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 9000. 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. 67The 68.Cm mediaopt 69option can also be used to select either 70.Cm full-duplex 71or 72.Cm half-duplex 73modes. 74.It Cm 100baseTX 75Sets 100Mbps operation. 76The 77.Cm mediaopt 78option can also be used to select either 79.Cm full-duplex 80or 81.Cm half-duplex 82modes. 83.It Cm 1000baseSX 84Sets 1000Mbps operation. 85Only 86.Cm full-duplex 87mode is supported at this speed. 88.It Cm 1000baseTX 89Sets 1000Mbps operation. 90Only 91.Cm full-duplex 92mode is supported at this speed. 93.El 94.Pp 95The 96.Nm 97driver supports the following media options: 98.Bl -tag -width ".Cm full-duplex" 99.It Cm full-duplex 100Forces full duplex operation 101.It Cm half-duplex 102Forces half duplex operation. 103.El 104.Pp 105For more information on configuring this device, see 106.Xr ifconfig 8 . 107.Sh DIAGNOSTICS 108.Bl -diag 109.It "em%d: Unable to allocate bus resource: memory" 110A fatal initialization error has occurred. 111.It "em%d: Unable to allocate bus resource: interrupt" 112A fatal initialization error has occurred. 113.It "em%d: No memory for jumbo buffers!" 114The driver failed to allocate memory for jumbo frames during 115initialization. 116.It "em%d: watchdog timeout -- resetting" 117The device has stopped responding to the network, or there is a problem with 118the network connection (cable). 119.El 120.Sh SUPPORT 121For additional information regarding building and installation, 122see the 123.Pa README 124included with the driver. 125For general information and support, 126go to the Intel support Website at 127.Pa http://support.intel.com . 128.Pp 129If an issue is identified with the released source code on the supported kernel 130with a supported adapter, email the specific information related to the 131issue to 132.Aq freebsdnic@mailbox.intel.com . 133.Sh SEE ALSO 134.Xr arp 4 , 135.Xr netintro 4 , 136.Xr ng_ether 4 , 137.Xr vlan 4 , 138.Xr ifconfig 8 139.Sh HISTORY 140The 141.Nm 142device driver first appeared in 143.Fx 4.5 . 144.Sh AUTHORS 145The 146.Nm 147driver was written by 148.An Intel Corporation Aq freebsdnic@mailbox.intel.com . 149