103 lines
3.5 KiB
Groff
103 lines
3.5 KiB
Groff
.\"
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.\" Copyright (c) 1996, Fred Gray
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by David Greenman.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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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 January 15, 1996
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.Dt VX 4 i386
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.Os
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.Sh NAME
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.Nm vx
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.Nd
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PCI Ethernet device driver
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.Sh SYNOPSIS
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.Cd "device vx0"
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.Sh DESCRIPTION
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The
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.Nm vx
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driver provides support for the 3Com 3c590 and 3c595 EtherLink III and Fast
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EtherLink III PCI Ethernet cards in 10 Mbps mode. The medium selection
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can be influenced by the following link flags to the
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.Xr ifconfig 8
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command:
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.Pp
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.Bl -tag -width LINK0X -compact
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.It Em link0
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Use the AUI port.
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.It Em link1
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Use the BNC port.
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.It Em link2
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Use the UTP port.
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "vx%d: not configured; kernel is built for only %d devices."
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There are not enough devices in the kernel configuration file for the number
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of adapters present in the system. Add devices to the configuration file,
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rebuild the kernel, and reboot.
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.Pp
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All other diagnostics indicate either a hardware problem or a bug in the
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driver.
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.Sh CAVEATS
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Some early-revision 3c590 cards are defective and suffer from many receive
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overruns, which cause lost packets. The author has attempted to implement
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a test for it based on the information supplied by 3Com, but the test resulted
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mostly in spurious warnings.
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.Pp
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The performance of this driver is somewhat limited by the fact that it uses
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only polled-mode I/O and does not make use of the bus-mastering capability
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of the cards.
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.Sh BUGS
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The
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.Nm vx
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driver is known not to reset the adapter correctly following a warm boot
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on some systems.
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.Pp
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The
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.Nm vx
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driver has not been exhaustively tested with all the models of cards that it
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claims to support.
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.Sh HISTORY
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The
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.Nm vx
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device driver first appeared in
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.Fx 2.1 .
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It was derived from the
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.Nm ep
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driver, from which it inherits most of its limitations.
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.Sh AUTHORS
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The
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.Nm vx
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device driver and this manual page were written by
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.An Fred Gray Aq fgray@rice.edu ,
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based on the work of
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.An Herb Peyerl
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and with the assistance of numerous others.
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