X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Finterrupt.h;h=7ca72b74eec7e4142866f44debf96f594c70037f;hb=9a1607071c293e48b08bd703733480b1d55c7b93;hp=690113d076989ba5c3b021b64e168295c50db5c7;hpb=950f4427c2ddc921164088a20f01304cf231437c;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 690113d..7ca72b7 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -8,11 +8,13 @@ #include #include #include +#include #include -#include #include -#include -#include +#include +#include +#include + #include #include #include @@ -44,6 +46,12 @@ * IRQF_TIMER - Flag to mark this interrupt as timer interrupt * IRQF_PERCPU - Interrupt is per cpu * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing + * 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 @@ -52,44 +60,108 @@ #define IRQF_TIMER 0x00000200 #define IRQF_PERCPU 0x00000400 #define IRQF_NOBALANCING 0x00000800 +#define IRQF_IRQPOLL 0x00001000 +#define IRQF_ONESHOT 0x00002000 /* - * Migration helpers. Scheduled for removal in 1/2007 - * Do not use for new code ! + * 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 */ -#define SA_INTERRUPT IRQF_DISABLED -#define SA_SAMPLE_RANDOM IRQF_SAMPLE_RANDOM -#define SA_SHIRQ IRQF_SHARED -#define SA_PROBEIRQ IRQF_PROBE_SHARED -#define SA_PERCPU IRQF_PERCPU - -#define SA_TRIGGER_LOW IRQF_TRIGGER_LOW -#define SA_TRIGGER_HIGH IRQF_TRIGGER_HIGH -#define SA_TRIGGER_FALLING IRQF_TRIGGER_FALLING -#define SA_TRIGGER_RISING IRQF_TRIGGER_RISING -#define SA_TRIGGER_MASK IRQF_TRIGGER_MASK +enum { + IRQTF_RUNTHREAD, + IRQTF_DIED, + IRQTF_WARNED, + IRQTF_AFFINITY, +}; typedef irqreturn_t (*irq_handler_t)(int, void *); +/** + * struct irqaction - per interrupt action descriptor + * @handler: interrupt handler function + * @flags: flags (see IRQF_* above) + * @name: name of the device + * @dev_id: cookie to identify the device + * @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; unsigned long flags; - cpumask_t mask; const char *name; void *dev_id; 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 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 *); -extern int devm_request_irq(struct device *dev, unsigned int irq, - irq_handler_t handler, unsigned long irqflags, - const char *devname, void *dev_id); +struct device; + +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); /* @@ -110,11 +182,50 @@ extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id); # define local_irq_enable_in_hardirq() local_irq_enable() #endif -#ifdef CONFIG_GENERIC_HARDIRQS 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. */ +#ifdef CONFIG_GENERIC_HARDIRQS +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 +#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) + +extern cpumask_var_t irq_default_affinity; + +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); + +#else /* CONFIG_SMP */ + +static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m) +{ + return -EINVAL; +} + +static inline int irq_can_set_affinity(unsigned int irq) +{ + return 0; +} + +static inline int irq_select_affinity(unsigned int irq) { return 0; } + +#endif /* CONFIG_SMP && CONFIG_GENERIC_HARDIRQS */ + +#ifdef CONFIG_GENERIC_HARDIRQS /* * Special lockdep variants of irq disabling/enabling. * These should be used for locking constructs that @@ -185,12 +296,25 @@ static inline int disable_irq_wake(unsigned int irq) * validator need to define the methods below in their asm/irq.h * files, under an #ifdef CONFIG_LOCKDEP section. */ -# ifndef CONFIG_LOCKDEP +#ifndef CONFIG_LOCKDEP # define disable_irq_nosync_lockdep(irq) disable_irq_nosync(irq) +# define disable_irq_nosync_lockdep_irqsave(irq, flags) \ + disable_irq_nosync(irq) # define disable_irq_lockdep(irq) disable_irq(irq) # define enable_irq_lockdep(irq) enable_irq(irq) +# define enable_irq_lockdep_irqrestore(irq, flags) \ + enable_irq(irq) # endif +static inline int enable_irq_wake(unsigned int irq) +{ + return 0; +} + +static inline int disable_irq_wake(unsigned int irq) +{ + return 0; +} #endif /* CONFIG_GENERIC_HARDIRQS */ #ifndef __ARCH_SET_SOFTIRQ_PENDING @@ -198,34 +322,15 @@ static inline int disable_irq_wake(unsigned int irq) #define or_softirq_pending(x) (local_softirq_pending() |= (x)) #endif -/* - * Temporary defines for UP kernels, until all code gets fixed. +/* Some architectures might implement lazy enabling/disabling of + * interrupts. In some cases, such as stop_machine, we might want + * to ensure that after a local_irq_disable(), interrupts have + * really been disabled in hardware. Such architectures need to + * implement the following hook. */ -#ifndef CONFIG_SMP -static inline void __deprecated cli(void) -{ - local_irq_disable(); -} -static inline void __deprecated sti(void) -{ - local_irq_enable(); -} -static inline void __deprecated save_flags(unsigned long *x) -{ - local_save_flags(*x); -} -#define save_flags(x) save_flags(&x) -static inline void __deprecated restore_flags(unsigned long x) -{ - local_irq_restore(x); -} - -static inline void __deprecated save_and_cli(unsigned long *x) -{ - local_irq_save(*x); -} -#define save_and_cli(x) save_and_cli(&x) -#endif /* CONFIG_SMP */ +#ifndef hard_irq_disable +#define hard_irq_disable() do { } while(0) +#endif /* PLEASE, avoid to allocate new softirqs, if you need not _really_ high frequency threaded job scheduling. For almost all the purposes @@ -240,10 +345,20 @@ enum NET_TX_SOFTIRQ, NET_RX_SOFTIRQ, BLOCK_SOFTIRQ, + BLOCK_IOPOLL_SOFTIRQ, TASKLET_SOFTIRQ, SCHED_SOFTIRQ, + HRTIMER_SOFTIRQ, + RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */ + + 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 */ @@ -251,16 +366,36 @@ enum struct softirq_action { void (*action)(struct softirq_action *); - void *data; }; asmlinkage void do_softirq(void); -extern void open_softirq(int nr, void (*action)(struct softirq_action*), void *data); +asmlinkage void __do_softirq(void); +extern void open_softirq(int nr, void (*action)(struct softirq_action *)); extern void softirq_init(void); #define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0) -extern void FASTCALL(raise_softirq_irqoff(unsigned int nr)); -extern void FASTCALL(raise_softirq(unsigned int nr)); +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. + * + * send_remote_sendirq() adds work to these lists, and + * the softirq handler itself dequeues from them. The queues + * are protected by disabling local cpu interrupts and they must + * only be accessed by the local cpu that they are for. + */ +DECLARE_PER_CPU(struct list_head [NR_SOFTIRQS], softirq_work_list); + +/* Try to send a softirq to a remote cpu. If this cannot be done, the + * work will be queued to the local cpu. + */ +extern void send_remote_softirq(struct call_single_data *cp, int cpu, int softirq); + +/* Like send_remote_softirq(), but the caller must disable local cpu interrupts + * and compute the current cpu, passed in as 'this_cpu'. + */ +extern void __send_remote_softirq(struct call_single_data *cp, int cpu, + int this_cpu, int softirq); /* Tasklets --- multithreaded analogue of BHs. @@ -326,7 +461,7 @@ static inline void tasklet_unlock_wait(struct tasklet_struct *t) #define tasklet_unlock(t) do { } while (0) #endif -extern void FASTCALL(__tasklet_schedule(struct tasklet_struct *t)); +extern void __tasklet_schedule(struct tasklet_struct *t); static inline void tasklet_schedule(struct tasklet_struct *t) { @@ -334,7 +469,7 @@ static inline void tasklet_schedule(struct tasklet_struct *t) __tasklet_schedule(t); } -extern void FASTCALL(__tasklet_hi_schedule(struct tasklet_struct *t)); +extern void __tasklet_hi_schedule(struct tasklet_struct *t); static inline void tasklet_hi_schedule(struct tasklet_struct *t) { @@ -342,6 +477,20 @@ static inline void tasklet_hi_schedule(struct tasklet_struct *t) __tasklet_hi_schedule(t); } +extern void __tasklet_hi_schedule_first(struct tasklet_struct *t); + +/* + * This version avoids touching any other tasklets. Needed for kmemcheck + * in order not to take any page faults while enqueueing this tasklet; + * consider VERY carefully whether you really need this or + * tasklet_hi_schedule()... + */ +static inline void tasklet_hi_schedule_first(struct tasklet_struct *t) +{ + if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) + __tasklet_hi_schedule_first(t); +} + static inline void tasklet_disable_nosync(struct tasklet_struct *t) { @@ -373,6 +522,31 @@ 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: * @@ -420,4 +594,29 @@ extern int probe_irq_off(unsigned long); /* returns 0 or negative on failure */ extern unsigned int probe_irq_mask(unsigned long); /* returns mask of ISA interrupts */ #endif +#ifdef CONFIG_PROC_FS +/* Initialize /proc/irq/ */ +extern void init_irq_proc(void); +#else +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; + +extern int early_irq_init(void); +extern int arch_probe_nr_irqs(void); +extern int arch_early_irq_init(void); +extern int arch_init_chip_data(struct irq_desc *desc, int node); + #endif