diff options
| -rw-r--r-- | net/dsa/tag_brcm.c | 45 |
1 files changed, 34 insertions, 11 deletions
diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c index 9e082bae3cb0..771409a1e65c 100644 --- a/net/dsa/tag_brcm.c +++ b/net/dsa/tag_brcm.c @@ -59,7 +59,9 @@ #define BRCM_EG_TC_MASK 0x7 #define BRCM_EG_PID_MASK 0x1f -static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev) +static struct sk_buff *brcm_tag_xmit_ll(struct sk_buff *skb, + struct net_device *dev, + unsigned int offset) { struct dsa_port *dp = dsa_slave_to_port(dev); u16 queue = skb_get_queue_mapping(skb); @@ -70,10 +72,10 @@ static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev skb_push(skb, BRCM_TAG_LEN); - memmove(skb->data, skb->data + BRCM_TAG_LEN, 2 * ETH_ALEN); + if (offset) + memmove(skb->data, skb->data + BRCM_TAG_LEN, offset); - /* Build the tag after the MAC Source Address */ - brcm_tag = skb->data + 2 * ETH_ALEN; + brcm_tag = skb->data + offset; /* Set the ingress opcode, traffic class, tag enforcment is * deprecated @@ -94,8 +96,17 @@ static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev return skb; } -static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *pt) +static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + /* Build the tag after the MAC Source Address */ + return brcm_tag_xmit_ll(skb, dev, 2 * ETH_ALEN); +} + +static struct sk_buff *brcm_tag_rcv_ll(struct sk_buff *skb, + struct net_device *dev, + struct packet_type *pt, + unsigned int offset) { int source_port; u8 *brcm_tag; @@ -103,8 +114,7 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, if (unlikely(!pskb_may_pull(skb, BRCM_TAG_LEN))) return NULL; - /* skb->data points to the EtherType, the tag is right before it */ - brcm_tag = skb->data - 2; + brcm_tag = skb->data - offset; /* The opcode should never be different than 0b000 */ if (unlikely((brcm_tag[0] >> BRCM_OPCODE_SHIFT) & BRCM_OPCODE_MASK)) @@ -126,12 +136,25 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, /* Remove Broadcom tag and update checksum */ skb_pull_rcsum(skb, BRCM_TAG_LEN); + return skb; +} + +static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt) +{ + struct sk_buff *nskb; + + /* skb->data points to the EtherType, the tag is right before it */ + nskb = brcm_tag_rcv_ll(skb, dev, pt, 2); + if (!nskb) + return nskb; + /* Move the Ethernet DA and SA */ - memmove(skb->data - ETH_HLEN, - skb->data - ETH_HLEN - BRCM_TAG_LEN, + memmove(nskb->data - ETH_HLEN, + nskb->data - ETH_HLEN - BRCM_TAG_LEN, 2 * ETH_ALEN); - return skb; + return nskb; } const struct dsa_device_ops brcm_netdev_ops = { |