drivers/acpi/acpica/tbdata.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbdata - Table manager data structure functions
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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 "accommon.h"
  46 #include "acnamesp.h"
  47 #include "actables.h"
  48 #include "acevents.h"
  49
  50 #define _COMPONENT          ACPI_TABLES
  51 ACPI_MODULE_NAME("tbdata")
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_tb_init_table_descriptor
  56  *
  57  * PARAMETERS:  table_desc              - Table descriptor
  58  *              address                 - Physical address of the table
  59  *              flags                   - Allocation flags of the table
  60  *              table                   - Pointer to the table
  61  *
  62  * RETURN:      None
  63  *
  64  * DESCRIPTION: Initialize a new table descriptor
  65  *
  66  ******************************************************************************/
  67 void
  68 acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
  69                               acpi_physical_address address,
  70                               u8 flags, struct acpi_table_header *table)
  71 {
  72
  73         /*
  74          * Initialize the table descriptor. Set the pointer to NULL, since the
  75          * table is not fully mapped at this time.
  76          */
  77         memset(table_desc, 0, sizeof(struct acpi_table_desc));
  78         table_desc->address = address;
  79         table_desc->length = table->length;
  80         table_desc->flags = flags;
  81         ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
  82 }
  83
  84 /*******************************************************************************
  85  *
  86  * FUNCTION:    acpi_tb_acquire_table
  87  *
  88  * PARAMETERS:  table_desc          - Table descriptor
  89  *              table_ptr           - Where table is returned
  90  *              table_length        - Where table length is returned
  91  *              table_flags         - Where table allocation flags are returned
  92  *
  93  * RETURN:      Status
  94  *
  95  * DESCRIPTION: Acquire an ACPI table. It can be used for tables not
  96  *              maintained in the acpi_gbl_root_table_list.
  97  *
  98  ******************************************************************************/
  99
 100 acpi_status
 101 acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
 102                       struct acpi_table_header **table_ptr,
 103                       u32 *table_length, u8 *table_flags)
 104 {
 105         struct acpi_table_header *table = NULL;
 106
 107         switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
 108         case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
 109
 110                 table =
 111                     acpi_os_map_memory(table_desc->address, table_desc->length);
 112                 break;
 113
 114         case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 115         case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
 116
 117                 table = ACPI_CAST_PTR(struct acpi_table_header,
 118                                       ACPI_PHYSADDR_TO_PTR(table_desc->
 119                                                            address));
 120                 break;
 121
 122         default:
 123
 124                 break;
 125         }
 126
 127         /* Table is not valid yet */
 128
 129         if (!table) {
 130                 return (AE_NO_MEMORY);
 131         }
 132
 133         /* Fill the return values */
 134
 135         *table_ptr = table;
 136         *table_length = table_desc->length;
 137         *table_flags = table_desc->flags;
 138         return (AE_OK);
 139 }
 140
 141 /*******************************************************************************
 142  *
 143  * FUNCTION:    acpi_tb_release_table
 144  *
 145  * PARAMETERS:  table               - Pointer for the table
 146  *              table_length        - Length for the table
 147  *              table_flags         - Allocation flags for the table
 148  *
 149  * RETURN:      None
 150  *
 151  * DESCRIPTION: Release a table. The inverse of acpi_tb_acquire_table().
 152  *
 153  ******************************************************************************/
 154
 155 void
 156 acpi_tb_release_table(struct acpi_table_header *table,
 157                       u32 table_length, u8 table_flags)
 158 {
 159
 160         switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
 161         case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
 162
 163                 acpi_os_unmap_memory(table, table_length);
 164                 break;
 165
 166         case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 167         case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
 168         default:
 169
 170                 break;
 171         }
 172 }
 173
 174 /*******************************************************************************
 175  *
 176  * FUNCTION:    acpi_tb_acquire_temp_table
 177  *
 178  * PARAMETERS:  table_desc          - Table descriptor to be acquired
 179  *              address             - Address of the table
 180  *              flags               - Allocation flags of the table
 181  *
 182  * RETURN:      Status
 183  *
 184  * DESCRIPTION: This function validates the table header to obtain the length
 185  *              of a table and fills the table descriptor to make its state as
 186  *              "INSTALLED". Such a table descriptor is only used for verified
 187  *              installation.
 188  *
 189  ******************************************************************************/
 190
 191 acpi_status
 192 acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
 193                            acpi_physical_address address, u8 flags)
 194 {
 195         struct acpi_table_header *table_header;
 196
 197         switch (flags & ACPI_TABLE_ORIGIN_MASK) {
 198         case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
 199
 200                 /* Get the length of the full table from the header */
 201
 202                 table_header =
 203                     acpi_os_map_memory(address,
 204                                        sizeof(struct acpi_table_header));
 205                 if (!table_header) {
 206                         return (AE_NO_MEMORY);
 207                 }
 208
 209                 acpi_tb_init_table_descriptor(table_desc, address, flags,
 210                                               table_header);
 211                 acpi_os_unmap_memory(table_header,
 212                                      sizeof(struct acpi_table_header));
 213                 return (AE_OK);
 214
 215         case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 216         case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
 217
 218                 table_header = ACPI_CAST_PTR(struct acpi_table_header,
 219                                              ACPI_PHYSADDR_TO_PTR(address));
 220                 if (!table_header) {
 221                         return (AE_NO_MEMORY);
 222                 }
 223
 224                 acpi_tb_init_table_descriptor(table_desc, address, flags,
 225                                               table_header);
 226                 return (AE_OK);
 227
 228         default:
 229
 230                 break;
 231         }
 232
 233         /* Table is not valid yet */
 234
 235         return (AE_NO_MEMORY);
 236 }
 237
 238 /*******************************************************************************
 239  *
 240  * FUNCTION:    acpi_tb_release_temp_table
 241  *
 242  * PARAMETERS:  table_desc          - Table descriptor to be released
 243  *
 244  * RETURN:      Status
 245  *
 246  * DESCRIPTION: The inverse of acpi_tb_acquire_temp_table().
 247  *
 248  *****************************************************************************/
 249
 250 void acpi_tb_release_temp_table(struct acpi_table_desc *table_desc)
 251 {
 252
 253         /*
 254          * Note that the .Address is maintained by the callers of
 255          * acpi_tb_acquire_temp_table(), thus do not invoke acpi_tb_uninstall_table()
 256          * where .Address will be freed.
 257          */
 258         acpi_tb_invalidate_table(table_desc);
 259 }
 260
 261 /******************************************************************************
 262  *
 263  * FUNCTION:    acpi_tb_validate_table
 264  *
 265  * PARAMETERS:  table_desc          - Table descriptor
 266  *
 267  * RETURN:      Status
 268  *
 269  * DESCRIPTION: This function is called to validate the table, the returned
 270  *              table descriptor is in "VALIDATED" state.
 271  *
 272  *****************************************************************************/
 273
 274 acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
 275 {
 276         acpi_status status = AE_OK;
 277
 278         ACPI_FUNCTION_TRACE(tb_validate_table);
 279
 280         /* Validate the table if necessary */
 281
 282         if (!table_desc->pointer) {
 283                 status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
 284                                                &table_desc->length,
 285                                                &table_desc->flags);
 286                 if (!table_desc->pointer) {
 287                         status = AE_NO_MEMORY;
 288                 }
 289         }
 290
 291         return_ACPI_STATUS(status);
 292 }
 293
 294 /*******************************************************************************
 295  *
 296  * FUNCTION:    acpi_tb_invalidate_table
 297  *
 298  * PARAMETERS:  table_desc          - Table descriptor
 299  *
 300  * RETURN:      None
 301  *
 302  * DESCRIPTION: Invalidate one internal ACPI table, this is the inverse of
 303  *              acpi_tb_validate_table().
 304  *
 305  ******************************************************************************/
 306
 307 void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
 308 {
 309
 310         ACPI_FUNCTION_TRACE(tb_invalidate_table);
 311
 312         /* Table must be validated */
 313
 314         if (!table_desc->pointer) {
 315                 return_VOID;
 316         }
 317
 318         acpi_tb_release_table(table_desc->pointer, table_desc->length,
 319                               table_desc->flags);
 320         table_desc->pointer = NULL;
 321
 322         return_VOID;
 323 }
 324
 325 /******************************************************************************
 326  *
 327  * FUNCTION:    acpi_tb_validate_temp_table
 328  *
 329  * PARAMETERS:  table_desc          - Table descriptor
 330  *
 331  * RETURN:      Status
 332  *
 333  * DESCRIPTION: This function is called to validate the table, the returned
 334  *              table descriptor is in "VALIDATED" state.
 335  *
 336  *****************************************************************************/
 337
 338 acpi_status acpi_tb_validate_temp_table(struct acpi_table_desc *table_desc)
 339 {
 340
 341         if (!table_desc->pointer && !acpi_gbl_verify_table_checksum) {
 342                 /*
 343                  * Only validates the header of the table.
 344                  * Note that Length contains the size of the mapping after invoking
 345                  * this work around, this value is required by
 346                  * acpi_tb_release_temp_table().
 347                  * We can do this because in acpi_init_table_descriptor(), the Length
 348                  * field of the installed descriptor is filled with the actual
 349                  * table length obtaining from the table header.
 350                  */
 351                 table_desc->length = sizeof(struct acpi_table_header);
 352         }
 353
 354         return (acpi_tb_validate_table(table_desc));
 355 }
 356
 357 /******************************************************************************
 358  *
 359  * FUNCTION:    acpi_tb_verify_temp_table
 360  *
 361  * PARAMETERS:  table_desc          - Table descriptor
 362  *              signature           - Table signature to verify
 363  *
 364  * RETURN:      Status
 365  *
 366  * DESCRIPTION: This function is called to validate and verify the table, the
 367  *              returned table descriptor is in "VALIDATED" state.
 368  *
 369  *****************************************************************************/
 370
 371 acpi_status
 372 acpi_tb_verify_temp_table(struct acpi_table_desc *table_desc, char *signature)
 373 {
 374         acpi_status status = AE_OK;
 375
 376         ACPI_FUNCTION_TRACE(tb_verify_temp_table);
 377
 378         /* Validate the table */
 379
 380         status = acpi_tb_validate_temp_table(table_desc);
 381         if (ACPI_FAILURE(status)) {
 382                 return_ACPI_STATUS(AE_NO_MEMORY);
 383         }
 384
 385         /* If a particular signature is expected (DSDT/FACS), it must match */
 386
 387         if (signature && !ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
 388                 ACPI_BIOS_ERROR((AE_INFO,
 389                                  "Invalid signature 0x%X for ACPI table, expected [%s]",
 390                                  table_desc->signature.integer, signature));
 391                 status = AE_BAD_SIGNATURE;
 392                 goto invalidate_and_exit;
 393         }
 394
 395         /* Verify the checksum */
 396
 397         if (acpi_gbl_verify_table_checksum) {
 398                 status =
 399                     acpi_tb_verify_checksum(table_desc->pointer,
 400                                             table_desc->length);
 401                 if (ACPI_FAILURE(status)) {
 402                         ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
 403                                         "%4.4s 0x%8.8X%8.8X"
 404                                         " Attempted table install failed",
 405                                         acpi_ut_valid_nameseg(table_desc->
 406                                                               signature.
 407                                                               ascii) ?
 408                                         table_desc->signature.ascii : "????",
 409                                         ACPI_FORMAT_UINT64(table_desc->
 410                                                            address)));
 411
 412                         goto invalidate_and_exit;
 413                 }
 414         }
 415
 416         return_ACPI_STATUS(AE_OK);
 417
 418 invalidate_and_exit:
 419         acpi_tb_invalidate_table(table_desc);
 420         return_ACPI_STATUS(status);
 421 }
 422
 423 /*******************************************************************************
 424  *
 425  * FUNCTION:    acpi_tb_resize_root_table_list
 426  *
 427  * PARAMETERS:  None
 428  *
 429  * RETURN:      Status
 430  *
 431  * DESCRIPTION: Expand the size of global table array
 432  *
 433  ******************************************************************************/
 434
 435 acpi_status acpi_tb_resize_root_table_list(void)
 436 {
 437         struct acpi_table_desc *tables;
 438         u32 table_count;
 439
 440         ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
 441
 442         /* allow_resize flag is a parameter to acpi_initialize_tables */
 443
 444         if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
 445                 ACPI_ERROR((AE_INFO,
 446                             "Resize of Root Table Array is not allowed"));
 447                 return_ACPI_STATUS(AE_SUPPORT);
 448         }
 449
 450         /* Increase the Table Array size */
 451
 452         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 453                 table_count = acpi_gbl_root_table_list.max_table_count;
 454         } else {
 455                 table_count = acpi_gbl_root_table_list.current_table_count;
 456         }
 457
 458         tables = ACPI_ALLOCATE_ZEROED(((acpi_size)table_count +
 459                                        ACPI_ROOT_TABLE_SIZE_INCREMENT) *
 460                                       sizeof(struct acpi_table_desc));
 461         if (!tables) {
 462                 ACPI_ERROR((AE_INFO,
 463                             "Could not allocate new root table array"));
 464                 return_ACPI_STATUS(AE_NO_MEMORY);
 465         }
 466
 467         /* Copy and free the previous table array */
 468
 469         if (acpi_gbl_root_table_list.tables) {
 470                 memcpy(tables, acpi_gbl_root_table_list.tables,
 471                        (acpi_size)table_count * sizeof(struct acpi_table_desc));
 472
 473                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 474                         ACPI_FREE(acpi_gbl_root_table_list.tables);
 475                 }
 476         }
 477
 478         acpi_gbl_root_table_list.tables = tables;
 479         acpi_gbl_root_table_list.max_table_count =
 480             table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
 481         acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
 482
 483         return_ACPI_STATUS(AE_OK);
 484 }
 485
 486 /*******************************************************************************
 487  *
 488  * FUNCTION:    acpi_tb_get_next_table_descriptor
 489  *
 490  * PARAMETERS:  table_index         - Where table index is returned
 491  *              table_desc          - Where table descriptor is returned
 492  *
 493  * RETURN:      Status and table index/descriptor.
 494  *
 495  * DESCRIPTION: Allocate a new ACPI table entry to the global table list
 496  *
 497  ******************************************************************************/
 498
 499 acpi_status
 500 acpi_tb_get_next_table_descriptor(u32 *table_index,
 501                                   struct acpi_table_desc **table_desc)
 502 {
 503         acpi_status status;
 504         u32 i;
 505
 506         /* Ensure that there is room for the table in the Root Table List */
 507
 508         if (acpi_gbl_root_table_list.current_table_count >=
 509             acpi_gbl_root_table_list.max_table_count) {
 510                 status = acpi_tb_resize_root_table_list();
 511                 if (ACPI_FAILURE(status)) {
 512                         return (status);
 513                 }
 514         }
 515
 516         i = acpi_gbl_root_table_list.current_table_count;
 517         acpi_gbl_root_table_list.current_table_count++;
 518
 519         if (table_index) {
 520                 *table_index = i;
 521         }
 522         if (table_desc) {
 523                 *table_desc = &acpi_gbl_root_table_list.tables[i];
 524         }
 525
 526         return (AE_OK);
 527 }
 528
 529 /*******************************************************************************
 530  *
 531  * FUNCTION:    acpi_tb_terminate
 532  *
 533  * PARAMETERS:  None
 534  *
 535  * RETURN:      None
 536  *
 537  * DESCRIPTION: Delete all internal ACPI tables
 538  *
 539  ******************************************************************************/
 540
 541 void acpi_tb_terminate(void)
 542 {
 543         u32 i;
 544
 545         ACPI_FUNCTION_TRACE(tb_terminate);
 546
 547         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 548
 549         /* Delete the individual tables */
 550
 551         for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
 552                 acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
 553         }
 554
 555         /*
 556          * Delete the root table array if allocated locally. Array cannot be
 557          * mapped, so we don't need to check for that flag.
 558          */
 559         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 560                 ACPI_FREE(acpi_gbl_root_table_list.tables);
 561         }
 562
 563         acpi_gbl_root_table_list.tables = NULL;
 564         acpi_gbl_root_table_list.flags = 0;
 565         acpi_gbl_root_table_list.current_table_count = 0;
 566
 567         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 568
 569         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 570         return_VOID;
 571 }
 572
 573 /*******************************************************************************
 574  *
 575  * FUNCTION:    acpi_tb_delete_namespace_by_owner
 576  *
 577  * PARAMETERS:  table_index         - Table index
 578  *
 579  * RETURN:      Status
 580  *
 581  * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 582  *
 583  ******************************************************************************/
 584
 585 acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
 586 {
 587         acpi_owner_id owner_id;
 588         acpi_status status;
 589
 590         ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
 591
 592         status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 593         if (ACPI_FAILURE(status)) {
 594                 return_ACPI_STATUS(status);
 595         }
 596
 597         if (table_index >= acpi_gbl_root_table_list.current_table_count) {
 598
 599                 /* The table index does not exist */
 600
 601                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 602                 return_ACPI_STATUS(AE_NOT_EXIST);
 603         }
 604
 605         /* Get the owner ID for this table, used to delete namespace nodes */
 606
 607         owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
 608         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 609
 610         /*
 611          * Need to acquire the namespace writer lock to prevent interference
 612          * with any concurrent namespace walks. The interpreter must be
 613          * released during the deletion since the acquisition of the deletion
 614          * lock may block, and also since the execution of a namespace walk
 615          * must be allowed to use the interpreter.
 616          */
 617         status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
 618         if (ACPI_FAILURE(status)) {
 619                 return_ACPI_STATUS(status);
 620         }
 621         acpi_ns_delete_namespace_by_owner(owner_id);
 622         acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
 623         return_ACPI_STATUS(status);
 624 }
 625
 626 /*******************************************************************************
 627  *
 628  * FUNCTION:    acpi_tb_allocate_owner_id
 629  *
 630  * PARAMETERS:  table_index         - Table index
 631  *
 632  * RETURN:      Status
 633  *
 634  * DESCRIPTION: Allocates owner_id in table_desc
 635  *
 636  ******************************************************************************/
 637
 638 acpi_status acpi_tb_allocate_owner_id(u32 table_index)
 639 {
 640         acpi_status status = AE_BAD_PARAMETER;
 641
 642         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 643
 644         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 645         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 646                 status =
 647                     acpi_ut_allocate_owner_id(&
 648                                               (acpi_gbl_root_table_list.
 649                                                tables[table_index].owner_id));
 650         }
 651
 652         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 653         return_ACPI_STATUS(status);
 654 }
 655
 656 /*******************************************************************************
 657  *
 658  * FUNCTION:    acpi_tb_release_owner_id
 659  *
 660  * PARAMETERS:  table_index         - Table index
 661  *
 662  * RETURN:      Status
 663  *
 664  * DESCRIPTION: Releases owner_id in table_desc
 665  *
 666  ******************************************************************************/
 667
 668 acpi_status acpi_tb_release_owner_id(u32 table_index)
 669 {
 670         acpi_status status = AE_BAD_PARAMETER;
 671
 672         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 673
 674         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 675         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 676                 acpi_ut_release_owner_id(&
 677                                          (acpi_gbl_root_table_list.
 678                                           tables[table_index].owner_id));
 679                 status = AE_OK;
 680         }
 681
 682         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 683         return_ACPI_STATUS(status);
 684 }
 685
 686 /*******************************************************************************
 687  *
 688  * FUNCTION:    acpi_tb_get_owner_id
 689  *
 690  * PARAMETERS:  table_index         - Table index
 691  *              owner_id            - Where the table owner_id is returned
 692  *
 693  * RETURN:      Status
 694  *
 695  * DESCRIPTION: returns owner_id for the ACPI table
 696  *
 697  ******************************************************************************/
 698
 699 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
 700 {
 701         acpi_status status = AE_BAD_PARAMETER;
 702
 703         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 704
 705         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 706         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 707                 *owner_id =
 708                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 709                 status = AE_OK;
 710         }
 711
 712         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 713         return_ACPI_STATUS(status);
 714 }
 715
 716 /*******************************************************************************
 717  *
 718  * FUNCTION:    acpi_tb_is_table_loaded
 719  *
 720  * PARAMETERS:  table_index         - Index into the root table
 721  *
 722  * RETURN:      Table Loaded Flag
 723  *
 724  ******************************************************************************/
 725
 726 u8 acpi_tb_is_table_loaded(u32 table_index)
 727 {
 728         u8 is_loaded = FALSE;
 729
 730         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 731         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 732                 is_loaded = (u8)
 733                     (acpi_gbl_root_table_list.tables[table_index].flags &
 734                      ACPI_TABLE_IS_LOADED);
 735         }
 736
 737         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 738         return (is_loaded);
 739 }
 740
 741 /*******************************************************************************
 742  *
 743  * FUNCTION:    acpi_tb_set_table_loaded_flag
 744  *
 745  * PARAMETERS:  table_index         - Table index
 746  *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 747  *
 748  * RETURN:      None
 749  *
 750  * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 751  *
 752  ******************************************************************************/
 753
 754 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
 755 {
 756
 757         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 758         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 759                 if (is_loaded) {
 760                         acpi_gbl_root_table_list.tables[table_index].flags |=
 761                             ACPI_TABLE_IS_LOADED;
 762                 } else {
 763                         acpi_gbl_root_table_list.tables[table_index].flags &=
 764                             ~ACPI_TABLE_IS_LOADED;
 765                 }
 766         }
 767
 768         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 769 }
 770
 771 /*******************************************************************************
 772  *
 773  * FUNCTION:    acpi_tb_load_table
 774  *
 775  * PARAMETERS:  table_index             - Table index
 776  *              parent_node             - Where table index is returned
 777  *
 778  * RETURN:      Status
 779  *
 780  * DESCRIPTION: Load an ACPI table
 781  *
 782  ******************************************************************************/
 783
 784 acpi_status
 785 acpi_tb_load_table(u32 table_index, struct acpi_namespace_node *parent_node)
 786 {
 787         struct acpi_table_header *table;
 788         acpi_status status;
 789         acpi_owner_id owner_id;
 790
 791         ACPI_FUNCTION_TRACE(tb_load_table);
 792
 793         /*
 794          * Note: Now table is "INSTALLED", it must be validated before
 795          * using.
 796          */
 797         status = acpi_get_table_by_index(table_index, &table);
 798         if (ACPI_FAILURE(status)) {
 799                 return_ACPI_STATUS(status);
 800         }
 801
 802         status = acpi_ns_load_table(table_index, parent_node);
 803
 804         /* Execute any module-level code that was found in the table */
 805
 806         if (!acpi_gbl_parse_table_as_term_list
 807             && acpi_gbl_group_module_level_code) {
 808                 acpi_ns_exec_module_code_list();
 809         }
 810
 811         /*
 812          * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
 813          * responsible for discovering any new wake GPEs by running _PRW methods
 814          * that may have been loaded by this table.
 815          */
 816         status = acpi_tb_get_owner_id(table_index, &owner_id);
 817         if (ACPI_SUCCESS(status)) {
 818                 acpi_ev_update_gpes(owner_id);
 819         }
 820
 821         /* Invoke table handler if present */
 822
 823         if (acpi_gbl_table_handler) {
 824                 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
 825                                              acpi_gbl_table_handler_context);
 826         }
 827
 828         return_ACPI_STATUS(status);
 829 }
 830
 831 /*******************************************************************************
 832  *
 833  * FUNCTION:    acpi_tb_install_and_load_table
 834  *
 835  * PARAMETERS:  address                 - Physical address of the table
 836  *              flags                   - Allocation flags of the table
 837  *              override                - Whether override should be performed
 838  *              table_index             - Where table index is returned
 839  *
 840  * RETURN:      Status
 841  *
 842  * DESCRIPTION: Install and load an ACPI table
 843  *
 844  ******************************************************************************/
 845
 846 acpi_status
 847 acpi_tb_install_and_load_table(acpi_physical_address address,
 848                                u8 flags, u8 override, u32 *table_index)
 849 {
 850         acpi_status status;
 851         u32 i;
 852
 853         ACPI_FUNCTION_TRACE(tb_install_and_load_table);
 854
 855         /* Install the table and load it into the namespace */
 856
 857         status = acpi_tb_install_standard_table(address, flags, TRUE,
 858                                                 override, &i);
 859         if (ACPI_FAILURE(status)) {
 860                 goto exit;
 861         }
 862
 863         status = acpi_tb_load_table(i, acpi_gbl_root_node);
 864
 865 exit:
 866         *table_index = i;
 867         return_ACPI_STATUS(status);
 868 }
 869
 870 /*******************************************************************************
 871  *
 872  * FUNCTION:    acpi_tb_unload_table
 873  *
 874  * PARAMETERS:  table_index             - Table index
 875  *
 876  * RETURN:      Status
 877  *
 878  * DESCRIPTION: Unload an ACPI table
 879  *
 880  ******************************************************************************/
 881
 882 acpi_status acpi_tb_unload_table(u32 table_index)
 883 {
 884         acpi_status status = AE_OK;
 885         struct acpi_table_header *table;
 886
 887         ACPI_FUNCTION_TRACE(tb_unload_table);
 888
 889         /* Ensure the table is still loaded */
 890
 891         if (!acpi_tb_is_table_loaded(table_index)) {
 892                 return_ACPI_STATUS(AE_NOT_EXIST);
 893         }
 894
 895         /* Invoke table handler if present */
 896
 897         if (acpi_gbl_table_handler) {
 898                 status = acpi_get_table_by_index(table_index, &table);
 899                 if (ACPI_SUCCESS(status)) {
 900                         (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
 901                                                      table,
 902                                                      acpi_gbl_table_handler_context);
 903                 }
 904         }
 905
 906         /* Delete the portion of the namespace owned by this table */
 907
 908         status = acpi_tb_delete_namespace_by_owner(table_index);
 909         if (ACPI_FAILURE(status)) {
 910                 return_ACPI_STATUS(status);
 911         }
 912
 913         (void)acpi_tb_release_owner_id(table_index);
 914         acpi_tb_set_table_loaded_flag(table_index, FALSE);
 915         return_ACPI_STATUS(status);
 916 }