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2015-04-16Merge tag 'stable/for-linus-4.1-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tipLinus Torvalds1-2/+3
Pull xen features and fixes from David Vrabel: - use a single source list of hypercalls, generating other tables etc. at build time. - add a "Xen PV" APIC driver to support >255 VCPUs in PV guests. - significant performance improve to guest save/restore/migration. - scsiback/front save/restore support. - infrastructure for multi-page xenbus rings. - misc fixes. * tag 'stable/for-linus-4.1-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/pci: Try harder to get PXM information for Xen xenbus_client: Extend interface to support multi-page ring xen-pciback: also support disabling of bus-mastering and memory-write-invalidate xen: support suspend/resume in pvscsi frontend xen: scsiback: add LUN of restored domain xen-scsiback: define a pr_fmt macro with xen-pvscsi xen/mce: fix up xen_late_init_mcelog() error handling xen/privcmd: improve performance of MMAPBATCH_V2 xen: unify foreign GFN map/unmap for auto-xlated physmap guests x86/xen/apic: WARN with details. x86/xen: Provide a "Xen PV" APIC driver to support >255 VCPUs xen/pciback: Don't print scary messages when unsupported by hypervisor. xen: use generated hypercall symbols in arch/x86/xen/xen-head.S xen: use generated hypervisor symbols in arch/x86/xen/trace.c xen: synchronize include/xen/interface/xen.h with xen xen: build infrastructure for generating hypercall depending symbols xen: balloon: Use static attribute groups for sysfs entries xen: pcpu: Use static attribute groups for sysfs entry
2015-04-16Merge tag 'powerpc-4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linuxLinus Torvalds4-58/+196
Pull powerpc updates from Michael Ellerman: - Numerous minor fixes, cleanups etc. - More EEH work from Gavin to remove its dependency on device_nodes. - Memory hotplug implemented entirely in the kernel from Nathan Fontenot. - Removal of redundant CONFIG_PPC_OF by Kevin Hao. - Rewrite of VPHN parsing logic & tests from Greg Kurz. - A fix from Nish Aravamudan to reduce memory usage by clamping nodes_possible_map. - Support for pstore on powernv from Hari Bathini. - Removal of old powerpc specific byte swap routines by David Gibson. - Fix from Vasant Hegde to prevent the flash driver telling you it was flashing your firmware when it wasn't. - Patch from Ben Herrenschmidt to add an OPAL heartbeat driver. - Fix for an oops causing get/put_cpu_var() imbalance in perf by Jan Stancek. - Some fixes for migration from Tyrel Datwyler. - A new syscall to switch the cpu endian by Michael Ellerman. - Large series from Wei Yang to implement SRIOV, reviewed and acked by Bjorn. - A fix for the OPAL sensor driver from Cédric Le Goater. - Fixes to get STRICT_MM_TYPECHECKS building again by Michael Ellerman. - Large series from Daniel Axtens to make our PCI hooks per PHB rather than per machine. - Small patch from Sam Bobroff to explicitly abort non-suspended transactions on syscalls, plus a test to exercise it. - Numerous reworks and fixes for the 24x7 PMU from Sukadev Bhattiprolu. - Small patch to enable the hard lockup detector from Anton Blanchard. - Fix from Dave Olson for missing L2 cache information on some CPUs. - Some fixes from Michael Ellerman to get Cell machines booting again. - Freescale updates from Scott: Highlights include BMan device tree nodes, an MSI erratum workaround, a couple minor performance improvements, config updates, and misc fixes/cleanup. * tag 'powerpc-4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (196 commits) powerpc/powermac: Fix build error seen with powermac smp builds powerpc/pseries: Fix compile of memory hotplug without CONFIG_MEMORY_HOTREMOVE powerpc: Remove PPC32 code from pseries specific find_and_init_phbs() powerpc/cell: Fix iommu breakage caused by controller_ops change powerpc/eeh: Fix crash in eeh_add_device_early() on Cell powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH powerpc/perf/hv-24x7: Fail 24x7 initcall if create_events_from_catalog() fails powerpc/pseries: Correct memory hotplug locking powerpc: Fix missing L2 cache size in /sys/devices/system/cpu powerpc: Add ppc64 hard lockup detector support oprofile: Disable oprofile NMI timer on ppc64 powerpc/perf/hv-24x7: Add missing put_cpu_var() powerpc/perf/hv-24x7: Break up single_24x7_request powerpc/perf/hv-24x7: Define update_event_count() powerpc/perf/hv-24x7: Whitespace cleanup powerpc/perf/hv-24x7: Define add_event_to_24x7_request() powerpc/perf/hv-24x7: Rename hv_24x7_event_update powerpc/perf/hv-24x7: Move debug prints to separate function powerpc/perf/hv-24x7: Drop event_24x7_request() powerpc/perf/hv-24x7: Use pr_devel() to log message ... Conflicts: tools/testing/selftests/powerpc/Makefile tools/testing/selftests/powerpc/tm/Makefile
2015-04-15xenbus_client: Extend interface to support multi-page ringWei Liu1-2/+3
Originally Xen PV drivers only use single-page ring to pass along information. This might limit the throughput between frontend and backend. The patch extends Xenbus driver to support multi-page ring, which in general should improve throughput if ring is the bottleneck. Changes to various frontend / backend to adapt to the new interface are also included. Affected Xen drivers: * blkfront/back * netfront/back * pcifront/back * scsifront/back * vtpmfront The interface is documented, as before, in xenbus_client.c. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: Bob Liu <bob.liu@oracle.com> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-04-14Merge branch 'next-sriov' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into nextMichael Ellerman3-57/+195
Merge Richard's work to support SR-IOV on PowerNV. All generic PCI patches acked by Bjorn. Some minor conflicts with Daniel's pci_controller_ops work. Conflicts: arch/powerpc/include/asm/machdep.h arch/powerpc/platforms/powernv/pci-ioda.c
2015-04-13Merge tag 'pci-v4.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds25-62/+664
Pull PCI changes from Bjorn Helgaas: "Enumeration - Read capability list as dwords, not bytes (Sean O. Stalley) Resource management - Don't check for PNP overlaps with unassigned PCI BARs (Bjorn Helgaas) - Mark invalid BARs as unassigned (Bjorn Helgaas) - Show driver, BAR#, and resource on pci_ioremap_bar() failure (Bjorn Helgaas) - Fail pci_ioremap_bar() on unassigned resources (Bjorn Helgaas) - Assign resources before drivers claim devices (Yijing Wang) - Claim bus resources before pci_bus_add_devices() (Yijing Wang) Power management - Optimize device state transition delays (Aaron Lu) - Don't clear ASPM bits when the FADT declares it's unsupported (Matthew Garrett) Virtualization - Add ACS quirks for Intel 1G NICs (Alex Williamson) IOMMU - Add ptr to OF node arg to of_iommu_configure() (Murali Karicheri) - Move of_dma_configure() to device.c to help re-use (Murali Karicheri) - Fix size when dma-range is not used (Murali Karicheri) - Add helper functions pci_get[put]_host_bridge_device() (Murali Karicheri) - Add of_pci_dma_configure() to update DMA configuration (Murali Karicheri) - Update DMA configuration from DT (Murali Karicheri) - dma-mapping: limit IOMMU mapping size (Murali Karicheri) - Calculate device DMA masks based on DT dma-range size (Murali Karicheri) ARM Versatile host bridge driver - Check for devm_ioremap_resource() failures (Jisheng Zhang) Broadcom iProc host bridge driver - Add Broadcom iProc PCIe driver (Ray Jui) Marvell MVEBU host bridge driver - Add suspend/resume support (Thomas Petazzoni) Renesas R-Car host bridge driver - Fix position of MSI enable bit (Nobuhiro Iwamatsu) - Write zeroes to reserved PCIEPARL bits (Nobuhiro Iwamatsu) - Change PCIEPARL and PCIEPARH to PCIEPALR and PCIEPAUR (Nobuhiro Iwamatsu) - Verify that mem_res is 64K-aligned (Nobuhiro Iwamatsu) Samsung Exynos host bridge driver - Fix INTx enablement statement termination error (Jaehoon Chung) Miscellaneous - Make a shareable UUID for PCI firmware ACPI _DSM (Aaron Lu) - Clarify policy for vendor IDs in pci.txt (Michael S. Tsirkin)" * tag 'pci-v4.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (36 commits) PCI: Read capability list as dwords, not bytes PCI: layerscape: Simplify platform_get_resource_byname() failure checking PCI: keystone: Don't dereference possible NULL pointer PCI: versatile: Check for devm_ioremap_resource() failures PCI: Don't clear ASPM bits when the FADT declares it's unsupported PCI: Clarify policy for vendor IDs in pci.txt PCI/ACPI: Optimize device state transition delays PCI: Export pci_find_host_bridge() for use inside PCI core PCI: Make a shareable UUID for PCI firmware ACPI _DSM PCI: Fix typo in Thunderbolt kernel message PCI: exynos: Fix INTx enablement statement termination error PCI: iproc: Add Broadcom iProc PCIe support PCI: iproc: Add DT docs for Broadcom iProc PCIe driver PCI: Export symbols required for loadable host driver modules PCI: Add ACS quirks for Intel 1G NICs PCI: mvebu: Add suspend/resume support PCI: Cleanup control flow sparc/PCI: Claim bus resources before pci_bus_add_devices() PCI: Assign resources before drivers claim devices (pci_scan_root_bus()) PCI: Fail pci_ioremap_bar() on unassigned resources ...
2015-04-10Merge branch 'pci/misc' into nextBjorn Helgaas7-35/+98
* pci/misc: PCI: Read capability list as dwords, not bytes PCI: Don't clear ASPM bits when the FADT declares it's unsupported PCI: Clarify policy for vendor IDs in pci.txt PCI/ACPI: Optimize device state transition delays PCI: Export pci_find_host_bridge() for use inside PCI core PCI: Make a shareable UUID for PCI firmware ACPI _DSM PCI: Fix typo in Thunderbolt kernel message
2015-04-10Merge branches 'pci/host-exynos', 'pci/host-iproc', 'pci/host-keystone', 'pci/host-layerscape', 'pci/host-mvebu', 'pci/host-rcar' and 'pci/host-versatile' into nextBjorn Helgaas17-19/+504
* pci/host-exynos: PCI: exynos: Fix INTx enablement statement termination error * pci/host-iproc: PCI: iproc: Add Broadcom iProc PCIe support PCI: iproc: Add DT docs for Broadcom iProc PCIe driver PCI: Export symbols required for loadable host driver modules * pci/host-keystone: PCI: keystone: Don't dereference possible NULL pointer * pci/host-layerscape: PCI: layerscape: Simplify platform_get_resource_byname() failure checking * pci/host-mvebu: PCI: mvebu: Add suspend/resume support * pci/host-rcar: PCI: rcar: Verify that mem_res is 64K-aligned PCI: rcar: Change PCIEPARL and PCIEPARH to PCIEPALR and PCIEPAUR PCI: rcar: Write zeroes to reserved PCIEPARL bits PCI: rcar: Fix position of MSI enable bit * pci/host-versatile: PCI: versatile: Check for devm_ioremap_resource() failures
2015-04-09PCI: Read capability list as dwords, not bytesSean O. Stalley1-4/+7
Reading both the capability ID and "next" pointer at the same time lets us parse the list with half the number of config reads. Signed-off-by: Sean O. Stalley <sean.stalley@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-09PCI: layerscape: Simplify platform_get_resource_byname() failure checkingBjorn Helgaas1-6/+3
devm_ioremap_resource() validates the resource it receives, so if we check for devm_ioremap_resource() failure, we need not check for failure of the preceding platform_get_resource(). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-09PCI: keystone: Don't dereference possible NULL pointerBjorn Helgaas1-1/+2
Check for failure from platform_get_resource() (this check actually happens inside devm_ioremap_resource()) before dereferencing the pointer returned from platform_get_resource(). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-09PCI: versatile: Check for devm_ioremap_resource() failuresJisheng Zhang1-6/+6
Check for failure of devm_ioremap_resource(). devm_ioremap_resource() validates the resource it receives, so if we check for devm_ioremap_resource() failure, we need not check for failure of the preceding platform_get_resource(). [bhelgaas: changelog] Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-09PCI: Don't clear ASPM bits when the FADT declares it's unsupportedMatthew Garrett1-18/+0
Communications with a hardware vendor confirm that the expected behaviour on systems that set the FADT ASPM disable bit but which still grant full PCIe control is for the OS to leave any BIOS configuration intact and refuse to touch the ASPM bits. This mimics the behaviour of Windows. Signed-off-by: Matthew Garrett <mjg59@coreos.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-09Merge tag 'pci-v4.0-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds5-15/+11
Pull PCI fixes from Bjorn Helgaas: "Here are some fixes for v4.0. I apologize for how late they are. We were hoping for some better fixes, but couldn't get them polished in time. These fix: - a Xen domU oops with PCI passthrough devices - a sparc T5 boot failure - a STM SPEAr13xx crash (use after initdata freed) - a cpcihp hotplug driver thinko - an AER thinko that printed stack junk Details: Enumeration - Don't look for ACPI hotplug parameters if ACPI is disabled (Bjorn Helgaas) Resource management - Revert "sparc/PCI: Clip bridge windows to fit in upstream windows" (Bjorn Helgaas) AER - Avoid info leak in __print_tlp_header() (Rasmus Villemoes) PCI device hotplug - Add missing curly braces in cpci_configure_slot() (Dan Carpenter) ST Microelectronics SPEAr13xx host bridge driver - Drop __initdata from spear13xx_pcie_driver (Matwey V. Kornilov) * tag 'pci-v4.0-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: Revert "sparc/PCI: Clip bridge windows to fit in upstream windows" PCI: Don't look for ACPI hotplug parameters if ACPI is disabled PCI: cpcihp: Add missing curly braces in cpci_configure_slot() PCI/AER: Avoid info leak in __print_tlp_header() PCI: spear: Drop __initdata from spear13xx_pcie_driver
2015-04-08PCI/ACPI: Optimize device state transition delaysAaron Lu1-0/+74
The PCI "ACPI additions for FW latency optimizations" ECN (link below) defines two functions in the PCI _DSM: Function 8, "Reset Delay," applies to the entire hierarchy below a PCI host bridge. If it returns one, the OS may assume that all devices in the hierarchy have already completed power-on reset delays. Function 9, "Device Readiness Durations," applies only to the object where it is located. It returns delay durations required after various events if the device requires less time than the spec requires. Delays from this function take precedence over the Reset Delay function. Add support for Reset Delay and part of Device Readiness Durations. [bhelgaas: changelog, comments] Link: https://www.pcisig.com/specifications/conventional/pci_firmware/ECN_fw_latency_optimization_final.pdf Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-08PCI: Export pci_find_host_bridge() for use inside PCI coreAaron Lu2-3/+5
The find_pci_host_bridge() function can be useful to other PCI code so export it. Change its name to pci_find_host_bridge(). Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-08PCI: Make a shareable UUID for PCI firmware ACPI _DSMAaron Lu2-9/+11
The PCI Firmware Specification, r3.0, sec 4.6.4.1.3, defines a single UUID for an ACPI _DSM method to provide device-specific control functions. This _DSM method support several functions, including PCI Express Slot Information, PCI Express Slot Number, PCI Bus Capabilities, etc. Move the UUID definition from pci/pci-label.c, where it could be used only for one function, to pci/pci-acpi.c where it can be shared for all these functions. [bhelgaas: changelog] Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-08PCI: Fix typo in Thunderbolt kernel messageDarrick J. Wong1-1/+1
Fix a typo in one of the kernel messages. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-08PCI: exynos: Fix INTx enablement statement termination errorJaehoon Chung1-1/+1
Use a semicolon, not a comma, to terminate a statement. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-04-08PCI: iproc: Add Broadcom iProc PCIe supportRay Jui5-0/+439
Add support for the Broadcom iProc PCIe controller. pcie-iproc.c is the common core driver, and a front-end bus interface needs to be added to support different bus interfaces. pcie-iproc-platform.c contains the support for the platform bus interface. Signed-off-by: Ray Jui <rjui@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Scott Branden <sbranden@broadcom.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2015-04-08PCI: Export symbols required for loadable host driver modulesRay Jui5-0/+6
Export the following symbols so they can be referenced by a PCI host bridge driver compiled as a kernel loadable module: pci_common_swizzle pci_create_root_bus pci_stop_root_bus pci_remove_root_bus pci_assign_unassigned_bus_resources pci_fixup_irqs Signed-off-by: Ray Jui <rjui@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2015-04-08PCI: Don't look for ACPI hotplug parameters if ACPI is disabledBjorn Helgaas1-0/+3
Booting a v3.18 or newer Xen domU kernel with PCI devices passed through results in an oops (this is a 32-bit 3.13.11 dom0 with a 64-bit 4.4.0 hypervisor and 32-bit domU): BUG: unable to handle kernel paging request at 0030303e IP: [<c06ed0e6>] acpi_ns_validate_handle+0x12/0x1a Call Trace: [<c06eda4d>] ? acpi_evaluate_object+0x31/0x1fc [<c06b78e1>] ? pci_get_hp_params+0x111/0x4e0 [<c0407bc7>] ? xen_force_evtchn_callback+0x17/0x30 [<c04085fb>] ? xen_restore_fl_direct_reloc+0x4/0x4 [<c0699d34>] ? pci_device_add+0x24/0x450 Don't look for ACPI configuration information if ACPI has been disabled. I don't think this is the best fix, because we can boot plain Linux (no Xen) with "acpi=off", and we don't need this check in pci_get_hp_params(). There should be a better fix that would make Xen domU work the same way. The domU kernel has ACPI support but it has no AML. There should be a way to initialize the ACPI data structures so things fail gracefully rather than oopsing. This is an interim fix to address the regression. Fixes: 6cd33649fa83 ("PCI: Add pci_configure_device() during enumeration") Link: https://bugzilla.kernel.org/show_bug.cgi?id=96301 Reported-by: Michael D Labriola <mlabriol@gdeb.com> Tested-by: Michael D Labriola <mlabriol@gdeb.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.18+
2015-04-07Merge branch 'next-eeh' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into nextMichael Ellerman1-1/+1
2015-03-31PCI: Consider additional PF's IOV BAR alignment in sizing and assigningWei Yang1-16/+79
When sizing and assigning resources, we divide the resources into two lists: the requested list and the additional list. We don't consider the alignment of additional VF(n) BAR space. This is because the alignment required for the VF(n) BAR space is the size of an individual VF BAR, not the size of the space for *all* VFs. But we want additional alignment to support partitioning on PowerNV. Consider the additional IOV BAR alignment when sizing and assigning resources. When there is not enough system MMIO space to accomodate both the requested list and the additional list, the PF's IOV BAR alignment will not contribute to the bridge. When there is enough system MMIO space for both lists, the additional alignment will contribute to the bridge. The additional alignment is stored in the min_align of pci_dev_resource, which is stored in the additional list by add_to_list() at the end of pbus_size_mem(). The additional alignment is calculated in pci_resource_alignment(). For an IOV BAR, we have arch dependent function to get the alignment for different arch. [bhelgaas: changelog, printk cast] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Add pcibios_iov_resource_alignment() interfaceWei Yang1-1/+7
Per the SR-IOV spec r1.1, sec 3.3.14, the required alignment of a PF's IOV BAR is the size of an individual VF BAR, and the size consumed is the individual VF BAR size times NumVFs. The PowerNV platform has additional alignment requirements to help support its Partitionable Endpoint device isolation feature (see Documentation/powerpc/pci_iov_resource_on_powernv.txt). Add a pcibios_iov_resource_alignment() interface to allow platforms to request additional alignment. [bhelgaas: changelog, adapt to reworked pci_sriov_resource_alignment(), drop "align" parameter] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Add pcibios_sriov_enable() and pcibios_sriov_disable()Wei Yang1-0/+19
VFs are dynamically created when a driver enables them. On some platforms, like PowerNV, special resources are necessary to enable VFs. Add platform hooks for enabling and disabling VFs. Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Export pci_iov_virtfn_bus() and pci_iov_virtfn_devfn()Wei Yang1-12/+16
On PowerNV, some resource reservation is needed for SR-IOV VFs that don't exist at the bootup stage. To do the match between resources and VFs, the code need to get the VF's BDF in advance. Rename virtfn_bus() and virtfn_devfn() to pci_iov_virtfn_bus() and pci_iov_virtfn_devfn() and export them. [bhelgaas: changelog, make "busnr" int] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Calculate maximum number of buses required for VFsWei Yang2-4/+28
An SR-IOV device can change its First VF Offset and VF Stride based on the values of ARI Capable Hierarchy and NumVFs. The number of buses required for all VFs is determined by NumVFs, First VF Offset, and VF Stride (see SR-IOV spec r1.1, sec 2.1.2). Previously pci_iov_bus_range() computed how many buses would be required by TotalVFs, but this was based on a single NumVFs value and may not have been the maximum for all NumVFs configurations. Iterate over all valid NumVFs and calculate the maximum number of bus numbers that could ever be required for VFs of this device. [bhelgaas: changelog, compute busnr of NumVFs, not TotalVFs, remove kerenl-doc comment marker] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Refresh First VF Offset and VF Stride when updating NumVFsWei Yang1-4/+19
The First VF Offset and VF Stride fields depend on the NumVFs setting, so refresh the cached fields in struct pci_sriov when updating NumVFs. See the SR-IOV spec r1.1, sec 3.3.9 and 3.3.10. [bhelgaas: changelog, remove kernel-doc comment marker] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Index IOV resources in the conventional styleBjorn Helgaas1-4/+4
Most of PCI uses "res = &dev->resource[i]", not "res = dev->resource + i". Use that style in iov.c also. No functional change. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Wei Yang <weiyang@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Keep individual VF BAR size in struct pci_sriovWei Yang2-19/+21
Currently we don't store the individual VF BAR size. We calculate it when needed by dividing the PF's IOV resource size (which contains space for *all* the VFs) by total_VFs or by reading the BAR in the SR-IOV capability again. Keep the individual VF BAR size in struct pci_sriov.barsz[], add pci_iov_resource_size() to retrieve it, and use that instead of doing the division or reading the SR-IOV capability BAR. [bhelgaas: rename to "barsz[]", simplify barsz[] index computation, remove SR-IOV capability BAR sizing] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Print PF SR-IOV resource that contains all VF(n) BAR spaceWei Yang1-0/+2
When we size VF BAR0, VF BAR1, etc., from the SR-IOV Capability of a PF, we learn the alignment requirement and amount of space consumed by a single VF. But when VFs are enabled, *each* of the NumVFs consumes that amount of space, so the total size of the PF resource is "VF BAR size * NumVFs". Add a printk of the total space consumed by the VFs corresponding to what we already do for normal non-IOV BARs. No functional change; new message only. [bhelgaas: split out into its own patch] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-31PCI: Print more info in sriov_enable() error messageBjorn Helgaas1-2/+5
If we don't have space for all the bus numbers required to enable VFs, print the largest bus number required and the range available. No functional change; improved error message only. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Wei Yang <weiyang@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-24powerpc/eeh: Do probe on pci_dnGavin Shan1-1/+1
Originally, EEH core probes on device_node or pci_dev to populate EEH devices and PEs, which conflicts with the fact: SRIOV VFs are usually enabled and created by PF's driver and they don't have the corresponding device_nodes. Instead, SRIOV VFs have dynamically created pci_dn, which can be used for EEH probe. The patch reworks EEH probe for PowerNV and pSeries platforms to do probing based on pci_dn, instead of pci_dev or device_node any more. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2015-03-23Merge branches 'pci/enumeration' and 'pci/virtualization' into nextBjorn Helgaas4-4/+39
* pci/enumeration: PCI: Cleanup control flow sparc/PCI: Claim bus resources before pci_bus_add_devices() PCI: Assign resources before drivers claim devices (pci_scan_root_bus()) PCI: Assign resources before drivers claim devices (pci_scan_bus()) * pci/virtualization: PCI: Add ACS quirks for Intel 1G NICs
2015-03-23PCI: Add ACS quirks for Intel 1G NICsAlex Williamson1-0/+32
Intel has verified that there is no peer-to-peer between functions for the below selection of 82580, 82576, 82575, I350, and 82571 multi-port devices. This adds the necessary quirks to consider the functions isolated from each other. 82571 quad-port devices are omitted due to likely lack of ACS/isolation in the onboard switch, rendering quirks for the downstream endpoints useless. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: John Ronciak <john.ronciak@intel.com>
2015-03-20PCI: mvebu: Add suspend/resume supportThomas Petazzoni1-0/+38
Add suspend/resume support for the mvebu PCIe host driver. Without this commit, the system will panic at resume time when PCIe devices are connected. Note that we have to use the ->suspend_noirq() and ->resume_noirq() hooks, because at resume time, the PCI fixups are done at ->resume_noirq() time, so the PCIe controller has to be ready at this point. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Jason Cooper <jason@lakedaemon.net>
2015-03-19Merge branches 'pci/iommu' and 'pci/resource' into nextBjorn Helgaas4-4/+23
* pci/iommu: of: Calculate device DMA masks based on DT dma-range size arm: dma-mapping: limit IOMMU mapping size PCI: Update DMA configuration from DT of/pci: Add of_pci_dma_configure() to update DMA configuration PCI: Add helper functions pci_get[put]_host_bridge_device() of: Fix size when dma-range is not used of: Move of_dma_configure() to device.c to help re-use of: iommu: Add ptr to OF node arg to of_iommu_configure() * pci/resource: PCI: Fail pci_ioremap_bar() on unassigned resources PCI: Show driver, BAR#, and resource on pci_ioremap_bar() failure PCI: Mark invalid BARs as unassigned PNP: Don't check for overlaps with unassigned PCI BARs
2015-03-19PCI: Assign resources before drivers claim devices (pci_scan_root_bus())Yijing Wang2-1/+1
Previously, pci_scan_root_bus() created a root PCI bus, enumerated the devices on it, and called pci_bus_add_devices(), which made the devices available for drivers to claim them. Most callers assigned resources to devices after pci_scan_root_bus() returns, which may be after drivers have claimed the devices. This is incorrect; the PCI core should not change device resources while a driver is managing the device. Remove pci_bus_add_devices() from pci_scan_root_bus() and do it after any resource assignment in the callers. Note that ARM's pci_common_init_dev() already called pci_bus_add_devices() after pci_scan_root_bus(), so we only need to remove the first call: pci_common_init_dev pcibios_init_hw pci_scan_root_bus pci_bus_add_devices # first call pci_bus_assign_resources pci_bus_add_devices # second call [bhelgaas: changelog, drop "root_bus" var in alpha common_init_pci(), return failure earlier in mn10300, add "return" in x86 pcibios_scan_root(), return early if xtensa platform_pcibios_fixup() fails] Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Richard Henderson <rth@twiddle.net> CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru> CC: Matt Turner <mattst88@gmail.com> CC: David Howells <dhowells@redhat.com> CC: Tony Luck <tony.luck@intel.com> CC: Michal Simek <monstr@monstr.eu> CC: Ralf Baechle <ralf@linux-mips.org> CC: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> CC: Sebastian Ott <sebott@linux.vnet.ibm.com> CC: "David S. Miller" <davem@davemloft.net> CC: Chris Metcalf <cmetcalf@ezchip.com> CC: Chris Zankel <chris@zankel.net> CC: Max Filippov <jcmvbkbc@gmail.com> CC: Thomas Gleixner <tglx@linutronix.de>
2015-03-12PCI: Fail pci_ioremap_bar() on unassigned resourcesBjorn Helgaas1-1/+1
Make pci_ioremap_bar() fail if we're trying to map a BAR that hasn't been assigned. Normally pci_enable_device() will fail if a BAR hasn't been assigned, but a driver can successfully call pci_enable_device_io() even if a memory BAR hasn't been assigned. That driver should not be able to use pci_ioremap_bar() to map that unassigned memory BAR. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-12PCI: Show driver, BAR#, and resource on pci_ioremap_bar() failureBjorn Helgaas1-4/+5
Use dev_warn() to complain about a pci_ioremap_bar() failure so we can include the driver name, BAR number, and the resource itself. We could use dev_WARN() to also get the backtrace as we did previously, but I think that's more information than we need. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-12PCI: Mark invalid BARs as unassignedBjorn Helgaas1-0/+2
If a BAR is not inside any upstream bridge window, or if it conflicts with another resource, mark it as IORESOURCE_UNSET so we don't try to use it. We may be able to assign a different address for it. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-12PCI: Assign resources before drivers claim devices (pci_scan_bus())Yijing Wang2-3/+6
Previously, pci_scan_bus() created a root PCI bus, enumerated the devices on it, and called pci_bus_add_devices(), which made the devices available for drivers to claim them. Most callers assigned resources to devices after pci_scan_bus() returns, which may be after drivers have claimed the devices. This is incorrect; the PCI core should not change device resources while a driver is managing the device. Remove pci_bus_add_devices() from pci_scan_bus() and do it after any resource assignment in the callers. [bhelgaas: changelog, check for failure in mcf_pci_init()] Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: "David S. Miller" <davem@davemloft.net> CC: Geert Uytterhoeven <geert@linux-m68k.org> CC: Guan Xuetao <gxt@mprc.pku.edu.cn> CC: Richard Henderson <rth@twiddle.net> CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru> CC: Matt Turner <mattst88@gmail.com>
2015-03-12Merge tag 'pci-v4.0-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds2-4/+5
Pull PCI fixes from Bjorn Helgaas: "Here are a couple updates for v4.0. One fixes a config accessor problem on APM X-Gene that we introduced when switching to generic config accessors, and the other fixes an older read-past-end-of-buffer problem in sysfs. APM X-Gene host bridge driver - Add register offset to config space base address (Feng Kan) Miscellaneous - Don't read past the end of sysfs "driver_override" buffer (Sasha Levin)" * tag 'pci-v4.0-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: PCI: xgene: Add register offset to config space base address PCI: Don't read past the end of sysfs "driver_override" buffer
2015-03-12PCI: Update DMA configuration from DTMurali Karicheri1-0/+2
If there is a DT node available for the root bridge's parent device, use the DMA configuration from that device node. For example, Keystone PCI devices would require dma_pfn_offset to be set correctly in the device structure of the PCI device in order to have the correct DMA mask. The DT node will have dma-ranges defined for this. Also support using the DT property dma-coherent to allow coherent DMA operation by the PCI device. Use the new helper function of_pci_dma_configure() to update the device DMA configuration. This fixes DMA on systems where DMA addresses are a constant offset from CPU physical addresses. Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> (AMD Seattle) Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> CC: Joerg Roedel <joro@8bytes.org> CC: Grant Likely <grant.likely@linaro.org> CC: Rob Herring <robh+dt@kernel.org> CC: Russell King <linux@arm.linux.org.uk> CC: Arnd Bergmann <arnd@arndb.de>
2015-03-12PCI: cpcihp: Add missing curly braces in cpci_configure_slot()Dan Carpenter1-1/+2
I don't have this hardware but it looks like we weren't adding bridge devices as intended. Maybe the bridge is always the last device? Fixes: 05b125004815 ("PCI: cpcihp: Iterate over all devices in slot, not functions 0-7") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Yijing Wang <wangyijing@huawei.com> CC: stable@vger.kernel.org # v3.9+
2015-03-06PCI/AER: Avoid info leak in __print_tlp_header()Rasmus Villemoes1-10/+2
Commit fab4c256a58b ("PCI/AER: Add a TLP header print helper") introduced the helper function __print_tlp_header(), but contrary to the intention, the behaviour did change: Since we're taking the address of the parameter t, the first 4 or 8 bytes printed will be the value of the pointer t itself, and the remaining 12 or 8 bytes will be who-knows-what (something from the stack). We want to show the values of the four members of the struct aer_header_log_regs; that can be done without ugly and error-prone casts. On little-endian this should produce the same output as originally intended, and since no-one has complained about getting garbage output so far, I think big-endian should be ok too. Fixes: fab4c256a58b ("PCI/AER: Add a TLP header print helper") Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Borislav Petkov <bp@suse.de> CC: stable@vger.kernel.org # v3.14+
2015-03-06PCI: spear: Drop __initdata from spear13xx_pcie_driverMatwey V. Kornilov2-4/+4
Struct spear13xx_pcie_driver was in initdata, but we passed a pointer to it to platform_driver_register(), which can use the pointer at arbitrary times in the future, even after the initdata is freed. That leads to crashes. Move spear13xx_pcie_driver and things referenced by it (spear13xx_pcie_probe() and dw_pcie_host_init()) out of initdata. [bhelgaas: changelog] Fixes: 6675ef212dac ("PCI: spear: Fix Section mismatch compilation warning for probe()") Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> CC: stable@vger.kernel.org # v3.17+
2015-03-05PCI: xgene: Add register offset to config space base addressFeng Kan1-2/+2
In xgene_pcie_map_bus(), we neglected to add in the register offset when calculating the config space address. This means all config accesses operated on the first four bytes of config space. Add the register offset to the config space base address. Also correct the xgene_pcie_map_bus() prototype to fix a compiler warning. [bhelgaas: changelog] Fixes: 350f8be5bb40 ("PCI: xgene: Convert to use generic config accessors") Posting: http://lkml.kernel.org/r/1424214840-26498-1-git-send-email-fkan@apm.com Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Tanmay Inamdar <tinamdar@apm.com> Acked-by: Rob Herring <robh@kernel.org>
2015-03-03PCI: Add helper functions pci_get[put]_host_bridge_device()Murali Karicheri1-0/+14
Add helper functions to get/put the root bus's host bridge device. Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> (AMD Seattle) Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> CC: Joerg Roedel <joro@8bytes.org> CC: Grant Likely <grant.likely@linaro.org> CC: Rob Herring <robh+dt@kernel.org> CC: Russell King <linux@arm.linux.org.uk> CC: Arnd Bergmann <arnd@arndb.de>
2015-02-28PCI: versatile: Update for list_for_each_entry() API changeJoachim Nilsson1-1/+1
In Linux 4.0-rc1 ARM Versatile PCI build fails to build due to what appears to be an API update. This patch is a very simple correction, merely posted as a heads-up to the maintainers. Hopefully a better fix can be forwarded to Linus. [ arnd: the patch actually looks correct, so let's take this version ] Signed-off-by: Joachim Nilsson <troglobit@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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