reactos/drivers/bus/acpi/acpica/namespace/nsobject.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: nsobject - Utilities for objects attached to namespace
   4  *                         table entries
   5  *
   6  ******************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89  * PARTICULAR PURPOSE.
  90  *
  91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98  * LIMITED REMEDY.
  99  *
 100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 101  * software or system incorporating such software without first obtaining any
 102  * required license or other approval from the U. S. Department of Commerce or
 103  * any other agency or department of the United States Government.  In the
 104  * event Licensee exports any such software from the United States or
 105  * re-exports any such software from a foreign destination, Licensee shall
 106  * ensure that the distribution and export/re-export of the software is in
 107  * compliance with all laws, regulations, orders, or other restrictions of the
 108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 109  * any of its subsidiaries will export/re-export any technical data, process,
 110  * software, or service, directly or indirectly, to any country for which the
 111  * United States government or any agency thereof requires an export license,
 112  * other governmental approval, or letter of assurance, without first obtaining
 113  * such license, approval or letter.
 114  *
 115  *****************************************************************************/
 116
 117
 118 #define __NSOBJECT_C__
 119
 120 #include "acpi.h"
 121 #include "accommon.h"
 122 #include "acnamesp.h"
 123
 124
 125 #define _COMPONENT          ACPI_NAMESPACE
 126         ACPI_MODULE_NAME    ("nsobject")
 127
 128
 129 /*******************************************************************************
 130  *
 131  * FUNCTION:    AcpiNsAttachObject
 132  *
 133  * PARAMETERS:  Node                - Parent Node
 134  *              Object              - Object to be attached
 135  *              Type                - Type of object, or ACPI_TYPE_ANY if not
 136  *                                    known
 137  *
 138  * RETURN:      Status
 139  *
 140  * DESCRIPTION: Record the given object as the value associated with the
 141  *              name whose ACPI_HANDLE is passed.  If Object is NULL
 142  *              and Type is ACPI_TYPE_ANY, set the name as having no value.
 143  *              Note: Future may require that the Node->Flags field be passed
 144  *              as a parameter.
 145  *
 146  * MUTEX:       Assumes namespace is locked
 147  *
 148  ******************************************************************************/
 149
 150 ACPI_STATUS
 151 AcpiNsAttachObject (
 152     ACPI_NAMESPACE_NODE     *Node,
 153     ACPI_OPERAND_OBJECT     *Object,
 154     ACPI_OBJECT_TYPE        Type)
 155 {
 156     ACPI_OPERAND_OBJECT     *ObjDesc;
 157     ACPI_OPERAND_OBJECT     *LastObjDesc;
 158     ACPI_OBJECT_TYPE        ObjectType = ACPI_TYPE_ANY;
 159
 160
 161     ACPI_FUNCTION_TRACE (NsAttachObject);
 162
 163
 164     /*
 165      * Parameter validation
 166      */
 167     if (!Node)
 168     {
 169         /* Invalid handle */
 170
 171         ACPI_ERROR ((AE_INFO, "Null NamedObj handle"));
 172         return_ACPI_STATUS (AE_BAD_PARAMETER);
 173     }
 174
 175     if (!Object && (ACPI_TYPE_ANY != Type))
 176     {
 177         /* Null object */
 178
 179         ACPI_ERROR ((AE_INFO,
 180             "Null object, but type not ACPI_TYPE_ANY"));
 181         return_ACPI_STATUS (AE_BAD_PARAMETER);
 182     }
 183
 184     if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
 185     {
 186         /* Not a name handle */
 187
 188         ACPI_ERROR ((AE_INFO, "Invalid handle %p [%s]",
 189             Node, AcpiUtGetDescriptorName (Node)));
 190         return_ACPI_STATUS (AE_BAD_PARAMETER);
 191     }
 192
 193     /* Check if this object is already attached */
 194
 195     if (Node->Object == Object)
 196     {
 197         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 198             "Obj %p already installed in NameObj %p\n",
 199             Object, Node));
 200
 201         return_ACPI_STATUS (AE_OK);
 202     }
 203
 204     /* If null object, we will just install it */
 205
 206     if (!Object)
 207     {
 208         ObjDesc    = NULL;
 209         ObjectType = ACPI_TYPE_ANY;
 210     }
 211
 212     /*
 213      * If the source object is a namespace Node with an attached object,
 214      * we will use that (attached) object
 215      */
 216     else if ((ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED) &&
 217             ((ACPI_NAMESPACE_NODE *) Object)->Object)
 218     {
 219         /*
 220          * Value passed is a name handle and that name has a
 221          * non-null value.  Use that name's value and type.
 222          */
 223         ObjDesc    = ((ACPI_NAMESPACE_NODE *) Object)->Object;
 224         ObjectType = ((ACPI_NAMESPACE_NODE *) Object)->Type;
 225     }
 226
 227     /*
 228      * Otherwise, we will use the parameter object, but we must type
 229      * it first
 230      */
 231     else
 232     {
 233         ObjDesc = (ACPI_OPERAND_OBJECT  *) Object;
 234
 235         /* Use the given type */
 236
 237         ObjectType = Type;
 238     }
 239
 240     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n",
 241         ObjDesc, Node, AcpiUtGetNodeName (Node)));
 242
 243     /* Detach an existing attached object if present */
 244
 245     if (Node->Object)
 246     {
 247         AcpiNsDetachObject (Node);
 248     }
 249
 250     if (ObjDesc)
 251     {
 252         /*
 253          * Must increment the new value's reference count
 254          * (if it is an internal object)
 255          */
 256         AcpiUtAddReference (ObjDesc);
 257
 258         /*
 259          * Handle objects with multiple descriptors - walk
 260          * to the end of the descriptor list
 261          */
 262         LastObjDesc = ObjDesc;
 263         while (LastObjDesc->Common.NextObject)
 264         {
 265             LastObjDesc = LastObjDesc->Common.NextObject;
 266         }
 267
 268         /* Install the object at the front of the object list */
 269
 270         LastObjDesc->Common.NextObject = Node->Object;
 271     }
 272
 273     Node->Type     = (UINT8) ObjectType;
 274     Node->Object   = ObjDesc;
 275
 276     return_ACPI_STATUS (AE_OK);
 277 }
 278
 279
 280 /*******************************************************************************
 281  *
 282  * FUNCTION:    AcpiNsDetachObject
 283  *
 284  * PARAMETERS:  Node           - A Namespace node whose object will be detached
 285  *
 286  * RETURN:      None.
 287  *
 288  * DESCRIPTION: Detach/delete an object associated with a namespace node.
 289  *              if the object is an allocated object, it is freed.
 290  *              Otherwise, the field is simply cleared.
 291  *
 292  ******************************************************************************/
 293
 294 void
 295 AcpiNsDetachObject (
 296     ACPI_NAMESPACE_NODE     *Node)
 297 {
 298     ACPI_OPERAND_OBJECT     *ObjDesc;
 299
 300
 301     ACPI_FUNCTION_TRACE (NsDetachObject);
 302
 303
 304     ObjDesc = Node->Object;
 305
 306     if (!ObjDesc ||
 307         (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA))
 308     {
 309         return_VOID;
 310     }
 311
 312     if (Node->Flags & ANOBJ_ALLOCATED_BUFFER)
 313     {
 314         /* Free the dynamic aml buffer */
 315
 316         if (ObjDesc->Common.Type == ACPI_TYPE_METHOD)
 317         {
 318             ACPI_FREE (ObjDesc->Method.AmlStart);
 319         }
 320     }
 321
 322     /* Clear the entry in all cases */
 323
 324     Node->Object = NULL;
 325     if (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) == ACPI_DESC_TYPE_OPERAND)
 326     {
 327         Node->Object = ObjDesc->Common.NextObject;
 328         if (Node->Object &&
 329            ((Node->Object)->Common.Type != ACPI_TYPE_LOCAL_DATA))
 330         {
 331             Node->Object = Node->Object->Common.NextObject;
 332         }
 333     }
 334
 335     /* Reset the node type to untyped */
 336
 337     Node->Type = ACPI_TYPE_ANY;
 338
 339     ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Node %p [%4.4s] Object %p\n",
 340         Node, AcpiUtGetNodeName (Node), ObjDesc));
 341
 342     /* Remove one reference on the object (and all subobjects) */
 343
 344     AcpiUtRemoveReference (ObjDesc);
 345     return_VOID;
 346 }
 347
 348
 349 /*******************************************************************************
 350  *
 351  * FUNCTION:    AcpiNsGetAttachedObject
 352  *
 353  * PARAMETERS:  Node             - Namespace node
 354  *
 355  * RETURN:      Current value of the object field from the Node whose
 356  *              handle is passed
 357  *
 358  * DESCRIPTION: Obtain the object attached to a namespace node.
 359  *
 360  ******************************************************************************/
 361
 362 ACPI_OPERAND_OBJECT *
 363 AcpiNsGetAttachedObject (
 364     ACPI_NAMESPACE_NODE     *Node)
 365 {
 366     ACPI_FUNCTION_TRACE_PTR (NsGetAttachedObject, Node);
 367
 368
 369     if (!Node)
 370     {
 371         ACPI_WARNING ((AE_INFO, "Null Node ptr"));
 372         return_PTR (NULL);
 373     }
 374
 375     if (!Node->Object ||
 376             ((ACPI_GET_DESCRIPTOR_TYPE (Node->Object) != ACPI_DESC_TYPE_OPERAND) &&
 377              (ACPI_GET_DESCRIPTOR_TYPE (Node->Object) != ACPI_DESC_TYPE_NAMED))  ||
 378         ((Node->Object)->Common.Type == ACPI_TYPE_LOCAL_DATA))
 379     {
 380         return_PTR (NULL);
 381     }
 382
 383     return_PTR (Node->Object);
 384 }
 385
 386
 387 /*******************************************************************************
 388  *
 389  * FUNCTION:    AcpiNsGetSecondaryObject
 390  *
 391  * PARAMETERS:  Node             - Namespace node
 392  *
 393  * RETURN:      Current value of the object field from the Node whose
 394  *              handle is passed.
 395  *
 396  * DESCRIPTION: Obtain a secondary object associated with a namespace node.
 397  *
 398  ******************************************************************************/
 399
 400 ACPI_OPERAND_OBJECT *
 401 AcpiNsGetSecondaryObject (
 402     ACPI_OPERAND_OBJECT     *ObjDesc)
 403 {
 404     ACPI_FUNCTION_TRACE_PTR (NsGetSecondaryObject, ObjDesc);
 405
 406
 407     if ((!ObjDesc)                                     ||
 408         (ObjDesc->Common.Type== ACPI_TYPE_LOCAL_DATA)  ||
 409         (!ObjDesc->Common.NextObject)                  ||
 410         ((ObjDesc->Common.NextObject)->Common.Type == ACPI_TYPE_LOCAL_DATA))
 411     {
 412         return_PTR (NULL);
 413     }
 414
 415     return_PTR (ObjDesc->Common.NextObject);
 416 }
 417
 418
 419 /*******************************************************************************
 420  *
 421  * FUNCTION:    AcpiNsAttachData
 422  *
 423  * PARAMETERS:  Node            - Namespace node
 424  *              Handler         - Handler to be associated with the data
 425  *              Data            - Data to be attached
 426  *
 427  * RETURN:      Status
 428  *
 429  * DESCRIPTION: Low-level attach data.  Create and attach a Data object.
 430  *
 431  ******************************************************************************/
 432
 433 ACPI_STATUS
 434 AcpiNsAttachData (
 435     ACPI_NAMESPACE_NODE     *Node,
 436     ACPI_OBJECT_HANDLER     Handler,
 437     void                    *Data)
 438 {
 439     ACPI_OPERAND_OBJECT     *PrevObjDesc;
 440     ACPI_OPERAND_OBJECT     *ObjDesc;
 441     ACPI_OPERAND_OBJECT     *DataDesc;
 442
 443
 444     /* We only allow one attachment per handler */
 445
 446     PrevObjDesc = NULL;
 447     ObjDesc = Node->Object;
 448     while (ObjDesc)
 449     {
 450         if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
 451             (ObjDesc->Data.Handler == Handler))
 452         {
 453             return (AE_ALREADY_EXISTS);
 454         }
 455
 456         PrevObjDesc = ObjDesc;
 457         ObjDesc = ObjDesc->Common.NextObject;
 458     }
 459
 460     /* Create an internal object for the data */
 461
 462     DataDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_DATA);
 463     if (!DataDesc)
 464     {
 465         return (AE_NO_MEMORY);
 466     }
 467
 468     DataDesc->Data.Handler = Handler;
 469     DataDesc->Data.Pointer = Data;
 470
 471     /* Install the data object */
 472
 473     if (PrevObjDesc)
 474     {
 475         PrevObjDesc->Common.NextObject = DataDesc;
 476     }
 477     else
 478     {
 479         Node->Object = DataDesc;
 480     }
 481
 482     return (AE_OK);
 483 }
 484
 485
 486 /*******************************************************************************
 487  *
 488  * FUNCTION:    AcpiNsDetachData
 489  *
 490  * PARAMETERS:  Node            - Namespace node
 491  *              Handler         - Handler associated with the data
 492  *
 493  * RETURN:      Status
 494  *
 495  * DESCRIPTION: Low-level detach data.  Delete the data node, but the caller
 496  *              is responsible for the actual data.
 497  *
 498  ******************************************************************************/
 499
 500 ACPI_STATUS
 501 AcpiNsDetachData (
 502     ACPI_NAMESPACE_NODE     *Node,
 503     ACPI_OBJECT_HANDLER     Handler)
 504 {
 505     ACPI_OPERAND_OBJECT     *ObjDesc;
 506     ACPI_OPERAND_OBJECT     *PrevObjDesc;
 507
 508
 509     PrevObjDesc = NULL;
 510     ObjDesc = Node->Object;
 511     while (ObjDesc)
 512     {
 513         if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
 514             (ObjDesc->Data.Handler == Handler))
 515         {
 516             if (PrevObjDesc)
 517             {
 518                 PrevObjDesc->Common.NextObject = ObjDesc->Common.NextObject;
 519             }
 520             else
 521             {
 522                 Node->Object = ObjDesc->Common.NextObject;
 523             }
 524
 525             AcpiUtRemoveReference (ObjDesc);
 526             return (AE_OK);
 527         }
 528
 529         PrevObjDesc = ObjDesc;
 530         ObjDesc = ObjDesc->Common.NextObject;
 531     }
 532
 533     return (AE_NOT_FOUND);
 534 }
 535
 536
 537 /*******************************************************************************
 538  *
 539  * FUNCTION:    AcpiNsGetAttachedData
 540  *
 541  * PARAMETERS:  Node            - Namespace node
 542  *              Handler         - Handler associated with the data
 543  *              Data            - Where the data is returned
 544  *
 545  * RETURN:      Status
 546  *
 547  * DESCRIPTION: Low level interface to obtain data previously associated with
 548  *              a namespace node.
 549  *
 550  ******************************************************************************/
 551
 552 ACPI_STATUS
 553 AcpiNsGetAttachedData (
 554     ACPI_NAMESPACE_NODE     *Node,
 555     ACPI_OBJECT_HANDLER     Handler,
 556     void                    **Data)
 557 {
 558     ACPI_OPERAND_OBJECT     *ObjDesc;
 559
 560
 561     ObjDesc = Node->Object;
 562     while (ObjDesc)
 563     {
 564         if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
 565             (ObjDesc->Data.Handler == Handler))
 566         {
 567             *Data = ObjDesc->Data.Pointer;
 568             return (AE_OK);
 569         }
 570
 571         ObjDesc = ObjDesc->Common.NextObject;
 572     }
 573
 574     return (AE_NOT_FOUND);
 575 }
 576
 577