From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261405AbTD2W31 (ORCPT ); Tue, 29 Apr 2003 18:29:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261773AbTD2W30 (ORCPT ); Tue, 29 Apr 2003 18:29:26 -0400 Received: from adsl-68-74-104-142.dsl.klmzmi.ameritech.net ([68.74.104.142]:40712 "EHLO tabriel.tabris.net") by vger.kernel.org with ESMTP id S261405AbTD2W30 (ORCPT ); Tue, 29 Apr 2003 18:29:26 -0400 From: Tabris To: Andre Hedrick Subject: Re: 2.4.21-rc1-ac2 Promise IDE DMA won't work Date: Tue, 29 Apr 2003 18:41:37 -0400 User-Agent: KMail/1.5 Cc: linux-kernel@vger.kernel.org, alan@lxorguk.ukuu.org.uk References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200304291841.38501.tabris@sbcglobal.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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) Haven't tested burning yet. Hope this all helps, and doesn't annoy too much ;) -- tabris - The day advanced as if to light some work of mine; it was morning, and lo! now it is evening, and nothing memorable is accomplished. -- H.D. Thoreau