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net: dsa: point out the tail taggers 

The Marvell 88E6060 uses tag_trailer.c and the KSZ8795, KSZ9477 and
KSZ9893 switches also use tail tags.

Tell that to the DSA core, since this makes a difference for the flow
dissector. Most switches break the parsing of frame headers, but these
ones don't, so no flow dissector adjustment needs to be done for them.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2020-09-26 22:32:07 +03:00 committed by David S. Miller
parent 9790cf20a8
commit 7a6ffe764b
3 changed files with 3 additions and 0 deletions
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1
include/net/dsa.h
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@ -90,6 +90,7 @@ struct dsa_device_ops {
* its RX filter. * its RX filter.
*/ */
bool promisc_on_master; bool promisc_on_master;
bool tail_tag;
}; };
/* This structure defines the control interfaces that are overlayed by the /* This structure defines the control interfaces that are overlayed by the

1
net/dsa/tag_ksz.c
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@ -237,6 +237,7 @@ static const struct dsa_device_ops ksz9893_netdev_ops = {
.xmit = ksz9893_xmit, .xmit = ksz9893_xmit,
.rcv = ksz9477_rcv, .rcv = ksz9477_rcv,
.overhead = KSZ_INGRESS_TAG_LEN, .overhead = KSZ_INGRESS_TAG_LEN,
.tail_tag = true,
}; };
DSA_TAG_DRIVER(ksz9893_netdev_ops); DSA_TAG_DRIVER(ksz9893_netdev_ops);

1
net/dsa/tag_trailer.c
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@ -83,6 +83,7 @@ static const struct dsa_device_ops trailer_netdev_ops = {
.xmit = trailer_xmit, .xmit = trailer_xmit,
.rcv = trailer_rcv, .rcv = trailer_rcv,
.overhead = 4, .overhead = 4,
.tail_tag = true,
}; };
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");