include/linux/interrupt.h

19 #include <asm/irq.h>
40  * irq handling routines.
42  * IRQF_SHARED - allow sharing the irq among several devices
46  * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing
52  *                irq line disabled until the threaded handler has been run.
53  * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend.  Does not guarantee
58  * IRQF_EARLY_RESUME - Resume IRQ early during syscore instead of at device
60  * IRQF_COND_SUSPEND - If the IRQ is shared with a NO_SUSPEND user, execute this
101  * @irq:	interrupt number
108  * @dir:	pointer to the proc/irq/NN/name entry
118 	unsigned int		irq;  member
129  * If a (PCI) device interrupt is not connected we set dev->irq to
139 request_threaded_irq(unsigned int irq, irq_handler_t handler,
145  * @irq:	The interrupt line to allocate
146  * @handler:	Function to be called when the IRQ occurs.
157 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,  in request_irq()  argument
160 	return request_threaded_irq(irq, handler, NULL, flags, name, dev);  in request_irq()
164 request_any_context_irq(unsigned int irq, irq_handler_t handler,
168 __request_percpu_irq(unsigned int irq, irq_handler_t handler,
173 request_nmi(unsigned int irq, irq_handler_t handler, unsigned long flags,
177 request_percpu_irq(unsigned int irq, irq_handler_t handler,  in request_percpu_irq()  argument
180 	return __request_percpu_irq(irq, handler, 0,  in request_percpu_irq()
185 request_percpu_nmi(unsigned int irq, irq_handler_t handler,
191 extern const void *free_nmi(unsigned int irq, void *dev_id);
192 extern void free_percpu_nmi(unsigned int irq, void __percpu *percpu_dev_id);
197 devm_request_threaded_irq(struct device *dev, unsigned int irq,
203 devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler,  in devm_request_irq()  argument
206 	return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,  in devm_request_irq()
211 devm_request_any_context_irq(struct device *dev, unsigned int irq,
215 extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
235 extern void disable_irq_nosync(unsigned int irq);
236 extern bool disable_hardirq(unsigned int irq);
237 extern void disable_irq(unsigned int irq);
238 extern void disable_percpu_irq(unsigned int irq);
239 extern void enable_irq(unsigned int irq);
240 extern void enable_percpu_irq(unsigned int irq, unsigned int type);
241 extern bool irq_percpu_is_enabled(unsigned int irq);
242 extern void irq_wake_thread(unsigned int irq, void *dev_id);
244 extern void disable_nmi_nosync(unsigned int irq);
245 extern void disable_percpu_nmi(unsigned int irq);
246 extern void enable_nmi(unsigned int irq);
247 extern void enable_percpu_nmi(unsigned int irq, unsigned int type);
248 extern int prepare_percpu_nmi(unsigned int irq);
249 extern void teardown_percpu_nmi(unsigned int irq);
251 extern int irq_inject_interrupt(unsigned int irq);
256 extern void rearm_wake_irq(unsigned int irq);
259  * struct irq_affinity_notify - context for notification of IRQ affinity changes
260  * @irq:		Interrupt to which notification applies
271 	unsigned int irq;  member
281  * struct irq_affinity - Description for automatic irq affinity assignements
318 extern int __irq_set_affinity(unsigned int irq, const struct cpumask *cpumask,
322  * irq_set_affinity - Set the irq affinity of a given irq
323  * @irq:	Interrupt to set affinity
329 irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)  in irq_set_affinity()  argument
331 	return __irq_set_affinity(irq, cpumask, false);  in irq_set_affinity()
335  * irq_force_affinity - Force the irq affinity of a given irq
336  * @irq:	Interrupt to set affinity
346 irq_force_affinity(unsigned int irq, const struct cpumask *cpumask)  in irq_force_affinity()  argument
348 	return __irq_set_affinity(irq, cpumask, true);  in irq_force_affinity()
351 extern int irq_can_set_affinity(unsigned int irq);
352 extern int irq_select_affinity(unsigned int irq);
354 extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);
357 irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
367 static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)  in irq_set_affinity()  argument
372 static inline int irq_force_affinity(unsigned int irq, const struct cpumask *cpumask)  in irq_force_affinity()  argument
377 static inline int irq_can_set_affinity(unsigned int irq)  in irq_can_set_affinity()  argument
382 static inline int irq_select_affinity(unsigned int irq)  { return 0; }  in irq_select_affinity()  argument
384 static inline int irq_set_affinity_hint(unsigned int irq,  in irq_set_affinity_hint()  argument
391 irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)  in irq_set_affinity_notifier()  argument
412  * Special lockdep variants of irq disabling/enabling.
414  * know that a particular irq context which is disabled,
415  * and which is the only irq-context user of a lock,
416  * that it's safe to take the lock in the irq-disabled
420  * irq disable/enable methods.
422 static inline void disable_irq_nosync_lockdep(unsigned int irq)  in disable_irq_nosync_lockdep()  argument
424 	disable_irq_nosync(irq);  in disable_irq_nosync_lockdep()
430 static inline void disable_irq_nosync_lockdep_irqsave(unsigned int irq, unsigned long *flags)  in disable_irq_nosync_lockdep_irqsave()  argument
432 	disable_irq_nosync(irq);  in disable_irq_nosync_lockdep_irqsave()
438 static inline void disable_irq_lockdep(unsigned int irq)  in disable_irq_lockdep()  argument
440 	disable_irq(irq);  in disable_irq_lockdep()
446 static inline void enable_irq_lockdep(unsigned int irq)  in enable_irq_lockdep()  argument
451 	enable_irq(irq);  in enable_irq_lockdep()
454 static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long *flags)  in enable_irq_lockdep_irqrestore()  argument
459 	enable_irq(irq);  in enable_irq_lockdep_irqrestore()
462 /* IRQ wakeup (PM) control: */
463 extern int irq_set_irq_wake(unsigned int irq, unsigned int on);
465 static inline int enable_irq_wake(unsigned int irq)  in enable_irq_wake()  argument
467 	return irq_set_irq_wake(irq, 1);  in enable_irq_wake()
470 static inline int disable_irq_wake(unsigned int irq)  in disable_irq_wake()  argument
472 	return irq_set_irq_wake(irq, 0);  in disable_irq_wake()
482 	IRQCHIP_STATE_LINE_LEVEL,	/* Is IRQ line high? */
485 extern int irq_get_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
487 extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
725  * for accurate IRQ probing during kernel initialization.  They are
727  * and, unlike other attempts at IRQ probing, they do not get hung on
737  * 6. irq = probe_irq_off(irqs);  // get IRQ number, 0=none, negative=multiple
741  * probe_irq_on() returns a mask of allocated irq's.
744  * and returns the irq number which occurred,
745  * or zero if none occurred, or a negative irq number
746  * if more than one irq occurred.
769 /* Initialize /proc/irq/ */