1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Purpose: PCI Express Port Bus Driver's Internal Data Structures 4 * 5 * Copyright (C) 2004 Intel 6 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) 7 */ 8 9 #ifndef _PORTDRV_H_ 10 #define _PORTDRV_H_ 11 12 #include <linux/compiler.h> 13 14 /* Service Type */ 15 #define PCIE_PORT_SERVICE_PME_SHIFT 0 /* Power Management Event */ 16 #define PCIE_PORT_SERVICE_PME (1 << PCIE_PORT_SERVICE_PME_SHIFT) 17 #define PCIE_PORT_SERVICE_AER_SHIFT 1 /* Advanced Error Reporting */ 18 #define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT) 19 #define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */ 20 #define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT) 21 #define PCIE_PORT_SERVICE_DPC_SHIFT 3 /* Downstream Port Containment */ 22 #define PCIE_PORT_SERVICE_DPC (1 << PCIE_PORT_SERVICE_DPC_SHIFT) 23 #define PCIE_PORT_SERVICE_BWCTRL_SHIFT 4 /* Bandwidth Controller (notifications) */ 24 #define PCIE_PORT_SERVICE_BWCTRL (1 << PCIE_PORT_SERVICE_BWCTRL_SHIFT) 25 26 #define PCIE_PORT_DEVICE_MAXSERVICES 5 27 28 extern bool pcie_ports_dpc_native; 29 30 #ifdef CONFIG_PCIEAER 31 int pcie_aer_init(void); 32 #else 33 static inline int pcie_aer_init(void) { return 0; } 34 #endif 35 36 #ifdef CONFIG_HOTPLUG_PCI_PCIE 37 int pcie_hp_init(void); 38 #else 39 static inline int pcie_hp_init(void) { return 0; } 40 #endif 41 42 #ifdef CONFIG_PCIE_PME 43 int pcie_pme_init(void); 44 #else 45 static inline int pcie_pme_init(void) { return 0; } 46 #endif 47 48 #ifdef CONFIG_PCIE_DPC 49 int pcie_dpc_init(void); 50 #else 51 static inline int pcie_dpc_init(void) { return 0; } 52 #endif 53 54 int pcie_bwctrl_init(void); 55 56 /* Port Type */ 57 #define PCIE_ANY_PORT (~0) 58 59 struct pcie_device { 60 int irq; /* Service IRQ/MSI/MSI-X Vector */ 61 struct pci_dev *port; /* Root/Upstream/Downstream Port */ 62 u32 service; /* Port service this device represents */ 63 void *priv_data; /* Service Private Data */ 64 struct device device; /* Generic Device Interface */ 65 }; 66 #define to_pcie_device(d) container_of(d, struct pcie_device, device) 67 68 static inline void set_service_data(struct pcie_device *dev, void *data) 69 { 70 dev->priv_data = data; 71 } 72 73 static inline void *get_service_data(struct pcie_device *dev) 74 { 75 return dev->priv_data; 76 } 77 78 struct pcie_port_service_driver { 79 const char *name; 80 int (*probe)(struct pcie_device *dev); 81 void (*remove)(struct pcie_device *dev); 82 int (*suspend)(struct pcie_device *dev); 83 int (*resume_noirq)(struct pcie_device *dev); 84 int (*resume)(struct pcie_device *dev); 85 int (*runtime_suspend)(struct pcie_device *dev); 86 int (*runtime_resume)(struct pcie_device *dev); 87 88 int (*slot_reset)(struct pcie_device *dev); 89 90 int port_type; /* Type of the port this driver can handle */ 91 u32 service; /* Port service this device represents */ 92 93 struct device_driver driver; 94 }; 95 #define to_service_driver(d) \ 96 container_of(d, struct pcie_port_service_driver, driver) 97 98 int pcie_port_service_register(struct pcie_port_service_driver *new); 99 void pcie_port_service_unregister(struct pcie_port_service_driver *new); 100 101 extern const struct bus_type pcie_port_bus_type; 102 103 struct pci_dev; 104 105 #ifdef CONFIG_PCIE_PME 106 extern bool pcie_pme_msi_disabled; 107 108 static inline void pcie_pme_disable_msi(void) 109 { 110 pcie_pme_msi_disabled = true; 111 } 112 113 static inline bool pcie_pme_no_msi(void) 114 { 115 return pcie_pme_msi_disabled; 116 } 117 118 void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable); 119 #else /* !CONFIG_PCIE_PME */ 120 static inline void pcie_pme_disable_msi(void) {} 121 static inline bool pcie_pme_no_msi(void) { return false; } 122 static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {} 123 #endif /* !CONFIG_PCIE_PME */ 124 125 struct device *pcie_port_find_device(struct pci_dev *dev, u32 service); 126 #endif /* _PORTDRV_H_ */ 127