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.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd December 25, 2009 30.Dt GEM 4 31.Os 32.Sh NAME 33.Nm gem 34.Nd ERI/GEM/GMAC Ethernet device driver 35.Sh SYNOPSIS 36To compile this driver into the kernel, 37place the following lines in your 38kernel configuration file: 39.Bd -ragged -offset indent 40.Cd "device miibus" 41.Cd "device gem" 42.Ed 43.Pp 44Alternatively, to load the driver as a 45module at boot time, place the following line in 46.Xr loader.conf 5 : 47.Bd -literal -offset indent 48if_gem_load="YES" 49.Ed 50.Sh DESCRIPTION 51The 52.Nm 53driver provides support for the GMAC Ethernet hardware found mostly in 54the last Apple PowerBooks G3s and most G4-based Apple hardware, as 55well as Sun UltraSPARC machines. 56.Pp 57All controllers supported by the 58.Nm 59driver have TCP checksum offload capability for both receive and transmit, 60support for the reception and transmission of extended frames for 61.Xr vlan 4 62and a 512-bit multicast hash filter. 63.Sh HARDWARE 64Chips supported by the 65.Nm 66driver include: 67.Pp 68.Bl -bullet -compact 69.It 70Apple GMAC 71.It 72Sun ERI 10/100 Mbps Ethernet 73.It 74Sun GEM Gigabit Ethernet 75.El 76.Pp 77The 78following add-on cards are known to work with the 79.Nm 80driver at this time: 81.Pp 82.Bl -bullet -compact 83.It 84Sun Gigabit Ethernet PCI 2.0/3.0 (GBE/P) 85(part no.\& 501-4373) 86.It 87Sun Gigabit Ethernet SBus 2.0/3.0 (GBE/S) 88(part no.\& 501-4375) 89.El 90.Sh NOTES 91On sparc64 the 92.Nm 93driver respects the 94.Va local-mac-address? 95system configuration variable which can be set in the Open Firmware boot 96monitor using the 97.Ic setenv 98command or by 99.Xr eeprom 8 . 100If set to 101.Dq Li false 102(the default), the 103.Nm 104driver will use the system's default MAC address for all of its devices. 105If set to 106.Dq Li true , 107the unique MAC address of each interface is used if present rather than 108the system's default MAC address. 109.Pp 110Supported interfaces having their own MAC address include the on-board 111Sun ERI 10/100 Mbps on boards equipped with more than one Ethernet interface 112and the Sun Gigabit Ethernet 2.0/3.0 GBE add-on cards. 113.Sh SEE ALSO 114.Xr altq 4 , 115.Xr miibus 4 , 116.Xr netintro 4 , 117.Xr vlan 4 , 118.Xr eeprom 8 , 119.Xr ifconfig 8 120.Sh HISTORY 121The 122.Nm 123device driver appeared in 124.Nx 1.6 . 125The first 126.Fx 127version to include it was 128.Fx 5.0 . 129.Sh AUTHORS 130.An -nosplit 131The 132.Nm 133driver was written for 134.Nx 135by 136.An Eduardo Horvath 137.Aq eeh@NetBSD.org . 138It was ported to 139.Fx 140by 141.An Thomas Moestl 142.Aq tmm@FreeBSD.org 143and later on improved by 144.An Marius Strobl 145.Aq marius@FreeBSD.org . 146The man page was written by 147.An Thomas Klausner 148.Aq wiz@NetBSD.org . 149