525 строки
14 KiB
C
525 строки
14 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: utxface - External interfaces, miscellaneous utility functions
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*
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* Copyright (C) 2000 - 2023, Intel Corp.
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*
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*****************************************************************************/
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#define EXPORT_ACPI_INTERFACES
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acdebug.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utxface")
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/*******************************************************************************
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*
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* FUNCTION: acpi_terminate
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
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*
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******************************************************************************/
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acpi_status ACPI_INIT_FUNCTION acpi_terminate(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_terminate);
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/* Shutdown and free all resources */
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acpi_ut_subsystem_shutdown();
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/* Free the mutex objects */
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acpi_ut_mutex_terminate();
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/* Now we can shutdown the OS-dependent layer */
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status = acpi_os_terminate();
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL_INIT(acpi_terminate)
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#ifndef ACPI_ASL_COMPILER
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#ifdef ACPI_FUTURE_USAGE
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/*******************************************************************************
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*
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* FUNCTION: acpi_subsystem_status
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*
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* PARAMETERS: None
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*
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* RETURN: Status of the ACPI subsystem
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*
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* DESCRIPTION: Other drivers that use the ACPI subsystem should call this
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* before making any other calls, to ensure the subsystem
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* initialized successfully.
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*
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******************************************************************************/
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acpi_status acpi_subsystem_status(void)
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{
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if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
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return (AE_OK);
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} else {
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return (AE_ERROR);
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}
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}
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ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_system_info
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*
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* PARAMETERS: out_buffer - A buffer to receive the resources for the
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* device
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*
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* RETURN: status - the status of the call
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*
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* DESCRIPTION: This function is called to get information about the current
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* state of the ACPI subsystem. It will return system information
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* in the out_buffer.
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*
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* If the function fails an appropriate status will be returned
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* and the value of out_buffer is undefined.
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*
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******************************************************************************/
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acpi_status acpi_get_system_info(struct acpi_buffer *out_buffer)
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{
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struct acpi_system_info *info_ptr;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_get_system_info);
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/* Parameter validation */
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status = acpi_ut_validate_buffer(out_buffer);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Validate/Allocate/Clear caller buffer */
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status =
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acpi_ut_initialize_buffer(out_buffer,
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sizeof(struct acpi_system_info));
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* Populate the return buffer
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*/
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info_ptr = (struct acpi_system_info *)out_buffer->pointer;
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info_ptr->acpi_ca_version = ACPI_CA_VERSION;
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/* System flags (ACPI capabilities) */
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info_ptr->flags = ACPI_SYS_MODE_ACPI;
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/* Timer resolution - 24 or 32 bits */
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if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
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info_ptr->timer_resolution = 24;
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} else {
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info_ptr->timer_resolution = 32;
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}
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/* Clear the reserved fields */
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info_ptr->reserved1 = 0;
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info_ptr->reserved2 = 0;
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/* Current debug levels */
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info_ptr->debug_layer = acpi_dbg_layer;
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info_ptr->debug_level = acpi_dbg_level;
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_system_info)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_statistics
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*
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* PARAMETERS: stats - Where the statistics are returned
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*
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* RETURN: status - the status of the call
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*
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* DESCRIPTION: Get the contents of the various system counters
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*
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******************************************************************************/
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acpi_status acpi_get_statistics(struct acpi_statistics *stats)
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{
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ACPI_FUNCTION_TRACE(acpi_get_statistics);
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/* Parameter validation */
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if (!stats) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Various interrupt-based event counters */
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stats->sci_count = acpi_sci_count;
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stats->gpe_count = acpi_gpe_count;
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memcpy(stats->fixed_event_count, acpi_fixed_event_count,
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sizeof(acpi_fixed_event_count));
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/* Other counters */
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stats->method_count = acpi_method_count;
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_statistics)
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/*****************************************************************************
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*
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* FUNCTION: acpi_install_initialization_handler
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*
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* PARAMETERS: handler - Callback procedure
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* function - Not (currently) used, see below
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install an initialization handler
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*
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* TBD: When a second function is added, must save the Function also.
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*
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****************************************************************************/
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acpi_status
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acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
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{
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if (!handler) {
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return (AE_BAD_PARAMETER);
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}
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if (acpi_gbl_init_handler) {
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return (AE_ALREADY_EXISTS);
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}
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acpi_gbl_init_handler = handler;
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return (AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
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#endif
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/*****************************************************************************
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*
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* FUNCTION: acpi_purge_cached_objects
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Empty all caches (delete the cached objects)
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*
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****************************************************************************/
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acpi_status acpi_purge_cached_objects(void)
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{
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ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
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(void)acpi_os_purge_cache(acpi_gbl_state_cache);
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(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
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(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
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(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
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/*****************************************************************************
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*
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* FUNCTION: acpi_install_interface
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*
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* PARAMETERS: interface_name - The interface to install
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install an _OSI interface to the global list
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*
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****************************************************************************/
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acpi_status acpi_install_interface(acpi_string interface_name)
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{
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acpi_status status;
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struct acpi_interface_info *interface_info;
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/* Parameter validation */
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if (!interface_name || (strlen(interface_name) == 0)) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Check if the interface name is already in the global list */
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interface_info = acpi_ut_get_interface(interface_name);
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if (interface_info) {
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/*
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* The interface already exists in the list. This is OK if the
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* interface has been marked invalid -- just clear the bit.
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*/
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if (interface_info->flags & ACPI_OSI_INVALID) {
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interface_info->flags &= ~ACPI_OSI_INVALID;
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status = AE_OK;
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} else {
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status = AE_ALREADY_EXISTS;
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}
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} else {
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/* New interface name, install into the global list */
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status = acpi_ut_install_interface(interface_name);
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}
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_install_interface)
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/*****************************************************************************
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*
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* FUNCTION: acpi_remove_interface
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*
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* PARAMETERS: interface_name - The interface to remove
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove an _OSI interface from the global list
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*
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****************************************************************************/
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acpi_status acpi_remove_interface(acpi_string interface_name)
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{
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acpi_status status;
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/* Parameter validation */
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if (!interface_name || (strlen(interface_name) == 0)) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status = acpi_ut_remove_interface(interface_name);
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_remove_interface)
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/*****************************************************************************
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*
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* FUNCTION: acpi_install_interface_handler
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*
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* PARAMETERS: handler - The _OSI interface handler to install
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* NULL means "remove existing handler"
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
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* invoked during execution of the internal implementation of
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* _OSI. A NULL handler simply removes any existing handler.
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*
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****************************************************************************/
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acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
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{
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acpi_status status;
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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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if (handler && acpi_gbl_interface_handler) {
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status = AE_ALREADY_EXISTS;
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} else {
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acpi_gbl_interface_handler = handler;
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}
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
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/*****************************************************************************
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*
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* FUNCTION: acpi_update_interfaces
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*
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* PARAMETERS: action - Actions to be performed during the
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* update
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*
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* RETURN: Status
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*
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* DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
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* string or/and feature group strings.
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*
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****************************************************************************/
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acpi_status acpi_update_interfaces(u8 action)
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{
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acpi_status status;
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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status = acpi_ut_update_interfaces(action);
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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return (status);
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}
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/*****************************************************************************
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*
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* FUNCTION: acpi_check_address_range
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*
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* PARAMETERS: space_id - Address space ID
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* address - Start address
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* length - Length
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* warn - TRUE if warning on overlap desired
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*
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* RETURN: Count of the number of conflicts detected.
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*
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* DESCRIPTION: Check if the input address range overlaps any of the
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* ASL operation region address ranges.
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*
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****************************************************************************/
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u32
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acpi_check_address_range(acpi_adr_space_type space_id,
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acpi_physical_address address,
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acpi_size length, u8 warn)
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{
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u32 overlaps;
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acpi_status status;
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (0);
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}
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overlaps = acpi_ut_check_address_range(space_id, address,
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(u32)length, warn);
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (overlaps);
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}
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ACPI_EXPORT_SYMBOL(acpi_check_address_range)
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#endif /* !ACPI_ASL_COMPILER */
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/*******************************************************************************
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*
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* FUNCTION: acpi_decode_pld_buffer
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*
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* PARAMETERS: in_buffer - Buffer returned by _PLD method
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* length - Length of the in_buffer
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* return_buffer - Where the decode buffer is returned
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*
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* RETURN: Status and the decoded _PLD buffer. User must deallocate
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* the buffer via ACPI_FREE.
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*
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* DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
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* a local struct that is much more useful to an ACPI driver.
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*
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******************************************************************************/
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acpi_status
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acpi_decode_pld_buffer(u8 *in_buffer,
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acpi_size length, struct acpi_pld_info **return_buffer)
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{
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struct acpi_pld_info *pld_info;
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u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
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u32 dword;
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/* Parameter validation */
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if (!in_buffer || !return_buffer
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|| (length < ACPI_PLD_REV1_BUFFER_SIZE)) {
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return (AE_BAD_PARAMETER);
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}
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pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
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if (!pld_info) {
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return (AE_NO_MEMORY);
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}
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/* First 32-bit DWord */
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ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
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pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
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pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
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pld_info->red = ACPI_PLD_GET_RED(&dword);
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pld_info->green = ACPI_PLD_GET_GREEN(&dword);
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pld_info->blue = ACPI_PLD_GET_BLUE(&dword);
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/* Second 32-bit DWord */
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ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
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pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
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pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
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/* Third 32-bit DWord */
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ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
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pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
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pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
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pld_info->lid = ACPI_PLD_GET_LID(&dword);
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pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
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pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
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pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
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pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
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pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
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pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
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pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
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pld_info->bay = ACPI_PLD_GET_BAY(&dword);
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/* Fourth 32-bit DWord */
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ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
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pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
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pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
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pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
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pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
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pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
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pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
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pld_info->order = ACPI_PLD_GET_ORDER(&dword);
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if (length >= ACPI_PLD_REV2_BUFFER_SIZE) {
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/* Fifth 32-bit DWord (Revision 2 of _PLD) */
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ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
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pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
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pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
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}
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*return_buffer = pld_info;
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return (AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)
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