^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _TICK_SCHED_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _TICK_SCHED_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/hrtimer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) enum tick_device_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) TICKDEV_MODE_PERIODIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) TICKDEV_MODE_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct tick_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct clock_event_device *evtdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) enum tick_device_mode mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) enum tick_nohz_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) NOHZ_MODE_INACTIVE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) NOHZ_MODE_LOWRES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) NOHZ_MODE_HIGHRES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * struct tick_sched - sched tick emulation and no idle tick control/stats
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * @sched_timer: hrtimer to schedule the periodic tick in high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * resolution mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * @check_clocks: Notification mechanism about clocksource changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * @nohz_mode: Mode - one state of tick_nohz_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * @inidle: Indicator that the CPU is in the tick idle mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * @tick_stopped: Indicator that the idle tick has been stopped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * @idle_active: Indicator that the CPU is actively in the tick idle mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * it is resetted during irq handling phases.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * @do_timer_lst: CPU was the last one doing do_timer before going idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * @got_idle_tick: Tick timer function has run with @inidle set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * @last_tick: Store the last tick expiry time when the tick
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * timer is modified for nohz sleeps. This is necessary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * to resume the tick timer operation in the timeline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * when the CPU returns from nohz sleep.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @next_tick: Next tick to be fired when in dynticks mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @idle_jiffies: jiffies at the entry to idle for idle time accounting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * @idle_calls: Total number of idle calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * @idle_sleeps: Number of idle calls, where the sched tick was stopped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * @idle_entrytime: Time when the idle call was entered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * @idle_waketime: Time when the idle was interrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * @idle_exittime: Time when the idle state was left
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * @idle_sleeptime: Sum of the time slept in idle with sched tick stopped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * @iowait_sleeptime: Sum of the time slept in idle with sched tick stopped, with IO outstanding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * @timer_expires: Anticipated timer expiration time (in case sched tick is stopped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * @timer_expires_base: Base time clock monotonic for @timer_expires
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * @next_timer: Expiry time of next expiring timer for debugging purpose only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * @tick_dep_mask: Tick dependency mask - is set, if someone needs the tick
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct tick_sched {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct hrtimer sched_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) unsigned long check_clocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) enum tick_nohz_mode nohz_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned int inidle : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned int tick_stopped : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) unsigned int idle_active : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) unsigned int do_timer_last : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) unsigned int got_idle_tick : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) ktime_t last_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ktime_t next_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) unsigned long idle_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) unsigned long idle_calls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) unsigned long idle_sleeps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) ktime_t idle_entrytime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) ktime_t idle_waketime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ktime_t idle_exittime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) ktime_t idle_sleeptime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ktime_t iowait_sleeptime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) unsigned long last_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) u64 timer_expires;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u64 timer_expires_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) u64 next_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ktime_t idle_expires;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) atomic_t tick_dep_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) extern struct tick_sched *tick_get_tick_sched(int cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) extern void tick_setup_sched_timer(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) extern void tick_cancel_sched_timer(int cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline void tick_cancel_sched_timer(int cpu) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) extern int __tick_broadcast_oneshot_control(enum tick_broadcast_state state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) __tick_broadcast_oneshot_control(enum tick_broadcast_state state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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