.\"     $OpenBSD: tx.4,v 1.8 2001/02/23 23:08:08 jason Exp $
.\"
.\" Copyright (c) 1998 Jason L. Wright (jason@thought.net)
.\" All rights reserved.
.\"
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.\"    must display the following acknowledgement:
.\"      This product includes software developed by Jason L. Wright
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.Dd September 21, 1998
.Dt TX 4
.Os
.Sh NAME
.Nm tx
.Nd SMC 9432 10/100 Mbps Ethernet driver
.Sh SYNOPSIS
.Cd "tx* at pci? dev ? function ?"
.Sh DESCRIPTION
The
.Nm
interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the
.Tn SMC
.Tn EPIC
chipset.
This driver provides support for the
.Tn SMC
.Tn EtherPower II 10/100
Ethernet cards.
.Pp
Each of the host's network addresses
is specified at boot time with an
.Dv SIOCSIFADDR
.Xr ioctl 2 .
The
.Nm
interface employs the address resolution protocol described in
.Xr arp 4
to dynamically map between Internet and Ethernet addresses on the local
network.
.Pp
When a
.Nm
interface is brought up, by default, it will attempt to auto-negotiate the
link speed and duplex.  The speeds, in order of attempt, are:
100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and
10 Mb/s Half Duplex.
.Pp
The
.Nm
supports several media types, which are selected via the
.Xr ifconfig 8
command.
The supported media types are:
.Bl -tag -width xxxxxxxxxxxxxx -offset indent
.It media autoselect
Attempt to autoselect the media type (default)
.It media 100baseFX mediaopt full-duplex
Use 100baseFX (fiber), full duplex
.It media 100baseFX Op mediaopt half-duplex
Use 100baseFX (fiber), half duplex
.It media 100baseTX mediaopt full-duplex
Use 100baseTX, full duplex
.It media 100baseTX Op mediaopt half-duplex
Use 100baseTX, half duplex
.It media 100baseTX mediaopt loopback
Put the interface into loopback mode
.It media 10baseT mediaopt full-duplex
Use 10baseT, full duplex
.It media 10baseT Op mediaopt half-duplex
Use 10baseT, half duplex
.It media 10baseT mediaopt loopback
Put the interface into loopback mode
.El
.Sh DIAGNOSTICS
.Bl -diag
.It "tx%d: device timeout %d packets"
The device stopped responding. Device and driver reset follows this error.
.It "tx%d: PCI fatal error occurred (%s)"
One of following errors occurred: PCI Target Abort, PCI Master Abort, Data
Parity Error or Address Parity Error. Device and driver reset follows
this error.
.It "tx%d: WARNING! no link established"
No media connected. Displayed at startup only.
.It "tx%d: cannot allocate mbuf header/cluster"
Failed to allocate memory for a received packet. Packet was dropped.
.It "tx%d: can't stop %s DMA"
While resetting, the driver failed to stop the device correctly.
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr inet 4 ,
.Xr intro 4 ,
.Xr ifconfig 8
.Sh BUGS
Multicast packet filtering is not supported.
.Sh HISTORY
.Ox
support for the
.Nm
first appeared in
.Ox 2.4 .