The cpsw driver did not support the IFF_ALLMULTI flag which makes dynamic
multicast routing not work.  Related to this, when enabling IFF_PROMISC
in switch mode, all registered multicast addresses are flushed, resulting
in only broadcast and unicast traffic being received.

A new cpsw_ale_set_allmulti function now scans through the ALE entry
table and adds/removes the host port from the unregistered multicast
port mask of each vlan entry depending on the state of IFF_ALLMULTI.
In promiscious mode, cpsw_ale_set_allmulti is used to force reception
of all multicast traffic in addition to the unicast and broadcast traffic.

With this change dynamic multicast and promiscious mode both work in
switch mode.
Signed-off-by: NLen Sorensen <lsorense@csclub.uwaterloo.ca>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support to view addresses added by the driver and learnt by the
hardware from ALE table via ethtool register dump interface.
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Enable promiscuous mode support for CPSW.
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use possibly more efficient ether_addr_equal
to instead of memcmp.

Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add helper functions for VLAN ALE implementations for Add, Delete
Dump VLAN related ALE entries
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding multicast address to ALE table via netdev ops to subscribe, transmit
or receive multicast frames to and from the network
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

TI CPSW ethernet switch has a built-in address lookup engine.  This patch adds
the code necessary for programming this module.
Signed-off-by: NCyril Chemparathy <cyril@ti.com>
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>