Merge tag 'pci-v5.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:
   - Remove unnecessary locking around _OSC (Bjorn Helgaas)
   - Clarify message about _OSC failure (Bjorn Helgaas)
   - Remove notification of PCIe bandwidth changes (Bjorn Helgaas)
   - Tidy checking of syscall user config accessors (Heiner Kallweit)

  Resource management:
   - Decline to resize resources if boot config must be preserved (Ard
     Biesheuvel)
   - Fix pci_register_io_range() memory leak (Geert Uytterhoeven)

  Error handling (Keith Busch):
   - Clear error status from the correct device
   - Retain error recovery status so drivers can use it after reset
   - Log the type of Port (Root or Switch Downstream) that we reset
   - Always request a reset for Downstream Ports in frozen state

  Endpoint framework and NTB (Kishon Vijay Abraham I):
   - Make *_get_first_free_bar() take into account 64 bit BAR
   - Add helper API to get the 'next' unreserved BAR
   - Make *_free_bar() return error codes on failure
   - Remove unused pci_epf_match_device()
   - Add support to associate secondary EPC with EPF
   - Add support in configfs to associate two EPCs with EPF
   - Add pci_epc_ops to map MSI IRQ
   - Add pci_epf_ops to expose function-specific attrs
   - Allow user to create sub-directory of 'EPF Device' directory
   - Implement ->msi_map_irq() ops for cadence
   - Configure LM_EP_FUNC_CFG based on epc->function_num_map for cadence
   - Add EP function driver to provide NTB functionality
   - Add support for EPF PCI Non-Transparent Bridge
   - Add specification for PCI NTB function device
   - Add PCI endpoint NTB function user guide
   - Add configfs binding documentation for pci-ntb endpoint function

  Broadcom STB PCIe controller driver:
   - Add support for BCM4908 and external PERST# signal controller
     (Rafał Miłecki)

  Cadence PCIe controller driver:
   - Retrain Link to work around Gen2 training defect (Nadeem Athani)
   - Fix merge botch in cdns_pcie_host_map_dma_ranges() (Krzysztof
     Wilczyński)

  Freescale Layerscape PCIe controller driver:
   - Add LX2160A rev2 EP mode support (Hou Zhiqiang)
   - Convert to builtin_platform_driver() (Michael Walle)

  MediaTek PCIe controller driver:
   - Fix OF node reference leak (Krzysztof Wilczyński)

  Microchip PolarFlare PCIe controller driver:
   - Add Microchip PolarFire PCIe controller driver (Daire McNamara)

  Qualcomm PCIe controller driver:
   - Use PHY_REFCLK_USE_PAD only for ipq8064 (Ansuel Smith)
   - Add support for ddrss_sf_tbu clock for sm8250 (Dmitry Baryshkov)

  Renesas R-Car PCIe controller driver:
   - Drop PCIE_RCAR config option (Lad Prabhakar)
   - Always allocate MSI addresses in 32bit space (Marek Vasut)

  Rockchip PCIe controller driver:
   - Add FriendlyARM NanoPi M4B DT binding (Chen-Yu Tsai)
   - Make 'ep-gpios' DT property optional (Chen-Yu Tsai)

  Synopsys DesignWare PCIe controller driver:
   - Work around ECRC configuration hardware defect (Vidya Sagar)
   - Drop support for config space in DT 'ranges' (Rob Herring)
   - Change size to u64 for EP outbound iATU (Shradha Todi)
   - Add upper limit address for outbound iATU (Shradha Todi)
   - Make dw_pcie ops optional (Jisheng Zhang)
   - Remove unnecessary dw_pcie_ops from al driver (Jisheng Zhang)

  Xilinx Versal CPM PCIe controller driver:
   - Fix OF node reference leak (Pan Bian)

  Miscellaneous:
   - Remove tango host controller driver (Arnd Bergmann)
   - Remove IRQ handler & data together (altera-msi, brcmstb, dwc)
     (Martin Kaiser)
   - Fix xgene-msi race in installing chained IRQ handler (Martin
     Kaiser)
   - Apply CONFIG_PCI_DEBUG to entire drivers/pci hierarchy (Junhao He)
   - Fix pci-bridge-emul array overruns (Russell King)
   - Remove obsolete uses of WARN_ON(in_interrupt()) (Sebastian Andrzej
     Siewior)"

* tag 'pci-v5.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (69 commits)
  PCI: qcom: Use PHY_REFCLK_USE_PAD only for ipq8064
  PCI: qcom: Add support for ddrss_sf_tbu clock
  dt-bindings: PCI: qcom: Document ddrss_sf_tbu clock for sm8250
  PCI: al: Remove useless dw_pcie_ops
  PCI: dwc: Don't assume the ops in dw_pcie always exist
  PCI: dwc: Add upper limit address for outbound iATU
  PCI: dwc: Change size to u64 for EP outbound iATU
  PCI: dwc: Drop support for config space in 'ranges'
  PCI: layerscape: Convert to builtin_platform_driver()
  PCI: layerscape: Add LX2160A rev2 EP mode support
  dt-bindings: PCI: layerscape: Add LX2160A rev2 compatible strings
  PCI: dwc: Work around ECRC configuration issue
  PCI/portdrv: Report reset for frozen channel
  PCI/AER: Specify the type of Port that was reset
  PCI/ERR: Retain status from error notification
  PCI/AER: Clear AER status from Root Port when resetting Downstream Port
  PCI/ERR: Clear status of the reporting device
  dt-bindings: arm: rockchip: Add FriendlyARM NanoPi M4B
  PCI: rockchip: Make 'ep-gpios' DT property optional
  Documentation: PCI: Add PCI endpoint NTB function user guide
  ...

4 files changed, 62 insertions, 11 deletions

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index d33c3cfb1794..3c5757d539ab 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -591,9 +591,6 @@ extern u32 osc_sb_native_usb4_control;
 #define ACPI_GSB_ACCESS_ATTRIB_RAW_BYTES	0x0000000E
 #define ACPI_GSB_ACCESS_ATTRIB_RAW_PROCESS	0x0000000F
 
-extern acpi_status acpi_pci_osc_control_set(acpi_handle handle,
-					     u32 *mask, u32 req);
-
 /* Enable _OST when all relevant hotplug operations are enabled */
 #if defined(CONFIG_ACPI_HOTPLUG_CPU) &&			\
 	defined(CONFIG_ACPI_HOTPLUG_MEMORY) &&		\
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index cc66bec8be90..b82c9b100e97 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -13,6 +13,12 @@
 
 struct pci_epc;
 
+enum pci_epc_interface_type {
+	UNKNOWN_INTERFACE = -1,
+	PRIMARY_INTERFACE,
+	SECONDARY_INTERFACE,
+};
+
 enum pci_epc_irq_type {
 	PCI_EPC_IRQ_UNKNOWN,
 	PCI_EPC_IRQ_LEGACY,
@@ -20,6 +26,19 @@ enum pci_epc_irq_type {
 	PCI_EPC_IRQ_MSIX,
 };
 
+static inline const char *
+pci_epc_interface_string(enum pci_epc_interface_type type)
+{
+	switch (type) {
+	case PRIMARY_INTERFACE:
+		return "primary";
+	case SECONDARY_INTERFACE:
+		return "secondary";
+	default:
+		return "UNKNOWN interface";
+	}
+}
+
 /**
  * struct pci_epc_ops - set of function pointers for performing EPC operations
  * @write_header: ops to populate configuration space header
@@ -36,6 +55,7 @@ enum pci_epc_irq_type {
  * @get_msix: ops to get the number of MSI-X interrupts allocated by the RC
  *	     from the MSI-X capability register
  * @raise_irq: ops to raise a legacy, MSI or MSI-X interrupt
+ * @map_msi_irq: ops to map physical address to MSI address and return MSI data
  * @start: ops to start the PCI link
  * @stop: ops to stop the PCI link
  * @owner: the module owner containing the ops
@@ -58,6 +78,10 @@ struct pci_epc_ops {
 	int	(*get_msix)(struct pci_epc *epc, u8 func_no);
 	int	(*raise_irq)(struct pci_epc *epc, u8 func_no,
 			     enum pci_epc_irq_type type, u16 interrupt_num);
+	int	(*map_msi_irq)(struct pci_epc *epc, u8 func_no,
+			       phys_addr_t phys_addr, u8 interrupt_num,
+			       u32 entry_size, u32 *msi_data,
+			       u32 *msi_addr_offset);
 	int	(*start)(struct pci_epc *epc);
 	void	(*stop)(struct pci_epc *epc);
 	const struct pci_epc_features* (*get_features)(struct pci_epc *epc,
@@ -175,10 +199,12 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
 		 struct module *owner);
 void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc);
 void pci_epc_destroy(struct pci_epc *epc);
-int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf);
+int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf,
+		    enum pci_epc_interface_type type);
 void pci_epc_linkup(struct pci_epc *epc);
 void pci_epc_init_notify(struct pci_epc *epc);
-void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
+void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf,
+			enum pci_epc_interface_type type);
 int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
 			 struct pci_epf_header *hdr);
 int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
@@ -195,14 +221,19 @@ int pci_epc_get_msi(struct pci_epc *epc, u8 func_no);
 int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts,
 		     enum pci_barno, u32 offset);
 int pci_epc_get_msix(struct pci_epc *epc, u8 func_no);
+int pci_epc_map_msi_irq(struct pci_epc *epc, u8 func_no,
+			phys_addr_t phys_addr, u8 interrupt_num,
+			u32 entry_size, u32 *msi_data, u32 *msi_addr_offset);
 int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
 		      enum pci_epc_irq_type type, u16 interrupt_num);
 int pci_epc_start(struct pci_epc *epc);
 void pci_epc_stop(struct pci_epc *epc);
 const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
 						    u8 func_no);
-unsigned int pci_epc_get_first_free_bar(const struct pci_epc_features
-					*epc_features);
+enum pci_barno
+pci_epc_get_first_free_bar(const struct pci_epc_features *epc_features);
+enum pci_barno pci_epc_get_next_free_bar(const struct pci_epc_features
+					 *epc_features, enum pci_barno bar);
 struct pci_epc *pci_epc_get(const char *epc_name);
 void pci_epc_put(struct pci_epc *epc);
 
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 6644ff3b0702..6833e2160ef1 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -9,11 +9,13 @@
 #ifndef __LINUX_PCI_EPF_H
 #define __LINUX_PCI_EPF_H
 
+#include <linux/configfs.h>
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
 #include <linux/pci.h>
 
 struct pci_epf;
+enum pci_epc_interface_type;
 
 enum pci_notify_event {
 	CORE_INIT,
@@ -21,6 +23,7 @@ enum pci_notify_event {
 };
 
 enum pci_barno {
+	NO_BAR = -1,
 	BAR_0,
 	BAR_1,
 	BAR_2,
@@ -60,10 +63,13 @@ struct pci_epf_header {
  * @bind: ops to perform when a EPC device has been bound to EPF device
  * @unbind: ops to perform when a binding has been lost between a EPC device
  *	    and EPF device
+ * @add_cfs: ops to initialize function specific configfs attributes
  */
 struct pci_epf_ops {
 	int	(*bind)(struct pci_epf *epf);
 	void	(*unbind)(struct pci_epf *epf);
+	struct config_group *(*add_cfs)(struct pci_epf *epf,
+					struct config_group *group);
 };
 
 /**
@@ -118,6 +124,12 @@ struct pci_epf_bar {
  * @list: to add pci_epf as a list of PCI endpoint functions to pci_epc
  * @nb: notifier block to notify EPF of any EPC events (like linkup)
  * @lock: mutex to protect pci_epf_ops
+ * @sec_epc: the secondary EPC device to which this EPF device is bound
+ * @sec_epc_list: to add pci_epf as list of PCI endpoint functions to secondary
+ *   EPC device
+ * @sec_epc_bar: represents the BAR of EPF device associated with secondary EPC
+ * @sec_epc_func_no: unique (physical) function number within the secondary EPC
+ * @group: configfs group associated with the EPF device
  */
 struct pci_epf {
 	struct device		dev;
@@ -134,6 +146,13 @@ struct pci_epf {
 	struct notifier_block   nb;
 	/* mutex to protect against concurrent access of pci_epf_ops */
 	struct mutex		lock;
+
+	/* Below members are to attach secondary EPC to an endpoint function */
+	struct pci_epc		*sec_epc;
+	struct list_head	sec_epc_list;
+	struct pci_epf_bar	sec_epc_bar[6];
+	u8			sec_epc_func_no;
+	struct config_group	*group;
 };
 
 /**
@@ -164,16 +183,17 @@ static inline void *epf_get_drvdata(struct pci_epf *epf)
 	return dev_get_drvdata(&epf->dev);
 }
 
-const struct pci_epf_device_id *
-pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf);
 struct pci_epf *pci_epf_create(const char *name);
 void pci_epf_destroy(struct pci_epf *epf);
 int __pci_epf_register_driver(struct pci_epf_driver *driver,
 			      struct module *owner);
 void pci_epf_unregister_driver(struct pci_epf_driver *driver);
 void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
-			  size_t align);
-void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar);
+			  size_t align, enum pci_epc_interface_type type);
+void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar,
+			enum pci_epc_interface_type type);
 int pci_epf_bind(struct pci_epf *epf);
 void pci_epf_unbind(struct pci_epf *epf);
+struct config_group *pci_epf_type_add_cfs(struct pci_epf *epf,
+					  struct config_group *group);
 #endif /* __LINUX_PCI_EPF_H */
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 766260a9b247..a76ccb697bef 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -882,6 +882,7 @@
 #define PCI_DEVICE_ID_TI_X620		0xac8d
 #define PCI_DEVICE_ID_TI_X420		0xac8e
 #define PCI_DEVICE_ID_TI_XX20_FM	0xac8f
+#define PCI_DEVICE_ID_TI_J721E		0xb00d
 #define PCI_DEVICE_ID_TI_DRA74x		0xb500
 #define PCI_DEVICE_ID_TI_DRA72x		0xb501
 
@@ -2589,6 +2590,8 @@
 
 #define PCI_VENDOR_ID_REDHAT		0x1b36
 
+#define PCI_VENDOR_ID_SILICOM_DENMARK	0x1c2c
+
 #define PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS	0x1c36
 
 #define PCI_VENDOR_ID_CIRCUITCO		0x1cc8