Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758025AbZCWJQo (ORCPT ); Mon, 23 Mar 2009 05:16:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756713AbZCWJQd (ORCPT ); Mon, 23 Mar 2009 05:16:33 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:55641 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753104AbZCWJQc (ORCPT ); Mon, 23 Mar 2009 05:16:32 -0400 Date: Mon, 23 Mar 2009 10:16:19 +0100 From: Robert Schwebel To: Daniel =?iso-8859-15?Q?Kr=FCger?= Cc: david@lang.hm, Alan Cox , Robert Schwebel , Greg KH , linux-kernel@vger.kernel.org, Michael Olbrich , Wolfram Sang , Marc Kleine-Budde , Thomas Gleixner Subject: Re: The Linux Staging tree, what it is and is not. Message-ID: <20090323091619.GN5367@pengutronix.de> References: <20090318183232.GA11594@kroah.com> <20090320005808.GM5367@pengutronix.de> <20090320100146.6599f671@lxorguk.ukuu.org.uk> <20090320103545.GQ5367@pengutronix.de> <20090320105556.4375176d@lxorguk.ukuu.org.uk> <20090320111552.GS5367@pengutronix.de> <49C3B33F.1020905@systec-electronic.com> <20090320153713.65bf8e2d@lxorguk.ukuu.org.uk> <49C7505B.2010205@systec-electronic.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <49C7505B.2010205@systec-electronic.com> X-Sent-From: Pengutronix Entwicklungszentrum Nord - Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Impressum: Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Peiner Strasse 6-8, 31137 Hildesheim, Germany Phone: +49-5121-206917-0 | Fax: +49-5121-206917-5555 Inhaber: Dipl.-Ing. Robert Schwebel X-Message-Flag: See Message Headers for Impressum X-Uptime: 10:06:01 up 33 days, 59 min, 24 users, load average: 0.10, 0.10, 0.06 User-Agent: Mutt/1.5.18 (2008-05-17) X-SA-Exim-Connect-IP: 2001:6f8:1178:2:215:17ff:fe12:23b0 X-SA-Exim-Mail-From: rsc@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1996 Lines: 48 On Mon, Mar 23, 2009 at 10:03:23AM +0100, Daniel Kr?ger wrote: >> what I understand from this thread is that the hardware is a standard >> ethernet card. > > It may be a standard Ethernet controller. But it could also be a > controller with a special hardware acceleration. Industrial Ethernets or CANopen can also be implemented with hardware solutions like a netX or an FPGA, which both would have shared memory to the CPU plus a part of the stack in userspace; however, this is nothing that should be abstracted with this driver infrastructure. It is an issue for a more higher level interface, which is what we will provide with the OSADL Fieldbus Framework: +------------------------------------+ I Application I +------------------------------------+ +------------------------------------+ I Process Data Library I +------------------------------------+ +--------------------+ +-------------+ I $FIELDBUS Stack I I Userspace I I I I Driver I +--------------------+ +-------------+ +--------------------+ +-------------+ I AF_CAN / AF_PACKET I I UIO I I Socket I I I +--------------------+ +-------------+ Userspace ___^___ +--------------------+ +-------------+ v I eth/can Card I I UIO driver I Kernel I with normal driver I I I +--------------------+ +-------------+ rsc -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/