1.\" $NetBSD: kse.4,v 1.9 2009/10/21 00:30:43 snj Exp $ 2.\" 3.\" Copyright (c) 2006 Tohru Nishimura. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22.\" INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24.\" 25.Dd July 6, 2006 26.Dt KSE 4 27.Os 28.Sh NAME 29.Nm kse 30.Nd Micrel 8842/8841 PCI Ethernet controller driver 31.Sh SYNOPSIS 32.Cd "kse* at pci? dev ? function ?" 33.Sh DESCRIPTION 34The 35.Nm 36driver supports Ethernet interfaces based on the Micrel 8842/8841 37PCI Ethernet chips. 38The 8842 has 2 Ethernet ports which behave as a managed switch to 39bridge each other. 40It works like a T-shape connector of Ethernet data flow in which 41an Ethernet controller sits at the leg of the T. 42Frames can flow between the two ports while traffic destined for 43the 8842 reaches the EMAC. 44The 8841 is a plain 10/100 Ethernet. 45The 46.Nm 47driver distinguishes and handles them according to the HW model. 48.Sh SEE ALSO 49.Xr arp 4 , 50.Xr ifmedia 4 , 51.Xr netintro 4 , 52.Xr pci 4 , 53.Xr ifconfig 8 54.Sh AUTHORS 55The 56.Nm 57driver was written by 58.An Tohru Nishimura . 59.Sh BUGS 60__STRICT_ALIGNMENT case is not written. 618842 media selection keeps 62.Dq auto 63and indicates 64.Dq up 100baseTX-FX flow 65when either of two ports is found link-up. 66There is no functional provision to see and control the media 67selection of them this moment. 68Advanced features like flow volume bound, VLAN tag insertion/removal, 69QoS DiffServ are not implemented and remain uncontrollable by the 70.Nm 71driver. 72UDP4CSUM is not very useful since the HW has an implementation 73error for the case when a large UDP datagram is fragmented into 74MTU sized frames. 75