226 lines
7.0 KiB
Groff
226 lines
7.0 KiB
Groff
.\" Copyright (c) 2004
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.\" Bill Paul <wpaul@windriver.com>. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Bill Paul.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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.\" THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 29, 2011
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.Dt VGE 4
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.Os
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.Sh NAME
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.Nm vge
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.Nd "VIA Networking Technologies Velocity Gigabit Ethernet adapter driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device miibus"
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.Cd "device vge"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_vge_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for various NICs and embedded Ethernet interfaces
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based on the VIA Technologies VT6120, VT6122, VT6130 and VT6132 Velocity
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Family Gigabit Ethernet controller chips.
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.Pp
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The VT6120/VT6122 is a 33/66MHz 64-bit PCI device which combines a tri-speed
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MAC with an integrated 10/100/1000 copper PHY.
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(Some older cards use an external PHY.)
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The VT6130/VT6132 is the PCI express version of Velocity family.
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The MAC supports TCP/IP hardware
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checksums (IPv4 only), TCP large send, VLAN tag insertion and stripping,
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as well as VLAN filtering, a 64-entry CAM filter and a 64-entry VLAN filter,
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64-bit multicast hash filter, 4 separate transmit DMA queues, flow control
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and jumbo frames (not on VT6130/VT6132) up to 16K in size.
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The Velocity family controllers have a 16K receive FIFO and 48K transmit FIFO.
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.Pp
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The
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.Nm
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driver takes advantage of the controller's checksum offload and VLAN
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tagging features, as well as the jumbo frame (except VT6130/VT6132) and CAM
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filter support.
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The CAM filter is used for multicast address filtering to provide
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64 perfect multicast address filter support.
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If it is necessary for the interface to join more than 64 multicast
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groups, the driver will switch over to using the hash filter.
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.Pp
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The jumbo frame support can be enabled by setting the interface MTU
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to any value larger than the default of 1500 bytes, up to a maximum
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of 9000 bytes.
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Jumbo frames are disabled on the VT6130/VT6132 controllers because the TX
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MAC will hang when trying to send a frame that is larger than 4K.
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The receive and transmit checksum offload support
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can be toggled on and off using the
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.Xr ifconfig 8
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utility.
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.Pp
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The
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.Nm
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driver supports the following media types:
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.Bl -tag -width ".Cm 10baseT/UTP"
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.It Cm autoselect
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Enable autoselection of the media type and options.
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The user can manually override
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the autoselected mode by adding media options to
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.Xr rc.conf 5 .
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.It Cm 10baseT/UTP
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Set 10Mbps operation.
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The
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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Cm full-duplex
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or
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.Cm half-duplex
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modes.
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.It Cm 100baseTX
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Set 100Mbps (Fast Ethernet) operation.
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The
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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Cm full-duplex
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or
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.Cm half-duplex
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modes.
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.It Cm 1000baseTX
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Set 1000baseTX operation over twisted pair.
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The
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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Cm full-duplex
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or
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.Cm half-duplex
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modes.
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.El
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.Pp
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The
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.Nm
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driver supports the following media options:
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.Bl -tag -width ".Cm full-duplex"
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.It Cm full-duplex
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Force full duplex operation.
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.It Cm half-duplex
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Force half duplex operation.
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.El
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh HARDWARE
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The
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.Nm
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driver supports VIA Networking VT6120, VT6122, VT6130 and VT6132 based
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Gigabit Ethernet adapters including:
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.Pp
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.Bl -bullet -compact
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.It
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VIA Networking LAN-on-motherboard Gigabit Ethernet
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.It
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ZyXEL GN650-T 64-bit PCI Gigabit Ethernet NIC (ZX1701)
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.It
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ZyXEL GN670-T 32-bit PCI Gigabit Ethernet NIC (ZX1702)
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.El
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.Sh LOADER TUNABLES
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Tunables can be set at the
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.Xr loader 8
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prompt before booting the kernel or stored in
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.Xr loader.conf 5 .
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.Bl -tag -width "xxxxxx"
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.It Va hw.vge.msi_disable
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This tunable disables MSI support on the Ethernet hardware.
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The default value is 0.
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.El
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.Sh SYSCTL VARIABLES
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The following variables are available as both
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.Xr sysctl 8
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variables and
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.Xr loader 8
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tunables:
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.Bl -tag -width "xxxxxx"
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.It Va dev.vge.%d.int_holdoff
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Maximum number of time to delay interrupts.
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The valid range is 0 to 5100 in units of 1us, the default is
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150 (150us).
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The resolution of of timer is about 20us so finer tuning than
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20us wouldn't be available.
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The interface should be brought down and up again before a change
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takes effect.
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.It Va dev.vge.%d.rx_coal_pkt
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Maximum number of packets to fire Rx completion interrupt.
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The valid range is 1 to 255, the default is 64.
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.It Va dev.vge.%d.tx_coal_pkt
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Maximum number of packets to fire Tx completion interrupt.
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The valid range is 1 to 255, the default is 128.
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "vge%d: couldn't map memory"
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A fatal initialization error has occurred.
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.It "vge%d: couldn't map ports"
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A fatal initialization error has occurred.
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.It "vge%d: couldn't map interrupt"
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A fatal initialization error has occurred.
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.It "vge%d: failed to enable memory mapping!"
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The driver failed to initialize PCI shared memory mapping.
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This might
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happen if the card is not in a bus-master slot.
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.It "vge%d: watchdog timeout"
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The device has stopped responding to the network, or there is a problem with
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the network connection (cable).
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.El
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.Sh SEE ALSO
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.Xr altq 4 ,
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.Xr arp 4 ,
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.Xr miibus 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 4 ,
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.Xr polling 4 ,
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.Xr vlan 4 ,
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 5.3 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Bill Paul Aq wpaul@windriver.com .
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