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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | /* SPDX-License-Identifier: GPL-2.0+ */ /* * ACPI PCI Hot Plug Controller Driver * * Copyright (C) 1995,2001 Compaq Computer Corporation * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) * Copyright (C) 2001 IBM Corp. * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com) * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com) * Copyright (C) 2002,2003 NEC Corporation * Copyright (C) 2003-2005 Matthew Wilcox (willy@infradead.org) * Copyright (C) 2003-2005 Hewlett Packard * * All rights reserved. * * Send feedback to <gregkh@us.ibm.com>, * <t-kochi@bq.jp.nec.com> * */ #ifndef _ACPIPHP_H #define _ACPIPHP_H #include <linux/acpi.h> #include <linux/mutex.h> #include <linux/pci_hotplug.h> struct acpiphp_context; struct acpiphp_bridge; struct acpiphp_slot; /* * struct slot - slot information for each *physical* slot */ struct slot { struct hotplug_slot hotplug_slot; struct acpiphp_slot *acpi_slot; unsigned int sun; /* ACPI _SUN (Slot User Number) value */ }; static inline const char *slot_name(struct slot *slot) { return hotplug_slot_name(&slot->hotplug_slot); } static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) { return container_of(hotplug_slot, struct slot, hotplug_slot); } /* * struct acpiphp_bridge - PCI bridge information * * for each bridge device in ACPI namespace */ struct acpiphp_bridge { struct list_head list; struct list_head slots; struct kref ref; struct acpiphp_context *context; int nr_slots; /* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */ struct pci_bus *pci_bus; /* PCI-to-PCI bridge device */ struct pci_dev *pci_dev; bool is_going_away; }; /* * struct acpiphp_slot - PCI slot information * * PCI slot information for each *physical* PCI slot */ struct acpiphp_slot { struct list_head node; struct pci_bus *bus; struct list_head funcs; /* one slot may have different objects (i.e. for each function) */ struct slot *slot; u8 device; /* pci device# */ u32 flags; /* see below */ }; /* * struct acpiphp_func - PCI function information * * PCI function information for each object in ACPI namespace * typically 8 objects per slot (i.e. for each PCI function) */ struct acpiphp_func { struct acpiphp_bridge *parent; struct acpiphp_slot *slot; struct list_head sibling; u8 function; /* pci function# */ u32 flags; /* see below */ }; struct acpiphp_context { struct acpi_hotplug_context hp; struct acpiphp_func func; struct acpiphp_bridge *bridge; unsigned int refcount; }; static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp) { return container_of(hp, struct acpiphp_context, hp); } static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func) { return container_of(func, struct acpiphp_context, func); } static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func) { return func_to_context(func)->hp.self; } static inline acpi_handle func_to_handle(struct acpiphp_func *func) { return func_to_acpi_device(func)->handle; } struct acpiphp_root_context { struct acpi_hotplug_context hp; struct acpiphp_bridge *root_bridge; }; static inline struct acpiphp_root_context *to_acpiphp_root_context(struct acpi_hotplug_context *hp) { return container_of(hp, struct acpiphp_root_context, hp); } /* * struct acpiphp_attention_info - device specific attention registration * * ACPI has no generic method of setting/getting attention status * this allows for device specific driver registration */ struct acpiphp_attention_info { int (*set_attn)(struct hotplug_slot *slot, u8 status); int (*get_attn)(struct hotplug_slot *slot, u8 *status); struct module *owner; }; /* ACPI _STA method value (ignore bit 4; battery present) */ #define ACPI_STA_ALL (0x0000000f) /* slot flags */ #define SLOT_ENABLED (0x00000001) #define SLOT_IS_GOING_AWAY (0x00000002) /* function flags */ #define FUNC_HAS_STA (0x00000001) #define FUNC_HAS_EJ0 (0x00000002) /* function prototypes */ /* acpiphp_core.c */ int acpiphp_register_attention(struct acpiphp_attention_info *info); int acpiphp_unregister_attention(struct acpiphp_attention_info *info); int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun); void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot); int acpiphp_enable_slot(struct acpiphp_slot *slot); int acpiphp_disable_slot(struct acpiphp_slot *slot); u8 acpiphp_get_power_status(struct acpiphp_slot *slot); u8 acpiphp_get_attention_status(struct acpiphp_slot *slot); u8 acpiphp_get_latch_status(struct acpiphp_slot *slot); u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot); /* variables */ extern bool acpiphp_disabled; #endif /* _ACPIPHP_H */ |