/* SPDX-License-Identifier: GPL-2.0 */ /* * Purpose: PCI Express Port Bus Driver's Internal Data Structures * * Copyright (C) 2004 Intel * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) */ #ifndef _PORTDRV_H_ #define _PORTDRV_H_ #include /* Service Type */ #define PCIE_PORT_SERVICE_PME_SHIFT 0 /* Power Management Event */ #define PCIE_PORT_SERVICE_PME (1 << PCIE_PORT_SERVICE_PME_SHIFT) #define PCIE_PORT_SERVICE_AER_SHIFT 1 /* Advanced Error Reporting */ #define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT) #define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */ #define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT) #define PCIE_PORT_SERVICE_DPC_SHIFT 3 /* Downstream Port Containment */ #define PCIE_PORT_SERVICE_DPC (1 << PCIE_PORT_SERVICE_DPC_SHIFT) #define PCIE_PORT_DEVICE_MAXSERVICES 4 /* Port Type */ #define PCIE_ANY_PORT (~0) struct pcie_device { int irq; /* Service IRQ/MSI/MSI-X Vector */ struct pci_dev *port; /* Root/Upstream/Downstream Port */ u32 service; /* Port service this device represents */ void *priv_data; /* Service Private Data */ struct device device; /* Generic Device Interface */ }; #define to_pcie_device(d) container_of(d, struct pcie_device, device) static inline void set_service_data(struct pcie_device *dev, void *data) { dev->priv_data = data; } static inline void *get_service_data(struct pcie_device *dev) { return dev->priv_data; } struct pcie_port_service_driver { const char *name; int (*probe) (struct pcie_device *dev); void (*remove) (struct pcie_device *dev); int (*suspend) (struct pcie_device *dev); int (*resume) (struct pcie_device *dev); /* Device driver may resume normal operations */ void (*error_resume)(struct pci_dev *dev); /* Link Reset Capability - AER service driver specific */ pci_ers_result_t (*reset_link) (struct pci_dev *dev); int port_type; /* Type of the port this driver can handle */ u32 service; /* Port service this device represents */ struct device_driver driver; }; #define to_service_driver(d) \ container_of(d, struct pcie_port_service_driver, driver) int pcie_port_service_register(struct pcie_port_service_driver *new); void pcie_port_service_unregister(struct pcie_port_service_driver *new); /* * The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must * be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI * supports a maximum of 32 vectors per function. */ #define PCIE_PORT_MAX_MSI_ENTRIES 32 #define get_descriptor_id(type, service) (((type - 4) << 8) | service) extern struct bus_type pcie_port_bus_type; int pcie_port_device_register(struct pci_dev *dev); #ifdef CONFIG_PM int pcie_port_device_suspend(struct device *dev); int pcie_port_device_resume(struct device *dev); #endif void pcie_port_device_remove(struct pci_dev *dev); int __must_check pcie_port_bus_register(void); void pcie_port_bus_unregister(void); struct pci_dev; #ifdef CONFIG_PCIE_PME extern bool pcie_pme_msi_disabled; static inline void pcie_pme_disable_msi(void) { pcie_pme_msi_disabled = true; } static inline bool pcie_pme_no_msi(void) { return pcie_pme_msi_disabled; } void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable); #else /* !CONFIG_PCIE_PME */ static inline void pcie_pme_disable_msi(void) {} static inline bool pcie_pme_no_msi(void) { return false; } static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {} #endif /* !CONFIG_PCIE_PME */ #ifdef CONFIG_ACPI_APEI int pcie_aer_get_firmware_first(struct pci_dev *pci_dev); #else static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev) { if (pci_dev->__aer_firmware_first_valid) return pci_dev->__aer_firmware_first; return 0; } #endif #ifdef CONFIG_PCIEAER irqreturn_t aer_irq(int irq, void *context); #endif struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev, u32 service); struct device *pcie_port_find_device(struct pci_dev *dev, u32 service); #endif /* _PORTDRV_H_ */