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| author | Achiad Shochat | 2015-07-23 22:35:58 +0200 |
|---|---|---|
| committer | David S. Miller | 2015-07-27 09:29:17 +0200 |
| commit | 58d522912ac7d25b63f468fa4a4e8bb059c5144e (patch) | |
| tree | d106329cbe7ddb86d852a0c71ab8f0899a4fe665 /drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | |
| parent | net/mlx5e: Allocate DMA coherent memory on reader NUMA node (diff) | |
| download | kernel-qcow2-linux-58d522912ac7d25b63f468fa4a4e8bb059c5144e.tar.gz kernel-qcow2-linux-58d522912ac7d25b63f468fa4a4e8bb059c5144e.tar.xz kernel-qcow2-linux-58d522912ac7d25b63f468fa4a4e8bb059c5144e.zip | |
net/mlx5e: Support TX packet copy into WQE
AKA inline WQE.
A TX latency optimization to save data gather DMA reads.
Controlled by ETHTOOL_TX_COPYBREAK.
Signed-off-by: Achiad Shochat <achiad@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c index cb2853570504..14fd82c0d18e 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c @@ -699,6 +699,57 @@ static int mlx5e_set_rxfh(struct net_device *netdev, const u32 *indir, return err; } +static int mlx5e_get_tunable(struct net_device *dev, + const struct ethtool_tunable *tuna, + void *data) +{ + const struct mlx5e_priv *priv = netdev_priv(dev); + int err = 0; + + switch (tuna->id) { + case ETHTOOL_TX_COPYBREAK: + *(u32 *)data = priv->params.tx_max_inline; + break; + default: + err = -EINVAL; + break; + } + + return err; +} + +static int mlx5e_set_tunable(struct net_device *dev, + const struct ethtool_tunable *tuna, + const void *data) +{ + struct mlx5e_priv *priv = netdev_priv(dev); + struct mlx5_core_dev *mdev = priv->mdev; + struct mlx5e_params new_params; + u32 val; + int err = 0; + + switch (tuna->id) { + case ETHTOOL_TX_COPYBREAK: + val = *(u32 *)data; + if (val > mlx5e_get_max_inline_cap(mdev)) { + err = -EINVAL; + break; + } + + mutex_lock(&priv->state_lock); + new_params = priv->params; + new_params.tx_max_inline = val; + err = mlx5e_update_priv_params(priv, &new_params); + mutex_unlock(&priv->state_lock); + break; + default: + err = -EINVAL; + break; + } + + return err; +} + const struct ethtool_ops mlx5e_ethtool_ops = { .get_drvinfo = mlx5e_get_drvinfo, .get_link = ethtool_op_get_link, @@ -715,4 +766,6 @@ const struct ethtool_ops mlx5e_ethtool_ops = { .set_settings = mlx5e_set_settings, .get_rxfh = mlx5e_get_rxfh, .set_rxfh = mlx5e_set_rxfh, + .get_tunable = mlx5e_get_tunable, + .set_tunable = mlx5e_set_tunable, }; |