[PATCHv2 net-next 3/3] mlx4: add gettimex64() ptp method
From: Mahesh Bandewar <hidden>
Date: 2024-10-12 11:48:05
Subsystem:
mellanox ethernet driver (mlx4_en), mellanox mlx4 core vpi driver, networking drivers, the rest · Maintainers:
Tariq Toukan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Introduce the gettimex64() PTP method implementation, which enhances the PTP clock read operation by providing pre- and post-timestamps to determine the clock-read-call-width. Signed-off-by: Mahesh Bandewar <redacted> --- drivers/net/ethernet/mellanox/mlx4/en_clock.c | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
index 69c5e4c5e036..d3f6ece1531e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c@@ -202,6 +202,26 @@ static int mlx4_en_phc_gettime(struct ptp_clock_info *ptp, return 0; } +static int mlx4_en_phc_gettimex(struct ptp_clock_info *ptp, + struct timespec64 *ts, + struct ptp_system_timestamp *sts) +{ + struct mlx4_en_dev *mdev = container_of(ptp, struct mlx4_en_dev, + ptp_clock_info); + unsigned long flags; + u64 ns; + + write_seqlock_irqsave(&mdev->clock_lock, flags); + /* refresh the clock_cache but get the pre/post ts */ + mlx4_en_read_clock(mdev, sts); + ns = timecounter_read(&mdev->clock); + write_sequnlock_irqrestore(&mdev->clock_lock, flags); + + *ts = ns_to_timespec64(ns); + + return 0; +} + /** * mlx4_en_phc_settime - Set the current time on the hardware clock * @ptp: ptp clock structure
@@ -255,6 +275,7 @@ static const struct ptp_clock_info mlx4_en_ptp_clock_info = { .adjfine = mlx4_en_phc_adjfine, .adjtime = mlx4_en_phc_adjtime, .gettime64 = mlx4_en_phc_gettime, + .gettimex64 = mlx4_en_phc_gettimex, .settime64 = mlx4_en_phc_settime, .enable = mlx4_en_phc_enable, };
--
2.47.0.rc1.288.g06298d1525-goog