NAME¶
nge
—
National Semiconductor PCI Gigabit Ethernet adapter
driver
SYNOPSIS¶
To compile this driver into the kernel, place the following lines in your kernel
configuration file:
device miibus
device nge
Alternatively, to load the driver as a module at boot time, place the following
line in
loader.conf(5):
DESCRIPTION¶
The
nge
driver provides support for various
NICs based on the National Semiconductor DP83820 and DP83821 Gigabit Ethernet
controller chips.
The DP83820 supports TBI (ten bit interface) and GMII transceivers, which means
it can be used with either copper or 1000baseX fiber applications. The DP83820
supports TCP/IP checksum offload and VLAN tagging/insertion as well as a
2048-bit multicast hash filter and up to 4 pattern match buffers.
Most cards also use the DP83861 10/100/1000 copper gigabit transceiver chip,
which supports autonegotiation of 10, 100 and 1000Mbps modes in full or half
duplex.
The DP83820 and DP83821 also support 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
nge
driver supports the following media
types:
autoselect
- Enable autoselection of the media type and options. The user can manually
override the autoselected mode by adding media options to
rc.conf(5).
10baseT/UTP
- Set 10Mbps operation. The ifconfig(8)
mediaopt
option can also be used to
select either full-duplex
or
half-duplex
modes.
100baseTX
- Set 100Mbps (Fast Ethernet) operation. The
ifconfig(8)
mediaopt
option can also be used to
select either full-duplex
or
half-duplex
modes.
1000baseTX
- Set 1000baseTX operation over twisted pair.
full-duplex
and
half-duplex
modes are supported.
1000baseSX
- Set 1000Mbps (Gigabit Ethernet) operation. Both
full-duplex
and
half-duplex
modes are supported.
The
nge
driver supports the following media
options:
full-duplex
- Force full duplex operation.
half-duplex
- Force half duplex operation.
For more information on configuring this device, see
ifconfig(8).
HARDWARE¶
The
nge
driver supports National
Semiconductor DP83820 and DP83821 based Gigabit Ethernet adapters including:
- Addtron AEG320T
- Ark PC SOHO-GA2500T (32-bit PCI) and SOHO-GA2000T (64-bit PCI)
- Asante FriendlyNet GigaNIX 1000TA and 1000TPC
- D-Link DGE-500T
- Linksys EG1032, revision 1
- Netgear GA621
- Netgear GA622T
- SMC EZ Card 1000 (SMC9462TX)
- Surecom Technology EP-320G-TX
- Trendware TEG-PCITX (32-bit PCI) and TEG-PCITX2 (64-bit PCI)
SYSCTL VARIABLES¶
The following variables are available as both
sysctl(8) variables and
loader(8) tunables:
- dev.nge.%d.int_holdoff
- Maximum amount of time to delay interrupt processing in units of 100us.
The accepted range is 0 to 255, the default is 1(100us). Value 0
completely disables the interrupt moderation. The interface has to be
brought down and up again before a change takes effect.
DIAGNOSTICS¶
- nge%d: couldn't map memory
- A fatal initialization error has occurred.
- nge%d: couldn't map ports
- A fatal initialization error has occurred.
- nge%d: couldn't map interrupt
- A fatal initialization error has occurred.
- nge%d: no memory for softc struct!
- The driver failed to allocate memory for per-device instance information
during initialization.
- nge%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 bus-master slot.
- nge%d: no memory for jumbo buffers!
- The driver failed to allocate memory for jumbo frames during
initialization.
- nge%d: watchdog timeout
- The device has stopped responding to the network, or there is a problem
with the network connection (cable).
SEE ALSO¶
altq(4),
arp(4),
miibus(4),
netintro(4),
ng_ether(4),
polling(4),
vlan(4),
ifconfig(8)
National Semiconductor DP83820
datasheet,
http://www.national.com.
National Semiconductor DP83861
datasheet,
http://www.national.com.
HISTORY¶
The
nge
device driver first appeared in
FreeBSD 4.4.
AUTHORS¶
The
nge
driver was written by
Bill Paul
⟨wpaul@bsdi.com⟩.