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net/mlx5e: Introduce lost_cqe statistic counter for PTP Tx port timestamping CQ

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Track the number of times a CQE was expected to not be delivered on PTP Tx
port timestamping CQ. A CQE is expected to not be delivered if a certain
amount of time passes since the corresponding CQE containing the DMA
timestamp information has arrived. Increment the late_cqe counter when such
a CQE does manage to be delivered to the CQ.

Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/20240403212931.128541-3-rrameshbabu@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Rahul Rameshbabu 2024-04-03 14:28:40 -07:00 committed by Jakub Kicinski
parent 0e9c127729
commit adda540180
4 changed files with 9 additions and 0 deletions
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6
Documentation/networking/device_drivers/ethernet/mellanox/mlx5/counters.rst
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@ -702,6 +702,12 @@ the software port.
the device typically ensures not posting the CQE.
- Error
* - `ptp_cq[i]_lost_cqe`
- Number of times a CQE is expected to not be delivered on the PTP
timestamping CQE by the device due to a time delta elapsing. If such a
CQE is somehow delivered, `ptp_cq[i]_late_cqe` is incremented.
- Error
.. [#ring_global] The corresponding ring and global counters do not share the
same name (i.e. do not follow the common naming scheme).

1
drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
View File

@ -169,6 +169,7 @@ static void mlx5e_ptpsq_mark_ts_cqes_undelivered(struct mlx5e_ptpsq *ptpsq,
WARN_ON_ONCE(!pos->inuse);
pos->inuse = false;
list_del(&pos->entry);
ptpsq->cq_stats->lost_cqe++;
}
spin_unlock_bh(&cqe_list->tracker_list_lock);
}

1
drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
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@ -2178,6 +2178,7 @@ static const struct counter_desc ptp_cq_stats_desc[] = {
{ 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, late_cqe) },
{ MLX5E_DECLARE_PTP_CQ_STAT(struct mlx5e_ptp_cq_stats, lost_cqe) },
};
static const struct counter_desc ptp_rq_stats_desc[] = {

1
drivers/net/ethernet/mellanox/mlx5/core/en_stats.h
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@ -463,6 +463,7 @@ struct mlx5e_ptp_cq_stats {
u64 abort;
u64 abort_abs_diff_ns;
u64 late_cqe;
u64 lost_cqe;
};
struct mlx5e_rep_stats {