On 9/1/2018 5:03 AM, Hauke Mehrtens wrote:
This handles the tag added by the PMAC on the VRX200 SoC line.
The GSWIP uses internally a GSWIP special tag which is located after the
Ethernet header. The PMAC which connects the GSWIP to the CPU converts
this special tag used by the GSWIP into the PMAC special tag which is
added in front of the Ethernet header.
This was tested with GSWIP 2.1 found in the VRX200 SoCs, other GSWIP
versions use slightly different PMAC special tags.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Just one suggestion below, if you need to resubmit this:
[snip]
+static struct sk_buff *gswip_tag_rcv(struct sk_buff *skb,
+ struct net_device *dev,
+ struct packet_type *pt)
+{
+ int port;
+ u8 *gswip_tag;
+
+ if (unlikely(!pskb_may_pull(skb, GSWIP_RX_HEADER_LEN)))
+ return NULL;
+
+ gswip_tag = skb->data - ETH_HLEN;
+ skb_pull_rcsum(skb, GSWIP_RX_HEADER_LEN);
I would be moving this after the port lookup was successful, that way if
you are discarding a frame, you can do this as quickly as possible, this
should not have a functional impact since you return a skb with the
checksum updated past the return of that function.
--
Florian
