acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
{
acpi_thread_id this_thread_id;
ACPI_FUNCTION_NAME(ut_release_mutex);
this_thread_id = acpi_os_get_thread_id();
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"Thread %X releasing Mutex [%s]\n", (u32) this_thread_id,
acpi_ut_get_mutex_name(mutex_id)));
if (mutex_id > ACPI_MAX_MUTEX) {
return (AE_BAD_PARAMETER);
}
/*
* Mutex must be acquired in order to release it!
*/
if (acpi_gbl_mutex_info[mutex_id].thread_id == ACPI_MUTEX_NOT_ACQUIRED) {
ACPI_ERROR((AE_INFO,
"Mutex [%X] is not acquired, cannot release",
mutex_id));
return (AE_NOT_ACQUIRED);
}
#ifdef ACPI_MUTEX_DEBUG
{
u32 i;
/*
* Mutex debug code, for internal debugging only.
*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than this one. If so, the thread has violated the mutex
* ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < ACPI_MAX_MUTEX; i++) {
if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) {
if (i == mutex_id) {
continue;
}
ACPI_ERROR((AE_INFO,
"Invalid release order: owns [%s], releasing [%s]",
acpi_ut_get_mutex_name(i),
acpi_ut_get_mutex_name(mutex_id)));
return (AE_RELEASE_DEADLOCK);
}
}
}
#endif
/* Mark unlocked FIRST */
acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
acpi_os_release_mutex(acpi_gbl_mutex_info[mutex_id].mutex);
return (AE_OK);
}
void acpi_db_display_locks(void)
{
u32 i;
for (i = 0; i < ACPI_MAX_MUTEX; i++) {
acpi_os_printf("%26s : %s\n", acpi_ut_get_mutex_name(i),
acpi_gbl_mutex_info[i].thread_id ==
ACPI_MUTEX_NOT_ACQUIRED ? "Locked" : "Unlocked");
}
}
acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
{
acpi_status status;
acpi_thread_id this_thread_id;
ACPI_FUNCTION_NAME(ut_acquire_mutex);
if (mutex_id > ACPI_MAX_MUTEX) {
return (AE_BAD_PARAMETER);
}
this_thread_id = acpi_os_get_thread_id();
#ifdef ACPI_MUTEX_DEBUG
{
u32 i;
/*
* Mutex debug code, for internal debugging only.
*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than or equal to this one. If so, the thread has violated
* the mutex ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < ACPI_NUM_MUTEX; i++) {
if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) {
if (i == mutex_id) {
ACPI_ERROR((AE_INFO,
"Mutex [%s] already acquired by this thread [%p]",
acpi_ut_get_mutex_name
(mutex_id),
ACPI_CAST_PTR(void,
this_thread_id)));
return (AE_ALREADY_ACQUIRED);
}
ACPI_ERROR((AE_INFO,
"Invalid acquire order: Thread %p owns [%s], wants [%s]",
ACPI_CAST_PTR(void, this_thread_id),
acpi_ut_get_mutex_name(i),
acpi_ut_get_mutex_name(mutex_id)));
return (AE_ACQUIRE_DEADLOCK);
}
}
}
acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
{
acpi_status status;
acpi_thread_id this_thread_id;
ACPI_FUNCTION_NAME(ut_acquire_mutex);
if (mutex_id > ACPI_MAX_MUTEX) {
return (AE_BAD_PARAMETER);
}
this_thread_id = acpi_os_get_thread_id();
#ifdef ACPI_MUTEX_DEBUG
{
u32 i;
/*
* Mutex debug code, for internal debugging only.
*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than or equal to this one. If so, the thread has violated
* the mutex ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < ACPI_NUM_MUTEX; i++) {
if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) {
if (i == mutex_id) {
ACPI_ERROR((AE_INFO,
"Mutex [%s] already acquired by this thread [%u]",
acpi_ut_get_mutex_name
(mutex_id),
(u32)this_thread_id));
return (AE_ALREADY_ACQUIRED);
}
ACPI_ERROR((AE_INFO,
"Invalid acquire order: Thread %u owns [%s], wants [%s]",
(u32)this_thread_id,
acpi_ut_get_mutex_name(i),
acpi_ut_get_mutex_name(mutex_id)));
return (AE_ACQUIRE_DEADLOCK);
}
}
}
#endif
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"Thread %u attempting to acquire Mutex [%s]\n",
(u32)this_thread_id,
acpi_ut_get_mutex_name(mutex_id)));
status = acpi_os_acquire_mutex(acpi_gbl_mutex_info[mutex_id].mutex,
ACPI_WAIT_FOREVER);
if (ACPI_SUCCESS(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"Thread %u acquired Mutex [%s]\n",
(u32)this_thread_id,
acpi_ut_get_mutex_name(mutex_id)));
acpi_gbl_mutex_info[mutex_id].use_count++;
acpi_gbl_mutex_info[mutex_id].thread_id = this_thread_id;
} else {
ACPI_EXCEPTION((AE_INFO, status,
"Thread %u could not acquire Mutex [0x%X]",
(u32)this_thread_id, mutex_id));
}
return (status);
}
acpi_status acpi_db_display_statistics(char *type_arg)
{
u32 i;
u32 temp;
acpi_ut_strupr(type_arg);
temp = acpi_db_match_argument(type_arg, acpi_db_stat_types);
if (temp == ACPI_TYPE_NOT_FOUND) {
acpi_os_printf("Invalid or unsupported argument\n");
return (AE_OK);
}
switch (temp) {
case CMD_STAT_ALLOCATIONS:
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
acpi_ut_dump_allocation_info();
#endif
break;
case CMD_STAT_TABLES:
acpi_os_printf("ACPI Table Information (not implemented):\n\n");
break;
case CMD_STAT_OBJECTS:
acpi_db_count_namespace_objects();
acpi_os_printf
("\nObjects defined in the current namespace:\n\n");
acpi_os_printf("%16.16s %10.10s %10.10s\n",
"ACPI_TYPE", "NODES", "OBJECTS");
for (i = 0; i < ACPI_TYPE_NS_NODE_MAX; i++) {
acpi_os_printf("%16.16s % 10ld% 10ld\n",
acpi_ut_get_type_name(i),
acpi_gbl_node_type_count[i],
acpi_gbl_obj_type_count[i]);
}
acpi_os_printf("%16.16s % 10ld% 10ld\n", "Misc/Unknown",
acpi_gbl_node_type_count_misc,
acpi_gbl_obj_type_count_misc);
acpi_os_printf("%16.16s % 10ld% 10ld\n", "TOTALS:",
acpi_gbl_num_nodes, acpi_gbl_num_objects);
break;
case CMD_STAT_MEMORY:
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
acpi_os_printf
("\n----Object Statistics (all in hex)---------\n");
acpi_db_list_info(acpi_gbl_global_list);
acpi_db_list_info(acpi_gbl_ns_node_list);
#endif
#ifdef ACPI_USE_LOCAL_CACHE
acpi_os_printf
("\n----Cache Statistics (all in hex)---------\n");
acpi_db_list_info(acpi_gbl_operand_cache);
acpi_db_list_info(acpi_gbl_ps_node_cache);
acpi_db_list_info(acpi_gbl_ps_node_ext_cache);
acpi_db_list_info(acpi_gbl_state_cache);
#endif
break;
case CMD_STAT_MISC:
acpi_os_printf("\nMiscellaneous Statistics:\n\n");
acpi_os_printf("Calls to AcpiPsFind:.. ........% 7ld\n",
acpi_gbl_ps_find_count);
acpi_os_printf("Calls to AcpiNsLookup:..........% 7ld\n",
acpi_gbl_ns_lookup_count);
acpi_os_printf("\n");
acpi_os_printf("Mutex usage:\n\n");
for (i = 0; i < ACPI_NUM_MUTEX; i++) {
acpi_os_printf("%-28s: % 7ld\n",
acpi_ut_get_mutex_name(i),
acpi_gbl_mutex_info[i].use_count);
}
break;
case CMD_STAT_SIZES:
acpi_os_printf("\nInternal object sizes:\n\n");
acpi_os_printf("Common %3d\n",
sizeof(struct acpi_object_common));
acpi_os_printf("Number %3d\n",
sizeof(struct acpi_object_integer));
acpi_os_printf("String %3d\n",
sizeof(struct acpi_object_string));
acpi_os_printf("Buffer %3d\n",
sizeof(struct acpi_object_buffer));
acpi_os_printf("Package %3d\n",
sizeof(struct acpi_object_package));
acpi_os_printf("BufferField %3d\n",
sizeof(struct acpi_object_buffer_field));
acpi_os_printf("Device %3d\n",
sizeof(struct acpi_object_device));
acpi_os_printf("Event %3d\n",
sizeof(struct acpi_object_event));
acpi_os_printf("Method %3d\n",
sizeof(struct acpi_object_method));
acpi_os_printf("Mutex %3d\n",
sizeof(struct acpi_object_mutex));
acpi_os_printf("Region %3d\n",
sizeof(struct acpi_object_region));
acpi_os_printf("PowerResource %3d\n",
sizeof(struct acpi_object_power_resource));
acpi_os_printf("Processor %3d\n",
sizeof(struct acpi_object_processor));
acpi_os_printf("ThermalZone %3d\n",
sizeof(struct acpi_object_thermal_zone));
acpi_os_printf("RegionField %3d\n",
sizeof(struct acpi_object_region_field));
acpi_os_printf("BankField %3d\n",
sizeof(struct acpi_object_bank_field));
acpi_os_printf("IndexField %3d\n",
sizeof(struct acpi_object_index_field));
acpi_os_printf("Reference %3d\n",
sizeof(struct acpi_object_reference));
acpi_os_printf("Notify %3d\n",
sizeof(struct acpi_object_notify_handler));
acpi_os_printf("AddressSpace %3d\n",
sizeof(struct acpi_object_addr_handler));
acpi_os_printf("Extra %3d\n",
sizeof(struct acpi_object_extra));
acpi_os_printf("Data %3d\n",
sizeof(struct acpi_object_data));
acpi_os_printf("\n");
acpi_os_printf("ParseObject %3d\n",
sizeof(struct acpi_parse_obj_common));
acpi_os_printf("ParseObjectNamed %3d\n",
sizeof(struct acpi_parse_obj_named));
acpi_os_printf("ParseObjectAsl %3d\n",
sizeof(struct acpi_parse_obj_asl));
acpi_os_printf("OperandObject %3d\n",
sizeof(union acpi_operand_object));
acpi_os_printf("NamespaceNode %3d\n",
sizeof(struct acpi_namespace_node));
acpi_os_printf("AcpiObject %3d\n",
sizeof(union acpi_object));
acpi_os_printf("\n");
acpi_os_printf("Generic State %3d\n",
sizeof(union acpi_generic_state));
acpi_os_printf("Common State %3d\n",
sizeof(struct acpi_common_state));
acpi_os_printf("Control State %3d\n",
sizeof(struct acpi_control_state));
acpi_os_printf("Update State %3d\n",
sizeof(struct acpi_update_state));
acpi_os_printf("Scope State %3d\n",
sizeof(struct acpi_scope_state));
acpi_os_printf("Parse Scope %3d\n",
sizeof(struct acpi_pscope_state));
acpi_os_printf("Package State %3d\n",
sizeof(struct acpi_pkg_state));
acpi_os_printf("Thread State %3d\n",
sizeof(struct acpi_thread_state));
acpi_os_printf("Result Values %3d\n",
sizeof(struct acpi_result_values));
acpi_os_printf("Notify Info %3d\n",
sizeof(struct acpi_notify_info));
break;
case CMD_STAT_STACK:
#if defined(ACPI_DEBUG_OUTPUT)
temp =
(u32)ACPI_PTR_DIFF(acpi_gbl_entry_stack_pointer,
acpi_gbl_lowest_stack_pointer);
acpi_os_printf("\nSubsystem Stack Usage:\n\n");
acpi_os_printf("Entry Stack Pointer %p\n",
acpi_gbl_entry_stack_pointer);
acpi_os_printf("Lowest Stack Pointer %p\n",
acpi_gbl_lowest_stack_pointer);
acpi_os_printf("Stack Use %X (%u)\n", temp,
temp);
acpi_os_printf("Deepest Procedure Nesting %u\n",
acpi_gbl_deepest_nesting);
#endif
break;
default:
break;
}
acpi_os_printf("\n");
return (AE_OK);
}
acpi_status
acpi_ut_release_mutex (
acpi_mutex_handle mutex_id)
{
acpi_status status;
u32 i;
u32 this_thread_id;
ACPI_FUNCTION_NAME ("ut_release_mutex");
this_thread_id = acpi_os_get_thread_id ();
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %X releasing Mutex [%s]\n", this_thread_id,
acpi_ut_get_mutex_name (mutex_id)));
if (mutex_id > MAX_MUTEX) {
return (AE_BAD_PARAMETER);
}
/*
* Mutex must be acquired in order to release it!
*/
if (acpi_gbl_mutex_info[mutex_id].owner_id == ACPI_MUTEX_NOT_ACQUIRED) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Mutex [%s] is not acquired, cannot release\n",
acpi_ut_get_mutex_name (mutex_id)));
return (AE_NOT_ACQUIRED);
}
/*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than this one. If so, the thread has violated the mutex
* ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < MAX_MUTEX; i++) {
if (acpi_gbl_mutex_info[i].owner_id == this_thread_id) {
if (i == mutex_id) {
continue;
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid release order: owns [%s], releasing [%s]\n",
acpi_ut_get_mutex_name (i), acpi_ut_get_mutex_name (mutex_id)));
return (AE_RELEASE_DEADLOCK);
}
}
/* Mark unlocked FIRST */
acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
status = acpi_os_signal_semaphore (acpi_gbl_mutex_info[mutex_id].mutex, 1);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Thread %X could not release Mutex [%s] %s\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id),
acpi_format_exception (status)));
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %X released Mutex [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
}
return (status);
}
acpi_status
acpi_db_display_statistics (
NATIVE_CHAR *type_arg)
{
u32 i;
u32 type;
u32 outstanding;
u32 size;
if (!acpi_gbl_DSDT)
{
acpi_os_printf ("*** Warning: There is no DSDT loaded\n");
}
if (!type_arg)
{
acpi_os_printf ("The following subcommands are available:\n ALLOCATIONS, OBJECTS, MEMORY, MISC, SIZES, TABLES\n");
return (AE_OK);
}
STRUPR (type_arg);
type = acpi_db_match_argument (type_arg, acpi_db_stat_types);
if (type == (u32) -1)
{
acpi_os_printf ("Invalid or unsupported argument\n");
return (AE_OK);
}
switch (type)
{
#ifndef PARSER_ONLY
case CMD_ALLOCATIONS:
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
acpi_ut_dump_allocation_info ();
#endif
break;
#endif
case CMD_TABLES:
acpi_os_printf ("ACPI Table Information:\n\n");
if (acpi_gbl_DSDT)
{
acpi_os_printf ("DSDT Length:................% 7ld (%X)\n", acpi_gbl_DSDT->length, acpi_gbl_DSDT->length);
}
break;
case CMD_OBJECTS:
#ifndef PARSER_ONLY
acpi_db_count_namespace_objects ();
acpi_os_printf ("\n_objects defined in the current namespace:\n\n");
acpi_os_printf ("%16.16s % 10.10s % 10.10s\n", "ACPI_TYPE", "NODES", "OBJECTS");
for (i = 0; i < INTERNAL_TYPE_NODE_MAX; i++)
{
acpi_os_printf ("%16.16s % 10ld% 10ld\n", acpi_ut_get_type_name (i),
acpi_gbl_node_type_count [i], acpi_gbl_obj_type_count [i]);
}
acpi_os_printf ("%16.16s % 10ld% 10ld\n", "Misc/Unknown",
acpi_gbl_node_type_count_misc, acpi_gbl_obj_type_count_misc);
acpi_os_printf ("%16.16s % 10ld% 10ld\n", "TOTALS:",
acpi_gbl_num_nodes, acpi_gbl_num_objects);
#endif
break;
case CMD_MEMORY:
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
acpi_os_printf ("\n----Object and Cache Statistics---------------------------------------------\n");
for (i = 0; i < ACPI_NUM_MEM_LISTS; i++)
{
acpi_os_printf ("\n%s\n", acpi_gbl_memory_lists[i].list_name);
if (acpi_gbl_memory_lists[i].max_cache_depth > 0)
{
acpi_os_printf (" Cache: [Depth Max Avail Size] % 7d % 7d % 7d % 7d B\n",
acpi_gbl_memory_lists[i].cache_depth,
acpi_gbl_memory_lists[i].max_cache_depth,
acpi_gbl_memory_lists[i].max_cache_depth - acpi_gbl_memory_lists[i].cache_depth,
(acpi_gbl_memory_lists[i].cache_depth * acpi_gbl_memory_lists[i].object_size));
acpi_os_printf (" Cache: [Requests Hits Misses Obj_size] % 7d % 7d % 7d % 7d B\n",
acpi_gbl_memory_lists[i].cache_requests,
acpi_gbl_memory_lists[i].cache_hits,
acpi_gbl_memory_lists[i].cache_requests - acpi_gbl_memory_lists[i].cache_hits,
acpi_gbl_memory_lists[i].object_size);
}
outstanding = acpi_gbl_memory_lists[i].total_allocated -
acpi_gbl_memory_lists[i].total_freed -
acpi_gbl_memory_lists[i].cache_depth;
if (acpi_gbl_memory_lists[i].object_size)
{
size = ROUND_UP_TO_1K (outstanding * acpi_gbl_memory_lists[i].object_size);
}
else
{
size = ROUND_UP_TO_1K (acpi_gbl_memory_lists[i].current_total_size);
}
acpi_os_printf (" Mem: [Alloc Free Outstanding Size] % 7d % 7d % 7d % 7d Kb\n",
acpi_gbl_memory_lists[i].total_allocated,
acpi_gbl_memory_lists[i].total_freed,
outstanding, size);
}
#endif
break;
case CMD_MISC:
acpi_os_printf ("\n_miscellaneous Statistics:\n\n");
acpi_os_printf ("Calls to Acpi_ps_find:.. ........% 7ld\n", acpi_gbl_ps_find_count);
acpi_os_printf ("Calls to Acpi_ns_lookup:..........% 7ld\n", acpi_gbl_ns_lookup_count);
acpi_os_printf ("\n");
acpi_os_printf ("Mutex usage:\n\n");
for (i = 0; i < NUM_MTX; i++)
{
acpi_os_printf ("%-28s: % 7ld\n", acpi_ut_get_mutex_name (i), acpi_gbl_acpi_mutex_info[i].use_count);
}
break;
case CMD_SIZES:
acpi_os_printf ("\n_internal object sizes:\n\n");
acpi_os_printf ("Common %3d\n", sizeof (ACPI_OBJECT_COMMON));
acpi_os_printf ("Number %3d\n", sizeof (ACPI_OBJECT_INTEGER));
acpi_os_printf ("String %3d\n", sizeof (ACPI_OBJECT_STRING));
acpi_os_printf ("Buffer %3d\n", sizeof (ACPI_OBJECT_BUFFER));
acpi_os_printf ("Package %3d\n", sizeof (ACPI_OBJECT_PACKAGE));
acpi_os_printf ("Buffer_field %3d\n", sizeof (ACPI_OBJECT_BUFFER_FIELD));
acpi_os_printf ("Device %3d\n", sizeof (ACPI_OBJECT_DEVICE));
acpi_os_printf ("Event %3d\n", sizeof (ACPI_OBJECT_EVENT));
acpi_os_printf ("Method %3d\n", sizeof (ACPI_OBJECT_METHOD));
acpi_os_printf ("Mutex %3d\n", sizeof (ACPI_OBJECT_MUTEX));
acpi_os_printf ("Region %3d\n", sizeof (ACPI_OBJECT_REGION));
acpi_os_printf ("Power_resource %3d\n", sizeof (ACPI_OBJECT_POWER_RESOURCE));
acpi_os_printf ("Processor %3d\n", sizeof (ACPI_OBJECT_PROCESSOR));
acpi_os_printf ("Thermal_zone %3d\n", sizeof (ACPI_OBJECT_THERMAL_ZONE));
acpi_os_printf ("Region_field %3d\n", sizeof (ACPI_OBJECT_REGION_FIELD));
acpi_os_printf ("Bank_field %3d\n", sizeof (ACPI_OBJECT_BANK_FIELD));
acpi_os_printf ("Index_field %3d\n", sizeof (ACPI_OBJECT_INDEX_FIELD));
acpi_os_printf ("Reference %3d\n", sizeof (ACPI_OBJECT_REFERENCE));
acpi_os_printf ("Notify_handler %3d\n", sizeof (ACPI_OBJECT_NOTIFY_HANDLER));
acpi_os_printf ("Addr_handler %3d\n", sizeof (ACPI_OBJECT_ADDR_HANDLER));
acpi_os_printf ("Extra %3d\n", sizeof (ACPI_OBJECT_EXTRA));
acpi_os_printf ("\n");
acpi_os_printf ("Parse_object %3d\n", sizeof (acpi_parse_object));
acpi_os_printf ("Parse2_object %3d\n", sizeof (acpi_parse2_object));
acpi_os_printf ("Operand_object %3d\n", sizeof (acpi_operand_object));
acpi_os_printf ("Namespace_node %3d\n", sizeof (acpi_namespace_node));
break;
case CMD_STACK:
size = acpi_gbl_entry_stack_pointer - acpi_gbl_lowest_stack_pointer;
acpi_os_printf ("\n_subsystem Stack Usage:\n\n");
acpi_os_printf ("Entry Stack Pointer %X\n", acpi_gbl_entry_stack_pointer);
acpi_os_printf ("Lowest Stack Pointer %X\n", acpi_gbl_lowest_stack_pointer);
acpi_os_printf ("Stack Use %X (%d)\n", size, size);
acpi_os_printf ("Deepest Procedure Nesting %d\n", acpi_gbl_deepest_nesting);
break;
}
acpi_os_printf ("\n");
return (AE_OK);
}
acpi_status
acpi_ut_acquire_mutex (
ACPI_MUTEX_HANDLE mutex_id)
{
acpi_status status;
u32 i;
u32 this_thread_id;
PROC_NAME ("Ut_acquire_mutex");
if (mutex_id > MAX_MTX) {
return (AE_BAD_PARAMETER);
}
this_thread_id = acpi_os_get_thread_id ();
/*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than or equal to this one. If so, the thread has violated
* the mutex ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < MAX_MTX; i++) {
if (acpi_gbl_acpi_mutex_info[i].owner_id == this_thread_id) {
if (i == mutex_id) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Mutex [%s] already acquired by this thread [%X]\n",
acpi_ut_get_mutex_name (mutex_id), this_thread_id));
return (AE_ALREADY_ACQUIRED);
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid acquire order: Thread %X owns [%s], wants [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (i),
acpi_ut_get_mutex_name (mutex_id)));
return (AE_ACQUIRE_DEADLOCK);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %X attempting to acquire Mutex [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
status = acpi_os_wait_semaphore (acpi_gbl_acpi_mutex_info[mutex_id].mutex,
1, WAIT_FOREVER);
if (ACPI_SUCCESS (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %X acquired Mutex [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
acpi_gbl_acpi_mutex_info[mutex_id].use_count++;
acpi_gbl_acpi_mutex_info[mutex_id].owner_id = this_thread_id;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Thread %X could not acquire Mutex [%s] %s\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id),
acpi_format_exception (status)));
}
return (status);
}