iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net/mlx4_en: Add tx queue maxrate support

Browse Source 
Add ndo_set_tx_maxrate support.

To support per tx queue maxrate limit, we use the update-qp firmware
command to do run-time rate setting for the qp that serves this tx ring.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2015-03-18 14:57:35 +02:00 committed by David S. Miller
parent fc31e2560a
commit c10e4fc6c4
1 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
View File

@ -2379,6 +2379,33 @@ static netdev_features_t mlx4_en_features_check(struct sk_buff *skb,
}
#endif
int mlx4_en_set_tx_maxrate(struct net_device *dev, int queue_index, u32 maxrate)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_tx_ring *tx_ring = priv->tx_ring[queue_index];
struct mlx4_update_qp_params params;
int err;
if (!(priv->mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QP_RATE_LIMIT))
return -EOPNOTSUPP;
/* rate provided to us in Mbs, check if it fits into 12 bits, if not use Gbs */
if (maxrate >> 12) {
params.rate_unit = MLX4_QP_RATE_LIMIT_GBS;
params.rate_val = maxrate / 1000;
} else if (maxrate) {
params.rate_unit = MLX4_QP_RATE_LIMIT_MBS;
params.rate_val = maxrate;
} else { /* zero serves to revoke the QP rate-limitation */
params.rate_unit = 0;
params.rate_val = 0;
}
err = mlx4_update_qp(priv->mdev->dev, tx_ring->qpn, MLX4_UPDATE_QP_RATE_LIMIT,
&params);
return err;
}
static const struct net_device_ops mlx4_netdev_ops = {
.ndo_open = mlx4_en_open,
.ndo_stop = mlx4_en_close,
@ -2410,6 +2437,7 @@ static const struct net_device_ops mlx4_netdev_ops = {
.ndo_del_vxlan_port = mlx4_en_del_vxlan_port,
.ndo_features_check = mlx4_en_features_check,
#endif
.ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate,
};
static const struct net_device_ops mlx4_netdev_ops_master = {
@ -2444,6 +2472,7 @@ static const struct net_device_ops mlx4_netdev_ops_master = {
.ndo_del_vxlan_port = mlx4_en_del_vxlan_port,
.ndo_features_check = mlx4_en_features_check,
#endif
.ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate,
};
struct mlx4_en_bond {