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: src/share/man/man4/pcn.4,v 1.3.2.5 2003/02/17 21:20:39 trhodes Exp $ 33.\" 34.Dd September 18, 2000 35.Dt PCN 4 36.Os 37.Sh NAME 38.Nm pcn 39.Nd "AMD PCnet/PCI fast ethernet device driver" 40.Sh SYNOPSIS 41.Cd "device miibus" 42.Cd "device pcn" 43.Sh DESCRIPTION 44The 45.Nm 46driver provides support for PCI ethernet adapters and embedded 47controllers based on the AMD PCnet/FAST, PCnet/FAST+, PCnet/FAST III, 48PCnet/PRO and PCnet/Home ethernet controller chips. 49.Pp 50The PCnet/PCI chips include a 100Mbps ethernet MAC and support 51both a serial and MII-compliant transceiver interface. 52They use a bus master DMA and a scatter/gather descriptor scheme. 53The AMD chips provide a mechanism for zero-copy receive, 54providing good performance in server environments. 55Receive address filtering is provided using a single perfect filter entry 56for the station address and a 64-bit multicast hash table. 57.Pp 58The 59.Nm 60driver supports the following media types: 61.Bl -tag -width 10baseTXUTP 62.It autoselect 63Enable autoselection of the media type and options. 64The user can manually override 65the autoselected mode by adding media options to 66.Xr rc.conf 5 . 67.It 10baseT/UTP 68Set 10Mbps operation. 69The 70.Xr ifconfig 8 71.Cm mediaopt 72option can also be used to select either 73.Sq full-duplex 74or 75.Sq half-duplex 76modes. 77.It 100baseTX 78Set 100Mbps (fast ethernet) operation. 79The 80.Xr ifconfig 8 81.Cm mediaopt 82option can also be used to select either 83.Sq full-duplex 84or 85.Sq half-duplex 86modes. 87.El 88.Pp 89The 90.Nm 91driver supports the following media options: 92.Bl -tag -width full-duplex 93.It full-duplex 94Force full duplex operation 95.It half-duplex 96Force half duplex operation. 97.El 98.Pp 99For more information on configuring this device, see 100.Xr ifconfig 8 . 101.Sh DIAGNOSTICS 102.Bl -diag 103.It "pcn%d: couldn't map ports/memory" 104A fatal initialization error has occurred. 105.It "pcn%d: couldn't map interrupt" 106A fatal initialization error has occurred. 107.It "pcn%d: watchdog timeout" 108The device has stopped responding to the network, or there is a problem with 109the network connection (e.g. a cable fault). 110.It "pcn%d: no memory for rx list" 111The driver failed to allocate an mbuf for the receiver ring. 112.It "pcn%d: no memory for tx list" 113The driver failed to allocate an mbuf for the transmitter ring when 114allocating a pad buffer or collapsing an mbuf chain into a clusisr. 115.It "pcn%d: chip is in D3 power state -- setting to D0" 116This message applies only to adapters which support power 117management. 118Some operating systems place the controller in low power 119mode when shutting down, and some PCI BIOSes fail to bring the chip 120out of this state before configuring it. 121The controller loses all of 122its PCI configuration in the D3 state, so if the BIOS does not set 123it back to full power mode in time, it will not be able to configure it 124correctly. 125The driver tries to detect this condition and bring 126the adapter back to the D0 (full power) state, but this may not be 127enough to return the driver to a fully operational condition. 128If 129you see this message at boot time and the driver fails to attach 130the device as a network interface, you will have to perform a 131warm boot to have the device properly configured. 132.Pp 133Note that this condition only occurs when warm booting from another 134operating system. 135If you power down your system prior to booting 136.Dx , 137the card should be configured correctly. 138.El 139.Sh SEE ALSO 140.Xr arp 4 , 141.Xr ifmedia 4 , 142.Xr miibus 4 , 143.Xr netintro 4 , 144.Xr ng_ether 4 , 145.Xr ifconfig 8 146.Rs 147.%T AMD PCnet/FAST, PCnet/FAST+ and PCnet/Home datasheets 148.%O http://www.amd.com 149.Re 150.Sh HISTORY 151The 152.Nm 153device driver first appeared in 154.Fx 4.3 . 155.Sh AUTHORS 156The 157.Nm 158driver was written by 159.An Bill Paul Aq Mt wpaul@osd.bsdi.com . 160