310 lines
7.5 KiB
C
310 lines
7.5 KiB
C
/* 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 legacy_timer_tick(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);
|
|
|
|
/*
|
|
* ktime_get() family: read the current time in a multitude of ways,
|
|
*
|
|
* The default time reference is CLOCK_MONOTONIC, starting at
|
|
* boot time but not counting the time spent in suspend.
|
|
* For other references, use the functions with "real", "clocktai",
|
|
* "boottime" and "raw" suffixes.
|
|
*
|
|
* To get the time in a different format, use the ones wit
|
|
* "ns", "ts64" and "seconds" suffix.
|
|
*
|
|
* See Documentation/core-api/timekeeping.rst for more details.
|
|
*/
|
|
|
|
|
|
/*
|
|
* timespec64 based interfaces
|
|
*/
|
|
extern void ktime_get_raw_ts64(struct timespec64 *ts);
|
|
extern void ktime_get_ts64(struct timespec64 *ts);
|
|
extern void ktime_get_real_ts64(struct timespec64 *tv);
|
|
extern void ktime_get_coarse_ts64(struct timespec64 *ts);
|
|
extern void ktime_get_coarse_real_ts64(struct timespec64 *ts);
|
|
|
|
void getboottime64(struct timespec64 *ts);
|
|
|
|
/*
|
|
* time64_t base interfaces
|
|
*/
|
|
extern time64_t ktime_get_seconds(void);
|
|
extern time64_t __ktime_get_real_seconds(void);
|
|
extern time64_t ktime_get_real_seconds(void);
|
|
|
|
/*
|
|
* 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_get_coarse_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);
|
|
}
|
|
|
|
static inline ktime_t ktime_get_coarse_real(void)
|
|
{
|
|
return ktime_get_coarse_with_offset(TK_OFFS_REAL);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
static inline ktime_t ktime_get_coarse_boottime(void)
|
|
{
|
|
return ktime_get_coarse_with_offset(TK_OFFS_BOOT);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
static inline ktime_t ktime_get_coarse_clocktai(void)
|
|
{
|
|
return ktime_get_coarse_with_offset(TK_OFFS_TAI);
|
|
}
|
|
|
|
static inline ktime_t ktime_get_coarse(void)
|
|
{
|
|
struct timespec64 ts;
|
|
|
|
ktime_get_coarse_ts64(&ts);
|
|
return timespec64_to_ktime(ts);
|
|
}
|
|
|
|
static inline u64 ktime_get_coarse_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_coarse());
|
|
}
|
|
|
|
static inline u64 ktime_get_coarse_real_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_coarse_real());
|
|
}
|
|
|
|
static inline u64 ktime_get_coarse_boottime_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_coarse_boottime());
|
|
}
|
|
|
|
static inline u64 ktime_get_coarse_clocktai_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_coarse_clocktai());
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
static inline u64 ktime_get_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get());
|
|
}
|
|
|
|
static inline u64 ktime_get_real_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_real());
|
|
}
|
|
|
|
static inline u64 ktime_get_boottime_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_boottime());
|
|
}
|
|
|
|
static inline u64 ktime_get_clocktai_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_clocktai());
|
|
}
|
|
|
|
static inline u64 ktime_get_raw_ns(void)
|
|
{
|
|
return ktime_to_ns(ktime_get_raw());
|
|
}
|
|
|
|
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/time64_t interfaces utilizing the ktime based ones
|
|
* for API completeness, these could be implemented more efficiently
|
|
* if needed.
|
|
*/
|
|
static inline void ktime_get_boottime_ts64(struct timespec64 *ts)
|
|
{
|
|
*ts = ktime_to_timespec64(ktime_get_boottime());
|
|
}
|
|
|
|
static inline void ktime_get_coarse_boottime_ts64(struct timespec64 *ts)
|
|
{
|
|
*ts = ktime_to_timespec64(ktime_get_coarse_boottime());
|
|
}
|
|
|
|
static inline time64_t ktime_get_boottime_seconds(void)
|
|
{
|
|
return ktime_divns(ktime_get_coarse_boottime(), NSEC_PER_SEC);
|
|
}
|
|
|
|
static inline void ktime_get_clocktai_ts64(struct timespec64 *ts)
|
|
{
|
|
*ts = ktime_to_timespec64(ktime_get_clocktai());
|
|
}
|
|
|
|
static inline void ktime_get_coarse_clocktai_ts64(struct timespec64 *ts)
|
|
{
|
|
*ts = ktime_to_timespec64(ktime_get_coarse_clocktai());
|
|
}
|
|
|
|
static inline time64_t ktime_get_clocktai_seconds(void)
|
|
{
|
|
return ktime_divns(ktime_get_coarse_clocktai(), NSEC_PER_SEC);
|
|
}
|
|
|
|
/*
|
|
* RTC specific
|
|
*/
|
|
extern bool timekeeping_rtc_skipsuspend(void);
|
|
extern bool timekeeping_rtc_skipresume(void);
|
|
|
|
extern void timekeeping_inject_sleeptime64(const struct timespec64 *delta);
|
|
|
|
/*
|
|
* struct ktime_timestanps - Simultaneous mono/boot/real timestamps
|
|
* @mono: Monotonic timestamp
|
|
* @boot: Boottime timestamp
|
|
* @real: Realtime timestamp
|
|
*/
|
|
struct ktime_timestamps {
|
|
u64 mono;
|
|
u64 boot;
|
|
u64 real;
|
|
};
|
|
|
|
/**
|
|
* 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
|
|
* (synchronized 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);
|
|
|
|
/* NMI safe mono/boot/realtime timestamps */
|
|
extern void ktime_get_fast_timestamps(struct ktime_timestamps *snap);
|
|
|
|
/*
|
|
* Persistent clock related interfaces
|
|
*/
|
|
extern int persistent_clock_is_local;
|
|
|
|
extern void read_persistent_clock64(struct timespec64 *ts);
|
|
void read_persistent_wall_and_boot_offset(struct timespec64 *wall_clock,
|
|
struct timespec64 *boot_offset);
|
|
#ifdef CONFIG_GENERIC_CMOS_UPDATE
|
|
extern int update_persistent_clock64(struct timespec64 now);
|
|
#endif
|
|
|
|
#endif
|