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| author |   Aya Levin <ayal@nvidia.com> | 2022-07-04 19:34:26 +0300 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@nvidia.com> | 2022-07-19 13:32:54 -0700 |
| commit | 58a518948f60153e8f6cb8361d2712aa3a1af94a (patch) | |
| tree | 1ba983983d3a4c3b7a75028a9b2262b8def62ae5 /drivers/net/ethernet/mellanox/mlx5/core/en_stats.c | |
| parent | net/mlx5: Expose ts_cqe_metadata_size2wqe_counter (diff) | |
| download | wireguard-linux-58a518948f60153e8f6cb8361d2712aa3a1af94a.tar.xz wireguard-linux-58a518948f60153e8f6cb8361d2712aa3a1af94a.zip | |
net/mlx5e: Add resiliency for PTP TX port timestamp
PTP TX port timestamp relies on receiving 2 CQEs for each outgoing
packet (WQE). The regular CQE has a less accurate timestamp than the
wire CQE. On link change, the wire CQE may get lost. Let the driver
detect and restore the relation between the CQEs, and re-sync after
timeout.
Add resiliency for this as follows: add id (producer counter)
into the WQE's metadata. This id will be received in the wire
CQE (in wqe_counter field). On handling the wire CQE, if there is no
match, replay the PTP application with the time-stamp from the regular
CQE and restore the sync between the CQEs and their SKBs. This patch
adds 2 ptp counters:
1) ptp_cq0_resync_event: number of times a mismatch was detected between
the regular CQE and the wire CQE.
2) ptp_cq0_resync_cqe: total amount of missing wire CQEs.
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_stats.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_stats.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c index 1a88406ee6d2..7409829d1201 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c @@ -2100,6 +2100,8 @@ static const struct counter_desc ptp_cq_stats_desc[] = { { MLX5E_DECLARE_PTP_CQ_STAT(struct mlx5e_ptp_cq_stats, err_cqe) }, { MLX5E_DECLARE_PTP_CQ_STAT(struct mlx5e_ptp_cq_stats, abort) }, { MLX5E_DECLARE_PTP_CQ_STAT(struct mlx5e_ptp_cq_stats, abort_abs_diff_ns) }, + { MLX5E_DECLARE_PTP_CQ_STAT(struct mlx5e_ptp_cq_stats, resync_cqe) }, + { MLX5E_DECLARE_PTP_CQ_STAT(struct mlx5e_ptp_cq_stats, resync_event) }, }; static const struct counter_desc ptp_rq_stats_desc[] = { |