| GEM(4) | Device Drivers Manual | GEM(4) |
gem — ERI/GEM/GMAC
Ethernet device driver
To compile this driver into the kernel, place the following lines in your kernel configuration file:
device miibus
device gemAlternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_gem_load="YES"
The gem driver provides support for the
GMAC Ethernet hardware found mostly in the last Apple PowerBooks G3s and
most G4-based Apple hardware, as well as Sun UltraSPARC machines.
All controllers supported by the gem
driver have TCP checksum offload capability for both receive and transmit,
support for the reception and transmission of extended frames for
vlan(4) and a 512-bit multicast hash filter.
Chips supported by the gem driver
include:
The following add-on cards are known to work with the
gem driver at this time:
On sparc64 the gem driver respects the
local-mac-address? system configuration variable which
can be set in the Open Firmware boot monitor using the
setenv command or by eeprom(8). If
set to “false” (the default), the
gem driver will use the system's default MAC address
for all of its devices. If set to
“true”, the unique MAC address of each
interface is used if present rather than the system's default MAC
address.
Supported interfaces having their own MAC address include the on-board Sun ERI 10/100 Mbps on boards equipped with more than one Ethernet interface and the Sun Gigabit Ethernet 2.0/3.0 GBE add-on cards.
altq(4), miibus(4), netintro(4), vlan(4), eeprom(8), ifconfig(8)
The gem device driver appeared in
NetBSD 1.6. The first
FreeBSD version to include it was
FreeBSD 5.0.
The gem driver was written for
NetBSD by Eduardo Horvath
<eeh@NetBSD.org>. It
was ported to FreeBSD by Thomas
Moestl
<tmm@FreeBSD.org> and
later on improved by Marius Strobl
<marius@FreeBSD.org>.
The man page was written by Thomas Klausner
<wiz@NetBSD.org>.
| December 25, 2009 | Debian |