absolute redirect in decendant path + * But we have found an absolute redirect in descendant path * element and that should force continue lookup in lower * layers (reset d->stop). */ @@ -648,7 +648,7 @@ static int ovl_get_index_name_fh(struct ovl_fh *fh, struct qstr *name) * If the index dentry for a copy up origin inode is positive, but points * to an inode different than the upper inode, then either the upper inode * has been copied up and not indexed or it was indexed, but since then - * index dir was cleared. Either way, that index cannot be used to indentify + * index dir was cleared. Either way, that index cannot be used to identify * the overlay inode. */ int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin, diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 6ec815b84d48..87759165d32b 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -590,7 +590,13 @@ int ovl_xattr_set(struct dentry *dentry, struct inode *inode, const char *name, int ovl_xattr_get(struct dentry *dentry, struct inode *inode, const char *name, void *value, size_t size); ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); + +#ifdef CONFIG_FS_POSIX_ACL struct posix_acl *ovl_get_acl(struct inode *inode, int type, bool rcu); +#else +#define ovl_get_acl NULL +#endif + int ovl_update_time(struct inode *inode, struct timespec64 *ts, int flags); bool ovl_is_private_xattr(struct super_block *sb, const char *name); diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index e0a2e0468ee7..ec746d447f1b 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -301,7 +301,7 @@ static int ovl_sync_fs(struct super_block *sb, int wait) /** * ovl_statfs - * @sb: The overlayfs super block + * @dentry: The dentry to query * @buf: The struct kstatfs to fill in with stats * * Get the filesystem statistics. As writes always target the upper layer @@ -349,6 +349,8 @@ static inline int ovl_xino_def(void) /** * ovl_show_options + * @m: the seq_file handle + * @dentry: The dentry to query * * Prints the mount options for a given superblock. * Returns zero; does not fail. @@ -1412,11 +1414,12 @@ static int ovl_make_workdir(struct super_block *sb, struct ovl_fs *ofs, */ err = ovl_setxattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE, "0", 1); if (err) { + pr_warn("failed to set xattr on upper\n"); ofs->noxattr = true; if (ofs->config.index || ofs->config.metacopy) { ofs->config.index = false; ofs->config.metacopy = false; - pr_warn("upper fs does not support xattr, falling back to index=off,metacopy=off.\n"); + pr_warn("...falling back to index=off,metacopy=off.\n"); } /* * xattr support is required for persistent st_ino. @@ -1424,8 +1427,10 @@ static int ovl_make_workdir(struct super_block *sb, struct ovl_fs *ofs, */ if (ofs->config.xino == OVL_XINO_AUTO) { ofs->config.xino = OVL_XINO_OFF; - pr_warn("upper fs does not support xattr, falling back to xino=off.\n"); + pr_warn("...falling back to xino=off.\n"); } + if (err == -EPERM && !ofs->config.userxattr) + pr_info("try mounting with 'userxattr' option\n"); err = 0; } else { ovl_removexattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE); @@ -2032,7 +2037,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) sb->s_stack_depth = 0; sb->s_maxbytes = MAX_LFS_FILESIZE; atomic_long_set(&ofs->last_ino, 1); - /* Assume underlaying fs uses 32bit inodes unless proven otherwise */ + /* Assume underlying fs uses 32bit inodes unless proven otherwise */ if (ofs->config.xino != OVL_XINO_OFF) { ofs->xino_mode = BITS_PER_LONG - 32; if (!ofs->xino_mode) { diff --git a/fs/super.c b/fs/super.c index 4fca6657f442..734ed584a946 100644 --- a/fs/super.c +++ b/fs/super.c @@ -423,6 +423,35 @@ bool trylock_super(struct super_block *sb) } /** + * retire_super - prevents superblock from being reused + * @sb: superblock to retire + * + * The function marks superblock to be ignored in superblock test, which + * prevents it from being reused for any new mounts. If the superblock has + * a private bdi, it also unregisters it, but doesn't reduce the refcount + * of the superblock to prevent potential races. The refcount is reduced + * by generic_shutdown_super(). The function can not be called + * concurrently with generic_shutdown_super(). It is safe to call the + * function multiple times, subsequent calls have no effect. + * + * The marker will affect the re-use only for block-device-based + * superblocks. Other superblocks will still get marked if this function + * is used, but that will not affect their reusability. + */ +void retire_super(struct super_block *sb) +{ + WARN_ON(!sb->s_bdev); + down_write(&sb->s_umount); + if (sb->s_iflags & SB_I_PERSB_BDI) { + bdi_unregister(sb->s_bdi); + sb->s_iflags &= ~SB_I_PERSB_BDI; + } + sb->s_iflags |= SB_I_RETIRED; + up_write(&sb->s_umount); +} +EXPORT_SYMBOL(retire_super); + +/** * generic_shutdown_super - common helper for ->kill_sb() * @sb: superblock to kill * @@ -1216,7 +1245,7 @@ static int set_bdev_super_fc(struct super_block *s, struct fs_context *fc) static int test_bdev_super_fc(struct super_block *s, struct fs_context *fc) { - return s->s_bdev == fc->sget_key; + return !(s->s_iflags & SB_I_RETIRED) && s->s_bdev == fc->sget_key; } /** @@ -1309,7 +1338,7 @@ EXPORT_SYMBOL(get_tree_bdev); static int test_bdev_super(struct super_block *s, void *data) { - return (void *)s->s_bdev == data; + return !(s->s_iflags & SB_I_RETIRED) && (void *)s->s_bdev == data; } struct dentry *mount_bdev(struct file_system_type *fs_type, diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h index d5b9c8d40c18..1518568aaf0f 100644 --- a/include/linux/console_struct.h +++ b/include/linux/console_struct.h @@ -17,7 +17,7 @@ #include <linux/vt.h> #include <linux/workqueue.h> -struct uni_pagedir; +struct uni_pagedict; struct uni_screen; #define NPAR 16 @@ -157,8 +157,8 @@ struct vc_data { unsigned int vc_bell_duration; /* Console bell duration */ unsigned short vc_cur_blink_ms; /* Cursor blink duration */ struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */ - struct uni_pagedir *vc_uni_pagedir; - struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */ + struct uni_pagedict *uni_pagedict; + struct uni_pagedict **uni_pagedict_loc; /* [!] Location of uni_pagedict variable for this console */ struct uni_screen *vc_uni_screen; /* unicode screen content */ /* additional information is in vt_kern.h */ }; diff --git a/include/linux/consolemap.h b/include/linux/consolemap.h index bcfce748c9d8..c35db4896c37 100644 --- a/include/linux/consolemap.h +++ b/include/linux/consolemap.h @@ -7,30 +7,56 @@ #ifndef __LINUX_CONSOLEMAP_H__ #define __LINUX_CONSOLEMAP_H__ -#define LAT1_MAP 0 -#define GRAF_MAP 1 -#define IBMPC_MAP 2 -#define USER_MAP 3 +enum translation_map { + LAT1_MAP, + GRAF_MAP, + IBMPC_MAP, + USER_MAP, + + FIRST_MAP = LAT1_MAP, + LAST_MAP = USER_MAP, +}; #include <linux/types.h> -#ifdef CONFIG_CONSOLE_TRANSLATIONS struct vc_data; -extern u16 inverse_translate(const struct vc_data *conp, int glyph, - int use_unicode); -extern unsigned short *set_translate(int m, struct vc_data *vc); -extern int conv_uni_to_pc(struct vc_data *conp, long ucs); -extern u32 conv_8bit_to_uni(unsigned char c); -extern int conv_uni_to_8bit(u32 uni); +#ifdef CONFIG_CONSOLE_TRANSLATIONS +u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode); +unsigned short *set_translate(enum translation_map m, struct vc_data *vc); +int conv_uni_to_pc(struct vc_data *conp, long ucs); +u32 conv_8bit_to_uni(unsigned char c); +int conv_uni_to_8bit(u32 uni); void console_map_init(void); #else -#define inverse_translate(conp, glyph, uni) ((uint16_t)glyph) -#define set_translate(m, vc) ((unsigned short *)NULL) -#define conv_uni_to_pc(conp, ucs) ((int) (ucs > 0xff ? -1: ucs)) -#define conv_8bit_to_uni(c) ((uint32_t)(c)) -#define conv_uni_to_8bit(c) ((int) ((c) & 0xff)) -#define console_map_init(c) do { ; } while (0) +static inline u16 inverse_translate(const struct vc_data *conp, u16 glyph, + bool use_unicode) +{ + return glyph; +} + +static inline unsigned short *set_translate(enum translation_map m, + struct vc_data *vc) +{ + return NULL; +} + +static inline int conv_uni_to_pc(struct vc_data *conp, long ucs) +{ + return ucs > 0xff ? -1 : ucs; +} + +static inline u32 conv_8bit_to_uni(unsigned char c) +{ + return c; +} + +static inline int conv_uni_to_8bit(u32 uni) +{ + return uni & 0xff; +} + +static inline void console_map_init(void) { } #endif /* CONFIG_CONSOLE_TRANSLATIONS */ #endif /* __LINUX_CONSOLEMAP_H__ */ diff --git a/include/linux/fs.h b/include/linux/fs.h index a3522bd811f9..8c127ffa6563 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1433,6 +1433,7 @@ extern int send_sigurg(struct fown_struct *fown); #define SB_I_SKIP_SYNC 0x00000100 /* Skip superblock at global sync */ #define SB_I_PERSB_BDI 0x00000200 /* has a per-sb bdi */ #define SB_I_TS_EXPIRY_WARNED 0x00000400 /* warned about timestamp range expiry */ +#define SB_I_RETIRED 0x00000800 /* superblock shouldn't be reused */ /* Possible states of 'frozen' field */ enum { @@ -2565,6 +2566,7 @@ extern struct dentry *mount_nodev(struct file_system_type *fs_type, int flags, void *data, int (*fill_super)(struct super_block *, void *, int)); extern struct dentry *mount_subtree(struct vfsmount *mnt, const char *path); +void retire_super(struct super_block *sb); void generic_shutdown_super(struct super_block *sb); void kill_block_super(struct super_block *sb); void kill_anon_super(struct super_block *sb); diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h index 44365aab043c..a8f0070c7aa9 100644 --- a/include/linux/mailbox/mtk-cmdq-mailbox.h +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h @@ -67,24 +67,14 @@ enum cmdq_code { struct cmdq_cb_data { int sta; - void *data; struct cmdq_pkt *pkt; }; -typedef void (*cmdq_async_flush_cb)(struct cmdq_cb_data data); - -struct cmdq_task_cb { - cmdq_async_flush_cb cb; - void *data; -}; - struct cmdq_pkt { void *va_base; dma_addr_t pa_base; size_t cmd_buf_size; /* command occupied size */ size_t buf_size; /* real buffer size */ - struct cmdq_task_cb cb; - struct cmdq_task_cb async_cb; void *cl; }; diff --git a/include/linux/serial.h b/include/linux/serial.h index 0b8b7d7c8f33..3d6fe3ef92cf 100644 --- a/include/linux/serial.h +++ b/include/linux/serial.h @@ -9,12 +9,20 @@ #ifndef _LINUX_SERIAL_H #define _LINUX_SERIAL_H -#include <asm/page.h> #include <uapi/linux/serial.h> +#include <uapi/linux/serial_reg.h> /* Helper for dealing with UART_LCR_WLEN* defines */ #define UART_LCR_WLEN(x) ((x) - 5) +/* FIFO and shifting register empty */ +#define UART_LSR_BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) + +static inline bool uart_lsr_tx_empty(u16 lsr) +{ + return (lsr & UART_LSR_BOTH_EMPTY) == UART_LSR_BOTH_EMPTY; +} + /* * Counters of the input lines (CTS, DSR, RI, CD) interrupts */ @@ -25,11 +33,6 @@ struct async_icount { __u32 buf_overrun; }; -/* - * The size of the serial xmit buffer is 1 page, or 4096 bytes - */ -#define SERIAL_XMIT_SIZE PAGE_SIZE - #include <linux/compiler.h> #endif /* _LINUX_SERIAL_H */ diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index ff84a3ed10ea..8c7b793aa4d7 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -119,7 +119,8 @@ struct uart_8250_port { * be immediately processed. */ #define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS - unsigned char lsr_saved_flags; + u16 lsr_saved_flags; + u16 lsr_save_mask; #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA unsigned char msr_saved_flags; @@ -170,8 +171,8 @@ extern void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud, unsigned int quot_frac); extern int fsl8250_handle_irq(struct uart_port *port); int serial8250_handle_irq(struct uart_port *port, unsigned int iir); -unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); -void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr); +u16 serial8250_rx_chars(struct uart_8250_port *up, u16 lsr); +void serial8250_read_char(struct uart_8250_port *up, u16 lsr); void serial8250_tx_chars(struct uart_8250_port *up); unsigned int serial8250_modem_status(struct uart_8250_port *up); void serial8250_init_port(struct uart_8250_port *up); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index fde258b3decd..aef3145f2032 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -31,9 +31,336 @@ struct serial_struct; struct device; struct gpio_desc; -/* +/** + * struct uart_ops -- interface between serial_core and the driver + * * This structure describes all the operations that can be done on the - * physical hardware. See Documentation/driver-api/serial/driver.rst for details. + * physical hardware. + * + * @tx_empty: ``unsigned int ()(struct uart_port *port)`` + * + * This function tests whether the transmitter fifo and shifter for the + * @port is empty. If it is empty, this function should return + * %TIOCSER_TEMT, otherwise return 0. If the port does not support this + * operation, then it should return %TIOCSER_TEMT. + * + * Locking: none. + * Interrupts: caller dependent. + * This call must not sleep + * + * @set_mctrl: ``void ()(struct uart_port *port, unsigned int mctrl)`` + * + * This function sets the modem control lines for @port to the state + * described by @mctrl. The relevant bits of @mctrl are: + * + * - %TIOCM_RTS RTS signal. + * - %TIOCM_DTR DTR signal. + * - %TIOCM_OUT1 OUT1 signal. + * - %TIOCM_OUT2 OUT2 signal. + * - %TIOCM_LOOP Set the port into loopback mode. + * + * If the appropriate bit is set, the signal should be driven + * active. If the bit is clear, the signal should be driven + * inactive. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @get_mctrl: ``unsigned int ()(struct uart_port *port)`` + * + * Returns the current state of modem control inputs of @port. The state + * of the outputs should not be returned, since the core keeps track of + * their state. The state information should include: + * + * - %TIOCM_CAR state of DCD signal + * - %TIOCM_CTS state of CTS signal + * - %TIOCM_DSR state of DSR signal + * - %TIOCM_RI state of RI signal + * + * The bit is set if the signal is currently driven active. If + * the port does not support CTS, DCD or DSR, the driver should + * indicate that the signal is permanently active. If RI is + * not available, the signal should not be indicated as active. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @stop_tx: ``void ()(struct uart_port *port)`` + * + * Stop transmitting characters. This might be due to the CTS line + * becoming inactive or the tty layer indicating we want to stop + * transmission due to an %XOFF character. + * + * The driver should stop transmitting characters as soon as possible. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @start_tx: ``void ()(struct uart_port *port)`` + * + * Start transmitting characters. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @throttle: ``void ()(struct uart_port *port)`` + * + * Notify the serial driver that input buffers for the line discipline are + * close to full, and it should somehow signal that no more characters + * should be sent to the serial port. + * This will be called only if hardware assisted flow control is enabled. + * + * Locking: serialized with @unthrottle() and termios modification by the + * tty layer. + * + * @unthrottle: ``void ()(struct uart_port *port)`` + * + * Notify the serial driver that characters can now be sent to the serial + * port without fear of overrunning the input buffers of the line + * disciplines. + * + * This will be called only if hardware assisted flow control is enabled. + * + * Locking: serialized with @throttle() and termios modification by the + * tty layer. + * + * @send_xchar: ``void ()(struct uart_port *port, char ch)`` + * + * Transmit a high priority character, even if the port is stopped. This + * is used to implement XON/XOFF flow control and tcflow(). If the serial + * driver does not implement this function, the tty core will append the + * character to the circular buffer and then call start_tx() / stop_tx() + * to flush the data out. + * + * Do not transmit if @ch == '\0' (%__DISABLED_CHAR). + * + * Locking: none. + * Interrupts: caller dependent. + * + * @stop_rx: ``void ()(struct uart_port *port)`` + * + * Stop receiving characters; the @port is in the process of being closed. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @enable_ms: ``void ()(struct uart_port *port)`` + * + * Enable the modem status interrupts. + * + * This method may be called multiple times. Modem status interrupts + * should be disabled when the @shutdown() method is called. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @break_ctl: ``void ()(struct uart_port *port, int ctl)`` + * + * Control the transmission of a break signal. If @ctl is nonzero, the + * break signal should be transmitted. The signal should be terminated + * when another call is made with a zero @ctl. + * + * Locking: caller holds tty_port->mutex + * + * @startup: ``int ()(struct uart_port *port)`` + * + * Grab any interrupt resources and initialise any low level driver state. + * Enable the port for reception. It should not activate RTS nor DTR; + * this will be done via a separate call to @set_mctrl(). + * + * This method will only be called when the port is initially opened. + * + * Locking: port_sem taken. + * Interrupts: globally disabled. + * + * @shutdown: ``void ()(struct uart_port *port)`` + * + * Disable the @port, disable any break condition that may be in effect, + * and free any interrupt resources. It should not disable RTS nor DTR; + * this will have already been done via a separate call to @set_mctrl(). + * + * Drivers must not access @port->state once this call has completed. + * + * This method will only be called when there are no more users of this + * @port. + * + * Locking: port_sem taken. + * Interrupts: caller dependent. + * + * @flush_buffer: ``void ()(struct uart_port *port)`` + * + * Flush any write buffers, reset any DMA state and stop any ongoing DMA + * transfers. + * + * This will be called whenever the @port->state->xmit circular buffer is + * cleared. + * + * Locking: @port->lock taken. + * Interrupts: locally disabled. + * This call must not sleep + * + * @set_termios: ``void ()(struct uart_port *port, struct ktermios *new, + * struct ktermios *old)`` + * + * Change the @port parameters, including word length, parity, stop bits. + * Update @port->read_status_mask and @port->ignore_status_mask to + * indicate the types of events we are interested in receiving. Relevant + * ktermios::c_cflag bits are: + * + * - %CSIZE - word size + * - %CSTOPB - 2 stop bits + * - %PARENB - parity enable + * - %PARODD - odd parity (when %PARENB is in force) + * - %ADDRB - address bit (changed through uart_port::rs485_config()). + * - %CREAD - enable reception of characters (if not set, still receive + * characters from the port, but throw them away). + * - %CRTSCTS - if set, enable CTS status change reporting. + * - %CLOCAL - if not set, enable modem status change reporting. + * + * Relevant ktermios::c_iflag bits are: + * + * - %INPCK - enable frame and parity error events to be passed to the TTY + * layer. + * - %BRKINT / %PARMRK - both of these enable break events to be passed to + * the TTY layer. + * - %IGNPAR - ignore parity and framing errors. + * - %IGNBRK - ignore break errors. If %IGNPAR is also set, ignore overrun + * errors as well. + * + * The interaction of the ktermios::c_iflag bits is as follows (parity + * error given as an example): + * + * ============ ======= ======= ========================================= + * Parity error INPCK IGNPAR + * ============ ======= ======= ========================================= + * n/a 0 n/a character received, marked as %TTY_NORMAL + * None 1 n/a character received, marked as %TTY_NORMAL + * Yes 1 0 character received, marked as %TTY_PARITY + * Yes 1 1 character discarded + * ============ ======= ======= ========================================= + * + * Other flags may be used (eg, xon/xoff characters) if your hardware + * supports hardware "soft" flow control. + * + * Locking: caller holds tty_port->mutex + * Interrupts: caller dependent. + * This call must not sleep + * + * @set_ldisc: ``void ()(struct uart_port *port, struct ktermios *termios)`` + * + * Notifier for discipline change. See + * Documentation/driver-api/tty/tty_ldisc.rst. + * + * Locking: caller holds tty_port->mutex + * + * @pm: ``void ()(struct uart_port *port, unsigned int state, + * unsigned int oldstate)`` + * + * Perform any power management related activities on the specified @port. + * @state indicates the new state (defined by enum uart_pm_state), + * @oldstate indicates the previous state. + * + * This function should not be used to grab any resources. + * + * This will be called when the @port is initially opened and finally + * closed, except when the @port is also the system console. This will + * occur even if %CONFIG_PM is not set. + * + * Locking: none. + * Interrupts: caller dependent. + * + * @type: ``const char *()(struct uart_port *port)`` + * + * Return a pointer to a string constant describing the specified @port, + * or return %NULL, in which case the string 'unknown' is substituted. + * + * Locking: none. + * Interrupts: caller dependent. + * + * @release_port: ``void ()(struct uart_port *port)`` + * + * Release any memory and IO region resources currently in use by the + * @port. + * + * Locking: none. + * Interrupts: caller dependent. + * + * @request_port: ``int ()(struct uart_port *port)`` + * + * Request any memory and IO region resources required by the port. If any + * fail, no resources should be registered when this function returns, and + * it should return -%EBUSY on failure. + * + * Locking: none. + * Interrupts: caller dependent. + * + * @config_port: ``void ()(struct uart_port *port, int type)`` + * + * Perform any autoconfiguration steps required for the @port. @type + * contains a bit mask of the required configuration. %UART_CONFIG_TYPE + * indicates that the port requires detection and identification. + * @port->type should be set to the type found, or %PORT_UNKNOWN if no + * port was detected. + * + * %UART_CONFIG_IRQ indicates autoconfiguration of the interrupt signal, + * which should be probed using standard kernel autoprobing techniques. + * This is not necessary on platforms where ports have interrupts + * internally hard wired (eg, system on a chip implementations). + * + * Locking: none. + * Interrupts: caller dependent. + * + * @verify_port: ``int ()(struct uart_port *port, + * struct serial_struct *serinfo)`` + * + * Verify the new serial port information contained within @serinfo is + * suitable for this port type. + * + * Locking: none. + * Interrupts: caller dependent. + * + * @ioctl: ``int ()(struct uart_port *port, unsigned int cmd, + * unsigned long arg)`` + * + * Perform any port specific IOCTLs. IOCTL commands must be defined using + * the standard numbering system found in <asm/ioctl.h>. + * + * Locking: none. + * Interrupts: caller dependent. + * + * @poll_init: ``int ()(struct uart_port *port)`` + * + * Called by kgdb to perform the minimal hardware initialization needed to + * support @poll_put_char() and @poll_get_char(). Unlike @startup(), this + * should not request interrupts. + * + * Locking: %tty_mutex and tty_port->mutex taken. + * Interrupts: n/a. + * + * @poll_put_char: ``void ()(struct uart_port *port, unsigned char ch)`` + * + * Called by kgdb to write a single character @ch directly to the serial + * @port. It can and should block until there is space in the TX FIFO. + * + * Locking: none. + * Interrupts: caller dependent. + * This call must not sleep + * + * @poll_get_char: ``int ()(struct uart_port *port)`` + * + * Called by kgdb to read a single character directly from the serial + * port. If data is available, it should be returned; otherwise the + * function should return %NO_POLL_CHAR immediately. + * + * Locking: none. + * Interrupts: caller dependent. + * This call must not sleep */ struct uart_ops { unsigned int (*tx_empty)(struct uart_port *); @@ -56,22 +383,8 @@ struct uart_ops { void (*set_ldisc)(struct uart_port *, struct ktermios *); void (*pm)(struct uart_port *, unsigned int state, unsigned int oldstate); - - /* - * Return a string describing the type of the port - */ const char *(*type)(struct uart_port *); - - /* - * Release IO and memory resources used by the port. - * This includes iounmap if necessary. - */ void (*release_port)(struct uart_port *); - - /* - * Request IO and memory resources used by the port. - * This includes iomapping the port if necessary. - */ int (*request_port)(struct uart_port *); void (*config_port)(struct uart_port *, int); int (*verify_port)(struct uart_port *, struct serial_struct *); @@ -133,6 +446,7 @@ struct uart_port { unsigned int old); void (*handle_break)(struct uart_port *); int (*rs485_config)(struct uart_port *, + struct ktermios *termios, struct serial_rs485 *rs485); int (*iso7816_config)(struct uart_port *, struct serial_iso7816 *iso7816); @@ -232,7 +546,6 @@ struct uart_port { int hw_stopped; /* sw-assisted CTS flow state */ unsigned int mctrl; /* current modem ctrl settings */ - unsigned int timeout; /* character-based timeout */ unsigned int frame_time; /* frame timing in ns */ unsigned int type; /* port type */ const struct uart_ops *ops; @@ -255,6 +568,7 @@ struct uart_port { struct attribute_group *attr_group; /* port specific attributes */ const struct attribute_group **tty_groups; /* all attributes (serial core use only) */ struct serial_rs485 rs485; + struct serial_rs485 rs485_supported; /* Supported mask for serial_rs485 */ struct gpio_desc *rs485_term_gpio; /* enable RS485 bus termination */ struct serial_iso7816 iso7816; void *private_data; /* generic platform data pointer */ @@ -334,10 +648,23 @@ unsigned int uart_get_baud_rate(struct uart_port *port, struct ktermios *termios unsigned int max); unsigned int uart_get_divisor(struct uart_port *port, unsigned int baud); +/* + * Calculates FIFO drain time. + */ +static inline unsigned long uart_fifo_timeout(struct uart_port *port) +{ + u64 fifo_timeout = (u64)READ_ONCE(port->frame_time) * port->fifosize; + + /* Add .02 seconds of slop */ + fifo_timeout += 20 * NSEC_PER_MSEC; + + return max(nsecs_to_jiffies(fifo_timeout), 1UL); +} + /* Base timer interval for polling */ static inline int uart_poll_timeout(struct uart_port *port) { - int timeout = port->timeout; + int timeout = uart_fifo_timeout(port); return timeout > 6 ? (timeout / 2 - 2) : 1; } @@ -598,4 +925,5 @@ static inline int uart_handle_break(struct uart_port *port) !((cflag) & CLOCAL)) int uart_get_rs485_mode(struct uart_port *port); +int uart_rs485_config(struct uart_port *port); #endif /* LINUX_SERIAL_CORE_H */ diff --git a/include/linux/serial_s3c.h b/include/linux/serial_s3c.h index dec15f5b3dec..1672cf0810ef 100644 --- a/include/linux/serial_s3c.h +++ b/include/linux/serial_s3c.h @@ -83,7 +83,7 @@ #define S3C2410_UCON_RXIRQMODE (1<<0) #define S3C2410_UCON_RXFIFO_TOI (1<<7) #define S3C2443_UCON_RXERR_IRQEN (1<<6) -#define S3C2443_UCON_LOOPBACK (1<<5) +#define S3C2410_UCON_LOOPBACK (1<<5) #define S3C2410_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ S3C2410_UCON_RXILEVEL | \ diff --git a/include/linux/tty_buffer.h b/include/linux/tty_buffer.h index 3b9d77604291..1796648c2907 100644 --- a/include/linux/tty_buffer.h +++ b/include/linux/tty_buffer.h @@ -15,6 +15,7 @@ struct tty_buffer { int used; int size; int commit; + int lookahead; /* Lazy update on recv, can become less than "read" */ int read; int flags; /* Data points here */ diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index e85002b56752..ede6f2157f32 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -186,6 +186,18 @@ int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass, * indicate all data received is %TTY_NORMAL. If assigned, prefer this * function for automatic flow control. * + * @lookahead_buf: [DRV] ``void ()(struct tty_struct *tty, + * const unsigned char *cp, const char *fp, int count)`` + * + * This function is called by the low-level tty driver for characters + * not eaten by ->receive_buf() or ->receive_buf2(). It is useful for + * processing high-priority characters such as software flow-control + * characters that could otherwise get stuck into the intermediate + * buffer until tty has room to receive them. Ldisc must be able to + * handle later a ->receive_buf() or ->receive_buf2() call for the + * same characters (e.g. by skipping the actions for high-priority + * characters already handled by ->lookahead_buf()). + * * @owner: module containting this ldisc (for reference counting) * * This structure defines the interface between the tty line discipline @@ -229,6 +241,8 @@ struct tty_ldisc_ops { void (*dcd_change)(struct tty_struct *tty, unsigned int status); int (*receive_buf2)(struct tty_struct *tty, const unsigned char *cp, const char *fp, int count); + void (*lookahead_buf)(struct tty_struct *tty, const unsigned char *cp, + const unsigned char *fp, unsigned int count); struct module *owner; }; diff --git a/include/linux/tty_port.h b/include/linux/tty_port.h index 58e9619116b7..fa3c3bdaa234 100644 --- a/include/linux/tty_port.h +++ b/include/linux/tty_port.h @@ -40,6 +40,8 @@ struct tty_port_operations { struct tty_port_client_operations { int (*receive_buf)(struct tty_port *port, const unsigned char *, const unsigned char *, size_t); + void (*lookahead_buf)(struct tty_port *port, const unsigned char *cp, + const unsigned char *fp, unsigned int count); void (*write_wakeup)(struct tty_port *port); }; diff --git a/include/uapi/asm-generic/termbits-common.h b/include/uapi/asm-generic/termbits-common.h index 4d084fe8def5..4a6a79f28b21 100644 --- a/include/uapi/asm-generic/termbits-common.h +++ b/include/uapi/asm-generic/termbits-common.h @@ -46,6 +46,7 @@ typedef unsigned int speed_t; #define EXTA B19200 #define EXTB B38400 +#define ADDRB 0x20000000 /* address bit */ #define CMSPAR 0x40000000 /* mark or space (stick) parity */ #define CRTSCTS 0x80000000 /* flow control */ diff --git a/include/uapi/linux/f2fs.h b/include/uapi/linux/f2fs.h index 352a822d4370..3121d127d5aa 100644 --- a/include/uapi/linux/f2fs.h +++ b/include/uapi/linux/f2fs.h @@ -13,7 +13,7 @@ #define F2FS_IOC_COMMIT_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 2) #define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3) #define F2FS_IOC_RELEASE_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 4) -#define F2FS_IOC_ABORT_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 5) +#define F2FS_IOC_ABORT_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 5) #define F2FS_IOC_GARBAGE_COLLECT _IOW(F2FS_IOCTL_MAGIC, 6, __u32) #define F2FS_IOC_WRITE_CHECKPOINT _IO(F2FS_IOCTL_MAGIC, 7) #define F2FS_IOC_DEFRAGMENT _IOWR(F2FS_IOCTL_MAGIC, 8, \ diff --git a/include/uapi/linux/serial.h b/include/uapi/linux/serial.h index fa6b16e5fdd8..cea06924b295 100644 --- a/include/uapi/linux/serial.h +++ b/include/uapi/linux/serial.h @@ -126,10 +126,26 @@ struct serial_rs485 { #define SER_RS485_TERMINATE_BUS (1 << 5) /* Enable bus termination (if supported) */ + +/* RS-485 addressing mode */ +#define SER_RS485_ADDRB (1 << 6) /* Enable addressing mode */ +#define SER_RS485_ADDR_RECV (1 << 7) /* Receive address filter */ +#define SER_RS485_ADDR_DEST (1 << 8) /* Destination address */ + __u32 delay_rts_before_send; /* Delay before send (milliseconds) */ __u32 delay_rts_after_send; /* Delay after send (milliseconds) */ - __u32 padding[5]; /* Memory is cheap, new structs - are a royal PITA .. */ + + /* The fields below are defined by flags */ + union { + __u32 padding[5]; /* Memory is cheap, new structs are a pain */ + + struct { + __u8 addr_recv; + __u8 addr_dest; + __u8 padding0[2]; + __u32 padding1[4]; + }; + }; }; /* diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h index 6faf502b7860..3ba34d8378bd 100644 --- a/include/uapi/linux/serial_core.h +++ b/include/uapi/linux/serial_core.h @@ -124,10 +124,6 @@ /* TXX9 type number */ #define PORT_TXX9 64 -/* NEC VR4100 series SIU/DSIU */ -#define PORT_VR41XX_SIU 65 -#define PORT_VR41XX_DSIU 66 - /* Samsung S3C2400 SoC */ #define PORT_S3C2400 67 diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h index f51bc8f36813..bab3b39266cc 100644 --- a/include/uapi/linux/serial_reg.h +++ b/include/uapi/linux/serial_reg.h @@ -139,7 +139,7 @@ #define UART_LSR_PE 0x04 /* Parity error indicator */ #define UART_LSR_OE 0x02 /* Overrun error indicator */ #define UART_LSR_DR 0x01 /* Receiver data ready */ -#define UART_LSR_BRK_ERROR_BITS 0x1E /* BI, FE, PE, OE bits */ +#define UART_LSR_BRK_ERROR_BITS (UART_LSR_BI|UART_LSR_FE|UART_LSR_PE|UART_LSR_OE) #define UART_MSR 6 /* In: Modem Status Register */ #define UART_MSR_DCD 0x80 /* Data Carrier Detect */ @@ -150,7 +150,7 @@ #define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */ #define UART_MSR_DDSR 0x02 /* Delta DSR */ #define UART_MSR_DCTS 0x01 /* Delta CTS */ -#define UART_MSR_ANY_DELTA 0x0F /* Any of the delta bits! */ +#define UART_MSR_ANY_DELTA (UART_MSR_DDCD|UART_MSR_TERI|UART_MSR_DDSR|UART_MSR_DCTS) #define UART_SCR 7 /* I/O: Scratch Register */ diff --git a/init/Kconfig b/init/Kconfig index 8c9ad53b45dc..922848a094d7 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1933,298 +1933,7 @@ config MODULE_SIG_FORMAT def_bool n select SYSTEM_DATA_VERIFICATION -menuconfig MODULES - bool "Enable loadable module support" - modules - help - Kernel modules are small pieces of compiled code which can - be inserted in the running kernel, rather than being - permanently built into the kernel. You use the "modprobe" - tool to add (and sometimes remove) them. If you say Y here, - many parts of the kernel can be built as modules (by - answering M instead of Y where indicated): this is most - useful for infrequently used options which are not required - for booting. For more information, see the man pages for - modprobe, lsmod, modinfo, insmod and rmmod. - - If you say Y here, you will need to run "make - modules_install" to put the modules under /lib/modules/ - where modprobe can find them (you may need to be root to do - this). - - If unsure, say Y. - -if MODULES - -config MODULE_FORCE_LOAD - bool "Forced module loading" - default n - help - Allow loading of modules without version information (ie. modprobe - --force). Forced module loading sets the 'F' (forced) taint flag and - is usually a really bad idea. - -config MODULE_UNLOAD - bool "Module unloading" - help - Without this option you will not be able to unload any - modules (note that some modules may not be unloadable - anyway), which makes your kernel smaller, faster - and simpler. If unsure, say Y. - -config MODULE_FORCE_UNLOAD - bool "Forced module unloading" - depends on MODULE_UNLOAD - help - This option allows you to force a module to unload, even if the - kernel believes it is unsafe: the kernel will remove the module - without waiting for anyone to stop using it (using the -f option to - rmmod). This is mainly for kernel developers and desperate users. - If unsure, say N. - -config MODULE_UNLOAD_TAINT_TRACKING - bool "Tainted module unload tracking" - depends on MODULE_UNLOAD - default n - help - This option allows you to maintain a record of each unloaded - module that tainted the kernel. In addition to displaying a - list of linked (or loaded) modules e.g. on detection of a bad - page (see bad_page()), the aforementioned details are also - shown. If unsure, say N. - -config MODVERSIONS - bool "Module versioning support" - help - Usually, you have to use modules compiled with your kernel. - Saying Y here makes it sometimes possible to use modules - compiled for different kernels, by adding enough information - to the modules to (hopefully) spot any changes which would - make them incompatible with the kernel you are running. If - unsure, say N. - -config ASM_MODVERSIONS - bool - default HAVE_ASM_MODVERSIONS && MODVERSIONS - help - This enables module versioning for exported symbols also from - assembly. This can be enabled only when the target architecture - supports it. - -config MODULE_SRCVERSION_ALL - bool "Source checksum for all modules" - help - Modules which contain a MODULE_VERSION get an extra "srcversion" - field inserted into their modinfo section, which contains a - sum of the source files which made it. This helps maintainers - see exactly which source was used to build a module (since - others sometimes change the module source without updating - the version). With this option, such a "srcversion" field - will be created for all modules. If unsure, say N. - -config MODULE_SIG - bool "Module signature verification" - select MODULE_SIG_FORMAT - help - Check modules for valid signatures upon load: the signature - is simply appended to the module. For more information see - <file:Documentation/admin-guide/module-signing.rst>. - - Note that this option adds the OpenSSL development packages as a - kernel build dependency so that the signing tool can use its crypto - library. - - You should enable this option if you wish to use either - CONFIG_SECURITY_LOCKDOWN_LSM or lockdown functionality imposed via - another LSM - otherwise unsigned modules will be loadable regardless - of the lockdown policy. - - !!!WARNING!!! If you enable this option, you MUST make sure that the - module DOES NOT get stripped after being signed. This includes the - debuginfo strip done by some packagers (such as rpmbuild) and - inclusion into an initramfs that wants the module size reduced. - -config MODULE_SIG_FORCE - bool "Require modules to be validly signed" - depends on MODULE_SIG - help - Reject unsigned modules or signed modules for which we don't have a - key. Without this, such modules will simply taint the kernel. - -config MODULE_SIG_ALL - bool "Automatically sign all modules" - default y - depends on MODULE_SIG || IMA_APPRAISE_MODSIG - help - Sign all modules during make modules_install. Without this option, - modules must be signed manually, using the scripts/sign-file tool. - -comment "Do not forget to sign required modules with scripts/sign-file" - depends on MODULE_SIG_FORCE && !MODULE_SIG_ALL - -choice - prompt "Which hash algorithm should modules be signed with?" - depends on MODULE_SIG || IMA_APPRAISE_MODSIG - help - This determines which sort of hashing algorithm will be used during - signature generation. This algorithm _must_ be built into the kernel - directly so that signature verification can take place. It is not - possible to load a signed module containing the algorithm to check - the signature on that module. - -config MODULE_SIG_SHA1 - bool "Sign modules with SHA-1" - select CRYPTO_SHA1 - -config MODULE_SIG_SHA224 - bool "Sign modules with SHA-224" - select CRYPTO_SHA256 - -config MODULE_SIG_SHA256 - bool "Sign modules with SHA-256" - select CRYPTO_SHA256 - -config MODULE_SIG_SHA384 - bool "Sign modules with SHA-384" - select CRYPTO_SHA512 - -config MODULE_SIG_SHA512 - bool "Sign modules with SHA-512" - select CRYPTO_SHA512 - -endchoice - -config MODULE_SIG_HASH - string - depends on MODULE_SIG || IMA_APPRAISE_MODSIG - default "sha1" if MODULE_SIG_SHA1 - default "sha224" if MODULE_SIG_SHA224 - default "sha256" if MODULE_SIG_SHA256 - default "sha384" if MODULE_SIG_SHA384 - default "sha512" if MODULE_SIG_SHA512 - -choice - prompt "Module compression mode" - help - This option allows you to choose the algorithm which will be used to - compress modules when 'make modules_install' is run. (or, you can - choose to not compress modules at all.) - - External modules will also be compressed in the same way during the - installation. - - For modules inside an initrd or initramfs, it's more efficient to - compress the whole initrd or initramfs instead. - - This is fully compatible with signed modules. - - Please note that the tool used to load modules needs to support the - corresponding algorithm. module-init-tools MAY support gzip, and kmod - MAY support gzip, xz and zstd. - - Your build system needs to provide the appropriate compression tool - to compress the modules. - - If in doubt, select 'None'. - -config MODULE_COMPRESS_NONE - bool "None" - help - Do not compress modules. The installed modules are suffixed - with .ko. - -config MODULE_COMPRESS_GZIP - bool "GZIP" - help - Compress modules with GZIP. The installed modules are suffixed - with .ko.gz. - -config MODULE_COMPRESS_XZ - bool "XZ" - help - Compress modules with XZ. The installed modules are suffixed - with .ko.xz. - -config MODULE_COMPRESS_ZSTD - bool "ZSTD" - help - Compress modules with ZSTD. The installed modules are suffixed - with .ko.zst. - -endchoice - -config MODULE_DECOMPRESS - bool "Support in-kernel module decompression" - depends on MODULE_COMPRESS_GZIP || MODULE_COMPRESS_XZ - select ZLIB_INFLATE if MODULE_COMPRESS_GZIP - select XZ_DEC if MODULE_COMPRESS_XZ - help - - Support for decompressing kernel modules by the kernel itself - instead of relying on userspace to perform this task. Useful when - load pinning security policy is enabled. - - If unsure, say N. - -config MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS - bool "Allow loading of modules with missing namespace imports" - help - Symbols exported with EXPORT_SYMBOL_NS*() are considered exported in - a namespace. A module that makes use of a symbol exported with such a - namespace is required to import the namespace via MODULE_IMPORT_NS(). - There is no technical reason to enforce correct namespace imports, - but it creates consistency between symbols defining namespaces and - users importing namespaces they make use of. This option relaxes this - requirement and lifts the enforcement when loading a module. - - If unsure, say N. - -config MODPROBE_PATH - string "Path to modprobe binary" - default "/sbin/modprobe" - help - When kernel code requests a module, it does so by calling - the "modprobe" userspace utility. This option allows you to - set the path where that binary is found. This can be changed - at runtime via the sysctl file - /proc/sys/kernel/modprobe. Setting this to the empty string - removes the kernel's ability to request modules (but - userspace can still load modules explicitly). - -config TRIM_UNUSED_KSYMS - bool "Trim unused exported kernel symbols" if EXPERT - depends on !COMPILE_TEST - help - The kernel and some modules make many symbols available for - other modules to use via EXPORT_SYMBOL() and variants. Depending - on the set of modules being selected in your kernel configuration, - many of those exported symbols might never be used. - - This option allows for unused exported symbols to be dropped from - the build. In turn, this provides the compiler more opportunities - (especially when using LTO) for optimizing the code and reducing - binary size. This might have some security advantages as well. - - If unsure, or if you need to build out-of-tree modules, say N. - -config UNUSED_KSYMS_WHITELIST - string "Whitelist of symbols to keep in ksymtab" - depends on TRIM_UNUSED_KSYMS - help - By default, all unused exported symbols will be un-exported from the - build when TRIM_UNUSED_KSYMS is selected. - - UNUSED_KSYMS_WHITELIST allows to whitelist symbols that must be kept - exported at all times, even in absence of in-tree users. The value to - set here is the path to a text file containing the list of symbols, - one per line. The path can be absolute, or relative to the kernel - source tree. - -endif # MODULES - -config MODULES_TREE_LOOKUP - def_bool y - depends on PERF_EVENTS || TRACING || CFI_CLANG +source "kernel/module/Kconfig" config INIT_ALL_POSSIBLE bool diff --git a/kernel/module/Kconfig b/kernel/module/Kconfig new file mode 100644 index 000000000000..26ea5d04f56c --- /dev/null +++ b/kernel/module/Kconfig @@ -0,0 +1,293 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig MODULES + bool "Enable loadable module support" + modules + help + Kernel modules are small pieces of compiled code which can + be inserted in the running kernel, rather than being + permanently built into the kernel. You use the "modprobe" + tool to add (and sometimes remove) them. If you say Y here, + many parts of the kernel can be built as modules (by + answering M instead of Y where indicated): this is most + useful for infrequently used options which are not required + for booting. For more information, see the man pages for + modprobe, lsmod, modinfo, insmod and rmmod. + + If you say Y here, you will need to run "make + modules_install" to put the modules under /lib/modules/ + where modprobe can find them (you may need to be root to do + this). + + If unsure, say Y. + +if MODULES + +config MODULE_FORCE_LOAD + bool "Forced module loading" + default n + help + Allow loading of modules without version information (ie. modprobe + --force). Forced module loading sets the 'F' (forced) taint flag and + is usually a really bad idea. + +config MODULE_UNLOAD + bool "Module unloading" + help + Without this option you will not be able to unload any + modules (note that some modules may not be unloadable + anyway), which makes your kernel smaller, faster + and simpler. If unsure, say Y. + +config MODULE_FORCE_UNLOAD + bool "Forced module unloading" + depends on MODULE_UNLOAD + help + This option allows you to force a module to unload, even if the + kernel believes it is unsafe: the kernel will remove the module + without waiting for anyone to stop using it (using the -f option to + rmmod). This is mainly for kernel developers and desperate users. + If unsure, say N. + +config MODULE_UNLOAD_TAINT_TRACKING + bool "Tainted module unload tracking" + depends on MODULE_UNLOAD + default n + help + This option allows you to maintain a record of each unloaded + module that tainted the kernel. In addition to displaying a + list of linked (or loaded) modules e.g. on detection of a bad + page (see bad_page()), the aforementioned details are also + shown. If unsure, say N. + +config MODVERSIONS + bool "Module versioning support" + help + Usually, you have to use modules compiled with your kernel. + Saying Y here makes it sometimes possible to use modules + compiled for different kernels, by adding enough information + to the modules to (hopefully) spot any changes which would + make them incompatible with the kernel you are running. If + unsure, say N. + +config ASM_MODVERSIONS + bool + default HAVE_ASM_MODVERSIONS && MODVERSIONS + help + This enables module versioning for exported symbols also from + assembly. This can be enabled only when the target architecture + supports it. + +config MODULE_SRCVERSION_ALL + bool "Source checksum for all modules" + help + Modules which contain a MODULE_VERSION get an extra "srcversion" + field inserted into their modinfo section, which contains a + sum of the source files which made it. This helps maintainers + see exactly which source was used to build a module (since + others sometimes change the module source without updating + the version). With this option, such a "srcversion" field + will be created for all modules. If unsure, say N. + +config MODULE_SIG + bool "Module signature verification" + select MODULE_SIG_FORMAT + help + Check modules for valid signatures upon load: the signature + is simply appended to the module. For more information see + <file:Documentation/admin-guide/module-signing.rst>. + + Note that this option adds the OpenSSL development packages as a + kernel build dependency so that the signing tool can use its crypto + library. + + You should enable this option if you wish to use either + CONFIG_SECURITY_LOCKDOWN_LSM or lockdown functionality imposed via + another LSM - otherwise unsigned modules will be loadable regardless + of the lockdown policy. + + !!!WARNING!!! If you enable this option, you MUST make sure that the + module DOES NOT get stripped after being signed. This includes the + debuginfo strip done by some packagers (such as rpmbuild) and + inclusion into an initramfs that wants the module size reduced. + +config MODULE_SIG_FORCE + bool "Require modules to be validly signed" + depends on MODULE_SIG + help + Reject unsigned modules or signed modules for which we don't have a + key. Without this, such modules will simply taint the kernel. + +config MODULE_SIG_ALL + bool "Automatically sign all modules" + default y + depends on MODULE_SIG || IMA_APPRAISE_MODSIG + help + Sign all modules during make modules_install. Without this option, + modules must be signed manually, using the scripts/sign-file tool. + +comment "Do not forget to sign required modules with scripts/sign-file" + depends on MODULE_SIG_FORCE && !MODULE_SIG_ALL + +choice + prompt "Which hash algorithm should modules be signed with?" + depends on MODULE_SIG || IMA_APPRAISE_MODSIG + help + This determines which sort of hashing algorithm will be used during + signature generation. This algorithm _must_ be built into the kernel + directly so that signature verification can take place. It is not + possible to load a signed module containing the algorithm to check + the signature on that module. + +config MODULE_SIG_SHA1 + bool "Sign modules with SHA-1" + select CRYPTO_SHA1 + +config MODULE_SIG_SHA224 + bool "Sign modules with SHA-224" + select CRYPTO_SHA256 + +config MODULE_SIG_SHA256 + bool "Sign modules with SHA-256" + select CRYPTO_SHA256 + +config MODULE_SIG_SHA384 + bool "Sign modules with SHA-384" + select CRYPTO_SHA512 + +config MODULE_SIG_SHA512 + bool "Sign modules with SHA-512" + select CRYPTO_SHA512 + +endchoice + +config MODULE_SIG_HASH + string + depends on MODULE_SIG || IMA_APPRAISE_MODSIG + default "sha1" if MODULE_SIG_SHA1 + default "sha224" if MODULE_SIG_SHA224 + default "sha256" if MODULE_SIG_SHA256 + default "sha384" if MODULE_SIG_SHA384 + default "sha512" if MODULE_SIG_SHA512 + +choice + prompt "Module compression mode" + help + This option allows you to choose the algorithm which will be used to + compress modules when 'make modules_install' is run. (or, you can + choose to not compress modules at all.) + + External modules will also be compressed in the same way during the + installation. + + For modules inside an initrd or initramfs, it's more efficient to + compress the whole initrd or initramfs instead. + + This is fully compatible with signed modules. + + Please note that the tool used to load modules needs to support the + corresponding algorithm. module-init-tools MAY support gzip, and kmod + MAY support gzip, xz and zstd. + + Your build system needs to provide the appropriate compression tool + to compress the modules. + + If in doubt, select 'None'. + +config MODULE_COMPRESS_NONE + bool "None" + help + Do not compress modules. The installed modules are suffixed + with .ko. + +config MODULE_COMPRESS_GZIP + bool "GZIP" + help + Compress modules with GZIP. The installed modules are suffixed + with .ko.gz. + +config MODULE_COMPRESS_XZ + bool "XZ" + help + Compress modules with XZ. The installed modules are suffixed + with .ko.xz. + +config MODULE_COMPRESS_ZSTD + bool "ZSTD" + help + Compress modules with ZSTD. The installed modules are suffixed + with .ko.zst. + +endchoice + +config MODULE_DECOMPRESS + bool "Support in-kernel module decompression" + depends on MODULE_COMPRESS_GZIP || MODULE_COMPRESS_XZ + select ZLIB_INFLATE if MODULE_COMPRESS_GZIP + select XZ_DEC if MODULE_COMPRESS_XZ + help + + Support for decompressing kernel modules by the kernel itself + instead of relying on userspace to perform this task. Useful when + load pinning security policy is enabled. + + If unsure, say N. + +config MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS + bool "Allow loading of modules with missing namespace imports" + help + Symbols exported with EXPORT_SYMBOL_NS*() are considered exported in + a namespace. A module that makes use of a symbol exported with such a + namespace is required to import the namespace via MODULE_IMPORT_NS(). + There is no technical reason to enforce correct namespace imports, + but it creates consistency between symbols defining namespaces and + users importing namespaces they make use of. This option relaxes this + requirement and lifts the enforcement when loading a module. + + If unsure, say N. + +config MODPROBE_PATH + string "Path to modprobe binary" + default "/sbin/modprobe" + help + When kernel code requests a module, it does so by calling + the "modprobe" userspace utility. This option allows you to + set the path where that binary is found. This can be changed + at runtime via the sysctl file + /proc/sys/kernel/modprobe. Setting this to the empty string + removes the kernel's ability to request modules (but + userspace can still load modules explicitly). + +config TRIM_UNUSED_KSYMS + bool "Trim unused exported kernel symbols" if EXPERT + depends on !COMPILE_TEST + help + The kernel and some modules make many symbols available for + other modules to use via EXPORT_SYMBOL() and variants. Depending + on the set of modules being selected in your kernel configuration, + many of those exported symbols might never be used. + + This option allows for unused exported symbols to be dropped from + the build. In turn, this provides the compiler more opportunities + (especially when using LTO) for optimizing the code and reducing + binary size. This might have some security advantages as well. + + If unsure, or if you need to build out-of-tree modules, say N. + +config UNUSED_KSYMS_WHITELIST + string "Whitelist of symbols to keep in ksymtab" + depends on TRIM_UNUSED_KSYMS + help + By default, all unused exported symbols will be un-exported from the + build when TRIM_UNUSED_KSYMS is selected. + + UNUSED_KSYMS_WHITELIST allows to whitelist symbols that must be kept + exported at all times, even in absence of in-tree users. The value to + set here is the path to a text file containing the list of symbols, + one per line. The path can be absolute, or relative to the kernel + source tree. + +config MODULES_TREE_LOOKUP + def_bool y + depends on PERF_EVENTS || TRACING || CFI_CLANG + +endif # MODULES diff --git a/kernel/module/decompress.c b/kernel/module/decompress.c index 2fc7081dd7c1..4d0bcb3d9e44 100644 --- a/kernel/module/decompress.c +++ b/kernel/module/decompress.c @@ -119,10 +119,10 @@ static ssize_t module_gzip_decompress(struct load_info *info, goto out_inflate_end; } - s.next_out = kmap(page); + s.next_out = kmap_local_page(page); s.avail_out = PAGE_SIZE; rc = zlib_inflate(&s, 0); - kunmap(page); + kunmap_local(s.next_out); new_size += PAGE_SIZE - s.avail_out; } while (rc == Z_OK); @@ -178,11 +178,11 @@ static ssize_t module_xz_decompress(struct load_info *info, goto out; } - xz_buf.out = kmap(page); + xz_buf.out = kmap_local_page(page); xz_buf.out_pos = 0; xz_buf.out_size = PAGE_SIZE; xz_ret = xz_dec_run(xz_dec, &xz_buf); - kunmap(page); + kunmap_local(xz_buf.out); new_size += xz_buf.out_pos; } while (xz_buf.out_pos == PAGE_SIZE && xz_ret == XZ_OK); diff --git a/kernel/module/internal.h b/kernel/module/internal.h index ec104c2950c3..680d980a4fb2 100644 --- a/kernel/module/internal.h +++ b/kernel/module/internal.h @@ -103,7 +103,7 @@ struct module *find_module_all(const char *name, size_t len, bool even_unformed) int cmp_name(const void *name, const void *sym); long module_get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section); -char *module_flags(struct module *mod, char *buf); +char *module_flags(struct module *mod, char *buf, bool show_state); size_t module_flags_taint(unsigned long taints, char *buf); static inline void module_assert_mutex_or_preempt(void) diff --git a/kernel/module/kallsyms.c b/kernel/module/kallsyms.c index 77e75bead569..f5c5c9175333 100644 --- a/kernel/module/kallsyms.c +++ b/kernel/module/kallsyms.c @@ -457,26 +457,39 @@ unsigned long find_kallsyms_symbol_value(struct module *mod, const char *name) return 0; } -/* Look for this name: can be of form module:name. */ -unsigned long module_kallsyms_lookup_name(const char *name) +static unsigned long __module_kallsyms_lookup_name(const char *name) { struct module *mod; char *colon; - unsigned long ret = 0; + + colon = strnchr(name, MODULE_NAME_LEN, ':'); + if (colon) { + mod = find_module_all(name, colon - name, false); + if (mod) + return find_kallsyms_symbol_value(mod, colon + 1); + return 0; + } + + list_for_each_entry_rcu(mod, &modules, list) { + unsigned long ret; + + if (mod->state == MODULE_STATE_UNFORMED) + continue; + ret = find_kallsyms_symbol_value(mod, name); + if (ret) + return ret; + } + return 0; +} + +/* Look for this name: can be of form module:name. */ +unsigned long module_kallsyms_lookup_name(const char *name) +{ + unsigned long ret; /* Don't lock: we're in enough trouble already. */ preempt_disable(); - if ((colon = strnchr(name, MODULE_NAME_LEN, ':')) != NULL) { - if ((mod = find_module_all(name, colon - name, false)) != NULL) - ret = find_kallsyms_symbol_value(mod, colon + 1); - } else { - list_for_each_entry_rcu(mod, &modules, list) { - if (mod->state == MODULE_STATE_UNFORMED) - continue; - if ((ret = find_kallsyms_symbol_value(mod, name)) != 0) - break; - } - } + ret = __module_kallsyms_lookup_name(name); preempt_enable(); return ret; } diff --git a/kernel/module/main.c b/kernel/module/main.c index 57fc2821be63..6a477c622544 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -119,7 +119,7 @@ static void mod_update_bounds(struct module *mod) } /* Block module loading/unloading? */ -int modules_disabled = 0; +int modules_disabled; core_param(nomodule, modules_disabled, bint, 0); /* Waiting for a module to finish initializing? */ @@ -524,7 +524,10 @@ static struct module_attribute modinfo_##field = { \ MODINFO_ATTR(version); MODINFO_ATTR(srcversion); -static char last_unloaded_module[MODULE_NAME_LEN+1]; +static struct { + char name[MODULE_NAME_LEN + 1]; + char taints[MODULE_FLAGS_BUF_SIZE]; +} last_unloaded_module; #ifdef CONFIG_MODULE_UNLOAD @@ -694,6 +697,7 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user, { struct module *mod; char name[MODULE_NAME_LEN]; + char buf[MODULE_FLAGS_BUF_SIZE]; int ret, forced = 0; if (!capable(CAP_SYS_MODULE) || modules_disabled) @@ -753,8 +757,9 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user, async_synchronize_full(); - /* Store the name of the last unloaded module for diagnostic purposes */ - strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); + /* Store the name and taints of the last unloaded module for diagnostic purposes */ + strscpy(last_unloaded_module.name, mod->name, sizeof(last_unloaded_module.name)); + strscpy(last_unloaded_module.taints, module_flags(mod, buf, false), sizeof(last_unloaded_module.taints)); free_module(mod); /* someone could wait for the module in add_unformed_module() */ @@ -2151,7 +2156,7 @@ static int move_module(struct module *mod, struct load_info *info) #ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC /* Do the allocs. */ - ptr = vmalloc(mod->data_layout.size); + ptr = vzalloc(mod->data_layout.size); /* * The pointer to this block is stored in the module structure * which is inside the block. Just mark it as not being a @@ -2164,7 +2169,6 @@ static int move_module(struct module *mod, struct load_info *info) return -ENOMEM; } - memset(ptr, 0, mod->data_layout.size); mod->data_layout.base = ptr; #endif /* Transfer each section which specifies SHF_ALLOC */ @@ -2423,6 +2427,12 @@ static void do_free_init(struct work_struct *w) } } +#undef MODULE_PARAM_PREFIX +#define MODULE_PARAM_PREFIX "module." +/* Default value for module->async_probe_requested */ +static bool async_probe; +module_param(async_probe, bool, 0644); + /* * This is where the real work happens. * @@ -2643,7 +2653,8 @@ static int unknown_module_param_cb(char *param, char *val, const char *modname, int ret; if (strcmp(param, "async_probe") == 0) { - mod->async_probe_requested = true; + if (strtobool(val, &mod->async_probe_requested)) + mod->async_probe_requested = true; return 0; } @@ -2810,6 +2821,8 @@ static int load_module(struct load_info *info, const char __user *uargs, if (err) goto bug_cleanup; + mod->async_probe_requested = async_probe; + /* Module is ready to execute: parsing args may do that. */ after_dashes = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, -32768, 32767, mod, @@ -2984,24 +2997,27 @@ static void cfi_cleanup(struct module *mod) } /* Keep in sync with MODULE_FLAGS_BUF_SIZE !!! */ -char *module_flags(struct module *mod, char *buf) +char *module_flags(struct module *mod, char *buf, bool show_state) { int bx = 0; BUG_ON(mod->state == MODULE_STATE_UNFORMED); + if (!mod->taints && !show_state) + goto out; if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { buf[bx++] = '('; bx += module_flags_taint(mod->taints, buf + bx); /* Show a - for module-is-being-unloaded */ - if (mod->state == MODULE_STATE_GOING) + if (mod->state == MODULE_STATE_GOING && show_state) buf[bx++] = '-'; /* Show a + for module-is-being-loaded */ - if (mod->state == MODULE_STATE_COMING) + if (mod->state == MODULE_STATE_COMING && show_state) buf[bx++] = '+'; buf[bx++] = ')'; } +out: buf[bx] = '\0'; return buf; @@ -3134,12 +3150,13 @@ void print_modules(void) list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; - pr_cont(" %s%s", mod->name, module_flags(mod, buf)); + pr_cont(" %s%s", mod->name, module_flags(mod, buf, true)); } print_unloaded_tainted_modules(); preempt_enable(); - if (last_unloaded_module[0]) - pr_cont(" [last unloaded: %s]", last_unloaded_module); + if (last_unloaded_module.name[0]) + pr_cont(" [last unloaded: %s%s]", last_unloaded_module.name, + last_unloaded_module.taints); pr_cont("\n"); } diff --git a/kernel/module/procfs.c b/kernel/module/procfs.c index 9a8f4f0f6329..cf5b9f1e6ec4 100644 --- a/kernel/module/procfs.c +++ b/kernel/module/procfs.c @@ -91,7 +91,7 @@ static int m_show(struct seq_file *m, void *p) /* Taints info */ if (mod->taints) - seq_printf(m, " %s", module_flags(mod, buf)); + seq_printf(m, " %s", module_flags(mod, buf, true)); seq_puts(m, "\n"); return 0; diff --git a/scripts/coccinelle/api/alloc/zalloc-simple.cocci b/scripts/coccinelle/api/alloc/zalloc-simple.cocci index b3d0c3c230c1..d66c45356691 100644 --- a/scripts/coccinelle/api/alloc/zalloc-simple.cocci +++ b/scripts/coccinelle/api/alloc/zalloc-simple.cocci @@ -10,7 +10,7 @@ // Copyright: (C) 2009-2010 Julia Lawall, Nicolas Palix, DIKU. // Copyright: (C) 2009-2010 Gilles Muller, INRIA/LiP6. // Copyright: (C) 2017 Himanshu Jha -// URL: http://coccinelle.lip6.fr/rules/kzalloc.html +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --no-includes --include-headers // // Keywords: kmalloc, kzalloc diff --git a/scripts/coccinelle/api/atomic_as_refcounter.cocci b/scripts/coccinelle/api/atomic_as_refcounter.cocci index 0f78d94abc35..e63d52408b86 100644 --- a/scripts/coccinelle/api/atomic_as_refcounter.cocci +++ b/scripts/coccinelle/api/atomic_as_refcounter.cocci @@ -5,7 +5,7 @@ // Copyright (c) 2016-2017, Elena Reshetova, Intel Corporation // // Confidence: Moderate -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --include-headers --very-quiet virtual report diff --git a/scripts/coccinelle/api/check_bq27xxx_data.cocci b/scripts/coccinelle/api/check_bq27xxx_data.cocci index fae539ef0ce5..27366c6169ec 100644 --- a/scripts/coccinelle/api/check_bq27xxx_data.cocci +++ b/scripts/coccinelle/api/check_bq27xxx_data.cocci @@ -6,7 +6,7 @@ /// // Confidence: High // Copyright: (C) 2017 Julia Lawall, Inria/LIP6, -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Requires: 1.0.7 // Keywords: BQ27XXX_DATA diff --git a/scripts/coccinelle/api/d_find_alias.cocci b/scripts/coccinelle/api/d_find_alias.cocci index 47e050166f20..3489001378ab 100644 --- a/scripts/coccinelle/api/d_find_alias.cocci +++ b/scripts/coccinelle/api/d_find_alias.cocci @@ -4,7 +4,7 @@ // Keywords: d_find_alias, dput // // Confidence: Moderate -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --include-headers virtual context diff --git a/scripts/coccinelle/api/err_cast.cocci b/scripts/coccinelle/api/err_cast.cocci index 0e661c8d8d6f..7f9dc1212c74 100644 --- a/scripts/coccinelle/api/err_cast.cocci +++ b/scripts/coccinelle/api/err_cast.cocci @@ -6,7 +6,7 @@ // Copyright: (C) 2009, 2010 Nicolas Palix, DIKU. // Copyright: (C) 2009, 2010 Julia Lawall, DIKU. // Copyright: (C) 2009, 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: // // Keywords: ERR_PTR, PTR_ERR, ERR_CAST diff --git a/scripts/coccinelle/api/kstrdup.cocci b/scripts/coccinelle/api/kstrdup.cocci index 3c6dc5469ee4..8a61534676da 100644 --- a/scripts/coccinelle/api/kstrdup.cocci +++ b/scripts/coccinelle/api/kstrdup.cocci @@ -5,7 +5,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/api/memdup.cocci b/scripts/coccinelle/api/memdup.cocci index 30b15df734e5..d28741c69873 100644 --- a/scripts/coccinelle/api/memdup.cocci +++ b/scripts/coccinelle/api/memdup.cocci @@ -5,7 +5,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci index e01e95108405..03e7afa09eee 100644 --- a/scripts/coccinelle/api/memdup_user.cocci +++ b/scripts/coccinelle/api/memdup_user.cocci @@ -6,7 +6,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/api/pm_runtime.cocci b/scripts/coccinelle/api/pm_runtime.cocci index 1ccce3fd00b8..4b9778874453 100644 --- a/scripts/coccinelle/api/pm_runtime.cocci +++ b/scripts/coccinelle/api/pm_runtime.cocci @@ -4,7 +4,7 @@ // Keywords: pm_runtime // Confidence: Medium // Copyright (C) 2013 Texas Instruments Incorporated - -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --include-headers virtual patch diff --git a/scripts/coccinelle/api/resource_size.cocci b/scripts/coccinelle/api/resource_size.cocci index a9a571ac04ce..16857072d162 100644 --- a/scripts/coccinelle/api/resource_size.cocci +++ b/scripts/coccinelle/api/resource_size.cocci @@ -7,7 +7,7 @@ // Copyright: (C) 2009, 2010 Nicolas Palix, DIKU. // Copyright: (C) 2009, 2010 Julia Lawall, DIKU. // Copyright: (C) 2009, 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: // // Keywords: resource_size diff --git a/scripts/coccinelle/free/clk_put.cocci b/scripts/coccinelle/free/clk_put.cocci index 7237b49496f6..3c732cb7210b 100644 --- a/scripts/coccinelle/free/clk_put.cocci +++ b/scripts/coccinelle/free/clk_put.cocci @@ -8,7 +8,7 @@ // Confidence: Moderate // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: diff --git a/scripts/coccinelle/free/devm_free.cocci b/scripts/coccinelle/free/devm_free.cocci index da80050b91ff..0880729badbc 100644 --- a/scripts/coccinelle/free/devm_free.cocci +++ b/scripts/coccinelle/free/devm_free.cocci @@ -17,7 +17,7 @@ // Confidence: Moderate // Copyright: (C) 2011 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2011 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/free/ifnulldev_put.cocci b/scripts/coccinelle/free/ifnulldev_put.cocci new file mode 100644 index 000000000000..2bd2e8fae485 --- /dev/null +++ b/scripts/coccinelle/free/ifnulldev_put.cocci @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// Since commit b37a46683739 ("netdevice: add the case if dev is NULL"), +/// NULL check before dev_{put, hold} functions is not needed. +/// +/// Based on ifnullfree.cocci by Fabian Frederick. +/// +// Copyright: (C) 2022 Ziyang Xuan. +// Comments: - +// Options: --no-includes --include-headers +// Version min: 5.15 + +virtual patch +virtual org +virtual report +virtual context + +@r2 depends on patch@ +expression E; +@@ +- if (E != NULL) +( + __dev_put(E); +| + dev_put(E); +| + dev_put_track(E, ...); +| + __dev_hold(E); +| + dev_hold(E); +| + dev_hold_track(E, ...); +) + +@r depends on context || report || org @ +expression E; +position p; +@@ + +* if (E != NULL) +* \(__dev_put@p\|dev_put@p\|dev_put_track@p\|__dev_hold@p\|dev_hold@p\| +* dev_hold_track@p\)(E, ...); + +@script:python depends on org@ +p << r.p; +@@ + +cocci.print_main("NULL check before dev_{put, hold} functions is not needed", p) + +@script:python depends on report@ +p << r.p; +@@ + +msg = "WARNING: NULL check before dev_{put, hold} functions is not needed." +coccilib.report.print_report(p[0], msg) diff --git a/scripts/coccinelle/free/iounmap.cocci b/scripts/coccinelle/free/iounmap.cocci index 63b81d0c97b6..90d85fa7bfdf 100644 --- a/scripts/coccinelle/free/iounmap.cocci +++ b/scripts/coccinelle/free/iounmap.cocci @@ -8,7 +8,7 @@ // Confidence: Moderate // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: diff --git a/scripts/coccinelle/free/kfree.cocci b/scripts/coccinelle/free/kfree.cocci index 9b6e2037c2a9..6338bbac2f7f 100644 --- a/scripts/coccinelle/free/kfree.cocci +++ b/scripts/coccinelle/free/kfree.cocci @@ -9,7 +9,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/free/kfreeaddr.cocci b/scripts/coccinelle/free/kfreeaddr.cocci index 142af6337a04..85635a36f0ac 100644 --- a/scripts/coccinelle/free/kfreeaddr.cocci +++ b/scripts/coccinelle/free/kfreeaddr.cocci @@ -3,7 +3,7 @@ /// // Confidence: High // Copyright: (C) 2013 Julia Lawall, INRIA/LIP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/free/pci_free_consistent.cocci b/scripts/coccinelle/free/pci_free_consistent.cocci index d51e92556b42..e062b9ba09ff 100644 --- a/scripts/coccinelle/free/pci_free_consistent.cocci +++ b/scripts/coccinelle/free/pci_free_consistent.cocci @@ -3,7 +3,7 @@ /// // Confidence: Moderate // Copyright: (C) 2013 Petr Strnad. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Keywords: pci_free_consistent, pci_alloc_consistent // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/iterators/device_node_continue.cocci b/scripts/coccinelle/iterators/device_node_continue.cocci index f8cd14dfa604..5713c9cf59ff 100644 --- a/scripts/coccinelle/iterators/device_node_continue.cocci +++ b/scripts/coccinelle/iterators/device_node_continue.cocci @@ -4,7 +4,7 @@ /// // Confidence: High // Copyright: (C) 2015 Julia Lawall, Inria. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --no-includes --include-headers // Requires: 1.0.4 // Keywords: for_each_child_of_node, etc. diff --git a/scripts/coccinelle/iterators/for_each_child.cocci b/scripts/coccinelle/iterators/for_each_child.cocci index bc394615948e..2ea98a61a1f2 100644 --- a/scripts/coccinelle/iterators/for_each_child.cocci +++ b/scripts/coccinelle/iterators/for_each_child.cocci @@ -5,7 +5,7 @@ /// // Confidence: High // Copyright: (C) 2020 Sumera Priyadarsini -// URL: http://coccinelle.lip6.fr +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --no-includes --include-headers virtual patch diff --git a/scripts/coccinelle/iterators/itnull.cocci b/scripts/coccinelle/iterators/itnull.cocci index 9b362b98d7a1..7d34802f2724 100644 --- a/scripts/coccinelle/iterators/itnull.cocci +++ b/scripts/coccinelle/iterators/itnull.cocci @@ -10,7 +10,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/iterators/list_entry_update.cocci b/scripts/coccinelle/iterators/list_entry_update.cocci index d62e8a16085f..9a7593667da6 100644 --- a/scripts/coccinelle/iterators/list_entry_update.cocci +++ b/scripts/coccinelle/iterators/list_entry_update.cocci @@ -8,7 +8,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/iterators/use_after_iter.cocci b/scripts/coccinelle/iterators/use_after_iter.cocci index 676edd562eef..f67110ba7290 100644 --- a/scripts/coccinelle/iterators/use_after_iter.cocci +++ b/scripts/coccinelle/iterators/use_after_iter.cocci @@ -10,7 +10,7 @@ // Confidence: Moderate // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LIP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/locks/call_kern.cocci b/scripts/coccinelle/locks/call_kern.cocci index 5ca0d81b0015..3720f86d67c5 100644 --- a/scripts/coccinelle/locks/call_kern.cocci +++ b/scripts/coccinelle/locks/call_kern.cocci @@ -8,7 +8,7 @@ // Copyright: (C) 2012 Nicolas Palix. // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/locks/double_lock.cocci b/scripts/coccinelle/locks/double_lock.cocci index 9e88a578957c..619cfc714409 100644 --- a/scripts/coccinelle/locks/double_lock.cocci +++ b/scripts/coccinelle/locks/double_lock.cocci @@ -7,7 +7,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/locks/flags.cocci b/scripts/coccinelle/locks/flags.cocci index 7f990cd55f5a..44acf20a98dd 100644 --- a/scripts/coccinelle/locks/flags.cocci +++ b/scripts/coccinelle/locks/flags.cocci @@ -5,7 +5,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/locks/mini_lock.cocci b/scripts/coccinelle/locks/mini_lock.cocci index c3ad098f4a5b..71065d8a5d54 100644 --- a/scripts/coccinelle/locks/mini_lock.cocci +++ b/scripts/coccinelle/locks/mini_lock.cocci @@ -10,7 +10,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/boolreturn.cocci b/scripts/coccinelle/misc/boolreturn.cocci deleted file mode 100644 index 29d2bf41e95d..000000000000 --- a/scripts/coccinelle/misc/boolreturn.cocci +++ /dev/null @@ -1,59 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/// Return statements in functions returning bool should use -/// true/false instead of 1/0. -// -// Confidence: High -// Options: --no-includes --include-headers - -virtual patch -virtual report -virtual context - -@r1 depends on patch@ -identifier fn; -typedef bool; -symbol false; -symbol true; -@@ - -bool fn ( ... ) -{ -<... -return -( -- 0 -+ false -| -- 1 -+ true -) - ; -...> -} - -@r2 depends on report || context@ -identifier fn; -position p; -@@ - -bool fn ( ... ) -{ -<... -return -( -* 0@p -| -* 1@p -) - ; -...> -} - - -@script:python depends on report@ -p << r2.p; -fn << r2.fn; -@@ - -msg = "WARNING: return of 0/1 in function '%s' with return type bool" % fn -coccilib.report.print_report(p[0], msg) diff --git a/scripts/coccinelle/misc/cstptr.cocci b/scripts/coccinelle/misc/cstptr.cocci index c52e3c8ca9b3..74acf34bee03 100644 --- a/scripts/coccinelle/misc/cstptr.cocci +++ b/scripts/coccinelle/misc/cstptr.cocci @@ -5,7 +5,7 @@ // Confidence: High // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/doubleinit.cocci b/scripts/coccinelle/misc/doubleinit.cocci index 2f80d3ab38dd..7dbfde3f44e1 100644 --- a/scripts/coccinelle/misc/doubleinit.cocci +++ b/scripts/coccinelle/misc/doubleinit.cocci @@ -7,7 +7,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: requires at least Coccinelle 0.2.4, lex or parse error otherwise // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/ifcol.cocci b/scripts/coccinelle/misc/ifcol.cocci index da0351ed5740..442742467c18 100644 --- a/scripts/coccinelle/misc/ifcol.cocci +++ b/scripts/coccinelle/misc/ifcol.cocci @@ -12,7 +12,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/newline_in_nl_msg.cocci b/scripts/coccinelle/misc/newline_in_nl_msg.cocci index c175886e4015..9baffe55d917 100644 --- a/scripts/coccinelle/misc/newline_in_nl_msg.cocci +++ b/scripts/coccinelle/misc/newline_in_nl_msg.cocci @@ -5,7 +5,7 @@ /// // Confidence: Very High // Copyright: (C) 2020 Intel Corporation -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --no-includes --include-headers virtual context diff --git a/scripts/coccinelle/misc/noderef.cocci b/scripts/coccinelle/misc/noderef.cocci index 72de62a77a44..37ee7358d742 100644 --- a/scripts/coccinelle/misc/noderef.cocci +++ b/scripts/coccinelle/misc/noderef.cocci @@ -5,7 +5,7 @@ // Confidence: High // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/orplus.cocci b/scripts/coccinelle/misc/orplus.cocci index 52203dc2ca4b..3a1566f1aec9 100644 --- a/scripts/coccinelle/misc/orplus.cocci +++ b/scripts/coccinelle/misc/orplus.cocci @@ -6,7 +6,7 @@ // Confidence: Moderate // Copyright: (C) 2013 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2013 Gilles Muller, INRIA/LIP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/returnvar.cocci b/scripts/coccinelle/misc/returnvar.cocci index ce0d9eebc7e1..7ffc55bf51f9 100644 --- a/scripts/coccinelle/misc/returnvar.cocci +++ b/scripts/coccinelle/misc/returnvar.cocci @@ -4,7 +4,7 @@ /// // Confidence: Moderate // Copyright: (C) 2012 Peter Senna Tschudin, INRIA/LIP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: Comments on code can be deleted if near code that is removed. // "when strict" can be removed to get more hits, but adds false // positives diff --git a/scripts/coccinelle/misc/semicolon.cocci b/scripts/coccinelle/misc/semicolon.cocci index a53edb026dad..4476bf873deb 100644 --- a/scripts/coccinelle/misc/semicolon.cocci +++ b/scripts/coccinelle/misc/semicolon.cocci @@ -4,7 +4,7 @@ /// // Confidence: Moderate // Copyright: (C) 2012 Peter Senna Tschudin, INRIA/LIP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: Some false positives on empty default cases in switch statements. // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/misc/ifaddr.cocci b/scripts/coccinelle/misc/test_addr.cocci index fc92e8fcbfcb..d559b297476c 100644 --- a/scripts/coccinelle/misc/ifaddr.cocci +++ b/scripts/coccinelle/misc/test_addr.cocci @@ -4,7 +4,7 @@ // Confidence: High // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers @@ -14,12 +14,10 @@ virtual context @r@ expression x; -statement S1,S2; position p; @@ -*if@p (&x) - S1 else S2 +*\(&x@p == NULL \| &x@p != NULL\) @script:python depends on org@ p << r.p; diff --git a/scripts/coccinelle/misc/warn.cocci b/scripts/coccinelle/misc/warn.cocci index e379661e240d..b5f428035d03 100644 --- a/scripts/coccinelle/misc/warn.cocci +++ b/scripts/coccinelle/misc/warn.cocci @@ -4,7 +4,7 @@ // Confidence: High // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/null/badzero.cocci b/scripts/coccinelle/null/badzero.cocci index 882dd65313ab..35d443825c2a 100644 --- a/scripts/coccinelle/null/badzero.cocci +++ b/scripts/coccinelle/null/badzero.cocci @@ -10,7 +10,7 @@ // Confidence: High // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Requires: 1.0.0 // Options: diff --git a/scripts/coccinelle/null/deref_null.cocci b/scripts/coccinelle/null/deref_null.cocci index 98f1e7faf503..fdf098d4f522 100644 --- a/scripts/coccinelle/null/deref_null.cocci +++ b/scripts/coccinelle/null/deref_null.cocci @@ -7,7 +7,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: -I ... -all_includes can give more complete results // Options: diff --git a/scripts/coccinelle/null/eno.cocci b/scripts/coccinelle/null/eno.cocci index 81584ff87956..7107d6c8db9e 100644 --- a/scripts/coccinelle/null/eno.cocci +++ b/scripts/coccinelle/null/eno.cocci @@ -5,7 +5,7 @@ // Copyright: (C) 2010-2012 Nicolas Palix. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/null/kmerr.cocci b/scripts/coccinelle/null/kmerr.cocci index d0e004d4e130..68db20de62eb 100644 --- a/scripts/coccinelle/null/kmerr.cocci +++ b/scripts/coccinelle/null/kmerr.cocci @@ -9,7 +9,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/tests/doublebitand.cocci b/scripts/coccinelle/tests/doublebitand.cocci index 0f0b94e7debd..025436a15040 100644 --- a/scripts/coccinelle/tests/doublebitand.cocci +++ b/scripts/coccinelle/tests/doublebitand.cocci @@ -9,7 +9,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/tests/doubletest.cocci b/scripts/coccinelle/tests/doubletest.cocci index b35519cddb13..c3d94c31959f 100644 --- a/scripts/coccinelle/tests/doubletest.cocci +++ b/scripts/coccinelle/tests/doubletest.cocci @@ -8,7 +8,7 @@ // Copyright: (C) 2010 Nicolas Palix, DIKU. // Copyright: (C) 2010 Julia Lawall, DIKU. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Comments: // Options: --no-includes --include-headers diff --git a/scripts/coccinelle/tests/odd_ptr_err.cocci b/scripts/coccinelle/tests/odd_ptr_err.cocci index 11d4e2b6deb8..377436abe2d0 100644 --- a/scripts/coccinelle/tests/odd_ptr_err.cocci +++ b/scripts/coccinelle/tests/odd_ptr_err.cocci @@ -6,7 +6,7 @@ // Confidence: High // Copyright: (C) 2012, 2015 Julia Lawall, INRIA. // Copyright: (C) 2012, 2015 Gilles Muller, INRIA. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --no-includes --include-headers virtual patch diff --git a/scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci b/scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci index 91e286ace54c..5e188c62d8a9 100644 --- a/scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci +++ b/scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci @@ -13,7 +13,7 @@ /// // Confidence: Average // Copyright: (C) 2015 Andrzej Hajda, Samsung Electronics Co., Ltd. -// URL: http://coccinelle.lip6.fr/ +// URL: https://coccinelle.gitlabpages.inria.fr/website // Options: --all-includes virtual context diff --git a/scripts/module.lds.S b/scripts/module.lds.S index 1d0e1e4dc3d2..3a3aa2354ed8 100644 --- a/scripts/module.lds.S +++ b/scripts/module.lds.S @@ -27,6 +27,8 @@ SECTIONS { .ctors 0 : ALIGN(8) { *(SORT(.ctors.*)) *(.ctors) } .init_array 0 : ALIGN(8) { *(SORT(.init_array.*)) *(.init_array) } + .altinstructions 0 : ALIGN(8) { KEEP(*(.altinstructions)) } + __bug_table 0 : ALIGN(8) { KEEP(*(__bug_table)) } __jump_table 0 : ALIGN(8) { KEEP(*(__jump_table)) } __patchable_function_entries : { *(__patchable_function_entries) } |