forked from luck/tmp_suning_uos_patched
bda663d36b
Fixed a problem within the Resource Manager where support for the Generic Register descriptor was not fully implemented. This descriptor is now fully recognized, parsed, disassembled, and displayed. Restructured the Resource Manager code to utilize table-driven dispatch and lookup, eliminating many of the large switch() statements. This reduces overall subsystem code size and code complexity. Affects the resource parsing and construction, disassembly, and debug dump output. Cleaned up and restructured the debug dump output for all resource descriptors. Improved readability of the output and reduced code size. Fixed a problem where changes to internal data structures caused the optional ACPI_MUTEX_DEBUG code to fail compilation if specified. Signed-off-by: Robert Moore <Robert.Moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
355 lines
9.7 KiB
C
355 lines
9.7 KiB
C
/*******************************************************************************
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*
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* Module Name: utmutex - local mutex support
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utmutex")
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/* Local prototypes */
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static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id);
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static acpi_status acpi_ut_delete_mutex(acpi_mutex_handle mutex_id);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_mutex_initialize
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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: Create the system mutex objects.
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*
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******************************************************************************/
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acpi_status acpi_ut_mutex_initialize(void)
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{
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u32 i;
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acpi_status status;
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ACPI_FUNCTION_TRACE("ut_mutex_initialize");
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/*
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* Create each of the predefined mutex objects
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*/
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for (i = 0; i < NUM_MUTEX; i++) {
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status = acpi_ut_create_mutex(i);
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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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status = acpi_os_create_lock(&acpi_gbl_gpe_lock);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_mutex_terminate
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*
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* PARAMETERS: None.
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete all of the system mutex objects.
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*
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******************************************************************************/
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void acpi_ut_mutex_terminate(void)
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{
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u32 i;
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ACPI_FUNCTION_TRACE("ut_mutex_terminate");
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/*
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* Delete each predefined mutex object
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*/
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for (i = 0; i < NUM_MUTEX; i++) {
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(void)acpi_ut_delete_mutex(i);
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}
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acpi_os_delete_lock(acpi_gbl_gpe_lock);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_mutex
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*
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* PARAMETERS: mutex_iD - ID of the mutex to be created
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a mutex object.
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*
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******************************************************************************/
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static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE_U32("ut_create_mutex", mutex_id);
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if (mutex_id > MAX_MUTEX) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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if (!acpi_gbl_mutex_info[mutex_id].mutex) {
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status = acpi_os_create_semaphore(1, 1,
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&acpi_gbl_mutex_info
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[mutex_id].mutex);
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acpi_gbl_mutex_info[mutex_id].thread_id =
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ACPI_MUTEX_NOT_ACQUIRED;
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acpi_gbl_mutex_info[mutex_id].use_count = 0;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_mutex
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*
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* PARAMETERS: mutex_iD - ID of the mutex to be deleted
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*
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* RETURN: Status
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*
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* DESCRIPTION: Delete a mutex object.
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*
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******************************************************************************/
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static acpi_status acpi_ut_delete_mutex(acpi_mutex_handle mutex_id)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE_U32("ut_delete_mutex", mutex_id);
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if (mutex_id > MAX_MUTEX) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_os_delete_semaphore(acpi_gbl_mutex_info[mutex_id].mutex);
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acpi_gbl_mutex_info[mutex_id].mutex = NULL;
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acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_acquire_mutex
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*
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* PARAMETERS: mutex_iD - ID of the mutex to be acquired
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*
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* RETURN: Status
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*
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* DESCRIPTION: Acquire a mutex object.
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*
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******************************************************************************/
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acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
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{
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acpi_status status;
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u32 this_thread_id;
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ACPI_FUNCTION_NAME("ut_acquire_mutex");
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if (mutex_id > MAX_MUTEX) {
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return (AE_BAD_PARAMETER);
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}
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this_thread_id = acpi_os_get_thread_id();
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#ifdef ACPI_MUTEX_DEBUG
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{
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u32 i;
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/*
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* Mutex debug code, for internal debugging only.
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*
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* Deadlock prevention. Check if this thread owns any mutexes of value
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* greater than or equal to this one. If so, the thread has violated
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* the mutex ordering rule. This indicates a coding error somewhere in
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* the ACPI subsystem code.
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*/
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for (i = mutex_id; i < MAX_MUTEX; i++) {
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if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) {
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if (i == mutex_id) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Mutex [%s] already acquired by this thread [%X]\n",
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acpi_ut_get_mutex_name
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(mutex_id),
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this_thread_id));
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return (AE_ALREADY_ACQUIRED);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Invalid acquire order: Thread %X owns [%s], wants [%s]\n",
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this_thread_id,
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acpi_ut_get_mutex_name(i),
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acpi_ut_get_mutex_name
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(mutex_id)));
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return (AE_ACQUIRE_DEADLOCK);
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}
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}
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}
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#endif
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ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
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"Thread %X attempting to acquire Mutex [%s]\n",
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this_thread_id, acpi_ut_get_mutex_name(mutex_id)));
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status = acpi_os_wait_semaphore(acpi_gbl_mutex_info[mutex_id].mutex,
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1, ACPI_WAIT_FOREVER);
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if (ACPI_SUCCESS(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
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"Thread %X acquired Mutex [%s]\n",
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this_thread_id,
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acpi_ut_get_mutex_name(mutex_id)));
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acpi_gbl_mutex_info[mutex_id].use_count++;
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acpi_gbl_mutex_info[mutex_id].thread_id = this_thread_id;
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Thread %X could not acquire Mutex [%s] %s\n",
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this_thread_id,
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acpi_ut_get_mutex_name(mutex_id),
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acpi_format_exception(status)));
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}
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_release_mutex
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*
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* PARAMETERS: mutex_iD - ID of the mutex to be released
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*
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* RETURN: Status
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*
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* DESCRIPTION: Release a mutex object.
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*
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******************************************************************************/
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acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
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{
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acpi_status status;
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u32 this_thread_id;
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ACPI_FUNCTION_NAME("ut_release_mutex");
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this_thread_id = acpi_os_get_thread_id();
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ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
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"Thread %X releasing Mutex [%s]\n", this_thread_id,
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acpi_ut_get_mutex_name(mutex_id)));
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if (mutex_id > MAX_MUTEX) {
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return (AE_BAD_PARAMETER);
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}
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/*
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* Mutex must be acquired in order to release it!
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*/
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if (acpi_gbl_mutex_info[mutex_id].thread_id == ACPI_MUTEX_NOT_ACQUIRED) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Mutex [%s] is not acquired, cannot release\n",
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acpi_ut_get_mutex_name(mutex_id)));
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return (AE_NOT_ACQUIRED);
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}
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#ifdef ACPI_MUTEX_DEBUG
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{
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u32 i;
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/*
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* Mutex debug code, for internal debugging only.
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*
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* Deadlock prevention. Check if this thread owns any mutexes of value
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* greater than this one. If so, the thread has violated the mutex
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* ordering rule. This indicates a coding error somewhere in
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* the ACPI subsystem code.
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*/
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for (i = mutex_id; i < MAX_MUTEX; i++) {
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if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) {
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if (i == mutex_id) {
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continue;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Invalid release order: owns [%s], releasing [%s]\n",
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acpi_ut_get_mutex_name(i),
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acpi_ut_get_mutex_name
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(mutex_id)));
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return (AE_RELEASE_DEADLOCK);
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}
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}
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}
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#endif
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/* Mark unlocked FIRST */
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acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
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status =
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acpi_os_signal_semaphore(acpi_gbl_mutex_info[mutex_id].mutex, 1);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Thread %X could not release Mutex [%s] %s\n",
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this_thread_id,
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acpi_ut_get_mutex_name(mutex_id),
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acpi_format_exception(status)));
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
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"Thread %X released Mutex [%s]\n",
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this_thread_id,
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acpi_ut_get_mutex_name(mutex_id)));
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}
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return (status);
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}
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