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.\"	Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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.\" $FreeBSD: src/share/man/man4/man4.i386/sk.4,v 1.3 1999/08/28 00:20:29 peter Exp $
.\"
.Dd $Mdocdate: February 17 2022 $
.Dt SK 4
.Os
.Sh NAME
.Nm sk ,
.Nm skc
.Nd SysKonnect XMAC II and Marvell Yukon 10/100/1Gb Ethernet device
.Sh SYNOPSIS
.Cd "skc* at pci?"
.Cd "sk* at skc?"
.Cd "brgphy* at mii?"
.Cd "eephy* at mii?"
.Cd "xmphy* at mii?"
.Sh DESCRIPTION
The
.Nm
driver provides support for SysKonnect GEnesis and Marvell Yukon
88E8001, 88E8003 and 88E8010 based Gigabit Ethernet adapters,
including the following:
.Pp
.Bl -bullet -offset indent -compact
.It
3Com 3c940 single port, copper adapter
.It
3Com 3c2000-T single port, copper adapter
.It
Allied Telesis AT-2916T, copper adapter
.It
Belkin F5D5005 v1000, copper adapter
.It
D-Link DGE-530T A1, copper adapter
.It
D-Link DGE-530T B1, copper adapter
.It
Fujitsu PP028GE1U, multimode fiber adapter
.It
Fujitsu PP028GE1X, multimode fiber adapter
.It
Fujitsu PW008GE1U, copper adapter
.It
Fujitsu PW008GE1X, copper adapter
.It
Linksys EG1032v2, copper adapter
.It
Linksys EG1064v2, copper adapter
.It
SMC 9452TX, copper adapter
.It
SysKonnect SK-9521 V2.0 single port, copper adapter
.It
SysKonnect SK-9821 single port, copper adapter
.It
SysKonnect SK-9821 V2.0 single port, copper adapter
.It
SysKonnect SK-9822 dual port, copper adapter
.It
SysKonnect SK-9841 single port, single mode fiber adapter
.It
SysKonnect SK-9842 dual port, single mode fiber adapter
.It
SysKonnect SK-9843 single port, multimode fiber adapter
.It
SysKonnect SK-9843 V2.0 single port, copper adapter
.It
SysKonnect SK-9844 dual port, multimode fiber adapter
.El
.Pp
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.
.Pp
The Marvell based adapters are a single integrated circuit, but are
still presented as a separate MAC (sk) and controller ASIC (skc).
.Pp
The GEnesis and Yukon 88E8001, 88E8003 and 88E8010 also support
jumbo frames.
.Pp
The
.Nm
driver supports the following media types:
.Bl -tag -width 1000baseSX
.It Cm autoselect
Enable autoselection of the media type and options.
The user can manually override
the autoselected mode by adding media options to the appropriate
.Xr hostname.if 5
file.
.It Cm 10baseT
Set 10Mbps operation.
The
.Xr ifconfig 8
.Ic mediaopt
option can also be used to select either
.Cm full-duplex
or
.Cm half-duplex
modes.
.It Cm 100baseTX
Set 100Mbps (Fast Ethernet) operation.
The
.Xr ifconfig 8
.Ic mediaopt
option can also be used to select either
.Cm full-duplex
or
.Cm half-duplex
modes.
.It Cm 1000baseT
Set 1000baseT (Gigabit Ethernet) operation over twisted pair.
Both
.Cm full-duplex
and
.Cm half-duplex
modes are supported.
.It Cm 1000baseSX
Set 1000Mbps (Gigabit Ethernet) operation.
Both
.Cm full-duplex
and
.Cm half-duplex
modes are supported.
.El
.Pp
The
.Nm
driver supports the following media options:
.Bl -tag -width full-duplex
.It Cm full-duplex
Force full duplex operation.
.It Cm half-duplex
Force half duplex operation.
.El
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
To view a list of media types and options supported by the card, try
.Ic ifconfig <device> media .
For example,
.Ic ifconfig sk0 media .
.Sh SEE ALSO
.Xr arp 4 ,
.Xr brgphy 4 ,
.Xr eephy 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr xmphy 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Rs
.%T XaQti XMAC II datasheet
.Re
.Rs
.%T SysKonnect GEnesis programming manual
.Re
.Sh HISTORY
The
.Nm
device driver first appeared in
.Fx 3.0 ,
and
.Ox
support was added in
.Ox 2.6 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Bill Paul Aq Mt wpaul@ctr.columbia.edu .