NAME¶
cas
—
Sun Cassini/Cassini+ and National Semiconductor
DP83065 Saturn Gigabit Ethernet driver
SYNOPSIS¶
To compile this driver into the kernel, place the following lines in your kernel
configuration file:
device miibus
device cas
Alternatively, to load the driver as a module at boot time, place the following
line in
loader.conf(5):
DESCRIPTION¶
The
cas
driver provides support for the Sun
Cassini/Cassini+ and National Semiconductor DP83065 Saturn Gigabit Ethernet
controllers found on-board in Sun UltraSPARC machines and as add-on cards.
All controllers supported by the
cas
driver
have TCP/UDP checksum offload capability for both receive and transmit,
support for the reception and transmission of extended frames for
vlan(4) and an interrupt coalescing/moderation
mechanism as well as a 512-bit multicast hash filter.
The
cas
driver also supports Jumbo Frames (up
to 9022 bytes), which can be configured via the interface MTU setting.
Selecting an MTU larger than 1500 bytes with the
ifconfig(8) utility configures the adapter to
receive and transmit Jumbo Frames.
HARDWARE¶
The chips supported by the
cas
driver are:
- National Semiconductor DP83065 Saturn Gigabit Ethernet
- Sun Cassini Gigabit Ethernet
- Sun Cassini+ Gigabit Ethernet
The following add-on cards are known to work with the
cas
driver at this time:
- Sun GigaSwift Ethernet 1.0 MMF (Cassini Kuheen) (part no. 501-5524)
- Sun GigaSwift Ethernet 1.0 UTP (Cassini) (part no. 501-5902)
- Sun GigaSwift Ethernet UTP (GCS) (part no. 501-6719)
- Sun Quad GigaSwift Ethernet UTP (QGE) (part no. 501-6522)
- Sun Quad GigaSwift Ethernet PCI-X (QGE-X) (part no. 501-6738)
NOTES¶
On sparc64 the
cas
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
cas
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 on-board versions on
boards equipped with more than one Ethernet interface and all add-on cards.
SEE ALSO¶
altq(4),
miibus(4),
netintro(4),
vlan(4),
eeprom(8),
ifconfig(8)
HISTORY¶
The
cas
device driver appeared in
FreeBSD 8.0 and
FreeBSD 7.3.
It is named after the
cas
driver which
first appeared in
OpenBSD 4.1 and supports the same
set of controllers but is otherwise unrelated.
AUTHORS¶
The
cas
driver was written by
Marius Strobl
⟨marius@FreeBSD.org⟩ based on the
gem(4) driver.