1
2#ifndef _LINUX_TIMEKEEPING_H
3#define _LINUX_TIMEKEEPING_H
4
5#include <linux/errno.h>
6
7
8
9void timekeeping_init(void);
10extern int timekeeping_suspended;
11
12
13extern void update_process_times(int user);
14extern void xtime_update(unsigned long ticks);
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16
17
18
19extern int do_settimeofday64(const struct timespec64 *ts);
20extern int do_sys_settimeofday64(const struct timespec64 *tv,
21 const struct timezone *tz);
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41extern void ktime_get_raw_ts64(struct timespec64 *ts);
42extern void ktime_get_ts64(struct timespec64 *ts);
43extern void ktime_get_real_ts64(struct timespec64 *tv);
44extern void ktime_get_coarse_ts64(struct timespec64 *ts);
45extern void ktime_get_coarse_real_ts64(struct timespec64 *ts);
46
47void getboottime64(struct timespec64 *ts);
48
49
50
51
52extern time64_t ktime_get_seconds(void);
53extern time64_t __ktime_get_real_seconds(void);
54extern time64_t ktime_get_real_seconds(void);
55
56
57
58
59
60enum tk_offsets {
61 TK_OFFS_REAL,
62 TK_OFFS_BOOT,
63 TK_OFFS_TAI,
64 TK_OFFS_MAX,
65};
66
67extern ktime_t ktime_get(void);
68extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
69extern ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs);
70extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
71extern ktime_t ktime_get_raw(void);
72extern u32 ktime_get_resolution_ns(void);
73
74
75
76
77static inline ktime_t ktime_get_real(void)
78{
79 return ktime_get_with_offset(TK_OFFS_REAL);
80}
81
82static inline ktime_t ktime_get_coarse_real(void)
83{
84 return ktime_get_coarse_with_offset(TK_OFFS_REAL);
85}
86
87
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90
91
92
93static inline ktime_t ktime_get_boottime(void)
94{
95 return ktime_get_with_offset(TK_OFFS_BOOT);
96}
97
98static inline ktime_t ktime_get_coarse_boottime(void)
99{
100 return ktime_get_coarse_with_offset(TK_OFFS_BOOT);
101}
102
103
104
105
106static inline ktime_t ktime_get_clocktai(void)
107{
108 return ktime_get_with_offset(TK_OFFS_TAI);
109}
110
111static inline ktime_t ktime_get_coarse_clocktai(void)
112{
113 return ktime_get_coarse_with_offset(TK_OFFS_TAI);
114}
115
116static inline ktime_t ktime_get_coarse(void)
117{
118 struct timespec64 ts;
119
120 ktime_get_coarse_ts64(&ts);
121 return timespec64_to_ktime(ts);
122}
123
124static inline u64 ktime_get_coarse_ns(void)
125{
126 return ktime_to_ns(ktime_get_coarse());
127}
128
129static inline u64 ktime_get_coarse_real_ns(void)
130{
131 return ktime_to_ns(ktime_get_coarse_real());
132}
133
134static inline u64 ktime_get_coarse_boottime_ns(void)
135{
136 return ktime_to_ns(ktime_get_coarse_boottime());
137}
138
139static inline u64 ktime_get_coarse_clocktai_ns(void)
140{
141 return ktime_to_ns(ktime_get_coarse_clocktai());
142}
143
144
145
146
147static inline ktime_t ktime_mono_to_real(ktime_t mono)
148{
149 return ktime_mono_to_any(mono, TK_OFFS_REAL);
150}
151
152static inline u64 ktime_get_ns(void)
153{
154 return ktime_to_ns(ktime_get());
155}
156
157static inline u64 ktime_get_real_ns(void)
158{
159 return ktime_to_ns(ktime_get_real());
160}
161
162static inline u64 ktime_get_boottime_ns(void)
163{
164 return ktime_to_ns(ktime_get_boottime());
165}
166
167static inline u64 ktime_get_clocktai_ns(void)
168{
169 return ktime_to_ns(ktime_get_clocktai());
170}
171
172static inline u64 ktime_get_raw_ns(void)
173{
174 return ktime_to_ns(ktime_get_raw());
175}
176
177extern u64 ktime_get_mono_fast_ns(void);
178extern u64 ktime_get_raw_fast_ns(void);
179extern u64 ktime_get_boot_fast_ns(void);
180extern u64 ktime_get_real_fast_ns(void);
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186
187static inline void ktime_get_boottime_ts64(struct timespec64 *ts)
188{
189 *ts = ktime_to_timespec64(ktime_get_boottime());
190}
191
192static inline void ktime_get_coarse_boottime_ts64(struct timespec64 *ts)
193{
194 *ts = ktime_to_timespec64(ktime_get_coarse_boottime());
195}
196
197static inline time64_t ktime_get_boottime_seconds(void)
198{
199 return ktime_divns(ktime_get_coarse_boottime(), NSEC_PER_SEC);
200}
201
202static inline void ktime_get_clocktai_ts64(struct timespec64 *ts)
203{
204 *ts = ktime_to_timespec64(ktime_get_clocktai());
205}
206
207static inline void ktime_get_coarse_clocktai_ts64(struct timespec64 *ts)
208{
209 *ts = ktime_to_timespec64(ktime_get_coarse_clocktai());
210}
211
212static inline time64_t ktime_get_clocktai_seconds(void)
213{
214 return ktime_divns(ktime_get_coarse_clocktai(), NSEC_PER_SEC);
215}
216
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219
220extern bool timekeeping_rtc_skipsuspend(void);
221extern bool timekeeping_rtc_skipresume(void);
222
223extern void timekeeping_inject_sleeptime64(const struct timespec64 *delta);
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233
234struct system_time_snapshot {
235 u64 cycles;
236 ktime_t real;
237 ktime_t raw;
238 unsigned int clock_was_set_seq;
239 u8 cs_was_changed_seq;
240};
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249struct system_device_crosststamp {
250 ktime_t device;
251 ktime_t sys_realtime;
252 ktime_t sys_monoraw;
253};
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261
262struct system_counterval_t {
263 u64 cycles;
264 struct clocksource *cs;
265};
266
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269
270extern int get_device_system_crosststamp(
271 int (*get_time_fn)(ktime_t *device_time,
272 struct system_counterval_t *system_counterval,
273 void *ctx),
274 void *ctx,
275 struct system_time_snapshot *history,
276 struct system_device_crosststamp *xtstamp);
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280
281extern void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot);
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285
286extern int persistent_clock_is_local;
287
288extern void read_persistent_clock64(struct timespec64 *ts);
289void read_persistent_wall_and_boot_offset(struct timespec64 *wall_clock,
290 struct timespec64 *boot_offset);
291extern int update_persistent_clock64(struct timespec64 now);
292
293#endif
294