1.\" Copyright (c) 2001 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.\" $FreeBSD$ 28.Dd December, 2001 29.Dt EM 4 30.Os FreeBSD 31.Sh NAME 32.Nm em 33.Nd 34Intel(R) PRO/1000 gigabit Ethernet driver for the FreeBSD operating system 35.Sh SYNOPSIS 36.Cd "device em" 37.Sh DESCRIPTION 38The 39.Nm 40driver provides support for PCI gigabit Ethernet adapters based on 41the Intel 82542, 82543 and 82544 Ethernet controller chip. 42The driver supports Transmit/Receive checksum offload 43and Jumbo Frames only on 82543 and 82544-based adapters. 44For a list of supported adapters, see the README 45included with the driver. 46.Pp 47For questions related to hardware requirements, 48refer to the documentation supplied with your Intel PRO/1000 adapter. 49All hardware requirements listed apply to use with FreeBSD. 50.Pp 51Support for Jumbo Frames is provided via the interface MTU setting. 52Selecting an MTU larger than 1500 bytes with the 53.Xr ifconfig 8 54utility configures the adapter to receive and transmit Jumbo Frames. 55The maximum MTU size for Jumbo Frames is 16114. 56.Pp 57The 58.Nm 59driver supports the following media types: 60.Pp 61.Bl -tag -width xxxxxxxxxxxxxxxxxxxx 62.It autoselect 63Enables auto-negotiation for speed and duplex. 64.It 10baseT/UTP 65Sets 10Mbps operation. 66Use the 67.Ar mediaopt 68option to select 69.Ar full-duplex 70mode. 71.It 100baseTX 72Sets 100Mbps operation. 73Use the 74.Ar mediaopt 75option to select 76.Ar full-duplex 77mode. 78.It 1000baseSX 79Sets 1000Mbps operation. 80Only 81.Ar full-duplex 82mode is supported at this speed. 83.It 1000baseTX 84Sets 1000Mbps operation. 85Only 86.Ar full-duplex 87mode is supported at this speed. 88.El 89.Pp 90The 91.Nm 92driver supports the following media options: 93.Pp 94.Bl -tag -width xxxxxxxxxxxxxxxxxxxx 95.It full-duplex 96Forces full-duplex operation 97.It half-duplex 98Forces half-duplex operation. 99.El 100.Pp 101Only use mediaopt to set the driver to full-duplex. If mediaopt is not specified, the driver defaults to half-duplex. 102.Pp 103For more information on configuring this device, see 104.Xr ifconfig 8 . 105.Sh DIAGNOSTICS 106.Bl -diag 107.It "em%d: Unable to allocate bus resource: memory" 108A fatal initialization error has occurred. 109.It "em%d: Unable to allocate bus resource: interrupt" 110A fatal initialization error has occurred. 111.It "em%d: watchdog timeout -- resetting" 112The device has stopped responding to the network, or there is a problem with 113the network connection (cable). 114.El 115.Sh SUPPORT 116For additional information regarding building and installation, 117see the README included with the driver. For general information and support, 118go to the Intel support website at: 119.Ar http://support.intel.com. 120.Pp 121If an issue is identified with the released source code on the supported kernel 122with a supported adapter, email the specific information related to the 123issue to freebsdnic@mailbox.intel.com. 124.El 125.Sh SEE ALSO 126.Xr arp 4 , 127.Xr netintro 4 , 128.Xr vlan 4 , 129.Xr ng_ether 4 , 130.Xr ifconfig 8 131.Sh HISTORY 132The 133.Nm 134device driver first appeared in 135.Fx 4.4 . 136.Sh AUTHORS 137The 138.Nm 139driver was written by 140.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 141