From owner-freebsd-stable@FreeBSD.ORG Fri Aug 26 06:55:19 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AF41D16A41F for ; Fri, 26 Aug 2005 06:55:19 +0000 (GMT) (envelope-from jmg@hydrogen.funkthat.com) Received: from hydrogen.funkthat.com (gate.funkthat.com [69.17.45.168]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3533F43D45 for ; Fri, 26 Aug 2005 06:55:19 +0000 (GMT) (envelope-from jmg@hydrogen.funkthat.com) Received: from hydrogen.funkthat.com (localhost.funkthat.com [127.0.0.1]) by hydrogen.funkthat.com (8.13.3/8.13.3) with ESMTP id j7Q6tDG7048681; Thu, 25 Aug 2005 23:55:13 -0700 (PDT) (envelope-from jmg@hydrogen.funkthat.com) Received: (from jmg@localhost) by hydrogen.funkthat.com (8.13.3/8.13.3/Submit) id j7Q6tA1W048651; Thu, 25 Aug 2005 23:55:10 -0700 (PDT) (envelope-from jmg) Date: Thu, 25 Aug 2005 23:55:10 -0700 From: John-Mark Gurney To: "Jason C. Wells" Message-ID: <20050826065510.GH30465@funkthat.com> Mail-Followup-To: "Jason C. Wells" , freebsd-stable References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-Operating-System: FreeBSD 5.4-RELEASE-p1 i386 X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31 96 7A 22 B3 D8 56 36 F4 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html Cc: freebsd-stable Subject: Re: Network Over Backplane PCI Bus X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: John-Mark Gurney List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Aug 2005 06:55:19 -0000 Jason C. Wells wrote this message on Thu, Aug 25, 2005 at 16:43 -0700: > Is there a way to run TCP/IP with the PCI bus as a network interface? You'd have to write your own driver to do it... > I am installing FreeBSD on CompactPCI processor boards. It would be really > slick if I could network the boards via the PCI backplane. Isn't there usually a single board acting as master, and all the other boards are children of it? There has to be some sort of arbitrator... You could possibly have a master/slave relationship, where the slaves all present a pci device interface with memory buffer to stick received packets, and then the master provides a way to program the slaves where to stick packets in it's memory buffer for transmitted packets.. I've never worked with CompactPCI, so take the above with a grain of salt.. -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."