summaryrefslogtreecommitdiffstats
path: root/include/linux/timekeeping.h
blob: ba0ae09cbb21f2038c71104a435f6782f70c1668 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
#ifndef _LINUX_TIMEKEEPING_H
#define _LINUX_TIMEKEEPING_H

/* Included from linux/ktime.h */

void timekeeping_init(void);
extern int timekeeping_suspended;

/*
 * Get and set timeofday
 */
extern void do_gettimeofday(struct timeval *tv);
extern int do_settimeofday64(const struct timespec64 *ts);
extern int do_sys_settimeofday(const struct timespec *tv,
			       const struct timezone *tz);

/*
 * Kernel time accessors
 */
unsigned long get_seconds(void);
struct timespec64 current_kernel_time64(void);
/* does not take xtime_lock */
struct timespec __current_kernel_time(void);

static inline struct timespec current_kernel_time(void)
{
	struct timespec64 now = current_kernel_time64();

	return timespec64_to_timespec(now);
}

/*
 * timespec based interfaces
 */
struct timespec64 get_monotonic_coarse64(void);
extern void getrawmonotonic64(struct timespec64 *ts);
extern void ktime_get_ts64(struct timespec64 *ts);
extern time64_t ktime_get_seconds(void);
extern time64_t ktime_get_real_seconds(void);

extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);
extern void getboottime64(struct timespec64 *ts);

#if BITS_PER_LONG == 64
/**
 * Deprecated. Use do_settimeofday64().
 */
static inline int do_settimeofday(const struct timespec *ts)
{
	return do_settimeofday64(ts);
}

static inline int __getnstimeofday(struct timespec *ts)
{
	return __getnstimeofday64(ts);
}

static inline void getnstimeofday(struct timespec *ts)
{
	getnstimeofday64(ts);
}

static inline void ktime_get_ts(struct timespec *ts)
{
	ktime_get_ts64(ts);
}

static inline void ktime_get_real_ts(struct timespec *ts)
{
	getnstimeofday64(ts);
}

static inline void getrawmonotonic(struct timespec *ts)
{
	getrawmonotonic64(ts);
}

static inline struct timespec get_monotonic_coarse(void)
{
	return get_monotonic_coarse64();
}

static inline void getboottime(struct timespec *ts)
{
	return getboottime64(ts);
}
#else
/**
 * Deprecated. Use do_settimeofday64().
 */
static inline int do_settimeofday(const struct timespec *ts)
{
	struct timespec64 ts64;

	ts64 = timespec_to_timespec64(*ts);
	return do_settimeofday64(&ts64);
}

static inline int __getnstimeofday(struct timespec *ts)
{
	struct timespec64 ts64;
	int ret = __getnstimeofday64(&ts64);

	*ts = timespec64_to_timespec(ts64);
	return ret;
}

static inline void getnstimeofday(struct timespec *ts)
{
	struct timespec64 ts64;

	getnstimeofday64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}

static inline void ktime_get_ts(struct timespec *ts)
{
	struct timespec64 ts64;

	ktime_get_ts64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}

static inline void ktime_get_real_ts(struct timespec *ts)
{
	struct timespec64 ts64;

	getnstimeofday64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}

static inline void getrawmonotonic(struct timespec *ts)
{
	struct timespec64 ts64;

	getrawmonotonic64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}

static inline struct timespec get_monotonic_coarse(void)
{
	return timespec64_to_timespec(get_monotonic_coarse64());
}

static inline void getboottime(struct timespec *ts)
{
	struct timespec64 ts64;

	getboottime64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}
#endif

#define ktime_get_real_ts64(ts)	getnstimeofday64(ts)

/*
 * ktime_t based interfaces
 */

enum tk_offsets {
	TK_OFFS_REAL,
	TK_OFFS_BOOT,
	TK_OFFS_TAI,
	TK_OFFS_MAX,
};

extern ktime_t ktime_get(void);
extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
extern ktime_t ktime_get_raw(void);
extern u32 ktime_get_resolution_ns(void);

/**
 * ktime_get_real - get the real (wall-) time in ktime_t format
 */
static inline ktime_t ktime_get_real(void)
{
	return ktime_get_with_offset(TK_OFFS_REAL);
}

/**
 * ktime_get_boottime - Returns monotonic time since boot in ktime_t format
 *
 * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the
 * time spent in suspend.
 */
static inline ktime_t ktime_get_boottime(void)
{
	return ktime_get_with_offset(TK_OFFS_BOOT);
}

/**
 * ktime_get_clocktai - Returns the TAI time of day in ktime_t format
 */
static inline ktime_t ktime_get_clocktai(void)
{
	return ktime_get_with_offset(TK_OFFS_TAI);
}

/**
 * ktime_mono_to_real - Convert monotonic time to clock realtime
 */
static inline ktime_t ktime_mono_to_real(ktime_t mono)
{
	return ktime_mono_to_any(mono, TK_OFFS_REAL);
}

static inline u64 ktime_get_ns(void)
{
	return ktime_to_ns(ktime_get());
}

static inline u64 ktime_get_real_ns(void)
{
	return ktime_to_ns(ktime_get_real());
}

static inline u64 ktime_get_boot_ns(void)
{
	return ktime_to_ns(ktime_get_boottime());
}

static inline u64 ktime_get_tai_ns(void)
{
	return ktime_to_ns(ktime_get_clocktai());
}

static inline u64 ktime_get_raw_ns(void)
{
	return ktime_to_ns(ktime_get_raw());
}

extern u64 ktime_get_mono_fast_ns(void);
extern u64 ktime_get_raw_fast_ns(void);

/*
 * Timespec interfaces utilizing the ktime based ones
 */
static inline void get_monotonic_boottime(struct timespec *ts)
{
	*ts = ktime_to_timespec(ktime_get_boottime());
}

static inline void get_monotonic_boottime64(struct timespec64 *ts)
{
	*ts = ktime_to_timespec64(ktime_get_boottime());
}

static inline void timekeeping_clocktai(struct timespec *ts)
{
	*ts = ktime_to_timespec(ktime_get_clocktai());
}

/*
 * RTC specific
 */
extern bool timekeeping_rtc_skipsuspend(void);
extern bool timekeeping_rtc_skipresume(void);

extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);

/*
 * PPS accessor
 */
extern void getnstime_raw_and_real(struct timespec *ts_raw,
				   struct timespec *ts_real);

/*
 * Persistent clock related interfaces
 */
extern int persistent_clock_is_local;

extern void read_persistent_clock(struct timespec *ts);
extern void read_persistent_clock64(struct timespec64 *ts);
extern void read_boot_clock64(struct timespec64 *ts);
extern int update_persistent_clock(struct timespec now);
extern int update_persistent_clock64(struct timespec64 now);


#endif
OpenPOWER on IntegriCloud