2006-07-06 10:20:52 +04:00
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.\" $NetBSD: kse.4,v 1.4 2006/07/06 06:20:52 wiz Exp $
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2006-06-30 21:27:11 +04:00
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Tohru Nishimura.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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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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2006-07-06 10:20:52 +04:00
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.Dd July 6, 2006
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2006-06-30 21:27:11 +04:00
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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
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8842/8841 PCI Ethernet chips.
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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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2006-07-01 01:25:59 +04:00
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.Sh BUGS
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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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the Ethernet controller sits at the leg of the T.
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2006-07-06 10:20:52 +04:00
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Frames can flow between the two ports while traffic destined
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2006-07-06 07:00:25 +04:00
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for the 8842 reaches the EMAC.
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2006-07-01 01:25:59 +04:00
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The
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.Nm
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driver is not aware of the second port's existence and treats the
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8842 as if it was a single port 8841.
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The second port PHY is always auto select.
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The PDF documentation is unclear and inconsistent about whether
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the Rx DMA alignment restriction is removed or not.
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The __STRICT_ALIGNMENT case is not written.
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Advanced features like flow volume bound, VLAN tag insertion/removal,
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and detailed MIB counters are not implemented and remain uncontrollable
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by the
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.Nm
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driver.
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2006-07-06 07:00:25 +04:00
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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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