1.\" $OpenBSD: gem.4,v 1.17 2007/05/31 19:19:50 jmc 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: May 31 2007 $ 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 "lxtphy* at mii?" 41.Sh DESCRIPTION 42The 43.Nm 44driver provides support for various NICs based on the GEM Ethernet controller 45chips, including the following: 46.Pp 47.Bl -bullet -compact -offset indent 48.It 49Apple GMAC (10/100/1000baseT) 50.It 51Sun ERI (10/100baseT) 52.It 53Sun GEM (10/100/1000baseT) 54.It 55Sun GEM (1000baseSX) 56.El 57.Pp 58It uses an external PHY or an external 10-bit interface. 59.Pp 60The 61.Nm 62driver supports several media types, which are selected via the 63.Xr ifconfig 8 64command. 65The supported media types are: 66.Bl -tag -width "media" -offset indent 67.It media autoselect 68Attempt to autoselect the media type (default) 69.It media 1000baseT mediaopt full-duplex 70Use 1000baseT on copper, full duplex 71.It media 1000baseT Op mediaopt half-duplex 72Use 1000baseT on copper, half duplex 73.It media 1000baseSX mediaopt full-duplex 74Use 1000baseSX on fiber, full duplex 75.It media 1000baseSX Op mediaopt half-duplex 76Use 1000baseSX on fiber, half duplex 77.It media 100baseTX mediaopt full-duplex 78Use 100baseTX, full duplex 79.It media 100baseTX Op mediaopt half-duplex 80Use 100baseTX, half duplex 81.It media 10baseT mediaopt full-duplex 82Use 10baseT, full duplex 83.It media 10baseT Op mediaopt half-duplex 84Use 10baseT, half duplex 85.El 86.Sh SEE ALSO 87.Xr arp 4 , 88.Xr bmtphy 4 , 89.Xr brgphy 4 , 90.Xr eephy 4 , 91.Xr gentbi 4 , 92.Xr ifmedia 4 , 93.Xr inet 4 , 94.Xr intro 4 , 95.Xr lxtphy 4 , 96.Xr netintro 4 , 97.Xr hostname.if 5 , 98.Xr ifconfig 8 99.Sh HISTORY 100.Ox 101support for 102.Nm 103first appeared in 104.Ox 3.0 . 105