From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262050AbTD3AO2 (ORCPT ); Tue, 29 Apr 2003 20:14:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262054AbTD3AO1 (ORCPT ); Tue, 29 Apr 2003 20:14:27 -0400 Received: from main.gmane.org ([80.91.224.249]:63111 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S262050AbTD3AOZ (ORCPT ); Tue, 29 Apr 2003 20:14:25 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Nicholas Wourms Subject: Re: 2.4.21-rc1-ac2 Promise IDE DMA won't work Date: Tue, 29 Apr 2003 20:21:39 -0400 Message-ID: <3EAF1713.7000009@myrealbox.com> References: <200304291841.38501.tabris@sbcglobal.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@main.gmane.org Cc: alan@lxorguk.ukuu.org.uk User-Agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02 X-Accept-Language: en-us, en X-Enigmail-Version: 0.74.2.0 X-Enigmail-Supports: pgp-inline, pgp-mime Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Tabris wrote: > On Tuesday 29 April 2003 04:15 pm, Andre Hedrick wrote: > >>The Promise chipset use a second DMA engine at offset 0x24 respective >>of the channel. Mixing an ATA and ATAPI on that channel is almost >>impossible to make the corner cases work. Next, if there us a 48-bit >>ATA plus ATAPI on the channel popping between the two enignes does >>not look sane at all because one has to swithc the location of the >>hwif->sgtable. > > > Ok... moved the HDDs from the VIA secondary to the PDC primary (tried > moving both, but it seems that ide=reverse doesn't work), and the > CD-R/W to the VIA secondary. > > good news, regular reads seem to use the DMA engine. bad news, CDDA > ripping (using cdparanoia) does not. > > is this a known issue? (i thought that CDDA ripping had been fixed) > Have you tried Andrew Morton's ide-cd dma patch? It seems to have worked well for me, at least. A summary of what it does is included at the top of the patch. http://www.zipworld.com.au/~akpm/linux/patches/2.4/2.4.20/ide-akpm.patch Perhaps Alan might considier it for the -rc2 ac patch? Cheers, Nicholas