1.\" Copyright (c) 1997, 1998 2.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by Bill Paul. 15.\" 4. Neither the name of the author nor the names of any co-contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 23.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29.\" THE POSSIBILITY OF SUCH DAMAGE. 30.\" 31.\" $FreeBSD$ 32.\" 33.Dd February 7, 2010 34.Dt VR 4 35.Os 36.Sh NAME 37.Nm vr 38.Nd "VIA Technologies Rhine I/II/III Ethernet device driver" 39.Sh SYNOPSIS 40To compile this driver into the kernel, 41place the following lines in your 42kernel configuration file: 43.Bd -ragged -offset indent 44.Cd "device miibus" 45.Cd "device vr" 46.Ed 47.Pp 48Alternatively, to load the driver as a 49module at boot time, place the following line in 50.Xr loader.conf 5 : 51.Bd -literal -offset indent 52if_vr_load="YES" 53.Ed 54.Sh DESCRIPTION 55The 56.Nm 57driver provides support for PCI Ethernet adapters and embedded 58controllers based on the VIA Technologies VT3043 Rhine I, 59VT86C100A Rhine II, and VT6105/VT6105M Rhine III Fast Ethernet 60controller chips. 61.Pp 62The VIA Rhine chips use bus master DMA and have a descriptor layout 63designed to resemble that of the DEC 21x4x 64.Dq tulip 65chips. 66The register 67layout is different however and the receive filter in the Rhine chips 68is much simpler and is programmed through registers rather than by 69downloading a special setup frame through the transmit DMA engine. 70Transmit and receive DMA buffers must be longword 71aligned. 72The Rhine chips are meant to be interfaced with external 73physical layer devices via an MII bus. 74They support both 7510 and 100Mbps speeds in either full or half duplex. 76.Pp 77The 78.Nm 79driver supports the following media types: 80.Bl -tag -width xxxxxxxxxxxxxxxxxxxx 81.It autoselect 82Enable autoselection of the media type and options. 83The user can manually override 84the autoselected mode by adding media options to the 85.Pa /etc/rc.conf 86file. 87.It 10baseT/UTP 88Set 10Mbps operation. 89The 90.Ar mediaopt 91option can also be used to select either 92.Ar full-duplex 93or 94.Ar half-duplex 95modes. 96.It 100baseTX 97Set 100Mbps (Fast Fthernet) operation. 98The 99.Ar mediaopt 100option can also be used to select either 101.Ar full-duplex 102or 103.Ar half-duplex 104modes. 105.El 106.Pp 107The 108.Nm 109driver supports the following media options: 110.Bl -tag -width xxxxxxxxxxxxxxxxxxxx 111.It full-duplex 112Force full duplex operation 113.It half-duplex 114Force half duplex operation. 115.El 116.Pp 117Note that the 100baseTX media type is only available if supported 118by the adapter. 119For more information on configuring this device, see 120.Xr ifconfig 8 . 121.Sh HARDWARE 122The 123.Nm 124driver supports VIA Technologies Rhine I, Rhine II, and Rhine III based 125Fast Ethernet adapters including: 126.Pp 127.Bl -bullet -compact 128.It 129AOpen/Acer ALN-320 130.It 131D-Link DFE520-TX 132.It 133D-Link DFE530-TX 134.It 135Hawking Technologies PN102TX 136.It 137Soekris Engineering net5501 138.El 139.Sh SYSCTL VARIABLES 140The following variables are available as 141.Xr sysctl 8 142variables: 143.Bl -tag -width indent 144.It Va dev.vr.%d.stats 145Display lots of useful MAC counters maintained in the driver. 146.El 147.Sh DIAGNOSTICS 148.Bl -diag 149.It "vr%d: couldn't map memory" 150A fatal initialization error has occurred. 151.It "vr%d: couldn't map interrupt" 152A fatal initialization error has occurred. 153.It "vr%d: watchdog timeout" 154The device has stopped responding to the network, or there is a problem with 155the network connection (cable). 156.It "vr%d: no memory for rx list" 157The driver failed to allocate an mbuf for the receiver ring. 158.It "vr%d: no memory for tx list" 159The driver failed to allocate an mbuf for the transmitter ring when 160allocating a pad buffer or collapsing an mbuf chain into a cluster. 161.It "vr%d: chip is in D3 power state -- setting to D0" 162This message applies only to adapters which support power 163management. 164Some operating systems place the controller in low power 165mode when shutting down, and some PCI BIOSes fail to bring the chip 166out of this state before configuring it. 167The controller loses all of 168its PCI configuration in the D3 state, so if the BIOS does not set 169it back to full power mode in time, it will not be able to configure it 170correctly. 171The driver tries to detect this condition and bring 172the adapter back to the D0 (full power) state, but this may not be 173enough to return the driver to a fully operational condition. 174If 175you see this message at boot time and the driver fails to attach 176the device as a network interface, you will have to perform second 177warm boot to have the device properly configured. 178.Pp 179Note that this condition only occurs when warm booting from another 180operating system. 181If you power down your system prior to booting 182.Fx , 183the card should be configured correctly. 184.El 185.Sh SEE ALSO 186.Xr altq 4 , 187.Xr arp 4 , 188.Xr miibus 4 , 189.Xr netintro 4 , 190.Xr ng_ether 4 , 191.Xr polling 4 , 192.Xr ifconfig 8 193.Rs 194.%T The VIA Technologies VT86C100A data sheet 195.%U http://www.via.com.tw 196.Re 197.Sh HISTORY 198The 199.Nm 200device driver first appeared in 201.Fx 3.0 . 202.Sh AUTHORS 203The 204.Nm 205driver was written by 206.An Bill Paul Aq wpaul@ctr.columbia.edu . 207.Sh BUGS 208The 209.Nm 210driver always copies transmit mbuf chains into longword-aligned 211buffers prior to transmission in order to pacify the Rhine chips. 212If buffers are not aligned correctly, the chip will round the 213supplied buffer address and begin DMAing from the wrong location. 214This buffer copying impairs transmit performance on slower systems but cannot 215be avoided. 216On faster machines (e.g.\& a Pentium II), the performance 217impact is much less noticeable. 218