1/****************************************************************************** 2 * 3 * Module Name: dsinit - Object initialization namespace walk 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2014, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44#include <acpi/acpi.h> 45#include "accommon.h" 46#include "acdispat.h" 47#include "acnamesp.h" 48#include "actables.h" 49 50#define _COMPONENT ACPI_DISPATCHER 51ACPI_MODULE_NAME("dsinit") 52 53/* Local prototypes */ 54static acpi_status 55acpi_ds_init_one_object(acpi_handle obj_handle, 56 u32 level, void *context, void **return_value); 57 58/******************************************************************************* 59 * 60 * FUNCTION: acpi_ds_init_one_object 61 * 62 * PARAMETERS: obj_handle - Node for the object 63 * level - Current nesting level 64 * context - Points to a init info struct 65 * return_value - Not used 66 * 67 * RETURN: Status 68 * 69 * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object 70 * within the namespace. 71 * 72 * Currently, the only objects that require initialization are: 73 * 1) Methods 74 * 2) Operation Regions 75 * 76 ******************************************************************************/ 77 78static acpi_status 79acpi_ds_init_one_object(acpi_handle obj_handle, 80 u32 level, void *context, void **return_value) 81{ 82 struct acpi_init_walk_info *info = 83 (struct acpi_init_walk_info *)context; 84 struct acpi_namespace_node *node = 85 (struct acpi_namespace_node *)obj_handle; 86 acpi_status status; 87 union acpi_operand_object *obj_desc; 88 89 ACPI_FUNCTION_ENTRY(); 90 91 /* 92 * We are only interested in NS nodes owned by the table that 93 * was just loaded 94 */ 95 if (node->owner_id != info->owner_id) { 96 return (AE_OK); 97 } 98 99 info->object_count++; 100 101 /* And even then, we are only interested in a few object types */ 102 103 switch (acpi_ns_get_type(obj_handle)) { 104 case ACPI_TYPE_REGION: 105 106 status = acpi_ds_initialize_region(obj_handle); 107 if (ACPI_FAILURE(status)) { 108 ACPI_EXCEPTION((AE_INFO, status, 109 "During Region initialization %p [%4.4s]", 110 obj_handle, 111 acpi_ut_get_node_name(obj_handle))); 112 } 113 114 info->op_region_count++; 115 break; 116 117 case ACPI_TYPE_METHOD: 118 /* 119 * Auto-serialization support. We will examine each method that is 120 * not_serialized to determine if it creates any Named objects. If 121 * it does, it will be marked serialized to prevent problems if 122 * the method is entered by two or more threads and an attempt is 123 * made to create the same named object twice -- which results in 124 * an AE_ALREADY_EXISTS exception and method abort. 125 */ 126 info->method_count++; 127 obj_desc = acpi_ns_get_attached_object(node); 128 if (!obj_desc) { 129 break; 130 } 131 132 /* Ignore if already serialized */ 133 134 if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) { 135 info->serial_method_count++; 136 break; 137 } 138 139 if (acpi_gbl_auto_serialize_methods) { 140 141 /* Parse/scan method and serialize it if necessary */ 142 143 acpi_ds_auto_serialize_method(node, obj_desc); 144 if (obj_desc->method. 145 info_flags & ACPI_METHOD_SERIALIZED) { 146 147 /* Method was just converted to Serialized */ 148 149 info->serial_method_count++; 150 info->serialized_method_count++; 151 break; 152 } 153 } 154 155 info->non_serial_method_count++; 156 break; 157 158 case ACPI_TYPE_DEVICE: 159 160 info->device_count++; 161 break; 162 163 default: 164 165 break; 166 } 167 168 /* 169 * We ignore errors from above, and always return OK, since 170 * we don't want to abort the walk on a single error. 171 */ 172 return (AE_OK); 173} 174 175/******************************************************************************* 176 * 177 * FUNCTION: acpi_ds_initialize_objects 178 * 179 * PARAMETERS: table_desc - Descriptor for parent ACPI table 180 * start_node - Root of subtree to be initialized. 181 * 182 * RETURN: Status 183 * 184 * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any 185 * necessary initialization on the objects found therein 186 * 187 ******************************************************************************/ 188 189acpi_status 190acpi_ds_initialize_objects(u32 table_index, 191 struct acpi_namespace_node * start_node) 192{ 193 acpi_status status; 194 struct acpi_init_walk_info info; 195 struct acpi_table_header *table; 196 acpi_owner_id owner_id; 197 198 ACPI_FUNCTION_TRACE(ds_initialize_objects); 199 200 status = acpi_tb_get_owner_id(table_index, &owner_id); 201 if (ACPI_FAILURE(status)) { 202 return_ACPI_STATUS(status); 203 } 204 205 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 206 "**** Starting initialization of namespace objects ****\n")); 207 208 /* Set all init info to zero */ 209 210 ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); 211 212 info.owner_id = owner_id; 213 info.table_index = table_index; 214 215 /* Walk entire namespace from the supplied root */ 216 217 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); 218 if (ACPI_FAILURE(status)) { 219 return_ACPI_STATUS(status); 220 } 221 222 /* 223 * We don't use acpi_walk_namespace since we do not want to acquire 224 * the namespace reader lock. 225 */ 226 status = 227 acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, 228 ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object, 229 NULL, &info, NULL); 230 if (ACPI_FAILURE(status)) { 231 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); 232 } 233 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); 234 235 status = acpi_get_table_by_index(table_index, &table); 236 if (ACPI_FAILURE(status)) { 237 return_ACPI_STATUS(status); 238 } 239 240 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 241 "Table [%4.4s] (id %4.4X) - %4u Objects with %3u Devices, " 242 "%3u Regions, %3u Methods (%u/%u/%u Serial/Non/Cvt)\n", 243 table->signature, owner_id, info.object_count, 244 info.device_count, info.op_region_count, 245 info.method_count, info.serial_method_count, 246 info.non_serial_method_count, 247 info.serialized_method_count)); 248 249 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n", 250 info.method_count, info.op_region_count)); 251 252 return_ACPI_STATUS(AE_OK); 253} 254