Merge tag 'pci-v5.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:

   - Program MPS for RCiEP devices (Ashok Raj)

   - Fix pci_register_host_bridge() device_register() error handling
     (Rob Herring)

   - Fix pci_host_bridge struct device release/free handling (Rob
     Herring)

  Resource management:

   - Allow resizing BARs for devices on root bus (Ard Biesheuvel)

  Power management:

   - Reduce Thunderbolt resume time by working around devices that don't
     support DLL Link Active reporting (Mika Westerberg)

   - Work around a Pericom USB controller OHCI/EHCI PME# defect
     (Kai-Heng Feng)

  Virtualization:

   - Add ACS quirk for Intel Root Complex Integrated Endpoints (Ashok
     Raj)

   - Avoid FLR for AMD Starship USB 3.0 (Kevin Buettner)

   - Avoid FLR for AMD Matisse HD Audio & USB 3.0 (Marcos Scriven)

  Error handling:

   - Use only _OSC (not HEST FIRMWARE_FIRST) to determine AER ownership
     (Alexandru Gagniuc, Kuppuswamy Sathyanarayanan)

   - Reduce verbosity by logging only ACPI_NOTIFY_DISCONNECT_RECOVER
     events (Kuppuswamy Sathyanarayanan)

   - Don't enable AER by default in Kconfig (Bjorn Helgaas)

  Peer-to-peer DMA:

   - Add AMD Zen Raven and Renoir Root Ports to whitelist (Alex Deucher)

  ASPM:

   - Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges (Kai-Heng Feng)

  Endpoint framework:

   - Fix DMA channel release in test (Kunihiko Hayashi)

   - Add page size as argument to pci_epc_mem_init() (Lad Prabhakar)

   - Add support to handle multiple base for mapping outbound memory
     (Lad Prabhakar)

  Generic host bridge driver:

   - Support building as module (Rob Herring)

   - Eliminate pci_host_common_probe wrappers (Rob Herring)

  Amlogic Meson PCIe controller driver:

   - Don't use FAST_LINK_MODE to set up link (Marc Zyngier)

  Broadcom STB PCIe controller driver:

   - Disable ASPM L0s if 'aspm-no-l0s' in DT (Jim Quinlan)

   - Fix clk_put() error (Jim Quinlan)

   - Fix window register offset (Jim Quinlan)

   - Assert fundamental reset on initialization (Nicolas Saenz Julienne)

   - Add notify xHCI reset property (Nicolas Saenz Julienne)

   - Add init routine for Raspberry Pi 4 VL805 USB controller (Nicolas
     Saenz Julienne)

   - Sync with Raspberry Pi 4 firmware for VL805 initialization (Nicolas
     Saenz Julienne)

  Cadence PCIe controller driver:

   - Remove "cdns,max-outbound-regions" DT property (replaced by
     "ranges") (Kishon Vijay Abraham I)

   - Read 32-bit (not 16-bit) Vendor ID/Device ID property from DT
     (Kishon Vijay Abraham I)

  Marvell Aardvark PCIe controller driver:

   - Improve link training (Marek Behún)

   - Add PHY support (Marek Behún)

   - Add "phys", "max-link-speed", "reset-gpios" to dt-binding (Marek
     Behún)

   - Train link immediately after enabling training to work around
     detection issues with some cards (Pali Rohár)

   - Issue PERST via GPIO to work around detection issues (Pali Rohár)

   - Don't blindly enable ASPM L0s (Pali Rohár)

   - Replace custom macros by standard linux/pci_regs.h macros (Pali
     Rohár)

  Microsoft Hyper-V host bridge driver:

   - Fix probe failure path to release resource (Wei Hu)

   - Retry PCI bus D0 entry on invalid device state for kdump (Wei Hu)

  Renesas R-Car PCIe controller driver:

   - Fix incorrect programming of OB windows (Andrew Murray)

   - Add suspend/resume (Kazufumi Ikeda)

   - Rename pcie-rcar.c to pcie-rcar-host.c (Lad Prabhakar)

   - Add endpoint controller driver (Lad Prabhakar)

   - Fix PCIEPAMR mask calculation (Lad Prabhakar)

   - Add r8a77961 to DT binding (Yoshihiro Shimoda)

  Socionext UniPhier Pro5 controller driver:

   - Add endpoint controller driver (Kunihiko Hayashi)

  Synopsys DesignWare PCIe controller driver:

   - Program outbound ATU upper limit register (Alan Mikhak)

   - Fix inner MSI IRQ domain registration (Marc Zyngier)

  Miscellaneous:

   - Check for platform_get_irq() failure consistently (negative return
     means failure) (Aman Sharma)

   - Fix several runtime PM get/put imbalances (Dinghao Liu)

   - Use flexible-array and struct_size() helpers for code cleanup
     (Gustavo A. R. Silva)

   - Update & fix issues in bridge emulation of PCIe registers (Jon
     Derrick)

   - Add macros for bridge window names (PCI_BRIDGE_IO_WINDOW, etc)
     (Krzysztof Wilczyński)

   - Work around Intel PCH MROMs that have invalid BARs (Xiaochun Lee)"

* tag 'pci-v5.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (100 commits)
  PCI: uniphier: Add Socionext UniPhier Pro5 PCIe endpoint controller driver
  PCI: Add ACS quirk for Intel Root Complex Integrated Endpoints
  PCI/DPC: Print IRQ number used by port
  PCI/AER: Use "aer" variable for capability offset
  PCI/AER: Remove redundant dev->aer_cap checks
  PCI/AER: Remove redundant pci_is_pcie() checks
  PCI/AER: Remove HEST/FIRMWARE_FIRST parsing for AER ownership
  PCI: tegra: Fix runtime PM imbalance on error
  PCI: vmd: Filter resource type bits from shadow register
  PCI: tegra194: Fix runtime PM imbalance on error
  dt-bindings: PCI: Add UniPhier PCIe endpoint controller description
  PCI: hv: Use struct_size() helper
  PCI: Rename _DSM constants to align with spec
  PCI: Avoid FLR for AMD Starship USB 3.0
  PCI: Avoid FLR for AMD Matisse HD Audio & USB 3.0
  x86/PCI: Drop unused xen_register_pirq() gsi_override parameter
  PCI: dwc: Use private data pointer of "struct irq_domain" to get pcie_port
  PCI: amlogic: meson: Don't use FAST_LINK_MODE to set up link
  PCI: dwc: Fix inner MSI IRQ domain registration
  PCI: dwc: pci-dra7xx: Use devm_platform_ioremap_resource_byname()
  ...

76 files changed, 3356 insertions, 1921 deletions

diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
index 6b347d9920cc..54b36b7ad47d 100644
--- a/drivers/acpi/pci_mcfg.c
+++ b/drivers/acpi/pci_mcfg.c
@@ -29,7 +29,7 @@ struct mcfg_fixup {
 	u32 oem_revision;
 	u16 segment;
 	struct resource bus_range;
-	struct pci_ecam_ops *ops;
+	const struct pci_ecam_ops *ops;
 	struct resource cfgres;
 };
 
@@ -165,7 +165,7 @@ static int pci_mcfg_quirk_matches(struct mcfg_fixup *f, u16 segment,
 
 static void pci_mcfg_apply_quirks(struct acpi_pci_root *root,
 				  struct resource *cfgres,
-				  struct pci_ecam_ops **ecam_ops)
+				  const struct pci_ecam_ops **ecam_ops)
 {
 #ifdef CONFIG_PCI_QUIRKS
 	u16 segment = root->segment;
@@ -191,9 +191,9 @@ static void pci_mcfg_apply_quirks(struct acpi_pci_root *root,
 static LIST_HEAD(pci_mcfg_list);
 
 int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres,
-		    struct pci_ecam_ops **ecam_ops)
+		    const struct pci_ecam_ops **ecam_ops)
 {
-	struct pci_ecam_ops *ops = &pci_generic_ecam_ops;
+	const struct pci_ecam_ops *ops = &pci_generic_ecam_ops;
 	struct resource *bus_res = &root->secondary;
 	u16 seg = root->segment;
 	struct mcfg_entry *e;
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index ac8ad6cb82aa..f90e841c59f5 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -483,13 +483,8 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
 	if (IS_ENABLED(CONFIG_HOTPLUG_PCI_SHPC))
 		control |= OSC_PCI_SHPC_NATIVE_HP_CONTROL;
 
-	if (pci_aer_available()) {
-		if (aer_acpi_firmware_first())
-			dev_info(&device->dev,
-				 "PCIe AER handled by firmware\n");
-		else
-			control |= OSC_PCI_EXPRESS_AER_CONTROL;
-	}
+	if (pci_aer_available())
+		control |= OSC_PCI_EXPRESS_AER_CONTROL;
 
 	/*
 	 * Per the Downstream Port Containment Related Enhancements ECN to
@@ -938,7 +933,7 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
 	 * assignments made by firmware for this host bridge.
 	 */
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_guid, 1,
-	                        IGNORE_PCI_BOOT_CONFIG_DSM, NULL);
+				DSM_PCI_PRESERVE_BOOT_CONFIG, NULL);
 	if (obj && obj->type == ACPI_TYPE_INTEGER && obj->integer.value == 0)
 		host_bridge->preserve_config = 1;
 	ACPI_FREE(obj);
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 615c6b06b427..4b49641effa1 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -153,23 +153,24 @@ EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname);
  *		if (irq < 0)
  *			return irq;
  *
- * Return: IRQ number on success, negative error number on failure.
+ * Return: non-zero IRQ number on success, negative error number on failure.
  */
 int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
 {
+	int ret;
 #ifdef CONFIG_SPARC
 	/* sparc does not have irqs represented as IORESOURCE_IRQ resources */
 	if (!dev || num >= dev->archdata.num_irqs)
 		return -ENXIO;
-	return dev->archdata.irqs[num];
+	ret = dev->archdata.irqs[num];
+	goto out;
 #else
 	struct resource *r;
-	int ret;
 
 	if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
 		ret = of_irq_get(dev->dev.of_node, num);
 		if (ret > 0 || ret == -EPROBE_DEFER)
-			return ret;
+			goto out;
 	}
 
 	r = platform_get_resource(dev, IORESOURCE_IRQ, num);
@@ -177,7 +178,7 @@ int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
 		if (r && r->flags & IORESOURCE_DISABLED) {
 			ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r);
 			if (ret)
-				return ret;
+				goto out;
 		}
 	}
 
@@ -191,13 +192,17 @@ int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
 		struct irq_data *irqd;
 
 		irqd = irq_get_irq_data(r->start);
-		if (!irqd)
-			return -ENXIO;
+		if (!irqd) {
+			ret = -ENXIO;
+			goto out;
+		}
 		irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS);
 	}
 
-	if (r)
-		return r->start;
+	if (r) {
+		ret = r->start;
+		goto out;
+	}
 
 	/*
 	 * For the index 0 interrupt, allow falling back to GpioInt
@@ -210,11 +215,14 @@ int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
 		ret = acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num);
 		/* Our callers expect -ENXIO for missing IRQs. */
 		if (ret >= 0 || ret == -EPROBE_DEFER)
-			return ret;
+			goto out;
 	}
 
-	return -ENXIO;
+	ret = -ENXIO;
 #endif
+out:
+	WARN(ret == 0, "0 is an invalid IRQ number\n");
+	return ret;
 }
 EXPORT_SYMBOL_GPL(platform_get_irq_optional);
 
@@ -233,7 +241,7 @@ EXPORT_SYMBOL_GPL(platform_get_irq_optional);
  *		if (irq < 0)
  *			return irq;
  *
- * Return: IRQ number on success, negative error number on failure.
+ * Return: non-zero IRQ number on success, negative error number on failure.
  */
 int platform_get_irq(struct platform_device *dev, unsigned int num)
 {
@@ -305,8 +313,10 @@ static int __platform_get_irq_byname(struct platform_device *dev,
 	}
 
 	r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
-	if (r)
+	if (r) {
+		WARN(r->start == 0, "0 is an invalid IRQ number\n");
 		return r->start;
+	}
 
 	return -ENXIO;
 }
@@ -318,7 +328,7 @@ static int __platform_get_irq_byname(struct platform_device *dev,
  *
  * Get an IRQ like platform_get_irq(), but then by name rather then by index.
  *
- * Return: IRQ number on success, negative error number on failure.
+ * Return: non-zero IRQ number on success, negative error number on failure.
  */
 int platform_get_irq_byname(struct platform_device *dev, const char *name)
 {
@@ -340,7 +350,7 @@ EXPORT_SYMBOL_GPL(platform_get_irq_byname);
  * Get an optional IRQ by name like platform_get_irq_byname(). Except that it
  * does not print an error message if an IRQ can not be obtained.
  *
- * Return: IRQ number on success, negative error number on failure.
+ * Return: non-zero IRQ number on success, negative error number on failure.
  */
 int platform_get_irq_byname_optional(struct platform_device *dev,
 				     const char *name)
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 4843e94713a4..fbd785dd0513 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -178,8 +178,9 @@ config ISCSI_IBFT
 	  Otherwise, say N.
 
 config RASPBERRYPI_FIRMWARE
-	tristate "Raspberry Pi Firmware Driver"
+	bool "Raspberry Pi Firmware Driver"
 	depends on BCM2835_MBOX
+	default USB_PCI
 	help
 	  This option enables support for communicating with the firmware on the
 	  Raspberry Pi.
diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index a3e85186f8e6..ef8098856a47 100644
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -12,6 +12,8 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
 #include <soc/bcm2835/raspberrypi-firmware.h>
 
 #define MBOX_MSG(chan, data28)		(((data28) & ~0xf) | ((chan) & 0xf))
@@ -19,6 +21,8 @@
 #define MBOX_DATA28(msg)		((msg) & ~0xf)
 #define MBOX_CHAN_PROPERTY		8
 
+#define VL805_PCI_CONFIG_VERSION_OFFSET		0x50
+
 static struct platform_device *rpi_hwmon;
 static struct platform_device *rpi_clk;
 
@@ -280,6 +284,63 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
 }
 EXPORT_SYMBOL_GPL(rpi_firmware_get);
 
+/*
+ * The Raspberry Pi 4 gets its USB functionality from VL805, a PCIe chip that
+ * implements xHCI. After a PCI reset, VL805's firmware may either be loaded
+ * directly from an EEPROM or, if not present, by the SoC's co-processor,
+ * VideoCore. RPi4's VideoCore OS contains both the non public firmware load
+ * logic and the VL805 firmware blob. This function triggers the aforementioned
+ * process.
+ */
+int rpi_firmware_init_vl805(struct pci_dev *pdev)
+{
+	struct device_node *fw_np;
+	struct rpi_firmware *fw;
+	u32 dev_addr, version;
+	int ret;
+
+	fw_np = of_find_compatible_node(NULL, NULL,
+					"raspberrypi,bcm2835-firmware");
+	if (!fw_np)
+		return 0;
+
+	fw = rpi_firmware_get(fw_np);
+	of_node_put(fw_np);
+	if (!fw)
+		return -ENODEV;
+
+	/*
+	 * Make sure we don't trigger a firmware load unnecessarily.
+	 *
+	 * If something went wrong with PCI, this whole exercise would be
+	 * futile as VideoCore expects from us a configured PCI bus. Just take
+	 * the faulty version (likely ~0) and let xHCI's registration fail
+	 * further down the line.
+	 */
+	pci_read_config_dword(pdev, VL805_PCI_CONFIG_VERSION_OFFSET, &version);
+	if (version)
+		goto exit;
+
+	dev_addr = pdev->bus->number << 20 | PCI_SLOT(pdev->devfn) << 15 |
+		   PCI_FUNC(pdev->devfn) << 12;
+
+	ret = rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_XHCI_RESET,
+				    &dev_addr, sizeof(dev_addr));
+	if (ret)
+		return ret;
+
+	/* Wait for vl805 to startup */
+	usleep_range(200, 1000);
+
+	pci_read_config_dword(pdev, VL805_PCI_CONFIG_VERSION_OFFSET,
+			      &version);
+exit:
+	pci_info(pdev, "VL805 firmware version %08x\n", version);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rpi_firmware_init_vl805);
+
 static const struct of_device_id rpi_firmware_of_match[] = {
 	{ .compatible = "raspberrypi,bcm2835-firmware", },
 	{},
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index ae36edb1d7db..b08efea39496 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -58,15 +58,33 @@ config PCIE_RCAR
 	bool "Renesas R-Car PCIe controller"
 	depends on ARCH_RENESAS || COMPILE_TEST
 	depends on PCI_MSI_IRQ_DOMAIN
+	select PCIE_RCAR_HOST
 	help
 	  Say Y here if you want PCIe controller support on R-Car SoCs.
+	  This option will be removed after arm64 defconfig is updated.
+
+config PCIE_RCAR_HOST
+	bool "Renesas R-Car PCIe host controller"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	depends on PCI_MSI_IRQ_DOMAIN
+	help
+	  Say Y here if you want PCIe controller support on R-Car SoCs in host
+	  mode.
+
+config PCIE_RCAR_EP
+	bool "Renesas R-Car PCIe endpoint controller"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	depends on PCI_ENDPOINT
+	help
+	  Say Y here if you want PCIe controller support on R-Car SoCs in
+	  endpoint mode.
 
 config PCI_HOST_COMMON
-	bool
+	tristate
 	select PCI_ECAM
 
 config PCI_HOST_GENERIC
-	bool "Generic PCI host controller"
+	tristat