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);
pci_acpi_remove_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);
pci_acpi_remove_pm_notifier(struct acpi_device * 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 			   struct pci_ecam_ops **ecam_ops);
31 
acpi_find_root_bridge_handle(struct pci_dev * pdev)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 
acpi_pci_get_bridge_handle(struct pci_bus * pbus)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
acpi_pci_slot_init(void)92 static inline void acpi_pci_slot_init(void) { }
acpi_pci_slot_enumerate(struct pci_bus * bus)93 static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { }
acpi_pci_slot_remove(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
acpiphp_init(void)103 static inline void acpiphp_init(void) { }
acpiphp_enumerate_slots(struct pci_bus * bus)104 static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
acpiphp_remove_slots(struct pci_bus * bus)105 static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
acpiphp_check_host_bridge(struct acpi_device * adev)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 #define DEVICE_LABEL_DSM	0x07
111 #define RESET_DELAY_DSM		0x08
112 #define FUNCTION_DELAY_DSM	0x09
113 
114 #else	/* CONFIG_ACPI */
acpi_pci_add_bus(struct pci_bus * bus)115 static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
acpi_pci_remove_bus(struct pci_bus * bus)116 static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
117 #endif	/* CONFIG_ACPI */
118 
119 #ifdef CONFIG_ACPI_APEI
120 extern bool aer_acpi_firmware_first(void);
121 #else
aer_acpi_firmware_first(void)122 static inline bool aer_acpi_firmware_first(void) { return false; }
123 #endif
124 
125 #endif	/* _PCI_ACPI_H_ */
126