1.\" $OpenBSD: vr.4,v 1.8 2001/06/23 07:04:00 pjanzen Exp $ 2.\" 3.\" Copyright (c) 1997, 1998 4.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by Bill Paul. 17.\" 4. Neither the name of the author nor the names of any co-contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 25.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31.\" THE POSSIBILITY OF SUCH DAMAGE. 32.\" 33.\" $FreeBSD: vr.4,v 1.3 1999/03/25 00:52:44 wpaul Exp $ 34.\" 35.Dd November 22, 1998 36.Dt VR 4 37.Os 38.Sh NAME 39.Nm vr 40.Nd VIA Technologies VT3043 and VT86C100A Ethernet driver 41.Sh SYNOPSIS 42.Cd "vr* at pci? dev ? function ?" 43.Sh DESCRIPTION 44The 45.Nm 46driver provides support for PCI Ethernet adapters and embedded 47controllers based on the VIA Technologies VT3043 Rhine I and 48VT86C100A Rhine II Fast Ethernet controller chips. 49This includes the D-Link DFE530-TX and various other commodity Fast Ethernet 50cards. 51.Pp 52The VIA Rhine chips use bus master DMA and have a software interface 53designed to resemble that of the DEC 21x4x "tulip" chips. 54The major differences are that the receive filter in the Rhine chips is 55much simpler and is programmed through registers rather than by 56downloading a special setup frame through the transmit DMA engine, 57and that transmit and receive DMA buffers must be longword aligned. 58The Rhine chips are meant to be interfaced with external 59physical layer devices via an MII bus. 60They support both 10 and 100Mbps speeds in either full or half duplex. 61.Pp 62The 63.Nm 64driver supports the following media types: 65.Pp 66.Bl -tag -width xxxxxxxxxxxxxxxxxxxx 67.It autoselect 68Enable autoselection of the media type and options. 69The user can manually override 70the autoselected mode by adding media options to the appropriate 71.Pa /etc/hostname.vr%d 72file. 73.It 10baseT/UTP 74Set 10Mbps operation. 75The 76.Ar mediaopt 77option can also be used to select either 78.Ar full-duplex 79or 80.Ar half-duplex 81modes. 82.It 100baseTX 83Set 100Mbps (Fast Ethernet) operation. 84The 85.Ar mediaopt 86option can also be used to select either 87.Ar full-duplex 88or 89.Ar half-duplex 90modes. 91.El 92.Pp 93The 94.Nm 95driver supports the following media options: 96.Pp 97.Bl -tag -width xxxxxxxxxxxxxxxxxxxx 98.It full-duplex 99Force full duplex operation 100.It half-duplex 101Force half duplex operation. 102.El 103.Pp 104Note that the 100baseTX media type is only available if supported 105by the adapter. 106For more information on configuring this device, see 107.Xr ifconfig 8 . 108.Sh DIAGNOSTICS 109.Bl -diag 110.It "vr%d: couldn't map memory" 111A fatal initialization error has occurred. 112.It "vr%d: couldn't map interrupt" 113A fatal initialization error has occurred. 114.It "vr%d: watchdog timeout" 115The device has stopped responding to the network, or there is a problem with 116the network connection (cable). 117.It "vr%d: no memory for rx list" 118The driver failed to allocate an mbuf for the receiver ring. 119.It "vr%d: no memory for tx list" 120The driver failed to allocate an mbuf for the transmitter ring when 121allocating a pad buffer or collapsing an mbuf chain into a cluster. 122.It "vr%d: chip is in D3 power state -- setting to D0" 123This message applies only to adapters which support power management. 124Some operating systems place the controller in low power 125mode when shutting down, and some PCI BIOSes fail to bring the chip 126out of this state before configuring it. 127The controller loses all of its PCI configuration in the D3 state, so if the 128BIOS does not set it back to full power mode in time, it won't be able to 129configure it correctly. 130The driver tries to detect this condition and bring 131the adapter back to the D0 (full power) state, but this may not be 132enough to return the driver to a fully operational condition. 133If you see this message at boot time and the driver fails to attach 134the device as a network interface, you will have to perform second 135warm boot to have the device properly configured. 136.Pp 137Note that this condition only occurs when warm booting from another 138operating system. 139If you power down your system prior to booting 140.Ox , 141the card should be configured correctly. 142.El 143.Sh SEE ALSO 144.Xr arp 4 , 145.Xr netintro 4 , 146.Xr ifconfig 8 147.Rs 148.%T The VIA Technologies VT86C100A data sheet 149.%O http://www.via.com.tw 150.Re 151.Sh HISTORY 152The 153.Nm 154device driver first appeared in 155.Fx 3.0 . 156.Ox 157support first appeared in 158.Ox 2.5 . 159.Sh AUTHORS 160The 161.Nm 162driver was written by 163.An Bill Paul Aq wpaul@ctr.columbia.edu . 164.Sh BUGS 165The 166.Nm 167driver always copies transmit mbuf chains into longword-aligned 168buffers prior to transmission in order to pacify the Rhine chips. 169If buffers are not aligned correctly, the chip will round the 170supplied buffer address and begin DMAing from the wrong location. 171This buffer copying impairs transmit performance on slower systems but can't 172be avoided. 173On faster machines (e.g., a Pentium II), the performance 174impact is much less noticeable. 175