kernel.git/drivers/pci/Kconfig, branch linux-4.13.y

PCI: Provide Kconfig option for lockless config space accessors

2017-06-28T20:32:56Z

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 Acked-by: Bjorn Helgaas Cc: Andi Kleen Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Borislav Petkov Cc: linux-pci@vger.kernel.org Link: http://lkml.kernel.org/r/20170316215057.205961140@linutronix.de Signed-off-by: Thomas Gleixner

Merge branch 'pci/switchtec' into next

2017-04-28T15:33:41Z

* 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

PCI: endpoint: Add EP core layer to enable EP controller and EP functions

2017-04-11T19:18:35Z

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 Acked-by: Joao Pinto Signed-off-by: Bjorn Helgaas

MicroSemi Switchtec management interface driver

2017-03-07T00:33:34Z

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 : don't invert error codes] [Christophe JAILLET : fix switchtec_dev_open() error handling] Tested-by: Krishna Dhulipala Signed-off-by: Logan Gunthorpe Signed-off-by: Stephen Bates Signed-off-by: Bjorn Helgaas Reviewed-by: Wei Zhang Reviewed-by: Jens Axboe Reviewed-by: Greg Kroah-Hartman

PCI: Move DesignWare IP support to new drivers/pci/dwc/ directory

2017-02-21T20:59:53Z

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 Signed-off-by: Bjorn Helgaas Acked-by: Jingoo Han Acked-By: Joao Pinto Cc: Thomas Petazzoni Cc: Minghuan Lian Cc: Mingkai Hu Cc: Roy Zang Cc: Richard Zhu Cc: Lucas Stach Cc: Murali Karicheri Cc: Pratyush Anand Cc: Niklas Cassel Cc: Jesper Nilsson Cc: Zhou Wang Cc: Gabriele Paoloni Cc: Stanimir Varbanov

PCI/MSI: Enable PCI_MSI_IRQ_DOMAIN support for ARC

2016-09-06T15:53:32Z

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 Signed-off-by: Bjorn Helgaas Acked-by: Vineet Gupta

PCI/MSI: irqchip: Fix PCI_MSI dependencies

2016-06-15T20:47:33Z

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 Signed-off-by: Arnd Bergmann Signed-off-by: Bjorn Helgaas Acked-by: Marc Zyngier

PCI: Provide common functions for ECAM mapping

2016-05-11T22:34:41Z

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 Signed-off-by: Bjorn Helgaas

PCI: Restore inclusion of pci/hotplug Kconfig

2016-03-21T12:33:34Z

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 Signed-off-by: Bjorn Helgaas

Merge branch 'pci/host-hv' into next

2016-03-15T13:56:16Z

* 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