.\" $OpenBSD: em.4,v 1.25 2006/03/04 04:19:29 brad Exp $
.\" Copyright (c) 2002 Intel Corporation
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.\" modification, are permitted provided that the following conditions
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.\" $FreeBSD: em.4,v 1.18 2005/01/30 12:29:06 yar Exp $
.Dd February 13, 2005
.Dt EM 4
.Os
.Sh NAME
.Nm em
.Nd "Intel(R) PRO/1000 Gigabit Ethernet driver"
.Sh SYNOPSIS
.Cd "em* at pci?"
.Sh DESCRIPTION
The
.Nm
driver provides support for PCI, PCI-X and PCI Express Gigabit Ethernet adapters
based on the Intel 82540EM, 82540EP, 82541EI, 82541ER, 82541GI, 82542, 82543GC,
82544EI, 82544GC, 82545EM, 82545GC, 82546EB, 82546GB, 82547EI, 82547GI, 82571EB,
82572EI, 82573E and 82573L Ethernet controller chips.
The driver supports IPv4 receive IP/TCP/UDP checksum offload on all but
82542-based adapters and Jumbo frames on all but 82573-based adapters.
This includes the following models:
.Pp
.Bl -item -offset indent -compact
.It
HP ProLiant NC310F PCI-X Gigabit NIC (SX Fiber)
.It
HP ProLiant NC6132 Upgrade Module (SX Fiber)
.It
HP ProLiant NC6133 Upgrade Module (LX Fiber)
.It
HP ProLiant NC6134 PCI Gigabit NIC (SX Fiber)
.It
HP ProLiant NC6136 PCI Gigabit NIC (SX Fiber)
.It
HP ProLiant NC6170 PCI-X Gigabit NIC (SX Fiber)
.It
HP ProLiant NC7131 PCI Gigabit NIC
.It
HP ProLiant NC7132 Upgrade Module
.It
HP ProLiant NC7170 PCI-X Gigabit NIC
.It
HP ProLiant NC7170LP PCI-X Gigabit NIC
.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 Low 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)
.It
Intel PRO/1000MT Quad PCI-X Adapter (PWLA8494MT)
.It
Intel PRO/1000PT Desktop Adapter
.It
Intel PRO/1000PT Server Adapter
.It
Intel PRO/1000PT Dual Port Server Adapter
.It
Intel PRO/1000PF Server Adapter (SX Fiber)
.It
Intel PRO/1000PF Dual Port Server Adapter (SX Fiber)
.El
.Pp
The
.Nm
driver supports the following media types:
.Bl -tag -width autoselect -offset indent
.It autoselect
Enables auto-negotiation for speed and duplex.
.It 10baseT Cm mediaopt No full-duplex
Sets 10Mbps operation.
.It 100baseTX Cm mediaopt No full-duplex
Sets 100Mbps operation.
.It 1000baseSX
Sets 1000Mbps operation.
Only full-duplex mode is supported at this speed.
.It 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 SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Pp
For general information and support, go to the Intel support website at
.Pa http://support.intel.com .
.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 .
.Sh BUGS
There are known performance issues with this driver when running UDP traffic
with Jumbo frames.
.Pp
There is a known compatibility issue where time to link is slow or link is not
established between 82541/82547 controllers and some switches.
Known switches include:
.Pp
.Bl -item -offset indent -compact
.It
I-O Data ETG-SH8
.It
Planex FXG-08TE
.El