cxgb4/cxgb4vf: Add support for SGE doorbell queue timer
T6 introduced a Timer Mechanism in SGE called the SGE Doorbell Queue Timer. With this we can now configure TX Queues to get CIDX Updates when: Time(CIDX == PIDX) >= Timer Previously we rely on TX Queue Status Page updates by hardware for DMA completions. This will make Hardware/Firmware actually deliver the CIDX Updates as Ingress Queue messages with commensurate Interrupts. So we now have a new RX Path component for processing CIDX Updates and reclaiming TX Descriptors faster. Original work by: Casey Leedom <leedom@chelsio.com> Signed-off-by:Vishal Kulkarni <vishal@chelsio.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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