* pci/host-designware:
  PCI: designware: Fix indent code style

Fix indent code style and replace 'MSI interrupt controller' of comment
with 'MSI controller' to fix the following checkpatch issues:

  ERROR: code indent should use tabs where possible
  WARNING: please, no spaces at the start of a line
  WARNING: line over 80 characters
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

* pci/misc:
  PCI/checkpatch: Deprecate DEFINE_PCI_DEVICE_TABLE

* pci/msi:
  PCI/MSI: Make pci_enable_msi/msix() 'nvec' argument type as int
  PCI/MSI: Return -ENOSYS for unimplemented interfaces, not -1
  PCI/MSI: Return msix_capability_init() failure if populate_msi_sysfs() fails
  s390/PCI: Remove superfluous check of MSI type
  s390/PCI: Fix single MSI only check
  PCI/MSI: Export MSI mode using attributes, not kobjects

* pci/deletion:
  PCI/portdrv: Remove extra get_device()/put_device() for pcie_device
  PCI/portdrv: Add put_device() after device_register() failure
  PCI/portdrv: Cleanup error paths

* pci/host-designware:
  PCI: designware: Fix I/O transfers by using CPU (not realio) address
  PCI: designware: Add dw_pcie prefix before cfg_read/write
  PCI: designware: Fix missing MSI IRQs

* pci/host-mvebu:
  PCI: mvebu: Remove redundant of_match_ptr

* pci/host-imx6:
  PCI: imx6: Fix bugs in PCIe startup code
  PCI: imx6: Start link in Gen1 before negotiating for Gen2 mode
  PCI: imx6: Factor out link up wait loop
  PCI: imx6: Factor out PHY reset
  PCI: imx6: Report "link up" only after link training completes
  PCI: imx6: Make reset-gpio optional

Make pci_enable_msi_block(), pci_enable_msi_block_auto() and
pci_enable_msix() consistent with regard to the type of 'nvec' argument.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tejun Heo <tj@kernel.org>

Suggested-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tejun Heo <tj@kernel.org>

If populate_msi_sysfs() function failed msix_capability_init() must return
the error code, but it returns the success instead.  This update fixes the
described misbehaviour.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tejun Heo <tj@kernel.org>

arch_setup_msi_irqs() hook can only be called from the generic MSI code
which ensures correct MSI type parameter.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

Multiple MSIs have never been supported on s390 architecture, but the
platform code fails to report single MSI only.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

pp->io_base, which is the input of the outbound IO address translation
unit, should be the CPU address.  It was incorrectly programmed to the
realio address.

We should pass global_io_offset rather than sys->io_offset to
pci_ioremap_io(), so we map the new window into the first available spot in
the Linux view of the I/O space.

We must also pass CPU address instead of realio address to pci_ioremap_io().

This patch fixes above issue.  It has been tested with Lecroy PTC in AIC
mode and Pericom PI7C9X2G303EL PCIe switch, which does not work otherwise.
Tested-by: Mohit Kumar <mohit.kumar@st.com>
Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Marek Vasut <marex@denx.de
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Zhu <Hong-Xing.Zhu@freescale.com>

The cfg_read/write functions are DesignWare-specific.  Add dw_pcie prefix
to avoid collision in global name space.
Tested-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>

The interrupts were cleared after the IRQ handler was called.  This means
that new interrupts that occur after the handler handled the previous IRQ
but before the interrupt is cleared will be missed.
Tested-by: Marek Vasut <marex@denx.de>
Tested-by: Matthias Mann <m.mann@arkona-technologies.de>
Signed-off-by: Harro Haan <hrhaan@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Mohit Kumar <mohit.kumar@st.com>
Cc: Richard Zhu <hong-xing.zhu@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Juergen Beisert <jbe@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Sean Cross <xobs@kosagi.com>

The PCI MSI sysfs code is a mess with kobjects for things that don't really
need to be kobjects.  This patch creates attributes dynamically for the MSI
interrupts instead of using kobjects.

Note, this removes a directory from sysfs.  Old MSI kobjects:

  pci_device
     └── msi_irqs
         └── 40
             └── mode

New MSI attributes:

  pci_device
     └── msi_irqs
         └── 40

As there was only one file "mode" with the kobject model, the interrupt
number is now a file that returns the "mode" of the interrupt (msi vs.
msix).
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>

Previously pcie_device_init() called get_device() if device_register() for
the new pcie_device succeeded, and remove_iter() called put_device() when
removing before unregistering the device.

But device_register() already increments the reference count in
device_add(), so we don't need to do it again here.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

This is required so that we give up the last reference to the device.
Removed the kfree() as put_device will result in release_pcie_device()
being called and hence the container of the device will be kfree'd.

[bhelgaas: fix conflict after my previous cleanup]
Signed-off-by: Levente Kurusa <levex@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

Make the straightline path the normal no-error path.  Check for errors and
return them directly, instead of checking for success and putting the
normal path in an "if" body.

No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

mvebu_pcie_of_match_table is always compiled in.  Hence of_match_ptr is not
required.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

LTSSM shouldn't be set once in assert_core_reset().  Move peripheral reset
just before LTSSM start.
Signed-off-by: Richard Zhu <r65037@freescale.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>

This patch first forces the link into Gen1 mode before starting up the link
and, only after the link is up, start negotiating possible Gen2 mode
operation.  This is because without such sequence, some PCIe switches are
not detected at all.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>

Split the function that waits for the PCIe link to come up from the rest if
the host init function.  We will find this change useful in the subsequent
patch, since this will be called twice then.

No functional change.

[bhelgaas: remove useless "return;"]
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>

Split the PCIe PHY reset from the link up function to make the code a
little more structured.

No functional change.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>

While waiting for the PHY to report the PCIe link is up, we might hit a
situation where the link training is still in progress, while the PHY
already reports the link is up.  Add additional check for this condition.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>

Some boards do not have a PCIe reset GPIO.  To avoid probe failure on these
boards, make the reset GPIO optional as well.

[bhelgaas: whitespace fixes]
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>

* pci/vc:
  PCI: Rename PCI_VC_PORT_REG1/2 to PCI_VC_PORT_CAP1/2
  PCI: Add Virtual Channel to save/restore support
  PCI: Add support for save/restore of extended capabilities
  PCI: Add pci_wait_for_pending() (refactor pci_wait_for_pending_transaction())

* pci/pciehp:
  PCI: pciehp: Move Attention & Power Indicator support tests to accessors
  PCI: pciehp: Use symbolic constants for Slot Control fields
  PCI: pciehp: Use symbolic constants, not hard-coded bitmask
  PCI: pciehp: Simplify "Power Fault Detected" checking/clearing
  PCI: pciehp: Announce slot capabilities (slot #, button, LEDs, etc)
  PCI: pciehp: Make various functions void since they can't fail
  PCI: pciehp: Remove error checks when accessing PCIe Capability
  PCI: pciehp: Drop pciehp_readw()/pciehp_writew() wrappers

* pci/host-tegra:
  PCI: Disable Gen2 for Tegra20 and Tegra30

* pci/host-rcar:
  PCI: rcar: Add runtime PM support
  PCI: rcar: Fix rcar_pci_probe() return value check

* pci/host-mvebu:
  PCI: mvebu: Remove duplicate of_clk_get_by_name() call
  PCI: mvebu: Support a bridge with no IO port window
  PCI: mvebu: Obey bridge PCI_COMMAND_MEM and PCI_COMMAND_IO bits
  PCI: mvebu: Drop writes to bridge Secondary Status register

* pci/host-imx6:
  PCI: imx6: Remove unneeded 'goto err'
  PCI: imx6: Remove unneeded check of platform_get_resource()

* pci/host-designware:
  PCI: designware: Use typical "for" loop idiom
  PCI: designware: Remove redundant call to pci_write_config_word()
  PCI: designware: Fix crash in dw_msi_teardown_irq()

* pci/deletion:
  PCI: Remove from bus_list and release resources in pci_release_dev()
  PCI: Move pci_proc_attach_device() to pci_bus_add_device()
  PCI: Use device_release_driver() in pci_stop_root_bus()
  PCI: Move device_del() from pci_stop_dev() to pci_destroy_dev()

Conflicts:
	drivers/pci/remove.c

* pci/aer:
  PCI/AER: Consolidate HEST error source parsers
  PCI/AER: Ignore non-PCIe AER error sources in aer_hest_parse()
  PCI/AER: Clean up error printing code a bit
  PCI/AER: Add a TLP header print helper

* eisa:
  EISA: Call put_device() if device_register() fails

Previously we removed the pci_dev from the bus_list and released its
resources in pci_destroy_dev().  But that's too early: it's possible to
call pci_destroy_dev() twice for the same device (e.g., via sysfs), and
that will cause an oops when we try to remove it from bus_list the second
time.

We should remove it from the bus_list only when the last reference to the
pci_dev has been released, i.e., in pci_release_dev().

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

4f535093 ("PCI: Put pci_dev in device tree as early as possible")
moved pci_proc_attach_device() from pci_bus_add_device() to
pci_device_add().

This moves it back to pci_bus_add_device(), essentially reverting that
part of 4f535093.  This makes it symmetric with pci_stop_dev(),
where we call pci_proc_detach_device() and pci_remove_sysfs_dev_files()
and set dev->is_added = 0.

[bhelgaas: changelog, create sysfs then attach proc for symmetry]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

To be consistent with 4bff6749 ("PCI: Move device_del() from
pci_stop_dev() to pci_destroy_dev()", this changes pci_stop_root_bus()
to use device_release_driver() instead of device_del().

This also changes pci_remove_root_bus() to use device_unregister()
instead of put_device() so it corresponds with the device_register()
call in pci_create_root_bus().

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>