diff options
| author | Nimrod Andy <B38611@freescale.com> | 2014-06-12 04:16:23 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-12 22:01:57 +0400 |
| commit | 79f339125ea316e910220e5f5b4ad30370f4de85 (patch) | |
| tree | 51de696840abc67a2f5d5803f63212b2fd593481 /drivers/net/ethernet/freescale/fec.h | |
| parent | 6e909283cb344e32aa8adb4a4c169512d8e5fd27 (diff) | |
| download | linux-79f339125ea316e910220e5f5b4ad30370f4de85.tar.xz | |
net: fec: Add software TSO support
Add software TSO support for FEC.
This feature allows to improve outbound throughput performance.
Tested on imx6dl sabresd board, running iperf tcp tests shows:
- 16.2% improvement comparing with FEC SG patch
- 82% improvement comparing with NO SG & TSO patch
$ ethtool -K eth0 tso on
$ iperf -c 10.192.242.167 -t 3 &
[ 3] local 10.192.242.108 port 35388 connected with 10.192.242.167 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 3.0 sec 181 MBytes 506 Mbits/sec
During the testing, CPU loading is 30%.
Since imx6dl FEC Bandwidth is limited to SOC system bus bandwidth, the
performance with SW TSO is a milestone.
CC: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: David Laight <David.Laight@ACULAB.COM>
CC: Li Frank <B20596@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale/fec.h')
| -rw-r--r-- | drivers/net/ethernet/freescale/fec.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index e7ce14d8d3c3..671d080105a7 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -299,6 +299,12 @@ struct fec_enet_private { unsigned short bufdesc_size; unsigned short tx_ring_size; unsigned short rx_ring_size; + unsigned short tx_stop_threshold; + unsigned short tx_wake_threshold; + + /* Software TSO */ + char *tso_hdrs; + dma_addr_t tso_hdrs_dma; struct platform_device *pdev; |