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net: lan78xx: Add support for VLAN tag stripping.

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The chip supports stripping the VLAN tag and reporting it
in metadata.
Complete the support for this.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dave Stevenson 2018-06-25 15:07:14 +01:00 committed by David S. Miller
parent 4a27327b15
commit ec21ecf0aa
1 changed files with 22 additions and 0 deletions
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22
drivers/net/usb/lan78xx.c
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@ -64,6 +64,7 @@
#define DEFAULT_RX_CSUM_ENABLE (true)
#define DEFAULT_TSO_CSUM_ENABLE (true)
#define DEFAULT_VLAN_FILTER_ENABLE (true)
#define DEFAULT_VLAN_RX_OFFLOAD (true)
#define TX_OVERHEAD (8)
#define RXW_PADDING 2
@ -2363,6 +2364,11 @@ static int lan78xx_set_features(struct net_device *netdev,
pdata->rfe_ctl &= ~(RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_);
}
if (features & NETIF_F_HW_VLAN_CTAG_RX)
pdata->rfe_ctl |= RFE_CTL_VLAN_STRIP_;
else
pdata->rfe_ctl &= ~RFE_CTL_VLAN_STRIP_;
if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
pdata->rfe_ctl |= RFE_CTL_VLAN_FILTER_;
else
@ -2976,6 +2982,9 @@ static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf)
if (DEFAULT_TSO_CSUM_ENABLE)
dev->net->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_SG;
if (DEFAULT_VLAN_RX_OFFLOAD)
dev->net->features |= NETIF_F_HW_VLAN_CTAG_RX;
if (DEFAULT_VLAN_FILTER_ENABLE)
dev->net->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
@ -3052,6 +3061,16 @@ static void lan78xx_rx_csum_offload(struct lan78xx_net *dev,
}
}
static void lan78xx_rx_vlan_offload(struct lan78xx_net *dev,
struct sk_buff *skb,
u32 rx_cmd_a, u32 rx_cmd_b)
{
if ((dev->net->features & NETIF_F_HW_VLAN_CTAG_RX) &&
(rx_cmd_a & RX_CMD_A_FVTG_))
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
(rx_cmd_b & 0xffff));
}
static void lan78xx_skb_return(struct lan78xx_net *dev, struct sk_buff *skb)
{
int status;
@ -3116,6 +3135,8 @@ static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb)
if (skb->len == size) {
lan78xx_rx_csum_offload(dev, skb,
rx_cmd_a, rx_cmd_b);
lan78xx_rx_vlan_offload(dev, skb,
rx_cmd_a, rx_cmd_b);
skb_trim(skb, skb->len - 4); /* remove fcs */
skb->truesize = size + sizeof(struct sk_buff);
@ -3134,6 +3155,7 @@ static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb)
skb_set_tail_pointer(skb2, size);
lan78xx_rx_csum_offload(dev, skb2, rx_cmd_a, rx_cmd_b);
lan78xx_rx_vlan_offload(dev, skb2, rx_cmd_a, rx_cmd_b);
skb_trim(skb2, skb2->len - 4); /* remove fcs */
skb2->truesize = size + sizeof(struct sk_buff);