summaryrefslogtreecommitdiff
path: root/include/linux/hrtimer.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/hrtimer.h')
-rw-r--r--include/linux/hrtimer.h48
1 files changed, 44 insertions, 4 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 4971100a8cab..1b9a51a1bccb 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.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;
@@ -341,16 +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
@@ -360,6 +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
@@ -395,6 +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);
@@ -463,11 +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,