git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/namespace/nsinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: nsinit - namespace initialization
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2005, R. Byron Moore
   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
  45 #include <acpi/acpi.h>
  46 #include <acpi/acnamesp.h>
  47 #include <acpi/acdispat.h>
  48 #include <acpi/acinterp.h>
  49
  50 #define _COMPONENT          ACPI_NAMESPACE
  51          ACPI_MODULE_NAME    ("nsinit")
  52
  53 /* Local prototypes */
  54
  55 static acpi_status
  56 acpi_ns_init_one_object (
  57         acpi_handle                     obj_handle,
  58         u32                             level,
  59         void                            *context,
  60         void                            **return_value);
  61
  62 static acpi_status
  63 acpi_ns_init_one_device (
  64         acpi_handle                     obj_handle,
  65         u32                             nesting_level,
  66         void                            *context,
  67         void                            **return_value);
  68
  69
  70 /*******************************************************************************
  71  *
  72  * FUNCTION:    acpi_ns_initialize_objects
  73  *
  74  * PARAMETERS:  None
  75  *
  76  * RETURN:      Status
  77  *
  78  * DESCRIPTION: Walk the entire namespace and perform any necessary
  79  *              initialization on the objects found therein
  80  *
  81  ******************************************************************************/
  82
  83 acpi_status
  84 acpi_ns_initialize_objects (
  85         void)
  86 {
  87         acpi_status                     status;
  88         struct acpi_init_walk_info      info;
  89
  90
  91         ACPI_FUNCTION_TRACE ("ns_initialize_objects");
  92
  93
  94         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
  95                 "**** Starting initialization of namespace objects ****\n"));
  96         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
  97                 "Completing Region/Field/Buffer/Package initialization:"));
  98
  99         /* Set all init info to zero */
 100
 101         ACPI_MEMSET (&info, 0, sizeof (struct acpi_init_walk_info));
 102
 103         /* Walk entire namespace from the supplied root */
 104
 105         status = acpi_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
 106                           ACPI_UINT32_MAX, acpi_ns_init_one_object,
 107                           &info, NULL);
 108         if (ACPI_FAILURE (status)) {
 109                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",
 110                         acpi_format_exception (status)));
 111         }
 112
 113         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 114                 "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n",
 115                 info.op_region_init, info.op_region_count,
 116                 info.field_init,    info.field_count,
 117                 info.buffer_init,   info.buffer_count,
 118                 info.package_init,  info.package_count, info.object_count));
 119
 120         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 121                 "%hd Control Methods found\n", info.method_count));
 122         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 123                 "%hd Op Regions found\n", info.op_region_count));
 124
 125         return_ACPI_STATUS (AE_OK);
 126 }
 127
 128
 129 /*******************************************************************************
 130  *
 131  * FUNCTION:    acpi_ns_initialize_devices
 132  *
 133  * PARAMETERS:  None
 134  *
 135  * RETURN:      acpi_status
 136  *
 137  * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
 138  *              This means running _INI on all present devices.
 139  *
 140  *              Note: We install PCI config space handler on region access,
 141  *              not here.
 142  *
 143  ******************************************************************************/
 144
 145 acpi_status
 146 acpi_ns_initialize_devices (
 147         void)
 148 {
 149         acpi_status                     status;
 150         struct acpi_device_walk_info    info;
 151
 152
 153         ACPI_FUNCTION_TRACE ("ns_initialize_devices");
 154
 155
 156         /* Init counters */
 157
 158         info.device_count = 0;
 159         info.num_STA = 0;
 160         info.num_INI = 0;
 161
 162         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 163                 "Executing all Device _STA and_INI methods:"));
 164
 165         status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
 166         if (ACPI_FAILURE (status)) {
 167                 return_ACPI_STATUS (status);
 168         }
 169
 170         /* Walk namespace for all objects */
 171
 172         status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
 173                           ACPI_UINT32_MAX, TRUE, acpi_ns_init_one_device, &info, NULL);
 174
 175         (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
 176
 177         if (ACPI_FAILURE (status)) {
 178                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",
 179                         acpi_format_exception (status)));
 180         }
 181
 182         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 183                 "\n%hd Devices found containing: %hd _STA, %hd _INI methods\n",
 184                 info.device_count, info.num_STA, info.num_INI));
 185
 186         return_ACPI_STATUS (status);
 187 }
 188
 189
 190 /*******************************************************************************
 191  *
 192  * FUNCTION:    acpi_ns_init_one_object
 193  *
 194  * PARAMETERS:  obj_handle      - Node
 195  *              Level           - Current nesting level
 196  *              Context         - Points to a init info struct
 197  *              return_value    - Not used
 198  *
 199  * RETURN:      Status
 200  *
 201  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
 202  *              within the  namespace.
 203  *
 204  *              Currently, the only objects that require initialization are:
 205  *              1) Methods
 206  *              2) Op Regions
 207  *
 208  ******************************************************************************/
 209
 210 static acpi_status
 211 acpi_ns_init_one_object (
 212         acpi_handle                     obj_handle,
 213         u32                             level,
 214         void                            *context,
 215         void                            **return_value)
 216 {
 217         acpi_object_type                type;
 218         acpi_status                     status;
 219         struct acpi_init_walk_info      *info = (struct acpi_init_walk_info *) context;
 220         struct acpi_namespace_node      *node = (struct acpi_namespace_node *) obj_handle;
 221         union acpi_operand_object       *obj_desc;
 222
 223
 224         ACPI_FUNCTION_NAME ("ns_init_one_object");
 225
 226
 227         info->object_count++;
 228
 229         /* And even then, we are only interested in a few object types */
 230
 231         type = acpi_ns_get_type (obj_handle);
 232         obj_desc = acpi_ns_get_attached_object (node);
 233         if (!obj_desc) {
 234                 return (AE_OK);
 235         }
 236
 237         /* Increment counters for object types we are looking for */
 238
 239         switch (type) {
 240         case ACPI_TYPE_REGION:
 241                 info->op_region_count++;
 242                 break;
 243
 244         case ACPI_TYPE_BUFFER_FIELD:
 245                 info->field_count++;
 246                 break;
 247
 248         case ACPI_TYPE_BUFFER:
 249                 info->buffer_count++;
 250                 break;
 251
 252         case ACPI_TYPE_PACKAGE:
 253                 info->package_count++;
 254                 break;
 255
 256         default:
 257
 258                 /* No init required, just exit now */
 259                 return (AE_OK);
 260         }
 261
 262         /*
 263          * If the object is already initialized, nothing else to do
 264          */
 265         if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
 266                 return (AE_OK);
 267         }
 268
 269         /*
 270          * Must lock the interpreter before executing AML code
 271          */
 272         status = acpi_ex_enter_interpreter ();
 273         if (ACPI_FAILURE (status)) {
 274                 return (status);
 275         }
 276
 277         /*
 278          * Each of these types can contain executable AML code within the
 279          * declaration.
 280          */
 281         switch (type) {
 282         case ACPI_TYPE_REGION:
 283
 284                 info->op_region_init++;
 285                 status = acpi_ds_get_region_arguments (obj_desc);
 286                 break;
 287
 288         case ACPI_TYPE_BUFFER_FIELD:
 289
 290                 info->field_init++;
 291                 status = acpi_ds_get_buffer_field_arguments (obj_desc);
 292                 break;
 293
 294         case ACPI_TYPE_BUFFER:
 295
 296                 info->buffer_init++;
 297                 status = acpi_ds_get_buffer_arguments (obj_desc);
 298                 break;
 299
 300         case ACPI_TYPE_PACKAGE:
 301
 302                 info->package_init++;
 303                 status = acpi_ds_get_package_arguments (obj_desc);
 304                 break;
 305
 306         default:
 307                 /* No other types can get here */
 308                 break;
 309         }
 310
 311         if (ACPI_FAILURE (status)) {
 312                 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, "\n"));
 313                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 314                                 "Could not execute arguments for [%4.4s] (%s), %s\n",
 315                                 acpi_ut_get_node_name (node), acpi_ut_get_type_name (type),
 316                                 acpi_format_exception (status)));
 317         }
 318
 319         /*
 320          * Print a dot for each object unless we are going to print the entire
 321          * pathname
 322          */
 323         if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
 324                 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
 325         }
 326
 327         /*
 328          * We ignore errors from above, and always return OK, since we don't want
 329          * to abort the walk on any single error.
 330          */
 331         acpi_ex_exit_interpreter ();
 332         return (AE_OK);
 333 }
 334
 335
 336 /*******************************************************************************
 337  *
 338  * FUNCTION:    acpi_ns_init_one_device
 339  *
 340  * PARAMETERS:  acpi_walk_callback
 341  *
 342  * RETURN:      acpi_status
 343  *
 344  * DESCRIPTION: This is called once per device soon after ACPI is enabled
 345  *              to initialize each device. It determines if the device is
 346  *              present, and if so, calls _INI.
 347  *
 348  ******************************************************************************/
 349
 350 static acpi_status
 351 acpi_ns_init_one_device (
 352         acpi_handle                     obj_handle,
 353         u32                             nesting_level,
 354         void                            *context,
 355         void                            **return_value)
 356 {
 357         struct acpi_device_walk_info   *info = (struct acpi_device_walk_info *) context;
 358         struct acpi_parameter_info      pinfo;
 359         u32                             flags;
 360         acpi_status                     status;
 361
 362
 363         ACPI_FUNCTION_TRACE ("ns_init_one_device");
 364
 365
 366         pinfo.parameters = NULL;
 367         pinfo.parameter_type = ACPI_PARAM_ARGS;
 368
 369         pinfo.node = acpi_ns_map_handle_to_node (obj_handle);
 370         if (!pinfo.node) {
 371                 return_ACPI_STATUS (AE_BAD_PARAMETER);
 372         }
 373
 374         /*
 375          * We will run _STA/_INI on Devices, Processors and thermal_zones only
 376          */
 377         if ((pinfo.node->type != ACPI_TYPE_DEVICE)      &&
 378                 (pinfo.node->type != ACPI_TYPE_PROCESSOR)   &&
 379                 (pinfo.node->type != ACPI_TYPE_THERMAL)) {
 380                 return_ACPI_STATUS (AE_OK);
 381         }
 382
 383         if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) &&
 384                 (!(acpi_dbg_level & ACPI_LV_INFO))) {
 385                 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
 386         }
 387
 388         info->device_count++;
 389
 390         /*
 391          * Run _STA to determine if we can run _INI on the device.
 392          */
 393         ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD,
 394                            pinfo.node, METHOD_NAME__STA));
 395         status = acpi_ut_execute_STA (pinfo.node, &flags);
 396
 397         if (ACPI_FAILURE (status)) {
 398                 if (pinfo.node->type == ACPI_TYPE_DEVICE) {
 399                         /* Ignore error and move on to next device */
 400
 401                         return_ACPI_STATUS (AE_OK);
 402                 }
 403
 404                 /* _STA is not required for Processor or thermal_zone objects */
 405         }
 406         else {
 407                 info->num_STA++;
 408
 409                 if (!(flags & 0x01)) {
 410                         /* Don't look at children of a not present device */
 411
 412                         return_ACPI_STATUS(AE_CTRL_DEPTH);
 413                 }
 414         }
 415
 416         /*
 417          * The device is present. Run _INI.
 418          */
 419         ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD,
 420                            pinfo.node, METHOD_NAME__INI));
 421         status = acpi_ns_evaluate_relative (METHOD_NAME__INI, &pinfo);
 422         if (ACPI_FAILURE (status)) {
 423                 /* No _INI (AE_NOT_FOUND) means device requires no initialization */
 424
 425                 if (status != AE_NOT_FOUND) {
 426                         /* Ignore error and move on to next device */
 427
 428 #ifdef ACPI_DEBUG_OUTPUT
 429                         char                *scope_name = acpi_ns_get_external_pathname (pinfo.node);
 430
 431                         ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "%s._INI failed: %s\n",
 432                                         scope_name, acpi_format_exception (status)));
 433
 434                         ACPI_MEM_FREE (scope_name);
 435 #endif
 436                 }
 437
 438                 status = AE_OK;
 439         }
 440         else {
 441                 /* Delete any return object (especially if implicit_return is enabled) */
 442
 443                 if (pinfo.return_object) {
 444                         acpi_ut_remove_reference (pinfo.return_object);
 445                 }
 446
 447                 /* Count of successful INIs */
 448
 449                 info->num_INI++;
 450         }
 451
 452         if (acpi_gbl_init_handler) {
 453                 /* External initialization handler is present, call it */
 454
 455                 status = acpi_gbl_init_handler (pinfo.node, ACPI_INIT_DEVICE_INI);
 456         }
 457
 458         return_ACPI_STATUS (status);
 459 }