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 extern time64_t ktime_get_seconds(void); 32 extern time64_t ktime_get_real_seconds(void); 33 34 extern int __getnstimeofday64(struct timespec64 *tv); 35 extern void getnstimeofday64(struct timespec64 *tv); 36 37 #if BITS_PER_LONG == 64 38 /** 39 * Deprecated. Use do_settimeofday64(). 40 */ 41 static inline int do_settimeofday(const struct timespec *ts) 42 { 43 return do_settimeofday64(ts); 44 } 45 46 static inline int __getnstimeofday(struct timespec *ts) 47 { 48 return __getnstimeofday64(ts); 49 } 50 51 static inline void getnstimeofday(struct timespec *ts) 52 { 53 getnstimeofday64(ts); 54 } 55 56 static inline void ktime_get_ts(struct timespec *ts) 57 { 58 ktime_get_ts64(ts); 59 } 60 61 static inline void ktime_get_real_ts(struct timespec *ts) 62 { 63 getnstimeofday64(ts); 64 } 65 66 static inline void getrawmonotonic(struct timespec *ts) 67 { 68 getrawmonotonic64(ts); 69 } 70 71 static inline struct timespec get_monotonic_coarse(void) 72 { 73 return get_monotonic_coarse64(); 74 } 75 #else 76 /** 77 * Deprecated. Use do_settimeofday64(). 78 */ 79 static inline int do_settimeofday(const struct timespec *ts) 80 { 81 struct timespec64 ts64; 82 83 ts64 = timespec_to_timespec64(*ts); 84 return do_settimeofday64(&ts64); 85 } 86 87 static inline int __getnstimeofday(struct timespec *ts) 88 { 89 struct timespec64 ts64; 90 int ret = __getnstimeofday64(&ts64); 91 92 *ts = timespec64_to_timespec(ts64); 93 return ret; 94 } 95 96 static inline void getnstimeofday(struct timespec *ts) 97 { 98 struct timespec64 ts64; 99 100 getnstimeofday64(&ts64); 101 *ts = timespec64_to_timespec(ts64); 102 } 103 104 static inline void ktime_get_ts(struct timespec *ts) 105 { 106 struct timespec64 ts64; 107 108 ktime_get_ts64(&ts64); 109 *ts = timespec64_to_timespec(ts64); 110 } 111 112 static inline void ktime_get_real_ts(struct timespec *ts) 113 { 114 struct timespec64 ts64; 115 116 getnstimeofday64(&ts64); 117 *ts = timespec64_to_timespec(ts64); 118 } 119 120 static inline void getrawmonotonic(struct timespec *ts) 121 { 122 struct timespec64 ts64; 123 124 getrawmonotonic64(&ts64); 125 *ts = timespec64_to_timespec(ts64); 126 } 127 128 static inline struct timespec get_monotonic_coarse(void) 129 { 130 return timespec64_to_timespec(get_monotonic_coarse64()); 131 } 132 #endif 133 134 extern void getboottime(struct timespec *ts); 135 136 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts) 137 #define ktime_get_real_ts64(ts) getnstimeofday64(ts) 138 139 /* 140 * ktime_t based interfaces 141 */ 142 143 enum tk_offsets { 144 TK_OFFS_REAL, 145 TK_OFFS_BOOT, 146 TK_OFFS_TAI, 147 TK_OFFS_MAX, 148 }; 149 150 extern ktime_t ktime_get(void); 151 extern ktime_t ktime_get_with_offset(enum tk_offsets offs); 152 extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); 153 extern ktime_t ktime_get_raw(void); 154 155 /** 156 * ktime_get_real - get the real (wall-) time in ktime_t format 157 */ 158 static inline ktime_t ktime_get_real(void) 159 { 160 return ktime_get_with_offset(TK_OFFS_REAL); 161 } 162 163 /** 164 * ktime_get_boottime - Returns monotonic time since boot in ktime_t format 165 * 166 * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the 167 * time spent in suspend. 168 */ 169 static inline ktime_t ktime_get_boottime(void) 170 { 171 return ktime_get_with_offset(TK_OFFS_BOOT); 172 } 173 174 /** 175 * ktime_get_clocktai - Returns the TAI time of day in ktime_t format 176 */ 177 static inline ktime_t ktime_get_clocktai(void) 178 { 179 return ktime_get_with_offset(TK_OFFS_TAI); 180 } 181 182 /** 183 * ktime_mono_to_real - Convert monotonic time to clock realtime 184 */ 185 static inline ktime_t ktime_mono_to_real(ktime_t mono) 186 { 187 return ktime_mono_to_any(mono, TK_OFFS_REAL); 188 } 189 190 static inline u64 ktime_get_ns(void) 191 { 192 return ktime_to_ns(ktime_get()); 193 } 194 195 static inline u64 ktime_get_real_ns(void) 196 { 197 return ktime_to_ns(ktime_get_real()); 198 } 199 200 static inline u64 ktime_get_boot_ns(void) 201 { 202 return ktime_to_ns(ktime_get_boottime()); 203 } 204 205 static inline u64 ktime_get_raw_ns(void) 206 { 207 return ktime_to_ns(ktime_get_raw()); 208 } 209 210 extern u64 ktime_get_mono_fast_ns(void); 211 212 /* 213 * Timespec interfaces utilizing the ktime based ones 214 */ 215 static inline void get_monotonic_boottime(struct timespec *ts) 216 { 217 *ts = ktime_to_timespec(ktime_get_boottime()); 218 } 219 220 static inline void timekeeping_clocktai(struct timespec *ts) 221 { 222 *ts = ktime_to_timespec(ktime_get_clocktai()); 223 } 224 225 /* 226 * RTC specific 227 */ 228 extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); 229 230 /* 231 * PPS accessor 232 */ 233 extern void getnstime_raw_and_real(struct timespec *ts_raw, 234 struct timespec *ts_real); 235 236 /* 237 * Persistent clock related interfaces 238 */ 239 extern bool persistent_clock_exist; 240 extern int persistent_clock_is_local; 241 242 static inline bool has_persistent_clock(void) 243 { 244 return persistent_clock_exist; 245 } 246 247 extern void read_persistent_clock(struct timespec *ts); 248 extern void read_boot_clock(struct timespec *ts); 249 extern int update_persistent_clock(struct timespec now); 250 251 252 #endif 253