net/mlx5e: Add accelerated RFS support
Implement ndo_rx_flow_steer ndo. A new flow steering rule will be composed from the skb 4-tuple and added to the hardware aRFS flow table. Each rule is stored in an internal hash table, if such skb 4-tuple rule already exists we update the corresponding hardware steering rule with the new destination. For garbage collection rps_may_expire_flow will be invoked for a limited amount of old rules upon any ndo_rx_flow_steer invocation. Signed-off-by: Maor Gottlieb <maorg@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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