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_settimeofday(const struct timespec *tv); 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 timespec get_monotonic_coarse(void); 29 extern void getrawmonotonic(struct timespec *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 static inline int __getnstimeofday(struct timespec *ts) 37 { 38 return __getnstimeofday64(ts); 39 } 40 41 static inline void getnstimeofday(struct timespec *ts) 42 { 43 getnstimeofday64(ts); 44 } 45 46 static inline void ktime_get_ts(struct timespec *ts) 47 { 48 ktime_get_ts64(ts); 49 } 50 51 static inline void ktime_get_real_ts(struct timespec *ts) 52 { 53 getnstimeofday64(ts); 54 } 55 56 #else 57 static inline int __getnstimeofday(struct timespec *ts) 58 { 59 struct timespec64 ts64; 60 int ret = __getnstimeofday64(&ts64); 61 62 *ts = timespec64_to_timespec(ts64); 63 return ret; 64 } 65 66 static inline void getnstimeofday(struct timespec *ts) 67 { 68 struct timespec64 ts64; 69 70 getnstimeofday64(&ts64); 71 *ts = timespec64_to_timespec(ts64); 72 } 73 74 static inline void ktime_get_ts(struct timespec *ts) 75 { 76 struct timespec64 ts64; 77 78 ktime_get_ts64(&ts64); 79 *ts = timespec64_to_timespec(ts64); 80 } 81 82 static inline void ktime_get_real_ts(struct timespec *ts) 83 { 84 struct timespec64 ts64; 85 86 getnstimeofday64(&ts64); 87 *ts = timespec64_to_timespec(ts64); 88 } 89 #endif 90 91 extern void getboottime(struct timespec *ts); 92 93 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts) 94 #define ktime_get_real_ts64(ts) getnstimeofday64(ts) 95 96 /* 97 * ktime_t based interfaces 98 */ 99 100 enum tk_offsets { 101 TK_OFFS_REAL, 102 TK_OFFS_BOOT, 103 TK_OFFS_TAI, 104 TK_OFFS_MAX, 105 }; 106 107 extern ktime_t ktime_get(void); 108 extern ktime_t ktime_get_with_offset(enum tk_offsets offs); 109 extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); 110 extern ktime_t ktime_get_raw(void); 111 112 /** 113 * ktime_get_real - get the real (wall-) time in ktime_t format 114 */ 115 static inline ktime_t ktime_get_real(void) 116 { 117 return ktime_get_with_offset(TK_OFFS_REAL); 118 } 119 120 /** 121 * ktime_get_boottime - Returns monotonic time since boot in ktime_t format 122 * 123 * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the 124 * time spent in suspend. 125 */ 126 static inline ktime_t ktime_get_boottime(void) 127 { 128 return ktime_get_with_offset(TK_OFFS_BOOT); 129 } 130 131 /** 132 * ktime_get_clocktai - Returns the TAI time of day in ktime_t format 133 */ 134 static inline ktime_t ktime_get_clocktai(void) 135 { 136 return ktime_get_with_offset(TK_OFFS_TAI); 137 } 138 139 /** 140 * ktime_mono_to_real - Convert monotonic time to clock realtime 141 */ 142 static inline ktime_t ktime_mono_to_real(ktime_t mono) 143 { 144 return ktime_mono_to_any(mono, TK_OFFS_REAL); 145 } 146 147 static inline u64 ktime_get_ns(void) 148 { 149 return ktime_to_ns(ktime_get()); 150 } 151 152 static inline u64 ktime_get_real_ns(void) 153 { 154 return ktime_to_ns(ktime_get_real()); 155 } 156 157 static inline u64 ktime_get_boot_ns(void) 158 { 159 return ktime_to_ns(ktime_get_boottime()); 160 } 161 162 static inline u64 ktime_get_raw_ns(void) 163 { 164 return ktime_to_ns(ktime_get_raw()); 165 } 166 167 extern u64 ktime_get_mono_fast_ns(void); 168 169 /* 170 * Timespec interfaces utilizing the ktime based ones 171 */ 172 static inline void get_monotonic_boottime(struct timespec *ts) 173 { 174 *ts = ktime_to_timespec(ktime_get_boottime()); 175 } 176 177 static inline void timekeeping_clocktai(struct timespec *ts) 178 { 179 *ts = ktime_to_timespec(ktime_get_clocktai()); 180 } 181 182 /* 183 * RTC specific 184 */ 185 extern void timekeeping_inject_sleeptime(struct timespec *delta); 186 187 /* 188 * PPS accessor 189 */ 190 extern void getnstime_raw_and_real(struct timespec *ts_raw, 191 struct timespec *ts_real); 192 193 /* 194 * Persistent clock related interfaces 195 */ 196 extern bool persistent_clock_exist; 197 extern int persistent_clock_is_local; 198 199 static inline bool has_persistent_clock(void) 200 { 201 return persistent_clock_exist; 202 } 203 204 extern void read_persistent_clock(struct timespec *ts); 205 extern void read_boot_clock(struct timespec *ts); 206 extern int update_persistent_clock(struct timespec now); 207 208 209 #endif 210