NAME¶
nfe
—
NVIDIA nForce MCP Ethernet driver
SYNOPSIS¶
To compile this driver into the kernel, place the following lines in your kernel
configuration file:
device miibus
device nfe
Alternatively, to load the driver as a module at boot time, place the following
line in
loader.conf(5):
DESCRIPTION¶
The
nfe
driver supports PCI Ethernet adapters
based on the NVIDIA nForce Media and Communications Processors (MCP), such as
the nForce, nForce 2, nForce 3, CK804, MCP04, MCP51, MCP55, MCP61, MCP65,
MCP67, MCP73, MCP77 and MCP79 Ethernet controller chips.
Supported features include (hardware support provided):
- Receive/Transmit IP/TCP/UDP checksum offload
- Hardware VLAN tag insertion/stripping
- TCP segmentation offload (TSO)
- MSI/MSI-X
- Jumbo Frames
Support for Jumbo Frames is provided 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.
The
nfe
driver supports the following media
types:
autoselect
- Enable autoselection of the media type and options.
10baseT/UTP
- Set 10Mbps operation.
100baseTX
- Set 100Mbps (Fast Ethernet) operation.
1000baseT
- Set 1000Mbps (Gigabit Ethernet) operation (recent models only).
The
nfe
driver supports the following media
options:
half-duplex
- Force half duplex operation.
full-duplex
- Force full duplex operation.
For more information on configuring this device, see
ifconfig(8).
HARDWARE¶
The
nfe
driver supports the following NVIDIA
MCP onboard adapters:
- NVIDIA nForce MCP Networking Adapter
- NVIDIA nForce MCP04 Networking Adapter
- NVIDIA nForce 430 MCP12 Networking Adapter
- NVIDIA nForce 430 MCP13 Networking Adapter
- NVIDIA nForce MCP51 Networking Adapter
- NVIDIA nForce MCP55 Networking Adapter
- NVIDIA nForce MCP61 Networking Adapter
- NVIDIA nForce MCP65 Networking Adapter
- NVIDIA nForce MCP67 Networking Adapter
- NVIDIA nForce MCP73 Networking Adapter
- NVIDIA nForce MCP77 Networking Adapter
- NVIDIA nForce MCP79 Networking Adapter
- NVIDIA nForce2 MCP2 Networking Adapter
- NVIDIA nForce2 400 MCP4 Networking Adapter
- NVIDIA nForce2 400 MCP5 Networking Adapter
- NVIDIA nForce3 MCP3 Networking Adapter
- NVIDIA nForce3 250 MCP6 Networking Adapter
- NVIDIA nForce3 MCP7 Networking Adapter
- NVIDIA nForce4 CK804 MCP8 Networking Adapter
- NVIDIA nForce4 CK804 MCP9 Networking Adapter
LOADER TUNABLES¶
Tunables can be set at the
loader(8) prompt before
booting the kernel or stored in
loader.conf(5).
- hw.nfe.msi_disable
- Whether or not MSI support is enabled in the driver. The default value is
0.
- hw.nfe.msix_disable
- Whether or not MSI-X support is enabled in the driver. The default value
is 0.
SYSCTL VARIABLES¶
The following
sysctl(8) variables can be used to
modify or monitor
nfe
behavior.
- dev.nfe.%d.process_limit
- Maximum number of Rx events to be processed in the event loop before
rescheduling a taskqueue. The accepted range is 50 to 255, the default
value is 192. The interface does not need to be brought down and up again
before a change takes effect.
SEE ALSO¶
altq(4),
arp(4),
intro(4),
miibus(4),
netintro(4),
pci(4),
polling(4),
rgephy(4),
sysctl(8),
ifconfig(8)
HISTORY¶
The
nfe
device driver first appeared in
OpenBSD 3.9, and then in
FreeBSD
7.0.
AUTHORS¶
The
nfe
driver was written by
Jonathan Gray
⟨jsg@openbsd.org⟩ and
Damien
Bergamini ⟨damien@openbsd.org⟩. The
nfe
driver was ported to
FreeBSD by
Shigeaki
Tagashira ⟨shigeaki@se.hiroshima-u.ac.jp⟩.