Changes in debugfs-dwc-pcie

bbfd5594756011167b8f8de9a00e0c946afda1e6 - Merge drm/drm-next into drm-intel-gt-next

Wed, 28 May 2025 09:20:17 +0200

Merge drm/drm-next into drm-intel-gt-nextNeed to pull in a67221b5eb8d ("drm/i915/dp: Return min bpc supported by source instead of 0")in order to fix build breakage on GCC 9.4.0 (from Ubuntu 20.04).Signed-off-by: Joonas Lahtinen List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

db5302ae571beec635c1a96e7f72926a4e65195e - Merge drm/drm-next into drm-intel-next

Fri, 16 May 2025 09:22:36 +0200

Merge drm/drm-next into drm-intel-nextBackmerge to sync with v6.15-rc, xe, and specifically async flip changesin drm-misc.Signed-off-by: Jani Nikula List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

4f9786035f9e519db41375818e1d0b5f20da2f10 - Merge branch 'next' into for-linus

Mon, 02 Jun 2025 06:41:07 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.16 merge window. List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

d51b9d81f7883f526b26e3ab903e646274aebeb1 - Merge tag 'v6.15-rc6' into next

Fri, 16 May 2025 01:20:39 +0200

Merge tag 'v6.15-rc6' into nextSync up with mainline to bring in xpad controller changes. List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

844e31bbaef7c8a6ff2c0fbac45c0c85b5484482 - Merge remote-tracking branch 'drm-misc/drm-misc-next' into msm-next

Tue, 29 Apr 2025 22:42:29 +0200

Merge remote-tracking branch 'drm-misc/drm-misc-next' into msm-nextMerge drm-misc-next to get commit Fixes: fec450ca15af ("drm/display:hdmi: provide central data authority for ACR params").Signed-off-by: Rob Clark List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

3ab7ae8e07f888f223027f0ef84d33e43919ad55 - Merge drm/drm-next into drm-xe-next

Thu, 24 Apr 2025 13:34:55 +0200

Merge drm/drm-next into drm-xe-nextBackmerge to bring in linux 6.15-rc.Signed-off-by: Thomas Hellström List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

1afba39f9305fe4061a4e70baa6ebab9d41459da - Merge drm/drm-next into drm-misc-next

Mon, 07 Apr 2025 13:47:40 +0200

Merge drm/drm-next into drm-misc-nextBackmerging to get v6.15-rc1 into drm-misc-next. Also fixes abuild issue when enabling CONFIG_DRM_SCHED_KUNIT_TEST.Signed-off-by: Thomas Zimmermann List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

9f13acb2406a3aed90c6738b3a2f1c0e43118cbd - Merge tag 'v6.15-rc1' into x86/cpu, to refresh the branch with upstream changes

Fri, 11 Apr 2025 11:13:27 +0200

Merge tag 'v6.15-rc1' into x86/cpu, to refresh the branch with upstream changesSigned-off-by: Ingo Molnar List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

6ce0fdaae043803bb324d915ce0fe43316bf1e81 - Merge tag 'v6.15-rc1' into x86/asm, to refresh the branch

Wed, 09 Apr 2025 21:39:43 +0200

Merge tag 'v6.15-rc1' into x86/asm, to refresh the branchSigned-off-by: Ingo Molnar List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

1260ed77798502de9c98020040d2995008de10cc - Merge drm/drm-fixes into drm-misc-fixes

Tue, 08 Apr 2025 10:15:47 +0200

Merge drm/drm-fixes into drm-misc-fixesBackmerging to get updates from v6.15-rc1.Signed-off-by: Thomas Zimmermann List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

7d06015d936c861160803e020f68f413b5c3cd9d - Merge tag 'pci-v6.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Sat, 29 Mar 2025 03:36:53 +0100

Merge tag 'pci-v6.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pciPull pci updates from Bjorn Helgaas: "Enumeration: - Enable Configuration RRS SV, which makes device readiness visible, early instead of during child bus scanning (Bjorn Helgaas) - Log debug messages about reset methods being used (Bjorn Helgaas) - Avoid reset when it has been disabled via sysfs (Nishanth Aravamudan) - Add common pci-ep-bus.yaml schema for exporting several peripherals of a single PCI function via devicetree (Andrea della Porta) - Create DT nodes for PCI host bridges to enable loading device tree overlays to create platform devices for PCI devices that have several features that require multiple drivers (Herve Codina) Resource management: - Enlarge devres table[] to accommodate bridge windows, ROM, IOV BARs, etc., and validate BAR index in devres interfaces (Philipp Stanner) - Fix typo that repeatedly distributed resources to a bridge instead of iterating over subordinate bridges, which resulted in too little space to assign some BARs (Kai-Heng Feng) - Relax bridge window tail sizing for optional resources, e.g., IOV BARs, to avoid failures when removing and re-adding devices (Ilpo Järvinen) - Allow drivers to enable devices even if we haven't assigned optional IOV resources to them (Ilpo Järvinen) - Rework handling of optional resources (IOV BARs, ROMs) to reduce failures if we can't allocate them (Ilpo Järvinen) - Fix a NULL dereference in the SR-IOV VF creation error path (Shay Drory) - Fix s390 mmio_read/write syscalls, which didn't cause page faults in some cases, which broke vfio-pci lazy mapping on first access (Niklas Schnelle) - Add pdev->non_mappable_bars to replace CONFIG_VFIO_PCI_MMAP, which was disabled only for s390 (Niklas Schnelle) - Support mmap of PCI resources on s390 except for ISM devices (Niklas Schnelle) ASPM: - Delay pcie_link_state deallocation to avoid dangling pointers that cause invalid references during hot-unplug (Daniel Stodden) Power management: - Allow PCI bridges to go to D3Hot when suspending on all non-x86 systems (Manivannan Sadhasivam) Power control: - Create pwrctrl devices in pci_scan_device() to make it more symmetric with pci_pwrctrl_unregister() and make pwrctrl devices for PCI bridges possible (Manivannan Sadhasivam) - Unregister pwrctrl devices in pci_destroy_dev() so DOE, ASPM, etc. can still access devices after pci_stop_dev() (Manivannan Sadhasivam) - If there's a pwrctrl device for a PCI device, skip scanning it because the pwrctrl core will rescan the bus after the device is powered on (Manivannan Sadhasivam) - Add a pwrctrl driver for PCI slots based on voltage regulators described via devicetree (Manivannan Sadhasivam) Bandwidth control: - Add set_pcie_speed.sh to TEST_PROGS to fix issue when executing the set_pcie_cooling_state.sh test case (Yi Lai) - Avoid a NULL pointer dereference when we run out of bus numbers to assign for a bridge secondary bus (Lukas Wunner) Hotplug: - Drop superfluous pci_hotplug_slot_list, try_module_get() calls, and NULL pointer checks (Lukas Wunner) - Drop shpchp module init/exit logging, replace shpchp dbg() with ctrl_dbg(), and remove unused dbg(), err(), info(), warn() wrappers (Ilpo Järvinen) - Drop 'shpchp_debug' module parameter in favor of standard dynamic debugging (Ilpo Järvinen) - Drop unused cpcihp .get_power(), .set_power() function pointers (Guilherme Giacomo Simoes) - Disable hotplug interrupts in portdrv only when pciehp is not enabled to avoid issuing two hotplug commands too close together (Feng Tang) - Skip pciehp 'device replaced' check if the device has been removed to address a deadlock when resuming after a device was removed during system sleep (Lukas Wunner) - Don't enable pciehp hotplug interupt when resuming in poll mode (Ilpo Järvinen) Virtualization: - Fix bugs in 'pci=config_acs=' kernel command line parameter (Tushar Dave) DOE: - Expose supported DOE features via sysfs (Alistair Francis) - Allow DOE support to be enabled even if CXL isn't enabled (Alistair Francis) Endpoint framework: - Convert PCI device data so pci-epf-test works correctly on big-endian endpoint systems (Niklas Cassel) - Add BAR_RESIZABLE type to endpoint framework and add DWC core support for EPF drivers to set BAR_RESIZABLE type and size (Niklas Cassel) - Fix pci-epf-test double free that causes an oops if the host reboots and PERST# deassertion restarts endpoint BAR allocation (Christian Bruel) - Fix endpoint BAR testing so tests can skip disabled BARs instead of reporting them as failures (Niklas Cassel) - Widen endpoint test BAR size variable to accommodate BARs larger than INT_MAX (Niklas Cassel) - Remove unused tools 'pci' build target left over after moving tests to tools/testing/selftests/pci_endpoint (Jianfeng Liu) Altera PCIe controller driver: - Add DT binding and driver support for Agilex family (P-Tile, F-Tile, R-Tile) (Matthew Gerlach and D M, Sharath Kumar) AMD MDB PCIe controller driver: - Add DT binding and driver for AMD MDB (Multimedia DMA Bridge) (Thippeswamy Havalige) Broadcom STB PCIe controller driver: - Add BCM2712 MSI-X DT binding and interrupt controller drivers and add softdep on irq_bcm2712_mip driver to ensure that it is loaded first (Stanimir Varbanov) - Expand inbound window map to 64GB so it can accommodate BCM2712 (Stanimir Varbanov) - Add BCM2712 support and DT updates (Stanimir Varbanov) - Apply link speed restriction before bringing link up, not after (Jim Quinlan) - Update Max Link Speed in Link Capabilities via the internal writable register, not the read-only config register (Jim Quinlan) - Handle regulator_bulk_get() error to avoid panic when we call regulator_bulk_free() later (Jim Quinlan) - Disable regulators only when removing the bus immediately below a Root Port because we don't support regulators deeper in the hierarchy (Jim Quinlan) - Make const read-only arrays static (Colin Ian King) Cadence PCIe endpoint driver: - Correct MSG TLP generation so endpoints can generate INTx messages (Hans Zhang) Freescale i.MX6 PCIe controller driver: - Identify the second controller on i.MX8MQ based on devicetree 'linux,pci-domain' instead of DBI 'reg' address (Richard Zhu) - Remove imx_pcie_cpu_addr_fixup() since dwc core can now derive the ATU input address (using parent_bus_offset) from devicetree (Frank Li) Freescale Layerscape PCIe controller driver: - Drop deprecated 'num-ib-windows' and 'num-ob-windows' and unnecessary 'status' from example (Krzysztof Kozlowski) - Correct the syscon_regmap_lookup_by_phandle_args("fsl,pcie-scfg") arg_count to fix probe failure on LS1043A (Ioana Ciornei) HiSilicon STB PCIe controller driver: - Call phy_exit() to clean up if histb_pcie_probe() fails (Christophe JAILLET) Intel Gateway PCIe controller driver: - Remove intel_pcie_cpu_addr() since dwc core can now derive the ATU input address (using parent_bus_offset) from devicetree (Frank Li) Intel VMD host bridge driver: - Convert vmd_dev.cfg_lock from spinlock_t to raw_spinlock_t so pci_ops.read() will never sleep, even on PREEMPT_RT where spinlock_t becomes a sleepable lock, to avoid calling a sleeping function from invalid context (Ryo Takakura) MediaTek PCIe Gen3 controller driver: - Remove leftover mac_reset assert for Airoha EN7581 SoC (Lorenzo Bianconi) - Add EN7581 PBUS controller 'mediatek,pbus-csr' DT property and program host bridge memory aperture to this syscon node (Lorenzo Bianconi) Qualcomm PCIe controller driver: - Add qcom,pcie-ipq5332 binding (Varadarajan Narayanan) - Add qcom i.MX8QM and i.MX8QXP/DXP optional DMA interrupt (Alexander Stein) - Add optional dma-coherent DT property for Qualcomm SA8775P (Dmitry Baryshkov) - Make DT iommu property required for SA8775P and prohibited for SDX55 (Dmitry Baryshkov) - Add DT IOMMU and DMA-related properties for Qualcomm SM8450 (Dmitry Baryshkov) - Add endpoint DT properties for SAR2130P and enable endpoint mode in driver (Dmitry Baryshkov) - Describe endpoint BAR0 and BAR2 as 64-bit only and BAR1 and BAR3 as RESERVED (Manivannan Sadhasivam) Rockchip DesignWare PCIe controller driver: - Describe rk3568 and rk3588 BARs as Resizable, not Fixed (Niklas Cassel) Synopsys DesignWare PCIe controller driver: - Add debugfs-based Silicon Debug, Error Injection, Statistical Counter support for DWC (Shradha Todi) - Add debugfs property to expose LTSSM status of DWC PCIe link (Hans Zhang) - Add Rockchip support for DWC debugfs features (Niklas Cassel) - Add dw_pcie_parent_bus_offset() to look up the parent bus address of a specified 'reg' property and return the offset from the CPU physical address (Frank Li) - Use dw_pcie_parent_bus_offset() to derive CPU -> ATU addr offset via 'reg[config]' for host controllers and 'reg[addr_space]' for endpoint controllers (Frank Li) - Apply struct dw_pcie.parent_bus_offset in ATU users to remove use of .cpu_addr_fixup() when programming ATU (Frank Li) TI J721E PCIe driver: - Correct the 'link down' interrupt bit for J784S4 (Siddharth Vadapalli) TI Keystone PCIe controller driver: - Describe AM65x BARs 2 and 5 as Resizable (not Fixed) and reduce alignment requirement from 1MB to 64KB (Niklas Cassel) Xilinx Versal CPM PCIe controller driver: - Free IRQ domain in probe error path to avoid leaking it (Thippeswamy Havalige) - Add DT .compatible "xlnx,versal-cpm5nc-host" and driver support for Versal Net CPM5NC Root Port controller (Thippeswamy Havalige) - Add driver support for CPM5_HOST1 (Thippeswamy Havalige) Miscellaneous: - Convert fsl,mpc83xx-pcie binding to YAML (J. Neuschäfer) - Use for_each_available_child_of_node_scoped() to simplify apple, kirin, mediatek, mt7621, tegra drivers (Zhang Zekun)"* tag 'pci-v6.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (197 commits) PCI: layerscape: Fix arg_count to syscon_regmap_lookup_by_phandle_args() PCI: j721e: Fix the value of .linkdown_irq_regfield for J784S4 misc: pci_endpoint_test: Add support for PCITEST_IRQ_TYPE_AUTO PCI: endpoint: pci-epf-test: Expose supported IRQ types in CAPS register PCI: dw-rockchip: Endpoint mode cannot raise INTx interrupts PCI: endpoint: Add intx_capable to epc_features struct dt-bindings: PCI: Add common schema for devices accessible through PCI BARs PCI: intel-gw: Remove intel_pcie_cpu_addr() PCI: imx6: Remove imx_pcie_cpu_addr_fixup() PCI: dwc: Use parent_bus_offset to remove need for .cpu_addr_fixup() PCI: dwc: ep: Ensure proper iteration over outbound map windows PCI: dwc: ep: Use devicetree 'reg[addr_space]' to derive CPU -> ATU addr offset PCI: dwc: ep: Consolidate devicetree handling in dw_pcie_ep_get_resources() PCI: dwc: ep: Call epc_create() early in dw_pcie_ep_init() PCI: dwc: Use devicetree 'reg[config]' to derive CPU -> ATU addr offset PCI: dwc: Add dw_pcie_parent_bus_offset() checking and debug PCI: dwc: Add dw_pcie_parent_bus_offset() PCI/bwctrl: Fix NULL pointer dereference on bus number exhaustion PCI: xilinx-cpm: Add cpm_csr register mapping for CPM5_HOST1 variant PCI: brcmstb: Make const read-only arrays static ... List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

ba4751ae1a7624edddc302d9a323d520ec5b72b2 - Merge branch 'pci/controller/dwc'

Thu, 27 Mar 2025 19:14:49 +0100

Merge branch 'pci/controller/dwc'- Move struct dwc_pcie_vsec_id to include/linux/pcie-dwc.h, where it can be shared by debugfs, perf, sysfs, etc (Manivannan Sadhasivam)- Add dw_pcie_find_vsec_capability() to locate Vendor Specific Extended Capabilities (Shradha Todi)- Add debugfs-based Silicon Debug, Error Injection, Statistical Counter support for DWC (Shradha Todi)- Add debugfs property to expose LTSSM status of DWC PCIe link (Hans Zhang)- Add Rockchip Vendor ID and Vendor Specific ID of RAS DES Capability so the DWC debugfs features work for Rockchip as well (Niklas Cassel)* pci/controller/dwc: PCI: dw-rockchip: Hide broken ATS capability for RK3588 running in EP mode PCI: dwc: ep: Add dw_pcie_ep_hide_ext_capability() PCI: dwc: ep: Return -ENOMEM for allocation failures PCI: dwc: Add Rockchip to the RAS DES allowed vendor list PCI: Add Rockchip Vendor ID PCI: dwc: Add debugfs property to provide LTSSM status of the PCIe link PCI: dwc: Add debugfs based Statistical Counter support for DWC PCI: dwc: Add debugfs based Error Injection support for DWC PCI: dwc: Add debugfs based Silicon Debug support for DWC PCI: dwc: Add helper to find the Vendor Specific Extended Capability (VSEC) perf/dwc_pcie: Move common DWC struct definitions to 'pcie-dwc.h' List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

f0f3044d2246495e01871212fc7ec5e206555338 - PCI: dwc: Add debugfs property to provide LTSSM status of the PCIe link

Sun, 23 Feb 2025 15:18:48 +0100

PCI: dwc: Add debugfs property to provide LTSSM status of the PCIe linkAdd the debugfs property to provide a view of the current link's LTSSMstatus from the Root Port device.Signed-off-by: Hans Zhang <18255117159@163.com>Reviewed-by: Manivannan Sadhasivam Tested-by: Niklas Cassel Tested-by: Hrishikesh Deleep Link: https://lore.kernel.org/r/20250223141848.231232-1-18255117159@163.com[kwilczynski: commit log, refactor dw_ltssm_sts_string() to avoidcompilation errors on platforms that do not set CONFIG_PCIE_DW_HOST]Signed-off-by: Krzysztof Wilczyński List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

27491ac2ccd7e111a9c058e7654d372cbfcdad4c - PCI: dwc: Add debugfs based Statistical Counter support for DWC

Fri, 21 Feb 2025 14:15:48 +0100

PCI: dwc: Add debugfs based Statistical Counter support for DWCAdd support to provide Statistical Counter interface to userspace.This set of debug registers are part of the RAS DES feature present inDesignWare PCIe controllers.Co-developed-by: Manivannan Sadhasivam Signed-off-by: Shradha Todi Reviewed-by: Manivannan Sadhasivam Tested-by: Hrishikesh Deleep Link: https://lore.kernel.org/r/20250221131548.59616-6-shradha.t@samsung.com[kwilczynski: commit log, tidy up code comments, update documentation,squashed patch that checks if the event counter is supported fromhttps://lore.kernel.org/linux-pci/20250225171239.19574-3-manivannan.sadhasivam@linaro.org]Signed-off-by: Krzysztof Wilczyński List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

d20ee8e2dbd6c41a1e48ac38c352689b1d3cbbe4 - PCI: dwc: Add debugfs based Error Injection support for DWC

Fri, 21 Feb 2025 14:15:47 +0100

PCI: dwc: Add debugfs based Error Injection support for DWCAdd support to provide Error Injection interface to userspace.This set of debug registers are part of the RAS DES feature present inDesignWare PCIe controllers.Signed-off-by: Shradha Todi Reviewed-by: Manivannan Sadhasivam Reviewed-by: Fan Ni Tested-by: Hrishikesh Deleep Link: https://lore.kernel.org/r/20250221131548.59616-5-shradha.t@samsung.com[kwilczynski: commit log, tidy up code comments, update documentation,change debugfs property name from "duplicate_dllp" to "duplicate_tlp"]Signed-off-by: Krzysztof Wilczyński List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie

4fbfa17f9a075593281034f566ca79cbf4930c82 - PCI: dwc: Add debugfs based Silicon Debug support for DWC

Fri, 21 Feb 2025 14:15:46 +0100

PCI: dwc: Add debugfs based Silicon Debug support for DWCAdd support to provide Silicon Debug interface to userspace.This set of debug registers are part of the RAS DES feature present inDesignWare PCIe controllers.Co-developed-by: Manivannan Sadhasivam Signed-off-by: Shradha Todi Reviewed-by: Manivannan Sadhasivam Reviewed-by: Fan Ni Tested-by: Hrishikesh Deleep Link: https://lore.kernel.org/r/20250221131548.59616-4-shradha.t@samsung.com[kwilczynski: commit log, tidy up Kconfig and drop "default y", tidy upcode comments, squashed patch that fixes a NULL pointer dereference whendebugfs is already unavailable during clean-up fromhttps://lore.kernel.org/linux-pci/20250225171239.19574-2-manivannan.sadhasivam@linaro.org,refactor dwc_pcie_debugfs_init() to not return errors, squashed patch thatchanges how lack of the RAS DES capability is handled fromhttps://lore.kernel.org/linux-pci/20250304151814.6xu7cbpwpqrvcad5@thinkpad]Signed-off-by: Krzysztof Wilczyński List of files: /linux/Documentation/ABI/testing/debugfs-dwc-pcie