xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: fec: Add Scatter/gather support

Browse Source 
Add Scatter/gather support for FEC.
This feature allows to improve outbound throughput performance.

Tested on imx6dl sabresd board:
Running iperf tests shows a 55.4% improvement.

$ ethtool -K eth0 sg off
$ iperf -c 10.192.242.167 -t 3 &
[  3] local 10.192.242.108 port 52618 connected with 10.192.242.167 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 3.0 sec  99.5 MBytes   278 Mbits/sec

$ ethtool -K eth0 sg on
$ iperf -c 10.192.242.167 -t 3 &
[  3] local 10.192.242.108 port 52617 connected with 10.192.242.167 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 3.0 sec   154 MBytes   432 Mbits/sec

CC: Li Frank <B20596@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nimrod Andy
2014-06-12 08:16:22 +08:00
committed by David S. Miller
parent 55d0218ae2
commit 6e909283cb
2 changed files with 215 additions and 99 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/freescale/fec.h
View File

@@ -221,7 +221,7 @@ struct bufdesc_ex {
#define BD_ENET_TX_RCMASK ((ushort)0x003c)
#define BD_ENET_TX_UN ((ushort)0x0002)
#define BD_ENET_TX_CSL ((ushort)0x0001)
#define BD_ENET_TX_STATS ((ushort)0x03ff) /* All status bits */
#define BD_ENET_TX_STATS ((ushort)0x0fff) /* All status bits */
/*enhanced buffer descriptor control/status used by Ethernet transmit*/
#define BD_ENET_TX_INT 0x40000000