GX(4) BSD Kernel Interfaces Manual GX(4)
gx -- Intel PRO/1000 Gigabit Ethernet driver
The gx driver provides support for NICs based on the Intel 82542 and
82543 Gigabit Ethernet controller chips. Both fiber and copper variants
of the cards are supported.
The 82542 supports TBI (ten bit interface), while the 82543 supports the
GMII transceivers, which means it can be used with either copper or
1000baseX fiber applications. Both boards support VLAN tagging/insertion
and the 82543 additionally supports TCP/IP checksum offload.
The 82543-T cards use the Marvell 10/100/1000 copper gigabit transceiver
chip, which supports autonegotiation of 10, 100 and 1000Mbps modes in
full or half duplex, however half duplex 1000Mbps is not supported.
The driver also supports jumbo frames, which can be configured via the
interface MTU setting. Selecting an MTU larger than 1500 bytes with the
ifconfig(8) utility configures the adapter to receive and transmit jumbo
frames. Using jumbo frames can greatly improve performance for certain
tasks, such as file transfers and data streaming.
The gx driver supports the following media types:
autoselect Enable autoselection of the media type and options. User
can manually override the autoselected mode by adding media
options to rc.conf(5).
10baseT/UTP Set 10Mbps operation. The ifconfig(8)'s mediaopt option can
also be used to select either full-duplex or half-duplex
100baseTX Set 100Mbps (Fast Ethernet) operation. The ifconfig(8)'s
mediaopt option can also be used to select either
full-duplex or half-duplex modes.
1000baseTX Set 1000baseTX operation over twisted pair. Only
full-duplex mode is supported.
The gx driver supports the following media options:
full-duplex Force full duplex operation.
half-duplex Force half duplex operation.
The gx driver also supports one special link option for 1000baseTX cards:
link0 With 1000baseTX cards, establishing a link between two ports
requires that one port be configured as a master and the other a
slave. With autonegotiation, the master/slave settings should be
chosen automatically. Setting the link0 flag with ifconfig(8)
will force the link up instead.
For more information on configuring this device, see ifconfig(8).
The gx driver supports Gigabit Ethernet adapters based on the Intel 82542
and 82543 controller chips:
o Intel PRO/1000 Gigabit Server Adapter (82542)
o Intel PRO/1000 F Server Adapter (82543)
o Intel PRO/1000 T Server Adapter (82543)
gx%d: couldn't map memory A fatal initialization error has occurred.
gx%d: couldn't map interrupt A fatal initialization error has occurred.
gx%d: couldn't setup irq A fatal initialization error has occurred.
gx%d: failed to read station address A fatal initialization error has
gx%d: no memory for list buffers! The driver failed to allocate memory
for per-device instance information during initialization.
gx%d: failed to enable memory mapping! The driver failed to initialize
PCI shared memory mapping. This might happen if the card is not in a
gx%d: GMII/MII, PHY not detected The MII probe routines failed to detect
the PHY. This might happen if miibus is not configured.
gx%d: watchdog timeout The device has stopped responding to the network,
or there is a problem with the network connection (cable).
gx%d: mbuf allocation failed -- packet dropped The driver could not
allocate a mbuf for the receive ring.
gx%d: cluster allocation failed -- packet dropped The driver could not
allocate a mbuf cluster for the receive ring.
gx%d: link down The link status changed from up to down.
gx%d: link up The link status changed from down to up.
arp(4), em(4), miibus(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)
The gx device driver first appeared in FreeBSD 4.5.
The gx driver was written by Jonathan Lemon <jlemonATFreeBSD.org>.
BSD September 5, 2004 BSD