diff options
Diffstat (limited to 'drivers/acpi/acpica/exmutex.c')
| -rw-r--r-- | drivers/acpi/acpica/exmutex.c | 122 |
1 files changed, 63 insertions, 59 deletions
diff --git a/drivers/acpi/acpica/exmutex.c b/drivers/acpi/acpica/exmutex.c index 7be0205ad067..1fa013197fcf 100644 --- a/drivers/acpi/acpica/exmutex.c +++ b/drivers/acpi/acpica/exmutex.c @@ -1,46 +1,12 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: exmutex - ASL Mutex Acquire/Release functions * + * Copyright (C) 2000 - 2025, Intel Corp. + * *****************************************************************************/ -/* - * Copyright (C) 2000 - 2013, 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. - */ - #include <acpi/acpi.h> #include "accommon.h" #include "acinterp.h" @@ -185,8 +151,9 @@ acpi_ex_acquire_mutex_object(u16 timeout, if (obj_desc == acpi_gbl_global_lock_mutex) { status = acpi_ev_acquire_global_lock(timeout); } else { - status = acpi_ex_system_wait_mutex(obj_desc->mutex.os_mutex, - timeout); + status = + acpi_ex_system_wait_mutex(obj_desc->mutex.os_mutex, + timeout); } if (ACPI_FAILURE(status)) { @@ -243,20 +210,30 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc, } /* - * Current sync level must be less than or equal to the sync level of the - * mutex. This mechanism provides some deadlock prevention + * Current sync level must be less than or equal to the sync level + * of the mutex. This mechanism provides some deadlock prevention. */ if (walk_state->thread->current_sync_level > obj_desc->mutex.sync_level) { ACPI_ERROR((AE_INFO, - "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%u)", + "Cannot acquire Mutex [%4.4s], " + "current SyncLevel is too large (%u)", acpi_ut_get_node_name(obj_desc->mutex.node), walk_state->thread->current_sync_level)); return_ACPI_STATUS(AE_AML_MUTEX_ORDER); } - status = acpi_ex_acquire_mutex_object((u16) time_desc->integer.value, + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Acquiring: Mutex SyncLevel %u, Thread SyncLevel %u, " + "Depth %u TID %p\n", + obj_desc->mutex.sync_level, + walk_state->thread->current_sync_level, + obj_desc->mutex.acquisition_depth, + walk_state->thread)); + + status = acpi_ex_acquire_mutex_object((u16)time_desc->integer.value, obj_desc, walk_state->thread->thread_id); + if (ACPI_SUCCESS(status) && obj_desc->mutex.acquisition_depth == 1) { /* Save Thread object, original/current sync levels */ @@ -272,6 +249,12 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc, acpi_ex_link_mutex(obj_desc, walk_state->thread); } + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Acquired: Mutex SyncLevel %u, Thread SyncLevel %u, Depth %u\n", + obj_desc->mutex.sync_level, + walk_state->thread->current_sync_level, + obj_desc->mutex.acquisition_depth)); + return_ACPI_STATUS(status); } @@ -356,9 +339,9 @@ acpi_status acpi_ex_release_mutex(union acpi_operand_object *obj_desc, struct acpi_walk_state *walk_state) { - acpi_status status = AE_OK; u8 previous_sync_level; struct acpi_thread_state *owner_thread; + acpi_status status = AE_OK; ACPI_FUNCTION_TRACE(ex_release_mutex); @@ -409,7 +392,8 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, */ if (obj_desc->mutex.sync_level != owner_thread->current_sync_level) { ACPI_ERROR((AE_INFO, - "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u", + "Cannot release Mutex [%4.4s], SyncLevel mismatch: " + "mutex %u current %u", acpi_ut_get_node_name(obj_desc->mutex.node), obj_desc->mutex.sync_level, walk_state->thread->current_sync_level)); @@ -424,6 +408,15 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, previous_sync_level = owner_thread->acquired_mutex_list->mutex.original_sync_level; + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Releasing: Object SyncLevel %u, Thread SyncLevel %u, " + "Prev SyncLevel %u, Depth %u TID %p\n", + obj_desc->mutex.sync_level, + walk_state->thread->current_sync_level, + previous_sync_level, + obj_desc->mutex.acquisition_depth, + walk_state->thread)); + status = acpi_ex_release_mutex_object(obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); @@ -436,6 +429,14 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, owner_thread->current_sync_level = previous_sync_level; } + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Released: Object SyncLevel %u, Thread SyncLevel, %u, " + "Prev SyncLevel %u, Depth %u\n", + obj_desc->mutex.sync_level, + walk_state->thread->current_sync_level, + previous_sync_level, + obj_desc->mutex.acquisition_depth)); + return_ACPI_STATUS(status); } @@ -462,21 +463,17 @@ void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread) union acpi_operand_object *next = thread->acquired_mutex_list; union acpi_operand_object *obj_desc; - ACPI_FUNCTION_NAME(ex_release_all_mutexes); + ACPI_FUNCTION_TRACE(ex_release_all_mutexes); /* Traverse the list of owned mutexes, releasing each one */ while (next) { obj_desc = next; - next = obj_desc->mutex.next; - - obj_desc->mutex.prev = NULL; - obj_desc->mutex.next = NULL; - obj_desc->mutex.acquisition_depth = 0; - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, - "Force-releasing held mutex: %p\n", - obj_desc)); + "Mutex [%4.4s] force-release, SyncLevel %u Depth %u\n", + obj_desc->mutex.node->name.ascii, + obj_desc->mutex.sync_level, + obj_desc->mutex.acquisition_depth)); /* Release the mutex, special case for Global Lock */ @@ -489,14 +486,21 @@ void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread) acpi_os_release_mutex(obj_desc->mutex.os_mutex); } - /* Mark mutex unowned */ - - obj_desc->mutex.owner_thread = NULL; - obj_desc->mutex.thread_id = 0; - /* Update Thread sync_level (Last mutex is the important one) */ thread->current_sync_level = obj_desc->mutex.original_sync_level; + + /* Mark mutex unowned */ + + next = obj_desc->mutex.next; + + obj_desc->mutex.prev = NULL; + obj_desc->mutex.next = NULL; + obj_desc->mutex.acquisition_depth = 0; + obj_desc->mutex.owner_thread = NULL; + obj_desc->mutex.thread_id = 0; } + + return_VOID; } |