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