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- /* 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 ([email protected])
- * Copyright (C) 2001 IBM Corp.
- * Copyright (C) 2002 Hiroshi Aono ([email protected])
- * Copyright (C) 2002,2003 Takayoshi Kochi ([email protected])
- * Copyright (C) 2002,2003 NEC Corporation
- * Copyright (C) 2003-2005 Matthew Wilcox ([email protected])
- * Copyright (C) 2003-2005 Hewlett Packard
- *
- * All rights reserved.
- *
- * Send feedback to <[email protected]>,
- * <[email protected]>
- *
- */
- #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 */
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