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2013-09-13Remove GENERIC_HARDIRQ config optionMartin Schwidefsky1-12/+0
After the last architecture switched to generic hard irqs the config options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code for !CONFIG_GENERIC_HARDIRQS can be removed. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-07-13Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: - core fix for missing round up in the generic irq chip implementation - new irq chip for MOXA SoCs - a few fixes and cleanups in the irqchip drivers * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip: Add support for MOXA ART SoCs genirq: generic chip: Use DIV_ROUND_UP to calculate numchips irqchip: nvic: Fix wrong num_ct argument for irq_alloc_domain_generic_chips() irqchip: sun4i: Staticize sun4i_irq_ack() irqchip: vt8500: Staticize local symbols
2013-07-13Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds1-12/+0
Pull MIPS updates from Ralf Baechle: "MIPS updates: - All the things that didn't make 3.10. - Removes the Windriver PPMC platform. Nobody will miss it. - Remove a workaround from kernel/irq/irqdomain.c which was there exclusivly for MIPS. Patch by Grant Likely. - More small improvments for the SEAD 3 platform - Improvments on the BMIPS / SMP support for the BCM63xx series. - Various cleanups of dead leftovers. - Platform support for the Cavium Octeon-based EdgeRouter Lite. Two large KVM patchsets didn't make it for this pull request because their respective authors are vacationing" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (124 commits) MIPS: Kconfig: Add missing MODULES dependency to VPE_LOADER MIPS: BCM63xx: CLK: Add dummy clk_{set,round}_rate() functions MIPS: SEAD3: Disable L2 cache on SEAD-3. MIPS: BCM63xx: Enable second core SMP on BCM6328 if available MIPS: BCM63xx: Add SMP support to prom.c MIPS: define write{b,w,l,q}_relaxed MIPS: Expose missing pci_io{map,unmap} declarations MIPS: Malta: Update GCMP detection. Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET" MIPS: APSP: Remove <asm/kspd.h> SSB: Kconfig: Amend SSB_EMBEDDED dependencies MIPS: microMIPS: Fix improper definition of ISA exception bit. MIPS: Don't try to decode microMIPS branch instructions where they cannot exist. MIPS: Declare emulate_load_store_microMIPS as a static function. MIPS: Fix typos and cleanup comment MIPS: Cleanup indentation and whitespace MIPS: BMIPS: support booting from physical CPU other than 0 MIPS: Only set cpu_has_mmips if SYS_SUPPORTS_MICROMIPS MIPS: GIC: Fix gic_set_affinity infinite loop MIPS: Don't save/restore OCTEON wide multiplier state on syscalls. ...
2013-07-06Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds3-401/+186
Pull irqdomain refactoring from Grant Likely: "This is the long awaited simplification of irqdomain. It gets rid of the different types of irq domains and instead both linear and tree mappings can be supported in a single domain. Doing this removes a lot of special case code and makes irq domains simpler to understand overall" * tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux: irq: fix checkpatch error irqdomain: Include hwirq number in /proc/interrupts irqdomain: make irq_linear_revmap() a fast path again irqdomain: remove irq_domain_generate_simple() irqdomain: Refactor irq_domain_associate_many() irqdomain: Beef up debugfs output irqdomain: Clean up aftermath of irq_domain refactoring irqdomain: Eliminate revmap type irqdomain: merge linear and tree reverse mappings. irqdomain: Add a name field irqdomain: Replace LEGACY mapping with LINEAR irqdomain: Relax failure path on setting up mappings
2013-07-05genirq: generic chip: Use DIV_ROUND_UP to calculate numchipsAxel Lin1-1/+1
The number of interrupts in a domain may be not divisible by the number of interrupts each chip handles. Integer division may truncate the result, thus use DIV_ROUND_UP to count numchips. Seems all users of irq_alloc_domain_generic_chips() in current code do not have this issue. I just found the issue while reading the code. Signed-off-by: Axel Lin <[email protected]> Cc: Grant Likely <[email protected]> Cc: Tony Lindgren <[email protected]> Cc: Arnd Bergmann <[email protected]> Link: http://lkml.kernel.org/r/1373015592.18252.2.camel@phoenix Signed-off-by: Thomas Gleixner <[email protected]>
2013-07-04Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree updates from Jiri Kosina: "The usual stuff from trivial tree" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits) treewide: relase -> release Documentation/cgroups/memory.txt: fix stat file documentation sysctl/net.txt: delete reference to obsolete 2.4.x kernel spinlock_api_smp.h: fix preprocessor comments treewide: Fix typo in printk doc: device tree: clarify stuff in usage-model.txt. open firmware: "/aliasas" -> "/aliases" md: bcache: Fixed a typo with the word 'arithmetic' irq/generic-chip: fix a few kernel-doc entries frv: Convert use of typedef ctl_table to struct ctl_table sgi: xpc: Convert use of typedef ctl_table to struct ctl_table doc: clk: Fix incorrect wording Documentation/arm/IXP4xx fix a typo Documentation/networking/ieee802154 fix a typo Documentation/DocBook/media/v4l fix a typo Documentation/video4linux/si476x.txt fix a typo Documentation/virtual/kvm/api.txt fix a typo Documentation/early-userspace/README fix a typo Documentation/video4linux/soc-camera.txt fix a typo lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment ...
2013-07-02Merge branch 'irq-core-for-linus' of ↵Linus Torvalds4-62/+290
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core irq changes from Ingo Molnar: "The main changes: - generic-irqchip driver additions, cleanups and fixes - 3 new irqchip drivers: ARMv7-M NVIC, TB10x and Marvell Orion SoCs - irq_get_trigger_type() simplification and cross-arch cleanup - various cleanups, simplifications - documentation updates" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits) softirq: Use _RET_IP_ genirq: Add the generic chip to the genirq docbook genirq: generic-chip: Export some irq_gc_ functions genirq: Fix can_request_irq() for IRQs without an action irqchip: exynos-combiner: Staticize combiner_init irqchip: Add support for ARMv7-M NVIC irqchip: Add TB10x interrupt controller driver irqdomain: Use irq_get_trigger_type() to get IRQ flags MIPS: octeon: Use irq_get_trigger_type() to get IRQ flags arm: orion: Use irq_get_trigger_type() to get IRQ flags mfd: stmpe: use irq_get_trigger_type() to get IRQ flags mfd: twl4030-irq: Use irq_get_trigger_type() to get IRQ flags gpio: mvebu: Use irq_get_trigger_type() to get IRQ flags genirq: Add irq_get_trigger_type() to get IRQ flags genirq: Irqchip: document gcflags arg of irq_alloc_domain_generic_chips genirq: Set irq thread to RT priority on creation irqchip: Add support for Marvell Orion SoCs genirq: Add kerneldoc for irq_disable. genirq: irqchip: Add mask to block out invalid irqs genirq: Generic chip: Add linear irq domain support ...
2013-06-28genirq: Add the generic chip to the genirq docbookThomas Gleixner1-5/+6
Signed-off-by: Thomas Gleixner <[email protected]> Cc: Randy Dunlap <[email protected]>
2013-06-28genirq: generic-chip: Export some irq_gc_ functionsFabio Estevam1-0/+3
When building imx_v6_v7_defconfig with imx-drm drivers selected as modules, we get the following build errors: ERROR: "irq_gc_mask_clr_bit" [drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.ko] undefined! ERROR: "irq_gc_mask_set_bit" [drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.ko] undefined! ERROR: "irq_gc_ack_set_bit" [drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.ko] undefined! Export the required functions to avoid this problem. Signed-off-by: Fabio Estevam <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-06-28genirq: Fix can_request_irq() for IRQs without an actionBen Hutchings1-3/+3
Commit 02725e7471b8 ('genirq: Use irq_get/put functions'), inadvertently changed can_request_irq() to return 0 for IRQs that have no action. This causes pcibios_lookup_irq() to select only IRQs that already have an action with IRQF_SHARED set, or to fail if there are none. Change can_request_irq() to return 1 for IRQs that have no action (if the first two conditions are met). Reported-by: Bjarni Ingi Gislason <[email protected]> Tested-by: Bjarni Ingi Gislason <[email protected]> (against 3.2) Signed-off-by: Ben Hutchings <[email protected]> Cc: [email protected] Cc: [email protected] # 2.6.39+ Link: http://bugs.debian.org/709647 Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-06-25irqdomain: Use irq_get_trigger_type() to get IRQ flagsJavier Martinez Canillas1-1/+1
Use irq_get_trigger_type() to get the IRQ trigger type flags instead calling irqd_get_trigger_type(irq_desc_get_irq_data(virq)) Signed-off-by: Javier Martinez Canillas <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Linus Walleij <[email protected]> Cc: Samuel Ortiz <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Russell King <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/1371228049-27080-8-git-send-email-javier.martinez@collabora.co.uk Signed-off-by: Thomas Gleixner <[email protected]>
2013-06-24genirq: Irqchip: document gcflags arg of irq_alloc_domain_generic_chipsJames Hogan1-0/+1
Commit 088f40b7b027dad6519712ff224a5798dd62a204 ("genirq: Generic chip: Add linear irq domain support") missed kerneldoc for the gcflags argument of irq_alloc_domain_generic_chips(). Add it now. Signed-off-by: James Hogan <[email protected]> Acked-by: Grant Likely <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-06-24irq: fix checkpatch errorKefeng Wang1-5/+3
ERROR: space required before the open parenthesis '(' WARNING: Prefer pr_warn(... to pr_warning(... Just fix above 2 issue. Signed-off-by: Kefeng Wang <[email protected]> Signed-off-by: Grant Likely <[email protected]>
2013-06-24irqdomain: Include hwirq number in /proc/interruptsGrant Likely1-0/+2
Add the hardware interrupt number to the output of /proc/interrupts. It is often important to have access to the hardware interrupt number because it identifies exactly how an interrupt signal is wired up to the interrupt controller. This is especially important when using irq_domains since irq numbers get dynamically allocated in that case, and have no relation to the actual hardware number. Note: This output is currently conditional on whether or not the irq_domain pointer is set; however hwirq could still be used without irq_domain. It may be worthwhile to always output the hwirq number regardless of the domain pointer. Signed-off-by: Grant Likely <[email protected]> Tested-by: Olof Johansson <[email protected]> Cc: Ben Herrenschmidt <[email protected]> Cc: Thomas Gleixner <[email protected]>
2013-06-24irqdomain: make irq_linear_revmap() a fast path againGrant Likely1-26/+8
Over the years, irq_linear_revmap() gained tests and checks to make sure callers were using it safely, which while important, also make it less of a fast path. After the irqdomain refactoring done recently, it is now possible to make irq_linear_revmap() a fast path again. This patch moves irq_linear_revmap() to the header file and makes it a static inline so that interrupt controller drivers using a linear mapping can decode the virq from a hwirq in just a couple of instructions. Signed-off-by: Grant Likely <[email protected]>
2013-06-24irqdomain: remove irq_domain_generate_simple()Grant Likely1-15/+0
Nobody calls it; remove the function Signed-off-by: Grant Likely <[email protected]>
2013-06-24irqdomain: Refactor irq_domain_associate_many()Grant Likely1-94/+91
Originally, irq_domain_associate_many() was designed to unwind the mapped irqs on a failure of any individual association. However, that proved to be a problem with certain IRQ controllers. Some of them only support a subset of irqs, and will fail when attempting to map a reserved IRQ. In those cases we want to map as many IRQs as possible, so instead it is better for irq_domain_associate_many() to make a best-effort attempt to map irqs, but not fail if any or all of them don't succeed. If a caller really cares about how many irqs got associated, then it should instead go back and check that all of the irqs is cares about were mapped. The original design open-coded the individual association code into the body of irq_domain_associate_many(), but with no longer needing to unwind associations, the code becomes simpler to split out irq_domain_associate() to contain the bulk of the logic, and irq_domain_associate_many() to be a simple loop wrapper. This patch also adds a new error check to the associate path to make sure it isn't called for an irq larger than the controller can handle, and adds locking so that the irq_domain_mutex is held while setting up a new association. v3: Fixup missing change to irq_domain_add_tree() v2: Fixup x86 warning. irq_domain_associate_many() no longer returns an error code, but reports errors to the printk log directly. In the majority of cases we don't actually want to fail if there is a problem, but rather log it and still try to boot the system. Signed-off-by: Grant Likely <[email protected]> irqdomain: Fix flubbed irq_domain_associate_many refactoring commit d39046ec72, "irqdomain: Refactor irq_domain_associate_many()" was missing the following hunk which causes a boot failure on anything using irq_domain_add_tree() to allocate an irq domain. Signed-off-by: Grant Likely <[email protected]> Cc: Michael Neuling <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]>, Cc: Thomas Gleixner <[email protected]>, Cc: Stephen Rothwell <[email protected]>
2013-06-18irq/generic-chip: fix a few kernel-doc entriesUwe Kleine-König1-3/+3
Signed-off-by: Uwe Kleine-König <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2013-06-18irqdomain: Remove temporary MIPS workaround codeGrant Likely1-12/+0
The MIPS interrupt controllers are all registering their own irq_domains now. Drop the MIPS specific code because it is no longer needed. Signed-off-by: Grant Likely <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/5458/ Signed-off-by: Ralf Baechle <[email protected]>
2013-06-11genirq: Set irq thread to RT priority on creationIvo Sieben1-5/+6
When a threaded irq handler is installed the irq thread is initially created on normal scheduling priority. Only after the irq thread is woken up it sets its priority to RT_FIFO MAX_USER_RT_PRIO/2 itself. This means that interrupts that occur directly after the irq handler is installed will be handled on a normal scheduling priority instead of the realtime priority that one would expect. Fix this by setting the RT priority on creation of the irq_thread. Signed-off-by: Ivo Sieben <[email protected]> Cc: Sebastian Andrzej Siewior <[email protected]> Cc: Steven Rostedt <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-06-10irqdomain: Beef up debugfs outputGrant Likely1-5/+30
This patch increases the amount of output produced by the irq_domain_mapping debugfs file by first listing all of the registered irq domains at the beginning of the output, and then by including all mapped IRQs in the output, not just the active ones. It is very useful when debugging irqdomain issues to be able to see the entire list of mapped irqs, not just the ones that happen to be connected to devices. Signed-off-by: Grant Likely <[email protected]>
2013-06-10irqdomain: Clean up aftermath of irq_domain refactoringGrant Likely1-91/+36
After refactoring the irqdomain code, there are a number of API functions that are merely empty wrappers around core code. Drop those wrappers out of the C file and replace them with static inlines in the header. Signed-off-by: Grant Likely <[email protected]>
2013-06-10irqdomain: Eliminate revmap typeGrant Likely2-37/+23
The NOMAP irq_domain type is only used by a handful of interrupt controllers and it unnecessarily complicates the code by adding special cases on how to look up mappings and different revmap functions are used for each type which need to validate the correct type is passed to it before performing the reverse map. Eliminating the revmap_type and making a single reverse mapping function simplifies the code. It also shouldn't be any slower than having separate revmap functions because the type of the revmap needed to be checked anyway. The linear and tree revmap types were already merged in a previous patch. This patch rolls the NOMAP or direct mapping behaviour into the same domain code making is possible for an irq domain to do any mapping type; linear, tree or direct; and that the mapping will be transparent to the interrupt controller driver. With this change, direct mappings will get stored in the linear or tree mapping for consistency. Reverse mapping from the hwirq to virq will go through the normal lookup process. However, any controller using a direct mapping can take advantage of knowing that hwirq==virq for any mapped interrupts skip doing a revmap lookup when handling IRQs. Signed-off-by: Grant Likely <[email protected]>
2013-06-10irqdomain: merge linear and tree reverse mappings.Grant Likely1-78/+29
Keeping them separate makes irq_domain more complex and adds a lot of code (as proven by the diffstat). Merging them simplifies the whole scheme. This change makes it so both the tree and linear methods can be used by the same irq_domain instance. If the hwirq is less than the ->linear_size, then the linear map is used to reverse map the hwirq. Otherwise the radix tree is used. The test for which map to use is no more expensive that the existing code, so the performance of fast path is preserved. It also means that complex interrupt controllers can use both the linear map and a tree in the same domain. This may be useful for an interrupt controller with a base set of core irqs and a large number of GPIOs which might be used as irqs. The linear map could cover the core irqs, and the tree used for thas irqs. The linear map could cover the core irqs, and the tree used for the gpios. v2: Drop reorganization of revmap data Signed-off-by: Grant Likely <[email protected]> Cc: Paul Mundt <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Rob Herring <[email protected]>
2013-06-10irqdomain: Add a name fieldGrant Likely2-13/+7
This patch adds a name field to the irq_domain structure to help mere mortals understand the mappings between irq domains and virqs. It also converts a number of places that have open-coded some kind of fudging an irqdomain name to use the new field. This means a more consistent display of names in irq domain log messages and debugfs output. Signed-off-by: Grant Likely <[email protected]>
2013-06-10irqdomain: Replace LEGACY mapping with LINEARGrant Likely1-78/+6
The LEGACY mapping unnecessarily complicates the irqdomain code and can easily be implemented with a linear mapping. By ripping it out and replacing it with the LINEAR mapping the object size of irqdomain.c shrinks by about 330 bytes (ARMv7) which offsets the additional allocation required by the linear map. It also makes it possible for current LEGACY map users to pre-allocate irq_descs for a subset of the hwirqs and dynamically allocate the rest as needed. Signed-off-by: Grant Likely <[email protected]> Cc: Paul Mundt <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Rob Herring <[email protected]>
2013-06-10irqdomain: Relax failure path on setting up mappingsGrant Likely1-12/+4
Commit 98aa468e, "irqdomain: Support for static IRQ mapping and association" introduced an API for directly associating blocks of hwirqs to linux irqs. However, if any irq in that block failed to map (say if the mapping functions returns an error because the irq is already mapped) then the whole thing will fail and roll back. This is probably too aggressive since there are valid reasons why a mapping may fail. ie. Firmware may have a particular IRQ marked as unusable. This patch drops the error path out of irq_domain_associate(). If a mapping fails, then it is simply skipped. There is no reason to fail the entire allocation. v2: Still output an information message on failed mappings and make sure attempted mapping gets cleared out of the irq_data structure. Signed-off-by: Grant Likely <[email protected]> Cc: Paul Mundt <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Thomas Gleixner <[email protected]>
2013-06-10Merge remote-tracking branch 'tip/irq/for-arm' into irqdomain/nextGrant Likely2-49/+258
2013-06-08irqdomain: document the simple domain first_irqLinus Walleij1-1/+4
The first_irq needs to be zero to get a linear domain and that comes with special semantics. We want to simplify this going forward but some documentation never hurts. Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Grant Likely <[email protected]>
2013-06-08kernel/irq/irqdomain.c: before use 'irq_data', need check it whether valid.Chen Gang1-1/+2
Since irq_data may be NULL, if so, we WARN_ON(), and continue, 'hwirq' which related with 'irq_data' has to initialize later, or it will cause issue. Signed-off-by: Chen Gang <[email protected]> Signed-off-by: Grant Likely <[email protected]>
2013-06-08irqdomain: export irq_domain_add_simpleArnd Bergmann1-0/+1
All other irq_domain_add_* functions are exported already, and apparently this one got left out by mistake, which causes build errors for ARM allmodconfig kernels: ERROR: "irq_domain_add_simple" [drivers/gpio/gpio-rcar.ko] undefined! ERROR: "irq_domain_add_simple" [drivers/gpio/gpio-em.ko] undefined! Signed-off-by: Arnd Bergmann <[email protected]> Acked-by: Simon Horman <[email protected]> Signed-off-by: Grant Likely <[email protected]>
2013-05-29genirq: Add kerneldoc for irq_disable.Andreas Fenkart1-0/+13
Document the lazy disable functionality. comment based on changelog of d209a699a0b975ad Signed-off-by: Andreas Fenkart <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/1368181290-1583-1-git-send-email-andreas.fenkart@streamunlimited.com Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: irqchip: Add mask to block out invalid irqsGrant Likely1-0/+3
Some controllers have irqs that aren't wired up and must never be used. For the generic chip attached to an irq_domain this provides a mask that can be used to block out particular irqs so that they never get mapped. Signed-off-by: Grant Likely <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: Generic chip: Add linear irq domain supportThomas Gleixner2-12/+181
Provide infrastructure for irq chip implementations which work on linear irq domains. - Interface to allocate multiple generic chips which are associated to the irq domain. - Interface to get the generic chip pointer for a particular hardware interrupt in the domain. - irq domain mapping function to install the chip for a particular interrupt. Note: This lacks a removal function for now. [ Sebastian Hesselbarth: Mask cache and pointer math fixups ] Signed-off-by: Thomas Gleixner <[email protected]> Cc: Thomas Petazzoni <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Gerlando Falauto <[email protected]> Cc: Rob Landley <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: Ezequiel Garcia <[email protected]> Cc: [email protected] Cc: Sebastian Hesselbarth <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: Generic chip: Split out code into separate functionsThomas Gleixner1-16/+34
Preparatory patch for linear interrupt domains. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Thomas Petazzoni <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Gerlando Falauto <[email protected]> Cc: Rob Landley <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: Ezequiel Garcia <[email protected]> Cc: [email protected] Cc: Sebastian Hesselbarth <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: irqchip: Add a mask calculation functionThomas Gleixner1-2/+6
Some chips have weird bit mask access patterns instead of the linear you expect. Allow them to calculate the cached mask themself. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Thomas Petazzoni <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Gerlando Falauto <[email protected]> Cc: Rob Landley <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: Ezequiel Garcia <[email protected]> Cc: [email protected] Cc: Sebastian Hesselbarth <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: Generic chip: Cache per irq bit maskThomas Gleixner1-9/+14
Cache the per irq bit mask instead of recalculating it over and over. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Thomas Petazzoni <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Gerlando Falauto <[email protected]> Cc: Rob Landley <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: Ezequiel Garcia <[email protected]> Cc: [email protected] Cc: Sebastian Hesselbarth <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: Generic chip: Handle separate mask registersGerlando Falauto1-7/+10
There are cases where all irq_chip_type instances have separate mask registers, making a shared mask register cache unsuitable for the purpose. Introduce a new flag IRQ_GC_MASK_CACHE_PER_TYPE. If set, point the per chip mask pointer to the per chip private mask cache instead. [ tglx: Simplified code, renamed flag and massaged changelog ] Signed-off-by: Gerlando Falauto <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Joey Oravec <[email protected]> Cc: Lennert Buytenhek <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Holger Brunck <[email protected]> Cc: Ezequiel Garcia <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Sebastian Hesselbarth <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Ben Dooks <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Simon Guinot <[email protected]> Cc: [email protected] Cc: Thomas Petazzoni <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: Nicolas Pitre <[email protected]> Cc: Rob Landley <[email protected]> Cc: Maxime Ripard <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: Generic chip: Add support for per chip type mask cacheGerlando Falauto1-6/+10
Today the same interrupt mask cache (stored within struct irq_chip_generic) is shared between all the irq_chip_type instances. As there are instances where each irq_chip_type uses a distinct mask register (as it is the case for Orion SoCs), sharing a single mask cache may be incorrect. So add a distinct pointer for each irq_chip_type, which for now points to the original mask register within irq_chip_generic. So no functional changes here. [ tglx: Minor cosmetic tweaks ] Reported-by: Joey Oravec <[email protected]> Signed-off-by: Simon Guinot <[email protected]> Signed-off-by: Holger Brunck <[email protected]> Signed-off-by: Gerlando Falauto <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Lennert Buytenhek <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Holger Brunck <[email protected]> Cc: Ezequiel Garcia <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Sebastian Hesselbarth <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Ben Dooks <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Simon Guinot <[email protected]> Cc: [email protected] Cc: Thomas Petazzoni <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: Nicolas Pitre <[email protected]> Cc: Rob Landley <[email protected]> Cc: Maxime Ripard <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-29genirq: Generic chip: Remove the local cur_regs() functionGerlando Falauto1-14/+17
Since we already have an irq_data_get_chip_type() function which returns a pointer to irq_chip_type, use that instead of cur_regs(). Signed-off-by: Gerlando Falauto <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Joey Oravec <[email protected]> Cc: Lennert Buytenhek <[email protected]> Cc: Russell King - ARM Linux <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Holger Brunck <[email protected]> Cc: Ezequiel Garcia <[email protected]> Acked-by: Grant Likely <[email protected]> Cc: Sebastian Hesselbarth <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: [email protected] Cc: Rob Herring <[email protected]> Cc: Ben Dooks <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Simon Guinot <[email protected]> Cc: [email protected] Cc: Thomas Petazzoni <[email protected]> Cc: Jean-Francois Moine <[email protected]> Cc: Nicolas Pitre <[email protected]> Cc: Rob Landley <[email protected]> Cc: Maxime Ripard <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-05-06irqdomain: Allow quiet failure modeBenjamin Herrenschmidt1-3/+17
Some interrupt controllers refuse to map interrupts marked as "protected" by firwmare. Since we try to map everyting in the device-tree on some platforms, we end up with a lot of nasty WARN's in the boot log for what is a normal situation on those machines. This defines a specific return code (-EPERM) from the host map() callback which cause irqdomain to fail silently. MPIC is updated to return this when hitting a protected source printing only a single line message for diagnostic purposes. Signed-off-by: Benjamin Herrenschmidt <[email protected]>
2013-05-01proc: Supply a function to remove a proc entry by PDEDavid Howells1-5/+1
Supply a function (proc_remove()) to remove a proc entry (and any subtree rooted there) by proc_dir_entry pointer rather than by name and (optionally) root dir entry pointer. This allows us to eliminate all remaining pde->name accesses outside of procfs. Signed-off-by: David Howells <[email protected]> Acked-by: Grant Likely <[email protected]> cc: [email protected] cc: [email protected] cc: [email protected] cc: [email protected] cc: [email protected] cc: [email protected] cc: [email protected] Signed-off-by: Al Viro <[email protected]>
2013-04-09procfs: new helper - PDE_DATA(inode)Al Viro1-7/+7
The only part of proc_dir_entry the code outside of fs/proc really cares about is PDE(inode)->data. Provide a helper for that; static inline for now, eventually will be moved to fs/proc, along with the knowledge of struct proc_dir_entry layout. Signed-off-by: Al Viro <[email protected]>
2013-02-26Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
2013-02-22new helper: file_inode(file)Al Viro1-1/+1
Signed-off-by: Al Viro <[email protected]>
2013-02-19Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds1-8/+22
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86/apic changes from Ingo Molnar: "Main changes: - Multiple MSI support added to the APIC, PCI and AHCI code - acked by all relevant maintainers, by Alexander Gordeev. The advantage is that multiple AHCI ports can have multiple MSI irqs assigned, and can thus spread to multiple CPUs. [ Drivers can make use of this new facility via the pci_enable_msi_block_auto() method ] - x86 IOAPIC code from interrupt remapping cleanups from Joerg Roedel: These patches move all interrupt remapping specific checks out of the x86 core code and replaces the respective call-sites with function pointers. As a result the interrupt remapping code is better abstraced from x86 core interrupt handling code. - Various smaller improvements, fixes and cleanups." * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits) x86/intel/irq_remapping: Clean up x2apic opt-out security warning mess x86, kvm: Fix intialization warnings in kvm.c x86, irq: Move irq_remapped out of x86 core code x86, io_apic: Introduce eoi_ioapic_pin call-back x86, msi: Introduce x86_msi.compose_msi_msg call-back x86, irq: Introduce setup_remapped_irq() x86, irq: Move irq_remapped() check into free_remapped_irq x86, io-apic: Remove !irq_remapped() check from __target_IO_APIC_irq() x86, io-apic: Move CONFIG_IRQ_REMAP code out of x86 core x86, irq: Add data structure to keep AMD specific irq remapping information x86, irq: Move irq_remapping_enabled declaration to iommu code x86, io_apic: Remove irq_remapping_enabled check in setup_timer_IRQ0_pin x86, io_apic: Move irq_remapping_enabled checks out of check_timer() x86, io_apic: Convert setup_ioapic_entry to function pointer x86, io_apic: Introduce set_affinity function pointer x86, msi: Use IRQ remapping specific setup_msi_irqs routine x86, hpet: Introduce x86_msi_ops.setup_hpet_msi x86, io_apic: Introduce x86_io_apic_ops.print_entries for debugging x86, io_apic: Introduce x86_io_apic_ops.disable() x86, apic: Mask IO-APIC and PIC unconditionally on LAPIC resume ...
2013-02-19Merge branch 'sched-core-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler changes from Ingo Molnar: "Main changes: - scheduler side full-dynticks (user-space execution is undisturbed and receives no timer IRQs) preparation changes that convert the cputime accounting code to be full-dynticks ready, from Frederic Weisbecker. - Initial sched.h split-up changes, by Clark Williams - select_idle_sibling() performance improvement by Mike Galbraith: " 1 tbench pair (worst case) in a 10 core + SMT package: pre 15.22 MB/sec 1 procs post 252.01 MB/sec 1 procs " - sched_rr_get_interval() ABI fix/change. We think this detail is not used by apps (so it's not an ABI in practice), but lets keep it under observation. - misc RT scheduling cleanups, optimizations" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) sched/rt: Add <linux/sched/rt.h> header to <linux/init_task.h> cputime: Remove irqsave from seqlock readers sched, powerpc: Fix sched.h split-up build failure cputime: Restore CPU_ACCOUNTING config defaults for PPC64 sched/rt: Move rt specific bits into new header file sched/rt: Add a tuning knob to allow changing SCHED_RR timeslice sched: Move sched.h sysctl bits into separate header sched: Fix signedness bug in yield_to() sched: Fix select_idle_sibling() bouncing cow syndrome sched/rt: Further simplify pick_rt_task() sched/rt: Do not account zero delta_exec in update_curr_rt() cputime: Safely read cputime of full dynticks CPUs kvm: Prepare to add generic guest entry/exit callbacks cputime: Use accessors to read task cputime stats cputime: Allow dynamic switch between tick/virtual based cputime accounting cputime: Generic on-demand virtual cputime accounting cputime: Move default nsecs_to_cputime() to jiffies based cputime file cputime: Librarize per nsecs resolution cputime definitions cputime: Avoid multiplication overflow on utime scaling context_tracking: Export context state for generic vtime ... Fix up conflict in kernel/context_tracking.c due to comment additions.
2013-02-18genirq: Export enable/disable_percpu_irq()Chris Metcalf1-0/+2
These functions are used by the tilegx onchip network driver, and it's useful to be able to load that driver as a module. Signed-off-by: Chris Metcalf <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-02-07sched/rt: Move rt specific bits into new header fileClark Williams1-0/+1
Move rt scheduler definitions out of include/linux/sched.h into new file include/linux/sched/rt.h Signed-off-by: Clark Williams <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Steven Rostedt <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2013-01-24x86/MSI: Support multiple MSIs in presense of IRQ remappingAlexander Gordeev1-8/+22
The MSI specification has several constraints in comparison with MSI-X, most notable of them is the inability to configure MSIs independently. As a result, it is impossible to dispatch interrupts from different queues to different CPUs. This is largely devalues the support of multiple MSIs in SMP systems. Also, a necessity to allocate a contiguous block of vector numbers for devices capable of multiple MSIs might cause a considerable pressure on x86 interrupt vector allocator and could lead to fragmentation of the interrupt vectors space. This patch overcomes both drawbacks in presense of IRQ remapping and lets devices take advantage of multiple queues and per-IRQ affinity assignments. Signed-off-by: Alexander Gordeev <[email protected]> Cc: Bjorn Helgaas <[email protected]> Cc: Suresh Siddha <[email protected]> Cc: Yinghai Lu <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Jeff Garzik <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/c8bd86ff56b5fc118257436768aaa04489ac0a4c.1353324359.git.agordeev@redhat.com Signed-off-by: Ingo Molnar <[email protected]>
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