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net/mlx5: support software TX timestamp

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Having a software timestamp (along with existing hardware one) is
useful to trace how the packets flow through the stack.
mlx5e_tx_skb_update_hwts_flags is called from tx paths
to setup HW timestamp; extend it to add software one as well.

Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Signed-off-by: Stanislav Fomichev <stfomichev@gmail.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20250508235109.585096-1-stfomichev@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Stanislav Fomichev
2025-05-12 18:07:43 -07:00
committed by Jakub Kicinski
parent 0b28182c73
commit 2451d3fb38
2 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+1
View File
@@ -1689,6 +1689,7 @@ int mlx5e_ethtool_get_ts_info(struct mlx5e_priv *priv,
return 0;
info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_RX_HARDWARE |
SOF_TIMESTAMPING_RAW_HARDWARE;
drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+4 -3
View File
@@ -337,10 +337,11 @@ static void mlx5e_sq_calc_wqe_attr(struct sk_buff *skb, const struct mlx5e_tx_at
};
}
static void mlx5e_tx_skb_update_hwts_flags(struct sk_buff *skb)
static void mlx5e_tx_skb_update_ts_flags(struct sk_buff *skb)
{
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
skb_tx_timestamp(skb);
}
static void mlx5e_tx_check_stop(struct mlx5e_txqsq *sq)
@@ -392,7 +393,7 @@ mlx5e_txwqe_complete(struct mlx5e_txqsq *sq, struct sk_buff *skb,
cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | attr->opcode);
cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | wqe_attr->ds_cnt);
mlx5e_tx_skb_update_hwts_flags(skb);
mlx5e_tx_skb_update_ts_flags(skb);
sq->pc += wi->num_wqebbs;
@@ -625,7 +626,7 @@ mlx5e_sq_xmit_mpwqe(struct mlx5e_txqsq *sq, struct sk_buff *skb,
mlx5e_dma_push(sq, txd.dma_addr, txd.len, MLX5E_DMA_MAP_SINGLE);
mlx5e_skb_fifo_push(&sq->db.skb_fifo, skb);
mlx5e_tx_mpwqe_add_dseg(sq, &txd);
mlx5e_tx_skb_update_hwts_flags(skb);
mlx5e_tx_skb_update_ts_flags(skb);
if (unlikely(mlx5e_tx_mpwqe_is_full(&sq->mpwqe))) {
/* Might stop the queue and affect the retval of __netdev_tx_sent_queue. */