include/linux/timekeeping.h

   1 #ifndef _LINUX_TIMEKEEPING_H
   2 #define _LINUX_TIMEKEEPING_H
   3
   4 /* Included from linux/ktime.h */
   5
   6 void timekeeping_init(void);
   7 extern int timekeeping_suspended;
   8
   9 /*
  10  * Get and set timeofday
  11  */
  12 extern void do_gettimeofday(struct timeval *tv);
  13 extern int do_settimeofday64(const struct timespec64 *ts);
  14 extern int do_sys_settimeofday(const struct timespec *tv,
  15                                const struct timezone *tz);
  16
  17 /*
  18  * Kernel time accessors
  19  */
  20 unsigned long get_seconds(void);
  21 struct timespec64 current_kernel_time64(void);
  22 /* does not take xtime_lock */
  23 struct timespec __current_kernel_time(void);
  24
  25 static inline struct timespec current_kernel_time(void)
  26 {
  27         struct timespec64 now = current_kernel_time64();
  28
  29         return timespec64_to_timespec(now);
  30 }
  31
  32 /*
  33  * timespec based interfaces
  34  */
  35 struct timespec64 get_monotonic_coarse64(void);
  36 extern void getrawmonotonic64(struct timespec64 *ts);
  37 extern void ktime_get_ts64(struct timespec64 *ts);
  38 extern time64_t ktime_get_seconds(void);
  39 extern time64_t ktime_get_real_seconds(void);
  40
  41 extern int __getnstimeofday64(struct timespec64 *tv);
  42 extern void getnstimeofday64(struct timespec64 *tv);
  43 extern void getboottime64(struct timespec64 *ts);
  44
  45 #if BITS_PER_LONG == 64
  46 /**
  47  * Deprecated. Use do_settimeofday64().
  48  */
  49 static inline int do_settimeofday(const struct timespec *ts)
  50 {
  51         return do_settimeofday64(ts);
  52 }
  53
  54 static inline int __getnstimeofday(struct timespec *ts)
  55 {
  56         return __getnstimeofday64(ts);
  57 }
  58
  59 static inline void getnstimeofday(struct timespec *ts)
  60 {
  61         getnstimeofday64(ts);
  62 }
  63
  64 static inline void ktime_get_ts(struct timespec *ts)
  65 {
  66         ktime_get_ts64(ts);
  67 }
  68
  69 static inline void ktime_get_real_ts(struct timespec *ts)
  70 {
  71         getnstimeofday64(ts);
  72 }
  73
  74 static inline void getrawmonotonic(struct timespec *ts)
  75 {
  76         getrawmonotonic64(ts);
  77 }
  78
  79 static inline struct timespec get_monotonic_coarse(void)
  80 {
  81         return get_monotonic_coarse64();
  82 }
  83
  84 static inline void getboottime(struct timespec *ts)
  85 {
  86         return getboottime64(ts);
  87 }
  88 #else
  89 /**
  90  * Deprecated. Use do_settimeofday64().
  91  */
  92 static 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
 100 static 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
 109 static inline void getnstimeofday(struct timespec *ts)
 110 {
 111         struct timespec64 ts64;
 112
 113         getnstimeofday64(&ts64);
 114         *ts = timespec64_to_timespec(ts64);
 115 }
 116
 117 static 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
 125 static 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 }
 132
 133 static inline void getrawmonotonic(struct timespec *ts)
 134 {
 135         struct timespec64 ts64;
 136
 137         getrawmonotonic64(&ts64);
 138         *ts = timespec64_to_timespec(ts64);
 139 }
 140
 141 static inline struct timespec get_monotonic_coarse(void)
 142 {
 143         return timespec64_to_timespec(get_monotonic_coarse64());
 144 }
 145
 146 static inline void getboottime(struct timespec *ts)
 147 {
 148         struct timespec64 ts64;
 149
 150         getboottime64(&ts64);
 151         *ts = timespec64_to_timespec(ts64);
 152 }
 153 #endif
 154
 155 #define ktime_get_real_ts64(ts) getnstimeofday64(ts)
 156
 157 /*
 158  * ktime_t based interfaces
 159  */
 160
 161 enum tk_offsets {
 162         TK_OFFS_REAL,
 163         TK_OFFS_BOOT,
 164         TK_OFFS_TAI,
 165         TK_OFFS_MAX,
 166 };
 167
 168 extern ktime_t ktime_get(void);
 169 extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
 170 extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
 171 extern ktime_t ktime_get_raw(void);
 172 extern u32 ktime_get_resolution_ns(void);
 173
 174 /**
 175  * ktime_get_real - get the real (wall-) time in ktime_t format
 176  */
 177 static inline ktime_t ktime_get_real(void)
 178 {
 179         return ktime_get_with_offset(TK_OFFS_REAL);
 180 }
 181
 182 /**
 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  */
 188 static inline ktime_t ktime_get_boottime(void)
 189 {
 190         return ktime_get_with_offset(TK_OFFS_BOOT);
 191 }
 192
 193 /**
 194  * ktime_get_clocktai - Returns the TAI time of day in ktime_t format
 195  */
 196 static inline ktime_t ktime_get_clocktai(void)
 197 {
 198         return ktime_get_with_offset(TK_OFFS_TAI);
 199 }
 200
 201 /**
 202  * ktime_mono_to_real - Convert monotonic time to clock realtime
 203  */
 204 static inline ktime_t ktime_mono_to_real(ktime_t mono)
 205 {
 206         return ktime_mono_to_any(mono, TK_OFFS_REAL);
 207 }
 208
 209 static inline u64 ktime_get_ns(void)
 210 {
 211         return ktime_to_ns(ktime_get());
 212 }
 213
 214 static inline u64 ktime_get_real_ns(void)
 215 {
 216         return ktime_to_ns(ktime_get_real());
 217 }
 218
 219 static inline u64 ktime_get_boot_ns(void)
 220 {
 221         return ktime_to_ns(ktime_get_boottime());
 222 }
 223
 224 static inline u64 ktime_get_tai_ns(void)
 225 {
 226         return ktime_to_ns(ktime_get_clocktai());
 227 }
 228
 229 static inline u64 ktime_get_raw_ns(void)
 230 {
 231         return ktime_to_ns(ktime_get_raw());
 232 }
 233
 234 extern u64 ktime_get_mono_fast_ns(void);
 235 extern u64 ktime_get_raw_fast_ns(void);
 236
 237 /*
 238  * Timespec interfaces utilizing the ktime based ones
 239  */
 240 static inline void get_monotonic_boottime(struct timespec *ts)
 241 {
 242         *ts = ktime_to_timespec(ktime_get_boottime());
 243 }
 244
 245 static inline void get_monotonic_boottime64(struct timespec64 *ts)
 246 {
 247         *ts = ktime_to_timespec64(ktime_get_boottime());
 248 }
 249
 250 static inline void timekeeping_clocktai(struct timespec *ts)
 251 {
 252         *ts = ktime_to_timespec(ktime_get_clocktai());
 253 }
 254
 255 /*
 256  * RTC specific
 257  */
 258 extern bool timekeeping_rtc_skipsuspend(void);
 259 extern bool timekeeping_rtc_skipresume(void);
 260
 261 extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);
 262
 263 /*
 264  * PPS accessor
 265  */
 266 extern void ktime_get_raw_and_real_ts64(struct timespec64 *ts_raw,
 267                                         struct timespec64 *ts_real);
 268
 269 /*
 270  * Persistent clock related interfaces
 271  */
 272 extern int persistent_clock_is_local;
 273
 274 extern void read_persistent_clock(struct timespec *ts);
 275 extern void read_persistent_clock64(struct timespec64 *ts);
 276 extern void read_boot_clock64(struct timespec64 *ts);
 277 extern int update_persistent_clock(struct timespec now);
 278 extern int update_persistent_clock64(struct timespec64 now);
 279
 280
 281 #endif