e18a29ac35
jumbo frames. PR: 153738 Submitted by: Tom Judge (tom!tomjudge.com) Discussed with: jfv (in part, a long time ago...) MFC after: 1 week
224 lines
6.3 KiB
Groff
224 lines
6.3 KiB
Groff
.\" Copyright (c) 2001-2003, Intel Corporation
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright notice,
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.\" this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" 3. Neither the name of the Intel Corporation nor the names of its
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.\" contributors may be used to endorse or promote products derived from
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.\" this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" * Other names and brands may be claimed as the property of others.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 12, 2012
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.Dt IGB 4
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.Os
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.Sh NAME
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.Nm igb
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.Nd "Intel(R) PRO/1000 PCI Express Gigabit Ethernet adapter 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 line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device igb"
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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_igb_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 provides support for PCI Express Gigabit Ethernet adapters
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based on the Intel 82575 and 82576 Ethernet controller chips.
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The driver supports Transmit/Receive checksum offload and Jumbo
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Frames.
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Furthermore it supports TCP segmentation offload (TSO) on all
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adapters.
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The identification LEDs of the adapters supported by the
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.Nm
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driver can be controlled via the
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.Xr led 4
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API for localization purposes.
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.Pp
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For questions related to hardware requirements, refer to the
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documentation supplied with your Intel PRO/1000 adapter.
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All hardware requirements listed apply to use with
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.Fx .
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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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The maximum MTU size for Jumbo Frames is 9216.
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.Pp
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This driver supports hardware assisted VLANs.
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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 ".Cm 10baseT/UTP"
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.It Cm autoselect
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Enables auto-negotiation for speed and duplex.
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.It Cm 10baseT/UTP
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Sets 10Mbps operation.
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Use the
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.Cm mediaopt
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option to select
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.Cm full-duplex
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mode.
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.It Cm 100baseTX
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Sets 100Mbps operation.
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Use the
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.Cm mediaopt
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option to select
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.Cm full-duplex
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mode.
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.It Cm 1000baseSX
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Sets 1000Mbps operation.
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Only
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.Cm full-duplex
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mode is supported at this speed.
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.It Cm 1000baseTX
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Sets 1000Mbps operation.
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Only
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.Cm full-duplex
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mode is supported at this speed.
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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 full-duplex"
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.It Cm full-duplex
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Forces full-duplex operation
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.It Cm half-duplex
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Forces half-duplex operation.
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.El
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.Pp
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Only use
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.Cm mediaopt
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to set the driver to
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.Cm full-duplex .
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If
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.Cm mediaopt
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is not specified, the driver defaults to
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.Cm half-duplex .
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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 Gigabit Ethernet adapters based on the Intel 82575 and
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82576 controller chips:
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.Pp
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.Bl -bullet -compact
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.It
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Intel Gigabit ET Dual Port Server Adapter (82576)
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.It
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Intel Gigabit VT Quad Port Server Adapter (82575)
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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.igb.rxd
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Number of receive descriptors allocated by the driver.
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The default value is 1024.
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The minimum is 80, and the maximum is 4096.
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.It Va hw.igb.txd
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Number of transmit descriptors allocated by the driver.
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The default value is 1024.
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The minimum is 80, and the maximum is 4096.
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.It Va hw.igb.enable_aim
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If set to 1, enable Adaptive Interrupt Moderation.
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The default is to enable Adaptive Interrupt Moderation.
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.It Va kern.ipc.nmbclusters
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The maximum number of mbuf clusters allowed.
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If the system has more than one igb card or jumbo frames are
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enabled, this value will need to be increased.
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.It Va kern.ipc.nmbjumbo9k
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The maximum number of mbuf 9k jumbo clusters allowed.
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Increasing this to allow for at least 8192 extra clusters
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per interface can allow for an mtu of 8192.
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.El
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.Sh FILES
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.Bl -tag -width /dev/led/igb*
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.It Pa /dev/led/igb*
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identification LED device nodes
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.El
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.Sh EXAMPLES
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Make the identification LED of igb0 blink:
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.Pp
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.Dl "echo f2 > /dev/led/igb0"
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.Pp
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Turn the identification LED of igb0 off again:
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.Pp
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.Dl "echo 0 > /dev/led/igb0"
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "igb%d: Unable to allocate bus resource: memory"
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A fatal initialization error has occurred.
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.It "igb%d: Unable to allocate bus resource: interrupt"
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A fatal initialization error has occurred.
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.It "igb%d: watchdog timeout -- resetting"
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The device has stopped responding to the network, or there is a problem with
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the network connection (cable).
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.El
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.Sh SUPPORT
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For general information and support,
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go to the Intel support website at:
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.Pa http://support.intel.com .
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.Pp
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If an issue is identified with the released source code on the supported kernel
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with a supported adapter, email the specific information related to the
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issue to
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.Aq freebsdnic@mailbox.intel.com .
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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 em 4 ,
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.Xr led 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 4 ,
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.Xr polling 4 ,
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.Xr vlan 4 ,
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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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.Fx 7.1 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Intel Corporation Aq freebsdnic@mailbox.intel.com .
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