net/mlx4_en: Implement mcast loopback prevention for ETH qps

[cascardo/linux.git] / drivers / net / ethernet / mellanox / mlx4 / en_resources.c

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_resources.c b/drivers/net/ethernet/mellanox/mlx4/en_resources.c
index e482fa1..12aab5a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_resources.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_resources.c
@@ -69,6 +69,15 @@ void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
        context->pri_path.counter_index = priv->counter_index;
        context->cqn_send = cpu_to_be32(cqn);
        context->cqn_recv = cpu_to_be32(cqn);
+       if (!rss &&
+           (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK) &&
+           context->pri_path.counter_index !=
+                           MLX4_SINK_COUNTER_INDEX(mdev->dev)) {
+               /* disable multicast loopback to qp with same counter */
+               if (!(dev->features & NETIF_F_LOOPBACK))
+                       context->pri_path.fl |= MLX4_FL_ETH_SRC_CHECK_MC_LB;
+               context->pri_path.control |= MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER;
+       }
        context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
        if (!(dev->features & NETIF_F_HW_VLAN_CTAG_RX))
                context->param3 |= cpu_to_be32(1 << 30);
@@ -80,6 +89,22 @@ void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
        }
 }
 
+int mlx4_en_change_mcast_lb(struct mlx4_en_priv *priv, struct mlx4_qp *qp,
+                           int loopback)
+{
+       int ret;
+       struct mlx4_update_qp_params qp_params;
+
+       memset(&qp_params, 0, sizeof(qp_params));
+       if (!loopback)
+               qp_params.flags = MLX4_UPDATE_QP_PARAMS_FLAGS_ETH_CHECK_MC_LB;
+
+       ret = mlx4_update_qp(priv->mdev->dev, qp->qpn,
+                            MLX4_UPDATE_QP_ETH_SRC_CHECK_MC_LB,
+                            &qp_params);
+
+       return ret;
+}
 
 int mlx4_en_map_buffer(struct mlx4_buf *buf)
 {