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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 | */ | |
19 | extern void do_gettimeofday(struct timeval *tv); | |
21f7eca5 | 20 | extern int do_settimeofday64(const struct timespec64 *ts); |
86d34732 BW |
21 | extern int do_sys_settimeofday64(const struct timespec64 *tv, |
22 | const struct timezone *tz); | |
8b094cd0 TG |
23 | /* |
24 | * Kernel time accessors | |
25 | */ | |
26 | unsigned long get_seconds(void); | |
8758a240 | 27 | struct timespec64 current_kernel_time64(void); |
8b094cd0 TG |
28 | /* does not take xtime_lock */ |
29 | struct timespec __current_kernel_time(void); | |
30 | ||
8758a240 BW |
31 | static inline struct timespec current_kernel_time(void) |
32 | { | |
33 | struct timespec64 now = current_kernel_time64(); | |
34 | ||
35 | return timespec64_to_timespec(now); | |
36 | } | |
37 | ||
8b094cd0 TG |
38 | /* |
39 | * timespec based interfaces | |
40 | */ | |
334334b5 | 41 | struct timespec64 get_monotonic_coarse64(void); |
cdba2ec5 | 42 | extern void getrawmonotonic64(struct timespec64 *ts); |
d6d29896 | 43 | extern void ktime_get_ts64(struct timespec64 *ts); |
9e3680b1 | 44 | extern time64_t ktime_get_seconds(void); |
dbe7aa62 | 45 | extern time64_t ktime_get_real_seconds(void); |
d6d29896 TG |
46 | |
47 | extern int __getnstimeofday64(struct timespec64 *tv); | |
48 | extern void getnstimeofday64(struct timespec64 *tv); | |
d08c0cdd | 49 | extern void getboottime64(struct timespec64 *ts); |
d6d29896 TG |
50 | |
51 | #if BITS_PER_LONG == 64 | |
21f7eca5 | 52 | /** |
53 | * Deprecated. Use do_settimeofday64(). | |
54 | */ | |
55 | static inline int do_settimeofday(const struct timespec *ts) | |
56 | { | |
57 | return do_settimeofday64(ts); | |
58 | } | |
59 | ||
d6d29896 TG |
60 | static inline int __getnstimeofday(struct timespec *ts) |
61 | { | |
62 | return __getnstimeofday64(ts); | |
63 | } | |
64 | ||
65 | static inline void getnstimeofday(struct timespec *ts) | |
66 | { | |
67 | getnstimeofday64(ts); | |
68 | } | |
69 | ||
70 | static inline void ktime_get_ts(struct timespec *ts) | |
71 | { | |
72 | ktime_get_ts64(ts); | |
73 | } | |
74 | ||
75 | static inline void ktime_get_real_ts(struct timespec *ts) | |
76 | { | |
77 | getnstimeofday64(ts); | |
78 | } | |
79 | ||
cdba2ec5 JS |
80 | static inline void getrawmonotonic(struct timespec *ts) |
81 | { | |
82 | getrawmonotonic64(ts); | |
83 | } | |
84 | ||
334334b5 JS |
85 | static inline struct timespec get_monotonic_coarse(void) |
86 | { | |
87 | return get_monotonic_coarse64(); | |
88 | } | |
d08c0cdd JS |
89 | |
90 | static inline void getboottime(struct timespec *ts) | |
91 | { | |
92 | return getboottime64(ts); | |
93 | } | |
d6d29896 | 94 | #else |
21f7eca5 | 95 | /** |
96 | * Deprecated. Use do_settimeofday64(). | |
97 | */ | |
98 | static inline int do_settimeofday(const struct timespec *ts) | |
99 | { | |
100 | struct timespec64 ts64; | |
101 | ||
102 | ts64 = timespec_to_timespec64(*ts); | |
103 | return do_settimeofday64(&ts64); | |
104 | } | |
105 | ||
d6d29896 TG |
106 | static inline int __getnstimeofday(struct timespec *ts) |
107 | { | |
108 | struct timespec64 ts64; | |
109 | int ret = __getnstimeofday64(&ts64); | |
110 | ||
111 | *ts = timespec64_to_timespec(ts64); | |
112 | return ret; | |
113 | } | |
114 | ||
115 | static inline void getnstimeofday(struct timespec *ts) | |
116 | { | |
117 | struct timespec64 ts64; | |
118 | ||
119 | getnstimeofday64(&ts64); | |
120 | *ts = timespec64_to_timespec(ts64); | |
121 | } | |
122 | ||
123 | static inline void ktime_get_ts(struct timespec *ts) | |
124 | { | |
125 | struct timespec64 ts64; | |
126 | ||
127 | ktime_get_ts64(&ts64); | |
128 | *ts = timespec64_to_timespec(ts64); | |
129 | } | |
130 | ||
131 | static inline void ktime_get_real_ts(struct timespec *ts) | |
132 | { | |
133 | struct timespec64 ts64; | |
134 | ||
135 | getnstimeofday64(&ts64); | |
136 | *ts = timespec64_to_timespec(ts64); | |
137 | } | |
cdba2ec5 JS |
138 | |
139 | static inline void getrawmonotonic(struct timespec *ts) | |
140 | { | |
141 | struct timespec64 ts64; | |
142 | ||
143 | getrawmonotonic64(&ts64); | |
144 | *ts = timespec64_to_timespec(ts64); | |
145 | } | |
334334b5 JS |
146 | |
147 | static inline struct timespec get_monotonic_coarse(void) | |
148 | { | |
149 | return timespec64_to_timespec(get_monotonic_coarse64()); | |
150 | } | |
8b094cd0 | 151 | |
d08c0cdd JS |
152 | static inline void getboottime(struct timespec *ts) |
153 | { | |
154 | struct timespec64 ts64; | |
155 | ||
156 | getboottime64(&ts64); | |
157 | *ts = timespec64_to_timespec(ts64); | |
158 | } | |
159 | #endif | |
8b094cd0 | 160 | |
d6d29896 | 161 | #define ktime_get_real_ts64(ts) getnstimeofday64(ts) |
8b094cd0 TG |
162 | |
163 | /* | |
164 | * ktime_t based interfaces | |
165 | */ | |
0077dc60 TG |
166 | |
167 | enum tk_offsets { | |
168 | TK_OFFS_REAL, | |
169 | TK_OFFS_BOOT, | |
170 | TK_OFFS_TAI, | |
171 | TK_OFFS_MAX, | |
172 | }; | |
173 | ||
8b094cd0 | 174 | extern ktime_t ktime_get(void); |
0077dc60 | 175 | extern ktime_t ktime_get_with_offset(enum tk_offsets offs); |
9a6b5197 | 176 | extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); |
f519b1a2 | 177 | extern ktime_t ktime_get_raw(void); |
6374f912 | 178 | extern u32 ktime_get_resolution_ns(void); |
8b094cd0 | 179 | |
f5264d5d TG |
180 | /** |
181 | * ktime_get_real - get the real (wall-) time in ktime_t format | |
182 | */ | |
183 | static inline ktime_t ktime_get_real(void) | |
184 | { | |
185 | return ktime_get_with_offset(TK_OFFS_REAL); | |
186 | } | |
187 | ||
b82c817e TG |
188 | /** |
189 | * ktime_get_boottime - Returns monotonic time since boot in ktime_t format | |
190 | * | |
191 | * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the | |
192 | * time spent in suspend. | |
193 | */ | |
194 | static inline ktime_t ktime_get_boottime(void) | |
195 | { | |
196 | return ktime_get_with_offset(TK_OFFS_BOOT); | |
197 | } | |
198 | ||
afab07c0 TG |
199 | /** |
200 | * ktime_get_clocktai - Returns the TAI time of day in ktime_t format | |
201 | */ | |
202 | static inline ktime_t ktime_get_clocktai(void) | |
203 | { | |
204 | return ktime_get_with_offset(TK_OFFS_TAI); | |
205 | } | |
206 | ||
9a6b5197 TG |
207 | /** |
208 | * ktime_mono_to_real - Convert monotonic time to clock realtime | |
209 | */ | |
210 | static inline ktime_t ktime_mono_to_real(ktime_t mono) | |
211 | { | |
212 | return ktime_mono_to_any(mono, TK_OFFS_REAL); | |
213 | } | |
214 | ||
897994e3 TG |
215 | static inline u64 ktime_get_ns(void) |
216 | { | |
217 | return ktime_to_ns(ktime_get()); | |
218 | } | |
219 | ||
220 | static inline u64 ktime_get_real_ns(void) | |
221 | { | |
222 | return ktime_to_ns(ktime_get_real()); | |
223 | } | |
224 | ||
225 | static inline u64 ktime_get_boot_ns(void) | |
226 | { | |
227 | return ktime_to_ns(ktime_get_boottime()); | |
228 | } | |
229 | ||
fe5fba05 PZ |
230 | static inline u64 ktime_get_tai_ns(void) |
231 | { | |
232 | return ktime_to_ns(ktime_get_clocktai()); | |
233 | } | |
234 | ||
f519b1a2 TG |
235 | static inline u64 ktime_get_raw_ns(void) |
236 | { | |
237 | return ktime_to_ns(ktime_get_raw()); | |
238 | } | |
239 | ||
4396e058 | 240 | extern u64 ktime_get_mono_fast_ns(void); |
f09cb9a1 | 241 | extern u64 ktime_get_raw_fast_ns(void); |
948a5312 | 242 | extern u64 ktime_get_boot_fast_ns(void); |
4396e058 | 243 | |
48f18fd6 TG |
244 | /* |
245 | * Timespec interfaces utilizing the ktime based ones | |
246 | */ | |
247 | static inline void get_monotonic_boottime(struct timespec *ts) | |
248 | { | |
249 | *ts = ktime_to_timespec(ktime_get_boottime()); | |
250 | } | |
251 | ||
2e0c78ee JS |
252 | static inline void get_monotonic_boottime64(struct timespec64 *ts) |
253 | { | |
254 | *ts = ktime_to_timespec64(ktime_get_boottime()); | |
255 | } | |
256 | ||
61edec81 TG |
257 | static inline void timekeeping_clocktai(struct timespec *ts) |
258 | { | |
259 | *ts = ktime_to_timespec(ktime_get_clocktai()); | |
260 | } | |
261 | ||
3c9c12f4 DD |
262 | static inline void timekeeping_clocktai64(struct timespec64 *ts) |
263 | { | |
264 | *ts = ktime_to_timespec64(ktime_get_clocktai()); | |
265 | } | |
266 | ||
8b094cd0 TG |
267 | /* |
268 | * RTC specific | |
269 | */ | |
0fa88cb4 XP |
270 | extern bool timekeeping_rtc_skipsuspend(void); |
271 | extern bool timekeeping_rtc_skipresume(void); | |
272 | ||
04d90890 | 273 | extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); |
274 | ||
8b094cd0 TG |
275 | /* |
276 | * PPS accessor | |
277 | */ | |
071eee45 AB |
278 | extern void ktime_get_raw_and_real_ts64(struct timespec64 *ts_raw, |
279 | struct timespec64 *ts_real); | |
8b094cd0 | 280 | |
9da0f49c CH |
281 | /* |
282 | * struct system_time_snapshot - simultaneous raw/real time capture with | |
283 | * counter value | |
284 | * @cycles: Clocksource counter value to produce the system times | |
285 | * @real: Realtime system time | |
286 | * @raw: Monotonic raw system time | |
2c756feb CH |
287 | * @clock_was_set_seq: The sequence number of clock was set events |
288 | * @cs_was_changed_seq: The sequence number of clocksource change events | |
9da0f49c CH |
289 | */ |
290 | struct system_time_snapshot { | |
a5a1d1c2 | 291 | u64 cycles; |
9da0f49c CH |
292 | ktime_t real; |
293 | ktime_t raw; | |
2c756feb CH |
294 | unsigned int clock_was_set_seq; |
295 | u8 cs_was_changed_seq; | |
9da0f49c CH |
296 | }; |
297 | ||
8006c245 CH |
298 | /* |
299 | * struct system_device_crosststamp - system/device cross-timestamp | |
300 | * (syncronized capture) | |
301 | * @device: Device time | |
302 | * @sys_realtime: Realtime simultaneous with device time | |
303 | * @sys_monoraw: Monotonic raw simultaneous with device time | |
304 | */ | |
305 | struct system_device_crosststamp { | |
306 | ktime_t device; | |
307 | ktime_t sys_realtime; | |
308 | ktime_t sys_monoraw; | |
309 | }; | |
310 | ||
311 | /* | |
312 | * struct system_counterval_t - system counter value with the pointer to the | |
313 | * corresponding clocksource | |
314 | * @cycles: System counter value | |
315 | * @cs: Clocksource corresponding to system counter value. Used by | |
316 | * timekeeping code to verify comparibility of two cycle values | |
317 | */ | |
318 | struct system_counterval_t { | |
a5a1d1c2 | 319 | u64 cycles; |
8006c245 CH |
320 | struct clocksource *cs; |
321 | }; | |
322 | ||
323 | /* | |
324 | * Get cross timestamp between system clock and device clock | |
325 | */ | |
326 | extern int get_device_system_crosststamp( | |
327 | int (*get_time_fn)(ktime_t *device_time, | |
328 | struct system_counterval_t *system_counterval, | |
329 | void *ctx), | |
330 | void *ctx, | |
2c756feb | 331 | struct system_time_snapshot *history, |
8006c245 CH |
332 | struct system_device_crosststamp *xtstamp); |
333 | ||
9da0f49c CH |
334 | /* |
335 | * Simultaneously snapshot realtime and monotonic raw clocks | |
336 | */ | |
337 | extern void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot); | |
338 | ||
8b094cd0 TG |
339 | /* |
340 | * Persistent clock related interfaces | |
341 | */ | |
8b094cd0 TG |
342 | extern int persistent_clock_is_local; |
343 | ||
8b094cd0 | 344 | extern void read_persistent_clock(struct timespec *ts); |
2ee96632 | 345 | extern void read_persistent_clock64(struct timespec64 *ts); |
9a806ddb | 346 | extern void read_boot_clock64(struct timespec64 *ts); |
8b094cd0 | 347 | extern int update_persistent_clock(struct timespec now); |
3c00a1fe | 348 | extern int update_persistent_clock64(struct timespec64 now); |
8b094cd0 TG |
349 | |
350 | ||
351 | #endif |