[v3,0/7] Improvements to pcie_bandwidth_available() for eGPUs

Message

Mario Limonciello Nov. 14, 2023, 8:07 p.m. UTC

The wrong values are reported from pcie_bandwidth_available() which
can cause problems for performance of eGPUs.

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

v2->v3:
 * Stop lumping all thunderbolt VSEC and USB4 devices together, introduce
   is_virtual_link instead
 * Drop unnecessary patches

Mario Limonciello (7):
  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: pciehp: Move check for is_thunderbolt into a quirk
  PCI: ACPI: Detect PCIe root ports that are used for tunneling
  PCI: Split up some logic in pcie_bandwidth_available() to separate
    function
  PCI: Exclude PCIe ports used for virtual links in
    pcie_bandwidth_available()

 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                      | 77 +++++++++++++++++---------
 drivers/pci/quirks.c                   | 20 +++++++
 include/linux/pci.h                    | 24 +-------
 8 files changed, 97 insertions(+), 58 deletions(-)

base-commit: b85ea95d086471afb4ad062012a4d73cd328fa86