153 lines
4.5 KiB
Groff
153 lines
4.5 KiB
Groff
.\" Copyright (c) 2010 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 December 30, 2010
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.Dt VTE 4
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.Os
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.Sh NAME
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.Nm vte
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.Nd Vortex86 RDC R6040 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 vte"
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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_vte_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 RDC R6040 Fast Ethernet controller
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which is commonly found on Vortex86 System On a Chip (SoC).
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.Pp
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The RDC R6040 has integrated 10/100 PHY for 10/100Mbps support in full
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or half-duplex.
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The controller supports interrupt moderation mechanism, a 64-bit multicast
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hash filter, VLAN over-size frame and four station addresses.
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The
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.Nm
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device driver uses three station addresses out of four as perfect
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multicast filter.
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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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.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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DM&P Vortex86 RDC R6040 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.vte.tx_deep_copy
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The RDC R6040 controller has no auto-padding support for short
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frames and the controller's DMA engine does not have capability to
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handle multiple buffers for a TX frame such that driver has to
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create a single contiguous TX buffer.
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This hardware limitation leads to poor TX performance since most of
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CPU cycles are wasted on both de-fragmenting mbuf chains and padding.
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This tunable enables deep copy operation for TX frames such that
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driver will spend less CPU cycles in de-fragmentation with the
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cost of extra TX buffer memory.
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The default value is 1 to use deep copy.
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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.vte.%d.rx_mod
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Maximum number of packets to fire RX completion interrupt.
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The accepted range is 0 to 15, the default is 15.
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.It Va dev.vte.%d.tx_mod
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Maximum number of packets to fire TX completion interrupt.
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The accepted range is 0 to 15, the default is 15.
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.It Va dev.vte.%d.stats
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Show hardware MAC statistics maintained in driver.
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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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.Rs
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.%T "DM&P Electronics Inc. Vortex86"
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.%U http://www.dmp.com.tw
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.Re
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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 8.3 .
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