e5a9fd5435
the Davicom DM9100 and DM9102 chipsets, including the Jaton Corporation XPressNet. Datasheet is available from www.davicom8.com. The DM910x chips are still more tulip clones. The API is reproduced pretty faithfully, unfortunately the performance is pretty bad. The transmitter seems to have a lot of problems DMAing multi-fragment packets. The only way to make it work reliably is to coalesce transmitted packets into a single contiguous buffer. The Linux driver (written by Davicom) actually does something similar to this. I can't recomment this NIC as anything more than a "connectivity solution." This driver uses newbus and miibus and is supported on both i386 and alpha platforms.
151 lines
5.2 KiB
Groff
151 lines
5.2 KiB
Groff
.\" Copyright (c) 1997, 1998, 1999
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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 September 4, 1999
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.Dt DM 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm dm
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.Nd
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Davicom DM9100/DM9102 fast ethernet device driver
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.Sh SYNOPSIS
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.Cd "controller miibus0"
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.Cd "device dm0"
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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 Davicom DM9100 and DM9102 PCI
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fast ethernet controller chips including the Jaton Corporation
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XPressNet.
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.Pp
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The DM9100 and DM9102 are designed to be DEC 21x4x workalikes. The
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register layout, DMA descriptor scheme and receive filter programming
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are identical to the DEC part. The DM9102
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is a 100Mbps ethernet MAC and MII-compliant transceiver
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in a single package. The DM9100 is similar to the DM9102 except
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that it has no internal PHY, requiring instead an external transceiver
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to be attached to its MII interface.
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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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The user can manually override
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the autoselected mode by adding media options to the
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.Pa /etc/rc.conf
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fine.
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.It 10baseT/UTP
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Set 10Mbps operation. 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. 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
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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 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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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 "dm%d: couldn't map ports/memory"
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A fatal initialization error has occurred.
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.It "dm%d: couldn't map interrupt"
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A fatal initialization error has occurred.
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.It "dm%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 (cable).
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.It "dm%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 "dm%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 cludmr.
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.It "dm%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. Some operating sydmms 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. 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 won't be able to configure it
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correctly. 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. 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 sydmm. If you power down your sydmm 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 netintro 4 ,
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.Xr ifconfig 8
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.Rs
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.%T Davicom DM9102 datasheet
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.%O http://www.davicom8.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 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@ee.columbia.edu .
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