reactos/drivers/bus/acpi/acpica/events/evgpeutil.c

   1 /******************************************************************************
   2  *
   3  * Module Name: evgpeutil - GPE utilities
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2011, 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
 117 #include "acpi.h"
 118 #include "accommon.h"
 119 #include "acevents.h"
 120
 121 #define _COMPONENT          ACPI_EVENTS
 122         ACPI_MODULE_NAME    ("evgpeutil")
 123
 124
 125 /*******************************************************************************
 126  *
 127  * FUNCTION:    AcpiEvWalkGpeList
 128  *
 129  * PARAMETERS:  GpeWalkCallback     - Routine called for each GPE block
 130  *              Context             - Value passed to callback
 131  *
 132  * RETURN:      Status
 133  *
 134  * DESCRIPTION: Walk the GPE lists.
 135  *
 136  ******************************************************************************/
 137
 138 ACPI_STATUS
 139 AcpiEvWalkGpeList (
 140     ACPI_GPE_CALLBACK       GpeWalkCallback,
 141     void                    *Context)
 142 {
 143     ACPI_GPE_BLOCK_INFO     *GpeBlock;
 144     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo;
 145     ACPI_STATUS             Status = AE_OK;
 146     ACPI_CPU_FLAGS          Flags;
 147
 148
 149     ACPI_FUNCTION_TRACE (EvWalkGpeList);
 150
 151
 152     Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 153
 154     /* Walk the interrupt level descriptor list */
 155
 156     GpeXruptInfo = AcpiGbl_GpeXruptListHead;
 157     while (GpeXruptInfo)
 158     {
 159         /* Walk all Gpe Blocks attached to this interrupt level */
 160
 161         GpeBlock = GpeXruptInfo->GpeBlockListHead;
 162         while (GpeBlock)
 163         {
 164             /* One callback per GPE block */
 165
 166             Status = GpeWalkCallback (GpeXruptInfo, GpeBlock, Context);
 167             if (ACPI_FAILURE (Status))
 168             {
 169                 if (Status == AE_CTRL_END) /* Callback abort */
 170                 {
 171                     Status = AE_OK;
 172                 }
 173                 goto UnlockAndExit;
 174             }
 175
 176             GpeBlock = GpeBlock->Next;
 177         }
 178
 179         GpeXruptInfo = GpeXruptInfo->Next;
 180     }
 181
 182 UnlockAndExit:
 183     AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
 184     return_ACPI_STATUS (Status);
 185 }
 186
 187
 188 /*******************************************************************************
 189  *
 190  * FUNCTION:    AcpiEvValidGpeEvent
 191  *
 192  * PARAMETERS:  GpeEventInfo                - Info for this GPE
 193  *
 194  * RETURN:      TRUE if the GpeEvent is valid
 195  *
 196  * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
 197  *              Should be called only when the GPE lists are semaphore locked
 198  *              and not subject to change.
 199  *
 200  ******************************************************************************/
 201
 202 BOOLEAN
 203 AcpiEvValidGpeEvent (
 204     ACPI_GPE_EVENT_INFO     *GpeEventInfo)
 205 {
 206     ACPI_GPE_XRUPT_INFO     *GpeXruptBlock;
 207     ACPI_GPE_BLOCK_INFO     *GpeBlock;
 208
 209
 210     ACPI_FUNCTION_ENTRY ();
 211
 212
 213     /* No need for spin lock since we are not changing any list elements */
 214
 215     /* Walk the GPE interrupt levels */
 216
 217     GpeXruptBlock = AcpiGbl_GpeXruptListHead;
 218     while (GpeXruptBlock)
 219     {
 220         GpeBlock = GpeXruptBlock->GpeBlockListHead;
 221
 222         /* Walk the GPE blocks on this interrupt level */
 223
 224         while (GpeBlock)
 225         {
 226             if ((&GpeBlock->EventInfo[0] <= GpeEventInfo) &&
 227                 (&GpeBlock->EventInfo[GpeBlock->GpeCount] > GpeEventInfo))
 228             {
 229                 return (TRUE);
 230             }
 231
 232             GpeBlock = GpeBlock->Next;
 233         }
 234
 235         GpeXruptBlock = GpeXruptBlock->Next;
 236     }
 237
 238     return (FALSE);
 239 }
 240
 241
 242 /*******************************************************************************
 243  *
 244  * FUNCTION:    AcpiEvGetGpeDevice
 245  *
 246  * PARAMETERS:  GPE_WALK_CALLBACK
 247  *
 248  * RETURN:      Status
 249  *
 250  * DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE
 251  *              block device. NULL if the GPE is one of the FADT-defined GPEs.
 252  *
 253  ******************************************************************************/
 254
 255 ACPI_STATUS
 256 AcpiEvGetGpeDevice (
 257     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 258     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 259     void                    *Context)
 260 {
 261     ACPI_GPE_DEVICE_INFO    *Info = Context;
 262
 263
 264     /* Increment Index by the number of GPEs in this block */
 265
 266     Info->NextBlockBaseIndex += GpeBlock->GpeCount;
 267
 268     if (Info->Index < Info->NextBlockBaseIndex)
 269     {
 270         /*
 271          * The GPE index is within this block, get the node. Leave the node
 272          * NULL for the FADT-defined GPEs
 273          */
 274         if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE)
 275         {
 276             Info->GpeDevice = GpeBlock->Node;
 277         }
 278
 279         Info->Status = AE_OK;
 280         return (AE_CTRL_END);
 281     }
 282
 283     return (AE_OK);
 284 }
 285
 286
 287 /*******************************************************************************
 288  *
 289  * FUNCTION:    AcpiEvGetGpeXruptBlock
 290  *
 291  * PARAMETERS:  InterruptNumber      - Interrupt for a GPE block
 292  *
 293  * RETURN:      A GPE interrupt block
 294  *
 295  * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
 296  *              block per unique interrupt level used for GPEs. Should be
 297  *              called only when the GPE lists are semaphore locked and not
 298  *              subject to change.
 299  *
 300  ******************************************************************************/
 301
 302 ACPI_GPE_XRUPT_INFO *
 303 AcpiEvGetGpeXruptBlock (
 304     UINT32                  InterruptNumber)
 305 {
 306     ACPI_GPE_XRUPT_INFO     *NextGpeXrupt;
 307     ACPI_GPE_XRUPT_INFO     *GpeXrupt;
 308     ACPI_STATUS             Status;
 309     ACPI_CPU_FLAGS          Flags;
 310
 311
 312     ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock);
 313
 314
 315     /* No need for lock since we are not changing any list elements here */
 316
 317     NextGpeXrupt = AcpiGbl_GpeXruptListHead;
 318     while (NextGpeXrupt)
 319     {
 320         if (NextGpeXrupt->InterruptNumber == InterruptNumber)
 321         {
 322             return_PTR (NextGpeXrupt);
 323         }
 324
 325         NextGpeXrupt = NextGpeXrupt->Next;
 326     }
 327
 328     /* Not found, must allocate a new xrupt descriptor */
 329
 330     GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO));
 331     if (!GpeXrupt)
 332     {
 333         return_PTR (NULL);
 334     }
 335
 336     GpeXrupt->InterruptNumber = InterruptNumber;
 337
 338     /* Install new interrupt descriptor with spin lock */
 339
 340     Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 341     if (AcpiGbl_GpeXruptListHead)
 342     {
 343         NextGpeXrupt = AcpiGbl_GpeXruptListHead;
 344         while (NextGpeXrupt->Next)
 345         {
 346             NextGpeXrupt = NextGpeXrupt->Next;
 347         }
 348
 349         NextGpeXrupt->Next = GpeXrupt;
 350         GpeXrupt->Previous = NextGpeXrupt;
 351     }
 352     else
 353     {
 354         AcpiGbl_GpeXruptListHead = GpeXrupt;
 355     }
 356     AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
 357
 358     /* Install new interrupt handler if not SCI_INT */
 359
 360     if (InterruptNumber != AcpiGbl_FADT.SciInterrupt)
 361     {
 362         Status = AcpiOsInstallInterruptHandler (InterruptNumber,
 363                     AcpiEvGpeXruptHandler, GpeXrupt);
 364         if (ACPI_FAILURE (Status))
 365         {
 366             ACPI_ERROR ((AE_INFO,
 367                 "Could not install GPE interrupt handler at level 0x%X",
 368                 InterruptNumber));
 369             return_PTR (NULL);
 370         }
 371     }
 372
 373     return_PTR (GpeXrupt);
 374 }
 375
 376
 377 /*******************************************************************************
 378  *
 379  * FUNCTION:    AcpiEvDeleteGpeXrupt
 380  *
 381  * PARAMETERS:  GpeXrupt        - A GPE interrupt info block
 382  *
 383  * RETURN:      Status
 384  *
 385  * DESCRIPTION: Remove and free a GpeXrupt block. Remove an associated
 386  *              interrupt handler if not the SCI interrupt.
 387  *
 388  ******************************************************************************/
 389
 390 ACPI_STATUS
 391 AcpiEvDeleteGpeXrupt (
 392     ACPI_GPE_XRUPT_INFO     *GpeXrupt)
 393 {
 394     ACPI_STATUS             Status;
 395     ACPI_CPU_FLAGS          Flags;
 396
 397
 398     ACPI_FUNCTION_TRACE (EvDeleteGpeXrupt);
 399
 400
 401     /* We never want to remove the SCI interrupt handler */
 402
 403     if (GpeXrupt->InterruptNumber == AcpiGbl_FADT.SciInterrupt)
 404     {
 405         GpeXrupt->GpeBlockListHead = NULL;
 406         return_ACPI_STATUS (AE_OK);
 407     }
 408
 409     /* Disable this interrupt */
 410
 411     Status = AcpiOsRemoveInterruptHandler (
 412                 GpeXrupt->InterruptNumber, AcpiEvGpeXruptHandler);
 413     if (ACPI_FAILURE (Status))
 414     {
 415         return_ACPI_STATUS (Status);
 416     }
 417
 418     /* Unlink the interrupt block with lock */
 419
 420     Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 421     if (GpeXrupt->Previous)
 422     {
 423         GpeXrupt->Previous->Next = GpeXrupt->Next;
 424     }
 425     else
 426     {
 427         /* No previous, update list head */
 428
 429         AcpiGbl_GpeXruptListHead = GpeXrupt->Next;
 430     }
 431
 432     if (GpeXrupt->Next)
 433     {
 434         GpeXrupt->Next->Previous = GpeXrupt->Previous;
 435     }
 436     AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
 437
 438     /* Free the block */
 439
 440     ACPI_FREE (GpeXrupt);
 441     return_ACPI_STATUS (AE_OK);
 442 }
 443
 444
 445 /*******************************************************************************
 446  *
 447  * FUNCTION:    AcpiEvDeleteGpeHandlers
 448  *
 449  * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
 450  *              GpeBlock            - Gpe Block info
 451  *
 452  * RETURN:      Status
 453  *
 454  * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
 455  *              Used only prior to termination.
 456  *
 457  ******************************************************************************/
 458
 459 ACPI_STATUS
 460 AcpiEvDeleteGpeHandlers (
 461     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 462     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 463     void                    *Context)
 464 {
 465     ACPI_GPE_EVENT_INFO     *GpeEventInfo;
 466     UINT32                  i;
 467     UINT32                  j;
 468
 469
 470     ACPI_FUNCTION_TRACE (EvDeleteGpeHandlers);
 471
 472
 473     /* Examine each GPE Register within the block */
 474
 475     for (i = 0; i < GpeBlock->RegisterCount; i++)
 476     {
 477         /* Now look at the individual GPEs in this byte register */
 478
 479         for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
 480         {
 481             GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
 482                 ACPI_GPE_REGISTER_WIDTH) + j];
 483
 484             if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
 485                     ACPI_GPE_DISPATCH_HANDLER)
 486             {
 487                 ACPI_FREE (GpeEventInfo->Dispatch.Handler);
 488                 GpeEventInfo->Dispatch.Handler = NULL;
 489                 GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK;
 490             }
 491         }
 492     }
 493
 494     return_ACPI_STATUS (AE_OK);
 495 }
 496