Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754187Ab3C2Kob (ORCPT ); Fri, 29 Mar 2013 06:44:31 -0400 Received: from einhorn.in-berlin.de ([192.109.42.8]:36774 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751105Ab3C2Koa (ORCPT ); Fri, 29 Mar 2013 06:44:30 -0400 X-Envelope-From: stefanr@s5r6.in-berlin.de Date: Fri, 29 Mar 2013 11:44:09 +0100 From: Stefan Richter To: Stefan Richter Cc: Peter Hurley , linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Clemens Ladisch Subject: Re: [PATCH] firewire: Enable physical DMA above 4GB Message-ID: <20130329114409.3634676e@stein> In-Reply-To: <20130326213532.38a7bd4c@stein> References: <1364307734-27709-1-git-send-email-peter@hurleysoftware.com> <20130326195653.470b09d6@stein> <1364324929.3866.13.camel@thor.lan> <20130326213532.38a7bd4c@stein> X-Mailer: Claws Mail 3.9.0 (GTK+ 2.24.12; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1221 Lines: 31 On Mar 26 Stefan Richter wrote: > On Mar 26 Peter Hurley wrote: > > On Tue, 2013-03-26 at 19:56 +0100, Stefan Richter wrote: > > > It has been a long time though since I last checked whether PhyUpperBound > > > is implemented; maybe it has become more widespread than it was back then. > > > > > > Or maybe it hasn't: All OHCI-1394 chips that ever came to market are 32 > > > bit chips anyway. So the few rare ones that do support PhyUpperBound > > > larger than 4 GB cannot in fact use it. > > > > > > Or am I severely behind the times about this? > > > > The FW643e-2 is natively PCIe (not behind a bridge) and supports phys > > DMA past 4GB (the datasheet says all 48 bits but I can only test it out > > to 10GB). > > > > I thought the FW643e was as well? You'll have to test that out :) > > OK, will do. Does lspci or something similar show which PCI devices are capable of 64 bit wide addressing? -- Stefan Richter -=====-===-= --== ===-= http://arcgraph.de/sr/ -- 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/