Re: Invalid PnP ACPI reserved MMIO areas on Supermicro boards

[Robert Hancock <hancockr@shaw.ca>]

Len Brown wrote:
> On Tuesday 09 October 2007 20:01, Robert Hancock wrote:
>> Some people with certain Supermicro boards (at least the H8DCE, it 
>> seems) have reported that the sata_nv driver fails to attach to some of 
>> the controllers due to resource conflicts:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=280641
>> https://bugzilla.redhat.com/show_bug.cgi?id=313491
>>
>> Essentially since about 2.6.22 or so (before which we apparently didn't 
>> handle PnpACPI reserved MMIO regions?) we get:
> 
> So if you boot with "pnpacpi=off" then the board is happy?
> 
> -Len

Apparently yes - see new comments in:

https://bugzilla.redhat.com/show_bug.cgi?id=280641

A patch has also been proposed to ignore motherboard resources that 
overlap PCI BARs here:

https://bugzilla.redhat.com/show_bug.cgi?id=313491

> 
>> pnp: 00:09: iomem range 0xdfefd000-0xdfefd3ff has been reserved
>> pnp: 00:09: iomem range 0xdfefe000-0xdfefe3ff has been reserved
>>
>> when the CK804 SATA controllers have as their BIOS-assigned resources:
>>
>> 80:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller 
>> (rev f3) (prog-if 85 [Master SecO PriO])
>> 	Subsystem: Super Micro Computer Inc Unknown device 1011
>> 	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
>> Stepping- SERR- FastB2B-
>> 	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
>> <MAbort- >SERR- <PERR-
>> 	Interrupt: pin A routed to IRQ 46
>> 	Region 0: I/O ports at e400 [size=8]
>> 	Region 1: I/O ports at e000 [size=4]
>> 	Region 2: I/O ports at dc00 [size=8]
>> 	Region 3: I/O ports at d800 [size=4]
>> 	Region 4: I/O ports at d400 [size=16]
>> 	Region 5: Memory at dfefd000 (32-bit, non-prefetchable)
>>
>> and
>>
>> 80:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller 
>> (rev f3) (prog-if 85 [Master SecO PriO])
>> 	Subsystem: Super Micro Computer Inc Unknown device 1011
>> 	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
>> Stepping- SERR- FastB2B-
>> 	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
>> <MAbort- >SERR- <PERR-
>> 	Interrupt: pin A routed to IRQ 45
>> 	Region 0: I/O ports at f800 [size=8]
>> 	Region 1: I/O ports at f400 [size=4]
>> 	Region 2: I/O ports at f000 [size=8]
>> 	Region 3: I/O ports at ec00 [size=4]
>> 	Region 4: I/O ports at e800 [size=16]
>> 	Region 5: Memory at dfefe000 (32-bit, non-prefetchable) [size=4K]
>>
>> And so of course we get:
>>
>> sata_nv 0000:80:07.0: Using ADMA mode
>> PCI: Unable to reserve mem region #6:1000@dfefd000 for device 0000:80:07.0
>> ACPI: PCI interrupt for device 0000:80:07.0 disabled
>> sata_nv: probe of 0000:80:07.0 failed with error -16
>> ACPI: PCI Interrupt Link [LT2E] enabled at IRQ 45
>> ACPI: PCI Interrupt 0000:80:08.0[A] -> Link [LT2E] -> GSI 45 (level, 
>> low) -> IRQ 45
>> sata_nv 0000:80:08.0: Using ADMA mode
>> PCI: Unable to reserve mem region #6:1000@dfefe000 for device 0000:80:08.0
>> ACPI: PCI interrupt for device 0000:80:08.0 disabled
>> sata_nv: probe of 0000:80:08.0 failed with error -16
>>
>> So essentially the BIOS has erroneously reserved the SATA controller's 
>> BARs in the ACPI motherboard resources, preventing the driver from 
>> attaching to the device.
>>
>> Any ideas on what we can do about this?
>>
>> -Get Supermicro to fix the BIOS - already tried, it seems
>> -System-specific quirk to ignore these resource reservations?
>> -Try to move the PCI resources if they conflict with the ACPI resource 
>> reservations?
>>
>> I wonder how Windows deals with this, if it even does on these boards?
>>
>