Commit | Line | Data |
---|---|---|
f8381cba TG |
1 | /* |
2 | * tick internal variable and functions used by low/high res code | |
3 | */ | |
e2830b5c TH |
4 | #include <linux/hrtimer.h> |
5 | #include <linux/tick.h> | |
6441402b | 6 | |
8b094cd0 | 7 | #include "timekeeping.h" |
c1797baf | 8 | #include "tick-sched.h" |
8b094cd0 | 9 | |
9f083b74 | 10 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
6441402b TG |
11 | |
12 | #define TICK_DO_TIMER_NONE -1 | |
13 | #define TICK_DO_TIMER_BOOT -2 | |
14 | ||
f8381cba | 15 | DECLARE_PER_CPU(struct tick_device, tick_cpu_device); |
f8381cba TG |
16 | extern ktime_t tick_next_period; |
17 | extern ktime_t tick_period; | |
d3ed7824 | 18 | extern int tick_do_timer_cpu __read_mostly; |
f8381cba TG |
19 | |
20 | extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); | |
21 | extern void tick_handle_periodic(struct clock_event_device *dev); | |
7172a286 | 22 | extern void tick_check_new_device(struct clock_event_device *dev); |
8c53daf6 TG |
23 | extern void tick_handover_do_timer(int *cpup); |
24 | extern void tick_shutdown(unsigned int *cpup); | |
25 | extern void tick_suspend(void); | |
f46481d0 | 26 | extern void tick_resume(void); |
03e13cf5 TG |
27 | extern bool tick_check_replacement(struct clock_event_device *curdev, |
28 | struct clock_event_device *newdev); | |
29 | extern void tick_install_replacement(struct clock_event_device *dev); | |
c1797baf | 30 | extern int tick_is_oneshot_available(void); |
7270d11c | 31 | extern struct tick_device *tick_get_device(int cpu); |
f8381cba | 32 | |
554ef387 | 33 | extern int clockevents_tick_resume(struct clock_event_device *dev); |
b7475eb5 TG |
34 | /* Check, if the device is functional or a dummy for broadcast */ |
35 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
36 | { | |
37 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
38 | } | |
2344abbc | 39 | |
b7475eb5 | 40 | extern void clockevents_shutdown(struct clock_event_device *dev); |
c1797baf TG |
41 | extern void clockevents_exchange_device(struct clock_event_device *old, |
42 | struct clock_event_device *new); | |
7270d11c TG |
43 | extern void clockevents_set_state(struct clock_event_device *dev, |
44 | enum clock_event_state state); | |
45 | extern int clockevents_program_event(struct clock_event_device *dev, | |
46 | ktime_t expires, bool force); | |
c1797baf | 47 | extern void clockevents_handle_noop(struct clock_event_device *dev); |
b7475eb5 | 48 | extern int __clockevents_update_freq(struct clock_event_device *dev, u32 freq); |
891292a7 | 49 | extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt); |
4ffee521 TG |
50 | #else |
51 | static inline void tick_suspend(void) { } | |
f46481d0 | 52 | static inline void tick_resume(void) { } |
b7475eb5 | 53 | #endif /* GENERIC_CLOCKEVENTS */ |
03e13cf5 | 54 | |
b7475eb5 | 55 | /* Oneshot related functions */ |
79bf2bb3 TG |
56 | #ifdef CONFIG_TICK_ONESHOT |
57 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
58 | void (*handler)(struct clock_event_device *), | |
59 | ktime_t nextevt); | |
60 | extern int tick_program_event(ktime_t expires, int force); | |
61 | extern void tick_oneshot_notify(void); | |
62 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
cd05a1f8 | 63 | extern void tick_resume_oneshot(void); |
b7475eb5 | 64 | static inline bool tick_oneshot_possible(void) { return true; } |
c1797baf TG |
65 | extern int tick_oneshot_mode_active(void); |
66 | extern void tick_clock_notify(void); | |
67 | extern int tick_check_oneshot_change(int allow_nohz); | |
68 | extern int tick_init_highres(void); | |
79bf2bb3 TG |
69 | #else /* !ONESHOT */ |
70 | static inline | |
71 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
72 | void (*handler)(struct clock_event_device *), | |
b7475eb5 TG |
73 | ktime_t nextevt) { BUG(); } |
74 | static inline void tick_resume_oneshot(void) { BUG(); } | |
75 | static inline int tick_program_event(ktime_t expires, int force) { return 0; } | |
79bf2bb3 | 76 | static inline void tick_oneshot_notify(void) { } |
b7475eb5 | 77 | static inline bool tick_oneshot_possible(void) { return false; } |
c1797baf TG |
78 | static inline int tick_oneshot_mode_active(void) { return 0; } |
79 | static inline void tick_clock_notify(void) { } | |
80 | static inline int tick_check_oneshot_change(int allow_nohz) { return 0; } | |
79bf2bb3 TG |
81 | #endif /* !TICK_ONESHOT */ |
82 | ||
b7475eb5 | 83 | /* Broadcasting support */ |
f8381cba | 84 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
f8381cba | 85 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
7172a286 | 86 | extern void tick_install_broadcast_device(struct clock_event_device *dev); |
f8381cba TG |
87 | extern int tick_is_broadcast_device(struct clock_event_device *dev); |
88 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
89 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
6321dd60 | 90 | extern void tick_suspend_broadcast(void); |
f46481d0 TG |
91 | extern void tick_resume_broadcast(void); |
92 | extern bool tick_resume_check_broadcast(void); | |
b352bc1c | 93 | extern void tick_broadcast_init(void); |
b7475eb5 TG |
94 | extern void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); |
95 | extern int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq); | |
c1797baf TG |
96 | extern struct tick_device *tick_get_broadcast_device(void); |
97 | extern struct cpumask *tick_get_broadcast_mask(void); | |
f8381cba | 98 | #else /* !BROADCAST */ |
b7475eb5 TG |
99 | static inline void tick_install_broadcast_device(struct clock_event_device *dev) { } |
100 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) { return 0; } | |
101 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu) { return 0; } | |
f8381cba TG |
102 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } |
103 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
104 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
6321dd60 | 105 | static inline void tick_suspend_broadcast(void) { } |
f46481d0 TG |
106 | static inline void tick_resume_broadcast(void) { } |
107 | static inline bool tick_resume_check_broadcast(void) { return false; } | |
b352bc1c | 108 | static inline void tick_broadcast_init(void) { } |
b7475eb5 | 109 | static inline int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq) { return -ENODEV; } |
f8381cba | 110 | |
b7475eb5 TG |
111 | /* Set the periodic handler in non broadcast mode */ |
112 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast) | |
f8381cba TG |
113 | { |
114 | dev->event_handler = tick_handle_periodic; | |
115 | } | |
116 | #endif /* !BROADCAST */ | |
117 | ||
b7475eb5 TG |
118 | /* Functions related to oneshot broadcasting */ |
119 | #if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) | |
120 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
121 | extern int tick_broadcast_oneshot_control(unsigned long reason); | |
122 | extern void tick_broadcast_switch_to_oneshot(void); | |
123 | extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); | |
b7475eb5 TG |
124 | extern int tick_broadcast_oneshot_active(void); |
125 | extern void tick_check_oneshot_broadcast_this_cpu(void); | |
126 | bool tick_broadcast_oneshot_available(void); | |
c1797baf | 127 | extern struct cpumask *tick_get_broadcast_oneshot_mask(void); |
b7475eb5 TG |
128 | #else /* BROADCAST && ONESHOT */ |
129 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { BUG(); } | |
130 | static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; } | |
131 | static inline void tick_broadcast_switch_to_oneshot(void) { } | |
132 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
b7475eb5 TG |
133 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
134 | static inline void tick_check_oneshot_broadcast_this_cpu(void) { } | |
135 | static inline bool tick_broadcast_oneshot_available(void) { return tick_oneshot_possible(); } | |
136 | #endif /* !BROADCAST && ONESHOT */ | |
7cf37e87 | 137 | |
b7475eb5 TG |
138 | /* NO_HZ_FULL internal */ |
139 | #ifdef CONFIG_NO_HZ_FULL | |
140 | extern void tick_nohz_init(void); | |
141 | # else | |
142 | static inline void tick_nohz_init(void) { } | |
143 | #endif |