linux/Documentation/PCI, branch v6.13

Merge branch 'pci/endpoint'

2024-11-25T19:40:56Z

- Add pci_epc_function_is_valid() to avoid repeating common validation checks (Damien Le Moal) - Skip attempts to allocate from endpoint controller memory window if the requested size is larger than the window (Damien Le Moal) - Add and document pci_epc_mem_map() and pci_epc_mem_unmap() to handle controller-specific size and alignment constraints, and add test cases to the endpoint test driver (Damien Le Moal) - Implement dwc pci_epc_ops.align_addr() so pci_epc_mem_map() can observe DWC-specific alignment requirements (Damien Le Moal) - Synchronously cancel command handler work in endpoint test before cleaning up DMA and BARs (Damien Le Moal) - Respect endpoint page size in dw_pcie_ep_align_addr() (Niklas Cassel) - Use dw_pcie_ep_align_addr() in dw_pcie_ep_raise_msi_irq() and dw_pcie_ep_raise_msix_irq() instead of open coding the equivalent (Niklas Cassel) - Remove superfluous 'return' from pci_epf_test_clean_dma_chan() (Wang Jiang) - Avoid NULL dereference if Modem Host Interface Endpoint lacks 'mmio' DT property (Zhongqiu Han) - Release PCI domain ID of Endpoint controller parent (not controller itself) and before unregistering the controller, to avoid use-after-free (Zijun Hu) - Clear secondary (not primary) EPC in pci_epc_remove_epf() when removing the secondary controller associated with an NTB (Zijun Hu) - Fix pci_epc_map map_size kerneldoc (Rick Wertenbroek) * pci/endpoint: PCI: endpoint: Fix pci_epc_map map_size kerneldoc string PCI: endpoint: Clear secondary (not primary) EPC in pci_epc_remove_epf() PCI: endpoint: Fix PCI domain ID release in pci_epc_destroy() PCI: endpoint: epf-mhi: Avoid NULL dereference if DT lacks 'mmio' PCI: endpoint: Remove surplus return statement from pci_epf_test_clean_dma_chan() PCI: dwc: ep: Use align addr function for dw_pcie_ep_raise_{msi,msix}_irq() PCI: endpoint: test: Synchronously cancel command handler work PCI: dwc: endpoint: Implement the pci_epc_ops::align_addr() operation PCI: endpoint: test: Use pci_epc_mem_map/unmap() PCI: endpoint: Update documentation PCI: endpoint: Introduce pci_epc_mem_map()/unmap() PCI: endpoint: Improve pci_epc_mem_alloc_addr() PCI: endpoint: Introduce pci_epc_function_is_valid()

Merge branch 'pci/tph'

2024-11-25T19:40:55Z

- Add and document TLP Processing Hints (TPH) support so drivers can enable and disable TPH and the kernel can save/restore TPH configuration (Wei Huang) - Add TPH Steering Tag support so drivers can retrieve Steering Tag values associated with specific CPUs via an ACPI _DSM to direct DMA writes closer to their consumers (Wei Huang) * pci/tph: PCI/TPH: Add TPH documentation PCI/TPH: Add Steering Tag support PCI: Add TLP Processing Hints (TPH) support

PCI: Protect Link Control 2 Register with RMW locking

2024-10-23T21:50:02Z

The PCIe Bandwidth Controller performs RMW accesses the Link Control 2 Register which can occur concurrently to other sources of Link Control 2 Register writes. Therefore, add Link Control 2 Register among the PCI Express Capability Registers that need RMW locking. Link: https://lore.kernel.org/r/20241018144755.7875-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen Signed-off-by: Bjorn Helgaas Reviewed-by: Lukas Wunner Reviewed-by: Jonathan Cameron

Documentation PCI: Reformat RMW ops documentation

2024-10-23T21:49:46Z

Extract the list of RMW protected PCIe Capability registers into a bullet list to make them easier to pick up on a glance. An upcoming change is going to add one more register among them so it will be much cleaner to have them as bullets. Link: https://lore.kernel.org/r/20241018144755.7875-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen Signed-off-by: Bjorn Helgaas Reviewed-by: Lukas Wunner Reviewed-by: Jonathan Cameron

PCI/TPH: Add TPH documentation

2024-10-21T21:19:32Z

Add a document for the TPH feature, including description of "notph" kernel parameter and the API interface. Co-developed-by: Eric Van Tassell Link: https://lore.kernel.org/r/20241002165954.128085-4-wei.huang2@amd.com Signed-off-by: Eric Van Tassell Signed-off-by: Wei Huang Signed-off-by: Bjorn Helgaas Reviewed-by: Ajit Khaparde Reviewed-by: Somnath Kotur Reviewed-by: Andy Gospodarek

PCI: endpoint: Update documentation

2024-10-16T16:55:34Z

Document the new functions pci_epc_mem_map() and pci_epc_mem_unmap(). Also add the documentation for the functions pci_epc_map_addr() and pci_epc_unmap_addr() that were missing. Signed-off-by: Damien Le Moal Reviewed-by: Niklas Cassel Reviewed-by: Manivannan Sadhasivam Link: https://lore.kernel.org/r/20241012113246.95634-5-dlemoal@kernel.org Signed-off-by: Manivannan Sadhasivam

Documentation: PCI: fix typo in pci.rst

2024-09-10T21:30:42Z

Fix typo: "follow" -> "following" in pci.rst Signed-off-by: Abdul Rahim Signed-off-by: Jonathan Corbet Message-ID: <20240906205656.8261-1-abdul.rahim@myyahoo.com>

Merge branch 'pci/misc'

2024-07-19T15:10:33Z

- 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'

Documentation: PCI: pci-endpoint: Fix EPF ops list

2024-07-09T22:59:02Z

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 Signed-off-by: Krzysztof Wilczyński Signed-off-by: Bjorn Helgaas Reviewed-by: Niklas Cassel Reviewed-by: Manivannan Sadhasivam

PCI: Use array for .id_table consistently

2024-06-07T19:46:12Z

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 Signed-off-by: Bjorn Helgaas