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linux-next/include/acpi/acpi_bus.h
Rafael J. Wysocki 7b1998116b ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node
Modify struct acpi_dev_node to contain a pointer to struct acpi_device
associated with the given device object (that is, its ACPI companion
device) instead of an ACPI handle corresponding to it.  Introduce two
new macros for manipulating that pointer in a CONFIG_ACPI-safe way,
ACPI_COMPANION() and ACPI_COMPANION_SET(), and rework the
ACPI_HANDLE() macro to take the above changes into account.
Drop the ACPI_HANDLE_SET() macro entirely and rework its users to
use ACPI_COMPANION_SET() instead.  For some of them who used to
pass the result of acpi_get_child() directly to ACPI_HANDLE_SET()
introduce a helper routine acpi_preset_companion() doing an
equivalent thing.

The main motivation for doing this is that there are things
represented by struct acpi_device objects that don't have valid
ACPI handles (so called fixed ACPI hardware features, such as
power and sleep buttons) and we would like to create platform
device objects for them and "glue" them to their ACPI companions
in the usual way (which currently is impossible due to the
lack of valid ACPI handles).  However, there are more reasons
why it may be useful.

First, struct acpi_device pointers allow of much better type checking
than void pointers which are ACPI handles, so it should be more
difficult to write buggy code using modified struct acpi_dev_node
and the new macros.  Second, the change should help to reduce (over
time) the number of places in which the result of ACPI_HANDLE() is
passed to acpi_bus_get_device() in order to obtain a pointer to the
struct acpi_device associated with the given "physical" device,
because now that pointer is returned by ACPI_COMPANION() directly.
Finally, the change should make it easier to write generic code that
will build both for CONFIG_ACPI set and unset without adding explicit
compiler directives to it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> # on Haswell
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com> # for ATA and SDIO part
2013-11-14 23:14:43 +01:00

527 lines
14 KiB
C

/*
* acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
*
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef __ACPI_BUS_H__
#define __ACPI_BUS_H__
#include <linux/device.h>
#include <acpi/acpi.h>
/* TBD: Make dynamic */
#define ACPI_MAX_HANDLES 10
struct acpi_handle_list {
u32 count;
acpi_handle handles[ACPI_MAX_HANDLES];
};
/* acpi_utils.h */
acpi_status
acpi_extract_package(union acpi_object *package,
struct acpi_buffer *format, struct acpi_buffer *buffer);
acpi_status
acpi_evaluate_integer(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments, unsigned long long *data);
acpi_status
acpi_evaluate_reference(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments,
struct acpi_handle_list *list);
acpi_status
acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
u32 status_code, struct acpi_buffer *status_buf);
acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
bool acpi_has_method(acpi_handle handle, char *name);
acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
u64 arg);
acpi_status acpi_evaluate_ej0(acpi_handle handle);
acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
bool acpi_ata_match(acpi_handle handle);
bool acpi_bay_match(acpi_handle handle);
bool acpi_dock_match(acpi_handle handle);
#ifdef CONFIG_ACPI
#include <linux/proc_fs.h>
#define ACPI_BUS_FILE_ROOT "acpi"
extern struct proc_dir_entry *acpi_root_dir;
enum acpi_bus_device_type {
ACPI_BUS_TYPE_DEVICE = 0,
ACPI_BUS_TYPE_POWER,
ACPI_BUS_TYPE_PROCESSOR,
ACPI_BUS_TYPE_THERMAL,
ACPI_BUS_TYPE_POWER_BUTTON,
ACPI_BUS_TYPE_SLEEP_BUTTON,
ACPI_BUS_DEVICE_TYPE_COUNT
};
struct acpi_driver;
struct acpi_device;
/*
* ACPI Scan Handler
* -----------------
*/
enum acpi_hotplug_mode {
AHM_GENERIC = 0,
AHM_CONTAINER,
AHM_COUNT
};
struct acpi_hotplug_profile {
struct kobject kobj;
bool enabled:1;
enum acpi_hotplug_mode mode;
};
static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
struct kobject *kobj)
{
return container_of(kobj, struct acpi_hotplug_profile, kobj);
}
struct acpi_scan_handler {
const struct acpi_device_id *ids;
struct list_head list_node;
int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
void (*detach)(struct acpi_device *dev);
struct acpi_hotplug_profile hotplug;
};
/*
* ACPI Driver
* -----------
*/
typedef int (*acpi_op_add) (struct acpi_device * device);
typedef int (*acpi_op_remove) (struct acpi_device * device);
typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
struct acpi_device_ops {
acpi_op_add add;
acpi_op_remove remove;
acpi_op_notify notify;
};
#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
struct acpi_driver {
char name[80];
char class[80];
const struct acpi_device_id *ids; /* Supported Hardware IDs */
unsigned int flags;
struct acpi_device_ops ops;
struct device_driver drv;
struct module *owner;
};
/*
* ACPI Device
* -----------
*/
/* Status (_STA) */
struct acpi_device_status {
u32 present:1;
u32 enabled:1;
u32 show_in_ui:1;
u32 functional:1;
u32 battery_present:1;
u32 reserved:27;
};
/* Flags */
struct acpi_device_flags {
u32 dynamic_status:1;
u32 removable:1;
u32 ejectable:1;
u32 power_manageable:1;
u32 match_driver:1;
u32 reserved:27;
};
/* File System */
struct acpi_device_dir {
struct proc_dir_entry *entry;
};
#define acpi_device_dir(d) ((d)->dir.entry)
/* Plug and Play */
typedef char acpi_bus_id[8];
typedef unsigned long acpi_bus_address;
typedef char acpi_device_name[40];
typedef char acpi_device_class[20];
struct acpi_hardware_id {
struct list_head list;
char *id;
};
struct acpi_pnp_type {
u32 hardware_id:1;
u32 bus_address:1;
u32 reserved:30;
};
struct acpi_device_pnp {
acpi_bus_id bus_id; /* Object name */
struct acpi_pnp_type type; /* ID type */
acpi_bus_address bus_address; /* _ADR */
char *unique_id; /* _UID */
struct list_head ids; /* _HID and _CIDs */
acpi_device_name device_name; /* Driver-determined */
acpi_device_class device_class; /* " */
union acpi_object *str_obj; /* unicode string for _STR method */
unsigned long sun; /* _SUN */
};
#define acpi_device_bid(d) ((d)->pnp.bus_id)
#define acpi_device_adr(d) ((d)->pnp.bus_address)
const char *acpi_device_hid(struct acpi_device *device);
#define acpi_device_name(d) ((d)->pnp.device_name)
#define acpi_device_class(d) ((d)->pnp.device_class)
/* Power Management */
struct acpi_device_power_flags {
u32 explicit_get:1; /* _PSC present? */
u32 power_resources:1; /* Power resources */
u32 inrush_current:1; /* Serialize Dx->D0 */
u32 power_removed:1; /* Optimize Dx->D0 */
u32 ignore_parent:1; /* Power is independent of parent power state */
u32 reserved:27;
};
struct acpi_device_power_state {
struct {
u8 valid:1;
u8 os_accessible:1;
u8 explicit_set:1; /* _PSx present? */
u8 reserved:6;
} flags;
int power; /* % Power (compared to D0) */
int latency; /* Dx->D0 time (microseconds) */
struct list_head resources; /* Power resources referenced */
};
struct acpi_device_power {
int state; /* Current state */
struct acpi_device_power_flags flags;
struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
};
/* Performance Management */
struct acpi_device_perf_flags {
u8 reserved:8;
};
struct acpi_device_perf_state {
struct {
u8 valid:1;
u8 reserved:7;
} flags;
u8 power; /* % Power (compared to P0) */
u8 performance; /* % Performance ( " ) */
int latency; /* Px->P0 time (microseconds) */
};
struct acpi_device_perf {
int state;
struct acpi_device_perf_flags flags;
int state_count;
struct acpi_device_perf_state *states;
};
/* Wakeup Management */
struct acpi_device_wakeup_flags {
u8 valid:1; /* Can successfully enable wakeup? */
u8 run_wake:1; /* Run-Wake GPE devices */
u8 notifier_present:1; /* Wake-up notify handler has been installed */
};
struct acpi_device_wakeup {
acpi_handle gpe_device;
u64 gpe_number;
u64 sleep_state;
struct list_head resources;
struct acpi_device_wakeup_flags flags;
int prepare_count;
};
struct acpi_device_physical_node {
unsigned int node_id;
struct list_head node;
struct device *dev;
bool put_online:1;
};
/* Device */
struct acpi_device {
int device_type;
acpi_handle handle; /* no handle for fixed hardware */
struct acpi_device *parent;
struct list_head children;
struct list_head node;
struct list_head wakeup_list;
struct acpi_device_status status;
struct acpi_device_flags flags;
struct acpi_device_pnp pnp;
struct acpi_device_power power;
struct acpi_device_wakeup wakeup;
struct acpi_device_perf performance;
struct acpi_device_dir dir;
struct acpi_scan_handler *handler;
struct acpi_driver *driver;
void *driver_data;
struct device dev;
unsigned int physical_node_count;
struct list_head physical_node_list;
struct mutex physical_node_lock;
void (*remove)(struct acpi_device *);
};
static inline void *acpi_driver_data(struct acpi_device *d)
{
return d->driver_data;
}
#define to_acpi_device(d) container_of(d, struct acpi_device, dev)
#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)
/* acpi_device.dev.bus == &acpi_bus_type */
extern struct bus_type acpi_bus_type;
/*
* Events
* ------
*/
struct acpi_bus_event {
struct list_head node;
acpi_device_class device_class;
acpi_bus_id bus_id;
u32 type;
u32 data;
};
extern struct kobject *acpi_kobj;
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
void acpi_bus_private_data_handler(acpi_handle, void *);
int acpi_bus_get_private_data(acpi_handle, void **);
extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
extern int register_acpi_notifier(struct notifier_block *);
extern int unregister_acpi_notifier(struct notifier_block *);
/*
* External Functions
*/
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
int acpi_bus_set_power(acpi_handle handle, int state);
const char *acpi_power_state_string(int state);
int acpi_device_get_power(struct acpi_device *device, int *state);
int acpi_device_set_power(struct acpi_device *device, int state);
int acpi_bus_init_power(struct acpi_device *device);
int acpi_device_fix_up_power(struct acpi_device *device);
int acpi_bus_update_power(acpi_handle handle, int *state_p);
bool acpi_bus_power_manageable(acpi_handle handle);
#ifdef CONFIG_PM
bool acpi_bus_can_wakeup(acpi_handle handle);
#else
static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
#endif
void acpi_scan_lock_acquire(void);
void acpi_scan_lock_release(void);
int acpi_scan_add_handler(struct acpi_scan_handler *handler);
int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
void acpi_bus_trim(struct acpi_device *start);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids);
int acpi_create_dir(struct acpi_device *);
void acpi_remove_dir(struct acpi_device *);
typedef void (*acpi_hp_callback)(void *data, u32 src);
acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src);
/**
* module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
* @__acpi_driver: acpi_driver struct
*
* Helper macro for ACPI drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
*/
#define module_acpi_driver(__acpi_driver) \
module_driver(__acpi_driver, acpi_bus_register_driver, \
acpi_bus_unregister_driver)
/*
* Bind physical devices with ACPI devices
*/
struct acpi_bus_type {
struct list_head list;
const char *name;
bool (*match)(struct device *dev);
int (*find_device) (struct device *, acpi_handle *);
void (*setup)(struct device *);
void (*cleanup)(struct device *);
};
int register_acpi_bus_type(struct acpi_bus_type *);
int unregister_acpi_bus_type(struct acpi_bus_type *);
struct acpi_pci_root {
struct acpi_device * device;
struct pci_bus *bus;
u16 segment;
struct resource secondary; /* downstream bus range */
u32 osc_support_set; /* _OSC state of support bits */
u32 osc_control_set; /* _OSC state of control bits */
phys_addr_t mcfg_addr;
};
/* helper */
acpi_handle acpi_find_child(acpi_handle, u64, bool);
static inline acpi_handle acpi_get_child(acpi_handle handle, u64 addr)
{
return acpi_find_child(handle, addr, false);
}
void acpi_preset_companion(struct device *dev, acpi_handle parent, u64 addr);
int acpi_is_root_bridge(acpi_handle);
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
int acpi_disable_wakeup_device_power(struct acpi_device *dev);
#ifdef CONFIG_PM
acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
acpi_notify_handler handler, void *context);
acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
acpi_notify_handler handler);
int acpi_pm_device_sleep_state(struct device *, int *, int);
#else
static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
acpi_notify_handler handler,
void *context)
{
return AE_SUPPORT;
}
static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
acpi_notify_handler handler)
{
return AE_SUPPORT;
}
static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
{
if (p)
*p = ACPI_STATE_D0;
return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
m : ACPI_STATE_D0;
}
#endif
#ifdef CONFIG_PM_RUNTIME
int __acpi_device_run_wake(struct acpi_device *, bool);
int acpi_pm_device_run_wake(struct device *, bool);
#else
static inline int __acpi_device_run_wake(struct acpi_device *adev, bool en)
{
return -ENODEV;
}
static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
{
return -ENODEV;
}
#endif
#ifdef CONFIG_PM_SLEEP
int __acpi_device_sleep_wake(struct acpi_device *, u32, bool);
int acpi_pm_device_sleep_wake(struct device *, bool);
#else
static inline int __acpi_device_sleep_wake(struct acpi_device *adev,
u32 target_state, bool enable)
{
return -ENODEV;
}
static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
return -ENODEV;
}
#endif
#ifdef CONFIG_ACPI_SLEEP
u32 acpi_target_system_state(void);
#else
static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
#endif
static inline bool acpi_device_power_manageable(struct acpi_device *adev)
{
return adev->flags.power_manageable;
}
static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
{
return adev->wakeup.flags.valid;
}
static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
{
return adev->power.states[ACPI_STATE_D3_COLD].flags.os_accessible;
}
#else /* CONFIG_ACPI */
static inline int register_acpi_bus_type(void *bus) { return 0; }
static inline int unregister_acpi_bus_type(void *bus) { return 0; }
#endif /* CONFIG_ACPI */
#endif /*__ACPI_BUS_H__*/