203 lines
4.8 KiB
Groff
203 lines
4.8 KiB
Groff
.\" $OpenBSD: nfe.4,v 1.7 2006/02/28 08:13:47 jsg Exp $
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.\"
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.\" Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 2, 2008
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.Dt NFE 4
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.Os
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.Sh NAME
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.Nm nfe
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.Nd "NVIDIA nForce MCP Ethernet driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device miibus"
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.Cd "device nfe"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_nfe_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver supports PCI Ethernet adapters based on the NVIDIA
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nForce Media and Communications Processors (MCP), such as
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the nForce, nForce 2, nForce 3, CK804, MCP04, MCP51, MCP55,
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MCP61, MCP65, MCP67, MCP73, MCP77 and MCP79 Ethernet
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controller chips.
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.Pp
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Supported features include (hardware support provided):
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.Pp
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.Bl -bullet -compact
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.It
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Receive/Transmit IP/TCP/UDP checksum offload
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.It
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Hardware VLAN tag insertion/stripping
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.It
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TCP segmentation offload (TSO)
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.It
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MSI/MSI-X
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.It
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Jumbo Frames
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.El
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.Pp
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Support for Jumbo Frames is provided via the interface MTU setting.
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Selecting an MTU larger than 1500 bytes with the
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.Xr ifconfig 8
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utility configures the adapter to receive and transmit Jumbo Frames.
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.Pp
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The
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.Nm
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driver supports the following media types:
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.Bl -tag -width "10baseT/UTP"
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.It Cm autoselect
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Enable autoselection of the media type and options.
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.It Cm 10baseT/UTP
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Set 10Mbps operation.
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.It Cm 100baseTX
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Set 100Mbps (Fast Ethernet) operation.
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.It Cm 1000baseT
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Set 1000Mbps (Gigabit Ethernet) operation (recent models only).
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.El
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.Pp
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The
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.Nm
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driver supports the following media options:
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.Bl -tag -width ".Cm 10baseT/UTP"
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.It Cm half-duplex
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Force half duplex operation.
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.It Cm full-duplex
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Force full duplex operation.
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.El
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh HARDWARE
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The
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.Nm
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driver supports the following NVIDIA MCP onboard adapters:
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.Pp
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.Bl -bullet -compact
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.It
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NVIDIA nForce MCP Networking Adapter
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.It
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NVIDIA nForce MCP04 Networking Adapter
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.It
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NVIDIA nForce 430 MCP12 Networking Adapter
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.It
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NVIDIA nForce 430 MCP13 Networking Adapter
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.It
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NVIDIA nForce MCP51 Networking Adapter
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.It
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NVIDIA nForce MCP55 Networking Adapter
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.It
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NVIDIA nForce MCP61 Networking Adapter
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.It
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NVIDIA nForce MCP65 Networking Adapter
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.It
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NVIDIA nForce MCP67 Networking Adapter
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.It
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NVIDIA nForce MCP73 Networking Adapter
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.It
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NVIDIA nForce MCP77 Networking Adapter
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.It
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NVIDIA nForce MCP79 Networking Adapter
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.It
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NVIDIA nForce2 MCP2 Networking Adapter
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.It
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NVIDIA nForce2 400 MCP4 Networking Adapter
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.It
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NVIDIA nForce2 400 MCP5 Networking Adapter
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.It
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NVIDIA nForce3 MCP3 Networking Adapter
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.It
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NVIDIA nForce3 250 MCP6 Networking Adapter
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.It
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NVIDIA nForce3 MCP7 Networking Adapter
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.It
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NVIDIA nForce4 CK804 MCP8 Networking Adapter
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.It
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NVIDIA nForce4 CK804 MCP9 Networking Adapter
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.El
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.Sh LOADER TUNABLES
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Tunables can be set at the
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.Xr loader 8
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prompt before booting the kernel or stored in
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.Xr loader.conf 5 .
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.Bl -tag -width indent
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.It Va hw.nfe.msi_disable
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Whether or not MSI support is enabled in the driver.
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The default value is 0.
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.It Va hw.nfe.msix_disable
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Whether or not MSI-X support is enabled in the driver.
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The default value is 0.
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.El
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.Sh SYSCTL VARIABLES
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The following
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.Xr sysctl 8
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variables can be used to modify or monitor
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.Nm
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behavior.
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.Bl -tag -width indent
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.It Va dev.nfe.%d.process_limit
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Maximum number of Rx events to be processed in the event loop
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before rescheduling a taskqueue.
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The accepted range is 50 to 255, the default value is 192.
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The interface does not need to be brought down and up again
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before a change takes effect.
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.El
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.Sh SEE ALSO
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.Xr altq 4 ,
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.Xr arp 4 ,
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.Xr intro 4 ,
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.Xr miibus 4 ,
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.Xr netintro 4 ,
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.Xr pci 4 ,
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.Xr polling 4 ,
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.Xr sysctl 8 ,
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Ox 3.9 ,
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and then in
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.Fx 7.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Jonathan Gray
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.Aq jsg@openbsd.org
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and
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.An Damien Bergamini
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.Aq damien@openbsd.org .
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The
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.Nm
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driver was ported to
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.Fx
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by
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.An Shigeaki Tagashira
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.Aq shigeaki@se.hiroshima-u.ac.jp .
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