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3#ifndef _LINUX_INTERRUPT_H
4#define _LINUX_INTERRUPT_H
5
6#include <linux/kernel.h>
7#include <linux/bitops.h>
8#include <linux/cpumask.h>
9#include <linux/irqreturn.h>
10#include <linux/irqnr.h>
11#include <linux/hardirq.h>
12#include <linux/irqflags.h>
13#include <linux/hrtimer.h>
14#include <linux/kref.h>
15#include <linux/workqueue.h>
16
17#include <linux/atomic.h>
18#include <asm/ptrace.h>
19#include <asm/irq.h>
20#include <asm/sections.h>
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28
29#define IRQF_TRIGGER_NONE 0x00000000
30#define IRQF_TRIGGER_RISING 0x00000001
31#define IRQF_TRIGGER_FALLING 0x00000002
32#define IRQF_TRIGGER_HIGH 0x00000004
33#define IRQF_TRIGGER_LOW 0x00000008
34#define IRQF_TRIGGER_MASK (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \
35 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
36#define IRQF_TRIGGER_PROBE 0x00000010
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65#define IRQF_SHARED 0x00000080
66#define IRQF_PROBE_SHARED 0x00000100
67#define __IRQF_TIMER 0x00000200
68#define IRQF_PERCPU 0x00000400
69#define IRQF_NOBALANCING 0x00000800
70#define IRQF_IRQPOLL 0x00001000
71#define IRQF_ONESHOT 0x00002000
72#define IRQF_NO_SUSPEND 0x00004000
73#define IRQF_FORCE_RESUME 0x00008000
74#define IRQF_NO_THREAD 0x00010000
75#define IRQF_EARLY_RESUME 0x00020000
76#define IRQF_COND_SUSPEND 0x00040000
77
78#define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD)
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87enum {
88 IRQC_IS_HARDIRQ = 0,
89 IRQC_IS_NESTED,
90};
91
92typedef irqreturn_t (*irq_handler_t)(int, void *);
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110struct irqaction {
111 irq_handler_t handler;
112 void *dev_id;
113 void __percpu *percpu_dev_id;
114 struct irqaction *next;
115 irq_handler_t thread_fn;
116 struct task_struct *thread;
117 struct irqaction *secondary;
118 unsigned int irq;
119 unsigned int flags;
120 unsigned long thread_flags;
121 unsigned long thread_mask;
122 const char *name;
123 struct proc_dir_entry *dir;
124} ____cacheline_internodealigned_in_smp;
125
126extern irqreturn_t no_action(int cpl, void *dev_id);
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135
136#define IRQ_NOTCONNECTED (1U << 31)
137
138extern int __must_check
139request_threaded_irq(unsigned int irq, irq_handler_t handler,
140 irq_handler_t thread_fn,
141 unsigned long flags, const char *name, void *dev);
142
143static inline int __must_check
144request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
145 const char *name, void *dev)
146{
147 return request_threaded_irq(irq, handler, NULL, flags, name, dev);
148}
149
150extern int __must_check
151request_any_context_irq(unsigned int irq, irq_handler_t handler,
152 unsigned long flags, const char *name, void *dev_id);
153
154extern int __must_check
155__request_percpu_irq(unsigned int irq, irq_handler_t handler,
156 unsigned long flags, const char *devname,
157 void __percpu *percpu_dev_id);
158
159extern int __must_check
160request_nmi(unsigned int irq, irq_handler_t handler, unsigned long flags,
161 const char *name, void *dev);
162
163static inline int __must_check
164request_percpu_irq(unsigned int irq, irq_handler_t handler,
165 const char *devname, void __percpu *percpu_dev_id)
166{
167 return __request_percpu_irq(irq, handler, 0,
168 devname, percpu_dev_id);
169}
170
171extern int __must_check
172request_percpu_nmi(unsigned int irq, irq_handler_t handler,
173 const char *devname, void __percpu *dev);
174
175extern const void *free_irq(unsigned int, void *);
176extern void free_percpu_irq(unsigned int, void __percpu *);
177
178extern const void *free_nmi(unsigned int irq, void *dev_id);
179extern void free_percpu_nmi(unsigned int irq, void __percpu *percpu_dev_id);
180
181struct device;
182
183extern int __must_check
184devm_request_threaded_irq(struct device *dev, unsigned int irq,
185 irq_handler_t handler, irq_handler_t thread_fn,
186 unsigned long irqflags, const char *devname,
187 void *dev_id);
188
189static inline int __must_check
190devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler,
191 unsigned long irqflags, const char *devname, void *dev_id)
192{
193 return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,
194 devname, dev_id);
195}
196
197extern int __must_check
198devm_request_any_context_irq(struct device *dev, unsigned int irq,
199 irq_handler_t handler, unsigned long irqflags,
200 const char *devname, void *dev_id);
201
202extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
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216#ifdef CONFIG_LOCKDEP
217# define local_irq_enable_in_hardirq() do { } while (0)
218#else
219# define local_irq_enable_in_hardirq() local_irq_enable()
220#endif
221
222extern void disable_irq_nosync(unsigned int irq);
223extern bool disable_hardirq(unsigned int irq);
224extern void disable_irq(unsigned int irq);
225extern void disable_percpu_irq(unsigned int irq);
226extern void enable_irq(unsigned int irq);
227extern void enable_percpu_irq(unsigned int irq, unsigned int type);
228extern bool irq_percpu_is_enabled(unsigned int irq);
229extern void irq_wake_thread(unsigned int irq, void *dev_id);
230
231extern void disable_nmi_nosync(unsigned int irq);
232extern void disable_percpu_nmi(unsigned int irq);
233extern void enable_nmi(unsigned int irq);
234extern void enable_percpu_nmi(unsigned int irq, unsigned int type);
235extern int prepare_percpu_nmi(unsigned int irq);
236extern void teardown_percpu_nmi(unsigned int irq);
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239extern void suspend_device_irqs(void);
240extern void resume_device_irqs(void);
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254struct irq_affinity_notify {
255 unsigned int irq;
256 struct kref kref;
257 struct work_struct work;
258 void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask);
259 void (*release)(struct kref *ref);
260};
261
262#define IRQ_AFFINITY_MAX_SETS 4
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278struct irq_affinity {
279 unsigned int pre_vectors;
280 unsigned int post_vectors;
281 unsigned int nr_sets;
282 unsigned int set_size[IRQ_AFFINITY_MAX_SETS];
283 void (*calc_sets)(struct irq_affinity *, unsigned int nvecs);
284 void *priv;
285};
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291
292struct irq_affinity_desc {
293 struct cpumask mask;
294 unsigned int is_managed : 1;
295};
296
297#if defined(CONFIG_SMP)
298
299extern cpumask_var_t irq_default_affinity;
300
301
302extern int __irq_set_affinity(unsigned int irq, const struct cpumask *cpumask,
303 bool force);
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311
312static inline int
313irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
314{
315 return __irq_set_affinity(irq, cpumask, false);
316}
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329static inline int
330irq_force_affinity(unsigned int irq, const struct cpumask *cpumask)
331{
332 return __irq_set_affinity(irq, cpumask, true);
333}
334
335extern int irq_can_set_affinity(unsigned int irq);
336extern int irq_select_affinity(unsigned int irq);
337
338extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);
339
340extern int
341irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
342
343struct irq_affinity_desc *
344irq_create_affinity_masks(unsigned int nvec, struct irq_affinity *affd);
345
346unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
347 const struct irq_affinity *affd);
348
349#else
350
351static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)
352{
353 return -EINVAL;
354}
355
356static inline int irq_force_affinity(unsigned int irq, const struct cpumask *cpumask)
357{
358 return 0;
359}
360
361static inline int irq_can_set_affinity(unsigned int irq)
362{
363 return 0;
364}
365
366static inline int irq_select_affinity(unsigned int irq) { return 0; }
367
368static inline int irq_set_affinity_hint(unsigned int irq,
369 const struct cpumask *m)
370{
371 return -EINVAL;
372}
373
374static inline int
375irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)
376{
377 return 0;
378}
379
380static inline struct irq_affinity_desc *
381irq_create_affinity_masks(unsigned int nvec, struct irq_affinity *affd)
382{
383 return NULL;
384}
385
386static inline unsigned int
387irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
388 const struct irq_affinity *affd)
389{
390 return maxvec;
391}
392
393#endif
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406static inline void disable_irq_nosync_lockdep(unsigned int irq)
407{
408 disable_irq_nosync(irq);
409#ifdef CONFIG_LOCKDEP
410 local_irq_disable();
411#endif
412}
413
414static inline void disable_irq_nosync_lockdep_irqsave(unsigned int irq, unsigned long *flags)
415{
416 disable_irq_nosync(irq);
417#ifdef CONFIG_LOCKDEP
418 local_irq_save(*flags);
419#endif
420}
421
422static inline void disable_irq_lockdep(unsigned int irq)
423{
424 disable_irq(irq);
425#ifdef CONFIG_LOCKDEP
426 local_irq_disable();
427#endif
428}
429
430static inline void enable_irq_lockdep(unsigned int irq)
431{
432#ifdef CONFIG_LOCKDEP
433 local_irq_enable();
434#endif
435 enable_irq(irq);
436}
437
438static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long *flags)
439{
440#ifdef CONFIG_LOCKDEP
441 local_irq_restore(*flags);
442#endif
443 enable_irq(irq);
444}
445
446
447extern int irq_set_irq_wake(unsigned int irq, unsigned int on);
448
449static inline int enable_irq_wake(unsigned int irq)
450{
451 return irq_set_irq_wake(irq, 1);
452}
453
454static inline int disable_irq_wake(unsigned int irq)
455{
456 return irq_set_irq_wake(irq, 0);
457}
458
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461
462enum irqchip_irq_state {
463 IRQCHIP_STATE_PENDING,
464 IRQCHIP_STATE_ACTIVE,
465 IRQCHIP_STATE_MASKED,
466 IRQCHIP_STATE_LINE_LEVEL,
467};
468
469extern int irq_get_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
470 bool *state);
471extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
472 bool state);
473
474#ifdef CONFIG_IRQ_FORCED_THREADING
475extern bool force_irqthreads;
476#else
477#define force_irqthreads (0)
478#endif
479
480#ifndef local_softirq_pending
481
482#ifndef local_softirq_pending_ref
483#define local_softirq_pending_ref irq_stat.__softirq_pending
484#endif
485
486#define local_softirq_pending() (__this_cpu_read(local_softirq_pending_ref))
487#define set_softirq_pending(x) (__this_cpu_write(local_softirq_pending_ref, (x)))
488#define or_softirq_pending(x) (__this_cpu_or(local_softirq_pending_ref, (x)))
489
490#endif
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498#ifndef hard_irq_disable
499#define hard_irq_disable() do { } while(0)
500#endif
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508enum
509{
510 HI_SOFTIRQ=0,
511 TIMER_SOFTIRQ,
512 NET_TX_SOFTIRQ,
513 NET_RX_SOFTIRQ,
514 BLOCK_SOFTIRQ,
515 IRQ_POLL_SOFTIRQ,
516 TASKLET_SOFTIRQ,
517 SCHED_SOFTIRQ,
518 HRTIMER_SOFTIRQ,
519
520 RCU_SOFTIRQ,
521
522 NR_SOFTIRQS
523};
524
525#define SOFTIRQ_STOP_IDLE_MASK (~(1 << RCU_SOFTIRQ))
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530extern const char * const softirq_to_name[NR_SOFTIRQS];
531
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536struct softirq_action
537{
538 void (*action)(struct softirq_action *);
539};
540
541asmlinkage void do_softirq(void);
542asmlinkage void __do_softirq(void);
543
544#ifdef __ARCH_HAS_DO_SOFTIRQ
545void do_softirq_own_stack(void);
546#else
547static inline void do_softirq_own_stack(void)
548{
549 __do_softirq();
550}
551#endif
552
553extern void open_softirq(int nr, void (*action)(struct softirq_action *));
554extern void softirq_init(void);
555extern void __raise_softirq_irqoff(unsigned int nr);
556
557extern void raise_softirq_irqoff(unsigned int nr);
558extern void raise_softirq(unsigned int nr);
559
560DECLARE_PER_CPU(struct task_struct *, ksoftirqd);
561
562static inline struct task_struct *this_cpu_ksoftirqd(void)
563{
564 return this_cpu_read(ksoftirqd);
565}
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587struct tasklet_struct
588{
589 struct tasklet_struct *next;
590 unsigned long state;
591 atomic_t count;
592 void (*func)(unsigned long);
593 unsigned long data;
594};
595
596#define DECLARE_TASKLET(name, func, data) \
597struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(0), func, data }
598
599#define DECLARE_TASKLET_DISABLED(name, func, data) \
600struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(1), func, data }
601
602
603enum
604{
605 TASKLET_STATE_SCHED,
606 TASKLET_STATE_RUN
607};
608
609#ifdef CONFIG_SMP
610static inline int tasklet_trylock(struct tasklet_struct *t)
611{
612 return !test_and_set_bit(TASKLET_STATE_RUN, &(t)->state);
613}
614
615static inline void tasklet_unlock(struct tasklet_struct *t)
616{
617 smp_mb__before_atomic();
618 clear_bit(TASKLET_STATE_RUN, &(t)->state);
619}
620
621static inline void tasklet_unlock_wait(struct tasklet_struct *t)
622{
623 while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); }
624}
625#else
626#define tasklet_trylock(t) 1
627#define tasklet_unlock_wait(t) do { } while (0)
628#define tasklet_unlock(t) do { } while (0)
629#endif
630
631extern void __tasklet_schedule(struct tasklet_struct *t);
632
633static inline void tasklet_schedule(struct tasklet_struct *t)
634{
635 if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state))
636 __tasklet_schedule(t);
637}
638
639extern void __tasklet_hi_schedule(struct tasklet_struct *t);
640
641static inline void tasklet_hi_schedule(struct tasklet_struct *t)
642{
643 if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state))
644 __tasklet_hi_schedule(t);
645}
646
647static inline void tasklet_disable_nosync(struct tasklet_struct *t)
648{
649 atomic_inc(&t->count);
650 smp_mb__after_atomic();
651}
652
653static inline void tasklet_disable(struct tasklet_struct *t)
654{
655 tasklet_disable_nosync(t);
656 tasklet_unlock_wait(t);
657 smp_mb();
658}
659
660static inline void tasklet_enable(struct tasklet_struct *t)
661{
662 smp_mb__before_atomic();
663 atomic_dec(&t->count);
664}
665
666extern void tasklet_kill(struct tasklet_struct *t);
667extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu);
668extern void tasklet_init(struct tasklet_struct *t,
669 void (*func)(unsigned long), unsigned long data);
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699#if !defined(CONFIG_GENERIC_IRQ_PROBE)
700static inline unsigned long probe_irq_on(void)
701{
702 return 0;
703}
704static inline int probe_irq_off(unsigned long val)
705{
706 return 0;
707}
708static inline unsigned int probe_irq_mask(unsigned long val)
709{
710 return 0;
711}
712#else
713extern unsigned long probe_irq_on(void);
714extern int probe_irq_off(unsigned long);
715extern unsigned int probe_irq_mask(unsigned long);
716#endif
717
718#ifdef CONFIG_PROC_FS
719
720extern void init_irq_proc(void);
721#else
722static inline void init_irq_proc(void)
723{
724}
725#endif
726
727#ifdef CONFIG_IRQ_TIMINGS
728void irq_timings_enable(void);
729void irq_timings_disable(void);
730u64 irq_timings_next_event(u64 now);
731#endif
732
733struct seq_file;
734int show_interrupts(struct seq_file *p, void *v);
735int arch_show_interrupts(struct seq_file *p, int prec);
736
737extern int early_irq_init(void);
738extern int arch_probe_nr_irqs(void);
739extern int arch_early_irq_init(void);
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744#define __irq_entry __attribute__((__section__(".irqentry.text")))
745#define __softirq_entry \
746 __attribute__((__section__(".softirqentry.text")))
747
748#endif
749