diff options
Diffstat (limited to 'drivers/pci/hotplug/acpiphp.h')
| -rw-r--r-- | drivers/pci/hotplug/acpiphp.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h new file mode 100644 index 000000000..1f8ab4377 --- /dev/null +++ b/drivers/pci/hotplug/acpiphp.h @@ -0,0 +1,188 @@ +/* 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 */ |