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2024-07-19Merge branch 'pci/misc'Bjorn Helgaas1-1/+1
- Remove unused struct 'acpi_handle_node' (Dr. David Alan Gilbert) - Use array notation for portdrv .id_table consistently (Masahiro Yamada) - Switch to new Intel CPU model defines (Tony Luck) - Add missing MODULE_DESCRIPTION() macros (Jeff Johnson) * pci/misc: PCI: controller: Add missing MODULE_DESCRIPTION() macros PCI: Add missing MODULE_DESCRIPTION() macros PCI/PM: Switch to new Intel CPU model defines PCI: Use array for .id_table consistently ACPI: PCI: Remove unused struct 'acpi_handle_node'
2024-07-10Documentation: PCI: pci-endpoint: Fix EPF ops listAlexander Stein1-2/+2
With commit 5779dd0a7dbd7 ("PCI: endpoint: Use notification chain mechanism to notify EPC events to EPF") the linkup callback has been removed and replaced by EPC event notifications. With commit 256ae475201b1 ("PCI: endpoint: Add pci_epf_ops to expose function-specific attrs") a new (optional) add_cfs callback was added. Update documentation accordingly. Link: https://lore.kernel.org/linux-pci/20240418084924.1724703-1-alexander.stein@ew.tq-group.com Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Niklas Cassel <cassel@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2024-06-07PCI: Use array for .id_table consistentlyMasahiro Yamada1-1/+1
While 'x' and '&x[0]' are equivalent, most of the PCI drivers use the former form for the .id_table. Update some drivers and documentation for consistency. Link: https://lore.kernel.org/r/20240517120458.1260489-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2024-05-17Merge branch 'pci/enumeration'Bjorn Helgaas2-2/+2
- Clear bridge Secondary Status errors after enumeration since enumeration causes many errors (Vidya Sagar) - Wait for Link Training==0 before starting Link retrain to avoid a race; this was done previously but broken by a faulty merge (Ilpo Järvinen) - Rename PCI_IRQ_LEGACY to PCI_IRQ_INTX to be more specific about what "LEGACY" means (Damien Le Moal) - Update return types of pci_find_capability() stubs to match the extern declarations for the actual implementations (Bjorn Helgaas) - Drop unnecessary pci_enable_device_io() from pata_cs5520 (Heiner Kallweit) - Drop unused pci_enable_device_io() (Heiner Kallweit) - On 2016 and newer BIOSes, skip early E820 check for ECAM regions described in ACPI MCFG; there's no spec requirement for E820 reservations, and some machines don't provide them (Bjorn Helgaas) - If devices were disconnected while suspended, don't wait for them when resuming (Ilpo Järvinen) * pci/enumeration: PCI: Do not wait for disconnected devices when resuming x86/pci: Skip early E820 check for ECAM region PCI: Remove unused pci_enable_device_io() ata: pata_cs5520: Remove unnecessary call to pci_enable_device_io() PCI: Update pci_find_capability() stub return types PCI: Remove PCI_IRQ_LEGACY scsi: vmw_pvscsi: Do not use PCI_IRQ_LEGACY instead of PCI_IRQ_LEGACY scsi: pmcraid: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY scsi: mpt3sas: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY scsi: megaraid_sas: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY scsi: ipr: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY scsi: hpsa: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY scsi: arcmsr: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY wifi: rtw89: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY wifi: rtw88: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY wifi: ath10k: Refer to INTX instead of LEGACY net: wangxun: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY r8169: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY net: alx: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY net: atlantic: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY net: amd-xgbe: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY VMCI: Use PCI_IRQ_ALL_TYPES to remove PCI_IRQ_LEGACY use RDMA/vmw_pvrdma: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY IB/qib: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY drm/amdgpu: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY mfd: intel-lpss: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY ntb: idt: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY platform/x86: intel_ips: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY tty: 8250_pci: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY usb: hcd-pci: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY ASoC: Intel: avs: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY Documentation: PCI: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY PCI/portdrv: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY PCI/MSI: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACY PCI: Clarify intent of LT wait PCI: Wait for Link Training==0 before starting Link retrain PCI: Clear Secondary Status errors after enumeration
2024-04-25Documentation: PCI: Use PCI_IRQ_INTX instead of PCI_IRQ_LEGACYDamien Le Moal2-2/+2
Change all references to PCI_IRQ_LEGACY to PCI_IRQ_INTX in the PCI documentation to reflect that PCI_IRQ_LEGACY is deprecated. Link: https://lore.kernel.org/r/20240325070944.3600338-4-dlemoal@kernel.org Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2024-04-17PCI/AER: Update aer-inject tool source URLKuppuswamy Sathyanarayanan1-1/+1
The aer-inject tool is no longer maintained in the original repository and is missing a fix related to the musl library. So, with the author's (Huang Ying) consent, it has been moved to a new repository [1]. Update all references to the repository link. Link: https://github.com/intel/aer-inject.git [1] Link: https://lore.kernel.org/r/20240416055035.200085-1-sathyanarayanan.kuppuswamy@linux.intel.com Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Huang Ying <ying.huang@intel.com>
2023-12-29docs: PCI: Fix typosattreyee-muk2-2/+2
Fix typos in PCI docs. Link: https://lore.kernel.org/r/20231223184720.25645-1-tintinm2017@gmail.com Link: https://lore.kernel.org/r/20231223184412.25598-1-tintinm2017@gmail.com Signed-off-by: Attreyee Mukherjee <tintinm2017@gmail.com> [bhelgaas: squashed, commit log] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> # for "busses" only
2023-10-10docs: move powerpc under archCosta Shulyupin1-2/+2
and fix all in-tree references. Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Signed-off-by: Costa Shulyupin <costa.shul@redhat.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20230826165737.2101199-1-costa.shul@redhat.com
2023-08-29Merge branch 'pci/misc'Bjorn Helgaas1-6/+6
- Reorder struct pci_dev to avoid holes and reduce size (Christophe JAILLET) - Change pdev->rom_attr_enabled to single bit since it's only a boolean value (Christophe JAILLET) - Use struct_size() in pirq_convert_irt_table() instead of hand-writing it (Christophe JAILLET) - Explicitly include correct DT includes to untangle headers (Rob Herring) - Fix a DOE race between destroy_work_on_stack() and the stack-allocated task->work struct going out of scope in pci_doe() (Ira Weiny) - Use pci_dev_id() when possible instead of manually composing ID from dev->bus->number and dev->devfn (Xiongfeng Wang, Zheng Zengkai) - Move pci_create_resource_files() declarations to linux/pci.h for alpha build warnings (Arnd Bergmann) - Remove unused hotplug function declarations (Yue Haibing) - Remove unused mvebu struct mvebu_pcie.busn (Pali Rohár) - Unexport pcie_port_bus_type (Bjorn Helgaas) - Remove unnecessary sysfs ID local variable initialization (Bjorn Helgaas) - Fix BAR value printk formatting to accommodate 32-bit values (Bjorn Helgaas) - Use consistent pointer types for config access syscall get_user() and put_user() uses (Bjorn Helgaas) - Simplify AER_RECOVER_RING_SIZE definition (Bjorn Helgaas) - Simplify pci_pio_to_address() (Bjorn Helgaas) - Simplify pci_dev_driver() (Bjorn Helgaas) - Fix pci_bus_resetable(), pci_slot_resetable() name typos (Bjorn Helgaas) - Fix code and doc typos and code formatting (Bjorn Helgaas) - Tidy config space save/restore messages (Bjorn Helgaas) * pci/misc: PCI: Tidy config space save/restore messages PCI: Fix code formatting inconsistencies PCI: Fix typos in docs and comments PCI: Fix pci_bus_resetable(), pci_slot_resetable() name typos PCI: Simplify pci_dev_driver() PCI: Simplify pci_pio_to_address() PCI/AER: Simplify AER_RECOVER_RING_SIZE definition PCI: Use consistent put_user() pointer types PCI: Fix printk field formatting PCI: Remove unnecessary initializations PCI: Unexport pcie_port_bus_type PCI: mvebu: Remove unused busn member PCI: Remove unused function declarations PCI/sysfs: Move declarations to linux/pci.h PCI/P2PDMA: Use pci_dev_id() to simplify the code PCI/IOV: Use pci_dev_id() to simplify the code PCI/AER: Use pci_dev_id() to simplify the code PCI: apple: Use pci_dev_id() to simplify the code PCI/DOE: Fix destroy_work_on_stack() race PCI: Explicitly include correct DT includes x86/PCI: Use struct_size() in pirq_convert_irt_table() PCI: Change pdev->rom_attr_enabled to single bit PCI: Reorder pci_dev fields to reduce holes
2023-08-25PCI: Fix typos in docs and commentsBjorn Helgaas1-6/+6
Fix typos in docs and comments. Link: https://lore.kernel.org/r/20230824193712.542167-11-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2023-08-21PCI: Document the Capability accessor RMW improvementsIlpo Järvinen1-5/+9
Documentation claims port service drivers should play nice with respect to PCIe Capability changes, but the concurrency control is now provided in the Capability accessors as long as the correct ones are used. Update the documention to match the RMW accessor behavior. Link: https://lore.kernel.org/r/20230717120503.15276-12-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2023-06-26Merge branch 'pci/controller/endpoint'Bjorn Helgaas2-14/+8
- Change "PCI Endpoint Virtual NTB driver" Kconfig prompt to be different from "PCI Endpoint NTB driver" (Shunsuke Mie) - Automatically create a function specific attributes group for endpoint drivers to avoid reference counting issues (Damien Le Moal) - Move and unexport pci_epf_type_add_cfs() (Damien Le Moal) - Reinitialize EPF test DMA transfer completion before submitting it to avoid losing the completion notification (Damien Le Moal) - Fix EPF test DMA transfer completion detection (Damien Le Moal) - Submit EPF test DMA transfers with dmaengine_submit(), not tx_submit() (Damien Le Moal) - Simplify EPF test read/write/copy functions (Damien Le Moal) - Simplify EPF test "raise IRQ" interface (Damien Le Moal) - Simplify EPF test IRQ command execution (Damien Le Moal) - Improve EPF test command/status register handling (Damien Le Moal) - Free IRQs before removing device (Damien Le Moal) - Reinitialize IRQ completions for every test (Damien Le Moal) - Don't write status in IRQ handler to avoid race (Damien Le Moal) - Fix dma_chan direction in data transfer test (Yoshihiro Shimoda) - Return pci_epf_type_add_cfs() error if EPF has no driver (Damien Le Moal) - Add kernel-doc for pci_epc_raise_irq() and pci_epc_map_msi_irq() MSI vector parameters (Manivannan Sadhasivam) - Pass EPF device ID to driver probe functions (Manivannan Sadhasivam) - Return -EALREADY if EPC has already been started/stopped (Manivannan Sadhasivam) - Add linkdown notifier support and use it in qcom-ep (Manivannan Sadhasivam) - Add Bus Master Enable event support and use it in qcom-ep (Manivannan Sadhasivam) - Add Qualcomm Modem Host Interface (MHI) endpoint driver (Manivannan Sadhasivam) - Add Layerscape PME interrupt handling to manage link-up notification (Frank Li) * pci/controller/endpoint: PCI: layerscape: Add the endpoint linkup notifier support PCI: endpoint: pci-epf-vntb: Fix typo in comments MAINTAINERS: Add PCI MHI endpoint function driver under MHI bus PCI: endpoint: Add PCI Endpoint function driver for MHI bus PCI: qcom-ep: Add support for BME notification PCI: qcom-ep: Add support for Link down notification PCI: endpoint: Add BME notifier support PCI: endpoint: Add linkdown notifier support PCI: endpoint: Return error if EPC is started/stopped multiple times PCI: endpoint: Pass EPF device ID to the probe function PCI: endpoint: Add missing documentation about the MSI/MSI-X range PCI: endpoint: Improve pci_epf_type_add_cfs() PCI: endpoint: functions/pci-epf-test: Fix dma_chan direction misc: pci_endpoint_test: Simplify pci_endpoint_test_msi_irq() misc: pci_endpoint_test: Do not write status in IRQ handler misc: pci_endpoint_test: Re-init completion for every test misc: pci_endpoint_test: Free IRQs before removing the device PCI: epf-test: Simplify transfers result print PCI: epf-test: Simplify DMA support checks PCI: epf-test: Cleanup request result handling PCI: epf-test: Cleanup pci_epf_test_cmd_handler() PCI: epf-test: Improve handling of command and status registers PCI: epf-test: Simplify IRQ test commands execution PCI: epf-test: Simplify pci_epf_test_raise_irq() PCI: epf-test: Simplify read/write/copy test functions PCI: epf-test: Use dmaengine_submit() to initiate DMA transfer PCI: epf-test: Fix DMA transfer completion detection PCI: epf-test: Fix DMA transfer completion initialization PCI: endpoint: Move pci_epf_type_add_cfs() code PCI: endpoint: Automatically create a function specific attributes group PCI: endpoint: Fix a Kconfig prompt of vNTB driver
2023-06-26Merge branch 'pci/misc'Bjorn Helgaas2-2/+2
- Add pci_clear_master() stub for non-CONFIG_PCI (Sui Jingfeng) - Correct documentation typos (Randy Dunlap) * pci/misc: Documentation: PCI: correct spelling PCI: Add pci_clear_master() stub for non-CONFIG_PCI PCI: Expand comment about sorting pci_ids.h entries
2023-06-26Documentation: PCI: correct spellingRandy Dunlap2-2/+2
Correct spelling problems for Documentation/PCI/ as reported by codespell. Link: https://lore.kernel.org/linux-pci/20230209071400.31476-14-rdunlap@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
2023-06-23PCI: endpoint: Automatically create a function specific attributes groupDamien Le Moal2-15/+9
A PCI endpoint function driver can define function specific attributes under its function configfs directory using the add_cfs() endpoint driver operation. This is done by tying up the mkdir operation for the function configfs directory to a call to the add_cfs() operation. However, there are no checks preventing the user from repeatedly creating function specific attribute directories with different names, resulting in the same endpoint specific attributes group being added multiple times, which also result in an invalid reference counting for the attribute groups. E.g., using the pci-epf-ntb function driver as an example, the user creates the function as follows: $ modprobe pci-epf-ntb $ cd /sys/kernel/config/pci_ep/functions/pci_epf_ntb $ mkdir func0 $ tree func0 func0/ |-- baseclass_code |-- cache_line_size |-- ... `-- vendorid $ mkdir func0/attrs $ tree func0 func0/ |-- attrs | |-- db_count | |-- mw1 | |-- mw2 | |-- mw3 | |-- mw4 | |-- num_mws | `-- spad_count |-- baseclass_code |-- cache_line_size |-- ... `-- vendorid At this point, the function can be started by linking the EP controller. However, if the user mistakenly creates again a directory: $ mkdir func0/attrs2 $ tree func0 func0/ |-- attrs | |-- db_count | |-- mw1 | |-- mw2 | |-- mw3 | |-- mw4 | |-- num_mws | `-- spad_count |-- attrs2 | |-- db_count | |-- mw1 | |-- mw2 | |-- mw3 | |-- mw4 | |-- num_mws | `-- spad_count |-- baseclass_code |-- cache_line_size |-- ... `-- vendorid The endpoint function specific attributes are duplicated and cause a crash when the endpoint function device is torn down: refcount_t: addition on 0; use-after-free. WARNING: CPU: 2 PID: 834 at lib/refcount.c:25 refcount_warn_saturate+0xc8/0x144 CPU: 2 PID: 834 Comm: rmdir Not tainted 6.3.0-rc1 #1 Hardware name: Pine64 RockPro64 v2.1 (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) ... Call trace: refcount_warn_saturate+0xc8/0x144 config_item_get+0x7c/0x80 configfs_rmdir+0x17c/0x30c vfs_rmdir+0x8c/0x204 do_rmdir+0x158/0x184 __arm64_sys_unlinkat+0x64/0x80 invoke_syscall+0x48/0x114 ... Fix this by modifying pci_epf_cfs_work() to execute the new function pci_ep_cfs_add_type_group() which itself calls pci_epf_type_add_cfs() to obtain the function specific attribute group and the group name (directory name) from the endpoint function driver. If the function driver defines an attribute group, pci_ep_cfs_add_type_group() then proceeds to register this group using configfs_register_group(), thus automatically exposing the function type specific configfs attributes to the user. E.g.: $ modprobe pci-epf-ntb $ cd /sys/kernel/config/pci_ep/functions/pci_epf_ntb $ mkdir func0 $ tree func0 func0/ |-- baseclass_code |-- cache_line_size |-- ... |-- pci_epf_ntb.0 | |-- db_count | |-- mw1 | |-- mw2 | |-- mw3 | |-- mw4 | |-- num_mws | `-- spad_count |-- primary |-- ... `-- vendorid With this change, there is no need for the user to create or delete directories in the endpoint function attributes directory. The pci_epf_type_group_ops group operations are thus removed. Also update the documentation for the pci-epf-ntb and pci-epf-vntb function drivers to reflect this change, removing the explanations showing the need to manually create the sub-directory for the function specific attributes. Link: https://lore.kernel.org/r/20230415023542.77601-2-dlemoal@kernel.org Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
2023-06-12Documentation: PCI: Tidy AER documentationBjorn Helgaas1-66/+65
Consistently use: PCIe previously PCIe, PCI Express, or pci express Root Port previously Root Port or root port Endpoint previously EndPoint or endpoint AER previously AER or aer please previously pls Also update a few awkward wordings. Link: https://lore.kernel.org/r/20230609222500.1267795-5-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
2023-06-12Documentation: PCI: Update cross references to .rst filesBjorn Helgaas2-3/+3
Change references to *.txt to *.rst to match the current filenames. Link: https://lore.kernel.org/r/20230609222500.1267795-4-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
2023-06-12Documentation: PCI: Drop recommendation to configure AER CapabilityBjorn Helgaas1-54/+2
Since f26e58bf6f54 ("PCI/AER: Enable error reporting when AER is native"), the PCI core enables PCIe device error reporting for all devices during enumeration, so drivers don't need to do it. Remove the recommendation for drivers to configure AER and call pci_enable_pcie_error_reporting() themselves. Also remove the suggestion that drivers may change AER mask and severity registers. Ownership of these registers is negotiated between the OS and platform firmware. If firmware owns these registers, the OS must not change them. Link: https://lore.kernel.org/r/20230609222500.1267795-3-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
2023-03-19ixgb: Remove ixgb driverTony Nguyen1-1/+0
There are likely no users of this driver as the hardware has been discontinued since 2010. Remove the driver and all references to it in documentation. Suggested-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2023-01-25Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed ↵SeongJae Park1-3/+3
documents Some documents that listed on subsystem-apis have 'Linux' or 'The Linux' title prefixes. It's duplicated information, and makes finding the document of interest with human eyes not easy. Remove the prefixes from the titles. Signed-off-by: SeongJae Park <sj@kernel.org> Acked-by: Iwona Winiarska <iwona.winiarska@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20230122184834.181977-1-sj@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-12-13Merge tag 'cxl-for-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxlLinus Torvalds1-0/+7
Pull cxl updates from Dan Williams: "Compute Express Link (CXL) updates for 6.2. While it may seem backwards, the CXL update this time around includes some focus on CXL 1.x enabling where the work to date had been with CXL 2.0 (VH topologies) in mind. First generation CXL can mostly be supported via BIOS, similar to DDR, however it became clear there are use cases for OS native CXL error handling and some CXL 3.0 endpoint features can be deployed on CXL 1.x hosts (Restricted CXL Host (RCH) topologies). So, this update brings RCH topologies into the Linux CXL device model. In support of the ongoing CXL 2.0+ enabling two new core kernel facilities are added. One is the ability for the kernel to flag collisions between userspace access to PCI configuration registers and kernel accesses. This is brought on by the PCIe Data-Object-Exchange (DOE) facility, a hardware mailbox over config-cycles. The other is a cpu_cache_invalidate_memregion() API that maps to wbinvd_on_all_cpus() on x86. To prevent abuse it is disabled in guest VMs and architectures that do not support it yet. The CXL paths that need it, dynamic memory region creation and security commands (erase / unlock), are disabled when it is not present. As for the CXL 2.0+ this cycle the subsystem gains support Persistent Memory Security commands, error handling in response to PCIe AER notifications, and support for the "XOR" host bridge interleave algorithm. Summary: - Add the cpu_cache_invalidate_memregion() API for cache flushing in response to physical memory reconfiguration, or memory-side data invalidation from operations like secure erase or memory-device unlock. - Add a facility for the kernel to warn about collisions between kernel and userspace access to PCI configuration registers - Add support for Restricted CXL Host (RCH) topologies (formerly CXL 1.1) - Add handling and reporting of CXL errors reported via the PCIe AER mechanism - Add support for CXL Persistent Memory Security commands - Add support for the "XOR" algorithm for CXL host bridge interleave - Rework / simplify CXL to NVDIMM interactions - Miscellaneous cleanups and fixes" * tag 'cxl-for-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (71 commits) cxl/region: Fix memdev reuse check cxl/pci: Remove endian confusion cxl/pci: Add some type-safety to the AER trace points cxl/security: Drop security command ioctl uapi cxl/mbox: Add variable output size validation for internal commands cxl/mbox: Enable cxl_mbox_send_cmd() users to validate output size cxl/security: Fix Get Security State output payload endian handling cxl: update names for interleave ways conversion macros cxl: update names for interleave granularity conversion macros cxl/acpi: Warn about an invalid CHBCR in an existing CHBS entry tools/testing/cxl: Require cache invalidation bypass cxl/acpi: Fail decoder add if CXIMS for HBIG is missing cxl/region: Fix spelling mistake "memergion" -> "memregion" cxl/regs: Fix sparse warning cxl/acpi: Set ACPI's CXL _OSC to indicate RCD mode support tools/testing/cxl: Add an RCH topology cxl/port: Add RCD endpoint port enumeration cxl/mem: Move devm_cxl_add_endpoint() from cxl_core to cxl_mem tools/testing/cxl: Add XOR Math support to cxl_test cxl/acpi: Support CXL XOR Interleave Math (CXIMS) ...
2022-12-04PCI/AER: Add optional logging callback for correctable errorDave Jiang1-0/+7
Some new devices such as CXL devices may want to record additional error information on a corrected error. Add a callback to allow the PCI device driver to do additional logging such as providing additional stats for user space RAS monitoring. For CXL device, this is actually a need due to CXL needing to write to the CXL RAS capability structure correctable error status register in order to clear the unmasked correctable errors. See CXL spec rev3.0 8.2.4.16. Suggested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/166984619233.2804404.3966368388544312674.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2022-11-17Documentation: PCI: Add reference to PCI/MSI device driver APIsAhmed S. Darwish1-0/+10
All exported device-driver MSI APIs are now grouped in one place at drivers/pci/msi/api.c with comprehensive kernel-docs added. Reference these kernel-docs in the official PCI/MSI howto. Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20221111122015.397739421@linutronix.de
2022-08-14Merge tag 'ntb-5.20' of https://github.com/jonmason/ntbLinus Torvalds3-0/+298
Pull NTB updates from Jon Mason: "Non-Transparent Bridge updates. Fix of heap data and clang warnings, support for a new Intel NTB device, and NTB EndPoint Function (EPF) support and the various fixes for that" * tag 'ntb-5.20' of https://github.com/jonmason/ntb: MAINTAINERS: add PCI Endpoint NTB drivers to NTB files NTB: EPF: Tidy up some bounds checks NTB: EPF: Fix error code in epf_ntb_bind() PCI: endpoint: pci-epf-vntb: reduce several globals to statics PCI: endpoint: pci-epf-vntb: fix error handle in epf_ntb_mw_bar_init() PCI: endpoint: Fix Kconfig dependency NTB: EPF: set pointer addr to null using NULL rather than 0 Documentation: PCI: extend subheading underline for "lspci output" section Documentation: PCI: Use code-block block for scratchpad registers diagram Documentation: PCI: Add specification for the PCI vNTB function device PCI: endpoint: Support NTB transfer between RC and EP NTB: epf: Allow more flexibility in the memory BAR map method PCI: designware-ep: Allow pci_epc_set_bar() update inbound map address ntb: intel: add GNR support for Intel PCIe gen5 NTB NTB: ntb_tool: uninitialized heap data in tool_fn_write() ntb: idt: fix clang -Wformat warnings
2022-08-10Documentation: PCI: extend subheading underline for "lspci output" sectionBagas Sanjaya1-1/+1
The underline syntax for "lspci output..." section is off-by-one less than the section heading's length, hence triggers the warning: Documentation/PCI/endpoint/pci-vntb-howto.rst:131: WARNING: Title underline too short. Extend the underline by one to match the heading length. Link: https://lore.kernel.org/linux-next/20220621200235.211b2e32@canb.auug.org.au/ Fixes: 0c4b285d9636cc ("Documentation: PCI: Add specification for the PCI vNTB function device") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Lorenzo Pieralisi <lpieralisi@kernel.org> Cc: "Krzysztof Wilczyński" <kw@linux.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Frank Li <Frank.Li@nxp.com> Cc: linux-pci@vger.kernel.org Cc: linux-next@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2022-08-10Documentation: PCI: Use code-block block for scratchpad registers diagramBagas Sanjaya1-1/+4
The diagram in "Scratchpad Registers" isn't formatted inside code block, hence triggers indentation warning: Documentation/PCI/endpoint/pci-vntb-function.rst:82: WARNING: Unexpected indentation. Fix the warning by using code-block directive to format the diagram inside code block, as in other diagrams in Documentation/. While at it, unindent the preceeding text. Link: https://lore.kernel.org/linux-next/20220621200235.211b2e32@canb.auug.org.au/ Fixes: 0c4b285d9636cc ("Documentation: PCI: Add specification for the PCI vNTB function device") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Lorenzo Pieralisi <lpieralisi@kernel.org> Cc: "Krzysztof Wilczyński" <kw@linux.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Frank Li <Frank.Li@nxp.com> Cc: linux-pci@vger.kernel.org Cc: linux-next@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2022-08-10Documentation: PCI: Add specification for the PCI vNTB function deviceFrank Li3-0/+295
Add specification for the PCI vNTB function device. The endpoint function driver and the host PCI driver should be created based on this specification. Signed-off-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2022-08-04Merge branch 'pci/resource'Bjorn Helgaas1-1/+1
- Replace sparc pci_mmap_page_range() wrapper. This still leaves a sparc-specific pci_mmap_resource_range(), but it's only one interface instead of two (Arnd Bergmann) - Remove sparc-specific pci_mmap_resource_range() by implementing pci_iobar_pfn(). This removes the ability to map the entire PCI I/O space using /proc/bus/pci, but we believe that's already been broken since v2.6.28 (Arnd Bergmann) * pci/resource: sparc: Use generic pci_mmap_resource_range() PCI: Remove pci_mmap_page_range() wrapper
2022-07-29PCI: Remove pci_mmap_page_range() wrapperArnd Bergmann1-1/+1
The ARCH_GENERIC_PCI_MMAP_RESOURCE symbol came up in a recent discussion, and I noticed that this was left behind by an unfinished cleanup from 2017. The only architecture that still relies on providing its own pci_mmap_page_range() helper instead of using the generic pci_mmap_resource_range() is sparc. Presumably the reasons for this have not changed, but at least this can be simplified by converting sparc to use the same interface as the others. The only difference between the two is the device-specific offset that gets added to or subtracted from vma->vm_pgoff. Change the only caller of pci_mmap_page_range() in common code to subtract this offset and call the modern interface, while adding it back in the sparc implementation to preserve the existing behavior. This removes the complexities of the dual interfaces from the common code, and keeps it all specific to the sparc architecture code. According to David Miller, the sparc code lets user space poke into the VGA I/O port registers by mmapping the I/O space of the parent bridge device, which is something that the generic pci_mmap_resource_range() code apparently does not. Link: https://lore.kernel.org/lkml/1519887203.622.3.camel@infradead.org/t/ Link: https://lore.kernel.org/lkml/20220714214657.2402250-3-shorne@gmail.com/ Link: https://lore.kernel.org/r/20220715153617.3393420-1-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: David S. Miller <davem@davemloft.net> Cc: Stafford Horne <shorne@gmail.com>
2022-07-12PCI/doc: Convert examples to generic power managementBjorn Helgaas1-4/+3
PCI-specific power management (pci_driver.suspend and pci_driver.resume) is deprecated. Convert sample code to the generic power management framework. Link: https://lore.kernel.org/r/20220607232946.355987-1-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2022-04-21PCI/doc: Update obsolete pci_set_dma_mask() referencesAlex Williamson1-2/+2
The function is dma_set_mask(), fix a missed instance of the old pci_set_dma_mask() and a reference to a function that doesn't exist. Fixes: 05b0ebd06ae6 ("PCI/doc: cleanup references to the legacy PCI DMA API") Link: https://lore.kernel.org/r/165048747271.2959320.13475081883467312497.stgit@omen Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2022-03-30PCI/doc: cleanup references to the legacy PCI DMA APIChristoph Hellwig1-7/+7
Mention the regular DMA API calls instead of the now removed PCI DMA API. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
2021-09-08Merge tag 'pci-v5.15-changes' of ↵Linus Torvalds1-1/+11
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Enumeration: - Convert controller drivers to generic_handle_domain_irq() (Marc Zyngier) - Simplify VPD (Vital Product Data) access and search (Heiner Kallweit) - Update bnx2, bnx2x, bnxt, cxgb4, cxlflash, sfc, tg3 drivers to use simplified VPD interfaces (Heiner Kallweit) - Run Max Payload Size quirks before configuring MPS; work around ASMedia ASM1062 SATA MPS issue (Marek Behún) Resource management: - Refactor pci_ioremap_bar() and pci_ioremap_wc_bar() (Krzysztof Wilczyński) - Optimize pci_resource_len() to reduce kernel size (Zhen Lei) PCI device hotplug: - Fix a double unmap in ibmphp (Vishal Aslot) PCIe port driver: - Enable Bandwidth Notification only if port supports it (Stuart Hayes) Sysfs/proc/syscalls: - Add schedule point in proc_bus_pci_read() (Krzysztof Wilczyński) - Return ~0 data on pciconfig_read() CAP_SYS_ADMIN failure (Krzysztof Wilczyński) - Return "int" from pciconfig_read() syscall (Krzysztof Wilczyński) Virtualization: - Extend "pci=noats" to also turn on Translation Blocking to protect against some DMA attacks (Alex Williamson) - Add sysfs mechanism to control the type of reset used between device assignments to VMs (Amey Narkhede) - Add support for ACPI _RST reset method (Shanker Donthineni) - Add ACS quirks for Cavium multi-function devices (George Cherian) - Add ACS quirks for NXP LX2xx0 and LX2xx2 platforms (Wasim Khan) - Allow HiSilicon AMBA devices that appear as fake PCI devices to use PASID and SVA (Zhangfei Gao) Endpoint framework: - Add support for SR-IOV Endpoint devices (Kishon Vijay Abraham I) - Zero-initialize endpoint test tool parameters so we don't use random parameters (Shunyong Yang) APM X-Gene PCIe controller driver: - Remove redundant dev_err() call in xgene_msi_probe() (ErKun Yang) Broadcom iProc PCIe controller driver: - Don't fail devm_pci_alloc_host_bridge() on missing 'ranges' because it's optional on BCMA devices (Rob Herring) - Fix BCMA probe resource handling (Rob Herring) Cadence PCIe driver: - Work around J7200 Link training electrical issue by increasing delays in LTSSM (Nadeem Athani) Intel IXP4xx PCI controller driver: - Depend on ARCH_IXP4XX to avoid useless config questions (Geert Uytterhoeven) Intel Keembay PCIe controller driver: - Add Intel Keem Bay PCIe controller (Srikanth Thokala) Marvell Aardvark PCIe controller driver: - Work around config space completion handling issues (Evan Wang) - Increase timeout for config access completions (Pali Rohár) - Emulate CRS Software Visibility bit (Pali Rohár) - Configure resources from DT 'ranges' property to fix I/O space access (Pali Rohár) - Serialize INTx mask/unmask (Pali Rohár) MediaTek PCIe controller driver: - Add MT7629 support in DT (Chuanjia Liu) - Fix an MSI issue (Chuanjia Liu) - Get syscon regmap ("mediatek,generic-pciecfg"), IRQ number ("pci_irq"), PCI domain ("linux,pci-domain") from DT properties if present (Chuanjia Liu) Microsoft Hyper-V host bridge driver: - Add ARM64 support (Boqun Feng) - Support "Create Interrupt v3" message (Sunil Muthuswamy) NVIDIA Tegra PCIe controller driver: - Use seq_puts(), move err_msg from stack to static, fix OF node leak (Christophe JAILLET) NVIDIA Tegra194 PCIe driver: - Disable suspend when in Endpoint mode (Om Prakash Singh) - Fix MSI-X address programming error (Om Prakash Singh) - Disable interrupts during suspend to avoid spurious AER link down (Om Prakash Singh) Renesas R-Car PCIe controller driver: - Work around hardware issue that prevents Link L1->L0 transition (Marek Vasut) - Fix runtime PM refcount leak (Dinghao Liu) Rockchip DesignWare PCIe controller driver: - Add Rockchip RK356X host controller driver (Simon Xue) TI J721E PCIe driver: - Add support for J7200 and AM64 (Kishon Vijay Abraham I) Toshiba Visconti PCIe controller driver: - Add Toshiba Visconti PCIe host controller driver (Nobuhiro Iwamatsu) Xilinx NWL PCIe controller driver: - Enable PCIe reference clock via CCF (Hyun Kwon) Miscellaneous: - Convert sta2x11 from 'pci_' to 'dma_' API (Christophe JAILLET) - Fix pci_dev_str_match_path() alloc while atomic bug (used for kernel parameters that specify devices) (Dan Carpenter) - Remove pointless Precision Time Management warning when PTM is present but not enabled (Jakub Kicinski) - Remove surplus "break" statements (Krzysztof Wilczyński)" * tag 'pci-v5.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (132 commits) PCI: ibmphp: Fix double unmap of io_mem x86/PCI: sta2x11: switch from 'pci_' to 'dma_' API PCI/VPD: Use unaligned access helpers PCI/VPD: Clean up public VPD defines and inline functions cxgb4: Use pci_vpd_find_id_string() to find VPD ID string PCI/VPD: Add pci_vpd_find_id_string() PCI/VPD: Include post-processing in pci_vpd_find_tag() PCI/VPD: Stop exporting pci_vpd_find_info_keyword() PCI/VPD: Stop exporting pci_vpd_find_tag() PCI: Set dma-can-stall for HiSilicon chips PCI: rockchip-dwc: Add Rockchip RK356X host controller driver PCI: dwc: Remove surplus break statement after return PCI: artpec6: Remove local code block from switch statement PCI: artpec6: Remove surplus break statement after return MAINTAINERS: Add entries for Toshiba Visconti PCIe controller PCI: visconti: Add Toshiba Visconti PCIe host controller driver PCI/portdrv: Enable Bandwidth Notification only if port supports it PCI: Allow PASID on fake PCIe devices without TLP prefixes PCI: mediatek: Use PCI domain to handle ports detection PCI: mediatek: Add new method to get irq number ...
2021-08-26PCI: Add 'override_only' field to struct pci_device_idMax Gurtovoy1-0/+1
Add 'override_only' field to struct pci_device_id to be used as part of pci_match_device(). When set, a driver only matches the entry when dev->driver_override is set to that driver. In addition, add a helper macro named 'PCI_DEVICE_DRIVER_OVERRIDE' to enable setting some data on it. Next patch from this series will use the above functionality. Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20210826103912.128972-10-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-08-19Documentation: PCI: endpoint/pci-endpoint-cfs: Guide to use SR-IOVKishon Vijay Abraham I1-1/+11
Add Documentation to help users use PCI endpoint to create virtual functions using configfs. An endpoint function is designated as a virtual endpoint function device when it is linked to a physical endpoint function device (instead of a endpoint controller). Link: https://lore.kernel.org/r/20210819123343.1951-9-kishon@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2021-07-08Merge tag 'pci-v5.14-changes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull pci updates from Bjorn Helgaas: "Enumeration: - Fix dsm_label_utf16s_to_utf8s() buffer overrun (Krzysztof Wilczyński) - Rely on lengths from scnprintf(), dsm_label_utf16s_to_utf8s() (Krzysztof Wilczyński) - Use sysfs_emit() and sysfs_emit_at() in "show" functions (Krzysztof Wilczyński) - Fix 'resource_alignment' newline issues (Krzysztof Wilczyński) - Add 'devspec' newline (Krzysztof Wilczyński) - Dynamically map ECAM regions (Russell King) Resource management: - Coalesce host bridge contiguous apertures (Kai-Heng Feng) PCIe native device hotplug: - Ignore Link Down/Up caused by DPC (Lukas Wunner) Power management: - Leave Apple Thunderbolt controllers on for s2idle or standby (Konstantin Kharlamov) Virtualization: - Work around Huawei Intelligent NIC VF FLR erratum (Chiqijun) - Clarify error message for unbound IOV devices (Moritz Fischer) - Add pci_reset_bus_function() Secondary Bus Reset interface (Raphael Norwitz) Peer-to-peer DMA: - Simplify distance calculation (Christoph Hellwig) - Finish RCU conversion of pdev->p2pdma (Eric Dumazet) - Rename upstream_bridge_distance() and rework doc (Logan Gunthorpe) - Collect acs list in stack buffer to avoid sleeping (Logan Gunthorpe) - Use correct calc_map_type_and_dist() return type (Logan Gunthorpe) - Warn if host bridge not in whitelist (Logan Gunthorpe) - Refactor pci_p2pdma_map_type() (Logan Gunthorpe) - Avoid pci_get_slot(), which may sleep (Logan Gunthorpe) Altera PCIe controller driver: - Add Joyce Ooi as Altera PCIe maintainer (Joyce Ooi) Broadcom iProc PCIe controller driver: - Fix multi-MSI base vector number allocation (Sandor Bodo-Merle) - Support multi-MSI only on uniprocessor kernel (Sandor Bodo-Merle) Freescale i.MX6 PCIe controller driver: - Limit DBI register length for imx6qp PCIe (Richard Zhu) - Add "vph-supply" for PHY supply voltage (Richard Zhu) - Enable PHY internal regulator when supplied >3V (Richard Zhu) - Remove imx6_pcie_probe() redundant error message (Zhen Lei) Intel Gateway PCIe controller driver: - Fix INTx enable (Martin Blumenstingl) Marvell Aardvark PCIe controller driver: - Fix checking for PIO Non-posted Request (Pali Rohár) - Implement workaround for the readback value of VEND_ID (Pali Rohár) MediaTek PCIe controller driver: - Remove redundant error printing in mtk_pcie_subsys_powerup() (Zhen Lei) MediaTek PCIe Gen3 controller driver: - Add missing MODULE_DEVICE_TABLE (Zou Wei) Microchip PolarFlare PCIe controller driver: - Make struct event_descs static (Krzysztof Wilczyński) Microsoft Hyper-V host bridge driver: - Fix race condition when removing the device (Long Li) - Remove bus device removal unused refcount/functions (Long Li) Mobiveil PCIe controller driver: - Remove unused readl and writel functions (Krzysztof Wilczyński) NVIDIA Tegra PCIe controller driver: - Add missing MODULE_DEVICE_TABLE (Zou Wei) NVIDIA Tegra194 PCIe controller driver: - Fix tegra_pcie_ep_raise_msi_irq() ill-defined shift (Jon Hunter) - Fix host initialization during resume (Vidya Sagar) Rockchip PCIe controller driver: - Register IRQ handlers after device and data are ready (Javier Martinez Canillas)" * tag 'pci-v5.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits) PCI/P2PDMA: Finish RCU conversion of pdev->p2pdma PCI: xgene: Annotate __iomem pointer PCI: Fix kernel-doc formatting PCI: cpcihp: Declare cpci_debug in header file MAINTAINERS: Add Joyce Ooi as Altera PCIe maintainer PCI: rockchip: Register IRQ handlers after device and data are ready PCI: tegra194: Fix tegra_pcie_ep_raise_msi_irq() ill-defined shift PCI: aardvark: Implement workaround for the readback value of VEND_ID PCI: aardvark: Fix checking for PIO Non-posted Request PCI: tegra194: Fix host initialization during resume PCI: tegra: Add missing MODULE_DEVICE_TABLE PCI: imx6: Enable PHY internal regulator when supplied >3V dt-bindings: imx6q-pcie: Add "vph-supply" for PHY supply voltage PCI: imx6: Limit DBI register length for imx6qp PCIe PCI: imx6: Remove imx6_pcie_probe() redundant error message PCI: intel-gw: Fix INTx enable PCI: iproc: Support multi-MSI only on uniprocessor kernel PCI: iproc: Fix multi-MSI base vector number allocation PCI: mediatek-gen3: Add missing MODULE_DEVICE_TABLE PCI: Dynamically map ECAM regions ...
2021-06-17docs: PCI: pci.rst: avoid using ReST :doc:`foo` markupMauro Carvalho Chehab1-3/+3
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/8697cf945390f6b45fefb4c5fe22ed1c8070e32e.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-06-17docs: PCI: endpoint: pci-endpoint-cfs.rst: avoid using ReST :doc:`foo` markupMauro Carvalho Chehab1-1/+1
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/4b18febe4a4f030dd9d43e5e6a2a0aa28bd5b734.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-06-17docs: PCI: Replace non-breaking spaces to avoid PDF issuesMauro Carvalho Chehab1-9/+9
The conversion tools used during DocBook/LaTeX/html/Markdown->ReST conversion and some cut-and-pasted text contain some characters that aren't easily reachable on standard keyboards and/or could cause troubles when parsed by the documentation build system. Replace the occurences of the following characters: - U+00a0 (' '): NO-BREAK SPACE as it can cause lines being truncated on PDF output Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/8036126a59adb720dbc9233341ad5a08531cf73f.1623826294.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-06-01Documentation: PCI: Fix typo in pci-error-recovery.rstWesley Sheng1-1/+1
Replace "It" with "If", since it is a conditional statement. Link: https://lore.kernel.org/r/20210531081215.43507-1-wesley.sheng@amd.com Signed-off-by: Wesley Sheng <wesley.sheng@amd.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
2021-02-23Documentation: PCI: Add PCI endpoint NTB function user guideKishon Vijay Abraham I2-0/+162
Add documentation to help users use pci-epf-ntb function driver and existing host side NTB infrastructure for NTB functionality. [bhelgaas: fix a few typos] Link: https://lore.kernel.org/r/20210201195809.7342-18-kishon@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
2021-02-23Documentation: PCI: Add configfs binding documentation for pci-ntb endpoint ↵Kishon Vijay Abraham I2-0/+39
function Add binding documentation for pci-ntb endpoint function that helps in adding and configuring pci-ntb endpoint function. Link: https://lore.kernel.org/r/20210201195809.7342-17-kishon@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-02-23PCI: endpoint: Add support in configfs to associate two EPCs with EPFKishon Vijay Abraham I1-0/+10
Now that PCI endpoint core supports to add secondary endpoint controller (EPC) with endpoint function (EPF), Add support in configfs to associate two EPCs with EPF. This creates "primary" and "secondary" directory inside the directory created by users for EPF device. Users have to add a symlink of endpoint controller (pci_ep/controllers/) to "primary" or "secondary" directory to bind EPF to primary and secondary EPF interfaces respectively. Existing method of linking directory representing EPF device to directory representing EPC device to associate a single EPC device with a EPF device will continue to work. Link: https://lore.kernel.org/r/20210201195809.7342-8-kishon@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-02-23Documentation: PCI: Add specification for the PCI NTB function deviceKishon Vijay Abraham I2-0/+349
Add specification for the PCI NTB function device. The endpoint function driver and the host PCI driver should be created based on this specification. [bhelgaas: fix a few typos] Link: https://lore.kernel.org/r/20210201195809.7342-2-kishon@ti.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2020-10-09Documentation: better locations for sysfs-pci, sysfs-taggingJohn Hubbard2-0/+139
sysfs-pci and sysfs-tagging were mis-filed: their locations within Documentation/ implied that they were related to file systems. Actually, each topic is about a very specific *use* of sysfs, and sysfs *happens* to be a (virtual) filesystem, so this is not really the right place. It's jarring to be reading about filesystems in general and then come across these specific details about PCI, and tagging...and then back to general filesystems again. Move sysfs-pci to PCI, and move sysfs-tagging to networking. (Thanks to Jonathan Corbet for coming up with the final locations.) Signed-off-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/20201009070128.118639-1-jhubbard@nvidia.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-08-08Merge tag 'pci-v5.9-changes' of ↵Linus Torvalds2-9/+8
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Enumeration: - Fix pci_cfg_wait queue locking problem (Bjorn Helgaas) - Convert PCIe capability PCIBIOS errors to errno (Bolarinwa Olayemi Saheed) - Align PCIe capability and PCI accessor return values (Bolarinwa Olayemi Saheed) - Fix pci_create_slot() reference count leak (Qiushi Wu) - Announce device after early fixups (Tiezhu Yang) PCI device hotplug: - Make rpadlpar functions static (Wei Yongjun) Driver binding: - Add device even if driver attach failed (Rajat Jain) Virtualization: - xen: Remove redundant initialization of irq (Colin Ian King) IOMMU: - Add pci_pri_supported() to check device or associated PF (Ashok Raj) - Release IVRS table in AMD ACS quirk (Hanjun Guo) - Mark AMD Navi10 GPU rev 0x00 ATS as broken (Kai-Heng Feng) - Treat "external-facing" devices themselves as internal (Rajat Jain) MSI: - Forward MSI-X error code in pci_alloc_irq_vectors_affinity() (Piotr Stankiewicz) Error handling: - Clear PCIe Device Status errors only if OS owns AER (Jonathan Cameron) - Log correctable errors as warning, not error (Matt Jolly) - Use 'pci_channel_state_t' instead of 'enum pci_channel_state' (Luc Van Oostenryck) Peer-to-peer DMA: - Allow P2PDMA on AMD Zen and newer CPUs (Logan Gunthorpe) ASPM: - Add missing newline in sysfs 'policy' (Xiongfeng Wang) Native PCIe controllers: - Convert to devm_platform_ioremap_resource_byname() (Dejin Zheng) - Convert to devm_platform_ioremap_resource() (Dejin Zheng) - Remove duplicate error message from devm_pci_remap_cfg_resource() callers (Dejin Zheng) - Fix runtime PM imbalance on error (Dinghao Liu) - Remove dev_err() when handing an error from platform_get_irq() (Krzysztof Wilczyński) - Use pci_host_bridge.windows list directly instead of splicing in a temporary list for cadence, mvebu, host-common (Rob Herring) - Use pci_host_probe() instead of open-coding all the pieces for altera, brcmstb, iproc, mobiveil, rcar, rockchip, tegra, v3, versatile, xgene, xilinx, xilinx-nwl (Rob Herring) - Default host bridge parent device to the platform device (Rob Herring) - Use pci_is_root_bus() instead of tracking root bus number separately in aardvark, designware (imx6, keystone, designware-host), mobiveil, xilinx-nwl, xilinx, rockchip, rcar (Rob Herring) - Set host bridge bus number in pci_scan_root_bus_bridge() instead of each driver for aardvark, designware-host, host-common, mediatek, rcar, tegra, v3-semi (Rob Herring) - Move DT resource setup into devm_pci_alloc_host_bridge() (Rob Herring) - Set bridge map_irq and swizzle_irq to default functions; drivers that don't support legacy IRQs (iproc) need to undo this (Rob Herring) ARM Versatile PCIe controller driver: - Drop flag PCI_ENABLE_PROC_DOMAINS (Rob Herring) Cadence PCIe controller driver: - Use "dma-ranges" instead of "cdns,no-bar-match-nbits" property (Kishon Vijay Abraham I) - Remove "mem" from reg binding (Kishon Vijay Abraham I) - Fix cdns_pcie_{host|ep}_setup() error path (Kishon Vijay Abraham I) - Convert all r/w accessors to perform only 32-bit accesses (Kishon Vijay Abraham I) - Add support to start link and verify link status (Kishon Vijay Abraham I) - Allow pci_host_bridge to have custom pci_ops (Kishon Vijay Abraham I) - Add new *ops* for CPU addr fixup (Kishon Vijay Abraham I) - Fix updating Vendor ID and Subsystem Vendor ID register (Kishon Vijay Abraham I) - Use bridge resources for outbound window setup (Rob Herring) - Remove private bus number and range storage (Rob Herring) Cadence PCIe endpoint driver: - Add MSI-X support (Alan Douglas) HiSilicon PCIe controller driver: - Remove non-ECAM HiSilicon hip05/hip06 driver (Rob Herring) Intel VMD host bridge driver: - Use Shadow MEMBAR registers for QEMU/KVM guests (Jon Derrick) Loongson PCIe controller driver: - Use DECLARE_PCI_FIXUP_EARLY for bridge_class_quirk() (Tiezhu Yang) Marvell Aardvark PCIe controller driver: - Indicate error in 'val' when config read fails (Pali Rohár) - Don't touch PCIe registers if no card connected (Pali Rohár) Marvell MVEBU PCIe controller driver: - Setup BAR0 in order to fix MSI (Shmuel Hazan) Microsoft Hyper-V host bridge driver: - Fix a timing issue which causes kdump to fail occasionally (Wei Hu) - Make some functions static (Wei Yongjun) NVIDIA Tegra PCIe controller driver: - Revert tegra124 raw_violation_fixup (Nicolas Chauvet) - Remove PLL power supplies (Thierry Reding) Qualcomm PCIe controller driver: - Change duplicate PCI reset to phy reset (Abhishek Sahu) - Add missing ipq806x clocks in PCIe driver (Ansuel Smith) - Add missing reset for ipq806x (Ansuel Smith) - Add ext reset (Ansuel Smith) - Use bulk clk API and assert on error (Ansuel Smith) - Add support for tx term offset for rev 2.1.0 (Ansuel Smith) - Define some PARF params needed for ipq8064 SoC (Ansuel Smith) - Add ipq8064 rev2 variant (Ansuel Smith) - Support PCI speed set for ipq806x (Sham Muthayyan) Renesas R-Car PCIe controller driver: - Use devm_pci_alloc_host_bridge() (Rob Herring) - Use struct pci_host_bridge.windows list directly (Rob Herring) - Convert rcar-gen2 to use modern host bridge probe functions (Rob Herring) TI J721E PCIe driver: - Add TI J721E PCIe host and endpoint driver (Kishon Vijay Abraham I) Xilinx Versal CPM PCIe controller driver: - Add Versal CPM Root Port driver and YAML schema (Bharat Kumar Gogada) MicroSemi Switchtec management driver: - Add missing __iomem and __user tags to fix sparse warnings (Logan Gunthorpe) Miscellaneous: - Replace http:// links with https:// (Alexander A. Klimov) - Replace lkml.org, spinics, gmane with lore.kernel.org (Bjorn Helgaas) - Remove unused pci_lost_interrupt() (Heiner Kallweit) - Move PCI_VENDOR_ID_REDHAT definition to pci_ids.h (Huacai Chen) - Fix kerneldoc warnings (Krzysztof Kozlowski)" * tag 'pci-v5.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (113 commits) PCI: Fix kerneldoc warnings PCI: xilinx-cpm: Add Versal CPM Root Port driver PCI: xilinx-cpm: Add YAML schemas for Versal CPM Root Port PCI: Set bridge map_irq and swizzle_irq to default functions PCI: Move DT resource setup into devm_pci_alloc_host_bridge() PCI: rcar-gen2: Convert to use modern host bridge probe functions PCI: Remove dev_err() when handing an error from platform_get_irq() MAINTAINERS: Add Kishon Vijay Abraham I for TI J721E SoC PCIe misc: pci_endpoint_test: Add J721E in pci_device_id table PCI: j721e: Add TI J721E PCIe driver PCI: switchtec: Add missing __iomem tag to fix sparse warnings PCI: switchtec: Add missing __iomem and __user tags to fix sparse warnings PCI: rpadlpar: Make functions static PCI/P2PDMA: Allow P2PDMA on AMD Zen and newer CPUs PCI: Release IVRS table in AMD ACS quirk PCI: Announce device after early fixups PCI: Mark AMD Navi10 GPU rev 0x00 ATS as broken PCI: Remove unused pci_lost_interrupt() dt-bindings: PCI: Add EP mode dt-bindings for TI's J721E SoC dt-bindings: PCI: Add host mode dt-bindings for TI's J721E SoC ...
2020-08-06Merge branch 'pci/misc'Bjorn Helgaas1-5/+4
- Convert PCIe capability PCIBIOS errors to errno (Bolarinwa Olayemi Saheed) - Align PCIe capability and PCI accessor return values (Bolarinwa Olayemi Saheed) - Replace http:// links with https:// (Alexander A. Klimov) - Replace lkml.org, spinics, gmane with lore.kernel.org (Bjorn Helgaas) - Update panic message to mention kzalloc(), not kmalloc() (Liao Pingfang) - Move PCI_VENDOR_ID_REDHAT definition to pci_ids.h (Huacai Chen) - Remove unused pci_lost_interrupt() (Heiner Kallweit) * pci/misc: PCI: Remove unused pci_lost_interrupt() PCI: Move PCI_VENDOR_ID_REDHAT definition to pci_ids.h PCI: Fix error in panic message PCI: Replace lkml.org, spinics, gmane with lore.kernel.org PCI: Replace http:// links with https:// PCI: Align PCIe capability and PCI accessor return values PCI: Convert PCIe capability PCIBIOS errors to errno
2020-07-08PCI: Use 'pci_channel_state_t' instead of 'enum pci_channel_state'Luc Van Oostenryck1-4/+4
The method struct pci_error_handlers.error_detected() is defined and documented as taking an 'enum pci_channel_state' for the second argument, but most drivers use 'pci_channel_state_t' instead. This 'pci_channel_state_t' is not a typedef for the enum but a typedef for a bitwise type in order to have better/stricter typechecking. Consolidate everything by using 'pci_channel_state_t' in the method's definition, in the related helpers and in the drivers. Enforce use of 'pci_channel_state_t' by replacing 'enum pci_channel_state' with an anonymous 'enum'. Note: Currently, from a typechecking point of view this patch changes nothing because only the constants defined by the enum are bitwise, not the enum itself (sparse doesn't have the notion of 'bitwise enum'). This may change in some not too far future, hence the patch. [bhelgaas: squash in https://lore.kernel.org/r/20200702162651.49526-3-luc.vanoostenryck@gmail.com https://lore.kernel.org/r/20200702162651.49526-4-luc.vanoostenryck@gmail.com] Link: https://lore.kernel.org/r/20200702162651.49526-2-luc.vanoostenryck@gmail.com Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2020-07-05Documentation: PCI: pci.rst: drop doubled wordsRandy Dunlap1-1/+1
Drop the doubled word "when". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-pci@vger.kernel.org Link: https://lore.kernel.org/r/20200703212156.30453-5-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-07-05Documentation: PCI: pci-error-recovery: drop doubled wordsRandy Dunlap1-1/+1
Drop the doubled word "the". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Linas Vepstas <linasvepstas@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Linas Vepstas <linasvepstas@gmail.com> Cc: linux-pci@vger.kernel.org Link: https://lore.kernel.org/r/20200703212156.30453-4-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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