Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 1 Mar 2001 18:59:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 1 Mar 2001 18:59:43 -0500 Received: from adsl-63-195-162-81.dsl.snfc21.pacbell.net ([63.195.162.81]:6929 "EHLO master.linux-ide.org") by vger.kernel.org with ESMTP id ; Thu, 1 Mar 2001 18:59:31 -0500 Date: Thu, 1 Mar 2001 15:58:58 -0800 (PST) From: Andre Hedrick To: Hylke van der Schaaf cc: linux-kernel@vger.kernel.org Subject: Re: DMA on a AMD7409 controller with kernel 2.4.2 In-Reply-To: <20010301140158.A402@hylke.fakenet> Message-ID: 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 On Thu, 1 Mar 2001, Hylke van der Schaaf wrote: > With kernet 2.2.18 DMA mode for my harddisks worked just fine, > getting IDE DMA working on an AMD7409 controller with kernel 2.4.2 is a problem. > > questions: > Why is DMA disabled on revision < C4? > How can I gat DMA working again? AMD7409: disabling single-word DMA support (revision < C4) This is not Ultra DMA it is the class of orignal from ATA-1/2 > > The Information: > > in 2.2.18 I get: > --------- dmesg: ---------- > PCI_IDE: unknown IDE controller on PCI bus 00 device 39, VID=1022, DID=7409 > PCI_IDE: not 100% native mode: will probe irqs later > ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:pio > PCI_IDE: simplex device: DMA disabled > ide1: PCI_IDE Bus-Master DMA disabled (BIOS) > hda: IBM-DPTA-372050, ATA DISK drive > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 > hda: IBM-DPTA-372050, 19574MB w/1961kB Cache, CHS=2495/255/63 > --------------------------- > > hylke:/home/hylke# hdparm -v /dev/hda > > /dev/hda: > multcount = 16 (on) > I/O support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 1 (on) > keepsettings = 0 (off) > nowerr = 0 (off) > readonly = 0 (off) > readahead = 8 (on) > geometry = 2495/255/63, sectors = 40088160, start = 0 > hylke:/home/hylke# hdparm -tT /dev/hda > > /dev/hda: > Timing buffer-cache reads: 128 MB in 0.89 seconds =143.82 MB/sec > Timing buffered disk reads: 64 MB in 2.85 seconds = 22.46 MB/sec > ---------------------------- > > All was fine. > I compiled 2.4.2, with: > > CONFIG_BLK_DEV_IDEPCI=y > CONFIG_IDEPCI_SHARE_IRQ=y > CONFIG_BLK_DEV_IDEDMA_PCI=y > CONFIG_IDEDMA_PCI_AUTO=y > CONFIG_BLK_DEV_IDEDMA=y > CONFIG_IDEDMA_PCI_WIP=y > CONFIG_AMD7409_OVERRIDE=y > CONFIG_IDEDMA_AUTO=y > CONFIG_IDEDMA_IVB=y > > and I get: > > --------- dmesg: ---------- > Uniform Multi-Platform E-IDE driver Revision: 6.31 > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx > AMD7409: IDE controller on PCI bus 00 dev 39 > AMD7409: chipset revision 3 > AMD7409: not 100% native mode: will probe irqs later > AMD7409: disabling single-word DMA support (revision < C4) > AMD7409: simplex device: DMA forced > ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA > hda: IBM-DPTA-372050, ATA DISK drive > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 > hda: 40088160 sectors (20525 MB) w/1961KiB Cache, CHS=2495/255/63 > -------------------------- > hylke:/home/hylke# hdparm -v /dev/hda > > /dev/hda: > multcount = 16 (on) > I/O support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 0 (off) > keepsettings = 0 (off) > nowerr = 0 (off) > readonly = 0 (off) > readahead = 8 (on) > geometry = 2495/255/63, sectors = 40088160, start = 0 > hylke:/home/hylke# hdparm -d1 /dev/hda > > /dev/hda: > setting using_dma to 1 (on) > HDIO_SET_DMA failed: Operation not permitted > using_dma = 0 (off) > hylke:/home/hylke# hdparm -tT /dev/hda > > /dev/hda: > Timing buffer-cache reads: 128 MB in 0.90 seconds =142.22 MB/sec > Timing buffered disk reads: 64 MB in 12.59 seconds = 5.08 MB/sec > ------------------------- > > My harddisk speed is down to 25%... > > Greets, > Hylke van der Schaaf > > > -- > Hi, I'm a signature virus. plz set me as your signature and help me > spread :) > - > 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/ > Andre Hedrick Linux ATA Development ASL Kernel Development ----------------------------------------------------------------------------- ASL, Inc. Toll free: 1-877-ASL-3535 1757 Houret Court Fax: 1-408-941-2071 Milpitas, CA 95035 Web: www.aslab.com - 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/