Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270455AbTG1T2o (ORCPT ); Mon, 28 Jul 2003 15:28:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270462AbTG1T2o (ORCPT ); Mon, 28 Jul 2003 15:28:44 -0400 Received: from firewall.mdc-dayton.com ([12.161.103.180]:27102 "EHLO firewall.mdc-dayton.com") by vger.kernel.org with ESMTP id S270455AbTG1T2m (ORCPT ); Mon, 28 Jul 2003 15:28:42 -0400 From: "Kathy Frazier" To: "Mike Dresser" , Subject: RE: DMA not supported with Intel ICH4 I/O controller? Date: Mon, 28 Jul 2003 15:40:09 -0500 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1391 Lines: 42 >>On Mon, 28 Jul 2003, Kathy Frazier wrote: >> I just read on an Intel site >> (http://64.143.3.64/downloads/drivers/845/perform/linux/udma.htmthat) "ICH4 >> requires kernel 2.5.12 or later to enable any DMA mode". Can you guys >> support or refute this? No wonder I'm having problems with my DMA device on On Mon, 28 Jul 2003, Mike Dresser wrote: >I'm running 2.4.21 on this particular machine, and know it worked under >2.4.20. > Bus 0, device 31, function 1: > IDE interface: Intel Corp. 82801DB ICH4 IDE (rev 1). > IRQ 10. > I/O at 0xf000 [0xf00f]. > Non-prefetchable 32 bit memory at 0x20000000 [0x200003ff]. >mike:~# hdparm /dev/hda >/dev/hda: > multcount = 16 (on) > IO_support = 3 (32-bit w/sync) > unmaskirq = 0 (off) > using_dma = 1 (on) I checked the results of the hdparm on my system and it shows that hda has DMA on . . . Hmmm. I have seen a lot of rumblings concerning DMA and IDE devices in the archives of this mailing list. Is it possible that the ide drivers now set up the hardware correctly for the DMA? But somehow the O/S does not support ICH4 for other DMA devices? Kathy - 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/