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kernel-ark/include/acpi/acpixf.h
Rafael J. Wysocki 9874647ba1 ACPI / ACPICA: Do not execute _PRW methods during initialization 
Currently, during initialization ACPICA walks the entire ACPI
namespace in search of any device objects with assciated _PRW
methods.  All of the _PRW methods found are executed in the process
to extract the GPE information returned by them, so that the GPEs in
question can be marked as "able to wakeup" (more precisely, the
ACPI_GPE_CAN_WAKE flag is set for them).  The only purpose of this
exercise is to avoid enabling the CAN_WAKE GPEs automatically, even
if there are _Lxx/_Exx methods associated with them.  However, it is
both costly and unnecessary, because the host OS has to execute the
_PRW methods anyway to check which devices can wake up the system
from sleep states.  Moreover, it then uses full information
returned by _PRW, including the GPE information, so it can take care
of disabling the GPEs if necessary.

Remove the code that walks the namespace and executes _PRW from
ACPICA and modify comments to reflect that change.  Make
acpi_bus_set_run_wake_flags() disable GPEs for wakeup devices
so that they don't cause spurious wakeup events to be signaled.
This not only reduces the complexity of the ACPICA initialization
code, but in some cases it should reduce the kernel boot time as
well.

Unfortunately, for this purpose we need a new ACPICA function,
acpi_gpe_can_wake(), to be called by the host OS in order to disable
the GPEs that can wake up the system and were previously enabled by
acpi_ev_initialize_gpe_block() or acpi_ev_update_gpes() (such a GPE
should be disabled only once, because the initialization code enables
it only once, but it may be pointed to by _PRW for multiple devices
and that's why the additional function is necessary).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-07-12 14:17:39 -04:00

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/******************************************************************************
*
* Name: acpixf.h - External interfaces to the ACPI subsystem
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2010, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#ifndef __ACXFACE_H__
#define __ACXFACE_H__
/* Current ACPICA subsystem version in YYYYMMDD format */
#define ACPI_CA_VERSION 0x20100702
#include "actypes.h"
#include "actbl.h"
extern u8 acpi_gbl_permanent_mmap;
/*
* Globals that are publically available, allowing for
* run time configuration
*/
extern u32 acpi_dbg_level;
extern u32 acpi_dbg_layer;
extern u8 acpi_gbl_enable_interpreter_slack;
extern u8 acpi_gbl_all_methods_serialized;
extern u8 acpi_gbl_create_osi_method;
extern u8 acpi_gbl_use_default_register_widths;
extern acpi_name acpi_gbl_trace_method_name;
extern u32 acpi_gbl_trace_flags;
extern u8 acpi_gbl_enable_aml_debug_object;
extern u8 acpi_gbl_copy_dsdt_locally;
extern u8 acpi_gbl_truncate_io_addresses;
extern u32 acpi_current_gpe_count;
extern struct acpi_table_fadt acpi_gbl_FADT;
extern u32 acpi_rsdt_forced;
/*
* Global interfaces
*/
acpi_status
acpi_initialize_tables(struct acpi_table_desc *initial_storage,
u32 initial_table_count, u8 allow_resize);
acpi_status __init acpi_initialize_subsystem(void);
acpi_status acpi_enable_subsystem(u32 flags);
acpi_status acpi_initialize_objects(u32 flags);
acpi_status acpi_terminate(void);
#ifdef ACPI_FUTURE_USAGE
acpi_status acpi_subsystem_status(void);
#endif
acpi_status acpi_enable(void);
acpi_status acpi_disable(void);
#ifdef ACPI_FUTURE_USAGE
acpi_status acpi_get_system_info(struct acpi_buffer *ret_buffer);
#endif
const char *acpi_format_exception(acpi_status exception);
acpi_status acpi_purge_cached_objects(void);
/*
* ACPI Memory management
*/
void *acpi_allocate(u32 size);
void *acpi_callocate(u32 size);
void acpi_free(void *address);
/*
* ACPI table manipulation interfaces
*/
acpi_status acpi_reallocate_root_table(void);
acpi_status acpi_find_root_pointer(acpi_size *rsdp_address);
acpi_status acpi_load_tables(void);
acpi_status acpi_load_table(struct acpi_table_header *table_ptr);
acpi_status acpi_unload_table_id(acpi_owner_id id);
acpi_status
acpi_get_table_header(acpi_string signature,
u32 instance,
struct acpi_table_header *out_table_header);
acpi_status
acpi_get_table_with_size(acpi_string signature,
u32 instance, struct acpi_table_header **out_table,
acpi_size *tbl_size);
acpi_status
acpi_get_table(acpi_string signature,
u32 instance, struct acpi_table_header **out_table);
acpi_status
acpi_get_table_by_index(u32 table_index,
struct acpi_table_header **out_table);
acpi_status
acpi_install_table_handler(acpi_tbl_handler handler, void *context);
acpi_status acpi_remove_table_handler(acpi_tbl_handler handler);
/*
* Namespace and name interfaces
*/
acpi_status
acpi_walk_namespace(acpi_object_type type,
acpi_handle start_object,
u32 max_depth,
acpi_walk_callback pre_order_visit,
acpi_walk_callback post_order_visit,
void *context, void **return_value);
acpi_status
acpi_get_devices(const char *HID,
acpi_walk_callback user_function,
void *context, void **return_value);
acpi_status
acpi_get_name(acpi_handle object,
u32 name_type, struct acpi_buffer *ret_path_ptr);
acpi_status
acpi_get_handle(acpi_handle parent,
acpi_string pathname, acpi_handle * ret_handle);
acpi_status
acpi_attach_data(acpi_handle object, acpi_object_handler handler, void *data);
acpi_status acpi_detach_data(acpi_handle object, acpi_object_handler handler);
acpi_status
acpi_get_data(acpi_handle object, acpi_object_handler handler, void **data);
acpi_status
acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags);
/*
* Object manipulation and enumeration
*/
acpi_status
acpi_evaluate_object(acpi_handle object,
acpi_string pathname,
struct acpi_object_list *parameter_objects,
struct acpi_buffer *return_object_buffer);
acpi_status
acpi_evaluate_object_typed(acpi_handle object,
acpi_string pathname,
struct acpi_object_list *external_params,
struct acpi_buffer *return_buffer,
acpi_object_type return_type);
acpi_status
acpi_get_object_info(acpi_handle object,
struct acpi_device_info **return_buffer);
acpi_status acpi_install_method(u8 *buffer);
acpi_status
acpi_get_next_object(acpi_object_type type,
acpi_handle parent,
acpi_handle child, acpi_handle * out_handle);
acpi_status acpi_get_type(acpi_handle object, acpi_object_type * out_type);
acpi_status acpi_get_id(acpi_handle object, acpi_owner_id * out_type);
acpi_status acpi_get_parent(acpi_handle object, acpi_handle * out_handle);
/*
* Handler interfaces
*/
acpi_status
acpi_install_initialization_handler(acpi_init_handler handler, u32 function);
acpi_status
acpi_install_fixed_event_handler(u32 acpi_event,
acpi_event_handler handler, void *context);
acpi_status
acpi_remove_fixed_event_handler(u32 acpi_event, acpi_event_handler handler);
acpi_status
acpi_install_notify_handler(acpi_handle device,
u32 handler_type,
acpi_notify_handler handler, void *context);
acpi_status
acpi_remove_notify_handler(acpi_handle device,
u32 handler_type, acpi_notify_handler handler);
acpi_status
acpi_install_address_space_handler(acpi_handle device,
acpi_adr_space_type space_id,
acpi_adr_space_handler handler,
acpi_adr_space_setup setup, void *context);
acpi_status
acpi_remove_address_space_handler(acpi_handle device,
acpi_adr_space_type space_id,
acpi_adr_space_handler handler);
acpi_status
acpi_install_gpe_handler(acpi_handle gpe_device,
u32 gpe_number,
u32 type, acpi_event_handler address, void *context);
acpi_status
acpi_remove_gpe_handler(acpi_handle gpe_device,
u32 gpe_number, acpi_event_handler address);
#ifdef ACPI_FUTURE_USAGE
acpi_status acpi_install_exception_handler(acpi_exception_handler handler);
#endif
/*
* Event interfaces
*/
acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle);
acpi_status acpi_release_global_lock(u32 handle);
acpi_status acpi_enable_event(u32 event, u32 flags);
acpi_status acpi_disable_event(u32 event, u32 flags);
acpi_status acpi_clear_event(u32 event);
acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status);
/*
* GPE Interfaces
*/
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number);
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number);
acpi_status acpi_gpe_can_wake(acpi_handle gpe_device, u32 gpe_number);
acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number);
acpi_status acpi_gpe_wakeup(acpi_handle gpe_device, u32 gpe_number, u8 action);
acpi_status
acpi_get_gpe_status(acpi_handle gpe_device,
u32 gpe_number, acpi_event_status *event_status);
acpi_status acpi_disable_all_gpes(void);
acpi_status acpi_enable_all_runtime_gpes(void);
acpi_status acpi_get_gpe_device(u32 gpe_index, acpi_handle *gpe_device);
acpi_status
acpi_install_gpe_block(acpi_handle gpe_device,
struct acpi_generic_address *gpe_block_address,
u32 register_count, u32 interrupt_number);
acpi_status acpi_remove_gpe_block(acpi_handle gpe_device);
/*
* Resource interfaces
*/
typedef
acpi_status(*acpi_walk_resource_callback) (struct acpi_resource * resource,
void *context);
acpi_status
acpi_get_vendor_resource(acpi_handle device,
char *name,
struct acpi_vendor_uuid *uuid,
struct acpi_buffer *ret_buffer);
acpi_status
acpi_get_current_resources(acpi_handle device, struct acpi_buffer *ret_buffer);
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_get_possible_resources(acpi_handle device, struct acpi_buffer *ret_buffer);
#endif
acpi_status
acpi_walk_resources(acpi_handle device,
char *name,
acpi_walk_resource_callback user_function, void *context);
acpi_status
acpi_set_current_resources(acpi_handle device, struct acpi_buffer *in_buffer);
acpi_status
acpi_get_irq_routing_table(acpi_handle device, struct acpi_buffer *ret_buffer);
acpi_status
acpi_resource_to_address64(struct acpi_resource *resource,
struct acpi_resource_address64 *out);
/*
* Hardware (ACPI device) interfaces
*/
acpi_status acpi_reset(void);
acpi_status acpi_read_bit_register(u32 register_id, u32 *return_value);
acpi_status acpi_write_bit_register(u32 register_id, u32 value);
acpi_status acpi_set_firmware_waking_vector(u32 physical_address);
#if ACPI_MACHINE_WIDTH == 64
acpi_status acpi_set_firmware_waking_vector64(u64 physical_address);
#endif
acpi_status acpi_read(u64 *value, struct acpi_generic_address *reg);
acpi_status acpi_write(u64 value, struct acpi_generic_address *reg);
acpi_status
acpi_get_sleep_type_data(u8 sleep_state, u8 * slp_typ_a, u8 * slp_typ_b);
acpi_status acpi_enter_sleep_state_prep(u8 sleep_state);
acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state);
acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void);
acpi_status acpi_leave_sleep_state_prep(u8 sleep_state);
acpi_status acpi_leave_sleep_state(u8 sleep_state);
/*
* Error/Warning output
*/
void ACPI_INTERNAL_VAR_XFACE
acpi_error(const char *module_name,
u32 line_number, const char *format, ...) ACPI_PRINTF_LIKE(3);
void ACPI_INTERNAL_VAR_XFACE
acpi_exception(const char *module_name,
u32 line_number,
acpi_status status, const char *format, ...) ACPI_PRINTF_LIKE(4);
void ACPI_INTERNAL_VAR_XFACE
acpi_warning(const char *module_name,
u32 line_number, const char *format, ...) ACPI_PRINTF_LIKE(3);
void ACPI_INTERNAL_VAR_XFACE
acpi_info(const char *module_name,
u32 line_number, const char *format, ...) ACPI_PRINTF_LIKE(3);
/*
* Debug output
*/
#ifdef ACPI_DEBUG_OUTPUT
void ACPI_INTERNAL_VAR_XFACE
acpi_debug_print(u32 requested_debug_level,
u32 line_number,
const char *function_name,
const char *module_name,
u32 component_id, const char *format, ...) ACPI_PRINTF_LIKE(6);
void ACPI_INTERNAL_VAR_XFACE
acpi_debug_print_raw(u32 requested_debug_level,
u32 line_number,
const char *function_name,
const char *module_name,
u32 component_id,
const char *format, ...) ACPI_PRINTF_LIKE(6);
#endif
#endif /* __ACXFACE_H__ */
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