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