drivers/acpi/utilities/utalloc.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utalloc - local memory allocation routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, 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
  46 #define _COMPONENT          ACPI_UTILITIES
  47 ACPI_MODULE_NAME("utalloc")
  48
  49 /* Local prototypes */
  50 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  51 static struct acpi_debug_mem_block *acpi_ut_find_allocation(void *allocation);
  52
  53 static acpi_status
  54 acpi_ut_track_allocation(struct acpi_debug_mem_block *address,
  55                          acpi_size size,
  56                          u8 alloc_type, u32 component, char *module, u32 line);
  57
  58 static acpi_status
  59 acpi_ut_remove_allocation(struct acpi_debug_mem_block *address,
  60                           u32 component, char *module, u32 line);
  61
  62 static acpi_status
  63 acpi_ut_create_list(char *list_name,
  64                     u16 object_size, struct acpi_memory_list **return_cache);
  65 #endif
  66
  67 /*******************************************************************************
  68  *
  69  * FUNCTION:    acpi_ut_create_caches
  70  *
  71  * PARAMETERS:  None
  72  *
  73  * RETURN:      Status
  74  *
  75  * DESCRIPTION: Create all local caches
  76  *
  77  ******************************************************************************/
  78
  79 acpi_status acpi_ut_create_caches(void)
  80 {
  81         acpi_status status;
  82
  83 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  84
  85         /* Memory allocation lists */
  86
  87         status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
  88         if (ACPI_FAILURE(status)) {
  89                 return (status);
  90         }
  91
  92         status =
  93             acpi_ut_create_list("Acpi-Namespace",
  94                                 sizeof(struct acpi_namespace_node),
  95                                 &acpi_gbl_ns_node_list);
  96         if (ACPI_FAILURE(status)) {
  97                 return (status);
  98         }
  99 #endif
 100
 101         /* Object Caches, for frequently used objects */
 102
 103         status =
 104             acpi_os_create_cache("acpi_state", sizeof(union acpi_generic_state),
 105                                  ACPI_MAX_STATE_CACHE_DEPTH,
 106                                  &acpi_gbl_state_cache);
 107         if (ACPI_FAILURE(status)) {
 108                 return (status);
 109         }
 110
 111         status =
 112             acpi_os_create_cache("acpi_parse",
 113                                  sizeof(struct acpi_parse_obj_common),
 114                                  ACPI_MAX_PARSE_CACHE_DEPTH,
 115                                  &acpi_gbl_ps_node_cache);
 116         if (ACPI_FAILURE(status)) {
 117                 return (status);
 118         }
 119
 120         status =
 121             acpi_os_create_cache("acpi_parse_ext",
 122                                  sizeof(struct acpi_parse_obj_named),
 123                                  ACPI_MAX_EXTPARSE_CACHE_DEPTH,
 124                                  &acpi_gbl_ps_node_ext_cache);
 125         if (ACPI_FAILURE(status)) {
 126                 return (status);
 127         }
 128
 129         status =
 130             acpi_os_create_cache("acpi_operand",
 131                                  sizeof(union acpi_operand_object),
 132                                  ACPI_MAX_OBJECT_CACHE_DEPTH,
 133                                  &acpi_gbl_operand_cache);
 134         if (ACPI_FAILURE(status)) {
 135                 return (status);
 136         }
 137
 138         return (AE_OK);
 139 }
 140
 141 /*******************************************************************************
 142  *
 143  * FUNCTION:    acpi_ut_delete_caches
 144  *
 145  * PARAMETERS:  None
 146  *
 147  * RETURN:      Status
 148  *
 149  * DESCRIPTION: Purge and delete all local caches
 150  *
 151  ******************************************************************************/
 152
 153 acpi_status acpi_ut_delete_caches(void)
 154 {
 155
 156         (void)acpi_os_delete_cache(acpi_gbl_state_cache);
 157         acpi_gbl_state_cache = NULL;
 158
 159         (void)acpi_os_delete_cache(acpi_gbl_operand_cache);
 160         acpi_gbl_operand_cache = NULL;
 161
 162         (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
 163         acpi_gbl_ps_node_cache = NULL;
 164
 165         (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
 166         acpi_gbl_ps_node_ext_cache = NULL;
 167
 168         return (AE_OK);
 169 }
 170
 171 /*******************************************************************************
 172  *
 173  * FUNCTION:    acpi_ut_validate_buffer
 174  *
 175  * PARAMETERS:  Buffer              - Buffer descriptor to be validated
 176  *
 177  * RETURN:      Status
 178  *
 179  * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
 180  *
 181  ******************************************************************************/
 182
 183 acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer)
 184 {
 185
 186         /* Obviously, the structure pointer must be valid */
 187
 188         if (!buffer) {
 189                 return (AE_BAD_PARAMETER);
 190         }
 191
 192         /* Special semantics for the length */
 193
 194         if ((buffer->length == ACPI_NO_BUFFER) ||
 195             (buffer->length == ACPI_ALLOCATE_BUFFER) ||
 196             (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
 197                 return (AE_OK);
 198         }
 199
 200         /* Length is valid, the buffer pointer must be also */
 201
 202         if (!buffer->pointer) {
 203                 return (AE_BAD_PARAMETER);
 204         }
 205
 206         return (AE_OK);
 207 }
 208
 209 /*******************************************************************************
 210  *
 211  * FUNCTION:    acpi_ut_initialize_buffer
 212  *
 213  * PARAMETERS:  Buffer              - Buffer to be validated
 214  *              required_length     - Length needed
 215  *
 216  * RETURN:      Status
 217  *
 218  * DESCRIPTION: Validate that the buffer is of the required length or
 219  *              allocate a new buffer.  Returned buffer is always zeroed.
 220  *
 221  ******************************************************************************/
 222
 223 acpi_status
 224 acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
 225                           acpi_size required_length)
 226 {
 227         acpi_status status = AE_OK;
 228
 229         switch (buffer->length) {
 230         case ACPI_NO_BUFFER:
 231
 232                 /* Set the exception and returned the required length */
 233
 234                 status = AE_BUFFER_OVERFLOW;
 235                 break;
 236
 237         case ACPI_ALLOCATE_BUFFER:
 238
 239                 /* Allocate a new buffer */
 240
 241                 buffer->pointer = acpi_os_allocate(required_length);
 242                 if (!buffer->pointer) {
 243                         return (AE_NO_MEMORY);
 244                 }
 245
 246                 /* Clear the buffer */
 247
 248                 ACPI_MEMSET(buffer->pointer, 0, required_length);
 249                 break;
 250
 251         case ACPI_ALLOCATE_LOCAL_BUFFER:
 252
 253                 /* Allocate a new buffer with local interface to allow tracking */
 254
 255                 buffer->pointer = ACPI_MEM_CALLOCATE(required_length);
 256                 if (!buffer->pointer) {
 257                         return (AE_NO_MEMORY);
 258                 }
 259                 break;
 260
 261         default:
 262
 263                 /* Existing buffer: Validate the size of the buffer */
 264
 265                 if (buffer->length < required_length) {
 266                         status = AE_BUFFER_OVERFLOW;
 267                         break;
 268                 }
 269
 270                 /* Clear the buffer */
 271
 272                 ACPI_MEMSET(buffer->pointer, 0, required_length);
 273                 break;
 274         }
 275
 276         buffer->length = required_length;
 277         return (status);
 278 }
 279
 280 /*******************************************************************************
 281  *
 282  * FUNCTION:    acpi_ut_allocate
 283  *
 284  * PARAMETERS:  Size                - Size of the allocation
 285  *              Component           - Component type of caller
 286  *              Module              - Source file name of caller
 287  *              Line                - Line number of caller
 288  *
 289  * RETURN:      Address of the allocated memory on success, NULL on failure.
 290  *
 291  * DESCRIPTION: The subsystem's equivalent of malloc.
 292  *
 293  ******************************************************************************/
 294
 295 void *acpi_ut_allocate(acpi_size size, u32 component, char *module, u32 line)
 296 {
 297         void *allocation;
 298
 299         ACPI_FUNCTION_TRACE_U32("ut_allocate", size);
 300
 301         /* Check for an inadvertent size of zero bytes */
 302
 303         if (!size) {
 304                 ACPI_ERROR((module, line,
 305                             "ut_allocate: Attempt to allocate zero bytes, allocating 1 byte"));
 306                 size = 1;
 307         }
 308
 309         allocation = acpi_os_allocate(size);
 310         if (!allocation) {
 311
 312                 /* Report allocation error */
 313
 314                 ACPI_ERROR((module, line,
 315                             "ut_allocate: Could not allocate size %X",
 316                             (u32) size));
 317
 318                 return_PTR(NULL);
 319         }
 320
 321         return_PTR(allocation);
 322 }
 323
 324 /*******************************************************************************
 325  *
 326  * FUNCTION:    acpi_ut_callocate
 327  *
 328  * PARAMETERS:  Size                - Size of the allocation
 329  *              Component           - Component type of caller
 330  *              Module              - Source file name of caller
 331  *              Line                - Line number of caller
 332  *
 333  * RETURN:      Address of the allocated memory on success, NULL on failure.
 334  *
 335  * DESCRIPTION: Subsystem equivalent of calloc.
 336  *
 337  ******************************************************************************/
 338
 339 void *acpi_ut_callocate(acpi_size size, u32 component, char *module, u32 line)
 340 {
 341         void *allocation;
 342
 343         ACPI_FUNCTION_TRACE_U32("ut_callocate", size);
 344
 345         /* Check for an inadvertent size of zero bytes */
 346
 347         if (!size) {
 348                 ACPI_ERROR((module, line,
 349                             "Attempt to allocate zero bytes, allocating 1 byte"));
 350                 size = 1;
 351         }
 352
 353         allocation = acpi_os_allocate(size);
 354         if (!allocation) {
 355
 356                 /* Report allocation error */
 357
 358                 ACPI_ERROR((module, line,
 359                             "Could not allocate size %X", (u32) size));
 360                 return_PTR(NULL);
 361         }
 362
 363         /* Clear the memory block */
 364
 365         ACPI_MEMSET(allocation, 0, size);
 366         return_PTR(allocation);
 367 }
 368
 369 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 370 /*
 371  * These procedures are used for tracking memory leaks in the subsystem, and
 372  * they get compiled out when the ACPI_DBG_TRACK_ALLOCATIONS is not set.
 373  *
 374  * Each memory allocation is tracked via a doubly linked list.  Each
 375  * element contains the caller's component, module name, function name, and
 376  * line number.  acpi_ut_allocate and acpi_ut_callocate call
 377  * acpi_ut_track_allocation to add an element to the list; deletion
 378  * occurs in the body of acpi_ut_free.
 379  */
 380
 381 /*******************************************************************************
 382  *
 383  * FUNCTION:    acpi_ut_create_list
 384  *
 385  * PARAMETERS:  cache_name      - Ascii name for the cache
 386  *              object_size     - Size of each cached object
 387  *              return_cache    - Where the new cache object is returned
 388  *
 389  * RETURN:      Status
 390  *
 391  * DESCRIPTION: Create a local memory list for tracking purposed
 392  *
 393  ******************************************************************************/
 394
 395 static acpi_status
 396 acpi_ut_create_list(char *list_name,
 397                     u16 object_size, struct acpi_memory_list **return_cache)
 398 {
 399         struct acpi_memory_list *cache;
 400
 401         cache = acpi_os_allocate(sizeof(struct acpi_memory_list));
 402         if (!cache) {
 403                 return (AE_NO_MEMORY);
 404         }
 405
 406         ACPI_MEMSET(cache, 0, sizeof(struct acpi_memory_list));
 407
 408         cache->list_name = list_name;
 409         cache->object_size = object_size;
 410
 411         *return_cache = cache;
 412         return (AE_OK);
 413 }
 414
 415 /*******************************************************************************
 416  *
 417  * FUNCTION:    acpi_ut_allocate_and_track
 418  *
 419  * PARAMETERS:  Size                - Size of the allocation
 420  *              Component           - Component type of caller
 421  *              Module              - Source file name of caller
 422  *              Line                - Line number of caller
 423  *
 424  * RETURN:      Address of the allocated memory on success, NULL on failure.
 425  *
 426  * DESCRIPTION: The subsystem's equivalent of malloc.
 427  *
 428  ******************************************************************************/
 429
 430 void *acpi_ut_allocate_and_track(acpi_size size,
 431                                  u32 component, char *module, u32 line)
 432 {
 433         struct acpi_debug_mem_block *allocation;
 434         acpi_status status;
 435
 436         allocation =
 437             acpi_ut_allocate(size + sizeof(struct acpi_debug_mem_header),
 438                              component, module, line);
 439         if (!allocation) {
 440                 return (NULL);
 441         }
 442
 443         status = acpi_ut_track_allocation(allocation, size,
 444                                           ACPI_MEM_MALLOC, component, module,
 445                                           line);
 446         if (ACPI_FAILURE(status)) {
 447                 acpi_os_free(allocation);
 448                 return (NULL);
 449         }
 450
 451         acpi_gbl_global_list->total_allocated++;
 452         acpi_gbl_global_list->current_total_size += (u32) size;
 453
 454         return ((void *)&allocation->user_space);
 455 }
 456
 457 /*******************************************************************************
 458  *
 459  * FUNCTION:    acpi_ut_callocate_and_track
 460  *
 461  * PARAMETERS:  Size                - Size of the allocation
 462  *              Component           - Component type of caller
 463  *              Module              - Source file name of caller
 464  *              Line                - Line number of caller
 465  *
 466  * RETURN:      Address of the allocated memory on success, NULL on failure.
 467  *
 468  * DESCRIPTION: Subsystem equivalent of calloc.
 469  *
 470  ******************************************************************************/
 471
 472 void *acpi_ut_callocate_and_track(acpi_size size,
 473                                   u32 component, char *module, u32 line)
 474 {
 475         struct acpi_debug_mem_block *allocation;
 476         acpi_status status;
 477
 478         allocation =
 479             acpi_ut_callocate(size + sizeof(struct acpi_debug_mem_header),
 480                               component, module, line);
 481         if (!allocation) {
 482
 483                 /* Report allocation error */
 484
 485                 ACPI_ERROR((module, line,
 486                             "Could not allocate size %X", (u32) size));
 487                 return (NULL);
 488         }
 489
 490         status = acpi_ut_track_allocation(allocation, size,
 491                                           ACPI_MEM_CALLOC, component, module,
 492                                           line);
 493         if (ACPI_FAILURE(status)) {
 494                 acpi_os_free(allocation);
 495                 return (NULL);
 496         }
 497
 498         acpi_gbl_global_list->total_allocated++;
 499         acpi_gbl_global_list->current_total_size += (u32) size;
 500
 501         return ((void *)&allocation->user_space);
 502 }
 503
 504 /*******************************************************************************
 505  *
 506  * FUNCTION:    acpi_ut_free_and_track
 507  *
 508  * PARAMETERS:  Allocation          - Address of the memory to deallocate
 509  *              Component           - Component type of caller
 510  *              Module              - Source file name of caller
 511  *              Line                - Line number of caller
 512  *
 513  * RETURN:      None
 514  *
 515  * DESCRIPTION: Frees the memory at Allocation
 516  *
 517  ******************************************************************************/
 518
 519 void
 520 acpi_ut_free_and_track(void *allocation, u32 component, char *module, u32 line)
 521 {
 522         struct acpi_debug_mem_block *debug_block;
 523         acpi_status status;
 524
 525         ACPI_FUNCTION_TRACE_PTR("ut_free", allocation);
 526
 527         if (NULL == allocation) {
 528                 ACPI_ERROR((module, line, "Attempt to delete a NULL address"));
 529
 530                 return_VOID;
 531         }
 532
 533         debug_block = ACPI_CAST_PTR(struct acpi_debug_mem_block,
 534                                     (((char *)allocation) -
 535                                      sizeof(struct acpi_debug_mem_header)));
 536
 537         acpi_gbl_global_list->total_freed++;
 538         acpi_gbl_global_list->current_total_size -= debug_block->size;
 539
 540         status = acpi_ut_remove_allocation(debug_block,
 541                                            component, module, line);
 542         if (ACPI_FAILURE(status)) {
 543                 ACPI_EXCEPTION((AE_INFO, status, "Could not free memory"));
 544         }
 545
 546         acpi_os_free(debug_block);
 547         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p freed\n", allocation));
 548         return_VOID;
 549 }
 550
 551 /*******************************************************************************
 552  *
 553  * FUNCTION:    acpi_ut_find_allocation
 554  *
 555  * PARAMETERS:  Allocation              - Address of allocated memory
 556  *
 557  * RETURN:      A list element if found; NULL otherwise.
 558  *
 559  * DESCRIPTION: Searches for an element in the global allocation tracking list.
 560  *
 561  ******************************************************************************/
 562
 563 static struct acpi_debug_mem_block *acpi_ut_find_allocation(void *allocation)
 564 {
 565         struct acpi_debug_mem_block *element;
 566
 567         ACPI_FUNCTION_ENTRY();
 568
 569         element = acpi_gbl_global_list->list_head;
 570
 571         /* Search for the address. */
 572
 573         while (element) {
 574                 if (element == allocation) {
 575                         return (element);
 576                 }
 577
 578                 element = element->next;
 579         }
 580
 581         return (NULL);
 582 }
 583
 584 /*******************************************************************************
 585  *
 586  * FUNCTION:    acpi_ut_track_allocation
 587  *
 588  * PARAMETERS:  Allocation          - Address of allocated memory
 589  *              Size                - Size of the allocation
 590  *              alloc_type          - MEM_MALLOC or MEM_CALLOC
 591  *              Component           - Component type of caller
 592  *              Module              - Source file name of caller
 593  *              Line                - Line number of caller
 594  *
 595  * RETURN:      None.
 596  *
 597  * DESCRIPTION: Inserts an element into the global allocation tracking list.
 598  *
 599  ******************************************************************************/
 600
 601 static acpi_status
 602 acpi_ut_track_allocation(struct acpi_debug_mem_block *allocation,
 603                          acpi_size size,
 604                          u8 alloc_type, u32 component, char *module, u32 line)
 605 {
 606         struct acpi_memory_list *mem_list;
 607         struct acpi_debug_mem_block *element;
 608         acpi_status status = AE_OK;
 609
 610         ACPI_FUNCTION_TRACE_PTR("ut_track_allocation", allocation);
 611
 612         mem_list = acpi_gbl_global_list;
 613         status = acpi_ut_acquire_mutex(ACPI_MTX_MEMORY);
 614         if (ACPI_FAILURE(status)) {
 615                 return_ACPI_STATUS(status);
 616         }
 617
 618         /*
 619          * Search list for this address to make sure it is not already on the list.
 620          * This will catch several kinds of problems.
 621          */
 622         element = acpi_ut_find_allocation(allocation);
 623         if (element) {
 624                 ACPI_ERROR((AE_INFO,
 625                             "ut_track_allocation: Allocation already present in list! (%p)",
 626                             allocation));
 627
 628                 ACPI_ERROR((AE_INFO, "Element %p Address %p",
 629                             element, allocation));
 630
 631                 goto unlock_and_exit;
 632         }
 633
 634         /* Fill in the instance data. */
 635
 636         allocation->size = (u32) size;
 637         allocation->alloc_type = alloc_type;
 638         allocation->component = component;
 639         allocation->line = line;
 640
 641         ACPI_STRNCPY(allocation->module, module, ACPI_MAX_MODULE_NAME);
 642         allocation->module[ACPI_MAX_MODULE_NAME - 1] = 0;
 643
 644         /* Insert at list head */
 645
 646         if (mem_list->list_head) {
 647                 ((struct acpi_debug_mem_block *)(mem_list->list_head))->
 648                     previous = allocation;
 649         }
 650
 651         allocation->next = mem_list->list_head;
 652         allocation->previous = NULL;
 653
 654         mem_list->list_head = allocation;
 655
 656       unlock_and_exit:
 657         status = acpi_ut_release_mutex(ACPI_MTX_MEMORY);
 658         return_ACPI_STATUS(status);
 659 }
 660
 661 /*******************************************************************************
 662  *
 663  * FUNCTION:    acpi_ut_remove_allocation
 664  *
 665  * PARAMETERS:  Allocation          - Address of allocated memory
 666  *              Component           - Component type of caller
 667  *              Module              - Source file name of caller
 668  *              Line                - Line number of caller
 669  *
 670  * RETURN:
 671  *
 672  * DESCRIPTION: Deletes an element from the global allocation tracking list.
 673  *
 674  ******************************************************************************/
 675
 676 static acpi_status
 677 acpi_ut_remove_allocation(struct acpi_debug_mem_block *allocation,
 678                           u32 component, char *module, u32 line)
 679 {
 680         struct acpi_memory_list *mem_list;
 681         acpi_status status;
 682
 683         ACPI_FUNCTION_TRACE("ut_remove_allocation");
 684
 685         mem_list = acpi_gbl_global_list;
 686         if (NULL == mem_list->list_head) {
 687
 688                 /* No allocations! */
 689
 690                 ACPI_ERROR((module, line,
 691                             "Empty allocation list, nothing to free!"));
 692
 693                 return_ACPI_STATUS(AE_OK);
 694         }
 695
 696         status = acpi_ut_acquire_mutex(ACPI_MTX_MEMORY);
 697         if (ACPI_FAILURE(status)) {
 698                 return_ACPI_STATUS(status);
 699         }
 700
 701         /* Unlink */
 702
 703         if (allocation->previous) {
 704                 (allocation->previous)->next = allocation->next;
 705         } else {
 706                 mem_list->list_head = allocation->next;
 707         }
 708
 709         if (allocation->next) {
 710                 (allocation->next)->previous = allocation->previous;
 711         }
 712
 713         /* Mark the segment as deleted */
 714
 715         ACPI_MEMSET(&allocation->user_space, 0xEA, allocation->size);
 716
 717         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Freeing size 0%X\n",
 718                           allocation->size));
 719
 720         status = acpi_ut_release_mutex(ACPI_MTX_MEMORY);
 721         return_ACPI_STATUS(status);
 722 }
 723
 724 /*******************************************************************************
 725  *
 726  * FUNCTION:    acpi_ut_dump_allocation_info
 727  *
 728  * PARAMETERS:
 729  *
 730  * RETURN:      None
 731  *
 732  * DESCRIPTION: Print some info about the outstanding allocations.
 733  *
 734  ******************************************************************************/
 735
 736 #ifdef ACPI_FUTURE_USAGE
 737 void acpi_ut_dump_allocation_info(void)
 738 {
 739 /*
 740         struct acpi_memory_list         *mem_list;
 741 */
 742
 743         ACPI_FUNCTION_TRACE("ut_dump_allocation_info");
 744
 745 /*
 746         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 747                           ("%30s: %4d (%3d Kb)\n", "Current allocations",
 748                           mem_list->current_count,
 749                           ROUND_UP_TO_1K (mem_list->current_size)));
 750
 751         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 752                           ("%30s: %4d (%3d Kb)\n", "Max concurrent allocations",
 753                           mem_list->max_concurrent_count,
 754                           ROUND_UP_TO_1K (mem_list->max_concurrent_size)));
 755
 756         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 757                           ("%30s: %4d (%3d Kb)\n", "Total (all) internal objects",
 758                           running_object_count,
 759                           ROUND_UP_TO_1K (running_object_size)));
 760
 761         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 762                           ("%30s: %4d (%3d Kb)\n", "Total (all) allocations",
 763                           running_alloc_count,
 764                           ROUND_UP_TO_1K (running_alloc_size)));
 765
 766         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 767                           ("%30s: %4d (%3d Kb)\n", "Current Nodes",
 768                           acpi_gbl_current_node_count,
 769                           ROUND_UP_TO_1K (acpi_gbl_current_node_size)));
 770
 771         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 772                           ("%30s: %4d (%3d Kb)\n", "Max Nodes",
 773                           acpi_gbl_max_concurrent_node_count,
 774                           ROUND_UP_TO_1K ((acpi_gbl_max_concurrent_node_count *
 775                                          sizeof (struct acpi_namespace_node)))));
 776 */
 777         return_VOID;
 778 }
 779 #endif                          /*  ACPI_FUTURE_USAGE  */
 780
 781 /*******************************************************************************
 782  *
 783  * FUNCTION:    acpi_ut_dump_allocations
 784  *
 785  * PARAMETERS:  Component           - Component(s) to dump info for.
 786  *              Module              - Module to dump info for.  NULL means all.
 787  *
 788  * RETURN:      None
 789  *
 790  * DESCRIPTION: Print a list of all outstanding allocations.
 791  *
 792  ******************************************************************************/
 793
 794 void acpi_ut_dump_allocations(u32 component, char *module)
 795 {
 796         struct acpi_debug_mem_block *element;
 797         union acpi_descriptor *descriptor;
 798         u32 num_outstanding = 0;
 799
 800         ACPI_FUNCTION_TRACE("ut_dump_allocations");
 801
 802         /*
 803          * Walk the allocation list.
 804          */
 805         if (ACPI_FAILURE(acpi_ut_acquire_mutex(ACPI_MTX_MEMORY))) {
 806                 return;
 807         }
 808
 809         element = acpi_gbl_global_list->list_head;
 810         while (element) {
 811                 if ((element->component & component) &&
 812                     ((module == NULL)
 813                      || (0 == ACPI_STRCMP(module, element->module)))) {
 814
 815                         /* Ignore allocated objects that are in a cache */
 816
 817                         descriptor =
 818                             ACPI_CAST_PTR(union acpi_descriptor,
 819                                           &element->user_space);
 820                         if (descriptor->descriptor_id != ACPI_DESC_TYPE_CACHED) {
 821                                 acpi_os_printf("%p Len %04X %9.9s-%d [%s] ",
 822                                                descriptor, element->size,
 823                                                element->module, element->line,
 824                                                acpi_ut_get_descriptor_name
 825                                                (descriptor));
 826
 827                                 /* Most of the elements will be Operand objects. */
 828
 829                                 switch (ACPI_GET_DESCRIPTOR_TYPE(descriptor)) {
 830                                 case ACPI_DESC_TYPE_OPERAND:
 831                                         acpi_os_printf("%12.12s R%hd",
 832                                                        acpi_ut_get_type_name
 833                                                        (descriptor->object.
 834                                                         common.type),
 835                                                        descriptor->object.
 836                                                        common.reference_count);
 837                                         break;
 838
 839                                 case ACPI_DESC_TYPE_PARSER:
 840                                         acpi_os_printf("aml_opcode %04hX",
 841                                                        descriptor->op.asl.
 842                                                        aml_opcode);
 843                                         break;
 844
 845                                 case ACPI_DESC_TYPE_NAMED:
 846                                         acpi_os_printf("%4.4s",
 847                                                        acpi_ut_get_node_name
 848                                                        (&descriptor->node));
 849                                         break;
 850
 851                                 default:
 852                                         break;
 853                                 }
 854
 855                                 acpi_os_printf("\n");
 856                                 num_outstanding++;
 857                         }
 858                 }
 859                 element = element->next;
 860         }
 861
 862         (void)acpi_ut_release_mutex(ACPI_MTX_MEMORY);
 863
 864         /* Print summary */
 865
 866         if (!num_outstanding) {
 867                 ACPI_INFO((AE_INFO, "No outstanding allocations"));
 868         } else {
 869                 ACPI_ERROR((AE_INFO,
 870                             "%d(%X) Outstanding allocations",
 871                             num_outstanding, num_outstanding));
 872         }
 873
 874         return_VOID;
 875 }
 876
 877 #endif                          /* #ifdef ACPI_DBG_TRACK_ALLOCATIONS */