nsxfeval.c revision 128212
1/******************************************************************************* 2 * 3 * Module Name: nsxfeval - Public interfaces to the ACPI subsystem 4 * ACPI Object evaluation interfaces 5 * $Revision: 12 $ 6 * 7 ******************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118 119#define __NSXFEVAL_C__ 120 121#include "acpi.h" 122#include "acnamesp.h" 123#include "acinterp.h" 124 125 126#define _COMPONENT ACPI_NAMESPACE 127 ACPI_MODULE_NAME ("nsxfeval") 128 129 130/******************************************************************************* 131 * 132 * FUNCTION: AcpiEvaluateObjectTyped 133 * 134 * PARAMETERS: Handle - Object handle (optional) 135 * *Pathname - Object pathname (optional) 136 * **ExternalParams - List of parameters to pass to method, 137 * terminated by NULL. May be NULL 138 * if no parameters are being passed. 139 * *ReturnBuffer - Where to put method's return value (if 140 * any). If NULL, no value is returned. 141 * ReturnType - Expected type of return object 142 * 143 * RETURN: Status 144 * 145 * DESCRIPTION: Find and evaluate the given object, passing the given 146 * parameters if necessary. One of "Handle" or "Pathname" must 147 * be valid (non-null) 148 * 149 ******************************************************************************/ 150 151ACPI_STATUS 152AcpiEvaluateObjectTyped ( 153 ACPI_HANDLE Handle, 154 ACPI_STRING Pathname, 155 ACPI_OBJECT_LIST *ExternalParams, 156 ACPI_BUFFER *ReturnBuffer, 157 ACPI_OBJECT_TYPE ReturnType) 158{ 159 ACPI_STATUS Status; 160 BOOLEAN MustFree = FALSE; 161 162 163 ACPI_FUNCTION_TRACE ("AcpiEvaluateObjectTyped"); 164 165 166 /* Return buffer must be valid */ 167 168 if (!ReturnBuffer) 169 { 170 return_ACPI_STATUS (AE_BAD_PARAMETER); 171 } 172 173 if (ReturnBuffer->Length == ACPI_ALLOCATE_BUFFER) 174 { 175 MustFree = TRUE; 176 } 177 178 /* Evaluate the object */ 179 180 Status = AcpiEvaluateObject (Handle, Pathname, ExternalParams, ReturnBuffer); 181 if (ACPI_FAILURE (Status)) 182 { 183 return_ACPI_STATUS (Status); 184 } 185 186 /* Type ANY means "don't care" */ 187 188 if (ReturnType == ACPI_TYPE_ANY) 189 { 190 return_ACPI_STATUS (AE_OK); 191 } 192 193 if (ReturnBuffer->Length == 0) 194 { 195 /* Error because caller specifically asked for a return value */ 196 197 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 198 "No return value\n")); 199 200 return_ACPI_STATUS (AE_NULL_OBJECT); 201 } 202 203 /* Examine the object type returned from EvaluateObject */ 204 205 if (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type == ReturnType) 206 { 207 return_ACPI_STATUS (AE_OK); 208 } 209 210 /* Return object type does not match requested type */ 211 212 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 213 "Incorrect return type [%s] requested [%s]\n", 214 AcpiUtGetTypeName (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type), 215 AcpiUtGetTypeName (ReturnType))); 216 217 if (MustFree) 218 { 219 /* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */ 220 221 AcpiOsFree (ReturnBuffer->Pointer); 222 ReturnBuffer->Pointer = NULL; 223 } 224 225 ReturnBuffer->Length = 0; 226 return_ACPI_STATUS (AE_TYPE); 227} 228 229 230/******************************************************************************* 231 * 232 * FUNCTION: AcpiEvaluateObject 233 * 234 * PARAMETERS: Handle - Object handle (optional) 235 * Pathname - Object pathname (optional) 236 * ExternalParams - List of parameters to pass to method, 237 * terminated by NULL. May be NULL 238 * if no parameters are being passed. 239 * ReturnBuffer - Where to put method's return value (if 240 * any). If NULL, no value is returned. 241 * 242 * RETURN: Status 243 * 244 * DESCRIPTION: Find and evaluate the given object, passing the given 245 * parameters if necessary. One of "Handle" or "Pathname" must 246 * be valid (non-null) 247 * 248 ******************************************************************************/ 249 250ACPI_STATUS 251AcpiEvaluateObject ( 252 ACPI_HANDLE Handle, 253 ACPI_STRING Pathname, 254 ACPI_OBJECT_LIST *ExternalParams, 255 ACPI_BUFFER *ReturnBuffer) 256{ 257 ACPI_STATUS Status; 258 ACPI_STATUS Status2; 259 ACPI_OPERAND_OBJECT **InternalParams = NULL; 260 ACPI_OPERAND_OBJECT *InternalReturnObj = NULL; 261 ACPI_SIZE BufferSpaceNeeded; 262 UINT32 i; 263 264 265 ACPI_FUNCTION_TRACE ("AcpiEvaluateObject"); 266 267 268 /* 269 * If there are parameters to be passed to the object 270 * (which must be a control method), the external objects 271 * must be converted to internal objects 272 */ 273 if (ExternalParams && ExternalParams->Count) 274 { 275 /* 276 * Allocate a new parameter block for the internal objects 277 * Add 1 to count to allow for null terminated internal list 278 */ 279 InternalParams = ACPI_MEM_CALLOCATE (((ACPI_SIZE) ExternalParams->Count + 1) * 280 sizeof (void *)); 281 if (!InternalParams) 282 { 283 return_ACPI_STATUS (AE_NO_MEMORY); 284 } 285 286 /* 287 * Convert each external object in the list to an 288 * internal object 289 */ 290 for (i = 0; i < ExternalParams->Count; i++) 291 { 292 Status = AcpiUtCopyEobjectToIobject (&ExternalParams->Pointer[i], 293 &InternalParams[i]); 294 if (ACPI_FAILURE (Status)) 295 { 296 AcpiUtDeleteInternalObjectList (InternalParams); 297 return_ACPI_STATUS (Status); 298 } 299 } 300 InternalParams[ExternalParams->Count] = NULL; 301 } 302 303 /* 304 * Three major cases: 305 * 1) Fully qualified pathname 306 * 2) No handle, not fully qualified pathname (error) 307 * 3) Valid handle 308 */ 309 if ((Pathname) && 310 (AcpiNsValidRootPrefix (Pathname[0]))) 311 { 312 /* 313 * The path is fully qualified, just evaluate by name 314 */ 315 Status = AcpiNsEvaluateByName (Pathname, InternalParams, 316 &InternalReturnObj); 317 } 318 else if (!Handle) 319 { 320 /* 321 * A handle is optional iff a fully qualified pathname 322 * is specified. Since we've already handled fully 323 * qualified names above, this is an error 324 */ 325 if (!Pathname) 326 { 327 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 328 "Both Handle and Pathname are NULL\n")); 329 } 330 else 331 { 332 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 333 "Handle is NULL and Pathname is relative\n")); 334 } 335 336 Status = AE_BAD_PARAMETER; 337 } 338 else 339 { 340 /* 341 * We get here if we have a handle -- and if we have a 342 * pathname it is relative. The handle will be validated 343 * in the lower procedures 344 */ 345 if (!Pathname) 346 { 347 /* 348 * The null pathname case means the handle is for 349 * the actual object to be evaluated 350 */ 351 Status = AcpiNsEvaluateByHandle (Handle, InternalParams, 352 &InternalReturnObj); 353 } 354 else 355 { 356 /* 357 * Both a Handle and a relative Pathname 358 */ 359 Status = AcpiNsEvaluateRelative (Handle, Pathname, InternalParams, 360 &InternalReturnObj); 361 } 362 } 363 364 365 /* 366 * If we are expecting a return value, and all went well above, 367 * copy the return value to an external object. 368 */ 369 if (ReturnBuffer) 370 { 371 if (!InternalReturnObj) 372 { 373 ReturnBuffer->Length = 0; 374 } 375 else 376 { 377 if (ACPI_GET_DESCRIPTOR_TYPE (InternalReturnObj) == ACPI_DESC_TYPE_NAMED) 378 { 379 /* 380 * If we received a NS Node as a return object, this means that 381 * the object we are evaluating has nothing interesting to 382 * return (such as a mutex, etc.) We return an error because 383 * these types are essentially unsupported by this interface. 384 * We don't check up front because this makes it easier to add 385 * support for various types at a later date if necessary. 386 */ 387 Status = AE_TYPE; 388 InternalReturnObj = NULL; /* No need to delete a NS Node */ 389 ReturnBuffer->Length = 0; 390 } 391 392 if (ACPI_SUCCESS (Status)) 393 { 394 /* 395 * Find out how large a buffer is needed 396 * to contain the returned object 397 */ 398 Status = AcpiUtGetObjectSize (InternalReturnObj, 399 &BufferSpaceNeeded); 400 if (ACPI_SUCCESS (Status)) 401 { 402 /* Validate/Allocate/Clear caller buffer */ 403 404 Status = AcpiUtInitializeBuffer (ReturnBuffer, BufferSpaceNeeded); 405 if (ACPI_FAILURE (Status)) 406 { 407 /* 408 * Caller's buffer is too small or a new one can't be allocated 409 */ 410 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 411 "Needed buffer size %X, %s\n", 412 (UINT32) BufferSpaceNeeded, AcpiFormatException (Status))); 413 } 414 else 415 { 416 /* 417 * We have enough space for the object, build it 418 */ 419 Status = AcpiUtCopyIobjectToEobject (InternalReturnObj, 420 ReturnBuffer); 421 } 422 } 423 } 424 } 425 } 426 427 if (InternalReturnObj) 428 { 429 /* 430 * Delete the internal return object. NOTE: Interpreter 431 * must be locked to avoid race condition. 432 */ 433 Status2 = AcpiExEnterInterpreter (); 434 if (ACPI_SUCCESS (Status2)) 435 { 436 /* 437 * Delete the internal return object. (Or at least 438 * decrement the reference count by one) 439 */ 440 AcpiUtRemoveReference (InternalReturnObj); 441 AcpiExExitInterpreter (); 442 } 443 } 444 445 /* 446 * Free the input parameter list (if we created one), 447 */ 448 if (InternalParams) 449 { 450 /* Free the allocated parameter block */ 451 452 AcpiUtDeleteInternalObjectList (InternalParams); 453 } 454 455 return_ACPI_STATUS (Status); 456} 457 458 459/******************************************************************************* 460 * 461 * FUNCTION: AcpiWalkNamespace 462 * 463 * PARAMETERS: Type - ACPI_OBJECT_TYPE to search for 464 * StartObject - Handle in namespace where search begins 465 * MaxDepth - Depth to which search is to reach 466 * UserFunction - Called when an object of "Type" is found 467 * Context - Passed to user function 468 * ReturnValue - Location where return value of 469 * UserFunction is put if terminated early 470 * 471 * RETURNS Return value from the UserFunction if terminated early. 472 * Otherwise, returns NULL. 473 * 474 * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, 475 * starting (and ending) at the object specified by StartHandle. 476 * The UserFunction is called whenever an object that matches 477 * the type parameter is found. If the user function returns 478 * a non-zero value, the search is terminated immediately and this 479 * value is returned to the caller. 480 * 481 * The point of this procedure is to provide a generic namespace 482 * walk routine that can be called from multiple places to 483 * provide multiple services; the User Function can be tailored 484 * to each task, whether it is a print function, a compare 485 * function, etc. 486 * 487 ******************************************************************************/ 488 489ACPI_STATUS 490AcpiWalkNamespace ( 491 ACPI_OBJECT_TYPE Type, 492 ACPI_HANDLE StartObject, 493 UINT32 MaxDepth, 494 ACPI_WALK_CALLBACK UserFunction, 495 void *Context, 496 void **ReturnValue) 497{ 498 ACPI_STATUS Status; 499 500 501 ACPI_FUNCTION_TRACE ("AcpiWalkNamespace"); 502 503 504 /* Parameter validation */ 505 506 if ((Type > ACPI_TYPE_EXTERNAL_MAX) || 507 (!MaxDepth) || 508 (!UserFunction)) 509 { 510 return_ACPI_STATUS (AE_BAD_PARAMETER); 511 } 512 513 /* 514 * Lock the namespace around the walk. 515 * The namespace will be unlocked/locked around each call 516 * to the user function - since this function 517 * must be allowed to make Acpi calls itself. 518 */ 519 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 520 if (ACPI_FAILURE (Status)) 521 { 522 return_ACPI_STATUS (Status); 523 } 524 525 Status = AcpiNsWalkNamespace (Type, StartObject, MaxDepth, ACPI_NS_WALK_UNLOCK, 526 UserFunction, Context, ReturnValue); 527 528 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 529 return_ACPI_STATUS (Status); 530} 531 532 533/******************************************************************************* 534 * 535 * FUNCTION: AcpiNsGetDeviceCallback 536 * 537 * PARAMETERS: Callback from AcpiGetDevice 538 * 539 * RETURN: Status 540 * 541 * DESCRIPTION: Takes callbacks from WalkNamespace and filters out all non- 542 * present devices, or if they specified a HID, it filters based 543 * on that. 544 * 545 ******************************************************************************/ 546 547static ACPI_STATUS 548AcpiNsGetDeviceCallback ( 549 ACPI_HANDLE ObjHandle, 550 UINT32 NestingLevel, 551 void *Context, 552 void **ReturnValue) 553{ 554 ACPI_GET_DEVICES_INFO *Info = Context; 555 ACPI_STATUS Status; 556 ACPI_NAMESPACE_NODE *Node; 557 UINT32 Flags; 558 ACPI_DEVICE_ID Hid; 559 ACPI_COMPATIBLE_ID_LIST *Cid; 560 ACPI_NATIVE_UINT i; 561 562 563 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 564 if (ACPI_FAILURE (Status)) 565 { 566 return (Status); 567 } 568 569 Node = AcpiNsMapHandleToNode (ObjHandle); 570 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 571 if (ACPI_FAILURE (Status)) 572 { 573 return (Status); 574 } 575 576 if (!Node) 577 { 578 return (AE_BAD_PARAMETER); 579 } 580 581 /* Run _STA to determine if device is present */ 582 583 Status = AcpiUtExecute_STA (Node, &Flags); 584 if (ACPI_FAILURE (Status)) 585 { 586 return (AE_CTRL_DEPTH); 587 } 588 589 if (!(Flags & 0x01)) 590 { 591 /* Don't return at the device or children of the device if not there */ 592 593 return (AE_CTRL_DEPTH); 594 } 595 596 /* Filter based on device HID & CID */ 597 598 if (Info->Hid != NULL) 599 { 600 Status = AcpiUtExecute_HID (Node, &Hid); 601 if (Status == AE_NOT_FOUND) 602 { 603 return (AE_OK); 604 } 605 else if (ACPI_FAILURE (Status)) 606 { 607 return (AE_CTRL_DEPTH); 608 } 609 610 if (ACPI_STRNCMP (Hid.Value, Info->Hid, sizeof (Hid.Value)) != 0) 611 { 612 /* Get the list of Compatible IDs */ 613 614 Status = AcpiUtExecute_CID (Node, &Cid); 615 if (Status == AE_NOT_FOUND) 616 { 617 return (AE_OK); 618 } 619 else if (ACPI_FAILURE (Status)) 620 { 621 return (AE_CTRL_DEPTH); 622 } 623 624 /* Walk the CID list */ 625 626 for (i = 0; i < Cid->Count; i++) 627 { 628 if (ACPI_STRNCMP (Cid->Id[i].Value, Info->Hid, 629 sizeof (ACPI_COMPATIBLE_ID)) != 0) 630 { 631 ACPI_MEM_FREE (Cid); 632 return (AE_OK); 633 } 634 } 635 ACPI_MEM_FREE (Cid); 636 } 637 } 638 639 Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context, ReturnValue); 640 return (Status); 641} 642 643 644/******************************************************************************* 645 * 646 * FUNCTION: AcpiGetDevices 647 * 648 * PARAMETERS: HID - HID to search for. Can be NULL. 649 * UserFunction - Called when a matching object is found 650 * Context - Passed to user function 651 * ReturnValue - Location where return value of 652 * UserFunction is put if terminated early 653 * 654 * RETURNS Return value from the UserFunction if terminated early. 655 * Otherwise, returns NULL. 656 * 657 * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, 658 * starting (and ending) at the object specified by StartHandle. 659 * The UserFunction is called whenever an object of type 660 * Device is found. If the user function returns 661 * a non-zero value, the search is terminated immediately and this 662 * value is returned to the caller. 663 * 664 * This is a wrapper for WalkNamespace, but the callback performs 665 * additional filtering. Please see AcpiGetDeviceCallback. 666 * 667 ******************************************************************************/ 668 669ACPI_STATUS 670AcpiGetDevices ( 671 char *HID, 672 ACPI_WALK_CALLBACK UserFunction, 673 void *Context, 674 void **ReturnValue) 675{ 676 ACPI_STATUS Status; 677 ACPI_GET_DEVICES_INFO Info; 678 679 680 ACPI_FUNCTION_TRACE ("AcpiGetDevices"); 681 682 683 /* Parameter validation */ 684 685 if (!UserFunction) 686 { 687 return_ACPI_STATUS (AE_BAD_PARAMETER); 688 } 689 690 /* 691 * We're going to call their callback from OUR callback, so we need 692 * to know what it is, and their context parameter. 693 */ 694 Info.Context = Context; 695 Info.UserFunction = UserFunction; 696 Info.Hid = HID; 697 698 /* 699 * Lock the namespace around the walk. 700 * The namespace will be unlocked/locked around each call 701 * to the user function - since this function 702 * must be allowed to make Acpi calls itself. 703 */ 704 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 705 if (ACPI_FAILURE (Status)) 706 { 707 return_ACPI_STATUS (Status); 708 } 709 710 Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, 711 ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, 712 ACPI_NS_WALK_UNLOCK, 713 AcpiNsGetDeviceCallback, &Info, 714 ReturnValue); 715 716 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 717 return_ACPI_STATUS (Status); 718} 719 720 721/******************************************************************************* 722 * 723 * FUNCTION: AcpiAttachData 724 * 725 * PARAMETERS: ObjHandle - Namespace node 726 * Handler - Handler for this attachment 727 * Data - Pointer to data to be attached 728 * 729 * RETURN: Status 730 * 731 * DESCRIPTION: Attach arbitrary data and handler to a namespace node. 732 * 733 ******************************************************************************/ 734 735ACPI_STATUS 736AcpiAttachData ( 737 ACPI_HANDLE ObjHandle, 738 ACPI_OBJECT_HANDLER Handler, 739 void *Data) 740{ 741 ACPI_NAMESPACE_NODE *Node; 742 ACPI_STATUS Status; 743 744 745 /* Parameter validation */ 746 747 if (!ObjHandle || 748 !Handler || 749 !Data) 750 { 751 return (AE_BAD_PARAMETER); 752 } 753 754 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 755 if (ACPI_FAILURE (Status)) 756 { 757 return (Status); 758 } 759 760 /* Convert and validate the handle */ 761 762 Node = AcpiNsMapHandleToNode (ObjHandle); 763 if (!Node) 764 { 765 Status = AE_BAD_PARAMETER; 766 goto UnlockAndExit; 767 } 768 769 Status = AcpiNsAttachData (Node, Handler, Data); 770 771UnlockAndExit: 772 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 773 return (Status); 774} 775 776 777/******************************************************************************* 778 * 779 * FUNCTION: AcpiDetachData 780 * 781 * PARAMETERS: ObjHandle - Namespace node handle 782 * Handler - Handler used in call to AcpiAttachData 783 * 784 * RETURN: Status 785 * 786 * DESCRIPTION: Remove data that was previously attached to a node. 787 * 788 ******************************************************************************/ 789 790ACPI_STATUS 791AcpiDetachData ( 792 ACPI_HANDLE ObjHandle, 793 ACPI_OBJECT_HANDLER Handler) 794{ 795 ACPI_NAMESPACE_NODE *Node; 796 ACPI_STATUS Status; 797 798 799 /* Parameter validation */ 800 801 if (!ObjHandle || 802 !Handler) 803 { 804 return (AE_BAD_PARAMETER); 805 } 806 807 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 808 if (ACPI_FAILURE (Status)) 809 { 810 return (Status); 811 } 812 813 /* Convert and validate the handle */ 814 815 Node = AcpiNsMapHandleToNode (ObjHandle); 816 if (!Node) 817 { 818 Status = AE_BAD_PARAMETER; 819 goto UnlockAndExit; 820 } 821 822 Status = AcpiNsDetachData (Node, Handler); 823 824UnlockAndExit: 825 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 826 return (Status); 827} 828 829 830/******************************************************************************* 831 * 832 * FUNCTION: AcpiGetData 833 * 834 * PARAMETERS: ObjHandle - Namespace node 835 * Handler - Handler used in call to AttachData 836 * Data - Where the data is returned 837 * 838 * RETURN: Status 839 * 840 * DESCRIPTION: Retrieve data that was previously attached to a namespace node. 841 * 842 ******************************************************************************/ 843 844ACPI_STATUS 845AcpiGetData ( 846 ACPI_HANDLE ObjHandle, 847 ACPI_OBJECT_HANDLER Handler, 848 void **Data) 849{ 850 ACPI_NAMESPACE_NODE *Node; 851 ACPI_STATUS Status; 852 853 854 /* Parameter validation */ 855 856 if (!ObjHandle || 857 !Handler || 858 !Data) 859 { 860 return (AE_BAD_PARAMETER); 861 } 862 863 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 864 if (ACPI_FAILURE (Status)) 865 { 866 return (Status); 867 } 868 869 /* Convert and validate the handle */ 870 871 Node = AcpiNsMapHandleToNode (ObjHandle); 872 if (!Node) 873 { 874 Status = AE_BAD_PARAMETER; 875 goto UnlockAndExit; 876 } 877 878 Status = AcpiNsGetAttachedData (Node, Handler, Data); 879 880UnlockAndExit: 881 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 882 return (Status); 883} 884 885 886