1 /******************************************************************************* 2 * 3 * Module Name: rsxface - Public interfaces to the resource manager 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, Intel Corp. 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 #define EXPORT_ACPI_INTERFACES 45 46 #include <contrib/dev/acpica/include/acpi.h> 47 #include <contrib/dev/acpica/include/accommon.h> 48 #include <contrib/dev/acpica/include/acresrc.h> 49 #include <contrib/dev/acpica/include/acnamesp.h> 50 51 #define _COMPONENT ACPI_RESOURCES 52 ACPI_MODULE_NAME ("rsxface") 53 54 /* Local macros for 16,32-bit to 64-bit conversion */ 55 56 #define ACPI_COPY_FIELD(Out, In, Field) ((Out)->Field = (In)->Field) 57 #define ACPI_COPY_ADDRESS(Out, In) \ 58 ACPI_COPY_FIELD(Out, In, ResourceType); \ 59 ACPI_COPY_FIELD(Out, In, ProducerConsumer); \ 60 ACPI_COPY_FIELD(Out, In, Decode); \ 61 ACPI_COPY_FIELD(Out, In, MinAddressFixed); \ 62 ACPI_COPY_FIELD(Out, In, MaxAddressFixed); \ 63 ACPI_COPY_FIELD(Out, In, Info); \ 64 ACPI_COPY_FIELD(Out, In, Address.Granularity); \ 65 ACPI_COPY_FIELD(Out, In, Address.Minimum); \ 66 ACPI_COPY_FIELD(Out, In, Address.Maximum); \ 67 ACPI_COPY_FIELD(Out, In, Address.TranslationOffset); \ 68 ACPI_COPY_FIELD(Out, In, Address.AddressLength); \ 69 ACPI_COPY_FIELD(Out, In, ResourceSource); 70 71 72 /* Local prototypes */ 73 74 static ACPI_STATUS 75 AcpiRsMatchVendorResource ( 76 ACPI_RESOURCE *Resource, 77 void *Context); 78 79 static ACPI_STATUS 80 AcpiRsValidateParameters ( 81 ACPI_HANDLE DeviceHandle, 82 ACPI_BUFFER *Buffer, 83 ACPI_NAMESPACE_NODE **ReturnNode); 84 85 86 /******************************************************************************* 87 * 88 * FUNCTION: AcpiRsValidateParameters 89 * 90 * PARAMETERS: DeviceHandle - Handle to a device 91 * Buffer - Pointer to a data buffer 92 * ReturnNode - Pointer to where the device node is returned 93 * 94 * RETURN: Status 95 * 96 * DESCRIPTION: Common parameter validation for resource interfaces 97 * 98 ******************************************************************************/ 99 100 static ACPI_STATUS 101 AcpiRsValidateParameters ( 102 ACPI_HANDLE DeviceHandle, 103 ACPI_BUFFER *Buffer, 104 ACPI_NAMESPACE_NODE **ReturnNode) 105 { 106 ACPI_STATUS Status; 107 ACPI_NAMESPACE_NODE *Node; 108 109 110 ACPI_FUNCTION_TRACE (RsValidateParameters); 111 112 113 /* 114 * Must have a valid handle to an ACPI device 115 */ 116 if (!DeviceHandle) 117 { 118 return_ACPI_STATUS (AE_BAD_PARAMETER); 119 } 120 121 Node = AcpiNsValidateHandle (DeviceHandle); 122 if (!Node) 123 { 124 return_ACPI_STATUS (AE_BAD_PARAMETER); 125 } 126 127 if (Node->Type != ACPI_TYPE_DEVICE) 128 { 129 return_ACPI_STATUS (AE_TYPE); 130 } 131 132 /* 133 * Validate the user buffer object 134 * 135 * if there is a non-zero buffer length we also need a valid pointer in 136 * the buffer. If it's a zero buffer length, we'll be returning the 137 * needed buffer size (later), so keep going. 138 */ 139 Status = AcpiUtValidateBuffer (Buffer); 140 if (ACPI_FAILURE (Status)) 141 { 142 return_ACPI_STATUS (Status); 143 } 144 145 *ReturnNode = Node; 146 return_ACPI_STATUS (AE_OK); 147 } 148 149 150 /******************************************************************************* 151 * 152 * FUNCTION: AcpiGetIrqRoutingTable 153 * 154 * PARAMETERS: DeviceHandle - Handle to the Bus device we are querying 155 * RetBuffer - Pointer to a buffer to receive the 156 * current resources for the device 157 * 158 * RETURN: Status 159 * 160 * DESCRIPTION: This function is called to get the IRQ routing table for a 161 * specific bus. The caller must first acquire a handle for the 162 * desired bus. The routine table is placed in the buffer pointed 163 * to by the RetBuffer variable parameter. 164 * 165 * If the function fails an appropriate status will be returned 166 * and the value of RetBuffer is undefined. 167 * 168 * This function attempts to execute the _PRT method contained in 169 * the object indicated by the passed DeviceHandle. 170 * 171 ******************************************************************************/ 172 173 ACPI_STATUS 174 AcpiGetIrqRoutingTable ( 175 ACPI_HANDLE DeviceHandle, 176 ACPI_BUFFER *RetBuffer) 177 { 178 ACPI_STATUS Status; 179 ACPI_NAMESPACE_NODE *Node; 180 181 182 ACPI_FUNCTION_TRACE (AcpiGetIrqRoutingTable); 183 184 185 /* Validate parameters then dispatch to internal routine */ 186 187 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 188 if (ACPI_FAILURE (Status)) 189 { 190 return_ACPI_STATUS (Status); 191 } 192 193 Status = AcpiRsGetPrtMethodData (Node, RetBuffer); 194 return_ACPI_STATUS (Status); 195 } 196 197 ACPI_EXPORT_SYMBOL (AcpiGetIrqRoutingTable) 198 199 200 /******************************************************************************* 201 * 202 * FUNCTION: AcpiGetCurrentResources 203 * 204 * PARAMETERS: DeviceHandle - Handle to the device object for the 205 * device we are querying 206 * RetBuffer - Pointer to a buffer to receive the 207 * current resources for the device 208 * 209 * RETURN: Status 210 * 211 * DESCRIPTION: This function is called to get the current resources for a 212 * specific device. The caller must first acquire a handle for 213 * the desired device. The resource data is placed in the buffer 214 * pointed to by the RetBuffer variable parameter. 215 * 216 * If the function fails an appropriate status will be returned 217 * and the value of RetBuffer is undefined. 218 * 219 * This function attempts to execute the _CRS method contained in 220 * the object indicated by the passed DeviceHandle. 221 * 222 ******************************************************************************/ 223 224 ACPI_STATUS 225 AcpiGetCurrentResources ( 226 ACPI_HANDLE DeviceHandle, 227 ACPI_BUFFER *RetBuffer) 228 { 229 ACPI_STATUS Status; 230 ACPI_NAMESPACE_NODE *Node; 231 232 233 ACPI_FUNCTION_TRACE (AcpiGetCurrentResources); 234 235 236 /* Validate parameters then dispatch to internal routine */ 237 238 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 239 if (ACPI_FAILURE (Status)) 240 { 241 return_ACPI_STATUS (Status); 242 } 243 244 Status = AcpiRsGetCrsMethodData (Node, RetBuffer); 245 return_ACPI_STATUS (Status); 246 } 247 248 ACPI_EXPORT_SYMBOL (AcpiGetCurrentResources) 249 250 251 /******************************************************************************* 252 * 253 * FUNCTION: AcpiGetPossibleResources 254 * 255 * PARAMETERS: DeviceHandle - Handle to the device object for the 256 * device we are querying 257 * RetBuffer - Pointer to a buffer to receive the 258 * resources for the device 259 * 260 * RETURN: Status 261 * 262 * DESCRIPTION: This function is called to get a list of the possible resources 263 * for a specific device. The caller must first acquire a handle 264 * for the desired device. The resource data is placed in the 265 * buffer pointed to by the RetBuffer variable. 266 * 267 * If the function fails an appropriate status will be returned 268 * and the value of RetBuffer is undefined. 269 * 270 ******************************************************************************/ 271 272 ACPI_STATUS 273 AcpiGetPossibleResources ( 274 ACPI_HANDLE DeviceHandle, 275 ACPI_BUFFER *RetBuffer) 276 { 277 ACPI_STATUS Status; 278 ACPI_NAMESPACE_NODE *Node; 279 280 281 ACPI_FUNCTION_TRACE (AcpiGetPossibleResources); 282 283 284 /* Validate parameters then dispatch to internal routine */ 285 286 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 287 if (ACPI_FAILURE (Status)) 288 { 289 return_ACPI_STATUS (Status); 290 } 291 292 Status = AcpiRsGetPrsMethodData (Node, RetBuffer); 293 return_ACPI_STATUS (Status); 294 } 295 296 ACPI_EXPORT_SYMBOL (AcpiGetPossibleResources) 297 298 299 /******************************************************************************* 300 * 301 * FUNCTION: AcpiSetCurrentResources 302 * 303 * PARAMETERS: DeviceHandle - Handle to the device object for the 304 * device we are setting resources 305 * InBuffer - Pointer to a buffer containing the 306 * resources to be set for the device 307 * 308 * RETURN: Status 309 * 310 * DESCRIPTION: This function is called to set the current resources for a 311 * specific device. The caller must first acquire a handle for 312 * the desired device. The resource data is passed to the routine 313 * the buffer pointed to by the InBuffer variable. 314 * 315 ******************************************************************************/ 316 317 ACPI_STATUS 318 AcpiSetCurrentResources ( 319 ACPI_HANDLE DeviceHandle, 320 ACPI_BUFFER *InBuffer) 321 { 322 ACPI_STATUS Status; 323 ACPI_NAMESPACE_NODE *Node; 324 325 326 ACPI_FUNCTION_TRACE (AcpiSetCurrentResources); 327 328 329 /* Validate the buffer, don't allow zero length */ 330 331 if ((!InBuffer) || 332 (!InBuffer->Pointer) || 333 (!InBuffer->Length)) 334 { 335 return_ACPI_STATUS (AE_BAD_PARAMETER); 336 } 337 338 /* Validate parameters then dispatch to internal routine */ 339 340 Status = AcpiRsValidateParameters (DeviceHandle, InBuffer, &Node); 341 if (ACPI_FAILURE (Status)) 342 { 343 return_ACPI_STATUS (Status); 344 } 345 346 Status = AcpiRsSetSrsMethodData (Node, InBuffer); 347 return_ACPI_STATUS (Status); 348 } 349 350 ACPI_EXPORT_SYMBOL (AcpiSetCurrentResources) 351 352 353 /******************************************************************************* 354 * 355 * FUNCTION: AcpiGetEventResources 356 * 357 * PARAMETERS: DeviceHandle - Handle to the device object for the 358 * device we are getting resources 359 * InBuffer - Pointer to a buffer containing the 360 * resources to be set for the device 361 * 362 * RETURN: Status 363 * 364 * DESCRIPTION: This function is called to get the event resources for a 365 * specific device. The caller must first acquire a handle for 366 * the desired device. The resource data is passed to the routine 367 * the buffer pointed to by the InBuffer variable. Uses the 368 * _AEI method. 369 * 370 ******************************************************************************/ 371 372 ACPI_STATUS 373 AcpiGetEventResources ( 374 ACPI_HANDLE DeviceHandle, 375 ACPI_BUFFER *RetBuffer) 376 { 377 ACPI_STATUS Status; 378 ACPI_NAMESPACE_NODE *Node; 379 380 381 ACPI_FUNCTION_TRACE (AcpiGetEventResources); 382 383 384 /* Validate parameters then dispatch to internal routine */ 385 386 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 387 if (ACPI_FAILURE (Status)) 388 { 389 return_ACPI_STATUS (Status); 390 } 391 392 Status = AcpiRsGetAeiMethodData (Node, RetBuffer); 393 return_ACPI_STATUS (Status); 394 } 395 396 ACPI_EXPORT_SYMBOL (AcpiGetEventResources) 397 398 399 /****************************************************************************** 400 * 401 * FUNCTION: AcpiResourceToAddress64 402 * 403 * PARAMETERS: Resource - Pointer to a resource 404 * Out - Pointer to the users's return buffer 405 * (a struct acpi_resource_address64) 406 * 407 * RETURN: Status 408 * 409 * DESCRIPTION: If the resource is an address16, address32, or address64, 410 * copy it to the address64 return buffer. This saves the 411 * caller from having to duplicate code for different-sized 412 * addresses. 413 * 414 ******************************************************************************/ 415 416 ACPI_STATUS 417 AcpiResourceToAddress64 ( 418 ACPI_RESOURCE *Resource, 419 ACPI_RESOURCE_ADDRESS64 *Out) 420 { 421 ACPI_RESOURCE_ADDRESS16 *Address16; 422 ACPI_RESOURCE_ADDRESS32 *Address32; 423 424 425 if (!Resource || !Out) 426 { 427 return (AE_BAD_PARAMETER); 428 } 429 430 /* Convert 16 or 32 address descriptor to 64 */ 431 432 switch (Resource->Type) 433 { 434 case ACPI_RESOURCE_TYPE_ADDRESS16: 435 436 Address16 = ACPI_CAST_PTR ( 437 ACPI_RESOURCE_ADDRESS16, &Resource->Data); 438 ACPI_COPY_ADDRESS (Out, Address16); 439 break; 440 441 case ACPI_RESOURCE_TYPE_ADDRESS32: 442 443 Address32 = ACPI_CAST_PTR ( 444 ACPI_RESOURCE_ADDRESS32, &Resource->Data); 445 ACPI_COPY_ADDRESS (Out, Address32); 446 break; 447 448 case ACPI_RESOURCE_TYPE_ADDRESS64: 449 450 /* Simple copy for 64 bit source */ 451 452 memcpy (Out, &Resource->Data, sizeof (ACPI_RESOURCE_ADDRESS64)); 453 break; 454 455 default: 456 457 return (AE_BAD_PARAMETER); 458 } 459 460 return (AE_OK); 461 } 462 463 ACPI_EXPORT_SYMBOL (AcpiResourceToAddress64) 464 465 466 /******************************************************************************* 467 * 468 * FUNCTION: AcpiGetVendorResource 469 * 470 * PARAMETERS: DeviceHandle - Handle for the parent device object 471 * Name - Method name for the parent resource 472 * (METHOD_NAME__CRS or METHOD_NAME__PRS) 473 * Uuid - Pointer to the UUID to be matched. 474 * includes both subtype and 16-byte UUID 475 * RetBuffer - Where the vendor resource is returned 476 * 477 * RETURN: Status 478 * 479 * DESCRIPTION: Walk a resource template for the specified device to find a 480 * vendor-defined resource that matches the supplied UUID and 481 * UUID subtype. Returns a ACPI_RESOURCE of type Vendor. 482 * 483 ******************************************************************************/ 484 485 ACPI_STATUS 486 AcpiGetVendorResource ( 487 ACPI_HANDLE DeviceHandle, 488 char *Name, 489 ACPI_VENDOR_UUID *Uuid, 490 ACPI_BUFFER *RetBuffer) 491 { 492 ACPI_VENDOR_WALK_INFO Info; 493 ACPI_STATUS Status; 494 495 496 /* Other parameters are validated by AcpiWalkResources */ 497 498 if (!Uuid || !RetBuffer) 499 { 500 return (AE_BAD_PARAMETER); 501 } 502 503 Info.Uuid = Uuid; 504 Info.Buffer = RetBuffer; 505 Info.Status = AE_NOT_EXIST; 506 507 /* Walk the _CRS or _PRS resource list for this device */ 508 509 Status = AcpiWalkResources ( 510 DeviceHandle, Name, AcpiRsMatchVendorResource, &Info); 511 if (ACPI_FAILURE (Status)) 512 { 513 return (Status); 514 } 515 516 return (Info.Status); 517 } 518 519 ACPI_EXPORT_SYMBOL (AcpiGetVendorResource) 520 521 522 /******************************************************************************* 523 * 524 * FUNCTION: AcpiRsMatchVendorResource 525 * 526 * PARAMETERS: ACPI_WALK_RESOURCE_CALLBACK 527 * 528 * RETURN: Status 529 * 530 * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID 531 * 532 ******************************************************************************/ 533 534 static ACPI_STATUS 535 AcpiRsMatchVendorResource ( 536 ACPI_RESOURCE *Resource, 537 void *Context) 538 { 539 ACPI_VENDOR_WALK_INFO *Info = Context; 540 ACPI_RESOURCE_VENDOR_TYPED *Vendor; 541 ACPI_BUFFER *Buffer; 542 ACPI_STATUS Status; 543 544 545 /* Ignore all descriptors except Vendor */ 546 547 if (Resource->Type != ACPI_RESOURCE_TYPE_VENDOR) 548 { 549 return (AE_OK); 550 } 551 552 Vendor = &Resource->Data.VendorTyped; 553 554 /* 555 * For a valid match, these conditions must hold: 556 * 557 * 1) Length of descriptor data must be at least as long as a UUID struct 558 * 2) The UUID subtypes must match 559 * 3) The UUID data must match 560 */ 561 if ((Vendor->ByteLength < (ACPI_UUID_LENGTH + 1)) || 562 (Vendor->UuidSubtype != Info->Uuid->Subtype) || 563 (memcmp (Vendor->Uuid, Info->Uuid->Data, ACPI_UUID_LENGTH))) 564 { 565 return (AE_OK); 566 } 567 568 /* Validate/Allocate/Clear caller buffer */ 569 570 Buffer = Info->Buffer; 571 Status = AcpiUtInitializeBuffer (Buffer, Resource->Length); 572 if (ACPI_FAILURE (Status)) 573 { 574 return (Status); 575 } 576 577 /* Found the correct resource, copy and return it */ 578 579 memcpy (Buffer->Pointer, Resource, Resource->Length); 580 Buffer->Length = Resource->Length; 581 582 /* Found the desired descriptor, terminate resource walk */ 583 584 Info->Status = AE_OK; 585 return (AE_CTRL_TERMINATE); 586 } 587 588 589 /******************************************************************************* 590 * 591 * FUNCTION: AcpiWalkResourceBuffer 592 * 593 * PARAMETERS: Buffer - Formatted buffer returned by one of the 594 * various Get*Resource functions 595 * UserFunction - Called for each resource 596 * Context - Passed to UserFunction 597 * 598 * RETURN: Status 599 * 600 * DESCRIPTION: Walks the input resource template. The UserFunction is called 601 * once for each resource in the list. 602 * 603 ******************************************************************************/ 604 605 ACPI_STATUS 606 AcpiWalkResourceBuffer ( 607 ACPI_BUFFER *Buffer, 608 ACPI_WALK_RESOURCE_CALLBACK UserFunction, 609 void *Context) 610 { 611 ACPI_STATUS Status = AE_OK; 612 ACPI_RESOURCE *Resource; 613 ACPI_RESOURCE *ResourceEnd; 614 615 616 ACPI_FUNCTION_TRACE (AcpiWalkResourceBuffer); 617 618 619 /* Parameter validation */ 620 621 if (!Buffer || !Buffer->Pointer || !UserFunction) 622 { 623 return_ACPI_STATUS (AE_BAD_PARAMETER); 624 } 625 626 /* Buffer contains the resource list and length */ 627 628 Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer->Pointer); 629 ResourceEnd = ACPI_ADD_PTR ( 630 ACPI_RESOURCE, Buffer->Pointer, Buffer->Length); 631 632 /* Walk the resource list until the EndTag is found (or buffer end) */ 633 634 while (Resource < ResourceEnd) 635 { 636 /* Sanity check the resource type */ 637 638 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 639 { 640 Status = AE_AML_INVALID_RESOURCE_TYPE; 641 break; 642 } 643 644 /* Sanity check the length. It must not be zero, or we loop forever */ 645 646 if (!Resource->Length) 647 { 648 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); 649 } 650 651 /* Invoke the user function, abort on any error returned */ 652 653 Status = UserFunction (Resource, Context); 654 if (ACPI_FAILURE (Status)) 655 { 656 if (Status == AE_CTRL_TERMINATE) 657 { 658 /* This is an OK termination by the user function */ 659 660 Status = AE_OK; 661 } 662 break; 663 } 664 665 /* EndTag indicates end-of-list */ 666 667 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) 668 { 669 break; 670 } 671 672 /* Get the next resource descriptor */ 673 674 Resource = ACPI_NEXT_RESOURCE (Resource); 675 } 676 677 return_ACPI_STATUS (Status); 678 } 679 680 ACPI_EXPORT_SYMBOL (AcpiWalkResourceBuffer) 681 682 683 /******************************************************************************* 684 * 685 * FUNCTION: AcpiWalkResources 686 * 687 * PARAMETERS: DeviceHandle - Handle to the device object for the 688 * device we are querying 689 * Name - Method name of the resources we want. 690 * (METHOD_NAME__CRS, METHOD_NAME__PRS, or 691 * METHOD_NAME__AEI) 692 * UserFunction - Called for each resource 693 * Context - Passed to UserFunction 694 * 695 * RETURN: Status 696 * 697 * DESCRIPTION: Retrieves the current or possible resource list for the 698 * specified device. The UserFunction is called once for 699 * each resource in the list. 700 * 701 ******************************************************************************/ 702 703 ACPI_STATUS 704 AcpiWalkResources ( 705 ACPI_HANDLE DeviceHandle, 706 char *Name, 707 ACPI_WALK_RESOURCE_CALLBACK UserFunction, 708 void *Context) 709 { 710 ACPI_STATUS Status; 711 ACPI_BUFFER Buffer; 712 713 714 ACPI_FUNCTION_TRACE (AcpiWalkResources); 715 716 717 /* Parameter validation */ 718 719 if (!DeviceHandle || !UserFunction || !Name || 720 (!ACPI_COMPARE_NAME (Name, METHOD_NAME__CRS) && 721 !ACPI_COMPARE_NAME (Name, METHOD_NAME__PRS) && 722 !ACPI_COMPARE_NAME (Name, METHOD_NAME__AEI))) 723 { 724 return_ACPI_STATUS (AE_BAD_PARAMETER); 725 } 726 727 /* Get the _CRS/_PRS/_AEI resource list */ 728 729 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 730 Status = AcpiRsGetMethodData (DeviceHandle, Name, &Buffer); 731 if (ACPI_FAILURE (Status)) 732 { 733 return_ACPI_STATUS (Status); 734 } 735 736 /* Walk the resource list and cleanup */ 737 738 Status = AcpiWalkResourceBuffer (&Buffer, UserFunction, Context); 739 ACPI_FREE (Buffer.Pointer); 740 return_ACPI_STATUS (Status); 741 } 742 743 ACPI_EXPORT_SYMBOL (AcpiWalkResources) 744