[PATCH v2 0/9] Improvements to pcie_bandwidth_available() for eGPUs

[Mario Limonciello]

Downstream drivers are getting the wrong values from
pcie_bandwidth_available() which is causing problems for performance
of eGPUs.

This series overhauls Thunderbolt related device detection and uses
the changes to change the behavior of pcie_bandwidth_available().

NOTE: This series is currently based on top of v6.6 + this change that
      will be merged for 6.7:
Link: https://patchwork.freedesktop.org/patch/564738/

v1->v2:
 * Rename is_thunderbolt
 * Look for _DSD instead of link
 * Drop pci_is_thunderbolt_attached() from all drivers
 * Adjust links
 * Adjust commit messages
 * Add quirk for Tiger Lake

Mario Limonciello (9):
  drm/nouveau: Switch from pci_is_thunderbolt_attached() to
    dev_is_removable()
  drm/radeon: Switch from pci_is_thunderbolt_attached() to
    dev_is_removable()
  PCI: Drop pci_is_thunderbolt_attached()
  PCI: Move the `PCI_CLASS_SERIAL_USB_USB4` definition to common header
  PCI: pciehp: Move check for is_thunderbolt into a quirk
  PCI: Rename is_thunderbolt to is_tunneled
  PCI: ACPI: Detect PCIe root ports that are used for tunneling
  PCI: Exclude PCIe ports used for tunneling in
    pcie_bandwidth_available()
  PCI: Add a quirk to mark 0x8086 : 0x9a23 as supporting PCIe tunneling

 drivers/gpu/drm/nouveau/nouveau_vga.c  |  6 +-
 drivers/gpu/drm/radeon/radeon_device.c |  4 +-
 drivers/gpu/drm/radeon/radeon_kms.c    |  2 +-
 drivers/pci/hotplug/pciehp_hpc.c       |  6 +-
 drivers/pci/pci-acpi.c                 | 16 ++++++
 drivers/pci/pci.c                      | 76 +++++++++++++++++---------
 drivers/pci/probe.c                    |  2 +-
 drivers/pci/quirks.c                   | 31 +++++++++++
 drivers/platform/x86/apple-gmux.c      |  2 +-
 drivers/thunderbolt/nhi.h              |  2 -
 include/linux/pci.h                    | 25 +--------
 include/linux/pci_ids.h                |  1 +
 12 files changed, 109 insertions(+), 64 deletions(-)

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2.34.1