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 timespec current_kernel_time(void);
  22 /* does not take xtime_lock */
  23 struct timespec __current_kernel_time(void);
  24
  25 /*
  26  * timespec based interfaces
  27  */
  28 struct timespec64 get_monotonic_coarse64(void);
  29 extern void getrawmonotonic64(struct timespec64 *ts);
  30 extern void ktime_get_ts64(struct timespec64 *ts);
  31
  32 extern int __getnstimeofday64(struct timespec64 *tv);
  33 extern void getnstimeofday64(struct timespec64 *tv);
  34
  35 #if BITS_PER_LONG == 64
  36 /**
  37  * Deprecated. Use do_settimeofday64().
  38  */
  39 static inline int do_settimeofday(const struct timespec *ts)
  40 {
  41         return do_settimeofday64(ts);
  42 }
  43
  44 static inline int __getnstimeofday(struct timespec *ts)
  45 {
  46         return __getnstimeofday64(ts);
  47 }
  48
  49 static inline void getnstimeofday(struct timespec *ts)
  50 {
  51         getnstimeofday64(ts);
  52 }
  53
  54 static inline void ktime_get_ts(struct timespec *ts)
  55 {
  56         ktime_get_ts64(ts);
  57 }
  58
  59 static inline void ktime_get_real_ts(struct timespec *ts)
  60 {
  61         getnstimeofday64(ts);
  62 }
  63
  64 static inline void getrawmonotonic(struct timespec *ts)
  65 {
  66         getrawmonotonic64(ts);
  67 }
  68
  69 static inline struct timespec get_monotonic_coarse(void)
  70 {
  71         return get_monotonic_coarse64();
  72 }
  73 #else
  74 /**
  75  * Deprecated. Use do_settimeofday64().
  76  */
  77 static inline int do_settimeofday(const struct timespec *ts)
  78 {
  79         struct timespec64 ts64;
  80
  81         ts64 = timespec_to_timespec64(*ts);
  82         return do_settimeofday64(&ts64);
  83 }
  84
  85 static inline int __getnstimeofday(struct timespec *ts)
  86 {
  87         struct timespec64 ts64;
  88         int ret = __getnstimeofday64(&ts64);
  89
  90         *ts = timespec64_to_timespec(ts64);
  91         return ret;
  92 }
  93
  94 static inline void getnstimeofday(struct timespec *ts)
  95 {
  96         struct timespec64 ts64;
  97
  98         getnstimeofday64(&ts64);
  99         *ts = timespec64_to_timespec(ts64);
 100 }
 101
 102 static inline void ktime_get_ts(struct timespec *ts)
 103 {
 104         struct timespec64 ts64;
 105
 106         ktime_get_ts64(&ts64);
 107         *ts = timespec64_to_timespec(ts64);
 108 }
 109
 110 static inline void ktime_get_real_ts(struct timespec *ts)
 111 {
 112         struct timespec64 ts64;
 113
 114         getnstimeofday64(&ts64);
 115         *ts = timespec64_to_timespec(ts64);
 116 }
 117
 118 static inline void getrawmonotonic(struct timespec *ts)
 119 {
 120         struct timespec64 ts64;
 121
 122         getrawmonotonic64(&ts64);
 123         *ts = timespec64_to_timespec(ts64);
 124 }
 125
 126 static inline struct timespec get_monotonic_coarse(void)
 127 {
 128         return timespec64_to_timespec(get_monotonic_coarse64());
 129 }
 130 #endif
 131
 132 extern void getboottime(struct timespec *ts);
 133
 134 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
 135 #define ktime_get_real_ts64(ts) getnstimeofday64(ts)
 136
 137 /*
 138  * ktime_t based interfaces
 139  */
 140
 141 enum tk_offsets {
 142         TK_OFFS_REAL,
 143         TK_OFFS_BOOT,
 144         TK_OFFS_TAI,
 145         TK_OFFS_MAX,
 146 };
 147
 148 extern ktime_t ktime_get(void);
 149 extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
 150 extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
 151 extern ktime_t ktime_get_raw(void);
 152
 153 /**
 154  * ktime_get_real - get the real (wall-) time in ktime_t format
 155  */
 156 static inline ktime_t ktime_get_real(void)
 157 {
 158         return ktime_get_with_offset(TK_OFFS_REAL);
 159 }
 160
 161 /**
 162  * ktime_get_boottime - Returns monotonic time since boot in ktime_t format
 163  *
 164  * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the
 165  * time spent in suspend.
 166  */
 167 static inline ktime_t ktime_get_boottime(void)
 168 {
 169         return ktime_get_with_offset(TK_OFFS_BOOT);
 170 }
 171
 172 /**
 173  * ktime_get_clocktai - Returns the TAI time of day in ktime_t format
 174  */
 175 static inline ktime_t ktime_get_clocktai(void)
 176 {
 177         return ktime_get_with_offset(TK_OFFS_TAI);
 178 }
 179
 180 /**
 181  * ktime_mono_to_real - Convert monotonic time to clock realtime
 182  */
 183 static inline ktime_t ktime_mono_to_real(ktime_t mono)
 184 {
 185         return ktime_mono_to_any(mono, TK_OFFS_REAL);
 186 }
 187
 188 static inline u64 ktime_get_ns(void)
 189 {
 190         return ktime_to_ns(ktime_get());
 191 }
 192
 193 static inline u64 ktime_get_real_ns(void)
 194 {
 195         return ktime_to_ns(ktime_get_real());
 196 }
 197
 198 static inline u64 ktime_get_boot_ns(void)
 199 {
 200         return ktime_to_ns(ktime_get_boottime());
 201 }
 202
 203 static inline u64 ktime_get_raw_ns(void)
 204 {
 205         return ktime_to_ns(ktime_get_raw());
 206 }
 207
 208 extern u64 ktime_get_mono_fast_ns(void);
 209
 210 /*
 211  * Timespec interfaces utilizing the ktime based ones
 212  */
 213 static inline void get_monotonic_boottime(struct timespec *ts)
 214 {
 215         *ts = ktime_to_timespec(ktime_get_boottime());
 216 }
 217
 218 static inline void timekeeping_clocktai(struct timespec *ts)
 219 {
 220         *ts = ktime_to_timespec(ktime_get_clocktai());
 221 }
 222
 223 /*
 224  * RTC specific
 225  */
 226 extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);
 227
 228 /**
 229  * Deprecated. Use timekeeping_inject_sleeptime64().
 230  */
 231 static inline void timekeeping_inject_sleeptime(struct timespec *delta)
 232 {
 233         struct timespec64 delta64;
 234
 235         delta64 = timespec_to_timespec64(*delta);
 236         timekeeping_inject_sleeptime64(&delta64);
 237 }
 238
 239 /*
 240  * PPS accessor
 241  */
 242 extern void getnstime_raw_and_real(struct timespec *ts_raw,
 243                                    struct timespec *ts_real);
 244
 245 /*
 246  * Persistent clock related interfaces
 247  */
 248 extern bool persistent_clock_exist;
 249 extern int persistent_clock_is_local;
 250
 251 static inline bool has_persistent_clock(void)
 252 {
 253         return persistent_clock_exist;
 254 }
 255
 256 extern void read_persistent_clock(struct timespec *ts);
 257 extern void read_boot_clock(struct timespec *ts);
 258 extern int update_persistent_clock(struct timespec now);
 259
 260
 261 #endif