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 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.It 88Sun Gigabit Ethernet SBus 2.0/3.0 (GBE/S) 89(part no.\& 501-4375) 90.El 91.Sh NOTES 92On sparc64 the 93.Nm 94driver respects the 95.Va local-mac-address? 96system configuration variable which can be set in the Open Firmware boot 97monitor using the 98.Ic setenv 99command or by 100.Xr eeprom 8 . 101If set to 102.Dq Li false 103(the default), the 104.Nm 105driver will use the system's default MAC address for all of its devices. 106If set to 107.Dq Li true , 108the unique MAC address of each interface is used if present rather than 109the system's default MAC address. 110.Pp 111Supported interfaces having their own MAC address include the on-board 112Sun ERI 10/100 Mbps on boards equipped with more than one Ethernet interface 113and the Sun Gigabit Ethernet 2.0/3.0 GBE add-on cards. 114.Sh SEE ALSO 115.Xr altq 4 , 116.Xr miibus 4 , 117.Xr netintro 4 , 118.Xr vlan 4 , 119.Xr eeprom 8 , 120.Xr ifconfig 8 121.Sh HISTORY 122The 123.Nm 124device driver appeared in 125.Nx 1.6 . 126The first 127.Fx 128version to include it was 129.Fx 5.0 . 130.Sh AUTHORS 131.An -nosplit 132The 133.Nm 134driver was written for 135.Nx 136by 137.An Eduardo Horvath 138.Aq eeh@NetBSD.org . 139It was ported to 140.Fx 141by 142.An Thomas Moestl 143.Aq tmm@FreeBSD.org 144and later on improved by 145.An Marius Strobl 146.Aq marius@FreeBSD.org . 147The man page was written by 148.An Thomas Klausner 149.Aq wiz@NetBSD.org . 150