diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/interrupt.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/interrupt.h | 703 |
1 files changed, 0 insertions, 703 deletions
diff --git a/ANDROID_3.4.5/include/linux/interrupt.h b/ANDROID_3.4.5/include/linux/interrupt.h deleted file mode 100644 index 2aea5d22..00000000 --- a/ANDROID_3.4.5/include/linux/interrupt.h +++ /dev/null @@ -1,703 +0,0 @@ -/* interrupt.h */ -#ifndef _LINUX_INTERRUPT_H -#define _LINUX_INTERRUPT_H - -#include <linux/kernel.h> -#include <linux/linkage.h> -#include <linux/bitops.h> -#include <linux/preempt.h> -#include <linux/cpumask.h> -#include <linux/irqreturn.h> -#include <linux/irqnr.h> -#include <linux/hardirq.h> -#include <linux/irqflags.h> -#include <linux/smp.h> -#include <linux/percpu.h> -#include <linux/hrtimer.h> -#include <linux/kref.h> -#include <linux/workqueue.h> - -#include <linux/atomic.h> -#include <asm/ptrace.h> - -/* - * These correspond to the IORESOURCE_IRQ_* defines in - * linux/ioport.h to select the interrupt line behaviour. When - * requesting an interrupt without specifying a IRQF_TRIGGER, the - * setting should be assumed to be "as already configured", which - * may be as per machine or firmware initialisation. - */ -#define IRQF_TRIGGER_NONE 0x00000000 -#define IRQF_TRIGGER_RISING 0x00000001 -#define IRQF_TRIGGER_FALLING 0x00000002 -#define IRQF_TRIGGER_HIGH 0x00000004 -#define IRQF_TRIGGER_LOW 0x00000008 -#define IRQF_TRIGGER_MASK (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \ - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING) -#define IRQF_TRIGGER_PROBE 0x00000010 - -/* - * These flags used only by the kernel as part of the - * irq handling routines. - * - * 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 - * 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. - * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend - * IRQF_FORCE_RESUME - Force enable it on resume even if IRQF_NO_SUSPEND is set - * IRQF_NO_THREAD - Interrupt cannot be threaded - * IRQF_EARLY_RESUME - Resume IRQ early during syscore instead of at device - * resume time. - */ -#define IRQF_DISABLED 0x00000020 -#define IRQF_SAMPLE_RANDOM 0x00000040 -#define IRQF_SHARED 0x00000080 -#define IRQF_PROBE_SHARED 0x00000100 -#define __IRQF_TIMER 0x00000200 -#define IRQF_PERCPU 0x00000400 -#define IRQF_NOBALANCING 0x00000800 -#define IRQF_IRQPOLL 0x00001000 -#define IRQF_ONESHOT 0x00002000 -#define IRQF_NO_SUSPEND 0x00004000 -#define IRQF_FORCE_RESUME 0x00008000 -#define IRQF_NO_THREAD 0x00010000 -#define IRQF_EARLY_RESUME 0x00020000 - -#define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD) - -/* - * 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 *); - -/** - * 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 - * @percpu_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: interrupt handler function for threaded interrupts - * @thread: thread pointer for threaded interrupts - * @thread_flags: flags related to @thread - * @thread_mask: bitmask for keeping track of @thread activity - */ -struct irqaction { - irq_handler_t handler; - unsigned long flags; - void *dev_id; - void __percpu *percpu_dev_id; - struct irqaction *next; - int irq; - irq_handler_t thread_fn; - struct task_struct *thread; - unsigned long thread_flags; - unsigned long thread_mask; - const char *name; - struct proc_dir_entry *dir; -} ____cacheline_internodealigned_in_smp; - -extern irqreturn_t no_action(int cpl, void *dev_id); - -#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 int __must_check -request_any_context_irq(unsigned int irq, irq_handler_t handler, - unsigned long flags, const char *name, void *dev_id); - -extern int __must_check -request_percpu_irq(unsigned int irq, irq_handler_t handler, - const char *devname, void __percpu *percpu_dev_id); - -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 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 int __must_check -request_percpu_irq(unsigned int irq, irq_handler_t handler, - const char *devname, void __percpu *percpu_dev_id) -{ - return request_irq(irq, handler, 0, devname, percpu_dev_id); -} - -static inline void exit_irq_thread(void) { } -#endif - -extern void free_irq(unsigned int, void *); -extern void free_percpu_irq(unsigned int, void __percpu *); - -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); - -/* - * On lockdep we dont want to enable hardirqs in hardirq - * context. Use local_irq_enable_in_hardirq() to annotate - * kernel code that has to do this nevertheless (pretty much - * the only valid case is for old/broken hardware that is - * insanely slow). - * - * NOTE: in theory this might break fragile code that relies - * on hardirq delivery - in practice we dont seem to have such - * places left. So the only effect should be slightly increased - * irqs-off latencies. - */ -#ifdef CONFIG_LOCKDEP -# define local_irq_enable_in_hardirq() do { } while (0) -#else -# define local_irq_enable_in_hardirq() local_irq_enable() -#endif - -extern void disable_irq_nosync(unsigned int irq); -extern void disable_irq(unsigned int irq); -extern void disable_percpu_irq(unsigned int irq); -extern void enable_irq(unsigned int irq); -extern void enable_percpu_irq(unsigned int irq, unsigned int type); - -/* 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); - -extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m); - -/** - * struct irq_affinity_notify - context for notification of IRQ affinity changes - * @irq: Interrupt to which notification applies - * @kref: Reference count, for internal use - * @work: Work item, for internal use - * @notify: Function to be called on change. This will be - * called in process context. - * @release: Function to be called on release. This will be - * called in process context. Once registered, the - * structure must only be freed when this function is - * called or later. - */ -struct irq_affinity_notify { - unsigned int irq; - struct kref kref; - struct work_struct work; - void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask); - void (*release)(struct kref *ref); -}; - -extern int -irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify); - -static inline void irq_run_affinity_notifiers(void) -{ - flush_scheduled_work(); -} - -#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; } - -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 -/* - * Special lockdep variants of irq disabling/enabling. - * These should be used for locking constructs that - * know that a particular irq context which is disabled, - * and which is the only irq-context user of a lock, - * that it's safe to take the lock in the irq-disabled - * section without disabling hardirqs. - * - * On !CONFIG_LOCKDEP they are equivalent to the normal - * irq disable/enable methods. - */ -static inline void disable_irq_nosync_lockdep(unsigned int irq) -{ - disable_irq_nosync(irq); -#ifdef CONFIG_LOCKDEP - local_irq_disable(); -#endif -} - -static inline void disable_irq_nosync_lockdep_irqsave(unsigned int irq, unsigned long *flags) -{ - disable_irq_nosync(irq); -#ifdef CONFIG_LOCKDEP - local_irq_save(*flags); -#endif -} - -static inline void disable_irq_lockdep(unsigned int irq) -{ - disable_irq(irq); -#ifdef CONFIG_LOCKDEP - local_irq_disable(); -#endif -} - -static inline void enable_irq_lockdep(unsigned int irq) -{ -#ifdef CONFIG_LOCKDEP - local_irq_enable(); -#endif - enable_irq(irq); -} - -static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long *flags) -{ -#ifdef CONFIG_LOCKDEP - local_irq_restore(*flags); -#endif - enable_irq(irq); -} - -/* IRQ wakeup (PM) control: */ -extern int irq_set_irq_wake(unsigned int irq, unsigned int on); - -static inline int enable_irq_wake(unsigned int irq) -{ - return irq_set_irq_wake(irq, 1); -} - -static inline int disable_irq_wake(unsigned int irq) -{ - return irq_set_irq_wake(irq, 0); -} - -#else /* !CONFIG_GENERIC_HARDIRQS */ -/* - * NOTE: non-genirq architectures, if they want to support the lock - * validator need to define the methods below in their asm/irq.h - * files, under an #ifdef CONFIG_LOCKDEP section. - */ -#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 */ - - -#ifdef CONFIG_IRQ_FORCED_THREADING -extern bool force_irqthreads; -#else -#define force_irqthreads (0) -#endif - -#ifndef __ARCH_SET_SOFTIRQ_PENDING -#define set_softirq_pending(x) (local_softirq_pending() = (x)) -#define or_softirq_pending(x) (local_softirq_pending() |= (x)) -#endif - -/* 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 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 - tasklets are more than enough. F.e. all serial device BHs et - al. should be converted to tasklets, not to softirqs. - */ - -enum -{ - HI_SOFTIRQ=0, - TIMER_SOFTIRQ, - 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 - */ - -struct softirq_action -{ - void (*action)(struct softirq_action *); -}; - -asmlinkage void do_softirq(void); -asmlinkage void __do_softirq(void); -extern void open_softirq(int nr, void (*action)(struct softirq_action *)); -extern void softirq_init(void); -extern void __raise_softirq_irqoff(unsigned int nr); - -extern void raise_softirq_irqoff(unsigned int nr); -extern void raise_softirq(unsigned int nr); - -/* 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); - -DECLARE_PER_CPU(struct task_struct *, ksoftirqd); - -static inline struct task_struct *this_cpu_ksoftirqd(void) -{ - return this_cpu_read(ksoftirqd); -} - -/* 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. - - Main feature differing them of generic softirqs: tasklet - is running only on one CPU simultaneously. - - Main feature differing them of BHs: different tasklets - may be run simultaneously on different CPUs. - - Properties: - * If tasklet_schedule() is called, then tasklet is guaranteed - to be executed on some cpu at least once after this. - * If the tasklet is already scheduled, but its execution is still not - started, it will be executed only once. - * If this tasklet is already running on another CPU (or schedule is called - from tasklet itself), it is rescheduled for later. - * Tasklet is strictly serialized wrt itself, but not - wrt another tasklets. If client needs some intertask synchronization, - he makes it with spinlocks. - */ - -struct tasklet_struct -{ - struct tasklet_struct *next; - unsigned long state; - atomic_t count; - void (*func)(unsigned long); - unsigned long data; -}; - -#define DECLARE_TASKLET(name, func, data) \ -struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(0), func, data } - -#define DECLARE_TASKLET_DISABLED(name, func, data) \ -struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(1), func, data } - - -enum -{ - TASKLET_STATE_SCHED, /* Tasklet is scheduled for execution */ - TASKLET_STATE_RUN /* Tasklet is running (SMP only) */ -}; - -#ifdef CONFIG_SMP -static inline int tasklet_trylock(struct tasklet_struct *t) -{ - return !test_and_set_bit(TASKLET_STATE_RUN, &(t)->state); -} - -static inline void tasklet_unlock(struct tasklet_struct *t) -{ - smp_mb__before_clear_bit(); - clear_bit(TASKLET_STATE_RUN, &(t)->state); -} - -static inline void tasklet_unlock_wait(struct tasklet_struct *t) -{ - while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); } -} -#else -#define tasklet_trylock(t) 1 -#define tasklet_unlock_wait(t) do { } while (0) -#define tasklet_unlock(t) do { } while (0) -#endif - -extern void __tasklet_schedule(struct tasklet_struct *t); - -static inline void tasklet_schedule(struct tasklet_struct *t) -{ - if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) - __tasklet_schedule(t); -} - -extern void __tasklet_hi_schedule(struct tasklet_struct *t); - -static inline void tasklet_hi_schedule(struct tasklet_struct *t) -{ - if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) - __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) -{ - atomic_inc(&t->count); - smp_mb__after_atomic_inc(); -} - -static inline void tasklet_disable(struct tasklet_struct *t) -{ - tasklet_disable_nosync(t); - tasklet_unlock_wait(t); - smp_mb(); -} - -static inline void tasklet_enable(struct tasklet_struct *t) -{ - smp_mb__before_atomic_dec(); - atomic_dec(&t->count); -} - -static inline void tasklet_hi_enable(struct tasklet_struct *t) -{ - smp_mb__before_atomic_dec(); - atomic_dec(&t->count); -} - -extern void tasklet_kill(struct tasklet_struct *t); -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: - * - * probe_irq_on() and probe_irq_off() provide robust primitives - * for accurate IRQ probing during kernel initialization. They are - * reasonably simple to use, are not "fooled" by spurious interrupts, - * and, unlike other attempts at IRQ probing, they do not get hung on - * stuck interrupts (such as unused PS2 mouse interfaces on ASUS boards). - * - * For reasonably foolproof probing, use them as follows: - * - * 1. clear and/or mask the device's internal interrupt. - * 2. sti(); - * 3. irqs = probe_irq_on(); // "take over" all unassigned idle IRQs - * 4. enable the device and cause it to trigger an interrupt. - * 5. wait for the device to interrupt, using non-intrusive polling or a delay. - * 6. irq = probe_irq_off(irqs); // get IRQ number, 0=none, negative=multiple - * 7. service the device to clear its pending interrupt. - * 8. loop again if paranoia is required. - * - * probe_irq_on() returns a mask of allocated irq's. - * - * probe_irq_off() takes the mask as a parameter, - * and returns the irq number which occurred, - * or zero if none occurred, or a negative irq number - * if more than one irq occurred. - */ - -#if defined(CONFIG_GENERIC_HARDIRQS) && !defined(CONFIG_GENERIC_IRQ_PROBE) -static inline unsigned long probe_irq_on(void) -{ - return 0; -} -static inline int probe_irq_off(unsigned long val) -{ - return 0; -} -static inline unsigned int probe_irq_mask(unsigned long val) -{ - return 0; -} -#else -extern unsigned long probe_irq_on(void); /* returns 0 on failure */ -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 - -struct seq_file; -int show_interrupts(struct seq_file *p, void *v); -int arch_show_interrupts(struct seq_file *p, int prec); - -extern int early_irq_init(void); -extern int arch_probe_nr_irqs(void); -extern int arch_early_irq_init(void); - -#endif |