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Author SHA1 Message Date
Christoph Hellwig
5860acc1a9 x86: remove arch specific dma_supported implementation 
And instead wire it up as method for all the dma_map_ops instances.

Note that this also means the arch specific check will be fully instead
of partially applied in the AMD iommu driver.

Signed-off-by: Christoph Hellwig <hch@lst.de>
 2017-06-28 06:54:46 -07:00
Jean Delvare
f5ab3b70a6 x86/PCI: Simplify Dell DMI B1 quirk 
No need for such convoluted code, when all we need is to call one function
in one specific case.

Tested-by: Narendra K <Narendra.K@dell.com> # DellEMC PowerEdge 1950, R730XD
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2017-06-15 16:35:54 -05:00
Vincent Legoll
2b2154f939 x86/PCI: Fix whitespace in set_bios_x() printk 
Remove the space from "PCI :" to make the message consistent with other PCI
messages.

Signed-off-by: Vincent Legoll <vincent.legoll@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2017-06-13 11:44:23 -05:00
Linus Torvalds
857f864014 pci-v4.12-changes 
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Merge tag 'pci-v4.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:

 - add framework for supporting PCIe devices in Endpoint mode (Kishon
   Vijay Abraham I)

 - use non-postable PCI config space mappings when possible (Lorenzo
   Pieralisi)

 - clean up and unify mmap of PCI BARs (David Woodhouse)

 - export and unify Function Level Reset support (Christoph Hellwig)

 - avoid FLR for Intel 82579 NICs (Sasha Neftin)

 - add pci_request_irq() and pci_free_irq() helpers (Christoph Hellwig)

 - short-circuit config access failures for disconnected devices (Keith
   Busch)

 - remove D3 sleep delay when possible (Adrian Hunter)

 - freeze PME scan before suspending devices (Lukas Wunner)

 - stop disabling MSI/MSI-X in pci_device_shutdown() (Prarit Bhargava)

 - disable boot interrupt quirk for ASUS M2N-LR (Stefan Assmann)

 - add arch-specific alignment control to improve device passthrough by
   avoiding multiple BARs in a page (Yongji Xie)

 - add sysfs sriov_drivers_autoprobe to control VF driver binding
   (Bodong Wang)

 - allow slots below PCI-to-PCIe "reverse bridges" (Bjorn Helgaas)

 - fix crashes when unbinding host controllers that don't support
   removal (Brian Norris)

 - add driver for MicroSemi Switchtec management interface (Logan
   Gunthorpe)

 - add driver for Faraday Technology FTPCI100 host bridge (Linus
   Walleij)

 - add i.MX7D support (Andrey Smirnov)

 - use generic MSI support for Aardvark (Thomas Petazzoni)

 - make Rockchip driver modular (Brian Norris)

 - advertise 128-byte Read Completion Boundary support for Rockchip
   (Shawn Lin)

 - advertise PCI_EXP_LNKSTA_SLC for Rockchip root port (Shawn Lin)

 - convert atomic_t to refcount_t in HV driver (Elena Reshetova)

 - add CPU IRQ affinity in HV driver (K. Y. Srinivasan)

 - fix PCI bus removal in HV driver (Long Li)

 - add support for ThunderX2 DMA alias topology (Jayachandran C)

 - add ThunderX pass2.x 2nd node MCFG quirk (Tomasz Nowicki)

 - add ITE 8893 bridge DMA alias quirk (Jarod Wilson)

 - restrict Cavium ACS quirk only to CN81xx/CN83xx/CN88xx devices
   (Manish Jaggi)

* tag 'pci-v4.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (146 commits)
  PCI: Don't allow unbinding host controllers that aren't prepared
  ARM: DRA7: clockdomain: Change the CLKTRCTRL of CM_PCIE_CLKSTCTRL to SW_WKUP
  MAINTAINERS: Add PCI Endpoint maintainer
  Documentation: PCI: Add userguide for PCI endpoint test function
  tools: PCI: Add sample test script to invoke pcitest
  tools: PCI: Add a userspace tool to test PCI endpoint
  Documentation: misc-devices: Add Documentation for pci-endpoint-test driver
  misc: Add host side PCI driver for PCI test function device
  PCI: Add device IDs for DRA74x and DRA72x
  dt-bindings: PCI: dra7xx: Add DT bindings to enable unaligned access
  PCI: dwc: dra7xx: Workaround for errata id i870
  dt-bindings: PCI: dra7xx: Add DT bindings for PCI dra7xx EP mode
  PCI: dwc: dra7xx: Add EP mode support
  PCI: dwc: dra7xx: Facilitate wrapper and MSI interrupts to be enabled independently
  dt-bindings: PCI: Add DT bindings for PCI designware EP mode
  PCI: dwc: designware: Add EP mode support
  Documentation: PCI: Add binding documentation for pci-test endpoint function
  ixgbe: Use pcie_flr() instead of duplicating it
  IB/hfi1: Use pcie_flr() instead of duplicating it
  PCI: imx6: Fix spelling mistake: "contol" -> "control"
  ...
 2017-05-08 19:03:25 -07:00
Laura Abbott
d11636511e x86: use set_memory.h header 
set_memory_* functions have moved to set_memory.h.  Switch to this
explicitly.

Link: http://lkml.kernel.org/r/1488920133-27229-6-git-send-email-labbott@redhat.com
Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2017-05-08 17:15:13 -07:00
Boris Ostrovsky
84d582d236 xen: Revert commits da72ff5bfc and 72a9b18629 
Recent discussion (http://marc.info/?l=xen-devel&m=149192184523741)
established that commit 72a9b18629 ("xen: Remove event channel
notification through Xen PCI platform device") (and thus commit
da72ff5bfc ("partially revert "xen: Remove event channel
notification through Xen PCI platform device"")) are unnecessary and,
in fact, prevent HVM guests from booting on Xen releases prior to 4.0

Therefore we revert both of those commits.

The summary of that discussion is below:

  Here is the brief summary of the current situation:

  Before the offending commit (72a9b18629):

  1) INTx does not work because of the reset_watches path.
  2) The reset_watches path is only taken if you have Xen > 4.0
  3) The Linux Kernel by default will use vector inject if the hypervisor
     support. So even INTx does not work no body running the kernel with
     Xen > 4.0 would notice. Unless he explicitly disabled this feature
     either in the kernel or in Xen (and this can only be disabled by
     modifying the code, not user-supported way to do it).

  After the offending commit (+ partial revert):

  1) INTx is no longer support for HVM (only for PV guests).
  2) Any HVM guest The kernel will not boot on Xen < 4.0 which does
     not have vector injection support. Since the only other mode
     supported is INTx which.

  So based on this summary, I think before commit (72a9b18629) we were
  in much better position from a user point of view.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
 2017-05-02 11:18:05 +02:00
Linus Torvalds
16b76293c5 Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 boot updates from Ingo Molnar:
 "The biggest changes in this cycle were:

   - reworking of the e820 code: separate in-kernel and boot-ABI data
     structures and apply a whole range of cleanups to the kernel side.

     No change in functionality.

   - enable KASLR by default: it's used by all major distros and it's
     out of the experimental stage as well.

   - ... misc fixes and cleanups"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (63 commits)
  x86/KASLR: Fix kexec kernel boot crash when KASLR randomization fails
  x86/reboot: Turn off KVM when halting a CPU
  x86/boot: Fix BSS corruption/overwrite bug in early x86 kernel startup
  x86: Enable KASLR by default
  boot/param: Move next_arg() function to lib/cmdline.c for later reuse
  x86/boot: Fix Sparse warning by including required header file
  x86/boot/64: Rename start_cpu()
  x86/xen: Update e820 table handling to the new core x86 E820 code
  x86/boot: Fix pr_debug() API braindamage
  xen, x86/headers: Add <linux/device.h> dependency to <asm/xen/page.h>
  x86/boot/e820: Simplify e820__update_table()
  x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures
  x86/boot/e820: Fix and clean up e820_type switch() statements
  x86/boot/e820: Rename the remaining E820 APIs to the e820__*() prefix
  x86/boot/e820: Remove unnecessary #include's
  x86/boot/e820: Rename e820_mark_nosave_regions() to e820__register_nosave_regions()
  x86/boot/e820: Rename e820_reserve_resources*() to e820__reserve_resources*()
  x86/boot/e820: Use bool in query APIs
  x86/boot/e820: Document e820__reserve_setup_data()
  x86/boot/e820: Clean up __e820__update_table() et al
  ...
 2017-05-01 20:51:12 -07:00
David Woodhouse
5c2d5ce2ab x86/PCI: Use generic pci_mmap_resource_range() 
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2017-04-20 08:47:47 -05:00
David Woodhouse
f66e225828 PCI: Add BAR index argument to pci_mmap_page_range() 
In all cases we know which BAR it is.  Passing it in means that arch code
(or generic code; watch this space) won't have to go looking for it again.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2017-04-20 08:47:47 -05:00
Linus Torvalds
cb2113cb98 features and fixes for 4.11 rc1 
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Merge tag 'for-linus-4.11-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fix and cleanup from Juergen Gross:
 "This contains one fix for MSIX handling under Xen and a trivial
  cleanup patch"

* tag 'for-linus-4.11-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xenbus: Remove duplicate inclusion of linux/init.h
  xen: do not re-use pirq number cached in pci device msi msg data
 2017-03-09 12:23:30 -08:00
Rui Wang
153654dbe5 x86/PCI: Implement pcibios_release_device to release IRQ from IOAPIC 
The revert of 991de2e590 ("PCI, x86: Implement pcibios_alloc_irq()
and pcibios_free_irq()") causes a problem for IOAPIC hotplug. The
problem is that IRQs are allocated and freed in pci_enable_device()
and pci_disable_device(). But there are some drivers which don't call
pci_disable_device(), and they have good reasons not calling it, so
if they're using IOAPIC their IRQs won't have a chance to be released
from the IOAPIC. When this happens IOAPIC hot-removal fails with a
kernel stack dump and an error message like this:

  [149335.697989] pin16 on IOAPIC2 is still in use.

It turns out that we can fix it in a different way without moving IRQ
allocation into pcibios_alloc_irq(), thus avoiding the regression of
991de2e590. We can keep the allocation and freeing of IRQs as is
within pci_enable_device()/pci_disable_device(), without breaking any
previous assumption of the rest of the system, keeping compatibility
with both the legacy and the modern drivers. We can accomplish this by
implementing the existing __weak hook of pcibios_release_device() thus
when a pci device is about to be deleted we get notified in the hook
and take the chance to release its IRQ, if any, from the IOAPIC.

Implement pcibios_release_device() for x86 to release any IRQ not released
by the driver.

Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Cc: tony.luck@intel.com
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: fengguang.wu@intel.com
Cc: helgaas@kernel.org
Cc: kbuild-all@01.org
Cc: bhelgaas@google.com
Link: http://lkml.kernel.org/r/1488288869-31290-2-git-send-email-rui.y.wang@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2017-03-01 10:51:41 +01:00
Ingo Molnar
0871d5a66d Merge branch 'linus' into WIP.x86/boot, to fix up conflicts and to pick up updates 
Conflicts:
	arch/x86/xen/setup.c

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-03-01 09:02:26 +01:00
Linus Torvalds
ac1820fb28 This is a tree wide change and has been kept separate for that reason. 
Bart Van Assche noted that the ib DMA mapping code was significantly
 similar enough to the core DMA mapping code that with a few changes
 it was possible to remove the IB DMA mapping code entirely and
 switch the RDMA stack to use the core DMA mapping code.  This resulted
 in a nice set of cleanups, but touched the entire tree.  This branch
 will be submitted separately to Linus at the end of the merge window
 as per normal practice for tree wide changes like this.
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Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma DMA mapping updates from Doug Ledford:
 "Drop IB DMA mapping code and use core DMA code instead.

  Bart Van Assche noted that the ib DMA mapping code was significantly
  similar enough to the core DMA mapping code that with a few changes it
  was possible to remove the IB DMA mapping code entirely and switch the
  RDMA stack to use the core DMA mapping code.

  This resulted in a nice set of cleanups, but touched the entire tree
  and has been kept separate for that reason."

* tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits)
  IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it
  IB/core: Remove ib_device.dma_device
  nvme-rdma: Switch from dma_device to dev.parent
  RDS: net: Switch from dma_device to dev.parent
  IB/srpt: Modify a debug statement
  IB/srp: Switch from dma_device to dev.parent
  IB/iser: Switch from dma_device to dev.parent
  IB/IPoIB: Switch from dma_device to dev.parent
  IB/rxe: Switch from dma_device to dev.parent
  IB/vmw_pvrdma: Switch from dma_device to dev.parent
  IB/usnic: Switch from dma_device to dev.parent
  IB/qib: Switch from dma_device to dev.parent
  IB/qedr: Switch from dma_device to dev.parent
  IB/ocrdma: Switch from dma_device to dev.parent
  IB/nes: Remove a superfluous assignment statement
  IB/mthca: Switch from dma_device to dev.parent
  IB/mlx5: Switch from dma_device to dev.parent
  IB/mlx4: Switch from dma_device to dev.parent
  IB/i40iw: Remove a superfluous assignment statement
  IB/hns: Switch from dma_device to dev.parent
  ...
 2017-02-25 13:45:43 -08:00
Dan Streetman
c74fd80f2f xen: do not re-use pirq number cached in pci device msi msg data 
Revert the main part of commit:
af42b8d12f ("xen: fix MSI setup and teardown for PV on HVM guests")

That commit introduced reading the pci device's msi message data to see
if a pirq was previously configured for the device's msi/msix, and re-use
that pirq.  At the time, that was the correct behavior.  However, a
later change to Qemu caused it to call into the Xen hypervisor to unmap
all pirqs for a pci device, when the pci device disables its MSI/MSIX
vectors; specifically the Qemu commit:
c976437c7dba9c7444fb41df45468968aaa326ad
("qemu-xen: free all the pirqs for msi/msix when driver unload")

Once Qemu added this pirq unmapping, it was no longer correct for the
kernel to re-use the pirq number cached in the pci device msi message
data.  All Qemu releases since 2.1.0 contain the patch that unmaps the
pirqs when the pci device disables its MSI/MSIX vectors.

This bug is causing failures to initialize multiple NVMe controllers
under Xen, because the NVMe driver sets up a single MSIX vector for
each controller (concurrently), and then after using that to talk to
the controller for some configuration data, it disables the single MSIX
vector and re-configures all the MSIX vectors it needs.  So the MSIX
setup code tries to re-use the cached pirq from the first vector
for each controller, but the hypervisor has already given away that
pirq to another controller, and its initialization fails.

This is discussed in more detail at:
https://lists.xen.org/archives/html/xen-devel/2017-01/msg00447.html

Fixes: af42b8d12f ("xen: fix MSI setup and teardown for PV on HVM guests")
Signed-off-by: Dan Streetman <dan.streetman@canonical.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
 2017-02-22 10:10:46 -05:00
Ingo Molnar
1506c8dc94 x86/boot/e820: Rename e820_reserve_resources*() to e820__reserve_resources*() 
Also do some minor cleanups.

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-28 22:55:25 +01:00
Ingo Molnar
81b3e090fa x86/boot/e820: Use bool in query APIs 
Change e820__mapped_any() and e820__mapped_all()'s return type and
e820__range_remove()'s check_type parameter to bool.

Propagate it into arch/x86/pci/mmconfig-shared.c as this change
affects a function signature there too.

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-28 22:55:25 +01:00
Ingo Molnar
09821ff1d5 x86/boot/e820: Prefix the E820_* type names with "E820_TYPE_" 
So there's a number of constants that start with "E820" but which
are not types - these create a confusing mixture when seen together
with 'enum e820_type' values:

	E820MAP
	E820NR
	E820_X_MAX
	E820MAX

To better differentiate the 'enum e820_type' values prefix them
with E820_TYPE_.

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-28 22:55:22 +01:00
Ingo Molnar
3bce64f019 x86/boot/e820: Rename e820_any_mapped()/e820_all_mapped() to e820__mapped_any()/e820__mapped_all() 
The 'any' and 'all' are modified to the 'mapped' concept, so move them last in the name.

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-28 14:42:31 +01:00
Ingo Molnar
5520b7e7d2 x86/boot/e820: Remove spurious asm/e820/api.h inclusions 
A commonly used lowlevel x86 header, asm/pgtable.h, includes asm/e820/api.h
spuriously, without making direct use of it.

Removing it is not simple: over the years various .c code learned to rely
on this indirect inclusion.

Remove the unnecessary include - this should speed up the kernel build a bit,
as a large header is not included anymore in totally unrelated code.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-28 09:31:14 +01:00
Ingo Molnar
66441bd3cf x86/boot/e820: Move asm/e820.h to asm/e820/api.h 
In line with asm/e820/types.h, move the e820 API declarations to
asm/e820/api.h and update all usage sites.

This is just a mechanical, obviously correct move & replace patch,
there will be subsequent changes to clean up the code and to make
better use of the new header organization.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-01-28 09:31:13 +01:00
Bart Van Assche
5657933dbb treewide: Move dma_ops from struct dev_archdata into struct device 
Some but not all architectures provide set_dma_ops(). Move dma_ops
from struct dev_archdata into struct device such that it becomes
possible on all architectures to configure dma_ops per device.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
 2017-01-24 12:23:35 -05:00
Bart Van Assche
5299709d0a treewide: Constify most dma_map_ops structures 
Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:

git grep -l 'struct dma_map_ops' |
  xargs -d\\n sed -i \
    -e 's/struct dma_map_ops/const struct dma_map_ops/g' \
    -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
    -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
    -e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
       -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
       -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
    drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
 2017-01-24 12:23:35 -05:00
Bjorn Helgaas
89e9f7bcd8 x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F 
Martin reported that the Supermicro X8DTH-i/6/iF/6F advertises incorrect
host bridge windows via _CRS:

  pci_root PNP0A08:00: host bridge window [io  0xf000-0xffff]
  pci_root PNP0A08:01: host bridge window [io  0xf000-0xffff]

Both bridges advertise the 0xf000-0xffff window, which cannot be correct.

Work around this by ignoring _CRS on this system.  The downside is that we
may not assign resources correctly to hot-added PCI devices (if they are
possible on this system).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=42606
Reported-by: Martin Burnicki <martin.burnicki@meinberg.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
 2017-01-11 09:11:15 -06:00
Linus Torvalds
aa3ecf388a xen: features and fixes for 4.10 rc0 
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Merge tag 'for-linus-4.10-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:
 "Xen features and fixes for 4.10

  These are some fixes, a move of some arm related headers to share them
  between arm and arm64 and a series introducing a helper to make code
  more readable.

  The most notable change is David stepping down as maintainer of the
  Xen hypervisor interface. This results in me sending you the pull
  requests for Xen related code from now on"

* tag 'for-linus-4.10-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (29 commits)
  xen/balloon: Only mark a page as managed when it is released
  xenbus: fix deadlock on writes to /proc/xen/xenbus
  xen/scsifront: don't request a slot on the ring until request is ready
  xen/x86: Increase xen_e820_map to E820_X_MAX possible entries
  x86: Make E820_X_MAX unconditionally larger than E820MAX
  xen/pci: Bubble up error and fix description.
  xen: xenbus: set error code on failure
  xen: set error code on failures
  arm/xen: Use alloc_percpu rather than __alloc_percpu
  arm/arm64: xen: Move shared architecture headers to include/xen/arm
  xen/events: use xen_vcpu_id mapping for EVTCHNOP_status
  xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing
  xen-scsifront: Add a missing call to kfree
  MAINTAINERS: update XEN HYPERVISOR INTERFACE
  xenfs: Use proc_create_mount_point() to create /proc/xen
  xen-platform: use builtin_pci_driver
  xen-netback: fix error handling output
  xen: make use of xenbus_read_unsigned() in xenbus
  xen: make use of xenbus_read_unsigned() in xen-pciback
  xen: make use of xenbus_read_unsigned() in xen-fbfront
  ...
 2016-12-13 16:07:55 -08:00
Konrad Rzeszutek Wilk
577f79e411 xen/pci: Bubble up error and fix description. 
The function is never called under PV guests, and only shows up
when MSI (or MSI-X) cannot be allocated. Convert the message
to include the error value.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
 2016-12-08 07:54:04 +01:00
Sebastian Andrzej Siewior
c8b877a5e5 x86/pci/amd-bus: Convert to hotplug state machine 
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

The smp_call_function_single() is dropped because the ONLINE callback is
invoked on the target CPU since commit 1cf4f629d9 ("cpu/hotplug: Move
online calls to hotplugged cpu"). smp_call_function_single() invokes the
invoked function with interrupts disabled, but this calling convention is
not preserved as the MSR is not modified by anything else than this code.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Cc: rt@linuxtronix.de
Link: http://lkml.kernel.org/r/20161117183541.8588-21-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2016-11-22 23:34:43 +01:00
Linus Torvalds
e6e3d8f8f4 PCI changes for the v4.9 merge window: 
Enumeration
     microblaze: Add multidomain support for procfs (Bharat Kumar Gogada)
 
   Resource management
     Ignore requested alignment for PROBE_ONLY and fixed resources (Yongji Xie)
     Ignore requested alignment for VF BARs (Yongji Xie)
 
   PCI device hotplug
     Make core explicitly non-modular (Paul Gortmaker)
 
   PCIe native device hotplug
     Rename pcie_isr() locals for clarity (Bjorn Helgaas)
     Return IRQ_NONE when we can't read interrupt status (Bjorn Helgaas)
     Remove unnecessary guard (Bjorn Helgaas)
     Clean up dmesg "Slot(%s)" messages (Bjorn Helgaas)
     Remove useless pciehp_get_latch_status() calls (Bjorn Helgaas)
     Clear attention LED on device add (Keith Busch)
     Allow exclusive userspace control of indicators (Keith Busch)
     Process all hotplug events before looking for new ones (Mayurkumar Patel)
     Don't re-read Slot Status when queuing hotplug event (Mayurkumar Patel)
     Don't re-read Slot Status when handling surprise event (Mayurkumar Patel)
     Make explicitly non-modular (Paul Gortmaker)
 
   Power management
     Afford direct-complete to devices with non-standard PM (Lukas Wunner)
     Query platform firmware for device power state (Lukas Wunner)
     Recognize D3cold in pci_update_current_state() (Lukas Wunner)
     Avoid unnecessary resume after direct-complete (Lukas Wunner)
     Make explicitly non-modular (Paul Gortmaker)
 
   Virtualization
     Mark Atheros AR9580 to avoid bus reset (Maik Broemme)
     Check for pci_setup_device() failure in pci_iov_add_virtfn() (Po Liu)
 
   MSI
     Enable PCI_MSI_IRQ_DOMAIN support for ARC (Joao Pinto)
 
   AER
     Remove aerdriver.nosourceid kernel parameter (Bjorn Helgaas)
     Remove aerdriver.forceload kernel parameter (Bjorn Helgaas)
     Fix aer_probe() kernel-doc comment (Cao jin)
     Add bus flag to skip source ID matching (Jon Derrick)
     Avoid memory allocation in interrupt handling path (Jon Derrick)
     Cache capability position (Keith Busch)
     Make explicitly non-modular (Paul Gortmaker)
     Remove duplicate AER severity translation (Tyler Baicar)
     Send correct severity to calculate AER severity (Tyler Baicar)
 
   Precision Time Measurement
     Add Precision Time Measurement (PTM) support (Jonathan Yong)
     Add PTM clock granularity information (Bjorn Helgaas)
     Add pci_enable_ptm() for drivers to enable PTM on endpoints (Bjorn Helgaas)
 
   Generic host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Make explicitly non-modular (Paul Gortmaker)
 
   Altera host bridge driver
     Remove redundant platform_get_resource() return value check (Bjorn Helgaas)
     Poll for link training status after retraining the link (Ley Foon Tan)
     Rework config accessors for use without a struct pci_bus (Ley Foon Tan)
     Move retrain from fixup to altera_pcie_host_init() (Ley Foon Tan)
     Make MSI explicitly non-modular (Paul Gortmaker)
     Make explicitly non-modular (Paul Gortmaker)
     Relax device number checking to allow SR-IOV (Po Liu)
 
   ARM Versatile host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
 
   Axis ARTPEC-6 host bridge driver
     Drop __init from artpec6_add_pcie_port() (Niklas Cassel)
 
   Freescale i.MX6 host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   Intel VMD host bridge driver
     Add quirk for AER to ignore source ID (Jon Derrick)
     Allocate IRQ lists with correct MSI-X count (Jon Derrick)
     Convert to use pci_alloc_irq_vectors() API (Jon Derrick)
     Eliminate vmd_vector member from list type (Jon Derrick)
     Eliminate index member from IRQ list (Jon Derrick)
     Synchronize with RCU freeing MSI IRQ descs (Keith Busch)
     Request userspace control of PCIe hotplug indicators (Keith Busch)
     Move VMD driver to drivers/pci/host (Keith Busch)
 
   Marvell Aardvark host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Remove redundant dev_err call in advk_pcie_probe() (Wei Yongjun)
 
   Microsoft Hyper-V host bridge driver
     Use zero-length array in struct pci_packet (Dexuan Cui)
     Use pci_function_description[0] in struct definitions (Dexuan Cui)
     Remove the unused 'wrk' in struct hv_pcibus_device (Dexuan Cui)
     Handle vmbus_sendpacket() failure in hv_compose_msi_msg() (Dexuan Cui)
     Handle hv_pci_generic_compl() error case (Dexuan Cui)
     Use list_move_tail() instead of list_del() + list_add_tail() (Wei Yongjun)
 
   NVIDIA Tegra host bridge driver
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Remove redundant _data suffix (Thierry Reding)
     Use of_device_get_match_data() (Thierry Reding)
 
   Qualcomm host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   Renesas R-Car host bridge driver
     Consolidate register space lookup and ioremap (Bjorn Helgaas)
     Don't disable/unprepare clocks on prepare/enable failure (Geert Uytterhoeven)
     Add multi-MSI support (Grigory Kletsko)
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Fix some checkpatch warnings (Sergei Shtylyov)
     Try increasing PCIe link speed to 5 GT/s at boot (Sergei Shtylyov)
 
   Rockchip host bridge driver
     Add DT bindings for Rockchip PCIe controller (Shawn Lin)
     Add Rockchip PCIe controller support (Shawn Lin)
     Improve the deassert sequence of four reset pins (Shawn Lin)
     Fix wrong transmitted FTS count (Shawn Lin)
     Increase the Max Credit update interval (Rajat Jain)
 
   Samsung Exynos host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   ST Microelectronics SPEAr13xx host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   Synopsys DesignWare host bridge driver
     Return data directly from dw_pcie_readl_rc() (Bjorn Helgaas)
     Exchange viewport of `MEMORYs' and `CFGs/IOs' (Dong Bo)
     Check LTSSM training bit before deciding link is up (Jisheng Zhang)
     Move link wait definitions to .c file (Joao Pinto)
     Wait for iATU enable (Joao Pinto)
     Add iATU Unroll feature (Joao Pinto)
     Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
     Make explicitly non-modular (Paul Gortmaker)
     Relax device number checking to allow SR-IOV (Po Liu)
     Keep viewport fixed for IO transaction if num_viewport > 2 (Pratyush Anand)
     Remove redundant platform_get_resource() return value check (Wei Yongjun)
 
   TI DRA7xx host bridge driver
     Make explicitly non-modular (Paul Gortmaker)
 
   TI Keystone host bridge driver
     Propagate request_irq() failure (Wei Yongjun)
 
   Xilinx AXI host bridge driver
     Keep both legacy and MSI interrupt domain references (Bharat Kumar Gogada)
     Clear interrupt register for invalid interrupt (Bharat Kumar Gogada)
     Clear correct MSI set bit (Bharat Kumar Gogada)
     Dispose of MSI virtual IRQ (Bharat Kumar Gogada)
     Make explicitly non-modular (Paul Gortmaker)
     Relax device number checking to allow SR-IOV (Po Liu)
 
   Xilinx NWL host bridge driver
     Expand error logging (Bharat Kumar Gogada)
     Enable all MSI interrupts using MSI mask (Bharat Kumar Gogada)
     Make explicitly non-modular (Paul Gortmaker)
 
   Miscellaneous
     Drop CONFIG_KEXEC_CORE ifdeffery (Lukas Wunner)
     portdrv: Make explicitly non-modular (Paul Gortmaker)
     Make DPC explicitly non-modular (Paul Gortmaker)
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Merge tag 'pci-v4.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Summary of PCI changes for the v4.9 merge window:

  Enumeration:
   - microblaze: Add multidomain support for procfs (Bharat Kumar Gogada)

  Resource management:
   - Ignore requested alignment for PROBE_ONLY and fixed resources (Yongji Xie)
   - Ignore requested alignment for VF BARs (Yongji Xie)

  PCI device hotplug:
   - Make core explicitly non-modular (Paul Gortmaker)

  PCIe native device hotplug:
   - Rename pcie_isr() locals for clarity (Bjorn Helgaas)
   - Return IRQ_NONE when we can't read interrupt status (Bjorn Helgaas)
   - Remove unnecessary guard (Bjorn Helgaas)
   - Clean up dmesg "Slot(%s)" messages (Bjorn Helgaas)
   - Remove useless pciehp_get_latch_status() calls (Bjorn Helgaas)
   - Clear attention LED on device add (Keith Busch)
   - Allow exclusive userspace control of indicators (Keith Busch)
   - Process all hotplug events before looking for new ones (Mayurkumar Patel)
   - Don't re-read Slot Status when queuing hotplug event (Mayurkumar Patel)
   - Don't re-read Slot Status when handling surprise event (Mayurkumar Patel)
   - Make explicitly non-modular (Paul Gortmaker)

  Power management:
   - Afford direct-complete to devices with non-standard PM (Lukas Wunner)
   - Query platform firmware for device power state (Lukas Wunner)
   - Recognize D3cold in pci_update_current_state() (Lukas Wunner)
   - Avoid unnecessary resume after direct-complete (Lukas Wunner)
   - Make explicitly non-modular (Paul Gortmaker)

  Virtualization:
   - Mark Atheros AR9580 to avoid bus reset (Maik Broemme)
   - Check for pci_setup_device() failure in pci_iov_add_virtfn() (Po Liu)

  MSI:
   - Enable PCI_MSI_IRQ_DOMAIN support for ARC (Joao Pinto)

  AER:
   - Remove aerdriver.nosourceid kernel parameter (Bjorn Helgaas)
   - Remove aerdriver.forceload kernel parameter (Bjorn Helgaas)
   - Fix aer_probe() kernel-doc comment (Cao jin)
   - Add bus flag to skip source ID matching (Jon Derrick)
   - Avoid memory allocation in interrupt handling path (Jon Derrick)
   - Cache capability position (Keith Busch)
   - Make explicitly non-modular (Paul Gortmaker)
   - Remove duplicate AER severity translation (Tyler Baicar)
   - Send correct severity to calculate AER severity (Tyler Baicar)

  Precision Time Measurement:
   - Add Precision Time Measurement (PTM) support (Jonathan Yong)
   - Add PTM clock granularity information (Bjorn Helgaas)
   - Add pci_enable_ptm() for drivers to enable PTM on endpoints (Bjorn Helgaas)

  Generic host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Make explicitly non-modular (Paul Gortmaker)

  Altera host bridge driver:
   - Remove redundant platform_get_resource() return value check (Bjorn Helgaas)
   - Poll for link training status after retraining the link (Ley Foon Tan)
   - Rework config accessors for use without a struct pci_bus (Ley Foon Tan)
   - Move retrain from fixup to altera_pcie_host_init() (Ley Foon Tan)
   - Make MSI explicitly non-modular (Paul Gortmaker)
   - Make explicitly non-modular (Paul Gortmaker)
   - Relax device number checking to allow SR-IOV (Po Liu)

  ARM Versatile host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)

  Axis ARTPEC-6 host bridge driver:
   - Drop __init from artpec6_add_pcie_port() (Niklas Cassel)

  Freescale i.MX6 host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  Intel VMD host bridge driver:
   - Add quirk for AER to ignore source ID (Jon Derrick)
   - Allocate IRQ lists with correct MSI-X count (Jon Derrick)
   - Convert to use pci_alloc_irq_vectors() API (Jon Derrick)
   - Eliminate vmd_vector member from list type (Jon Derrick)
   - Eliminate index member from IRQ list (Jon Derrick)
   - Synchronize with RCU freeing MSI IRQ descs (Keith Busch)
   - Request userspace control of PCIe hotplug indicators (Keith Busch)
   - Move VMD driver to drivers/pci/host (Keith Busch)

  Marvell Aardvark host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Remove redundant dev_err call in advk_pcie_probe() (Wei Yongjun)

  Microsoft Hyper-V host bridge driver:
   - Use zero-length array in struct pci_packet (Dexuan Cui)
   - Use pci_function_description[0] in struct definitions (Dexuan Cui)
   - Remove the unused 'wrk' in struct hv_pcibus_device (Dexuan Cui)
   - Handle vmbus_sendpacket() failure in hv_compose_msi_msg() (Dexuan Cui)
   - Handle hv_pci_generic_compl() error case (Dexuan Cui)
   - Use list_move_tail() instead of list_del() + list_add_tail() (Wei Yongjun)

  NVIDIA Tegra host bridge driver:
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Remove redundant _data suffix (Thierry Reding)
   - Use of_device_get_match_data() (Thierry Reding)

  Qualcomm host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  Renesas R-Car host bridge driver:
   - Consolidate register space lookup and ioremap (Bjorn Helgaas)
   - Don't disable/unprepare clocks on prepare/enable failure (Geert Uytterhoeven)
   - Add multi-MSI support (Grigory Kletsko)
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Fix some checkpatch warnings (Sergei Shtylyov)
   - Try increasing PCIe link speed to 5 GT/s at boot (Sergei Shtylyov)

  Rockchip host bridge driver:
   - Add DT bindings for Rockchip PCIe controller (Shawn Lin)
   - Add Rockchip PCIe controller support (Shawn Lin)
   - Improve the deassert sequence of four reset pins (Shawn Lin)
   - Fix wrong transmitted FTS count (Shawn Lin)
   - Increase the Max Credit update interval (Rajat Jain)

  Samsung Exynos host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  ST Microelectronics SPEAr13xx host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  Synopsys DesignWare host bridge driver:
   - Return data directly from dw_pcie_readl_rc() (Bjorn Helgaas)
   - Exchange viewport of `MEMORYs' and `CFGs/IOs' (Dong Bo)
   - Check LTSSM training bit before deciding link is up (Jisheng Zhang)
   - Move link wait definitions to .c file (Joao Pinto)
   - Wait for iATU enable (Joao Pinto)
   - Add iATU Unroll feature (Joao Pinto)
   - Fix pci_remap_iospace() failure path (Lorenzo Pieralisi)
   - Make explicitly non-modular (Paul Gortmaker)
   - Relax device number checking to allow SR-IOV (Po Liu)
   - Keep viewport fixed for IO transaction if num_viewport > 2 (Pratyush Anand)
   - Remove redundant platform_get_resource() return value check (Wei Yongjun)

  TI DRA7xx host bridge driver:
   - Make explicitly non-modular (Paul Gortmaker)

  TI Keystone host bridge driver:
   - Propagate request_irq() failure (Wei Yongjun)

  Xilinx AXI host bridge driver:
   - Keep both legacy and MSI interrupt domain references (Bharat Kumar Gogada)
   - Clear interrupt register for invalid interrupt (Bharat Kumar Gogada)
   - Clear correct MSI set bit (Bharat Kumar Gogada)
   - Dispose of MSI virtual IRQ (Bharat Kumar Gogada)
   - Make explicitly non-modular (Paul Gortmaker)
   - Relax device number checking to allow SR-IOV (Po Liu)

  Xilinx NWL host bridge driver:
   - Expand error logging (Bharat Kumar Gogada)
   - Enable all MSI interrupts using MSI mask (Bharat Kumar Gogada)
   - Make explicitly non-modular (Paul Gortmaker)

  Miscellaneous:
   - Drop CONFIG_KEXEC_CORE ifdeffery (Lukas Wunner)
   - portdrv: Make explicitly non-modular (Paul Gortmaker)
   - Make DPC explicitly non-modular (Paul Gortmaker)"

* tag 'pci-v4.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (105 commits)
  x86/PCI: VMD: Move VMD driver to drivers/pci/host
  PCI: rockchip: Fix wrong transmitted FTS count
  PCI: rockchip: Improve the deassert sequence of four reset pins
  PCI: rockchip: Increase the Max Credit update interval
  PCI: rcar: Try increasing PCIe link speed to 5 GT/s at boot
  PCI/AER: Fix aer_probe() kernel-doc comment
  PCI: Ignore requested alignment for VF BARs
  PCI: Ignore requested alignment for PROBE_ONLY and fixed resources
  PCI: Avoid unnecessary resume after direct-complete
  PCI: Recognize D3cold in pci_update_current_state()
  PCI: Query platform firmware for device power state
  PCI: Afford direct-complete to devices with non-standard PM
  PCI/AER: Cache capability position
  PCI/AER: Avoid memory allocation in interrupt handling path
  x86/PCI: VMD: Request userspace control of PCIe hotplug indicators
  PCI: pciehp: Allow exclusive userspace control of indicators
  ACPI / APEI: Send correct severity to calculate AER severity
  PCI/AER: Remove duplicate AER severity translation
  x86/PCI: VMD: Synchronize with RCU freeing MSI IRQ descs
  x86/PCI: VMD: Eliminate index member from IRQ list
  ...
 2016-10-07 11:46:37 -07:00
Linus Torvalds
541efb7632 xen: features and fixes for 4.9-rc0 
- Switch to new CPU hotplug mechanism.
 - Support driver_override in pciback.
 - Require vector callback for HVM guests (the alternate mechanism via
   the platform device has been broken for ages).
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Merge tag 'for-linus-4.9-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
 "xen features and fixes for 4.9:

   - switch to new CPU hotplug mechanism

   - support driver_override in pciback

   - require vector callback for HVM guests (the alternate mechanism via
     the platform device has been broken for ages)"

* tag 'for-linus-4.9-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/x86: Update topology map for PV VCPUs
  xen/x86: Initialize per_cpu(xen_vcpu, 0) a little earlier
  xen/pciback: support driver_override
  xen/pciback: avoid multiple entries in slot list
  xen/pciback: simplify pcistub device handling
  xen: Remove event channel notification through Xen PCI platform device
  xen/events: Convert to hotplug state machine
  xen/x86: Convert to hotplug state machine
  x86/xen: add missing \n at end of printk warning message
  xen/grant-table: Use kmalloc_array() in arch_gnttab_valloc()
  xen: Make VPMU init message look less scary
  xen: rename xen_pmu_init() in sys-hypervisor.c
  hotplug: Prevent alloc/free of irq descriptors during cpu up/down (again)
  xen/x86: Move irq allocation from Xen smp_op.cpu_up()
 2016-10-06 11:19:10 -07:00
Bjorn Helgaas
bdf530984d Merge branch 'pci/host-vmd' into next 
* pci/host-vmd:
  x86/PCI: VMD: Move VMD driver to drivers/pci/host
  x86/PCI: VMD: Synchronize with RCU freeing MSI IRQ descs
  x86/PCI: VMD: Eliminate index member from IRQ list
  x86/PCI: VMD: Eliminate vmd_vector member from list type
  x86/PCI: VMD: Convert to use pci_alloc_irq_vectors() API
  x86/PCI: VMD: Allocate IRQ lists with correct MSI-X count
  PCI: Use positive flags in pci_alloc_irq_vectors()
  PCI: Update "pci=resource_alignment" documentation

Conflicts:
	drivers/pci/host/Kconfig
	drivers/pci/host/Makefile
 2016-10-05 14:00:21 -05:00
Keith Busch
181ffd19cc x86/PCI: VMD: Move VMD driver to drivers/pci/host 
Move the driver source and Kconfig to the PCI host bridge drivers directory
and move the config option to a more appropriate sub-menu instead of
occupying the top-level location.

Update the Kconfig option with the X86_64 dependency that was implicitly
included from the previous location, and add information about the module
name when built as a loadable module.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Jon Derrick <jonathan.derrick@intel.com>
 2016-10-04 12:26:37 -05:00
KarimAllah Ahmed
72a9b18629 xen: Remove event channel notification through Xen PCI platform device 
Ever since commit 254d1a3f02 ("xen/pv-on-hvm kexec: shutdown watches
from old kernel") using the INTx interrupt from Xen PCI platform
device for event channel notification would just lockup the guest
during bootup.  postcore_initcall now calls xs_reset_watches which
will eventually try to read a value from XenStore and will get stuck
on read_reply at XenBus forever since the platform driver is not
probed yet and its INTx interrupt handler is not registered yet. That
means that the guest can not be notified at this moment of any pending
event channels and none of the per-event handlers will ever be invoked
(including the XenStore one) and the reply will never be picked up by
the kernel.

The exact stack where things get stuck during xenbus_init:

-xenbus_init
 -xs_init
  -xs_reset_watches
   -xenbus_scanf
    -xenbus_read
     -xs_single
      -xs_single
       -xs_talkv

Vector callbacks have always been the favourite event notification
mechanism since their introduction in commit 38e20b07ef ("x86/xen:
event channels delivery on HVM.") and the vector callback feature has
always been advertised for quite some time by Xen that's why INTx was
broken for several years now without impacting anyone.

Luckily this also means that event channel notification through INTx
is basically dead-code which can be safely removed without impacting
anybody since it has been effectively disabled for more than 4 years
with nobody complaining about it (at least as far as I'm aware of).

This commit removes event channel notification through Xen PCI
platform device.

Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Julien Grall <julien.grall@citrix.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Ross Lagerwall <ross.lagerwall@citrix.com>
Cc: xen-devel@lists.xenproject.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: Anthony Liguori <aliguori@amazon.com>
Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
 2016-09-30 11:44:34 +01:00
Keith Busch
3161832d58 x86/PCI: VMD: Request userspace control of PCIe hotplug indicators 
Add set_dev_domain_options() to set PCI domain-specific options as devices
are added.  The first usage is to request exclusive userspace control of
PCIe hotplug indicators in VMD domains.

Devices in a VMD domain use PCIe hotplug Attention and Power Indicators in
a non-standard way; tell pciehp to ignore the indicators so userspace can
control them via the sysfs "attention" file.

To determine whether a bus is within a VMD domain, add a bool to the
pci_sysdata structure that the VMD driver sets during initialization.

[bhelgaas: changelog]
Requested-by: Kapil Karkra <kapil.karkra@intel.com>
Tested-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-09-23 08:41:08 -05:00
Keith Busch
ee6ee49fd0 x86/PCI: VMD: Synchronize with RCU freeing MSI IRQ descs 
Fix a potential race when disabling MSI/MSI-X on a VMD domain device.  If
the VMD interrupt service is running, it may see a disabled IRQ.  We can
synchronize RCU just before freeing the MSI descriptor.  This is safe since
the irq_desc lock isn't held, and the descriptor is valid even though it is
disabled.  After vmd_msi_free(), though, the handler is reinitialized to
handle_bad_irq(), so we can't let the VMD ISR's list iteration see the
disabled IRQ after this.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by Jon Derrick: <jonathan.derrick@intel.com>
 2016-09-19 13:14:05 -05:00
Jon Derrick
b31822277a x86/PCI: VMD: Eliminate index member from IRQ list 
Use math to discover the IRQ list index number relative to the IRQ list
head.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Keith Busch <keith.busch@intel.com>
 2016-09-19 13:14:05 -05:00
Jon Derrick
53db86adc2 x86/PCI: VMD: Eliminate vmd_vector member from list type 
Eliminate unused vmd and vector members from vmd_irq_list and discover the
vector using pci_irq_vector().

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Keith Busch <keith.busch@intel.com>
 2016-09-19 13:14:05 -05:00
Jon Derrick
75de9b4cd3 x86/PCI: VMD: Convert to use pci_alloc_irq_vectors() API 
Convert to use the pci_alloc_irq_vectors() API.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
 2016-09-19 13:14:05 -05:00
Jon Derrick
c68db51589 x86/PCI: VMD: Allocate IRQ lists with correct MSI-X count 
To reduce the amount of memory required for IRQ lists, only allocate their
space after calling pci_msix_enable_range() which may reduce the number of
MSI-X vectors allocated.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
 2016-09-19 13:14:05 -05:00
Ingo Molnar
d4b80afbba Merge branch 'linus' into x86/asm, to pick up recent fixes 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-09-15 08:24:53 +02:00
Bjorn Helgaas
6af7e4f772 PCI: Mark Haswell Power Control Unit as having non-compliant BARs 
The Haswell Power Control Unit has a non-PCI register (CONFIG_TDP_NOMINAL)
where BAR 0 is supposed to be.  This is erratum HSE43 in the spec update
referenced below:

  The PCIe* Base Specification indicates that Configuration Space Headers
  have a base address register at offset 0x10.  Due to this erratum, the
  Power Control Unit's CONFIG_TDP_NOMINAL CSR (Bus 1; Device 30; Function
  3; Offset 0x10) is located where a base register is expected.

Mark the PCU as having non-compliant BARs so we don't try to probe any of
them.  There are no other BARs on this device.

Rename the quirk so it's not Broadwell-specific.

Link: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html
Link: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-datasheet-vol-2.html (section 5.4, Device 30 Function 3)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=153881
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Myron Stowe <myron.stowe@redhat.com>
 2016-09-01 08:52:29 -05:00
Keith Busch
21c80c9fef x86/PCI: VMD: Fix infinite loop executing irq's 
We can't initialize the list head on deletion as this causes the node to
point to itself, which causes an infinite loop if vmd_irq() happens to be
servicing that node.

The list initialization was trying to fix a bug from multiple calls to
disable the same IRQ.  Fix this instead by having the VMD driver track if
the interrupt is enabled.

[bhelgaas: changelog, add "Fixes"]
Fixes: 97e9230635 ("x86/PCI: VMD: Initialize list item in IRQ disable")
Reported-by: Grzegorz Koczot <grzegorz.koczot@intel.com>
Tested-by: Miroslaw Drost <miroslaw.drost@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by Jon Derrick: <jonathan.derrick@intel.com>
 2016-08-23 16:36:42 -05:00
Kees Cook
404f6aac9b x86: Apply more __ro_after_init and const 
Guided by grsecurity's analogous __read_only markings in arch/x86,
this applies several uses of __ro_after_init to structures that are
only updated during __init, and const for some structures that are
never updated.  Additionally extends __init markings to some functions
that are only used during __init, and cleans up some missing C99 style
static initializers.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brad Spengler <spender@grsecurity.net>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Brown <david.brown@linaro.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-hardening@lists.openwall.com
Link: http://lkml.kernel.org/r/20160808232906.GA29731@www.outflux.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-08-10 14:55:05 +02:00
Krzysztof Kozlowski
00085f1efa dma-mapping: use unsigned long for dma_attrs 
The dma-mapping core and the implementations do not change the DMA
attributes passed by pointer.  Thus the pointer can point to const data.
However the attributes do not have to be a bitfield.  Instead unsigned
long will do fine:

1. This is just simpler.  Both in terms of reading the code and setting
   attributes.  Instead of initializing local attributes on the stack
   and passing pointer to it to dma_set_attr(), just set the bits.

2. It brings safeness and checking for const correctness because the
   attributes are passed by value.

Semantic patches for this change (at least most of them):

    virtual patch
    virtual context

    @r@
    identifier f, attrs;

    @@
    f(...,
    - struct dma_attrs *attrs
    + unsigned long attrs
    , ...)
    {
    ...
    }

    @@
    identifier r.f;
    @@
    f(...,
    - NULL
    + 0
     )

and

    // Options: --all-includes
    virtual patch
    virtual context

    @r@
    identifier f, attrs;
    type t;

    @@
    t f(..., struct dma_attrs *attrs);

    @@
    identifier r.f;
    @@
    f(...,
    - NULL
    + 0
     )

Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Acked-by: Mark Salter <msalter@redhat.com> [c6x]
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> [cris]
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> [drm]
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Acked-by: Joerg Roedel <jroedel@suse.de> [iommu]
Acked-by: Fabien Dessenne <fabien.dessenne@st.com> [bdisp]
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> [vb2-core]
Acked-by: David Vrabel <david.vrabel@citrix.com> [xen]
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen swiotlb]
Acked-by: Joerg Roedel <jroedel@suse.de> [iommu]
Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon]
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390]
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> [avr32]
Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc]
Acked-by: Robin Murphy <robin.murphy@arm.com> [arm64 and dma-iommu]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-08-04 08:50:07 -04:00
Linus Torvalds
c8d0267efd PCI changes for the v4.8 merge window: 
Enumeration
     Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
     Add parent device field to ECAM struct pci_config_window (Jayachandran C)
     Add generic MCFG table handling (Tomasz Nowicki)
     Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
     Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)
 
   Resource management
     Add devm_request_pci_bus_resources() (Bjorn Helgaas)
     Unify pci_resource_to_user() declarations (Bjorn Helgaas)
     Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
     Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
     Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
     Ignore write combining when mapping I/O port space (Bjorn Helgaas)
     Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
     Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
     Support I/O resources when parsing host bridge resources (Jayachandran C)
     Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
     Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
     Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
     Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
     Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
     Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
     Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
     Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)
 
   PCI device hotplug
     Allow additional bus numbers for hotplug bridges (Keith Busch)
     Ignore interrupts during D3cold (Lukas Wunner)
 
   Power management
     Enforce type casting for pci_power_t (Andy Shevchenko)
     Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
     Put PCIe ports into D3 during suspend (Mika Westerberg)
     Power on bridges before scanning new devices (Mika Westerberg)
     Runtime resume bridge before rescan (Mika Westerberg)
     Add runtime PM support for PCIe ports (Mika Westerberg)
     Remove redundant check of pcie_set_clkpm (Shawn Lin)
 
   Virtualization
     Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
     Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
     Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
     Add ACS quirk for Solarflare SFC9220 (Edward Cree)
 
   MSI
     Fix PCI_MSI dependencies (Arnd Bergmann)
     Add pci_msix_desc_addr() helper (Christoph Hellwig)
     Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
     Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
     Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
     Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)
 
   Error Handling
     Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
     Remove DPC tristate module option (Keith Busch)
     Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)
 
   Generic host bridge driver
     Select IRQ_DOMAIN (Arnd Bergmann)
     Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
 
   ACPI host bridge driver
     Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
     Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
     Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
     Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)
 
   Altera host bridge driver
     Check link status before retrain link (Ley Foon Tan)
     Poll for link up status after retraining the link (Ley Foon Tan)
 
   Axis ARTPEC-6 host bridge driver
     Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
     Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
     Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)
 
   Intel VMD host bridge driver
     Use lock save/restore in interrupt enable path (Jon Derrick)
     Select device dma ops to override (Keith Busch)
     Initialize list item in IRQ disable (Keith Busch)
     Use x86_vector_domain as parent domain (Keith Busch)
     Separate MSI and MSI-X vector sharing (Keith Busch)
 
   Marvell Aardvark host bridge driver
     Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
     Add Aardvark PCI host controller driver (Thomas Petazzoni)
     Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)
 
   Microsoft Hyper-V host bridge driver
     Fix interrupt cleanup path (Cathy Avery)
     Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
     Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
 
   NVIDIA Tegra host bridge driver
     Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
     Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
     Use lower-case hex consistently for register definitions (Thierry Reding)
     Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
     Stop setting pcibios_min_mem (Thierry Reding)
 
   Renesas R-Car host bridge driver
     Drop gen2 dummy I/O port region (Bjorn Helgaas)
 
   TI DRA7xx host bridge driver
     Fix return value in case of error (Christophe JAILLET)
 
   Xilinx AXI host bridge driver
     Fix return value in case of error (Christophe JAILLET)
 
   Miscellaneous
     Make bus_attr_resource_alignment static (Ben Dooks)
     Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
     MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
     Make host bridge drivers explicitly non-modular (Paul Gortmaker)
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Merge tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Highlights:

   - ARM64 support for ACPI host bridges

   - new drivers for Axis ARTPEC-6 and Marvell Aardvark

   - new pci_alloc_irq_vectors() interface for MSI-X, MSI, legacy INTx

   - pci_resource_to_user() cleanup (more to come)

  Detailed summary:

  Enumeration:
   - Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
   - Add parent device field to ECAM struct pci_config_window (Jayachandran C)
   - Add generic MCFG table handling (Tomasz Nowicki)
   - Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
   - Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)

  Resource management:
   - Add devm_request_pci_bus_resources() (Bjorn Helgaas)
   - Unify pci_resource_to_user() declarations (Bjorn Helgaas)
   - Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
   - Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
   - Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
   - Ignore write combining when mapping I/O port space (Bjorn Helgaas)
   - Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
   - Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
   - Support I/O resources when parsing host bridge resources (Jayachandran C)
   - Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
   - Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
   - Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
   - Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
   - Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
   - Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
   - Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
   - Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)

  PCI device hotplug:
   - Allow additional bus numbers for hotplug bridges (Keith Busch)
   - Ignore interrupts during D3cold (Lukas Wunner)

  Power management:
   - Enforce type casting for pci_power_t (Andy Shevchenko)
   - Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
   - Put PCIe ports into D3 during suspend (Mika Westerberg)
   - Power on bridges before scanning new devices (Mika Westerberg)
   - Runtime resume bridge before rescan (Mika Westerberg)
   - Add runtime PM support for PCIe ports (Mika Westerberg)
   - Remove redundant check of pcie_set_clkpm (Shawn Lin)

  Virtualization:
   - Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
   - Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
   - Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
   - Add ACS quirk for Solarflare SFC9220 (Edward Cree)

  MSI:
   - Fix PCI_MSI dependencies (Arnd Bergmann)
   - Add pci_msix_desc_addr() helper (Christoph Hellwig)
   - Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
   - Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
   - Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
   - Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)

  Error Handling:
   - Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
   - Remove DPC tristate module option (Keith Busch)
   - Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)

  Generic host bridge driver:
   - Select IRQ_DOMAIN (Arnd Bergmann)
   - Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)

  ACPI host bridge driver:
   - Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
   - Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
   - Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
   - Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)

  Altera host bridge driver:
   - Check link status before retrain link (Ley Foon Tan)
   - Poll for link up status after retraining the link (Ley Foon Tan)

  Axis ARTPEC-6 host bridge driver:
   - Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
   - Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
   - Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)

  Intel VMD host bridge driver:
   - Use lock save/restore in interrupt enable path (Jon Derrick)
   - Select device dma ops to override (Keith Busch)
   - Initialize list item in IRQ disable (Keith Busch)
   - Use x86_vector_domain as parent domain (Keith Busch)
   - Separate MSI and MSI-X vector sharing (Keith Busch)

  Marvell Aardvark host bridge driver:
   - Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
   - Add Aardvark PCI host controller driver (Thomas Petazzoni)
   - Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)

  Microsoft Hyper-V host bridge driver:
   - Fix interrupt cleanup path (Cathy Avery)
   - Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
   - Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)

  NVIDIA Tegra host bridge driver:
   - Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
   - Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
   - Use lower-case hex consistently for register definitions (Thierry Reding)
   - Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
   - Stop setting pcibios_min_mem (Thierry Reding)

  Renesas R-Car host bridge driver:
   - Drop gen2 dummy I/O port region (Bjorn Helgaas)

  TI DRA7xx host bridge driver:
   - Fix return value in case of error (Christophe JAILLET)

  Xilinx AXI host bridge driver:
   - Fix return value in case of error (Christophe JAILLET)

  Miscellaneous:
   - Make bus_attr_resource_alignment static (Ben Dooks)
   - Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
   - MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
   - Make host bridge drivers explicitly non-modular (Paul Gortmaker)"

* tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (125 commits)
  PCI: xgene: Make explicitly non-modular
  PCI: thunder-pem: Make explicitly non-modular
  PCI: thunder-ecam: Make explicitly non-modular
  PCI: tegra: Make explicitly non-modular
  PCI: rcar-gen2: Make explicitly non-modular
  PCI: rcar: Make explicitly non-modular
  PCI: mvebu: Make explicitly non-modular
  PCI: layerscape: Make explicitly non-modular
  PCI: keystone: Make explicitly non-modular
  PCI: hisi: Make explicitly non-modular
  PCI: generic: Make explicitly non-modular
  PCI: designware-plat: Make it explicitly non-modular
  PCI: artpec6: Make explicitly non-modular
  PCI: armada8k: Make explicitly non-modular
  PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
  PCI: Add ACS quirk for Solarflare SFC9220
  arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
  PCI: aardvark: Add Aardvark PCI host controller driver
  dt-bindings: add DT binding for the Aardvark PCIe controller
  PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values
  ...
 2016-08-02 17:12:29 -04:00
Linus Torvalds
aeb35d6b74 Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 header cleanups from Ingo Molnar:
 "This tree is a cleanup of the x86 tree reducing spurious uses of
  module.h - which should improve build performance a bit"

* 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, crypto: Restore MODULE_LICENSE() to glue_helper.c so it loads
  x86/apic: Remove duplicated include from probe_64.c
  x86/ce4100: Remove duplicated include from ce4100.c
  x86/headers: Include spinlock_types.h in x8664_ksyms_64.c for missing spinlock_t
  x86/platform: Delete extraneous MODULE_* tags fromm ts5500
  x86: Audit and remove any remaining unnecessary uses of module.h
  x86/kvm: Audit and remove any unnecessary uses of module.h
  x86/xen: Audit and remove any unnecessary uses of module.h
  x86/platform: Audit and remove any unnecessary uses of module.h
  x86/lib: Audit and remove any unnecessary uses of module.h
  x86/kernel: Audit and remove any unnecessary uses of module.h
  x86/mm: Audit and remove any unnecessary uses of module.h
  x86: Don't use module.h just for AUTHOR / LICENSE tags
 2016-08-01 14:23:42 -04:00
Bjorn Helgaas
a04bee8285 Merge branches 'pci/host-aardvark', 'pci/host-altera', 'pci/host-dra7xx', 'pci/host-hv', 'pci/host-vmd' and 'pci/host-xilinx' into next 
* pci/host-aardvark:
  arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
  PCI: aardvark: Add Aardvark PCI host controller driver
  dt-bindings: add DT binding for the Aardvark PCIe controller

* pci/host-altera:
  PCI: altera: Poll for link up status after retraining the link
  PCI: altera: Check link status before retrain link
  PCI: altera: Reorder read/write functions

* pci/host-dra7xx:
  PCI: dra7xx: Fix return value in case of error

* pci/host-hv:
  PCI: hv: Fix interrupt cleanup path
  PCI: hv: Handle all pending messages in hv_pci_onchannelcallback()
  PCI: hv: Don't leak buffer in hv_pci_onchannelcallback()

* pci/host-vmd:
  x86/PCI: VMD: Separate MSI and MSI-X vector sharing
  x86/PCI: VMD: Use x86_vector_domain as parent domain
  x86/PCI: VMD: Use lock save/restore in interrupt enable path
  x86/PCI: VMD: Initialize list item in IRQ disable
  x86/PCI: VMD: Select device dma ops to override

* pci/host-xilinx:
  PCI: xilinx: Fix return value in case of error

Manually apply changes from pci/demodularize-hosts and
pci/host-request-windows to drivers/pci/host/pci-aardvark.c
 2016-08-01 12:32:13 -05:00
Linus Torvalds
e65805251f Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull irq updates from Thomas Gleixner:
 "The irq department delivers:

   - new core infrastructure to allow better management of multi-queue
     devices (interrupt spreading, node aware descriptor allocation ...)

   - a new interrupt flow handler to support the new fangled Intel VMD
     devices.

   - yet another new interrupt controller driver.

   - a series of fixes which addresses sparse warnings, missing
     includes, missing static declarations etc from Ben Dooks.

   - a fix for the error handling in the hierarchical domain allocation
     code.

   - the usual pile of small updates to core and driver code"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
  genirq: Fix missing irq allocation affinity hint
  irqdomain: Fix irq_domain_alloc_irqs_recursive() error handling
  irq/Documentation: Correct result of echnoing 5 to smp_affinity
  MAINTAINERS: Remove Jiang Liu from irq domains
  genirq/msi: Fix broken debug output
  genirq: Add a helper to spread an affinity mask for MSI/MSI-X vectors
  genirq/msi: Make use of affinity aware allocations
  genirq: Use affinity hint in irqdesc allocation
  genirq: Add affinity hint to irq allocation
  genirq: Introduce IRQD_AFFINITY_MANAGED flag
  genirq/msi: Remove unused MSI_FLAG_IDENTITY_MAP
  irqchip/s3c24xx: Fixup IO accessors for big endian
  irqchip/exynos-combiner: Fix usage of __raw IO
  irqdomain: Fix disposal of mappings for interrupt hierarchies
  irqchip/aspeed-vic: Add irq controller for Aspeed
  doc/devicetree: Add Aspeed VIC bindings
  x86/PCI/VMD: Use untracked irq handler
  genirq: Add untracked irq handler
  irqchip/mips-gic: Populate irq_domain names
  irqchip/gicv3-its: Implement two-level(indirect) device table support
  ...
 2016-07-25 21:35:03 -07:00
Linus Torvalds
8e466955d6 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 platform updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Intel-SoC enhancements (Andy Shevchenko)

   - Intel CPU symbolic model definition rework (Dave Hansen)

   - ... other misc changes"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
  x86/sfi: Enable enumeration of SD devices
  x86/pci: Use MRFLD abbreviation for Merrifield
  x86/platform/intel-mid: Make vertical indentation consistent
  x86/platform/intel-mid: Mark regulators explicitly defined
  x86/platform/intel-mid: Rename mrfl.c to mrfld.c
  x86/platform/intel-mid: Enable spidev on Intel Edison boards
  x86/platform/intel-mid: Extend PWRMU to support Penwell
  x86/pci, x86/platform/intel_mid_pci: Remove duplicate power off code
  x86/platform/intel-mid: Add pinctrl for Intel Merrifield
  x86/platform/intel-mid: Enable GPIO expanders on Edison
  x86/platform/intel-mid: Add Power Management Unit driver
  x86/platform/atom/punit: Enable support for Merrifield
  x86/platform/intel_mid_pci: Rework IRQ0 workaround
  x86, thermal: Clean up and fix CPU model detection for intel_soc_dts_thermal
  x86, mmc: Use Intel family name macros for mmc driver
  x86/intel_telemetry: Use Intel family name macros for telemetry driver
  x86/acpi/lss: Use Intel family name macros for the acpi_lpss driver
  x86/cpufreq: Use Intel family name macros for the intel_pstate cpufreq driver
  x86/platform: Use new Intel model number macros
  x86/intel_idle: Use Intel family macros for intel_idle
  ...
 2016-07-25 19:15:35 -07:00
Paul Gortmaker
eb008eb6f8 x86: Audit and remove any remaining unnecessary uses of module.h 
Historically a lot of these existed because we did not have
a distinction between what was modular code and what was providing
support to modules via EXPORT_SYMBOL and friends.  That changed
when we forked out support for the latter into the export.h file.

This means we should be able to reduce the usage of module.h
in code that is obj-y Makefile or bool Kconfig.  In the case of
some of these which are modular, we can extend that to also include
files that are building basic support functionality but not related
to loading or registering the final module; such files also have
no need whatsoever for module.h

The advantage in removing such instances is that module.h itself
sources about 15 other headers; adding significantly to what we feed
cpp, and it can obscure what headers we are effectively using.

Since module.h was the source for init.h (for __init) and for
export.h (for EXPORT_SYMBOL) we consider each instance for the
presence of either and replace as needed.

In the case of crypto/glue_helper.c we delete a redundant instance
of MODULE_LICENSE in order to delete module.h -- the license info
is already present at the top of the file.

The uncore change warrants a mention too; it is uncore.c that uses
module.h and not uncore.h; hence the relocation done there.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160714001901.31603-9-paul.gortmaker@windriver.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-14 15:07:00 +02:00
Ingo Molnar
8b3843996d Merge branch 'x86/platform' into x86/headers, to apply dependent patches 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-14 13:01:15 +02:00
Andy Shevchenko
707a605b5a x86/pci: Use MRFLD abbreviation for Merrifield 
Everywhere in the kernel the MRFLD is used as abbreviation of Intel Merrifield.
Do the same in intel_mid_pci.c module.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1468321462-136016-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-13 09:24:51 +02:00
Andy Shevchenko
e99a0745bd x86/pci, x86/platform/intel_mid_pci: Remove duplicate power off code 
Intel MID platforms (Moorestown, Medfield, Clovertrail, Merrifield) are
sharing the code in the intel_mid_pci.c module. There is no need to
power off specific Moorestown devices after the following commit:

  5823d0893e ("x86/platform/intel-mid: Add Power Management Unit driver")

... because the condition in mrfld_power_off_dev() is true for any platform
from the above list.

Remove duplicate power off certain devices on Intel Moorestown and rename
the affected functions to show that they are applied to any of Intel MID
platforms.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1467749348-100518-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-07-08 11:00:05 +02:00
Sinan Kaya
487cf917ed Revert "ACPI, PCI, IRQ: remove redundant code in acpi_irq_penalty_init()" 
Trying to make the ISA and PCI init functionality common turned out
to be a bad idea, because the ISA path depends on external
functionality.

Restore the previous behavior and limit the refactoring to PCI
interrupts only.

Fixes: 1fcb6a813c "ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init()"
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Tested-by: Wim Osterholt <wim@djo.tudelft.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2016-07-02 01:38:34 +02:00
Keith Busch
9c2053040c x86/PCI: VMD: Separate MSI and MSI-X vector sharing 
Child devices in a VMD domain that want to use MSI are slowing down MSI-X
using devices sharing the same vectors.  Move all MSI usage to a single VMD
vector, and MSI-X devices can share the rest.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jon Derrick <jonathan.derrick@intel.com>
 2016-06-20 14:41:16 -05:00
Keith Busch
e382dffc90 x86/PCI: VMD: Use x86_vector_domain as parent domain 
Otherwise APIC code assumes VMD's IRQ domain can be managed by the APIC,
resulting in an invalid cast of irq_data during irq_force_complete_move().

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-06-20 14:32:07 -05:00
Jon Derrick
3f57ff4f9c x86/PCI: VMD: Use lock save/restore in interrupt enable path 
Enabling interrupts may result in an interrupt raised and serviced while
VMD holds a lock, resulting in contention with the spin lock held while
enabling interrupts.

The solution is to disable preemption and save/restore the state during
interrupt enable and disable.

Fixes lockdep:

  ======================================================
  [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
  4.6.0-2016-06-16-lockdep+ #47 Tainted: G            E
  ------------------------------------------------------
  kworker/0:1/447 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
   (list_lock){+.+...}, at: [<ffffffffa04eb8fc>] vmd_irq_enable+0x3c/0x70 [vmd]

  and this task is already holding:
   (&irq_desc_lock_class){-.-...}, at: [<ffffffff810e1ff6>] __setup_irq+0xa6/0x610
  which would create a new lock dependency:
   (&irq_desc_lock_class){-.-...} -> (list_lock){+.+...}

  but this new dependency connects a HARDIRQ-irq-safe lock:
   (&irq_desc_lock_class){-.-...}
  ... which became HARDIRQ-irq-safe at:
    [<ffffffff810c9f21>] __lock_acquire+0x981/0xe00
    [<ffffffff810cb039>] lock_acquire+0x119/0x220
    [<ffffffff8167294d>] _raw_spin_lock+0x3d/0x80
    [<ffffffff810e36d4>] handle_level_irq+0x24/0x110
    [<ffffffff8101f20a>] handle_irq+0x1a/0x30
    [<ffffffff81675fc1>] do_IRQ+0x61/0x120
    [<ffffffff8167404c>] ret_from_intr+0x0/0x20
    [<ffffffff81672e30>] _raw_spin_unlock_irqrestore+0x40/0x60
    [<ffffffff810e21ee>] __setup_irq+0x29e/0x610
    [<ffffffff810e25a1>] setup_irq+0x41/0x90
    [<ffffffff81f5777f>] setup_default_timer_irq+0x1e/0x20
    [<ffffffff81f57798>] hpet_time_init+0x17/0x19
    [<ffffffff81f5775a>] x86_late_time_init+0xa/0x11
    [<ffffffff81f51e9b>] start_kernel+0x382/0x436
    [<ffffffff81f51308>] x86_64_start_reservations+0x2a/0x2c
    [<ffffffff81f51445>] x86_64_start_kernel+0x13b/0x14a

  to a HARDIRQ-irq-unsafe lock:
   (list_lock){+.+...}
  ... which became HARDIRQ-irq-unsafe at:
  ...  [<ffffffff810c9d8e>] __lock_acquire+0x7ee/0xe00
    [<ffffffff810cb039>] lock_acquire+0x119/0x220
    [<ffffffff8167294d>] _raw_spin_lock+0x3d/0x80
    [<ffffffffa04eba42>] vmd_msi_init+0x72/0x150 [vmd]
    [<ffffffff810e8597>] msi_domain_alloc+0xb7/0x140
    [<ffffffff810e6b10>] irq_domain_alloc_irqs_recursive+0x40/0xa0
    [<ffffffff810e6cea>] __irq_domain_alloc_irqs+0x14a/0x330
    [<ffffffff810e8a8c>] msi_domain_alloc_irqs+0x8c/0x1d0
    [<ffffffff813ca4e3>] pci_msi_setup_msi_irqs+0x43/0x70
    [<ffffffff813cada1>] pci_enable_msi_range+0x131/0x280
    [<ffffffff813bf5e0>] pcie_port_device_register+0x320/0x4e0
    [<ffffffff813bf9a4>] pcie_portdrv_probe+0x34/0x60
    [<ffffffff813b0e85>] local_pci_probe+0x45/0xa0
    [<ffffffff813b226b>] pci_device_probe+0xdb/0x130
    [<ffffffff8149e3cc>] driver_probe_device+0x22c/0x440
    [<ffffffff8149e774>] __device_attach_driver+0x94/0x110
    [<ffffffff8149bfad>] bus_for_each_drv+0x5d/0x90
    [<ffffffff8149e030>] __device_attach+0xc0/0x140
    [<ffffffff8149e0c0>] device_attach+0x10/0x20
    [<ffffffff813a77f7>] pci_bus_add_device+0x47/0x90
    [<ffffffff813a7879>] pci_bus_add_devices+0x39/0x70
    [<ffffffff813aaba7>] pci_rescan_bus+0x27/0x30
    [<ffffffffa04ec1af>] vmd_probe+0x68f/0x76c [vmd]
    [<ffffffff813b0e85>] local_pci_probe+0x45/0xa0
    [<ffffffff81088064>] work_for_cpu_fn+0x14/0x20
    [<ffffffff8108c244>] process_one_work+0x1f4/0x740
    [<ffffffff8108c9c6>] worker_thread+0x236/0x4f0
    [<ffffffff810935c2>] kthread+0xf2/0x110
    [<ffffffff816738f2>] ret_from_fork+0x22/0x50

  other info that might help us debug this:

   Possible interrupt unsafe locking scenario:

	 CPU0                    CPU1
	 ----                    ----
    lock(list_lock);
				 local_irq_disable();
				 lock(&irq_desc_lock_class);
				 lock(list_lock);
    <Interrupt>
      lock(&irq_desc_lock_class);

   *** DEADLOCK ***

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Keith Busch <keith.busch@intel.com>
 2016-06-20 14:16:04 -05:00
Keith Busch
30ce035038 x86/PCI/VMD: Use untracked irq handler 
There is no way to know which device in a VMD triggered an interrupt
without invoking every registered driver's actions. This uses the
untracked irq handler so that a less used device does not trigger
spurious interrupt.

We have been previously recommending users to enable "noirqdebug", but do
not want to force a system setting just to keep this domain functional.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Cc: Jon Derrick <jonathan.derrick@intel.com>
Link: http://lkml.kernel.org/r/1466200821-29159-2-git-send-email-keith.busch@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 2016-06-18 10:00:55 +02:00
Andy Shevchenko
5823d0893e x86/platform/intel-mid: Add Power Management Unit driver 
Add Power Management Unit driver to handle power states of South Complex
devices on Intel Tangier. In the future it might be expanded to cover North
Complex devices as well.

With this driver the power state of the host controllers such as SPI, I2C,
UART, eMMC, and DMA would be managed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: David Cohen <david.a.cohen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-pci@vger.kernel.org
Link: http://lkml.kernel.org/r/1465928985-12113-1-git-send-email-andriy.shevchenko@linux.intel.com
[ Minor readability edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-06-15 10:10:49 +02:00
Andy Shevchenko
bb27570525 x86/platform/intel_mid_pci: Rework IRQ0 workaround 
On Intel Merrifield platform several PCI devices have a bogus configuration,
i.e. the IRQ0 had been assigned to few of them. These are PCI root bridge,
eMMC0, HS UART common registers, PWM, and HDMI. The actual interrupt line can
be allocated to one device exclusively, in our case to eMMC0, the rest should
cope without it and basically known drivers for them are not using interrupt
line at all.

Rework IRQ0 workaround, which was previously done to avoid conflict between
eMMC0 and HS UART common registers, to behave differently based on the device
in question, i.e. allocate interrupt line to eMMC0, but silently skip interrupt
allocation for the rest except HS UART common registers which are not used
anyway. With this rework IOSF MBI driver in particular would be used.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 39d9b77b8d ("x86/pci/intel_mid_pci: Work around for IRQ0 assignment")
Link: http://lkml.kernel.org/r/1465842481-136852-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-06-14 12:44:43 +02:00
Keith Busch
97e9230635 x86/PCI: VMD: Initialize list item in IRQ disable 
Multiple calls to disable an IRQ would have caused the driver to
dereference a poisoned list item.  This re-initializes the list to allow
multiple requests to disable the IRQ.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by Jon Derrick: <jonathan.derrick@intel.com>
 2016-06-13 16:03:03 -05:00
Keith Busch
ca8a8fabb1 x86/PCI: VMD: Select device dma ops to override 
VMD device doesn't usually have device archdata specific dma_ops, so we
need to override the default ops for VMD devices.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by Jon Derrick: <jonathan.derrick@intel.com>
 2016-06-13 15:59:31 -05:00
Andrea Gelmini
386ed2ab85 PCI: Fix comment typo 
Fix typo.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-06-10 19:05:09 -05:00
Linus Torvalds
29567292c0 xen: bug fixes for 4.7-rc0 
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Merge tag 'for-linus-4.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel.

* tag 'for-linus-4.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: use same main loop for counting and remapping pages
  xen/events: Don't move disabled irqs
  xen/x86: actually allocate legacy interrupts on PV guests
  Xen: don't warn about 2-byte wchar_t in efi
  xen/gntdev: reduce copy batch size to 16
  xen/x86: don't lose event interrupts
 2016-05-24 10:22:34 -07:00
Stefano Stabellini
702f926067 xen/x86: actually allocate legacy interrupts on PV guests 
b4ff8389ed is incomplete: relies on nr_legacy_irqs() to get the number
of legacy interrupts when actually nr_legacy_irqs() returns 0 after
probe_8259A(). Use NR_IRQS_LEGACY instead.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
CC: stable@vger.kernel.org
 2016-05-24 12:58:19 +01:00
Linus Torvalds
7afd16f882 PCI changes for the v4.7 merge window: 
Enumeration
     Refine PCI support check in pcibios_init() (Adrian-Ken Rueegsegger)
     Provide common functions for ECAM mapping (Jayachandran C)
     Allow all PCIe services on non-ACPI host bridges (Jon Derrick)
     Remove return values from pcie_port_platform_notify() and relatives (Jon Derrick)
     Widen portdrv service type from 4 bits to 8 bits (Keith Busch)
     Add Downstream Port Containment portdrv service type (Keith Busch)
     Add Downstream Port Containment driver (Keith Busch)
 
   Resource management
     Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs (Alex Williamson)
     Supply CPU physical address (not bus address) to iomem_is_exclusive() (Bjorn Helgaas)
     alpha: Call iomem_is_exclusive() for IORESOURCE_MEM, but not IORESOURCE_IO (Bjorn Helgaas)
     Mark Broadwell-EP Home Agent 1 as having non-compliant BARs (Prarit Bhargava)
     Disable all BAR sizing for devices with non-compliant BARs (Prarit Bhargava)
     Move PCI I/O space management from OF to PCI core code (Tomasz Nowicki)
 
   PCI device hotplug
     acpiphp_ibm: Avoid uninitialized variable reference (Dan Carpenter)
     Use cached copy of PCI_EXP_SLTCAP_HPC bit (Lukas Wunner)
 
   Virtualization
     Mark Intel i40e NIC INTx masking as broken (Alex Williamson)
     Reverse standard ACS vs device-specific ACS enabling (Alex Williamson)
     Work around Intel Sunrise Point PCH incorrect ACS capability (Alex Williamson)
 
   IOMMU
     Add pci_add_dma_alias() to abstract implementation (Bjorn Helgaas)
     Move informational printk to pci_add_dma_alias() (Bjorn Helgaas)
     Add support for multiple DMA aliases (Jacek Lawrynowicz)
     Add DMA alias quirk for mic_x200_dma (Jacek Lawrynowicz)
 
   Thunderbolt
     Fix double free of drom buffer (Andreas Noever)
     Add Intel Thunderbolt device IDs (Lukas Wunner)
     Fix typos and magic number (Lukas Wunner)
     Support 1st gen Light Ridge controller (Lukas Wunner)
 
   Generic host bridge driver
     Use generic ECAM API (Jayachandran C)
 
   Cavium ThunderX host bridge driver
     Don't clobber read-only bits in bridge config registers (David Daney)
     Use generic ECAM API (Jayachandran C)
 
   Freescale i.MX6 host bridge driver
     Use enum instead of bool for variant indicator (Andrey Smirnov)
     Implement reset sequence for i.MX6+ (Andrey Smirnov)
     Factor out ref clock enable (Bjorn Helgaas)
     Add initial imx6sx support (Christoph Fritz)
     Add reset-gpio-active-high boolean property to DT (Petr Štetiar)
     Add DT property for link gen, default to Gen1 (Tim Harvey)
     dts: Specify imx6qp version of PCIe core (Andrey Smirnov)
     dts: Fix PCIe reset GPIO polarity on Toradex Apalis Ixora (Petr Štetiar)
 
   Marvell Armada host bridge driver
     add DT binding for Marvell Armada 7K/8K PCIe controller (Thomas Petazzoni)
     Add driver for Marvell Armada 7K/8K PCIe controller (Thomas Petazzoni)
 
   Marvell MVEBU host bridge driver
     Constify mvebu_pcie_pm_ops structure (Jisheng Zhang)
     Use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS for mvebu_pcie_pm_ops (Jisheng Zhang)
 
   Microsoft Hyper-V host bridge driver
     Report resources release after stopping the bus (Vitaly Kuznetsov)
     Add explicit barriers to config space access (Vitaly Kuznetsov)
 
   Renesas R-Car host bridge driver
     Select PCI_MSI_IRQ_DOMAIN (Arnd Bergmann)
 
   Synopsys DesignWare host bridge driver
     Remove incorrect RC memory base/limit configuration (Gabriele Paoloni)
     Move Root Complex setup code to dw_pcie_setup_rc() (Jisheng Zhang)
 
   TI Keystone host bridge driver
     Add error IRQ handler (Murali Karicheri)
     Remove unnecessary goto statement (Murali Karicheri)
 
   Miscellaneous
     Fix spelling errors (Colin Ian King)
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Merge tag 'pci-v4.7-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:
   - Refine PCI support check in pcibios_init() (Adrian-Ken Rueegsegger)
   - Provide common functions for ECAM mapping (Jayachandran C)
   - Allow all PCIe services on non-ACPI host bridges (Jon Derrick)
   - Remove return values from pcie_port_platform_notify() and relatives (Jon Derrick)
   - Widen portdrv service type from 4 bits to 8 bits (Keith Busch)
   - Add Downstream Port Containment portdrv service type (Keith Busch)
   - Add Downstream Port Containment driver (Keith Busch)

  Resource management:
   - Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs (Alex Williamson)
   - Supply CPU physical address (not bus address) to iomem_is_exclusive() (Bjorn Helgaas)
   - alpha: Call iomem_is_exclusive() for IORESOURCE_MEM, but not IORESOURCE_IO (Bjorn Helgaas)
   - Mark Broadwell-EP Home Agent 1 as having non-compliant BARs (Prarit Bhargava)
   - Disable all BAR sizing for devices with non-compliant BARs (Prarit Bhargava)
   - Move PCI I/O space management from OF to PCI core code (Tomasz Nowicki)

  PCI device hotplug:
   - acpiphp_ibm: Avoid uninitialized variable reference (Dan Carpenter)
   - Use cached copy of PCI_EXP_SLTCAP_HPC bit (Lukas Wunner)

  Virtualization:
   - Mark Intel i40e NIC INTx masking as broken (Alex Williamson)
   - Reverse standard ACS vs device-specific ACS enabling (Alex Williamson)
   - Work around Intel Sunrise Point PCH incorrect ACS capability (Alex Williamson)

  IOMMU:
   - Add pci_add_dma_alias() to abstract implementation (Bjorn Helgaas)
   - Move informational printk to pci_add_dma_alias() (Bjorn Helgaas)
   - Add support for multiple DMA aliases (Jacek Lawrynowicz)
   - Add DMA alias quirk for mic_x200_dma (Jacek Lawrynowicz)

  Thunderbolt:
   - Fix double free of drom buffer (Andreas Noever)
   - Add Intel Thunderbolt device IDs (Lukas Wunner)
   - Fix typos and magic number (Lukas Wunner)
   - Support 1st gen Light Ridge controller (Lukas Wunner)

  Generic host bridge driver:
   - Use generic ECAM API (Jayachandran C)

  Cavium ThunderX host bridge driver:
   - Don't clobber read-only bits in bridge config registers (David Daney)
   - Use generic ECAM API (Jayachandran C)

  Freescale i.MX6 host bridge driver:
   - Use enum instead of bool for variant indicator (Andrey Smirnov)
   - Implement reset sequence for i.MX6+ (Andrey Smirnov)
   - Factor out ref clock enable (Bjorn Helgaas)
   - Add initial imx6sx support (Christoph Fritz)
   - Add reset-gpio-active-high boolean property to DT (Petr Štetiar)
   - Add DT property for link gen, default to Gen1 (Tim Harvey)
   - dts: Specify imx6qp version of PCIe core (Andrey Smirnov)
   - dts: Fix PCIe reset GPIO polarity on Toradex Apalis Ixora (Petr Štetiar)

  Marvell Armada host bridge driver:
   - add DT binding for Marvell Armada 7K/8K PCIe controller (Thomas Petazzoni)
   - Add driver for Marvell Armada 7K/8K PCIe controller (Thomas Petazzoni)

  Marvell MVEBU host bridge driver:
   - Constify mvebu_pcie_pm_ops structure (Jisheng Zhang)
   - Use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS for mvebu_pcie_pm_ops (Jisheng Zhang)

  Microsoft Hyper-V host bridge driver:
   - Report resources release after stopping the bus (Vitaly Kuznetsov)
   - Add explicit barriers to config space access (Vitaly Kuznetsov)

  Renesas R-Car host bridge driver:
   - Select PCI_MSI_IRQ_DOMAIN (Arnd Bergmann)

  Synopsys DesignWare host bridge driver:
   - Remove incorrect RC memory base/limit configuration (Gabriele Paoloni)
   - Move Root Complex setup code to dw_pcie_setup_rc() (Jisheng Zhang)

  TI Keystone host bridge driver:
   - Add error IRQ handler (Murali Karicheri)
   - Remove unnecessary goto statement (Murali Karicheri)

  Miscellaneous:
   - Fix spelling errors (Colin Ian King)"

* tag 'pci-v4.7-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
  PCI: Disable all BAR sizing for devices with non-compliant BARs
  x86/PCI: Mark Broadwell-EP Home Agent 1 as having non-compliant BARs
  PCI: Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs
  PCI, of: Move PCI I/O space management to PCI core code
  PCI: generic, thunder: Use generic ECAM API
  PCI: Provide common functions for ECAM mapping
  PCI: hv: Add explicit barriers to config space access
  PCI: Use cached copy of PCI_EXP_SLTCAP_HPC bit
  PCI: Add Downstream Port Containment driver
  PCI: Add Downstream Port Containment portdrv service type
  PCI: Widen portdrv service type from 4 bits to 8 bits
  PCI: designware: Remove incorrect RC memory base/limit configuration
  PCI: hv: Report resources release after stopping the bus
  ARM: dts: imx6qp: Specify imx6qp version of PCIe core
  PCI: imx6: Implement reset sequence for i.MX6+
  PCI: imx6: Use enum instead of bool for variant indicator
  PCI: thunder: Don't clobber read-only bits in bridge config registers
  thunderbolt: Fix double free of drom buffer
  PCI: rcar: Select PCI_MSI_IRQ_DOMAIN
  PCI: armada: Add driver for Marvell Armada 7K/8K PCIe controller
  ...
 2016-05-19 13:10:54 -07:00
Bjorn Helgaas
45604e68ed Merge branches 'pci/hotplug' and 'pci/resource' into next 
* pci/hotplug:
  PCI: Use cached copy of PCI_EXP_SLTCAP_HPC bit

* pci/resource:
  PCI: Disable all BAR sizing for devices with non-compliant BARs
  x86/PCI: Mark Broadwell-EP Home Agent 1 as having non-compliant BARs
  PCI: Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs
 2016-05-17 14:35:38 -05:00
Linus Torvalds
46c1345062 ACPI material for v4.7-rc1 
- In-kernel ACPICA code update to the upstream release 20160422
    adding support for ACPI 6.1 along with some previously missing
    bits of ACPI 6.0 support, making a fair amount of fixes and
    cleanups and reducing divergences between the upstream ACPICA
    and the in-kernel code (Bob Moore, Lv Zheng, Al Stone, Aleksey
    Makarov, Will Miles).
 
  - ACPI Generic Event Device (GED) support and a fix for it (Sinan Kaya,
    Paul Gortmaker).
 
  - INT3406 thermal driver for display thermal management and ACPI
    backlight support code reorganization related to it (Aaron Lu,
    Arnd Bergmann).
 
  - Support for exporting the value returned by the _HRV (hardware
    revision) ACPI object via sysfs (Betty Dall).
 
  - Removal of the EXPERT dependency for ACPI on ARM64 (Mark Brown).
 
  - Rework of the handling of ACPI _OSI mechanism allowing the
    _OSI("Darwin") support to be overridden from the kernel command
    line among other things (Lv Zheng, Chen Yu).
 
  - Rework of the ACPI tables override mechanism to prepare it for
    the introduction of overlays support going forward (Lv Zheng,
    Rafael Wysocki).
 
  - Fixes related to the ECDT support and module-level execution
    of AML (Lv Zheng).
 
  - ACPI PCI interrupts management update to make it work better on
    ARM64 mostly (Sinan Kaya).
 
  - ACPI SRAT handling update to make the code process all entires
    in the table order regardless of the entry type (Lukasz Anaczkowski).
 
  - EFI power off support for full-hardware ACPI platforms that don't
    support ACPI S5 (Chen Yu).
 
  - Fixes and cleanups related to the ACPI core's sysfs interface
    (Dan Carpenter, Betty Dall).
 
  - acpi_dev_present() API rework to reduce possible confusion related
    to it (Lukas Wunner).
 
  - Removal of CLK_IS_ROOT from two ACPI drivers (Stephen Boyd).
 
 /
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Merge tag 'acpi-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "The new features here are ACPI 6.1 support (and some previously
  missing bits of ACPI 6.0 support) in ACPICA and two new drivers, a
  driver for the ACPI Generic Event Device (GED) feature introduced by
  ACPI 6.1 and the INT3406 thermal driver for display thermal
  management.  Also the value returned by the _HRV (hardware revision)
  ACPI object will be exported to user space via sysfs now.

  In addition to that, ACPI on ARM64 will not depend on EXPERT any more.

  The rest is mostly fixes and cleanups and some code reorganization.

  Specifics:

   - In-kernel ACPICA code update to the upstream release 20160422
     adding support for ACPI 6.1 along with some previously missing bits
     of ACPI 6.0 support, making a fair amount of fixes and cleanups and
     reducing divergences between the upstream ACPICA and the in-kernel
     code (Bob Moore, Lv Zheng, Al Stone, Aleksey Makarov, Will Miles)

   - ACPI Generic Event Device (GED) support and a fix for it (Sinan
     Kaya, Paul Gortmaker)

   - INT3406 thermal driver for display thermal management and ACPI
     backlight support code reorganization related to it (Aaron Lu, Arnd
     Bergmann)

   - Support for exporting the value returned by the _HRV (hardware
     revision) ACPI object via sysfs (Betty Dall)

   - Removal of the EXPERT dependency for ACPI on ARM64 (Mark Brown)

   - Rework of the handling of ACPI _OSI mechanism allowing the
     _OSI("Darwin") support to be overridden from the kernel command
     line among other things (Lv Zheng, Chen Yu)

   - Rework of the ACPI tables override mechanism to prepare it for the
     introduction of overlays support going forward (Lv Zheng, Rafael
     Wysocki)

   - Fixes related to the ECDT support and module-level execution of AML
     (Lv Zheng)

   - ACPI PCI interrupts management update to make it work better on
     ARM64 mostly (Sinan Kaya)

   - ACPI SRAT handling update to make the code process all entires in
     the table order regardless of the entry type (Lukasz Anaczkowski)

   - EFI power off support for full-hardware ACPI platforms that don't
     support ACPI S5 (Chen Yu)

   - Fixes and cleanups related to the ACPI core's sysfs interface (Dan
     Carpenter, Betty Dall)

   - acpi_dev_present() API rework to reduce possible confusion related
     to it (Lukas Wunner)

   - Removal of CLK_IS_ROOT from two ACPI drivers (Stephen Boyd)"

* tag 'acpi-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (82 commits)
  ACPI / video: mark acpi_video_get_levels() inline
  Thermal / ACPI / video: add INT3406 thermal driver
  ACPI / GED: make evged.c explicitly non-modular
  ACPI / tables: Fix DSDT override mechanism
  ACPI / sysfs: fix error code in get_status()
  ACPICA: Update version to 20160422
  ACPICA: Move all ASCII utilities to a common file
  ACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support for acpi_hw_write()
  ACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support in acpi_hw_read()
  ACPICA: Executer: Introduce a set of macros to handle bit width mask generation
  ACPICA: Hardware: Add optimized access bit width support
  ACPICA: Utilities: Add ACPI_IS_ALIGNED() macro
  ACPICA: Renamed some #defined flag constants for clarity
  ACPICA: ACPI 6.0, tools/iasl: Add support for new resource descriptors
  ACPICA: ACPI 6.0: Update _BIX support for new package element
  ACPICA: ACPI 6.1: Support for new PCCT subtable
  ACPICA: Refactor evaluate_object to reduce nesting
  ACPICA: Divergence: remove unwanted spaces for typedef
  ACPI,PCI,IRQ: remove SCI penalize function
  ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init()
  ..
 2016-05-16 19:41:41 -07:00
Prarit Bhargava
da77b67195 x86/PCI: Mark Broadwell-EP Home Agent 1 as having non-compliant BARs 
Commit b894157145 ("x86/PCI: Mark Broadwell-EP Home Agent & PCU as having
non-compliant BARs") marked Home Agent 0 & PCU has having non-compliant
BARs.  Home Agent 1 also has non-compliant BARs.

Mark Home Agent 1 as having non-compliant BARs so the PCI core doesn't
touch them.

The problem with these devices is documented in the Xeon v4 specification
update:

  BDF2          PCI BARs in the Home Agent Will Return Non-Zero Values
                During Enumeration

  Problem:      During system initialization the Operating System may access
                the standard PCI BARs (Base Address Registers).  Due to
                this erratum, accesses to the Home Agent BAR registers (Bus
                1; Device 18; Function 0,4; Offsets (0x14-0x24) will return
                non-zero values.

  Implication:  The operating system may issue a warning.  Intel has not
                observed any functional failures due to this erratum.

Link: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html
Fixes: b894157145 ("x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs")
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@redhat.com>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Andi Kleen <ak@linux.intel.com>
 2016-05-16 15:47:51 -05:00
Sinan Kaya
1fcb6a813c ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init() 
acpi_irq_get_penalty is now calculating the penalty on the fly now.
No need to maintain global list of penalties or calculate them
at the init time. Removing duplicate code in acpi_irq_penalty_init.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2016-05-05 01:10:32 +02:00
Borislav Petkov
93984fbd4e x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage 
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: iommu@lists.linux-foundation.org
Cc: linux-pm@vger.kernel.org
Cc: oprofile-list@lists.sf.net
Link: http://lkml.kernel.org/r/1459801503-15600-8-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2016-04-13 11:37:41 +02:00
Adrian-Ken Rueegsegger
35a6ae07c6 x86/PCI: Refine PCI support check in pcibios_init() 
Also consider raw_pci_ext_ops when validating if a system has PCI support.
This leads to proper resource allocation via pcibios_resource_survey() in
the case where PCI config space is exclusively accessed through MMCONFIG.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-04-11 15:03:30 -05:00
Linus Torvalds
63e30271b0 PCI changes for the v4.6 merge window: 
Enumeration
     Disable IO/MEM decoding for devices with non-compliant BARs (Bjorn Helgaas)
     Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs (Bjorn Helgaas
 
   Resource management
     Mark shadow copy of VGA ROM as IORESOURCE_PCI_FIXED (Bjorn Helgaas)
     Don't assign or reassign immutable resources (Bjorn Helgaas)
     Don't enable/disable ROM BAR if we're using a RAM shadow copy (Bjorn Helgaas)
     Set ROM shadow location in arch code, not in PCI core (Bjorn Helgaas)
     Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs (Bjorn Helgaas)
     ia64: Use ioremap() instead of open-coded equivalent (Bjorn Helgaas)
     ia64: Keep CPU physical (not virtual) addresses in shadow ROM resource (Bjorn Helgaas)
     MIPS: Keep CPU physical (not virtual) addresses in shadow ROM resource (Bjorn Helgaas)
     Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY (Bjorn Helgaas)
     Don't leak memory if sysfs_create_bin_file() fails (Bjorn Helgaas)
     rcar: Remove PCI_PROBE_ONLY handling (Lorenzo Pieralisi)
     designware: Remove PCI_PROBE_ONLY handling (Lorenzo Pieralisi)
 
   Virtualization
     Wait for up to 1000ms after FLR reset (Alex Williamson)
     Support SR-IOV on any function type (Kelly Zytaruk)
     Add ACS quirk for all Cavium devices (Manish Jaggi)
 
   AER
     Rename pci_ops_aer to aer_inj_pci_ops (Bjorn Helgaas)
     Restore pci_ops pointer while calling original pci_ops (David Daney)
     Fix aer_inject error codes (Jean Delvare)
     Use dev_warn() in aer_inject (Jean Delvare)
     Log actual error causes in aer_inject (Jean Delvare)
     Log aer_inject error injections (Jean Delvare)
 
   VPD
     Prevent VPD access for buggy devices (Babu Moger)
     Move pci_read_vpd() and pci_write_vpd() close to other VPD code (Bjorn Helgaas)
     Move pci_vpd_release() from header file to pci/access.c (Bjorn Helgaas)
     Remove struct pci_vpd_ops.release function pointer (Bjorn Helgaas)
     Rename VPD symbols to remove unnecessary "pci22" (Bjorn Helgaas)
     Fold struct pci_vpd_pci22 into struct pci_vpd (Bjorn Helgaas)
     Sleep rather than busy-wait for VPD access completion (Bjorn Helgaas)
     Update VPD definitions (Hannes Reinecke)
     Allow access to VPD attributes with size 0 (Hannes Reinecke)
     Determine actual VPD size on first access (Hannes Reinecke)
 
   Generic host bridge driver
     Move structure definitions to separate header file (David Daney)
     Add pci_host_common_probe(), based on gen_pci_probe() (David Daney)
     Expose pci_host_common_probe() for use by other drivers (David Daney)
 
   Altera host bridge driver
     Fix altera_pcie_link_is_up() (Ley Foon Tan)
 
   Cavium ThunderX host bridge driver
     Add PCIe host driver for ThunderX processors (David Daney)
     Add driver for ThunderX-pass{1,2} on-chip devices (David Daney)
 
   Freescale i.MX6 host bridge driver
     Add DT bindings to configure PHY Tx driver settings (Justin Waters)
     Move imx6_pcie_reset_phy() near other PHY handling functions (Lucas Stach)
     Move PHY reset into imx6_pcie_establish_link() (Lucas Stach)
     Remove broken Gen2 workaround (Lucas Stach)
     Move link up check into imx6_pcie_wait_for_link() (Lucas Stach)
 
   Freescale Layerscape host bridge driver
     Add "fsl,ls2085a-pcie" compatible ID (Yang Shi)
 
   Intel VMD host bridge driver
     Attach VMD resources to parent domain's resource tree (Jon Derrick)
     Set bus resource start to 0 (Keith Busch)
 
   Microsoft Hyper-V host bridge driver
     Add fwnode_handle to x86 pci_sysdata (Jake Oshins)
     Look up IRQ domain by fwnode_handle (Jake Oshins)
     Add paravirtual PCI front-end for Microsoft Hyper-V VMs (Jake Oshins)
 
   NVIDIA Tegra host bridge driver
     Add pci_ops.{add,remove}_bus() callbacks (Thierry Reding)
     Implement ->{add,remove}_bus() callbacks (Thierry Reding)
     Remove unused struct tegra_pcie.num_ports field (Thierry Reding)
     Track bus -> CPU mapping (Thierry Reding)
     Remove misleading PHYS_OFFSET (Thierry Reding)
 
   Renesas R-Car host bridge driver
     Depend on ARCH_RENESAS, not ARCH_SHMOBILE (Simon Horman)
 
   Synopsys DesignWare host bridge driver
     ARC: Add PCI support (Joao Pinto)
     Add generic dw_pcie_wait_for_link() (Joao Pinto)
     Add default link up check if sub-driver doesn't override (Joao Pinto)
     Add driver for prototyping kits based on ARC SDP (Joao Pinto)
 
   TI Keystone host bridge driver
     Defer probing if devm_phy_get() returns -EPROBE_DEFER (Shawn Lin)
 
   Xilinx AXI host bridge driver
     Use of_pci_get_host_bridge_resources() to parse DT (Bharat Kumar Gogada)
     Remove dependency on ARM-specific struct hw_pci (Bharat Kumar Gogada)
     Don't call pci_fixup_irqs() on Microblaze (Bharat Kumar Gogada)
     Update Zynq binding with Microblaze node (Bharat Kumar Gogada)
     microblaze: Support generic Xilinx AXI PCIe Host Bridge IP driver (Bharat Kumar Gogada)
 
   Xilinx NWL host bridge driver
     Add support for Xilinx NWL PCIe Host Controller (Bharat Kumar Gogada)
 
   Miscellaneous
     Check device_attach() return value always (Bjorn Helgaas)
     Move pci_set_flags() from asm-generic/pci-bridge.h to linux/pci.h (Bjorn Helgaas)
     Remove includes of empty asm-generic/pci-bridge.h (Bjorn Helgaas)
     ARM64: Remove generated include of asm-generic/pci-bridge.h (Bjorn Helgaas)
     Remove empty asm-generic/pci-bridge.h (Bjorn Helgaas)
     Remove includes of asm/pci-bridge.h (Bjorn Helgaas)
     Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h (Bjorn Helgaas)
     unicore32: Remove unused HAVE_ARCH_PCI_SET_DMA_MASK definition (Bjorn Helgaas)
     Cleanup pci/pcie/Kconfig whitespace (Andreas Ziegler)
     Include pci/hotplug Kconfig directly from pci/Kconfig (Bjorn Helgaas)
     Include pci/pcie/Kconfig directly from pci/Kconfig (Bogicevic Sasa)
     frv: Remove stray pci_{alloc,free}_consistent() declaration (Christoph Hellwig)
     Move pci_dma_* helpers to common code (Christoph Hellwig)
     Add PCI_CLASS_SERIAL_USB_DEVICE definition (Heikki Krogerus)
     Add QEMU top-level IDs for (sub)vendor & device (Robin H. Johnson)
     Fix broken URL for Dell biosdevname (Naga Venkata Sai Indubhaskar Jupudi)
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Merge tag 'pci-v4.6-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "PCI changes for v4.6:

  Enumeration:
   - Disable IO/MEM decoding for devices with non-compliant BARs (Bjorn Helgaas)
   - Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs (Bjorn Helgaas

  Resource management:
   - Mark shadow copy of VGA ROM as IORESOURCE_PCI_FIXED (Bjorn Helgaas)
   - Don't assign or reassign immutable resources (Bjorn Helgaas)
   - Don't enable/disable ROM BAR if we're using a RAM shadow copy (Bjorn Helgaas)
   - Set ROM shadow location in arch code, not in PCI core (Bjorn Helgaas)
   - Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs (Bjorn Helgaas)
   - ia64: Use ioremap() instead of open-coded equivalent (Bjorn Helgaas)
   - ia64: Keep CPU physical (not virtual) addresses in shadow ROM resource (Bjorn Helgaas)
   - MIPS: Keep CPU physical (not virtual) addresses in shadow ROM resource (Bjorn Helgaas)
   - Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY (Bjorn Helgaas)
   - Don't leak memory if sysfs_create_bin_file() fails (Bjorn Helgaas)
   - rcar: Remove PCI_PROBE_ONLY handling (Lorenzo Pieralisi)
   - designware: Remove PCI_PROBE_ONLY handling (Lorenzo Pieralisi)

  Virtualization:
   - Wait for up to 1000ms after FLR reset (Alex Williamson)
   - Support SR-IOV on any function type (Kelly Zytaruk)
   - Add ACS quirk for all Cavium devices (Manish Jaggi)

  AER:
   - Rename pci_ops_aer to aer_inj_pci_ops (Bjorn Helgaas)
   - Restore pci_ops pointer while calling original pci_ops (David Daney)
   - Fix aer_inject error codes (Jean Delvare)
   - Use dev_warn() in aer_inject (Jean Delvare)
   - Log actual error causes in aer_inject (Jean Delvare)
   - Log aer_inject error injections (Jean Delvare)

  VPD:
   - Prevent VPD access for buggy devices (Babu Moger)
   - Move pci_read_vpd() and pci_write_vpd() close to other VPD code (Bjorn Helgaas)
   - Move pci_vpd_release() from header file to pci/access.c (Bjorn Helgaas)
   - Remove struct pci_vpd_ops.release function pointer (Bjorn Helgaas)
   - Rename VPD symbols to remove unnecessary "pci22" (Bjorn Helgaas)
   - Fold struct pci_vpd_pci22 into struct pci_vpd (Bjorn Helgaas)
   - Sleep rather than busy-wait for VPD access completion (Bjorn Helgaas)
   - Update VPD definitions (Hannes Reinecke)
   - Allow access to VPD attributes with size 0 (Hannes Reinecke)
   - Determine actual VPD size on first access (Hannes Reinecke)

  Generic host bridge driver:
   - Move structure definitions to separate header file (David Daney)
   - Add pci_host_common_probe(), based on gen_pci_probe() (David Daney)
   - Expose pci_host_common_probe() for use by other drivers (David Daney)

  Altera host bridge driver:
   - Fix altera_pcie_link_is_up() (Ley Foon Tan)

  Cavium ThunderX host bridge driver:
   - Add PCIe host driver for ThunderX processors (David Daney)
   - Add driver for ThunderX-pass{1,2} on-chip devices (David Daney)

  Freescale i.MX6 host bridge driver:
   - Add DT bindings to configure PHY Tx driver settings (Justin Waters)
   - Move imx6_pcie_reset_phy() near other PHY handling functions (Lucas Stach)
   - Move PHY reset into imx6_pcie_establish_link() (Lucas Stach)
   - Remove broken Gen2 workaround (Lucas Stach)
   - Move link up check into imx6_pcie_wait_for_link() (Lucas Stach)

  Freescale Layerscape host bridge driver:
   - Add "fsl,ls2085a-pcie" compatible ID (Yang Shi)

  Intel VMD host bridge driver:
   - Attach VMD resources to parent domain's resource tree (Jon Derrick)
   - Set bus resource start to 0 (Keith Busch)

  Microsoft Hyper-V host bridge driver:
   - Add fwnode_handle to x86 pci_sysdata (Jake Oshins)
   - Look up IRQ domain by fwnode_handle (Jake Oshins)
   - Add paravirtual PCI front-end for Microsoft Hyper-V VMs (Jake Oshins)

  NVIDIA Tegra host bridge driver:
   - Add pci_ops.{add,remove}_bus() callbacks (Thierry Reding)
   - Implement ->{add,remove}_bus() callbacks (Thierry Reding)
   - Remove unused struct tegra_pcie.num_ports field (Thierry Reding)
   - Track bus -> CPU mapping (Thierry Reding)
   - Remove misleading PHYS_OFFSET (Thierry Reding)

  Renesas R-Car host bridge driver:
   - Depend on ARCH_RENESAS, not ARCH_SHMOBILE (Simon Horman)

  Synopsys DesignWare host bridge driver:
   - ARC: Add PCI support (Joao Pinto)
   - Add generic dw_pcie_wait_for_link() (Joao Pinto)
   - Add default link up check if sub-driver doesn't override (Joao Pinto)
   - Add driver for prototyping kits based on ARC SDP (Joao Pinto)

  TI Keystone host bridge driver:
   - Defer probing if devm_phy_get() returns -EPROBE_DEFER (Shawn Lin)

  Xilinx AXI host bridge driver:
   - Use of_pci_get_host_bridge_resources() to parse DT (Bharat Kumar Gogada)
   - Remove dependency on ARM-specific struct hw_pci (Bharat Kumar Gogada)
   - Don't call pci_fixup_irqs() on Microblaze (Bharat Kumar Gogada)
   - Update Zynq binding with Microblaze node (Bharat Kumar Gogada)
   - microblaze: Support generic Xilinx AXI PCIe Host Bridge IP driver (Bharat Kumar Gogada)

  Xilinx NWL host bridge driver:
   - Add support for Xilinx NWL PCIe Host Controller (Bharat Kumar Gogada)

  Miscellaneous:
   - Check device_attach() return value always (Bjorn Helgaas)
   - Move pci_set_flags() from asm-generic/pci-bridge.h to linux/pci.h (Bjorn Helgaas)
   - Remove includes of empty asm-generic/pci-bridge.h (Bjorn Helgaas)
   - ARM64: Remove generated include of asm-generic/pci-bridge.h (Bjorn Helgaas)
   - Remove empty asm-generic/pci-bridge.h (Bjorn Helgaas)
   - Remove includes of asm/pci-bridge.h (Bjorn Helgaas)
   - Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h (Bjorn Helgaas)
   - unicore32: Remove unused HAVE_ARCH_PCI_SET_DMA_MASK definition (Bjorn Helgaas)
   - Cleanup pci/pcie/Kconfig whitespace (Andreas Ziegler)
   - Include pci/hotplug Kconfig directly from pci/Kconfig (Bjorn Helgaas)
   - Include pci/pcie/Kconfig directly from pci/Kconfig (Bogicevic Sasa)
   - frv: Remove stray pci_{alloc,free}_consistent() declaration (Christoph Hellwig)
   - Move pci_dma_* helpers to common code (Christoph Hellwig)
   - Add PCI_CLASS_SERIAL_USB_DEVICE definition (Heikki Krogerus)
   - Add QEMU top-level IDs for (sub)vendor & device (Robin H. Johnson)
   - Fix broken URL for Dell biosdevname (Naga Venkata Sai Indubhaskar Jupudi)"

* tag 'pci-v4.6-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (94 commits)
  PCI: Add PCI_CLASS_SERIAL_USB_DEVICE definition
  PCI: designware: Add driver for prototyping kits based on ARC SDP
  PCI: designware: Add default link up check if sub-driver doesn't override
  PCI: designware: Add generic dw_pcie_wait_for_link()
  PCI: Cleanup pci/pcie/Kconfig whitespace
  PCI: Simplify pci_create_attr() control flow
  PCI: Don't leak memory if sysfs_create_bin_file() fails
  PCI: Simplify sysfs ROM cleanup
  PCI: Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY
  MIPS: Loongson 3: Keep CPU physical (not virtual) addresses in shadow ROM resource
  MIPS: Loongson 3: Use temporary struct resource * to avoid repetition
  ia64/PCI: Keep CPU physical (not virtual) addresses in shadow ROM resource
  ia64/PCI: Use ioremap() instead of open-coded equivalent
  ia64/PCI: Use temporary struct resource * to avoid repetition
  PCI: Clean up pci_map_rom() whitespace
  PCI: Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs
  PCI: thunder: Add driver for ThunderX-pass{1,2} on-chip devices
  PCI: thunder: Add PCIe host driver for ThunderX processors
  PCI: generic: Expose pci_host_common_probe() for use by other drivers
  PCI: generic: Add pci_host_common_probe(), based on gen_pci_probe()
  ...
 2016-03-16 14:45:55 -07:00
Bjorn Helgaas
6e6f498b03 Merge branch 'pci/resource' into next 
* pci/resource:
  PCI: Simplify pci_create_attr() control flow
  PCI: Don't leak memory if sysfs_create_bin_file() fails
  PCI: Simplify sysfs ROM cleanup
  PCI: Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY
  MIPS: Loongson 3: Keep CPU physical (not virtual) addresses in shadow ROM resource
  MIPS: Loongson 3: Use temporary struct resource * to avoid repetition
  ia64/PCI: Keep CPU physical (not virtual) addresses in shadow ROM resource
  ia64/PCI: Use ioremap() instead of open-coded equivalent
  ia64/PCI: Use temporary struct resource * to avoid repetition
  PCI: Clean up pci_map_rom() whitespace
  PCI: Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs
  PCI: Set ROM shadow location in arch code, not in PCI core
  PCI: Don't enable/disable ROM BAR if we're using a RAM shadow copy
  PCI: Don't assign or reassign immutable resources
  PCI: Mark shadow copy of VGA ROM as IORESOURCE_PCI_FIXED
  x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs
  PCI: Disable IO/MEM decoding for devices with non-compliant BARs
 2016-03-15 08:56:28 -05:00
Bjorn Helgaas
c334f9c89e Merge branches 'pci/host-altera', 'pci/host-imx6', 'pci/host-keystone', 'pci/host-rcar', 'pci/host-tegra', 'pci/host-thunder', 'pci/host-vmd', 'pci/host-xilinx' and 'pci/host-xilinx-nwl' into next 
* pci/host-altera:
  PCI: altera: Fix altera_pcie_link_is_up()

* pci/host-imx6:
  PCI: imx6: Add DT bindings to configure PHY Tx driver settings

* pci/host-keystone:
  PCI: keystone: Defer probing if devm_phy_get() returns -EPROBE_DEFER

* pci/host-rcar:
  PCI: rcar: Depend on ARCH_RENESAS, not ARCH_SHMOBILE

* pci/host-tegra:
  PCI: tegra: Remove misleading PHYS_OFFSET
  PCI: tegra: Track bus -> CPU mapping
  PCI: tegra: Remove unused struct tegra_pcie.num_ports field
  PCI: tegra: Implement ->{add,remove}_bus() callbacks
  PCI: Add pci_ops.{add,remove}_bus() callbacks

* pci/host-thunder:
  PCI: thunder: Add driver for ThunderX-pass{1,2} on-chip devices
  PCI: thunder: Add PCIe host driver for ThunderX processors
  PCI: generic: Expose pci_host_common_probe() for use by other drivers
  PCI: generic: Add pci_host_common_probe(), based on gen_pci_probe()
  PCI: generic: Move structure definitions to separate header file

* pci/host-vmd:
  x86/PCI: VMD: Attach VMD resources to parent domain's resource tree
  x86/PCI: VMD: Set bus resource start to 0
  x86/PCI: VMD: Document code for maintainability

* pci/host-xilinx:
  microblaze/PCI: Support generic Xilinx AXI PCIe Host Bridge IP driver
  PCI: xilinx: Update Zynq binding with Microblaze node
  PCI: xilinx: Don't call pci_fixup_irqs() on Microblaze
  PCI: xilinx: Remove dependency on ARM-specific struct hw_pci
  PCI: xilinx: Use of_pci_get_host_bridge_resources() to parse DT

* pci/host-xilinx-nwl:
  PCI: xilinx-nwl: Add support for Xilinx NWL PCIe Host Controller
 2016-03-15 08:55:19 -05:00
Jon Derrick
2c2c5c5cd2 x86/PCI: VMD: Attach VMD resources to parent domain's resource tree 
Attach the new VMD domain's resources to the VMD device's resources.  This
allows /proc/iomem to display a more complete picture.

Before:
  c0000000-c1ffffff : 0000:5d:05.5
  c2000000-c3ffffff : 0000:5d:05.5
    c2010000-c2013fff : nvme
  c4000000-c40fffff : 0000:5d:05.5

After:
  c0000000-c1ffffff : 0000:5d:05.5
  c2000000-c3ffffff : 0000:5d:05.5
    c2000000-c3ffffff : VMD MEMBAR1
      c2000000-c22fffff : PCI Bus 10000:01
        c2000000-c200ffff : 10000:01:00.0
        c2010000-c2013fff : 10000:01:00.0
          c2010000-c2013fff : nvme
      c2300000-c24fffff : PCI Bus 10000:01
  c4000000-c40fffff : 0000:5d:05.5
    c4002000-c40fffff : VMD MEMBAR2

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
 2016-03-10 14:57:38 -06:00
Keith Busch
d068c350c0 x86/PCI: VMD: Set bus resource start to 0 
The bus always starts at 0.  Due to alignment and down-casting, this
happened to work before, but looked alarmingly incorrect in kernel logs.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-03-10 14:53:42 -06:00
Keith Busch
83cc54a608 x86/PCI: VMD: Document code for maintainability 
Comment the less obvious portion of the code for setting up memory windows,
and the platform dependency for initializing the h/w with appropriate
resources.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-03-10 14:52:13 -06:00
Bjorn Helgaas
0c0e0736ac PCI: Set ROM shadow location in arch code, not in PCI core 
IORESOURCE_ROM_SHADOW means there is a copy of a device's option ROM in
RAM.  The existence of such a copy and its location are arch-specific.
Previously the IORESOURCE_ROM_SHADOW flag was set in arch code, but the
0xC0000-0xDFFFF location was hard-coded into the PCI core.

If we're using a shadow copy in RAM, disable the ROM BAR and release the
address space it was consuming.  Move the location information from the PCI
core to the arch code that sets IORESOURCE_ROM_SHADOW.  Save the location
of the RAM copy in the struct resource for PCI_ROM_RESOURCE.

After this change, pci_map_rom() will call pci_assign_resource() and
pci_enable_rom() for these IORESOURCE_ROM_SHADOW resources, which we did
not do before.  This is safe because:

  - pci_assign_resource() will do nothing because the resource is marked
    IORESOURCE_PCI_FIXED, which means we can't move it, and

  - pci_enable_rom() will not turn on the ROM BAR's enable bit because the
    resource is marked IORESOURCE_ROM_SHADOW, which means it is in RAM
    rather than in PCI memory space.

Storing the location in the struct resource means "lspci" will show the
shadow location, not the value from the ROM BAR.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-03-08 12:14:31 -06:00
Bjorn Helgaas
63e22924f5 PCI: Mark shadow copy of VGA ROM as IORESOURCE_PCI_FIXED 
A shadow copy of an option ROM is placed by the BIOS as a fixed address.
Set IORESOURCE_PCI_FIXED to indicate that we can't move the shadow copy.
This prevents warnings like the following when we assign resources:

  BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment

This warning is emitted by pdev_sort_resources(), which already ignores
IORESOURCE_PCI_FIXED resources.

Link: http://lkml.kernel.org/r/CA+55aFyVMfTBB0oz_yx8+eQOEJnzGtCsYSj9QuhEpdZ9BHdq5A@mail.gmail.com
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-03-08 12:14:31 -06:00
Bjorn Helgaas
b894157145 x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs 
The Home Agent and PCU PCI devices in Broadwell-EP have a non-BAR register
where a BAR should be.  We don't know what the side effects of sizing the
"BAR" would be, and we don't know what address space the "BAR" might appear
to describe.

Mark these devices as having non-compliant BARs so the PCI core doesn't
touch them.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Andi Kleen <ak@linux.intel.com>
CC: stable@vger.kernel.org
 2016-03-08 12:13:57 -06:00
Linus Torvalds
a9f8094aae PCI updates for v4.5: 
Enumeration
     Revert x86 pcibios_alloc_irq() to fix regression (Bjorn Helgaas)
 
   Marvell MVEBU host bridge driver
     Restrict build to 32-bit ARM (Thierry Reding)
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Merge tag 'pci-v4.5-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "Enumeration:
    Revert x86 pcibios_alloc_irq() to fix regression (Bjorn Helgaas)

  Marvell MVEBU host bridge driver:
    Restrict build to 32-bit ARM (Thierry Reding)"

* tag 'pci-v4.5-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: mvebu: Restrict build to 32-bit ARM
  Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"
  Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"
  Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled"
 2016-02-27 12:33:42 -08:00
Bjorn Helgaas
6c777e8799 Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()" 
991de2e590 ("PCI, x86: Implement pcibios_alloc_irq() and
pcibios_free_irq()") appeared in v4.3 and helps support IOAPIC hotplug.

Олег reported that the Elcus-1553 TA1-PCI driver worked in v4.2 but not
v4.3 and bisected it to 991de2e590.  Sunjin reported that the RocketRAID
272x driver worked in v4.2 but not v4.3.  In both cases booting with
"pci=routirq" is a workaround.

I think the problem is that after 991de2e590, we no longer call
pcibios_enable_irq() for upstream bridges.  Prior to 991de2e590, when a
driver called pci_enable_device(), we recursively called
pcibios_enable_irq() for upstream bridges via pci_enable_bridge().

After 991de2e590, we call pcibios_enable_irq() from pci_device_probe()
instead of the pci_enable_device() path, which does *not* call
pcibios_enable_irq() for upstream bridges.

Revert 991de2e590 to fix these driver regressions.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 991de2e590 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Reported-and-tested-by: Олег Мороз <oleg.moroz@mcc.vniiem.ru>
Reported-by: Sunjin Yang <fan4326@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
 2016-02-27 08:52:20 -06:00
Linus Torvalds
692b8c663c Xen bug fixes for 4.5-rc5 
- Two scsiback fixes (resource leak and spurious warning).
 - Fix DMA mapping of compound pages on arm/arm64.
 - Fix some pciback regressions in MSI-X handling.
 - Fix a pcifront crash due to some uninitialize state.
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Merge tag 'for-linus-4.5-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - Two scsiback fixes (resource leak and spurious warning).

 - Fix DMA mapping of compound pages on arm/arm64.

 - Fix some pciback regressions in MSI-X handling.

 - Fix a pcifront crash due to some uninitialize state.

* tag 'for-linus-4.5-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/pcifront: Fix mysterious crashes when NUMA locality information was extracted.
  xen/pcifront: Report the errors better.
  xen/pciback: Save the number of MSI-X entries to be copied later.
  xen/pciback: Check PF instead of VF for PCI_COMMAND_MEMORY
  xen: fix potential integer overflow in queue_reply
  xen/arm: correctly handle DMA mapping of compound pages
  xen/scsiback: avoid warnings when adding multiple LUNs to a domain
  xen/scsiback: correct frontend counting
 2016-02-22 13:57:01 -08:00
Bjorn Helgaas
67b4eab91c Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed" 
Revert 811a4e6fce ("PCI: Add helpers to manage pci_dev->irq and
pci_dev->irq_managed").

This is part of reverting 991de2e590 ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 991de2e590 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
 2016-02-17 17:23:36 -06:00
Bjorn Helgaas
fe25d07887 Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled" 
Revert 8affb487d4 ("x86/PCI: Don't alloc pcibios-irq when MSI is
enabled").

This is part of reverting 991de2e590 ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 991de2e590 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
CC: Joerg Roedel <jroedel@suse.de>
 2016-02-17 12:26:33 -06:00
Konrad Rzeszutek Wilk
2cfec6a2f9 xen/pcifront: Report the errors better. 
The messages should be different depending on the type of error.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
 2016-02-15 14:21:18 +00:00
Bjorn Helgaas
5bd28338d6 PCI: Remove includes of empty asm-generic/pci-bridge.h 
include/asm-generic/pci-bridge.h is now empty, so remove every #include of
it.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will.deacon@arm.com> (arm64)
 2016-02-05 16:28:36 -06:00
Linus Torvalds
d43421565b PCI changes for the v4.5 merge window: 
Enumeration
     Simplify config space size computation (Bjorn Helgaas)
     Avoid iterating through ROM outside the resource window (Edward O'Callaghan)
     Support PCIe devices with short cfg_size (Jason S. McMullan)
     Add Netronome vendor and device IDs (Jason S. McMullan)
     Limit config space size for Netronome NFP6000 family (Jason S. McMullan)
     Add Netronome NFP4000 PF device ID (Simon Horman)
     Limit config space size for Netronome NFP4000 (Simon Horman)
     Print warnings for all invalid expansion ROM headers (Vladis Dronov)
 
   Resource management
     Fix minimum allocation address overwrite (Christoph Biedl)
 
   PCI device hotplug
     acpiphp_ibm: Fix null dereferences on null ibm_slot (Colin Ian King)
     pciehp: Always protect pciehp_disable_slot() with hotplug mutex (Guenter Roeck)
     shpchp: Constify hpc_ops structure (Julia Lawall)
     ibmphp: Remove unneeded NULL test (Julia Lawall)
 
   Power management
     Make ASPM sysfs link_state_store() consistent with link_state_show() (Andy Lutomirski)
 
   Virtualization
     Add function 1 DMA alias quirk for Lite-On/Plextor M6e/Marvell 88SS9183 (Tim Sander)
 
   MSI
     Remove empty pci_msi_init_pci_dev() (Bjorn Helgaas)
     Mark PCIe/PCI (MSI) IRQ cascade handlers as IRQF_NO_THREAD (Grygorii Strashko)
     Initialize MSI capability for all architectures (Guilherme G. Piccoli)
     Relax msi_domain_alloc() to support parentless MSI irqdomains (Liu Jiang)
 
   ARM Versatile host bridge driver
     Remove unused pci_sys_data structures (Lorenzo Pieralisi)
 
   Broadcom iProc host bridge driver
     Hide CONFIG_PCIE_IPROC (Arnd Bergmann)
     Do not use 0x in front of %pap (Dmitry V. Krivenok)
     Update iProc PCIe device tree binding (Ray Jui)
     Add PAXC interface support (Ray Jui)
     Add iProc PCIe MSI device tree binding (Ray Jui)
     Add iProc PCIe MSI support (Ray Jui)
 
   Freescale i.MX6 host bridge driver
     Use gpio_set_value_cansleep() (Fabio Estevam)
     Add support for active-low reset GPIO (Petr Štetiar)
 
   HiSilicon host bridge driver
     Add support for HiSilicon Hip06 PCIe host controllers (Gabriele Paoloni)
 
   Intel VMD host bridge driver
     Export irq_domain_set_info() for module use (Keith Busch)
     x86/PCI: Allow DMA ops specific to a PCI domain (Keith Busch)
     Use 32 bit PCI domain numbers (Keith Busch)
     Add driver for Intel Volume Management Device (VMD) (Keith Busch)
 
   Qualcomm host bridge driver
     Document PCIe devicetree bindings (Stanimir Varbanov)
     Add Qualcomm PCIe controller driver (Stanimir Varbanov)
     dts: apq8064: add PCIe devicetree node (Stanimir Varbanov)
     dts: ifc6410: enable PCIe DT node for this board (Stanimir Varbanov)
 
   Renesas R-Car host bridge driver
     Add support for R-Car H3 to pcie-rcar (Harunobu Kurokawa)
     Allow DT to override default window settings (Phil Edworthy)
     Convert to DT resource parsing API (Phil Edworthy)
     Revert "PCI: rcar: Build pcie-rcar.c only on ARM" (Phil Edworthy)
     Remove unused pci_sys_data struct from pcie-rcar (Phil Edworthy)
     Add runtime PM support to pcie-rcar (Phil Edworthy)
     Add Gen2 PHY setup to pcie-rcar (Phil Edworthy)
     Add gen2 fallback compatibility string for pci-rcar-gen2 (Simon Horman)
     Add gen2 fallback compatibility string for pcie-rcar (Simon Horman)
 
   Synopsys DesignWare host bridge driver
     Simplify control flow (Bjorn Helgaas)
     Make config accessor override checking symmetric (Bjorn Helgaas)
     Ensure ATU is enabled before IO/conf space accesses (Stanimir Varbanov)
 
   Miscellaneous
     Add of_pci_get_host_bridge_resources() stub (Arnd Bergmann)
     Check for PCI_HEADER_TYPE_BRIDGE equality, not bitmask (Bjorn Helgaas)
     Fix all whitespace issues (Bogicevic Sasa)
     x86/PCI: Simplify pci_bios_{read,write} (Geliang Tang)
     Use to_pci_dev() instead of open-coding it (Geliang Tang)
     Use kobj_to_dev() instead of open-coding it (Geliang Tang)
     Use list_for_each_entry() to simplify code (Geliang Tang)
     Fix typos in <linux/msi.h> (Thomas Petazzoni)
     x86/PCI: Clarify AMD Fam10h config access restrictions comment (Tomasz Nowicki)
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Merge tag 'pci-v4.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "PCI changes for the v4.5 merge window:

  Enumeration:
   - Simplify config space size computation (Bjorn Helgaas)
   - Avoid iterating through ROM outside the resource window (Edward O'Callaghan)
   - Support PCIe devices with short cfg_size (Jason S. McMullan)
   - Add Netronome vendor and device IDs (Jason S. McMullan)
   - Limit config space size for Netronome NFP6000 family (Jason S. McMullan)
   - Add Netronome NFP4000 PF device ID (Simon Horman)
   - Limit config space size for Netronome NFP4000 (Simon Horman)
   - Print warnings for all invalid expansion ROM headers (Vladis Dronov)

  Resource management:
   - Fix minimum allocation address overwrite (Christoph Biedl)

  PCI device hotplug:
   - acpiphp_ibm: Fix null dereferences on null ibm_slot (Colin Ian King)
   - pciehp: Always protect pciehp_disable_slot() with hotplug mutex (Guenter Roeck)
   - shpchp: Constify hpc_ops structure (Julia Lawall)
   - ibmphp: Remove unneeded NULL test (Julia Lawall)

  Power management:
   - Make ASPM sysfs link_state_store() consistent with link_state_show() (Andy Lutomirski)

  Virtualization
   - Add function 1 DMA alias quirk for Lite-On/Plextor M6e/Marvell 88SS9183 (Tim Sander)

  MSI:
   - Remove empty pci_msi_init_pci_dev() (Bjorn Helgaas)
   - Mark PCIe/PCI (MSI) IRQ cascade handlers as IRQF_NO_THREAD (Grygorii Strashko)
   - Initialize MSI capability for all architectures (Guilherme G. Piccoli)
   - Relax msi_domain_alloc() to support parentless MSI irqdomains (Liu Jiang)

  ARM Versatile host bridge driver:
   - Remove unused pci_sys_data structures (Lorenzo Pieralisi)

  Broadcom iProc host bridge driver:
   - Hide CONFIG_PCIE_IPROC (Arnd Bergmann)
   - Do not use 0x in front of %pap (Dmitry V. Krivenok)
   - Update iProc PCIe device tree binding (Ray Jui)
   - Add PAXC interface support (Ray Jui)
   - Add iProc PCIe MSI device tree binding (Ray Jui)
   - Add iProc PCIe MSI support (Ray Jui)

  Freescale i.MX6 host bridge driver:
   - Use gpio_set_value_cansleep() (Fabio Estevam)
   - Add support for active-low reset GPIO (Petr Štetiar)

  HiSilicon host bridge driver:
   - Add support for HiSilicon Hip06 PCIe host controllers (Gabriele Paoloni)

  Intel VMD host bridge driver:
   - Export irq_domain_set_info() for module use (Keith Busch)
   - x86/PCI: Allow DMA ops specific to a PCI domain (Keith Busch)
   - Use 32 bit PCI domain numbers (Keith Busch)
   - Add driver for Intel Volume Management Device (VMD) (Keith Busch)

  Qualcomm host bridge driver:
   - Document PCIe devicetree bindings (Stanimir Varbanov)
   - Add Qualcomm PCIe controller driver (Stanimir Varbanov)
   - dts: apq8064: add PCIe devicetree node (Stanimir Varbanov)
   - dts: ifc6410: enable PCIe DT node for this board (Stanimir Varbanov)

  Renesas R-Car host bridge driver:
   - Add support for R-Car H3 to pcie-rcar (Harunobu Kurokawa)
   - Allow DT to override default window settings (Phil Edworthy)
   - Convert to DT resource parsing API (Phil Edworthy)
   - Revert "PCI: rcar: Build pcie-rcar.c only on ARM" (Phil Edworthy)
   - Remove unused pci_sys_data struct from pcie-rcar (Phil Edworthy)
   - Add runtime PM support to pcie-rcar (Phil Edworthy)
   - Add Gen2 PHY setup to pcie-rcar (Phil Edworthy)
   - Add gen2 fallback compatibility string for pci-rcar-gen2 (Simon Horman)
   - Add gen2 fallback compatibility string for pcie-rcar (Simon Horman)

  Synopsys DesignWare host bridge driver:
   - Simplify control flow (Bjorn Helgaas)
   - Make config accessor override checking symmetric (Bjorn Helgaas)
   - Ensure ATU is enabled before IO/conf space accesses (Stanimir Varbanov)

  Miscellaneous:
   - Add of_pci_get_host_bridge_resources() stub (Arnd Bergmann)
   - Check for PCI_HEADER_TYPE_BRIDGE equality, not bitmask (Bjorn Helgaas)
   - Fix all whitespace issues (Bogicevic Sasa)
   - x86/PCI: Simplify pci_bios_{read,write} (Geliang Tang)
   - Use to_pci_dev() instead of open-coding it (Geliang Tang)
   - Use kobj_to_dev() instead of open-coding it (Geliang Tang)
   - Use list_for_each_entry() to simplify code (Geliang Tang)
   - Fix typos in <linux/msi.h> (Thomas Petazzoni)
   - x86/PCI: Clarify AMD Fam10h config access restrictions comment (Tomasz Nowicki)"

* tag 'pci-v4.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (58 commits)
  PCI: Add function 1 DMA alias quirk for Lite-On/Plextor M6e/Marvell 88SS9183
  PCI: Limit config space size for Netronome NFP4000
  PCI: Add Netronome NFP4000 PF device ID
  x86/PCI: Add driver for Intel Volume Management Device (VMD)
  PCI/AER: Use 32 bit PCI domain numbers
  x86/PCI: Allow DMA ops specific to a PCI domain
  irqdomain: Export irq_domain_set_info() for module use
  PCI: host: Add of_pci_get_host_bridge_resources() stub
  genirq/MSI: Relax msi_domain_alloc() to support parentless MSI irqdomains
  PCI: rcar: Add Gen2 PHY setup to pcie-rcar
  PCI: rcar: Add runtime PM support to pcie-rcar
  PCI: designware: Make config accessor override checking symmetric
  PCI: ibmphp: Remove unneeded NULL test
  ARM: dts: ifc6410: enable PCIe DT node for this board
  ARM: dts: apq8064: add PCIe devicetree node
  PCI: hotplug: Use list_for_each_entry() to simplify code
  PCI: rcar: Remove unused pci_sys_data struct from pcie-rcar
  PCI: hisi: Add support for HiSilicon Hip06 PCIe host controllers
  PCI: Avoid iterating through memory outside the resource window
  PCI: acpiphp_ibm: Fix null dereferences on null ibm_slot
  ...
 2016-01-21 11:52:16 -08:00
Bjorn Helgaas
3a6384ba10 Merge branch 'pci/host-vmd' into next 
* pci/host-vmd:
  x86/PCI: Add driver for Intel Volume Management Device (VMD)
  PCI/AER: Use 32 bit PCI domain numbers
  x86/PCI: Allow DMA ops specific to a PCI domain
  irqdomain: Export irq_domain_set_info() for module use
  genirq/MSI: Relax msi_domain_alloc() to support parentless MSI irqdomains
 2016-01-15 16:14:39 -06:00
Keith Busch
185a383ada x86/PCI: Add driver for Intel Volume Management Device (VMD) 
The Intel Volume Management Device (VMD) is a Root Complex Integrated
Endpoint that acts as a host bridge to a secondary PCIe domain.  BIOS can
reassign one or more Root Ports to appear within a VMD domain instead of
the primary domain.  The immediate benefit is that additional PCIe domains
allow more than 256 buses in a system by letting bus numbers be reused
across different domains.

VMD domains do not define ACPI _SEG, so to avoid domain clashing with host
bridges defining this segment, VMD domains start at 0x10000, which is
greater than the highest possible 16-bit ACPI defined _SEG.

This driver enumerates and enables the domain using the root bus
configuration interface provided by the PCI subsystem.  The driver provides
configuration space accessor functions (pci_ops), bus and memory resources,
an MSI IRQ domain with irq_chip implementation, and DMA operations
necessary to use devices through the VMD endpoint's interface.

VMD routes I/O as follows:

   1) Configuration Space: BAR 0 ("CFGBAR") of VMD provides the base
   address and size for configuration space register access to VMD-owned
   root ports.  It works similarly to MMCONFIG for extended configuration
   space.  Bus numbering is independent and does not conflict with the
   primary domain.

   2) MMIO Space: BARs 2 and 4 ("MEMBAR1" and "MEMBAR2") of VMD provide the
   base address, size, and type for MMIO register access.  These addresses
   are not translated by VMD hardware; they are simply reservations to be
   distributed to root ports' memory base/limit registers and subdivided
   among devices downstream.

   3) DMA: To interact appropriately with an IOMMU, the source ID DMA read
   and write requests are translated to the bus-device-function of the VMD
   endpoint.  Otherwise, DMA operates normally without VMD-specific address
   translation.

   4) Interrupts: Part of VMD's BAR 4 is reserved for VMD's MSI-X Table and
   PBA.  MSIs from VMD domain devices and ports are remapped to appear as
   if they were issued using one of VMD's MSI-X table entries.  Each MSI
   and MSI-X address of VMD-owned devices and ports has a special format
   where the address refers to specific entries in the VMD's MSI-X table.
   As with DMA, the interrupt source ID is translated to VMD's
   bus-device-function.

   The driver provides its own MSI and MSI-X configuration functions
   specific to how MSI messages are used within the VMD domain, and
   provides an irq_chip for independent IRQ allocation to relay interrupts
   from VMD's interrupt handler to the appropriate device driver's handler.

   5) Errors: PCIe error message are intercepted by the root ports normally
   (e.g., AER), except with VMD, system errors (i.e., firmware first) are
   disabled by default.  AER and hotplug interrupts are translated in the
   same way as endpoint interrupts.

   6) VMD does not support INTx interrupts or IO ports.  Devices or drivers
   requiring these features should either not be placed below VMD-owned
   root ports, or VMD should be disabled by BIOS for such endpoints.

[bhelgaas: add VMD BAR #defines, factor out vmd_cfg_addr(), rework VMD
resource setup, whitespace, changelog]
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de> (IRQ-related parts)
 2016-01-15 13:54:55 -06:00
Keith Busch
d9c3d6ff22 x86/PCI: Allow DMA ops specific to a PCI domain 
The Intel Volume Management Device (VMD) is a PCIe endpoint that acts as a
host bridge to another PCI domain.  When devices below the VMD perform DMA,
the VMD replaces their DMA source IDs with its own source ID.  Therefore,
those devices require special DMA ops.

Add interfaces to allow the VMD driver to set up dma_ops for the devices
below it.

[bhelgaas: remove "extern", add "static", changelog]
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2016-01-15 13:54:55 -06:00
Geliang Tang
96ae6469ba x86/PCI: Simplify pci_bios_{read,write} 
There is some repetitive code in the switch/case statements in
pci_bios_read() and pci_bios_write().  Factor out the BIOS function
IDs and the result widths to simplify the code.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
 2015-12-10 19:38:07 -06:00
Rafael J. Wysocki
c09c9dd2e9 Merge branches 'acpi-pci' and 'pm-pci' 
* acpi-pci:
  x86/PCI/ACPI: Fix regression caused by commit 4d6b4e69a2

* pm-pci:
  PCI / PM: Tune down retryable runtime suspend error messages
 2015-12-04 14:01:02 +01:00
Liu Jiang
727ae8be30 x86/PCI/ACPI: Fix regression caused by commit 4d6b4e69a2 
Commit 4d6b4e69a2 ("x86/PCI/ACPI: Use common interface to support
PCI host bridge") converted x86 to use the common interface
acpi_pci_root_create, but the conversion missed on code piece in
arch/x86/pci/bus_numa.c, which causes regression on some legacy
AMD platforms as reported by Arthur Marsh <arthur.marsh@internode.on.net>.
The root causes is that acpi_pci_root_create() fails to insert
host bridge resources into iomem_resource/ioport_resource because
x86_pci_root_bus_resources() has already inserted those resources.
So change x86_pci_root_bus_resources() to not insert resources into
iomem_resource/ioport_resource.

Fixes: 4d6b4e69a2 ("x86/PCI/ACPI: Use common interface to support PCI host bridge")
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reported-and-tested-by: Arthur Marsh <arthur.marsh@internode.on.net>
Reported-and-tested-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Reported-and-tested-by: Keith Busch <keith.busch@intel.com>
Reported-and-tested-by: Hans de Bruin <jmdebruin@xmsnet.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2015-12-02 02:30:15 +01:00
Linus Torvalds
3c87b79188 PCI changes for the v4.4 merge window: 
Resource management
     Add support for Enhanced Allocation devices (Sean O. Stalley)
     Add Enhanced Allocation register entries (Sean O. Stalley)
     Handle IORESOURCE_PCI_FIXED when sizing resources (David Daney)
     Handle IORESOURCE_PCI_FIXED when assigning resources (David Daney)
     Handle Enhanced Allocation capability for SR-IOV devices (David Daney)
     Clear IORESOURCE_UNSET when reverting to firmware-assigned address (Bjorn Helgaas)
     Make Enhanced Allocation bitmasks more obvious (Bjorn Helgaas)
     Expand Enhanced Allocation BAR output (Bjorn Helgaas)
     Add of_pci_check_probe_only to parse "linux,pci-probe-only" (Marc Zyngier)
     Fix lookup of linux,pci-probe-only property (Marc Zyngier)
     Add sparc mem64 resource parsing for root bus (Yinghai Lu)
 
   PCI device hotplug
     pciehp: Queue power work requests in dedicated function (Guenter Roeck)
 
   Driver binding
     Add builtin_pci_driver() to avoid registration boilerplate (Paul Gortmaker)
 
   Virtualization
     Set SR-IOV NumVFs to zero after enumeration (Alexander Duyck)
     Remove redundant validation of SR-IOV offset/stride registers (Alexander Duyck)
     Remove VFs in reverse order if virtfn_add() fails (Alexander Duyck)
     Reorder pcibios_sriov_disable() (Alexander Duyck)
     Wait 1 second between disabling VFs and clearing NumVFs (Alexander Duyck)
     Fix sriov_enable() error path for pcibios_enable_sriov() failures (Alexander Duyck)
     Enable SR-IOV ARI Capable Hierarchy before reading TotalVFs (Ben Shelton)
     Don't try to restore VF BARs (Wei Yang)
 
   MSI
     Don't alloc pcibios-irq when MSI is enabled (Joerg Roedel)
     Add msi_controller setup_irqs() method for special multivector setup (Lucas Stach)
     Export all remapped MSIs to sysfs attributes (Romain Bezut)
     Disable MSI on SiS 761 (Ondrej Zary)
 
   AER
     Clear error status registers during enumeration and restore (Taku Izumi)
 
   Generic host bridge driver
     Fix lookup of linux,pci-probe-only property (Marc Zyngier)
     Allow multiple hosts with different map_bus() methods (David Daney)
     Pass starting bus number to pci_scan_root_bus() (David Daney)
     Fix address window calculation for non-zero starting bus (David Daney)
 
   Altera host bridge driver
     Add msi.h to ARM Kbuild (Ley Foon Tan)
     Add Altera PCIe host controller driver (Ley Foon Tan)
     Add Altera PCIe MSI driver (Ley Foon Tan)
 
   APM X-Gene host bridge driver
     Remove msi_controller assignment (Duc Dang)
 
   Broadcom iProc host bridge driver
     Fix header comment "Corporation" misspelling (Florian Fainelli)
     Fix code comment to match code (Ray Jui)
     Remove unused struct iproc_pcie.irqs[] (Ray Jui)
     Call pci_fixup_irqs() for ARM64 as well as ARM (Ray Jui)
     Fix PCIe reset logic (Ray Jui)
     Improve link detection logic (Ray Jui)
     Update PCIe device tree bindings (Ray Jui)
     Add outbound mapping support (Ray Jui)
 
   Freescale i.MX6 host bridge driver
     Return real error code from imx6_add_pcie_port() (Fabio Estevam)
     Add PCIE_PHY_RX_ASIC_OUT_VALID definition (Fabio Estevam)
 
   Freescale Layerscape host bridge driver
     Remove ls_pcie_establish_link() (Minghuan Lian)
     Ignore PCIe controllers in Endpoint mode (Minghuan Lian)
     Factor out SCFG related function (Minghuan Lian)
     Update ls_add_pcie_port() (Minghuan Lian)
     Remove unused fields from struct ls_pcie (Minghuan Lian)
     Add support for LS1043a and LS2080a (Minghuan Lian)
     Add ls_pcie_msi_host_init() (Minghuan Lian)
 
   HiSilicon host bridge driver
     Add HiSilicon SoC Hip05 PCIe driver (Zhou Wang)
 
   Marvell MVEBU host bridge driver
     Return zero for reserved or unimplemented config space (Russell King)
     Use exact config access size; don't read/modify/write (Russell King)
     Use of_get_available_child_count() (Russell King)
     Use for_each_available_child_of_node() to walk child nodes (Russell King)
     Report full node name when reporting a DT error (Russell King)
     Use port->name rather than "PCIe%d.%d" (Russell King)
     Move port parsing and resource claiming to  separate function (Russell King)
     Fix memory leaks and refcount leaks (Russell King)
     Split port parsing and resource claiming from  port setup (Russell King)
     Use gpio_set_value_cansleep() (Russell King)
     Use devm_kcalloc() to allocate an array (Russell King)
     Use gpio_desc to carry around gpio (Russell King)
     Improve clock/reset handling (Russell King)
     Add PCI Express root complex capability block (Russell King)
     Remove code restricting accesses to slot 0 (Russell King)
 
   NVIDIA Tegra host bridge driver
     Wrap static pgprot_t initializer with __pgprot() (Ard Biesheuvel)
 
   Renesas R-Car host bridge driver
     Build pci-rcar-gen2.c only on ARM (Geert Uytterhoeven)
     Build pcie-rcar.c only on ARM (Geert Uytterhoeven)
     Make PCI aware of the I/O resources (Phil Edworthy)
     Remove dependency on ARM-specific struct hw_pci (Phil Edworthy)
     Set root bus nr to that provided in DT (Phil Edworthy)
     Fix I/O offset for multiple host bridges (Phil Edworthy)
 
   ST Microelectronics SPEAr13xx host bridge driver
     Fix dw_pcie_cfg_read/write() usage (Gabriele Paoloni)
 
   Synopsys DesignWare host bridge driver
     Make "clocks" and "clock-names" optional DT properties (Bhupesh Sharma)
     Use exact access size in dw_pcie_cfg_read() (Gabriele Paoloni)
     Simplify dw_pcie_cfg_read/write() interfaces (Gabriele Paoloni)
     Require config accesses to be naturally aligned (Gabriele Paoloni)
     Make "num-lanes" an optional DT property (Gabriele Paoloni)
     Move calculation of bus addresses to DRA7xx (Gabriele Paoloni)
     Replace ARM pci_sys_data->align_resource with global function pointer (Gabriele Paoloni)
     Factor out MSI msg setup (Lucas Stach)
     Implement multivector MSI IRQ setup (Lucas Stach)
     Make get_msi_addr() return phys_addr_t, not u32 (Lucas Stach)
     Set up high part of MSI target address (Lucas Stach)
     Fix PORT_LOGIC_LINK_WIDTH_MASK (Zhou Wang)
     Revert "PCI: designware: Program ATU with untranslated address" (Zhou Wang)
     Use of_pci_get_host_bridge_resources() to parse DT (Zhou Wang)
     Make driver arch-agnostic (Zhou Wang)
 
   Miscellaneous
     Make x86 pci_subsys_init() static (Alexander Kuleshov)
     Turn off Request Attributes to avoid Chelsio T5 Completion erratum (Hariprasad Shenai)
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Merge tag 'pci-v4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Resource management:
   - Add support for Enhanced Allocation devices (Sean O. Stalley)
   - Add Enhanced Allocation register entries (Sean O. Stalley)
   - Handle IORESOURCE_PCI_FIXED when sizing resources (David Daney)
   - Handle IORESOURCE_PCI_FIXED when assigning resources (David Daney)
   - Handle Enhanced Allocation capability for SR-IOV devices (David Daney)
   - Clear IORESOURCE_UNSET when reverting to firmware-assigned address (Bjorn Helgaas)
   - Make Enhanced Allocation bitmasks more obvious (Bjorn Helgaas)
   - Expand Enhanced Allocation BAR output (Bjorn Helgaas)
   - Add of_pci_check_probe_only to parse "linux,pci-probe-only" (Marc Zyngier)
   - Fix lookup of linux,pci-probe-only property (Marc Zyngier)
   - Add sparc mem64 resource parsing for root bus (Yinghai Lu)

  PCI device hotplug:
   - pciehp: Queue power work requests in dedicated function (Guenter Roeck)

  Driver binding:
   - Add builtin_pci_driver() to avoid registration boilerplate (Paul Gortmaker)

  Virtualization:
   - Set SR-IOV NumVFs to zero after enumeration (Alexander Duyck)
   - Remove redundant validation of SR-IOV offset/stride registers (Alexander Duyck)
   - Remove VFs in reverse order if virtfn_add() fails (Alexander Duyck)
   - Reorder pcibios_sriov_disable() (Alexander Duyck)
   - Wait 1 second between disabling VFs and clearing NumVFs (Alexander Duyck)
   - Fix sriov_enable() error path for pcibios_enable_sriov() failures (Alexander Duyck)
   - Enable SR-IOV ARI Capable Hierarchy before reading TotalVFs (Ben Shelton)
   - Don't try to restore VF BARs (Wei Yang)

  MSI:
   - Don't alloc pcibios-irq when MSI is enabled (Joerg Roedel)
   - Add msi_controller setup_irqs() method for special multivector setup (Lucas Stach)
   - Export all remapped MSIs to sysfs attributes (Romain Bezut)
   - Disable MSI on SiS 761 (Ondrej Zary)

  AER:
   - Clear error status registers during enumeration and restore (Taku Izumi)

  Generic host bridge driver:
   - Fix lookup of linux,pci-probe-only property (Marc Zyngier)
   - Allow multiple hosts with different map_bus() methods (David Daney)
   - Pass starting bus number to pci_scan_root_bus() (David Daney)
   - Fix address window calculation for non-zero starting bus (David Daney)

  Altera host bridge driver:
   - Add msi.h to ARM Kbuild (Ley Foon Tan)
   - Add Altera PCIe host controller driver (Ley Foon Tan)
   - Add Altera PCIe MSI driver (Ley Foon Tan)

  APM X-Gene host bridge driver:
   - Remove msi_controller assignment (Duc Dang)

  Broadcom iProc host bridge driver:
   - Fix header comment "Corporation" misspelling (Florian Fainelli)
   - Fix code comment to match code (Ray Jui)
   - Remove unused struct iproc_pcie.irqs[] (Ray Jui)
   - Call pci_fixup_irqs() for ARM64 as well as ARM (Ray Jui)
   - Fix PCIe reset logic (Ray Jui)
   - Improve link detection logic (Ray Jui)
   - Update PCIe device tree bindings (Ray Jui)
   - Add outbound mapping support (Ray Jui)

  Freescale i.MX6 host bridge driver:
   - Return real error code from imx6_add_pcie_port() (Fabio Estevam)
   - Add PCIE_PHY_RX_ASIC_OUT_VALID definition (Fabio Estevam)

  Freescale Layerscape host bridge driver:
   - Remove ls_pcie_establish_link() (Minghuan Lian)
   - Ignore PCIe controllers in Endpoint mode (Minghuan Lian)
   - Factor out SCFG related function (Minghuan Lian)
   - Update ls_add_pcie_port() (Minghuan Lian)
   - Remove unused fields from struct ls_pcie (Minghuan Lian)
   - Add support for LS1043a and LS2080a (Minghuan Lian)
   - Add ls_pcie_msi_host_init() (Minghuan Lian)

  HiSilicon host bridge driver:
   - Add HiSilicon SoC Hip05 PCIe driver (Zhou Wang)

  Marvell MVEBU host bridge driver:
   - Return zero for reserved or unimplemented config space (Russell King)
   - Use exact config access size; don't read/modify/write (Russell King)
   - Use of_get_available_child_count() (Russell King)
   - Use for_each_available_child_of_node() to walk child nodes (Russell King)
   - Report full node name when reporting a DT error (Russell King)
   - Use port->name rather than "PCIe%d.%d" (Russell King)
   - Move port parsing and resource claiming to  separate function (Russell King)
   - Fix memory leaks and refcount leaks (Russell King)
   - Split port parsing and resource claiming from  port setup (Russell King)
   - Use gpio_set_value_cansleep() (Russell King)
   - Use devm_kcalloc() to allocate an array (Russell King)
   - Use gpio_desc to carry around gpio (Russell King)
   - Improve clock/reset handling (Russell King)
   - Add PCI Express root complex capability block (Russell King)
   - Remove code restricting accesses to slot 0 (Russell King)

  NVIDIA Tegra host bridge driver:
   - Wrap static pgprot_t initializer with __pgprot() (Ard Biesheuvel)

  Renesas R-Car host bridge driver:
   - Build pci-rcar-gen2.c only on ARM (Geert Uytterhoeven)
   - Build pcie-rcar.c only on ARM (Geert Uytterhoeven)
   - Make PCI aware of the I/O resources (Phil Edworthy)
   - Remove dependency on ARM-specific struct hw_pci (Phil Edworthy)
   - Set root bus nr to that provided in DT (Phil Edworthy)
   - Fix I/O offset for multiple host bridges (Phil Edworthy)

  ST Microelectronics SPEAr13xx host bridge driver:
   - Fix dw_pcie_cfg_read/write() usage (Gabriele Paoloni)

  Synopsys DesignWare host bridge driver:
   - Make "clocks" and "clock-names" optional DT properties (Bhupesh Sharma)
   - Use exact access size in dw_pcie_cfg_read() (Gabriele Paoloni)
   - Simplify dw_pcie_cfg_read/write() interfaces (Gabriele Paoloni)
   - Require config accesses to be naturally aligned (Gabriele Paoloni)
   - Make "num-lanes" an optional DT property (Gabriele Paoloni)
   - Move calculation of bus addresses to DRA7xx (Gabriele Paoloni)
   - Replace ARM pci_sys_data->align_resource with global function pointer (Gabriele Paoloni)
   - Factor out MSI msg setup (Lucas Stach)
   - Implement multivector MSI IRQ setup (Lucas Stach)
   - Make get_msi_addr() return phys_addr_t, not u32 (Lucas Stach)
   - Set up high part of MSI target address (Lucas Stach)
   - Fix PORT_LOGIC_LINK_WIDTH_MASK (Zhou Wang)
   - Revert "PCI: designware: Program ATU with untranslated address" (Zhou Wang)
   - Use of_pci_get_host_bridge_resources() to parse DT (Zhou Wang)
   - Make driver arch-agnostic (Zhou Wang)

  Miscellaneous:
   - Make x86 pci_subsys_init() static (Alexander Kuleshov)
   - Turn off Request Attributes to avoid Chelsio T5 Completion erratum (Hariprasad Shenai)"

* tag 'pci-v4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (94 commits)
  PCI: altera: Add Altera PCIe MSI driver
  PCI: hisi: Add HiSilicon SoC Hip05 PCIe driver
  PCI: layerscape: Add ls_pcie_msi_host_init()
  PCI: layerscape: Add support for LS1043a and LS2080a
  PCI: layerscape: Remove unused fields from struct ls_pcie
  PCI: layerscape: Update ls_add_pcie_port()
  PCI: layerscape: Factor out SCFG related function
  PCI: layerscape: Ignore PCIe controllers in Endpoint mode
  PCI: layerscape: Remove ls_pcie_establish_link()
  PCI: designware: Make "clocks" and "clock-names" optional DT properties
  PCI: designware: Make driver arch-agnostic
  ARM/PCI: Replace pci_sys_data->align_resource with global function pointer
  PCI: designware: Use of_pci_get_host_bridge_resources() to parse DT
  Revert "PCI: designware: Program ATU with untranslated address"
  PCI: designware: Move calculation of bus addresses to DRA7xx
  PCI: designware: Make "num-lanes" an optional DT property
  PCI: designware: Require config accesses to be naturally aligned
  PCI: designware: Simplify dw_pcie_cfg_read/write() interfaces
  PCI: designware: Use exact access size in dw_pcie_cfg_read()
  PCI: spear: Fix dw_pcie_cfg_read/write() usage
  ...
 2015-11-06 11:29:53 -08:00
Bjorn Helgaas
1f9a30ec2a Merge branches 'pci/aer', 'pci/hotplug', 'pci/misc', 'pci/msi', 'pci/resource' and 'pci/virtualization' into next 
* pci/aer:
  PCI/AER: Clear error status registers during enumeration and restore

* pci/hotplug:
  PCI: pciehp: Queue power work requests in dedicated function

* pci/misc:
  PCI: Turn off Request Attributes to avoid Chelsio T5 Completion erratum
  x86/PCI: Make pci_subsys_init() static
  PCI: Add builtin_pci_driver() to avoid registration boilerplate
  PCI: Remove unnecessary "if" statement

* pci/msi:
  x86/PCI: Don't alloc pcibios-irq when MSI is enabled
  PCI/MSI: Export all remapped MSIs to sysfs attributes
  PCI: Disable MSI on SiS 761

* pci/resource:
  sparc/PCI: Add mem64 resource parsing for root bus
  PCI: Expand Enhanced Allocation BAR output
  PCI: Make Enhanced Allocation bitmasks more obvious
  PCI: Handle Enhanced Allocation capability for SR-IOV devices
  PCI: Add support for Enhanced Allocation devices
  PCI: Add Enhanced Allocation register entries
  PCI: Handle IORESOURCE_PCI_FIXED when assigning resources
  PCI: Handle IORESOURCE_PCI_FIXED when sizing resources
  PCI: Clear IORESOURCE_UNSET when reverting to firmware-assigned address

* pci/virtualization:
  PCI: Fix sriov_enable() error path for pcibios_enable_sriov() failures
  PCI: Wait 1 second between disabling VFs and clearing NumVFs
  PCI: Reorder pcibios_sriov_disable()
  PCI: Remove VFs in reverse order if virtfn_add() fails
  PCI: Remove redundant validation of SR-IOV offset/stride registers
  PCI: Set SR-IOV NumVFs to zero after enumeration
  PCI: Enable SR-IOV ARI Capable Hierarchy before reading TotalVFs
  PCI: Don't try to restore VF BARs
 2015-11-02 15:57:03 -06:00
Joerg Roedel
8affb487d4 x86/PCI: Don't alloc pcibios-irq when MSI is enabled 
The pcibios-irq and MSI both use dev->irq to store the IRQ number.  While
the MSI code checks for that and frees the pcibios-irq before overwriting
dev->irq, the pcibios_alloc_irq() function does not.

Usually this is not a problem, as the pcibios-irq is allocated before probe
time of the device and the MSI IRQ is allocted from the driver's probe
path.

But there are PCI devices handled by the core kernel and not by a standard
PCI driver, like the AMD IOMMU for example.  For the AMD IOMMU a normal PCI
device driver does not make sense, because a driver can be forcibly unbound
from its device, which is not a good idea for an IOMMU.

Nevertheless the PCI core code tries to match the PCI device implementing
the AMD IOMMU against drivers, and allocates/frees a pcibios IRQ every time
it tries out a new driver.  This overwrites the dev->irq field set by
pci_enable_msi() and sets it to 0 in the end (because the probe fails and
the pcibios-irq is freed again).

On suspend/resume this breaks the kernel, because the IRQ descriptor for
IRQ 0 is NULL.

Fix this by not allocating a pcibios-irq when MSI is already active.  This
also has the benefit, that a device claimed by the core kernel can not be
probed by a PCI driver later.

Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
 2015-10-21 11:19:25 -05:00
Jiang Liu
4d6b4e69a2 x86/PCI/ACPI: Use common interface to support PCI host bridge 
Use common interface to simplify ACPI PCI host bridge implementation.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2015-10-16 22:18:52 +02:00
Jiang Liu
a3669868d9 ACPI/PCI: Reset acpi_root_dev->domain to 0 when pci_ignore_seg is set 
Reset acpi_root_dev->domain to 0 when pci_ignore_seg is set to keep
consistence between ACPI PCI root device and PCI host bridge device.

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2015-10-16 22:18:52 +02:00
Alexander Kuleshov
68d0d97948 x86/PCI: Make pci_subsys_init() static 
The pci_subsys_init() is a subsys_initcall that can be declared static.

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2015-10-09 18:34:48 -05:00
Bjorn Helgaas
237865f195 PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code" 
Revert dff22d2054 ("PCI: Call pci_read_bridge_bases() from core instead
of arch code").

Reading PCI bridge windows is not arch-specific in itself, but there is PCI
core code that doesn't work correctly if we read them too early.  For
example, Hannes found this case on an ARM Freescale i.mx6 board:

  pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff]
  pci 0000:00:00.0: PCI bridge to [bus 01-ff]
  pci 0000:00:00.0: BAR 8: no space for [mem size 0x01000000] (mem window)
  pci 0000:01:00.0: BAR 2: failed to assign [mem size 0x00200000]
  pci 0000:01:00.0: BAR 1: failed to assign [mem size 0x00004000]
  pci 0000:01:00.0: BAR 0: failed to assign [mem size 0x00000100]

The 00:00.0 mem window needs to be at least 3MB: the 01:00.0 device needs
0x204100 of space, and mem windows are megabyte-aligned.

Bus sizing can increase a bridge window size, but never *decrease* it (see
d65245c329 ("PCI: don't shrink bridge resources")).  Prior to
dff22d2054, ARM didn't read bridge windows at all, so the "original size"
was zero, and we assigned a 3MB window.

After dff22d2054, we read the bridge windows before sizing the bus.  The
firmware programmed a 16MB window (size 0x01000000) in 00:00.0, and since
we never decrease the size, we kept 16MB even though we only needed 3MB.
But 16MB doesn't fit in the host bridge aperture, so we failed to assign
space for the window and the downstream devices.

I think this is a defect in the PCI core: we shouldn't rely on the firmware
to assign sensible windows.

Ray reported a similar problem, also on ARM, with Broadcom iProc.

Issues like this are too hard to fix right now, so revert dff22d2054.

Reported-by: Hannes <oe5hpm@gmail.com>
Reported-by: Ray Jui <rjui@broadcom.com>
Link: http://lkml.kernel.org/r/CAAa04yFQEUJm7Jj1qMT57-LG7ZGtnhNDBe=PpSRa70Mj+XhW-A@mail.gmail.com
Link: http://lkml.kernel.org/r/55F75BB8.4070405@broadcom.com
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
 2015-09-15 13:18:04 -05:00