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2020-10-22Merge tag 'pci-v5.10-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Enumeration: - Print IRQ number used by PCIe Link Bandwidth Notification (Dongdong Liu) - Add schedule point in pci_read_config() to reduce max latency (Jiang Biao) - Add Kconfig options for MPS/MRRS strategy (Jim Quinlan) Resource management: - Fix pci_iounmap() memory leak when !CONFIG_GENERIC_IOMAP (Lorenzo Pieralisi) PCIe native device hotplug: - Reduce noisiness on hot removal (Lukas Wunner) Power management: - Revert "PCI/PM: Apply D2 delay as milliseconds, not microseconds" that was done on the basis of spec typo (Bjorn Helgaas) - Rename pci_dev.d3_delay to d3hot_delay to remove D3hot/D3cold ambiguity (Krzysztof Wilczyński) - Remove unused pcibios_pm_ops (Vaibhav Gupta) IOMMU: - Enable Translation Blocking for external devices to harden against DMA attacks (Rajat Jain) Error handling: - Add an ACPI APEI notifier chain for vendor CPER records to enable device-specific error handling (Shiju Jose) ASPM: - Remove struct aspm_register_info to simplify code (Saheed O. Bolarinwa) Amlogic Meson PCIe controller driver: - Build as module by default (Kevin Hilman) Ampere Altra PCIe controller driver: - Add MCFG quirk to work around non-standard ECAM implementation (Tuan Phan) Broadcom iProc PCIe controller driver: - Set affinity mask on MSI interrupts (Mark Tomlinson) Broadcom STB PCIe controller driver: - Make PCIE_BRCMSTB depend on ARCH_BRCMSTB (Jim Quinlan) - Add DT bindings for more Brcmstb chips (Jim Quinlan) - Add bcm7278 register info (Jim Quinlan) - Add bcm7278 PERST# support (Jim Quinlan) - Add suspend and resume pm_ops (Jim Quinlan) - Add control of rescal reset (Jim Quinlan) - Set additional internal memory DMA viewport sizes (Jim Quinlan) - Accommodate MSI for older chips (Jim Quinlan) - Set bus max burst size by chip type (Jim Quinlan) - Add support for bcm7211, bcm7216, bcm7445, bcm7278 (Jim Quinlan) Freescale i.MX6 PCIe controller driver: - Use dev_err_probe() to reduce redundant messages (Anson Huang) Freescale Layerscape PCIe controller driver: - Enforce 4K DMA buffer alignment in endpoint test (Hou Zhiqiang) - Add DT compatible strings for ls1088a, ls2088a (Xiaowei Bao) - Add endpoint support for ls1088a, ls2088a (Xiaowei Bao) - Add endpoint test support for lS1088a (Xiaowei Bao) - Add MSI-X support for ls1088a (Xiaowei Bao) HiSilicon HIP PCIe controller driver: - Handle HIP-specific errors via ACPI APEI (Yicong Yang) HiSilicon Kirin PCIe controller driver: - Return -EPROBE_DEFER if the GPIO isn't ready (Bean Huo) Intel VMD host bridge driver: - Factor out physical offset, bus offset, IRQ domain, IRQ allocation (Jon Derrick) - Use generic PCI PM correctly (Jon Derrick) Marvell Aardvark PCIe controller driver: - Fix compilation on s390 (Pali Rohár) - Implement driver 'remove' function and allow to build it as module (Pali Rohár) - Move PCIe reset card code to advk_pcie_train_link() (Pali Rohár) - Convert mvebu a3700 internal SMCC firmware return codes to errno (Pali Rohár) - Fix initialization with old Marvell's Arm Trusted Firmware (Pali Rohár) Microsoft Hyper-V host bridge driver: - Fix hibernation in case interrupts are not re-created (Dexuan Cui) NVIDIA Tegra PCIe controller driver: - Stop checking return value of debugfs_create() functions (Greg Kroah-Hartman) - Convert to use DEFINE_SEQ_ATTRIBUTE macro (Liu Shixin) Qualcomm PCIe controller driver: - Reset PCIe to work around Qsdk U-Boot issue (Ansuel Smith) Renesas R-Car PCIe controller driver: - Add DT documentation for r8a774a1, r8a774b1, r8a774e1 endpoints (Lad Prabhakar) - Add RZ/G2M, RZ/G2N, RZ/G2H IDs to endpoint test (Lad Prabhakar) - Add DT support for r8a7742 (Lad Prabhakar) Socionext UniPhier Pro5 controller driver: - Add DT descriptions of iATU register (host and endpoint) (Kunihiko Hayashi) Synopsys DesignWare PCIe controller driver: - Add link up check in dw_child_pcie_ops.map_bus() (racy, but seems unavoidable) (Hou Zhiqiang) - Fix endpoint Header Type check so multi-function devices work (Hou Zhiqiang) - Skip PCIE_MSI_INTR0* programming if MSI is disabled (Jisheng Zhang) - Stop leaking MSI page in suspend/resume (Jisheng Zhang) - Add common iATU register support instead of keystone-specific code (Kunihiko Hayashi) - Major config space access and other cleanups in dwc core and drivers that use it (al, exynos, histb, imx6, intel-gw, keystone, kirin, meson, qcom, tegra) (Rob Herring) - Add multiple PFs support for endpoint (Xiaowei Bao) - Add MSI-X doorbell mode in endpoint mode (Xiaowei Bao) Miscellaneous: - Use fallthrough pseudo-keyword (Gustavo A. R. Silva) - Fix "0 used as NULL pointer" warnings (Gustavo Pimentel) - Fix "cast truncates bits from constant value" warnings (Gustavo Pimentel) - Remove redundant zeroing for sg_init_table() (Julia Lawall) - Use scnprintf(), not snprintf(), in sysfs "show" functions (Krzysztof Wilczyński) - Remove unused assignments (Krzysztof Wilczyński) - Fix "0 used as NULL pointer" warning (Krzysztof Wilczyński) - Simplify bool comparisons (Krzysztof Wilczyński) - Use for_each_child_of_node() and for_each_node_by_name() (Qinglang Miao) - Simplify return expressions (Qinglang Miao)" * tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (147 commits) PCI: vmd: Update VMD PM to correctly use generic PCI PM PCI: vmd: Create IRQ allocation helper PCI: vmd: Create IRQ Domain configuration helper PCI: vmd: Create bus offset configuration helper PCI: vmd: Create physical offset helper PCI: v3-semi: Remove unneeded break PCI: dwc: Add link up check in dw_child_pcie_ops.map_bus() PCI/ASPM: Remove struct pcie_link_state.l1ss PCI/ASPM: Remove struct aspm_register_info.l1ss_cap PCI/ASPM: Pass L1SS Capabilities value, not struct aspm_register_info PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl1 PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl2 (unused) PCI/ASPM: Remove struct aspm_register_info.l1ss_cap_ptr PCI/ASPM: Remove struct aspm_register_info.latency_encoding PCI/ASPM: Remove struct aspm_register_info.enabled PCI/ASPM: Remove struct aspm_register_info.support PCI/ASPM: Use 'parent' and 'child' for readability PCI/ASPM: Move LTR path check to where it's used PCI/ASPM: Move pci_clear_and_set_dword() earlier PCI: dwc: Fix MSI page leakage in suspend/resume ...
2020-09-30PCI: Add Kconfig options for MPS/MRRS strategyJim Quinlan
Add Kconfig options for changing the default pcie_bus_config, i.e., the strategy for configuration MPS and MRRS, in the same manner as the CONFIG_PCIEASPM_XXXX choice. The pci_bus_config setting may still be overridden by kernel command-line parameters, e.g., "pci=pcie_bus_tune_off". [bhelgaas: depend on EXPERT, tweak help texts] Link: https://lore.kernel.org/r/20200928194651.5393-2-james.quinlan@broadcom.com Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2020-09-16PCI/MSI: Make arch_.*_msi_irq[s] fallbacks selectableThomas Gleixner
The arch_.*_msi_irq[s] fallbacks are compiled in whether an architecture requires them or not. Architectures which are fully utilizing hierarchical irq domains should never call into that code. It's not only architectures which depend on that by implementing one or more of the weak functions, there is also a bunch of drivers which relies on the weak functions which invoke msi_controller::setup_irq[s] and msi_controller::teardown_irq. Make the architectures and drivers which rely on them select them in Kconfig and if not selected replace them by stub functions which emit a warning and fail the PCI/MSI interrupt allocation. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20200826112333.992429909@linutronix.de
2019-11-28Merge branch 'pci/trivial'Bjorn Helgaas
- Fix typos and comments (Bjorn Helgaas) - Fix Kconfig whitespace errors (Krzysztof Kozlowski) * pci/trivial: PCI: Fix indentation PCI: Fix typos PCI: Remove useless comments and tidy others PCI: Remove unnecessary includes # Conflicts: # drivers/pci/probe.c
2019-11-26PCI: Remove PCI_MSI_IRQ_DOMAIN architecture whitelistPalmer Dabbelt
The only apparent reason for the PCI_MSI_IRQ_DOMAIN architecture whitelist was that it requires msi.h. Now that msi.h is mandatory in asm-generic/Kbuild, every arch should have at least the default version, so remove the whitelist. Built for all the architectures that play nice with make.cross, but not boot tested anywhere. Link: https://lore.kernel.org/r/514e7b040be8ccd69088193aba260da1b89e919c.1571983829.git.michal.simek@xilinx.com Signed-off-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Waiman Long <longman@redhat.com>
2019-11-21PCI: Fix indentationKrzysztof Kozlowski
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig [bhelgaas: do same in vmd.c] Link: https://lore.kernel.org/r/20191120134036.14502-1-krzk@kernel.org Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2019-09-23Merge tag 'pci-v5.4-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Enumeration: - Consolidate _HPP/_HPX stuff in pci-acpi.c and simplify it (Krzysztof Wilczynski) - Fix incorrect PCIe device types and remove dev->has_secondary_link to simplify code that deals with upstream/downstream ports (Mika Westerberg) - After suspend, restore Resizable BAR size bits correctly for 1MB BARs (Sumit Saxena) - Enable PCI_MSI_IRQ_DOMAIN support for RISC-V (Wesley Terpstra) Virtualization: - Add ACS quirks for iProc PAXB (Abhinav Ratna), Amazon Annapurna Labs (Ali Saidi) - Move sysfs SR-IOV functions to iov.c (Kelsey Skunberg) - Remove group write permissions from sysfs sriov_numvfs, sriov_drivers_autoprobe (Kelsey Skunberg) Hotplug: - Simplify pciehp indicator control (Denis Efremov) Peer-to-peer DMA: - Allow P2P DMA between root ports for whitelisted bridges (Logan Gunthorpe) - Whitelist some Intel host bridges for P2P DMA (Logan Gunthorpe) - DMA map P2P DMA requests that traverse host bridge (Logan Gunthorpe) Amazon Annapurna Labs host bridge driver: - Add DT binding and controller driver (Jonathan Chocron) Hyper-V host bridge driver: - Fix hv_pci_dev->pci_slot use-after-free (Dexuan Cui) - Fix PCI domain number collisions (Haiyang Zhang) - Use instance ID bytes 4 & 5 as PCI domain numbers (Haiyang Zhang) - Fix build errors on non-SYSFS config (Randy Dunlap) i.MX6 host bridge driver: - Limit DBI register length (Stefan Agner) Intel VMD host bridge driver: - Fix config addressing issues (Jon Derrick) Layerscape host bridge driver: - Add bar_fixed_64bit property to endpoint driver (Xiaowei Bao) - Add CONFIG_PCI_LAYERSCAPE_EP to build EP/RC drivers separately (Xiaowei Bao) Mediatek host bridge driver: - Add MT7629 controller support (Jianjun Wang) Mobiveil host bridge driver: - Fix CPU base address setup (Hou Zhiqiang) - Make "num-lanes" property optional (Hou Zhiqiang) Tegra host bridge driver: - Fix OF node reference leak (Nishka Dasgupta) - Disable MSI for root ports to work around design problem (Vidya Sagar) - Add Tegra194 DT binding and controller support (Vidya Sagar) - Add support for sideband pins and slot regulators (Vidya Sagar) - Add PIPE2UPHY support (Vidya Sagar) Misc: - Remove unused pci_block_cfg_access() et al (Kelsey Skunberg) - Unexport pci_bus_get(), etc (Kelsey Skunberg) - Hide PM, VC, link speed, ATS, ECRC, PTM constants and interfaces in the PCI core (Kelsey Skunberg) - Clean up sysfs DEVICE_ATTR() usage (Kelsey Skunberg) - Mark expected switch fall-through (Gustavo A. R. Silva) - Propagate errors for optional regulators and PHYs (Thierry Reding) - Fix kernel command line resource_alignment parameter issues (Logan Gunthorpe)" * tag 'pci-v5.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (112 commits) PCI: Add pci_irq_vector() and other stubs when !CONFIG_PCI arm64: tegra: Add PCIe slot supply information in p2972-0000 platform arm64: tegra: Add configuration for PCIe C5 sideband signals PCI: tegra: Add support to enable slot regulators PCI: tegra: Add support to configure sideband pins PCI: vmd: Fix shadow offsets to reflect spec changes PCI: vmd: Fix config addressing when using bus offsets PCI: dwc: Add validation that PCIe core is set to correct mode PCI: dwc: al: Add Amazon Annapurna Labs PCIe controller driver dt-bindings: PCI: Add Amazon's Annapurna Labs PCIe host bridge binding PCI: Add quirk to disable MSI-X support for Amazon's Annapurna Labs Root Port PCI/VPD: Prevent VPD access for Amazon's Annapurna Labs Root Port PCI: Add ACS quirk for Amazon Annapurna Labs root ports PCI: Add Amazon's Annapurna Labs vendor ID MAINTAINERS: Add PCI native host/endpoint controllers designated reviewer PCI: hv: Use bytes 4 and 5 from instance ID as the PCI domain numbers dt-bindings: PCI: tegra: Add PCIe slot supplies regulator entries dt-bindings: PCI: tegra: Add sideband pins configuration entries PCI: tegra: Add Tegra194 PCIe support PCI: Get rid of dev->has_secondary_link flag ...
2019-09-23Merge branch 'pci/trivial'Bjorn Helgaas
- Fix typos and whitespace errors (Bjorn Helgaas, Krzysztof Wilczynski) - Remove unnecessary "return" statements (Krzysztof Wilczynski) - Correct of_irq_parse_pci() function documentation (Lubomir Rintel) * pci/trivial: PCI: Remove unnecessary returns PCI: OF: Correct of_irq_parse_pci() documentation PCI: Fix typos and whitespace errors
2019-09-23Merge branch 'remotes/lorenzo/pci/hv'Bjorn Helgaas
- Fix Hyper-V use-after-free in pci_dev removal (Dexuan Cui) - Fix Hyper-V build error in non-sysfs config (Randy Dunlap) - Reallocate to avoid Hyper-V domain number collisions (Haiyang Zhang) - Use Hyper-V instance ID bytes 4-5 to reduce domain collisions (Haiyang Zhang) * remotes/lorenzo/pci/hv: PCI: hv: Use bytes 4 and 5 from instance ID as the PCI domain numbers PCI: hv: Detect and fix Hyper-V PCI domain number collision PCI: pci-hyperv: Fix build errors on non-SYSFS config PCI: hv: Avoid use of hv_pci_dev->pci_slot after freeing it
2019-08-30PCI: Fix typos and whitespace errorsBjorn Helgaas
Fix typos in drivers/pci. Comment and whitespace changes only. Link: https://lore.kernel.org/r/20190819115306.27338-1-kw@linux.com Signed-off-by: Krzysztof Wilczynski <kw@linux.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> # armada8k
2019-08-22PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interfaceHaiyang Zhang
This interface driver is a helper driver allows other drivers to have a common interface with the Hyper-V PCI frontend driver. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-15PCI: pci-hyperv: Fix build errors on non-SYSFS configRandy Dunlap
Fix build errors when building almost-allmodconfig but with SYSFS not set (not enabled). Fixes these build errors: ERROR: "pci_destroy_slot" [drivers/pci/controller/pci-hyperv.ko] undefined! ERROR: "pci_create_slot" [drivers/pci/controller/pci-hyperv.ko] undefined! drivers/pci/slot.o is only built when SYSFS is enabled, so pci-hyperv.o has an implicit dependency on SYSFS. Make that explicit. Also, depending on X86 && X86_64 is not needed, so just change that to depend on X86_64. Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot information") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Jake Oshins <jakeo@microsoft.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Sasha Levin <sashal@kernel.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-pci@vger.kernel.org Cc: linux-hyperv@vger.kernel.org Cc: Dexuan Cui <decui@microsoft.com>
2019-08-08PCI/MSI: Enable PCI_MSI_IRQ_DOMAIN support for RISC-VWesley Terpstra
Add RISC-V as an arch that supports PCI_MSI_IRQ_DOMAIN. The related change to generate asm/msi.h is 251a44888183 ("riscv: include generic support for MSI irqdomains"). Link: https://lore.kernel.org/r/alpine.DEB.2.21.9999.1907251426450.32766@viisi.sifive.com Signed-off-by: Wesley Terpstra <wesley@sifive.com> [paul.walmsley@sifive.com: wrote patch description; split this patch from the arch/riscv patch] Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-01-14PCI: Fix PCI kconfig menu organizationRob Herring
After commit eb01d42a7778 ("PCI: consolidate PCI config entry in drivers/pci"), all the PCI kconfig options appear below "PCI support" rather than within a sub-menu. This is because menuconfig expects all kconfig entries to be enclosed in an if/endif section. Add the missing if/endif. With this, "depends on PCI" is redundant in the sub-menu entries and can be removed. Fixes: eb01d42a7778 ("PCI: consolidate PCI config entry in drivers/pci") Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-01-05Merge tag 'pci-v4.21-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: - Remove unused lists from ASPM pcie_link_state (Frederick Lawler) - Fix Broadcom CNB20LE host bridge unintended sign extension (Colin Ian King) - Expand Kconfig "PF" acronyms (Randy Dunlap) - Update MAINTAINERS for arch/x86/kernel/early-quirks.c (Bjorn Helgaas) - Add missing include to drivers/pci.h (Alexandru Gagniuc) - Override Synopsys USB 3.x HAPS device class so dwc3-haps can claim it instead of xhci (Thinh Nguyen) - Clean up P2PDMA documentation (Randy Dunlap) - Allow runtime PM even if driver doesn't supply callbacks (Jarkko Nikula) - Remove status check after submitting Switchtec MRPC Firmware Download commands to avoid Completion Timeouts (Kelvin Cao) - Set Switchtec coherent DMA mask to allow 64-bit DMA (Boris Glimcher) - Fix Switchtec SWITCHTEC_IOCTL_EVENT_IDX_ALL flag overwrite issue (Joey Zhang) - Enable write combining for Switchtec MRPC Input buffers (Kelvin Cao) - Add Switchtec MRPC DMA mode support (Wesley Sheng) - Skip VF scanning on powerpc, which does this in firmware (Sebastian Ott) - Add Amlogic Meson PCIe controller driver and DT bindings (Yue Wang) - Constify histb dw_pcie_host_ops structure (Julia Lawall) - Support multiple power domains for imx6 (Leonard Crestez) - Constify layerscape driver data (Stefan Agner) - Update imx6 Kconfig to allow imx6 PCIe in imx7 kernel (Trent Piepho) - Support armada8k GPIO reset (Baruch Siach) - Support suspend/resume support on imx6 (Leonard Crestez) - Don't hard-code DesignWare DBI/ATU offst (Stephen Warren) - Skip i.MX6 PHY setup on i.MX7D (Andrey Smirnov) - Remove Jianguo Sun from HiSilicon STB maintainers (Lorenzo Pieralisi) - Mask DesignWare interrupts instead of disabling them to avoid lost interrupts (Marc Zyngier) - Add locking when acking DesignWare interrupts (Marc Zyngier) - Ack DesignWare interrupts in the proper callbacks (Marc Zyngier) - Use devm resource parser in mediatek (Honghui Zhang) - Remove unused mediatek "num-lanes" DT property (Honghui Zhang) - Add UniPhier PCIe controller driver and DT bindings (Kunihiko Hayashi) - Enable MSI for imx6 downstream components (Richard Zhu) * tag 'pci-v4.21-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (40 commits) PCI: imx: Enable MSI from downstream components s390/pci: skip VF scanning PCI/IOV: Add flag so platforms can skip VF scanning PCI/IOV: Factor out sriov_add_vfs() PCI: uniphier: Add UniPhier PCIe host controller support dt-bindings: PCI: Add UniPhier PCIe host controller description PCI: amlogic: Add the Amlogic Meson PCIe controller driver dt-bindings: PCI: meson: add DT bindings for Amlogic Meson PCIe controller arm64: dts: mt7622: Remove un-used property for PCIe arm: dts: mt7623: Remove un-used property for PCIe dt-bindings: PCI: MediaTek: Remove un-used property PCI: mediatek: Remove un-used variant in struct mtk_pcie_port MAINTAINERS: Remove Jianguo Sun from HiSilicon STB DWC entry PCI: dwc: Don't hard-code DBI/ATU offset PCI: imx: Add imx6sx suspend/resume support PCI: armada8k: Add support for gpio controlled reset signal PCI: dwc: Adjust Kconfig to allow IMX6 PCIe host on IMX7 PCI: dwc: layerscape: Constify driver data PCI: imx: Add multi-pd support PCI: Override Synopsys USB 3.x HAPS device class ...
2018-11-23PCI: consolidate the PCI_SYSCALL symbolChristoph Hellwig
Let architectures select the syscall support instead of duplicating the kconfig entry. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-23PCI: consolidate the PCI_DOMAINS and PCI_DOMAINS_GENERIC config optionsChristoph Hellwig
Move the definitions to drivers/pci and let the architectures select them. Two small differences to before: PCI_DOMAINS_GENERIC now selects PCI_DOMAINS, cutting down the churn for modern architectures. As the only architectured arm did previously also offer PCI_DOMAINS as a user visible choice in addition to selecting it from the relevant configs, this is gone now. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Paul Burton <paul.burton@mips.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-23PCI: consolidate PCI config entry in drivers/pciChristoph Hellwig
There is no good reason to duplicate the PCI menu in every architecture. Instead provide a selectable HAVE_PCI symbol that indicates availability of PCI support, and a FORCE_PCI symbol to for PCI on and the handle the rest in drivers/pci. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Paul Burton <paul.burton@mips.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-05PCI: Expand the "PF" acronym in Kconfig help textRandy Dunlap
Tell users what a PCI PF is in the PCI_PF_STUB config help text. Fixes: a8ccf8a66663 ("PCI/IOV: Add pci-pf-stub driver for PFs that only enable VFs") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
2018-10-20Merge branch 'remotes/lorenzo/pci/controller-misc'Bjorn Helgaas
- Remove redundant controller tests for "device_type == pci" (Rob Herring) - Document R-Car E3 (R8A77990) bindings (Tho Vu) - Add device tree support for R-Car r8a7744 (Biju Das) - Drop unused mvebu PCIe capability code (Thomas Petazzoni) - Add shared PCI bridge emulation code (Thomas Petazzoni) - Convert mvebu to use shared PCI bridge emulation (Thomas Petazzoni) - Add aardvark Root Port emulation (Thomas Petazzoni) * remotes/lorenzo/pci/controller-misc: PCI: aardvark: Implement emulated root PCI bridge config space PCI: mvebu: Convert to PCI emulated bridge config space PCI: mvebu: Drop unused PCI express capability code PCI: Introduce PCI bridge emulated config space common logic dt-bindings: PCI: rcar: Add device tree support for r8a7744 dt-bindings: PCI: rcar: Add device tree support for r8a7744 DT: pci: rcar-pci: document R8A77990 bindings PCI: Remove unnecessary check of device_type == pci
2018-10-18PCI: Introduce PCI bridge emulated config space common logicThomas Petazzoni
Some PCI host controllers do not expose a configuration space for the root port PCI bridge. Due to this, the Marvell Armada 370/38x/XP PCI controller driver (pci-mvebu) emulates a root port PCI bridge configuration space, and uses that to (among other things) dynamically create the memory windows that correspond to the PCI MEM and I/O regions. Since we now need to add a very similar logic for the Marvell Armada 37xx PCI controller driver (pci-aardvark), instead of duplicating the code, we create in this commit a common logic called pci-bridge-emul. The idea of this logic is to emulate a root port PCI bridge configuration space by providing configuration space read/write operations, and faking behind the scenes the configuration space of a PCI bridge. A PCI host controller driver simply has to call pci_bridge_emul_conf_read() and pci_bridge_emul_conf_write() to read/write the configuration space of the bridge. By default, the PCI bridge configuration space is simply emulated by a chunk of memory, but the PCI host controller can override the behavior of the read and write operations on a per-register basis to do additional actions if needed. We take care of complying with the behavior of the PCI configuration space registers in terms of bits that are read-write, read-only, reserved and write-1-to-clear. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-10-10PCI/P2PDMA: Support peer-to-peer memoryLogan Gunthorpe
Some PCI devices may have memory mapped in a BAR space that's intended for use in peer-to-peer transactions. To enable such transactions the memory must be registered with ZONE_DEVICE pages so it can be used by DMA interfaces in existing drivers. Add an interface for other subsystems to find and allocate chunks of P2P memory as necessary to facilitate transfers between two PCI peers: struct pci_dev *pci_p2pmem_find[_many](); int pci_p2pdma_distance[_many](); void *pci_alloc_p2pmem(); The new interface requires a driver to collect a list of client devices involved in the transaction then call pci_p2pmem_find() to obtain any suitable P2P memory. Alternatively, if the caller knows a device which provides P2P memory, they can use pci_p2pdma_distance() to determine if it is usable. With a suitable p2pmem device, memory can then be allocated with pci_alloc_p2pmem() for use in DMA transactions. Depending on hardware, using peer-to-peer memory may reduce the bandwidth of the transfer but can significantly reduce pressure on system memory. This may be desirable in many cases: for example a system could be designed with a small CPU connected to a PCIe switch by a small number of lanes which would maximize the number of lanes available to connect to NVMe devices. The code is designed to only utilize the p2pmem device if all the devices involved in a transfer are behind the same PCI bridge. This is because we have no way of knowing whether peer-to-peer routing between PCIe Root Ports is supported (PCIe r4.0, sec 1.3.1). Additionally, the benefits of P2P transfers that go through the RC is limited to only reducing DRAM usage and, in some cases, coding convenience. The PCI-SIG may be exploring adding a new capability bit to advertise whether this is possible for future hardware. This commit includes significant rework and feedback from Christoph Hellwig. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> [bhelgaas: fold in fix from Keith Busch <keith.busch@intel.com>: https://lore.kernel.org/linux-pci/20181012155920.15418-1-keith.busch@intel.com, to address comment from Dan Carpenter <dan.carpenter@oracle.com>, fold in https://lore.kernel.org/linux-pci/20181017160510.17926-1-logang@deltatee.com] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-06-08PCI: Collect all native drivers under drivers/pci/controller/Shawn Lin
Native PCI drivers for root complex devices were originally all in drivers/pci/host/. Some of these devices can also be operated in endpoint mode. Drivers for endpoint mode didn't seem to fit in the "host" directory, so we put both the root complex and endpoint drivers in per-device directories, e.g., drivers/pci/dwc/, drivers/pci/cadence/, etc. These per-device directories contain trivial Kconfig and Makefiles and clutter drivers/pci/. Make a new drivers/pci/controllers/ directory and collect all the device-specific drivers there. No functional change intended. Link: https://lkml.kernel.org/r/1520304202-232891-1-git-send-email-shawn.lin@rock-chips.com Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-06-07Merge tag 'pci-v4.18-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: - unify AER decoding for native and ACPI CPER sources (Alexandru Gagniuc) - add TLP header info to AER tracepoint (Thomas Tai) - add generic pcie_wait_for_link() interface (Oza Pawandeep) - handle AER ERR_FATAL by removing and re-enumerating devices, as Downstream Port Containment does (Oza Pawandeep) - factor out common code between AER and DPC recovery (Oza Pawandeep) - stop triggering DPC for ERR_NONFATAL errors (Oza Pawandeep) - share ERR_FATAL recovery path between AER and DPC (Oza Pawandeep) - disable ASPM L1.2 substate if we don't have LTR (Bjorn Helgaas) - respect platform ownership of LTR (Bjorn Helgaas) - clear interrupt status in top half to avoid interrupt storm (Oza Pawandeep) - neaten pci=earlydump output (Andy Shevchenko) - avoid errors when extended config space inaccessible (Gilles Buloz) - prevent sysfs disable of device while driver attached (Christoph Hellwig) - use core interface to report PCIe link properties in bnx2x, bnxt_en, cxgb4, ixgbe (Bjorn Helgaas) - remove unused pcie_get_minimum_link() (Bjorn Helgaas) - fix use-before-set error in ibmphp (Dan Carpenter) - fix pciehp timeouts caused by Command Completed errata (Bjorn Helgaas) - fix refcounting in pnv_php hotplug (Julia Lawall) - clear pciehp Presence Detect and Data Link Layer Status Changed on resume so we don't miss hotplug events (Mika Westerberg) - only request pciehp control if we support it, so platform can use ACPI hotplug otherwise (Mika Westerberg) - convert SHPC to be builtin only (Mika Westerberg) - request SHPC control via _OSC if we support it (Mika Westerberg) - simplify SHPC handoff from firmware (Mika Westerberg) - fix an SHPC quirk that mistakenly included *all* AMD bridges as well as devices from any vendor with device ID 0x7458 (Bjorn Helgaas) - assign a bus number even to non-native hotplug bridges to leave space for acpiphp additions, to fix a common Thunderbolt xHCI hot-add failure (Mika Westerberg) - keep acpiphp from scanning native hotplug bridges, to fix common Thunderbolt hot-add failures (Mika Westerberg) - improve "partially hidden behind bridge" messages from core (Mika Westerberg) - add macros for PCIe Link Control 2 register (Frederick Lawler) - replace IB/hfi1 custom macros with PCI core versions (Frederick Lawler) - remove dead microblaze and xtensa code (Bjorn Helgaas) - use dev_printk() when possible in xtensa and mips (Bjorn Helgaas) - remove unused pcie_port_acpi_setup() and portdrv_acpi.c (Bjorn Helgaas) - add managed interface to get PCI host bridge resources from OF (Jan Kiszka) - add support for unbinding generic PCI host controller (Jan Kiszka) - fix memory leaks when unbinding generic PCI host controller (Jan Kiszka) - request legacy VGA framebuffer only for VGA devices to avoid false device conflicts (Bjorn Helgaas) - turn on PCI_COMMAND_IO & PCI_COMMAND_MEMORY in pci_enable_device() like everybody else, not in pcibios_fixup_bus() (Bjorn Helgaas) - add generic enable function for simple SR-IOV hardware (Alexander Duyck) - use generic SR-IOV enable for ena, nvme (Alexander Duyck) - add ACS quirk for Intel 7th & 8th Gen mobile (Alex Williamson) - add ACS quirk for Intel 300 series (Mika Westerberg) - enable register clock for Armada 7K/8K (Gregory CLEMENT) - reduce Keystone "link already up" log level (Fabio Estevam) - move private DT functions to drivers/pci/ (Rob Herring) - factor out dwc CONFIG_PCI Kconfig dependencies (Rob Herring) - add DesignWare support to the endpoint test driver (Gustavo Pimentel) - add DesignWare support for endpoint mode (Gustavo Pimentel) - use devm_ioremap_resource() instead of devm_ioremap() in dra7xx and artpec6 (Gustavo Pimentel) - fix Qualcomm bitwise NOT issue (Dan Carpenter) - add Qualcomm runtime PM support (Srinivas Kandagatla) - fix DesignWare enumeration below bridges (Koen Vandeputte) - use usleep() instead of mdelay() in endpoint test (Jia-Ju Bai) - add configfs entries for pci_epf_driver device IDs (Kishon Vijay Abraham I) - clean up pci_endpoint_test driver (Gustavo Pimentel) - update Layerscape maintainer email addresses (Minghuan Lian) - add COMPILE_TEST to improve build test coverage (Rob Herring) - fix Hyper-V bus registration failure caused by domain/serial number confusion (Sridhar Pitchai) - improve Hyper-V refcounting and coding style (Stephen Hemminger) - avoid potential Hyper-V hang waiting for a response that will never come (Dexuan Cui) - implement Mediatek chained IRQ handling (Honghui Zhang) - fix vendor ID & class type for Mediatek MT7622 (Honghui Zhang) - add Mobiveil PCIe host controller driver (Subrahmanya Lingappa) - add Mobiveil MSI support (Subrahmanya Lingappa) - clean up clocks, MSI, IRQ mappings in R-Car probe failure paths (Marek Vasut) - poll more frequently (5us vs 5ms) while waiting for R-Car data link active (Marek Vasut) - use generic OF parsing interface in R-Car (Vladimir Zapolskiy) - add R-Car V3H (R8A77980) "compatible" string (Sergei Shtylyov) - add R-Car gen3 PHY support (Sergei Shtylyov) - improve R-Car PHYRDY polling (Sergei Shtylyov) - clean up R-Car macros (Marek Vasut) - use runtime PM for R-Car controller clock (Dien Pham) - update arm64 defconfig for Rockchip (Shawn Lin) - refactor Rockchip code to facilitate both root port and endpoint mode (Shawn Lin) - add Rockchip endpoint mode driver (Shawn Lin) - support VMD "membar shadow" feature (Jon Derrick) - support VMD bus number offsets (Jon Derrick) - add VMD "no AER source ID" quirk for more device IDs (Jon Derrick) - remove unnecessary host controller CONFIG_PCIEPORTBUS Kconfig selections (Bjorn Helgaas) - clean up quirks.c organization and whitespace (Bjorn Helgaas) * tag 'pci-v4.18-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (144 commits) PCI/AER: Replace struct pcie_device with pci_dev PCI/AER: Remove unused parameters PCI: qcom: Include gpio/consumer.h PCI: Improve "partially hidden behind bridge" log message PCI: Improve pci_scan_bridge() and pci_scan_bridge_extend() doc PCI: Move resource distribution for single bridge outside loop PCI: Account for all bridges on bus when distributing bus numbers ACPI / hotplug / PCI: Drop unnecessary parentheses ACPI / hotplug / PCI: Mark stale PCI devices disconnected ACPI / hotplug / PCI: Don't scan bridges managed by native hotplug PCI: hotplug: Add hotplug_is_native() PCI: shpchp: Add shpchp_is_native() PCI: shpchp: Fix AMD POGO identification PCI: mobiveil: Add MSI support PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver PCI/AER: Decode Error Source Requester ID PCI/AER: Remove aer_recover_work_func() forward declaration PCI/DPC: Use the generic pcie_do_fatal_recovery() path PCI/AER: Pass service type to pcie_do_fatal_recovery() PCI/DPC: Disable ERR_NONFATAL handling by DPC ...
2018-05-09PCI: remove CONFIG_PCI_BUS_ADDR_T_64BITChristoph Hellwig
This symbol is now always identical to CONFIG_ARCH_DMA_ADDR_T_64BIT, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
2018-04-24PCI/IOV: Add pci-pf-stub driver for PFs that only enable VFsAlexander Duyck
Some SR-IOV PF devices provide no functionality other than acting as a means of enabling VFs. For these devices, we want to enable the VFs and assign them to guest virtual machines, but there's no need to have a driver for the PF itself. Add a new pci-pf-stub driver to claim those PF devices and provide the generic VF enable functionality. An administrator can use the sysfs "sriov_numvfs" file to enable VFs, then assign them to guests. For now I only have one example ID provided by Amazon in terms of devices that require this functionality. The general idea is that in the future we will see other devices added as vendors come up with devices where the PF is more or less just a lightweight shim used to allocate VFs. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Greg Rose <gvrose8192@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2018-02-01Merge branch 'pci/spdx' into nextBjorn Helgaas
* pci/spdx: PCI: Add SPDX GPL-2.0+ to replace implicit GPL v2 or later statement PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate PCI: Add SPDX GPL-2.0 to replace COPYING boilerplate PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate PCI: Add SPDX GPL-2.0 when no license was specified
2018-01-31PCI: cadence: Add EndPoint Controller driver for Cadence PCIe controllerCyrille Pitchen
This patch adds support to the Cadence PCIe controller in endpoint mode. Since pieces of source code are shared with the host driver (Root Complex mode), we create a new directory under drivers/pci dedicated to the Cadence PCIe controller. The common code is placed into drivers/pci/cadence/pcie-cadence.c and used by both the host and endpoint controller drivers. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-31PCI: Regroup all PCI related entries into drivers/pci/MakefileCyrille Pitchen
Clean up drivers/Makefile by moving the pci/endpoint and pci/dwc entries from drivers/Makefile into drivers/pci/Makefile. Since we don't want to introduce any dependency between CONFIG_PCI and CONFIG_PCI_ENDPOINT, we now always execute drivers/pci/Makefile. Hence all Makefiles in drivers/pci/ were updated accordingly so no file is compiled when CONFIG_PCI is not defined. Also, we add a comment to reinforce that EPC and EPF libraries must be initialized before their users. Hence built-in EPC drivers, such as those of Designware, are linked after the endpoint core libraries. Finally, we add another comment to explain why obj-y has been chosen instead of obj-$(CONFIG_PCIE_DW) to parse the dwc/ sub-folder. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-26PCI: Add SPDX GPL-2.0 when no license was specifiedBjorn Helgaas
b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license") added SPDX GPL-2.0 to several PCI files that previously contained no license information. Add SPDX GPL-2.0 to all other PCI files that did not contain any license information and hence were under the default GPL version 2 license of the kernel. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-26Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull misc x86 fixes from Ingo Molnar: - topology enumeration fixes - KASAN fix - two entry fixes (not yet the big series related to KASLR) - remove obsolete code - instruction decoder fix - better /dev/mem sanity checks, hopefully working better this time - pkeys fixes - two ACPI fixes - 5-level paging related fixes - UMIP fixes that should make application visible faults more debuggable - boot fix for weird virtualization environment * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) x86/decoder: Add new TEST instruction pattern x86/PCI: Remove unused HyperTransport interrupt support x86/umip: Fix insn_get_code_seg_params()'s return value x86/boot/KASLR: Remove unused variable x86/entry/64: Add missing irqflags tracing to native_load_gs_index() x86/mm/kasan: Don't use vmemmap_populate() to initialize shadow x86/entry/64: Fix entry_SYSCALL_64_after_hwframe() IRQ tracing x86/pkeys/selftests: Fix protection keys write() warning x86/pkeys/selftests: Rename 'si_pkey' to 'siginfo_pkey' x86/mpx/selftests: Fix up weird arrays x86/pkeys: Update documentation about availability x86/umip: Print a warning into the syslog if UMIP-protected instructions are used x86/smpboot: Fix __max_logical_packages estimate x86/topology: Avoid wasting 128k for package id array perf/x86/intel/uncore: Cache logical pkg id in uncore driver x86/acpi: Reduce code duplication in mp_override_legacy_irq() x86/acpi: Handle SCI interrupts above legacy space gracefully x86/boot: Fix boot failure when SMP MP-table is based at 0 x86/mm: Limit mmap() of /dev/mem to valid physical addresses x86/selftests: Add test for mapping placement for 5-level paging ...
2017-11-23x86/PCI: Remove unused HyperTransport interrupt supportBjorn Helgaas
There are no in-tree callers of ht_create_irq(), the driver interface for HyperTransport interrupts, left. Remove the unused entry point and all the supporting code. See 8b955b0dddb3 ("[PATCH] Initial generic hypertransport interrupt support"). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-pci@vger.kernel.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Link: https://lkml.kernel.org/r/20171122221337.3877.23362.stgit@bhelgaas-glaptop.roam.corp.google.com
2017-11-14Merge branch 'pci/virtualization' into nextBjorn Helgaas
* pci/virtualization: PCI: Document reset method return values PCI: Detach driver before procfs & sysfs teardown on device remove PCI: Apply Cavium ThunderX ACS quirk to more Root Ports PCI: Set Cavium ACS capability quirk flags to assert RR/CR/SV/UF PCI: Restore ARI Capable Hierarchy before setting numVFs PCI: Create SR-IOV virtfn/physfn links before attaching driver PCI: Expose SR-IOV offset, stride, and VF device ID via sysfs PCI: Cache the VF device ID in the SR-IOV structure PCI: Add Kconfig PCI_IOV dependency for PCI_REALLOC_ENABLE_AUTO PCI: Remove unused function __pci_reset_function() PCI: Remove reset argument from pci_iov_{add,remove}_virtfn()
2017-11-07PCI: Move PCI_QUIRKS to the PCI bus menuRandy Dunlap
Localize PCI_QUIRKS in the PCI bus menu. Move PCI_QUIRKS to the PCI bus menu instead of the (often broken) General Setup EXPERT menu. The prompt still depends on EXPERT. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-10-05PCI: Add Kconfig PCI_IOV dependency for PCI_REALLOC_ENABLE_AUTOSascha El-Sharkawy
Ensure only valid Kconfig configurations for PCI_REALLOC_ENABLE_AUTO. This is done by selecting PCI_IOV, which is required by PCI_REALLOC_ENABLE_AUTO to work. Signed-off-by: Sascha El-Sharkawy <elscha@sse.uni-hildesheim.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-06-28PCI: Provide Kconfig option for lockless config space accessorsThomas Gleixner
The generic PCI configuration space accessors are globally serialized via pci_lock. On larger systems this causes massive lock contention when the configuration space has to be accessed frequently. One such access pattern is the Intel Uncore performance counter unit. Provide a kernel config option which can be selected by an architecture when the low level PCI configuration space accessors in the architecture use their own serialization or can operate completely lockless. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Bjorn Helgaas <helgaas@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: linux-pci@vger.kernel.org Link: http://lkml.kernel.org/r/20170316215057.205961140@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-04-28Merge branch 'pci/switchtec' into nextBjorn Helgaas
* pci/switchtec: switchtec: Add IOCTLs to the Switchtec driver switchtec: Add sysfs attributes to the Switchtec driver switchtec: Add user interface documentation MicroSemi Switchtec management interface driver Conflicts: drivers/pci/Kconfig
2017-04-11PCI: endpoint: Add EP core layer to enable EP controller and EP functionsKishon Vijay Abraham I
Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-03-06MicroSemi Switchtec management interface driverLogan Gunthorpe
Microsemi's "Switchtec" line of PCI switch devices is already well supported by the kernel with standard PCI switch drivers. However, the Switchtec device advertises a special management endpoint with a separate PCI function address and class code. This endpoint enables some additional functionality which includes: * Packet and Byte Counters * Switch Firmware Upgrades * Event and Error logs * Querying port link status * Custom user firmware commands Add a switchtec kernel module which provides PCI driver that exposes a char device. The char device provides userspace access to this interface through read, write and (optionally) poll calls. A userspace tool and library which utilizes this interface is available at [1]. This tool takes inspiration (and borrows some code) from nvme-cli [2]. The tool is largely complete at this time but additional features may be added in the future. [1] https://github.com/sbates130272/switchtec-user [2] https://github.com/linux-nvme/nvme-cli [Dan Carpenter <dan.carpenter@oracle.com>: don't invert error codes] [Christophe JAILLET <christophe.jaillet@wanadoo.fr>: fix switchtec_dev_open() error handling] Tested-by: Krishna Dhulipala <krishnad@fb.com> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Stephen Bates <stephen.bates@microsemi.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Wei Zhang <wzhang@fb.com> Reviewed-by: Jens Axboe <axboe@fb.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-21PCI: Move DesignWare IP support to new drivers/pci/dwc/ directoryKishon Vijay Abraham I
Group all the PCI drivers that use DesignWare core in dwc directory. dwc IP is capable of operating in both host mode and device mode and keeping it inside the *host* directory is misleading. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Jingoo Han <jingoohan1@gmail.com> Acked-By: Joao Pinto <jpinto@synopsys.com> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Minghuan Lian <minghuan.Lian@freescale.com> Cc: Mingkai Hu <mingkai.hu@freescale.com> Cc: Roy Zang <tie-fei.zang@freescale.com> Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Murali Karicheri <m-karicheri2@ti.com> Cc: Pratyush Anand <pratyush.anand@gmail.com> Cc: Niklas Cassel <niklas.cassel@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Zhou Wang <wangzhou1@hisilicon.com> Cc: Gabriele Paoloni <gabriele.paoloni@huawei.com> Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
2016-09-06PCI/MSI: Enable PCI_MSI_IRQ_DOMAIN support for ARCJoao Pinto
Add ARC as an arch that supports PCI_MSI_IRQ_DOMAIN and add generation of msi.h in the ARC arch. Signed-off-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2016-06-15PCI/MSI: irqchip: Fix PCI_MSI dependenciesArnd Bergmann
The PCI_MSI symbol is used inconsistently throughout the tree, with some drivers using 'select' and others using 'depends on', or using conditional selects. This keeps causing problems; the latest one is a result of ARCH_ALPINE using a 'select' statement to enable its platform-specific MSI driver without enabling MSI: warning: (ARCH_ALPINE) selects ALPINE_MSI which has unmet direct dependencies (PCI && PCI_MSI) drivers/irqchip/irq-alpine-msi.c:104:15: error: variable 'alpine_msix_domain_info' has initializer but incomplete type static struct msi_domain_info alpine_msix_domain_info = { ^~~~~~~~~~~~~~~ drivers/irqchip/irq-alpine-msi.c:105:2: error: unknown field 'flags' specified in initializer .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | ^ drivers/irqchip/irq-alpine-msi.c:105:11: error: 'MSI_FLAG_USE_DEF_DOM_OPS' undeclared here (not in a function) .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | ^~~~~~~~~~~~~~~~~~~~~~~~ There is little reason to enable PCI support for a platform that uses MSI but then leave MSI disabled at compile time. Select PCI_MSI from irqchips that implement MSI, and make PCI host bridges that use MSI on ARM depend on PCI_MSI_IRQ_DOMAIN. For all three architectures that support PCI_MSI_IRQ_DOMAIN (ARM, ARM64, X86), enable it by default whenever MSI is enabled. [bhelgaas: changelog, omit crypto config change] Suggested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
2016-05-11PCI: Provide common functions for ECAM mappingJayachandran C
Add config option PCI_ECAM and file drivers/pci/ecam.c to provide generic functions for accessing memory-mapped PCI config space. The API is defined in drivers/pci/ecam.h and is written to replace the API in drivers/pci/host/pci-host-common.h. The file defines a new 'struct pci_config_window' to hold the information related to a PCI config area and its mapping. This structure is expected to be used as sysdata for controllers that have ECAM based mapping. Helper functions are provided to setup the mapping, free the mapping and to implement the map_bus method in 'struct pci_ops' Signed-off-by: Jayachandran C <jchandra@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-03-21PCI: Restore inclusion of pci/hotplug KconfigTero Roponen
Commit e7e127e3c767 ("PCI: Include pci/hotplug Kconfig directly from pci/Kconfig") added one line to pci/Kconfig. However, for some mysterious reason it isn't there now, even though there are no traces of removing it in the git log. I detected this issue when 'make oldconfig' removed all the options that depended on HOTPLUG_PCI. [bhelgaas: I botched the cfeb8139a1fb ("Merge branch 'pci/host-hv' into next") merge. "git diff cfeb8139a1fb^ cfeb8139a1fb" shows a conflict in drivers/pci/Kconfig, and I mistakenly dropped the hotplug/Kconfig piece.] Signed-off-by: Tero Roponen <tero.roponen@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-03-15Merge branch 'pci/host-hv' into nextBjorn Helgaas
* pci/host-hv: PCI: hv: Add paravirtual PCI front-end for Microsoft Hyper-V VMs PCI: Look up IRQ domain by fwnode_handle PCI: Add fwnode_handle to x86 pci_sysdata
2016-03-08PCI: Include pci/hotplug Kconfig directly from pci/KconfigBjorn Helgaas
Include pci/hotplug/Kconfig directly from pci/Kconfig, so arches don't have to source both pci/Kconfig and pci/hotplug/Kconfig. Note that this effectively adds pci/hotplug/Kconfig to the following arches, because they already sourced drivers/pci/Kconfig but they previously did not source drivers/pci/hotplug/Kconfig: alpha arm avr32 frv m68k microblaze mn10300 sparc unicore32 Inspired-by-patch-from: Bogicevic Sasa <brutallesale@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-03-08PCI: Include pci/pcie/Kconfig directly from pci/KconfigBogicevic Sasa
Include pci/pcie/Kconfig directly from pci/Kconfig, so arches don't have to source both pci/Kconfig and pci/pcie/Kconfig. Note that this effectively adds pci/pcie/Kconfig to the following arches, because they already sourced drivers/pci/Kconfig but they previously did not source drivers/pci/pcie/Kconfig: alpha avr32 blackfin frv m32r m68k microblaze mn10300 parisc sparc unicore32 xtensa [bhelgaas: changelog, source pci/pcie/Kconfig at top of pci/Kconfig, whitespace] Signed-off-by: Sasa Bogicevic <brutallesale@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-02-16PCI: hv: Add paravirtual PCI front-end for Microsoft Hyper-V VMsJake Oshins
Add a new driver which exposes a root PCI bus whenever a PCI Express device is passed through to a guest VM under Hyper-V. The device can be single- or multi-function. The interrupts for the devices are managed by an IRQ domain, implemented within the driver. [bhelgaas: fold in race condition fix (http://lkml.kernel.org/r/1456340196-13717-1-git-send-email-jakeo@microsoft.com)] Signed-off-by: Jake Oshins <jakeo@microsoft.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-09-08PCI,parisc: Enable 64-bit bus addresses on PA-RISCHelge Deller
Commit 3a9ad0b ("PCI: Add pci_bus_addr_t") unconditionally introduced usage of 64-bit PCI bus addresses on all 64-bit platforms which broke PA-RISC. It turned out that due to enabling the 64-bit addresses, the PCI logic decided to use the GMMIO instead of the LMMIO region. This commit simply disables registering the GMMIO and thus we fall back to use the LMMIO region as before. Reverts commit 45ea2a5fed6dacb9bb0558d8b21eacc1c45d5bb4 ("PCI: Don't use 64-bit bus addresses on PA-RISC") To: linux-parisc@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Meelis Roos <mroos@linux.ee> Cc: stable@vger.kernel.org # v3.19+ Signed-off-by: Helge Deller <deller@gmx.de>
2015-08-20PCI: Don't use 64-bit bus addresses on PA-RISCBjorn Helgaas
Meelis and Helge reported that 3a9ad0b4fdcd ("PCI: Add pci_bus_addr_t") caused HPMCs on A500 and hangs on rp5470. PA-RISC does not set ARCH_DMA_ADDR_T_64BIT, even for 64-bit kernels, so prior to 3a9ad0b4fdcd, we always used 32-bit PCI addresses. After 3a9ad0b4fdcd, we do use 64-bit PCI addresses in 64-bit kernels, and apparently there's some PA-RISC problem related to them. Fixes: 3a9ad0b4fdcd ("PCI: Add pci_bus_addr_t") Link: http://lkml.kernel.org/r/alpine.LRH.2.11.1507260929000.30065@math.ut.ee Reported-by: Meelis Roos <mroos@linux.ee> Reported-by: Helge Deller <deller@gmx.de> Tested-by: Helge Deller <deller@gmx.de> Based-on-idea-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Yinghai Lu <yinghai@kernel.org> CC: stable@vger.kernel.org # v3.19+
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