git.oblomov.eu 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 - 2008, 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 <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 or an OEMx */
 127
 128         if (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_PSDT)&&
 129             !ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)&&
 130             strncmp(table_desc->pointer->signature, "OEM", 3)) {
 131                 /* Check for a printable name */
 132                 if (acpi_ut_valid_acpi_name(
 133                         *(u32 *) table_desc->pointer->signature)) {
 134                         ACPI_ERROR((AE_INFO, "Table has invalid signature "
 135                                         "[%4.4s], must be SSDT or PSDT",
 136                                     table_desc->pointer->signature));
 137                 } else {
 138                         ACPI_ERROR((AE_INFO, "Table has invalid signature "
 139                                         "(0x%8.8X), must be SSDT or PSDT",
 140                                     *(u32 *) table_desc->pointer->signature));
 141                 }
 142                 return_ACPI_STATUS(AE_BAD_SIGNATURE);
 143         }
 144
 145         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 146
 147         /* Check if table is already registered */
 148
 149         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 150                 if (!acpi_gbl_root_table_list.tables[i].pointer) {
 151                         status =
 152                             acpi_tb_verify_table(&acpi_gbl_root_table_list.
 153                                                  tables[i]);
 154                         if (ACPI_FAILURE(status)
 155                             || !acpi_gbl_root_table_list.tables[i].pointer) {
 156                                 continue;
 157                         }
 158                 }
 159
 160                 length = ACPI_MIN(table_desc->length,
 161                                   acpi_gbl_root_table_list.tables[i].length);
 162                 if (ACPI_MEMCMP(table_desc->pointer,
 163                                 acpi_gbl_root_table_list.tables[i].pointer,
 164                                 length)) {
 165                         continue;
 166                 }
 167
 168                 /* Table is already registered */
 169
 170                 acpi_tb_delete_table(table_desc);
 171                 *table_index = i;
 172                 status = AE_ALREADY_EXISTS;
 173                 goto release;
 174         }
 175
 176         /*
 177          * Add the table to the global table list
 178          */
 179         status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
 180                                      table_desc->length, table_desc->flags,
 181                                      table_index);
 182         if (ACPI_FAILURE(status)) {
 183                 goto release;
 184         }
 185
 186         acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
 187
 188       release:
 189         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 190         return_ACPI_STATUS(status);
 191 }
 192
 193 /*******************************************************************************
 194  *
 195  * FUNCTION:    acpi_tb_resize_root_table_list
 196  *
 197  * PARAMETERS:  None
 198  *
 199  * RETURN:      Status
 200  *
 201  * DESCRIPTION: Expand the size of global table array
 202  *
 203  ******************************************************************************/
 204
 205 acpi_status acpi_tb_resize_root_table_list(void)
 206 {
 207         struct acpi_table_desc *tables;
 208
 209         ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
 210
 211         /* allow_resize flag is a parameter to acpi_initialize_tables */
 212
 213         if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
 214                 ACPI_ERROR((AE_INFO,
 215                             "Resize of Root Table Array is not allowed"));
 216                 return_ACPI_STATUS(AE_SUPPORT);
 217         }
 218
 219         /* Increase the Table Array size */
 220
 221         tables = ACPI_ALLOCATE_ZEROED((acpi_gbl_root_table_list.size +
 222                                        ACPI_ROOT_TABLE_SIZE_INCREMENT)
 223                                       * sizeof(struct acpi_table_desc));
 224         if (!tables) {
 225                 ACPI_ERROR((AE_INFO,
 226                             "Could not allocate new root table array"));
 227                 return_ACPI_STATUS(AE_NO_MEMORY);
 228         }
 229
 230         /* Copy and free the previous table array */
 231
 232         if (acpi_gbl_root_table_list.tables) {
 233                 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
 234                             acpi_gbl_root_table_list.size *
 235                             sizeof(struct acpi_table_desc));
 236
 237                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 238                         ACPI_FREE(acpi_gbl_root_table_list.tables);
 239                 }
 240         }
 241
 242         acpi_gbl_root_table_list.tables = tables;
 243         acpi_gbl_root_table_list.size += ACPI_ROOT_TABLE_SIZE_INCREMENT;
 244         acpi_gbl_root_table_list.flags |= (u8) ACPI_ROOT_ORIGIN_ALLOCATED;
 245
 246         return_ACPI_STATUS(AE_OK);
 247 }
 248
 249 /*******************************************************************************
 250  *
 251  * FUNCTION:    acpi_tb_store_table
 252  *
 253  * PARAMETERS:  Address             - Table address
 254  *              Table               - Table header
 255  *              Length              - Table length
 256  *              Flags               - flags
 257  *
 258  * RETURN:      Status and table index.
 259  *
 260  * DESCRIPTION: Add an ACPI table to the global table list
 261  *
 262  ******************************************************************************/
 263
 264 acpi_status
 265 acpi_tb_store_table(acpi_physical_address address,
 266                     struct acpi_table_header *table,
 267                     u32 length, u8 flags, acpi_native_uint * table_index)
 268 {
 269         acpi_status status = AE_OK;
 270
 271         /* Ensure that there is room for the table in the Root Table List */
 272
 273         if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) {
 274                 status = acpi_tb_resize_root_table_list();
 275                 if (ACPI_FAILURE(status)) {
 276                         return (status);
 277                 }
 278         }
 279
 280         /* Initialize added table */
 281
 282         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 283             address = address;
 284         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 285             pointer = table;
 286         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].length =
 287             length;
 288         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 289             owner_id = 0;
 290         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].flags =
 291             flags;
 292
 293         ACPI_MOVE_32_TO_32(&
 294                            (acpi_gbl_root_table_list.
 295                             tables[acpi_gbl_root_table_list.count].signature),
 296                            table->signature);
 297
 298         *table_index = acpi_gbl_root_table_list.count;
 299         acpi_gbl_root_table_list.count++;
 300         return (status);
 301 }
 302
 303 /*******************************************************************************
 304  *
 305  * FUNCTION:    acpi_tb_delete_table
 306  *
 307  * PARAMETERS:  table_index         - Table index
 308  *
 309  * RETURN:      None
 310  *
 311  * DESCRIPTION: Delete one internal ACPI table
 312  *
 313  ******************************************************************************/
 314
 315 void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
 316 {
 317         /* Table must be mapped or allocated */
 318         if (!table_desc->pointer) {
 319                 return;
 320         }
 321         switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
 322         case ACPI_TABLE_ORIGIN_MAPPED:
 323                 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
 324                 break;
 325         case ACPI_TABLE_ORIGIN_ALLOCATED:
 326                 ACPI_FREE(table_desc->pointer);
 327                 break;
 328         default:;
 329         }
 330
 331         table_desc->pointer = NULL;
 332 }
 333
 334 /*******************************************************************************
 335  *
 336  * FUNCTION:    acpi_tb_terminate
 337  *
 338  * PARAMETERS:  None
 339  *
 340  * RETURN:      None
 341  *
 342  * DESCRIPTION: Delete all internal ACPI tables
 343  *
 344  ******************************************************************************/
 345
 346 void acpi_tb_terminate(void)
 347 {
 348         acpi_native_uint i;
 349
 350         ACPI_FUNCTION_TRACE(tb_terminate);
 351
 352         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 353
 354         /* Delete the individual tables */
 355
 356         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 357                 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
 358         }
 359
 360         /*
 361          * Delete the root table array if allocated locally. Array cannot be
 362          * mapped, so we don't need to check for that flag.
 363          */
 364         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 365                 ACPI_FREE(acpi_gbl_root_table_list.tables);
 366         }
 367
 368         acpi_gbl_root_table_list.tables = NULL;
 369         acpi_gbl_root_table_list.flags = 0;
 370         acpi_gbl_root_table_list.count = 0;
 371
 372         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 373         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 374 }
 375
 376 /*******************************************************************************
 377  *
 378  * FUNCTION:    acpi_tb_delete_namespace_by_owner
 379  *
 380  * PARAMETERS:  table_index         - Table index
 381  *
 382  * RETURN:      None
 383  *
 384  * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 385  *
 386  ******************************************************************************/
 387
 388 void acpi_tb_delete_namespace_by_owner(acpi_native_uint table_index)
 389 {
 390         acpi_owner_id owner_id;
 391
 392         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 393         if (table_index < acpi_gbl_root_table_list.count) {
 394                 owner_id =
 395                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 396         } else {
 397                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 398                 return;
 399         }
 400
 401         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 402         acpi_ns_delete_namespace_by_owner(owner_id);
 403 }
 404
 405 /*******************************************************************************
 406  *
 407  * FUNCTION:    acpi_tb_allocate_owner_id
 408  *
 409  * PARAMETERS:  table_index         - Table index
 410  *
 411  * RETURN:      Status
 412  *
 413  * DESCRIPTION: Allocates owner_id in table_desc
 414  *
 415  ******************************************************************************/
 416
 417 acpi_status acpi_tb_allocate_owner_id(acpi_native_uint table_index)
 418 {
 419         acpi_status status = AE_BAD_PARAMETER;
 420
 421         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 422
 423         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 424         if (table_index < acpi_gbl_root_table_list.count) {
 425                 status = acpi_ut_allocate_owner_id
 426                     (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
 427         }
 428
 429         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 430         return_ACPI_STATUS(status);
 431 }
 432
 433 /*******************************************************************************
 434  *
 435  * FUNCTION:    acpi_tb_release_owner_id
 436  *
 437  * PARAMETERS:  table_index         - Table index
 438  *
 439  * RETURN:      Status
 440  *
 441  * DESCRIPTION: Releases owner_id in table_desc
 442  *
 443  ******************************************************************************/
 444
 445 acpi_status acpi_tb_release_owner_id(acpi_native_uint table_index)
 446 {
 447         acpi_status status = AE_BAD_PARAMETER;
 448
 449         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 450
 451         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 452         if (table_index < acpi_gbl_root_table_list.count) {
 453                 acpi_ut_release_owner_id(&
 454                                          (acpi_gbl_root_table_list.
 455                                           tables[table_index].owner_id));
 456                 status = AE_OK;
 457         }
 458
 459         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 460         return_ACPI_STATUS(status);
 461 }
 462
 463 /*******************************************************************************
 464  *
 465  * FUNCTION:    acpi_tb_get_owner_id
 466  *
 467  * PARAMETERS:  table_index         - Table index
 468  *              owner_id            - Where the table owner_id is returned
 469  *
 470  * RETURN:      Status
 471  *
 472  * DESCRIPTION: returns owner_id for the ACPI table
 473  *
 474  ******************************************************************************/
 475
 476 acpi_status
 477 acpi_tb_get_owner_id(acpi_native_uint table_index, acpi_owner_id * owner_id)
 478 {
 479         acpi_status status = AE_BAD_PARAMETER;
 480
 481         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 482
 483         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 484         if (table_index < acpi_gbl_root_table_list.count) {
 485                 *owner_id =
 486                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 487                 status = AE_OK;
 488         }
 489
 490         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 491         return_ACPI_STATUS(status);
 492 }
 493
 494 /*******************************************************************************
 495  *
 496  * FUNCTION:    acpi_tb_is_table_loaded
 497  *
 498  * PARAMETERS:  table_index         - Table index
 499  *
 500  * RETURN:      Table Loaded Flag
 501  *
 502  ******************************************************************************/
 503
 504 u8 acpi_tb_is_table_loaded(acpi_native_uint table_index)
 505 {
 506         u8 is_loaded = FALSE;
 507
 508         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 509         if (table_index < acpi_gbl_root_table_list.count) {
 510                 is_loaded = (u8)
 511                     (acpi_gbl_root_table_list.tables[table_index].
 512                      flags & ACPI_TABLE_IS_LOADED);
 513         }
 514
 515         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 516         return (is_loaded);
 517 }
 518
 519 /*******************************************************************************
 520  *
 521  * FUNCTION:    acpi_tb_set_table_loaded_flag
 522  *
 523  * PARAMETERS:  table_index         - Table index
 524  *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 525  *
 526  * RETURN:      None
 527  *
 528  * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 529  *
 530  ******************************************************************************/
 531
 532 void acpi_tb_set_table_loaded_flag(acpi_native_uint table_index, u8 is_loaded)
 533 {
 534
 535         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 536         if (table_index < acpi_gbl_root_table_list.count) {
 537                 if (is_loaded) {
 538                         acpi_gbl_root_table_list.tables[table_index].flags |=
 539                             ACPI_TABLE_IS_LOADED;
 540                 } else {
 541                         acpi_gbl_root_table_list.tables[table_index].flags &=
 542                             ~ACPI_TABLE_IS_LOADED;
 543                 }
 544         }
 545
 546         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 547 }