Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270441AbTG1Sac (ORCPT ); Mon, 28 Jul 2003 14:30:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270444AbTG1Sac (ORCPT ); Mon, 28 Jul 2003 14:30:32 -0400 Received: from windsormachine.com ([206.48.122.28]:61704 "EHLO router.windsormachine.com") by vger.kernel.org with ESMTP id S270441AbTG1Sab (ORCPT ); Mon, 28 Jul 2003 14:30:31 -0400 Date: Mon, 28 Jul 2003 14:45:44 -0400 (EDT) From: Mike Dresser To: linux-kernel@vger.kernel.org Subject: Re: DMA not supported with Intel ICH4 I/O controller? In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1574 Lines: 43 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 > the ASUS P4PE (using Intel 845PE and ICH4 chipsets)! Are there any patches, > by chance, against a 2.4.20-8 that will give our system DMA support? Or > maybe a patch for 2.4.21? kernel.org shows that the latest (albeit beta) > kernel is 2.6.0-test2 . . . I hestiate to use that, because we would like > something more stable to ship with our product. 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) mike:~# hdparm -Tt /dev/hda /dev/hda: Timing buffer-cache reads: 128 MB in 0.37 seconds =345.95 MB/sec Timing buffered disk reads: 64 MB in 1.88 seconds = 34.04 MB/sec ASUS P4B533 here, and other similar machines work as well. Mike - 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/