ichwd0: unable to reserve GCS registers

John Baldwin jhb at freebsd.org
Wed Aug 3 18:02:32 UTC 2011


On Wednesday, August 03, 2011 1:23:29 pm Test Rat wrote:
> John Baldwin <jhb at freebsd.org> writes:
> 
> > On Wednesday, August 03, 2011 4:49:24 am Test Rat wrote:
> >> Doug Barton <dougb at FreeBSD.org> writes:
> >> 
> >> > 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.
> >> 
> >>   $ svn cat 
svn://svn.freebsd.org/base/head/sys/dev/acpica/acpi_pcib_acpi.c | wc -l
> >>   531
> >> 
> >> No difference here on ICH9, ichwd(4) still doesn't attach.
> >
> > Can you add some printfs to see if the new method is being called in
> > acpi_pcib_alloc_resource() and if it is failing when it is called?
> 
> rman_reserve_resource() fails with SYS_RES_MEMORY for isab0 when ichwd0
> tries to attach. And acpi_alloc_sysres() is not called when isab0 or
> isa0 are attached.
> 
>   isab0: found ICH9 or equivalent chipset: Intel ICH9 watchdog timer
>   ichwd0: <Intel ICH9 watchdog timer> on isa0
>   isab0: found ICH9 or equivalent chipset: Intel ICH9 watchdog timer
>   acpi_alloc_resource::acpi_alloc_sysres(child->nameunit=ichwd0, 
type=SYS_RES_IOPORT, *rid=0, start=1072, end=1079, count=8, flags=6) 
res=0xfffffe0007fed380 RF_ACTIVE activated
>   pcib0: allocated type 4 (0x430-0x437) for rid 0 of ichwd0
>   acpi_alloc_resource::acpi_alloc_sysres(child->nameunit=ichwd0, 
type=SYS_RES_IOPORT, *rid=1, start=1120, end=1151, count=32, flags=6) 
res=0xfffffe0007fed400 RF_ACTIVE activated
>   pcib0: allocated type 4 (0x460-0x47f) for rid 1 of ichwd0
>   acpi_pcib_acpi_alloc_resource::acpi_alloc_sysres(child->nameunit=isab0, 
type=SYS_RES_MEMORY, *rid=0, start=4275172368, end=4275172371, count=4, 
flags=6) res=0 failed to reserve
>   ichwd0: unable to reserve GCS registers

Hmm, so it is called, it just fails when it is called.  The range is 
0xfed1f410 - 0xfed1f413.  Can you verify that that is in the 'ACPI memory I/O' 
range in devinfo -u output?

-- 
John Baldwin


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