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2017-07-03Merge branch 'pci/host-imx6' into nextBjorn Helgaas
* pci/host-imx6: PCI: imx6: Add regulator support
2017-07-03Merge branch 'pci/host-hv' into nextBjorn Helgaas
* pci/host-hv: PCI: hv: Use vPCI protocol version 1.2 PCI: hv: Add vPCI version protocol negotiation PCI: hv: Temporary own CPU-number-to-vCPU-number infra PCI: hv: Use page allocation for hbus structure PCI: hv: Fix comment formatting and use proper integer fields
2017-07-03Merge branch 'pci/host-faraday' into nextBjorn Helgaas
* pci/host-faraday: PCI: faraday: Add clock handling PCI: faraday: Add clock bindings
2017-07-03Merge branch 'pci/host-dra7xx' into nextBjorn Helgaas
* pci/host-dra7xx: PCI: dwc: dra7xx: Use RW1C for IRQSTATUS_MSI and IRQSTATUS_MAIN PCI: dwc: dra7xx: Depend on appropriate SoC or compile test
2017-07-03Merge branch 'pci/host-designware' into nextBjorn Helgaas
* pci/host-designware: PCI: dwc: Constify dw_pcie_host_ops structures PCI: host: Mark PCIe/PCI (MSI) cascade ISR as IRQF_NO_THREAD
2017-07-03Merge branch 'pci/irq-fixups' into nextBjorn Helgaas
* pci/irq-fixups: arm64: PCI: Drop DT IRQ allocation from pcibios_alloc_irq() PCI: xilinx-nwl: Move to struct pci_host_bridge IRQ mapping functions PCI: rockchip: Move to struct pci_host_bridge IRQ mapping functions PCI: xgene: Move to struct pci_host_bridge IRQ mapping functions PCI: altera: Drop pci_fixup_irqs() PCI: versatile: Drop pci_fixup_irqs() PCI: generic: Drop pci_fixup_irqs() PCI: faraday: Drop pci_fixup_irqs() PCI: designware: Drop pci_fixup_irqs() PCI: iproc: Drop pci_fixup_irqs() PCI: rcar: Drop pci_fixup_irqs() PCI: xilinx: Drop pci_fixup_irqs() PCI: tegra: Drop pci_fixup_irqs() ARM/PCI: Remove pci_fixup_irqs() call for bios32 host controllers PCI: Add a call to pci_assign_irq() in pci_device_probe() OF/PCI: Update of_irq_parse_and_map_pci() comment PCI: Add pci_assign_irq() function and have pci_fixup_irqs() use it PCI: Add IRQ mapping function pointers to pci_host_bridge struct PCI: Build setup-irq.o on all arches PCI: Remove pci_scan_root_bus_msi() PCI: xilinx-nwl: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: rockchip: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: generic: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: xgene: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: xilinx: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: altera: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: versatile: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: iproc: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: rcar: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: aardvark: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: designware: Convert PCI scan API to pci_scan_root_bus_bridge() ARM/PCI: Convert PCI scan API to pci_scan_root_bus_bridge() PCI: Make pci_register_host_bridge() PCI core internal PCI: Add pci_scan_root_bus_bridge() interface PCI: tegra: Fix host bridge memory leakage PCI: faraday: Fix host bridge memory leakage PCI: Add devm_pci_alloc_host_bridge() interface PCI: Add pci_free_host_bridge() interface PCI: Initialize bridge release function at bridge allocation PCI: faraday: Convert IRQ masking to raw PCI config accessors PCI: iproc: Convert link check to raw PCI config accessors PCI: xilinx-nwl: Remove nwl_pcie_enable_msi() unused bus parameter
2017-07-03Merge branch 'pci/virtualization' into nextBjorn Helgaas
* pci/virtualization: PCI: Remove __pci_dev_reset() and pci_dev_reset() PCI: Split ->reset_notify() method into ->reset_prepare() and ->reset_done() PCI: Protect pci_error_handlers->reset_notify() usage with device_lock() PCI: Protect pci_driver->sriov_configure() usage with device_lock() PCI: Mark Intel XXV710 NIC INTx masking as broken PCI: Restore PRI and PASID state after Function-Level Reset PCI: Cache PRI and PASID bits in pci_dev
2017-07-03PCI: Remove __pci_dev_reset() and pci_dev_reset()Christoph Hellwig
Implement the reset probing / reset chain directly in __pci_probe_reset_function() and __pci_reset_function_locked() respectively. Link: http://lkml.kernel.org/r/20170601111039.8913-4-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-03PCI: Split ->reset_notify() method into ->reset_prepare() and ->reset_done()Christoph Hellwig
The pci_error_handlers->reset_notify() method had a flag to indicate whether to prepare for or clean up after a reset. The prepare and done cases have no shared functionality whatsoever, so split them into separate methods. [bhelgaas: changelog, update locking comments] Link: http://lkml.kernel.org/r/20170601111039.8913-3-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02Merge branch 'pci/switchtec' into nextBjorn Helgaas
* pci/switchtec: switchtec: Add device IDs for additional Switchtec products switchtec: Add "running" status flag to fw partition info ioctl
2017-07-02Merge branch 'pci/resource' into nextBjorn Helgaas
* pci/resource: PCI: Work around poweroff & suspend-to-RAM issue on Macbook Pro 11 PCI: Do not disregard parent resources starting at 0x0 Conflicts: arch/x86/pci/fixup.c
2017-07-02Merge branch 'pci/portdrv' into nextBjorn Helgaas
* pci/portdrv: PCI/portdrv: Allocate MSI/MSI-X vector for Downstream Port Containment PCI/portdrv: Support multiple interrupts for MSI as well as MSI-X
2017-07-02Merge branch 'pci/pm' into nextBjorn Helgaas
* pci/pm: PCI/PM: Avoid using device_may_wakeup() for runtime PM x86/PCI: Avoid AMD SB7xx EHCI USB wakeup defect PCI/PM: Restore the status of PCI devices across hibernation drm/radeon: make MacBook Pro d3_delay quirk more generic drm/amdgpu: remove unnecessary save/restore of pdev->d3_delay PCI/PM: Add needs_resume flag to avoid suspend complete optimization PCI: imx6: Fix config read timeout handling switchtec: Fix minor bug with partition ID register switchtec: Use new cdev_device_add() helper function PCI: endpoint: Make PCI_ENDPOINT depend on HAS_DMA
2017-07-02Merge branch 'pci/msi' into nextBjorn Helgaas
* pci/msi: PCI/MSI: Ignore affinity if pre/post vector count is more than min_vecs
2017-07-02Merge branch 'pci/misc' into nextBjorn Helgaas
* pci/misc: x86/PCI: Simplify Dell DMI B1 quirk PCI: Add domain number check to find_smbios_instance_string() x86/PCI: Fix whitespace in set_bios_x() printk PCI: Correct PCI_STD_RESOURCE_END usage efi/fb: Correct PCI_STD_RESOURCE_END usage MIPS: PCI: Remove unused busn_offset MIPS: Loongson: Remove unused PCI_BAR_COUNT definition
2017-07-02Merge branch 'pci/enumeration' into nextBjorn Helgaas
* pci/enumeration: PCI: Enable ECRC only if device supports it PCI: Add sysfs max_link_speed/width, current_link_speed/width, etc PCI: Test INTx masking during enumeration, not at run-time
2017-07-02Merge branch 'pci/dpc' into nextBjorn Helgaas
* pci/dpc: PCI/DPC: Fix control register setting PCI/DPC: Skip DPC event if device is not present
2017-07-02PCI: imx6: Add regulator supportQuentin Schulz
Some boards might require to control a regulator to power the PCIe port. Add support for an optional regulator defined in Device Tree linked in the PCIe controller under `vpcie-supply`. If present, the regulator will be disabled and then enabled as part of the PCIe host initialization process and will be disabled when shutting down. Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> [bhelgaas: use dev_err() instead of pr_err() in imx6_pcie_assert_core_reset()] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Richard Zhu <hongxing.zhu@nxp.com>
2017-07-02PCI: hv: Use vPCI protocol version 1.2Jork Loeser
Update the Hyper-V vPCI driver to use the Server-2016 version of the vPCI protocol, fixing MSI creation and retargeting issues. Signed-off-by: Jork Loeser <jloeser@microsoft.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com>
2017-07-02PCI: hv: Add vPCI version protocol negotiationJork Loeser
Hyper-V vPCI offers different protocol versions. Add the infra for negotiating the one to use. Signed-off-by: Jork Loeser <jloeser@microsoft.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com>
2017-07-02PCI: hv: Temporary own CPU-number-to-vCPU-number infraJork Loeser
To ease parallel effort to centralize CPU-number-to-vCPU-number conversion, temporarily stand up own version, file-local hv_tmp_cpu_nr_to_vp_nr(). Once the changes have merged, this work-around can be removed, and the calls replaced with hv_cpu_number_to_vp_number(). Signed-off-by: Jork Loeser <jloeser@microsoft.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com>
2017-07-02PCI: hv: Use page allocation for hbus structureJork Loeser
The hv_pcibus_device structure contains an in-memory hypercall argument that must not cross a page boundary. Allocate the structure as a page to ensure that. Signed-off-by: Jork Loeser <jloeser@microsoft.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com>
2017-07-02PCI: hv: Fix comment formatting and use proper integer fieldsJork Loeser
Fix comment formatting and use proper integer fields. Signed-off-by: Jork Loeser <jloeser@microsoft.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com>
2017-07-02PCI: faraday: Add clock handlingLinus Walleij
Add some optional clock handling to the Faraday FTPCI100. We just get and prepare+enable the clocks right now, if they exist. We can add more elaborate clock handling later. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [bhelgaas: folded in "Make clocks compulsory" fix from http://lkml.kernel.org/r/20170621085730.28804-1-linus.walleij@linaro.org Also folded in the clock max/cur speed fixes from http://lkml.kernel.org/r/20170621162651.25315-1-linus.walleij@linaro.org] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02PCI: faraday: Add clock bindingsLinus Walleij
The Faraday FTPCI100 controller has two clock ports, PCLK and PCICLK. Add bindings for these two clocks so we can assign them in the device tree. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rob Herring <robh@kernel.org>
2017-07-02PCI: dwc: dra7xx: Use RW1C for IRQSTATUS_MSI and IRQSTATUS_MAINArvind Yadav
Previously, we tried to clear interrupt requests by clearing bits in the PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI and PCIECTRL_DRA7XX_CONF_IRQSTATUS_MAIN registers. But per the TRM, these fields are RW1C, so we must *set* bits to clear the interrupt bits. Fixes: 47ff3de911a7 ("PCI: dra7xx: Add TI DRA7xx PCIe driver") Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2017-07-02PCI: dwc: dra7xx: Depend on appropriate SoC or compile testPeter Robinson
The PCI controller attached to a SoC isn't much use if the core SoC isn't enabled, unless of course it's compile testing, so add appropriate dependency. Signed-off-by: Peter Robinson <pbrobinson@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2017-07-02PCI: dwc: Constify dw_pcie_host_ops structuresJisheng Zhang
The dw_pcie_host_ops structures are never modified. Constify these structures such that these can be write-protected. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Jingoo Han <jingoohan1@gmail.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2017-07-02PCI: host: Mark PCIe/PCI (MSI) cascade ISR as IRQF_NO_THREADJisheng Zhang
Similar as commit 8ff0ef996ca0 ("PCI: host: Mark PCIe/PCI (MSI) IRQ cascade handlers as IRQF_NO_THREAD"), we should mark PCIe/PCI (MSI) IRQ cascade handlers in designware, qcom, and vmd as IRQF_NO_THREAD explicitly. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Keith Busch <keith.busch@intel.com> # vmd Acked-by: Jingoo Han <jingoohan1@gmail.com> # pcie-designware-plat.c
2017-07-02arm64: PCI: Drop DT IRQ allocation from pcibios_alloc_irq()Lorenzo Pieralisi
With the introduction of struct pci_host_bridge.map_irq pointer it is possible to assign IRQs for all devices originating from a PCI host bridge at probe time; this is implemented through pci_assign_irq() that relies on the struct pci_host_bridge.map_irq pointer to map IRQ for a given device. The benefits this brings are twofold: - the IRQ for a device is assigned once at probe time - the IRQ assignment works also for hotplugged devices With all DT based PCI host bridges converted to the struct pci_host_bridge.{map/swizzle}_irq hooks mechanism the DT IRQ allocation in ARM64 pcibios_alloc_irq() is now redundant and can be removed. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Will Deacon <will.deacon@arm.com>
2017-07-02PCI: xilinx-nwl: Move to struct pci_host_bridge IRQ mapping functionsLorenzo Pieralisi
struct pci_host_bridge gained hooks to map/swizzle IRQs, so that the IRQ mapping can be done automatically by PCI core code through the pci_assign_irq() function instead of resorting to arch-specific implementation callbacks to carry out the same task which force PCI host bridge drivers implementation to implement per-arch kludges to carry out a task that is inherently architecture agnostic. Add map/swizzle IRQs hooks to the xilinx-nwl PCI host driver to move the IRQ allocation into core code and stop relying on arch-specific callbacks. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
2017-07-02PCI: rockchip: Move to struct pci_host_bridge IRQ mapping functionsLorenzo Pieralisi
struct pci_host_bridge gained hooks to map/swizzle IRQs, so that the IRQ mapping can be done automatically by PCI core code through the pci_assign_irq() function instead of resorting to arch-specific implementation callbacks to carry out the same task which force PCI host bridge drivers implementation to implement per-arch kludges to carry out a task that is inherently architecture agnostic. Add map/swizzle IRQs hooks to the rockchip PCI host driver to move the IRQ allocation into core code and stop relying on arch-specific callbacks. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Wenrui Li <wenrui.li@rock-chips.com> Cc: Shawn Lin <shawn.lin@rock-chips.com>
2017-07-02PCI: xgene: Move to struct pci_host_bridge IRQ mapping functionsLorenzo Pieralisi
struct pci_host_bridge gained hooks to map/swizzle IRQs, so that the IRQ mapping can be done automatically by PCI core code through the pci_assign_irq() function instead of resorting to arch-specific implementation callbacks to carry out the same task which force PCI host bridge drivers implementation to implement per-arch kludges to carry out a task that is inherently architecture agnostic. Add map/swizzle IRQs hooks to the xgene PCI host driver to move the IRQ allocation into core code and stop relying on arch-specific callbacks. Tested-by: Khuong Dinh <kdinh@apm.com> # with e1000e Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Tanmay Inamdar <tinamdar@apm.com>
2017-07-02PCI: altera: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI altera host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Ley Foon Tan <lftan@altera.com>
2017-07-02PCI: versatile: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI versatile host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> [bhelgaas: folded in typo fix from Arnd Bergmann <arnd@arndb.de>: http://lkml.kernel.org/r/20170621215323.3921382-4-arnd@arndb.de] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Rob Herring <robh@kernel.org>
2017-07-02PCI: generic: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI host-common bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Will Deacon <will.deacon@arm.com>
2017-07-02PCI: faraday: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI ftpci100 host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Linus Walleij <linus.walleij@linaro.org>
2017-07-02PCI: designware: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI designware host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: Joao Pinto <Joao.Pinto@synopsys.com>
2017-07-02PCI: iproc: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI iproc host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: Ray Jui <rjui@broadcom.com> Cc: Jon Mason <jonmason@broadcom.com>
2017-07-02PCI: rcar: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI rcar host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Simon Horman <horms@verge.net.au>
2017-07-02PCI: xilinx: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation. Drop pci_fixup_irqs() usage from PCI xilinx host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Michal Simek <michal.simek@xilinx.com>
2017-07-02PCI: tegra: Drop pci_fixup_irqs()Lorenzo Pieralisi
Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now allocated in the pci_assign_irq() callback automatically, PCI host bridge drivers can stop relying on pci_fixup_irqs() for IRQ allocation Drop pci_fixup_irqs() usage from PCI tegra host bridge driver. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Thierry Reding <thierry.reding@gmail.com>
2017-07-02ARM/PCI: Remove pci_fixup_irqs() call for bios32 host controllersLorenzo Pieralisi
Legacy PCI host controllers (ie host controllers that set-up the PCI bus through the ARM pci_common_init() API) are currently relying on pci_fixup_irqs() to assign legacy PCI irqs to devices. This is not ideal in that pci_fixup_irqs() assigns IRQs for all PCI devices present in a given system some of which may well be enabled by the time pci_fixup_irqs() is called (ie a system with multiple host controllers). With the introduction of struct pci_host_bridge.(*map_irq) pointer it is possible to assign IRQs for all devices originating from a PCI host bridge at probe time; this is implemented through pci_assign_irq() that relies on the struct pci_host_bridge.map_irq pointer to map IRQ for a given device. The benefits this brings are twofold: - the IRQ for a device is assigned once at probe time - the IRQ assignment works also for hotplugged devices Remove pci_fixup_irqs() call from bios32 code and rely on pci_assign_irq() to carry out the IRQ mapping at device probe time. The map_irq() and swizzle_irq() struct pci_host_bridge callbacks are set-up in the struct pci_host_bridge created in the bios32 pcibios_init_hw() function and mach-* code paths (for PCI mach implementations that require a specific struct hw_pci.(*scan) function callback). Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> [bhelgaas: folded in fixes from Lorenzo: http://lkml.kernel.org/r/20170701140629.GC8977@red-moon] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Russell King <linux@armlinux.org.uk> Cc: Andrew Lunn <andrew@lunn.ch>
2017-07-02PCI: Add a call to pci_assign_irq() in pci_device_probe()Matthew Minter
The pci_assign_irq() function allows assignment of an IRQ to devices during device enable time rather than only at boot. Therefore call it in the pci_device_probe() function during the enable device code path so this assignment can be performed. This patch will do nothing on arches which do not set the IRQ mapping function pointers and is therefore currently a nop, however as support for these function pointers is added to arch-specific code this will cause IRQ assignment to migrate to device enable time allowing the new code paths to be used. Signed-off-by: Matthew Minter <matt@masarand.com> [lorenzo.pieralisi@arm.com: moved pci_assign_irq() call site] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02OF/PCI: Update of_irq_parse_and_map_pci() commentMatthew Minter
With the introduction of struct pci_host_bridge.(*map_irq) function pointer add another direct usage of of_irq_parse_and_map_pci(). Update the function comment to reflect this behaviour. Signed-off-by: Matthew Minter <matt@masarand.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02PCI: Add pci_assign_irq() function and have pci_fixup_irqs() use itMatthew Minter
Here we delete the static pdev_fixup_irq() function which is currently what pci_fixup_irqs() uses to actually assign the IRQs and replace it with the pci_assign_irq() function which changes the interface and uses the new function pointers stored in the host bridge structure. Eventually this will allow pci_fixup_irqs() to be removed entirely and the new deferred assignment code path will call pci_assign_irq() directly. However to ensure current users continue to work, a new implementation of pci_fixup_irqs() is introduced which simply wraps the functionality of pci_assign_irq(). Signed-off-by: Matthew Minter <matt@masarand.com> [lorenzo.pieralisi@arm.com: reworked comments/log] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02PCI: Add IRQ mapping function pointers to pci_host_bridge structMatthew Minter
In order to defer IRQ assignment arches must be able to register functions to map and swizzle interrupts. These registered functions are stored in the pci_host_bridge struct. Signed-off-by: Matthew Minter <matt@masarand.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02PCI: Build setup-irq.o on all archesMatthew Minter
The functions included in setup-irq.o currently apply only to a selection of architectures which share common IRQ assignment code. However this code needs to be generalised for all arches to allow deferred IRQ assignment. So the first step is to build it on all architectures. Signed-off-by: Matthew Minter <matt@masarand.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02PCI: Remove pci_scan_root_bus_msi()Lorenzo Pieralisi
The pci_scan_root_bus_bridge() function allows passing a parameterized struct pci_host_bridge and scanning the resulting PCI bus; since the struct msi_controller is part of the struct pci_host_bridge and the struct pci_host_bridge can now be passed to pci_scan_root_bus_bridge() explicitly, there is no need for a scan interface with a MSI controller parameter. With all PCI host controller drivers and platform code relying on pci_scan_root_bus_msi() converted over to pci_scan_root_bus_bridge() the pci_scan_root_bus_msi() becomes obsolete and can be removed. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-07-02PCI: xilinx-nwl: Convert PCI scan API to pci_scan_root_bus_bridge()Lorenzo Pieralisi
The introduction of pci_scan_root_bus_bridge() provides a PCI core API to scan a PCI root bus backed by an already initialized struct pci_host_bridge object, which simplifies the bus scan interface and makes the PCI scan root bus interface easier to generalize as members are added to the struct pci_host_bridge. Convert PCI xilinx-nwl host code to pci_scan_root_bus_bridge() to improve the PCI root bus scanning interface. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
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