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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8b094cd0 TG |
2 | #ifndef _LINUX_TIMEKEEPING_H |
3 | #define _LINUX_TIMEKEEPING_H | |
4 | ||
b536fd58 | 5 | #include <linux/errno.h> |
86d34732 | 6 | |
8b094cd0 TG |
7 | /* Included from linux/ktime.h */ |
8 | ||
9 | void timekeeping_init(void); | |
10 | extern int timekeeping_suspended; | |
11 | ||
93b5a9a7 IM |
12 | /* Architecture timer tick functions: */ |
13 | extern void update_process_times(int user); | |
14 | extern void xtime_update(unsigned long ticks); | |
15 | ||
8b094cd0 TG |
16 | /* |
17 | * Get and set timeofday | |
18 | */ | |
21f7eca5 | 19 | extern int do_settimeofday64(const struct timespec64 *ts); |
86d34732 BW |
20 | extern int do_sys_settimeofday64(const struct timespec64 *tv, |
21 | const struct timezone *tz); | |
8b094cd0 TG |
22 | /* |
23 | * Kernel time accessors | |
24 | */ | |
8758a240 | 25 | struct timespec64 current_kernel_time64(void); |
8758a240 | 26 | |
8b094cd0 | 27 | /* |
6546911e | 28 | * timespec64 based interfaces |
8b094cd0 | 29 | */ |
334334b5 | 30 | struct timespec64 get_monotonic_coarse64(void); |
cdba2ec5 | 31 | extern void getrawmonotonic64(struct timespec64 *ts); |
d6d29896 | 32 | extern void ktime_get_ts64(struct timespec64 *ts); |
9e3680b1 | 33 | extern time64_t ktime_get_seconds(void); |
6909e29f | 34 | extern time64_t __ktime_get_real_seconds(void); |
dbe7aa62 | 35 | extern time64_t ktime_get_real_seconds(void); |
72199320 | 36 | extern void ktime_get_active_ts64(struct timespec64 *ts); |
d6d29896 TG |
37 | |
38 | extern int __getnstimeofday64(struct timespec64 *tv); | |
39 | extern void getnstimeofday64(struct timespec64 *tv); | |
d08c0cdd | 40 | extern void getboottime64(struct timespec64 *ts); |
d6d29896 | 41 | |
d6c7270e TG |
42 | #define ktime_get_real_ts64(ts) getnstimeofday64(ts) |
43 | ||
44 | /* Clock BOOTTIME compatibility wrappers */ | |
45 | static inline void get_monotonic_boottime64(struct timespec64 *ts) | |
46 | { | |
47 | ktime_get_ts64(ts); | |
48 | } | |
8b094cd0 TG |
49 | |
50 | /* | |
51 | * ktime_t based interfaces | |
52 | */ | |
0077dc60 TG |
53 | enum tk_offsets { |
54 | TK_OFFS_REAL, | |
0077dc60 TG |
55 | TK_OFFS_TAI, |
56 | TK_OFFS_MAX, | |
57 | }; | |
58 | ||
8b094cd0 | 59 | extern ktime_t ktime_get(void); |
0077dc60 | 60 | extern ktime_t ktime_get_with_offset(enum tk_offsets offs); |
9a6b5197 | 61 | extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); |
f519b1a2 | 62 | extern ktime_t ktime_get_raw(void); |
6374f912 | 63 | extern u32 ktime_get_resolution_ns(void); |
8b094cd0 | 64 | |
d6c7270e TG |
65 | /* Clock BOOTTIME compatibility wrappers */ |
66 | static inline ktime_t ktime_get_boottime(void) { return ktime_get(); } | |
67 | static inline u64 ktime_get_boot_ns(void) { return ktime_get(); } | |
68 | ||
f5264d5d TG |
69 | /** |
70 | * ktime_get_real - get the real (wall-) time in ktime_t format | |
71 | */ | |
72 | static inline ktime_t ktime_get_real(void) | |
73 | { | |
74 | return ktime_get_with_offset(TK_OFFS_REAL); | |
75 | } | |
76 | ||
afab07c0 TG |
77 | /** |
78 | * ktime_get_clocktai - Returns the TAI time of day in ktime_t format | |
79 | */ | |
80 | static inline ktime_t ktime_get_clocktai(void) | |
81 | { | |
82 | return ktime_get_with_offset(TK_OFFS_TAI); | |
83 | } | |
84 | ||
9a6b5197 TG |
85 | /** |
86 | * ktime_mono_to_real - Convert monotonic time to clock realtime | |
87 | */ | |
88 | static inline ktime_t ktime_mono_to_real(ktime_t mono) | |
89 | { | |
90 | return ktime_mono_to_any(mono, TK_OFFS_REAL); | |
91 | } | |
92 | ||
897994e3 TG |
93 | static inline u64 ktime_get_ns(void) |
94 | { | |
95 | return ktime_to_ns(ktime_get()); | |
96 | } | |
97 | ||
98 | static inline u64 ktime_get_real_ns(void) | |
99 | { | |
100 | return ktime_to_ns(ktime_get_real()); | |
101 | } | |
102 | ||
fe5fba05 PZ |
103 | static inline u64 ktime_get_tai_ns(void) |
104 | { | |
105 | return ktime_to_ns(ktime_get_clocktai()); | |
106 | } | |
107 | ||
f519b1a2 TG |
108 | static inline u64 ktime_get_raw_ns(void) |
109 | { | |
110 | return ktime_to_ns(ktime_get_raw()); | |
111 | } | |
112 | ||
4396e058 | 113 | extern u64 ktime_get_mono_fast_ns(void); |
f09cb9a1 | 114 | extern u64 ktime_get_raw_fast_ns(void); |
4c3711d7 | 115 | extern u64 ktime_get_real_fast_ns(void); |
4396e058 | 116 | |
d6c7270e TG |
117 | /* |
118 | * timespec64 interfaces utilizing the ktime based ones | |
119 | */ | |
3c9c12f4 DD |
120 | static inline void timekeeping_clocktai64(struct timespec64 *ts) |
121 | { | |
122 | *ts = ktime_to_timespec64(ktime_get_clocktai()); | |
123 | } | |
124 | ||
8b094cd0 TG |
125 | /* |
126 | * RTC specific | |
127 | */ | |
0fa88cb4 XP |
128 | extern bool timekeeping_rtc_skipsuspend(void); |
129 | extern bool timekeeping_rtc_skipresume(void); | |
130 | ||
04d90890 | 131 | extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); |
132 | ||
9da0f49c CH |
133 | /* |
134 | * struct system_time_snapshot - simultaneous raw/real time capture with | |
135 | * counter value | |
136 | * @cycles: Clocksource counter value to produce the system times | |
137 | * @real: Realtime system time | |
138 | * @raw: Monotonic raw system time | |
2c756feb CH |
139 | * @clock_was_set_seq: The sequence number of clock was set events |
140 | * @cs_was_changed_seq: The sequence number of clocksource change events | |
9da0f49c CH |
141 | */ |
142 | struct system_time_snapshot { | |
a5a1d1c2 | 143 | u64 cycles; |
9da0f49c CH |
144 | ktime_t real; |
145 | ktime_t raw; | |
2c756feb CH |
146 | unsigned int clock_was_set_seq; |
147 | u8 cs_was_changed_seq; | |
9da0f49c CH |
148 | }; |
149 | ||
8006c245 CH |
150 | /* |
151 | * struct system_device_crosststamp - system/device cross-timestamp | |
152 | * (syncronized capture) | |
153 | * @device: Device time | |
154 | * @sys_realtime: Realtime simultaneous with device time | |
155 | * @sys_monoraw: Monotonic raw simultaneous with device time | |
156 | */ | |
157 | struct system_device_crosststamp { | |
158 | ktime_t device; | |
159 | ktime_t sys_realtime; | |
160 | ktime_t sys_monoraw; | |
161 | }; | |
162 | ||
163 | /* | |
164 | * struct system_counterval_t - system counter value with the pointer to the | |
165 | * corresponding clocksource | |
166 | * @cycles: System counter value | |
167 | * @cs: Clocksource corresponding to system counter value. Used by | |
168 | * timekeeping code to verify comparibility of two cycle values | |
169 | */ | |
170 | struct system_counterval_t { | |
a5a1d1c2 | 171 | u64 cycles; |
8006c245 CH |
172 | struct clocksource *cs; |
173 | }; | |
174 | ||
175 | /* | |
176 | * Get cross timestamp between system clock and device clock | |
177 | */ | |
178 | extern int get_device_system_crosststamp( | |
179 | int (*get_time_fn)(ktime_t *device_time, | |
180 | struct system_counterval_t *system_counterval, | |
181 | void *ctx), | |
182 | void *ctx, | |
2c756feb | 183 | struct system_time_snapshot *history, |
8006c245 CH |
184 | struct system_device_crosststamp *xtstamp); |
185 | ||
9da0f49c CH |
186 | /* |
187 | * Simultaneously snapshot realtime and monotonic raw clocks | |
188 | */ | |
189 | extern void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot); | |
190 | ||
8b094cd0 TG |
191 | /* |
192 | * Persistent clock related interfaces | |
193 | */ | |
8b094cd0 TG |
194 | extern int persistent_clock_is_local; |
195 | ||
2ee96632 | 196 | extern void read_persistent_clock64(struct timespec64 *ts); |
9a806ddb | 197 | extern void read_boot_clock64(struct timespec64 *ts); |
3c00a1fe | 198 | extern int update_persistent_clock64(struct timespec64 now); |
8b094cd0 TG |
199 | |
200 | ||
201 | #endif |