net: dsa: add Broadcom tag RX/TX handler

Add support for the 4-bytes Broadcom tag that built-in switches such as
the Starfighter 2 might insert when receiving packets, or that we need
to insert while targetting specific switch ports. We use a fake local
EtherType value for this 4-bytes switch tag: ETH_P_BRCMTAG to make sure
we can assign DSA-specific network operations within the DSA drivers.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 18ff53836fe3..7333a4aebb7d 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -451,6 +451,11 @@ dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 		ds->dst->ops = &trailer_netdev_ops;
 		break;
 #endif
+#ifdef CONFIG_NET_DSA_TAG_BRCM
+	case htons(ETH_P_BRCMTAG):
+		ds->dst->ops = &brcm_netdev_ops;
+		break;
+#endif
 	default:
 		ds->dst->ops = &notag_netdev_ops;
 		break;