1.\" $NetBSD: gem.4,v 1.2 2003/02/14 15:20:18 grant Exp $ 2.\" 3.\" Copyright (c) 2002 The NetBSD Foundation, Inc. 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. Redistributions 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.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the NetBSD 17.\" Foundation, Inc. and its contributors. 18.\" 4. Neither the name of The NetBSD Foundation nor the names of its 19.\" contributors may be used to endorse or promote products derived 20.\" from this software without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32.\" POSSIBILITY OF SUCH DAMAGE. 33.\" 34.\" $FreeBSD$ 35.\" 36.Dd September 26, 2007 37.Dt GEM 4 38.Os 39.Sh NAME 40.Nm gem 41.Nd ERI/GEM/GMAC Ethernet device driver 42.Sh SYNOPSIS 43To compile this driver into the kernel, 44place the following lines in your 45kernel configuration file: 46.Bd -ragged -offset indent 47.Cd "device miibus" 48.Cd "device gem" 49.Ed 50.Pp 51Alternatively, to load the driver as a 52module at boot time, place the following line in 53.Xr loader.conf 5 : 54.Bd -literal -offset indent 55if_gem_load="YES" 56.Ed 57.Sh DESCRIPTION 58The 59.Nm 60driver provides support for the GMac Ethernet hardware found mostly in 61the last Apple PowerBooks G3s and most G4-based Apple hardware, as 62well as many Sun UltraSPARCs. 63.Sh HARDWARE 64.Pp 65Chips supported by the 66.Nm 67driver include: 68.Pp 69.Bl -bullet -compact 70.It 71Apple GMAC 72.It 73Sun ERI 10/100 Mbps Ethernet 74.It 75Sun GEM Gigabit Ethernet 76.El 77.Pp 78The 79following add-on cards are known to work with the 80.Nm 81driver at this time: 82.Pp 83.Bl -bullet -compact 84.It 85Sun Gigabit Ethernet PCI 2.0/3.0 (GBE/P) 86(part no.\& 501-4373) 87.El 88.Sh NOTES 89On sparc64 the 90.Nm 91driver respects the 92.Va local-mac-address? 93system configuration variable which can be set in the Open Firmware boot 94monitor using the 95.Ic setenv 96command or by 97.Xr eeprom 8 . 98If set to 99.Dq Li false 100(the default), the 101.Nm 102driver will use the system's default MAC address for all of its devices. 103If set to 104.Dq Li true , 105the unique MAC address of each interface is used if present rather than 106the system's default MAC address. 107.Pp 108Supported interfaces having their own MAC address include the on-board 109Sun ERI 10/100 Mbps on boards equipped with more than one Ethernet interface 110and the Sun Gigabit Ethernet 2.0/3.0 GBE add-on cards. 111.Sh CAVEATS 112Currently the 113.Nm 114driver fails to attach to Sun Gigabit Ethernet SBus 2.0/3.0 (GBE/S) cards, 115as no SBus front-end has been written so far. 116.Sh SEE ALSO 117.Xr altq 4 , 118.Xr hme 4 , 119.Xr miibus 4 , 120.Xr netintro 4 , 121.Xr eeprom 8 , 122.Xr ifconfig 8 123.Sh HISTORY 124The 125.Nm 126device driver appeared in 127.Nx 1.6 . 128The first 129.Fx 130version to include it was 131.Fx 5.0 . 132.Sh AUTHORS 133.An -nosplit 134The 135.Nm 136driver was written by 137.An Eduardo Horvath 138.Aq eeh@NetBSD.org . 139The man page was written by 140.An Thomas Klausner 141.Aq wiz@NetBSD.org . 142