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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8b094cd0 TG |
2 | #ifndef _LINUX_TIMEKEEPING_H |
3 | #define _LINUX_TIMEKEEPING_H | |
4 | ||
b536fd58 | 5 | #include <linux/errno.h> |
86d34732 | 6 | |
8b094cd0 TG |
7 | /* Included from linux/ktime.h */ |
8 | ||
9 | void timekeeping_init(void); | |
10 | extern int timekeeping_suspended; | |
11 | ||
93b5a9a7 IM |
12 | /* Architecture timer tick functions: */ |
13 | extern void update_process_times(int user); | |
14 | extern void xtime_update(unsigned long ticks); | |
15 | ||
8b094cd0 TG |
16 | /* |
17 | * Get and set timeofday | |
18 | */ | |
21f7eca5 | 19 | extern int do_settimeofday64(const struct timespec64 *ts); |
86d34732 BW |
20 | extern int do_sys_settimeofday64(const struct timespec64 *tv, |
21 | const struct timezone *tz); | |
8758a240 | 22 | |
8b094cd0 | 23 | /* |
6546911e | 24 | * timespec64 based interfaces |
8b094cd0 | 25 | */ |
fb7fcc96 | 26 | extern void ktime_get_raw_ts64(struct timespec64 *ts); |
d6d29896 | 27 | extern void ktime_get_ts64(struct timespec64 *ts); |
edca71fe | 28 | extern void ktime_get_real_ts64(struct timespec64 *tv); |
fb7fcc96 AB |
29 | extern void ktime_get_coarse_ts64(struct timespec64 *ts); |
30 | extern void ktime_get_coarse_real_ts64(struct timespec64 *ts); | |
31 | ||
32 | void getboottime64(struct timespec64 *ts); | |
33 | ||
34 | /* | |
35 | * time64_t base interfaces | |
36 | */ | |
9e3680b1 | 37 | extern time64_t ktime_get_seconds(void); |
6909e29f | 38 | extern time64_t __ktime_get_real_seconds(void); |
dbe7aa62 | 39 | extern time64_t ktime_get_real_seconds(void); |
d6d29896 | 40 | |
8b094cd0 TG |
41 | /* |
42 | * ktime_t based interfaces | |
43 | */ | |
a3ed0e43 | 44 | |
0077dc60 TG |
45 | enum tk_offsets { |
46 | TK_OFFS_REAL, | |
a3ed0e43 | 47 | TK_OFFS_BOOT, |
0077dc60 TG |
48 | TK_OFFS_TAI, |
49 | TK_OFFS_MAX, | |
50 | }; | |
51 | ||
8b094cd0 | 52 | extern ktime_t ktime_get(void); |
0077dc60 | 53 | extern ktime_t ktime_get_with_offset(enum tk_offsets offs); |
9a6b5197 | 54 | extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); |
f519b1a2 | 55 | extern ktime_t ktime_get_raw(void); |
6374f912 | 56 | extern u32 ktime_get_resolution_ns(void); |
8b094cd0 | 57 | |
f5264d5d TG |
58 | /** |
59 | * ktime_get_real - get the real (wall-) time in ktime_t format | |
60 | */ | |
61 | static inline ktime_t ktime_get_real(void) | |
62 | { | |
63 | return ktime_get_with_offset(TK_OFFS_REAL); | |
64 | } | |
65 | ||
a3ed0e43 TG |
66 | /** |
67 | * ktime_get_boottime - Returns monotonic time since boot in ktime_t format | |
68 | * | |
69 | * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the | |
70 | * time spent in suspend. | |
71 | */ | |
72 | static inline ktime_t ktime_get_boottime(void) | |
73 | { | |
74 | return ktime_get_with_offset(TK_OFFS_BOOT); | |
75 | } | |
76 | ||
afab07c0 TG |
77 | /** |
78 | * ktime_get_clocktai - Returns the TAI time of day in ktime_t format | |
79 | */ | |
80 | static inline ktime_t ktime_get_clocktai(void) | |
81 | { | |
82 | return ktime_get_with_offset(TK_OFFS_TAI); | |
83 | } | |
84 | ||
9a6b5197 TG |
85 | /** |
86 | * ktime_mono_to_real - Convert monotonic time to clock realtime | |
87 | */ | |
88 | static inline ktime_t ktime_mono_to_real(ktime_t mono) | |
89 | { | |
90 | return ktime_mono_to_any(mono, TK_OFFS_REAL); | |
91 | } | |
92 | ||
897994e3 TG |
93 | static inline u64 ktime_get_ns(void) |
94 | { | |
95 | return ktime_to_ns(ktime_get()); | |
96 | } | |
97 | ||
98 | static inline u64 ktime_get_real_ns(void) | |
99 | { | |
100 | return ktime_to_ns(ktime_get_real()); | |
101 | } | |
102 | ||
a3ed0e43 TG |
103 | static inline u64 ktime_get_boot_ns(void) |
104 | { | |
105 | return ktime_to_ns(ktime_get_boottime()); | |
106 | } | |
107 | ||
fe5fba05 PZ |
108 | static inline u64 ktime_get_tai_ns(void) |
109 | { | |
110 | return ktime_to_ns(ktime_get_clocktai()); | |
111 | } | |
112 | ||
f519b1a2 TG |
113 | static inline u64 ktime_get_raw_ns(void) |
114 | { | |
115 | return ktime_to_ns(ktime_get_raw()); | |
116 | } | |
117 | ||
4396e058 | 118 | extern u64 ktime_get_mono_fast_ns(void); |
f09cb9a1 | 119 | extern u64 ktime_get_raw_fast_ns(void); |
a3ed0e43 | 120 | extern u64 ktime_get_boot_fast_ns(void); |
4c3711d7 | 121 | extern u64 ktime_get_real_fast_ns(void); |
4396e058 | 122 | |
d6c7270e TG |
123 | /* |
124 | * timespec64 interfaces utilizing the ktime based ones | |
125 | */ | |
fb7fcc96 | 126 | static inline void ktime_get_boottime_ts64(struct timespec64 *ts) |
a3ed0e43 TG |
127 | { |
128 | *ts = ktime_to_timespec64(ktime_get_boottime()); | |
129 | } | |
130 | ||
fb7fcc96 | 131 | static inline void ktime_get_clocktai_ts64(struct timespec64 *ts) |
3c9c12f4 DD |
132 | { |
133 | *ts = ktime_to_timespec64(ktime_get_clocktai()); | |
134 | } | |
135 | ||
8b094cd0 TG |
136 | /* |
137 | * RTC specific | |
138 | */ | |
0fa88cb4 XP |
139 | extern bool timekeeping_rtc_skipsuspend(void); |
140 | extern bool timekeeping_rtc_skipresume(void); | |
141 | ||
04d90890 | 142 | extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); |
143 | ||
9da0f49c CH |
144 | /* |
145 | * struct system_time_snapshot - simultaneous raw/real time capture with | |
146 | * counter value | |
147 | * @cycles: Clocksource counter value to produce the system times | |
148 | * @real: Realtime system time | |
149 | * @raw: Monotonic raw system time | |
2c756feb CH |
150 | * @clock_was_set_seq: The sequence number of clock was set events |
151 | * @cs_was_changed_seq: The sequence number of clocksource change events | |
9da0f49c CH |
152 | */ |
153 | struct system_time_snapshot { | |
a5a1d1c2 | 154 | u64 cycles; |
9da0f49c CH |
155 | ktime_t real; |
156 | ktime_t raw; | |
2c756feb CH |
157 | unsigned int clock_was_set_seq; |
158 | u8 cs_was_changed_seq; | |
9da0f49c CH |
159 | }; |
160 | ||
8006c245 CH |
161 | /* |
162 | * struct system_device_crosststamp - system/device cross-timestamp | |
163 | * (syncronized capture) | |
164 | * @device: Device time | |
165 | * @sys_realtime: Realtime simultaneous with device time | |
166 | * @sys_monoraw: Monotonic raw simultaneous with device time | |
167 | */ | |
168 | struct system_device_crosststamp { | |
169 | ktime_t device; | |
170 | ktime_t sys_realtime; | |
171 | ktime_t sys_monoraw; | |
172 | }; | |
173 | ||
174 | /* | |
175 | * struct system_counterval_t - system counter value with the pointer to the | |
176 | * corresponding clocksource | |
177 | * @cycles: System counter value | |
178 | * @cs: Clocksource corresponding to system counter value. Used by | |
179 | * timekeeping code to verify comparibility of two cycle values | |
180 | */ | |
181 | struct system_counterval_t { | |
a5a1d1c2 | 182 | u64 cycles; |
8006c245 CH |
183 | struct clocksource *cs; |
184 | }; | |
185 | ||
186 | /* | |
187 | * Get cross timestamp between system clock and device clock | |
188 | */ | |
189 | extern int get_device_system_crosststamp( | |
190 | int (*get_time_fn)(ktime_t *device_time, | |
191 | struct system_counterval_t *system_counterval, | |
192 | void *ctx), | |
193 | void *ctx, | |
2c756feb | 194 | struct system_time_snapshot *history, |
8006c245 CH |
195 | struct system_device_crosststamp *xtstamp); |
196 | ||
9da0f49c CH |
197 | /* |
198 | * Simultaneously snapshot realtime and monotonic raw clocks | |
199 | */ | |
200 | extern void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot); | |
201 | ||
8b094cd0 TG |
202 | /* |
203 | * Persistent clock related interfaces | |
204 | */ | |
8b094cd0 TG |
205 | extern int persistent_clock_is_local; |
206 | ||
2ee96632 | 207 | extern void read_persistent_clock64(struct timespec64 *ts); |
9a806ddb | 208 | extern void read_boot_clock64(struct timespec64 *ts); |
3c00a1fe | 209 | extern int update_persistent_clock64(struct timespec64 now); |
8b094cd0 | 210 | |
edca71fe AB |
211 | /* |
212 | * deprecated aliases, don't use in new code | |
213 | */ | |
214 | #define getnstimeofday64(ts) ktime_get_real_ts64(ts) | |
fb7fcc96 AB |
215 | #define get_monotonic_boottime64(ts) ktime_get_boottime_ts64(ts) |
216 | #define getrawmonotonic64(ts) ktime_get_raw_ts64(ts) | |
217 | #define timekeeping_clocktai64(ts) ktime_get_clocktai_ts64(ts) | |
218 | ||
219 | static inline struct timespec64 current_kernel_time64(void) | |
220 | { | |
221 | struct timespec64 ts; | |
222 | ||
223 | ktime_get_coarse_real_ts64(&ts); | |
224 | ||
225 | return ts; | |
226 | } | |
227 | ||
228 | static inline struct timespec64 get_monotonic_coarse64(void) | |
229 | { | |
230 | struct timespec64 ts; | |
231 | ||
232 | ktime_get_coarse_ts64(&ts); | |
233 | ||
234 | return ts; | |
235 | } | |
8b094cd0 TG |
236 | |
237 | #endif |