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Date:      Wed, 11 Aug 2004 09:18:48 +0200
From:      =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
To:        Radek Kozlowski <radek@raadradd.com>
Cc:        Nate Lawson <nate@root.org>
Subject:   Re: Panic on boot with today's CURRENT, ata related
Message-ID:  <4119C858.6070000@DeepCore.dk>
In-Reply-To: <20040810215907.GD28585@werd>
References:  <4113EB2A.7060401@root.org> <20040806221109.GC55186@werd><411406AA.3030607@root.org> <20040810203822.GB28585@werd><41193370.3020302@root.org> <20040810210112.GC28585@werd><411939FC.5060001@root.org> <20040810215907.GD28585@werd>

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Radek Kozlowski wrote:

> -atapci0: Reserved 0x10 bytes for rid 0x20 type 4 at 0x8080
> [...]
> -ata0-master: setting UDMA100 on AcerLabs Aladdin chip
> [...]
> -ATAPI_RESET time =3D 160us
> +ATAPI_RESET time =3D 180us
> [...]
> -ad0: 16 secs/int, 1 depth queue, UDMA100
> +ad0: 16 secs/int, 1 depth queue, PIO4
>=20
> Please tell me if there's more I can do. Thank you.

Hmm, you are not getting the DMA resource, or the PCI config registers=20
are not responding as they should.

To get more info you should instrument the code in ata-pci.c around=20
lines 178-190 to see what it is that rejects the DMA resource.

Something changes in the resources/PCI config that is sent to the ATA=20
driver so that it either cant get at the I/O ports for DMA or so that=20
the PCI config regs wont allow busmastering to be enabled..
Wether this is in ACPI or the PCI code I cant tell without more info=20
from doing the above instrumenting..

-S=F8ren



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