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.Pp 62.Bl -tag -width 10baseTXUTP 63.It autoselect 64Enable autoselection of the media type and options. 65The user can manually override 66the autoselected mode by adding media options to 67.Xr rc.conf 5 . 68.It 10baseT/UTP 69Set 10Mbps operation. 70The 71.Xr ifconfig 8 72.Cm mediaopt 73option can also be used to select either 74.Sq full-duplex 75or 76.Sq half-duplex 77modes. 78.It 100baseTX 79Set 100Mbps (fast ethernet) operation. 80The 81.Xr ifconfig 8 82.Cm mediaopt 83option can also be used to select either 84.Sq full-duplex 85or 86.Sq half-duplex 87modes. 88.El 89.Pp 90The 91.Nm 92driver supports the following media options: 93.Pp 94.Bl -tag -width full-duplex 95.It full-duplex 96Force full duplex operation 97.It half-duplex 98Force half duplex operation. 99.El 100.Pp 101For more information on configuring this device, see 102.Xr ifconfig 8 . 103.Sh DIAGNOSTICS 104.Bl -diag 105.It "pcn%d: couldn't map ports/memory" 106A fatal initialization error has occurred. 107.It "pcn%d: couldn't map interrupt" 108A fatal initialization error has occurred. 109.It "pcn%d: watchdog timeout" 110The device has stopped responding to the network, or there is a problem with 111the network connection (e.g. a cable fault). 112.It "pcn%d: no memory for rx list" 113The driver failed to allocate an mbuf for the receiver ring. 114.It "pcn%d: no memory for tx list" 115The driver failed to allocate an mbuf for the transmitter ring when 116allocating a pad buffer or collapsing an mbuf chain into a clusisr. 117.It "pcn%d: chip is in D3 power state -- setting to D0" 118This message applies only to adapters which support power 119management. 120Some operating systems place the controller in low power 121mode when shutting down, and some PCI BIOSes fail to bring the chip 122out of this state before configuring it. 123The controller loses all of 124its PCI configuration in the D3 state, so if the BIOS does not set 125it back to full power mode in time, it will not be able to configure it 126correctly. 127The driver tries to detect this condition and bring 128the adapter back to the D0 (full power) state, but this may not be 129enough to return the driver to a fully operational condition. 130If 131you see this message at boot time and the driver fails to attach 132the device as a network interface, you will have to perform a 133warm boot to have the device properly configured. 134.Pp 135Note that this condition only occurs when warm booting from another 136operating system. 137If you power down your system prior to booting 138.Fx , 139the card should be configured correctly. 140.El 141.Sh SEE ALSO 142.Xr arp 4 , 143.Xr miibus 4 , 144.Xr netintro 4 , 145.Xr ng_ether 4 , 146.Xr ifconfig 8 147.Rs 148.%T AMD PCnet/FAST, PCnet/FAST+ and PCnet/Home datasheets 149.%O http://www.amd.com 150.Re 151.Sh HISTORY 152The 153.Nm 154device driver first appeared in 155.Fx 4.3 . 156.Sh AUTHORS 157The 158.Nm 159driver was written by 160.An Bill Paul Aq wpaul@osd.bsdi.com . 161