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 April 18, 2023 30.Dt GEM 4 31.Os 32.Sh NAME 33.Nm gem 34.Nd 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. 55.Pp 56All controllers supported by the 57.Nm 58driver have TCP checksum offload capability for both receive and transmit, 59support for the reception and transmission of extended frames for 60.Xr vlan 4 61and a 512-bit multicast hash filter. 62.Sh HARDWARE 63Chips supported by the 64.Nm 65driver include: 66.Pp 67.Bl -bullet -compact 68.It 69Apple GMAC 70.It 71Sun GEM Gigabit Ethernet 72.El 73.Pp 74The 75following add-on cards are known to work with the 76.Nm 77driver at this time: 78.Pp 79.Bl -bullet -compact 80.It 81Sun Gigabit Ethernet PCI 2.0/3.0 (GBE/P) 82(part no.\& 501-4373) 83.El 84.Sh SEE ALSO 85.Xr altq 4 , 86.Xr miibus 4 , 87.Xr netintro 4 , 88.Xr vlan 4 , 89.Xr ifconfig 8 90.Sh HISTORY 91The 92.Nm 93device driver appeared in 94.Nx 1.6 . 95The first 96.Fx 97version to include it was 98.Fx 5.0 . 99.Sh AUTHORS 100.An -nosplit 101The 102.Nm 103driver was written for 104.Nx 105by 106.An Eduardo Horvath Aq Mt eeh@NetBSD.org . 107It was ported to 108.Fx 109by 110.An Thomas Moestl Aq Mt tmm@FreeBSD.org 111and later on improved by 112.An Marius Strobl Aq Mt marius@FreeBSD.org . 113The man page was written by 114.An Thomas Klausner Aq Mt wiz@NetBSD.org . 115