From: Carolina Jubran Date: Tue, 8 Jul 2025 21:16:23 +0000 (+0300) Subject: net/mlx5e: Remove unused VLAN insertion logic in TX path X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ade89d1f2486e5189b3a3f0a9e917defa4ff0779;p=thirdparty%2Fkernel%2Flinux.git net/mlx5e: Remove unused VLAN insertion logic in TX path The VLAN insertion capability (`wqe_vlan_insert`) was never enabled on all mlx5 devices. When VLAN TX offload is advertised but this capability is not supported, the driver uses inline headers to insert the VLAN tag. To support this, the driver used to set the `MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE` bit to enforce L2 inline mode when `wqe_vlan_insert` was not supported. Since the capability is disabled on all devices, this logic was always active, and the SQ flag has become redundant. L2 inline is enforced unconditionally for VLAN-tagged packets. The `skb_vlan_tag_present()` check in the else-if block of `mlx5e_sq_xmit_wqe()` is never true by this point in the TX flow, as the VLAN tag has already been inserted by the driver using inline headers. As a result, this code is never executed. Remove the redundant SQ state, dead VLAN insertion code block, and related logic. Signed-off-by: Carolina Jubran Signed-off-by: Tariq Toukan Reviewed-by: Simon Horman Link: https://patch.msgid.link/1752009387-13300-2-git-send-email-tariqt@nvidia.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index 65a73913b9a24..64e69e616b1f7 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -383,7 +383,6 @@ enum { MLX5E_SQ_STATE_RECOVERING, MLX5E_SQ_STATE_IPSEC, MLX5E_SQ_STATE_DIM, - MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, MLX5E_SQ_STATE_PENDING_XSK_TX, MLX5E_SQ_STATE_PENDING_TLS_RX_RESYNC, MLX5E_NUM_SQ_STATES, /* Must be kept last */ diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c index 5d0014129a7e0..391b4e9c9dc49 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c @@ -340,8 +340,6 @@ static int mlx5e_ptp_alloc_txqsq(struct mlx5e_ptp *c, int txq_ix, sq->stats = &c->priv->ptp_stats.sq[tc]; sq->ptpsq = ptpsq; INIT_WORK(&sq->recover_work, mlx5e_tx_err_cqe_work); - if (!MLX5_CAP_ETH(mdev, wqe_vlan_insert)) - set_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state); sq->stop_room = param->stop_room; sq->ptp_cyc2time = mlx5_sq_ts_translator(mdev); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c index c3bda4612fa9c..bd96988e102c3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c @@ -13,7 +13,6 @@ static const char * const sq_sw_state_type_name[] = { [MLX5E_SQ_STATE_RECOVERING] = "recovering", [MLX5E_SQ_STATE_IPSEC] = "ipsec", [MLX5E_SQ_STATE_DIM] = "dim", - [MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE] = "vlan_need_l2_inline", [MLX5E_SQ_STATE_PENDING_XSK_TX] = "pending_xsk_tx", [MLX5E_SQ_STATE_PENDING_TLS_RX_RESYNC] = "pending_tls_rx_resync", }; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index e8e5b347f9b2d..fee323ade522b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -1677,8 +1677,6 @@ static int mlx5e_alloc_txqsq(struct mlx5e_channel *c, sq->hw_mtu = MLX5E_SW2HW_MTU(params, params->sw_mtu); sq->max_sq_mpw_wqebbs = mlx5e_get_max_sq_aligned_wqebbs(mdev); INIT_WORK(&sq->recover_work, mlx5e_tx_err_cqe_work); - if (!MLX5_CAP_ETH(mdev, wqe_vlan_insert)) - set_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state); if (mlx5_ipsec_device_caps(c->priv->mdev)) set_bit(MLX5E_SQ_STATE_IPSEC, &sq->state); if (param->is_mpw) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c index 55a8629f07923..e6a301ba32544 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c @@ -256,8 +256,7 @@ mlx5e_tx_wqe_inline_mode(struct mlx5e_txqsq *sq, struct sk_buff *skb, mode = sq->min_inline_mode; - if (skb_vlan_tag_present(skb) && - test_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state)) + if (skb_vlan_tag_present(skb)) mode = max_t(u8, MLX5_INLINE_MODE_L2, mode); return mode; @@ -483,12 +482,6 @@ mlx5e_sq_xmit_wqe(struct mlx5e_txqsq *sq, struct sk_buff *skb, } eseg->inline_hdr.sz |= cpu_to_be16(ihs); dseg += wqe_attr->ds_cnt_inl; - } else if (skb_vlan_tag_present(skb)) { - eseg->insert.type = cpu_to_be16(MLX5_ETH_WQE_INSERT_VLAN); - if (skb->vlan_proto == cpu_to_be16(ETH_P_8021AD)) - eseg->insert.type |= cpu_to_be16(MLX5_ETH_WQE_SVLAN); - eseg->insert.vlan_tci = cpu_to_be16(skb_vlan_tag_get(skb)); - stats->added_vlan_packets++; } dseg += wqe_attr->ds_cnt_ids;