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Date: Wed, 11 Aug 2004 09:18:48 +0200
From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
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To: Radek Kozlowski <radek@raadradd.com>
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cc: current@freebsd.org
cc: Nate Lawson <nate@root.org>
Subject: Re: Panic on boot with today's CURRENT, ata related
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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