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Commit 82eaa1fa authored by Raed Salem's avatar Raed Salem Committed by Saeed Mahameed
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net/mlx5e: FPGA, fix Innova IPsec TX offload data path performance 



At Innova IPsec TX offload data path a special software parser metadata
is used to pass some packet attributes to the hardware, this metadata
is passed using the Ethernet control segment of a WQE (a HW descriptor)
header.

The cited commit might nullify this header, hence the metadata is lost,
this caused a significant performance drop during hw offloading
operation.

Fix by restoring the metadata at the Ethernet control segment in case
it was nullified.

Fixes: 37fdffb2 ("net/mlx5: WQ, fixes for fragmented WQ buffers API")
Signed-off-by: default avatarRaed Salem <raeds@mellanox.com>
Reviewed-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent f09bef61

drivers/net/ethernet/mellanox/mlx5/core/en_tx.c

+6 −0
Original line number Diff line number Diff line
@@ -387,8 +387,14 @@ netdev_tx_t mlx5e_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb, 
	num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS);

	contig_wqebbs_room = mlx5_wq_cyc_get_contig_wqebbs(wq, pi);

	if (unlikely(contig_wqebbs_room < num_wqebbs)) {

#ifdef CONFIG_MLX5_EN_IPSEC

		struct mlx5_wqe_eth_seg cur_eth = wqe->eth;

#endif

		mlx5e_fill_sq_frag_edge(sq, wq, pi, contig_wqebbs_room);

		mlx5e_sq_fetch_wqe(sq, &wqe, &pi);

#ifdef CONFIG_MLX5_EN_IPSEC

		wqe->eth = cur_eth;

#endif

	}



	/* fill wqe */