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_PCI
88 void pci_acpi_setup(struct device *dev, struct acpi_device *adev);
89 void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev);
90 #else
91 static inline void pci_acpi_setup(struct device *dev, struct acpi_device *adev) {}
92 static inline void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev) {}
93 #endif
94
95 #ifdef CONFIG_ACPI_PCI_SLOT
96 void acpi_pci_slot_init(void);
97 void acpi_pci_slot_enumerate(struct pci_bus *bus);
98 void acpi_pci_slot_remove(struct pci_bus *bus);
99 #else
100 static inline void acpi_pci_slot_init(void) { }
101 static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { }
102 static inline void acpi_pci_slot_remove(struct pci_bus *bus) { }
103 #endif
104
105 #ifdef CONFIG_HOTPLUG_PCI_ACPI
106 void acpiphp_init(void);
107 void acpiphp_enumerate_slots(struct pci_bus *bus);
108 void acpiphp_remove_slots(struct pci_bus *bus);
109 void acpiphp_check_host_bridge(struct acpi_device *adev);
110 #else
111 static inline void acpiphp_init(void) { }
112 static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
113 static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
114 static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
115 #endif
116
117 extern const guid_t pci_acpi_dsm_guid;
118
119 /* _DSM Definitions for PCI */
120 #define DSM_PCI_PRESERVE_BOOT_CONFIG 0x05
121 #define DSM_PCI_DEVICE_NAME 0x07
122 #define DSM_PCI_POWER_ON_RESET_DELAY 0x08
123 #define DSM_PCI_DEVICE_READINESS_DURATIONS 0x09
124
125 #ifdef CONFIG_PCIE_EDR
126 void pci_acpi_add_edr_notifier(struct pci_dev *pdev);
127 void pci_acpi_remove_edr_notifier(struct pci_dev *pdev);
128 #else
129 static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { }
130 static inline void pci_acpi_remove_edr_notifier(struct pci_dev *pdev) { }
131 #endif /* CONFIG_PCIE_EDR */
132
133 int pci_acpi_set_companion_lookup_hook(struct acpi_device *(*func)(struct pci_dev *));
134 void pci_acpi_clear_companion_lookup_hook(void);
135
136 #else /* CONFIG_ACPI */
137 static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
138 static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
139 #endif /* CONFIG_ACPI */
140
141 #endif /* _PCI_ACPI_H_ */
142
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