bnxt_en: Optimize doorbell write operations for newer chips.

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Older chips require the doorbells to be written twice, but newer chips
do not.  Add a new common function bnxt_db_write() to write all
doorbells appropriately depending on the chip.  Eliminating the extra
doorbell on newer chips has a significant performance improvement
on pktgen.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michael Chan 2017-05-29 19:06:08 -04:00 • committed by David S. Miller

parent 3284f9e1ab

commit 434c975a8f

4 changed files with 23 additions and 21 deletions

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30

drivers/net/ethernet/broadcom/bnxt/bnxt.c

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9

drivers/net/ethernet/broadcom/bnxt/bnxt.h

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3

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

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2

drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c

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