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 			   const 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_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
pci_acpi_setup(struct device * dev,struct acpi_device * adev)91 static inline void pci_acpi_setup(struct device *dev, struct acpi_device *adev) {}
pci_acpi_cleanup(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
acpi_pci_slot_init(void)100 static inline void acpi_pci_slot_init(void) { }
acpi_pci_slot_enumerate(struct pci_bus * bus)101 static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { }
acpi_pci_slot_remove(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
acpiphp_init(void)111 static inline void acpiphp_init(void) { }
acpiphp_enumerate_slots(struct pci_bus * bus)112 static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
acpiphp_remove_slots(struct pci_bus * bus)113 static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
acpiphp_check_host_bridge(struct acpi_device * adev)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
pci_acpi_add_edr_notifier(struct pci_dev * pdev)129 static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { }
pci_acpi_remove_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 */
acpi_pci_add_bus(struct pci_bus * bus)137 static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
acpi_pci_remove_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