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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.02/******************************************************************************3 *4 * Module Name: dsinit - Object initialization namespace walk5 *6 * Copyright (C) 2000 - 2023, Intel Corp.7 *8 *****************************************************************************/9 10#include <acpi/acpi.h>11#include "accommon.h"12#include "acdispat.h"13#include "acnamesp.h"14#include "actables.h"15#include "acinterp.h"16 17#define _COMPONENT          ACPI_DISPATCHER18ACPI_MODULE_NAME("dsinit")19 20/* Local prototypes */21static acpi_status22acpi_ds_init_one_object(acpi_handle obj_handle,23			u32 level, void *context, void **return_value);24 25/*******************************************************************************26 *27 * FUNCTION:    acpi_ds_init_one_object28 *29 * PARAMETERS:  obj_handle      - Node for the object30 *              level           - Current nesting level31 *              context         - Points to a init info struct32 *              return_value    - Not used33 *34 * RETURN:      Status35 *36 * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object37 *              within the namespace.38 *39 *              Currently, the only objects that require initialization are:40 *              1) Methods41 *              2) Operation Regions42 *43 ******************************************************************************/44 45static acpi_status46acpi_ds_init_one_object(acpi_handle obj_handle,47			u32 level, void *context, void **return_value)48{49	struct acpi_init_walk_info *info =50	    (struct acpi_init_walk_info *)context;51	struct acpi_namespace_node *node =52	    (struct acpi_namespace_node *)obj_handle;53	acpi_status status;54	union acpi_operand_object *obj_desc;55 56	ACPI_FUNCTION_ENTRY();57 58	/*59	 * We are only interested in NS nodes owned by the table that60	 * was just loaded61	 */62	if (node->owner_id != info->owner_id) {63		return (AE_OK);64	}65 66	info->object_count++;67 68	/* And even then, we are only interested in a few object types */69 70	switch (acpi_ns_get_type(obj_handle)) {71	case ACPI_TYPE_REGION:72 73		status = acpi_ds_initialize_region(obj_handle);74		if (ACPI_FAILURE(status)) {75			ACPI_EXCEPTION((AE_INFO, status,76					"During Region initialization %p [%4.4s]",77					obj_handle,78					acpi_ut_get_node_name(obj_handle)));79		}80 81		info->op_region_count++;82		break;83 84	case ACPI_TYPE_METHOD:85		/*86		 * Auto-serialization support. We will examine each method that is87		 * not_serialized to determine if it creates any Named objects. If88		 * it does, it will be marked serialized to prevent problems if89		 * the method is entered by two or more threads and an attempt is90		 * made to create the same named object twice -- which results in91		 * an AE_ALREADY_EXISTS exception and method abort.92		 */93		info->method_count++;94		obj_desc = acpi_ns_get_attached_object(node);95		if (!obj_desc) {96			break;97		}98 99		/* Ignore if already serialized */100 101		if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) {102			info->serial_method_count++;103			break;104		}105 106		if (acpi_gbl_auto_serialize_methods) {107 108			/* Parse/scan method and serialize it if necessary */109 110			acpi_ds_auto_serialize_method(node, obj_desc);111			if (obj_desc->method.112			    info_flags & ACPI_METHOD_SERIALIZED) {113 114				/* Method was just converted to Serialized */115 116				info->serial_method_count++;117				info->serialized_method_count++;118				break;119			}120		}121 122		info->non_serial_method_count++;123		break;124 125	case ACPI_TYPE_DEVICE:126 127		info->device_count++;128		break;129 130	default:131 132		break;133	}134 135	/*136	 * We ignore errors from above, and always return OK, since137	 * we don't want to abort the walk on a single error.138	 */139	return (AE_OK);140}141 142/*******************************************************************************143 *144 * FUNCTION:    acpi_ds_initialize_objects145 *146 * PARAMETERS:  table_desc      - Descriptor for parent ACPI table147 *              start_node      - Root of subtree to be initialized.148 *149 * RETURN:      Status150 *151 * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any152 *              necessary initialization on the objects found therein153 *154 ******************************************************************************/155 156acpi_status157acpi_ds_initialize_objects(u32 table_index,158			   struct acpi_namespace_node *start_node)159{160	acpi_status status;161	struct acpi_init_walk_info info;162	struct acpi_table_header *table;163	acpi_owner_id owner_id;164 165	ACPI_FUNCTION_TRACE(ds_initialize_objects);166 167	status = acpi_tb_get_owner_id(table_index, &owner_id);168	if (ACPI_FAILURE(status)) {169		return_ACPI_STATUS(status);170	}171 172	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,173			  "**** Starting initialization of namespace objects ****\n"));174 175	/* Set all init info to zero */176 177	memset(&info, 0, sizeof(struct acpi_init_walk_info));178 179	info.owner_id = owner_id;180	info.table_index = table_index;181 182	/* Walk entire namespace from the supplied root */183 184	/*185	 * We don't use acpi_walk_namespace since we do not want to acquire186	 * the namespace reader lock.187	 */188	status =189	    acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,190				   ACPI_NS_WALK_NO_UNLOCK,191				   acpi_ds_init_one_object, NULL, &info, NULL);192	if (ACPI_FAILURE(status)) {193		ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));194	}195 196	status = acpi_get_table_by_index(table_index, &table);197	if (ACPI_FAILURE(status)) {198		return_ACPI_STATUS(status);199	}200 201	/* DSDT is always the first AML table */202 203	if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_DSDT)) {204		ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,205				      "\nACPI table initialization:\n"));206	}207 208	/* Summary of objects initialized */209 210	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,211			      "Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, "212			      "%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n",213			      table->signature, table->oem_table_id, owner_id,214			      info.object_count, info.device_count,215			      info.op_region_count, info.method_count,216			      info.serial_method_count,217			      info.non_serial_method_count,218			      info.serialized_method_count));219 220	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n",221			  info.method_count, info.op_region_count));222 223	return_ACPI_STATUS(AE_OK);224}225