License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:07:57 +00:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2005-04-16 22:20:36 +00:00
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/*
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* IRQ subsystem internal functions and variables:
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2011-02-07 19:19:55 +00:00
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*
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* Do not ever include this file from anything else than
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* kernel/irq/. Do not even think about using any information outside
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* of this file for your non core code.
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2005-04-16 22:20:36 +00:00
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*/
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2010-10-01 14:03:45 +00:00
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#include <linux/irqdesc.h>
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2014-02-23 21:40:23 +00:00
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#include <linux/kernel_stat.h>
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2016-06-07 15:12:29 +00:00
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#include <linux/pm_runtime.h>
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2017-06-23 14:11:07 +00:00
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#include <linux/sched/clock.h>
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2005-04-16 22:20:36 +00:00
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2011-02-17 16:45:15 +00:00
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#ifdef CONFIG_SPARSE_IRQ
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2023-05-19 13:49:02 +00:00
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# define MAX_SPARSE_IRQS INT_MAX
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2011-02-17 16:45:15 +00:00
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#else
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2023-05-19 13:49:01 +00:00
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# define MAX_SPARSE_IRQS NR_IRQS
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2011-02-17 16:45:15 +00:00
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#endif
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2011-02-07 19:19:55 +00:00
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#define istate core_internal_state__do_not_mess_with_it
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2012-01-12 23:02:18 +00:00
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extern bool noirqdebug;
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2005-04-16 22:20:36 +00:00
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genirq: Allow migration of chained interrupts by installing default action
When a CPU is offlined all interrupts that have an action are migrated to
other still online CPUs. However, if the interrupt has chained handler
installed this is not done. Chained handlers are used by GPIO drivers which
support interrupts, for instance.
When the affinity is not corrected properly we end up in situation where
most interrupts are not arriving to the online CPUs anymore. For example on
Intel Braswell system which has SD-card card detection signal connected to
a GPIO the IO-APIC routing entries look like below after CPU1 is offlined:
pin30, enabled , level, low , V(52), IRR(0), S(0), logical , D(03), M(1)
pin31, enabled , level, low , V(42), IRR(0), S(0), logical , D(03), M(1)
pin32, enabled , level, low , V(62), IRR(0), S(0), logical , D(03), M(1)
pin5b, enabled , level, low , V(72), IRR(0), S(0), logical , D(03), M(1)
The problem here is that the destination mask still contains both CPUs even
if CPU1 is already offline. This means that the IO-APIC still routes
interrupts to the other CPU as well.
We solve the problem by providing a default action for chained interrupts.
This action allows the migration code to correct affinity (as it finds
desc->action != NULL).
Also make the default action handler to emit a warning if for some reason a
chained handler ends up calling it.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Link: http://lkml.kernel.org/r/1444039935-30475-1-git-send-email-mika.westerberg@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-05 10:12:15 +00:00
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extern struct irqaction chained_action;
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2011-02-07 00:55:43 +00:00
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/*
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* Bits used by threaded handlers:
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* IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
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* IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
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* IRQTF_AFFINITY - irq thread is requested to adjust affinity
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2011-02-23 23:52:23 +00:00
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* IRQTF_FORCED_THREAD - irq action is force threaded
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genirq: Synchronize interrupt thread startup
A kernel hang can be observed when running setserial in a loop on a kernel
with force threaded interrupts. The sequence of events is:
setserial
open("/dev/ttyXXX")
request_irq()
do_stuff()
-> serial interrupt
-> wake(irq_thread)
desc->threads_active++;
close()
free_irq()
kthread_stop(irq_thread)
synchronize_irq() <- hangs because desc->threads_active != 0
The thread is created in request_irq() and woken up, but does not get on a
CPU to reach the actual thread function, which would handle the pending
wake-up. kthread_stop() sets the should stop condition which makes the
thread immediately exit, which in turn leaves the stale threads_active
count around.
This problem was introduced with commit 519cc8652b3a, which addressed a
interrupt sharing issue in the PCIe code.
Before that commit free_irq() invoked synchronize_irq(), which waits for
the hard interrupt handler and also for associated threads to complete.
To address the PCIe issue synchronize_irq() was replaced with
__synchronize_hardirq(), which only waits for the hard interrupt handler to
complete, but not for threaded handlers.
This was done under the assumption, that the interrupt thread already
reached the thread function and waits for a wake-up, which is guaranteed to
be handled before acting on the stop condition. The problematic case, that
the thread would not reach the thread function, was obviously overlooked.
Make sure that the interrupt thread is really started and reaches
thread_fn() before returning from __setup_irq().
This utilizes the existing wait queue in the interrupt descriptor. The
wait queue is unused for non-shared interrupts. For shared interrupts the
usage might cause a spurious wake-up of a waiter in synchronize_irq() or the
completion of a threaded handler might cause a spurious wake-up of the
waiter for the ready flag. Both are harmless and have no functional impact.
[ tglx: Amended changelog ]
Fixes: 519cc8652b3a ("genirq: Synchronize only with single thread on free_irq()")
Signed-off-by: Thomas Pfaff <tpfaff@pcs.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/552fe7b4-9224-b183-bb87-a8f36d335690@pcs.com
2022-05-02 11:28:29 +00:00
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* IRQTF_READY - signals that irq thread is ready
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2011-02-07 00:55:43 +00:00
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*/
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enum {
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IRQTF_RUNTHREAD,
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IRQTF_WARNED,
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IRQTF_AFFINITY,
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2011-02-23 23:52:23 +00:00
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IRQTF_FORCED_THREAD,
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genirq: Synchronize interrupt thread startup
A kernel hang can be observed when running setserial in a loop on a kernel
with force threaded interrupts. The sequence of events is:
setserial
open("/dev/ttyXXX")
request_irq()
do_stuff()
-> serial interrupt
-> wake(irq_thread)
desc->threads_active++;
close()
free_irq()
kthread_stop(irq_thread)
synchronize_irq() <- hangs because desc->threads_active != 0
The thread is created in request_irq() and woken up, but does not get on a
CPU to reach the actual thread function, which would handle the pending
wake-up. kthread_stop() sets the should stop condition which makes the
thread immediately exit, which in turn leaves the stale threads_active
count around.
This problem was introduced with commit 519cc8652b3a, which addressed a
interrupt sharing issue in the PCIe code.
Before that commit free_irq() invoked synchronize_irq(), which waits for
the hard interrupt handler and also for associated threads to complete.
To address the PCIe issue synchronize_irq() was replaced with
__synchronize_hardirq(), which only waits for the hard interrupt handler to
complete, but not for threaded handlers.
This was done under the assumption, that the interrupt thread already
reached the thread function and waits for a wake-up, which is guaranteed to
be handled before acting on the stop condition. The problematic case, that
the thread would not reach the thread function, was obviously overlooked.
Make sure that the interrupt thread is really started and reaches
thread_fn() before returning from __setup_irq().
This utilizes the existing wait queue in the interrupt descriptor. The
wait queue is unused for non-shared interrupts. For shared interrupts the
usage might cause a spurious wake-up of a waiter in synchronize_irq() or the
completion of a threaded handler might cause a spurious wake-up of the
waiter for the ready flag. Both are harmless and have no functional impact.
[ tglx: Amended changelog ]
Fixes: 519cc8652b3a ("genirq: Synchronize only with single thread on free_irq()")
Signed-off-by: Thomas Pfaff <tpfaff@pcs.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/552fe7b4-9224-b183-bb87-a8f36d335690@pcs.com
2022-05-02 11:28:29 +00:00
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IRQTF_READY,
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2011-02-07 00:55:43 +00:00
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};
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2011-02-07 19:25:25 +00:00
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/*
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2014-05-27 08:07:37 +00:00
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* Bit masks for desc->core_internal_state__do_not_mess_with_it
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2011-02-07 19:25:25 +00:00
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*
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* IRQS_AUTODETECT - autodetection in progress
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2011-02-07 19:40:54 +00:00
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* IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
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* detection
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2011-02-07 19:55:35 +00:00
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* IRQS_POLL_INPROGRESS - polling in progress
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2011-02-07 20:02:10 +00:00
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* IRQS_ONESHOT - irq is not unmasked in primary handler
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2023-06-08 12:00:19 +00:00
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* IRQS_REPLAY - irq has been resent and will not be resent
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* again until the handler has run and cleared
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* this flag.
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2011-02-08 10:39:15 +00:00
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* IRQS_WAITING - irq is waiting
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2023-06-08 12:00:19 +00:00
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* IRQS_PENDING - irq needs to be resent and should be resent
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* at the next available opportunity.
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2011-02-08 11:44:58 +00:00
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* IRQS_SUSPENDED - irq is suspended
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2019-01-31 14:53:58 +00:00
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* IRQS_NMI - irq line is used to deliver NMIs
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2022-11-28 15:16:12 +00:00
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* IRQS_SYSFS - descriptor has been added to sysfs
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2011-02-07 19:25:25 +00:00
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*/
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enum {
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IRQS_AUTODETECT = 0x00000001,
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2011-02-07 19:40:54 +00:00
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IRQS_SPURIOUS_DISABLED = 0x00000002,
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2011-02-07 19:55:35 +00:00
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IRQS_POLL_INPROGRESS = 0x00000008,
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2011-02-07 20:02:10 +00:00
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IRQS_ONESHOT = 0x00000020,
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2011-02-08 10:39:15 +00:00
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IRQS_REPLAY = 0x00000040,
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IRQS_WAITING = 0x00000080,
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2011-02-08 11:17:57 +00:00
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IRQS_PENDING = 0x00000200,
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2011-02-08 11:44:58 +00:00
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IRQS_SUSPENDED = 0x00000800,
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2017-06-23 14:11:07 +00:00
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IRQS_TIMINGS = 0x00001000,
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2019-01-31 14:53:58 +00:00
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IRQS_NMI = 0x00002000,
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2022-11-28 15:16:12 +00:00
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IRQS_SYSFS = 0x00004000,
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2011-02-07 19:25:25 +00:00
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};
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2011-02-09 19:44:21 +00:00
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#include "debug.h"
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#include "settings.h"
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2015-06-23 17:47:29 +00:00
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extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags);
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2015-06-23 17:52:36 +00:00
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extern void __disable_irq(struct irq_desc *desc);
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extern void __enable_irq(struct irq_desc *desc);
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2008-10-01 21:46:18 +00:00
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2017-06-19 23:37:49 +00:00
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#define IRQ_RESEND true
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#define IRQ_NORESEND false
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#define IRQ_START_FORCE true
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#define IRQ_START_COND false
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2017-09-13 21:29:09 +00:00
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extern int irq_activate(struct irq_desc *desc);
|
2018-01-30 18:36:32 +00:00
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extern int irq_activate_and_startup(struct irq_desc *desc, bool resend);
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2017-06-19 23:37:49 +00:00
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extern int irq_startup(struct irq_desc *desc, bool resend, bool force);
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2011-02-02 21:41:14 +00:00
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extern void irq_shutdown(struct irq_desc *desc);
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2019-06-28 11:11:49 +00:00
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extern void irq_shutdown_and_deactivate(struct irq_desc *desc);
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2011-02-03 11:27:44 +00:00
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extern void irq_enable(struct irq_desc *desc);
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extern void irq_disable(struct irq_desc *desc);
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genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
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extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
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extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
|
2011-02-10 12:16:14 +00:00
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extern void mask_irq(struct irq_desc *desc);
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extern void unmask_irq(struct irq_desc *desc);
|
2014-03-13 18:03:51 +00:00
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extern void unmask_threaded_irq(struct irq_desc *desc);
|
2011-02-02 21:41:14 +00:00
|
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|
2024-04-11 07:41:32 +00:00
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extern unsigned int kstat_irqs_desc(struct irq_desc *desc, const struct cpumask *cpumask);
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|
2014-05-07 15:44:21 +00:00
|
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#ifdef CONFIG_SPARSE_IRQ
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static inline void irq_mark_irq(unsigned int irq) { }
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#else
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extern void irq_mark_irq(unsigned int irq);
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#endif
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2019-06-28 11:11:51 +00:00
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extern int __irq_get_irqchip_state(struct irq_data *data,
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enum irqchip_irq_state which,
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bool *state);
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2021-12-07 12:17:34 +00:00
|
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irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc);
|
2015-09-02 02:24:55 +00:00
|
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|
irqreturn_t handle_irq_event_percpu(struct irq_desc *desc);
|
2011-02-07 00:08:49 +00:00
|
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irqreturn_t handle_irq_event(struct irq_desc *desc);
|
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2010-10-01 14:03:45 +00:00
|
|
|
/* Resending of interrupts :*/
|
2020-03-06 13:03:47 +00:00
|
|
|
int check_irq_resend(struct irq_desc *desc, bool inject);
|
2023-05-19 13:49:00 +00:00
|
|
|
void clear_irq_resend(struct irq_desc *desc);
|
|
|
|
|
void irq_resend_init(struct irq_desc *desc);
|
2011-02-07 09:34:30 +00:00
|
|
|
bool irq_wait_for_poll(struct irq_desc *desc);
|
2014-02-15 00:55:19 +00:00
|
|
|
void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
|
2010-10-01 14:03:45 +00:00
|
|
|
|
2023-07-06 14:22:25 +00:00
|
|
|
void wake_threads_waitq(struct irq_desc *desc);
|
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
#ifdef CONFIG_PROC_FS
|
2008-08-20 03:50:11 +00:00
|
|
|
extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
|
2010-09-30 00:46:07 +00:00
|
|
|
extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
|
2005-04-16 22:20:36 +00:00
|
|
|
extern void register_handler_proc(unsigned int irq, struct irqaction *action);
|
|
|
|
|
extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
|
|
|
|
|
#else
|
2008-08-20 03:50:11 +00:00
|
|
|
static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
|
2010-09-30 00:46:07 +00:00
|
|
|
static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
|
2005-04-16 22:20:36 +00:00
|
|
|
static inline void register_handler_proc(unsigned int irq,
|
|
|
|
|
struct irqaction *action) { }
|
|
|
|
|
static inline void unregister_handler_proc(unsigned int irq,
|
|
|
|
|
struct irqaction *action) { }
|
|
|
|
|
#endif
|
|
|
|
|
|
2016-07-04 08:39:23 +00:00
|
|
|
extern bool irq_can_set_affinity_usr(unsigned int irq);
|
|
|
|
|
|
2009-07-21 09:09:39 +00:00
|
|
|
extern void irq_set_thread_affinity(struct irq_desc *desc);
|
2009-04-28 00:59:53 +00:00
|
|
|
|
2012-03-30 15:11:34 +00:00
|
|
|
extern int irq_do_set_affinity(struct irq_data *data,
|
|
|
|
|
const struct cpumask *dest, bool force);
|
|
|
|
|
|
2017-06-19 23:37:22 +00:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
|
extern int irq_setup_affinity(struct irq_desc *desc);
|
|
|
|
|
#else
|
|
|
|
|
static inline int irq_setup_affinity(struct irq_desc *desc) { return 0; }
|
|
|
|
|
#endif
|
|
|
|
|
|
2009-08-13 10:17:48 +00:00
|
|
|
/* Inline functions for support of irq chips on slow busses */
|
2010-09-27 12:44:35 +00:00
|
|
|
static inline void chip_bus_lock(struct irq_desc *desc)
|
2009-08-13 10:17:48 +00:00
|
|
|
{
|
2010-09-27 12:44:35 +00:00
|
|
|
if (unlikely(desc->irq_data.chip->irq_bus_lock))
|
|
|
|
|
desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
|
2009-08-13 10:17:48 +00:00
|
|
|
}
|
|
|
|
|
|
2010-09-27 12:44:35 +00:00
|
|
|
static inline void chip_bus_sync_unlock(struct irq_desc *desc)
|
2009-08-13 10:17:48 +00:00
|
|
|
{
|
2010-09-27 12:44:35 +00:00
|
|
|
if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
|
|
|
|
|
desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
|
2009-08-13 10:17:48 +00:00
|
|
|
}
|
|
|
|
|
|
genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
|
|
|
#define _IRQ_DESC_CHECK (1 << 0)
|
|
|
|
|
#define _IRQ_DESC_PERCPU (1 << 1)
|
|
|
|
|
|
|
|
|
|
#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
|
|
|
|
|
#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
|
|
|
|
|
|
2016-01-14 09:54:13 +00:00
|
|
|
#define for_each_action_of_desc(desc, act) \
|
2017-08-09 06:32:21 +00:00
|
|
|
for (act = desc->action; act; act = act->next)
|
2016-01-14 09:54:13 +00:00
|
|
|
|
2011-02-12 11:16:16 +00:00
|
|
|
struct irq_desc *
|
genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
|
|
|
__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
|
|
|
|
|
unsigned int check);
|
2011-02-12 11:16:16 +00:00
|
|
|
void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
|
|
|
|
|
|
|
|
|
|
static inline struct irq_desc *
|
genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
|
|
|
irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
|
2011-02-12 11:16:16 +00:00
|
|
|
{
|
genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
|
|
|
return __irq_get_desc_lock(irq, flags, true, check);
|
2011-02-12 11:16:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void
|
|
|
|
|
irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
|
|
|
|
|
{
|
|
|
|
|
__irq_put_desc_unlock(desc, flags, true);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline struct irq_desc *
|
genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
|
|
|
irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
|
2011-02-12 11:16:16 +00:00
|
|
|
{
|
genirq: Add support for per-cpu dev_id interrupts
The ARM GIC interrupt controller offers per CPU interrupts (PPIs),
which are usually used to connect local timers to each core. Each CPU
has its own private interface to the GIC, and only sees the PPIs that
are directly connect to it.
While these timers are separate devices and have a separate interrupt
line to a core, they all use the same IRQ number.
For these devices, request_irq() is not the right API as it assumes
that an IRQ number is visible by a number of CPUs (through the
affinity setting), but makes it very awkward to express that an IRQ
number can be handled by all CPUs, and yet be a different interrupt
line on each CPU, requiring a different dev_id cookie to be passed
back to the handler.
The *_percpu_irq() functions is designed to overcome these
limitations, by providing a per-cpu dev_id vector:
int request_percpu_irq(unsigned int irq, irq_handler_t handler,
const char *devname, void __percpu *percpu_dev_id);
void free_percpu_irq(unsigned int, void __percpu *);
int setup_percpu_irq(unsigned int irq, struct irqaction *new);
void remove_percpu_irq(unsigned int irq, struct irqaction *act);
void enable_percpu_irq(unsigned int irq);
void disable_percpu_irq(unsigned int irq);
The API has a number of limitations:
- no interrupt sharing
- no threading
- common handler across all the CPUs
Once the interrupt is requested using setup_percpu_irq() or
request_percpu_irq(), it must be enabled by each core that wishes its
local interrupt to be delivered.
Based on an initial patch by Thomas Gleixner.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-23 16:03:06 +00:00
|
|
|
return __irq_get_desc_lock(irq, flags, false, check);
|
2011-02-12 11:16:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void
|
|
|
|
|
irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
|
|
|
|
|
{
|
|
|
|
|
__irq_put_desc_unlock(desc, flags, false);
|
|
|
|
|
}
|
|
|
|
|
|
2015-12-29 04:18:48 +00:00
|
|
|
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
|
|
|
|
|
|
2017-06-19 23:37:17 +00:00
|
|
|
static inline unsigned int irqd_get(struct irq_data *d)
|
|
|
|
|
{
|
|
|
|
|
return __irqd_to_state(d);
|
|
|
|
|
}
|
|
|
|
|
|
2011-02-05 14:20:04 +00:00
|
|
|
/*
|
|
|
|
|
* Manipulation functions for irq_data.state
|
|
|
|
|
*/
|
|
|
|
|
static inline void irqd_set_move_pending(struct irq_data *d)
|
|
|
|
|
{
|
2015-06-01 08:05:12 +00:00
|
|
|
__irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;
|
2011-02-05 14:20:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void irqd_clr_move_pending(struct irq_data *d)
|
|
|
|
|
{
|
2015-06-01 08:05:12 +00:00
|
|
|
__irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;
|
2011-02-05 14:20:04 +00:00
|
|
|
}
|
2011-02-08 16:11:03 +00:00
|
|
|
|
2017-06-19 23:37:47 +00:00
|
|
|
static inline void irqd_set_managed_shutdown(struct irq_data *d)
|
|
|
|
|
{
|
|
|
|
|
__irqd_to_state(d) |= IRQD_MANAGED_SHUTDOWN;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void irqd_clr_managed_shutdown(struct irq_data *d)
|
|
|
|
|
{
|
|
|
|
|
__irqd_to_state(d) &= ~IRQD_MANAGED_SHUTDOWN;
|
|
|
|
|
}
|
|
|
|
|
|
2011-02-08 16:11:03 +00:00
|
|
|
static inline void irqd_clear(struct irq_data *d, unsigned int mask)
|
|
|
|
|
{
|
2015-06-01 08:05:12 +00:00
|
|
|
__irqd_to_state(d) &= ~mask;
|
2011-02-08 16:11:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void irqd_set(struct irq_data *d, unsigned int mask)
|
|
|
|
|
{
|
2015-06-01 08:05:12 +00:00
|
|
|
__irqd_to_state(d) |= mask;
|
2011-02-08 16:11:03 +00:00
|
|
|
}
|
|
|
|
|
|
2011-02-08 16:22:00 +00:00
|
|
|
static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
|
|
|
|
|
{
|
2015-06-01 08:05:12 +00:00
|
|
|
return __irqd_to_state(d) & mask;
|
2011-02-08 16:22:00 +00:00
|
|
|
}
|
2014-02-23 21:40:23 +00:00
|
|
|
|
2017-07-17 17:47:02 +00:00
|
|
|
static inline void irq_state_set_disabled(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void irq_state_set_masked(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
irqd_set(&desc->irq_data, IRQD_IRQ_MASKED);
|
|
|
|
|
}
|
|
|
|
|
|
2015-12-29 04:18:48 +00:00
|
|
|
#undef __irqd_to_state
|
|
|
|
|
|
2019-02-08 13:48:03 +00:00
|
|
|
static inline void __kstat_incr_irqs_this_cpu(struct irq_desc *desc)
|
2014-02-23 21:40:23 +00:00
|
|
|
{
|
2024-04-11 07:41:30 +00:00
|
|
|
__this_cpu_inc(desc->kstat_irqs->cnt);
|
2014-02-23 21:40:23 +00:00
|
|
|
__this_cpu_inc(kstat.irqs_sum);
|
|
|
|
|
}
|
2014-08-28 09:44:31 +00:00
|
|
|
|
2019-02-08 13:48:03 +00:00
|
|
|
static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
__kstat_incr_irqs_this_cpu(desc);
|
|
|
|
|
desc->tot_count++;
|
|
|
|
|
}
|
|
|
|
|
|
2015-06-01 08:05:13 +00:00
|
|
|
static inline int irq_desc_get_node(struct irq_desc *desc)
|
|
|
|
|
{
|
2015-06-01 08:05:16 +00:00
|
|
|
return irq_common_data_get_node(&desc->irq_common_data);
|
2015-06-01 08:05:13 +00:00
|
|
|
}
|
|
|
|
|
|
2015-11-10 09:58:12 +00:00
|
|
|
static inline int irq_desc_is_chained(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
return (desc->action && desc->action == &chained_action);
|
|
|
|
|
}
|
|
|
|
|
|
2024-04-23 02:40:37 +00:00
|
|
|
static inline bool irq_is_nmi(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
return desc->istate & IRQS_NMI;
|
|
|
|
|
}
|
|
|
|
|
|
2014-08-28 09:44:31 +00:00
|
|
|
#ifdef CONFIG_PM_SLEEP
|
2014-08-29 12:00:16 +00:00
|
|
|
bool irq_pm_check_wakeup(struct irq_desc *desc);
|
2014-08-28 09:44:31 +00:00
|
|
|
void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
|
|
|
|
|
void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
|
|
|
|
|
#else
|
2014-08-29 12:00:16 +00:00
|
|
|
static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
|
2014-08-28 09:44:31 +00:00
|
|
|
static inline void
|
|
|
|
|
irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
|
|
|
|
|
static inline void
|
|
|
|
|
irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
|
|
|
|
|
#endif
|
2017-05-31 16:06:58 +00:00
|
|
|
|
2017-06-23 14:11:07 +00:00
|
|
|
#ifdef CONFIG_IRQ_TIMINGS
|
|
|
|
|
|
|
|
|
|
#define IRQ_TIMINGS_SHIFT 5
|
|
|
|
|
#define IRQ_TIMINGS_SIZE (1 << IRQ_TIMINGS_SHIFT)
|
|
|
|
|
#define IRQ_TIMINGS_MASK (IRQ_TIMINGS_SIZE - 1)
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* struct irq_timings - irq timings storing structure
|
|
|
|
|
* @values: a circular buffer of u64 encoded <timestamp,irq> values
|
|
|
|
|
* @count: the number of elements in the array
|
|
|
|
|
*/
|
|
|
|
|
struct irq_timings {
|
|
|
|
|
u64 values[IRQ_TIMINGS_SIZE];
|
|
|
|
|
int count;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
DECLARE_PER_CPU(struct irq_timings, irq_timings);
|
|
|
|
|
|
2017-06-23 14:11:08 +00:00
|
|
|
extern void irq_timings_free(int irq);
|
|
|
|
|
extern int irq_timings_alloc(int irq);
|
|
|
|
|
|
2017-06-23 14:11:07 +00:00
|
|
|
static inline void irq_remove_timings(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
desc->istate &= ~IRQS_TIMINGS;
|
2017-06-23 14:11:08 +00:00
|
|
|
|
|
|
|
|
irq_timings_free(irq_desc_get_irq(desc));
|
2017-06-23 14:11:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void irq_setup_timings(struct irq_desc *desc, struct irqaction *act)
|
|
|
|
|
{
|
2017-06-23 14:11:08 +00:00
|
|
|
int irq = irq_desc_get_irq(desc);
|
|
|
|
|
int ret;
|
|
|
|
|
|
2017-06-23 14:11:07 +00:00
|
|
|
/*
|
|
|
|
|
* We don't need the measurement because the idle code already
|
|
|
|
|
* knows the next expiry event.
|
|
|
|
|
*/
|
|
|
|
|
if (act->flags & __IRQF_TIMER)
|
|
|
|
|
return;
|
|
|
|
|
|
2017-06-23 14:11:08 +00:00
|
|
|
/*
|
|
|
|
|
* In case the timing allocation fails, we just want to warn,
|
|
|
|
|
* not fail, so letting the system boot anyway.
|
|
|
|
|
*/
|
|
|
|
|
ret = irq_timings_alloc(irq);
|
|
|
|
|
if (ret) {
|
|
|
|
|
pr_warn("Failed to allocate irq timing stats for irq%d (%d)",
|
|
|
|
|
irq, ret);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2017-06-23 14:11:07 +00:00
|
|
|
desc->istate |= IRQS_TIMINGS;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
extern void irq_timings_enable(void);
|
|
|
|
|
extern void irq_timings_disable(void);
|
|
|
|
|
|
|
|
|
|
DECLARE_STATIC_KEY_FALSE(irq_timing_enabled);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The interrupt number and the timestamp are encoded into a single
|
|
|
|
|
* u64 variable to optimize the size.
|
|
|
|
|
* 48 bit time stamp and 16 bit IRQ number is way sufficient.
|
|
|
|
|
* Who cares an IRQ after 78 hours of idle time?
|
|
|
|
|
*/
|
|
|
|
|
static inline u64 irq_timing_encode(u64 timestamp, int irq)
|
|
|
|
|
{
|
|
|
|
|
return (timestamp << 16) | irq;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline int irq_timing_decode(u64 value, u64 *timestamp)
|
|
|
|
|
{
|
|
|
|
|
*timestamp = value >> 16;
|
|
|
|
|
return value & U16_MAX;
|
|
|
|
|
}
|
|
|
|
|
|
2019-05-27 20:55:17 +00:00
|
|
|
static __always_inline void irq_timings_push(u64 ts, int irq)
|
|
|
|
|
{
|
|
|
|
|
struct irq_timings *timings = this_cpu_ptr(&irq_timings);
|
|
|
|
|
|
|
|
|
|
timings->values[timings->count & IRQ_TIMINGS_MASK] =
|
|
|
|
|
irq_timing_encode(ts, irq);
|
|
|
|
|
|
|
|
|
|
timings->count++;
|
|
|
|
|
}
|
|
|
|
|
|
2017-06-23 14:11:07 +00:00
|
|
|
/*
|
|
|
|
|
* The function record_irq_time is only called in one place in the
|
|
|
|
|
* interrupts handler. We want this function always inline so the code
|
|
|
|
|
* inside is embedded in the function and the static key branching
|
|
|
|
|
* code can act at the higher level. Without the explicit
|
|
|
|
|
* __always_inline we can end up with a function call and a small
|
|
|
|
|
* overhead in the hotpath for nothing.
|
|
|
|
|
*/
|
|
|
|
|
static __always_inline void record_irq_time(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
if (!static_branch_likely(&irq_timing_enabled))
|
|
|
|
|
return;
|
|
|
|
|
|
2019-05-27 20:55:17 +00:00
|
|
|
if (desc->istate & IRQS_TIMINGS)
|
|
|
|
|
irq_timings_push(local_clock(), irq_desc_get_irq(desc));
|
2017-06-23 14:11:07 +00:00
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
static inline void irq_remove_timings(struct irq_desc *desc) {}
|
|
|
|
|
static inline void irq_setup_timings(struct irq_desc *desc,
|
|
|
|
|
struct irqaction *act) {};
|
|
|
|
|
static inline void record_irq_time(struct irq_desc *desc) {}
|
|
|
|
|
#endif /* CONFIG_IRQ_TIMINGS */
|
|
|
|
|
|
|
|
|
|
|
2017-05-31 16:06:58 +00:00
|
|
|
#ifdef CONFIG_GENERIC_IRQ_CHIP
|
|
|
|
|
void irq_init_generic_chip(struct irq_chip_generic *gc, const char *name,
|
|
|
|
|
int num_ct, unsigned int irq_base,
|
|
|
|
|
void __iomem *reg_base, irq_flow_handler_t handler);
|
|
|
|
|
#else
|
|
|
|
|
static inline void
|
|
|
|
|
irq_init_generic_chip(struct irq_chip_generic *gc, const char *name,
|
|
|
|
|
int num_ct, unsigned int irq_base,
|
|
|
|
|
void __iomem *reg_base, irq_flow_handler_t handler) { }
|
|
|
|
|
#endif /* CONFIG_GENERIC_IRQ_CHIP */
|
2017-06-19 23:37:17 +00:00
|
|
|
|
2017-06-19 23:37:24 +00:00
|
|
|
#ifdef CONFIG_GENERIC_PENDING_IRQ
|
|
|
|
|
static inline bool irq_can_move_pcntxt(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
return irqd_can_move_in_process_context(data);
|
|
|
|
|
}
|
|
|
|
|
static inline bool irq_move_pending(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
return irqd_is_setaffinity_pending(data);
|
|
|
|
|
}
|
|
|
|
|
static inline void
|
|
|
|
|
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask)
|
|
|
|
|
{
|
|
|
|
|
cpumask_copy(desc->pending_mask, mask);
|
|
|
|
|
}
|
|
|
|
|
static inline void
|
|
|
|
|
irq_get_pending(struct cpumask *mask, struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
cpumask_copy(mask, desc->pending_mask);
|
|
|
|
|
}
|
2017-06-19 23:37:29 +00:00
|
|
|
static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
return desc->pending_mask;
|
|
|
|
|
}
|
2020-03-06 13:03:43 +00:00
|
|
|
static inline bool handle_enforce_irqctx(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
return irqd_is_handle_enforce_irqctx(data);
|
|
|
|
|
}
|
2017-06-19 23:37:34 +00:00
|
|
|
bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear);
|
2017-06-19 23:37:24 +00:00
|
|
|
#else /* CONFIG_GENERIC_PENDING_IRQ */
|
|
|
|
|
static inline bool irq_can_move_pcntxt(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
static inline bool irq_move_pending(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
static inline void
|
|
|
|
|
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
static inline void
|
|
|
|
|
irq_get_pending(struct cpumask *mask, struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
}
|
2017-06-19 23:37:29 +00:00
|
|
|
static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
2017-06-19 23:37:34 +00:00
|
|
|
static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear)
|
|
|
|
|
{
|
|
|
|
|
return false;
|
|
|
|
|
}
|
2020-03-06 13:03:43 +00:00
|
|
|
static inline bool handle_enforce_irqctx(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
return false;
|
|
|
|
|
}
|
2017-06-19 23:37:29 +00:00
|
|
|
#endif /* !CONFIG_GENERIC_PENDING_IRQ */
|
2017-06-19 23:37:24 +00:00
|
|
|
|
2017-09-13 21:29:07 +00:00
|
|
|
#if !defined(CONFIG_IRQ_DOMAIN) || !defined(CONFIG_IRQ_DOMAIN_HIERARCHY)
|
2017-12-29 15:59:06 +00:00
|
|
|
static inline int irq_domain_activate_irq(struct irq_data *data, bool reserve)
|
2017-09-13 21:29:07 +00:00
|
|
|
{
|
|
|
|
|
irqd_set_activated(data);
|
2017-09-13 21:29:11 +00:00
|
|
|
return 0;
|
2017-09-13 21:29:07 +00:00
|
|
|
}
|
|
|
|
|
static inline void irq_domain_deactivate_irq(struct irq_data *data)
|
|
|
|
|
{
|
|
|
|
|
irqd_clr_activated(data);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
2020-08-26 11:16:32 +00:00
|
|
|
static inline struct irq_data *irqd_get_parent_data(struct irq_data *irqd)
|
|
|
|
|
{
|
|
|
|
|
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
|
|
|
|
|
return irqd->parent_data;
|
|
|
|
|
#else
|
|
|
|
|
return NULL;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
2017-06-19 23:37:17 +00:00
|
|
|
#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
|
2017-06-24 09:05:59 +00:00
|
|
|
#include <linux/debugfs.h>
|
|
|
|
|
|
2024-05-29 09:16:28 +00:00
|
|
|
struct irq_bit_descr {
|
|
|
|
|
unsigned int mask;
|
|
|
|
|
char *name;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#define BIT_MASK_DESCR(m) { .mask = m, .name = #m }
|
|
|
|
|
|
|
|
|
|
void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
|
|
|
|
|
const struct irq_bit_descr *sd, int size);
|
|
|
|
|
|
2017-06-19 23:37:17 +00:00
|
|
|
void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc);
|
2017-06-24 09:05:59 +00:00
|
|
|
static inline void irq_remove_debugfs_entry(struct irq_desc *desc)
|
|
|
|
|
{
|
|
|
|
|
debugfs_remove(desc->debugfs_file);
|
2017-09-13 21:29:05 +00:00
|
|
|
kfree(desc->dev_name);
|
2017-06-24 09:05:59 +00:00
|
|
|
}
|
2017-09-13 21:29:05 +00:00
|
|
|
void irq_debugfs_copy_devname(int irq, struct device *dev);
|
2017-06-19 23:37:17 +00:00
|
|
|
# ifdef CONFIG_IRQ_DOMAIN
|
|
|
|
|
void irq_domain_debugfs_init(struct dentry *root);
|
|
|
|
|
# else
|
2017-07-04 09:25:15 +00:00
|
|
|
static inline void irq_domain_debugfs_init(struct dentry *root)
|
|
|
|
|
{
|
|
|
|
|
}
|
2017-06-19 23:37:17 +00:00
|
|
|
# endif
|
|
|
|
|
#else /* CONFIG_GENERIC_IRQ_DEBUGFS */
|
|
|
|
|
static inline void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *d)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
static inline void irq_remove_debugfs_entry(struct irq_desc *d)
|
|
|
|
|
{
|
|
|
|
|
}
|
2017-09-13 21:29:05 +00:00
|
|
|
static inline void irq_debugfs_copy_devname(int irq, struct device *dev)
|
|
|
|
|
{
|
|
|
|
|
}
|
2017-06-19 23:37:17 +00:00
|
|
|
#endif /* CONFIG_GENERIC_IRQ_DEBUGFS */
|
