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 ret = __irq_set_trigger(desc, type);
80 irq_put_desc_busunlock(desc, flags);
83 EXPORT_SYMBOL(irq_set_irq_type);
86 * irq_set_handler_data - set irq handler data for an irq
87 * @irq: Interrupt number
88 * @data: Pointer to interrupt specific data
90 * Set the hardware irq controller data for an irq
92 int irq_set_handler_data(unsigned int irq, void *data)
95 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
99 desc->irq_common_data.handler_data = data;
100 irq_put_desc_unlock(desc, flags);
103 EXPORT_SYMBOL(irq_set_handler_data);
106 * irq_set_msi_desc_off - set MSI descriptor data for an irq at offset
107 * @irq_base: Interrupt number base
108 * @irq_offset: Interrupt number offset
109 * @entry: Pointer to MSI descriptor data
111 * Set the MSI descriptor entry for an irq at offset
113 int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
114 struct msi_desc *entry)
117 struct irq_desc *desc = irq_get_desc_lock(irq_base + irq_offset, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
121 desc->irq_common_data.msi_desc = entry;
122 if (entry && !irq_offset)
123 entry->irq = irq_base;
124 irq_put_desc_unlock(desc, flags);
129 * irq_set_msi_desc - set MSI descriptor data for an irq
130 * @irq: Interrupt number
131 * @entry: Pointer to MSI descriptor data
133 * Set the MSI descriptor entry for an irq
135 int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
137 return irq_set_msi_desc_off(irq, 0, entry);
141 * irq_set_chip_data - set irq chip data for an irq
142 * @irq: Interrupt number
143 * @data: Pointer to chip specific data
145 * Set the hardware irq chip data for an irq
147 int irq_set_chip_data(unsigned int irq, void *data)
150 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
154 desc->irq_data.chip_data = data;
155 irq_put_desc_unlock(desc, flags);
158 EXPORT_SYMBOL(irq_set_chip_data);
160 struct irq_data *irq_get_irq_data(unsigned int irq)
162 struct irq_desc *desc = irq_to_desc(irq);
164 return desc ? &desc->irq_data : NULL;
166 EXPORT_SYMBOL_GPL(irq_get_irq_data);
168 static void irq_state_clr_disabled(struct irq_desc *desc)
170 irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);
173 static void irq_state_set_disabled(struct irq_desc *desc)
175 irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
178 static void irq_state_clr_masked(struct irq_desc *desc)
180 irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED);
183 static void irq_state_set_masked(struct irq_desc *desc)
185 irqd_set(&desc->irq_data, IRQD_IRQ_MASKED);
188 int irq_startup(struct irq_desc *desc, bool resend)
192 irq_state_clr_disabled(desc);
195 irq_domain_activate_irq(&desc->irq_data);
196 if (desc->irq_data.chip->irq_startup) {
197 ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
198 irq_state_clr_masked(desc);
203 check_irq_resend(desc);
207 void irq_shutdown(struct irq_desc *desc)
209 irq_state_set_disabled(desc);
211 if (desc->irq_data.chip->irq_shutdown)
212 desc->irq_data.chip->irq_shutdown(&desc->irq_data);
213 else if (desc->irq_data.chip->irq_disable)
214 desc->irq_data.chip->irq_disable(&desc->irq_data);
216 desc->irq_data.chip->irq_mask(&desc->irq_data);
217 irq_domain_deactivate_irq(&desc->irq_data);
218 irq_state_set_masked(desc);
221 void irq_enable(struct irq_desc *desc)
223 irq_state_clr_disabled(desc);
224 if (desc->irq_data.chip->irq_enable)
225 desc->irq_data.chip->irq_enable(&desc->irq_data);
227 desc->irq_data.chip->irq_unmask(&desc->irq_data);
228 irq_state_clr_masked(desc);
232 * irq_disable - Mark interrupt disabled
233 * @desc: irq descriptor which should be disabled
235 * If the chip does not implement the irq_disable callback, we
236 * use a lazy disable approach. That means we mark the interrupt
237 * disabled, but leave the hardware unmasked. That's an
238 * optimization because we avoid the hardware access for the
239 * common case where no interrupt happens after we marked it
240 * disabled. If an interrupt happens, then the interrupt flow
241 * handler masks the line at the hardware level and marks it
244 * If the interrupt chip does not implement the irq_disable callback,
245 * a driver can disable the lazy approach for a particular irq line by
246 * calling 'irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY)'. This can
247 * be used for devices which cannot disable the interrupt at the
248 * device level under certain circumstances and have to use
249 * disable_irq[_nosync] instead.
251 void irq_disable(struct irq_desc *desc)
253 irq_state_set_disabled(desc);
254 if (desc->irq_data.chip->irq_disable) {
255 desc->irq_data.chip->irq_disable(&desc->irq_data);
256 irq_state_set_masked(desc);
257 } else if (irq_settings_disable_unlazy(desc)) {
262 void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
264 if (desc->irq_data.chip->irq_enable)
265 desc->irq_data.chip->irq_enable(&desc->irq_data);
267 desc->irq_data.chip->irq_unmask(&desc->irq_data);
268 cpumask_set_cpu(cpu, desc->percpu_enabled);
271 void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
273 if (desc->irq_data.chip->irq_disable)
274 desc->irq_data.chip->irq_disable(&desc->irq_data);
276 desc->irq_data.chip->irq_mask(&desc->irq_data);
277 cpumask_clear_cpu(cpu, desc->percpu_enabled);
280 static inline void mask_ack_irq(struct irq_desc *desc)
282 if (desc->irq_data.chip->irq_mask_ack)
283 desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
285 desc->irq_data.chip->irq_mask(&desc->irq_data);
286 if (desc->irq_data.chip->irq_ack)
287 desc->irq_data.chip->irq_ack(&desc->irq_data);
289 irq_state_set_masked(desc);
292 void mask_irq(struct irq_desc *desc)
294 if (desc->irq_data.chip->irq_mask) {
295 desc->irq_data.chip->irq_mask(&desc->irq_data);
296 irq_state_set_masked(desc);
300 void unmask_irq(struct irq_desc *desc)
302 if (desc->irq_data.chip->irq_unmask) {
303 desc->irq_data.chip->irq_unmask(&desc->irq_data);
304 irq_state_clr_masked(desc);
308 void unmask_threaded_irq(struct irq_desc *desc)
310 struct irq_chip *chip = desc->irq_data.chip;
312 if (chip->flags & IRQCHIP_EOI_THREADED)
313 chip->irq_eoi(&desc->irq_data);
315 if (chip->irq_unmask) {
316 chip->irq_unmask(&desc->irq_data);
317 irq_state_clr_masked(desc);
322 * handle_nested_irq - Handle a nested irq from a irq thread
323 * @irq: the interrupt number
325 * Handle interrupts which are nested into a threaded interrupt
326 * handler. The handler function is called inside the calling
329 void handle_nested_irq(unsigned int irq)
331 struct irq_desc *desc = irq_to_desc(irq);
332 struct irqaction *action;
333 irqreturn_t action_ret;
337 raw_spin_lock_irq(&desc->lock);
339 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
341 action = desc->action;
342 if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) {
343 desc->istate |= IRQS_PENDING;
347 kstat_incr_irqs_this_cpu(desc);
348 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
349 raw_spin_unlock_irq(&desc->lock);
351 action_ret = IRQ_NONE;
352 for_each_action_of_desc(desc, action)
353 action_ret |= action->thread_fn(action->irq, action->dev_id);
356 note_interrupt(desc, action_ret);
358 raw_spin_lock_irq(&desc->lock);
359 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
362 raw_spin_unlock_irq(&desc->lock);
364 EXPORT_SYMBOL_GPL(handle_nested_irq);
366 static bool irq_check_poll(struct irq_desc *desc)
368 if (!(desc->istate & IRQS_POLL_INPROGRESS))
370 return irq_wait_for_poll(desc);
373 static bool irq_may_run(struct irq_desc *desc)
375 unsigned int mask = IRQD_IRQ_INPROGRESS | IRQD_WAKEUP_ARMED;
378 * If the interrupt is not in progress and is not an armed
379 * wakeup interrupt, proceed.
381 if (!irqd_has_set(&desc->irq_data, mask))
385 * If the interrupt is an armed wakeup source, mark it pending
386 * and suspended, disable it and notify the pm core about the
389 if (irq_pm_check_wakeup(desc))
393 * Handle a potential concurrent poll on a different core.
395 return irq_check_poll(desc);
399 * handle_simple_irq - Simple and software-decoded IRQs.
400 * @desc: the interrupt description structure for this irq
402 * Simple interrupts are either sent from a demultiplexing interrupt
403 * handler or come from hardware, where no interrupt hardware control
406 * Note: The caller is expected to handle the ack, clear, mask and
407 * unmask issues if necessary.
409 void handle_simple_irq(struct irq_desc *desc)
411 raw_spin_lock(&desc->lock);
413 if (!irq_may_run(desc))
416 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
418 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
419 desc->istate |= IRQS_PENDING;
423 kstat_incr_irqs_this_cpu(desc);
424 handle_irq_event(desc);
427 raw_spin_unlock(&desc->lock);
429 EXPORT_SYMBOL_GPL(handle_simple_irq);
432 * handle_untracked_irq - Simple and software-decoded IRQs.
433 * @desc: the interrupt description structure for this irq
435 * Untracked interrupts are sent from a demultiplexing interrupt
436 * handler when the demultiplexer does not know which device it its
437 * multiplexed irq domain generated the interrupt. IRQ's handled
438 * through here are not subjected to stats tracking, randomness, or
439 * spurious interrupt detection.
441 * Note: Like handle_simple_irq, the caller is expected to handle
442 * the ack, clear, mask and unmask issues if necessary.
444 void handle_untracked_irq(struct irq_desc *desc)
446 unsigned int flags = 0;
448 raw_spin_lock(&desc->lock);
450 if (!irq_may_run(desc))
453 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
455 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
456 desc->istate |= IRQS_PENDING;
460 desc->istate &= ~IRQS_PENDING;
461 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
462 raw_spin_unlock(&desc->lock);
464 __handle_irq_event_percpu(desc, &flags);
466 raw_spin_lock(&desc->lock);
467 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
470 raw_spin_unlock(&desc->lock);
472 EXPORT_SYMBOL_GPL(handle_untracked_irq);
475 * Called unconditionally from handle_level_irq() and only for oneshot
476 * interrupts from handle_fasteoi_irq()
478 static void cond_unmask_irq(struct irq_desc *desc)
481 * We need to unmask in the following cases:
482 * - Standard level irq (IRQF_ONESHOT is not set)
483 * - Oneshot irq which did not wake the thread (caused by a
484 * spurious interrupt or a primary handler handling it
487 if (!irqd_irq_disabled(&desc->irq_data) &&
488 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)
493 * handle_level_irq - Level type irq handler
494 * @desc: the interrupt description structure for this irq
496 * Level type interrupts are active as long as the hardware line has
497 * the active level. This may require to mask the interrupt and unmask
498 * it after the associated handler has acknowledged the device, so the
499 * interrupt line is back to inactive.
501 void handle_level_irq(struct irq_desc *desc)
503 raw_spin_lock(&desc->lock);
506 if (!irq_may_run(desc))
509 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
512 * If its disabled or no action available
513 * keep it masked and get out of here
515 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
516 desc->istate |= IRQS_PENDING;
520 kstat_incr_irqs_this_cpu(desc);
521 handle_irq_event(desc);
523 cond_unmask_irq(desc);
526 raw_spin_unlock(&desc->lock);
528 EXPORT_SYMBOL_GPL(handle_level_irq);
530 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
531 static inline void preflow_handler(struct irq_desc *desc)
533 if (desc->preflow_handler)
534 desc->preflow_handler(&desc->irq_data);
537 static inline void preflow_handler(struct irq_desc *desc) { }
540 static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
542 if (!(desc->istate & IRQS_ONESHOT)) {
543 chip->irq_eoi(&desc->irq_data);
547 * We need to unmask in the following cases:
548 * - Oneshot irq which did not wake the thread (caused by a
549 * spurious interrupt or a primary handler handling it
552 if (!irqd_irq_disabled(&desc->irq_data) &&
553 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) {
554 chip->irq_eoi(&desc->irq_data);
556 } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) {
557 chip->irq_eoi(&desc->irq_data);
562 * handle_fasteoi_irq - irq handler for transparent controllers
563 * @desc: the interrupt description structure for this irq
565 * Only a single callback will be issued to the chip: an ->eoi()
566 * call when the interrupt has been serviced. This enables support
567 * for modern forms of interrupt handlers, which handle the flow
568 * details in hardware, transparently.
570 void handle_fasteoi_irq(struct irq_desc *desc)
572 struct irq_chip *chip = desc->irq_data.chip;
574 raw_spin_lock(&desc->lock);
576 if (!irq_may_run(desc))
579 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
582 * If its disabled or no action available
583 * then mask it and get out of here:
585 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
586 desc->istate |= IRQS_PENDING;
591 kstat_incr_irqs_this_cpu(desc);
592 if (desc->istate & IRQS_ONESHOT)
595 preflow_handler(desc);
596 handle_irq_event(desc);
598 cond_unmask_eoi_irq(desc, chip);
600 raw_spin_unlock(&desc->lock);
603 if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
604 chip->irq_eoi(&desc->irq_data);
605 raw_spin_unlock(&desc->lock);
607 EXPORT_SYMBOL_GPL(handle_fasteoi_irq);
610 * handle_edge_irq - edge type IRQ handler
611 * @desc: the interrupt description structure for this irq
613 * Interrupt occures on the falling and/or rising edge of a hardware
614 * signal. The occurrence is latched into the irq controller hardware
615 * and must be acked in order to be reenabled. After the ack another
616 * interrupt can happen on the same source even before the first one
617 * is handled by the associated event handler. If this happens it
618 * might be necessary to disable (mask) the interrupt depending on the
619 * controller hardware. This requires to reenable the interrupt inside
620 * of the loop which handles the interrupts which have arrived while
621 * the handler was running. If all pending interrupts are handled, the
624 void handle_edge_irq(struct irq_desc *desc)
626 raw_spin_lock(&desc->lock);
628 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
630 if (!irq_may_run(desc)) {
631 desc->istate |= IRQS_PENDING;
637 * If its disabled or no action available then mask it and get
640 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
641 desc->istate |= IRQS_PENDING;
646 kstat_incr_irqs_this_cpu(desc);
648 /* Start handling the irq */
649 desc->irq_data.chip->irq_ack(&desc->irq_data);
652 if (unlikely(!desc->action)) {
658 * When another irq arrived while we were handling
659 * one, we could have masked the irq.
660 * Renable it, if it was not disabled in meantime.
662 if (unlikely(desc->istate & IRQS_PENDING)) {
663 if (!irqd_irq_disabled(&desc->irq_data) &&
664 irqd_irq_masked(&desc->irq_data))
668 handle_irq_event(desc);
670 } while ((desc->istate & IRQS_PENDING) &&
671 !irqd_irq_disabled(&desc->irq_data));
674 raw_spin_unlock(&desc->lock);
676 EXPORT_SYMBOL(handle_edge_irq);
678 #ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
680 * handle_edge_eoi_irq - edge eoi type IRQ handler
681 * @desc: the interrupt description structure for this irq
683 * Similar as the above handle_edge_irq, but using eoi and w/o the
686 void handle_edge_eoi_irq(struct irq_desc *desc)
688 struct irq_chip *chip = irq_desc_get_chip(desc);
690 raw_spin_lock(&desc->lock);
692 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
694 if (!irq_may_run(desc)) {
695 desc->istate |= IRQS_PENDING;
700 * If its disabled or no action available then mask it and get
703 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
704 desc->istate |= IRQS_PENDING;
708 kstat_incr_irqs_this_cpu(desc);
711 if (unlikely(!desc->action))
714 handle_irq_event(desc);
716 } while ((desc->istate & IRQS_PENDING) &&
717 !irqd_irq_disabled(&desc->irq_data));
720 chip->irq_eoi(&desc->irq_data);
721 raw_spin_unlock(&desc->lock);
726 * handle_percpu_irq - Per CPU local irq handler
727 * @desc: the interrupt description structure for this irq
729 * Per CPU interrupts on SMP machines without locking requirements
731 void handle_percpu_irq(struct irq_desc *desc)
733 struct irq_chip *chip = irq_desc_get_chip(desc);
735 kstat_incr_irqs_this_cpu(desc);
738 chip->irq_ack(&desc->irq_data);
740 handle_irq_event_percpu(desc);
743 chip->irq_eoi(&desc->irq_data);
747 * handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
748 * @desc: the interrupt description structure for this irq
750 * Per CPU interrupts on SMP machines without locking requirements. Same as
751 * handle_percpu_irq() above but with the following extras:
753 * action->percpu_dev_id is a pointer to percpu variables which
754 * contain the real device id for the cpu on which this handler is
757 void handle_percpu_devid_irq(struct irq_desc *desc)
759 struct irq_chip *chip = irq_desc_get_chip(desc);
760 struct irqaction *action = desc->action;
761 unsigned int irq = irq_desc_get_irq(desc);
764 kstat_incr_irqs_this_cpu(desc);
767 chip->irq_ack(&desc->irq_data);
769 if (likely(action)) {
770 trace_irq_handler_entry(irq, action);
771 res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
772 trace_irq_handler_exit(irq, action, res);
774 unsigned int cpu = smp_processor_id();
775 bool enabled = cpumask_test_cpu(cpu, desc->percpu_enabled);
778 irq_percpu_disable(desc, cpu);
780 pr_err_once("Spurious%s percpu IRQ%u on CPU%u\n",
781 enabled ? " and unmasked" : "", irq, cpu);
785 chip->irq_eoi(&desc->irq_data);
789 __irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
790 int is_chained, const char *name)
793 handle = handle_bad_irq;
795 struct irq_data *irq_data = &desc->irq_data;
796 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
798 * With hierarchical domains we might run into a
799 * situation where the outermost chip is not yet set
800 * up, but the inner chips are there. Instead of
801 * bailing we install the handler, but obviously we
802 * cannot enable/startup the interrupt at this point.
805 if (irq_data->chip != &no_irq_chip)
808 * Bail out if the outer chip is not set up
809 * and the interrrupt supposed to be started
812 if (WARN_ON(is_chained))
815 irq_data = irq_data->parent_data;
818 if (WARN_ON(!irq_data || irq_data->chip == &no_irq_chip))
823 if (handle == handle_bad_irq) {
824 if (desc->irq_data.chip != &no_irq_chip)
826 irq_state_set_disabled(desc);
831 desc->handle_irq = handle;
834 if (handle != handle_bad_irq && is_chained) {
835 unsigned int type = irqd_get_trigger_type(&desc->irq_data);
838 * We're about to start this interrupt immediately,
839 * hence the need to set the trigger configuration.
840 * But the .set_type callback may have overridden the
841 * flow handler, ignoring that we're dealing with a
842 * chained interrupt. Reset it immediately because we
845 if (type != IRQ_TYPE_NONE) {
846 __irq_set_trigger(desc, type);
847 desc->handle_irq = handle;
850 irq_settings_set_noprobe(desc);
851 irq_settings_set_norequest(desc);
852 irq_settings_set_nothread(desc);
853 desc->action = &chained_action;
854 irq_startup(desc, true);
859 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
863 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
868 __irq_do_set_handler(desc, handle, is_chained, name);
869 irq_put_desc_busunlock(desc, flags);
871 EXPORT_SYMBOL_GPL(__irq_set_handler);
874 irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
878 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
883 desc->irq_common_data.handler_data = data;
884 __irq_do_set_handler(desc, handle, 1, NULL);
886 irq_put_desc_busunlock(desc, flags);
888 EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data);
891 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
892 irq_flow_handler_t handle, const char *name)
894 irq_set_chip(irq, chip);
895 __irq_set_handler(irq, handle, 0, name);
897 EXPORT_SYMBOL_GPL(irq_set_chip_and_handler_name);
899 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
902 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
906 irq_settings_clr_and_set(desc, clr, set);
908 irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
909 IRQD_TRIGGER_MASK | IRQD_LEVEL | IRQD_MOVE_PCNTXT);
910 if (irq_settings_has_no_balance_set(desc))
911 irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
912 if (irq_settings_is_per_cpu(desc))
913 irqd_set(&desc->irq_data, IRQD_PER_CPU);
914 if (irq_settings_can_move_pcntxt(desc))
915 irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT);
916 if (irq_settings_is_level(desc))
917 irqd_set(&desc->irq_data, IRQD_LEVEL);
919 irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc));
921 irq_put_desc_unlock(desc, flags);
923 EXPORT_SYMBOL_GPL(irq_modify_status);
926 * irq_cpu_online - Invoke all irq_cpu_online functions.
928 * Iterate through all irqs and invoke the chip.irq_cpu_online()
931 void irq_cpu_online(void)
933 struct irq_desc *desc;
934 struct irq_chip *chip;
938 for_each_active_irq(irq) {
939 desc = irq_to_desc(irq);
943 raw_spin_lock_irqsave(&desc->lock, flags);
945 chip = irq_data_get_irq_chip(&desc->irq_data);
946 if (chip && chip->irq_cpu_online &&
947 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
948 !irqd_irq_disabled(&desc->irq_data)))
949 chip->irq_cpu_online(&desc->irq_data);
951 raw_spin_unlock_irqrestore(&desc->lock, flags);
956 * irq_cpu_offline - Invoke all irq_cpu_offline functions.
958 * Iterate through all irqs and invoke the chip.irq_cpu_offline()
961 void irq_cpu_offline(void)
963 struct irq_desc *desc;
964 struct irq_chip *chip;
968 for_each_active_irq(irq) {
969 desc = irq_to_desc(irq);
973 raw_spin_lock_irqsave(&desc->lock, flags);
975 chip = irq_data_get_irq_chip(&desc->irq_data);
976 if (chip && chip->irq_cpu_offline &&
977 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
978 !irqd_irq_disabled(&desc->irq_data)))
979 chip->irq_cpu_offline(&desc->irq_data);
981 raw_spin_unlock_irqrestore(&desc->lock, flags);
985 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
987 * irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if
989 * @data: Pointer to interrupt specific data
991 void irq_chip_enable_parent(struct irq_data *data)
993 data = data->parent_data;
994 if (data->chip->irq_enable)
995 data->chip->irq_enable(data);
997 data->chip->irq_unmask(data);
1001 * irq_chip_disable_parent - Disable the parent interrupt (defaults to mask if
1003 * @data: Pointer to interrupt specific data
1005 void irq_chip_disable_parent(struct irq_data *data)
1007 data = data->parent_data;
1008 if (data->chip->irq_disable)
1009 data->chip->irq_disable(data);
1011 data->chip->irq_mask(data);
1015 * irq_chip_ack_parent - Acknowledge the parent interrupt
1016 * @data: Pointer to interrupt specific data
1018 void irq_chip_ack_parent(struct irq_data *data)
1020 data = data->parent_data;
1021 data->chip->irq_ack(data);
1023 EXPORT_SYMBOL_GPL(irq_chip_ack_parent);
1026 * irq_chip_mask_parent - Mask the parent interrupt
1027 * @data: Pointer to interrupt specific data
1029 void irq_chip_mask_parent(struct irq_data *data)
1031 data = data->parent_data;
1032 data->chip->irq_mask(data);
1034 EXPORT_SYMBOL_GPL(irq_chip_mask_parent);
1037 * irq_chip_unmask_parent - Unmask the parent interrupt
1038 * @data: Pointer to interrupt specific data
1040 void irq_chip_unmask_parent(struct irq_data *data)
1042 data = data->parent_data;
1043 data->chip->irq_unmask(data);
1045 EXPORT_SYMBOL_GPL(irq_chip_unmask_parent);
1048 * irq_chip_eoi_parent - Invoke EOI on the parent interrupt
1049 * @data: Pointer to interrupt specific data
1051 void irq_chip_eoi_parent(struct irq_data *data)
1053 data = data->parent_data;
1054 data->chip->irq_eoi(data);
1056 EXPORT_SYMBOL_GPL(irq_chip_eoi_parent);
1059 * irq_chip_set_affinity_parent - Set affinity on the parent interrupt
1060 * @data: Pointer to interrupt specific data
1061 * @dest: The affinity mask to set
1062 * @force: Flag to enforce setting (disable online checks)
1064 * Conditinal, as the underlying parent chip might not implement it.
1066 int irq_chip_set_affinity_parent(struct irq_data *data,
1067 const struct cpumask *dest, bool force)
1069 data = data->parent_data;
1070 if (data->chip->irq_set_affinity)
1071 return data->chip->irq_set_affinity(data, dest, force);
1077 * irq_chip_set_type_parent - Set IRQ type on the parent interrupt
1078 * @data: Pointer to interrupt specific data
1079 * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
1081 * Conditional, as the underlying parent chip might not implement it.
1083 int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
1085 data = data->parent_data;
1087 if (data->chip->irq_set_type)
1088 return data->chip->irq_set_type(data, type);
1092 EXPORT_SYMBOL_GPL(irq_chip_set_type_parent);
1095 * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
1096 * @data: Pointer to interrupt specific data
1098 * Iterate through the domain hierarchy of the interrupt and check
1099 * whether a hw retrigger function exists. If yes, invoke it.
1101 int irq_chip_retrigger_hierarchy(struct irq_data *data)
1103 for (data = data->parent_data; data; data = data->parent_data)
1104 if (data->chip && data->chip->irq_retrigger)
1105 return data->chip->irq_retrigger(data);
1111 * irq_chip_set_vcpu_affinity_parent - Set vcpu affinity on the parent interrupt
1112 * @data: Pointer to interrupt specific data
1113 * @vcpu_info: The vcpu affinity information
1115 int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info)
1117 data = data->parent_data;
1118 if (data->chip->irq_set_vcpu_affinity)
1119 return data->chip->irq_set_vcpu_affinity(data, vcpu_info);
1125 * irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
1126 * @data: Pointer to interrupt specific data
1127 * @on: Whether to set or reset the wake-up capability of this irq
1129 * Conditional, as the underlying parent chip might not implement it.
1131 int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
1133 data = data->parent_data;
1134 if (data->chip->irq_set_wake)
1135 return data->chip->irq_set_wake(data, on);
1142 * irq_chip_compose_msi_msg - Componse msi message for a irq chip
1143 * @data: Pointer to interrupt specific data
1144 * @msg: Pointer to the MSI message
1146 * For hierarchical domains we find the first chip in the hierarchy
1147 * which implements the irq_compose_msi_msg callback. For non
1148 * hierarchical we use the top level chip.
1150 int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
1152 struct irq_data *pos = NULL;
1154 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1155 for (; data; data = data->parent_data)
1157 if (data->chip && data->chip->irq_compose_msi_msg)
1162 pos->chip->irq_compose_msi_msg(pos, msg);
1168 * irq_chip_pm_get - Enable power for an IRQ chip
1169 * @data: Pointer to interrupt specific data
1171 * Enable the power to the IRQ chip referenced by the interrupt data
1174 int irq_chip_pm_get(struct irq_data *data)
1178 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
1179 retval = pm_runtime_get_sync(data->chip->parent_device);
1181 pm_runtime_put_noidle(data->chip->parent_device);
1190 * irq_chip_pm_put - Disable power for an IRQ chip
1191 * @data: Pointer to interrupt specific data
1193 * Disable the power to the IRQ chip referenced by the interrupt data
1194 * structure, belongs. Note that power will only be disabled, once this
1195 * function has been called for all IRQs that have called irq_chip_pm_get().
1197 int irq_chip_pm_put(struct irq_data *data)
1201 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
1202 retval = pm_runtime_put(data->chip->parent_device);
1204 return (retval < 0) ? retval : 0;