From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Konstantin A. Lepikhov" Subject: Re: About forcing 32bit DMA patch for AMD690G(SB600) Date: Fri, 25 Jan 2008 23:57:43 +0300 Message-ID: <20080125205743.GA26124@lks.home> References: <47992BA3.3070104@gmail.com> <76366b180801242019h382fd604vd1458dab8b64dd4c@mail.gmail.com> <4799788E.1030600@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mojo.unsafe.ru ([83.222.2.183]:2288 "EHLO mojo.unsafe.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754532AbYAYU5v (ORCPT ); Fri, 25 Jan 2008 15:57:51 -0500 Content-Disposition: inline In-Reply-To: <4799788E.1030600@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: Andrew Paprocki , Shane Huang , sriharivijayaraghavan@yahoo.com.au, linux-ide@vger.kernel.org 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. -- WBR et al.