$NetBSD: gem.4,v 1.2 2003/02/14 15:20:18 grant Exp $ Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditi...
NAMEgem - ERI/GEM/GMAC Ethernet device driver
SYNOPSISTo 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.conf5:
DESCRIPTIONThe sysctl Cm net.inet.tcp.syncookies 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 sysctl Cm net.inet.tcp.syncookies 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.
HARDWAREChips supported by the sysctl Cm net.inet.tcp.syncookies 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 sysctl Cm net.inet.tcp.syncookies 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)
NOTESOn sparc64 the sysctl Cm net.inet.tcp.syncookies 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 sysctl Cm net.inet.tcp.syncookies 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.