Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI changes from Bjorn Helgaas:
 "Host bridge hotplug
    - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu)
    - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu)
    - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu)
    - Stop caching _PRT and make independent of bus numbers (Yinghai Lu)

  PCI device hotplug
    - Clean up cpqphp dead code (Sasha Levin)
    - Disable ARI unless device and upstream bridge support it (Yijing Wang)
    - Initialize all hot-added devices (not functions 0-7) (Yijing Wang)

  Power management
    - Don't touch ASPM if disabled (Joe Lawrence)
    - Fix ASPM link state management (Myron Stowe)

  Miscellaneous
    - Fix PCI_EXP_FLAGS accessor (Alex Williamson)
    - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov)
    - Document hotplug resource and MPS parameters (Yijing Wang)
    - Add accessor for PCIe capabilities (Myron Stowe)
    - Drop pciehp suspend/resume messages (Paul Bolle)
    - Make pci_slot built-in only (not a module) (Jiang Liu)
    - Remove unused PCI/ACPI bind ops (Jiang Liu)
    - Removed used pci_root_bus (Bjorn Helgaas)"

* tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits)
  PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers
  PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS
  ACPI / PCI: Make pci_slot built-in only, not a module
  PCI/PM: Clear state_saved during suspend
  PCI: Use atomic_inc_return() rather than atomic_add_return()
  PCI: Catch attempts to disable already-disabled devices
  PCI: Disable Bus Master unconditionally in pci_device_shutdown()
  PCI: acpiphp: Remove dead code for PCI host bridge hotplug
  PCI: acpiphp: Create companion ACPI devices before creating PCI devices
  PCI: Remove unused "rc" in virtfn_add_bus()
  PCI: pciehp: Drop suspend/resume ENTRY messages
  PCI/ASPM: Don't touch ASPM if forcibly disabled
  PCI/ASPM: Deallocate upstream link state even if device is not PCIe
  PCI: Document MPS parameters pci=pcie_bus_safe, pci=pcie_bus_perf, etc
  PCI: Document hpiosize= and hpmemsize= resource reservation parameters
  PCI: Use PCI Express Capability accessor
  PCI: Introduce accessor to retrieve PCIe Capabilities Register
  PCI: Put pci_dev in device tree as early as possible
  PCI: Skip attaching driver in device_add()
  PCI: acpiphp: Keep driver loaded even if no slots found
  ...

1 files changed, 21 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 766087781ecd..1da946548772 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2262,6 +2262,21 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                 This sorting is done to get a device
                                 order compatible with older (<= 2.4) kernels.
                 nobfsort        Don't sort PCI devices into breadth-first order.
+                pcie_bus_tune_off       Disable PCIe MPS (Max Payload Size)
+                                tuning and use the BIOS-configured MPS defaults.
+                pcie_bus_safe   Set every device's MPS to the largest value
+                                supported by all devices below the root complex.
+                pcie_bus_perf   Set device MPS to the largest allowable MPS
+                                based on its parent bus. Also set MRRS (Max
+                                Read Request Size) to the largest supported
+                                value (no larger than the MPS that the device
+                                or bus can support) for best performance.
+                pcie_bus_peer2peer      Set every device's MPS to 128B, which
+                                every device is guaranteed to support. This
+                                configuration allows peer-to-peer DMA between
+                                any pair of devices, possibly at the cost of
+                                reduced performance.  This also guarantees
+                                that hot-added devices will work.
                 cbiosize=nn[KMG]        The fixed amount of bus space which is
                                 reserved for the CardBus bridge's IO window.
                                 The default value is 256 bytes.
@@ -2283,6 +2298,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                 the default.
                                 off: Turn ECRC off
                                 on: Turn ECRC on.
+                hpiosize=nn[KMG]        The fixed amount of bus space which is
+                                reserved for hotplug bridge's IO window.
+                                Default size is 256 bytes.
+                hpmemsize=nn[KMG]       The fixed amount of bus space which is
+                                reserved for hotplug bridge's memory window.
+                                Default size is 2 megabytes.
                 realloc=        Enable/disable reallocating PCI bridge resources
                                 if allocations done by BIOS are too small to
                                 accommodate resources required by all child