kern/134398: problems with udma modes on ata ixp600

>Number:         134398
>Category:       kern
>Synopsis:       problems with udma modes on ata ixp600
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun May 10 00:00:07 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Marat N.Afanasyev
>Release:        FreeBSD 7.2-STABLE amd64
>Organization:
>Environment:
System: FreeBSD zealot.ksu.ru 7.2-STABLE FreeBSD 7.2-STABLE #0: Sat May 9 21:59:19 MSD 2009 [e-mail]:/usr/obj/usr/src/sys/ZEALOT amd64

	% pciconf -vl | grep -A 4 ata
	atapci0@pci0:0:18:0:    class=0x01018f card=0x73881462 chip=0x43801002 rev=0x00 hdr=0x00
	    vendor     = 'ATI Technologies Inc'
	    device     = 'IXP SB600 Serial ATA Controller'
	    class      = mass storage
	    subclass   = ATA
	--
	atapci1@pci0:0:20:1:    class=0x01018a card=0x73881462 chip=0x438c1002 rev=0x00 hdr=0x00
	    vendor     = 'ATI Technologies Inc'
	    device     = 'IXP SB600 ATA Controller'
	    class      = mass storage
	    subclass   = ATA
	
	% atacontrol cap acd0

	Protocol              ATA/ATAPI revision 5
	device model          PIONEER DVD-RW DVR-111D
	serial number         FGDP206241WL
	firmware revision     1.29
	cylinders             0
	heads                 0
	sectors/track         0
	lba supported         
	lba48 not supported       
	dma supported
	overlap not supported

	Feature                      Support  Enable    Value           Vendor
	write cache                    no       no
	read ahead                     no       no
	Tagged Command Queuing (TCQ)   no       no      0/0x00
	SMART                          no       no
	microcode download             no       no
	security                       no       no
	power management               yes      yes
	advanced power management      no       no      0/0x00
	automatic acoustic management  no       no      0/0x00  0/0x00
	

>Description:
	any time I try to copy a large file from dvd, I encounter a problem with 
	'acd0: setting up DMA failed', setting acd0 to pio mode partially solves 
	problem
>How-To-Repeat:
	place a disk into drive and try to read a partially big file
>Fix:

	workaround: atacontrol mode acd0 pio4
	solution: revert ata(4) to 2008-11-25 revision


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