diff options
| author | Or Gerlitz <ogerlitz@mellanox.com> | 2013-12-23 18:09:44 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-31 23:31:43 +0400 |
| commit | 837052d0ccc5a789a578f8b628ba154b63bd51ea (patch) | |
| tree | be8f0742d4f92bbbbd09b0710dc9eab5a3e85811 /drivers/net/ethernet/mellanox/mlx4/en_tx.c | |
| parent | 7ffdf726cfe0d188907bdbb0e7729fb35a69c219 (diff) | |
| download | linux-837052d0ccc5a789a578f8b628ba154b63bd51ea.tar.xz | |
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_tx.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_tx.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c index e3adcebfdfb8..160e86d21607 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c @@ -39,6 +39,7 @@ #include <linux/if_vlan.h> #include <linux/vmalloc.h> #include <linux/tcp.h> +#include <linux/ip.h> #include <linux/moduleparam.h> #include "mlx4_en.h" @@ -560,7 +561,10 @@ static int get_real_size(struct sk_buff *skb, struct net_device *dev, int real_size; if (skb_is_gso(skb)) { - *lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb); + if (skb->encapsulation) + *lso_header_size = (skb_inner_transport_header(skb) - skb->data) + inner_tcp_hdrlen(skb); + else + *lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb); real_size = CTRL_SIZE + skb_shinfo(skb)->nr_frags * DS_SIZE + ALIGN(*lso_header_size + 4, DS_SIZE); if (unlikely(*lso_header_size != skb_headlen(skb))) { @@ -859,6 +863,14 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev) tx_info->inl = 1; } + if (skb->encapsulation) { + struct iphdr *ipv4 = (struct iphdr *)skb_inner_network_header(skb); + if (ipv4->protocol == IPPROTO_TCP || ipv4->protocol == IPPROTO_UDP) + op_own |= cpu_to_be32(MLX4_WQE_CTRL_IIP | MLX4_WQE_CTRL_ILP); + else + op_own |= cpu_to_be32(MLX4_WQE_CTRL_IIP); + } + ring->prod += nr_txbb; /* If we used a bounce buffer then copy descriptor back into place */ |