NAME
sk,
skc,
msk,
mskc —
SysKonnect XMAC II and Marvell
GMAC based gigabit ethernet
SYNOPSIS
skc* at pci? dev ? function ?
sk* at skc?
mskc* at pci? dev ? function ?
msk* at mskc?
DESCRIPTION
The
sk driver provides support for SysKonnect based gigabit
ethernet adapters and Marvell based gigabit ethernet adapters, including the
following:
- SK-9821 SK-NET GE-T single
port, copper adapter
- SK-9822 SK-NET GE-T dual
port, copper adapter
- SK-9841 SK-NET GE-LX single
port, single mode fiber adapter
- SK-9842 SK-NET GE-LX dual
port, single mode fiber adapter
- SK-9843 SK-NET GE-SX single
port, multimode fiber adapter
- SK-9844 SK-NET GE-SX dual
port, multimode fiber adapter
- SK-9521 V2.0 single port,
copper adapter (32-bit)
- SK-9821 V2.0 single port,
copper adapter
- SK-9843 V2.0 single port,
copper adapter
- 3Com 3c940 single port,
copper adapter
- Belkin Gigabit Desktop
Network PCI Card, single port, copper (32-bit)
- D-Link DGE-530T single port,
copper adapter
- Linksys EG1032v2
single-port, copper adapter
- Linksys EG1064v2
single-port, copper adapter
The
msk driver provides support for the Marvell Yukon-2 based
Gigabit Ethernet adapters, including the following:
- Marvell Yukon 88E8035,
copper adapter
- Marvell Yukon 88E8036,
copper adapter
- Marvell Yukon 88E8038,
copper adapter
- Marvell Yukon 88E8050,
copper adapter
- Marvell Yukon 88E8052,
copper adapter
- Marvell Yukon 88E8053,
copper adapter
- Marvell Yukon 88E8055,
copper adapter
- SK-9E21 1000Base-T single
port, copper adapter
- SK-9E22 1000Base-T dual
port, copper adapter
- SK-9E81 1000Base-SX single
port, multimode fiber adapter
- SK-9E82 1000Base-SX dual
port, multimode fiber adapter
- SK-9E91 1000Base-LX single
port, single mode fiber adapter
- SK-9E92 1000Base-LX dual
port, single mode fiber adapter
- SK-9S21 1000Base-T single
port, copper adapter
- SK-9S22 1000Base-T dual
port, copper adapter
- SK-9S81 1000Base-SX single
port, multimode fiber adapter
- SK-9S82 1000Base-SX dual
port, multimode fiber adapter
- SK-9S91 1000Base-LX single
port, single mode fiber adapter
- SK-9S92 1000Base-LX dual
port, single mode fiber adapter
- SK-9E21D 1000Base-T single
port, copper adapter
The SysKonnect based adapters consist of two main components: the XaQti Corp.
XMAC II Gigabit MAC (
sk) and the SysKonnect GEnesis
controller ASIC (
skc). The XMAC provides the Gigabit MAC and
PHY support while the GEnesis provides an interface to the PCI bus, DMA
support, packet buffering and arbitration. The GEnesis can control up to two
XMACs simultaneously, allowing dual-port NIC configurations.
The Marvell based adapters are a single integrated circuit, but are still
presented as a separate MAC (
sk) and controller ASIC
(
skc). At this time, there are no dual-port Marvell based
NICs.
The
sk driver configures dual port SysKonnect adapters such
that each XMAC is treated as a separate logical network interface. Both ports
can operate independently of each other and can be connected to separate
networks. The SysKonnect driver software currently only uses the second port
on dual port adapters for failover purposes: if the link on the primary port
fails, the SysKonnect driver will automatically switch traffic onto the second
port.
The XaQti XMAC II supports full and half duplex operation with autonegotiation.
The XMAC also supports unlimited frame sizes. Support for jumbo frames is
provided 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. Using
jumbo frames can greatly improve performance for certain tasks, such as file
transfers and data streaming.
Hardware TCP/IP checksum offloading for IPv4 is available but not supported by
the driver.
The following media types and options (as given to
ifconfig(8)) are supported:
-
-
- media
autoselect
- Enable autoselection of the media type and options. The
user can manually override the autoselected mode.
-
-
- media
1000baseSX mediaopt
full-duplex
- Set 1000Mbps (Gigabit Ethernet) operation on fiber and
force full-duplex mode.
-
-
- media
1000baseSX mediaopt
half-duplex
- Set 1000Mbps (Gigabit Ethernet) operation on fiber and
force half-duplex mode.
-
-
- media
1000baseT mediaopt
full-duplex
- Set 1000Mbps (Gigabit Ethernet) operation and force
full-duplex mode.
For more information on configuring this device, see
ifconfig(8). To view a list of
media types and options supported by the card, try
ifconfig
-m <
device>.
For example,
ifconfig -m
sk0.
DIAGNOSTICS
- sk%d: couldn't map memory
- A fatal initialization error has occurred.
- sk%d: couldn't map ports
- A fatal initialization error has occurred.
- sk%d: couldn't map interrupt
- A fatal initialization error has occurred.
- sk%d: failed to enable memory
mapping!
- The driver failed to initialize PCI shared memory mapping.
This might happen if the card is not in a bus-master slot.
- sk%d: no memory for jumbo
buffers!
- The driver failed to allocate memory for jumbo frames
during initialization.
- sk%d: watchdog timeout
- The device has stopped responding to the network, or there
is a problem with the network connection (cable).
SEE ALSO
ifmedia(4),
intro(4),
netintro(4),
pci(4),
ifconfig(8)
XaQti XMAC II datasheet,
http://www.xaqti.com.
SysKonnect GEnesis programming manual,
http://www.syskonnect.com.
HISTORY
The
sk device driver first appeared in
FreeBSD 3.0.
OpenBSD support
was added in
OpenBSD 2.6.
NetBSD support was added in
NetBSD
2.0.
The
msk driver first appeared in
OpenBSD
4.0, and was ported to
NetBSD 4.0.
AUTHORS
The
sk driver was written by
Bill Paul
<
wpaul@ctr.columbia.edu>.
Support for the Marvell Yukon-2 was added by
Mark
Kettenis
<
kettenis@openbsd.org>.
BUGS
This driver is
experimental.
Support for checksum offload is unimplemented.
Performance with at least some Marvell-based adapters is poor, especially on
loaded PCI buses or when the adapters are behind PCI-PCI bridges. It is
believed that this is because the Marvell parts have significantly less
buffering than the original SysKonnect cards had.