1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * File pci-acpi.h 4 * 5 * Copyright (C) 2004 Intel 6 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) 7 */ 8 9 #ifndef _PCI_ACPI_H_ 10 #define _PCI_ACPI_H_ 11 12 #include <linux/acpi.h> 13 14 #ifdef CONFIG_ACPI 15 extern acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev); 16 static inline acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev) 17 { 18 return acpi_remove_pm_notifier(dev); 19 } 20 extern acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev, 21 struct pci_dev *pci_dev); 22 static inline acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev) 23 { 24 return acpi_remove_pm_notifier(dev); 25 } 26 extern phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle); 27 28 struct pci_ecam_ops; 29 extern int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres, 30 const struct pci_ecam_ops **ecam_ops); 31 32 static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev) 33 { 34 struct pci_bus *pbus = pdev->bus; 35 36 /* Find a PCI root bus */ 37 while (!pci_is_root_bus(pbus)) 38 pbus = pbus->parent; 39 40 return ACPI_HANDLE(pbus->bridge); 41 } 42 43 static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus) 44 { 45 struct device *dev; 46 47 if (pci_is_root_bus(pbus)) 48 dev = pbus->bridge; 49 else { 50 /* If pbus is a virtual bus, there is no bridge to it */ 51 if (!pbus->self) 52 return NULL; 53 54 dev = &pbus->self->dev; 55 } 56 57 return ACPI_HANDLE(dev); 58 } 59 60 struct acpi_pci_root; 61 struct acpi_pci_root_ops; 62 63 struct acpi_pci_root_info { 64 struct acpi_pci_root *root; 65 struct acpi_device *bridge; 66 struct acpi_pci_root_ops *ops; 67 struct list_head resources; 68 char name[16]; 69 }; 70 71 struct acpi_pci_root_ops { 72 struct pci_ops *pci_ops; 73 int (*init_info)(struct acpi_pci_root_info *info); 74 void (*release_info)(struct acpi_pci_root_info *info); 75 int (*prepare_resources)(struct acpi_pci_root_info *info); 76 }; 77 78 extern int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info); 79 extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, 80 struct acpi_pci_root_ops *ops, 81 struct acpi_pci_root_info *info, 82 void *sd); 83 84 void acpi_pci_add_bus(struct pci_bus *bus); 85 void acpi_pci_remove_bus(struct pci_bus *bus); 86 87 #ifdef CONFIG_ACPI_PCI_SLOT 88 void acpi_pci_slot_init(void); 89 void acpi_pci_slot_enumerate(struct pci_bus *bus); 90 void acpi_pci_slot_remove(struct pci_bus *bus); 91 #else 92 static inline void acpi_pci_slot_init(void) { } 93 static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { } 94 static inline void acpi_pci_slot_remove(struct pci_bus *bus) { } 95 #endif 96 97 #ifdef CONFIG_HOTPLUG_PCI_ACPI 98 void acpiphp_init(void); 99 void acpiphp_enumerate_slots(struct pci_bus *bus); 100 void acpiphp_remove_slots(struct pci_bus *bus); 101 void acpiphp_check_host_bridge(struct acpi_device *adev); 102 #else 103 static inline void acpiphp_init(void) { } 104 static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { } 105 static inline void acpiphp_remove_slots(struct pci_bus *bus) { } 106 static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { } 107 #endif 108 109 extern const guid_t pci_acpi_dsm_guid; 110 111 /* _DSM Definitions for PCI */ 112 #define DSM_PCI_PRESERVE_BOOT_CONFIG 0x05 113 #define DSM_PCI_DEVICE_NAME 0x07 114 #define DSM_PCI_POWER_ON_RESET_DELAY 0x08 115 #define DSM_PCI_DEVICE_READINESS_DURATIONS 0x09 116 117 #ifdef CONFIG_PCIE_EDR 118 void pci_acpi_add_edr_notifier(struct pci_dev *pdev); 119 void pci_acpi_remove_edr_notifier(struct pci_dev *pdev); 120 #else 121 static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { } 122 static inline void pci_acpi_remove_edr_notifier(struct pci_dev *pdev) { } 123 #endif /* CONFIG_PCIE_EDR */ 124 125 #else /* CONFIG_ACPI */ 126 static inline void acpi_pci_add_bus(struct pci_bus *bus) { } 127 static inline void acpi_pci_remove_bus(struct pci_bus *bus) { } 128 #endif /* CONFIG_ACPI */ 129 130 #endif /* _PCI_ACPI_H_ */ 131