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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc driver patches from Greg KH:
"Here's the big driver misc / char pull request for 3.17-rc1.
Lots of things in here, the thunderbolt support for Apple laptops,
some other new drivers, testing fixes, and other good things. All
have been in linux-next for a long time"
* tag 'char-misc-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (119 commits)
misc: bh1780: Introduce the use of devm_kzalloc
Lattice ECP3 FPGA: Correct endianness
drivers/misc/ti-st: Load firmware from ti-connectivity directory.
dt-bindings: extcon: Add support for SM5502 MUIC device
extcon: sm5502: Change internal hardware switch according to cable type
extcon: sm5502: Detect cable state after completing platform booting
extcon: sm5502: Add support new SM5502 extcon device driver
extcon: arizona: Get MICVDD against extcon device
extcon: Remove unnecessary OOM messages
misc: vexpress: Fix sparse non static symbol warnings
mei: drop unused hw dependent fw status functions
misc: bh1770glc: Use managed functions
pcmcia: remove DEFINE_PCI_DEVICE_TABLE usage
misc: remove DEFINE_PCI_DEVICE_TABLE usage
ipack: Replace DEFINE_PCI_DEVICE_TABLE macro use
drivers/char/dsp56k.c: drop check for negativity of unsigned parameter
mei: fix return value on disconnect timeout
mei: don't schedule suspend in pm idle
mei: start disconnect request timer consistently
mei: reset client connection state on timeout
...
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This resolves a number of merge issues with changes in this tree and
Linus's tree at the same time.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add two quirks to support thunderbolt suspend/resume on Apple systems.
We need to perform two different actions during suspend and resume:
The whole controller has to be powered down before suspend. If this is
not done then the native host interface device will be gone after resume
if a thunderbolt device was plugged in before suspending. The controller
represents itself as multiple PCI devices/bridges. To power it down we
hook into the upstream bridge of the controller and call the magic ACPI
methods. Power will be restored automatically during resume (by the
firmware presumably).
During resume we have to wait for the native host interface to
reestablish all pci tunnels. Since there is no parent-child relationship
between the NHI and the bridges we have to explicitly wait for them
using device_pm_wait_for_dev. We do this in the resume_noirq phase of
the downstream bridges of the controller (which lead into the
thunderbolt tunnels).
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add pci_fixup_suspend_late as a new pci_fixup_pass. The pass is called
from suspend_noirq and poweroff_noirq. Using the same pass for suspend
and hibernate is consistent with resume_early which is called by
resume_noirq and restore_noirq.
The new quirk pass is required for Thunderbolt support on Apple
hardware.
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Ingo Molnar:
"The main changes in this cycle are:
- RAS tracing/events infrastructure, by Gong Chen.
- Various generalizations of the APEI code to make it available to
non-x86 architectures, by Tomasz Nowicki"
* 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ras: Fix build warnings in <linux/aer.h>
acpi, apei, ghes: Factor out ioremap virtual memory for IRQ and NMI context.
acpi, apei, ghes: Make NMI error notification to be GHES architecture extension.
apei, mce: Factor out APEI architecture specific MCE calls.
RAS, extlog: Adjust init flow
trace, eMCA: Add a knob to adjust where to save event log
trace, RAS: Add eMCA trace event interface
RAS, debugfs: Add debugfs interface for RAS subsystem
CPER: Adjust code flow of some functions
x86, MCE: Robustify mcheck_init_device
trace, AER: Move trace into unified interface
trace, RAS: Add basic RAS trace event
x86, MCE: Kill CPU_POST_DEAD
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APEI is currently implemented so that it depends on x86 hardware.
The primary dependency is that GHES uses the x86 NMI for hardware
error notification and MCE for memory error handling. These patches
remove that dependency.
Other APEI features such as error reporting via external IRQ, error
serialization, or error injection, do not require changes to use them
on non-x86 architectures.
The following patch set eliminates the APEI Kconfig x86 dependency
by making these changes:
- treat NMI notification as GHES architecture - HAVE_ACPI_APEI_NMI
- group and wrap around #ifdef CONFIG_HAVE_ACPI_APEI_NMI code which
is used only for NMI path
- identify architectural boxes and abstract it accordingly (tlb flush and MCE)
- rework ioremap for both IRQ and NMI context
NMI code is kept in ghes.c file since NMI and IRQ context are tightly coupled.
Note, these patches introduce no functional changes for x86. The NMI notification
feature is hard selected for x86. Architectures that want to use this
feature should also provide NMI code infrastructure.
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AER uses a separate trace interface by now. To make it
consistent, move it into unified RAS trace interface.
Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"I'll be on vacation until Aug 11, and I suspect the merge window will
open before then, so I'm sending this to you early. There are more
things I'd like to get into v3.17, so I hope to send another pull
request soon after I return.
The most notable pieces here are:
- Support BARs up to 128GB (up from 8GB)
- Fix SR-IOV resource assignment when we fail to expand a resource
- Rework pciehp to handle a common hardware erratum
- Cleanup MSI
- Fix NIC renaming issue
- Fix VGA default device issue on EFI systems
- Fix ASPM configuration (previously we didn't enable it as expected)
Alex Williamson has graciously agreed to take care of any major issues
with this if you take it before I return.
Details:
Resource management
- Support BAR sizes up to 128GB (Yinghai Lu)
- Keep original resource if we fail to expand it (Guo Chao)
- Return conventional error values from pci_revert_fw_address() (Bjorn Helgaas)
- Tidy resource assignment messages (Bjorn Helgaas)
- Don't exclude low BIOS area for non-PCI cards (Christoph Schulz)
PCI device hotplug
- Prevent NULL dereference during pciehp probe (Andreas Noever)
- Make pciehp pcie_wait_cmd() self-contained (Bjorn Helgaas)
- Wait for pciehp hotplug command completion lazily (Bjorn Helgaas)
- Compute pciehp timeout from hotplug command start time (Bjorn Helgaas)
- Remove pciehp assumptions about which commands cause completion events (Bjorn Helgaas)
- Clear pciehp Data Link Layer State Changed during init (Myron Stowe)
- Remove pciehp struct controller.no_cmd_complete (Rajat Jain)
- Remove cpqphp unnecessary null test (Fabian Frederick)
- Remove "invalid IRQ" warning for hot-added PCIe ports (Jiang Liu)
IOMMU
- Add DMA alias quirk for Intel 82801 bridge (Alex Williamson)
MSI
- Add internal msix_clear_and_set_ctrl() (Yijing Wang)
- Remove unused msi_enabled_mask() (Yijing Wang)
- Cache Multiple Message Capable in struct msi_desc (Yijing Wang)
- Add msi_setup_entry() to clean up initialization (Yijing Wang)
- Remove unused msi_remove_pci_irq_vectors() (Yijing Wang)
- Retrieve first MSI IRQ from msi_desc rather than pci_dev (Yijing Wang)
- Remove unused list access in __pci_restore_msix_state() (Yijing Wang)
- Use irq_get_msi_desc() to simplify code (Yijing Wang)
Generic host bridge driver
- Fix GPL v2 license string typo (Bjorn Helgaas)
Marvell MVEBU
- Fix GPL v2 license string typo (Thierry Reding)
NVIDIA Tegra
- Use correct initial HW settings (Phil Edworthy)
- Remove rcar_pcie_setup_window() resource argument (Phil Edworthy)
- Fix GPL v2 license string typo (Thierry Reding)
Renesas R-Car
- Remove redundant config accessor register checks (Sergei Shtylyov)
- Fix GPL v2 license string typo (Bjorn Helgaas)
Virtualization
- Factor secondary bus reset logic (Gavin Shan)
- Remove duplicate powerpc reset logic (Gavin Shan)
Miscellaneous
- Rework default VGA detection for EFI (Bruno Prémont)
- Fix sysfs "acpi_index" and "label" errors for NIC renaming (Simone Gotti)
- Configure ASPM at pci_enable_device()-time (Vidya Sagar)
- Add include/linux/pci_ids.h include guard (Rasmus Villemoes)"
* tag 'pci-v3.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (38 commits)
PCI/MSI: Use irq_get_msi_desc() to simplify code
PCI/MSI: Remove unused list access in __pci_restore_msix_state()
PCI/MSI: Retrieve first MSI IRQ from msi_desc rather than pci_dev
PCI/MSI: Remove unused function msi_remove_pci_irq_vectors()
PCI/MSI: Add msi_setup_entry() to clean up MSI initialization
PCI: Configure ASPM when enabling device
x86: don't exclude low BIOS area when allocating address space for non-PCI cards
PCI: generic: Fix GPL v2 license string typo
PCI: rcar: Fix GPL v2 license string typo
PCI: tegra: Fix GPL v2 license string typo
PCI: mvebu: Fix GPL v2 license string typo
PCI: Add include guard to include/linux/pci_ids.h
x86, ia64: Move EFI_FB vga_default_device() initialization to pci_vga_fixup()
PCI: Tidy resource assignment messages
PCI: Return conventional error values from pci_revert_fw_address()
PCI: Cleanup control flow
PCI: Support BAR sizes up to 128GB
PCI: cpqphp: Remove unnecessary null test before debugfs_remove()
PCI: pciehp: Clear Data Link Layer State Changed during init
PCI: Add bridge DMA alias quirk for Intel 82801 bridge
...
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'pci/host-tegra', 'pci/msi', 'pci/misc', 'pci/resource' and 'pci/virtualization' into next
* pci/host-generic:
PCI: generic: Fix GPL v2 license string typo
* pci/host-mvebu:
PCI: mvebu: Fix GPL v2 license string typo
* pci/host-rcar:
PCI: rcar: Fix GPL v2 license string typo
* pci/host-tegra:
PCI: tegra: Fix GPL v2 license string typo
* pci/msi:
PCI/MSI: Use irq_get_msi_desc() to simplify code
PCI/MSI: Remove unused list access in __pci_restore_msix_state()
PCI/MSI: Retrieve first MSI IRQ from msi_desc rather than pci_dev
PCI/MSI: Remove unused function msi_remove_pci_irq_vectors()
PCI/MSI: Add msi_setup_entry() to clean up MSI initialization
* pci/misc:
PCI: Configure ASPM when enabling device
x86: don't exclude low BIOS area when allocating address space for non-PCI cards
PCI: Add include guard to include/linux/pci_ids.h
x86, ia64: Move EFI_FB vga_default_device() initialization to pci_vga_fixup()
* pci/resource:
PCI: Tidy resource assignment messages
PCI: Return conventional error values from pci_revert_fw_address()
PCI: Cleanup control flow
PCI: Support BAR sizes up to 128GB
PCI: Keep original resource if we fail to expand it
* pci/virtualization:
powerpc/pci: Remove duplicate logic
PCI: Make resetting secondary bus logic common
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Commit d92a208d086 ("powerpc/pci: Mask linkDown on resetting PCI bus")
implemented same logic (resetting PCI secondary bus by bridge's config
register PCI_BRIDGE_CTL_BUS_RESET) in PCI core and arch-dependent code. To
avoid the duplication, move the logic to pci_reset_secondary_bus().
That commit did not declare the pcibios_reset_secondary_bus() interface in
linux/include/pci.h. Add the declaration.
No functional change.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Print messages about failures in pci_assign_resource(). We can drop the
"by-hand" message from _pci_assign_resource() because %pR now prints the
size rather than the address if the resource hasn't been assigned.
No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Previously we returned zero for success or 1 for failure. This changes
that so we return zero for success or a negative errno for failure.
No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Return errors immediately so the straightline path is the normal,
no-error path. No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Increase the maximum BAR size from 8GB to 128GB.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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If we have space assigned to a resource, we try to expand the resource
(e.g., to accommodate SR-IOV resources), and the expansion attempt fails,
we should keep the original assignment.
After bd064f0a231a ("PCI: Mark resources as IORESOURCE_UNSET if we can't
assign them"), we left the resource marked IORESOURCE_UNSET when the
expansion failed, even if it had originally been set. That caused errors
like this:
pci 0003:00:00.0: can't enable device: BAR 15 [mem size 0x0c000000 64bit pref] not assigned
pci 0003:00:00.0: Error enabling bridge (-22), continuing
Fix this by restoring the original flags when reassignment fails.
[bhelgaas: reworked to simplify, changelog]
Fixes: bd064f0a231a ("PCI: Mark resources as IORESOURCE_UNSET if we can't assign them")
Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v3.15+
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We can't do ASPM configuration at enumeration-time because enabling it
makes some defective hardware unresponsive, even if ASPM is disabled later
(see 41cd766b0659 ("PCI: Don't enable aspm before drivers have had a chance
to veto it"). Therefore, we have to do it after a driver claims the
device.
We previously configured ASPM in pci_set_power_state(), but that's not a
very good place because it's not really related to setting the PCI device
power state, and doing it there means:
- We incorrectly skipped ASPM config when setting a device that's
already in D0 to D0.
- We unnecessarily configured ASPM when setting a device to a low-power
state (the ASPM feature only applies when the device is in D0).
- We unnecessarily configured ASPM when called from a .resume() method
(ASPM configuration needs to be restored during resume, but
pci_restore_pcie_state() should already do this).
Move ASPM configuration from pci_set_power_state() to
do_pci_enable_device() so we do it when a driver enables a device.
[bhelgaas: changelog]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=79621
Fixes: db288c9c5f9d ("PCI / PM: restore the original behavior of pci_set_power_state()")
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Vidya Sagar <sagar.tv@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v3.6+
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Use irq_get_msi_desc() to get MSI IRQ related msi_desc directly instead of
searching the dev->msi_list.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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In __pci_restore_msix_state(), we get the first element from msi_list, but
we never use it. Remove this useless code.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Retrieve the first MSI IRQ to compute the MSI index from struct msi_desc
rather than the struct pci_dev to avoid an additional memory access.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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msi_remove_pci_irq_vectors() is unused, so remove it.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Move MSI entry stuff to a new function, msi_setup_entry(), to simplify
msi_capability_init() as MSI-X does.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Per license_is_gpl_compatible(), the MODULE_LICENSE() string for GPL v2 is
"GPL v2", not "GPLv2". Use "GPL v2" so this module doesn't taint the
kernel.
[bhelgaas: changelog]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
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Per license_is_gpl_compatible(), the MODULE_LICENSE() string for GPL v2 is
"GPL v2", not "GPLv2". Use "GPL v2" so this module doesn't taint the
kernel.
Based-on-work-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Per license_is_gpl_compatible(), the MODULE_LICENSE() string for GPL v2 is
"GPL v2", not "GPLv2". Use "GPL v2" so this module doesn't taint the
kernel.
[bhelgaas: changelog]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Per license_is_gpl_compatible(), the MODULE_LICENSE() string for GPL v2 is
"GPL v2", not "GPLv2". Use "GPL v2" so this module doesn't taint the
kernel.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
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'pci/msi' into next
* pci/host-rcar:
PCI: rcar: Remove rcar_pcie_setup_window() resource argument
PCI: rcar: Cleanup style and formatting
PCI: rcar: Use correct initial HW settings
PCI: rcar: Remove redundant config accessor register number checks
* pci/hotplug:
PCI: cpqphp: Remove unnecessary null test before debugfs_remove()
PCI: pciehp: Clear Data Link Layer State Changed during init
PCI: pciehp: Remove struct controller.no_cmd_complete
PCI: pciehp: Remove assumptions about which commands cause completion events
PCI: pciehp: Compute timeout from hotplug command start time
PCI: pciehp: Wait for hotplug command completion lazily
PCI: pciehp: Make pcie_wait_cmd() self-contained
PCI: Prevent NULL dereference during pciehp probe
* pci/iommu:
PCI: Add bridge DMA alias quirk for Intel 82801 bridge
* pci/misc:
ACPI / PCI: Fix sysfs acpi_index and label errors
PCI/portdrv: Remove warning about invalid IRQ for hot-added PCIe ports
* pci/msi:
PCI/MSI: Cache Multiple Message Capable in struct msi_desc
PCI/MSI: Remove unused msi_enabled_mask()
PCI/MSI: Add internal msix_clear_and_set_ctrl() function
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The Multiple Message Capable field in the MSI Message Control register
indicates how many vectors the device supports. This field is read-only,
so cache it in msi_desc to avoid reading it repeatedly.
Since we cache the extracted field (not the entire Message Control
register), we can use msi_mask() instead of msi_capable_mask(), which is
then unused, so remove it.
[bhelgaas: fix whitespace, changelog]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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No one uses msi_enabled_mask(); remove the dead code. No functional
change.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Add msix_clear_and_set_ctrl() simplify code. No functional change.
[bhelgaas: fix whitespace]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Fix errors in handling "device label" _DSM return values.
If _DSM returns a Unicode string, the ACPI type is ACPI_TYPE_BUFFER, not
ACPI_TYPE_STRING. Fix dsm_label_utf16s_to_utf8s() to convert UTF-16 from
acpi_object->buffer instead of acpi_object->string.
Prior to v3.14, we accepted Unicode labels (ACPI_TYPE_BUFFER return
values). But after 1d0fcef73283, we accepted only ASCII (ACPI_TYPE_STRING)
(and we incorrectly tried to convert those ASCII labels from UTF-16 to
UTF-8).
Rejecting Unicode labels made us return -EPERM when reading sysfs
"acpi_index" or "label" files, which in turn caused on-board network
interfaces on a Dell PowerEdge E420 to be renamed (by udev net_id internal)
from eno1/eno2 to enp2s0f0/enp2s0f1.
Fix this by accepting either ACPI_TYPE_STRING (and treating it as ASCII) or
ACPI_TYPE_BUFFER (and converting from UTF-16 to UTF-8).
[bhelgaas: changelog]
Fixes: 1d0fcef73283 ("ACPI / PCI: replace open-coded _DSM code with helper functions")
Signed-off-by: Simone Gotti <simone.gotti@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com>
CC: stable@vger.kernel.org # v3.14+
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For hot-added PCIe ports on x86 platforms, we always warned about an
invalid IRQ, e.g.,
pci 0000:00:00.0: device [8086:0e0b] has invalid IRQ; check vendor BIOS
This was because we check pci_dev->irq before actually allocating the IRQ
for the device, which happens in this path:
pcie_port_device_register
pci_enable_device
pci_enable_device_flags
do_pci_enable_device
pcibios_enable_device (on x86)
pcibios_enable_irq
This warning message isn't generated for PCIe ports present at boot time
because x86 arch code has called acpi_pci_irq_enable() in pci_acpi_init()
for each PCI device for safety.
[bhelgaas: changelog]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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This bridge sometimes shows up as a root complex device and sometimes as a
discrete PCIe-to-PCI bridge. Testing indicates that in the latter case, we
need to enable the PCIe bridge DMA alias quirk.
Reported-by: Milos Kaurin <milos.kaurin@gmail.com>
Tested-by: Milos Kaurin <milos.kaurin@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Fix checkpatch warning:
"WARNING: debugfs_remove(NULL) is safe this check is probably not required"
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Ryan Desfosses <ryan@desfo.org>
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During PCIe hot-plug initialization - pciehp_probe() - data structures
related to slot capabilities are set up. As part of this set up, ISRs are
put in place to handle slot events and all event bits are cleared out.
This patch adds the Data Link Layer State Changed (PCI_EXP_SLTSTA_DLLSC)
Slot Status bit to the event bits that are cleared out during
initialization.
If the BIOS doesn't clear DLLSC before handoff to the OS, pciehp notices
that it's set and interprets it as a new Link Up event, which results in
spurious messages:
pciehp 0000:82:04.0:pcie24: slot(4): Link Up event
pciehp 0000:82:04.0:pcie24: Device 0000:83:00.0 already exists at 0000:83:00, cannot hot-add
pciehp 0000:82:04.0:pcie24: Cannot add device at 0000:83:00
Prior to e48f1b67f668 ("PCI: pciehp: Use link change notifications for
hot-plug and removal"), pciehp ignored DLLSC.
Reference:
PCI-SIG. PCI Express Base Specification Revision 4.0 Version 0.3
(PCI-SIG, 2014): 7.8.11. Slot Status Register (Offset 1Ah).
[bhelgaas: add e48f1b67f668 ref and stable tag]
Fixes: e48f1b67f668 ("PCI: pciehp: Use link change notifications for hot-plug and removal")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=79611
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v3.15+
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"no_cmd_complete" is only used once, and it duplicates read-only
information we already have in the cached Slot Capabilities value.
Remove the field and use the existing macro NO_CMD_CMPL() instead.
[bhelgaas: changelog]
Signed-off-by: Rajat Jain <rajatxjain@gmail.com>
Signed-off-by: Rajat Jain <rajatjain@juniper.net>
Signed-off-by: Guenter Roeck <groeck@juniper.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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We use incorrect logic to decide whether a PCIe hotplug controller
generates command completion events.
5808639bfa98 ("pciehp: fix slow probing") assumed that the Slot Status
"Command Completed" bit was set only for commands affecting slot power,
indicators, or electromechanical interlock. That assumption is false: per
sec. 6.7.3.2 of PCIe spec r3.0, a write targeting any portion of the Slot
Control register is a command, and (if command completed events are
supported) software must wait for a command to complete before issuing the
next command.
5808639bfa98 was to fix boot-time timeouts (see bugzilla below) on a Lenovo
Thinkpad R61 with an Intel hotplug controller. The controller probably has
the Intel CF118 erratum, which means it doesn't report Command Completed
unless the Slot Control power, indicator, or interlock bits are changed.
This causes a timeout because pciehp always waits for Command Complete (if
supported), regardless of which bits are changed.
Remove the incorrect logic because the timeouts have been addressed
differently by these changes:
PCI: pciehp: Wait for hotplug command completion lazily
PCI: pciehp: Compute timeout from hotplug command start time
Link: https://bugzilla.kernel.org/show_bug.cgi?id=10751
Tested-by: Rajat Jain <rajatxjain@gmail.com> (IDT 807a controller)
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
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If we issue a hotplug command, go do something else, then come back and
wait for the command to complete, we don't have to wait the whole timeout
period, because some of it elapsed while we were doing something else.
Keep track of the time we issued the command, and wait only until the
timeout period from that point has elapsed.
For controllers with errata like Intel CF118, we previously timed out
before issuing the second hotplug command:
At time T1 (during boot):
- Write DLLSCE, ABPE, PDCE, etc. to Slot Control
At time T2 (hotplug event):
- Wait for command completion (CC) in Slot Status
- Timeout at T2 + 1 second because CC is never set in Slot Status
- Write PCC, PIC, etc. to Slot Control
With this change, we wait until T1 + 1 second instead of T2 + 1 second.
If the hotplug event is more than 1 second after the boot-time
initialization, we won't wait for the timeout at all.
We still emit a "Timeout on hotplug command" message if it timed out; we
should see this on the first hotplug event on every controller with this
erratum, as well as on real errors on controllers without the erratum.
Link: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e7-v2-spec-update.html
Tested-by: Rajat Jain <rajatxjain@gmail.com> (IDT 807a controller)
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
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Previously we issued a hotplug command and waited for it to complete. But
there's no need to wait until we're ready to issue the *next* command. The
next command will probably be much later, so the first one may have already
completed and we may not have to actually wait at all.
Because of hardware errata, some controllers generate command completion
events for some commands but not others. In the case of Intel CF118 (see
spec update reference), the controller indicates command completion only
for Slot Control writes that change the value of the following bits:
Power Controller Control
Power Indicator Control
Attention Indicator Control
Electromechanical Interlock Control
Changes to other bits, e.g., the interrupt enable bits, do not cause the
Command Completed bit to be set. Controllers from AMD and Nvidia are
reported to have similar errata.
These errata cause timeouts when pcie_enable_notification() enables
interrupts. Previously that timeout occurred at boot-time. With this
change, the timeout occurs later, when we change the state of the slot
power, indicators, or interlock. This speeds up boot but causes a timeout
at the first hotplug event on the slot. Subsequent events don't timeout
because only the first (boot-time) hotplug command updates Slot Control
without touching the power/indicator/interlock controls.
Link: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e7-v2-spec-update.html
Tested-by: Rajat Jain <rajatxjain@gmail.com> (IDT 807a controller)
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
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pcie_wait_cmd() waits for the controller to finish a hotplug command. Move
the associated logic (to determine whether waiting is required and whether
we're using interrupts or polling) from pcie_write_cmd() to
pcie_wait_cmd().
No functional change.
Tested-by: Rajat Jain <rajatxjain@gmail.com> (IDT 807a controller)
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
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pciehp assumes that dev->subordinate exists. But we do not assign a bus if
we run out of bus numbers during enumeration. This leads to a NULL
dereference in init_slot() (and other places).
Change pciehp_probe() to return -ENODEV when no subordinate bus is present.
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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rcar_pcie_setup_window() took both the window number and the resource,
which was redundant because we can look up the resource from the window
number.
Remove the "res" argument.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
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This patch just makes symbol and function name changes to avoid potential
conflicts, along with minor formatting changes.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
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Although the R-Car PCIe driver works as it is, there are a number of
incorrect settings that this patch corrects. It corrects:
- enabling the PCI Express Extended Cap ID.
- setting Data Link Layer Link Active Reporting Capable.
- terminating list of capabilities.
It also removes enabling the MAC data scrambling as this is the default HW
setting, and removes incorrect code to enable slave bus mastering as this
is done by the PCI core.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
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The PCI core will have already checked the configuration register address
before calling the {read|write}() methods; so don't check it again in these
methods.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Phil Edworthy <phil.edworthy@renesas.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
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pci_wait_for_pending() uses word access, so we shouldn't be passing
an offset that is only byte aligned. Use the control register offset
instead, shifting the mask to match.
Fixes: d0b4cc4e3270 ("PCI: Wrong register used to check pending traffic")
Fixes: 157e876ffe0b ("PCI: Add pci_wait_for_pending() (refactor pci_wait_for_pending_transaction())
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
CC: stable@vger.kernel.org # v3.14+
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull more PCI updates from Bjorn Helgaas:
"Here are some more things I'd like to see in v3.16-rc1:
- DMA alias iterator, part of some work to fix IOMMU issues
- MVEBU, Tegra, DesignWare changes that I forgot to include before
- Some whitespace code cleanup
Details:
IOMMU
- Add DMA alias iterator (Alex Williamson)
- Add DMA alias quirks for ASMedia, ITE, Tundra bridges (Alex Williamson)
- Add DMA alias quirks for Marvell, Ricoh devices (Alex Williamson)
- Add DMA alias quirk for HighPoint devices (Jérôme Carretero)
MSI
- Fix leak in free_msi_irqs() (Alexei Starovoitov)
Marvell MVEBU
- Remove unnecessary use of 'conf_lock' spinlock (Andrew Murray)
- Avoid setting an undefined window size (Jason Gunthorpe)
- Allow several windows with the same target/attribute (Thomas Petazzoni)
- Split PCIe BARs into multiple MBus windows when needed (Thomas Petazzoni)
- Fix off-by-one in the computed size of the mbus windows (Willy Tarreau)
NVIDIA Tegra
- Use new OF interrupt mapping when possible (Lucas Stach)
Synopsys DesignWare
- Remove unnecessary use of 'conf_lock' spinlock (Andrew Murray)
- Use new OF interrupt mapping when possible (Lucas Stach)
- Split Exynos and i.MX bindings (Lucas Stach)
- Fix comment for setting number of lanes (Mohit Kumar)
- Fix iATU programming for cfg1, io and mem viewport (Mohit Kumar)
Miscellaneous
- EXPORT_SYMBOL cleanup (Ryan Desfosses)
- Whitespace cleanup (Ryan Desfosses)
- Merge multi-line quoted strings (Ryan Desfosses)"
* tag 'pci-v3.16-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (21 commits)
PCI: Add function 1 DMA alias quirk for HighPoint RocketRaid 642L
PCI/MSI: Fix memory leak in free_msi_irqs()
PCI: Merge multi-line quoted strings
PCI: Whitespace cleanup
PCI: Move EXPORT_SYMBOL so it immediately follows function/variable
PCI: Add bridge DMA alias quirk for ITE bridge
PCI: designware: Split Exynos and i.MX bindings
PCI: Add bridge DMA alias quirk for ASMedia and Tundra bridges
PCI: Add support for PCIe-to-PCI bridge DMA alias quirks
PCI: Add function 1 DMA alias quirk for Marvell devices
PCI: Add function 0 DMA alias quirk for Ricoh devices
PCI: Add support for DMA alias quirks
PCI: Convert pci_dev_flags definitions to bit shifts
PCI: Add DMA alias iterator
PCI: mvebu: Use '%pa' for printing 'phys_addr_t' type
PCI: mvebu: Remove unnecessary use of 'conf_lock' spinlock
PCI: designware: Remove unnecessary use of 'conf_lock' spinlock
PCI: designware: Use new OF interrupt mapping when possible
PCI: designware: Fix iATU programming for cfg1, io and mem viewport
PCI: designware: Fix comment for setting number of lanes
...
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* pci/msi:
PCI/MSI: Fix memory leak in free_msi_irqs()
* pci/iommu:
PCI: Add function 1 DMA alias quirk for HighPoint RocketRaid 642L
PCI: Add bridge DMA alias quirk for ITE bridge
* pci/cleanup:
PCI: Merge multi-line quoted strings
PCI: Whitespace cleanup
PCI: Move EXPORT_SYMBOL so it immediately follows function/variable
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Merge quoted strings that are broken across lines into a single entity.
The compiler merges them anyway, but checkpatch complains about it, and
merging them makes it easier to grep for strings.
No functional change.
[bhelgaas: changelog, do the same for everything under drivers/pci]
Signed-off-by: Ryan Desfosses <ryan@desfo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Fix various whitespace errors.
No functional change.
[bhelgaas: fix other similar problems]
Signed-off-by: Ryan Desfosses <ryan@desfo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Move EXPORT_SYMBOL so it immediately follows the function or variable.
No functional change.
[bhelgaas: squash similar changes, fix hotplug, probe, rom, search, too]
Signed-off-by: Ryan Desfosses <ryan@desfo.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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