From owner-freebsd-bugs  Fri Jan 12  1: 0:19 2001
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP id 9A33137B402
	for <freebsd-bugs@hub.freebsd.org>; Fri, 12 Jan 2001 01:00:01 -0800 (PST)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.11.1/8.11.1) id f0C901g87500;
	Fri, 12 Jan 2001 01:00:01 -0800 (PST)
	(envelope-from gnats)
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP id AFB3C37B402
	for <freebsd-gnats-submit@FreeBSD.org>; Fri, 12 Jan 2001 00:55:43 -0800 (PST)
Received: (from nobody@localhost)
	by freefall.freebsd.org (8.11.1/8.11.1) id f0C8thX86985;
	Fri, 12 Jan 2001 00:55:43 -0800 (PST)
	(envelope-from nobody)
Message-Id: <200101120855.f0C8thX86985@freefall.freebsd.org>
Date: Fri, 12 Jan 2001 00:55:43 -0800 (PST)
From: timonin@mindspring.com
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-1.0
Subject: kern/24269: Failure to setup DMA on ATA HDs (Alladin V chipset). Was OK a week ago.
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org


>Number:         24269
>Category:       kern
>Synopsis:       Failure to setup DMA on ATA HDs (Alladin V chipset). Was OK a week ago.
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jan 12 01:00:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Vladimir Timonin
>Release:        4.2
>Organization:
>Environment:
FreeBSD My.PC 4.2-STABLE FreeBSD 4.2-STABLE #13: Thu Jan 11 22:47:23 PST 2001 root@My.PC:/usr/src/sys/compile/NEWGEN i386
>Description:
After last upgrade (Jan 10) I lost DMA mode i/O on my hard disk drives.
Alladin V chipset
 ata channel 0 - master hd (UDMA2), slave CDROM (PIO4)
     channel 1 - master hd (UDMA2), slave CDRW (PIO4)
Looks like that init of the slave (pio) device cause switching off dma for hd drive.
Mount failure appears and after several retries HD I/O fallbacks
to PIO4.

>How-To-Repeat:
I think, that will be enough to configure one ata channel on Alladin V
board with UDMA master and PIO slave devices.
>Fix:
After I comment one statement in ata-dma.c
(line 316,317) things return back to previous (udma2/pio4, udma2/pio4)
happy times.
I comment (it is not a FIX)
 pci_write_config(parent, 0x54,
          pci_read_config(parent, 0x54, 4) & ~0x88880000, 4);


>Release-Note:
>Audit-Trail:
>Unformatted:


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message