161 lines
4.8 KiB
Groff
161 lines
4.8 KiB
Groff
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.\" Copyright (c) 2009 Pyun YongHyeon
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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
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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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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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 10, 2009
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.Dt ALC 4
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.Os
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.Sh NAME
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.Nm alc
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.Nd Atheros AR8131/AR8132 Gigabit/Fast 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 alc"
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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_alc_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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device driver provides support for Atheros AR8131 PCI Express
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Gigabit Ethernet controllers and Atheros AR8132 PCI Express
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Fast Ethernet controllers.
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.Pp
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All LOMs supported by the
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.Nm
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driver have TCP/UDP/IP checksum offload for transmit, TCP
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segmentation offload (TSO), hardware VLAN tag stripping/insertion
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features, Wake On Lan (WOL) and an interrupt moderation mechanism
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as well as a 64-bit multicast hash filter.
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.Pp
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The AR8131/AR8132 supports Jumbo Frames (up to 9216 bytes), which can
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be configured 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 ".Cm 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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The user can manually override
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the autoselected mode by adding media options to
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.Xr rc.conf 5 .
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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 1000baseTX
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Set 1000baseTX operation over twisted pair.
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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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Force full duplex operation.
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.It Cm half-duplex
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Force half 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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device driver provides support for the following Ethernet controllers:
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.Pp
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.Bl -bullet -compact
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.It
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Atheros AR8131 PCI Express Gigabit Ethernet controller
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.It
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Atheros AR8132 PCI Express Fast Ethernet controller
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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 "xxxxxx"
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.It Va hw.alc.msi_disable
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This tunable disables MSI support on the Ethernet hardware.
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The default value is 0.
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.It Va hw.alc.msix_disable
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This tunable disables MSI-X support on the Ethernet hardware.
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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 variables are available as both
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.Xr sysctl 8
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variables and
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.Xr loader 8
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tunables:
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.Bl -tag -width "xxxxxx"
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.It Va dev.alc.%d.int_rx_mod
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Maximum amount of time to delay receive interrupt processing in
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units of 1us.
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The accepted range is 0 to 130000, the default is 100(100us).
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Value 0 completely disables the interrupt moderation.
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.It Va dev.alc.%d.int_tx_mod
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Maximum amount of time to delay transmit interrupt processing in
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units of 1us.
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The accepted range is 0 to 130000, the default is 50000(50ms).
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Value 0 completely disables the interrupt moderation.
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.It Va dev.alc.%d.process_limit
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Maximum amount of Rx frames to be processed in the event loop before
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rescheduling a taskqueue.
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The accepted range is 32 to 255, the default value is 64 events.
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The interface does not need to be brought down and up again before
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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 miibus 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 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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driver was written by
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.An Pyun YongHyeon
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.Aq yongari@FreeBSD.org .
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It first appeared in
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.Fx 8.0 .
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