diff options
| author | Michael Chan <michael.chan@broadcom.com> | 2017-05-30 02:06:08 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-31 01:14:07 +0300 |
| commit | 434c975a8fe2f70b70ac09ea5ddd008e0528adfa (patch) | |
| tree | b367d8a53e1f40dd4c7b34aa1c381eea17c9337a /drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | |
| parent | 3284f9e1ab505b41fa604c81e4b3271c6b88cdcb (diff) | |
| download | linux-434c975a8fe2f70b70ac09ea5ddd008e0528adfa.tar.xz | |
bnxt_en: Optimize doorbell write operations for newer chips.
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>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index 11ddf0adc6e1..fd1181510b65 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -2376,8 +2376,7 @@ static int bnxt_run_loopback(struct bnxt *bp) /* Sync BD data before updating doorbell */ wmb(); - writel(DB_KEY_TX | txr->tx_prod, txr->tx_doorbell); - writel(DB_KEY_TX | txr->tx_prod, txr->tx_doorbell); + bnxt_db_write(bp, txr->tx_doorbell, DB_KEY_TX | txr->tx_prod); rc = bnxt_poll_loopback(bp, pkt_size); dma_unmap_single(&bp->pdev->dev, map, pkt_size, PCI_DMA_TODEVICE); |