net/mlx5: E-Switch, Add support for the sriov offloads mode
Unlike the legacy mode, here, forwarding rules are not learned by the driver per events on macs set by VFs/VMs into their vports, but rather should be programmed by higher-level SW entities. Saying that, still, in the offloads mode (SRIOV_OFFLOADS), two flow groups are created by the driver for management (slow path) purposes: The first group will be used for sending packets over e-switch vports from the host OS where the e-switch management code runs, to be received by VFs. The second group will be used by a miss rule which forwards packets toward the e-switch manager. Further logic will trap these packets such that the receiving net-device as seen by the networking stack is the representor of the vport that sent the packet over the e-switch data-path. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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