Commit Graph

440894 Commits

Author SHA1 Message Date
Ryan Desfosses 3c78bc61f5 PCI: Whitespace cleanup
Fix various whitespace errors.

No functional change.

[bhelgaas: fix other similar problems]
Signed-off-by: Ryan Desfosses <ryan@desfo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-06-10 20:20:19 -06:00
Ryan Desfosses b7fe943421 PCI: Move EXPORT_SYMBOL so it immediately follows function/variable
Move EXPORT_SYMBOL so it immediately follows the function or variable.

No functional change.

[bhelgaas: squash similar changes, fix hotplug, probe, rom, search, too]
Signed-off-by: Ryan Desfosses <ryan@desfo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-06-10 13:36:10 -06:00
Bjorn Helgaas 843a85ced9 Merge branches 'pci/host-designware', 'pci/host-imx6', 'pci/host-mvebu' and 'pci/host-tegra' into next
* pci/host-designware:
  PCI: designware: Remove unnecessary use of 'conf_lock' spinlock
  PCI: designware: Use new OF interrupt mapping when possible
  PCI: designware: Fix iATU programming for cfg1, io and mem viewport
  PCI: designware: Fix comment for setting number of lanes

* pci/host-imx6:
  PCI: designware: Split Exynos and i.MX bindings

* pci/host-mvebu:
  PCI: mvebu: Use '%pa' for printing 'phys_addr_t' type
  PCI: mvebu: Remove unnecessary use of 'conf_lock' spinlock
  PCI: mvebu: split PCIe BARs into multiple MBus windows when needed
  bus: mvebu-mbus: allow several windows with the same target/attribute
  bus: mvebu-mbus: Avoid setting an undefined window size
  PCI: mvebu: fix off-by-one in the computed size of the mbus windows

* pci/host-tegra:
  PCI: tegra: Use new OF interrupt mapping when possible
2014-06-03 08:45:42 -06:00
Lucas Stach 1db823ee9f PCI: designware: Split Exynos and i.MX bindings
The glue around the core designware IP is significantly different between
the Exynos and i.MX implementation, which is reflected in the DT bindings.

This changes the i.MX6 binding to reuse as much as possible from the common
designware binding and removes old cruft.

I removed the optional GPIOs with the following reasoning:
- disable-gpio: endpoint specific GPIO, not currently wired up in any code.
  Should be handled by the PCI device driver, not the host controller
  driver.
- wake-up-gpio: same as above.
- power-on-gpio: No user in any upstream DT.  This should be handled by a
  regulator which shouldn't be controlled by the host driver, but rather by
  the PCI device driver.

[bhelgaas: whitespace fixes]
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-06-03 08:44:25 -06:00
Bjorn Helgaas 0eeb4f2af5 Merge branch 'pci/iommu' into next
* pci/iommu:
  PCI: Add bridge DMA alias quirk for ASMedia and Tundra bridges
  PCI: Add support for PCIe-to-PCI bridge DMA alias quirks
  PCI: Add function 1 DMA alias quirk for Marvell devices
  PCI: Add function 0 DMA alias quirk for Ricoh devices
  PCI: Add support for DMA alias quirks
  PCI: Convert pci_dev_flags definitions to bit shifts
  PCI: Add DMA alias iterator
2014-06-02 16:18:48 -06:00
Bjorn Helgaas 617b4157a5 Merge branches 'pci/host-exynos', 'pci/host-imx6', 'pci/resource' and 'pci/misc' into next
* pci/host-exynos:
  PCI: exynos: Fix add_pcie_port() section mismatch warning

* pci/host-imx6:
  PCI: imx6: Add support for MSI
  PCI: designware: Make MSI ISR shared IRQ aware
  PCI: imx6: Remove optional (and unused) IRQs
  PCI: imx6: Drop old IRQ mapping
  PCI: imx6: Use new clock names
  PCI: imx6: Fix imx6_add_pcie_port() section mismatch warning

* pci/resource:
  i82875p_edac: Assign PCI resources before adding device

* pci/misc:
  ARM/PCI: Call pcie_bus_configure_settings() to set MPS
  PCI: Make pci_bus_add_device() void

Conflicts:
	drivers/edac/i82875p_edac.c
2014-05-30 11:41:17 -06:00
Bjorn Helgaas d785260e2f Merge branch 'pci/host-generic' into next
* pci/host-generic:
  MAINTAINERS: Add generic PCI host controller driver
  PCI: generic: Add generic PCI host controller driver

Conflicts:
	drivers/pci/host/Kconfig
	drivers/pci/host/Makefile
2014-05-30 11:40:13 -06:00
Will Deacon cf28855ba7 MAINTAINERS: Add generic PCI host controller driver
Add myself as the maintainer for the generic PCI host controller driver.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
2014-05-30 11:34:49 -06:00
Will Deacon ce292991d8 PCI: generic: Add generic PCI host controller driver
Add support for a generic PCI host controller, such as a
firmware-initialised device with static windows or an emulation by
something such as kvmtool.

The controller itself has no configuration registers and has its address
spaces described entirely by the device-tree (using the bindings from
ePAPR).  Both CAM and ECAM are supported for Config Space accesses.

Add corresponding documentation for the DT binding.

[bhelgaas: currently uses the ARM-specific pci_common_init_dev() interface]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
2014-05-30 11:34:49 -06:00
Lucas Stach d1dc9749a5 PCI: imx6: Add support for MSI
This patch adds support for Message Signaled Interrupts in the imx6-pcie
driver.

Signed-off-by: Harro Haan <hrhaan@gmail.com>
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30 11:27:19 -06:00
Lucas Stach 7f4f16eef5 PCI: designware: Make MSI ISR shared IRQ aware
On i.MX6 the host controller MSI IRQ is shared with PCI legacy INTD.  Make
sure we don't bail too early from the IRQ handler.

The issue is fairly theoretical as it would require a system setup with a
PCIe switch where one connected device is using legacy INTD and another one
using MSI, but better fix it now.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30 11:24:58 -06:00
Lucas Stach 5c40eea778 PCI: imx6: Remove optional (and unused) IRQs
They are dropped with the new binding.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30 11:24:39 -06:00
Lucas Stach e521519a84 PCI: imx6: Drop old IRQ mapping
We don't need this anymore.  The IRQs are now properly mapped through the
DT.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30 11:24:34 -06:00
Lucas Stach 5752613653 PCI: imx6: Use new clock names
As defined in the new binding.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30 11:22:46 -06:00
Yinghai Lu 06b00514b7 i82875p_edac: Assign PCI resources before adding device
Assign PCI resources before pci_bus_add_device().  The resources must be
assigned before a driver can claim the device.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-30 10:56:46 -06:00
Murali Karicheri 8b5742ad15 ARM/PCI: Call pcie_bus_configure_settings() to set MPS
Call pcie_bus_configure_settings() on ARM, like for other platforms.
pcie_bus_configure_settings() makes sure the MPS across the bus is uniform
and provides the ability to tune the MRSS and MPS to higher performance
values.  This is particularly important for embedded where there is no
firmware to program these PCIe settings for the OS.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Russell King <linux@arm.linux.org.uk>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
CC: Santosh Shilimkar <santosh.shilimkar@ti.com>
2014-05-30 10:50:57 -06:00
Sachin Kamat 44cb5e94f9 PCI: imx6: Fix imx6_add_pcie_port() section mismatch warning
imx6_add_pcie_port() is called only from from imx6_pcie_probe() which is
annotated with __init.  Thus it makes sense to annotate
imx6_add_pcie_port() with __init to avoid section mismatch warnings.

[bhelgaas: changelog]
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Sean Cross <xobs@kosagi.com>
2014-05-30 09:45:58 -06:00
Yijing Wang c893d133ea PCI: Make pci_bus_add_device() void
pci_bus_add_device() always returns 0, so there's no point in returning
anything at all.  Make it a void function and remove the tests of the
return value from the callers.

[bhelgaas: changelog, remove unused "err" from i82875p_setup_overfl_dev()]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-30 09:34:27 -06:00
Sachin Kamat 17d7acc8e1 PCI: exynos: Fix add_pcie_port() section mismatch warning
add_pcie_port() is called only from exynos_pcie_probe(), which is annotated
with __init.  Thus it makes sense to annotate add_pcie_port() with __init
to avoid the following section mismatch warning:

  WARNING: drivers/pci/built-in.o(.text.unlikely+0xf8): Section mismatch in reference from the function add_pcie_port() to the function .init.text:dw_pcie_host_init()
    The function add_pcie_port() references
    the function __init dw_pcie_host_init().
    This is often because add_pcie_port lacks a __init
    annotation or the annotation of dw_pcie_host_init is wrong.

[bhelgaas: changelog]
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
2014-05-29 16:16:07 -06:00
Bjorn Helgaas fdaf36bd36 Merge branch 'pci/misc' into next
* pci/misc:
  PCI: Fix return value from pci_user_{read,write}_config_*()
  PCI: Turn pcibios_penalize_isa_irq() into a weak function
  PCI: Test for std config alias when testing extended config space
2014-05-28 16:21:25 -06:00
Bjorn Helgaas d1a2523d2a Merge branches 'pci/hotplug', 'pci/pci_is_bridge' and 'pci/virtualization' into next
* pci/hotplug:
  PCI: cpqphp: Fix possible null pointer dereference
  NVMe: Implement PCIe reset notification callback
  PCI: Notify driver before and after device reset

* pci/pci_is_bridge:
  pcmcia: Use pci_is_bridge() to simplify code
  PCI: pciehp: Use pci_is_bridge() to simplify code
  PCI: acpiphp: Use pci_is_bridge() to simplify code
  PCI: cpcihp: Use pci_is_bridge() to simplify code
  PCI: shpchp: Use pci_is_bridge() to simplify code
  PCI: rpaphp: Use pci_is_bridge() to simplify code
  sparc/PCI: Use pci_is_bridge() to simplify code
  powerpc/PCI: Use pci_is_bridge() to simplify code
  ia64/PCI: Use pci_is_bridge() to simplify code
  x86/PCI: Use pci_is_bridge() to simplify code
  PCI: Use pci_is_bridge() to simplify code
  PCI: Add new pci_is_bridge() interface
  PCI: Rename pci_is_bridge() to pci_has_subordinate()

* pci/virtualization:
  PCI: Introduce new device binding path using pci_dev.driver_override

Conflicts:
	drivers/pci/pci-sysfs.c
2014-05-28 16:21:07 -06:00
Bjorn Helgaas 79d458bf47 Merge branches 'pci/host-exynos', 'pci/host-rcar' and 'pci/amd-numa' into next
* pci/host-exynos:
  PCI: exynos: Remove unnecessary OOM messages

* pci/host-rcar:
  PCI: rcar: Add gen2 device tree support
  PCI: rcar: Add R-Car PCIe device tree bindings
  PCI: rcar: Add MSI support for PCIe
  PCI: rcar: Add Renesas R-Car PCIe driver
  PCI: rcar: Use new OF interrupt mapping when possible

* pci/amd-numa:
  x86/PCI: Clean up and mark early_root_info_init() as deprecated
  x86/PCI: Work around AMD Fam15h BIOSes that fail to provide _PXM
  x86/PCI: Warn if we have to "guess" host bridge node information
2014-05-28 16:16:27 -06:00
Alex Williamson 782a985d7a PCI: Introduce new device binding path using pci_dev.driver_override
The driver_override field allows us to specify the driver for a device
rather than relying on the driver to provide a positive match of the
device.  This shortcuts the existing process of looking up the vendor and
device ID, adding them to the driver new_id, binding the device, then
removing the ID, but it also provides a couple advantages.

First, the above existing process allows the driver to bind to any device
matching the new_id for the window where it's enabled.  This is often not
desired, such as the case of trying to bind a single device to a meta
driver like pci-stub or vfio-pci.  Using driver_override we can do this
deterministically using:

  echo pci-stub > /sys/bus/pci/devices/0000:03:00.0/driver_override
  echo 0000:03:00.0 > /sys/bus/pci/devices/0000:03:00.0/driver/unbind
  echo 0000:03:00.0 > /sys/bus/pci/drivers_probe

Previously we could not invoke drivers_probe after adding a device to
new_id for a driver as we get non-deterministic behavior whether the driver
we intend or the standard driver will claim the device.  Now it becomes a
deterministic process, only the driver matching driver_override will probe
the device.

To return the device to the standard driver, we simply clear the
driver_override and reprobe the device:

  echo > /sys/bus/pci/devices/0000:03:00.0/driver_override
  echo 0000:03:00.0 > /sys/bus/pci/devices/0000:03:00.0/driver/unbind
  echo 0000:03:00.0 > /sys/bus/pci/drivers_probe

Another advantage to this approach is that we can specify a driver override
to force a specific binding or prevent any binding.  For instance when an
IOMMU group is exposed to userspace through VFIO we require that all
devices within that group are owned by VFIO.  However, devices can be
hot-added into an IOMMU group, in which case we want to prevent the device
from binding to any driver (override driver = "none") or perhaps have it
automatically bind to vfio-pci.  With driver_override it's a simple matter
for this field to be set internally when the device is first discovered to
prevent driver matches.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28 16:04:53 -06:00
Alex Williamson ebdb51eb78 PCI: Add bridge DMA alias quirk for ASMedia and Tundra bridges
The quirk is intended to be extremely generic, but we only apply it to
known offending devices.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=44881
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 15:52:52 -06:00
Alex Williamson c8fe16e3f9 PCI: Add support for PCIe-to-PCI bridge DMA alias quirks
Several PCIe-to-PCI bridges fail to provide a PCIe capability, causing us
to handle them as conventional PCI devices when they really use the
requester ID of the secondary bus.  We need to differentiate these from
PCIe-to-PCI bridges that actually use the conventional PCI ID when a PCIe
capability is not present, such as those found on the root complex of may
Intel chipsets.  Add a dev_flag bit to identify devices to be handled as
standard PCIe-to-PCI bridges.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 15:52:52 -06:00
Alex Williamson cc346a4714 PCI: Add function 1 DMA alias quirk for Marvell devices
Several Marvell devices and a JMicron device have a similar DMA requester
ID problem to Ricoh, except they use function 1 as the PCIe requester ID.
Add a quirk for these to populate the DMA alias with the correct devfn.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=42679
Tested-by: George Spelvin <linux@horizon.com>
Tested-by: Andreas Schrägle <ajs124.ajs124@gmail.com>
Tested-by: Tobias N <qemu@suppser.de>
Tested-by: <daxcore@online.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 15:48:03 -06:00
Alex Williamson ec637fb2d4 PCI: Add function 0 DMA alias quirk for Ricoh devices
The existing quirk for these devices (pci_get_dma_source()) doesn't really
solve the problem; re-implement it using the DMA alias iterator.  We'll
come back later and remove the existing quirk and dma_source interface.
Note that device ID 0xe822 is typically function 0 and 0xe230 has been
tested to not need the quirk and are therefore removed versus the
equivalent dma_source quirk.  If there exist in other configurations we can
re-add them.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=605888
Tested-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 15:20:45 -06:00
Alex Williamson 31c2b8153c PCI: Add support for DMA alias quirks
Some devices are broken and use a requester ID other than their physical
devfn.  Add a byte, using an existing gap in the pci_dev structure, to
store an alternate "alias" devfn.  A bit in the dev_flags tells us when
this is valid.  We then add the alias as one more step in the
pci_for_each_dma_alias() iterator.

Tested-by: George Spelvin <linux@horizon.com>
Tested-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 15:20:31 -06:00
Alex Williamson 6b121592f8 PCI: Convert pci_dev_flags definitions to bit shifts
Convert the pci_dev_flags definitions from decimal constants to bit shifts.
We're only a few entries away from where using the decimal value becomes
cumbersome.  No functional change.

Tested-by: George Spelvin <linux@horizon.com>
Tested-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 15:20:18 -06:00
Alex Williamson c25dc82899 PCI: Add DMA alias iterator
In a mixed PCI/PCI-X/PCIe topology, bridges can take ownership of
transactions, replacing the original requester ID with their own.
Sometimes we just want to know the resulting device or resulting alias;
other times we want each step in the chain.  This iterator allows either
usage.  When an endpoint is connected via an unbroken chain of PCIe
switches and root ports, it has no alias and its requester ID is visible to
the root bus.  When PCI/X get in the way, we pick up aliases for bridges.

The reason why we potentially care about each step in the path is because
of PCI-X.  PCI-X has the concept of a requester ID, but bridges may or may
not take ownership of various types of transactions.  We therefore leave it
to the consumer of this function to prune out what they don't care about
rather than attempt to flatten the alias ourselves.

Tested-by: George Spelvin <linux@horizon.com>
Tested-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-28 11:46:24 -06:00
Ben Dooks d47b62f4b1 PCI: rcar: Add gen2 device tree support
Add device tree probing support to the 'pci-rcar-gen2' driver.

[Sergei: numerous fixes/cleanups/additions]
[bhelgaas: whitespace fix]
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-28 07:47:55 -06:00
Rickard Strandqvist cab9a128da PCI: cpqphp: Fix possible null pointer dereference
There is otherwise a risk of a null pointer dereference.

Found by cppcheck, a static code analysis program.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 20:51:14 -06:00
Phil Edworthy 7869fc6e29 PCI: rcar: Add R-Car PCIe device tree bindings
This patch adds the bindings for the R-Car PCIe driver.  The driver resides
under drivers/pci/host/pcie-rcar.c

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
2014-05-27 20:41:27 -06:00
Phil Edworthy 290c1fb358 PCI: rcar: Add MSI support for PCIe
Add MSI support to the R-Car PCIe driver.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
2014-05-27 20:39:17 -06:00
Phil Edworthy c25da47788 PCI: rcar: Add Renesas R-Car PCIe driver
This PCIe Host driver currently does not support MSI, so cards fall back to
INTx interrupts.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
2014-05-27 20:37:37 -06:00
Gavin Shan d97ffe2368 PCI: Fix return value from pci_user_{read,write}_config_*()
The PCI user-space config accessors pci_user_{read,write}_config_*() return
negative error numbers, which were introduced by commit 34e3207205
("PCI: handle positive error codes").  That patch converted all positive
error numbers from platform-specific PCI config accessors to -EINVAL, which
means the callers don't know anything about the specific cause of the
failure.

The patch fixes the issue by converting the positive PCIBIOS_* error values
to generic negative error numbers with pcibios_err_to_errno().

[bhelgaas: changelog]
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Thelen <gthelen@google.com>
2014-05-27 17:10:16 -06:00
Jingoo Han 755ba5e406 PCI: exynos: Remove unnecessary OOM messages
The site-specific OOM messages are unnecessary, because they duplicate the
MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 16:58:00 -06:00
Hanjun Guo a43ae58c84 PCI: Turn pcibios_penalize_isa_irq() into a weak function
pcibios_penalize_isa_irq() is only implemented by x86 now, and legacy ISA
is not used by some architectures.  Make pcibios_penalize_isa_irq() a
__weak function to simplify the code.  This removes the need for new
platforms to add stub implementations of pcibios_penalize_isa_irq().

[bhelgaas: changelog, comments]
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-27 16:23:58 -06:00
Alex Williamson 78916b00f0 PCI: Test for std config alias when testing extended config space
When a PCI-to-PCIe bridge is stacked on a PCIe-to-PCI bridge, we can have
PCIe endpoints masked by a conventional PCI bus.  This makes the extended
config space of the PCIe endpoint inaccessible.  The PCIe-to-PCI bridge is
supposed to handle any type 1 configuration transactions where the extended
config offset bits are non-zero as an Unsupported Request rather than
forward it to the secondary interface.  As noted here, there are a couple
known offenders to this rule.  These bridges drop the extended offset bits,
resulting in the conventional config space being aliased many times across
the extended config space.  For Intel NICs, this alias often seems to
expose a bogus SR-IOV cap.

Stacking bridges may seem like an uncommon scenario, but note that any
conventional PCI slot in a modern PC is already the secondary interface of
an onboard PCIe-to-PCI bridge.  The user need only add a PCI-to-PCIe
adapter and PCIe device to encounter this problem.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 15:07:41 -06:00
Yijing Wang 56604faed1 pcmcia: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:58:24 -06:00
Yijing Wang 930067e235 PCI: pciehp: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:58:18 -06:00
Yijing Wang c7a071f6a9 PCI: acpiphp: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:58:13 -06:00
Yijing Wang 5cbe5d15ae PCI: cpcihp: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:58:07 -06:00
Yijing Wang 087cfa93e0 PCI: shpchp: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:58:01 -06:00
Yijing Wang f86e1f152e PCI: rpaphp: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-05-27 14:57:55 -06:00
Yijing Wang 2f22e68ab4 sparc/PCI: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: David S. Miller <davem@davemloft.net>
2014-05-27 14:57:47 -06:00
Yijing Wang c888770eb2 powerpc/PCI: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:57:36 -06:00
Yijing Wang 11a3bd095c ia64/PCI: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:57:16 -06:00
Yijing Wang 56a41f9949 x86/PCI: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:56:34 -06:00
Yijing Wang 6788a51fe3 PCI: Use pci_is_bridge() to simplify code
Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c94 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 14:53:41 -06:00