SK(4) Kernel Interfaces Manual SK(4) NAME sk -- SysKonnect SK-984x and SK-982x PCI gigabit ethernet adapter driver SYNOPSIS device miibus device sk DESCRIPTION The sk driver provides support for the SysKonnect SK-984x and SK-982x se- ries PCI gigabit ethernet adapters, including the following: * 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 * 3COM 3C940 single port, 1000baseT adapter 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 suspport while the GEnesis provides an in- terface 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 indepenently 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 88E1000* gigabit PHY. The XaQti XMAC II supports full and half duplex operation with autonegotia- tion. 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 re- ceive 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. The sk driver also supports one special link option for 1000baseTX cards: link0 With 1000baseTX 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 automati- cally. 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). 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-mas- ter 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 arp(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>. FreeBSD 4.11 July 3, 1999 SK(4)
NAME | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS
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