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 = action->thread_fn(action->irq, action->dev_id);
353 note_interrupt(desc, action_ret);
355 raw_spin_lock_irq(&desc->lock);
356 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
359 raw_spin_unlock_irq(&desc->lock);
361 EXPORT_SYMBOL_GPL(handle_nested_irq);
363 static bool irq_check_poll(struct irq_desc *desc)
365 if (!(desc->istate & IRQS_POLL_INPROGRESS))
367 return irq_wait_for_poll(desc);
370 static bool irq_may_run(struct irq_desc *desc)
372 unsigned int mask = IRQD_IRQ_INPROGRESS | IRQD_WAKEUP_ARMED;
375 * If the interrupt is not in progress and is not an armed
376 * wakeup interrupt, proceed.
378 if (!irqd_has_set(&desc->irq_data, mask))
382 * If the interrupt is an armed wakeup source, mark it pending
383 * and suspended, disable it and notify the pm core about the
386 if (irq_pm_check_wakeup(desc))
390 * Handle a potential concurrent poll on a different core.
392 return irq_check_poll(desc);
396 * handle_simple_irq - Simple and software-decoded IRQs.
397 * @desc: the interrupt description structure for this irq
399 * Simple interrupts are either sent from a demultiplexing interrupt
400 * handler or come from hardware, where no interrupt hardware control
403 * Note: The caller is expected to handle the ack, clear, mask and
404 * unmask issues if necessary.
406 void handle_simple_irq(struct irq_desc *desc)
408 raw_spin_lock(&desc->lock);
410 if (!irq_may_run(desc))
413 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
415 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
416 desc->istate |= IRQS_PENDING;
420 kstat_incr_irqs_this_cpu(desc);
421 handle_irq_event(desc);
424 raw_spin_unlock(&desc->lock);
426 EXPORT_SYMBOL_GPL(handle_simple_irq);
429 * handle_untracked_irq - Simple and software-decoded IRQs.
430 * @desc: the interrupt description structure for this irq
432 * Untracked interrupts are sent from a demultiplexing interrupt
433 * handler when the demultiplexer does not know which device it its
434 * multiplexed irq domain generated the interrupt. IRQ's handled
435 * through here are not subjected to stats tracking, randomness, or
436 * spurious interrupt detection.
438 * Note: Like handle_simple_irq, the caller is expected to handle
439 * the ack, clear, mask and unmask issues if necessary.
441 void handle_untracked_irq(struct irq_desc *desc)
443 unsigned int flags = 0;
445 raw_spin_lock(&desc->lock);
447 if (!irq_may_run(desc))
450 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
452 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
453 desc->istate |= IRQS_PENDING;
457 desc->istate &= ~IRQS_PENDING;
458 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
459 raw_spin_unlock(&desc->lock);
461 __handle_irq_event_percpu(desc, &flags);
463 raw_spin_lock(&desc->lock);
464 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
467 raw_spin_unlock(&desc->lock);
469 EXPORT_SYMBOL_GPL(handle_untracked_irq);
472 * Called unconditionally from handle_level_irq() and only for oneshot
473 * interrupts from handle_fasteoi_irq()
475 static void cond_unmask_irq(struct irq_desc *desc)
478 * We need to unmask in the following cases:
479 * - Standard level irq (IRQF_ONESHOT is not set)
480 * - Oneshot irq which did not wake the thread (caused by a
481 * spurious interrupt or a primary handler handling it
484 if (!irqd_irq_disabled(&desc->irq_data) &&
485 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)
490 * handle_level_irq - Level type irq handler
491 * @desc: the interrupt description structure for this irq
493 * Level type interrupts are active as long as the hardware line has
494 * the active level. This may require to mask the interrupt and unmask
495 * it after the associated handler has acknowledged the device, so the
496 * interrupt line is back to inactive.
498 void handle_level_irq(struct irq_desc *desc)
500 raw_spin_lock(&desc->lock);
503 if (!irq_may_run(desc))
506 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
509 * If its disabled or no action available
510 * keep it masked and get out of here
512 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
513 desc->istate |= IRQS_PENDING;
517 kstat_incr_irqs_this_cpu(desc);
518 handle_irq_event(desc);
520 cond_unmask_irq(desc);
523 raw_spin_unlock(&desc->lock);
525 EXPORT_SYMBOL_GPL(handle_level_irq);
527 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
528 static inline void preflow_handler(struct irq_desc *desc)
530 if (desc->preflow_handler)
531 desc->preflow_handler(&desc->irq_data);
534 static inline void preflow_handler(struct irq_desc *desc) { }
537 static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
539 if (!(desc->istate & IRQS_ONESHOT)) {
540 chip->irq_eoi(&desc->irq_data);
544 * We need to unmask in the following cases:
545 * - Oneshot irq which did not wake the thread (caused by a
546 * spurious interrupt or a primary handler handling it
549 if (!irqd_irq_disabled(&desc->irq_data) &&
550 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) {
551 chip->irq_eoi(&desc->irq_data);
553 } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) {
554 chip->irq_eoi(&desc->irq_data);
559 * handle_fasteoi_irq - irq handler for transparent controllers
560 * @desc: the interrupt description structure for this irq
562 * Only a single callback will be issued to the chip: an ->eoi()
563 * call when the interrupt has been serviced. This enables support
564 * for modern forms of interrupt handlers, which handle the flow
565 * details in hardware, transparently.
567 void handle_fasteoi_irq(struct irq_desc *desc)
569 struct irq_chip *chip = desc->irq_data.chip;
571 raw_spin_lock(&desc->lock);
573 if (!irq_may_run(desc))
576 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
579 * If its disabled or no action available
580 * then mask it and get out of here:
582 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
583 desc->istate |= IRQS_PENDING;
588 kstat_incr_irqs_this_cpu(desc);
589 if (desc->istate & IRQS_ONESHOT)
592 preflow_handler(desc);
593 handle_irq_event(desc);
595 cond_unmask_eoi_irq(desc, chip);
597 raw_spin_unlock(&desc->lock);
600 if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
601 chip->irq_eoi(&desc->irq_data);
602 raw_spin_unlock(&desc->lock);
604 EXPORT_SYMBOL_GPL(handle_fasteoi_irq);
607 * handle_edge_irq - edge type IRQ handler
608 * @desc: the interrupt description structure for this irq
610 * Interrupt occures on the falling and/or rising edge of a hardware
611 * signal. The occurrence is latched into the irq controller hardware
612 * and must be acked in order to be reenabled. After the ack another
613 * interrupt can happen on the same source even before the first one
614 * is handled by the associated event handler. If this happens it
615 * might be necessary to disable (mask) the interrupt depending on the
616 * controller hardware. This requires to reenable the interrupt inside
617 * of the loop which handles the interrupts which have arrived while
618 * the handler was running. If all pending interrupts are handled, the
621 void handle_edge_irq(struct irq_desc *desc)
623 raw_spin_lock(&desc->lock);
625 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
627 if (!irq_may_run(desc)) {
628 desc->istate |= IRQS_PENDING;
634 * If its disabled or no action available then mask it and get
637 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
638 desc->istate |= IRQS_PENDING;
643 kstat_incr_irqs_this_cpu(desc);
645 /* Start handling the irq */
646 desc->irq_data.chip->irq_ack(&desc->irq_data);
649 if (unlikely(!desc->action)) {
655 * When another irq arrived while we were handling
656 * one, we could have masked the irq.
657 * Renable it, if it was not disabled in meantime.
659 if (unlikely(desc->istate & IRQS_PENDING)) {
660 if (!irqd_irq_disabled(&desc->irq_data) &&
661 irqd_irq_masked(&desc->irq_data))
665 handle_irq_event(desc);
667 } while ((desc->istate & IRQS_PENDING) &&
668 !irqd_irq_disabled(&desc->irq_data));
671 raw_spin_unlock(&desc->lock);
673 EXPORT_SYMBOL(handle_edge_irq);
675 #ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
677 * handle_edge_eoi_irq - edge eoi type IRQ handler
678 * @desc: the interrupt description structure for this irq
680 * Similar as the above handle_edge_irq, but using eoi and w/o the
683 void handle_edge_eoi_irq(struct irq_desc *desc)
685 struct irq_chip *chip = irq_desc_get_chip(desc);
687 raw_spin_lock(&desc->lock);
689 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
691 if (!irq_may_run(desc)) {
692 desc->istate |= IRQS_PENDING;
697 * If its disabled or no action available then mask it and get
700 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
701 desc->istate |= IRQS_PENDING;
705 kstat_incr_irqs_this_cpu(desc);
708 if (unlikely(!desc->action))
711 handle_irq_event(desc);
713 } while ((desc->istate & IRQS_PENDING) &&
714 !irqd_irq_disabled(&desc->irq_data));
717 chip->irq_eoi(&desc->irq_data);
718 raw_spin_unlock(&desc->lock);
723 * handle_percpu_irq - Per CPU local irq handler
724 * @desc: the interrupt description structure for this irq
726 * Per CPU interrupts on SMP machines without locking requirements
728 void handle_percpu_irq(struct irq_desc *desc)
730 struct irq_chip *chip = irq_desc_get_chip(desc);
732 kstat_incr_irqs_this_cpu(desc);
735 chip->irq_ack(&desc->irq_data);
737 handle_irq_event_percpu(desc);
740 chip->irq_eoi(&desc->irq_data);
744 * handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
745 * @desc: the interrupt description structure for this irq
747 * Per CPU interrupts on SMP machines without locking requirements. Same as
748 * handle_percpu_irq() above but with the following extras:
750 * action->percpu_dev_id is a pointer to percpu variables which
751 * contain the real device id for the cpu on which this handler is
754 void handle_percpu_devid_irq(struct irq_desc *desc)
756 struct irq_chip *chip = irq_desc_get_chip(desc);
757 struct irqaction *action = desc->action;
758 unsigned int irq = irq_desc_get_irq(desc);
761 kstat_incr_irqs_this_cpu(desc);
764 chip->irq_ack(&desc->irq_data);
766 if (likely(action)) {
767 trace_irq_handler_entry(irq, action);
768 res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
769 trace_irq_handler_exit(irq, action, res);
771 unsigned int cpu = smp_processor_id();
772 bool enabled = cpumask_test_cpu(cpu, desc->percpu_enabled);
775 irq_percpu_disable(desc, cpu);
777 pr_err_once("Spurious%s percpu IRQ%u on CPU%u\n",
778 enabled ? " and unmasked" : "", irq, cpu);
782 chip->irq_eoi(&desc->irq_data);
786 __irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
787 int is_chained, const char *name)
790 handle = handle_bad_irq;
792 struct irq_data *irq_data = &desc->irq_data;
793 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
795 * With hierarchical domains we might run into a
796 * situation where the outermost chip is not yet set
797 * up, but the inner chips are there. Instead of
798 * bailing we install the handler, but obviously we
799 * cannot enable/startup the interrupt at this point.
802 if (irq_data->chip != &no_irq_chip)
805 * Bail out if the outer chip is not set up
806 * and the interrrupt supposed to be started
809 if (WARN_ON(is_chained))
812 irq_data = irq_data->parent_data;
815 if (WARN_ON(!irq_data || irq_data->chip == &no_irq_chip))
820 if (handle == handle_bad_irq) {
821 if (desc->irq_data.chip != &no_irq_chip)
823 irq_state_set_disabled(desc);
828 desc->handle_irq = handle;
831 if (handle != handle_bad_irq && is_chained) {
833 * We're about to start this interrupt immediately,
834 * hence the need to set the trigger configuration.
835 * But the .set_type callback may have overridden the
836 * flow handler, ignoring that we're dealing with a
837 * chained interrupt. Reset it immediately because we
840 __irq_set_trigger(desc, irqd_get_trigger_type(&desc->irq_data));
841 desc->handle_irq = handle;
843 irq_settings_set_noprobe(desc);
844 irq_settings_set_norequest(desc);
845 irq_settings_set_nothread(desc);
846 desc->action = &chained_action;
847 irq_startup(desc, true);
852 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
856 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
861 __irq_do_set_handler(desc, handle, is_chained, name);
862 irq_put_desc_busunlock(desc, flags);
864 EXPORT_SYMBOL_GPL(__irq_set_handler);
867 irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
871 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
876 __irq_do_set_handler(desc, handle, 1, NULL);
877 desc->irq_common_data.handler_data = data;
879 irq_put_desc_busunlock(desc, flags);
881 EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data);
884 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
885 irq_flow_handler_t handle, const char *name)
887 irq_set_chip(irq, chip);
888 __irq_set_handler(irq, handle, 0, name);
890 EXPORT_SYMBOL_GPL(irq_set_chip_and_handler_name);
892 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
895 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
899 irq_settings_clr_and_set(desc, clr, set);
901 irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
902 IRQD_TRIGGER_MASK | IRQD_LEVEL | IRQD_MOVE_PCNTXT);
903 if (irq_settings_has_no_balance_set(desc))
904 irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
905 if (irq_settings_is_per_cpu(desc))
906 irqd_set(&desc->irq_data, IRQD_PER_CPU);
907 if (irq_settings_can_move_pcntxt(desc))
908 irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT);
909 if (irq_settings_is_level(desc))
910 irqd_set(&desc->irq_data, IRQD_LEVEL);
912 irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc));
914 irq_put_desc_unlock(desc, flags);
916 EXPORT_SYMBOL_GPL(irq_modify_status);
919 * irq_cpu_online - Invoke all irq_cpu_online functions.
921 * Iterate through all irqs and invoke the chip.irq_cpu_online()
924 void irq_cpu_online(void)
926 struct irq_desc *desc;
927 struct irq_chip *chip;
931 for_each_active_irq(irq) {
932 desc = irq_to_desc(irq);
936 raw_spin_lock_irqsave(&desc->lock, flags);
938 chip = irq_data_get_irq_chip(&desc->irq_data);
939 if (chip && chip->irq_cpu_online &&
940 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
941 !irqd_irq_disabled(&desc->irq_data)))
942 chip->irq_cpu_online(&desc->irq_data);
944 raw_spin_unlock_irqrestore(&desc->lock, flags);
949 * irq_cpu_offline - Invoke all irq_cpu_offline functions.
951 * Iterate through all irqs and invoke the chip.irq_cpu_offline()
954 void irq_cpu_offline(void)
956 struct irq_desc *desc;
957 struct irq_chip *chip;
961 for_each_active_irq(irq) {
962 desc = irq_to_desc(irq);
966 raw_spin_lock_irqsave(&desc->lock, flags);
968 chip = irq_data_get_irq_chip(&desc->irq_data);
969 if (chip && chip->irq_cpu_offline &&
970 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
971 !irqd_irq_disabled(&desc->irq_data)))
972 chip->irq_cpu_offline(&desc->irq_data);
974 raw_spin_unlock_irqrestore(&desc->lock, flags);
978 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
980 * irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if
982 * @data: Pointer to interrupt specific data
984 void irq_chip_enable_parent(struct irq_data *data)
986 data = data->parent_data;
987 if (data->chip->irq_enable)
988 data->chip->irq_enable(data);
990 data->chip->irq_unmask(data);
994 * irq_chip_disable_parent - Disable the parent interrupt (defaults to mask if
996 * @data: Pointer to interrupt specific data
998 void irq_chip_disable_parent(struct irq_data *data)
1000 data = data->parent_data;
1001 if (data->chip->irq_disable)
1002 data->chip->irq_disable(data);
1004 data->chip->irq_mask(data);
1008 * irq_chip_ack_parent - Acknowledge the parent interrupt
1009 * @data: Pointer to interrupt specific data
1011 void irq_chip_ack_parent(struct irq_data *data)
1013 data = data->parent_data;
1014 data->chip->irq_ack(data);
1016 EXPORT_SYMBOL_GPL(irq_chip_ack_parent);
1019 * irq_chip_mask_parent - Mask the parent interrupt
1020 * @data: Pointer to interrupt specific data
1022 void irq_chip_mask_parent(struct irq_data *data)
1024 data = data->parent_data;
1025 data->chip->irq_mask(data);
1027 EXPORT_SYMBOL_GPL(irq_chip_mask_parent);
1030 * irq_chip_unmask_parent - Unmask the parent interrupt
1031 * @data: Pointer to interrupt specific data
1033 void irq_chip_unmask_parent(struct irq_data *data)
1035 data = data->parent_data;
1036 data->chip->irq_unmask(data);
1038 EXPORT_SYMBOL_GPL(irq_chip_unmask_parent);
1041 * irq_chip_eoi_parent - Invoke EOI on the parent interrupt
1042 * @data: Pointer to interrupt specific data
1044 void irq_chip_eoi_parent(struct irq_data *data)
1046 data = data->parent_data;
1047 data->chip->irq_eoi(data);
1049 EXPORT_SYMBOL_GPL(irq_chip_eoi_parent);
1052 * irq_chip_set_affinity_parent - Set affinity on the parent interrupt
1053 * @data: Pointer to interrupt specific data
1054 * @dest: The affinity mask to set
1055 * @force: Flag to enforce setting (disable online checks)
1057 * Conditinal, as the underlying parent chip might not implement it.
1059 int irq_chip_set_affinity_parent(struct irq_data *data,
1060 const struct cpumask *dest, bool force)
1062 data = data->parent_data;
1063 if (data->chip->irq_set_affinity)
1064 return data->chip->irq_set_affinity(data, dest, force);
1070 * irq_chip_set_type_parent - Set IRQ type on the parent interrupt
1071 * @data: Pointer to interrupt specific data
1072 * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
1074 * Conditional, as the underlying parent chip might not implement it.
1076 int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
1078 data = data->parent_data;
1080 if (data->chip->irq_set_type)
1081 return data->chip->irq_set_type(data, type);
1085 EXPORT_SYMBOL_GPL(irq_chip_set_type_parent);
1088 * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
1089 * @data: Pointer to interrupt specific data
1091 * Iterate through the domain hierarchy of the interrupt and check
1092 * whether a hw retrigger function exists. If yes, invoke it.
1094 int irq_chip_retrigger_hierarchy(struct irq_data *data)
1096 for (data = data->parent_data; data; data = data->parent_data)
1097 if (data->chip && data->chip->irq_retrigger)
1098 return data->chip->irq_retrigger(data);
1104 * irq_chip_set_vcpu_affinity_parent - Set vcpu affinity on the parent interrupt
1105 * @data: Pointer to interrupt specific data
1106 * @vcpu_info: The vcpu affinity information
1108 int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info)
1110 data = data->parent_data;
1111 if (data->chip->irq_set_vcpu_affinity)
1112 return data->chip->irq_set_vcpu_affinity(data, vcpu_info);
1118 * irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
1119 * @data: Pointer to interrupt specific data
1120 * @on: Whether to set or reset the wake-up capability of this irq
1122 * Conditional, as the underlying parent chip might not implement it.
1124 int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
1126 data = data->parent_data;
1127 if (data->chip->irq_set_wake)
1128 return data->chip->irq_set_wake(data, on);
1135 * irq_chip_compose_msi_msg - Componse msi message for a irq chip
1136 * @data: Pointer to interrupt specific data
1137 * @msg: Pointer to the MSI message
1139 * For hierarchical domains we find the first chip in the hierarchy
1140 * which implements the irq_compose_msi_msg callback. For non
1141 * hierarchical we use the top level chip.
1143 int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
1145 struct irq_data *pos = NULL;
1147 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1148 for (; data; data = data->parent_data)
1150 if (data->chip && data->chip->irq_compose_msi_msg)
1155 pos->chip->irq_compose_msi_msg(pos, msg);
1161 * irq_chip_pm_get - Enable power for an IRQ chip
1162 * @data: Pointer to interrupt specific data
1164 * Enable the power to the IRQ chip referenced by the interrupt data
1167 int irq_chip_pm_get(struct irq_data *data)
1171 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
1172 retval = pm_runtime_get_sync(data->chip->parent_device);
1174 pm_runtime_put_noidle(data->chip->parent_device);
1183 * irq_chip_pm_put - Disable power for an IRQ chip
1184 * @data: Pointer to interrupt specific data
1186 * Disable the power to the IRQ chip referenced by the interrupt data
1187 * structure, belongs. Note that power will only be disabled, once this
1188 * function has been called for all IRQs that have called irq_chip_pm_get().
1190 int irq_chip_pm_put(struct irq_data *data)
1194 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
1195 retval = pm_runtime_put(data->chip->parent_device);
1197 return (retval < 0) ? retval : 0;