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11#include <linux/irq.h>
12#include <linux/msi.h>
13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/kernel_stat.h>
16#include <linux/irqdomain.h>
17
18#include <trace/events/irq.h>
19
20#include "internals.h"
21
22static irqreturn_t bad_chained_irq(int irq, void *dev_id)
23{
24 WARN_ONCE(1, "Chained irq %d should not call an action\n", irq);
25 return IRQ_NONE;
26}
27
28
29
30
31
32struct irqaction chained_action = {
33 .handler = bad_chained_irq,
34};
35
36
37
38
39
40
41int irq_set_chip(unsigned int irq, struct irq_chip *chip)
42{
43 unsigned long flags;
44 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
45
46 if (!desc)
47 return -EINVAL;
48
49 if (!chip)
50 chip = &no_irq_chip;
51
52 desc->irq_data.chip = chip;
53 irq_put_desc_unlock(desc, flags);
54
55
56
57
58 irq_mark_irq(irq);
59 return 0;
60}
61EXPORT_SYMBOL(irq_set_chip);
62
63
64
65
66
67
68int irq_set_irq_type(unsigned int irq, unsigned int type)
69{
70 unsigned long flags;
71 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
72 int ret = 0;
73
74 if (!desc)
75 return -EINVAL;
76
77 ret = __irq_set_trigger(desc, type);
78 irq_put_desc_busunlock(desc, flags);
79 return ret;
80}
81EXPORT_SYMBOL(irq_set_irq_type);
82
83
84
85
86
87
88
89
90int irq_set_handler_data(unsigned int irq, void *data)
91{
92 unsigned long flags;
93 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
94
95 if (!desc)
96 return -EINVAL;
97 desc->irq_common_data.handler_data = data;
98 irq_put_desc_unlock(desc, flags);
99 return 0;
100}
101EXPORT_SYMBOL(irq_set_handler_data);
102
103
104
105
106
107
108
109
110
111int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
112 struct msi_desc *entry)
113{
114 unsigned long flags;
115 struct irq_desc *desc = irq_get_desc_lock(irq_base + irq_offset, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
116
117 if (!desc)
118 return -EINVAL;
119 desc->irq_common_data.msi_desc = entry;
120 if (entry && !irq_offset)
121 entry->irq = irq_base;
122 irq_put_desc_unlock(desc, flags);
123 return 0;
124}
125
126
127
128
129
130
131
132
133int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
134{
135 return irq_set_msi_desc_off(irq, 0, entry);
136}
137
138
139
140
141
142
143
144
145int irq_set_chip_data(unsigned int irq, void *data)
146{
147 unsigned long flags;
148 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
149
150 if (!desc)
151 return -EINVAL;
152 desc->irq_data.chip_data = data;
153 irq_put_desc_unlock(desc, flags);
154 return 0;
155}
156EXPORT_SYMBOL(irq_set_chip_data);
157
158struct irq_data *irq_get_irq_data(unsigned int irq)
159{
160 struct irq_desc *desc = irq_to_desc(irq);
161
162 return desc ? &desc->irq_data : NULL;
163}
164EXPORT_SYMBOL_GPL(irq_get_irq_data);
165
166static void irq_state_clr_disabled(struct irq_desc *desc)
167{
168 irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);
169}
170
171static void irq_state_clr_masked(struct irq_desc *desc)
172{
173 irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED);
174}
175
176static void irq_state_clr_started(struct irq_desc *desc)
177{
178 irqd_clear(&desc->irq_data, IRQD_IRQ_STARTED);
179}
180
181static void irq_state_set_started(struct irq_desc *desc)
182{
183 irqd_set(&desc->irq_data, IRQD_IRQ_STARTED);
184}
185
186enum {
187 IRQ_STARTUP_NORMAL,
188 IRQ_STARTUP_MANAGED,
189 IRQ_STARTUP_ABORT,
190};
191
192#ifdef CONFIG_SMP
193static int
194__irq_startup_managed(struct irq_desc *desc, struct cpumask *aff, bool force)
195{
196 struct irq_data *d = irq_desc_get_irq_data(desc);
197
198 if (!irqd_affinity_is_managed(d))
199 return IRQ_STARTUP_NORMAL;
200
201 irqd_clr_managed_shutdown(d);
202
203 if (cpumask_any_and(aff, cpu_online_mask) >= nr_cpu_ids) {
204
205
206
207
208
209
210 if (WARN_ON_ONCE(force))
211 return IRQ_STARTUP_ABORT;
212
213
214
215
216
217
218 return IRQ_STARTUP_ABORT;
219 }
220
221
222
223
224 if (WARN_ON(irq_domain_activate_irq(d, false)))
225 return IRQ_STARTUP_ABORT;
226 return IRQ_STARTUP_MANAGED;
227}
228#else
229static __always_inline int
230__irq_startup_managed(struct irq_desc *desc, struct cpumask *aff, bool force)
231{
232 return IRQ_STARTUP_NORMAL;
233}
234#endif
235
236static int __irq_startup(struct irq_desc *desc)
237{
238 struct irq_data *d = irq_desc_get_irq_data(desc);
239 int ret = 0;
240
241
242 WARN_ON_ONCE(!irqd_is_activated(d));
243
244 if (d->chip->irq_startup) {
245 ret = d->chip->irq_startup(d);
246 irq_state_clr_disabled(desc);
247 irq_state_clr_masked(desc);
248 } else {
249 irq_enable(desc);
250 }
251 irq_state_set_started(desc);
252 return ret;
253}
254
255int irq_startup(struct irq_desc *desc, bool resend, bool force)
256{
257 struct irq_data *d = irq_desc_get_irq_data(desc);
258 struct cpumask *aff = irq_data_get_affinity_mask(d);
259 int ret = 0;
260
261 desc->depth = 0;
262
263 if (irqd_is_started(d)) {
264 irq_enable(desc);
265 } else {
266 switch (__irq_startup_managed(desc, aff, force)) {
267 case IRQ_STARTUP_NORMAL:
268 ret = __irq_startup(desc);
269 irq_setup_affinity(desc);
270 break;
271 case IRQ_STARTUP_MANAGED:
272 irq_do_set_affinity(d, aff, false);
273 ret = __irq_startup(desc);
274 break;
275 case IRQ_STARTUP_ABORT:
276 irqd_set_managed_shutdown(d);
277 return 0;
278 }
279 }
280 if (resend)
281 check_irq_resend(desc);
282
283 return ret;
284}
285
286int irq_activate(struct irq_desc *desc)
287{
288 struct irq_data *d = irq_desc_get_irq_data(desc);
289
290 if (!irqd_affinity_is_managed(d))
291 return irq_domain_activate_irq(d, false);
292 return 0;
293}
294
295int irq_activate_and_startup(struct irq_desc *desc, bool resend)
296{
297 if (WARN_ON(irq_activate(desc)))
298 return 0;
299 return irq_startup(desc, resend, IRQ_START_FORCE);
300}
301
302static void __irq_disable(struct irq_desc *desc, bool mask);
303
304void irq_shutdown(struct irq_desc *desc)
305{
306 if (irqd_is_started(&desc->irq_data)) {
307 desc->depth = 1;
308 if (desc->irq_data.chip->irq_shutdown) {
309 desc->irq_data.chip->irq_shutdown(&desc->irq_data);
310 irq_state_set_disabled(desc);
311 irq_state_set_masked(desc);
312 } else {
313 __irq_disable(desc, true);
314 }
315 irq_state_clr_started(desc);
316 }
317}
318
319
320void irq_shutdown_and_deactivate(struct irq_desc *desc)
321{
322 irq_shutdown(desc);
323
324
325
326
327
328
329 irq_domain_deactivate_irq(&desc->irq_data);
330}
331
332void irq_enable(struct irq_desc *desc)
333{
334 if (!irqd_irq_disabled(&desc->irq_data)) {
335 unmask_irq(desc);
336 } else {
337 irq_state_clr_disabled(desc);
338 if (desc->irq_data.chip->irq_enable) {
339 desc->irq_data.chip->irq_enable(&desc->irq_data);
340 irq_state_clr_masked(desc);
341 } else {
342 unmask_irq(desc);
343 }
344 }
345}
346
347static void __irq_disable(struct irq_desc *desc, bool mask)
348{
349 if (irqd_irq_disabled(&desc->irq_data)) {
350 if (mask)
351 mask_irq(desc);
352 } else {
353 irq_state_set_disabled(desc);
354 if (desc->irq_data.chip->irq_disable) {
355 desc->irq_data.chip->irq_disable(&desc->irq_data);
356 irq_state_set_masked(desc);
357 } else if (mask) {
358 mask_irq(desc);
359 }
360 }
361}
362
363
364
365
366
367
368
369
370
371
372
373
374
375
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377
378
379
380
381
382
383void irq_disable(struct irq_desc *desc)
384{
385 __irq_disable(desc, irq_settings_disable_unlazy(desc));
386}
387
388void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
389{
390 if (desc->irq_data.chip->irq_enable)
391 desc->irq_data.chip->irq_enable(&desc->irq_data);
392 else
393 desc->irq_data.chip->irq_unmask(&desc->irq_data);
394 cpumask_set_cpu(cpu, desc->percpu_enabled);
395}
396
397void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
398{
399 if (desc->irq_data.chip->irq_disable)
400 desc->irq_data.chip->irq_disable(&desc->irq_data);
401 else
402 desc->irq_data.chip->irq_mask(&desc->irq_data);
403 cpumask_clear_cpu(cpu, desc->percpu_enabled);
404}
405
406static inline void mask_ack_irq(struct irq_desc *desc)
407{
408 if (desc->irq_data.chip->irq_mask_ack) {
409 desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
410 irq_state_set_masked(desc);
411 } else {
412 mask_irq(desc);
413 if (desc->irq_data.chip->irq_ack)
414 desc->irq_data.chip->irq_ack(&desc->irq_data);
415 }
416}
417
418void mask_irq(struct irq_desc *desc)
419{
420 if (irqd_irq_masked(&desc->irq_data))
421 return;
422
423 if (desc->irq_data.chip->irq_mask) {
424 desc->irq_data.chip->irq_mask(&desc->irq_data);
425 irq_state_set_masked(desc);
426 }
427}
428
429void unmask_irq(struct irq_desc *desc)
430{
431 if (!irqd_irq_masked(&desc->irq_data))
432 return;
433
434 if (desc->irq_data.chip->irq_unmask) {
435 desc->irq_data.chip->irq_unmask(&desc->irq_data);
436 irq_state_clr_masked(desc);
437 }
438}
439
440void unmask_threaded_irq(struct irq_desc *desc)
441{
442 struct irq_chip *chip = desc->irq_data.chip;
443
444 if (chip->flags & IRQCHIP_EOI_THREADED)
445 chip->irq_eoi(&desc->irq_data);
446
447 unmask_irq(desc);
448}
449
450
451
452
453
454
455
456
457
458void handle_nested_irq(unsigned int irq)
459{
460 struct irq_desc *desc = irq_to_desc(irq);
461 struct irqaction *action;
462 irqreturn_t action_ret;
463
464 might_sleep();
465
466 raw_spin_lock_irq(&desc->lock);
467
468 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
469
470 action = desc->action;
471 if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) {
472 desc->istate |= IRQS_PENDING;
473 goto out_unlock;
474 }
475
476 kstat_incr_irqs_this_cpu(desc);
477 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
478 raw_spin_unlock_irq(&desc->lock);
479
480 action_ret = IRQ_NONE;
481 for_each_action_of_desc(desc, action)
482 action_ret |= action->thread_fn(action->irq, action->dev_id);
483
484 if (!noirqdebug)
485 note_interrupt(desc, action_ret);
486
487 raw_spin_lock_irq(&desc->lock);
488 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
489
490out_unlock:
491 raw_spin_unlock_irq(&desc->lock);
492}
493EXPORT_SYMBOL_GPL(handle_nested_irq);
494
495static bool irq_check_poll(struct irq_desc *desc)
496{
497 if (!(desc->istate & IRQS_POLL_INPROGRESS))
498 return false;
499 return irq_wait_for_poll(desc);
500}
501
502static bool irq_may_run(struct irq_desc *desc)
503{
504 unsigned int mask = IRQD_IRQ_INPROGRESS | IRQD_WAKEUP_ARMED;
505
506
507
508
509
510 if (!irqd_has_set(&desc->irq_data, mask))
511 return true;
512
513
514
515
516
517
518 if (irq_pm_check_wakeup(desc))
519 return false;
520
521
522
523
524 return irq_check_poll(desc);
525}
526
527
528
529
530
531
532
533
534
535
536
537
538void handle_simple_irq(struct irq_desc *desc)
539{
540 raw_spin_lock(&desc->lock);
541
542 if (!irq_may_run(desc))
543 goto out_unlock;
544
545 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
546
547 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
548 desc->istate |= IRQS_PENDING;
549 goto out_unlock;
550 }
551
552 kstat_incr_irqs_this_cpu(desc);
553 handle_irq_event(desc);
554
555out_unlock:
556 raw_spin_unlock(&desc->lock);
557}
558EXPORT_SYMBOL_GPL(handle_simple_irq);
559
560
561
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564
565
566
567
568
569
570
571
572
573void handle_untracked_irq(struct irq_desc *desc)
574{
575 unsigned int flags = 0;
576
577 raw_spin_lock(&desc->lock);
578
579 if (!irq_may_run(desc))
580 goto out_unlock;
581
582 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
583
584 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
585 desc->istate |= IRQS_PENDING;
586 goto out_unlock;
587 }
588
589 desc->istate &= ~IRQS_PENDING;
590 irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
591 raw_spin_unlock(&desc->lock);
592
593 __handle_irq_event_percpu(desc, &flags);
594
595 raw_spin_lock(&desc->lock);
596 irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
597
598out_unlock:
599 raw_spin_unlock(&desc->lock);
600}
601EXPORT_SYMBOL_GPL(handle_untracked_irq);
602
603
604
605
606
607static void cond_unmask_irq(struct irq_desc *desc)
608{
609
610
611
612
613
614
615
616 if (!irqd_irq_disabled(&desc->irq_data) &&
617 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)
618 unmask_irq(desc);
619}
620
621
622
623
624
625
626
627
628
629
630void handle_level_irq(struct irq_desc *desc)
631{
632 raw_spin_lock(&desc->lock);
633 mask_ack_irq(desc);
634
635 if (!irq_may_run(desc))
636 goto out_unlock;
637
638 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
639
640
641
642
643
644 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
645 desc->istate |= IRQS_PENDING;
646 goto out_unlock;
647 }
648
649 kstat_incr_irqs_this_cpu(desc);
650 handle_irq_event(desc);
651
652 cond_unmask_irq(desc);
653
654out_unlock:
655 raw_spin_unlock(&desc->lock);
656}
657EXPORT_SYMBOL_GPL(handle_level_irq);
658
659#ifdef CONFIG_IRQ_PREFLOW_FASTEOI
660static inline void preflow_handler(struct irq_desc *desc)
661{
662 if (desc->preflow_handler)
663 desc->preflow_handler(&desc->irq_data);
664}
665#else
666static inline void preflow_handler(struct irq_desc *desc) { }
667#endif
668
669static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
670{
671 if (!(desc->istate & IRQS_ONESHOT)) {
672 chip->irq_eoi(&desc->irq_data);
673 return;
674 }
675
676
677
678
679
680
681 if (!irqd_irq_disabled(&desc->irq_data) &&
682 irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) {
683 chip->irq_eoi(&desc->irq_data);
684 unmask_irq(desc);
685 } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) {
686 chip->irq_eoi(&desc->irq_data);
687 }
688}
689
690
691
692
693
694
695
696
697
698
699void handle_fasteoi_irq(struct irq_desc *desc)
700{
701 struct irq_chip *chip = desc->irq_data.chip;
702
703 raw_spin_lock(&desc->lock);
704
705 if (!irq_may_run(desc))
706 goto out;
707
708 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
709
710
711
712
713
714 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
715 desc->istate |= IRQS_PENDING;
716 mask_irq(desc);
717 goto out;
718 }
719
720 kstat_incr_irqs_this_cpu(desc);
721 if (desc->istate & IRQS_ONESHOT)
722 mask_irq(desc);
723
724 preflow_handler(desc);
725 handle_irq_event(desc);
726
727 cond_unmask_eoi_irq(desc, chip);
728
729 raw_spin_unlock(&desc->lock);
730 return;
731out:
732 if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
733 chip->irq_eoi(&desc->irq_data);
734 raw_spin_unlock(&desc->lock);
735}
736EXPORT_SYMBOL_GPL(handle_fasteoi_irq);
737
738
739
740
741
742
743
744
745
746
747
748
749
750void handle_fasteoi_nmi(struct irq_desc *desc)
751{
752 struct irq_chip *chip = irq_desc_get_chip(desc);
753 struct irqaction *action = desc->action;
754 unsigned int irq = irq_desc_get_irq(desc);
755 irqreturn_t res;
756
757 __kstat_incr_irqs_this_cpu(desc);
758
759 trace_irq_handler_entry(irq, action);
760
761
762
763 res = action->handler(irq, action->dev_id);
764 trace_irq_handler_exit(irq, action, res);
765
766 if (chip->irq_eoi)
767 chip->irq_eoi(&desc->irq_data);
768}
769EXPORT_SYMBOL_GPL(handle_fasteoi_nmi);
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786void handle_edge_irq(struct irq_desc *desc)
787{
788 raw_spin_lock(&desc->lock);
789
790 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
791
792 if (!irq_may_run(desc)) {
793 desc->istate |= IRQS_PENDING;
794 mask_ack_irq(desc);
795 goto out_unlock;
796 }
797
798
799
800
801
802 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
803 desc->istate |= IRQS_PENDING;
804 mask_ack_irq(desc);
805 goto out_unlock;
806 }
807
808 kstat_incr_irqs_this_cpu(desc);
809
810
811 desc->irq_data.chip->irq_ack(&desc->irq_data);
812
813 do {
814 if (unlikely(!desc->action)) {
815 mask_irq(desc);
816 goto out_unlock;
817 }
818
819
820
821
822
823
824 if (unlikely(desc->istate & IRQS_PENDING)) {
825 if (!irqd_irq_disabled(&desc->irq_data) &&
826 irqd_irq_masked(&desc->irq_data))
827 unmask_irq(desc);
828 }
829
830 handle_irq_event(desc);
831
832 } while ((desc->istate & IRQS_PENDING) &&
833 !irqd_irq_disabled(&desc->irq_data));
834
835out_unlock:
836 raw_spin_unlock(&desc->lock);
837}
838EXPORT_SYMBOL(handle_edge_irq);
839
840#ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
841
842
843
844
845
846
847
848void handle_edge_eoi_irq(struct irq_desc *desc)
849{
850 struct irq_chip *chip = irq_desc_get_chip(desc);
851
852 raw_spin_lock(&desc->lock);
853
854 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
855
856 if (!irq_may_run(desc)) {
857 desc->istate |= IRQS_PENDING;
858 goto out_eoi;
859 }
860
861
862
863
864
865 if (irqd_irq_disabled(&desc->irq_data) || !desc->action) {
866 desc->istate |= IRQS_PENDING;
867 goto out_eoi;
868 }
869
870 kstat_incr_irqs_this_cpu(desc);
871
872 do {
873 if (unlikely(!desc->action))
874 goto out_eoi;
875
876 handle_irq_event(desc);
877
878 } while ((desc->istate & IRQS_PENDING) &&
879 !irqd_irq_disabled(&desc->irq_data));
880
881out_eoi:
882 chip->irq_eoi(&desc->irq_data);
883 raw_spin_unlock(&desc->lock);
884}
885#endif
886
887
888
889
890
891
892
893void handle_percpu_irq(struct irq_desc *desc)
894{
895 struct irq_chip *chip = irq_desc_get_chip(desc);
896
897
898
899
900
901 __kstat_incr_irqs_this_cpu(desc);
902
903 if (chip->irq_ack)
904 chip->irq_ack(&desc->irq_data);
905
906 handle_irq_event_percpu(desc);
907
908 if (chip->irq_eoi)
909 chip->irq_eoi(&desc->irq_data);
910}
911
912
913
914
915
916
917
918
919
920
921
922
923void handle_percpu_devid_irq(struct irq_desc *desc)
924{
925 struct irq_chip *chip = irq_desc_get_chip(desc);
926 struct irqaction *action = desc->action;
927 unsigned int irq = irq_desc_get_irq(desc);
928 irqreturn_t res;
929
930
931
932
933
934 __kstat_incr_irqs_this_cpu(desc);
935
936 if (chip->irq_ack)
937 chip->irq_ack(&desc->irq_data);
938
939 if (likely(action)) {
940 trace_irq_handler_entry(irq, action);
941 res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
942 trace_irq_handler_exit(irq, action, res);
943 } else {
944 unsigned int cpu = smp_processor_id();
945 bool enabled = cpumask_test_cpu(cpu, desc->percpu_enabled);
946
947 if (enabled)
948 irq_percpu_disable(desc, cpu);
949
950 pr_err_once("Spurious%s percpu IRQ%u on CPU%u\n",
951 enabled ? " and unmasked" : "", irq, cpu);
952 }
953
954 if (chip->irq_eoi)
955 chip->irq_eoi(&desc->irq_data);
956}
957
958
959
960
961
962
963
964
965
966void handle_percpu_devid_fasteoi_nmi(struct irq_desc *desc)
967{
968 struct irq_chip *chip = irq_desc_get_chip(desc);
969 struct irqaction *action = desc->action;
970 unsigned int irq = irq_desc_get_irq(desc);
971 irqreturn_t res;
972
973 __kstat_incr_irqs_this_cpu(desc);
974
975 trace_irq_handler_entry(irq, action);
976 res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
977 trace_irq_handler_exit(irq, action, res);
978
979 if (chip->irq_eoi)
980 chip->irq_eoi(&desc->irq_data);
981}
982
983static void
984__irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
985 int is_chained, const char *name)
986{
987 if (!handle) {
988 handle = handle_bad_irq;
989 } else {
990 struct irq_data *irq_data = &desc->irq_data;
991#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
992
993
994
995
996
997
998
999 while (irq_data) {
1000 if (irq_data->chip != &no_irq_chip)
1001 break;
1002
1003
1004
1005
1006
1007 if (WARN_ON(is_chained))
1008 return;
1009
1010 irq_data = irq_data->parent_data;
1011 }
1012#endif
1013 if (WARN_ON(!irq_data || irq_data->chip == &no_irq_chip))
1014 return;
1015 }
1016
1017
1018 if (handle == handle_bad_irq) {
1019 if (desc->irq_data.chip != &no_irq_chip)
1020 mask_ack_irq(desc);
1021 irq_state_set_disabled(desc);
1022 if (is_chained)
1023 desc->action = NULL;
1024 desc->depth = 1;
1025 }
1026 desc->handle_irq = handle;
1027 desc->name = name;
1028
1029 if (handle != handle_bad_irq && is_chained) {
1030 unsigned int type = irqd_get_trigger_type(&desc->irq_data);
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040 if (type != IRQ_TYPE_NONE) {
1041 __irq_set_trigger(desc, type);
1042 desc->handle_irq = handle;
1043 }
1044
1045 irq_settings_set_noprobe(desc);
1046 irq_settings_set_norequest(desc);
1047 irq_settings_set_nothread(desc);
1048 desc->action = &chained_action;
1049 irq_activate_and_startup(desc, IRQ_RESEND);
1050 }
1051}
1052
1053void
1054__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
1055 const char *name)
1056{
1057 unsigned long flags;
1058 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
1059
1060 if (!desc)
1061 return;
1062
1063 __irq_do_set_handler(desc, handle, is_chained, name);
1064 irq_put_desc_busunlock(desc, flags);
1065}
1066EXPORT_SYMBOL_GPL(__irq_set_handler);
1067
1068void
1069irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
1070 void *data)
1071{
1072 unsigned long flags;
1073 struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
1074
1075 if (!desc)
1076 return;
1077
1078 desc->irq_common_data.handler_data = data;
1079 __irq_do_set_handler(desc, handle, 1, NULL);
1080
1081 irq_put_desc_busunlock(desc, flags);
1082}
1083EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data);
1084
1085void
1086irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
1087 irq_flow_handler_t handle, const char *name)
1088{
1089 irq_set_chip(irq, chip);
1090 __irq_set_handler(irq, handle, 0, name);
1091}
1092EXPORT_SYMBOL_GPL(irq_set_chip_and_handler_name);
1093
1094void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
1095{
1096 unsigned long flags, trigger, tmp;
1097 struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
1098
1099 if (!desc)
1100 return;
1101
1102
1103
1104
1105
1106 WARN_ON_ONCE(!desc->depth && (set & _IRQ_NOAUTOEN));
1107
1108 irq_settings_clr_and_set(desc, clr, set);
1109
1110 trigger = irqd_get_trigger_type(&desc->irq_data);
1111
1112 irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
1113 IRQD_TRIGGER_MASK | IRQD_LEVEL | IRQD_MOVE_PCNTXT);
1114 if (irq_settings_has_no_balance_set(desc))
1115 irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
1116 if (irq_settings_is_per_cpu(desc))
1117 irqd_set(&desc->irq_data, IRQD_PER_CPU);
1118 if (irq_settings_can_move_pcntxt(desc))
1119 irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT);
1120 if (irq_settings_is_level(desc))
1121 irqd_set(&desc->irq_data, IRQD_LEVEL);
1122
1123 tmp = irq_settings_get_trigger_mask(desc);
1124 if (tmp != IRQ_TYPE_NONE)
1125 trigger = tmp;
1126
1127 irqd_set(&desc->irq_data, trigger);
1128
1129 irq_put_desc_unlock(desc, flags);
1130}
1131EXPORT_SYMBOL_GPL(irq_modify_status);
1132
1133
1134
1135
1136
1137
1138
1139void irq_cpu_online(void)
1140{
1141 struct irq_desc *desc;
1142 struct irq_chip *chip;
1143 unsigned long flags;
1144 unsigned int irq;
1145
1146 for_each_active_irq(irq) {
1147 desc = irq_to_desc(irq);
1148 if (!desc)
1149 continue;
1150
1151 raw_spin_lock_irqsave(&desc->lock, flags);
1152
1153 chip = irq_data_get_irq_chip(&desc->irq_data);
1154 if (chip && chip->irq_cpu_online &&
1155 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
1156 !irqd_irq_disabled(&desc->irq_data)))
1157 chip->irq_cpu_online(&desc->irq_data);
1158
1159 raw_spin_unlock_irqrestore(&desc->lock, flags);
1160 }
1161}
1162
1163
1164
1165
1166
1167
1168
1169void irq_cpu_offline(void)
1170{
1171 struct irq_desc *desc;
1172 struct irq_chip *chip;
1173 unsigned long flags;
1174 unsigned int irq;
1175
1176 for_each_active_irq(irq) {
1177 desc = irq_to_desc(irq);
1178 if (!desc)
1179 continue;
1180
1181 raw_spin_lock_irqsave(&desc->lock, flags);
1182
1183 chip = irq_data_get_irq_chip(&desc->irq_data);
1184 if (chip && chip->irq_cpu_offline &&
1185 (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
1186 !irqd_irq_disabled(&desc->irq_data)))
1187 chip->irq_cpu_offline(&desc->irq_data);
1188
1189 raw_spin_unlock_irqrestore(&desc->lock, flags);
1190 }
1191}
1192
1193#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1194
1195#ifdef CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206void handle_fasteoi_ack_irq(struct irq_desc *desc)
1207{
1208 struct irq_chip *chip = desc->irq_data.chip;
1209
1210 raw_spin_lock(&desc->lock);
1211
1212 if (!irq_may_run(desc))
1213 goto out;
1214
1215 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
1216
1217
1218
1219
1220
1221 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
1222 desc->istate |= IRQS_PENDING;
1223 mask_irq(desc);
1224 goto out;
1225 }
1226
1227 kstat_incr_irqs_this_cpu(desc);
1228 if (desc->istate & IRQS_ONESHOT)
1229 mask_irq(desc);
1230
1231
1232 desc->irq_data.chip->irq_ack(&desc->irq_data);
1233
1234 preflow_handler(desc);
1235 handle_irq_event(desc);
1236
1237 cond_unmask_eoi_irq(desc, chip);
1238
1239 raw_spin_unlock(&desc->lock);
1240 return;
1241out:
1242 if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
1243 chip->irq_eoi(&desc->irq_data);
1244 raw_spin_unlock(&desc->lock);
1245}
1246EXPORT_SYMBOL_GPL(handle_fasteoi_ack_irq);
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258void handle_fasteoi_mask_irq(struct irq_desc *desc)
1259{
1260 struct irq_chip *chip = desc->irq_data.chip;
1261
1262 raw_spin_lock(&desc->lock);
1263 mask_ack_irq(desc);
1264
1265 if (!irq_may_run(desc))
1266 goto out;
1267
1268 desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
1269
1270
1271
1272
1273
1274 if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
1275 desc->istate |= IRQS_PENDING;
1276 mask_irq(desc);
1277 goto out;
1278 }
1279
1280 kstat_incr_irqs_this_cpu(desc);
1281 if (desc->istate & IRQS_ONESHOT)
1282 mask_irq(desc);
1283
1284 preflow_handler(desc);
1285 handle_irq_event(desc);
1286
1287 cond_unmask_eoi_irq(desc, chip);
1288
1289 raw_spin_unlock(&desc->lock);
1290 return;
1291out:
1292 if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
1293 chip->irq_eoi(&desc->irq_data);
1294 raw_spin_unlock(&desc->lock);
1295}
1296EXPORT_SYMBOL_GPL(handle_fasteoi_mask_irq);
1297
1298#endif
1299
1300
1301
1302
1303
1304
1305void irq_chip_enable_parent(struct irq_data *data)
1306{
1307 data = data->parent_data;
1308 if (data->chip->irq_enable)
1309 data->chip->irq_enable(data);
1310 else
1311 data->chip->irq_unmask(data);
1312}
1313EXPORT_SYMBOL_GPL(irq_chip_enable_parent);
1314
1315
1316
1317
1318
1319
1320void irq_chip_disable_parent(struct irq_data *data)
1321{
1322 data = data->parent_data;
1323 if (data->chip->irq_disable)
1324 data->chip->irq_disable(data);
1325 else
1326 data->chip->irq_mask(data);
1327}
1328EXPORT_SYMBOL_GPL(irq_chip_disable_parent);
1329
1330
1331
1332
1333
1334void irq_chip_ack_parent(struct irq_data *data)
1335{
1336 data = data->parent_data;
1337 data->chip->irq_ack(data);
1338}
1339EXPORT_SYMBOL_GPL(irq_chip_ack_parent);
1340
1341
1342
1343
1344
1345void irq_chip_mask_parent(struct irq_data *data)
1346{
1347 data = data->parent_data;
1348 data->chip->irq_mask(data);
1349}
1350EXPORT_SYMBOL_GPL(irq_chip_mask_parent);
1351
1352
1353
1354
1355
1356void irq_chip_mask_ack_parent(struct irq_data *data)
1357{
1358 data = data->parent_data;
1359 data->chip->irq_mask_ack(data);
1360}
1361EXPORT_SYMBOL_GPL(irq_chip_mask_ack_parent);
1362
1363
1364
1365
1366
1367void irq_chip_unmask_parent(struct irq_data *data)
1368{
1369 data = data->parent_data;
1370 data->chip->irq_unmask(data);
1371}
1372EXPORT_SYMBOL_GPL(irq_chip_unmask_parent);
1373
1374
1375
1376
1377
1378void irq_chip_eoi_parent(struct irq_data *data)
1379{
1380 data = data->parent_data;
1381 data->chip->irq_eoi(data);
1382}
1383EXPORT_SYMBOL_GPL(irq_chip_eoi_parent);
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393int irq_chip_set_affinity_parent(struct irq_data *data,
1394 const struct cpumask *dest, bool force)
1395{
1396 data = data->parent_data;
1397 if (data->chip->irq_set_affinity)
1398 return data->chip->irq_set_affinity(data, dest, force);
1399
1400 return -ENOSYS;
1401}
1402EXPORT_SYMBOL_GPL(irq_chip_set_affinity_parent);
1403
1404
1405
1406
1407
1408
1409
1410
1411int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
1412{
1413 data = data->parent_data;
1414
1415 if (data->chip->irq_set_type)
1416 return data->chip->irq_set_type(data, type);
1417
1418 return -ENOSYS;
1419}
1420EXPORT_SYMBOL_GPL(irq_chip_set_type_parent);
1421
1422
1423
1424
1425
1426
1427
1428
1429int irq_chip_retrigger_hierarchy(struct irq_data *data)
1430{
1431 for (data = data->parent_data; data; data = data->parent_data)
1432 if (data->chip && data->chip->irq_retrigger)
1433 return data->chip->irq_retrigger(data);
1434
1435 return 0;
1436}
1437
1438
1439
1440
1441
1442
1443int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info)
1444{
1445 data = data->parent_data;
1446 if (data->chip->irq_set_vcpu_affinity)
1447 return data->chip->irq_set_vcpu_affinity(data, vcpu_info);
1448
1449 return -ENOSYS;
1450}
1451
1452
1453
1454
1455
1456
1457
1458
1459int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
1460{
1461 data = data->parent_data;
1462
1463 if (data->chip->flags & IRQCHIP_SKIP_SET_WAKE)
1464 return 0;
1465
1466 if (data->chip->irq_set_wake)
1467 return data->chip->irq_set_wake(data, on);
1468
1469 return -ENOSYS;
1470}
1471EXPORT_SYMBOL_GPL(irq_chip_set_wake_parent);
1472
1473
1474
1475
1476
1477int irq_chip_request_resources_parent(struct irq_data *data)
1478{
1479 data = data->parent_data;
1480
1481 if (data->chip->irq_request_resources)
1482 return data->chip->irq_request_resources(data);
1483
1484 return -ENOSYS;
1485}
1486EXPORT_SYMBOL_GPL(irq_chip_request_resources_parent);
1487
1488
1489
1490
1491
1492void irq_chip_release_resources_parent(struct irq_data *data)
1493{
1494 data = data->parent_data;
1495 if (data->chip->irq_release_resources)
1496 data->chip->irq_release_resources(data);
1497}
1498EXPORT_SYMBOL_GPL(irq_chip_release_resources_parent);
1499#endif
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
1511{
1512 struct irq_data *pos = NULL;
1513
1514#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1515 for (; data; data = data->parent_data)
1516#endif
1517 if (data->chip && data->chip->irq_compose_msi_msg)
1518 pos = data;
1519 if (!pos)
1520 return -ENOSYS;
1521
1522 pos->chip->irq_compose_msi_msg(pos, msg);
1523
1524 return 0;
1525}
1526
1527
1528
1529
1530
1531
1532
1533
1534int irq_chip_pm_get(struct irq_data *data)
1535{
1536 int retval;
1537
1538 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
1539 retval = pm_runtime_get_sync(data->chip->parent_device);
1540 if (retval < 0) {
1541 pm_runtime_put_noidle(data->chip->parent_device);
1542 return retval;
1543 }
1544 }
1545
1546 return 0;
1547}
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557int irq_chip_pm_put(struct irq_data *data)
1558{
1559 int retval = 0;
1560
1561 if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
1562 retval = pm_runtime_put(data->chip->parent_device);
1563
1564 return (retval < 0) ? retval : 0;
1565}
1566