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?
-
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