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, u32 *table_index)
 111 {
 112         u32 i;
 113         u32 length;
 114         acpi_status status = AE_OK;
 115
 116         ACPI_FUNCTION_TRACE(tb_add_table);
 117
 118         if (!table_desc->pointer) {
 119                 status = acpi_tb_verify_table(table_desc);
 120                 if (ACPI_FAILURE(status) || !table_desc->pointer) {
 121                         return_ACPI_STATUS(status);
 122                 }
 123         }
 124
 125         /*
 126          * Originally, we checked the table signature for "SSDT" or "PSDT" here.
 127          * Next, we added support for OEMx tables, signature "OEM".
 128          * Valid tables were encountered with a null signature, so we've just
 129          * given up on validating the signature, since it seems to be a waste
 130          * of code. The original code was removed (05/2008).
 131          */
 132
 133         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 134
 135         /* Check if table is already registered */
 136
 137         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 138                 if (!acpi_gbl_root_table_list.tables[i].pointer) {
 139                         status =
 140                             acpi_tb_verify_table(&acpi_gbl_root_table_list.
 141                                                  tables[i]);
 142                         if (ACPI_FAILURE(status)
 143                             || !acpi_gbl_root_table_list.tables[i].pointer) {
 144                                 continue;
 145                         }
 146                 }
 147
 148                 length = ACPI_MIN(table_desc->length,
 149                                   acpi_gbl_root_table_list.tables[i].length);
 150                 if (ACPI_MEMCMP(table_desc->pointer,
 151                                 acpi_gbl_root_table_list.tables[i].pointer,
 152                                 length)) {
 153                         continue;
 154                 }
 155
 156                 /* Table is already registered */
 157
 158                 acpi_tb_delete_table(table_desc);
 159                 *table_index = i;
 160                 status = AE_ALREADY_EXISTS;
 161                 goto release;
 162         }
 163
 164         /*
 165          * Add the table to the global table list
 166          */
 167         status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
 168                                      table_desc->length, table_desc->flags,
 169                                      table_index);
 170         if (ACPI_FAILURE(status)) {
 171                 goto release;
 172         }
 173
 174         acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
 175
 176       release:
 177         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 178         return_ACPI_STATUS(status);
 179 }
 180
 181 /*******************************************************************************
 182  *
 183  * FUNCTION:    acpi_tb_resize_root_table_list
 184  *
 185  * PARAMETERS:  None
 186  *
 187  * RETURN:      Status
 188  *
 189  * DESCRIPTION: Expand the size of global table array
 190  *
 191  ******************************************************************************/
 192
 193 acpi_status acpi_tb_resize_root_table_list(void)
 194 {
 195         struct acpi_table_desc *tables;
 196
 197         ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
 198
 199         /* allow_resize flag is a parameter to acpi_initialize_tables */
 200
 201         if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
 202                 ACPI_ERROR((AE_INFO,
 203                             "Resize of Root Table Array is not allowed"));
 204                 return_ACPI_STATUS(AE_SUPPORT);
 205         }
 206
 207         /* Increase the Table Array size */
 208
 209         tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list.
 210                                        size + ACPI_ROOT_TABLE_SIZE_INCREMENT)
 211                                       * sizeof(struct acpi_table_desc));
 212         if (!tables) {
 213                 ACPI_ERROR((AE_INFO,
 214                             "Could not allocate new root table array"));
 215                 return_ACPI_STATUS(AE_NO_MEMORY);
 216         }
 217
 218         /* Copy and free the previous table array */
 219
 220         if (acpi_gbl_root_table_list.tables) {
 221                 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
 222                             (acpi_size) acpi_gbl_root_table_list.size *
 223                             sizeof(struct acpi_table_desc));
 224
 225                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 226                         ACPI_FREE(acpi_gbl_root_table_list.tables);
 227                 }
 228         }
 229
 230         acpi_gbl_root_table_list.tables = tables;
 231         acpi_gbl_root_table_list.size += ACPI_ROOT_TABLE_SIZE_INCREMENT;
 232         acpi_gbl_root_table_list.flags |= (u8) ACPI_ROOT_ORIGIN_ALLOCATED;
 233
 234         return_ACPI_STATUS(AE_OK);
 235 }
 236
 237 /*******************************************************************************
 238  *
 239  * FUNCTION:    acpi_tb_store_table
 240  *
 241  * PARAMETERS:  Address             - Table address
 242  *              Table               - Table header
 243  *              Length              - Table length
 244  *              Flags               - flags
 245  *
 246  * RETURN:      Status and table index.
 247  *
 248  * DESCRIPTION: Add an ACPI table to the global table list
 249  *
 250  ******************************************************************************/
 251
 252 acpi_status
 253 acpi_tb_store_table(acpi_physical_address address,
 254                     struct acpi_table_header *table,
 255                     u32 length, u8 flags, u32 *table_index)
 256 {
 257         acpi_status status = AE_OK;
 258
 259         /* Ensure that there is room for the table in the Root Table List */
 260
 261         if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) {
 262                 status = acpi_tb_resize_root_table_list();
 263                 if (ACPI_FAILURE(status)) {
 264                         return (status);
 265                 }
 266         }
 267
 268         /* Initialize added table */
 269
 270         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 271             address = address;
 272         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 273             pointer = table;
 274         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].length =
 275             length;
 276         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
 277             owner_id = 0;
 278         acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].flags =
 279             flags;
 280
 281         ACPI_MOVE_32_TO_32(&
 282                            (acpi_gbl_root_table_list.
 283                             tables[acpi_gbl_root_table_list.count].signature),
 284                            table->signature);
 285
 286         *table_index = acpi_gbl_root_table_list.count;
 287         acpi_gbl_root_table_list.count++;
 288         return (status);
 289 }
 290
 291 /*******************************************************************************
 292  *
 293  * FUNCTION:    acpi_tb_delete_table
 294  *
 295  * PARAMETERS:  table_index         - Table index
 296  *
 297  * RETURN:      None
 298  *
 299  * DESCRIPTION: Delete one internal ACPI table
 300  *
 301  ******************************************************************************/
 302
 303 void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
 304 {
 305         /* Table must be mapped or allocated */
 306         if (!table_desc->pointer) {
 307                 return;
 308         }
 309         switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
 310         case ACPI_TABLE_ORIGIN_MAPPED:
 311                 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
 312                 break;
 313         case ACPI_TABLE_ORIGIN_ALLOCATED:
 314                 ACPI_FREE(table_desc->pointer);
 315                 break;
 316         default:;
 317         }
 318
 319         table_desc->pointer = NULL;
 320 }
 321
 322 /*******************************************************************************
 323  *
 324  * FUNCTION:    acpi_tb_terminate
 325  *
 326  * PARAMETERS:  None
 327  *
 328  * RETURN:      None
 329  *
 330  * DESCRIPTION: Delete all internal ACPI tables
 331  *
 332  ******************************************************************************/
 333
 334 void acpi_tb_terminate(void)
 335 {
 336         u32 i;
 337
 338         ACPI_FUNCTION_TRACE(tb_terminate);
 339
 340         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 341
 342         /* Delete the individual tables */
 343
 344         for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 345                 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
 346         }
 347
 348         /*
 349          * Delete the root table array if allocated locally. Array cannot be
 350          * mapped, so we don't need to check for that flag.
 351          */
 352         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 353                 ACPI_FREE(acpi_gbl_root_table_list.tables);
 354         }
 355
 356         acpi_gbl_root_table_list.tables = NULL;
 357         acpi_gbl_root_table_list.flags = 0;
 358         acpi_gbl_root_table_list.count = 0;
 359
 360         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 361         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 362 }
 363
 364 /*******************************************************************************
 365  *
 366  * FUNCTION:    acpi_tb_delete_namespace_by_owner
 367  *
 368  * PARAMETERS:  table_index         - Table index
 369  *
 370  * RETURN:      None
 371  *
 372  * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 373  *
 374  ******************************************************************************/
 375
 376 void acpi_tb_delete_namespace_by_owner(u32 table_index)
 377 {
 378         acpi_owner_id owner_id;
 379
 380         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 381         if (table_index < acpi_gbl_root_table_list.count) {
 382                 owner_id =
 383                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 384         } else {
 385                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 386                 return;
 387         }
 388
 389         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 390         acpi_ns_delete_namespace_by_owner(owner_id);
 391 }
 392
 393 /*******************************************************************************
 394  *
 395  * FUNCTION:    acpi_tb_allocate_owner_id
 396  *
 397  * PARAMETERS:  table_index         - Table index
 398  *
 399  * RETURN:      Status
 400  *
 401  * DESCRIPTION: Allocates owner_id in table_desc
 402  *
 403  ******************************************************************************/
 404
 405 acpi_status acpi_tb_allocate_owner_id(u32 table_index)
 406 {
 407         acpi_status status = AE_BAD_PARAMETER;
 408
 409         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 410
 411         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 412         if (table_index < acpi_gbl_root_table_list.count) {
 413                 status = acpi_ut_allocate_owner_id
 414                     (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
 415         }
 416
 417         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 418         return_ACPI_STATUS(status);
 419 }
 420
 421 /*******************************************************************************
 422  *
 423  * FUNCTION:    acpi_tb_release_owner_id
 424  *
 425  * PARAMETERS:  table_index         - Table index
 426  *
 427  * RETURN:      Status
 428  *
 429  * DESCRIPTION: Releases owner_id in table_desc
 430  *
 431  ******************************************************************************/
 432
 433 acpi_status acpi_tb_release_owner_id(u32 table_index)
 434 {
 435         acpi_status status = AE_BAD_PARAMETER;
 436
 437         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 438
 439         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 440         if (table_index < acpi_gbl_root_table_list.count) {
 441                 acpi_ut_release_owner_id(&
 442                                          (acpi_gbl_root_table_list.
 443                                           tables[table_index].owner_id));
 444                 status = AE_OK;
 445         }
 446
 447         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 448         return_ACPI_STATUS(status);
 449 }
 450
 451 /*******************************************************************************
 452  *
 453  * FUNCTION:    acpi_tb_get_owner_id
 454  *
 455  * PARAMETERS:  table_index         - Table index
 456  *              owner_id            - Where the table owner_id is returned
 457  *
 458  * RETURN:      Status
 459  *
 460  * DESCRIPTION: returns owner_id for the ACPI table
 461  *
 462  ******************************************************************************/
 463
 464 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
 465 {
 466         acpi_status status = AE_BAD_PARAMETER;
 467
 468         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 469
 470         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 471         if (table_index < acpi_gbl_root_table_list.count) {
 472                 *owner_id =
 473                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 474                 status = AE_OK;
 475         }
 476
 477         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 478         return_ACPI_STATUS(status);
 479 }
 480
 481 /*******************************************************************************
 482  *
 483  * FUNCTION:    acpi_tb_is_table_loaded
 484  *
 485  * PARAMETERS:  table_index         - Table index
 486  *
 487  * RETURN:      Table Loaded Flag
 488  *
 489  ******************************************************************************/
 490
 491 u8 acpi_tb_is_table_loaded(u32 table_index)
 492 {
 493         u8 is_loaded = FALSE;
 494
 495         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 496         if (table_index < acpi_gbl_root_table_list.count) {
 497                 is_loaded = (u8)
 498                     (acpi_gbl_root_table_list.tables[table_index].
 499                      flags & ACPI_TABLE_IS_LOADED);
 500         }
 501
 502         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 503         return (is_loaded);
 504 }
 505
 506 /*******************************************************************************
 507  *
 508  * FUNCTION:    acpi_tb_set_table_loaded_flag
 509  *
 510  * PARAMETERS:  table_index         - Table index
 511  *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 512  *
 513  * RETURN:      None
 514  *
 515  * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 516  *
 517  ******************************************************************************/
 518
 519 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
 520 {
 521
 522         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 523         if (table_index < acpi_gbl_root_table_list.count) {
 524                 if (is_loaded) {
 525                         acpi_gbl_root_table_list.tables[table_index].flags |=
 526                             ACPI_TABLE_IS_LOADED;
 527                 } else {
 528                         acpi_gbl_root_table_list.tables[table_index].flags &=
 529                             ~ACPI_TABLE_IS_LOADED;
 530                 }
 531         }
 532
 533         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 534 }