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SK(4) Device Drivers Manual SK(4)

sk, skcSysKonnect XMAC II and Marvell Yukon 10/100/Gigabit Ethernet device

skc* at pci?
sk* at skc?
brgphy* at mii?
eephy* at mii?
xmphy* at mii?

The sk driver provides support for SysKonnect GEnesis and Marvell Yukon 88E8001, 88E8003 and 88E8010 based Gigabit Ethernet adapters, including the following:

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).

The GEnesis and Yukon 88E8001, 88E8003 and 88E8010 also support a frame size of up to 9000 bytes. 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 transmit Jumbo frames. Using Jumbo frames can greatly improve performance for certain tasks, such as file transfers and data streaming.

Hardware receive IP checksum offload for IPv4 is supported.

The sk driver supports the following media types:

Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to the appropriate hostname.if(5) file.
Set 10Mbps operation. The ifconfig(8) mediaopt option can also be used to select either full-duplex or half-duplex modes.
Set 100Mbps (Fast Ethernet) operation. The ifconfig(8) mediaopt option can also be used to select either full-duplex or half-duplex modes.
Set 1000baseT (Gigabit Ethernet) operation over twisted pair. Both full-duplex and half-duplex modes are supported.
Set 1000Mbps (Gigabit Ethernet) operation. Both full-duplex and half-duplex modes are supported.

The sk driver supports the following media options:

Force full duplex operation.
Force half duplex operation.

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 <device> media. For example, ifconfig sk0 media.

arp(4), brgphy(4), eephy(4), ifmedia(4), intro(4), netintro(4), pci(4), xmphy(4), hostname.if(5), ifconfig(8)

XaQti XMAC II datasheet.

SysKonnect GEnesis programming manual, http://www.syskonnect.com.

The sk device driver first appeared in FreeBSD 3.0, and OpenBSD support was added in OpenBSD 2.6.

The sk driver was written by Bill Paul ⟨wpaul@ctr.columbia.edu⟩.

March 30, 2009 OpenBSD-5.1