1.\" Copyright (c) Berkeley Software Design, Inc. 2.\" Copyright (c) 1997, 1998, 1999, 2000 3.\" Bill Paul <wpaul@osd.bsdi.com>. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. All advertising materials mentioning features or use of this software 14.\" must display the following acknowledgement: 15.\" This product includes software developed by Bill Paul. 16.\" 4. Neither the name of the author nor the names of any co-contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 24.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30.\" THE POSSIBILITY OF SUCH DAMAGE. 31.\" 32.\" $FreeBSD$ 33.\" 34.Dd January 31, 2006 35.Dt PCN 4 36.Os 37.Sh NAME 38.Nm pcn 39.Nd "AMD PCnet/PCI Fast Ethernet device driver" 40.Sh SYNOPSIS 41To compile this driver into the kernel, 42place the following lines in your 43kernel configuration file: 44.Bd -ragged -offset indent 45.Cd "device miibus" 46.Cd "device pcn" 47.Ed 48.Pp 49Alternatively, to load the driver as a 50module at boot time, place the following line in 51.Xr loader.conf 5 : 52.Bd -literal -offset indent 53if_pcn_load="YES" 54.Ed 55.Sh DESCRIPTION 56The 57.Nm 58driver provides support for PCI Ethernet adapters and embedded 59controllers based on the AMD PCnet/FAST, PCnet/FAST+, PCnet/FAST III, 60PCnet/PRO and PCnet/Home Ethernet controller chips. 61Supported NIC's include the Allied Telesyn AT-2700 family. 62.Pp 63The PCnet/PCI chips include a 100Mbps Ethernet MAC and support 64both a serial and MII-compliant transceiver interface. 65They use a bus master DMA and a scatter/gather descriptor scheme. 66The AMD chips provide a mechanism for zero-copy receive, 67providing good performance in server environments. 68Receive address filtering is provided using a single perfect filter entry 69for the station address and a 64-bit multicast hash table. 70.Pp 71The 72.Nm 73driver supports the following media types: 74.Bl -tag -width 10baseTXUTP 75.It autoselect 76Enable autoselection of the media type and options. 77The user can manually override 78the autoselected mode by adding media options to 79.Xr rc.conf 5 . 80.It 10baseT/UTP 81Set 10Mbps operation. 82The 83.Xr ifconfig 8 84.Cm mediaopt 85option can also be used to select either 86.Sq full-duplex 87or 88.Sq half-duplex 89modes. 90.It 100baseTX 91Set 100Mbps (Fast Ethernet) operation. 92The 93.Xr ifconfig 8 94.Cm mediaopt 95option can also be used to select either 96.Sq full-duplex 97or 98.Sq half-duplex 99modes. 100.El 101.Pp 102The 103.Nm 104driver supports the following media options: 105.Bl -tag -width full-duplex 106.It full-duplex 107Force full duplex operation. 108.It half-duplex 109Force half duplex operation. 110.El 111.Pp 112For more information on configuring this device, see 113.Xr ifconfig 8 . 114.Sh HARDWARE 115The 116.Nm 117driver supports adapters and embedded controllers based on the AMD PCnet/FAST, 118PCnet/FAST+, PCnet/FAST III, PCnet/PRO and PCnet/Home Fast Ethernet chips: 119.Pp 120.Bl -bullet -compact 121.It 122AMD Am79C971 PCnet-FAST 123.It 124AMD Am79C972 PCnet-FAST+ 125.It 126AMD Am79C973/Am79C975 PCnet-FAST III 127.It 128AMD Am79C976 PCnet-PRO 129.It 130AMD Am79C978 PCnet-Home 131.It 132Allied-Telesis LA-PCI 133.El 134.Sh DIAGNOSTICS 135.Bl -diag 136.It "pcn%d: couldn't map ports/memory" 137A fatal initialization error has occurred. 138.It "pcn%d: couldn't map interrupt" 139A fatal initialization error has occurred. 140.It "pcn%d: watchdog timeout" 141The device has stopped responding to the network, or there is a problem with 142the network connection (e.g.\& a cable fault). 143.It "pcn%d: no memory for rx list" 144The driver failed to allocate an mbuf for the receiver ring. 145.It "pcn%d: no memory for tx list" 146The driver failed to allocate an mbuf for the transmitter ring when 147allocating a pad buffer or collapsing an mbuf chain into a cluster. 148.It "pcn%d: chip is in D3 power state -- setting to D0" 149This message applies only to adapters which support power 150management. 151Some operating systems place the controller in low power 152mode when shutting down, and some PCI BIOSes fail to bring the chip 153out of this state before configuring it. 154The controller loses all of 155its PCI configuration in the D3 state, so if the BIOS does not set 156it back to full power mode in time, it will not be able to configure it 157correctly. 158The driver tries to detect this condition and bring 159the adapter back to the D0 (full power) state, but this may not be 160enough to return the driver to a fully operational condition. 161If 162you see this message at boot time and the driver fails to attach 163the device as a network interface, you will have to perform a 164warm boot to have the device properly configured. 165.Pp 166Note that this condition only occurs when warm booting from another 167operating system. 168If you power down your system prior to booting 169.Fx , 170the card should be configured correctly. 171.El 172.Sh SEE ALSO 173.Xr arp 4 , 174.Xr miibus 4 , 175.Xr netintro 4 , 176.Xr ng_ether 4 , 177.Xr ifconfig 8 178.Rs 179.%T AMD PCnet/FAST, PCnet/FAST+ and PCnet/Home datasheets 180.%U http://www.amd.com 181.Re 182.Sh HISTORY 183The 184.Nm 185device driver first appeared in 186.Fx 4.3 . 187.Sh AUTHORS 188The 189.Nm 190driver was written by 191.An Bill Paul Aq Mt wpaul@osd.bsdi.com . 192