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.\" $FreeBSD$ 33.\" 34.Dd January 30, 2005 35.Dt EM 4 36.Os 37.Sh NAME 38.Nm em 39.Nd "Intel(R) PRO/1000 Gigabit Ethernet adapter driver" 40.Sh SYNOPSIS 41.Cd "device em" 42.Sh DESCRIPTION 43The 44.Nm 45driver provides support for PCI Gigabit Ethernet adapters based on 46the Intel 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 4782546EB, 82546GB and 82547 Ethernet controller chips. 48The driver supports Transmit/Receive checksum offload 49and Jumbo Frames only on 82540, 82543, 82544 and 82546-based adapters. 50For further hardware information, 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.Fx . 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 HARDWARE 122The 123.Nm 124driver supports Gigabit Ethernet adapters based on the Intel 12582540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 82546EB, 12682546GB and 82547 controller chips: 127.Pp 128.Bl -bullet -compact 129.It 130Intel PRO/1000 CT Network Connection (82547) 131.It 132Intel PRO/1000 F Server Adapter (82543) 133.It 134Intel PRO/1000 Gigabit Server Adapter (82542) 135.It 136Intel PRO/1000 GT Desktop Adapter (82541PI) 137.It 138Intel PRO/1000 MF Dual Port Server Adapter (82546) 139.It 140Intel PRO/1000 MF Server Adapter (82545) 141.It 142Intel PRO/1000 MF Server Adapter (LX) (82545) 143.It 144Intel PRO/1000 MT Desktop Adapter (82540) 145.It 146Intel PRO/1000 MT Desktop Adapter (82541) 147.It 148Intel PRO/1000 MT Dual Port Server Adapter (82546) 149.It 150Intel PRO/1000 MT Quad Port Server Adapter (82546EB) 151.It 152Intel PRO/1000 MT Server Adapter (82545) 153.It 154Intel PRO/1000 T Desktop Adapter (82544) 155.It 156Intel PRO/1000 T Server Adapter (82543) 157.It 158Intel PRO/1000 XF Server Adapter (82544) 159.It 160Intel PRO/1000 XT Server Adapter (82544) 161.El 162.Sh DIAGNOSTICS 163.Bl -diag 164.It "em%d: Unable to allocate bus resource: memory" 165A fatal initialization error has occurred. 166.It "em%d: Unable to allocate bus resource: interrupt" 167A fatal initialization error has occurred. 168.It "em%d: watchdog timeout -- resetting" 169The device has stopped responding to the network, or there is a problem with 170the network connection (cable). 171.El 172.Sh SUPPORT 173For additional information regarding building and installation, 174see the 175.Pa README 176included with the driver. 177For general information and support, 178go to the Intel support website at: 179.Pa http://support.intel.com . 180.Pp 181If an issue is identified with the released source code on the supported kernel 182with a supported adapter, email the specific information related to the 183issue to 184.Aq freebsdnic@mailbox.intel.com . 185.Sh SEE ALSO 186.Xr arp 4 , 187.Xr netintro 4 , 188.Xr ng_ether 4 , 189.Xr polling 4 , 190.Xr vlan 4 , 191.Xr ifconfig 8 192.Sh HISTORY 193The 194.Nm 195device driver first appeared in 196.Fx 4.4 . 197.Sh AUTHORS 198The 199.Nm 200driver was written by 201.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 202.Sh BUGS 203Hardware-assisted VLAN processing is disabled by default. 204You can enable it on an 205.Nm 206interface using 207.Xr ifconfig 8 208unless you are going to run 209.Xr bridge 4 210on the interface. 211In any case, VLAN can operate safely without the hardware acceleration. 212