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Thomas Gleixner8b094cd2014-07-16 21:04:02 +00001#ifndef _LINUX_TIMEKEEPING_H
2#define _LINUX_TIMEKEEPING_H
3
4/* Included from linux/ktime.h */
5
6void timekeeping_init(void);
7extern int timekeeping_suspended;
8
9/*
10 * Get and set timeofday
11 */
12extern void do_gettimeofday(struct timeval *tv);
pang.xunlei21f7eca2014-11-18 19:15:16 +080013extern int do_settimeofday64(const struct timespec64 *ts);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +000014extern int do_sys_settimeofday(const struct timespec *tv,
15 const struct timezone *tz);
16
17/*
18 * Kernel time accessors
19 */
20unsigned long get_seconds(void);
Baolin Wang8758a242015-07-29 20:09:43 +080021struct timespec64 current_kernel_time64(void);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +000022/* does not take xtime_lock */
23struct timespec __current_kernel_time(void);
24
Baolin Wang8758a242015-07-29 20:09:43 +080025static inline struct timespec current_kernel_time(void)
26{
27 struct timespec64 now = current_kernel_time64();
28
29 return timespec64_to_timespec(now);
30}
31
Thomas Gleixner8b094cd2014-07-16 21:04:02 +000032/*
33 * timespec based interfaces
34 */
John Stultz334334b2014-11-07 11:20:40 -080035struct timespec64 get_monotonic_coarse64(void);
John Stultzcdba2ec2014-11-07 11:03:20 -080036extern void getrawmonotonic64(struct timespec64 *ts);
Thomas Gleixnerd6d29892014-07-16 21:04:04 +000037extern void ktime_get_ts64(struct timespec64 *ts);
Heena Sirwani9e3680b2014-10-29 16:01:16 +053038extern time64_t ktime_get_seconds(void);
Heena Sirwanidbe7aa62014-10-29 16:01:50 +053039extern time64_t ktime_get_real_seconds(void);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +000040
Thomas Gleixnerd6d29892014-07-16 21:04:04 +000041extern int __getnstimeofday64(struct timespec64 *tv);
42extern void getnstimeofday64(struct timespec64 *tv);
John Stultzd08c0cd2014-12-08 12:00:09 -080043extern void getboottime64(struct timespec64 *ts);
Thomas Gleixnerd6d29892014-07-16 21:04:04 +000044
45#if BITS_PER_LONG == 64
pang.xunlei21f7eca2014-11-18 19:15:16 +080046/**
47 * Deprecated. Use do_settimeofday64().
48 */
49static inline int do_settimeofday(const struct timespec *ts)
50{
51 return do_settimeofday64(ts);
52}
53
Thomas Gleixnerd6d29892014-07-16 21:04:04 +000054static inline int __getnstimeofday(struct timespec *ts)
55{
56 return __getnstimeofday64(ts);
57}
58
59static inline void getnstimeofday(struct timespec *ts)
60{
61 getnstimeofday64(ts);
62}
63
64static inline void ktime_get_ts(struct timespec *ts)
65{
66 ktime_get_ts64(ts);
67}
68
69static inline void ktime_get_real_ts(struct timespec *ts)
70{
71 getnstimeofday64(ts);
72}
73
John Stultzcdba2ec2014-11-07 11:03:20 -080074static inline void getrawmonotonic(struct timespec *ts)
75{
76 getrawmonotonic64(ts);
77}
78
John Stultz334334b2014-11-07 11:20:40 -080079static inline struct timespec get_monotonic_coarse(void)
80{
81 return get_monotonic_coarse64();
82}
John Stultzd08c0cd2014-12-08 12:00:09 -080083
84static inline void getboottime(struct timespec *ts)
85{
86 return getboottime64(ts);
87}
Thomas Gleixnerd6d29892014-07-16 21:04:04 +000088#else
pang.xunlei21f7eca2014-11-18 19:15:16 +080089/**
90 * Deprecated. Use do_settimeofday64().
91 */
92static inline int do_settimeofday(const struct timespec *ts)
93{
94 struct timespec64 ts64;
95
96 ts64 = timespec_to_timespec64(*ts);
97 return do_settimeofday64(&ts64);
98}
99
Thomas Gleixnerd6d29892014-07-16 21:04:04 +0000100static inline int __getnstimeofday(struct timespec *ts)
101{
102 struct timespec64 ts64;
103 int ret = __getnstimeofday64(&ts64);
104
105 *ts = timespec64_to_timespec(ts64);
106 return ret;
107}
108
109static inline void getnstimeofday(struct timespec *ts)
110{
111 struct timespec64 ts64;
112
113 getnstimeofday64(&ts64);
114 *ts = timespec64_to_timespec(ts64);
115}
116
117static inline void ktime_get_ts(struct timespec *ts)
118{
119 struct timespec64 ts64;
120
121 ktime_get_ts64(&ts64);
122 *ts = timespec64_to_timespec(ts64);
123}
124
125static inline void ktime_get_real_ts(struct timespec *ts)
126{
127 struct timespec64 ts64;
128
129 getnstimeofday64(&ts64);
130 *ts = timespec64_to_timespec(ts64);
131}
John Stultzcdba2ec2014-11-07 11:03:20 -0800132
133static inline void getrawmonotonic(struct timespec *ts)
134{
135 struct timespec64 ts64;
136
137 getrawmonotonic64(&ts64);
138 *ts = timespec64_to_timespec(ts64);
139}
John Stultz334334b2014-11-07 11:20:40 -0800140
141static inline struct timespec get_monotonic_coarse(void)
142{
143 return timespec64_to_timespec(get_monotonic_coarse64());
144}
Thomas Gleixnerd6d29892014-07-16 21:04:04 +0000145
John Stultzd08c0cd2014-12-08 12:00:09 -0800146static inline void getboottime(struct timespec *ts)
147{
148 struct timespec64 ts64;
149
150 getboottime64(&ts64);
151 *ts = timespec64_to_timespec(ts64);
152}
153#endif
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000154
Thomas Gleixnerd6d29892014-07-16 21:04:04 +0000155#define ktime_get_real_ts64(ts) getnstimeofday64(ts)
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000156
157/*
158 * ktime_t based interfaces
159 */
Thomas Gleixner0077dc62014-07-16 21:04:13 +0000160
161enum tk_offsets {
162 TK_OFFS_REAL,
163 TK_OFFS_BOOT,
164 TK_OFFS_TAI,
165 TK_OFFS_MAX,
166};
167
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000168extern ktime_t ktime_get(void);
Thomas Gleixner0077dc62014-07-16 21:04:13 +0000169extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
Thomas Gleixner9a6b5192014-07-16 21:04:22 +0000170extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
Thomas Gleixnerf519b1a2014-07-16 21:05:04 +0000171extern ktime_t ktime_get_raw(void);
Harald Geyer6374f912015-04-07 11:12:35 +0000172extern u32 ktime_get_resolution_ns(void);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000173
Thomas Gleixnerf5264d52014-07-16 21:04:14 +0000174/**
175 * ktime_get_real - get the real (wall-) time in ktime_t format
176 */
177static inline ktime_t ktime_get_real(void)
178{
179 return ktime_get_with_offset(TK_OFFS_REAL);
180}
181
Thomas Gleixnerb82c8172014-07-16 21:04:16 +0000182/**
183 * ktime_get_boottime - Returns monotonic time since boot in ktime_t format
184 *
185 * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the
186 * time spent in suspend.
187 */
188static inline ktime_t ktime_get_boottime(void)
189{
190 return ktime_get_with_offset(TK_OFFS_BOOT);
191}
192
Thomas Gleixnerafab07c2014-07-16 21:04:17 +0000193/**
194 * ktime_get_clocktai - Returns the TAI time of day in ktime_t format
195 */
196static inline ktime_t ktime_get_clocktai(void)
197{
198 return ktime_get_with_offset(TK_OFFS_TAI);
199}
200
Thomas Gleixner9a6b5192014-07-16 21:04:22 +0000201/**
202 * ktime_mono_to_real - Convert monotonic time to clock realtime
203 */
204static inline ktime_t ktime_mono_to_real(ktime_t mono)
205{
206 return ktime_mono_to_any(mono, TK_OFFS_REAL);
207}
208
Thomas Gleixner897994e2014-07-16 21:04:29 +0000209static inline u64 ktime_get_ns(void)
210{
211 return ktime_to_ns(ktime_get());
212}
213
214static inline u64 ktime_get_real_ns(void)
215{
216 return ktime_to_ns(ktime_get_real());
217}
218
219static inline u64 ktime_get_boot_ns(void)
220{
221 return ktime_to_ns(ktime_get_boottime());
222}
223
Peter Zijlstrafe5fba02015-03-17 12:39:10 +0100224static inline u64 ktime_get_tai_ns(void)
225{
226 return ktime_to_ns(ktime_get_clocktai());
227}
228
Thomas Gleixnerf519b1a2014-07-16 21:05:04 +0000229static inline u64 ktime_get_raw_ns(void)
230{
231 return ktime_to_ns(ktime_get_raw());
232}
233
Thomas Gleixner4396e052014-07-16 21:05:23 +0000234extern u64 ktime_get_mono_fast_ns(void);
Peter Zijlstraf09cb9a2015-03-19 09:39:08 +0100235extern u64 ktime_get_raw_fast_ns(void);
Thomas Gleixner4396e052014-07-16 21:05:23 +0000236
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000237/*
Thomas Gleixner48f18fd2014-07-16 21:04:57 +0000238 * Timespec interfaces utilizing the ktime based ones
239 */
240static inline void get_monotonic_boottime(struct timespec *ts)
241{
242 *ts = ktime_to_timespec(ktime_get_boottime());
243}
244
John Stultz2e0c78e2014-12-18 18:04:34 -0800245static inline void get_monotonic_boottime64(struct timespec64 *ts)
246{
247 *ts = ktime_to_timespec64(ktime_get_boottime());
248}
249
Thomas Gleixner61edec82014-07-16 21:05:01 +0000250static inline void timekeeping_clocktai(struct timespec *ts)
251{
252 *ts = ktime_to_timespec(ktime_get_clocktai());
253}
254
Thomas Gleixner48f18fd2014-07-16 21:04:57 +0000255/*
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000256 * RTC specific
257 */
Xunlei Pang0fa88cb2015-04-01 20:34:38 -0700258extern bool timekeeping_rtc_skipsuspend(void);
259extern bool timekeeping_rtc_skipresume(void);
260
pang.xunlei04d90892014-11-18 19:15:17 +0800261extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);
262
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000263/*
264 * PPS accessor
265 */
Arnd Bergmann071eee42015-09-28 22:21:29 +0200266extern void ktime_get_raw_and_real_ts64(struct timespec64 *ts_raw,
267 struct timespec64 *ts_real);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000268
269/*
270 * Persistent clock related interfaces
271 */
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000272extern int persistent_clock_is_local;
273
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000274extern void read_persistent_clock(struct timespec *ts);
Xunlei Pang2ee96632015-04-01 20:34:22 -0700275extern void read_persistent_clock64(struct timespec64 *ts);
Xunlei Pang9a806dd2015-04-01 20:34:21 -0700276extern void read_boot_clock64(struct timespec64 *ts);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000277extern int update_persistent_clock(struct timespec now);
Xunlei Pang3c00a1f2015-04-01 20:34:23 -0700278extern int update_persistent_clock64(struct timespec64 now);
Thomas Gleixner8b094cd2014-07-16 21:04:02 +0000279
280
281#endif