ichwd0: unable to reserve GCS registers

[Doug Barton]

On 01/27/2012 10:21, John Baldwin wrote:
> On Wednesday, January 04, 2012 2:37:55 am Doug Barton wrote:
>> On 01/03/2012 14:14, John Baldwin wrote:
>>> On Wednesday, August 03, 2011 3:55:17 am Doug Barton wrote:
>>>> On 08/02/2011 15:06, John Baldwin wrote:
>>>>> On Saturday, July 30, 2011 2:49:52 am Andriy Gapon wrote:
>>>>>> on 19/07/2011 18:16 John Baldwin said the following:
>>>>>>> Hmm, can you get devinfo -r output from a working kernel with ichwd loaded?  
>>>>>>> You might be able to just build the kernel with 'nooptions NEW_PCIB'.
>>>>>>
>>>>>> I believe that I've got a similar problem with amdsbwd(4).
>>>>>> It needs some resources (I/O ports) that belong to ACPI.
>>>>>> The problem is that the driver attaches to isa bus which is under
>>>>>> isab->pci->pcib and those particular resources are not assigned to the Host-PCI
>>>>>> bridge.
>>>>>>
>>>>>> I think that you already made a suggestion that perhaps isa bus should  directly
>>>>>> attach to acpi bus when acpi is available.  Not sure if there are any
>>>>>> alternative approaches.
>>>>>
>>>>> Can you try this:
>>>>
>>>> Not so much. :) the first and last patches I can apply to HEAD by hand,
>>>> but /sys/dev/acpica/acpi_pcib_acpi.c is only 387 lines long, so I'm not
>>>> even sure where to start.
>>>>
>>>> Any chance you could diff against HEAD?
>>>
>>> I believe this should be fixed (well, worked-around) by my most recent commit
>>> to sys/dev/acpica/acpi_pcib_acpi.c in HEAD.
>>
>> Funny you should ask. :)  I saw that, and took a look. I'm getting the
>> following error, from a verbose dmesg:
>>
>> isab0: found ICH10 or equivalent chipset: Intel ICH10DO watchdog timer
>> ichwd0: <Intel ICH10DO watchdog timer> on isa0
>> isab0: found ICH10 or equivalent chipset: Intel ICH10DO watchdog timer
>> pcib0: allocated type 4 (0x830-0x837) for rid 0 of ichwd0
>> pcib0: allocated type 4 (0x860-0x87f) for rid 1 of ichwd0
>> ichwd0: ICH WDT present but disabled in BIOS or hardware
>> device_attach: ichwd0 attach returned 6
>>
>> That's different than the error message I got before, but watchdogd
>> still fails. I didn't have a chance to check the BIOS settings until
>> today, and there is no entry for anything even closely resembling this.
>> The only things I actually have disabled are the parallel port, and the
>> "Dell Trusted Platform Module," neither of which I can imagine would be
>> relevant.
>>
>> I'm happy to provide more info.
> 
> Does it operate fully with NEW_PCIB disabled entirely, or do you get this
> same message in that case?

I put nooptions NEW_PCIB in my kernel config, and got basically the same:

isab0: found ICH10 or equivalent chipset: Intel ICH10DO watchdog timer
ichwd0: <Intel ICH10DO watchdog timer> on isa0
isab0: found ICH10 or equivalent chipset: Intel ICH10DO watchdog timer
ichwd0: ICH WDT present but disabled in BIOS or hardware
device_attach: ichwd0 attach returned 6

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