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 July 16, 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 41To compile support for the 42.Nm 43driver into your kernel, place the following line in your 44kernel configuration file: 45.Bd -ragged -offset indent 46.Cd "device em" 47.Ed 48.Pp 49Alternatively, to load the 50.Nm 51driver at boot time, place the following line in 52.Xr loader.conf 5 : 53.Bd -literal -offset indent 54if_em_load="YES" 55.Ed 56.Sh DESCRIPTION 57The 58.Nm 59driver provides support for PCI Gigabit Ethernet adapters based on 60the Intel 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 6182546EB, 82546GB, 82547 and 82573 Ethernet controller chips. 62The driver supports Transmit/Receive checksum offload 63and Jumbo Frames only on 82540, 82543, 82544 and 82546-based adapters. 64For further hardware information, see the 65.Pa README 66included with the driver. 67.Pp 68For questions related to hardware requirements, 69refer to the documentation supplied with your Intel PRO/1000 adapter. 70All hardware requirements listed apply to use with 71.Fx . 72.Pp 73Support for Jumbo Frames is provided via the interface MTU setting. 74Selecting an MTU larger than 1500 bytes with the 75.Xr ifconfig 8 76utility configures the adapter to receive and transmit Jumbo Frames. 77The maximum MTU size for Jumbo Frames is 16114. 78.Pp 79This driver version supports VLANs. 80For information on enabling VLANs, see the 81.Pa README . 82The 83.Nm 84driver supports the following media types: 85.Bl -tag -width ".Cm 10baseT/UTP" 86.It Cm autoselect 87Enables auto-negotiation for speed and duplex. 88.It Cm 10baseT/UTP 89Sets 10Mbps operation. 90Use the 91.Cm mediaopt 92option to select 93.Cm full-duplex 94mode. 95.It Cm 100baseTX 96Sets 100Mbps operation. 97Use the 98.Cm mediaopt 99option to select 100.Cm full-duplex 101mode. 102.It Cm 1000baseSX 103Sets 1000Mbps operation. 104Only 105.Cm full-duplex 106mode is supported at this speed. 107.It Cm 1000baseTX 108Sets 1000Mbps operation. 109Only 110.Cm full-duplex 111mode is supported at this speed. 112.El 113.Pp 114The 115.Nm 116driver supports the following media options: 117.Bl -tag -width ".Cm full-duplex" 118.It Cm full-duplex 119Forces full-duplex operation 120.It Cm half-duplex 121Forces half-duplex operation. 122.El 123.Pp 124Only use 125.Cm mediaopt 126to set the driver to 127.Cm full-duplex . 128If 129.Cm mediaopt 130is not specified, the driver defaults to 131.Cm half-duplex . 132.Pp 133For more information on configuring this device, see 134.Xr ifconfig 8 . 135.Sh HARDWARE 136The 137.Nm 138driver supports Gigabit Ethernet adapters based on the Intel 13982540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 82546EB, 14082546GB, 82547 and 82573 controller chips: 141.Pp 142.Bl -bullet -compact 143.It 144Intel PRO/1000 CT Network Connection (82547) 145.It 146Intel PRO/1000 F Server Adapter (82543) 147.It 148Intel PRO/1000 Gigabit Server Adapter (82542) 149.It 150Intel PRO/1000 GT Desktop Adapter (82541PI) 151.It 152Intel PRO/1000 MF Dual Port Server Adapter (82546) 153.It 154Intel PRO/1000 MF Server Adapter (82545) 155.It 156Intel PRO/1000 MF Server Adapter (LX) (82545) 157.It 158Intel PRO/1000 MT Desktop Adapter (82540) 159.It 160Intel PRO/1000 MT Desktop Adapter (82541) 161.It 162Intel PRO/1000 MT Dual Port Server Adapter (82546) 163.It 164Intel PRO/1000 MT Quad Port Server Adapter (82546EB) 165.It 166Intel PRO/1000 MT Server Adapter (82545) 167.It 168Intel PRO/1000 T Desktop Adapter (82544) 169.It 170Intel PRO/1000 T Server Adapter (82543) 171.It 172Intel PRO/1000 XF Server Adapter (82544) 173.It 174Intel PRO/1000 XT Server Adapter (82544) 175.El 176.Sh DIAGNOSTICS 177.Bl -diag 178.It "em%d: Unable to allocate bus resource: memory" 179A fatal initialization error has occurred. 180.It "em%d: Unable to allocate bus resource: interrupt" 181A fatal initialization error has occurred. 182.It "em%d: watchdog timeout -- resetting" 183The device has stopped responding to the network, or there is a problem with 184the network connection (cable). 185.El 186.Sh SUPPORT 187For additional information regarding building and installation, 188see the 189.Pa README 190included with the driver. 191For general information and support, 192go to the Intel support website at: 193.Pa http://support.intel.com . 194.Pp 195If an issue is identified with the released source code on the supported kernel 196with a supported adapter, email the specific information related to the 197issue to 198.Aq freebsdnic@mailbox.intel.com . 199.Sh SEE ALSO 200.Xr arp 4 , 201.Xr netintro 4 , 202.Xr ng_ether 4 , 203.Xr polling 4 , 204.Xr vlan 4 , 205.Xr ifconfig 8 206.Sh HISTORY 207The 208.Nm 209device driver first appeared in 210.Fx 4.4 . 211.Sh AUTHORS 212The 213.Nm 214driver was written by 215.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 216.Sh BUGS 217Hardware-assisted VLAN processing is disabled by default. 218You can enable it on an 219.Nm 220interface using 221.Xr ifconfig 8 . 222