1.\" $OpenBSD: gem.4,v 1.18 2008/10/14 17:14:49 brad Exp $ 2.\" 3.\" Copyright (c) 2001 Miodrag Vallat. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistribution of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" 27.Dd $Mdocdate: October 14 2008 $ 28.Dt GEM 4 29.Os 30.Sh NAME 31.Nm gem 32.Nd GEM 10/100/Gigabit Ethernet device 33.Sh SYNOPSIS 34.Cd "gem* at pci?" 35.Cd "gem* at sbus?" 36.Cd "bmtphy* at mii?" 37.Cd "brgphy* at mii?" 38.Cd "eephy* at mii?" 39.Cd "gentbi* at mii?" 40.Cd "luphy* at mii?" 41.Cd "lxtphy* at mii?" 42.Sh DESCRIPTION 43The 44.Nm 45driver provides support for various NICs based on the GEM Ethernet controller 46chips, including the following: 47.Pp 48.Bl -bullet -compact -offset indent 49.It 50Apple GMAC (10/100/1000baseT) 51.It 52Sun ERI (10/100baseT) 53.It 54Sun GEM (10/100/1000baseT) 55.It 56Sun GEM (1000baseSX) 57.El 58.Pp 59It uses an external PHY or an external 10-bit interface. 60.Pp 61The 62.Nm 63driver supports several media types, which are selected via the 64.Xr ifconfig 8 65command. 66The supported media types are: 67.Bl -tag -width "media" -offset indent 68.It media autoselect 69Attempt to autoselect the media type (default) 70.It media 1000baseT mediaopt full-duplex 71Use 1000baseT on copper, full duplex 72.It media 1000baseT Op mediaopt half-duplex 73Use 1000baseT on copper, half duplex 74.It media 1000baseSX mediaopt full-duplex 75Use 1000baseSX on fiber, full duplex 76.It media 1000baseSX Op mediaopt half-duplex 77Use 1000baseSX on fiber, half duplex 78.It media 100baseTX mediaopt full-duplex 79Use 100baseTX, full duplex 80.It media 100baseTX Op mediaopt half-duplex 81Use 100baseTX, half duplex 82.It media 10baseT mediaopt full-duplex 83Use 10baseT, full duplex 84.It media 10baseT Op mediaopt half-duplex 85Use 10baseT, half duplex 86.El 87.Sh SEE ALSO 88.Xr arp 4 , 89.Xr bmtphy 4 , 90.Xr brgphy 4 , 91.Xr eephy 4 , 92.Xr gentbi 4 , 93.Xr ifmedia 4 , 94.Xr inet 4 , 95.Xr intro 4 , 96.Xr luphy 4 , 97.Xr lxtphy 4 , 98.Xr netintro 4 , 99.Xr hostname.if 5 , 100.Xr ifconfig 8 101.Sh HISTORY 102.Ox 103support for 104.Nm 105first appeared in 106.Ox 3.0 . 107