^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Module Name: exmutex - ASL Mutex Acquire/Release functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2000 - 2020, Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <acpi/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "accommon.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "acinterp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "acevents.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define _COMPONENT ACPI_EXECUTER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) ACPI_MODULE_NAME("exmutex")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /* Local prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) acpi_ex_link_mutex(union acpi_operand_object *obj_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct acpi_thread_state *thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * FUNCTION: acpi_ex_unlink_mutex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * PARAMETERS: obj_desc - The mutex to be unlinked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * DESCRIPTION: Remove a mutex from the "AcquiredMutex" list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct acpi_thread_state *thread = obj_desc->mutex.owner_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (!thread) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* Doubly linked list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (obj_desc->mutex.next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) (obj_desc->mutex.next)->mutex.prev = obj_desc->mutex.prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (obj_desc->mutex.prev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) (obj_desc->mutex.prev)->mutex.next = obj_desc->mutex.next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * Migrate the previous sync level associated with this mutex to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * the previous mutex on the list so that it may be preserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * This handles the case where several mutexes have been acquired
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * at the same level, but are not released in opposite order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) (obj_desc->mutex.prev)->mutex.original_sync_level =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) obj_desc->mutex.original_sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) thread->acquired_mutex_list = obj_desc->mutex.next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * FUNCTION: acpi_ex_link_mutex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * PARAMETERS: obj_desc - The mutex to be linked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * thread - Current executing thread object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * DESCRIPTION: Add a mutex to the "AcquiredMutex" list for this walk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) acpi_ex_link_mutex(union acpi_operand_object *obj_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct acpi_thread_state *thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) union acpi_operand_object *list_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) list_head = thread->acquired_mutex_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /* This object will be the first object in the list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) obj_desc->mutex.prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) obj_desc->mutex.next = list_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* Update old first object to point back to this object */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (list_head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) list_head->mutex.prev = obj_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* Update list head */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) thread->acquired_mutex_list = obj_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * FUNCTION: acpi_ex_acquire_mutex_object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * PARAMETERS: timeout - Timeout in milliseconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * obj_desc - Mutex object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * thread_id - Current thread state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * RETURN: Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * DESCRIPTION: Acquire an AML mutex, low-level interface. Provides a common
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * path that supports multiple acquires by the same thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * MUTEX: Interpreter must be locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * NOTE: This interface is called from three places:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * 1) From acpi_ex_acquire_mutex, via an AML Acquire() operator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * 2) From acpi_ex_acquire_global_lock when an AML Field access requires the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * global lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * 3) From the external interface, acpi_acquire_global_lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) acpi_ex_acquire_mutex_object(u16 timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) union acpi_operand_object *obj_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) acpi_thread_id thread_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ACPI_FUNCTION_TRACE_PTR(ex_acquire_mutex_object, obj_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!obj_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return_ACPI_STATUS(AE_BAD_PARAMETER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* Support for multiple acquires by the owning thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (obj_desc->mutex.thread_id == thread_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * The mutex is already owned by this thread, just increment the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * acquisition depth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) obj_desc->mutex.acquisition_depth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return_ACPI_STATUS(AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* Acquire the mutex, wait if necessary. Special case for Global Lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (obj_desc == acpi_gbl_global_lock_mutex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) status = acpi_ev_acquire_global_lock(timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) status =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) acpi_ex_system_wait_mutex(obj_desc->mutex.os_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) /* Includes failure from a timeout on time_desc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return_ACPI_STATUS(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* Acquired the mutex: update mutex object */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) obj_desc->mutex.thread_id = thread_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) obj_desc->mutex.acquisition_depth = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) obj_desc->mutex.original_sync_level = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) obj_desc->mutex.owner_thread = NULL; /* Used only for AML Acquire() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return_ACPI_STATUS(AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * FUNCTION: acpi_ex_acquire_mutex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * PARAMETERS: time_desc - Timeout integer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * obj_desc - Mutex object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * walk_state - Current method execution state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * RETURN: Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * DESCRIPTION: Acquire an AML mutex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) union acpi_operand_object *obj_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct acpi_walk_state *walk_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ACPI_FUNCTION_TRACE_PTR(ex_acquire_mutex, obj_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (!obj_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return_ACPI_STATUS(AE_BAD_PARAMETER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /* Must have a valid thread state struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!walk_state->thread) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) "Cannot acquire Mutex [%4.4s], null thread info",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) acpi_ut_get_node_name(obj_desc->mutex.node)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return_ACPI_STATUS(AE_AML_INTERNAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * Current sync level must be less than or equal to the sync level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * of the mutex. This mechanism provides some deadlock prevention.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (walk_state->thread->current_sync_level > obj_desc->mutex.sync_level) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) "Cannot acquire Mutex [%4.4s], "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) "current SyncLevel is too large (%u)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) acpi_ut_get_node_name(obj_desc->mutex.node),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) walk_state->thread->current_sync_level));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) "Acquiring: Mutex SyncLevel %u, Thread SyncLevel %u, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) "Depth %u TID %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) obj_desc->mutex.sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) walk_state->thread->current_sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) obj_desc->mutex.acquisition_depth,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) walk_state->thread));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) status = acpi_ex_acquire_mutex_object((u16)time_desc->integer.value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) obj_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) walk_state->thread->thread_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (ACPI_SUCCESS(status) && obj_desc->mutex.acquisition_depth == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /* Save Thread object, original/current sync levels */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) obj_desc->mutex.owner_thread = walk_state->thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) obj_desc->mutex.original_sync_level =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) walk_state->thread->current_sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) walk_state->thread->current_sync_level =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) obj_desc->mutex.sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /* Link the mutex to the current thread for force-unlock at method exit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) acpi_ex_link_mutex(obj_desc, walk_state->thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) "Acquired: Mutex SyncLevel %u, Thread SyncLevel %u, Depth %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) obj_desc->mutex.sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) walk_state->thread->current_sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) obj_desc->mutex.acquisition_depth));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return_ACPI_STATUS(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * FUNCTION: acpi_ex_release_mutex_object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * PARAMETERS: obj_desc - The object descriptor for this op
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * RETURN: Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * DESCRIPTION: Release a previously acquired Mutex, low level interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * Provides a common path that supports multiple releases (after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * previous multiple acquires) by the same thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * MUTEX: Interpreter must be locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * NOTE: This interface is called from three places:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * 1) From acpi_ex_release_mutex, via an AML Acquire() operator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * 2) From acpi_ex_release_global_lock when an AML Field access requires the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * global lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * 3) From the external interface, acpi_release_global_lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) acpi_status acpi_ex_release_mutex_object(union acpi_operand_object *obj_desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) acpi_status status = AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) ACPI_FUNCTION_TRACE(ex_release_mutex_object);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (obj_desc->mutex.acquisition_depth == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return_ACPI_STATUS(AE_NOT_ACQUIRED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) /* Match multiple Acquires with multiple Releases */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) obj_desc->mutex.acquisition_depth--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (obj_desc->mutex.acquisition_depth != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /* Just decrement the depth and return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return_ACPI_STATUS(AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (obj_desc->mutex.owner_thread) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* Unlink the mutex from the owner's list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) acpi_ex_unlink_mutex(obj_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) obj_desc->mutex.owner_thread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* Release the mutex, special case for Global Lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (obj_desc == acpi_gbl_global_lock_mutex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) status = acpi_ev_release_global_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) acpi_os_release_mutex(obj_desc->mutex.os_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /* Clear mutex info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) obj_desc->mutex.thread_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return_ACPI_STATUS(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * FUNCTION: acpi_ex_release_mutex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * PARAMETERS: obj_desc - The object descriptor for this op
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * walk_state - Current method execution state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * RETURN: Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * DESCRIPTION: Release a previously acquired Mutex.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct acpi_walk_state *walk_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) u8 previous_sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct acpi_thread_state *owner_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) acpi_status status = AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) ACPI_FUNCTION_TRACE(ex_release_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (!obj_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return_ACPI_STATUS(AE_BAD_PARAMETER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) owner_thread = obj_desc->mutex.owner_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) /* The mutex must have been previously acquired in order to release it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (!owner_thread) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) "Cannot release Mutex [%4.4s], not acquired",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) acpi_ut_get_node_name(obj_desc->mutex.node)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return_ACPI_STATUS(AE_AML_MUTEX_NOT_ACQUIRED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /* Must have a valid thread ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (!walk_state->thread) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) "Cannot release Mutex [%4.4s], null thread info",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) acpi_ut_get_node_name(obj_desc->mutex.node)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return_ACPI_STATUS(AE_AML_INTERNAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * The Mutex is owned, but this thread must be the owner.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * Special case for Global Lock, any thread can release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if ((owner_thread->thread_id != walk_state->thread->thread_id) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) (obj_desc != acpi_gbl_global_lock_mutex)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) "Thread %u cannot release Mutex [%4.4s] acquired by thread %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) (u32)walk_state->thread->thread_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) acpi_ut_get_node_name(obj_desc->mutex.node),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) (u32)owner_thread->thread_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return_ACPI_STATUS(AE_AML_NOT_OWNER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * The sync level of the mutex must be equal to the current sync level. In
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * other words, the current level means that at least one mutex at that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * level is currently being held. Attempting to release a mutex of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * different level can only mean that the mutex ordering rule is being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * violated. This behavior is clarified in ACPI 4.0 specification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (obj_desc->mutex.sync_level != owner_thread->current_sync_level) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) "Cannot release Mutex [%4.4s], SyncLevel mismatch: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) "mutex %u current %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) acpi_ut_get_node_name(obj_desc->mutex.node),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) obj_desc->mutex.sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) walk_state->thread->current_sync_level));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * Get the previous sync_level from the head of the acquired mutex list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * This handles the case where several mutexes at the same level have been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * acquired, but are not released in reverse order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) previous_sync_level =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) owner_thread->acquired_mutex_list->mutex.original_sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) "Releasing: Object SyncLevel %u, Thread SyncLevel %u, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) "Prev SyncLevel %u, Depth %u TID %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) obj_desc->mutex.sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) walk_state->thread->current_sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) previous_sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) obj_desc->mutex.acquisition_depth,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) walk_state->thread));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) status = acpi_ex_release_mutex_object(obj_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return_ACPI_STATUS(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (obj_desc->mutex.acquisition_depth == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /* Restore the previous sync_level */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) owner_thread->current_sync_level = previous_sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) "Released: Object SyncLevel %u, Thread SyncLevel, %u, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) "Prev SyncLevel %u, Depth %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) obj_desc->mutex.sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) walk_state->thread->current_sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) previous_sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) obj_desc->mutex.acquisition_depth));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return_ACPI_STATUS(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * FUNCTION: acpi_ex_release_all_mutexes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * PARAMETERS: thread - Current executing thread object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * RETURN: Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * DESCRIPTION: Release all mutexes held by this thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * NOTE: This function is called as the thread is exiting the interpreter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * Mutexes are not released when an individual control method is exited, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * only when the parent thread actually exits the interpreter. This allows one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * method to acquire a mutex, and a different method to release it, as long as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * this is performed underneath a single parent control method.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) union acpi_operand_object *next = thread->acquired_mutex_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) union acpi_operand_object *obj_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) ACPI_FUNCTION_TRACE(ex_release_all_mutexes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) /* Traverse the list of owned mutexes, releasing each one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) obj_desc = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) "Mutex [%4.4s] force-release, SyncLevel %u Depth %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) obj_desc->mutex.node->name.ascii,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) obj_desc->mutex.sync_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) obj_desc->mutex.acquisition_depth));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) /* Release the mutex, special case for Global Lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (obj_desc == acpi_gbl_global_lock_mutex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /* Ignore errors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) (void)acpi_ev_release_global_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) acpi_os_release_mutex(obj_desc->mutex.os_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /* Update Thread sync_level (Last mutex is the important one) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) thread->current_sync_level =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) obj_desc->mutex.original_sync_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) /* Mark mutex unowned */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) next = obj_desc->mutex.next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) obj_desc->mutex.prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) obj_desc->mutex.next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) obj_desc->mutex.acquisition_depth = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) obj_desc->mutex.owner_thread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) obj_desc->mutex.thread_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) return_VOID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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