Ubuntu Manpage: sk — SysKonnect SK-984x and SK-982x PCI Gigabit Ethernet adapter driver

Provided by: freebsd-manpages_12.2-1_all

NAME

       sk — SysKonnect SK-984x and SK-982x PCI Gigabit Ethernet adapter driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device miibus
             device sk

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             if_sk_load="YES"

DESCRIPTION

The sk driver provides support for the SysKonnect SK-984x and SK-982x series PCI Gigabit Ethernet
adapters.

The SysKonnect adapters consist of two main components: the XaQti Corp. XMAC II gigabit MAC and the
SysKonnect GEnesis controller ASIC. 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 SK-982x 1000baseT adapters also include a Broadcom BCM5400 1000baseTX PHY which is used in place of
the XMAC's internal PHY. The Broadcom PHY is connected to the XMAC via its GMII port.

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.

Also supported is the Marvell Semiconductor 88E100* gigabit PHY.

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.

The sk driver supports the following media types:

autoselect Enable autoselection of the media type and options. The user can manually override
the autoselected mode by adding media options to the /etc/rc.conf file.

1000baseTX Set 1000baseTX operation over twisted pair. This is only available for SK-982x
series adapters with 1000baseT ports. Both full-duplex and half-duplex modes are
supported.

1000baseSX Set 1000Mbps (Gigabit Ethernet) operation. Both full-duplex and half-duplex modes
are supported.

The sk driver supports the following media options:

full-duplex Force full duplex operation.

half-duplex Force half duplex operation.

For more information on configuring this device, see ifconfig(8).

HARDWARE

       Adapters supported by the sk driver include:

       •   3Com 3C940 single port, 1000baseT adapter
       •   3Com 3C2000-T single port, 1000baseT adapter
       •   Belkin F5D5005 single port, 1000baseT adapter
       •   D-Link DGE-530T single port, 1000baseT adapter
       •   Linksys (revision 2) single port, 1000baseT adapter
       •   SK-9521 SK-NET GE-T single port, 1000baseT adapter
       •   SK-9821 SK-NET GE-T single port, 1000baseT adapter
       •   SK-9822 SK-NET GE-T dual port, 1000baseT 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
       •   SMC 9452TX single port, 1000baseT adapter

LOADER TUNABLES

       Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

       hw.skc.jumbo_disable
               Disable jumbo frame support.  Systems with less memory can set it to a  non-zero  value  to  save
               memory.  The default value is 0.

SYSCTL VARIABLES

       The following variable is available as both sysctl(8) variable and loader(8) tunable:

       dev.skc.%d.int_mod
               This  variable  controls  interrupt  moderation.  The accepted range is 10 to 10000.  The default
               value is 100 microseconds.  The interface has to be brought down and up  again  before  a  change
               takes effect.

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:  no  memory  for  softc  struct!    The  driver  failed  to allocate memory for per-device instance
       information during initialization.

       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).

HISTORY

       The sk device driver first appeared in FreeBSD 3.0.

AUTHORS

       The sk driver was written by Bill Paul <wpaul@ctr.columbia.edu>.

Debian                                           August 29, 2012                                           SK(4)