diff options
Diffstat (limited to 'include/linux/hrtimer.h')
| -rw-r--r-- | include/linux/hrtimer.h | 64 |
1 files changed, 45 insertions, 19 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 2e8957eac4d4..1b9a51a1bccb 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -12,8 +12,8 @@ #ifndef _LINUX_HRTIMER_H #define _LINUX_HRTIMER_H +#include <linux/hrtimer_defs.h> #include <linux/rbtree.h> -#include <linux/ktime.h> #include <linux/init.h> #include <linux/list.h> #include <linux/percpu.h> @@ -32,12 +32,15 @@ struct hrtimer_cpu_base; * when starting the timer) * HRTIMER_MODE_SOFT - Timer callback function will be executed in * soft irq context + * HRTIMER_MODE_HARD - Timer callback function will be executed in + * hard irq context even on PREEMPT_RT. */ enum hrtimer_mode { HRTIMER_MODE_ABS = 0x00, HRTIMER_MODE_REL = 0x01, HRTIMER_MODE_PINNED = 0x02, HRTIMER_MODE_SOFT = 0x04, + HRTIMER_MODE_HARD = 0x08, HRTIMER_MODE_ABS_PINNED = HRTIMER_MODE_ABS | HRTIMER_MODE_PINNED, HRTIMER_MODE_REL_PINNED = HRTIMER_MODE_REL | HRTIMER_MODE_PINNED, @@ -48,6 +51,11 @@ enum hrtimer_mode { HRTIMER_MODE_ABS_PINNED_SOFT = HRTIMER_MODE_ABS_PINNED | HRTIMER_MODE_SOFT, HRTIMER_MODE_REL_PINNED_SOFT = HRTIMER_MODE_REL_PINNED | HRTIMER_MODE_SOFT, + HRTIMER_MODE_ABS_HARD = HRTIMER_MODE_ABS | HRTIMER_MODE_HARD, + HRTIMER_MODE_REL_HARD = HRTIMER_MODE_REL | HRTIMER_MODE_HARD, + + HRTIMER_MODE_ABS_PINNED_HARD = HRTIMER_MODE_ABS_PINNED | HRTIMER_MODE_HARD, + HRTIMER_MODE_REL_PINNED_HARD = HRTIMER_MODE_REL_PINNED | HRTIMER_MODE_HARD, }; /* @@ -101,6 +109,8 @@ enum hrtimer_restart { * @state: state information (See bit values above) * @is_rel: Set if the timer was armed relative * @is_soft: Set if hrtimer will be expired in soft interrupt context. + * @is_hard: Set if hrtimer will be expired in hard interrupt context + * even on RT. * * The hrtimer structure must be initialized by hrtimer_init() */ @@ -112,6 +122,7 @@ struct hrtimer { u8 state; u8 is_rel; u8 is_soft; + u8 is_hard; }; /** @@ -183,6 +194,10 @@ enum hrtimer_base_type { * @nr_retries: Total number of hrtimer interrupt retries * @nr_hangs: Total number of hrtimer interrupt hangs * @max_hang_time: Maximum time spent in hrtimer_interrupt + * @softirq_expiry_lock: Lock which is taken while softirq based hrtimer are + * expired + * @timer_waiters: A hrtimer_cancel() invocation waits for the timer + * callback to finish. * @expires_next: absolute time of the next event, is required for remote * hrtimer enqueue; it is the total first expiry time (hard * and soft hrtimer are taken into account) @@ -210,6 +225,10 @@ struct hrtimer_cpu_base { unsigned short nr_hangs; unsigned int max_hang_time; #endif +#ifdef CONFIG_PREEMPT_RT + spinlock_t softirq_expiry_lock; + atomic_t timer_waiters; +#endif ktime_t expires_next; struct hrtimer *next_timer; ktime_t softirq_expires_next; @@ -298,26 +317,12 @@ struct clock_event_device; extern void hrtimer_interrupt(struct clock_event_device *dev); -/* - * The resolution of the clocks. The resolution value is returned in - * the clock_getres() system call to give application programmers an - * idea of the (in)accuracy of timers. Timer values are rounded up to - * this resolution values. - */ -# define HIGH_RES_NSEC 1 -# define KTIME_HIGH_RES (HIGH_RES_NSEC) -# define MONOTONIC_RES_NSEC HIGH_RES_NSEC -# define KTIME_MONOTONIC_RES KTIME_HIGH_RES - extern void clock_was_set_delayed(void); extern unsigned int hrtimer_resolution; #else -# define MONOTONIC_RES_NSEC LOW_RES_NSEC -# define KTIME_MONOTONIC_RES KTIME_LOW_RES - #define hrtimer_resolution (unsigned int)LOW_RES_NSEC static inline void clock_was_set_delayed(void) { } @@ -355,16 +360,29 @@ extern void hrtimers_resume(void); DECLARE_PER_CPU(struct tick_device, tick_cpu_device); +#ifdef CONFIG_PREEMPT_RT +void hrtimer_cancel_wait_running(const struct hrtimer *timer); +#else +static inline void hrtimer_cancel_wait_running(struct hrtimer *timer) +{ + cpu_relax(); +} +#endif /* Exported timer functions: */ /* Initialize timers: */ extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock, enum hrtimer_mode mode); +extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, clockid_t clock_id, + enum hrtimer_mode mode); #ifdef CONFIG_DEBUG_OBJECTS_TIMERS extern void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t which_clock, enum hrtimer_mode mode); +extern void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl, + clockid_t clock_id, + enum hrtimer_mode mode); extern void destroy_hrtimer_on_stack(struct hrtimer *timer); #else @@ -374,6 +392,14 @@ static inline void hrtimer_init_on_stack(struct hrtimer *timer, { hrtimer_init(timer, which_clock, mode); } + +static inline void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl, + clockid_t clock_id, + enum hrtimer_mode mode) +{ + hrtimer_init_sleeper(sl, clock_id, mode); +} + static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { } #endif @@ -409,6 +435,9 @@ static inline void hrtimer_start_expires(struct hrtimer *timer, hrtimer_start_range_ns(timer, soft, delta, mode); } +void hrtimer_sleeper_start_expires(struct hrtimer_sleeper *sl, + enum hrtimer_mode mode); + static inline void hrtimer_restart(struct hrtimer *timer) { hrtimer_start_expires(timer, HRTIMER_MODE_ABS); @@ -477,11 +506,8 @@ extern long hrtimer_nanosleep(const struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); -extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, - struct task_struct *tsk); - extern int schedule_hrtimeout_range(ktime_t *expires, u64 delta, - const enum hrtimer_mode mode); + const enum hrtimer_mode mode); extern int schedule_hrtimeout_range_clock(ktime_t *expires, u64 delta, const enum hrtimer_mode mode, |