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+.\"	$NetBSD: kse.4,v 1.9 2009/10/21 00:30:43 snj Exp $
+.\"
+.\" Copyright (c) 2006 Tohru Nishimura.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd July 6, 2006
+.Dt KSE 4
+.Os
+.Sh NAME
+.Nm kse
+.Nd Micrel 8842/8841 PCI Ethernet controller driver
+.Sh SYNOPSIS
+.Cd "kse* at pci? dev ? function ?"
+.Sh DESCRIPTION
+The
+.Nm
+driver supports Ethernet interfaces based on the Micrel 8842/8841
+PCI Ethernet chips.
+The 8842 has 2 Ethernet ports which behave as a managed switch to
+bridge each other.
+It works like a T-shape connector of Ethernet data flow in which
+an Ethernet controller sits at the leg of the T.
+Frames can flow between the two ports while traffic destined for
+the 8842 reaches the EMAC.
+The 8841 is a plain 10/100 Ethernet.
+The
+.Nm
+driver distinguishes and handles them according to the HW model.
+.Sh SEE ALSO
+.Xr arp 4 ,
+.Xr ifmedia 4 ,
+.Xr netintro 4 ,
+.Xr pci 4 ,
+.Xr ifconfig 8
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An Tohru Nishimura .
+.Sh BUGS
+__STRICT_ALIGNMENT case is not written.
+8842 media selection keeps
+.Dq auto
+and indicates
+.Dq up 100baseTX-FX flow
+when either of two ports is found link-up.
+There is no functional provision to see and control the media
+selection of them this moment.
+Advanced features like flow volume bound, VLAN tag insertion/removal,
+QoS DiffServ are not implemented and remain uncontrollable by the
+.Nm
+driver.
+UDP4CSUM is not very useful since the HW has an implementation
+error for the case when a large UDP datagram is fragmented into
+MTU sized frames.