X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Finterrupt.h;h=c2331138ca1bb5e3d9b543b9f3d71d92b95fb399;hb=a1bd120d13e586ea1c424048fd2c8420a442852a;hp=dd574d51bcaa8c0c88f3b2e2085f62ed07c32347;hpb=7c692cbade8b8884f1c20500393bcc7cd6d24ef8;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index dd574d5..c233113 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -10,10 +10,10 @@ #include #include #include -#include #include #include #include +#include #include #include @@ -39,7 +39,8 @@ * These flags used only by the kernel as part of the * irq handling routines. * - * IRQF_DISABLED - keep irqs disabled when calling the action handler + * IRQF_DISABLED - keep irqs disabled when calling the action handler. + * DEPRECATED. This flag is a NOOP and scheduled to be removed * IRQF_SAMPLE_RANDOM - irq is used to feed the random generator * IRQF_SHARED - allow sharing the irq among several devices * IRQF_PROBE_SHARED - set by callers when they expect sharing mismatches to occur @@ -49,6 +50,9 @@ * IRQF_IRQPOLL - Interrupt is used for polling (only the interrupt that is * registered first in an shared interrupt is considered for * performance reasons) + * IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished. + * Used by threaded interrupts which need to keep the + * irq line disabled until the threaded handler has been run. */ #define IRQF_DISABLED 0x00000020 #define IRQF_SAMPLE_RANDOM 0x00000040 @@ -58,17 +62,32 @@ #define IRQF_PERCPU 0x00000400 #define IRQF_NOBALANCING 0x00000800 #define IRQF_IRQPOLL 0x00001000 +#define IRQF_ONESHOT 0x00002000 /* * 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 + * IRQTF_AFFINITY - irq thread is requested to adjust affinity */ enum { IRQTF_RUNTHREAD, IRQTF_DIED, IRQTF_WARNED, + IRQTF_AFFINITY, +}; + +/* + * These values can be returned by request_any_context_irq() and + * describe the context the interrupt will be run in. + * + * IRQC_IS_HARDIRQ - interrupt runs in hardirq context + * IRQC_IS_NESTED - interrupt runs in a nested threaded context + */ +enum { + IRQC_IS_HARDIRQ = 0, + IRQC_IS_NESTED, }; typedef irqreturn_t (*irq_handler_t)(int, void *); @@ -77,7 +96,6 @@ typedef irqreturn_t (*irq_handler_t)(int, void *); * struct irqaction - per interrupt action descriptor * @handler: interrupt handler function * @flags: flags (see IRQF_* above) - * @mask: no comment as it is useless and about to be removed * @name: name of the device * @dev_id: cookie to identify the device * @next: pointer to the next irqaction for shared interrupts @@ -90,7 +108,6 @@ typedef irqreturn_t (*irq_handler_t)(int, void *); struct irqaction { irq_handler_t handler; unsigned long flags; - cpumask_t mask; const char *name; void *dev_id; struct irqaction *next; @@ -116,6 +133,10 @@ request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, return request_threaded_irq(irq, handler, NULL, flags, name, dev); } +extern int __must_check +request_any_context_irq(unsigned int irq, irq_handler_t handler, + unsigned long flags, const char *name, void *dev_id); + extern void exit_irq_thread(void); #else @@ -137,6 +158,13 @@ request_threaded_irq(unsigned int irq, irq_handler_t handler, return request_irq(irq, handler, flags, name, dev); } +static inline int __must_check +request_any_context_irq(unsigned int irq, irq_handler_t handler, + unsigned long flags, const char *name, void *dev_id) +{ + return request_irq(irq, handler, flags, name, dev_id); +} + static inline void exit_irq_thread(void) { } #endif @@ -183,6 +211,7 @@ 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. */ +#ifdef CONFIG_GENERIC_HARDIRQS extern void suspend_device_irqs(void); extern void resume_device_irqs(void); #ifdef CONFIG_PM_SLEEP @@ -190,6 +219,11 @@ extern int check_wakeup_irqs(void); #else static inline int check_wakeup_irqs(void) { return 0; } #endif +#else +static inline void suspend_device_irqs(void) { }; +static inline void resume_device_irqs(void) { }; +static inline int check_wakeup_irqs(void) { return 0; } +#endif #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS) @@ -199,6 +233,7 @@ extern int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask); extern int irq_can_set_affinity(unsigned int irq); extern int irq_select_affinity(unsigned int irq); +extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m); #else /* CONFIG_SMP */ static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m) @@ -213,6 +248,11 @@ static inline int irq_can_set_affinity(unsigned int irq) static inline int irq_select_affinity(unsigned int irq) { return 0; } +static inline int irq_set_affinity_hint(unsigned int irq, + const struct cpumask *m) +{ + return -EINVAL; +} #endif /* CONFIG_SMP && CONFIG_GENERIC_HARDIRQS */ #ifdef CONFIG_GENERIC_HARDIRQS @@ -335,6 +375,7 @@ enum NET_TX_SOFTIRQ, NET_RX_SOFTIRQ, BLOCK_SOFTIRQ, + BLOCK_IOPOLL_SOFTIRQ, TASKLET_SOFTIRQ, SCHED_SOFTIRQ, HRTIMER_SOFTIRQ, @@ -511,6 +552,31 @@ extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu); extern void tasklet_init(struct tasklet_struct *t, void (*func)(unsigned long), unsigned long data); +struct tasklet_hrtimer { + struct hrtimer timer; + struct tasklet_struct tasklet; + enum hrtimer_restart (*function)(struct hrtimer *); +}; + +extern void +tasklet_hrtimer_init(struct tasklet_hrtimer *ttimer, + enum hrtimer_restart (*function)(struct hrtimer *), + clockid_t which_clock, enum hrtimer_mode mode); + +static inline +int tasklet_hrtimer_start(struct tasklet_hrtimer *ttimer, ktime_t time, + const enum hrtimer_mode mode) +{ + return hrtimer_start(&ttimer->timer, time, mode); +} + +static inline +void tasklet_hrtimer_cancel(struct tasklet_hrtimer *ttimer) +{ + hrtimer_cancel(&ttimer->timer); + tasklet_kill(&ttimer->tasklet); +} + /* * Autoprobing for irqs: * @@ -567,12 +633,7 @@ static inline void init_irq_proc(void) } #endif -#if defined(CONFIG_GENERIC_HARDIRQS) && defined(CONFIG_DEBUG_SHIRQ) -extern void debug_poll_all_shared_irqs(void); -#else -static inline void debug_poll_all_shared_irqs(void) { } -#endif - +struct seq_file; int show_interrupts(struct seq_file *p, void *v); struct irq_desc;