Commit 4f38a6db authored by Paolo Abeni's avatar Paolo Abeni
Browse files

Merge tag 'ktime-get-clock-ts64-for-ptp' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 



Base implementation for PTP with a temporary CLOCK_AUX* workaround to
allow integration of depending changes into the networking tree.

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parents 135faae6 5b605dbe

include/linux/timekeeping.h

+10 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ 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);

extern void ktime_get_clock_ts64(clockid_t id, struct timespec64 *ts);



/* Multigrain timestamp interfaces */

extern void ktime_get_coarse_real_ts64_mg(struct timespec64 *ts);
@@ -345,4 +346,13 @@ void read_persistent_wall_and_boot_offset(struct timespec64 *wall_clock, 
extern int update_persistent_clock64(struct timespec64 now);

#endif



/* Temporary workaround to avoid merge dependencies and cross tree messes */

#ifndef CLOCK_AUX

#define CLOCK_AUX			MAX_CLOCKS

#define MAX_AUX_CLOCKS			8

#define CLOCK_AUX_LAST			(CLOCK_AUX + MAX_AUX_CLOCKS - 1)



static inline bool ktime_get_aux_ts64(clockid_t id, struct timespec64 *kt) { return false; }

#endif



#endif

kernel/time/timekeeping.c

+33 −0
Original line number Diff line number Diff line
@@ -1573,6 +1573,39 @@ void ktime_get_raw_ts64(struct timespec64 *ts) 
}

EXPORT_SYMBOL(ktime_get_raw_ts64);



/**

 * ktime_get_clock_ts64 - Returns time of a clock in a timespec

 * @id:		POSIX clock ID of the clock to read

 * @ts:		Pointer to the timespec64 to be set

 *

 * The timestamp is invalidated (@ts->sec is set to -1) if the

 * clock @id is not available.

 */

void ktime_get_clock_ts64(clockid_t id, struct timespec64 *ts)

{

	/* Invalidate time stamp */

	ts->tv_sec = -1;

	ts->tv_nsec = 0;



	switch (id) {

	case CLOCK_REALTIME:

		ktime_get_real_ts64(ts);

		return;

	case CLOCK_MONOTONIC:

		ktime_get_ts64(ts);

		return;

	case CLOCK_MONOTONIC_RAW:

		ktime_get_raw_ts64(ts);

		return;

	case CLOCK_AUX ... CLOCK_AUX_LAST:

		if (IS_ENABLED(CONFIG_POSIX_AUX_CLOCKS))

			ktime_get_aux_ts64(id, ts);

		return;

	default:

		WARN_ON_ONCE(1);

	}

}

EXPORT_SYMBOL_GPL(ktime_get_clock_ts64);



/**

 * timekeeping_valid_for_hres - Check if timekeeping is suitable for hres