From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262752AbVA1UO4 (ORCPT ); Fri, 28 Jan 2005 15:14:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262741AbVA1UMr (ORCPT ); Fri, 28 Jan 2005 15:12:47 -0500 Received: from colo.lackof.org ([198.49.126.79]:40662 "EHLO colo.lackof.org") by vger.kernel.org with ESMTP id S262728AbVA1ULt (ORCPT ); Fri, 28 Jan 2005 15:11:49 -0500 Date: Fri, 28 Jan 2005 13:12:00 -0700 From: Grant Grundler To: Jesse Barnes Cc: Grant Grundler , Jon Smirl , Greg KH , Russell King , Jeff Garzik , Matthew Wilcox , linux-pci@atrey.karlin.mff.cuni.cz, lkml Subject: Re: Fwd: Patch to control VGA bus routing and active VGA device. Message-ID: <20050128201200.GE32135@colo.lackof.org> References: <9e47339105011719436a9e5038@mail.gmail.com> <200501281041.42016.jbarnes@sgi.com> <20050128193320.GB32135@colo.lackof.org> <200501281141.16450.jbarnes@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200501281141.16450.jbarnes@sgi.com> X-Home-Page: http://www.parisc-linux.org/ User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 28, 2005 at 11:41:16AM -0800, Jesse Barnes wrote: > Yeah, I think I understand. We could probably do the same thing on sn2 > as you do on parisc--add a 'segment 0' offset to the port so that it's routed > correctly. I think that's a little less flexible than adding a new resource > though, since it makes it harder for drivers to support more than one device > or devices on non-segment 0 busses. To be clear, the parisc code defines this in include/asm-parisc/pci.h: #define HBA_PORT_SPACE_BITS 16 #define PCI_PORT_HBA(a) ((a) >> HBA_PORT_SPACE_BITS) and PCI_PORT_HBA gets used in arch/parisc/kernel/pci.c. Offhand, I don't know if ia64 has the equivalent. But it sounds like it might need it. grant