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189 lines
4.7 KiB
189 lines
4.7 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* ACPI PCI Hot Plug Controller Driver |
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* |
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* Copyright (C) 1995,2001 Compaq Computer Corporation |
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* Copyright (C) 2001 Greg Kroah-Hartman ([email protected]) |
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* Copyright (C) 2001 IBM Corp. |
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* Copyright (C) 2002 Hiroshi Aono ([email protected]) |
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* Copyright (C) 2002,2003 Takayoshi Kochi ([email protected]) |
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* Copyright (C) 2002,2003 NEC Corporation |
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* Copyright (C) 2003-2005 Matthew Wilcox ([email protected]) |
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* Copyright (C) 2003-2005 Hewlett Packard |
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* |
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* All rights reserved. |
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* |
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* Send feedback to <[email protected]>, |
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* <[email protected]> |
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* |
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*/ |
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#ifndef _ACPIPHP_H |
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#define _ACPIPHP_H |
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#include <linux/acpi.h> |
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#include <linux/mutex.h> |
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#include <linux/pci_hotplug.h> |
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struct acpiphp_context; |
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struct acpiphp_bridge; |
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struct acpiphp_slot; |
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/* |
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* struct slot - slot information for each *physical* slot |
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*/ |
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struct slot { |
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struct hotplug_slot hotplug_slot; |
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struct acpiphp_slot *acpi_slot; |
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unsigned int sun; /* ACPI _SUN (Slot User Number) value */ |
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}; |
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static inline const char *slot_name(struct slot *slot) |
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{ |
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return hotplug_slot_name(&slot->hotplug_slot); |
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} |
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static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) |
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{ |
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return container_of(hotplug_slot, struct slot, hotplug_slot); |
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} |
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/* |
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* struct acpiphp_bridge - PCI bridge information |
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* |
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* for each bridge device in ACPI namespace |
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*/ |
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struct acpiphp_bridge { |
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struct list_head list; |
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struct list_head slots; |
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struct kref ref; |
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struct acpiphp_context *context; |
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int nr_slots; |
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/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */ |
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struct pci_bus *pci_bus; |
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/* PCI-to-PCI bridge device */ |
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struct pci_dev *pci_dev; |
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bool is_going_away; |
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}; |
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/* |
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* struct acpiphp_slot - PCI slot information |
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* |
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* PCI slot information for each *physical* PCI slot |
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*/ |
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struct acpiphp_slot { |
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struct list_head node; |
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struct pci_bus *bus; |
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struct list_head funcs; /* one slot may have different |
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objects (i.e. for each function) */ |
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struct slot *slot; |
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u8 device; /* pci device# */ |
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u32 flags; /* see below */ |
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}; |
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/* |
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* struct acpiphp_func - PCI function information |
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* |
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* PCI function information for each object in ACPI namespace |
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* typically 8 objects per slot (i.e. for each PCI function) |
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*/ |
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struct acpiphp_func { |
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struct acpiphp_bridge *parent; |
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struct acpiphp_slot *slot; |
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struct list_head sibling; |
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u8 function; /* pci function# */ |
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u32 flags; /* see below */ |
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}; |
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struct acpiphp_context { |
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struct acpi_hotplug_context hp; |
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struct acpiphp_func func; |
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struct acpiphp_bridge *bridge; |
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unsigned int refcount; |
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}; |
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static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp) |
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{ |
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return container_of(hp, struct acpiphp_context, hp); |
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} |
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static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func) |
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{ |
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return container_of(func, struct acpiphp_context, func); |
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} |
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static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func) |
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{ |
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return func_to_context(func)->hp.self; |
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} |
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static inline acpi_handle func_to_handle(struct acpiphp_func *func) |
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{ |
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return func_to_acpi_device(func)->handle; |
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} |
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struct acpiphp_root_context { |
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struct acpi_hotplug_context hp; |
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struct acpiphp_bridge *root_bridge; |
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}; |
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static inline struct acpiphp_root_context *to_acpiphp_root_context(struct acpi_hotplug_context *hp) |
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{ |
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return container_of(hp, struct acpiphp_root_context, hp); |
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} |
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/* |
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* struct acpiphp_attention_info - device specific attention registration |
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* |
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* ACPI has no generic method of setting/getting attention status |
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* this allows for device specific driver registration |
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*/ |
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struct acpiphp_attention_info |
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{ |
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int (*set_attn)(struct hotplug_slot *slot, u8 status); |
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int (*get_attn)(struct hotplug_slot *slot, u8 *status); |
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struct module *owner; |
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}; |
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/* ACPI _STA method value (ignore bit 4; battery present) */ |
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#define ACPI_STA_ALL (0x0000000f) |
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/* slot flags */ |
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#define SLOT_ENABLED (0x00000001) |
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#define SLOT_IS_GOING_AWAY (0x00000002) |
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/* function flags */ |
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#define FUNC_HAS_STA (0x00000001) |
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#define FUNC_HAS_EJ0 (0x00000002) |
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/* function prototypes */ |
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/* acpiphp_core.c */ |
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int acpiphp_register_attention(struct acpiphp_attention_info *info); |
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int acpiphp_unregister_attention(struct acpiphp_attention_info *info); |
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int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun); |
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void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot); |
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int acpiphp_enable_slot(struct acpiphp_slot *slot); |
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int acpiphp_disable_slot(struct acpiphp_slot *slot); |
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u8 acpiphp_get_power_status(struct acpiphp_slot *slot); |
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u8 acpiphp_get_attention_status(struct acpiphp_slot *slot); |
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u8 acpiphp_get_latch_status(struct acpiphp_slot *slot); |
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u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot); |
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/* variables */ |
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extern bool acpiphp_disabled; |
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#endif /* _ACPIPHP_H */
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