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.\" $FreeBSD$ 26.\" 27.Dd December 30, 2010 28.Dt VTE 4 29.Os 30.Sh NAME 31.Nm vte 32.Nd Vortex86 RDC R6040 Fast Ethernet driver 33.Sh SYNOPSIS 34To compile this driver into the kernel, 35place the following lines in your 36kernel configuration file: 37.Bd -ragged -offset indent 38.Cd "device miibus" 39.Cd "device vte" 40.Ed 41.Pp 42Alternatively, to load the driver as a 43module at boot time, place the following line in 44.Xr loader.conf 5 : 45.Bd -literal -offset indent 46if_vte_load="YES" 47.Ed 48.Sh DESCRIPTION 49The 50.Nm 51device driver provides support for RDC R6040 Fast Ethernet controller 52which is commonly found on Vortex86 System On a Chip (SoC). 53.Pp 54The RDC R6040 has integrated 10/100 PHY for 10/100Mbps support in full 55or half-duplex. 56The controller supports interrupt moderation mechanism, a 64-bit multicast 57hash filter, VLAN over-size frame and four station addresses. 58The 59.Nm 60device driver uses three station addresses out of four as perfect 61multicast filter. 62.Pp 63The 64.Nm 65driver supports the following media types: 66.Bl -tag -width ".Cm 10baseT/UTP" 67.It Cm autoselect 68Enable autoselection of the media type and options. 69The user can manually override 70the autoselected mode by adding media options to 71.Xr rc.conf 5 . 72.It Cm 10baseT/UTP 73Set 10Mbps operation. 74.It Cm 100baseTX 75Set 100Mbps (Fast Ethernet) operation. 76.El 77.Pp 78The 79.Nm 80driver supports the following media options: 81.Bl -tag -width ".Cm full-duplex" 82.It Cm full-duplex 83Force full duplex operation. 84.It Cm half-duplex 85Force half duplex operation. 86.El 87.Pp 88For more information on configuring this device, see 89.Xr ifconfig 8 . 90.Sh HARDWARE 91The 92.Nm 93device driver provides support for the following Ethernet controllers: 94.Pp 95.Bl -bullet -compact 96.It 97DM&P Vortex86 RDC R6040 Fast Ethernet controller 98.El 99.Sh LOADER TUNABLES 100Tunables can be set at the 101.Xr loader 8 102prompt before booting the kernel or stored in 103.Xr loader.conf 5 . 104.Bl -tag -width "xxxxxx" 105.It Va hw.vte.tx_deep_copy 106The RDC R6040 controller has no auto-padding support for short 107frames and the controller's DMA engine does not have capability to 108handle multiple buffers for a TX frame such that driver has to 109create a single contiguous TX buffer. 110This hardware limitation leads to poor TX performance since most of 111CPU cycles are wasted on both de-fragmenting mbuf chains and padding. 112This tunable enables deep copy operation for TX frames such that 113driver will spend less CPU cycles in de-fragmentation with the 114cost of extra TX buffer memory. 115The default value is 1 to use deep copy. 116.El 117.Sh SYSCTL VARIABLES 118The following variables are available as both 119.Xr sysctl 8 120variables and 121.Xr loader 8 122tunables: 123.Bl -tag -width "xxxxxx" 124.It Va dev.vte.%d.rx_mod 125Maximum number of packets to fire RX completion interrupt. 126The accepted range is 0 to 15, the default is 15. 127.It Va dev.vte.%d.tx_mod 128Maximum number of packets to fire TX completion interrupt. 129The accepted range is 0 to 15, the default is 15. 130.It Va dev.vte.%d.stats 131Show hardware MAC statistics maintained in driver. 132.El 133.Sh SEE ALSO 134.Xr altq 4 , 135.Xr arp 4 , 136.Xr miibus 4 , 137.Xr netintro 4 , 138.Xr ng_ether 4 , 139.Xr vlan 4 , 140.Xr ifconfig 8 141.Rs 142.%T "DM&P Electronics Inc. Vortex86" 143.%U http://www.dmp.com.tw 144.Re 145.Sh HISTORY 146The 147.Nm 148driver was written by 149.An Pyun YongHyeon Aq Mt yongari@FreeBSD.org . 150It first appeared in 151.Fx 8.3 . 152