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attempt to standardise the way we specify speeds in our name description (Nd)
lines;

sthen and deraadt argued for unit suffixes for speeds 1Gb+
deraadt also requested Gigabit be standardised to 1Gb

ok sthen deraadt ian benno

.\"	$OpenBSD: msk.4,v 1.18 2021/09/08 20:29:21 jmc Exp $
.\"
.\" Copyright (c) 1997, 1998, 1999
.\"	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: September 8 2021 $
.Dt MSK 4
.Os
.Sh NAME
.Nm msk ,
.Nm mskc
.Nd Marvell Yukon-2 10/100/1Gb Ethernet device
.Sh SYNOPSIS
.Cd "mskc* at pci?"
.Cd "msk* at mskc?"
.Cd "eephy* at mii?"
.Sh DESCRIPTION
The
.Nm
driver provides support for Marvell Yukon-2 88E802x, 88E805x, 88E806x,
and 88E807x based Gigabit Ethernet adapters and 88E803x/88E804x based
Fast Ethernet adapters, including the following:
.Pp
.Bl -bullet -offset indent -compact
.It
D-Link DGE-550SX, multimode fiber adapter
.It
D-Link DGE-560SX, multimode fiber adapter
.It
D-Link DGE-550T B1, copper adapter
.It
D-Link DGE-560T, copper adapter
.It
SysKonnect SK-9E21 single port, copper adapter
.It
SysKonnect SK-9E22 dual port, copper adapter
.It
SysKonnect SK-9E81 single port, multimode fiber adapter
.It
SysKonnect SK-9E82 dual port, multimode fiber adapter
.It
SysKonnect SK-9E91 single port, single mode fiber adapter
.It
SysKonnect SK-9E92 dual port, single mode fiber adapter
.It
SysKonnect SK-9S21 single port, copper adapter
.It
SysKonnect SK-9S22 dual port, copper adapter
.It
SysKonnect SK-9S81 single port, multimode fiber adapter
.It
SysKonnect SK-9S82 dual port, multimode fiber adapter
.It
SysKonnect SK-9S91 single port, single mode fiber adapter
.It
SysKonnect SK-9S92 dual port, single mode fiber adapter
.It
SysKonnect SK-9E21D single port, copper adapter
.El
.Pp
The Yukon-2 88E802x, 88E805x, 88E806x, and 88E807x 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 msk0 media .
.Sh SEE ALSO
.Xr arp 4 ,
.Xr eephy 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 4.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Mark Kettenis Aq Mt kettenis@openbsd.org .
.Sh BUGS
The
.Nm
driver does not support hardware receive IP checksum offload yet.