.\" $OpenBSD: em.4,v 1.7 2003/03/06 04:03:40 david Exp $
.\" Copyright (c) 2002 Intel Corporation
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.\" modification, are permitted provided that the following conditions 
.\" are met:
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.\" above copyright notice, this list of conditions and the following 
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.\" $FreeBSD$
.Dd March 1, 2002 
.Dt EM 4
.Os
.Sh NAME
.Nm em
.Nd "Intel(R) PRO/1000 gigabit Ethernet driver"
.Sh SYNOPSIS
.Cd "em* at pci? dev ? function ?"
.Sh DESCRIPTION
The
.Nm
driver provides support for PCI gigabit Ethernet adapters based on the
Intel 82540, 82542, 82543, 82544, 82545 and 82546 Ethernet controller chips.
This includes the following models:
.Pp
.Bl -item -offset indent -compact
.It
Intel PRO/1000 Gigabit Server Adapter (SX Fiber) (PWLA8490)
.It
Intel PRO/1000F Gigabit Server Adapter (SX Fiber) (PWLA8490SX)
.It
Intel PRO/1000T Server Adapter (PWLA8490T)
.It
Intel PRO/1000XT Server Adapter (PWLA8490XT)
.It
Intel PRO/1000XS Server Adapter (SX Fiber) (PWLA8490XF)
.It
Intel PRO/1000T Desktop Adapter (PWLA8390T)
.It
Intel PRO/1000XTL Lo Profile PCI Server (PWLA8490XTL)
.It
Intel PRO/1000MT Desktop Adapter (PWLA8390MT)
.It
Intel PRO/1000MT Server Adapter (PWLA8490MT)
.It
Intel PRO/1000MT Dual Port Server Adapter (PWLA8492MT)
.It
Intel PRO/1000MF Server Adapter (SX Fiber) (PWLA8490MF)
.It
Intel PRO/1000MF Dual Port Server Adapter (SX Fiber) (PWLA8492MF)
.It
Intel PRO/1000MF Server Adapter (LX Fiber) (PWLA8490LX)
.El
.Pp
The
.Nm
driver supports the following media types:
.Pp
.Bl -tag -width xxx -offset indent
.It Cm media No autoselect
Enables auto-negotiation for speed and duplex.
.It Cm media No 10baseT Cm mediaopt No full-duplex
Sets 10Mbps operation.
.It Cm media No 100baseTX Cm mediaopt No full-duplex
Sets 100Mbps operation.
.It Cm media No 1000baseSX
Sets 1000Mbps operation.
Only 
full-duplex
mode is supported at this speed.
.It Cm media No 1000baseT
Sets 1000Mbps operation.
Only 
full-duplex
mode is supported at this speed.
.El
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
.Sh DIAGNOSTICS
.Bl -diag
.It "em%d: Unable to allocate bus resource: memory"
A fatal initialization error has occurred.
.It "em%d: Unable to allocate bus resource: interrupt"
A fatal initialization error has occurred.
.It "em%d: watchdog timeout -- resetting"
The device has stopped responding to the network, or there is a problem with
the network connection (cable).
.El
.Sh SUPPORT
For general information and support, go to the Intel support website at:
.Pa http://support.intel.com .
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr vlan 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
device driver first appeared in
.Ox 3.2 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Intel Corporation Aq freebsdnic@mailbox.intel.com .