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