net/mlx5: Avoid generating event after PPS out in Real time mode

When in Real-time mode, HW clock is synced with the PTP daemon. Hence
driver should not re-calibrate the next pulse (via MTPPSE repetitive
events mechanism).

This patch arms repetitive events only in free-running mode.

Fixes: 958ab8de5b15 ("net/mlx5: Add cyc2time HW translation mode support")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Eran Ben Elisha <eranbe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index d2ed7b0a18ea433e39467a41cc6164e4bb770681..91e806c1aa21126abe7bcdc9e8817a8efd1bc79c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -472,6 +472,7 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
                        container_of(ptp, struct mlx5_clock, ptp_info);
        struct mlx5_core_dev *mdev =
                        container_of(clock, struct mlx5_core_dev, clock);
+       bool rt_mode = mlx5_real_time_mode(mdev);
        u32 in[MLX5_ST_SZ_DW(mtpps_reg)] = {0};
        struct timespec64 ts;
        u32 field_select = 0;
@@ -535,6 +536,9 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
        if (err)
                return err;
 
+       if (rt_mode)
+               return 0;
+
        return mlx5_set_mtppse(mdev, pin, 0,
                               MLX5_EVENT_MODE_REPETETIVE & on);
 }
@@ -702,20 +706,14 @@ static void ts_next_sec(struct timespec64 *ts)
 static u64 perout_conf_next_event_timer(struct mlx5_core_dev *mdev,
                                        struct mlx5_clock *clock)
 {
-       bool rt_mode = mlx5_real_time_mode(mdev);
        struct timespec64 ts;
        s64 target_ns;
 
-       if (rt_mode)
-               ts = mlx5_ptp_gettimex_real_time(mdev, NULL);
-       else
-               mlx5_ptp_gettimex(&clock->ptp_info, &ts, NULL);
-
+       mlx5_ptp_gettimex(&clock->ptp_info, &ts, NULL);
        ts_next_sec(&ts);
        target_ns = timespec64_to_ns(&ts);
 
-       return rt_mode ? perout_conf_real_time(ts.tv_sec) :
-                        find_target_cycles(mdev, target_ns);
+       return find_target_cycles(mdev, target_ns);
 }
 
 static int mlx5_pps_event(struct notifier_block *nb,