199 lines
7.2 KiB
Groff
199 lines
7.2 KiB
Groff
.\" Copyright (c) 1997, 1998
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.\" Bill Paul <wpaul@ctr.columbia.edu>. 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 Bill Paul.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
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.\" BE 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
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.\" THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 16, 1998
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.Dt XL 4
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.Os FreeBSD
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.Sh NAME
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.Nm xl
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.Nd
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3Com Etherlink XL and Fast Etherlink XL ethernet device driver
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.Sh SYNOPSIS
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.Cd "device miibus"
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.Cd "device xl"
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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 ethernet adapters and embedded
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controllers based on the 3Com "boomerang" and "cyclone" bus-master
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Etherlink XL chips.
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This includes the 3c900-TP, 3c900-COMBO, 3c905-TX,
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3c905-T4, 3c905B-TP, 3c905B-T4 and 3c905B-TX, and embedded 3c905-TX
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and 3c905B-TX ethernet hardware in certain Dell Optiplex and Dell
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Precision desktop machines, and certain Dell Latitude laptop docking
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stations.
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.Pp
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The Etherlink XL chips support built-in 10baseT, 10base2 and 10base5
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transceivers as well as an MII bus for externally attached PHY
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transceivers.
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The 3c905 series typically uses a National Semiconductor
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NS 83840A 10/100 PHY for 10/100 Mbps support in full or half-duplex.
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The 3c905B adapters have built-in autonegotiation logic mapped onto
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the MII for compatibility with previous drivers.
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Fast Etherlink XL
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adapters such as the 3c905-TX and 3c905B-TX are capable of 10 or
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100Mbps data rates in either full or half duplex and can be manually
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configured for any supported mode or automatically negotiate the highest
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possible mode with a link partner.
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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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.Pp
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.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
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.It autoselect
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Enable autoselection of the media type and options.
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Note that this
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option is only available with the 3c905 and 3c905B adapters with
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external PHYs or built-in autonegotiation logic.
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For 3c900 adapters,
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the driver will choose the mode specified in the EEPROM.
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The user can
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change this by adding media options to the
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.Pa /etc/rc.conf
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file.
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.It 10baseT/UTP
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Set 10Mbps operation.
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The
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.Ar mediaopt
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option can also be used to select either
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.Ar full-duplex
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or
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.Ar half-duplex modes.
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.It 100baseTX
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Set 100Mbps (fast ethernet) operation.
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The
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.Ar mediaopt
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option can abso be used to select either
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.Ar full-duplex
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or
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.Ar half-duplex modes.
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.It 10base5/AUI
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Enable AUI transceiver (available only on COMBO cards).
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.It 10base2/BNC
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Enable BNC coax transceiver (available only on COMBO cards).
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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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.Pp
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.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
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.It full-duplex
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Force full duplex operation
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.It half-duplex
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Force half duplex operation.
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.El
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.Pp
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Note that the 100baseTX media type is only available if supported
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by the adapter.
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "xl%d: couldn't map memory"
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A fatal initialization error has occurred.
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.It "xl%d: couldn't map interrupt"
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A fatal initialization error has occurred.
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.It "xl%d: device timeout"
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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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.It "xl%d: no memory for rx list"
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The driver failed to allocate an mbuf for the receiver ring.
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.It "xl%d: no memory for tx list"
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The driver failed to allocate an mbuf for the transmitter ring when
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allocating a pad buffer or collapsing an mbuf chain into a cluster.
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.It "xl%d: command never completed!"
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Some commands issued to the 3c90x ASIC take time to complete: the
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driver is supposed to wait until the 'command in progress' bit in
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the status register clears before continuing.
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In rare instances, this
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bit may not clear.
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To avoid getting caught in an infinite wait loop,
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the driver only polls the bit for a finite number of times before
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giving up, at which point it issues this message.
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This message may
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be printed during driver initialization on slower machines.
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If you
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see this message but the driver continues to function normally, the
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message can probably be ignored.
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.It "xl%d: chip is in D3 power state -- setting to D0"
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This message applies only to 3c905B adapters, which support power
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management.
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Some operating systems place the 3c905B in low power
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mode when shutting down, and some PCI BIOSes fail to bring the chip
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out of this state before configuring it.
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The 3c905B loses all of
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its PCI configuration in the D3 state, so if the BIOS does not set
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it back to full power mode in time, it won't be able to configure it
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correctly.
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The driver tries to detect this condition and bring
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the adapter back to the D0 (full power) state, but this may not be
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enough to return the driver to a fully operational condition.
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If
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you see this message at boot time and the driver fails to attach
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the device as a network interface, you will have to perform second
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warm boot to have the device properly configured.
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.Pp
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Note that this condition only occurs when warm booting from another
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operating system.
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If you power down your system prior to booting
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.Fx ,
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the card should be configured correctly.
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.It "xl%d: WARNING: no media options bits set in the media options register!"
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This warning may appear when using the driver on some Dell Latitude
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docking stations with built-in 3c905-TX adapters.
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For whatever the
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reason, the 'MII available' bit in the media options register on
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this particular equipment is not set, even though it should be (the
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3c905-TX always uses an external PHY transceiver). The driver will
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attempt to guess the proper media type based on the PCI device ID
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word.
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The driver makes a lot of noise about this condition because
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the author considers it a manufacturing defect.
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 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 3.0 .
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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 Bill Paul Aq wpaul@ctr.columbia.edu .
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