NAME¶
gem
—
ERI/GEM/GMAC Ethernet device driver
SYNOPSIS¶
To compile this driver into the kernel, place the following lines in your kernel
configuration file:
device miibus
device gem
Alternatively, to load the driver as a module at boot time, place the following
line in
loader.conf(5):
DESCRIPTION¶
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.
HARDWARE¶
Chips supported by the
gem
driver include:
- Apple GMAC
- Sun ERI 10/100 Mbps Ethernet
- Sun GEM Gigabit Ethernet
The following add-on cards are known to work with the
gem
driver at this time:
- Sun Gigabit Ethernet PCI 2.0/3.0 (GBE/P) (part no. 501-4373)
- Sun Gigabit Ethernet SBus 2.0/3.0 (GBE/S) (part no. 501-4375)
NOTES¶
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.
SEE ALSO¶
altq(4),
miibus(4),
netintro(4),
vlan(4),
eeprom(8),
ifconfig(8)
HISTORY¶
The
gem
device driver appeared in
NetBSD 1.6. The first
FreeBSD
version to include it was
FreeBSD 5.0.
AUTHORS¶
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⟩.