1.\" Copyright (c) 2001-2003, Intel Corporation 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions are met: 6.\" 7.\" 1. Redistributions of source code must retain the above copyright notice, 8.\" this list of conditions and the following disclaimer. 9.\" 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" 3. Neither the name of the Intel Corporation nor the names of its 15.\" contributors may be used to endorse or promote products derived from 16.\" this software without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.\" * Other names and brands may be claimed as the property of others. 31.\" 32.\" $FreeBSD: src/share/man/man4/em.4,v 1.2.2.6 2003/02/01 01:21:31 pdeuskar Exp $ 33.\" $DragonFly: src/share/man/man4/em.4,v 1.3 2004/03/11 12:28:55 hmp Exp $ 34.\" 35.Dd July 26, 2002 36.Dt EM 4 37.Os 38.Sh NAME 39.Nm em 40.Nd "Intel(R) PRO/1000 gigabit Ethernet driver" 41.Sh SYNOPSIS 42.Cd "device em" 43.Sh DESCRIPTION 44The 45.Nm 46driver provides support for PCI gigabit Ethernet adapters based on 47the Intel 82540, 82542, 82543, 82544 and 82546 Ethernet controller chips. 48The driver supports Transmit/Receive checksum offload 49and Jumbo Frames only on 82540, 82543, 82544 and 82546-based adapters. 50For a list of supported adapters, see the 51.Pa README 52included with the driver. 53.Pp 54For questions related to hardware requirements, 55refer to the documentation supplied with your Intel PRO/1000 adapter. 56All hardware requirements listed apply to use with 57.Dx . 58.Pp 59Support for Jumbo Frames is provided via the interface MTU setting. 60Selecting an MTU larger than 1500 bytes with the 61.Xr ifconfig 8 62utility configures the adapter to receive and transmit Jumbo Frames. 63The maximum MTU size for Jumbo Frames is 16114. 64.Pp 65This driver version supports VLANs. 66For information on enabling VLANs, see the 67.Pa README . 68The 69.Nm 70driver supports the following media types: 71.Bl -tag -width ".Cm 10baseT/UTP" 72.It Cm autoselect 73Enables auto-negotiation for speed and duplex. 74.It Cm 10baseT/UTP 75Sets 10Mbps operation. 76Use the 77.Cm mediaopt 78option to select 79.Cm full-duplex 80mode. 81.It Cm 100baseTX 82Sets 100Mbps operation. 83Use the 84.Cm mediaopt 85option to select 86.Cm full-duplex 87mode. 88.It Cm 1000baseSX 89Sets 1000Mbps operation. 90Only 91.Cm full-duplex 92mode is supported at this speed. 93.It Cm 1000baseTX 94Sets 1000Mbps operation. 95Only 96.Cm full-duplex 97mode is supported at this speed. 98.El 99.Pp 100The 101.Nm 102driver supports the following media options: 103.Bl -tag -width ".Cm full-duplex" 104.It Cm full-duplex 105Forces full-duplex operation 106.It Cm half-duplex 107Forces half-duplex operation. 108.El 109.Pp 110Only use 111.Cm mediaopt 112to set the driver to 113.Cm full-duplex . 114If 115.Cm mediaopt 116is not specified, the driver defaults to 117.Cm half-duplex . 118.Pp 119For more information on configuring this device, see 120.Xr ifconfig 8 . 121.Sh DIAGNOSTICS 122.Bl -diag 123.It "em%d: Unable to allocate bus resource: memory" 124A fatal initialization error has occurred. 125.It "em%d: Unable to allocate bus resource: interrupt" 126A fatal initialization error has occurred. 127.It "em%d: watchdog timeout -- resetting" 128The device has stopped responding to the network, or there is a problem with 129the network connection (cable). 130.El 131.Sh SUPPORT 132For additional information regarding building and installation, 133see the 134.Pa README 135included with the driver. 136For general information and support, 137go to the Intel support website at: 138.Pa http://support.intel.com . 139.Pp 140If an issue is identified with the released source code on the supported kernel 141with a supported adapter, email the specific information related to the 142issue to 143.Aq freebsdnic@mailbox.intel.com . 144.Sh SEE ALSO 145.Xr arp 4 , 146.Xr gx 4 , 147.Xr netintro 4 , 148.Xr ng_ether 4 , 149.Xr vlan 4 , 150.Xr ifconfig 8 151.Sh HISTORY 152The 153.Nm 154device driver first appeared in 155.Fx 4.4 . 156.Sh AUTHORS 157The 158.Nm 159driver was written by 160.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 161