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.Dd April 5, 2002 31.Dt EM 4 32.Os 33.Sh NAME 34.Nm em 35.Nd "Intel(R) PRO/1000 gigabit Ethernet driver for the FreeBSD operating system" 36.Sh SYNOPSIS 37.Cd "device em" 38.Sh DESCRIPTION 39The 40.Nm 41driver provides support for PCI gigabit Ethernet adapters based on 42the Intel 82540, 82542, 82543 and 82544 Ethernet controller chip. 43The driver supports Transmit/Receive checksum offload 44and Jumbo Frames only on 82540, 82543 and 82544-based adapters. 45For a list of supported adapters, see the 46.Pa README 47included with the driver. 48.Pp 49For questions related to hardware requirements, 50refer to the documentation supplied with your Intel PRO/1000 adapter. 51All hardware requirements listed apply to use with 52.Fx . 53.Pp 54Support for Jumbo Frames is provided via the interface MTU setting. 55Selecting an MTU larger than 1500 bytes with the 56.Xr ifconfig 8 57utility configures the adapter to receive and transmit Jumbo Frames. 58The maximum MTU size for Jumbo Frames is 16114. 59.Pp 60The 61.Nm 62driver supports the following media types: 63.Bl -tag -width ".Cm 10baseT/UTP" 64.It Cm autoselect 65Enables auto-negotiation for speed and duplex. 66.It Cm 10baseT/UTP 67Sets 10Mbps operation. 68Use the 69.Cm mediaopt 70option to select 71.Cm full-duplex 72mode. 73.It Cm 100baseTX 74Sets 100Mbps operation. 75Use the 76.Cm mediaopt 77option to select 78.Cm full-duplex 79mode. 80.It Cm 1000baseSX 81Sets 1000Mbps operation. 82Only 83.Cm full-duplex 84mode is supported at this speed. 85.It Cm 1000baseTX 86Sets 1000Mbps operation. 87Only 88.Cm full-duplex 89mode is supported at this speed. 90.El 91.Pp 92The 93.Nm 94driver supports the following media options: 95.Bl -tag -width ".Cm full-duplex" 96.It Cm full-duplex 97Forces full-duplex operation 98.It Cm half-duplex 99Forces half-duplex operation. 100.El 101.Pp 102Only use 103.Cm mediaopt 104to set the driver to 105.Cm full-duplex . 106If 107.Cm mediaopt 108is not specified, the driver defaults to 109.Cm half-duplex . 110.Pp 111For more information on configuring this device, see 112.Xr ifconfig 8 . 113.Sh DIAGNOSTICS 114.Bl -diag 115.It "em%d: Unable to allocate bus resource: memory" 116A fatal initialization error has occurred. 117.It "em%d: Unable to allocate bus resource: interrupt" 118A fatal initialization error has occurred. 119.It "em%d: watchdog timeout -- resetting" 120The device has stopped responding to the network, or there is a problem with 121the network connection (cable). 122.El 123.Sh SUPPORT 124For additional information regarding building and installation, 125see the 126.Pa README 127included with the driver. 128For general information and support, 129go to the Intel support website at: 130.Pa http://support.intel.com. 131.Pp 132If an issue is identified with the released source code on the supported kernel 133with a supported adapter, email the specific information related to the 134issue to 135.Aq freebsdnic@mailbox.intel.com. 136.Sh SEE ALSO 137.Xr arp 4 , 138.Xr netintro 4 , 139.Xr vlan 4 , 140.Xr ng_ether 4 , 141.Xr ifconfig 8 142.Sh HISTORY 143The 144.Nm 145device driver first appeared in 146.Fx 4.4 . 147.Sh AUTHORS 148The 149.Nm 150driver was written by 151.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 152