1.\" Copyright (c) 2010 Pyun YongHyeon 2.\" 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.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd December 30, 2010 26.Dt VTE 4 27.Os 28.Sh NAME 29.Nm vte 30.Nd Vortex86 RDC R6040 Fast Ethernet driver 31.Sh SYNOPSIS 32To compile this driver into the kernel, 33place the following lines in your 34kernel configuration file: 35.Bd -ragged -offset indent 36.Cd "device miibus" 37.Cd "device vte" 38.Ed 39.Pp 40Alternatively, to load the driver as a 41module at boot time, place the following line in 42.Xr loader.conf 5 : 43.Bd -literal -offset indent 44if_vte_load="YES" 45.Ed 46.Sh DESCRIPTION 47The 48.Nm 49device driver provides support for RDC R6040 Fast Ethernet controller 50which is commonly found on Vortex86 System On a Chip (SoC). 51.Pp 52The RDC R6040 has integrated 10/100 PHY for 10/100Mbps support in full 53or half-duplex. 54The controller supports interrupt moderation mechanism, a 64-bit multicast 55hash filter, VLAN over-size frame and four station addresses. 56The 57.Nm 58device driver uses three station addresses out of four as perfect 59multicast filter. 60.Pp 61The 62.Nm 63driver supports the following media types: 64.Bl -tag -width ".Cm 10baseT/UTP" 65.It Cm autoselect 66Enable autoselection of the media type and options. 67The user can manually override 68the autoselected mode by adding media options to 69.Xr rc.conf 5 . 70.It Cm 10baseT/UTP 71Set 10Mbps operation. 72.It Cm 100baseTX 73Set 100Mbps (Fast Ethernet) operation. 74.El 75.Pp 76The 77.Nm 78driver supports the following media options: 79.Bl -tag -width ".Cm full-duplex" 80.It Cm full-duplex 81Force full duplex operation. 82.It Cm half-duplex 83Force half duplex operation. 84.El 85.Pp 86For more information on configuring this device, see 87.Xr ifconfig 8 . 88.Sh HARDWARE 89The 90.Nm 91device driver provides support for the following Ethernet controllers: 92.Pp 93.Bl -bullet -compact 94.It 95DM&P Vortex86 RDC R6040 Fast Ethernet controller 96.El 97.Sh LOADER TUNABLES 98Tunables can be set at the 99.Xr loader 8 100prompt before booting the kernel or stored in 101.Xr loader.conf 5 . 102.Bl -tag -width "xxxxxx" 103.It Va hw.vte.tx_deep_copy 104The RDC R6040 controller has no auto-padding support for short 105frames and the controller's DMA engine does not have capability to 106handle multiple buffers for a TX frame such that driver has to 107create a single contiguous TX buffer. 108This hardware limitation leads to poor TX performance since most of 109CPU cycles are wasted on both de-fragmenting mbuf chains and padding. 110This tunable enables deep copy operation for TX frames such that 111driver will spend less CPU cycles in de-fragmentation with the 112cost of extra TX buffer memory. 113The default value is 1 to use deep copy. 114.El 115.Sh SYSCTL VARIABLES 116The following variables are available as both 117.Xr sysctl 8 118variables and 119.Xr loader 8 120tunables: 121.Bl -tag -width "xxxxxx" 122.It Va dev.vte.%d.rx_mod 123Maximum number of packets to fire RX completion interrupt. 124The accepted range is 0 to 15, the default is 15. 125.It Va dev.vte.%d.tx_mod 126Maximum number of packets to fire TX completion interrupt. 127The accepted range is 0 to 15, the default is 15. 128.It Va dev.vte.%d.stats 129Show hardware MAC statistics maintained in driver. 130.El 131.Sh SEE ALSO 132.Xr altq 4 , 133.Xr arp 4 , 134.Xr miibus 4 , 135.Xr netintro 4 , 136.Xr ng_ether 4 , 137.Xr vlan 4 , 138.Xr ifconfig 8 139.Rs 140.%T "DM&P Electronics Inc. Vortex86" 141.%U http://www.dmp.com.tw 142.Re 143.Sh HISTORY 144The 145.Nm 146driver was written by 147.An Pyun YongHyeon Aq Mt yongari@FreeBSD.org . 148It first appeared in 149.Fx 8.3 . 150