qede: Postpone reallocation until NAPI end

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During Rx flow driver allocates a replacement buffer each time
it consumes an Rx buffer. Failing to do so, it would consume the
currently processed buffer and re-post it on the ring.
As a result, the Rx ring is always completely full [from driver POV].

We now allow the Rx ring to shorten by doing the re-allocations
at the end of the NAPI run. The only limitation is that we still want to
make sure each time we reallocate that we'd still have sufficient
elements in the Rx ring to guarantee that FW would be able to post
additional data and trigger an interrupt.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Mintz, Yuval 2017-01-01 13:57:04 +02:00 • committed by David S. Miller

parent e1d32acbcb

commit e3eef7ee02

3 changed files with 26 additions and 7 deletions

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7

drivers/net/ethernet/qlogic/qede/qede.h

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23

drivers/net/ethernet/qlogic/qede/qede_fp.c

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3

drivers/net/ethernet/qlogic/qede/qede_main.c

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