1 /******************************************************************************* 2 * 3 * Module Name: rsutils - Utilities for 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 #include "acpi.h" 45 #include "accommon.h" 46 #include "acnamesp.h" 47 #include "acresrc.h" 48 49 50 #define _COMPONENT ACPI_RESOURCES 51 ACPI_MODULE_NAME ("rsutils") 52 53 54 /******************************************************************************* 55 * 56 * FUNCTION: AcpiRsDecodeBitmask 57 * 58 * PARAMETERS: Mask - Bitmask to decode 59 * List - Where the converted list is returned 60 * 61 * RETURN: Count of bits set (length of list) 62 * 63 * DESCRIPTION: Convert a bit mask into a list of values 64 * 65 ******************************************************************************/ 66 67 UINT8 68 AcpiRsDecodeBitmask ( 69 UINT16 Mask, 70 UINT8 *List) 71 { 72 UINT8 i; 73 UINT8 BitCount; 74 75 76 ACPI_FUNCTION_ENTRY (); 77 78 79 /* Decode the mask bits */ 80 81 for (i = 0, BitCount = 0; Mask; i++) 82 { 83 if (Mask & 0x0001) 84 { 85 List[BitCount] = i; 86 BitCount++; 87 } 88 89 Mask >>= 1; 90 } 91 92 return (BitCount); 93 } 94 95 96 /******************************************************************************* 97 * 98 * FUNCTION: AcpiRsEncodeBitmask 99 * 100 * PARAMETERS: List - List of values to encode 101 * Count - Length of list 102 * 103 * RETURN: Encoded bitmask 104 * 105 * DESCRIPTION: Convert a list of values to an encoded bitmask 106 * 107 ******************************************************************************/ 108 109 UINT16 110 AcpiRsEncodeBitmask ( 111 UINT8 *List, 112 UINT8 Count) 113 { 114 UINT32 i; 115 UINT16 Mask; 116 117 118 ACPI_FUNCTION_ENTRY (); 119 120 121 /* Encode the list into a single bitmask */ 122 123 for (i = 0, Mask = 0; i < Count; i++) 124 { 125 Mask |= (0x1 << List[i]); 126 } 127 128 return (Mask); 129 } 130 131 132 /******************************************************************************* 133 * 134 * FUNCTION: AcpiRsMoveData 135 * 136 * PARAMETERS: Destination - Pointer to the destination descriptor 137 * Source - Pointer to the source descriptor 138 * ItemCount - How many items to move 139 * MoveType - Byte width 140 * 141 * RETURN: None 142 * 143 * DESCRIPTION: Move multiple data items from one descriptor to another. Handles 144 * alignment issues and endian issues if necessary, as configured 145 * via the ACPI_MOVE_* macros. (This is why a memcpy is not used) 146 * 147 ******************************************************************************/ 148 149 void 150 AcpiRsMoveData ( 151 void *Destination, 152 void *Source, 153 UINT16 ItemCount, 154 UINT8 MoveType) 155 { 156 UINT32 i; 157 158 159 ACPI_FUNCTION_ENTRY (); 160 161 162 /* One move per item */ 163 164 for (i = 0; i < ItemCount; i++) 165 { 166 switch (MoveType) 167 { 168 /* 169 * For the 8-bit case, we can perform the move all at once 170 * since there are no alignment or endian issues 171 */ 172 case ACPI_RSC_MOVE8: 173 case ACPI_RSC_MOVE_GPIO_RES: 174 case ACPI_RSC_MOVE_SERIAL_VEN: 175 case ACPI_RSC_MOVE_SERIAL_RES: 176 177 memcpy (Destination, Source, ItemCount); 178 return; 179 180 /* 181 * 16-, 32-, and 64-bit cases must use the move macros that perform 182 * endian conversion and/or accommodate hardware that cannot perform 183 * misaligned memory transfers 184 */ 185 case ACPI_RSC_MOVE16: 186 case ACPI_RSC_MOVE_GPIO_PIN: 187 188 ACPI_MOVE_16_TO_16 ( 189 &ACPI_CAST_PTR (UINT16, Destination)[i], 190 &ACPI_CAST_PTR (UINT16, Source)[i]); 191 break; 192 193 case ACPI_RSC_MOVE32: 194 195 ACPI_MOVE_32_TO_32 ( 196 &ACPI_CAST_PTR (UINT32, Destination)[i], 197 &ACPI_CAST_PTR (UINT32, Source)[i]); 198 break; 199 200 case ACPI_RSC_MOVE64: 201 202 ACPI_MOVE_64_TO_64 ( 203 &ACPI_CAST_PTR (UINT64, Destination)[i], 204 &ACPI_CAST_PTR (UINT64, Source)[i]); 205 break; 206 207 default: 208 209 return; 210 } 211 } 212 } 213 214 215 /******************************************************************************* 216 * 217 * FUNCTION: AcpiRsSetResourceLength 218 * 219 * PARAMETERS: TotalLength - Length of the AML descriptor, including 220 * the header and length fields. 221 * Aml - Pointer to the raw AML descriptor 222 * 223 * RETURN: None 224 * 225 * DESCRIPTION: Set the ResourceLength field of an AML 226 * resource descriptor, both Large and Small descriptors are 227 * supported automatically. Note: Descriptor Type field must 228 * be valid. 229 * 230 ******************************************************************************/ 231 232 void 233 AcpiRsSetResourceLength ( 234 ACPI_RSDESC_SIZE TotalLength, 235 AML_RESOURCE *Aml) 236 { 237 ACPI_RS_LENGTH ResourceLength; 238 239 240 ACPI_FUNCTION_ENTRY (); 241 242 243 /* Length is the total descriptor length minus the header length */ 244 245 ResourceLength = (ACPI_RS_LENGTH) 246 (TotalLength - AcpiUtGetResourceHeaderLength (Aml)); 247 248 /* Length is stored differently for large and small descriptors */ 249 250 if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE) 251 { 252 /* Large descriptor -- bytes 1-2 contain the 16-bit length */ 253 254 ACPI_MOVE_16_TO_16 ( 255 &Aml->LargeHeader.ResourceLength, &ResourceLength); 256 } 257 else 258 { 259 /* 260 * Small descriptor -- bits 2:0 of byte 0 contain the length 261 * Clear any existing length, preserving descriptor type bits 262 */ 263 Aml->SmallHeader.DescriptorType = (UINT8) 264 ((Aml->SmallHeader.DescriptorType & 265 ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK) 266 | ResourceLength); 267 } 268 } 269 270 271 /******************************************************************************* 272 * 273 * FUNCTION: AcpiRsSetResourceHeader 274 * 275 * PARAMETERS: DescriptorType - Byte to be inserted as the type 276 * TotalLength - Length of the AML descriptor, including 277 * the header and length fields. 278 * Aml - Pointer to the raw AML descriptor 279 * 280 * RETURN: None 281 * 282 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML 283 * resource descriptor, both Large and Small descriptors are 284 * supported automatically 285 * 286 ******************************************************************************/ 287 288 void 289 AcpiRsSetResourceHeader ( 290 UINT8 DescriptorType, 291 ACPI_RSDESC_SIZE TotalLength, 292 AML_RESOURCE *Aml) 293 { 294 ACPI_FUNCTION_ENTRY (); 295 296 297 /* Set the Resource Type */ 298 299 Aml->SmallHeader.DescriptorType = DescriptorType; 300 301 /* Set the Resource Length */ 302 303 AcpiRsSetResourceLength (TotalLength, Aml); 304 } 305 306 307 /******************************************************************************* 308 * 309 * FUNCTION: AcpiRsStrcpy 310 * 311 * PARAMETERS: Destination - Pointer to the destination string 312 * Source - Pointer to the source string 313 * 314 * RETURN: String length, including NULL terminator 315 * 316 * DESCRIPTION: Local string copy that returns the string length, saving a 317 * strcpy followed by a strlen. 318 * 319 ******************************************************************************/ 320 321 static UINT16 322 AcpiRsStrcpy ( 323 char *Destination, 324 char *Source) 325 { 326 UINT16 i; 327 328 329 ACPI_FUNCTION_ENTRY (); 330 331 332 for (i = 0; Source[i]; i++) 333 { 334 Destination[i] = Source[i]; 335 } 336 337 Destination[i] = 0; 338 339 /* Return string length including the NULL terminator */ 340 341 return ((UINT16) (i + 1)); 342 } 343 344 345 /******************************************************************************* 346 * 347 * FUNCTION: AcpiRsGetResourceSource 348 * 349 * PARAMETERS: ResourceLength - Length field of the descriptor 350 * MinimumLength - Minimum length of the descriptor (minus 351 * any optional fields) 352 * ResourceSource - Where the ResourceSource is returned 353 * Aml - Pointer to the raw AML descriptor 354 * StringPtr - (optional) where to store the actual 355 * ResourceSource string 356 * 357 * RETURN: Length of the string plus NULL terminator, rounded up to native 358 * word boundary 359 * 360 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor 361 * to an internal resource descriptor 362 * 363 ******************************************************************************/ 364 365 ACPI_RS_LENGTH 366 AcpiRsGetResourceSource ( 367 ACPI_RS_LENGTH ResourceLength, 368 ACPI_RS_LENGTH MinimumLength, 369 ACPI_RESOURCE_SOURCE *ResourceSource, 370 AML_RESOURCE *Aml, 371 char *StringPtr) 372 { 373 ACPI_RSDESC_SIZE TotalLength; 374 UINT8 *AmlResourceSource; 375 376 377 ACPI_FUNCTION_ENTRY (); 378 379 380 TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER); 381 AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength); 382 383 /* 384 * ResourceSource is present if the length of the descriptor is longer 385 * than the minimum length. 386 * 387 * Note: Some resource descriptors will have an additional null, so 388 * we add 1 to the minimum length. 389 */ 390 if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1)) 391 { 392 /* Get the ResourceSourceIndex */ 393 394 ResourceSource->Index = AmlResourceSource[0]; 395 396 ResourceSource->StringPtr = StringPtr; 397 if (!StringPtr) 398 { 399 /* 400 * String destination pointer is not specified; Set the String 401 * pointer to the end of the current ResourceSource structure. 402 */ 403 ResourceSource->StringPtr = ACPI_ADD_PTR ( 404 char, ResourceSource, sizeof (ACPI_RESOURCE_SOURCE)); 405 } 406 407 /* 408 * In order for the Resource length to be a multiple of the native 409 * word, calculate the length of the string (+1 for NULL terminator) 410 * and expand to the next word multiple. 411 * 412 * Zero the entire area of the buffer. 413 */ 414 TotalLength = (UINT32) strlen ( 415 ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1; 416 417 TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength); 418 419 memset (ResourceSource->StringPtr, 0, TotalLength); 420 421 /* Copy the ResourceSource string to the destination */ 422 423 ResourceSource->StringLength = AcpiRsStrcpy ( 424 ResourceSource->StringPtr, 425 ACPI_CAST_PTR (char, &AmlResourceSource[1])); 426 427 return ((ACPI_RS_LENGTH) TotalLength); 428 } 429 430 /* ResourceSource is not present */ 431 432 ResourceSource->Index = 0; 433 ResourceSource->StringLength = 0; 434 ResourceSource->StringPtr = NULL; 435 return (0); 436 } 437 438 439 /******************************************************************************* 440 * 441 * FUNCTION: AcpiRsSetResourceSource 442 * 443 * PARAMETERS: Aml - Pointer to the raw AML descriptor 444 * MinimumLength - Minimum length of the descriptor (minus 445 * any optional fields) 446 * ResourceSource - Internal ResourceSource 447 448 * 449 * RETURN: Total length of the AML descriptor 450 * 451 * DESCRIPTION: Convert an optional ResourceSource from internal format to a 452 * raw AML resource descriptor 453 * 454 ******************************************************************************/ 455 456 ACPI_RSDESC_SIZE 457 AcpiRsSetResourceSource ( 458 AML_RESOURCE *Aml, 459 ACPI_RS_LENGTH MinimumLength, 460 ACPI_RESOURCE_SOURCE *ResourceSource) 461 { 462 UINT8 *AmlResourceSource; 463 ACPI_RSDESC_SIZE DescriptorLength; 464 465 466 ACPI_FUNCTION_ENTRY (); 467 468 469 DescriptorLength = MinimumLength; 470 471 /* Non-zero string length indicates presence of a ResourceSource */ 472 473 if (ResourceSource->StringLength) 474 { 475 /* Point to the end of the AML descriptor */ 476 477 AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength); 478 479 /* Copy the ResourceSourceIndex */ 480 481 AmlResourceSource[0] = (UINT8) ResourceSource->Index; 482 483 /* Copy the ResourceSource string */ 484 485 strcpy (ACPI_CAST_PTR (char, &AmlResourceSource[1]), 486 ResourceSource->StringPtr); 487 488 /* 489 * Add the length of the string (+ 1 for null terminator) to the 490 * final descriptor length 491 */ 492 DescriptorLength += ((ACPI_RSDESC_SIZE) 493 ResourceSource->StringLength + 1); 494 } 495 496 /* Return the new total length of the AML descriptor */ 497 498 return (DescriptorLength); 499 } 500 501 502 /******************************************************************************* 503 * 504 * FUNCTION: AcpiRsGetPrtMethodData 505 * 506 * PARAMETERS: Node - Device node 507 * RetBuffer - Pointer to a buffer structure for the 508 * results 509 * 510 * RETURN: Status 511 * 512 * DESCRIPTION: This function is called to get the _PRT value of an object 513 * contained in an object specified by the handle passed in 514 * 515 * If the function fails an appropriate status will be returned 516 * and the contents of the callers buffer is undefined. 517 * 518 ******************************************************************************/ 519 520 ACPI_STATUS 521 AcpiRsGetPrtMethodData ( 522 ACPI_NAMESPACE_NODE *Node, 523 ACPI_BUFFER *RetBuffer) 524 { 525 ACPI_OPERAND_OBJECT *ObjDesc; 526 ACPI_STATUS Status; 527 528 529 ACPI_FUNCTION_TRACE (RsGetPrtMethodData); 530 531 532 /* Parameters guaranteed valid by caller */ 533 534 /* Execute the method, no parameters */ 535 536 Status = AcpiUtEvaluateObject ( 537 Node, METHOD_NAME__PRT, ACPI_BTYPE_PACKAGE, &ObjDesc); 538 if (ACPI_FAILURE (Status)) 539 { 540 return_ACPI_STATUS (Status); 541 } 542 543 /* 544 * Create a resource linked list from the byte stream buffer that comes 545 * back from the _CRS method execution. 546 */ 547 Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer); 548 549 /* On exit, we must delete the object returned by EvaluateObject */ 550 551 AcpiUtRemoveReference (ObjDesc); 552 return_ACPI_STATUS (Status); 553 } 554 555 556 /******************************************************************************* 557 * 558 * FUNCTION: AcpiRsGetCrsMethodData 559 * 560 * PARAMETERS: Node - Device node 561 * RetBuffer - Pointer to a buffer structure for the 562 * results 563 * 564 * RETURN: Status 565 * 566 * DESCRIPTION: This function is called to get the _CRS value of an object 567 * contained in an object specified by the handle passed in 568 * 569 * If the function fails an appropriate status will be returned 570 * and the contents of the callers buffer is undefined. 571 * 572 ******************************************************************************/ 573 574 ACPI_STATUS 575 AcpiRsGetCrsMethodData ( 576 ACPI_NAMESPACE_NODE *Node, 577 ACPI_BUFFER *RetBuffer) 578 { 579 ACPI_OPERAND_OBJECT *ObjDesc; 580 ACPI_STATUS Status; 581 582 583 ACPI_FUNCTION_TRACE (RsGetCrsMethodData); 584 585 586 /* Parameters guaranteed valid by caller */ 587 588 /* Execute the method, no parameters */ 589 590 Status = AcpiUtEvaluateObject ( 591 Node, METHOD_NAME__CRS, ACPI_BTYPE_BUFFER, &ObjDesc); 592 if (ACPI_FAILURE (Status)) 593 { 594 return_ACPI_STATUS (Status); 595 } 596 597 /* 598 * Make the call to create a resource linked list from the 599 * byte stream buffer that comes back from the _CRS method 600 * execution. 601 */ 602 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer); 603 604 /* On exit, we must delete the object returned by evaluateObject */ 605 606 AcpiUtRemoveReference (ObjDesc); 607 return_ACPI_STATUS (Status); 608 } 609 610 611 /******************************************************************************* 612 * 613 * FUNCTION: AcpiRsGetPrsMethodData 614 * 615 * PARAMETERS: Node - Device node 616 * RetBuffer - Pointer to a buffer structure for the 617 * results 618 * 619 * RETURN: Status 620 * 621 * DESCRIPTION: This function is called to get the _PRS value of an object 622 * contained in an object specified by the handle passed in 623 * 624 * If the function fails an appropriate status will be returned 625 * and the contents of the callers buffer is undefined. 626 * 627 ******************************************************************************/ 628 629 ACPI_STATUS 630 AcpiRsGetPrsMethodData ( 631 ACPI_NAMESPACE_NODE *Node, 632 ACPI_BUFFER *RetBuffer) 633 { 634 ACPI_OPERAND_OBJECT *ObjDesc; 635 ACPI_STATUS Status; 636 637 638 ACPI_FUNCTION_TRACE (RsGetPrsMethodData); 639 640 641 /* Parameters guaranteed valid by caller */ 642 643 /* Execute the method, no parameters */ 644 645 Status = AcpiUtEvaluateObject ( 646 Node, METHOD_NAME__PRS, ACPI_BTYPE_BUFFER, &ObjDesc); 647 if (ACPI_FAILURE (Status)) 648 { 649 return_ACPI_STATUS (Status); 650 } 651 652 /* 653 * Make the call to create a resource linked list from the 654 * byte stream buffer that comes back from the _CRS method 655 * execution. 656 */ 657 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer); 658 659 /* On exit, we must delete the object returned by evaluateObject */ 660 661 AcpiUtRemoveReference (ObjDesc); 662 return_ACPI_STATUS (Status); 663 } 664 665 666 /******************************************************************************* 667 * 668 * FUNCTION: AcpiRsGetAeiMethodData 669 * 670 * PARAMETERS: Node - Device node 671 * RetBuffer - Pointer to a buffer structure for the 672 * results 673 * 674 * RETURN: Status 675 * 676 * DESCRIPTION: This function is called to get the _AEI value of an object 677 * contained in an object specified by the handle passed in 678 * 679 * If the function fails an appropriate status will be returned 680 * and the contents of the callers buffer is undefined. 681 * 682 ******************************************************************************/ 683 684 ACPI_STATUS 685 AcpiRsGetAeiMethodData ( 686 ACPI_NAMESPACE_NODE *Node, 687 ACPI_BUFFER *RetBuffer) 688 { 689 ACPI_OPERAND_OBJECT *ObjDesc; 690 ACPI_STATUS Status; 691 692 693 ACPI_FUNCTION_TRACE (RsGetAeiMethodData); 694 695 696 /* Parameters guaranteed valid by caller */ 697 698 /* Execute the method, no parameters */ 699 700 Status = AcpiUtEvaluateObject ( 701 Node, METHOD_NAME__AEI, ACPI_BTYPE_BUFFER, &ObjDesc); 702 if (ACPI_FAILURE (Status)) 703 { 704 return_ACPI_STATUS (Status); 705 } 706 707 /* 708 * Make the call to create a resource linked list from the 709 * byte stream buffer that comes back from the _CRS method 710 * execution. 711 */ 712 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer); 713 714 /* On exit, we must delete the object returned by evaluateObject */ 715 716 AcpiUtRemoveReference (ObjDesc); 717 return_ACPI_STATUS (Status); 718 } 719 720 721 /******************************************************************************* 722 * 723 * FUNCTION: AcpiRsGetMethodData 724 * 725 * PARAMETERS: Handle - Handle to the containing object 726 * Path - Path to method, relative to Handle 727 * RetBuffer - Pointer to a buffer structure for the 728 * results 729 * 730 * RETURN: Status 731 * 732 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an 733 * object contained in an object specified by the handle passed in 734 * 735 * If the function fails an appropriate status will be returned 736 * and the contents of the callers buffer is undefined. 737 * 738 ******************************************************************************/ 739 740 ACPI_STATUS 741 AcpiRsGetMethodData ( 742 ACPI_HANDLE Handle, 743 const char *Path, 744 ACPI_BUFFER *RetBuffer) 745 { 746 ACPI_OPERAND_OBJECT *ObjDesc; 747 ACPI_STATUS Status; 748 749 750 ACPI_FUNCTION_TRACE (RsGetMethodData); 751 752 753 /* Parameters guaranteed valid by caller */ 754 755 /* Execute the method, no parameters */ 756 757 Status = AcpiUtEvaluateObject ( 758 ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle), 759 Path, ACPI_BTYPE_BUFFER, &ObjDesc); 760 if (ACPI_FAILURE (Status)) 761 { 762 return_ACPI_STATUS (Status); 763 } 764 765 /* 766 * Make the call to create a resource linked list from the 767 * byte stream buffer that comes back from the method 768 * execution. 769 */ 770 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer); 771 772 /* On exit, we must delete the object returned by EvaluateObject */ 773 774 AcpiUtRemoveReference (ObjDesc); 775 return_ACPI_STATUS (Status); 776 } 777 778 779 /******************************************************************************* 780 * 781 * FUNCTION: AcpiRsSetSrsMethodData 782 * 783 * PARAMETERS: Node - Device node 784 * InBuffer - Pointer to a buffer structure of the 785 * parameter 786 * 787 * RETURN: Status 788 * 789 * DESCRIPTION: This function is called to set the _SRS of an object contained 790 * in an object specified by the handle passed in 791 * 792 * If the function fails an appropriate status will be returned 793 * and the contents of the callers buffer is undefined. 794 * 795 * Note: Parameters guaranteed valid by caller 796 * 797 ******************************************************************************/ 798 799 ACPI_STATUS 800 AcpiRsSetSrsMethodData ( 801 ACPI_NAMESPACE_NODE *Node, 802 ACPI_BUFFER *InBuffer) 803 { 804 ACPI_EVALUATE_INFO *Info; 805 ACPI_OPERAND_OBJECT *Args[2]; 806 ACPI_STATUS Status; 807 ACPI_BUFFER Buffer; 808 809 810 ACPI_FUNCTION_TRACE (RsSetSrsMethodData); 811 812 813 /* Allocate and initialize the evaluation information block */ 814 815 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 816 if (!Info) 817 { 818 return_ACPI_STATUS (AE_NO_MEMORY); 819 } 820 821 Info->PrefixNode = Node; 822 Info->RelativePathname = METHOD_NAME__SRS; 823 Info->Parameters = Args; 824 Info->Flags = ACPI_IGNORE_RETURN_VALUE; 825 826 /* 827 * The InBuffer parameter will point to a linked list of 828 * resource parameters. It needs to be formatted into a 829 * byte stream to be sent in as an input parameter to _SRS 830 * 831 * Convert the linked list into a byte stream 832 */ 833 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 834 Status = AcpiRsCreateAmlResources (InBuffer, &Buffer); 835 if (ACPI_FAILURE (Status)) 836 { 837 goto Cleanup; 838 } 839 840 /* Create and initialize the method parameter object */ 841 842 Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER); 843 if (!Args[0]) 844 { 845 /* 846 * Must free the buffer allocated above (otherwise it is freed 847 * later) 848 */ 849 ACPI_FREE (Buffer.Pointer); 850 Status = AE_NO_MEMORY; 851 goto Cleanup; 852 } 853 854 Args[0]->Buffer.Length = (UINT32) Buffer.Length; 855 Args[0]->Buffer.Pointer = Buffer.Pointer; 856 Args[0]->Common.Flags = AOPOBJ_DATA_VALID; 857 Args[1] = NULL; 858 859 /* Execute the method, no return value is expected */ 860 861 Status = AcpiNsEvaluate (Info); 862 863 /* Clean up and return the status from AcpiNsEvaluate */ 864 865 AcpiUtRemoveReference (Args[0]); 866 867 Cleanup: 868 ACPI_FREE (Info); 869 return_ACPI_STATUS (Status); 870 } 871