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net/mlx5e: XDP, Add user control for XDP TX MPWQE feature 

Add ethtool private flag 'xdp_tx_mpwqe' to control the feature
from userspace.
Feature is set ON by default, if supported.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2018-11-20 11:50:30 +02:00 committed by Saeed Mahameed
parent 5e0d2eef77
commit 6277053afa
3 changed files with 34 additions and 1 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/en.h
View File

@ -216,6 +216,7 @@ enum mlx5e_priv_flag {
MLX5E_PFLAG_RX_CQE_COMPRESS,
MLX5E_PFLAG_RX_STRIDING_RQ,
MLX5E_PFLAG_RX_NO_CSUM_COMPLETE,
MLX5E_PFLAG_XDP_TX_MPWQE,
MLX5E_NUM_PFLAGS, /* Keep last */
};

28
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
View File

@ -1672,12 +1672,40 @@ static int set_pflag_rx_no_csum_complete(struct net_device *netdev, bool enable)
return 0;
}
static int set_pflag_xdp_tx_mpwqe(struct net_device *netdev, bool enable)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
struct mlx5_core_dev *mdev = priv->mdev;
struct mlx5e_channels new_channels = {};
int err;
if (enable && !MLX5_CAP_ETH(mdev, enhanced_multi_pkt_send_wqe))
return -EOPNOTSUPP;
new_channels.params = priv->channels.params;
MLX5E_SET_PFLAG(&new_channels.params, MLX5E_PFLAG_XDP_TX_MPWQE, enable);
if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
priv->channels.params = new_channels.params;
return 0;
}
err = mlx5e_open_channels(priv, &new_channels);
if (err)
return err;
mlx5e_switch_priv_channels(priv, &new_channels, NULL);
return 0;
}
static const struct pflag_desc mlx5e_priv_flags[MLX5E_NUM_PFLAGS] = {
{ "rx_cqe_moder", set_pflag_rx_cqe_based_moder },
{ "tx_cqe_moder", set_pflag_tx_cqe_based_moder },
{ "rx_cqe_compress", set_pflag_rx_cqe_compress },
{ "rx_striding_rq", set_pflag_rx_striding_rq },
{ "rx_no_csum_complete", set_pflag_rx_no_csum_complete },
{ "xdp_tx_mpwqe", set_pflag_xdp_tx_mpwqe },
};
static int mlx5e_handle_pflag(struct net_device *netdev,

6
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -2341,7 +2341,7 @@ static void mlx5e_build_xdpsq_param(struct mlx5e_priv *priv,
mlx5e_build_sq_param_common(priv, param);
MLX5_SET(wq, wq, log_wq_sz, params->log_sq_size);
param->is_mpw = MLX5_CAP_ETH(priv->mdev, enhanced_multi_pkt_send_wqe);
param->is_mpw = MLX5E_GET_PFLAG(params, MLX5E_PFLAG_XDP_TX_MPWQE);
}
static void mlx5e_build_channel_param(struct mlx5e_priv *priv,
@ -4595,6 +4595,10 @@ void mlx5e_build_nic_params(struct mlx5_core_dev *mdev,
MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE :
MLX5E_PARAMS_DEFAULT_LOG_SQ_SIZE;
/* XDP SQ */
MLX5E_SET_PFLAG(params, MLX5E_PFLAG_XDP_TX_MPWQE,
MLX5_CAP_ETH(mdev, enhanced_multi_pkt_send_wqe));
/* set CQE compression */
params->rx_cqe_compress_def = false;
if (MLX5_CAP_GEN(mdev, cqe_compression) &&