include/linux/pci-acpi.h

   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_ */