diff options
Diffstat (limited to 'include/linux/interrupt.h')
| -rw-r--r-- | include/linux/interrupt.h | 90 |
1 files changed, 85 insertions, 5 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 0c9cb63e6895..91bb76f44f14 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -59,6 +59,18 @@ #define IRQF_NOBALANCING 0x00000800 #define IRQF_IRQPOLL 0x00001000 +/* + * Bits used by threaded handlers: + * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run + * IRQTF_DIED - handler thread died + * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed + */ +enum { + IRQTF_RUNTHREAD, + IRQTF_DIED, + IRQTF_WARNED, +}; + typedef irqreturn_t (*irq_handler_t)(int, void *); /** @@ -71,6 +83,9 @@ typedef irqreturn_t (*irq_handler_t)(int, void *); * @next: pointer to the next irqaction for shared interrupts * @irq: interrupt number * @dir: pointer to the proc/irq/NN/name entry + * @thread_fn: interupt handler function for threaded interrupts + * @thread: thread pointer for threaded interrupts + * @thread_flags: flags related to @thread */ struct irqaction { irq_handler_t handler; @@ -81,18 +96,68 @@ struct irqaction { struct irqaction *next; int irq; struct proc_dir_entry *dir; + irq_handler_t thread_fn; + struct task_struct *thread; + unsigned long thread_flags; }; extern irqreturn_t no_action(int cpl, void *dev_id); -extern int __must_check request_irq(unsigned int, irq_handler_t handler, - unsigned long, const char *, void *); + +#ifdef CONFIG_GENERIC_HARDIRQS +extern int __must_check +request_threaded_irq(unsigned int irq, irq_handler_t handler, + irq_handler_t thread_fn, + unsigned long flags, const char *name, void *dev); + +static inline int __must_check +request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, + const char *name, void *dev) +{ + return request_threaded_irq(irq, handler, NULL, flags, name, dev); +} + +extern void exit_irq_thread(void); +#else + +extern int __must_check +request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, + const char *name, void *dev); + +/* + * Special function to avoid ifdeffery in kernel/irq/devres.c which + * gets magically built by GENERIC_HARDIRQS=n architectures (sparc, + * m68k). I really love these $@%#!* obvious Makefile references: + * ../../../kernel/irq/devres.o + */ +static inline int __must_check +request_threaded_irq(unsigned int irq, irq_handler_t handler, + irq_handler_t thread_fn, + unsigned long flags, const char *name, void *dev) +{ + return request_irq(irq, handler, flags, name, dev); +} + +static inline void exit_irq_thread(void) { } +#endif + extern void free_irq(unsigned int, void *); struct device; -extern int __must_check devm_request_irq(struct device *dev, unsigned int irq, - irq_handler_t handler, unsigned long irqflags, - const char *devname, void *dev_id); +extern int __must_check +devm_request_threaded_irq(struct device *dev, unsigned int irq, + irq_handler_t handler, irq_handler_t thread_fn, + unsigned long irqflags, const char *devname, + void *dev_id); + +static inline int __must_check +devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler, + unsigned long irqflags, const char *devname, void *dev_id) +{ + return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags, + devname, dev_id); +} + extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id); /* @@ -117,6 +182,15 @@ extern void disable_irq_nosync(unsigned int irq); extern void disable_irq(unsigned int irq); extern void enable_irq(unsigned int irq); +/* The following three functions are for the core kernel use only. */ +extern void suspend_device_irqs(void); +extern void resume_device_irqs(void); +#ifdef CONFIG_PM_SLEEP +extern int check_wakeup_irqs(void); +#else +static inline int check_wakeup_irqs(void) { return 0; } +#endif + #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS) extern cpumask_var_t irq_default_affinity; @@ -269,6 +343,11 @@ enum NR_SOFTIRQS }; +/* map softirq index to softirq name. update 'softirq_to_name' in + * kernel/softirq.c when adding a new softirq. + */ +extern char *softirq_to_name[NR_SOFTIRQS]; + /* softirq mask and active fields moved to irq_cpustat_t in * asm/hardirq.h to get better cache usage. KAO */ @@ -285,6 +364,7 @@ extern void softirq_init(void); #define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0) extern void raise_softirq_irqoff(unsigned int nr); extern void raise_softirq(unsigned int nr); +extern void wakeup_softirqd(void); /* This is the worklist that queues up per-cpu softirq work. * |