DragonFly On-Line Manual Pages

SK(4)                 DragonFly Kernel Interfaces Manual                 SK(4)

NAME
     sk - SysKonnect XMAC II and Marvell Yukon based Gigabit Ethernet device

SYNOPSIS
     device miibus
     device sk

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

           if_sk_load="YES"

DESCRIPTION
     The sk driver provides support for SysKonnect based Gigabit Ethernet
     adapters and Marvell based Gigabit Ethernet adapters.

     The SysKonnect based 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 Marvell based adapters are a single integrated circuit, but are still
     presented as a separate MAC and controller ASIC.

     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.

     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.

     1000baseT             Set 1000baseT 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.

     The sk driver also supports one special link option for 1000baseT cards:

     link0                 With 1000baseT cards, establishing a link between
                           two ports requires that one port be configured as a
                           master and the other a slave.  With
                           autonegotiation, the master/slave settings will be
                           chosen automatically.  However when manually
                           selecting the link state, it is necessary to force
                           one side of the link to be a master and the other a
                           slave.  The sk driver configures the ports as
                           slaves by default.  Setting the link0 flag with
                           ifconfig(8) will set a port as a master instead.

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

HARDWARE
     The sk driver supports SysKonnect based Gigabit Ethernet adapters and
     Marvell based Gigabit Ethernet adapters, including the following:

     *   3Com 3c940 single port, copper adapter
     *   3Com 3c2000-T single port, copper adapter
     *   Belkin F5D5005, copper adapter
     *   D-Link DGE-530T, copper adapter
     *   Linksys EG1032v2, copper adapter
     *   Linksys EG1064v2, copper adapter
     *   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
     *   SMC 9452TX, copper adapter

DIAGNOSTICS
     skc%d: couldn't map memory  A fatal initialization error has occurred.

     skc%d: couldn't map interrupt  A fatal initialization error has occurred.

     sk%d: jumbo buffer allocation failed  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
     arp(4), ifmedia(4), miibus(4), netintro(4), ng_ether(4), vlan(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.

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

DragonFly 5.9-DEVELOPMENT      November 2, 2006      DragonFly 5.9-DEVELOPMENT