| Age | Commit message (Collapse) | Author | Files | Lines |
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can_rx_offload_get_echo_skb_queue_timestamp()
Rename the rx_offload_get_echo_skb() function to
can_rx_offload_get_echo_skb_queue_timestamp(), since it inserts the
echo skb into the rx-offload queue sorted by timestamp.
This is a preparation for adding
can_rx_offload_get_echo_skb_queue_tail(), which adds the echo skb to
the end of the queue. This is intended for devices that do not support
timestamps.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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In gs_usb_disconnect(), all channels are destroyed first, then all
anchored RX URBs (parent->rx_submitted) are disposed with
usb_kill_anchored_urbs().
The call to usb_kill_anchored_urbs() is not needed, as
gs_destroy_candev() of the last active channel already disposes the RX
URBS.
Remove not needed call to usb_kill_anchored_urbs() from
gs_usb_disconnect().
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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In gs_destroy_candev(), the netdev is unregistered first, then all
anchored TX URBs (dev->tx_submitted) are disposed with
usb_kill_anchored_urbs().
The call to usb_kill_anchored_urbs() is not needed, as
unregister_candev() calls gs_can_close(), which already disposes the
TX URBS.
Remove not needed call to usb_kill_anchored_urbs() from
gs_destroy_candev().
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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ndo_stop
When the USB device is unplugged, gs_can_close() (which implements the
struct net_device_ops::ndo_stop callback) is called. In this function
an attempt is made to shut down the USB device with a USB control
message. For disconnected devices this will fail and a warning message
is printed.
Silence the driver by removing the printout of the error message if
the reset command fails.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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path
Remove unnecessary "out of memory" message from the error path of
gs_can_start_xmit() and gs_can_open().
Convert the printout in case of a failing usb_submit_urb() in
gs_can_open() from numbers to human readable error codes.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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in case of OOM
In case of an RX overflow error from the CAN controller and an OOM
where no skb can be allocated, the error counters are not incremented.
Fix this by first incrementing the error counters and then allocate
the skb.
Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices")
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Make use the previously assigned variable stats instead of using
netdev->stats.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Make use the previously assigned variable netdev instead of using
dev->netdev.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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To ease readability and maintainability uniformly use the variable
name "parent" for the struct gs_usb in the gs_usb driver.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Remove the return statements from void gs_usb_set_timestamp()
function, as it's not generally useful.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Indent block comment so that it aligns the * on each line.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Remove leading spaces from goto labels in accordance with the kernel
encoding style.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The controllers present in the D1 are extremely similar to the R40
and require the same reset quirks, but An extra quirk is needed to support
receiving packets.
Signed-off-by: John Watts <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The Allwinner D1's CAN controllers have the ACPC and ACPM registers
moved down. Compensate for this by adding an offset quirk for the
acceptance registers.
Signed-off-by: John Watts <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Remove unused/legacy peak_usb_netif_rx() function (not longer used
since commit 28e0a70cede3 ("can: peak_usb: CANFD: store 64-bits hw
timestamps").
Signed-off-by: Peter Seiderer <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Cross-merge networking fixes after downstream PR.
No conflicts or adjacent changes.
Signed-off-by: Jakub Kicinski <[email protected]>
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Cross-merge networking fixes after downstream PR.
No conflicts or adjacent changes.
Signed-off-by: Jakub Kicinski <[email protected]>
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After an initial link up the CAN device is in ERROR-ACTIVE mode. Due
to a missing CAN_STATE_STOPPED in gs_can_close() it doesn't change to
STOPPED after a link down:
| ip link set dev can0 up
| ip link set dev can0 down
| ip --details link show can0
| 13: can0: <NOARP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 10
| link/can promiscuity 0 allmulti 0 minmtu 0 maxmtu 0
| can state ERROR-ACTIVE restart-ms 1000
Add missing assignment of CAN_STATE_STOPPED in gs_can_close().
Cc: [email protected]
Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices")
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2023-07-19
The first 2 patches are by Judith Mendez, target the m_can driver and
add hrtimer based polling support for TI AM62x SoCs, where the
interrupt of the MCU domain's m_can cores is not routed to the Cortex
A53 core.
A patch by Rob Herring converts the grcan driver to use the correct DT
include files.
Michal Simek and Srinivas Neeli add support for optional reset control
to the xilinx_can driver.
The next 2 patches are by Jimmy Assarsson and add support for new
Kvaser pciefd to the kvaser_pciefd driver.
Mao Zhu's patch for the ucan driver removes a repeated word from a
comment.
* tag 'linux-can-next-for-6.6-20230719' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
can: ucan: Remove repeated word
can: kvaser_pciefd: Add support for new Kvaser pciefd devices
can: kvaser_pciefd: Move hardware specific constants and functions into a driver_data struct
can: Explicitly include correct DT includes
can: xilinx_can: Add support for controller reset
dt-bindings: can: xilinx_can: Add reset description
can: m_can: Add hrtimer to generate software interrupt
dt-bindings: net: can: Remove interrupt properties for MCAN
====================
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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Delete one of repeated word 'information' in comment.
Signed-off-by: Mao Zhu <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Add support for new Kvaser pciefd devices, based on SmartFusion2 SoC.
Signed-off-by: Jimmy Assarsson <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
[mkl: mark structs as static]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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driver_data struct
Move hardware specific address offsets, interrupt masks and DMA mapping
function, into struct kvaser_pciefd_driver_data, as a step towards adding
new devices based on different hardware.
Co-developed-by: Martin Jocic <[email protected]>
Signed-off-by: Martin Jocic <[email protected]>
Signed-off-by: Jimmy Assarsson <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
[mkl: mark structs as static]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Add support for an optional reset for the CAN controller using the reset
driver. If the CAN node contains the "resets" property, then this logic
will perform CAN controller reset.
Signed-off-by: Srinivas Neeli <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/all/ab7e6503aa3343e39ead03c1797e765be6c50de2.1689164442.git.michal.simek@amd.com
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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No need cast (void*) to (struct ems_pci_card *).
Signed-off-by: Wu Yunchuan <[email protected]>
Acked-by: Marc Kleine-Budde <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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The mcp251xfd controller needs an idle bus to enter 'Normal CAN 2.0
mode' or . The maximum length of a CAN frame is 736 bits (64 data
bytes, CAN-FD, EFF mode, worst case bit stuffing and interframe
spacing). For low bit rates like 10 kbit/s the arbitrarily chosen
MCP251XFD_POLL_TIMEOUT_US of 1 ms is too small.
Otherwise during polling for the CAN controller to enter 'Normal CAN
2.0 mode' the timeout limit is exceeded and the configuration fails
with:
| $ ip link set dev can1 up type can bitrate 10000
| [ 731.911072] mcp251xfd spi2.1 can1: Controller failed to enter mode CAN 2.0 Mode (6) and stays in Configuration Mode (4) (con=0x068b0760, osc=0x00000468).
| [ 731.927192] mcp251xfd spi2.1 can1: CRC read error at address 0x0e0c (length=4, data=00 00 00 00, CRC=0x0000) retrying.
| [ 731.938101] A link change request failed with some changes committed already. Interface can1 may have been left with an inconsistent configuration, please check.
| RTNETLINK answers: Connection timed out
Make MCP251XFD_POLL_TIMEOUT_US timeout calculation dynamic. Use
maximum of 1ms and bit time of 1 full 64 data bytes CAN-FD frame in
EFF mode, worst case bit stuffing and interframe spacing at the
current bit rate.
For easier backporting define the macro MCP251XFD_FRAME_LEN_MAX_BITS
that holds the max frame length in bits, which is 736. This can be
replaced by can_frame_bits(true, true, true, true, CANFD_MAX_DLEN) in
a cleanup patch later.
Fixes: 55e5b97f003e8 ("can: mcp25xxfd: add driver for Microchip MCP25xxFD SPI CAN")
Signed-off-by: Fedor Ross <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/all/20230717-mcp251xfd-fix-increase-poll-timeout-v5-1-06600f34c684@pengutronix.de
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Introduce timer polling method to MCAN since some SoCs may not
have M_CAN interrupt routed to A53 Linux and do not have
interrupt property in device tree M_CAN node.
On AM62x SoC, MCANs on MCU domain do not have hardware interrupt
routed to A53 Linux, instead they will use timer polling method.
Add an hrtimer to MCAN class device. Each MCAN will have its own
hrtimer instantiated if there is no hardware interrupt found in
device tree M_CAN node. The timer will generate a software
interrupt every 1 ms. In hrtimer callback, we check if there is
a transaction pending by reading a register, then process by
calling the isr if there is.
Tested-by: Hiago De Franco <[email protected]> # Toradex Verdin AM62
Reviewed-by: Tony Lindgren <[email protected]>
Signed-off-by: Judith Mendez <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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If the gs_usb device driver is unloaded (or unbound) before the
interface is shut down, the USB stack first calls the struct
usb_driver::disconnect and then the struct net_device_ops::ndo_stop
callback.
In gs_usb_disconnect() all pending bulk URBs are killed, i.e. no more
RX'ed CAN frames are send from the USB device to the host. Later in
gs_can_close() a reset control message is send to each CAN channel to
remove the controller from the CAN bus. In this race window the USB
device can still receive CAN frames from the bus and internally queue
them to be send to the host.
At least in the current version of the candlelight firmware, the queue
of received CAN frames is not emptied during the reset command. After
loading (or binding) the gs_usb driver, new URBs are submitted during
the struct net_device_ops::ndo_open callback and the candlelight
firmware starts sending its already queued CAN frames to the host.
However, this scenario was not considered when implementing the
hardware timestamp function. The cycle counter/time counter
infrastructure is set up (gs_usb_timestamp_init()) after the USBs are
submitted, resulting in a NULL pointer dereference if
timecounter_cyc2time() (via the call chain:
gs_usb_receive_bulk_callback() -> gs_usb_set_timestamp() ->
gs_usb_skb_set_timestamp()) is called too early.
Move the gs_usb_timestamp_init() function before the URBs are
submitted to fix this problem.
For a comprehensive solution, we need to consider gs_usb devices with
more than 1 channel. The cycle counter/time counter infrastructure is
setup per channel, but the RX URBs are per device. Once gs_can_open()
of _a_ channel has been called, and URBs have been submitted, the
gs_usb_receive_bulk_callback() can be called for _all_ available
channels, even for channels that are not running, yet. As cycle
counter/time counter has not set up, this will again lead to a NULL
pointer dereference.
Convert the cycle counter/time counter from a "per channel" to a "per
device" functionality. Also set it up, before submitting any URBs to
the device.
Further in gs_usb_receive_bulk_callback(), don't process any URBs for
not started CAN channels, only resubmit the URB.
Fixes: 45dfa45f52e6 ("can: gs_usb: add RX and TX hardware timestamp support")
Closes: https://github.com/candle-usb/candleLight_fw/issues/137#issuecomment-1623532076
Cc: [email protected]
Cc: John Whittington <[email protected]>
Link: https://lore.kernel.org/all/20230716-gs_usb-fix-time-stamp-counter-v1-2-9017cefcd9d5@pengutronix.de
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The gs_usb driver handles USB devices with more than 1 CAN channel.
The RX path for all channels share the same bulk endpoint (the
transmitted bulk data encodes the channel number). These per-device
resources are allocated and submitted by the first opened channel.
During this allocation, the resources are either released immediately
in case of a failure or the URBs are anchored. All anchored URBs are
finally killed with gs_usb_disconnect().
Currently, gs_can_open() returns with an error if the allocation of a
URB or a buffer fails. However, if usb_submit_urb() fails, the driver
continues with the URBs submitted so far, even if no URBs were
successfully submitted.
Treat every error as fatal and free all allocated resources
immediately.
Switch to goto-style error handling, to prepare the driver for more
per-device resource allocation.
Cc: [email protected]
Cc: John Whittington <[email protected]>
Link: https://lore.kernel.org/all/20230716-gs_usb-fix-time-stamp-counter-v1-1-9017cefcd9d5@pengutronix.de
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Use the TX FIFO size read from CAN controller register, instead of using
hard coded value.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Refactor code;
- Format code
- Rename variables and macros
- Remove intermediate variables
- Add/remove blank lines
- Reduce scope of variables
- Add helper functions
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Add support for the Classical CAN raw DLC functionality to send and receive
DLC values from 9 .. 15.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Replace opencoded masking and shifting, with GENMASK, FIELD_GET and
FIELD_PREP macros.
Suggested-by: Vincent MAILHOL <[email protected]>
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Sort the registers defines, in the same order as the register bits/fields
are defined.
Sort register bits/fields in MSB-to-LSB order.
Update and add comments.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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kvaser_pciefd_{receive,transmit,set_tx}_irq()
Change return type to void for kvaser_pciefd_transmit_irq(),
kvaser_pciefd_receive_irq() and kvaser_pciefd_set_tx_irq().
These functions always return zero.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Rename device ID defines to better match the product name of the supported
device.
Use 16 bit hexadecimal values for device IDs.
And format kvaser_pciefd_id_table using clang-format.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Sort the includes in alphabetic order.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Remove SPI flash parameter read functionality, since it's only used for
reading the interface CAN controller count.
This information is already read from a register, making the information
redundant.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Define unsigned constants with type suffix 'U'
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Set hardware timestamp on transmitted packets.
Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Add new function, kvaser_pciefd_set_skb_timestamp(), to set skb hwtstamps.
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The Kvaser KCAN controller got a feature to send error frames on request.
The packet KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK signals that the requested
error frame was transmitted.
Since this feature is not supported by the driver, drop the handler and add
KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK to the list of unexpected packet types.
Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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The PCI interrupt register, KVASER_PCIEFD_IRQ_REG, is level triggered.
Writing to the register doesn't affect it.
Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Signed-off-by: Jimmy Assarsson <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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Introduce a method to calculate the exact size in bits of a CAN(-FD)
frame with or without dynamic bitstuffing.
These are all the possible combinations taken into account:
- Classical CAN or CAN-FD
- Standard or Extended frame format
- CAN-FD CRC17 or CRC21
- Include or not intermission
Instead of doing several individual macro definitions, declare the
can_frame_bits() function-like macro. To this extent, do a full
refactoring of the length definitions.
In addition add the can_frame_bytes(). This function-like macro
replaces the existing macro:
- CAN_FRAME_OVERHEAD_SFF: can_frame_bytes(false, false, 0)
- CAN_FRAME_OVERHEAD_EFF: can_frame_bytes(false, true, 0)
- CANFD_FRAME_OVERHEAD_SFF: can_frame_bytes(true, false, 0)
- CANFD_FRAME_OVERHEAD_EFF: can_frame_bytes(true, true, 0)
Function-like macros were chosen over inline functions because they
can be used to initialize const struct fields.
The different maximum frame lengths (maximum data length, including
intermission) are as follow:
Frame type bits bytes
-------------------------------------------------------
Classic CAN SFF no bitstuffing 111 14
Classic CAN EFF no bitstuffing 131 17
Classic CAN SFF bitstuffing 135 17
Classic CAN EFF bitstuffing 160 20
CAN-FD SFF no bitstuffing 579 73
CAN-FD EFF no bitstuffing 598 75
CAN-FD SFF bitstuffing 712 89
CAN-FD EFF bitstuffing 736 92
The macro CAN_FRAME_LEN_MAX and CANFD_FRAME_LEN_MAX are kept as an
alias to, respectively, can_frame_bytes(false, true, CAN_MAX_DLEN) and
can_frame_bytes(true, true, CANFD_MAX_DLEN).
In addition to the above:
- Use ISO 11898-1:2015 definitions for the names of the CAN frame
fields.
- Include linux/bits.h for use of BITS_PER_BYTE.
- Include linux/math.h for use of mult_frac() and
DIV_ROUND_UP(). N.B: the use of DIV_ROUND_UP() is not new to this
patch, but the include was previously omitted.
- Add copyright 2023 for myself.
Suggested-by: Thomas Kopp <[email protected]>
Signed-off-by: Vincent Mailhol <[email protected]>
Reviewed-by: Thomas Kopp <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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This patch aligns code to match open parenthesis.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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This patch aligns code to match open parenthesis.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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This patch aligns code to match open parenthesis and removes a
trailing whitespace.
Fixes: eb38c2053b67 ("can: rx-offload: rename can_rx_offload_queue_sorted() -> can_rx_offload_queue_timestamp()")
Fixes: f5071d9e729d ("can: m_can: m_can_handle_bus_errors(): add support for handling DLEC error on CAN-FD frames")
Reported-by: Judith Mendez <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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In their RZN1 SoC, Renesas put a CAN controller supposed to act very
similarly to the original Philips sja1000. In practice, while flooding
the bus with another device, we discovered that the controller very
often after an overrun situation would just refuse any new frame, drop
them all and trigger over and over again the overrun interrupt, even
though the buffer would have been totally emptied. The controller acts
like if its internal buffer offsets (where it writes and where the host
reads) where totally screwed-up.
Renesas manual mentions a single action to perform in order to
resynchronize the read and write offsets within the buffer: performing
a soft reset.
Performing a soft reset takes a bit of time and involves small delays,
so better do that in a threaded handler rather than inside the hard IRQ
handler.
Add platform data to recognize the platforms which need this workaround,
and when the faulty situation is diagnosed, stop what is being
performed and request the threaded handler to be executed in order to
perform the reset.
Tested-by: Jérémie Dautheribes <[email protected]> # 5.10
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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In order to support a flavor of the sja1000 which sometimes freezes, it
will be needed upon certain interrupts to perform a soft reset. The soft
reset operation takes a bit of time, so better not do it within the hard
interrupt handler but rather in a threaded handler. Let's prepare the
possibility for sja1000_err() to request "interrupting" the current flow
and request the threaded handler to be run while keeping the interrupt
line low.
There is no functional change.
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>
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