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| author | Vladimir Oltean <olteanv@gmail.com> | 2019-05-02 23:23:34 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-05-03 10:49:17 -0400 |
| commit | 6666cebc5e306f49a25bd20aa8c1cb8ef8950df5 (patch) | |
| tree | feac9879b812fff6394bba7c875007002847a759 /include/linux/dsa | |
| parent | bf5bc3ce8a8f32a0d45b6820ede8f9fc3e9c23df (diff) | |
| download | lwn-6666cebc5e306f49a25bd20aa8c1cb8ef8950df5.tar.gz lwn-6666cebc5e306f49a25bd20aa8c1cb8ef8950df5.zip | |
net: dsa: sja1105: Add support for VLAN operations
VLAN filtering cannot be properly disabled in SJA1105. So in order to
emulate the "no VLAN awareness" behavior (not dropping traffic that is
tagged with a VID that isn't configured on the port), we need to hack
another switch feature: programmable TPID (which is 0x8100 for 802.1Q).
We are reprogramming the TPID to a bogus value which leaves the switch
thinking that all traffic is untagged, and therefore accepts it.
Under a vlan_filtering bridge, the proper TPID of ETH_P_8021Q is
installed again, and the switch starts identifying 802.1Q-tagged
traffic.
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/dsa')
| -rw-r--r-- | include/linux/dsa/sja1105.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/dsa/sja1105.h b/include/linux/dsa/sja1105.h index 30559d1d0e1b..abf3977e34fd 100644 --- a/include/linux/dsa/sja1105.h +++ b/include/linux/dsa/sja1105.h @@ -7,6 +7,10 @@ #ifndef _NET_DSA_SJA1105_H #define _NET_DSA_SJA1105_H +#include <linux/etherdevice.h> + +#define ETH_P_SJA1105 ETH_P_DSA_8021Q + /* The switch can only be convinced to stay in unmanaged mode and not trap any * link-local traffic by actually telling it to filter frames sent at the * 00:00:00:00:00:00 destination MAC. |