2 * linux/kernel/irq/chip.c
4 * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
5 * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
7 * This file contains the core interrupt handling code, for irq-chip
10 * Detailed information is available in Documentation/DocBook/genericirq
13 #include <linux/irq.h>
14 #include <linux/msi.h>
15 #include <linux/module.h>
16 #include <linux/interrupt.h>
17 #include <linux/kernel_stat.h>
18 #include <linux/irqdomain.h>
20 #include <trace/events/irq.h>
22 #include "internals.h"
24 static irqreturn_t bad_chained_irq(int irq, void *dev_id)
26 WARN_ONCE(1, "Chained irq %d should not call an action\n", irq);
31 * Chained handlers should never call action on their IRQ. This default
32 * action will emit warning if such thing happens.
34 struct irqaction chained_action = {
35 .handler = bad_chained_irq,
39 * irq_set_chip - set the irq chip for an irq
41 * @chip: pointer to irq chip description structure
43 int irq_set_chip(unsigned int irq, struct irq_chip *chip)
46 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
54 desc->irq_data.chip = chip;
55 irq_put_desc_unlock(desc, flags);
57 * For !CONFIG_SPARSE_IRQ make the irq show up in
63 EXPORT_SYMBOL(irq_set_chip);
66 * irq_set_type - set the irq trigger type for an irq
68 * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
70 int irq_set_irq_type(unsigned int irq, unsigned int type)
73 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
79 type &= IRQ_TYPE_SENSE_MASK;
80 ret = __irq_set_trigger(desc, type);
81 irq_put_desc_busunlock(desc, flags);
84 EXPORT_SYMBOL(irq_set_irq_type);
87 * irq_set_handler_data - set irq handler data for an irq
88 * @irq: Interrupt number
89 * @data: Pointer to interrupt specific data
91 * Set the hardware irq controller data for an irq
93 int irq_set_handler_data(unsigned int irq, void *data)
96 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
100 desc->irq_common_data.handler_data = data;
101 irq_put_desc_unlock(desc, flags);
104 EXPORT_SYMBOL(irq_set_handler_data);
107 * irq_set_msi_desc_off - set MSI descriptor data for an irq at offset
108 * @irq_base: Interrupt number base
109 * @irq_offset: Interrupt number offset
110 * @entry: Pointer to MSI descriptor data
112 * Set the MSI descriptor entry for an irq at offset
114 int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
115 struct msi_desc *entry)
118 struct irq_desc *desc = irq_get_desc_lock(irq_base + irq_offset, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
122 desc->irq_common_data.msi_desc = entry;
123 if (entry && !irq_offset)
124 entry->irq = irq_base;
125 irq_put_desc_unlock(desc, flags);
130 * irq_set_msi_desc - set MSI descriptor data for an irq
131 * @irq: Interrupt number
132 * @entry: Pointer to MSI descriptor data
134 * Set the MSI descriptor entry for an irq
136 int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
138 return irq_set_msi_desc_off(irq, 0, entry);
142 * irq_set_chip_data - set irq chip data for an irq
143 * @irq: Interrupt number
144 * @data: Pointer to chip specific data
146 * Set the hardware irq chip data for an irq
148 int irq_set_chip_data(unsigned int irq, void *data)
151 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
155 desc->irq_data.chip_data = data;
156 irq_put_desc_unlock(desc, flags);
159 EXPORT_SYMBOL(irq_set_chip_data);
161 struct irq_data *irq_get_irq_data(unsigned int irq)
163 struct irq_desc *desc = irq_to_desc(irq);
165 return desc ? &desc->irq_data : NULL;
167 EXPORT_SYMBOL_GPL(irq_get_irq_data);
169 static void irq_state_clr_disabled(struct irq_desc *desc)
171 irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);
174 static void irq_state_set_disabled(struct irq_desc *desc)
176 irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
179 static void irq_state_clr_masked(struct irq_desc *desc)
181 irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED);
184 static void irq_state_set_masked(struct irq_desc *desc)
186 irqd_set(&desc->irq_data, IRQD_IRQ_MASKED);
189 int irq_startup(struct irq_desc *desc, bool resend)
193 irq_state_clr_disabled(desc);
196 irq_domain_activate_irq(&desc->irq_data);
197 if (desc->irq_data.chip->irq_startup) {
198 ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
199 irq_state_clr_masked(desc);
204 check_irq_resend(desc);
208 void irq_shutdown(struct irq_desc *desc)
210 irq_state_set_disabled(desc);
212 if (desc->irq_data.chip->irq_shutdown)
213 desc->irq_data.chip->irq_shutdown(&desc->irq_data);
214 else if (desc->irq_data.chip->irq_disable)
215 desc->irq_data.chip->irq_disable(&desc->irq_data);
217 desc->irq_data.chip->irq_mask(&desc->irq_data);
218 irq_domain_deactivate_irq(&desc->irq_data);
219 irq_state_set_masked(desc);
222 void irq_enable(struct irq_desc *desc)
224 irq_state_clr_disabled(desc);
225 if (desc->irq_data.chip->irq_enable)
226 desc->irq_data.chip->irq_enable(&desc->irq_data);
228 desc->irq_data.chip->irq_unmask(&desc->irq_data);
229 irq_state_clr_masked(desc);
233 * irq_disable - Mark interrupt disabled
234 * @desc: irq descriptor which should be disabled
236 * If the chip does not implement the irq_disable callback, we
237 * use a lazy disable approach. That means we mark the interrupt
238 * disabled, but leave the hardware unmasked. That's an
239 * optimization because we avoid the hardware access for the
240 * common case where no interrupt happens after we marked it
241 * disabled. If an interrupt happens, then the interrupt flow
242 * handler masks the line at the hardware level and marks it
245 * If the interrupt chip does not implement the irq_disable callback,
246 * a driver can disable the lazy approach for a particular irq line by
247 * calling 'irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY)'. This can
248 * be used for devices which cannot disable the interrupt at the
249 * device level under certain circumstances and have to use
250 * disable_irq[_nosync] instead.
252 void irq_disable(struct irq_desc *desc)
254 irq_state_set_disabled(desc);
255 if (desc->irq_data.chip->irq_disable) {
256 desc->irq_data.chip->irq_disable(&desc->irq_data);
257 irq_state_set_masked(desc);
258 } else if (irq_settings_disable_unlazy(desc)) {
263 void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
265 if (desc->irq_data.chip->irq_enable)
266 desc->irq_data.chip->irq_enable(&desc->irq_data);
268 desc->irq_data.chip->irq_unmask(&desc->irq_data);
269 cpumask_set_cpu(cpu, desc->percpu_enabled);
272 void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
274 if (desc->irq_data.chip->irq_disable)
275 desc->irq_data.chip->irq_disable(&desc->irq_data);
277 desc->irq_data.chip->irq_mask(&desc->irq_data);
278 cpumask_clear_cpu(cpu, desc->percpu_enabled);
281 static inline void mask_ack_irq(struct irq_desc *desc)
283 if (desc->irq_data.chip->irq_mask_ack)
284 desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
286 desc->irq_data.chip->irq_mask(&desc->irq_data);
287 if (desc->irq_data.chip->irq_ack)
288 desc->irq_data.chip->irq_ack(&desc->irq_data);
290 irq_state_set_masked(desc);
293 void mask_irq(struct irq_desc *desc)
295 if (desc->irq_data.chip->irq_mask) {
296 desc->irq_data.chip->irq_mask(&desc->irq_data);
297 irq_state_set_masked(desc);
301 void unmask_irq(struct irq_desc *desc)
303 if (desc->irq_data.chip->irq_unmask) {
304 desc->irq_data.chip->irq_unmask(&desc->irq_data);
305 irq_state_clr_masked(desc);
309 void unmask_threaded_irq(struct irq_desc *desc)
311 struct irq_chip *chip = desc->irq_data.chip;
313 if (chip->flags & IRQCHIP_EOI_THREADED)
314 chip->irq_eoi(&desc->irq_data);
316 if (chip->irq_unmask) {
317 chip->irq_unmask(&desc->irq_data);
318 irq_state_clr_masked(desc);
323 * handle_nested_irq - Handle a nested irq from a irq thread
324 * @irq: the interrupt number
326 * Handle interrupts which are nested into a threaded interrupt
327 * handler. The handler function is called inside the calling
330 void handle_nested_irq(unsigned int irq)
332 struct irq_desc *desc = irq_to_desc(irq);
333 struct irqaction *action;
334 irqreturn_t action_ret;
338 raw_spin_lock_irq(&desc->lock);
340 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
342 action = desc->action;
343 if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) {
344 desc->istate |= IRQS_PENDING;
348 kstat_incr_irqs_this_cpu(desc);
349 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
350 raw_spin_unlock_irq(&desc->lock);
352 action_ret = action->thread_fn(action->irq, action->dev_id);
354 note_interrupt(desc, action_ret);
356 raw_spin_lock_irq(&desc->lock);
357 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
360 raw_spin_unlock_irq(&desc->lock);
362 EXPORT_SYMBOL_GPL(handle_nested_irq);
364 static bool irq_check_poll(struct irq_desc *desc)
366 if (!(desc->istate & IRQS_POLL_INPROGRESS))
368 return irq_wait_for_poll(desc);
371 static bool irq_may_run(struct irq_desc *desc)
373 unsigned int mask = IRQD_IRQ_INPROGRESS | IRQD_WAKEUP_ARMED;
376 * If the interrupt is not in progress and is not an armed
377 * wakeup interrupt, proceed.
379 if (!irqd_has_set(&desc->irq_data, mask))
383 * If the interrupt is an armed wakeup source, mark it pending
384 * and suspended, disable it and notify the pm core about the
387 if (irq_pm_check_wakeup(desc))
391 * Handle a potential concurrent poll on a different core.
393 return irq_check_poll(desc);
397 * handle_simple_irq - Simple and software-decoded IRQs.
398 * @desc: the interrupt description structure for this irq
400 * Simple interrupts are either sent from a demultiplexing interrupt
401 * handler or come from hardware, where no interrupt hardware control
404 * Note: The caller is expected to handle the ack, clear, mask and
405 * unmask issues if necessary.
407 void handle_simple_irq(struct irq_desc *desc)
409 raw_spin_lock(&desc->lock);
411 if (!irq_may_run(desc))
414 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
416 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
417 desc->istate |= IRQS_PENDING;
421 kstat_incr_irqs_this_cpu(desc);
422 handle_irq_event(desc);
425 raw_spin_unlock(&desc->lock);
427 EXPORT_SYMBOL_GPL(handle_simple_irq);
430 * handle_untracked_irq - Simple and software-decoded IRQs.
431 * @desc: the interrupt description structure for this irq
433 * Untracked interrupts are sent from a demultiplexing interrupt
434 * handler when the demultiplexer does not know which device it its
435 * multiplexed irq domain generated the interrupt. IRQ's handled
436 * through here are not subjected to stats tracking, randomness, or
437 * spurious interrupt detection.
439 * Note: Like handle_simple_irq, the caller is expected to handle
440 * the ack, clear, mask and unmask issues if necessary.
442 void handle_untracked_irq(struct irq_desc *desc)
444 unsigned int flags = 0;
446 raw_spin_lock(&desc->lock);
448 if (!irq_may_run(desc))
451 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
453 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
454 desc->istate |= IRQS_PENDING;
458 desc->istate &= ~IRQS_PENDING;
459 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
460 raw_spin_unlock(&desc->lock);
462 __handle_irq_event_percpu(desc, &flags);
464 raw_spin_lock(&desc->lock);
465 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
468 raw_spin_unlock(&desc->lock);
470 EXPORT_SYMBOL_GPL(handle_untracked_irq);
473 * Called unconditionally from handle_level_irq() and only for oneshot
474 * interrupts from handle_fasteoi_irq()
476 static void cond_unmask_irq(struct irq_desc *desc)
479 * We need to unmask in the following cases:
480 * - Standard level irq (IRQF_ONESHOT is not set)
481 * - Oneshot irq which did not wake the thread (caused by a
482 * spurious interrupt or a primary handler handling it
485 if (!irqd_irq_disabled(&desc->irq_data) &&
486 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)
491 * handle_level_irq - Level type irq handler
492 * @desc: the interrupt description structure for this irq
494 * Level type interrupts are active as long as the hardware line has
495 * the active level. This may require to mask the interrupt and unmask
496 * it after the associated handler has acknowledged the device, so the
497 * interrupt line is back to inactive.
499 void handle_level_irq(struct irq_desc *desc)
501 raw_spin_lock(&desc->lock);
504 if (!irq_may_run(desc))
507 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
510 * If its disabled or no action available
511 * keep it masked and get out of here
513 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
514 desc->istate |= IRQS_PENDING;
518 kstat_incr_irqs_this_cpu(desc);
519 handle_irq_event(desc);
521 cond_unmask_irq(desc);
524 raw_spin_unlock(&desc->lock);
526 EXPORT_SYMBOL_GPL(handle_level_irq);
528 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
529 static inline void preflow_handler(struct irq_desc *desc)
531 if (desc->preflow_handler)
532 desc->preflow_handler(&desc->irq_data);
535 static inline void preflow_handler(struct irq_desc *desc) { }
538 static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
540 if (!(desc->istate & IRQS_ONESHOT)) {
541 chip->irq_eoi(&desc->irq_data);
545 * We need to unmask in the following cases:
546 * - Oneshot irq which did not wake the thread (caused by a
547 * spurious interrupt or a primary handler handling it
550 if (!irqd_irq_disabled(&desc->irq_data) &&
551 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) {
552 chip->irq_eoi(&desc->irq_data);
554 } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) {
555 chip->irq_eoi(&desc->irq_data);
560 * handle_fasteoi_irq - irq handler for transparent controllers
561 * @desc: the interrupt description structure for this irq
563 * Only a single callback will be issued to the chip: an ->eoi()
564 * call when the interrupt has been serviced. This enables support
565 * for modern forms of interrupt handlers, which handle the flow
566 * details in hardware, transparently.
568 void handle_fasteoi_irq(struct irq_desc *desc)
570 struct irq_chip *chip = desc->irq_data.chip;
572 raw_spin_lock(&desc->lock);
574 if (!irq_may_run(desc))
577 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
580 * If its disabled or no action available
581 * then mask it and get out of here:
583 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
584 desc->istate |= IRQS_PENDING;
589 kstat_incr_irqs_this_cpu(desc);
590 if (desc->istate & IRQS_ONESHOT)
593 preflow_handler(desc);
594 handle_irq_event(desc);
596 cond_unmask_eoi_irq(desc, chip);
598 raw_spin_unlock(&desc->lock);
601 if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
602 chip->irq_eoi(&desc->irq_data);
603 raw_spin_unlock(&desc->lock);
605 EXPORT_SYMBOL_GPL(handle_fasteoi_irq);
608 * handle_edge_irq - edge type IRQ handler
609 * @desc: the interrupt description structure for this irq
611 * Interrupt occures on the falling and/or rising edge of a hardware
612 * signal. The occurrence is latched into the irq controller hardware
613 * and must be acked in order to be reenabled. After the ack another
614 * interrupt can happen on the same source even before the first one
615 * is handled by the associated event handler. If this happens it
616 * might be necessary to disable (mask) the interrupt depending on the
617 * controller hardware. This requires to reenable the interrupt inside
618 * of the loop which handles the interrupts which have arrived while
619 * the handler was running. If all pending interrupts are handled, the
622 void handle_edge_irq(struct irq_desc *desc)
624 raw_spin_lock(&desc->lock);
626 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
628 if (!irq_may_run(desc)) {
629 desc->istate |= IRQS_PENDING;
635 * If its disabled or no action available then mask it and get
638 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
639 desc->istate |= IRQS_PENDING;
644 kstat_incr_irqs_this_cpu(desc);
646 /* Start handling the irq */
647 desc->irq_data.chip->irq_ack(&desc->irq_data);
650 if (unlikely(!desc->action)) {
656 * When another irq arrived while we were handling
657 * one, we could have masked the irq.
658 * Renable it, if it was not disabled in meantime.
660 if (unlikely(desc->istate & IRQS_PENDING)) {
661 if (!irqd_irq_disabled(&desc->irq_data) &&
662 irqd_irq_masked(&desc->irq_data))
666 handle_irq_event(desc);
668 } while ((desc->istate & IRQS_PENDING) &&
669 !irqd_irq_disabled(&desc->irq_data));
672 raw_spin_unlock(&desc->lock);
674 EXPORT_SYMBOL(handle_edge_irq);
676 #ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
678 * handle_edge_eoi_irq - edge eoi type IRQ handler
679 * @desc: the interrupt description structure for this irq
681 * Similar as the above handle_edge_irq, but using eoi and w/o the
684 void handle_edge_eoi_irq(struct irq_desc *desc)
686 struct irq_chip *chip = irq_desc_get_chip(desc);
688 raw_spin_lock(&desc->lock);
690 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
692 if (!irq_may_run(desc)) {
693 desc->istate |= IRQS_PENDING;
698 * If its disabled or no action available then mask it and get
701 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
702 desc->istate |= IRQS_PENDING;
706 kstat_incr_irqs_this_cpu(desc);
709 if (unlikely(!desc->action))
712 handle_irq_event(desc);
714 } while ((desc->istate & IRQS_PENDING) &&
715 !irqd_irq_disabled(&desc->irq_data));
718 chip->irq_eoi(&desc->irq_data);
719 raw_spin_unlock(&desc->lock);
724 * handle_percpu_irq - Per CPU local irq handler
725 * @desc: the interrupt description structure for this irq
727 * Per CPU interrupts on SMP machines without locking requirements
729 void handle_percpu_irq(struct irq_desc *desc)
731 struct irq_chip *chip = irq_desc_get_chip(desc);
733 kstat_incr_irqs_this_cpu(desc);
736 chip->irq_ack(&desc->irq_data);
738 handle_irq_event_percpu(desc);
741 chip->irq_eoi(&desc->irq_data);
745 * handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
746 * @desc: the interrupt description structure for this irq
748 * Per CPU interrupts on SMP machines without locking requirements. Same as
749 * handle_percpu_irq() above but with the following extras:
751 * action->percpu_dev_id is a pointer to percpu variables which
752 * contain the real device id for the cpu on which this handler is
755 void handle_percpu_devid_irq(struct irq_desc *desc)
757 struct irq_chip *chip = irq_desc_get_chip(desc);
758 struct irqaction *action = desc->action;
759 void *dev_id = raw_cpu_ptr(action->percpu_dev_id);
760 unsigned int irq = irq_desc_get_irq(desc);
763 kstat_incr_irqs_this_cpu(desc);
766 chip->irq_ack(&desc->irq_data);
768 trace_irq_handler_entry(irq, action);
769 res = action->handler(irq, dev_id);
770 trace_irq_handler_exit(irq, action, res);
773 chip->irq_eoi(&desc->irq_data);
777 __irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
778 int is_chained, const char *name)
781 handle = handle_bad_irq;
783 struct irq_data *irq_data = &desc->irq_data;
784 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
786 * With hierarchical domains we might run into a
787 * situation where the outermost chip is not yet set
788 * up, but the inner chips are there. Instead of
789 * bailing we install the handler, but obviously we
790 * cannot enable/startup the interrupt at this point.
793 if (irq_data->chip != &no_irq_chip)
796 * Bail out if the outer chip is not set up
797 * and the interrrupt supposed to be started
800 if (WARN_ON(is_chained))
803 irq_data = irq_data->parent_data;
806 if (WARN_ON(!irq_data || irq_data->chip == &no_irq_chip))
811 if (handle == handle_bad_irq) {
812 if (desc->irq_data.chip != &no_irq_chip)
814 irq_state_set_disabled(desc);
819 desc->handle_irq = handle;
822 if (handle != handle_bad_irq && is_chained) {
823 unsigned int type = irqd_get_trigger_type(&desc->irq_data);
826 * We're about to start this interrupt immediately,
827 * hence the need to set the trigger configuration.
828 * But the .set_type callback may have overridden the
829 * flow handler, ignoring that we're dealing with a
830 * chained interrupt. Reset it immediately because we
833 if (type != IRQ_TYPE_NONE) {
834 __irq_set_trigger(desc, type);
835 desc->handle_irq = handle;
838 irq_settings_set_noprobe(desc);
839 irq_settings_set_norequest(desc);
840 irq_settings_set_nothread(desc);
841 desc->action = &chained_action;
842 irq_startup(desc, true);
847 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
851 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
856 __irq_do_set_handler(desc, handle, is_chained, name);
857 irq_put_desc_busunlock(desc, flags);
859 EXPORT_SYMBOL_GPL(__irq_set_handler);
862 irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
866 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
871 __irq_do_set_handler(desc, handle, 1, NULL);
872 desc->irq_common_data.handler_data = data;
874 irq_put_desc_busunlock(desc, flags);
876 EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data);
879 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
880 irq_flow_handler_t handle, const char *name)
882 irq_set_chip(irq, chip);
883 __irq_set_handler(irq, handle, 0, name);
885 EXPORT_SYMBOL_GPL(irq_set_chip_and_handler_name);
887 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
890 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
894 irq_settings_clr_and_set(desc, clr, set);
896 irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
897 IRQD_TRIGGER_MASK | IRQD_LEVEL | IRQD_MOVE_PCNTXT);
898 if (irq_settings_has_no_balance_set(desc))
899 irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
900 if (irq_settings_is_per_cpu(desc))
901 irqd_set(&desc->irq_data, IRQD_PER_CPU);
902 if (irq_settings_can_move_pcntxt(desc))
903 irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT);
904 if (irq_settings_is_level(desc))
905 irqd_set(&desc->irq_data, IRQD_LEVEL);
907 irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc));
909 irq_put_desc_unlock(desc, flags);
911 EXPORT_SYMBOL_GPL(irq_modify_status);
914 * irq_cpu_online - Invoke all irq_cpu_online functions.
916 * Iterate through all irqs and invoke the chip.irq_cpu_online()
919 void irq_cpu_online(void)
921 struct irq_desc *desc;
922 struct irq_chip *chip;
926 for_each_active_irq(irq) {
927 desc = irq_to_desc(irq);
931 raw_spin_lock_irqsave(&desc->lock, flags);
933 chip = irq_data_get_irq_chip(&desc->irq_data);
934 if (chip && chip->irq_cpu_online &&
935 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
936 !irqd_irq_disabled(&desc->irq_data)))
937 chip->irq_cpu_online(&desc->irq_data);
939 raw_spin_unlock_irqrestore(&desc->lock, flags);
944 * irq_cpu_offline - Invoke all irq_cpu_offline functions.
946 * Iterate through all irqs and invoke the chip.irq_cpu_offline()
949 void irq_cpu_offline(void)
951 struct irq_desc *desc;
952 struct irq_chip *chip;
956 for_each_active_irq(irq) {
957 desc = irq_to_desc(irq);
961 raw_spin_lock_irqsave(&desc->lock, flags);
963 chip = irq_data_get_irq_chip(&desc->irq_data);
964 if (chip && chip->irq_cpu_offline &&
965 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
966 !irqd_irq_disabled(&desc->irq_data)))
967 chip->irq_cpu_offline(&desc->irq_data);
969 raw_spin_unlock_irqrestore(&desc->lock, flags);
973 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
975 * irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if
977 * @data: Pointer to interrupt specific data
979 void irq_chip_enable_parent(struct irq_data *data)
981 data = data->parent_data;
982 if (data->chip->irq_enable)
983 data->chip->irq_enable(data);
985 data->chip->irq_unmask(data);
989 * irq_chip_disable_parent - Disable the parent interrupt (defaults to mask if
991 * @data: Pointer to interrupt specific data
993 void irq_chip_disable_parent(struct irq_data *data)
995 data = data->parent_data;
996 if (data->chip->irq_disable)
997 data->chip->irq_disable(data);
999 data->chip->irq_mask(data);
1003 * irq_chip_ack_parent - Acknowledge the parent interrupt
1004 * @data: Pointer to interrupt specific data
1006 void irq_chip_ack_parent(struct irq_data *data)
1008 data = data->parent_data;
1009 data->chip->irq_ack(data);
1011 EXPORT_SYMBOL_GPL(irq_chip_ack_parent);
1014 * irq_chip_mask_parent - Mask the parent interrupt
1015 * @data: Pointer to interrupt specific data
1017 void irq_chip_mask_parent(struct irq_data *data)
1019 data = data->parent_data;
1020 data->chip->irq_mask(data);
1022 EXPORT_SYMBOL_GPL(irq_chip_mask_parent);
1025 * irq_chip_unmask_parent - Unmask the parent interrupt
1026 * @data: Pointer to interrupt specific data
1028 void irq_chip_unmask_parent(struct irq_data *data)
1030 data = data->parent_data;
1031 data->chip->irq_unmask(data);
1033 EXPORT_SYMBOL_GPL(irq_chip_unmask_parent);
1036 * irq_chip_eoi_parent - Invoke EOI on the parent interrupt
1037 * @data: Pointer to interrupt specific data
1039 void irq_chip_eoi_parent(struct irq_data *data)
1041 data = data->parent_data;
1042 data->chip->irq_eoi(data);
1044 EXPORT_SYMBOL_GPL(irq_chip_eoi_parent);
1047 * irq_chip_set_affinity_parent - Set affinity on the parent interrupt
1048 * @data: Pointer to interrupt specific data
1049 * @dest: The affinity mask to set
1050 * @force: Flag to enforce setting (disable online checks)
1052 * Conditinal, as the underlying parent chip might not implement it.
1054 int irq_chip_set_affinity_parent(struct irq_data *data,
1055 const struct cpumask *dest, bool force)
1057 data = data->parent_data;
1058 if (data->chip->irq_set_affinity)
1059 return data->chip->irq_set_affinity(data, dest, force);
1065 * irq_chip_set_type_parent - Set IRQ type on the parent interrupt
1066 * @data: Pointer to interrupt specific data
1067 * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
1069 * Conditional, as the underlying parent chip might not implement it.
1071 int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
1073 data = data->parent_data;
1075 if (data->chip->irq_set_type)
1076 return data->chip->irq_set_type(data, type);
1080 EXPORT_SYMBOL_GPL(irq_chip_set_type_parent);
1083 * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
1084 * @data: Pointer to interrupt specific data
1086 * Iterate through the domain hierarchy of the interrupt and check
1087 * whether a hw retrigger function exists. If yes, invoke it.
1089 int irq_chip_retrigger_hierarchy(struct irq_data *data)
1091 for (data = data->parent_data; data; data = data->parent_data)
1092 if (data->chip && data->chip->irq_retrigger)
1093 return data->chip->irq_retrigger(data);
1099 * irq_chip_set_vcpu_affinity_parent - Set vcpu affinity on the parent interrupt
1100 * @data: Pointer to interrupt specific data
1101 * @vcpu_info: The vcpu affinity information
1103 int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info)
1105 data = data->parent_data;
1106 if (data->chip->irq_set_vcpu_affinity)
1107 return data->chip->irq_set_vcpu_affinity(data, vcpu_info);
1113 * irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
1114 * @data: Pointer to interrupt specific data
1115 * @on: Whether to set or reset the wake-up capability of this irq
1117 * Conditional, as the underlying parent chip might not implement it.
1119 int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
1121 data = data->parent_data;
1122 if (data->chip->irq_set_wake)
1123 return data->chip->irq_set_wake(data, on);
1130 * irq_chip_compose_msi_msg - Componse msi message for a irq chip
1131 * @data: Pointer to interrupt specific data
1132 * @msg: Pointer to the MSI message
1134 * For hierarchical domains we find the first chip in the hierarchy
1135 * which implements the irq_compose_msi_msg callback. For non
1136 * hierarchical we use the top level chip.
1138 int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
1140 struct irq_data *pos = NULL;
1142 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1143 for (; data; data = data->parent_data)
1145 if (data->chip && data->chip->irq_compose_msi_msg)
1150 pos->chip->irq_compose_msi_msg(pos, msg);
1156 * irq_chip_pm_get - Enable power for an IRQ chip
1157 * @data: Pointer to interrupt specific data
1159 * Enable the power to the IRQ chip referenced by the interrupt data
1162 int irq_chip_pm_get(struct irq_data *data)
1166 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
1167 retval = pm_runtime_get_sync(data->chip->parent_device);
1169 pm_runtime_put_noidle(data->chip->parent_device);
1178 * irq_chip_pm_put - Disable power for an IRQ chip
1179 * @data: Pointer to interrupt specific data
1181 * Disable the power to the IRQ chip referenced by the interrupt data
1182 * structure, belongs. Note that power will only be disabled, once this
1183 * function has been called for all IRQs that have called irq_chip_pm_get().
1185 int irq_chip_pm_put(struct irq_data *data)
1189 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
1190 retval = pm_runtime_put(data->chip->parent_device);
1192 return (retval < 0) ? retval : 0;