Merge tag 'pci-v6.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:

   - Allow built-in drivers, not just modular drivers, to use async
     initial probing (Lukas Wunner)

   - Support Immediate Readiness even on devices with no PM Capability
     (Sean Christopherson)

   - Consolidate definition of PCIE_RESET_CONFIG_WAIT_MS (100ms), the
     required delay between a reset and sending config requests to a
     device (Niklas Cassel)

   - Add pci_is_display() to check for "Display" base class and use it
     in ALSA hda, vfio, vga_switcheroo, vt-d (Mario Limonciello)

   - Allow 'isolated PCI functions' (multi-function devices without a
     function 0) for LoongArch, similar to s390 and jailhouse (Huacai
     Chen)

  Power control:

   - Add ability to enable optional slot clock for cases where the PCIe
     host controller and the slot are supplied by different clocks
     (Marek Vasut)

  PCIe native device hotplug:

   - Fix runtime PM ref imbalance on Hot-Plug Capable ports caused by
     misinterpreting a config read failure after a device has been
     removed (Lukas Wunner)

   - Avoid creating a useless PCIe port service device for pciehp if the
     slot is handled by the ACPI hotplug driver (Lukas Wunner)

   - Ignore ACPI hotplug slots when calculating depth of pciehp hotplug
     ports (Lukas Wunner)

  Virtualization:

   - Save VF resizable BAR state and restore it after reset (Michał
     Winiarski)

   - Allow IOV resources (VF BARs) to be resized (Michał Winiarski)

   - Add pci_iov_vf_bar_set_size() so drivers can control VF BAR size
     (Michał Winiarski)

  Endpoint framework:

   - Add RC-to-EP doorbell support using platform MSI controller,
     including a test case (Frank Li)

   - Allow BAR assignment via configfs so platforms have flexibility in
     determining BAR usage (Jerome Brunet)

  Native PCIe controller drivers:

   - Convert amazon,al-alpine-v[23]-pcie, apm,xgene-pcie,
     axis,artpec6-pcie, marvell,armada-3700-pcie, st,spear1340-pcie to
     DT schema format (Rob Herring)

   - Use dev_fwnode() instead of of_fwnode_handle() to remove OF
     dependency in altera (fixes an unused variable), designware-host,
     mediatek, mediatek-gen3, mobiveil, plda, xilinx, xilinx-dma,
     xilinx-nwl (Jiri Slaby, Arnd Bergmann)

   - Convert aardvark, altera, brcmstb, designware-host, iproc,
     mediatek, mediatek-gen3, mobiveil, plda, rcar-host, vmd, xilinx,
     xilinx-dma, xilinx-nwl from using pci_msi_create_irq_domain() to
     using msi_create_parent_irq_domain() instead; this makes the
     interrupt controller per-PCI device, allows dynamic allocation of
     vectors after initialization, and allows support of IMS (Nam Cao)

  APM X-Gene PCIe controller driver:

   - Rewrite MSI handling to MSI CPU affinity, drop useless CPU hotplug
     bits, use device-managed memory allocations, and clean things up
     (Marc Zyngier)

   - Probe xgene-msi as a standard platform driver rather than a
     subsys_initcall (Marc Zyngier)

  Broadcom STB PCIe controller driver:

   - Add optional DT 'num-lanes' property and if present, use it to
     override the Maximum Link Width advertised in Link Capabilities
     (Jim Quinlan)

  Cadence PCIe controller driver:

   - Use PCIe Message routing types from the PCI core rather than
     defining private ones (Hans Zhang)

  Freescale i.MX6 PCIe controller driver:

   - Add IMX8MQ_EP third 64-bit BAR in epc_features (Richard Zhu)

   - Add IMX8MM_EP and IMX8MP_EP fixed 256-byte BAR 4 in epc_features
     (Richard Zhu)

   - Configure LUT for MSI/IOMMU in Endpoint mode so Root Complex can
     trigger doorbel on Endpoint (Frank Li)

   - Remove apps_reset (LTSSM_EN) from
     imx_pcie_{assert,deassert}_core_reset(), which fixes a hotplug
     regression on i.MX8MM (Richard Zhu)

   - Delay Endpoint link start until configfs 'start' written (Richard
     Zhu)

  Intel VMD host bridge driver:

   - Add Intel Panther Lake (PTL)-H/P/U Vendor ID (George D Sworo)

  Qualcomm PCIe controller driver:

   - Add DT binding and driver support for SA8255p, which supports ECAM
     for Configuration Space access (Mayank Rana)

   - Update DT binding and driver to describe PHYs and per-Root Port
     resets in a Root Port stanza and deprecate describing them in the
     host bridge; this makes it possible to support multiple Root Ports
     in the future (Krishna Chaitanya Chundru)

   - Add Qualcomm QCS615 to SM8150 DT binding (Ziyue Zhang)

   - Add Qualcomm QCS8300 to SA8775p DT binding (Ziyue Zhang)

   - Drop TBU and ref clocks from Qualcomm SM8150 and SC8180x DT
     bindings (Konrad Dybcio)

   - Document 'link_down' reset in Qualcomm SA8775P DT binding (Ziyue
     Zhang)

   - Add required PCIE_RESET_CONFIG_WAIT_MS delay after Link up IRQ
     (Niklas Cassel)

  Rockchip PCIe controller driver:

   - Drop unused PCIe Message routing and code definitions (Hans Zhang)

   - Remove several unused header includes (Hans Zhang)

   - Use standard PCIe config register definitions instead of
     rockchip-specific redefinitions (Geraldo Nascimento)

   - Set Target Link Speed to 5.0 GT/s before retraining so we have a
     chance to train at a higher speed (Geraldo Nascimento)

  Rockchip DesignWare PCIe controller driver:

   - Prevent race between link training and register update via DBI by
     inhibiting link training after hot reset and link down (Wilfred
     Mallawa)

   - Add required PCIE_RESET_CONFIG_WAIT_MS delay after Link up IRQ
     (Niklas Cassel)

  Sophgo PCIe controller driver:

   - Add DT binding and driver for Sophgo SG2044 PCIe controller driver
     in Root Complex mode (Inochi Amaoto)

  Synopsys DesignWare PCIe controller driver:

   - Add required PCIE_RESET_CONFIG_WAIT_MS after waiting for Link up on
     Ports that support > 5.0 GT/s. Slower Ports still rely on the
     not-quite-correct PCIE_LINK_WAIT_SLEEP_MS 90ms default delay while
     waiting for the Link (Niklas Cassel)"

* tag 'pci-v6.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (116 commits)
  dt-bindings: PCI: qcom,pcie-sa8775p: Document 'link_down' reset
  dt-bindings: PCI: Remove 83xx-512x-pci.txt
  dt-bindings: PCI: Convert amazon,al-alpine-v[23]-pcie to DT schema
  dt-bindings: PCI: Convert marvell,armada-3700-pcie to DT schema
  dt-bindings: PCI: Convert apm,xgene-pcie to DT schema
  dt-bindings: PCI: Convert axis,artpec6-pcie to DT schema
  dt-bindings: PCI: Convert st,spear1340-pcie to DT schema
  PCI: Move is_pciehp check out of pciehp_is_native()
  PCI: pciehp: Use is_pciehp instead of is_hotplug_bridge
  PCI/portdrv: Use is_pciehp instead of is_hotplug_bridge
  PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable ports
  selftests: pci_endpoint: Add doorbell test case
  misc: pci_endpoint_test: Add doorbell test case
  PCI: endpoint: pci-epf-test: Add doorbell test support
  PCI: endpoint: Add pci_epf_align_inbound_addr() helper for inbound address alignment
  PCI: endpoint: pci-ep-msi: Add checks for MSI parent and mutability
  PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller
  PCI: dwc: Add Sophgo SG2044 PCIe controller driver in Root Complex mode
  PCI: vmd: Switch to msi_create_parent_irq_domain()
  PCI: vmd: Convert to lock guards
  ...

Author: torvalds

Documentation/PCI/endpoint/pci-test-howto.rst

@@ -203,3 +203,18 @@ controllers, it is advisable to skip this testcase using this
 command::
 
 	# pci_endpoint_test -f pci_ep_bar -f pci_ep_basic -v memcpy -T COPY_TEST -v dma
+
+Kselftest EP Doorbell
+~~~~~~~~~~~~~~~~~~~~~
+
+If the Endpoint MSI controller is used for the doorbell usecase, run below
+command for testing it:
+
+	# pci_endpoint_test -f pcie_ep_doorbell
+
+	# Starting 1 tests from 1 test cases.
+	#  RUN           pcie_ep_doorbell.DOORBELL_TEST ...
+	#            OK  pcie_ep_doorbell.DOORBELL_TEST
+	ok 1 pcie_ep_doorbell.DOORBELL_TEST
+	# PASSED: 1 / 1 tests passed.
+	# Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0

Documentation/devicetree/bindings/pci/83xx-512x-pci.txt

@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/amazon,al-alpine-v3-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amazon Annapurna Labs Alpine v3 PCIe Host Bridge
+
+maintainers:
+  - Jonathan Chocron <jonnyc@amazon.com>
+
+description:
+  Amazon's Annapurna Labs PCIe Host Controller is based on the Synopsys
+  DesignWare PCI controller.
+
+allOf:
+  - $ref: snps,dw-pcie.yaml#
+
+properties:
+  compatible:
+    enum:
+      - amazon,al-alpine-v2-pcie
+      - amazon,al-alpine-v3-pcie
+
+  reg:
+    items:
+      - description: PCIe ECAM space
+      - description: AL proprietary registers
+      - description: Designware PCIe registers
+
+  reg-names:
+    items:
+      - const: config
+      - const: controller
+      - const: dbi
+
+  interrupts:
+    maxItems: 1
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - reg-names
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie@fb600000 {
+            compatible = "amazon,al-alpine-v3-pcie";
+            reg = <0x0 0xfb600000 0x0 0x00100000
+                  0x0 0xfd800000 0x0 0x00010000
+                  0x0 0xfd810000 0x0 0x00001000>;
+            reg-names = "config", "controller", "dbi";
+            bus-range = <0 255>;
+            device_type = "pci";
+            #address-cells = <3>;
+            #size-cells = <2>;
+            #interrupt-cells = <1>;
+            interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-map-mask = <0x00 0 0 7>;
+            interrupt-map = <0x0000 0 0 1 &gic GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>; /* INTa */
+            ranges = <0x02000000 0x0 0xc0010000 0x0 0xc0010000 0x0 0x07ff0000>;
+        };
+    };

Documentation/devicetree/bindings/pci/aardvark-pci.txt

@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/apm,xgene-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AppliedMicro X-Gene PCIe interface
+
+maintainers:
+  - Toan Le <toan@os.amperecomputing.com>
+
+allOf:
+  - $ref: /schemas/pci/pci-host-bridge.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: apm,xgene-storm-pcie
+          - const: apm,xgene-pcie
+      - items:
+          - const: apm,xgene-pcie
+
+  reg:
+    items:
+      - description: Controller configuration registers
+      - description: PCI configuration space registers
+
+  reg-names:
+    items:
+      - const: csr
+      - const: cfg
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: pcie
+
+  dma-coherent: true
+
+  msi-parent:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - '#interrupt-cells'
+  - interrupt-map-mask
+  - interrupt-map
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie@1f2b0000 {
+            compatible = "apm,xgene-storm-pcie", "apm,xgene-pcie";
+            device_type = "pci";
+            #interrupt-cells = <1>;
+            #size-cells = <2>;
+            #address-cells = <3>;
+            reg = <0x00 0x1f2b0000 0x0 0x00010000>, /* Controller registers */
+                  <0xe0 0xd0000000 0x0 0x00040000>; /* PCI config space */
+            reg-names = "csr", "cfg";
+            ranges = <0x01000000 0x00 0x00000000 0xe0 0x10000000 0x00 0x00010000>, /* io */
+                    <0x02000000 0x00 0x80000000 0xe1 0x80000000 0x00 0x80000000>; /* mem */
+            dma-ranges = <0x42000000 0x80 0x00000000 0x80 0x00000000 0x00 0x80000000>,
+                        <0x42000000 0x00 0x00000000 0x00 0x00000000 0x80 0x00000000>;
+            interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+            interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0xc2 0x1>,
+                            <0x0 0x0 0x0 0x2 &gic 0x0 0xc3 0x1>,
+                            <0x0 0x0 0x0 0x3 &gic 0x0 0xc4 0x1>,
+                            <0x0 0x0 0x0 0x4 &gic 0x0 0xc5 0x1>;
+            dma-coherent;
+            clocks = <&pcie0clk 0>;
+        };
+    };