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net/mlx5e: Update MPWQE stride size when modifying CQE compress state

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When the admin enables/disables cqe compression, updating
mpwqe stride size is required:
    CQE compress ON  ==> stride size = 256B
    CQE compress OFF ==> stride size = 64B

This is already done on driver load via mlx5e_set_rq_type_params, all we
need is just to call it on arbitrary admin changes of cqe compression
state via priv flags or when changing timestamping state
(as it is mutually exclusive with cqe compression).

This bug introduces no functional damage, it only makes cqe compression
occur less often, since in ConnectX4-LX CQE compression is performed
only on packets smaller than stride size.

Tested:
 ethtool --set-priv-flags ethxx rx_cqe_compress on
 pktgen with  64 < pkt size < 256 and netperf TCP_STREAM (IPv4/IPv6)
 verify `ethtool -S ethxx | grep compress` are advancing more often
 (rapidly)

Fixes: 7219ab34f1 ("net/mlx5e: CQE compression")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Saeed Mahameed 2017-02-22 17:20:15 +02:00 committed by David S. Miller
parent b0d4660b4c
commit 6dc4b54e77
4 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -816,6 +816,7 @@ int mlx5e_get_max_linkspeed(struct mlx5_core_dev *mdev, u32 *speed);
void mlx5e_set_rx_cq_mode_params(struct mlx5e_params *params,
u8 cq_period_mode);
void mlx5e_set_rq_type_params(struct mlx5e_priv *priv, u8 rq_type);
static inline void mlx5e_tx_notify_hw(struct mlx5e_sq *sq,
struct mlx5_wqe_ctrl_seg *ctrl, int bf_sz)

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

@ -1487,6 +1487,7 @@ static int set_pflag_rx_cqe_compress(struct net_device *netdev,
mlx5e_modify_rx_cqe_compression_locked(priv, enable);
priv->params.rx_cqe_compress_def = enable;
mlx5e_set_rq_type_params(priv, priv->params.rq_wq_type);
return 0;
}

2
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -79,7 +79,7 @@ static bool mlx5e_check_fragmented_striding_rq_cap(struct mlx5_core_dev *mdev)
MLX5_CAP_ETH(mdev, reg_umr_sq);
}
static void mlx5e_set_rq_type_params(struct mlx5e_priv *priv, u8 rq_type)
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;

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

@ -172,6 +172,7 @@ void mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool val)
mlx5e_close_locked(priv->netdev);
MLX5E_SET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_COMPRESS, val);
mlx5e_set_rq_type_params(priv, priv->params.rq_wq_type);
if (was_opened)
mlx5e_open_locked(priv->netdev);