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224 lines
6.0 KiB
224 lines
6.0 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: dsinit - Object initialization namespace walk |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acdispat.h" |
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#include "acnamesp.h" |
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#include "actables.h" |
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#include "acinterp.h" |
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#define _COMPONENT ACPI_DISPATCHER |
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ACPI_MODULE_NAME("dsinit") |
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/* Local prototypes */ |
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static acpi_status |
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acpi_ds_init_one_object(acpi_handle obj_handle, |
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u32 level, void *context, void **return_value); |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ds_init_one_object |
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* |
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* PARAMETERS: obj_handle - Node for the object |
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* level - Current nesting level |
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* context - Points to a init info struct |
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* return_value - Not used |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object |
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* within the namespace. |
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* |
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* Currently, the only objects that require initialization are: |
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* 1) Methods |
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* 2) Operation Regions |
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* |
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******************************************************************************/ |
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static acpi_status |
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acpi_ds_init_one_object(acpi_handle obj_handle, |
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u32 level, void *context, void **return_value) |
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{ |
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struct acpi_init_walk_info *info = |
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(struct acpi_init_walk_info *)context; |
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struct acpi_namespace_node *node = |
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(struct acpi_namespace_node *)obj_handle; |
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acpi_status status; |
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union acpi_operand_object *obj_desc; |
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ACPI_FUNCTION_ENTRY(); |
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/* |
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* We are only interested in NS nodes owned by the table that |
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* was just loaded |
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*/ |
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if (node->owner_id != info->owner_id) { |
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return (AE_OK); |
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} |
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info->object_count++; |
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/* And even then, we are only interested in a few object types */ |
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switch (acpi_ns_get_type(obj_handle)) { |
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case ACPI_TYPE_REGION: |
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status = acpi_ds_initialize_region(obj_handle); |
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if (ACPI_FAILURE(status)) { |
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ACPI_EXCEPTION((AE_INFO, status, |
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"During Region initialization %p [%4.4s]", |
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obj_handle, |
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acpi_ut_get_node_name(obj_handle))); |
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} |
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info->op_region_count++; |
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break; |
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case ACPI_TYPE_METHOD: |
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/* |
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* Auto-serialization support. We will examine each method that is |
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* not_serialized to determine if it creates any Named objects. If |
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* it does, it will be marked serialized to prevent problems if |
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* the method is entered by two or more threads and an attempt is |
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* made to create the same named object twice -- which results in |
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* an AE_ALREADY_EXISTS exception and method abort. |
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*/ |
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info->method_count++; |
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obj_desc = acpi_ns_get_attached_object(node); |
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if (!obj_desc) { |
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break; |
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} |
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/* Ignore if already serialized */ |
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if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) { |
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info->serial_method_count++; |
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break; |
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} |
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if (acpi_gbl_auto_serialize_methods) { |
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/* Parse/scan method and serialize it if necessary */ |
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acpi_ds_auto_serialize_method(node, obj_desc); |
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if (obj_desc->method. |
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info_flags & ACPI_METHOD_SERIALIZED) { |
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/* Method was just converted to Serialized */ |
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info->serial_method_count++; |
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info->serialized_method_count++; |
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break; |
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} |
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} |
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info->non_serial_method_count++; |
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break; |
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case ACPI_TYPE_DEVICE: |
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info->device_count++; |
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break; |
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default: |
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break; |
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} |
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/* |
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* We ignore errors from above, and always return OK, since |
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* we don't want to abort the walk on a single error. |
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*/ |
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return (AE_OK); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ds_initialize_objects |
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* |
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* PARAMETERS: table_desc - Descriptor for parent ACPI table |
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* start_node - Root of subtree to be initialized. |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Walk the namespace starting at "StartNode" and perform any |
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* necessary initialization on the objects found therein |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ds_initialize_objects(u32 table_index, |
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struct acpi_namespace_node *start_node) |
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{ |
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acpi_status status; |
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struct acpi_init_walk_info info; |
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struct acpi_table_header *table; |
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acpi_owner_id owner_id; |
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ACPI_FUNCTION_TRACE(ds_initialize_objects); |
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status = acpi_tb_get_owner_id(table_index, &owner_id); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"**** Starting initialization of namespace objects ****\n")); |
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/* Set all init info to zero */ |
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memset(&info, 0, sizeof(struct acpi_init_walk_info)); |
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info.owner_id = owner_id; |
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info.table_index = table_index; |
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/* Walk entire namespace from the supplied root */ |
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/* |
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* We don't use acpi_walk_namespace since we do not want to acquire |
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* the namespace reader lock. |
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*/ |
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status = |
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acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, |
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ACPI_NS_WALK_NO_UNLOCK, |
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acpi_ds_init_one_object, NULL, &info, NULL); |
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if (ACPI_FAILURE(status)) { |
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ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); |
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} |
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status = acpi_get_table_by_index(table_index, &table); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* DSDT is always the first AML table */ |
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if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_DSDT)) { |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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"\nACPI table initialization:\n")); |
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} |
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/* Summary of objects initialized */ |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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"Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, " |
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"%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n", |
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table->signature, table->oem_table_id, owner_id, |
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info.object_count, info.device_count, |
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info.op_region_count, info.method_count, |
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info.serial_method_count, |
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info.non_serial_method_count, |
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info.serialized_method_count)); |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n", |
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info.method_count, info.op_region_count)); |
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return_ACPI_STATUS(AE_OK); |
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}
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