xref: /linux-6.15/include/linux/pci-acpi.h (revision 094dbffe)
1 /*
2  * File		pci-acpi.h
3  *
4  * Copyright (C) 2004 Intel
5  * Copyright (C) Tom Long Nguyen ([email protected])
6  */
7 
8 #ifndef _PCI_ACPI_H_
9 #define _PCI_ACPI_H_
10 
11 #include <linux/acpi.h>
12 
13 #ifdef CONFIG_ACPI
14 extern acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev);
15 static inline acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
16 {
17 	return acpi_remove_pm_notifier(dev);
18 }
19 extern acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
20 					     struct pci_dev *pci_dev);
21 static inline acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
22 {
23 	return acpi_remove_pm_notifier(dev);
24 }
25 extern phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle);
26 
27 extern phys_addr_t pci_mcfg_lookup(u16 domain, struct resource *bus_res);
28 
29 static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
30 {
31 	struct pci_bus *pbus = pdev->bus;
32 
33 	/* Find a PCI root bus */
34 	while (!pci_is_root_bus(pbus))
35 		pbus = pbus->parent;
36 
37 	return ACPI_HANDLE(pbus->bridge);
38 }
39 
40 static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
41 {
42 	struct device *dev;
43 
44 	if (pci_is_root_bus(pbus))
45 		dev = pbus->bridge;
46 	else {
47 		/* If pbus is a virtual bus, there is no bridge to it */
48 		if (!pbus->self)
49 			return NULL;
50 
51 		dev = &pbus->self->dev;
52 	}
53 
54 	return ACPI_HANDLE(dev);
55 }
56 
57 struct acpi_pci_root;
58 struct acpi_pci_root_ops;
59 
60 struct acpi_pci_root_info {
61 	struct acpi_pci_root		*root;
62 	struct acpi_device		*bridge;
63 	struct acpi_pci_root_ops	*ops;
64 	struct list_head		resources;
65 	char				name[16];
66 };
67 
68 struct acpi_pci_root_ops {
69 	struct pci_ops *pci_ops;
70 	int (*init_info)(struct acpi_pci_root_info *info);
71 	void (*release_info)(struct acpi_pci_root_info *info);
72 	int (*prepare_resources)(struct acpi_pci_root_info *info);
73 };
74 
75 extern int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info);
76 extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
77 					    struct acpi_pci_root_ops *ops,
78 					    struct acpi_pci_root_info *info,
79 					    void *sd);
80 
81 void acpi_pci_add_bus(struct pci_bus *bus);
82 void acpi_pci_remove_bus(struct pci_bus *bus);
83 
84 #ifdef	CONFIG_ACPI_PCI_SLOT
85 void acpi_pci_slot_init(void);
86 void acpi_pci_slot_enumerate(struct pci_bus *bus);
87 void acpi_pci_slot_remove(struct pci_bus *bus);
88 #else
89 static inline void acpi_pci_slot_init(void) { }
90 static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { }
91 static inline void acpi_pci_slot_remove(struct pci_bus *bus) { }
92 #endif
93 
94 #ifdef	CONFIG_HOTPLUG_PCI_ACPI
95 void acpiphp_init(void);
96 void acpiphp_enumerate_slots(struct pci_bus *bus);
97 void acpiphp_remove_slots(struct pci_bus *bus);
98 void acpiphp_check_host_bridge(struct acpi_device *adev);
99 #else
100 static inline void acpiphp_init(void) { }
101 static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
102 static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
103 static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
104 #endif
105 
106 extern const u8 pci_acpi_dsm_uuid[];
107 #define DEVICE_LABEL_DSM	0x07
108 #define RESET_DELAY_DSM		0x08
109 #define FUNCTION_DELAY_DSM	0x09
110 
111 #else	/* CONFIG_ACPI */
112 static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
113 static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
114 #endif	/* CONFIG_ACPI */
115 
116 #ifdef CONFIG_ACPI_APEI
117 extern bool aer_acpi_firmware_first(void);
118 #else
119 static inline bool aer_acpi_firmware_first(void) { return false; }
120 #endif
121 
122 #endif	/* _PCI_ACPI_H_ */
123