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 casAlternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_cas_load="YES"
DESCRIPTION
Thecas 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)
SEE ALSO
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.