VGE(4) | Device Drivers Manual | VGE(4) |
vge
—
vge* at pci? dev ? function ?
Configuration of PHYs is also necessary. See mii(4).
vge
driver provides support for various NICs and
embedded Ethernet interfaces based on the VIA Networking Technologies VT6122
Gigabit Ethernet controller chips.
The VT6122 is a 33/66Mhz 64-bit PCI device which combines a tri-speed MAC with an integrated 10/100/1000 copper PHY. (Some older cards use an external PHY.) The MAC supports TCP/IP hardware checksums (IPv4 only), TCP large send, VLAN tag insertion and stripping, as well as VLAN filtering, a 64-entry CAM filter and a 64-entry VLAN filter, 64-bit multicast hash filter, 4 separate transmit DMA queues, flow control and jumbo frames up to 16K in size. The VT6122 has a 16K receive FIFO and 48K transmit FIFO.
The vge
driver takes advantage of the
VT6122's checksum offload and VLAN tagging features, as well as the jumbo
frame and CAM filter support. The CAM filter is used for multicast address
filtering to provide 64 perfect multicast address filter support. If it is
necessary for the interface to join more than 64 multicast groups, the
driver will switch over to using the hash filter.
The jumbo frame support can be enabled by setting the interface MTU to any value larger than the default of 1500 bytes, up to a maximum of 9000 bytes. The receive and transmit checksum offload support can be toggled on and off using the ifconfig(8) utility.
The vge
driver supports the following
media types:
autoselect
10baseT/UTP
mediaopt
option can also be used to select either
full-duplex
or half-duplex
modes.100baseTX
mediaopt
option can also be used to select either
full-duplex
or half-duplex
modes.1000baseTX
mediaopt
option can also be used to select either
full-duplex
or half-duplex
modes.The vge
driver supports the following
media options:
full-duplex
half-duplex
The vge
driver also supports one special
link option for 1000baseTX cards:
link0
vge
driver configures the ports as slaves by
default. Setting the link0
flag with
ifconfig(8) will set a
port as a master instead.For more information on configuring this device, see ifconfig(8).
vge
driver supports VIA Networking VT3119 and VT6122
based Gigabit Ethernet adapters including:
vge
device driver first appeared in
FreeBSD 5.3 and then in NetBSD
3.0.
vge
driver was written by Bill
Paul
<wpaul@windriver.com>.
The NetBSD port was done by Jaromir
Dolecek ⟨jdolecek@NetBSD.org⟩.
March 5, 2005 | NetBSD 9.4 |