drivers/acpi/utilities/utalloc.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utalloc - local memory allocation routines
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  16  * 2.1. This is your license from Intel Corp. under its intellectual property
  17  * rights.  You may have additional license terms from the party that provided
  18  * you this software, covering your right to use that party's intellectual
  19  * property rights.
  20  *
  21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  22  * copy of the source code appearing in this file ("Covered Code") an
  23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  24  * base code distributed originally by Intel ("Original Intel Code") to copy,
  25  * make derivatives, distribute, use and display any portion of the Covered
  26  * Code in any form, with the right to sublicense such rights; and
  27  *
  28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  29  * license (with the right to sublicense), under only those claims of Intel
  30  * patents that are infringed by the Original Intel Code, to make, use, sell,
  31  * offer to sell, and import the Covered Code and derivative works thereof
  32  * solely to the minimum extent necessary to exercise the above copyright
  33  * license, and in no event shall the patent license extend to any additions
  34  * to or modifications of the Original Intel Code.  No other license or right
  35  * is granted directly or by implication, estoppel or otherwise;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  43  * Redistribution of source code of any substantial portion of the Covered
  44  * Code or modification with rights to further distribute source must include
  45  * the above Copyright Notice, the above License, this list of Conditions,
  46  * and the following Disclaimer and Export Compliance provision.  In addition,
  47  * Licensee must cause all Covered Code to which Licensee contributes to
  48  * contain a file documenting the changes Licensee made to create that Covered
  49  * Code and the date of any change.  Licensee must include in that file the
  50  * documentation of any changes made by any predecessor Licensee.  Licensee
  51  * must include a prominent statement that the modification is derived,
  52  * directly or indirectly, from Original Intel Code.
  53  *
  54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  55  * Redistribution of source code of any substantial portion of the Covered
  56  * Code or modification without rights to further distribute source must
  57  * include the following Disclaimer and Export Compliance provision in the
  58  * documentation and/or other materials provided with distribution.  In
  59  * addition, Licensee may not authorize further sublicense of source of any
  60  * portion of the Covered Code, and must include terms to the effect that the
  61  * license from Licensee to its licensee is limited to the intellectual
  62  * property embodied in the software Licensee provides to its licensee, and
  63  * not to intellectual property embodied in modifications its licensee may
  64  * make.
  65  *
  66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  67  * substantial portion of the Covered Code or modification must reproduce the
  68  * above Copyright Notice, and the following Disclaimer and Export Compliance
  69  * provision in the documentation and/or other materials provided with the
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  76  * Intel shall be used in advertising or otherwise to promote the sale, use or
  77  * other dealings in products derived from or relating to the Covered Code
  78  * without prior written authorization from Intel.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  83  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  85  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  86  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  87  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  88  * PARTICULAR PURPOSE.
  89  *
  90  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  91  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  92  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  93  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  94  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  95  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  96  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  97  * LIMITED REMEDY.
  98  *
  99  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 100  * software or system incorporating such software without first obtaining any
 101  * required license or other approval from the U. S. Department of Commerce or
 102  * any other agency or department of the United States Government.  In the
 103  * event Licensee exports any such software from the United States or
 104  * re-exports any such software from a foreign destination, Licensee shall
 105  * ensure that the distribution and export/re-export of the software is in
 106  * compliance with all laws, regulations, orders, or other restrictions of the
 107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 108  * any of its subsidiaries will export/re-export any technical data, process,
 109  * software, or service, directly or indirectly, to any country for which the
 110  * United States government or any agency thereof requires an export license,
 111  * other governmental approval, or letter of assurance, without first obtaining
 112  * such license, approval or letter.
 113  *
 114  *****************************************************************************/
 115
 116 #define __UTALLOC_C__
 117
 118 #include "acpi.h"
 119 #include "accommon.h"
 120 #include "acdebug.h"
 121
 122 #define _COMPONENT          ACPI_UTILITIES
 123         ACPI_MODULE_NAME    ("utalloc")
 124
 125
 126 /*******************************************************************************
 127  *
 128  * FUNCTION:    AcpiUtCreateCaches
 129  *
 130  * PARAMETERS:  None
 131  *
 132  * RETURN:      Status
 133  *
 134  * DESCRIPTION: Create all local caches
 135  *
 136  ******************************************************************************/
 137
 138 ACPI_STATUS
 139 AcpiUtCreateCaches (
 140     void)
 141 {
 142     ACPI_STATUS             Status;
 143
 144
 145     /* Object Caches, for frequently used objects */
 146
 147     Status = AcpiOsCreateCache ("Acpi-Namespace", sizeof (ACPI_NAMESPACE_NODE),
 148                 ACPI_MAX_NAMESPACE_CACHE_DEPTH, &AcpiGbl_NamespaceCache);
 149     if (ACPI_FAILURE (Status))
 150     {
 151         return (Status);
 152     }
 153
 154     Status = AcpiOsCreateCache ("Acpi-State", sizeof (ACPI_GENERIC_STATE),
 155                 ACPI_MAX_STATE_CACHE_DEPTH, &AcpiGbl_StateCache);
 156     if (ACPI_FAILURE (Status))
 157     {
 158         return (Status);
 159     }
 160
 161     Status = AcpiOsCreateCache ("Acpi-Parse", sizeof (ACPI_PARSE_OBJ_COMMON),
 162                 ACPI_MAX_PARSE_CACHE_DEPTH, &AcpiGbl_PsNodeCache);
 163     if (ACPI_FAILURE (Status))
 164     {
 165         return (Status);
 166     }
 167
 168     Status = AcpiOsCreateCache ("Acpi-ParseExt", sizeof (ACPI_PARSE_OBJ_NAMED),
 169                 ACPI_MAX_EXTPARSE_CACHE_DEPTH, &AcpiGbl_PsNodeExtCache);
 170     if (ACPI_FAILURE (Status))
 171     {
 172         return (Status);
 173     }
 174
 175     Status = AcpiOsCreateCache ("Acpi-Operand", sizeof (ACPI_OPERAND_OBJECT),
 176                 ACPI_MAX_OBJECT_CACHE_DEPTH, &AcpiGbl_OperandCache);
 177     if (ACPI_FAILURE (Status))
 178     {
 179         return (Status);
 180     }
 181
 182
 183 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 184
 185     /* Memory allocation lists */
 186
 187     Status = AcpiUtCreateList ("Acpi-Global", 0,
 188                 &AcpiGbl_GlobalList);
 189     if (ACPI_FAILURE (Status))
 190     {
 191         return (Status);
 192     }
 193
 194     Status = AcpiUtCreateList ("Acpi-Namespace", sizeof (ACPI_NAMESPACE_NODE),
 195                 &AcpiGbl_NsNodeList);
 196     if (ACPI_FAILURE (Status))
 197     {
 198         return (Status);
 199     }
 200 #endif
 201
 202     return (AE_OK);
 203 }
 204
 205
 206 /*******************************************************************************
 207  *
 208  * FUNCTION:    AcpiUtDeleteCaches
 209  *
 210  * PARAMETERS:  None
 211  *
 212  * RETURN:      Status
 213  *
 214  * DESCRIPTION: Purge and delete all local caches
 215  *
 216  ******************************************************************************/
 217
 218 ACPI_STATUS
 219 AcpiUtDeleteCaches (
 220     void)
 221 {
 222 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 223     char                    Buffer[7];
 224
 225     if (AcpiGbl_DisplayFinalMemStats)
 226     {
 227         ACPI_STRCPY (Buffer, "MEMORY");
 228         (void) AcpiDbDisplayStatistics (Buffer);
 229     }
 230 #endif
 231
 232     (void) AcpiOsDeleteCache (AcpiGbl_NamespaceCache);
 233     AcpiGbl_NamespaceCache = NULL;
 234
 235     (void) AcpiOsDeleteCache (AcpiGbl_StateCache);
 236     AcpiGbl_StateCache = NULL;
 237
 238     (void) AcpiOsDeleteCache (AcpiGbl_OperandCache);
 239     AcpiGbl_OperandCache = NULL;
 240
 241     (void) AcpiOsDeleteCache (AcpiGbl_PsNodeCache);
 242     AcpiGbl_PsNodeCache = NULL;
 243
 244     (void) AcpiOsDeleteCache (AcpiGbl_PsNodeExtCache);
 245     AcpiGbl_PsNodeExtCache = NULL;
 246
 247
 248 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 249
 250     /* Debug only - display leftover memory allocation, if any */
 251
 252     AcpiUtDumpAllocations (ACPI_UINT32_MAX, NULL);
 253
 254     /* Free memory lists */
 255
 256     AcpiOsFree (AcpiGbl_GlobalList);
 257     AcpiGbl_GlobalList = NULL;
 258
 259     AcpiOsFree (AcpiGbl_NsNodeList);
 260     AcpiGbl_NsNodeList = NULL;
 261 #endif
 262
 263     return (AE_OK);
 264 }
 265
 266
 267 /*******************************************************************************
 268  *
 269  * FUNCTION:    AcpiUtValidateBuffer
 270  *
 271  * PARAMETERS:  Buffer              - Buffer descriptor to be validated
 272  *
 273  * RETURN:      Status
 274  *
 275  * DESCRIPTION: Perform parameter validation checks on an ACPI_BUFFER
 276  *
 277  ******************************************************************************/
 278
 279 ACPI_STATUS
 280 AcpiUtValidateBuffer (
 281     ACPI_BUFFER             *Buffer)
 282 {
 283
 284     /* Obviously, the structure pointer must be valid */
 285
 286     if (!Buffer)
 287     {
 288         return (AE_BAD_PARAMETER);
 289     }
 290
 291     /* Special semantics for the length */
 292
 293     if ((Buffer->Length == ACPI_NO_BUFFER)              ||
 294         (Buffer->Length == ACPI_ALLOCATE_BUFFER)        ||
 295         (Buffer->Length == ACPI_ALLOCATE_LOCAL_BUFFER))
 296     {
 297         return (AE_OK);
 298     }
 299
 300     /* Length is valid, the buffer pointer must be also */
 301
 302     if (!Buffer->Pointer)
 303     {
 304         return (AE_BAD_PARAMETER);
 305     }
 306
 307     return (AE_OK);
 308 }
 309
 310
 311 /*******************************************************************************
 312  *
 313  * FUNCTION:    AcpiUtInitializeBuffer
 314  *
 315  * PARAMETERS:  Buffer              - Buffer to be validated
 316  *              RequiredLength      - Length needed
 317  *
 318  * RETURN:      Status
 319  *
 320  * DESCRIPTION: Validate that the buffer is of the required length or
 321  *              allocate a new buffer. Returned buffer is always zeroed.
 322  *
 323  ******************************************************************************/
 324
 325 ACPI_STATUS
 326 AcpiUtInitializeBuffer (
 327     ACPI_BUFFER             *Buffer,
 328     ACPI_SIZE               RequiredLength)
 329 {
 330     ACPI_SIZE               InputBufferLength;
 331
 332
 333     /* Parameter validation */
 334
 335     if (!Buffer || !RequiredLength)
 336     {
 337         return (AE_BAD_PARAMETER);
 338     }
 339
 340     /*
 341      * Buffer->Length is used as both an input and output parameter. Get the
 342      * input actual length and set the output required buffer length.
 343      */
 344     InputBufferLength = Buffer->Length;
 345     Buffer->Length = RequiredLength;
 346
 347     /*
 348      * The input buffer length contains the actual buffer length, or the type
 349      * of buffer to be allocated by this routine.
 350      */
 351     switch (InputBufferLength)
 352     {
 353     case ACPI_NO_BUFFER:
 354
 355         /* Return the exception (and the required buffer length) */
 356
 357         return (AE_BUFFER_OVERFLOW);
 358
 359     case ACPI_ALLOCATE_BUFFER:
 360
 361         /* Allocate a new buffer */
 362
 363         Buffer->Pointer = AcpiOsAllocate (RequiredLength);
 364         break;
 365
 366     case ACPI_ALLOCATE_LOCAL_BUFFER:
 367
 368         /* Allocate a new buffer with local interface to allow tracking */
 369
 370         Buffer->Pointer = ACPI_ALLOCATE (RequiredLength);
 371         break;
 372
 373     default:
 374
 375         /* Existing buffer: Validate the size of the buffer */
 376
 377         if (InputBufferLength < RequiredLength)
 378         {
 379             return (AE_BUFFER_OVERFLOW);
 380         }
 381         break;
 382     }
 383
 384     /* Validate allocation from above or input buffer pointer */
 385
 386     if (!Buffer->Pointer)
 387     {
 388         return (AE_NO_MEMORY);
 389     }
 390
 391     /* Have a valid buffer, clear it */
 392
 393     ACPI_MEMSET (Buffer->Pointer, 0, RequiredLength);
 394     return (AE_OK);
 395 }
 396
 397
 398 /*******************************************************************************
 399  *
 400  * FUNCTION:    AcpiUtAllocate
 401  *
 402  * PARAMETERS:  Size                - Size of the allocation
 403  *              Component           - Component type of caller
 404  *              Module              - Source file name of caller
 405  *              Line                - Line number of caller
 406  *
 407  * RETURN:      Address of the allocated memory on success, NULL on failure.
 408  *
 409  * DESCRIPTION: Subsystem equivalent of malloc.
 410  *
 411  ******************************************************************************/
 412
 413 void *
 414 AcpiUtAllocate (
 415     ACPI_SIZE               Size,
 416     UINT32                  Component,
 417     const char              *Module,
 418     UINT32                  Line)
 419 {
 420     void                    *Allocation;
 421
 422
 423     ACPI_FUNCTION_TRACE_U32 (UtAllocate, Size);
 424
 425
 426     /* Check for an inadvertent size of zero bytes */
 427
 428     if (!Size)
 429     {
 430         ACPI_WARNING ((Module, Line,
 431             "Attempt to allocate zero bytes, allocating 1 byte"));
 432         Size = 1;
 433     }
 434
 435     Allocation = AcpiOsAllocate (Size);
 436     if (!Allocation)
 437     {
 438         /* Report allocation error */
 439
 440         ACPI_WARNING ((Module, Line,
 441             "Could not allocate size %u", (UINT32) Size));
 442
 443         return_PTR (NULL);
 444     }
 445
 446     return_PTR (Allocation);
 447 }
 448
 449
 450 /*******************************************************************************
 451  *
 452  * FUNCTION:    AcpiUtAllocateZeroed
 453  *
 454  * PARAMETERS:  Size                - Size of the allocation
 455  *              Component           - Component type of caller
 456  *              Module              - Source file name of caller
 457  *              Line                - Line number of caller
 458  *
 459  * RETURN:      Address of the allocated memory on success, NULL on failure.
 460  *
 461  * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
 462  *
 463  ******************************************************************************/
 464
 465 void *
 466 AcpiUtAllocateZeroed (
 467     ACPI_SIZE               Size,
 468     UINT32                  Component,
 469     const char              *Module,
 470     UINT32                  Line)
 471 {
 472     void                    *Allocation;
 473
 474
 475     ACPI_FUNCTION_ENTRY ();
 476
 477
 478     Allocation = AcpiUtAllocate (Size, Component, Module, Line);
 479     if (Allocation)
 480     {
 481         /* Clear the memory block */
 482
 483         ACPI_MEMSET (Allocation, 0, Size);
 484     }
 485
 486     return (Allocation);
 487 }
 488