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net: dsa: tag_8021q: add support for imprecise RX based on the VBID

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The sja1105 switch can't populate the PORT field of the tag_8021q header
when sending a frame to the CPU with a non-zero VBID.

Similar to dsa_find_designated_bridge_port_by_vid() which performs
imprecise RX for VLAN-aware bridges, let's introduce a helper in
tag_8021q for performing imprecise RX based on the VLAN that it has
allocated for a VLAN-unaware bridge.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean
2022-02-25 11:22:17 +02:00
committed by David S. Miller
parent 91495f21fc
commit d7f9787a76
4 changed files with 55 additions and 13 deletions
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6
include/linux/dsa/8021q.h
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@@ -41,7 +41,11 @@ void dsa_tag_8021q_bridge_leave(struct dsa_switch *ds, int port,
struct sk_buff *dsa_8021q_xmit(struct sk_buff *skb, struct net_device *netdev,
u16 tpid, u16 tci);
void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id);
void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
int *vbid);
struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *master,
int vbid);
u16 dsa_8021q_bridge_tx_fwd_offload_vid(unsigned int bridge_num);