linux-toradex.git/arch/ia64/pci, branch v3.12

PCI: Replace printks with appropriate pr_*()

2013-06-18T16:49:23+00:00

Replace deprecated printk(KERN_ERR...) with pr_err() in arch/ia64/pci/pci.c

Signed-off-by: Yijing Wang 
Cc: Fenghua Yu 
Cc: Yinghai Lu 
Cc: Greg Kroah-Hartman 
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck

PCI/IA64: introduce probe_pci_root_info() to manage _CRS resource

2013-06-18T16:48:34+00:00

Currently, initialize _CRS resource code in IA64 make pci_acpi_scan_root()
some lengthiness. Introduce probe_pci_root_info() to manage it like in X86,

Signed-off-by: Yijing Wang 
Cc: Fenghua Yu 
Cc: Yinghai Lu 
Cc: Greg Kroah-Hartman 
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck

PCI/IA64: Add host bridge resource release for _CRS path

2013-06-18T16:47:33+00:00

Set IA64 host bridge release function to make sure root bridge
related resources get freed during root bus removal.

Signed-off-by: Yijing Wang 
Signed-off-by: Jiang Liu 
Cc: Fenghua Yu 
Cc: Yinghai Lu 
Cc: Greg Kroah-Hartman 
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck

PCI/IA64: fix memleak for create pci root bus fail

2013-06-18T16:46:22+00:00

If pci_create_root_bus() return fail, we should release
pci root info, pci controller etc.

Signed-off-by: Jiang Liu 
Signed-off-by: Yijing Wang 
Cc: Fenghua Yu 
Cc: Yinghai Lu 
Cc: Greg Kroah-Hartman 
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck

PCI/IA64: Allocate pci_root_info instead of using stack

2013-06-18T16:44:59+00:00

We need to pass around info for release function.

Signed-off-by: Yijing Wang 
Signed-off-by: Jiang Liu 
Cc: Fenghua Yu 
Cc: Yinghai Lu 
Cc: Greg Kroah-Hartman 
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck

PCI/IA64: embed pci hostbridge resources into pci_root_info

2013-06-18T16:44:10+00:00

Currently, pcibios_resource_to_bus() and pcibios_bus_to_resource()
functions use pci_host_bridge to translate bus side address from/to
cpu side address. The pci_window in pci_controller never be used again.
So we remove pci_window in pci_controller and embed hostbridge resource
into pci_root_info. Bjorn suggested to implement hostbridge resources
release in IA64 like in X86, this patch is to prepare for that.

Signed-off-by: Yijing Wang 
Signed-off-by: Jiang Liu 
Cc: Fenghua Yu 
Cc: Yinghai Lu 
Cc: Greg Kroah-Hartman 
Cc: Thierry Reding 
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck

ia64/PCI: Implement pcibios_{add|remove}_bus() hooks

2013-04-12T21:38:25+00:00

Implement pcibios_{add|remove}_bus() hooks for IA64 platforms.

Signed-off-by: Jiang Liu 
Signed-off-by: Yijing Wang 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Yinghai Lu 
Cc: "Rafael J. Wysocki" 
Cc: Toshi Kani 
Cc: Tony Luck 
Cc: Fenghua Yu

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

2013-02-26T05:18:18+00:00

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
  ...

ACPI / PCI: Set root bridge ACPI handle in advance

2013-01-14T00:14:28+00:00

The ACPI handles of PCI root bridges need to be known to
acpi_bind_one(), so that it can create the appropriate
"firmware_node" and "physical_node" files for them, but currently
the way it gets to know those handles is not exactly straightforward
(to put it lightly).

This is how it works, roughly:

  1. acpi_bus_scan() finds the handle of a PCI root bridge,
     creates a struct acpi_device object for it and passes that
     object to acpi_pci_root_add().

  2. acpi_pci_root_add() creates a struct acpi_pci_root object,
     populates its "device" field with its argument's address
     (device->handle is the ACPI handle found in step 1).

  3. The struct acpi_pci_root object created in step 2 is passed
     to pci_acpi_scan_root() and used to get resources that are
     passed to pci_create_root_bus().

  4. pci_create_root_bus() creates a struct pci_host_bridge object
     and passes its "dev" member to device_register().

  5. platform_notify(), which for systems with ACPI is set to
     acpi_platform_notify(), is called.

So far, so good.  Now it starts to be "interesting".

  6. acpi_find_bridge_device() is used to find the ACPI handle of
     the given device (which is the PCI root bridge) and executes
     acpi_pci_find_root_bridge(), among other things, for the
     given device object.

  7. acpi_pci_find_root_bridge() uses the name (sic!) of the given
     device object to extract the segment and bus numbers of the PCI
     root bridge and passes them to acpi_get_pci_rootbridge_handle().

  8. acpi_get_pci_rootbridge_handle() browses the list of ACPI PCI
     root bridges and finds the one that matches the given segment
     and bus numbers.  Its handle is then used to initialize the
     ACPI handle of the PCI root bridge's device object by
     acpi_bind_one().  However, this is *exactly* the ACPI handle we
     started with in step 1.

Needless to say, this is quite embarassing, but it may be avoided
thanks to commit f3fd0c8 (ACPI: Allow ACPI handles of devices to be
initialized in advance), which makes it possible to initialize the
ACPI handle of a device before passing it to device_register().

Accordingly, add a new __weak routine, pcibios_root_bridge_prepare(),
defaulting to an empty implementation that can be replaced by the
interested architecutres (x86 and ia64 at the moment) with functions
that will set the root bridge's ACPI handle before its dev member is
passed to device_register().  Make both x86 and ia64 provide such
implementations of pcibios_root_bridge_prepare() and remove
acpi_pci_find_root_bridge() and acpi_get_pci_rootbridge_handle() that
aren't necessary any more.

Included is a fix for breakage on systems with non-ACPI PCI host
bridges from Bjorn Helgaas.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Bjorn Helgaas

IA64: drivers: remove __dev* attributes.

2013-01-03T23:57:13+00:00

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton 
Cc: Tony Luck 
Cc: Fenghua Yu 
Signed-off-by: Greg Kroah-Hartman