diff options
| author | Or Gerlitz | 2013-12-23 15:09:44 +0100 |
|---|---|---|
| committer | David S. Miller | 2013-12-31 20:31:43 +0100 |
| commit | 837052d0ccc5a789a578f8b628ba154b63bd51ea (patch) | |
| tree | be8f0742d4f92bbbbd09b0710dc9eab5a3e85811 /drivers/net/ethernet/mellanox/mlx4/en_rx.c | |
| parent | net/mlx4_core: Add basic support for TCP/IP offloads under tunneling (diff) | |
| download | kernel-qcow2-linux-837052d0ccc5a789a578f8b628ba154b63bd51ea.tar.gz kernel-qcow2-linux-837052d0ccc5a789a578f8b628ba154b63bd51ea.tar.xz kernel-qcow2-linux-837052d0ccc5a789a578f8b628ba154b63bd51ea.zip | |
net/mlx4_en: Add netdev support for TCP/IP offloads of vxlan tunneling
When the device tunneling offloads mode is vxlan do the following
- call SET_PORT with the relevant setting
- add DMFS steering vxlan rule for the device self and multicast mac addresses
of the form: {<ETH, outer-mac> <VXLAN, ANY vnid> <ETH, ANY mac>} --> RSS QP
- set relevant QPC fields in RSS context and RX ring QPs
- in TX flow, set WQE fields to generate HW checksum, and handle gso skbs
which are marked for encapsulation such that the HW will segment them properly.
- in RX flow, read HW offloaded checksum for encapsulated packets from the CQE
- advertize hw_enc_features and NETIF_F_GSO_UDP_TUNNEL to the networking stack
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/en_rx.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_rx.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 2aa0ae1ea45a..3b66f26ba049 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -631,6 +631,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud int ip_summed; int factor = priv->cqe_factor; u64 timestamp; + bool l2_tunnel; if (!priv->port_up) return 0; @@ -709,6 +710,8 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud length -= ring->fcs_del; ring->bytes += length; ring->packets++; + l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) && + (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL)); if (likely(dev->features & NETIF_F_RXCSUM)) { if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) && @@ -738,6 +741,8 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud gro_skb->data_len = length; gro_skb->ip_summed = CHECKSUM_UNNECESSARY; + if (l2_tunnel) + gro_skb->encapsulation = 1; if ((cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK)) && (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) { @@ -790,6 +795,9 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud skb->protocol = eth_type_trans(skb, dev); skb_record_rx_queue(skb, cq->ring); + if (l2_tunnel) + skb->encapsulation = 1; + if (dev->features & NETIF_F_RXHASH) skb_set_hash(skb, be32_to_cpu(cqe->immed_rss_invalid), @@ -1057,6 +1065,12 @@ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv) rss_mask |= MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6; rss_context->base_qpn_udp = rss_context->default_qpn; } + + if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { + en_info(priv, "Setting RSS context tunnel type to RSS on inner headers\n"); + rss_mask |= MLX4_RSS_BY_INNER_HEADERS; + } + rss_context->flags = rss_mask; rss_context->hash_fn = MLX4_RSS_HASH_TOP; for (i = 0; i < 10; i++) |