From e3b9fd9134771f1be164c5d35c26bb17db9bcc49 Mon Sep 17 00:00:00 2001 From: Vince Bridgers Date: Tue, 14 Jan 2014 13:42:05 -0600 Subject: [PATCH] stmmac: Add vlan rx for better GRO performance. GRO requires VLANs to be removed before aggregation can occur. The Synopsys EMAC does not strip VLAN tags so this must be done by the driver. Signed-off-by: Vince Bridgers Signed-off-by: David S. Miller --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index b8e3a4ce24b04..ecdc8ab50425d 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1951,6 +1951,23 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; } +static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb) +{ + struct ethhdr *ehdr; + u16 vlanid; + + if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) == + NETIF_F_HW_VLAN_CTAG_RX && + !__vlan_get_tag(skb, &vlanid)) { + /* pop the vlan tag */ + ehdr = (struct ethhdr *)skb->data; + memmove(skb->data + VLAN_HLEN, ehdr, ETH_ALEN * 2); + skb_pull(skb, VLAN_HLEN); + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); + } +} + + /** * stmmac_rx_refill: refill used skb preallocated buffers * @priv: driver private structure @@ -2102,6 +2119,8 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit) print_pkt(skb->data, frame_len); } + stmmac_rx_vlan(priv->dev, skb); + skb->protocol = eth_type_trans(skb, priv->dev); if (unlikely(!coe)) -- 2.39.5