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 26, 2020 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.El 87.Sh SEE ALSO 88.Xr altq 4 , 89.Xr miibus 4 , 90.Xr netintro 4 , 91.Xr vlan 4 , 92.Xr ifconfig 8 93.Sh HISTORY 94The 95.Nm 96device driver appeared in 97.Nx 1.6 . 98The first 99.Fx 100version to include it was 101.Fx 5.0 . 102.Sh AUTHORS 103.An -nosplit 104The 105.Nm 106driver was written for 107.Nx 108by 109.An Eduardo Horvath Aq Mt eeh@NetBSD.org . 110It was ported to 111.Fx 112by 113.An Thomas Moestl Aq Mt tmm@FreeBSD.org 114and later on improved by 115.An Marius Strobl Aq Mt marius@FreeBSD.org . 116The man page was written by 117.An Thomas Klausner Aq Mt wiz@NetBSD.org . 118