From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: About forcing 32bit DMA patch for AMD690G(SB600) Date: Fri, 25 Jan 2008 18:13:51 -0500 Message-ID: <479A6D2F.1050008@garzik.org> References: <47992BA3.3070104@gmail.com> <76366b180801242019h382fd604vd1458dab8b64dd4c@mail.gmail.com> <4799788E.1030600@gmail.com> <20080125205743.GA26124@lks.home> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:35240 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761844AbYAYXOC (ORCPT ); Fri, 25 Jan 2008 18:14:02 -0500 In-Reply-To: <20080125205743.GA26124@lks.home> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo , Andrew Paprocki , Shane Huang , sriharivijayaraghavan@yahoo.com.au, linux-ide@vger.kernel.org Konstantin A. Lepikhov wrote: > Hi Tejun! > > Friday 25, at 02:50:06 PM you wrote: > >> Andrew Paprocki wrote: >>> I have an SB600/RS690 here with SATA drives connected. I haven't been >>> following this thread, but I can help test something if it would help. >> We're trying to determine whether SB600 ahci controller can do 64bit DMA >> or not. Srihari's couldn't but Shane's test result tells a different >> story. Do you have memory mapped over 4G (if you have 4G some of them >> will be over 4G, you can know this by looking at the e820 map printed >> during boot)? > $ lspci -nn > 00:00.0 Host bridge [0600]: ATI Technologies Inc RD580 [CrossFire Xpress 3200] Chipset Host Bridge [1002:5952] > 00:02.0 PCI bridge [0604]: ATI Technologies Inc RS480 PCI-X Root Port [1002:5a34] > 00:05.0 PCI bridge [0604]: ATI Technologies Inc RS480 PCI Bridge [1002:5a37] > 00:12.0 SATA controller [0106]: ATI Technologies Inc SB600 Non-Raid-5 SATA [1002:4380] > ... > > Is this hardware enough for testing? I can add 2G to existing 4G of RAM > and post dmesg. "greater than 4G" would be a highly useful configuration... Jeff