// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name : dsinit - Object initialization namespace walk
*
* Copyright ( C ) 2000 - 2025 , Intel Corp .
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "actables.h"
#include "acinterp.h"
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME("dsinit" )
/* Local prototypes */
static acpi_status
acpi_ds_init_one_object(acpi_handle obj_handle,
u32 level, void *context, void **return_value);
/*******************************************************************************
*
* FUNCTION : acpi_ds_init_one_object
*
* PARAMETERS : obj_handle - Node for the object
* level - Current nesting level
* context - Points to a init info struct
* return_value - Not used
*
* RETURN : Status
*
* DESCRIPTION : Callback from acpi_walk_namespace . Invoked for every object
* within the namespace .
*
* Currently , the only objects that require initialization are :
* 1 ) Methods
* 2 ) Operation Regions
*
******************************************************************************/
static acpi_status
acpi_ds_init_one_object(acpi_handle obj_handle,
u32 level, void *context, void **return_value)
{
struct acpi_init_walk_info *info =
(struct acpi_init_walk_info *)context;
struct acpi_namespace_node *node =
(struct acpi_namespace_node *)obj_handle;
acpi_status status;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_ENTRY();
/*
* We are only interested in NS nodes owned by the table that
* was just loaded
*/
if (node->owner_id != info->owner_id) {
return (AE_OK);
}
info->object_count++;
/* And even then, we are only interested in a few object types */
switch (acpi_ns_get_type(obj_handle)) {
case ACPI_TYPE_REGION:
status = acpi_ds_initialize_region(obj_handle);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"During Region initialization %p [%4.4s]" ,
obj_handle,
acpi_ut_get_node_name(obj_handle)));
}
info->op_region_count++;
break ;
case ACPI_TYPE_METHOD:
/*
* Auto - serialization support . We will examine each method that is
* not_serialized to determine if it creates any Named objects . If
* it does , it will be marked serialized to prevent problems if
* the method is entered by two or more threads and an attempt is
* made to create the same named object twice - - which results in
* an AE_ALREADY_EXISTS exception and method abort .
*/
info->method_count++;
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
break ;
}
/* Ignore if already serialized */
if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) {
info->serial_method_count++;
break ;
}
if (acpi_gbl_auto_serialize_methods) {
/* Parse/scan method and serialize it if necessary */
acpi_ds_auto_serialize_method(node, obj_desc);
if (obj_desc->method.
info_flags & ACPI_METHOD_SERIALIZED) {
/* Method was just converted to Serialized */
info->serial_method_count++;
info->serialized_method_count++;
break ;
}
}
info->non_serial_method_count++;
break ;
case ACPI_TYPE_DEVICE:
info->device_count++;
break ;
default :
break ;
}
/*
* We ignore errors from above , and always return OK , since
* we don ' t want to abort the walk on a single error .
*/
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION : acpi_ds_initialize_objects
*
* PARAMETERS : table_desc - Descriptor for parent ACPI table
* start_node - Root of subtree to be initialized .
*
* RETURN : Status
*
* DESCRIPTION : Walk the namespace starting at " StartNode " and perform any
* necessary initialization on the objects found therein
*
******************************************************************************/
acpi_status
acpi_ds_initialize_objects(u32 table_index,
struct acpi_namespace_node *start_node)
{
acpi_status status;
struct acpi_init_walk_info info;
struct acpi_table_header *table;
acpi_owner_id owner_id;
ACPI_FUNCTION_TRACE(ds_initialize_objects);
status = acpi_tb_get_owner_id(table_index, &owner_id);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"**** Starting initialization of namespace objects ****\n" ));
/* Set all init info to zero */
memset(&info, 0 , sizeof (struct acpi_init_walk_info));
info.owner_id = owner_id;
info.table_index = table_index;
/* Walk entire namespace from the supplied root */
/*
* We don ' t use acpi_walk_namespace since we do not want to acquire
* the namespace reader lock .
*/
status =
acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
ACPI_NS_WALK_NO_UNLOCK,
acpi_ds_init_one_object, NULL, &info, NULL);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace" ));
}
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* DSDT is always the first AML table */
if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_DSDT)) {
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"\nACPI table initialization:\n" ));
}
/* Summary of objects initialized */
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, "
"%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n" ,
table->signature, table->oem_table_id, owner_id,
info.object_count, info.device_count,
info.op_region_count, info.method_count,
info.serial_method_count,
info.non_serial_method_count,
info.serialized_method_count));
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n" ,
info.method_count, info.op_region_count));
return_ACPI_STATUS(AE_OK);
}
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