1 /****************************************************************************** 2 * 3 * Module Name: dsinit - Object initialization namespace walk 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2017, 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 #include "acinterp.h" 50 51 #define _COMPONENT ACPI_DISPATCHER 52 ACPI_MODULE_NAME("dsinit") 53 54 /* Local prototypes */ 55 static acpi_status 56 acpi_ds_init_one_object(acpi_handle obj_handle, 57 u32 level, void *context, void **return_value); 58 59 /******************************************************************************* 60 * 61 * FUNCTION: acpi_ds_init_one_object 62 * 63 * PARAMETERS: obj_handle - Node for the object 64 * level - Current nesting level 65 * context - Points to a init info struct 66 * return_value - Not used 67 * 68 * RETURN: Status 69 * 70 * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object 71 * within the namespace. 72 * 73 * Currently, the only objects that require initialization are: 74 * 1) Methods 75 * 2) Operation Regions 76 * 77 ******************************************************************************/ 78 79 static acpi_status 80 acpi_ds_init_one_object(acpi_handle obj_handle, 81 u32 level, void *context, void **return_value) 82 { 83 struct acpi_init_walk_info *info = 84 (struct acpi_init_walk_info *)context; 85 struct acpi_namespace_node *node = 86 (struct acpi_namespace_node *)obj_handle; 87 acpi_status status; 88 union acpi_operand_object *obj_desc; 89 90 ACPI_FUNCTION_ENTRY(); 91 92 /* 93 * We are only interested in NS nodes owned by the table that 94 * was just loaded 95 */ 96 if (node->owner_id != info->owner_id) { 97 return (AE_OK); 98 } 99 100 info->object_count++; 101 102 /* And even then, we are only interested in a few object types */ 103 104 switch (acpi_ns_get_type(obj_handle)) { 105 case ACPI_TYPE_REGION: 106 107 status = acpi_ds_initialize_region(obj_handle); 108 if (ACPI_FAILURE(status)) { 109 ACPI_EXCEPTION((AE_INFO, status, 110 "During Region initialization %p [%4.4s]", 111 obj_handle, 112 acpi_ut_get_node_name(obj_handle))); 113 } 114 115 info->op_region_count++; 116 break; 117 118 case ACPI_TYPE_METHOD: 119 /* 120 * Auto-serialization support. We will examine each method that is 121 * not_serialized to determine if it creates any Named objects. If 122 * it does, it will be marked serialized to prevent problems if 123 * the method is entered by two or more threads and an attempt is 124 * made to create the same named object twice -- which results in 125 * an AE_ALREADY_EXISTS exception and method abort. 126 */ 127 info->method_count++; 128 obj_desc = acpi_ns_get_attached_object(node); 129 if (!obj_desc) { 130 break; 131 } 132 133 /* Ignore if already serialized */ 134 135 if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) { 136 info->serial_method_count++; 137 break; 138 } 139 140 if (acpi_gbl_auto_serialize_methods) { 141 142 /* Parse/scan method and serialize it if necessary */ 143 144 acpi_ds_auto_serialize_method(node, obj_desc); 145 if (obj_desc->method. 146 info_flags & ACPI_METHOD_SERIALIZED) { 147 148 /* Method was just converted to Serialized */ 149 150 info->serial_method_count++; 151 info->serialized_method_count++; 152 break; 153 } 154 } 155 156 info->non_serial_method_count++; 157 break; 158 159 case ACPI_TYPE_DEVICE: 160 161 info->device_count++; 162 break; 163 164 default: 165 166 break; 167 } 168 169 /* 170 * We ignore errors from above, and always return OK, since 171 * we don't want to abort the walk on a single error. 172 */ 173 return (AE_OK); 174 } 175 176 /******************************************************************************* 177 * 178 * FUNCTION: acpi_ds_initialize_objects 179 * 180 * PARAMETERS: table_desc - Descriptor for parent ACPI table 181 * start_node - Root of subtree to be initialized. 182 * 183 * RETURN: Status 184 * 185 * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any 186 * necessary initialization on the objects found therein 187 * 188 ******************************************************************************/ 189 190 acpi_status 191 acpi_ds_initialize_objects(u32 table_index, 192 struct acpi_namespace_node *start_node) 193 { 194 acpi_status status; 195 struct acpi_init_walk_info info; 196 struct acpi_table_header *table; 197 acpi_owner_id owner_id; 198 199 ACPI_FUNCTION_TRACE(ds_initialize_objects); 200 201 status = acpi_tb_get_owner_id(table_index, &owner_id); 202 if (ACPI_FAILURE(status)) { 203 return_ACPI_STATUS(status); 204 } 205 206 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 207 "**** Starting initialization of namespace objects ****\n")); 208 209 /* Set all init info to zero */ 210 211 memset(&info, 0, sizeof(struct acpi_init_walk_info)); 212 213 info.owner_id = owner_id; 214 info.table_index = table_index; 215 216 /* Walk entire namespace from the supplied root */ 217 218 /* 219 * We don't use acpi_walk_namespace since we do not want to acquire 220 * the namespace reader lock. 221 */ 222 status = 223 acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, 224 ACPI_NS_WALK_NO_UNLOCK, 225 acpi_ds_init_one_object, NULL, &info, NULL); 226 if (ACPI_FAILURE(status)) { 227 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); 228 } 229 230 status = acpi_get_table_by_index(table_index, &table); 231 if (ACPI_FAILURE(status)) { 232 return_ACPI_STATUS(status); 233 } 234 235 /* DSDT is always the first AML table */ 236 237 if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT)) { 238 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 239 "\nInitializing Namespace objects:\n")); 240 } 241 242 /* Summary of objects initialized */ 243 244 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 245 "Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, " 246 "%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n", 247 table->signature, table->oem_table_id, owner_id, 248 info.object_count, info.device_count, 249 info.op_region_count, info.method_count, 250 info.serial_method_count, 251 info.non_serial_method_count, 252 info.serialized_method_count)); 253 254 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n", 255 info.method_count, info.op_region_count)); 256 257 return_ACPI_STATUS(AE_OK); 258 } 259