Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S275355AbTHSGDm (ORCPT ); Tue, 19 Aug 2003 02:03:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S275358AbTHSGDl (ORCPT ); Tue, 19 Aug 2003 02:03:41 -0400 Received: from core.kaist.ac.kr ([143.248.147.118]:10391 "EHLO core.kaist.ac.kr") by vger.kernel.org with ESMTP id S275355AbTHSGDk (ORCPT ); Tue, 19 Aug 2003 02:03:40 -0400 Message-ID: <003f01c36617$01c3dc80$a5a5f88f@core8fyzomwjks> From: "Cho, joon-woo" To: Subject: [Q] IDE drive DMA failure Date: Tue, 19 Aug 2003 14:59:09 +0900 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1240 Lines: 53 Hello I send some data from ide disk to some PCI device's RAM directly. At above sentence, 'directly' means that data is not transferred through RAM. Data path is only from ide disk controller to PCI device's RAM. Anyway data can be transferred by PIO. But DMA method can't operate. Below is error message. Aug 18 15:08:12 localhost kernel: hdc: dma_timer_expiry: status=0x58 { DriveReady SeekComplete DataRequest } Aug 18 15:08:12 localhost kernel: hdc: timeout waiting for DMA Aug 18 15:08:12 localhost kernel: ide_dmaproc: chipset supported ide_dma_timeout func only: 14 After this DMA timeout error, data is transferred by PIO. Do you have similar experience? I want to send data by DMA method. What is problem? Kernel? Hardware? And how can I solve this problem? Please give me anser or hint, Thanks! Below is my system spec CPU celeron 400 Motherboard 440BX IDE interface Intel Corporation 82371AB PIIX4 IDE (rev 1). HDD hdc: IC35L040AVVA07-0, ATA DISK drive (Hitachi) - 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/