Vishal Kulkarni d429005fdf
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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