diff options
| author | Maor Gottlieb <maorg@mellanox.com> | 2015-10-15 14:44:39 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-10-21 23:16:47 -0400 |
| commit | 74194fb9c80cedb3130d26802c52deec3caebc75 (patch) | |
| tree | e29c44c7b9904914bcde2a773e046d68e50a598a /drivers/net/ethernet/mellanox/mlx4/en_main.c | |
| parent | 9a8928359736ab170303ee8a2cc15db54e3a4a8f (diff) | |
| download | lwn-74194fb9c80cedb3130d26802c52deec3caebc75.tar.gz lwn-74194fb9c80cedb3130d26802c52deec3caebc75.zip | |
net/mlx4_en: Implement mcast loopback prevention for ETH qps
Set the mcast loopback prevention bit in the QPC for ETH MLX QPs (not
RSS QPs), when the firmware supports this feature. In addition, all rx
ring QPs need to be updated in order not to enforce loopback checks.
This prevents getting packets we sent both from the network stack and
the HCA. Loopback prevention is done by comparing the counter indices of
the sent and receiving QPs. If they're equal, packets aren't
loopback-ed.
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/en_main.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_main.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c index a946e4bf71d2..005f910ec955 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c @@ -123,6 +123,28 @@ void mlx4_en_update_loopback_state(struct net_device *dev, */ if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback) priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK; + + mutex_lock(&priv->mdev->state_lock); + if (priv->mdev->dev->caps.flags2 & + MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB && + priv->rss_map.indir_qp.qpn) { + int i; + int err = 0; + int loopback = !!(features & NETIF_F_LOOPBACK); + + for (i = 0; i < priv->rx_ring_num; i++) { + int ret; + + ret = mlx4_en_change_mcast_lb(priv, + &priv->rss_map.qps[i], + loopback); + if (!err) + err = ret; + } + if (err) + mlx4_warn(priv->mdev, "failed to change mcast loopback\n"); + } + mutex_unlock(&priv->mdev->state_lock); } static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) |