An issue about sp5100 watchdog

An issue about sp5100 watchdog

[Huang Rui]

Hi all,

I found an issue in some of AMD platforms about sp5100, that the MMIO
address (0x51413120) is already used by System RAM
(00100000-7c2befff)...

[   29.928096] sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver v0.05
[   29.928302] sp5100_tco: PCI Vendor ID: 0x1022, Device ID: 0x790b, Revision ID: 0x4a
[   29.928319] sp5100_tco: Got 0x51413120 from indirect I/O
[   29.928323] sp5100_tco: MMIO address 0x51413120 already in use
[   29.928332] sp5100_tco: SBResource_MMIO is disabled(0xe000a0)
[   29.928333] sp5100_tco: failed to find MMIO address, giving up.

00100000-7c2befff : System RAM
  01000000-017b1ab3 : Kernel code
  017b1ab4-01d4ce7f : Kernel data
  01ec4000-02008fff : Kernel bss
7c2bf000-7c8befff : reserved
7c8bf000-7cbbefff : ACPI Non-volatile Storage
  7cbb6000-7cbb9fff : MSFT0101:00
  7cbba000-7cbbdfff : MSFT0101:00
7cbbf000-7cbfefff : ACPI Tables
7cbff000-7cbfffff : System RAM
7cc00000-7effffff : reserved

Any idea?

Thanks,
Rui

Re: An issue about sp5100 watchdog

[Guenter Roeck]

On 12/07/2015 09:42 PM, Huang Rui wrote:
> Hi all,
>
> I found an issue in some of AMD platforms about sp5100, that the MMIO
> address (0x51413120) is already used by System RAM
> (00100000-7c2befff)...
>
> [   29.928096] sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver v0.05
> [   29.928302] sp5100_tco: PCI Vendor ID: 0x1022, Device ID: 0x790b, Revision ID: 0x4a
> [   29.928319] sp5100_tco: Got 0x51413120 from indirect I/O
> [   29.928323] sp5100_tco: MMIO address 0x51413120 already in use
> [   29.928332] sp5100_tco: SBResource_MMIO is disabled(0xe000a0)
> [   29.928333] sp5100_tco: failed to find MMIO address, giving up.
>
If I understand the code correctly, the problem is really "SBResource_MMIO is disabled".
Presumably that is done in the BIOS. No idea if anything can be done about that.

Guenter

> 00100000-7c2befff : System RAM
>    01000000-017b1ab3 : Kernel code
>    017b1ab4-01d4ce7f : Kernel data
>    01ec4000-02008fff : Kernel bss
> 7c2bf000-7c8befff : reserved
> 7c8bf000-7cbbefff : ACPI Non-volatile Storage
>    7cbb6000-7cbb9fff : MSFT0101:00
>    7cbba000-7cbbdfff : MSFT0101:00
> 7cbbf000-7cbfefff : ACPI Tables
> 7cbff000-7cbfffff : System RAM
> 7cc00000-7effffff : reserved
>
> Any idea?
>
> Thanks,
> Rui
> --
> To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Re: An issue about sp5100 watchdog

[Huang Rui]

On Mon, Dec 07, 2015 at 11:03:31PM -0800, Guenter Roeck wrote:
> On 12/07/2015 09:42 PM, Huang Rui wrote:
> >Hi all,
> >
> >I found an issue in some of AMD platforms about sp5100, that the MMIO
> >address (0x51413120) is already used by System RAM
> >(00100000-7c2befff)...
> >
> >[   29.928096] sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver v0.05
> >[   29.928302] sp5100_tco: PCI Vendor ID: 0x1022, Device ID: 0x790b, Revision ID: 0x4a
> >[   29.928319] sp5100_tco: Got 0x51413120 from indirect I/O
> >[   29.928323] sp5100_tco: MMIO address 0x51413120 already in use
> >[   29.928332] sp5100_tco: SBResource_MMIO is disabled(0xe000a0)
> >[   29.928333] sp5100_tco: failed to find MMIO address, giving up.
> >
> If I understand the code correctly, the problem is really "SBResource_MMIO is disabled".
> Presumably that is done in the BIOS. No idea if anything can be done about that.
> 

Thank you.

Compared with correct message:

00100000-3e4befff : System RAM
  01000000-017b1ab3 : Kernel code
  017b1ab4-01d4ce7f : Kernel data
  01ec4000-02008fff : Kernel bss
3e4bf000-3e8befff : reserved
3e8bf000-3ebbefff : ACPI Non-volatile Storage
3ebqbf000-3ebfefff : ACPI Tables
3ebff000-3ebfffff : System RAM
3ec00000-7effffff : reserved
  51413120-51413127 : SB800 TCO         <- here
7f000000-f7ffffff : PCI Bus 0000:00

SB800 TCO area is reserved. Then it doesn't find MMIO address from
SBResource_MMIO register...

Thanks,
Rui

> Guenter
> 
> >00100000-7c2befff : System RAM
> >   01000000-017b1ab3 : Kernel code
> >   017b1ab4-01d4ce7f : Kernel data
> >   01ec4000-02008fff : Kernel bss
> >7c2bf000-7c8befff : reserved
> >7c8bf000-7cbbefff : ACPI Non-volatile Storage
> >   7cbb6000-7cbb9fff : MSFT0101:00
> >   7cbba000-7cbbdfff : MSFT0101:00
> >7cbbf000-7cbfefff : ACPI Tables
> >7cbff000-7cbfffff : System RAM
> >7cc00000-7effffff : reserved
> >
> >Any idea?
> >
> >Thanks,
> >Rui
> >--
> >To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in
> >the body of a message to majordomo@vger.kernel.org
> >More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >
>