queue-5.10/pci-dpc-quirk-pio-log-size-for-intel-raptor-lake-roo.patch

   1 From db64fef2c39c0ae81a9e7342ebde8ffac31fcd81 Mon Sep 17 00:00:00 2001
   2 From: Sasha Levin <sashal@kernel.org>
   3 Date: Tue, 5 Mar 2024 12:30:56 +0100
   4 Subject: PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports
   5
   6 From: Paul Menzel <pmenzel@molgen.mpg.de>
   7
   8 [ Upstream commit 627c6db20703b5d18d928464f411d0d4ec327508 ]
   9
  10 Commit 5459c0b70467 ("PCI/DPC: Quirk PIO log size for certain Intel Root
  11 Ports") and commit 3b8803494a06 ("PCI/DPC: Quirk PIO log size for Intel Ice
  12 Lake Root Ports") add quirks for Ice, Tiger and Alder Lake Root Ports.
  13 System firmware for Raptor Lake still has the bug, so Linux logs the
  14 warning below on several Raptor Lake systems like Dell Precision 3581 with
  15 Intel Raptor Lake processor (0W18NX) system firmware/BIOS version 1.10.1.
  16
  17   pci 0000:00:07.0: [8086:a76e] type 01 class 0x060400
  18   pci 0000:00:07.0: DPC: RP PIO log size 0 is invalid
  19   pci 0000:00:07.1: [8086:a73f] type 01 class 0x060400
  20   pci 0000:00:07.1: DPC: RP PIO log size 0 is invalid
  21
  22 Apply the quirk for Raptor Lake Root Ports as well.
  23
  24 This also enables the DPC driver to dump the RP PIO Log registers when DPC
  25 is triggered.
  26
  27 Link: https://lore.kernel.org/r/20240305113057.56468-1-pmenzel@molgen.mpg.de
  28 Reported-by: Niels van Aert <nvaert1986@hotmail.com>
  29 Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218560
  30 Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
  31 Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  32 Cc: <stable@vger.kernel.org>
  33 Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
  34 Cc: Niels van Aert <nvaert1986@hotmail.com>
  35 Signed-off-by: Sasha Levin <sashal@kernel.org>
  36 ---
  37  drivers/pci/quirks.c | 2 ++
  38  1 file changed, 2 insertions(+)
  39
  40 diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
  41 index a467e3ce6fb10..eca4ed45bb4ee 100644
  42 --- a/drivers/pci/quirks.c
  43 +++ b/drivers/pci/quirks.c
  44 @@ -5944,4 +5944,6 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2b, dpc_log_size);
  45  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size);
  46  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size);
  47  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size);
  48 +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa73f, dpc_log_size);
  49 +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa76e, dpc_log_size);
  50  #endif
  51 --
  52 2.43.0
  53