tree 973f9656be62d80eccb274d6074ddd2438ae9433
parent 6a2fb0e99f9cab349dce0a36862b0cd370036452
author Vivien Didelot <vivien.didelot@savoirfairelinux.com> 1497557688 -0400
committer David S. Miller <davem@davemloft.net> 1497640874 -0400

net: dsa: add cross-chip multicast support

Similarly to how cross-chip VLAN works, define a bitmap of multicast
group members for a switch, now including its DSA ports, so that
multicast traffic can be sent to all switches of the fabric.

A switch may drop the frames if no user port is a member.

This brings support for multicast in a multi-chip environment.
As of now, all switches of the fabric must support the multicast
operations in order to program a single fabric port.

Reported-by: Jason Cobham <jcobham@questertangent.com>
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: Jason Cobham <jcobham@questertangent.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>