.\" Copyright (c) Berkeley Software Design, Inc. .\" Copyright (c) 1997, 1998, 1999, 2000 .\" Bill Paul . All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by Bill Paul. .\" 4. Neither the name of the author nor the names of any co-contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF .\" THE POSSIBILITY OF SUCH DAMAGE. .\" .\" $FreeBSD$ .\" .Dd January 31, 2006 .Dt PCN 4 .Os .Sh NAME .Nm pcn .Nd "AMD PCnet/PCI Fast Ethernet device driver" .Sh SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: .Bd -ragged -offset indent .Cd "device miibus" .Cd "device pcn" .Ed .Pp Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : .Bd -literal -offset indent if_pcn_load="YES" .Ed .Sh DESCRIPTION The .Nm driver provides support for PCI Ethernet adapters and embedded controllers based on the AMD PCnet/FAST, PCnet/FAST+, PCnet/FAST III, PCnet/PRO and PCnet/Home Ethernet controller chips. Supported NIC's include the Allied Telesyn AT-2700 family. .Pp The PCnet/PCI chips include a 100Mbps Ethernet MAC and support both a serial and MII-compliant transceiver interface. They use a bus master DMA and a scatter/gather descriptor scheme. The AMD chips provide a mechanism for zero-copy receive, providing good performance in server environments. Receive address filtering is provided using a single perfect filter entry for the station address and a 64-bit multicast hash table. .Pp The .Nm driver supports the following media types: .Pp .Bl -tag -width 10baseTXUTP .It autoselect Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to .Xr rc.conf 5 . .It 10baseT/UTP Set 10Mbps operation. The .Xr ifconfig 8 .Cm mediaopt option can also be used to select either .Sq full-duplex or .Sq half-duplex modes. .It 100baseTX Set 100Mbps (Fast Ethernet) operation. The .Xr ifconfig 8 .Cm mediaopt option can also be used to select either .Sq full-duplex or .Sq half-duplex modes. .El .Pp The .Nm driver supports the following media options: .Pp .Bl -tag -width full-duplex .It full-duplex Force full duplex operation .It half-duplex Force half duplex operation. .El .Pp For more information on configuring this device, see .Xr ifconfig 8 . .Sh HARDWARE The .Nm driver supports adapters and embedded controllers based on the AMD PCnet/FAST, PCnet/FAST+, PCnet/FAST III, PCnet/PRO and PCnet/Home Fast Ethernet chips: .Pp .Bl -bullet -compact .It AMD Am79C971 PCnet-FAST .It AMD Am79C972 PCnet-FAST+ .It AMD Am79C973/Am79C975 PCnet-FAST III .It AMD Am79C976 PCnet-PRO .It AMD Am79C978 PCnet-Home .It Allied-Telesis LA-PCI .It Contec C-NET(98)S (PC-98) .It NEC SV-98/2-B05, B06 .El .Sh DIAGNOSTICS .Bl -diag .It "pcn%d: couldn't map ports/memory" A fatal initialization error has occurred. .It "pcn%d: couldn't map interrupt" A fatal initialization error has occurred. .It "pcn%d: watchdog timeout" The device has stopped responding to the network, or there is a problem with the network connection (e.g.\& a cable fault). .It "pcn%d: no memory for rx list" The driver failed to allocate an mbuf for the receiver ring. .It "pcn%d: no memory for tx list" The driver failed to allocate an mbuf for the transmitter ring when allocating a pad buffer or collapsing an mbuf chain into a cluster. .It "pcn%d: chip is in D3 power state -- setting to D0" This message applies only to adapters which support power management. Some operating systems place the controller in low power mode when shutting down, and some PCI BIOSes fail to bring the chip out of this state before configuring it. The controller loses all of its PCI configuration in the D3 state, so if the BIOS does not set it back to full power mode in time, it will not be able to configure it correctly. The driver tries to detect this condition and bring the adapter back to the D0 (full power) state, but this may not be enough to return the driver to a fully operational condition. If you see this message at boot time and the driver fails to attach the device as a network interface, you will have to perform a warm boot to have the device properly configured. .Pp Note that this condition only occurs when warm booting from another operating system. If you power down your system prior to booting .Fx , the card should be configured correctly. .El .Sh SEE ALSO .Xr arp 4 , .Xr miibus 4 , .Xr netintro 4 , .Xr ng_ether 4 , .Xr ifconfig 8 .Rs .%T AMD PCnet/FAST, PCnet/FAST+ and PCnet/Home datasheets .%O http://www.amd.com .Re .Sh HISTORY The .Nm device driver first appeared in .Fx 4.3 . .Sh AUTHORS The .Nm driver was written by .An Bill Paul Aq wpaul@osd.bsdi.com .