From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: [PATCH net-next 10/10] net/mlx4_en: Add support for drop action through ethtool Date: Sun, 1 Jul 2012 12:43:43 +0300 Message-ID: <1341135823-29039-11-git-send-email-ogerlitz@mellanox.com> References: <1341135823-29039-1-git-send-email-ogerlitz@mellanox.com> Cc: roland@kernel.org, yevgenyp@mellanox.com, oren@mellanox.com, netdev@vger.kernel.org, Hadar Hen Zion , Or Gerlitz To: davem@davemloft.net Return-path: Received: from eu1sys200aog111.obsmtp.com ([207.126.144.131]:35977 "HELO eu1sys200aog111.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1755002Ab2GAJn6 (ORCPT ); Sun, 1 Jul 2012 05:43:58 -0400 In-Reply-To: <1341135823-29039-1-git-send-email-ogerlitz@mellanox.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Hadar Hen Zion The drop action is implemented by allocating a QP and keeping it in a reset state such that the HW drops any packets which are steered to that QP. When a drop action is requested, we attach the relevant flow to that QP. Sign-off-by: Hadar Hen Zion Signed-off-by: Or Gerlitz --- drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | 2 +- drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 9 ++++++- drivers/net/ethernet/mellanox/mlx4/en_rx.c | 30 +++++++++++++++++++++++ drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 3 ++ 4 files changed, 42 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c index 30de264..6c44047 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c @@ -814,7 +814,7 @@ static int mlx4_en_flow_replace(struct net_device *dev, /* Allow direct QP attaches if the EN_ETHTOOL_QP_ATTACH flag is set */ if (cmd->fs.ring_cookie == RX_CLS_FLOW_DISC) - return -EOPNOTSUPP; + qpn = priv->drop_qp.qpn; else if (cmd->fs.ring_cookie & EN_ETHTOOL_QP_ATTACH) { qpn = cmd->fs.ring_cookie & (EN_ETHTOOL_QP_ATTACH - 1); } else { diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 46b58d8..ed121dc 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -793,6 +793,10 @@ int mlx4_en_start_port(struct net_device *dev) goto mac_err; } + err = mlx4_en_create_drop_qp(priv); + if (err) + goto rss_err; + /* Configure tx cq's and rings */ for (i = 0; i < priv->tx_ring_num; i++) { /* Configure cq */ @@ -892,7 +896,8 @@ tx_err: mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]); mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]); } - + mlx4_en_destroy_drop_qp(priv); +rss_err: mlx4_en_release_rss_steer(priv); mac_err: mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn); @@ -947,6 +952,8 @@ void mlx4_en_stop_port(struct net_device *dev) /* Flush multicast filter */ mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG); + mlx4_en_destroy_drop_qp(priv); + /* Free TX Rings */ for (i = 0; i < priv->tx_ring_num; i++) { mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]); diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index d49a7ac..a04cbf7 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -844,6 +844,36 @@ out: return err; } +int mlx4_en_create_drop_qp(struct mlx4_en_priv *priv) +{ + int err; + u32 qpn; + + err = mlx4_qp_reserve_range(priv->mdev->dev, 1, 1, &qpn); + if (err) { + en_err(priv, "Failed reserving drop qpn\n"); + return err; + } + err = mlx4_qp_alloc(priv->mdev->dev, qpn, &priv->drop_qp); + if (err) { + en_err(priv, "Failed allocating drop qp\n"); + mlx4_qp_release_range(priv->mdev->dev, qpn, 1); + return err; + } + + return 0; +} + +void mlx4_en_destroy_drop_qp(struct mlx4_en_priv *priv) +{ + u32 qpn; + + qpn = priv->drop_qp.qpn; + mlx4_qp_remove(priv->mdev->dev, &priv->drop_qp); + mlx4_qp_free(priv->mdev->dev, &priv->drop_qp); + mlx4_qp_release_range(priv->mdev->dev, qpn, 1); +} + /* Allocate rx qp's and configure them according to rss map */ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv) { diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index 8882e70..a126321 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -500,6 +500,7 @@ struct mlx4_en_priv { struct mlx4_en_rx_ring rx_ring[MAX_RX_RINGS]; struct mlx4_en_cq *tx_cq; struct mlx4_en_cq rx_cq[MAX_RX_RINGS]; + struct mlx4_qp drop_qp; struct work_struct mcast_task; struct work_struct mac_task; struct work_struct watchdog_task; @@ -586,6 +587,8 @@ void mlx4_en_unmap_buffer(struct mlx4_buf *buf); void mlx4_en_calc_rx_buf(struct net_device *dev); int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv); void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv); +int mlx4_en_create_drop_qp(struct mlx4_en_priv *priv); +void mlx4_en_destroy_drop_qp(struct mlx4_en_priv *priv); int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring); void mlx4_en_rx_irq(struct mlx4_cq *mcq); -- 1.7.1