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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq cleanups from Ingo Molnar:
"This is a multi-arch cleanup series from Thomas Gleixner, which we
kept to near the end of the merge window, to not interfere with
architecture updates.
This series (motivated by the -rt kernel) unifies more aspects of IRQ
handling and generalizes PREEMPT_ACTIVE"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
preempt: Make PREEMPT_ACTIVE generic
sparc: Use preempt_schedule_irq
ia64: Use preempt_schedule_irq
m32r: Use preempt_schedule_irq
hardirq: Make hardirq bits generic
m68k: Simplify low level interrupt handling code
genirq: Prevent spurious detection for unconditionally polled interrupts
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
"Usual earth-shaking, news-breaking, rocket science pile from
trivial.git"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
doc: usb: Fix typo in Documentation/usb/gadget_configs.txt
doc: add missing files to timers/00-INDEX
timekeeping: Fix some trivial typos in comments
mm: Fix some trivial typos in comments
irq: Fix some trivial typos in comments
NUMA: fix typos in Kconfig help text
mm: update 00-INDEX
doc: Documentation/DMA-attributes.txt fix typo
DRM: comment: `halve' -> `half'
Docs: Kconfig: `devlopers' -> `developers'
doc: typo on word accounting in kprobes.c in mutliple architectures
treewide: fix "usefull" typo
treewide: fix "distingush" typo
mm/Kconfig: Grammar s/an/a/
kexec: Typo s/the/then/
Documentation/kvm: Update cpuid documentation for steal time and pv eoi
treewide: Fix common typo in "identify"
__page_to_pfn: Fix typo in comment
Correct some typos for word frequency
clk: fixed-factor: Fix a trivial typo
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On a 68k platform a couple of interrupts are demultiplexed and
"polled" from a top level interrupt. Unfortunately there is no way to
determine which of the sub interrupts raised the top level interrupt,
so all of the demultiplexed interrupt handlers need to be
invoked. Given a high enough frequency this can trigger the spurious
interrupt detection mechanism, if one of the demultiplex interrupts
returns IRQ_NONE continuously. But this is a false positive as the
polling causes this behaviour and not buggy hardware/software.
Introduce IRQ_POLLED which can be set at interrupt chip setup time via
irq_set_status_flags(). The flag excludes the interrupt from the
spurious detector and from all core polling activities.
Reported-and-tested-by: Michael Schmitz <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring:
"DeviceTree updates for 3.13. This is a bit larger pull request than
usual for this cycle with lots of clean-up.
- Cross arch clean-up and consolidation of early DT scanning code.
- Clean-up and removal of arch prom.h headers. Makes arch specific
prom.h optional on all but Sparc.
- Addition of interrupts-extended property for devices connected to
multiple interrupt controllers.
- Refactoring of DT interrupt parsing code in preparation for
deferred probe of interrupts.
- ARM cpu and cpu topology bindings documentation.
- Various DT vendor binding documentation updates"
* tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits)
powerpc: add missing explicit OF includes for ppc
dt/irq: add empty of_irq_count for !OF_IRQ
dt: disable self-tests for !OF_IRQ
of: irq: Fix interrupt-map entry matching
MIPS: Netlogic: replace early_init_devtree() call
of: Add Panasonic Corporation vendor prefix
of: Add Chunghwa Picture Tubes Ltd. vendor prefix
of: Add AU Optronics Corporation vendor prefix
of/irq: Fix potential buffer overflow
of/irq: Fix bug in interrupt parsing refactor.
of: set dma_mask to point to coherent_dma_mask
of: add vendor prefix for PHYTEC Messtechnik GmbH
DT: sort vendor-prefixes.txt
of: Add vendor prefix for Cadence
of: Add empty for_each_available_child_of_node() macro definition
arm/versatile: Fix versatile irq specifications.
of/irq: create interrupts-extended property
microblaze/pci: Drop PowerPC-ism from irq parsing
of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code.
of/irq: Use irq_of_parse_and_map()
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In commit ee23871389 ("genirq: Set irq thread to RT priority on
creation") we moved the assigment of the thread's priority from the
thread's function into __setup_irq(). That function may run in user
context for instance if the user opens an UART node and then driver
calls requests in the ->open() callback. That user may not have
CAP_SYS_NICE and so the irq thread won't run with the SCHED_OTHER
policy.
This patch uses sched_setscheduler_nocheck() so we omit the CAP_SYS_NICE
check which is otherwise required for the SCHED_OTHER policy.
[bigeasy: Rewrite the changelog]
Signed-off-by: Thomas Pfaff <[email protected]>
Cc: Ivo Sieben <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
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All the callers of irq_create_of_mapping() pass the contents of a struct
of_phandle_args structure to the function. Since all the callers already
have an of_phandle_args pointer, why not pass it directly to
irq_create_of_mapping()?
Signed-off-by: Grant Likely <[email protected]>
Acked-by: Michal Simek <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Russell King <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
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Signed-off-by: Xie XiuQi <[email protected]>
[[email protected]: fix 'explicitly', noticed by Randy Dunlap]
Signed-off-by: Jiri Kosina <[email protected]>
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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]>
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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
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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.
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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
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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]>
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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
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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
...
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Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Randy Dunlap <[email protected]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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Nobody calls it; remove the function
Signed-off-by: Grant Likely <[email protected]>
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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]>
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Signed-off-by: Uwe Kleine-König <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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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]>
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