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$FreeBSD: releng/11.0/share/man/man4/vte.4 267938 2014-06-26 21:46:14Z bapt $
.Dd December 30, 2010 .Dt VTE 4 .Os .Sh NAME .Nm vte .Nd Vortex86 RDC R6040 Fast Ethernet driver .Sh SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: d -ragged -offset indent .Cd "device miibus" .Cd "device vte" .Ed
p Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : d -literal -offset indent if_vte_load="YES" .Ed .Sh DESCRIPTION The .Nm device driver provides support for RDC R6040 Fast Ethernet controller which is commonly found on Vortex86 System On a Chip (SoC).
p The RDC R6040 has integrated 10/100 PHY for 10/100Mbps support in full or half-duplex. The controller supports interrupt moderation mechanism, a 64-bit multicast hash filter, VLAN over-size frame and four station addresses. The .Nm device driver uses three station addresses out of four as perfect multicast filter.
p The .Nm driver supports the following media types: l -tag -width ".Cm 10baseT/UTP" t Cm autoselect Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to .Xr rc.conf 5 . t Cm 10baseT/UTP Set 10Mbps operation. t Cm 100baseTX Set 100Mbps (Fast Ethernet) operation. .El
p The .Nm driver supports the following media options: l -tag -width ".Cm full-duplex" t Cm full-duplex Force full duplex operation. t Cm half-duplex Force half duplex operation. .El
p For more information on configuring this device, see .Xr ifconfig 8 . .Sh HARDWARE The .Nm device driver provides support for the following Ethernet controllers:
p l -bullet -compact t DM&P Vortex86 RDC R6040 Fast Ethernet controller .El .Sh LOADER TUNABLES Tunables can be set at the .Xr loader 8 prompt before booting the kernel or stored in .Xr loader.conf 5 . l -tag -width "xxxxxx" t Va hw.vte.tx_deep_copy The RDC R6040 controller has no auto-padding support for short frames and the controller's DMA engine does not have capability to handle multiple buffers for a TX frame such that driver has to create a single contiguous TX buffer. This hardware limitation leads to poor TX performance since most of CPU cycles are wasted on both de-fragmenting mbuf chains and padding. This tunable enables deep copy operation for TX frames such that driver will spend less CPU cycles in de-fragmentation with the cost of extra TX buffer memory. The default value is 1 to use deep copy. .El .Sh SYSCTL VARIABLES The following variables are available as both .Xr sysctl 8 variables and .Xr loader 8 tunables: l -tag -width "xxxxxx" t Va dev.vte.%d.rx_mod Maximum number of packets to fire RX completion interrupt. The accepted range is 0 to 15, the default is 15. t Va dev.vte.%d.tx_mod Maximum number of packets to fire TX completion interrupt. The accepted range is 0 to 15, the default is 15. t Va dev.vte.%d.stats Show hardware MAC statistics maintained in driver. .El .Sh SEE ALSO .Xr altq 4 , .Xr arp 4 , .Xr miibus 4 , .Xr netintro 4 , .Xr ng_ether 4 , .Xr vlan 4 , .Xr ifconfig 8 .Rs .%T "DM&P Electronics Inc. Vortex86" .%U http://www.dmp.com.tw .Re .Sh HISTORY The .Nm driver was written by .An Pyun YongHyeon Aq Mt yongari@FreeBSD.org . It first appeared in .Fx 8.3 .