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.Dd April 18, 2023 28.Dt GEM 4 29.Os 30.Sh NAME 31.Nm gem 32.Nd GEM/GMAC Ethernet device driver 33.Sh SYNOPSIS 34To compile this driver into the kernel, 35place the following lines in your 36kernel configuration file: 37.Bd -ragged -offset indent 38.Cd "device miibus" 39.Cd "device gem" 40.Ed 41.Pp 42Alternatively, to load the driver as a 43module at boot time, place the following line in 44.Xr loader.conf 5 : 45.Bd -literal -offset indent 46if_gem_load="YES" 47.Ed 48.Sh DESCRIPTION 49The 50.Nm 51driver provides support for the GMAC Ethernet hardware found mostly in 52the last Apple PowerBooks G3s and most G4-based Apple hardware. 53.Pp 54All controllers supported by the 55.Nm 56driver have TCP checksum offload capability for both receive and transmit, 57support for the reception and transmission of extended frames for 58.Xr vlan 4 59and a 512-bit multicast hash filter. 60.Sh HARDWARE 61Chips supported by the 62.Nm 63driver include: 64.Pp 65.Bl -bullet -compact 66.It 67Apple GMAC 68.It 69Sun GEM Gigabit Ethernet 70.El 71.Pp 72The 73following add-on cards are known to work with the 74.Nm 75driver at this time: 76.Pp 77.Bl -bullet -compact 78.It 79Sun Gigabit Ethernet PCI 2.0/3.0 (GBE/P) 80(part no.\& 501-4373) 81.El 82.Sh SEE ALSO 83.Xr altq 4 , 84.Xr miibus 4 , 85.Xr netintro 4 , 86.Xr vlan 4 , 87.Xr ifconfig 8 88.Sh HISTORY 89The 90.Nm 91device driver appeared in 92.Nx 1.6 . 93The first 94.Fx 95version to include it was 96.Fx 5.0 . 97.Sh AUTHORS 98.An -nosplit 99The 100.Nm 101driver was written for 102.Nx 103by 104.An Eduardo Horvath Aq Mt eeh@NetBSD.org . 105It was ported to 106.Fx 107by 108.An Thomas Moestl Aq Mt tmm@FreeBSD.org 109and later on improved by 110.An Marius Strobl Aq Mt marius@FreeBSD.org . 111The man page was written by 112.An Thomas Klausner Aq Mt wiz@NetBSD.org . 113