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net/mlx5e: Do not reduce LRO WQE size when not using build_skb 

When rq_type is Striding RQ, no room of SKB_RESERVE is needed
as SKB allocation is not done via build_skb.

Fixes: e4b8550807 ("net/mlx5e: Slightly reduce hardware LRO size")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tariq Toukan 2017-02-22 17:20:13 +02:00 committed by David S. Miller
parent 6f08a22c5f
commit 4078e637c1
1 changed files with 5 additions and 6 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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@ -82,6 +82,7 @@ static bool mlx5e_check_fragmented_striding_rq_cap(struct mlx5_core_dev *mdev)
static void mlx5e_set_rq_type_params(struct mlx5e_priv *priv, u8 rq_type)
{
priv->params.rq_wq_type = rq_type;
priv->params.lro_wqe_sz = MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ;
switch (priv->params.rq_wq_type) {
case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
priv->params.log_rq_size = is_kdump_kernel() ?
@ -98,6 +99,10 @@ static void mlx5e_set_rq_type_params(struct mlx5e_priv *priv, u8 rq_type)
priv->params.log_rq_size = is_kdump_kernel() ?
MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE :
MLX5E_PARAMS_DEFAULT_LOG_RQ_SIZE;
/* Extra room needed for build_skb */
priv->params.lro_wqe_sz -= MLX5_RX_HEADROOM +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
}
priv->params.min_rx_wqes = mlx5_min_rx_wqes(priv->params.rq_wq_type,
BIT(priv->params.log_rq_size));
@ -3547,12 +3552,6 @@ static void mlx5e_build_nic_netdev_priv(struct mlx5_core_dev *mdev,
mlx5e_build_default_indir_rqt(mdev, priv->params.indirection_rqt,
MLX5E_INDIR_RQT_SIZE, profile->max_nch(mdev));
priv->params.lro_wqe_sz =
MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ -
/* Extra room needed for build_skb */
MLX5_RX_HEADROOM -
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
/* Initialize pflags */
MLX5E_SET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_BASED_MODER,
priv->params.rx_cq_period_mode == MLX5_CQ_PERIOD_MODE_START_FROM_CQE);