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net: dsa: add Broadcom tag RX/TX handler

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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>
This commit is contained in:
Florian Fainelli 2014-08-27 17:04:55 -07:00 • committed by David S. Miller
parent ce31b31c68
commit 5037d532b8
6 changed files with 190 additions and 0 deletions
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5
net/dsa/slave.c
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@ -450,6 +450,11 @@ dsa_slave_create(struct dsa_switch *ds, struct device *parent,
case htons(ETH_P_TRAILER):
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;