161 lines
5.3 KiB
Groff
161 lines
5.3 KiB
Groff
.\" Copyright (c) Berkeley Software Design, Inc.
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.\" Copyright (c) 1997, 1998, 1999, 2000
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.\" Bill Paul <wpaul@osd.bsdi.com>. 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 September 18, 2000
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.Dt PCN 4
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.Os
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.Sh NAME
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.Nm pcn
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.Nd "AMD PCnet/PCI fast ethernet device driver"
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.Sh SYNOPSIS
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.Cd "device miibus"
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.Cd "device pcn"
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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 AMD PCnet/FAST, PCnet/FAST+, PCnet/FAST III,
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PCnet/PRO and PCnet/Home ethernet controller chips.
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.Pp
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The PCnet/PCI chips include a 100Mbps ethernet MAC and support
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both a serial and MII-compliant transceiver interface.
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They use a bus master DMA and a scatter/gather descriptor scheme.
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The AMD chips provide a mechanism for zero-copy receive,
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providing good performance in server environments.
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Receive address filtering is provided using a single perfect filter entry
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for the station address and a 64-bit multicast hash table.
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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 10baseTXUTP
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.It 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 10baseT/UTP
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Set 10Mbps operation.
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The
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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Sq full-duplex
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or
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.Sq half-duplex
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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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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Sq full-duplex
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or
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.Sq half-duplex
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modes.
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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 full-duplex
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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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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 "pcn%d: couldn't map ports/memory"
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A fatal initialization error has occurred.
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.It "pcn%d: couldn't map interrupt"
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A fatal initialization error has occurred.
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.It "pcn%d: watchdog 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 (e.g. a cable fault).
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.It "pcn%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 "pcn%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 "pcn%d: chip is in D3 power state -- setting to D0"
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This message applies only to adapters which support power
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management.
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Some operating systems place the controller 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 controller 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 will not 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 a
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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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.El
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.Sh SEE ALSO
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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 ifconfig 8
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.Rs
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.%T AMD PCnet/FAST, PCnet/FAST+ and PCnet/Home datasheets
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.%O http://www.amd.com
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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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device driver first appeared in
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.Fx 4.3 .
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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@osd.bsdi.com .
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