[PATCH] PCI/DPC: Yet another quirk for PIO log size on Intel Raptor Lake-P

[PATCH] PCI/DPC: Yet another quirk for PIO log size on Intel Raptor Lake-P

[Takashi Iwai]

There is yet another PCI entry for Intel Raptor Lake-P that shows the
  error "DPC: RP PIO log size 0 is invalid":
  0000:00:07.0 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #0 [8086:a76e]
  0000:00:07.2 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #2 [8086:a72f]

Add the corresponding quirk entry for 8086:a72f.

Note that the one for 8086:a76e has been already added by the commit
627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root
Ports").

Link: https://bugzilla.suse.com/show_bug.cgi?id=1234623
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/pci/quirks.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 76f4df75b08a..4ed3704ce92e 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -6253,6 +6253,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2b, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa72f, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa73f, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa76e, dpc_log_size);
 #endif
-- 
2.43.0

Re: [PATCH] PCI/DPC: Yet another quirk for PIO log size on Intel Raptor Lake-P

[Bjorn Helgaas]

On Thu, Jan 02, 2025 at 05:43:13PM +0100, Takashi Iwai wrote:
> There is yet another PCI entry for Intel Raptor Lake-P that shows the
>   error "DPC: RP PIO log size 0 is invalid":
>   0000:00:07.0 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #0 [8086:a76e]
>   0000:00:07.2 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #2 [8086:a72f]
> 
> Add the corresponding quirk entry for 8086:a72f.
> 
> Note that the one for 8086:a76e has been already added by the commit
> 627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root
> Ports").

Intel folks, what's the long-term resolution of this?  I'm kind of
tired of adding quirks like this.  So far we have these (not including
the current patch), dating back to Aug 2022:

  627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports")
  3b8803494a06 ("PCI/DPC: Quirk PIO log size for Intel Ice Lake Root Ports")
  5459c0b70467 ("PCI/DPC: Quirk PIO log size for certain Intel Root Ports")

I *thought* this problem was caused by BIOS defects that were supposed
to be fixed, but nothing seems to be happening.

If Linux can't figure out the correct value by itself (and I assume it
can't because we wouldn't need the register if we could), maybe we
can just silently ignore it and live without the RP logs?

> Link: https://bugzilla.suse.com/show_bug.cgi?id=1234623
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
> ---
>  drivers/pci/quirks.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 76f4df75b08a..4ed3704ce92e 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -6253,6 +6253,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2b, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size);
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa72f, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa73f, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa76e, dpc_log_size);
>  #endif
> -- 
> 2.43.0
> 

Re: [PATCH] PCI/DPC: Yet another quirk for PIO log size on Intel Raptor Lake-P

[Mika Westerberg]

Hi,

On Fri, Jan 03, 2025 at 04:53:15PM -0600, Bjorn Helgaas wrote:
> On Thu, Jan 02, 2025 at 05:43:13PM +0100, Takashi Iwai wrote:
> > There is yet another PCI entry for Intel Raptor Lake-P that shows the
> >   error "DPC: RP PIO log size 0 is invalid":
> >   0000:00:07.0 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #0 [8086:a76e]
> >   0000:00:07.2 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #2 [8086:a72f]
> > 
> > Add the corresponding quirk entry for 8086:a72f.
> > 
> > Note that the one for 8086:a76e has been already added by the commit
> > 627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root
> > Ports").
> 
> Intel folks, what's the long-term resolution of this?  I'm kind of
> tired of adding quirks like this.  So far we have these (not including
> the current patch), dating back to Aug 2022:
> 
>   627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports")
>   3b8803494a06 ("PCI/DPC: Quirk PIO log size for Intel Ice Lake Root Ports")
>   5459c0b70467 ("PCI/DPC: Quirk PIO log size for certain Intel Root Ports")
> 
> I *thought* this problem was caused by BIOS defects that were supposed
> to be fixed, but nothing seems to be happening.

As far as I know it should be fixed already. I just checked my MTLP and PTL
systems (both with integrated TBT PCIe root ports) and I don't see the
message anymore. I don't have RPL system though. This is on reference
hardware and BIOS so it is possible that the fix has not been taken into
the OEM BIOS.

Re: [PATCH] PCI/DPC: Yet another quirk for PIO log size on Intel Raptor Lake-P

[Takashi Iwai]

On Sun, 05 Jan 2025 09:25:20 +0100,
Mika Westerberg wrote:
> 
> Hi,
> 
> On Fri, Jan 03, 2025 at 04:53:15PM -0600, Bjorn Helgaas wrote:
> > On Thu, Jan 02, 2025 at 05:43:13PM +0100, Takashi Iwai wrote:
> > > There is yet another PCI entry for Intel Raptor Lake-P that shows the
> > >   error "DPC: RP PIO log size 0 is invalid":
> > >   0000:00:07.0 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #0 [8086:a76e]
> > >   0000:00:07.2 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #2 [8086:a72f]
> > > 
> > > Add the corresponding quirk entry for 8086:a72f.
> > > 
> > > Note that the one for 8086:a76e has been already added by the commit
> > > 627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root
> > > Ports").
> > 
> > Intel folks, what's the long-term resolution of this?  I'm kind of
> > tired of adding quirks like this.  So far we have these (not including
> > the current patch), dating back to Aug 2022:
> > 
> >   627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports")
> >   3b8803494a06 ("PCI/DPC: Quirk PIO log size for Intel Ice Lake Root Ports")
> >   5459c0b70467 ("PCI/DPC: Quirk PIO log size for certain Intel Root Ports")
> > 
> > I *thought* this problem was caused by BIOS defects that were supposed
> > to be fixed, but nothing seems to be happening.
> 
> As far as I know it should be fixed already. I just checked my MTLP and PTL
> systems (both with integrated TBT PCIe root ports) and I don't see the
> message anymore. I don't have RPL system though. This is on reference
> hardware and BIOS so it is possible that the fix has not been taken into
> the OEM BIOS.

The reporter verified that the issue persists with the latest BIOS.
Sigh.


Takashi

Re: [PATCH] PCI/DPC: Yet another quirk for PIO log size on Intel Raptor Lake-P

[Bjorn Helgaas]

On Thu, Jan 02, 2025 at 05:43:13PM +0100, Takashi Iwai wrote:
> There is yet another PCI entry for Intel Raptor Lake-P that shows the
>   error "DPC: RP PIO log size 0 is invalid":
>   0000:00:07.0 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #0 [8086:a76e]
>   0000:00:07.2 PCI bridge [0604]: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #2 [8086:a72f]
> 
> Add the corresponding quirk entry for 8086:a72f.
> 
> Note that the one for 8086:a76e has been already added by the commit
> 627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root
> Ports").
> 
> Link: https://bugzilla.suse.com/show_bug.cgi?id=1234623
> Signed-off-by: Takashi Iwai <tiwai@suse.de>

Applied to pci/dpc for v6.14, thanks!

> ---
>  drivers/pci/quirks.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 76f4df75b08a..4ed3704ce92e 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -6253,6 +6253,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2b, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size);
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa72f, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa73f, dpc_log_size);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa76e, dpc_log_size);
>  #endif
> -- 
> 2.43.0
>