Ventana Ethernet

The Ventana Family of SBC's has different configurations of ethernet ports across the family.

see also ethernet

Hardware Configuration

Board	Configuration	eth0	eth1
GW51xx	Single GigE	IMX6 FEC	-
GW52xx	Single GigE	IMX6 FEC	-
GW53xx	Dual GigE	IMX6 FEC (J16)	Marvell SKY2 or Intel i210 on rev. -G or greater (J17)
GW54xx	Dual GigE	IMX6 FEC (J19)	Marvell SKY2 or Intel i210 on rev. -G or greater (J20)
GW552x	Dual GigE	Intel I210 (J12)	Intel I210 (J9)

Drivers and throughput

Here are some notes on the various Linux drivers that support the Gigabit Ethernet ports discussed above:

• Freescale FEC MAC:
  • Used on the GW51xx,GW52xx,GW53xx,GW54xx, GW5913, GW5910 (Port 1 on boards with 2 ports)
  • ​i.MX6 errata: ERR004512 discusses a throughput limitation limiting the device to appx 470mbps
  • ​fec linux driver
  • hardware supports common hardware accelerations such as NAPI, checksum offload, and jumbo frames. The driver used in the Yocto and OpenWrt 16.01 BSPs support this, yet the upstream driver used in OpenWrt 14.08 does not.
• Marvell Yukon2 MAC/PHY:
  • Used on GW54xx,GW53xx prior to rev. -G (Port 2 on boards with 2 ports)
  • ​sky2 linux driver
  • hardware and driver appear to support common hardware accelerations such as NAPI, checksum offload, and jumbo frames
• Intel i210 MAC/PHY
  • Used on GW552x,GW54xx,GW53xx
  • ​igb linux driver
  • hardware and driver appear to support common hardware accelerations such as NAPI, checksum offload, and jumbo frames

Throughput test results:

NIC	Software	Throughput(UDP/TCP) Mbps
		TX	RX
IMX6 FEC	yocto 1.8 (gw 3.14.48)	406/423	493/588
Intel I210	yocto 1.8 (gw 3.14.48)	943/599	503/607
Marvell SKY2	yocto 1.8 (gw 3.14.48)	829/648	730/615
IMX6 FEC	OpenWrt 14.08 (3.14.16)	270/317	495/439
Intel I210	OpenWrt 14.08 (3.14.16)	941/600	630/411
Marvell SKY2	OpenWrt 14.08 (3.14.16)	871/480	670/485
IMX6 FEC	OpenWrt 16.02 (4.4.0)	394/392	530/560
Intel I210	OpenWrt 16.02 (4.4.0)	940/680	870/758
Marvell SKY2	OpenWrt 16.02 (4.4.0)	794/534	862/878
IMX6 FEC	OpenWrt 18.0x (4.14.0)	436/416	599/567
Marvell SKY2	OpenWrt 18.0x (4.14.0)	713/818	814/941

• test results using iperf3 with iptables/ebtables modules removed where applicable