Release 4.16 include/linux/timekeeping.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TIMEKEEPING_H
#define _LINUX_TIMEKEEPING_H
#include <linux/errno.h>
/* Included from linux/ktime.h */
void timekeeping_init(void);
extern int timekeeping_suspended;
/* Architecture timer tick functions: */
extern void update_process_times(int user);
extern void xtime_update(unsigned long ticks);
/*
* Get and set timeofday
*/
extern int do_settimeofday64(const struct timespec64 *ts);
extern int do_sys_settimeofday64(const struct timespec64 *tv,
const struct timezone *tz);
/*
* Kernel time accessors
*/
struct timespec64 current_kernel_time64(void);
/*
* timespec64 based interfaces
*/
struct timespec64 get_monotonic_coarse64(void);
extern void getrawmonotonic64(struct timespec64 *ts);
extern void ktime_get_ts64(struct timespec64 *ts);
extern time64_t ktime_get_seconds(void);
extern time64_t ktime_get_real_seconds(void);
extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);
extern void getboottime64(struct timespec64 *ts);
#define ktime_get_real_ts64(ts) getnstimeofday64(ts)
/*
* ktime_t based interfaces
*/
enum tk_offsets {
TK_OFFS_REAL,
TK_OFFS_BOOT,
TK_OFFS_TAI,
TK_OFFS_MAX,
};
extern ktime_t ktime_get(void);
extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
extern ktime_t ktime_get_raw(void);
extern u32 ktime_get_resolution_ns(void);
/**
* ktime_get_real - get the real (wall-) time in ktime_t format
*/
static inline ktime_t ktime_get_real(void)
{
return ktime_get_with_offset(TK_OFFS_REAL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 15 | 100.00% | 2 | 100.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
/**
* ktime_get_boottime - Returns monotonic time since boot in ktime_t format
*
* This is similar to CLOCK_MONTONIC/ktime_get, but also includes the
* time spent in suspend.
*/
static inline ktime_t ktime_get_boottime(void)
{
return ktime_get_with_offset(TK_OFFS_BOOT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
/**
* ktime_get_clocktai - Returns the TAI time of day in ktime_t format
*/
static inline ktime_t ktime_get_clocktai(void)
{
return ktime_get_with_offset(TK_OFFS_TAI);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
/**
* ktime_mono_to_real - Convert monotonic time to clock realtime
*/
static inline ktime_t ktime_mono_to_real(ktime_t mono)
{
return ktime_mono_to_any(mono, TK_OFFS_REAL);
}
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| Thomas Gleixner | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
static inline u64 ktime_get_ns(void)
{
return ktime_to_ns(ktime_get());
}
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| Thomas Gleixner | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline u64 ktime_get_real_ns(void)
{
return ktime_to_ns(ktime_get_real());
}
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| Thomas Gleixner | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline u64 ktime_get_boot_ns(void)
{
return ktime_to_ns(ktime_get_boottime());
}
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| Thomas Gleixner | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline u64 ktime_get_tai_ns(void)
{
return ktime_to_ns(ktime_get_clocktai());
}
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| Peter Zijlstra | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline u64 ktime_get_raw_ns(void)
{
return ktime_to_ns(ktime_get_raw());
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
extern u64 ktime_get_mono_fast_ns(void);
extern u64 ktime_get_raw_fast_ns(void);
extern u64 ktime_get_boot_fast_ns(void);
extern u64 ktime_get_real_fast_ns(void);
/*
* timespec64 interfaces utilizing the ktime based ones
*/
static inline void get_monotonic_boottime64(struct timespec64 *ts)
{
*ts = ktime_to_timespec64(ktime_get_boottime());
}
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| Person | Tokens | Prop | Commits | CommitProp |
| John Stultz | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
static inline void timekeeping_clocktai64(struct timespec64 *ts)
{
*ts = ktime_to_timespec64(ktime_get_clocktai());
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Deepa Dinamani | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
/*
* RTC specific
*/
extern bool timekeeping_rtc_skipsuspend(void);
extern bool timekeeping_rtc_skipresume(void);
extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);
/*
* struct system_time_snapshot - simultaneous raw/real time capture with
* counter value
* @cycles: Clocksource counter value to produce the system times
* @real: Realtime system time
* @raw: Monotonic raw system time
* @clock_was_set_seq: The sequence number of clock was set events
* @cs_was_changed_seq: The sequence number of clocksource change events
*/
struct system_time_snapshot {
u64 cycles;
ktime_t real;
ktime_t raw;
unsigned int clock_was_set_seq;
u8 cs_was_changed_seq;
};
/*
* struct system_device_crosststamp - system/device cross-timestamp
* (syncronized capture)
* @device: Device time
* @sys_realtime: Realtime simultaneous with device time
* @sys_monoraw: Monotonic raw simultaneous with device time
*/
struct system_device_crosststamp {
ktime_t device;
ktime_t sys_realtime;
ktime_t sys_monoraw;
};
/*
* struct system_counterval_t - system counter value with the pointer to the
* corresponding clocksource
* @cycles: System counter value
* @cs: Clocksource corresponding to system counter value. Used by
* timekeeping code to verify comparibility of two cycle values
*/
struct system_counterval_t {
u64 cycles;
struct clocksource *cs;
};
/*
* Get cross timestamp between system clock and device clock
*/
extern int get_device_system_crosststamp(
int (*get_time_fn)(ktime_t *device_time,
struct system_counterval_t *system_counterval,
void *ctx),
void *ctx,
struct system_time_snapshot *history,
struct system_device_crosststamp *xtstamp);
/*
* Simultaneously snapshot realtime and monotonic raw clocks
*/
extern void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot);
/*
* Persistent clock related interfaces
*/
extern int persistent_clock_is_local;
extern void read_persistent_clock64(struct timespec64 *ts);
extern void read_boot_clock64(struct timespec64 *ts);
extern int update_persistent_clock64(struct timespec64 now);
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 311 | 52.62% | 13 | 33.33% |
| Christopher S. Hall | 100 | 16.92% | 3 | 7.69% |
| Xunlei Pang | 45 | 7.61% | 6 | 15.38% |
| John Stultz | 35 | 5.92% | 4 | 10.26% |
| Peter Zijlstra | 23 | 3.89% | 2 | 5.13% |
| Deepa Dinamani | 21 | 3.55% | 1 | 2.56% |
| Ingo Molnar | 18 | 3.05% | 1 | 2.56% |
| Heena Sirwani | 14 | 2.37% | 2 | 5.13% |
| Harald Geyer | 7 | 1.18% | 1 | 2.56% |
| Joel Fernandes | 7 | 1.18% | 1 | 2.56% |
| Baolin Wang | 6 | 1.02% | 2 | 5.13% |
| Arnd Bergmann | 2 | 0.34% | 1 | 2.56% |
| Christoph Hellwig | 1 | 0.17% | 1 | 2.56% |
| Greg Kroah-Hartman | 1 | 0.17% | 1 | 2.56% |
| Total | 591 | 100.00% | 39 | 100.00% |
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