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.\" 29.Dd December 8, 2001 30.Dt EM 4 31.Os 32.Sh NAME 33.Nm em 34.Nd "Intel(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 45.Pa README 46included with the driver. 47.Pp 48For questions related to hardware requirements, 49refer to the documentation supplied with your Intel PRO/1000 adapter. 50All hardware requirements listed apply to use with 51.Fx . 52.Pp 53Support for Jumbo Frames is provided via the interface MTU setting. 54Selecting an MTU larger than 1500 bytes with the 55.Xr ifconfig 8 56utility configures the adapter to receive and transmit Jumbo Frames. 57The maximum MTU size for Jumbo Frames is 16114. 58.Pp 59The 60.Nm 61driver supports the following media types: 62.Bl -tag -width ".Cm 10baseT/UTP" 63.It Cm autoselect 64Enables auto-negotiation for speed and duplex. 65.It Cm 10baseT/UTP 66Sets 10Mbps operation. 67Use the 68.Cm mediaopt 69option to select 70.Cm full-duplex 71mode. 72.It Cm 100baseTX 73Sets 100Mbps operation. 74Use the 75.Cm mediaopt 76option to select 77.Cm full-duplex 78mode. 79.It Cm 1000baseSX 80Sets 1000Mbps operation. 81Only 82.Cm full-duplex 83mode is supported at this speed. 84.It Cm 1000baseTX 85Sets 1000Mbps operation. 86Only 87.Cm full-duplex 88mode is supported at this speed. 89.El 90.Pp 91The 92.Nm 93driver supports the following media options: 94.Bl -tag -width ".Cm full-duplex" 95.It Cm full-duplex 96Forces full-duplex operation 97.It Cm half-duplex 98Forces half-duplex operation. 99.El 100.Pp 101Only use 102.Cm mediaopt 103to set the driver to 104.Cm full-duplex . 105If 106.Cm mediaopt 107is not specified, the driver defaults to 108.Cm half-duplex . 109.Pp 110For more information on configuring this device, see 111.Xr ifconfig 8 . 112.Sh DIAGNOSTICS 113.Bl -diag 114.It "em%d: Unable to allocate bus resource: memory" 115A fatal initialization error has occurred. 116.It "em%d: Unable to allocate bus resource: interrupt" 117A fatal initialization error has occurred. 118.It "em%d: watchdog timeout -- resetting" 119The device has stopped responding to the network, or there is a problem with 120the network connection (cable). 121.El 122.Sh SUPPORT 123For additional information regarding building and installation, 124see the 125.Pa README 126included with the driver. 127For general information and support, 128go to the Intel support website at: 129.Pa http://support.intel.com . 130.Pp 131If an issue is identified with the released source code on the supported kernel 132with a supported adapter, email the specific information related to the 133issue to 134.Aq freebsdnic@mailbox.intel.com . 135.Sh SEE ALSO 136.Xr arp 4 , 137.Xr netintro 4 , 138.Xr ng_ether 4 , 139.Xr vlan 4 , 140.Xr ifconfig 8 141.Sh HISTORY 142The 143.Nm 144device driver first appeared in 145.Fx 4.4 . 146.Sh AUTHORS 147The 148.Nm 149driver was written by 150.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 151