| // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
| /****************************************************************************** |
| * |
| * Module Name: dsinit - Object initialization namespace walk |
| * |
| * Copyright (C) 2000 - 2022, 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); |
| } |