Commit Graph

3839 Commits

Author SHA1 Message Date
Linus Torvalds 7550cfab3d PCI changes for the v3.16 merge window (part 2):
IOMMU
     - Add DMA alias iterator (Alex Williamson)
     - Add DMA alias quirks for ASMedia, ITE, Tundra bridges (Alex Williamson)
     - Add DMA alias quirks for Marvell, Ricoh devices (Alex Williamson)
     - Add DMA alias quirk for HighPoint devices (Jérôme Carretero)
 
   MSI
     - Fix leak in free_msi_irqs() (Alexei Starovoitov)
 
   Marvell MVEBU
     - Remove unnecessary use of 'conf_lock' spinlock (Andrew Murray)
     - Avoid setting an undefined window size (Jason Gunthorpe)
     - Allow several windows with the same target/attribute (Thomas Petazzoni)
     - Split PCIe BARs into multiple MBus windows when needed (Thomas Petazzoni)
     - Fix off-by-one in the computed size of the mbus windows (Willy Tarreau)
 
   NVIDIA Tegra
     - Use new OF interrupt mapping when possible (Lucas Stach)
 
   Synopsys DesignWare
     - Remove unnecessary use of 'conf_lock' spinlock (Andrew Murray)
     - Use new OF interrupt mapping when possible (Lucas Stach)
     - Split Exynos and i.MX bindings (Lucas Stach)
     - Fix comment for setting number of lanes (Mohit Kumar)
     - Fix iATU programming for cfg1, io and mem viewport (Mohit Kumar)
 
   Miscellaneous
     - EXPORT_SYMBOL cleanup (Ryan Desfosses)
     - Whitespace cleanup (Ryan Desfosses)
     - Merge multi-line quoted strings (Ryan Desfosses)
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Merge tag 'pci-v3.16-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull more PCI updates from Bjorn Helgaas:
 "Here are some more things I'd like to see in v3.16-rc1:

   - DMA alias iterator, part of some work to fix IOMMU issues
   - MVEBU, Tegra, DesignWare changes that I forgot to include before
   - Some whitespace code cleanup

  Details:

  IOMMU
    - Add DMA alias iterator (Alex Williamson)
    - Add DMA alias quirks for ASMedia, ITE, Tundra bridges (Alex Williamson)
    - Add DMA alias quirks for Marvell, Ricoh devices (Alex Williamson)
    - Add DMA alias quirk for HighPoint devices (Jérôme Carretero)

  MSI
    - Fix leak in free_msi_irqs() (Alexei Starovoitov)

  Marvell MVEBU
    - Remove unnecessary use of 'conf_lock' spinlock (Andrew Murray)
    - Avoid setting an undefined window size (Jason Gunthorpe)
    - Allow several windows with the same target/attribute (Thomas Petazzoni)
    - Split PCIe BARs into multiple MBus windows when needed (Thomas Petazzoni)
    - Fix off-by-one in the computed size of the mbus windows (Willy Tarreau)

  NVIDIA Tegra
    - Use new OF interrupt mapping when possible (Lucas Stach)

  Synopsys DesignWare
    - Remove unnecessary use of 'conf_lock' spinlock (Andrew Murray)
    - Use new OF interrupt mapping when possible (Lucas Stach)
    - Split Exynos and i.MX bindings (Lucas Stach)
    - Fix comment for setting number of lanes (Mohit Kumar)
    - Fix iATU programming for cfg1, io and mem viewport (Mohit Kumar)

  Miscellaneous
    - EXPORT_SYMBOL cleanup (Ryan Desfosses)
    - Whitespace cleanup (Ryan Desfosses)
    - Merge multi-line quoted strings (Ryan Desfosses)"

* tag 'pci-v3.16-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (21 commits)
  PCI: Add function 1 DMA alias quirk for HighPoint RocketRaid 642L
  PCI/MSI: Fix memory leak in free_msi_irqs()
  PCI: Merge multi-line quoted strings
  PCI: Whitespace cleanup
  PCI: Move EXPORT_SYMBOL so it immediately follows function/variable
  PCI: Add bridge DMA alias quirk for ITE bridge
  PCI: designware: Split Exynos and i.MX bindings
  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
  PCI: mvebu: Use '%pa' for printing 'phys_addr_t' type
  PCI: mvebu: Remove unnecessary use of 'conf_lock' spinlock
  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
  ...
2014-06-12 13:20:24 -07:00
Linus Torvalds 19c1940fea More ACPI and power management updates for 3.16-rc1
- I didn't remember correctly that the Hans de Goede's ACPI video
    patches actually didn't flip the video.use_native_backlight
    default, although we had discussed that and decided to do that.
    Since I said we would do that in the previous PM+ACPI pull
    request, make that change for real now.
 
  - ACPI bus check notifications for PCI host bridges don't cause
    the bus below the host bridge to be checked for changes as they
    should because of a mistake in the ACPI-based PCI hotplug (ACPIPHP)
    subsystem that forgets to add hotplug contexts to PCI host bridge
    ACPI device objects.  Create hotplug contexts for PCI host bridges
    too as appropriate.
 
  - Revert recent cpufreq commit related to the big.LITTLE cpufreq
    driver that breaks arm64 builds.
 
  - Fix for a regression in the ppc-corenet cpufreq driver introduced
    during the 3.15 cycle and causing the driver to use the remainder
    from do_div instead of the quotient.  From Ed Swarthout.
 
  - Resets triggered by panic activate a BUG_ON() in vmalloc.c on
    systems where the ACPI reset register is located in memory address
    space.  Fix from Randy Wright.
 
  - Fix for a problem with cpufreq governors that decisions made by
    them may be suboptimal due to the fact that deferrable timers are
    used by them for CPU load sampling.  From Srivatsa S Bhat.
 
  - Fix for a problem with the Tegra cpufreq driver where the CPU
    frequency is temporarily switched to a "stable" level that
    is different from both the initial and target frequencies
    during transitions which causes udelay() to expire earlier than
    it should sometimes.  From Viresh Kumar.
 
  - New trace points and rework of some existing trace points for
    system suspend/resume profiling from Todd Brandt.
 
  - Assorted cpufreq fixes and cleanups from Stratos Karafotis and
    Viresh Kumar.
 
  - Copyright notice update for suspend-and-cpuhotplug.txt from
    Srivatsa S Bhat.
 
 /
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Merge tag 'pm+acpi-3.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management updates from Rafael Wysocki:
 "These are fixups on top of the previous PM+ACPI pull request,
  regression fixes (ACPI hotplug, cpufreq ppc-corenet), other bug fixes
  (ACPI reset, cpufreq), new PM trace points for system suspend
  profiling and a copyright notice update.

  Specifics:

   - I didn't remember correctly that the Hans de Goede's ACPI video
     patches actually didn't flip the video.use_native_backlight
     default, although we had discussed that and decided to do that.
     Since I said we would do that in the previous PM+ACPI pull request,
     make that change for real now.

   - ACPI bus check notifications for PCI host bridges don't cause the
     bus below the host bridge to be checked for changes as they should
     because of a mistake in the ACPI-based PCI hotplug (ACPIPHP)
     subsystem that forgets to add hotplug contexts to PCI host bridge
     ACPI device objects.  Create hotplug contexts for PCI host bridges
     too as appropriate.

   - Revert recent cpufreq commit related to the big.LITTLE cpufreq
     driver that breaks arm64 builds.

   - Fix for a regression in the ppc-corenet cpufreq driver introduced
     during the 3.15 cycle and causing the driver to use the remainder
     from do_div instead of the quotient.  From Ed Swarthout.

   - Resets triggered by panic activate a BUG_ON() in vmalloc.c on
     systems where the ACPI reset register is located in memory address
     space.  Fix from Randy Wright.

   - Fix for a problem with cpufreq governors that decisions made by
     them may be suboptimal due to the fact that deferrable timers are
     used by them for CPU load sampling.  From Srivatsa S Bhat.

   - Fix for a problem with the Tegra cpufreq driver where the CPU
     frequency is temporarily switched to a "stable" level that is
     different from both the initial and target frequencies during
     transitions which causes udelay() to expire earlier than it should
     sometimes.  From Viresh Kumar.

   - New trace points and rework of some existing trace points for
     system suspend/resume profiling from Todd Brandt.

   - Assorted cpufreq fixes and cleanups from Stratos Karafotis and
     Viresh Kumar.

   - Copyright notice update for suspend-and-cpuhotplug.txt from
     Srivatsa S Bhat"

* tag 'pm+acpi-3.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / hotplug / PCI: Add hotplug contexts to PCI host bridges
  PM / sleep: trace events for device PM callbacks
  cpufreq: cpufreq-cpu0: remove dependency on THERMAL and REGULATOR
  cpufreq: tegra: update comment for clarity
  cpufreq: intel_pstate: Remove duplicate CPU ID check
  cpufreq: Mark CPU0 driver with CPUFREQ_NEED_INITIAL_FREQ_CHECK flag
  PM / Documentation: Update copyright in suspend-and-cpuhotplug.txt
  cpufreq: governor: remove copy_prev_load from 'struct cpu_dbs_common_info'
  cpufreq: governor: Be friendly towards latency-sensitive bursty workloads
  PM / sleep: trace events for suspend/resume
  cpufreq: ppc-corenet-cpu-freq: do_div use quotient
  Revert "cpufreq: Enable big.LITTLE cpufreq driver on arm64"
  cpufreq: Tegra: implement intermediate frequency callbacks
  cpufreq: add support for intermediate (stable) frequencies
  ACPI / video: Change the default for video.use_native_backlight to 1
  ACPI: Fix bug when ACPI reset register is implemented in system memory
2014-06-12 13:14:19 -07:00
Bjorn Helgaas 38a6148248 Merge branches 'pci/msi', 'pci/iommu' and 'pci/cleanup' into next
* pci/msi:
  PCI/MSI: Fix memory leak in free_msi_irqs()

* pci/iommu:
  PCI: Add function 1 DMA alias quirk for HighPoint RocketRaid 642L
  PCI: Add bridge DMA alias quirk for ITE bridge

* pci/cleanup:
  PCI: Merge multi-line quoted strings
  PCI: Whitespace cleanup
  PCI: Move EXPORT_SYMBOL so it immediately follows function/variable
2014-06-11 14:38:25 -06:00
Jérôme Carretero c2e0fb966a PCI: Add function 1 DMA alias quirk for HighPoint RocketRaid 642L
This device uses function 1 as the PCIe requester ID.

This vendor has similar boards based on the same Marvell 88SE9235 chipset,
but this patch was only tested with the 642L.

Tested on ASUS Sabertooth 990FX (AMD).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=42679
Signed-off-by: Jérôme Carretero <cJ-ko@zougloub.eu>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
2014-06-11 13:45:19 -06:00
Rafael J. Wysocki 882d18a702 ACPI / hotplug / PCI: Add hotplug contexts to PCI host bridges
After relatively recent changes in the ACPI-based PCI hotplug
(ACPIPHP) code, the acpiphp_check_host_bridge() executed for PCI
host bridges via acpi_pci_root_scan_dependent() doesn't do anything
useful, because those bridges do not have hotplug contexts.  That
happens by mistake, so fix it by making acpiphp_enumerate_slots()
add hotplug contexts to PCI host bridges too and modify
acpiphp_remove_slots() to drop those contexts for host bridges
as appropriate.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=76901
Fixes: 2d8b1d566a (ACPI / hotplug / PCI: Get rid of check_sub_bridges())
Reported-and-tested-by: Gavin Guo <gavin.guo@canonical.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-06-11 21:08:49 +02:00
Alexei Starovoitov b701c0b1fe PCI/MSI: Fix memory leak in free_msi_irqs()
free_msi_irqs() is leaking memory, since list_for_each_entry(entry,
&dev->msi_list, list) {...} is never executed, because dev->msi_list is
made empty by the loop just above this one.

Fix it by relying on zero termination of attribute array like
populate_msi_sysfs() does.

Fixes: 1c51b50c29 ("PCI/MSI: Export MSI mode using attributes, not kobjects")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: stable@vger.kernel.org	# v3.14+
2014-06-11 11:13:19 -06:00
Ryan Desfosses 227f064705 PCI: Merge multi-line quoted strings
Merge quoted strings that are broken across lines into a single entity.
The compiler merges them anyway, but checkpatch complains about it, and
merging them makes it easier to grep for strings.

No functional change.

[bhelgaas: changelog, do the same for everything under drivers/pci]
Signed-off-by: Ryan Desfosses <ryan@desfo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-06-10 20:20:42 -06:00
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
Linus Torvalds c5aec4c76a Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Ben Herrenschmidt:
 "Here is the bulk of the powerpc changes for this merge window.  It got
  a bit delayed in part because I wasn't paying attention, and in part
  because I discovered I had a core PCI change without a PCI maintainer
  ack in it.  Bjorn eventually agreed it was ok to merge it though we'll
  probably improve it later and I didn't want to rebase to add his ack.

  There is going to be a bit more next week, essentially fixes that I
  still want to sort through and test.

  The biggest item this time is the support to build the ppc64 LE kernel
  with our new v2 ABI.  We previously supported v2 userspace but the
  kernel itself was a tougher nut to crack.  This is now sorted mostly
  thanks to Anton and Rusty.

  We also have a fairly big series from Cedric that add support for
  64-bit LE zImage boot wrapper.  This was made harder by the fact that
  traditionally our zImage wrapper was always 32-bit, but our new LE
  toolchains don't really support 32-bit anymore (it's somewhat there
  but not really "supported") so we didn't want to rely on it.  This
  meant more churn that just endian fixes.

  This brings some more LE bits as well, such as the ability to run in
  LE mode without a hypervisor (ie. under OPAL firmware) by doing the
  right OPAL call to reinitialize the CPU to take HV interrupts in the
  right mode and the usual pile of endian fixes.

  There's another series from Gavin adding EEH improvements (one day we
  *will* have a release with less than 20 EEH patches, I promise!).

  Another highlight is the support for the "Split core" functionality on
  P8 by Michael.  This allows a P8 core to be split into "sub cores" of
  4 threads which allows the subcores to run different guests under KVM
  (the HW still doesn't support a partition per thread).

  And then the usual misc bits and fixes ..."

[ Further delayed by gmail deciding that BenH is a dirty spammer.
  Google knows.  ]

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (155 commits)
  powerpc/powernv: Add missing include to LPC code
  selftests/powerpc: Test the THP bug we fixed in the previous commit
  powerpc/mm: Check paca psize is up to date for huge mappings
  powerpc/powernv: Pass buffer size to OPAL validate flash call
  powerpc/pseries: hcall functions are exported to modules, need _GLOBAL_TOC()
  powerpc: Exported functions __clear_user and copy_page use r2 so need _GLOBAL_TOC()
  powerpc/powernv: Set memory_block_size_bytes to 256MB
  powerpc: Allow ppc_md platform hook to override memory_block_size_bytes
  powerpc/powernv: Fix endian issues in memory error handling code
  powerpc/eeh: Skip eeh sysfs when eeh is disabled
  powerpc: 64bit sendfile is capped at 2GB
  powerpc/powernv: Provide debugfs access to the LPC bus via OPAL
  powerpc/serial: Use saner flags when creating legacy ports
  powerpc: Add cpu family documentation
  powerpc/xmon: Fix up xmon format strings
  powerpc/powernv: Add calls to support little endian host
  powerpc: Document sysfs DSCR interface
  powerpc: Fix regression of per-CPU DSCR setting
  powerpc: Split __SYSFS_SPRSETUP macro
  arch: powerpc/fadump: Cleaning up inconsistent NULL checks
  ...
2014-06-10 18:54:22 -07:00
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
Alex Williamson 98ca50db1b PCI: Add bridge DMA alias quirk for ITE bridge
The ITE 8892 is a PCIe-to-PCI bridge but doesn't have a PCIe capability.
Quirk it so we can figure out the DMA alias for devices below the bridge,
so they work correctly with an IOMMU.

[bhelgaas: add changelog]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=73551
Reported-by: Ronald <rwarsow@gmx.de>
Tested-by: Ronald <rwarsow@gmx.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-06-09 13:56:04 -06:00
Linus Torvalds d09cc3659d Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull core irq updates from Thomas Gleixner:
 "The irq department delivers:

   - Another tree wide update to get rid of the horrible create_irq
     interface along with its even more horrible variants.  That also
     gets rid of the last leftovers of the initial sparse irq hackery.
     arch/driver specific changes have been either acked or ignored.

   - A fix for the spurious interrupt detection logic with threaded
     interrupts.

   - A new ARM SoC interrupt controller

   - The usual pile of fixes and improvements all over the place"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
  Documentation: brcmstb-l2: Add Broadcom STB Level-2 interrupt controller binding
  irqchip: brcmstb-l2: Add Broadcom Set Top Box Level-2 interrupt controller
  genirq: Improve documentation to match current implementation
  ARM: iop13xx: fix msi support with sparse IRQ
  genirq: Provide !SMP stub for irq_set_affinity_notifier()
  irqchip: armada-370-xp: Move the devicetree binding documentation
  irqchip: gic: Use mask field in GICC_IAR
  genirq: Remove dynamic_irq mess
  ia64: Use irq_init_desc
  genirq: Replace dynamic_irq_init/cleanup
  genirq: Remove irq_reserve_irq[s]
  genirq: Replace reserve_irqs in core code
  s390: Avoid call to irq_reserve_irqs()
  s390: Remove pointless arch_show_interrupts()
  s390: pci: Check return value of alloc_irq_desc() proper
  sh: intc: Remove pointless irq_reserve_irqs() invocation
  x86, irq: Remove pointless irq_reserve_irqs() call
  genirq: Make create/destroy_irq() ia64 private
  tile: Use SPARSE_IRQ
  tile: pci: Use irq_alloc/free_hwirq()
  ...
2014-06-04 15:59:13 -07:00
Linus Torvalds 1aacb90eaa Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next
Pull trivial tree changes from Jiri Kosina:
 "Usual pile of patches from trivial tree that make the world go round"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
  staging: go7007: remove reference to CONFIG_KMOD
  aic7xxx: Remove obsolete preprocessor define
  of: dma: doc fixes
  doc: fix incorrect formula to calculate CommitLimit value
  doc: Note need of bc in the kernel build from 3.10 onwards
  mm: Fix printk typo in dmapool.c
  modpost: Fix comment typo "Modules.symvers"
  Kconfig.debug: Grammar s/addition/additional/
  wimax: Spelling s/than/that/, wording s/destinatary/recipient/
  aic7xxx: Spelling s/termnation/termination/
  arm64: mm: Remove superfluous "the" in comment
  of: Spelling s/anonymouns/anonymous/
  dma: imx-sdma: Spelling s/determnine/determine/
  ath10k: Improve grammar in comments
  ath6kl: Spelling s/determnine/determine/
  of: Improve grammar for of_alias_get_id() documentation
  drm/exynos: Spelling s/contro/control/
  radio-bcm2048.c: fix wrong overflow check
  doc: printk-formats: do not mention casts for u64/s64
  doc: spelling error changes
  ...
2014-06-04 08:50:34 -07:00
Linus Torvalds 776edb5931 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull core locking updates from Ingo Molnar:
 "The main changes in this cycle were:

   - reduced/streamlined smp_mb__*() interface that allows more usecases
     and makes the existing ones less buggy, especially in rarer
     architectures

   - add rwsem implementation comments

   - bump up lockdep limits"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
  rwsem: Add comments to explain the meaning of the rwsem's count field
  lockdep: Increase static allocations
  arch: Mass conversion of smp_mb__*()
  arch,doc: Convert smp_mb__*()
  arch,xtensa: Convert smp_mb__*()
  arch,x86: Convert smp_mb__*()
  arch,tile: Convert smp_mb__*()
  arch,sparc: Convert smp_mb__*()
  arch,sh: Convert smp_mb__*()
  arch,score: Convert smp_mb__*()
  arch,s390: Convert smp_mb__*()
  arch,powerpc: Convert smp_mb__*()
  arch,parisc: Convert smp_mb__*()
  arch,openrisc: Convert smp_mb__*()
  arch,mn10300: Convert smp_mb__*()
  arch,mips: Convert smp_mb__*()
  arch,metag: Convert smp_mb__*()
  arch,m68k: Convert smp_mb__*()
  arch,m32r: Convert smp_mb__*()
  arch,ia64: Convert smp_mb__*()
  ...
2014-06-03 12:57:53 -07:00
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
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
Linus Torvalds 425553209b PCI changes for the v3.16 merge window:
Enumeration
     - Notify driver before and after device reset (Keith Busch)
     - Use reset notification in NVMe (Keith Busch)
 
   NUMA
     - Warn if we have to guess host bridge node information (Myron Stowe)
     - Work around AMD Fam15h BIOSes that fail to provide _PXM (Suravee Suthikulpanit)
     - Clean up and mark early_root_info_init() as deprecated (Suravee Suthikulpanit)
 
   Driver binding
     - Add "driver_override" for force specific binding (Alex Williamson)
     - Fail "new_id" addition for devices we already know about (Bandan Das)
 
   Resource management
     - Support BAR sizes up to 8GB (Nikhil Rao, Alan Cox)
     - Don't move IORESOURCE_PCI_FIXED resources (Bjorn Helgaas)
     - Mark SBx00 HPET BAR as IORESOURCE_PCI_FIXED (Bjorn Helgaas)
     - Fail safely if we can't handle BARs larger than 4GB (Bjorn Helgaas)
     - Reject BAR above 4GB if dma_addr_t is too small (Bjorn Helgaas)
     - Don't convert BAR address to resource if dma_addr_t is too small (Bjorn Helgaas)
     - Don't set BAR to zero if dma_addr_t is too small (Bjorn Helgaas)
     - Don't print anything while decoding is disabled (Bjorn Helgaas)
     - Don't add disabled subtractive decode bus resources (Bjorn Helgaas)
     - Add resource allocation comments (Bjorn Helgaas)
     - Restrict 64-bit prefetchable bridge windows to 64-bit resources (Yinghai Lu)
     - Assign i82875p_edac PCI resources before adding device (Yinghai Lu)
 
   PCI device hotplug
     - Remove unnecessary "dev->bus" test (Bjorn Helgaas)
     - Use PCI_EXP_SLTCAP_PSN define (Bjorn Helgaas)
     - Fix rphahp endianess issues (Laurent Dufour)
     - Acknowledge spurious "cmd completed" event (Rajat Jain)
     - Allow hotplug service drivers to operate in polling mode (Rajat Jain)
     - Fix cpqphp possible NULL dereference (Rickard Strandqvist)
 
   MSI
     - Replace pci_enable_msi_block() by pci_enable_msi_exact() (Alexander Gordeev)
     - Replace pci_enable_msix() by pci_enable_msix_exact() (Alexander Gordeev)
     - Simplify populate_msi_sysfs() (Jan Beulich)
 
   Virtualization
     - Add Intel Patsburg (X79) root port ACS quirk (Alex Williamson)
     - Mark RTL8110SC INTx masking as broken (Alex Williamson)
 
   Generic host bridge driver
     - Add generic PCI host controller driver (Will Deacon)
 
   Freescale i.MX6
     - Use new clock names (Lucas Stach)
     - Drop old IRQ mapping (Lucas Stach)
     - Remove optional (and unused) IRQs (Lucas Stach)
     - Add support for MSI (Lucas Stach)
     - Fix imx6_add_pcie_port() section mismatch warning (Sachin Kamat)
 
   Renesas R-Car
     - Add gen2 device tree support (Ben Dooks)
     - Use new OF interrupt mapping when possible (Lucas Stach)
     - Add PCIe driver (Phil Edworthy)
     - Add PCIe MSI support (Phil Edworthy)
     - Add PCIe device tree bindings (Phil Edworthy)
 
   Samsung Exynos
     - Remove unnecessary OOM messages (Jingoo Han)
     - Fix add_pcie_port() section mismatch warning (Sachin Kamat)
 
   Synopsys DesignWare
     - Make MSI ISR shared IRQ aware (Lucas Stach)
 
   Miscellaneous
     - Check for broken config space aliasing (Alex Williamson)
     - Update email address (Ben Hutchings)
     - Fix Broadcom CNB20LE unintended sign extension (Bjorn Helgaas)
     - Fix incorrect vgaarb conditional in WARN_ON() (Bjorn Helgaas)
     - Remove unnecessary __ref annotations (Bjorn Helgaas)
     - Add arch/x86/kernel/quirks.c to MAINTAINERS PCI file patterns (Bjorn Helgaas)
     - Fix use of uninitialized MPS value (Bjorn Helgaas)
     - Tidy x86/gart messages (Bjorn Helgaas)
     - Fix return value from pci_user_{read,write}_config_*() (Gavin Shan)
     - Turn pcibios_penalize_isa_irq() into a weak function (Hanjun Guo)
     - Remove unused serial device IDs (Jean Delvare)
     - Use designated initialization in PCI_VDEVICE (Mark Rustad)
     - Fix powerpc NULL dereference in pci_root_buses traversal (Mike Qiu)
     - Configure MPS on ARM (Murali Karicheri)
     - Remove unnecessary includes of <linux/init.h> (Paul Gortmaker)
     - Move Open Firmware devspec attribute to PCI common code (Sebastian Ott)
     - Use pdev->dev.groups for attribute creation on s390 (Sebastian Ott)
     - Remove pcibios_add_platform_entries() (Sebastian Ott)
     - Add new ID for Intel GPU "spurious interrupt" quirk (Thomas Jarosch)
     - Rename pci_is_bridge() to pci_has_subordinate() (Yijing Wang)
     - Add and use new pci_is_bridge() interface (Yijing Wang)
     - Make pci_bus_add_device() void (Yijing Wang)
 
   DMA API
     - Clarify physical/bus address distinction in docs (Bjorn Helgaas)
     - Fix typos in docs (Emilio López)
     - Update dma_pool_create ()and dma_pool_alloc() descriptions (Gioh Kim)
     - Change dma_declare_coherent_memory() CPU address to phys_addr_t (Bjorn Helgaas)
     - Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory() (Bjorn Helgaas)
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Merge tag 'pci-v3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci into next

Pull PCI changes from Bjorn Helgaas:
 "Enumeration
    - Notify driver before and after device reset (Keith Busch)
    - Use reset notification in NVMe (Keith Busch)

  NUMA
    - Warn if we have to guess host bridge node information (Myron Stowe)
    - Work around AMD Fam15h BIOSes that fail to provide _PXM (Suravee
      Suthikulpanit)
    - Clean up and mark early_root_info_init() as deprecated (Suravee
      Suthikulpanit)

  Driver binding
    - Add "driver_override" for force specific binding (Alex Williamson)
    - Fail "new_id" addition for devices we already know about (Bandan
      Das)

  Resource management
    - Support BAR sizes up to 8GB (Nikhil Rao, Alan Cox)
    - Don't move IORESOURCE_PCI_FIXED resources (Bjorn Helgaas)
    - Mark SBx00 HPET BAR as IORESOURCE_PCI_FIXED (Bjorn Helgaas)
    - Fail safely if we can't handle BARs larger than 4GB (Bjorn Helgaas)
    - Reject BAR above 4GB if dma_addr_t is too small (Bjorn Helgaas)
    - Don't convert BAR address to resource if dma_addr_t is too small
      (Bjorn Helgaas)
    - Don't set BAR to zero if dma_addr_t is too small (Bjorn Helgaas)
    - Don't print anything while decoding is disabled (Bjorn Helgaas)
    - Don't add disabled subtractive decode bus resources (Bjorn Helgaas)
    - Add resource allocation comments (Bjorn Helgaas)
    - Restrict 64-bit prefetchable bridge windows to 64-bit resources
      (Yinghai Lu)
    - Assign i82875p_edac PCI resources before adding device (Yinghai Lu)

  PCI device hotplug
    - Remove unnecessary "dev->bus" test (Bjorn Helgaas)
    - Use PCI_EXP_SLTCAP_PSN define (Bjorn Helgaas)
    - Fix rphahp endianess issues (Laurent Dufour)
    - Acknowledge spurious "cmd completed" event (Rajat Jain)
    - Allow hotplug service drivers to operate in polling mode (Rajat Jain)
    - Fix cpqphp possible NULL dereference (Rickard Strandqvist)

  MSI
    - Replace pci_enable_msi_block() by pci_enable_msi_exact()
      (Alexander Gordeev)
    - Replace pci_enable_msix() by pci_enable_msix_exact() (Alexander Gordeev)
    - Simplify populate_msi_sysfs() (Jan Beulich)

  Virtualization
    - Add Intel Patsburg (X79) root port ACS quirk (Alex Williamson)
    - Mark RTL8110SC INTx masking as broken (Alex Williamson)

  Generic host bridge driver
    - Add generic PCI host controller driver (Will Deacon)

  Freescale i.MX6
    - Use new clock names (Lucas Stach)
    - Drop old IRQ mapping (Lucas Stach)
    - Remove optional (and unused) IRQs (Lucas Stach)
    - Add support for MSI (Lucas Stach)
    - Fix imx6_add_pcie_port() section mismatch warning (Sachin Kamat)

  Renesas R-Car
    - Add gen2 device tree support (Ben Dooks)
    - Use new OF interrupt mapping when possible (Lucas Stach)
    - Add PCIe driver (Phil Edworthy)
    - Add PCIe MSI support (Phil Edworthy)
    - Add PCIe device tree bindings (Phil Edworthy)

  Samsung Exynos
    - Remove unnecessary OOM messages (Jingoo Han)
    - Fix add_pcie_port() section mismatch warning (Sachin Kamat)

  Synopsys DesignWare
    - Make MSI ISR shared IRQ aware (Lucas Stach)

  Miscellaneous
    - Check for broken config space aliasing (Alex Williamson)
    - Update email address (Ben Hutchings)
    - Fix Broadcom CNB20LE unintended sign extension (Bjorn Helgaas)
    - Fix incorrect vgaarb conditional in WARN_ON() (Bjorn Helgaas)
    - Remove unnecessary __ref annotations (Bjorn Helgaas)
    - Add arch/x86/kernel/quirks.c to MAINTAINERS PCI file patterns
      (Bjorn Helgaas)
    - Fix use of uninitialized MPS value (Bjorn Helgaas)
    - Tidy x86/gart messages (Bjorn Helgaas)
    - Fix return value from pci_user_{read,write}_config_*() (Gavin Shan)
    - Turn pcibios_penalize_isa_irq() into a weak function (Hanjun Guo)
    - Remove unused serial device IDs (Jean Delvare)
    - Use designated initialization in PCI_VDEVICE (Mark Rustad)
    - Fix powerpc NULL dereference in pci_root_buses traversal (Mike Qiu)
    - Configure MPS on ARM (Murali Karicheri)
    - Remove unnecessary includes of <linux/init.h> (Paul Gortmaker)
    - Move Open Firmware devspec attribute to PCI common code (Sebastian Ott)
    - Use pdev->dev.groups for attribute creation on s390 (Sebastian Ott)
    - Remove pcibios_add_platform_entries() (Sebastian Ott)
    - Add new ID for Intel GPU "spurious interrupt" quirk (Thomas Jarosch)
    - Rename pci_is_bridge() to pci_has_subordinate() (Yijing Wang)
    - Add and use new pci_is_bridge() interface (Yijing Wang)
    - Make pci_bus_add_device() void (Yijing Wang)

  DMA API
    - Clarify physical/bus address distinction in docs (Bjorn Helgaas)
    - Fix typos in docs (Emilio López)
    - Update dma_pool_create ()and dma_pool_alloc() descriptions (Gioh Kim)
    - Change dma_declare_coherent_memory() CPU address to phys_addr_t
      (Bjorn Helgaas)
    - Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory()
      (Bjorn Helgaas)"

* tag 'pci-v3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (92 commits)
  MAINTAINERS: Add generic PCI host controller driver
  PCI: generic: Add generic PCI host controller driver
  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
  i82875p_edac: Assign PCI resources before adding device
  ARM/PCI: Call pcie_bus_configure_settings() to set MPS
  PCI: imx6: Fix imx6_add_pcie_port() section mismatch warning
  PCI: Make pci_bus_add_device() void
  PCI: exynos: Fix add_pcie_port() section mismatch warning
  PCI: Introduce new device binding path using pci_dev.driver_override
  PCI: rcar: Add gen2 device tree support
  PCI: cpqphp: Fix possible null pointer dereference
  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: Fix return value from pci_user_{read,write}_config_*()
  PCI: exynos: Remove unnecessary OOM messages
  ...
2014-06-02 12:15:19 -07:00
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 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
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 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 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 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