Date: Fri, 12 Jan 2001 01:10:03 -0800 (PST) From: Soren Schmidt <sos@freebsd.dk> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/24269: Failure to setup DMA on ATA HDs (Alladin V chipset). Was OK a week ago. Message-ID: <200101120910.f0C9A3990790@freefall.freebsd.org>
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The following reply was made to PR kern/24269; it has been noted by GNATS. From: Soren Schmidt <sos@freebsd.dk> To: timonin@mindspring.com Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/24269: Failure to setup DMA on ATA HDs (Alladin V chipset). Was OK a week ago. Date: Fri, 12 Jan 2001 10:03:31 +0100 (CET) It seems timonin@mindspring.com wrote: > > >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); A fix for this has been committed to -current, it is waiting to be MFC'd -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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