err.no Git - linux-2.6/blob - drivers/acpi/tables/tbinstal.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbinstal - ACPI table installation and removal
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2007, 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 #include <acpi/acpi.h>
  45 #include <acpi/acnamesp.h>
  46 #include <acpi/actables.h>
  47
  48 #define _COMPONENT          ACPI_TABLES
  49 ACPI_MODULE_NAME("tbinstal")
  50
  51 /******************************************************************************
  52  *
  53  * FUNCTION:    acpi_tb_verify_table
  54  *
  55  * PARAMETERS:  table_desc          - table
  56  *
  57  * RETURN:      Status
  58  *
  59  * DESCRIPTION: this function is called to verify and map table
  60  *
  61  *****************************************************************************/
  62 acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
  63 {
  64         acpi_status status = AE_OK;
  65
  66         ACPI_FUNCTION_TRACE(tb_verify_table);
  67
  68         /* Map the table if necessary */
  69
  70         if (!table_desc->pointer) {
  71                 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
  72                     ACPI_TABLE_ORIGIN_MAPPED) {
  73                         table_desc->pointer =
  74                             acpi_os_map_memory(table_desc->address,
  75                                                table_desc->length);
  76                 }
  77                 if (!table_desc->pointer) {
  78                         return_ACPI_STATUS(AE_NO_MEMORY);
  79                 }
  80         }
  81
  82         /* FACS is the odd table, has no standard ACPI header and no checksum */
  83
  84         if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
  85
  86                 /* Always calculate checksum, ignore bad checksum if requested */
  87
  88                 status =
  89                     acpi_tb_verify_checksum(table_desc->pointer,
  90                                             table_desc->length);
  91         }
  92
  93         return_ACPI_STATUS(status);
  94 }
  95
  96 /*******************************************************************************
  97  *
  98  * FUNCTION:    acpi_tb_add_table
  99  *
 100  * PARAMETERS:  table_desc          - Table descriptor
 101  *              table_index         - Where the table index is returned
 102  *
 103  * RETURN:      Status
 104  *
 105  * DESCRIPTION: This function is called to add the ACPI table
 106  *
 107  ******************************************************************************/
 108
 109 acpi_status
 110 acpi_tb_add_table(struct acpi_table_desc *table_desc,
 111                   acpi_native_uint * table_index)
 112 {
 113         acpi_native_uint i;
 114         acpi_native_uint length;
 115         acpi_status status = AE_OK;
 116
 117         ACPI_FUNCTION_TRACE(tb_add_table);
 118
 119         if (!table_desc->pointer) {
 120                 status = acpi_tb_verify_table(table_desc);
 121                 if (ACPI_FAILURE(status) || !table_desc->pointer) {
 122                         return_ACPI_STATUS(status);
 123                 }
 124         }
 125
 126         /* The table must be either an SSDT or a PSDT */
 127
 128         if ((!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_PSDT))
 129             &&
 130             (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)))
 131         {
 132                 ACPI_ERROR((AE_INFO,
 133                             "Table has invalid signature [%4.4s], must be SSDT or PSDT",
 134                             table_desc->pointer->signature));
 135                 return_ACPI_STATUS(AE_BAD_SIGNATURE);
 136         }
 137
 138         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 139
 140         /* Check if table is already registered */
 141
 142         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 143                 if (!acpi_gbl_root_table_list.tables[i].pointer) {
 144                         status =
 145                             acpi_tb_verify_table(&acpi_gbl_root_table_list.
 146                                                  tables[i]);
 147                         if (ACPI_FAILURE(status)
 148                             || !acpi_gbl_root_table_list.tables[i].pointer) {
 149                                 continue;
 150                         }
 151                 }
 152
 153                 length = ACPI_MIN(table_desc->length,
 154                                   acpi_gbl_root_table_list.tables[i].length);
 155                 if (ACPI_MEMCMP(table_desc->pointer,
 156                                 acpi_gbl_root_table_list.tables[i].pointer,
 157                                 length)) {
 158                         continue;
 159                 }
 160
 161                 /* Table is already registered */
 162
 163                 acpi_tb_delete_table(table_desc);
 164                 *table_index = i;
 165                 goto release;
 166         }
 167
 168         /*
 169          * Add the table to the global table list
 170          */
 171         status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
 172                                      table_desc->length, table_desc->flags,
 173                                      table_index);
 174         if (ACPI_FAILURE(status)) {
 175                 goto release;
 176         }
 177
 178         acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
 179
 180       release:
 181         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 182         return_ACPI_STATUS(status);
 183 }
 184
 185 /*******************************************************************************
 186  *
 187  * FUNCTION:    acpi_tb_resize_root_table_list
 188  *
 189  * PARAMETERS:  None
 190  *
 191  * RETURN:      Status
 192  *
 193  * DESCRIPTION: Expand the size of global table array
 194  *
 195  ******************************************************************************/
 196
 197 acpi_status acpi_tb_resize_root_table_list(void)
 198 {
 199         struct acpi_table_desc *tables;
 200
 201         ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
 202
 203         /* allow_resize flag is a parameter to acpi_initialize_tables */
 204
 205         if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
 206                 ACPI_ERROR((AE_INFO,
 207                             "Resize of Root Table Array is not allowed"));
 208                 return_ACPI_STATUS(AE_SUPPORT);
 209         }
 210
 211         /* Increase the Table Array size */
 212
 213         tables = ACPI_ALLOCATE_ZEROED((acpi_gbl_root_table_list.size +
 214                                        ACPI_ROOT_TABLE_SIZE_INCREMENT)
 215                                       * sizeof(struct acpi_table_desc));
 216         if (!tables) {
 217                 ACPI_ERROR((AE_INFO,
 218                             "Could not allocate new root table array"));
 219                 return_ACPI_STATUS(AE_NO_MEMORY);
 220         }
 221
 222         /* Copy and free the previous table array */
 223
 224         if (acpi_gbl_root_table_list.tables) {
 225                 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
 226                             acpi_gbl_root_table_list.size *
 227                             sizeof(struct acpi_table_desc));
 228
 229                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 230                         ACPI_FREE(acpi_gbl_root_table_list.tables);
 231                 }
 232         }
 233
 234         acpi_gbl_root_table_list.tables = tables;
 235         acpi_gbl_root_table_list.size += ACPI_ROOT_TABLE_SIZE_INCREMENT;
 236         acpi_gbl_root_table_list.flags |= (u8) ACPI_ROOT_ORIGIN_ALLOCATED;
 237
 238         return_ACPI_STATUS(AE_OK);
 239 }
 240
 241 /*******************************************************************************
 242  *
 243  * FUNCTION:    acpi_tb_store_table
 244  *
 245  * PARAMETERS:  Address             - Table address
 246  *              Table               - Table header
 247  *              Length              - Table length
 248  *              Flags               - flags
 249  *
 250  * RETURN:      Status and table index.
 251  *
 252  * DESCRIPTION: Add an ACPI table to the global table list
 253  *
 254  ******************************************************************************/
 255
 256 acpi_status
 257 acpi_tb_store_table(acpi_physical_address address,
 258                     struct acpi_table_header *table,
 259                     u32 length, u8 flags, acpi_native_uint * table_index)
 260 {
 261         acpi_status status = AE_OK;
 262
 263         /* Ensure that there is room for the table in the Root Table List */
 264
 265         if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) {
 266                 status = acpi_tb_resize_root_table_list();
 267                 if (ACPI_FAILURE(status)) {
 268                         return (status);
 269                 }
 270         }
 271
 272         /* Initialize added table */
 273
 274         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 275             address = address;
 276         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 277             pointer = table;
 278         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].length =
 279             length;
 280         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 281             owner_id = 0;
 282         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].flags =
 283             flags;
 284
 285         ACPI_MOVE_32_TO_32(&
 286                            (acpi_gbl_root_table_list.
 287                             tables[acpi_gbl_root_table_list.count].signature),
 288                            table->signature);
 289
 290         *table_index = acpi_gbl_root_table_list.count;
 291         acpi_gbl_root_table_list.count++;
 292         return (status);
 293 }
 294
 295 /*******************************************************************************
 296  *
 297  * FUNCTION:    acpi_tb_delete_table
 298  *
 299  * PARAMETERS:  table_index         - Table index
 300  *
 301  * RETURN:      None
 302  *
 303  * DESCRIPTION: Delete one internal ACPI table
 304  *
 305  ******************************************************************************/
 306
 307 void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
 308 {
 309         /* Table must be mapped or allocated */
 310         if (!table_desc->pointer) {
 311                 return;
 312         }
 313         switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
 314         case ACPI_TABLE_ORIGIN_MAPPED:
 315                 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
 316                 break;
 317         case ACPI_TABLE_ORIGIN_ALLOCATED:
 318                 ACPI_FREE(table_desc->pointer);
 319                 break;
 320         default:;
 321         }
 322
 323         table_desc->pointer = NULL;
 324 }
 325
 326 /*******************************************************************************
 327  *
 328  * FUNCTION:    acpi_tb_terminate
 329  *
 330  * PARAMETERS:  None
 331  *
 332  * RETURN:      None
 333  *
 334  * DESCRIPTION: Delete all internal ACPI tables
 335  *
 336  ******************************************************************************/
 337
 338 void acpi_tb_terminate(void)
 339 {
 340         acpi_native_uint i;
 341
 342         ACPI_FUNCTION_TRACE(tb_terminate);
 343
 344         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 345
 346         /* Delete the individual tables */
 347
 348         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 349                 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
 350         }
 351
 352         /*
 353          * Delete the root table array if allocated locally. Array cannot be
 354          * mapped, so we don't need to check for that flag.
 355          */
 356         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 357                 ACPI_FREE(acpi_gbl_root_table_list.tables);
 358         }
 359
 360         acpi_gbl_root_table_list.tables = NULL;
 361         acpi_gbl_root_table_list.flags = 0;
 362         acpi_gbl_root_table_list.count = 0;
 363
 364         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 365         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 366 }
 367
 368 /*******************************************************************************
 369  *
 370  * FUNCTION:    acpi_tb_delete_namespace_by_owner
 371  *
 372  * PARAMETERS:  table_index         - Table index
 373  *
 374  * RETURN:      None
 375  *
 376  * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 377  *
 378  ******************************************************************************/
 379
 380 void acpi_tb_delete_namespace_by_owner(acpi_native_uint table_index)
 381 {
 382         acpi_owner_id owner_id;
 383
 384         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 385         if (table_index < acpi_gbl_root_table_list.count) {
 386                 owner_id =
 387                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 388         } else {
 389                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 390                 return;
 391         }
 392
 393         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 394         acpi_ns_delete_namespace_by_owner(owner_id);
 395 }
 396
 397 /*******************************************************************************
 398  *
 399  * FUNCTION:    acpi_tb_allocate_owner_id
 400  *
 401  * PARAMETERS:  table_index         - Table index
 402  *
 403  * RETURN:      Status
 404  *
 405  * DESCRIPTION: Allocates owner_id in table_desc
 406  *
 407  ******************************************************************************/
 408
 409 acpi_status acpi_tb_allocate_owner_id(acpi_native_uint table_index)
 410 {
 411         acpi_status status = AE_BAD_PARAMETER;
 412
 413         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 414
 415         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 416         if (table_index < acpi_gbl_root_table_list.count) {
 417                 status = acpi_ut_allocate_owner_id
 418                     (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
 419         }
 420
 421         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 422         return_ACPI_STATUS(status);
 423 }
 424
 425 /*******************************************************************************
 426  *
 427  * FUNCTION:    acpi_tb_release_owner_id
 428  *
 429  * PARAMETERS:  table_index         - Table index
 430  *
 431  * RETURN:      Status
 432  *
 433  * DESCRIPTION: Releases owner_id in table_desc
 434  *
 435  ******************************************************************************/
 436
 437 acpi_status acpi_tb_release_owner_id(acpi_native_uint table_index)
 438 {
 439         acpi_status status = AE_BAD_PARAMETER;
 440
 441         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 442
 443         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 444         if (table_index < acpi_gbl_root_table_list.count) {
 445                 acpi_ut_release_owner_id(&
 446                                          (acpi_gbl_root_table_list.
 447                                           tables[table_index].owner_id));
 448                 status = AE_OK;
 449         }
 450
 451         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 452         return_ACPI_STATUS(status);
 453 }
 454
 455 /*******************************************************************************
 456  *
 457  * FUNCTION:    acpi_tb_get_owner_id
 458  *
 459  * PARAMETERS:  table_index         - Table index
 460  *              owner_id            - Where the table owner_id is returned
 461  *
 462  * RETURN:      Status
 463  *
 464  * DESCRIPTION: returns owner_id for the ACPI table
 465  *
 466  ******************************************************************************/
 467
 468 acpi_status
 469 acpi_tb_get_owner_id(acpi_native_uint table_index, acpi_owner_id * owner_id)
 470 {
 471         acpi_status status = AE_BAD_PARAMETER;
 472
 473         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 474
 475         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 476         if (table_index < acpi_gbl_root_table_list.count) {
 477                 *owner_id =
 478                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 479                 status = AE_OK;
 480         }
 481
 482         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 483         return_ACPI_STATUS(status);
 484 }
 485
 486 /*******************************************************************************
 487  *
 488  * FUNCTION:    acpi_tb_is_table_loaded
 489  *
 490  * PARAMETERS:  table_index         - Table index
 491  *
 492  * RETURN:      Table Loaded Flag
 493  *
 494  ******************************************************************************/
 495
 496 u8 acpi_tb_is_table_loaded(acpi_native_uint table_index)
 497 {
 498         u8 is_loaded = FALSE;
 499
 500         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 501         if (table_index < acpi_gbl_root_table_list.count) {
 502                 is_loaded = (u8)
 503                     (acpi_gbl_root_table_list.tables[table_index].
 504                      flags & ACPI_TABLE_IS_LOADED);
 505         }
 506
 507         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 508         return (is_loaded);
 509 }
 510
 511 /*******************************************************************************
 512  *
 513  * FUNCTION:    acpi_tb_set_table_loaded_flag
 514  *
 515  * PARAMETERS:  table_index         - Table index
 516  *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 517  *
 518  * RETURN:      None
 519  *
 520  * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 521  *
 522  ******************************************************************************/
 523
 524 void acpi_tb_set_table_loaded_flag(acpi_native_uint table_index, u8 is_loaded)
 525 {
 526
 527         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 528         if (table_index < acpi_gbl_root_table_list.count) {
 529                 if (is_loaded) {
 530                         acpi_gbl_root_table_list.tables[table_index].flags |=
 531                             ACPI_TABLE_IS_LOADED;
 532                 } else {
 533                         acpi_gbl_root_table_list.tables[table_index].flags &=
 534                             ~ACPI_TABLE_IS_LOADED;
 535                 }
 536         }
 537
 538         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 539 }