timekeeping.h 5.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12
#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);
13
extern int do_settimeofday64(const struct timespec64 *ts);
14 15 16 17 18 19 20 21 22 23 24 25 26 27
extern int do_sys_settimeofday(const struct timespec *tv,
			       const struct timezone *tz);

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

/*
 * timespec based interfaces
 */
28
struct timespec64 get_monotonic_coarse64(void);
29
extern void getrawmonotonic64(struct timespec64 *ts);
30
extern void ktime_get_ts64(struct timespec64 *ts);
31
extern time64_t ktime_get_seconds(void);
32
extern time64_t ktime_get_real_seconds(void);
33 34 35

extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);
36
extern void getboottime64(struct timespec64 *ts);
37 38

#if BITS_PER_LONG == 64
39 40 41 42 43 44 45 46
/**
 * Deprecated. Use do_settimeofday64().
 */
static inline int do_settimeofday(const struct timespec *ts)
{
	return do_settimeofday64(ts);
}

47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
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);
}

67 68 69 70 71
static inline void getrawmonotonic(struct timespec *ts)
{
	getrawmonotonic64(ts);
}

72 73 74 75
static inline struct timespec get_monotonic_coarse(void)
{
	return get_monotonic_coarse64();
}
76 77 78 79 80

static inline void getboottime(struct timespec *ts)
{
	return getboottime64(ts);
}
81
#else
82 83 84 85 86 87 88 89 90 91 92
/**
 * 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);
}

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
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);
}
125 126 127 128 129 130 131 132

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

	getrawmonotonic64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}
133 134 135 136 137

static inline struct timespec get_monotonic_coarse(void)
{
	return timespec64_to_timespec(get_monotonic_coarse64());
}
138

139 140 141 142 143 144 145 146
static inline void getboottime(struct timespec *ts)
{
	struct timespec64 ts64;

	getboottime64(&ts64);
	*ts = timespec64_to_timespec(ts64);
}
#endif
147 148

#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
149
#define ktime_get_real_ts64(ts)	getnstimeofday64(ts)
150 151 152 153

/*
 * ktime_t based interfaces
 */
154 155 156 157 158 159 160 161

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

162
extern ktime_t ktime_get(void);
163
extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
164
extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
165
extern ktime_t ktime_get_raw(void);
166

167 168 169 170 171 172 173 174
/**
 * 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);
}

175 176 177 178 179 180 181 182 183 184 185
/**
 * 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);
}

186 187 188 189 190 191 192 193
/**
 * 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);
}

194 195 196 197 198 199 200 201
/**
 * 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);
}

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
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());
}

P
Peter Zijlstra 已提交
217 218 219 220 221
static inline u64 ktime_get_tai_ns(void)
{
	return ktime_to_ns(ktime_get_clocktai());
}

222 223 224 225 226
static inline u64 ktime_get_raw_ns(void)
{
	return ktime_to_ns(ktime_get_raw());
}

227
extern u64 ktime_get_mono_fast_ns(void);
P
Peter Zijlstra 已提交
228
extern u64 ktime_get_raw_fast_ns(void);
229

230 231 232 233 234 235 236 237
/*
 * Timespec interfaces utilizing the ktime based ones
 */
static inline void get_monotonic_boottime(struct timespec *ts)
{
	*ts = ktime_to_timespec(ktime_get_boottime());
}

238 239 240 241 242
static inline void get_monotonic_boottime64(struct timespec64 *ts)
{
	*ts = ktime_to_timespec64(ktime_get_boottime());
}

243 244 245 246 247
static inline void timekeeping_clocktai(struct timespec *ts)
{
	*ts = ktime_to_timespec(ktime_get_clocktai());
}

248 249 250
/*
 * RTC specific
 */
251 252
extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);

253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270
/*
 * PPS accessor
 */
extern void getnstime_raw_and_real(struct timespec *ts_raw,
				   struct timespec *ts_real);

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

static inline bool has_persistent_clock(void)
{
	return persistent_clock_exist;
}

extern void read_persistent_clock(struct timespec *ts);
271
extern void read_persistent_clock64(struct timespec64 *ts);
272
extern void read_boot_clock(struct timespec *ts);
273
extern void read_boot_clock64(struct timespec64 *ts);
274
extern int update_persistent_clock(struct timespec now);
275
extern int update_persistent_clock64(struct timespec64 now);
276 277 278


#endif