diff options
| author |   Intiyaz Basha <intiyaz.basha@cavium.com> | 2017-10-26 16:18:20 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-28 00:35:23 +0900 |
| commit | c859e21a35ce5604dde0b618169680aa3c7e3bdb (patch) | |
| tree | 8361ee7294804a95c28f7b386c03073901fa1146 /drivers/net/ethernet/cavium/liquidio/octeon_nic.c | |
| parent | Merge branch 'ibmvnic-Tunable-parameter-support' (diff) | |
| download | linux-dev-c859e21a35ce5604dde0b618169680aa3c7e3bdb.tar.xz linux-dev-c859e21a35ce5604dde0b618169680aa3c7e3bdb.zip | |
liquidio: xmit_more support
Defer ringing the Tx doorbell if skb->xmit_more is set unless the Tx queue
is full or stopped. To keep latency low, use a deferral limit of 8
packets. We chose 8 because Octeon can fetch at most 8 packets in a single
PCI read, and our tests show that 8 results in low latency.
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Satanand Burla <satananda.burla@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio/octeon_nic.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/octeon_nic.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_nic.c b/drivers/net/ethernet/cavium/liquidio/octeon_nic.c index b457cf23fce6..150609bd8849 100644 --- a/drivers/net/ethernet/cavium/liquidio/octeon_nic.c +++ b/drivers/net/ethernet/cavium/liquidio/octeon_nic.c @@ -82,9 +82,10 @@ octeon_alloc_soft_command_resp(struct octeon_device *oct, } int octnet_send_nic_data_pkt(struct octeon_device *oct, - struct octnic_data_pkt *ndata) + struct octnic_data_pkt *ndata, + int xmit_more) { - int ring_doorbell = 1; + int ring_doorbell = !xmit_more; return octeon_send_command(oct, ndata->q_no, ring_doorbell, &ndata->cmd, ndata->buf, ndata->datasize, |