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Commit c10e4fc6 authored by Or Gerlitz's avatar Or Gerlitz Committed by David S. Miller
Browse files

net/mlx4_en: Add tx queue maxrate support 



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: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarIdo Shamay <idos@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fc31e256

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

+29 −0
Original line number Original line Diff line number Diff line
@@ -2379,6 +2379,33 @@ static netdev_features_t mlx4_en_features_check(struct sk_buff *skb, 
}

}

#endif

#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 = {

static const struct net_device_ops mlx4_netdev_ops = {

	.ndo_open		= mlx4_en_open,

	.ndo_open		= mlx4_en_open,

	.ndo_stop		= mlx4_en_close,

	.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_del_vxlan_port	= mlx4_en_del_vxlan_port,

	.ndo_features_check	= mlx4_en_features_check,

	.ndo_features_check	= mlx4_en_features_check,

#endif

#endif

	.ndo_set_tx_maxrate	= mlx4_en_set_tx_maxrate,

};

};





static const struct net_device_ops mlx4_netdev_ops_master = {

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_del_vxlan_port	= mlx4_en_del_vxlan_port,

	.ndo_features_check	= mlx4_en_features_check,

	.ndo_features_check	= mlx4_en_features_check,

#endif

#endif

	.ndo_set_tx_maxrate	= mlx4_en_set_tx_maxrate,

};

};





struct mlx4_en_bond {

struct mlx4_en_bond {