* pci/resource:
unicore32/PCI: Remove pci=firmware command line parameter handling
ARM/PCI: Remove arch-specific pcibios_enable_device()
ARM64/PCI: Remove arch-specific pcibios_enable_device()
MIPS/PCI: Claim bus resources on PCI_PROBE_ONLY set-ups
ARM/PCI: Claim bus resources on PCI_PROBE_ONLY set-ups
PCI: generic: Claim bus resources on PCI_PROBE_ONLY set-ups
PCI: Add generic pci_bus_claim_resources()
alx: Use pci_(request|release)_mem_regions
ethernet/intel: Use pci_(request|release)_mem_regions
GenWQE: Use pci_(request|release)_mem_regions
lpfc: Use pci_(request|release)_mem_regions
NVMe: Use pci_(request|release)_mem_regions
PCI: Add helpers to request/release memory and I/O regions
PCI: Extending pci=resource_alignment to specify device/vendor IDs
sparc/PCI: Implement pci_resource_to_user() with pcibios_resource_to_bus()
powerpc/pci: Implement pci_resource_to_user() with pcibios_resource_to_bus()
microblaze/PCI: Implement pci_resource_to_user() with pcibios_resource_to_bus()
PCI: Unify pci_resource_to_user() declarations
microblaze/PCI: Remove useless __pci_mmap_set_pgprot()
powerpc/pci: Remove __pci_mmap_set_pgprot()
PCI: Ignore write combining when mapping I/O port space
* pci/aspm:
PCI/ASPM: Remove redundant check of pcie_set_clkpm
* pci/dpc:
PCI: Remove DPC tristate module option
PCI: Bind DPC to Root Ports as well as Downstream Ports
PCI: Fix whitespace in struct dpc_dev
PCI: Convert Downstream Port Containment driver to use devm_* functions
* pci/hotplug:
PCI: Allow additional bus numbers for hotplug bridges
* pci/misc:
PCI: Include <asm/dma.h> for isa_dma_bridge_buggy
PCI: Make bus_attr_resource_alignment static
MAINTAINERS: Add file patterns for PCI device tree bindings
PCI: Fix comment typo
* pci/msi:
PCI/MSI: irqchip: Fix PCI_MSI dependencies
* pci/pm:
PCI: pciehp: Ignore interrupts during D3cold
PCI: Document connection between pci_power_t and hardware PM capability
PCI: Add runtime PM support for PCIe ports
ACPI / hotplug / PCI: Runtime resume bridge before rescan
PCI: Power on bridges before scanning new devices
PCI: Put PCIe ports into D3 during suspend
PCI: Don't clear d3cold_allowed for PCIe ports
PCI / PM: Enforce type casting for pci_power_t
* pci/virtualization:
PCI: Add ACS quirk for Solarflare SFC9220
PCI: Add DMA alias quirk for Adaptec 3805
PCI: Mark Atheros AR9485 and QCA9882 to avoid bus reset
PCI: Add function 1 DMA alias quirk for Marvell 88SE9182
A user may hot add a switch requiring more than one bus to enumerate. This
previously required a system reboot if BIOS did not sufficiently pad the
bus resource, which they frequently don't do.
Add a kernel parameter so a user can specify the minimum number of bus
numbers to reserve for a hotplug bridge's subordinate buses so rebooting
won't be necessary.
The default is 1, which is equivalent to previous behavior.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
When assign new PCI platform PM operations check for all mandatory fields to
prevent NULL pointer dereference.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
At least on arm, <asm/dma.h> does not get included when building
drivers/pci/pci.o. This causes the following build warning which can be
fixed by including <asm/dma.h>:
drivers/pci/pci.c:37:5: warning: symbol 'isa_dma_bridge_buggy' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Some uio-based PCI drivers, e.g., uio_cif do not work if the assigned PCI
memory resources are not page aligned.
By using the kernel option "pci=resource_alignment" it is possible to force
single PCI boards to use page alignment for their memory resources.
However, this is fairly cumbersome if several of these boards are in use
as the specification of the cards has to be done via PCI bus/slot/function
number which might change, e.g., by adding another board.
Extend the kernel option "pci=resource_alignment" to allow specification of
relevant devices via PCI device/vendor (and subdevice/subvendor) IDs. The
specification of the devices via device/vendor is indicated by a leading
string "pci:" as argument to "pci=resource_alignment". The format of the
specification is pci:<vendor>:<device>[:<subvendor>:<subdevice>]
Signed-off-by: Mathias Koehrer <mathias.koehrer@etas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Currently the Linux PCI core does not touch power state of PCI bridges and
PCIe ports when system suspend is entered. Leaving them in D0 consumes
power unnecessarily and may prevent the CPU from entering deeper C-states.
With recent PCIe hardware we can power down the ports to save power given
that we take into account few restrictions:
- The PCIe port hardware is recent enough, starting from 2015.
- Devices connected to PCIe ports are effectively in D3cold once the port
is transitioned to D3 (the config space is not accessible anymore and
the link may be powered down).
- Devices behind the PCIe port need to be allowed to transition to D3cold
and back. There is a way both drivers and userspace can forbid this.
- If the device behind the PCIe port is capable of waking the system it
needs to be able to do so from D3cold.
This patch adds a new flag to struct pci_device called 'bridge_d3'. This
flag is set and cleared by the PCI core whenever there is a change in power
management state of any of the devices behind the PCIe port. When system
later on is suspended we only need to check this flag and if it is true
transition the port to D3 otherwise we leave it in D0.
Also provide override mechanism via command line parameter
"pcie_port_pm=[off|force]" that can be used to disable or enable the
feature regardless of the BIOS manufacturing date.
Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The symbol bus_attr_resource_alignment is not exported or declared
elsewhere, so make it static to fix the following warning:
drivers/pci/pci.c:4900:1: warning: symbol 'bus_attr_resource_alignment' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Extend pci_bus_find_domain_nr() so it can find the domain from either:
- ACPI, via the new acpi_pci_bus_find_domain_nr() interface, or
- DT, via of_pci_bus_find_domain_nr()
Note that this is only used for CONFIG_PCI_DOMAINS_GENERIC=y, so it does
not affect x86 or ia64.
[bhelgaas: changelog]
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
pci_bus_find_domain_nr() retrieves the host bridge domain number in a
DT-specific way. Rename it to of_pci_bus_find_domain_nr() to reflect that,
so we can add a corresponding function for ACPI.
[bhelgaas: changelog]
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Instead of assigning bus->domain_nr inside pci_bus_assign_domain_nr(),
return the domain and let the caller do the assignment. Rename
pci_bus_assign_domain_nr() to pci_bus_find_domain_nr() to reflect this.
No functional change intended.
[bhelgaas: changelog]
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Add pci_unmap_iospace() to undo what pci_remap_iospace() did.
This is needed to support hotplug removal of host bridges that use
pci_remap_iospace().
[bhelgaas: changelog]
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
* pci/arm64:
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/host-hv:
PCI: hv: Add explicit barriers to config space access
* 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
Resource flags are exposed to userspace via the sysfs "resource" file.
lspci reads the sysfs file to determine resource properties.
Add a "BAR Equivalent Indicator" flag so lspci can distinguish between
[virtual] and [enhanced] resources.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sean O. Stalley <sean.stalley@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
No functional changes in this patch.
PCI I/O space mapping code does not depend on OF; therefore it can be moved
to PCI core code. This way we will be able to use it, e.g., in ACPI PCI
code.
Suggested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Liviu Dudau <Liviu.Dudau@arm.com>
The original thought was that if a device implemented ACS, then surely
we want to use that... well, it turns out that devices can make an ACS
capability so broken that we still need to fall back to quirks.
Reverse the order of ACS enabling to give quirks first shot at it.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Solve IOMMU support issues with PCIe non-transparent bridges that use
Requester ID look-up tables (RID-LUT), e.g., the PEX8733.
The NTB connects devices in two independent PCI domains. Devices separated
by the NTB are not able to discover each other. A PCI packet being
forwared from one domain to another has to have its RID modified so it
appears on correct bus and completions are forwarded back to the original
domain through the NTB. The RID is translated using a preprogrammed table
(LUT) and the PCI packet propagates upstream away from the NTB. If the
destination system has IOMMU enabled, the packet will be discarded because
the new RID is unknown to the IOMMU. Adding a DMA alias for the new RID
allows IOMMU to properly recognize the packet.
Each device behind the NTB has a unique RID assigned in the RID-LUT. The
current DMA alias implementation supports only a single alias, so it's not
possible to support mutiple devices behind the NTB when IOMMU is enabled.
Enable all possible aliases on a given bus (256) that are stored in a
bitset. Alias devfn is directly translated to a bit number. The bitset is
not allocated for devices that have no need for DMA aliases.
More details can be found in the following article:
http://www.plxtech.com/files/pdf/technical/expresslane/RTC_Enabling%20MulitHostSystemDesigns.pdf
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
One of the quirks that adds DMA aliases logs an informational message in
dmesg. Move that to pci_add_dma_alias() so all users log the message
consistently. No functional change intended (except extra message).
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Add a pci_add_dma_alias() interface to encapsulate the details of adding an
alias. No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Fix spelling of "initalization".
[bhelgaas: also fix pci/pci.c]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* pci/aer:
PCI/AER: Log aer_inject error injections
PCI/AER: Log actual error causes in aer_inject
PCI/AER: Use dev_warn() in aer_inject
PCI/AER: Fix aer_inject error codes
* pci/enumeration:
PCI: Fix broken URL for Dell biosdevname
* pci/kconfig:
PCI: Cleanup pci/pcie/Kconfig whitespace
PCI: Include pci/hotplug Kconfig directly from pci/Kconfig
PCI: Include pci/pcie/Kconfig directly from pci/Kconfig
* pci/misc:
PCI: Add PCI_CLASS_SERIAL_USB_DEVICE definition
PCI: Add QEMU top-level IDs for (sub)vendor & device
unicore32: Remove unused HAVE_ARCH_PCI_SET_DMA_MASK definition
PCI: Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h
PCI: Move pci_dma_* helpers to common code
frv/PCI: Remove stray pci_{alloc,free}_consistent() declaration
* pci/virtualization:
PCI: Wait for up to 1000ms after FLR reset
PCI: Support SR-IOV on any function type
* pci/vpd:
PCI: Prevent VPD access for buggy devices
PCI: Sleep rather than busy-wait for VPD access completion
PCI: Fold struct pci_vpd_pci22 into struct pci_vpd
PCI: Rename VPD symbols to remove unnecessary "pci22"
PCI: Remove struct pci_vpd_ops.release function pointer
PCI: Move pci_vpd_release() from header file to pci/access.c
PCI: Move pci_read_vpd() and pci_write_vpd() close to other VPD code
PCI: Determine actual VPD size on first access
PCI: Use bitfield instead of bool for struct pci_vpd_pci22.busy
PCI: Allow access to VPD attributes with size 0
PCI: Update VPD definitions
Some devices take longer than the spec indicates to return from FLR reset,
a notable case of this is Intel integrated graphics (IGD), which can often
take an additional 300ms powering down an attached LCD panel as part of the
FLR. Allow devices up to 1000ms, testing every 100ms whether the second
dword of config space is read as -1.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
pci_create_root_bus() passes a "parent" pointer to
pci_bus_assign_domain_nr(). When CONFIG_PCI_DOMAINS_GENERIC is defined,
pci_bus_assign_domain_nr() dereferences that pointer. Many callers of
pci_create_root_bus() supply a NULL "parent" pointer, which leads to a NULL
pointer dereference error.
7c67470009 ("PCI: Move domain assignment from arm64 to generic code")
moved the "parent" dereference from arm64 to generic code. Only arm64 used
that code (because only arm64 defined CONFIG_PCI_DOMAINS_GENERIC), and it
always supplied a valid "parent" pointer. Other arches supplied NULL
"parent" pointers but didn't defined CONFIG_PCI_DOMAINS_GENERIC, so they
used a no-op version of pci_bus_assign_domain_nr().
8c7d14746a ("ARM/PCI: Move to generic PCI domains") defined
CONFIG_PCI_DOMAINS_GENERIC on ARM, and many ARM platforms use
pci_common_init(), which supplies a NULL "parent" pointer.
These platforms (cns3xxx, dove, footbridge, iop13xx, etc.) crash
with a NULL pointer dereference like this while probing PCI:
Unable to handle kernel NULL pointer dereference at virtual address 000000a4
PC is at pci_bus_assign_domain_nr+0x10/0x84
LR is at pci_create_root_bus+0x48/0x2e4
Kernel panic - not syncing: Attempted to kill init!
[bhelgaas: changelog, add "Reported:" and "Fixes:" tags]
Reported: http://forum.doozan.com/read.php?2,17868,22070,quote=1
Fixes: 8c7d14746a ("ARM/PCI: Move to generic PCI domains")
Fixes: 7c67470009 ("PCI: Move domain assignment from arm64 to generic code")
Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
CC: stable@vger.kernel.org # v4.0+
Christoph added a generic include/linux/pci-dma-compat.h, so now there's
one place with most of the PCI DMA interfaces. Move more PCI DMA-related
things there:
- The PCI_DMA_* direction constants from linux/pci.h
- The pci_set_dma_max_seg_size() and pci_set_dma_seg_boundary()
CONFIG_PCI implementations from drivers/pci/pci.c
- The pci_set_dma_max_seg_size() and pci_set_dma_seg_boundary()
!CONFIG_PCI stubs from linux/pci.h
- The pci_set_dma_mask() and pci_set_consistent_dma_mask()
!CONFIG_PCI stubs from linux/pci.h
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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)
Fix all whitespace issues (missing or needed whitespace) in all files in
drivers/pci. Code is compiled with allyesconfig before and after code
changes and objects are recorded and checked with objdiff and they are not
changed after this commit.
Signed-off-by: Bogicevic Sasa <brutallesale@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The pci_platform_pm_ops structure is never modified, so declare it as
const.
Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* 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
An Enhanced Allocation Capability entry with BEI 0 fills in
dev->resource[0] just like a real BAR 0 would, but non-EA experts might not
connect "EA - BEI 0" with BAR 0.
Decode the EA jargon a little bit, e.g., change this:
pci 0002:01:00.0: EA - BEI 0, Prop 0x00: [mem 0x84300000-0x84303fff]
to this:
pci 0002:01:00.0: BAR 0: [mem 0x84300000-0x84303fff] (from Enhanced Allocation, properties 0x00)
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Expand bitmask #defines completely. This puts the shift in the code
instead of in the #define, but it makes it more obvious in the header file
how fields in the register are laid out.
No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
SR-IOV BARs can be specified via EA entries. Extend the EA parser to
extract the SRIOV BAR resources, and modify sriov_init() to use resources
previously obtained via EA.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Sean O. Stalley <sean.stalley@intel.com>
Add support for devices using Enhanced Allocation entries instead of BARs.
This allows the kernel to parse the EA Extended Capability structure in PCI
config space and claim the BAR-equivalent resources.
See https://pcisig.com/sites/default/files/specification_documents/ECN_Enhanced_Allocation_23_Oct_2014_Final.pdf
[bhelgaas: add spec URL, s/pci_ea_set_flags/pci_ea_flags/, consolidate
declarations, print unknown property in hex to match spec]
Signed-off-by: Sean O. Stalley <sean.stalley@intel.com>
[david.daney@cavium.com: Add more support/checking for Entry Properties,
allow EA behind bridges, rewrite some error messages.]
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The Chelsio T5 has a PCIe compliance erratum that causes Malformed TLP or
Unexpected Completion errors in some systems, which may cause device access
timeouts.
Per PCIe r3.0, sec 2.2.9, "Completion headers must supply the same values
for the Attribute as were supplied in the header of the corresponding
Request, except as explicitly allowed when IDO is used."
Instead of copying the Attributes from the Request to the Completion, the
T5 always generates Completions with zero Attributes. The receiver of a
Completion whose Attributes don't match the Request may accept it (which
itself seems non-compliant based on sec 2.3.2), or it may handle it as a
Malformed TLP or an Unexpected Completion, which will probably lead to a
device access timeout.
Work around this by disabling "Relaxed Ordering" and "No Snoop" in the Root
Port so it always generate Requests with zero Attributes.
This does affect all other devices which are downstream of that Root Port,
but these are performance optimizations that should not make a functional
difference.
Note that Configuration Space accesses are never supposed to have TLP
Attributes, so we're safe waiting till after any Configuration Space
accesses to do the Root Port "fixup".
Based on original work by Casey Leedom <leedom@chelsio.com>
[bhelgaas: changelog, comments, rename to pci_find_pcie_root_port(), rework
to use pci_upstream_bridge() and check for Root Port device type, edit
diagnostics to clarify intent and devices affected]
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Commit bac2a909a0 (PCI / PM: Avoid resuming PCI devices during
system suspend) introduced a mechanism by which some PCI devices that
were runtime-suspended at the system suspend time might be left in
that state for the duration of the system suspend-resume cycle.
However, it overlooked devices that were marked as capable of waking
up the system just because PME support was detected in their PCI
config space.
Namely, in that case, device_can_wakeup(dev) returns 'true' for the
device and if the device is not configured for system wakeup,
device_may_wakeup(dev) returns 'false' and it will be resumed during
system suspend even though configuring it for system wakeup may not
really make sense at all.
To avoid this problem, simply disable PME for PCI devices that have
not been configured for system wakeup and are runtime-suspended at
the system suspend time for the duration of the suspend-resume cycle.
If the device is in D3cold, its config space is not available and it
shouldn't be written to, but that's only possible if the device
has platform PM support and the platform code is responsible for
checking whether or not the device's configuration is suitable for
system suspend in that case.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
AER errors might be recorded when powering-on devices. These errors can be
ignored, so firmware usually clears them before the OS enumerates devices.
However, firmware is not involved when devices are added via hotplug, so
the OS may discover power-up errors that should be ignored. The same may
happen when powering up devices when resuming after suspend.
Clear the AER error status registers during enumeration and resume.
[bhelgaas: changelog, remove repetitive comments]
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
VF BARs are read-only zero, so updating VF BARs will not have any effect.
See the SR-IOV spec r1.1, sec 3.4.1.11.
Don't update VF BARs in pci_restore_bars().
This avoids spurious "BAR %d: error updating" messages that we see when
doing vfio pass-through after 6eb7018705 ("vfio-pci: Move idle devices to
D3hot power state").
[bhelgaas: changelog, fix whitespace]
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Pull x86 mm updates from Ingo Molnar:
"The dominant change in this cycle was the continued work to isolate
kernel drivers from MTRR legacies: this tree gets rid of all kernel
internal driver interfaces to MTRRs (mostly by rewriting it to proper
PAT interfaces), the only access left is the /proc/mtrr ABI.
This work was done by Luis R Rodriguez.
There's also some related PCI interface additions for which I've
Cc:-ed Bjorn"
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
x86/mm/mtrr: Remove kernel internal MTRR interfaces: unexport mtrr_add() and mtrr_del()
s390/io: Add pci_iomap_wc() and pci_iomap_wc_range()
drivers/dma/iop-adma: Use dma_alloc_writecombine() kernel-style
drivers/video/fbdev/vt8623fb: Use arch_phys_wc_add() and pci_iomap_wc()
drivers/video/fbdev/s3fb: Use arch_phys_wc_add() and pci_iomap_wc()
drivers/video/fbdev/arkfb.c: Use arch_phys_wc_add() and pci_iomap_wc()
PCI: Add pci_iomap_wc() variants
drivers/video/fbdev/gxt4500: Use pci_ioremap_wc_bar() to map framebuffer
drivers/video/fbdev/kyrofb: Use arch_phys_wc_add() and pci_ioremap_wc_bar()
drivers/video/fbdev/i740fb: Use arch_phys_wc_add() and pci_ioremap_wc_bar()
PCI: Add pci_ioremap_wc_bar()
x86/mm: Make kernel/check.c explicitly non-modular
x86/mm/pat: Make mm/pageattr[-test].c explicitly non-modular
x86/mm/pat: Add comments to cachemode translation tables
arch/*/io.h: Add ioremap_uc() to all architectures
drivers/video/fbdev/atyfb: Use arch_phys_wc_add() and ioremap_wc()
drivers/video/fbdev/atyfb: Replace MTRR UC hole with strong UC
drivers/video/fbdev/atyfb: Clarify ioremap() base and length used
drivers/video/fbdev/atyfb: Carve out framebuffer length fudging into a helper
x86/mm, asm-generic: Add IOMMU ioremap_uc() variant default
...
This lets drivers take advantage of PAT when available. It
should help with the transition of converting video drivers over
to ioremap_wc() to help with the goal of eventually using
_PAGE_CACHE_UC over _PAGE_CACHE_UC_MINUS on x86 on
ioremap_nocache(), see:
de33c442ed ("x86 PAT: fix performance drop for glx, use UC minus for ioremap(), ioremap_nocache() and pci_mmap_page_range()")
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: <syrjala@sci.fi>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Antonino Daplas <adaplas@gmail.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Ville Syrjälä <syrjala@sci.fi>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: airlied@linux.ie
Cc: benh@kernel.crashing.org
Cc: dan.j.williams@intel.com
Cc: konrad.wilk@oracle.com
Cc: linux-fbdev@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: mst@redhat.com
Cc: vinod.koul@intel.com
Cc: xen-devel@lists.xensource.com
Link: http://lkml.kernel.org/r/1440443613-13696-2-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Firmware typically configures the PCIe fabric with a consistent Max Payload
Size setting based on the devices present at boot. A hot-added device
typically has the power-on default MPS setting (128 bytes), which may not
match the fabric.
The previous Linux default, in the absence of any "pci=pcie_bus_*" options,
was PCIE_BUS_TUNE_OFF, in which we never touch MPS, even for hot-added
devices.
Add a new default setting, PCIE_BUS_DEFAULT, in which we make sure every
device's MPS setting matches the upstream bridge. This makes it more
likely that a hot-added device will work in a system with optimized MPS
configuration.
Note that if we hot-add a device that only supports 128-byte MPS, it still
likely won't work because we don't reconfigure the rest of the fabric.
Booting with "pci=pcie_bus_peer2peer" is a workaround for this because it
sets MPS to 128 for everything.
[bhelgaas: changelog, new default, rework for pci_configure_device() path]
Tested-by: Keith Busch <keith.busch@intel.com>
Tested-by: Jordan Hargrave <jharg93@gmail.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
* pci/irq:
PCI/MSI: Free legacy IRQ when enabling MSI/MSI-X
PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed
PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()
PCI: Add pcibios_alloc_irq() and pcibios_free_irq()
* pci/misc:
PCI: Remove unused "pci_probe" flags
PCI: Add VPD function 0 quirk for Intel Ethernet devices
PCI: Add dev_flags bit to access VPD through function 0
PCI / ACPI: Fix pci_acpi_optimize_delay() comment
PCI: Remove a broken link in quirks.c
PCI: Remove useless redundant code
PCI: Simplify pci_find_(ext_)capability() return value checks
PCI: Move PCI_FIND_CAP_TTL to pci.h and use it in quirks
PCI: Add pcie_downstream_port() (true for Root and Switch Downstream Ports)
PCI: Fix pcie_port_device_resume() comment
PCI: Shift PCI_CLASS_NOT_DEFINED consistently with other classes
PCI: Revert aeb30016fe ("PCI: add Intel USB specific reset method")
PCI: Fix TI816X class code quirk
PCI: Fix generic NCR 53c810 class code quirk
PCI: Use PCI_CLASS_SERIAL_USB instead of bare number
PCI: Add quirk for Intersil/Techwell TW686[4589] AV capture cards
PCI: Remove Intel Cherrytrail D3 delays
* pci/resource:
PCI: Call pci_read_bridge_bases() from core instead of arch code
* pci/virtualization:
PCI: Restore ACS configuration as part of pci_restore_state()
Previously we did not restore ACS state after a PCIe reset. This meant
that we could not reassign interfaces after a system suspend because the
D0->D3 transition disabled ACS, and we didn't restore it when going back to
D0.
Restore ACS configuration in pci_restore_state().
[bhelgaas: changelog]
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Allen Kay <allen.m.kay@intel.com>
CC: Chris Wright <chris@sous-sol.org>
CC: Alex Williamson <alex.williamson@redhat.com>
Linus Torvalds