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net/mlx5e: Re-eanble client vlan TX acceleration 

This reverts commit cd58c714ac "net/mlx5e: Disable client vlan TX acceleration".

Bring back client vlan insertion offload, the original
performance issue was found and fixed in the next patch.

Signed-off-by: Achiad Shochat <achiad@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Achiad Shochat 2015-11-03 08:07:23 +02:00 committed by David S. Miller
parent fe9f4fe58d
commit e4cf27bd9c
2 changed files with 22 additions and 2 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -2004,6 +2004,7 @@ static void mlx5e_build_netdev(struct net_device *netdev)
netdev->vlan_features |= NETIF_F_LRO;
netdev->hw_features = netdev->vlan_features;
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;

23
drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
View File

@ -124,6 +124,21 @@ static inline u16 mlx5e_get_inline_hdr_size(struct mlx5e_sq *sq,
return MLX5E_MIN_INLINE;
}
static inline void mlx5e_insert_vlan(void *start, struct sk_buff *skb, u16 ihs)
{
struct vlan_ethhdr *vhdr = (struct vlan_ethhdr *)start;
int cpy1_sz = 2 * ETH_ALEN;
int cpy2_sz = ihs - cpy1_sz - VLAN_HLEN;
skb_copy_from_linear_data(skb, vhdr, cpy1_sz);
skb_pull_inline(skb, cpy1_sz);
vhdr->h_vlan_proto = skb->vlan_proto;
vhdr->h_vlan_TCI = cpu_to_be16(skb_vlan_tag_get(skb));
skb_copy_from_linear_data(skb, &vhdr->h_vlan_encapsulated_proto,
cpy2_sz);
skb_pull_inline(skb, cpy2_sz);
}
static netdev_tx_t mlx5e_sq_xmit(struct mlx5e_sq *sq, struct sk_buff *skb)
{
struct mlx5_wq_cyc *wq = &sq->wq;
@ -175,8 +190,12 @@ static netdev_tx_t mlx5e_sq_xmit(struct mlx5e_sq *sq, struct sk_buff *skb)
ETH_ZLEN);
}
skb_copy_from_linear_data(skb, eseg->inline_hdr_start, ihs);
skb_pull_inline(skb, ihs);
if (skb_vlan_tag_present(skb)) {
mlx5e_insert_vlan(eseg->inline_hdr_start, skb, ihs);
} else {
skb_copy_from_linear_data(skb, eseg->inline_hdr_start, ihs);
skb_pull_inline(skb, ihs);
}
eseg->inline_hdr_sz = cpu_to_be16(ihs);