1 /******************************************************************************* 2 * 3 * Module Name: rsxface - Public interfaces to the resource manager 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #define EXPORT_ACPI_INTERFACES 153 154 #include "acpi.h" 155 #include "accommon.h" 156 #include "acresrc.h" 157 #include "acnamesp.h" 158 159 #define _COMPONENT ACPI_RESOURCES 160 ACPI_MODULE_NAME ("rsxface") 161 162 /* Local macros for 16,32-bit to 64-bit conversion */ 163 164 #define ACPI_COPY_FIELD(Out, In, Field) ((Out)->Field = (In)->Field) 165 #define ACPI_COPY_ADDRESS(Out, In) \ 166 ACPI_COPY_FIELD(Out, In, ResourceType); \ 167 ACPI_COPY_FIELD(Out, In, ProducerConsumer); \ 168 ACPI_COPY_FIELD(Out, In, Decode); \ 169 ACPI_COPY_FIELD(Out, In, MinAddressFixed); \ 170 ACPI_COPY_FIELD(Out, In, MaxAddressFixed); \ 171 ACPI_COPY_FIELD(Out, In, Info); \ 172 ACPI_COPY_FIELD(Out, In, Address.Granularity); \ 173 ACPI_COPY_FIELD(Out, In, Address.Minimum); \ 174 ACPI_COPY_FIELD(Out, In, Address.Maximum); \ 175 ACPI_COPY_FIELD(Out, In, Address.TranslationOffset); \ 176 ACPI_COPY_FIELD(Out, In, Address.AddressLength); \ 177 ACPI_COPY_FIELD(Out, In, ResourceSource); 178 179 180 /* Local prototypes */ 181 182 static ACPI_STATUS 183 AcpiRsMatchVendorResource ( 184 ACPI_RESOURCE *Resource, 185 void *Context); 186 187 static ACPI_STATUS 188 AcpiRsValidateParameters ( 189 ACPI_HANDLE DeviceHandle, 190 ACPI_BUFFER *Buffer, 191 ACPI_NAMESPACE_NODE **ReturnNode); 192 193 194 /******************************************************************************* 195 * 196 * FUNCTION: AcpiRsValidateParameters 197 * 198 * PARAMETERS: DeviceHandle - Handle to a device 199 * Buffer - Pointer to a data buffer 200 * ReturnNode - Pointer to where the device node is returned 201 * 202 * RETURN: Status 203 * 204 * DESCRIPTION: Common parameter validation for resource interfaces 205 * 206 ******************************************************************************/ 207 208 static ACPI_STATUS 209 AcpiRsValidateParameters ( 210 ACPI_HANDLE DeviceHandle, 211 ACPI_BUFFER *Buffer, 212 ACPI_NAMESPACE_NODE **ReturnNode) 213 { 214 ACPI_STATUS Status; 215 ACPI_NAMESPACE_NODE *Node; 216 217 218 ACPI_FUNCTION_TRACE (RsValidateParameters); 219 220 221 /* 222 * Must have a valid handle to an ACPI device 223 */ 224 if (!DeviceHandle) 225 { 226 return_ACPI_STATUS (AE_BAD_PARAMETER); 227 } 228 229 Node = AcpiNsValidateHandle (DeviceHandle); 230 if (!Node) 231 { 232 return_ACPI_STATUS (AE_BAD_PARAMETER); 233 } 234 235 if (Node->Type != ACPI_TYPE_DEVICE) 236 { 237 return_ACPI_STATUS (AE_TYPE); 238 } 239 240 /* 241 * Validate the user buffer object 242 * 243 * if there is a non-zero buffer length we also need a valid pointer in 244 * the buffer. If it's a zero buffer length, we'll be returning the 245 * needed buffer size (later), so keep going. 246 */ 247 Status = AcpiUtValidateBuffer (Buffer); 248 if (ACPI_FAILURE (Status)) 249 { 250 return_ACPI_STATUS (Status); 251 } 252 253 *ReturnNode = Node; 254 return_ACPI_STATUS (AE_OK); 255 } 256 257 258 /******************************************************************************* 259 * 260 * FUNCTION: AcpiGetIrqRoutingTable 261 * 262 * PARAMETERS: DeviceHandle - Handle to the Bus device we are querying 263 * RetBuffer - Pointer to a buffer to receive the 264 * current resources for the device 265 * 266 * RETURN: Status 267 * 268 * DESCRIPTION: This function is called to get the IRQ routing table for a 269 * specific bus. The caller must first acquire a handle for the 270 * desired bus. The routine table is placed in the buffer pointed 271 * to by the RetBuffer variable parameter. 272 * 273 * If the function fails an appropriate status will be returned 274 * and the value of RetBuffer is undefined. 275 * 276 * This function attempts to execute the _PRT method contained in 277 * the object indicated by the passed DeviceHandle. 278 * 279 ******************************************************************************/ 280 281 ACPI_STATUS 282 AcpiGetIrqRoutingTable ( 283 ACPI_HANDLE DeviceHandle, 284 ACPI_BUFFER *RetBuffer) 285 { 286 ACPI_STATUS Status; 287 ACPI_NAMESPACE_NODE *Node; 288 289 290 ACPI_FUNCTION_TRACE (AcpiGetIrqRoutingTable); 291 292 293 /* Validate parameters then dispatch to internal routine */ 294 295 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 296 if (ACPI_FAILURE (Status)) 297 { 298 return_ACPI_STATUS (Status); 299 } 300 301 Status = AcpiRsGetPrtMethodData (Node, RetBuffer); 302 return_ACPI_STATUS (Status); 303 } 304 305 ACPI_EXPORT_SYMBOL (AcpiGetIrqRoutingTable) 306 307 308 /******************************************************************************* 309 * 310 * FUNCTION: AcpiGetCurrentResources 311 * 312 * PARAMETERS: DeviceHandle - Handle to the device object for the 313 * device we are querying 314 * RetBuffer - Pointer to a buffer to receive the 315 * current resources for the device 316 * 317 * RETURN: Status 318 * 319 * DESCRIPTION: This function is called to get the current resources for a 320 * specific device. The caller must first acquire a handle for 321 * the desired device. The resource data is placed in the buffer 322 * pointed to by the RetBuffer variable parameter. 323 * 324 * If the function fails an appropriate status will be returned 325 * and the value of RetBuffer is undefined. 326 * 327 * This function attempts to execute the _CRS method contained in 328 * the object indicated by the passed DeviceHandle. 329 * 330 ******************************************************************************/ 331 332 ACPI_STATUS 333 AcpiGetCurrentResources ( 334 ACPI_HANDLE DeviceHandle, 335 ACPI_BUFFER *RetBuffer) 336 { 337 ACPI_STATUS Status; 338 ACPI_NAMESPACE_NODE *Node; 339 340 341 ACPI_FUNCTION_TRACE (AcpiGetCurrentResources); 342 343 344 /* Validate parameters then dispatch to internal routine */ 345 346 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 347 if (ACPI_FAILURE (Status)) 348 { 349 return_ACPI_STATUS (Status); 350 } 351 352 Status = AcpiRsGetCrsMethodData (Node, RetBuffer); 353 return_ACPI_STATUS (Status); 354 } 355 356 ACPI_EXPORT_SYMBOL (AcpiGetCurrentResources) 357 358 359 /******************************************************************************* 360 * 361 * FUNCTION: AcpiGetPossibleResources 362 * 363 * PARAMETERS: DeviceHandle - Handle to the device object for the 364 * device we are querying 365 * RetBuffer - Pointer to a buffer to receive the 366 * resources for the device 367 * 368 * RETURN: Status 369 * 370 * DESCRIPTION: This function is called to get a list of the possible resources 371 * for a specific device. The caller must first acquire a handle 372 * for the desired device. The resource data is placed in the 373 * buffer pointed to by the RetBuffer variable. 374 * 375 * If the function fails an appropriate status will be returned 376 * and the value of RetBuffer is undefined. 377 * 378 ******************************************************************************/ 379 380 ACPI_STATUS 381 AcpiGetPossibleResources ( 382 ACPI_HANDLE DeviceHandle, 383 ACPI_BUFFER *RetBuffer) 384 { 385 ACPI_STATUS Status; 386 ACPI_NAMESPACE_NODE *Node; 387 388 389 ACPI_FUNCTION_TRACE (AcpiGetPossibleResources); 390 391 392 /* Validate parameters then dispatch to internal routine */ 393 394 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 395 if (ACPI_FAILURE (Status)) 396 { 397 return_ACPI_STATUS (Status); 398 } 399 400 Status = AcpiRsGetPrsMethodData (Node, RetBuffer); 401 return_ACPI_STATUS (Status); 402 } 403 404 ACPI_EXPORT_SYMBOL (AcpiGetPossibleResources) 405 406 407 /******************************************************************************* 408 * 409 * FUNCTION: AcpiSetCurrentResources 410 * 411 * PARAMETERS: DeviceHandle - Handle to the device object for the 412 * device we are setting resources 413 * InBuffer - Pointer to a buffer containing the 414 * resources to be set for the device 415 * 416 * RETURN: Status 417 * 418 * DESCRIPTION: This function is called to set the current resources for a 419 * specific device. The caller must first acquire a handle for 420 * the desired device. The resource data is passed to the routine 421 * the buffer pointed to by the InBuffer variable. 422 * 423 ******************************************************************************/ 424 425 ACPI_STATUS 426 AcpiSetCurrentResources ( 427 ACPI_HANDLE DeviceHandle, 428 ACPI_BUFFER *InBuffer) 429 { 430 ACPI_STATUS Status; 431 ACPI_NAMESPACE_NODE *Node; 432 433 434 ACPI_FUNCTION_TRACE (AcpiSetCurrentResources); 435 436 437 /* Validate the buffer, don't allow zero length */ 438 439 if ((!InBuffer) || 440 (!InBuffer->Pointer) || 441 (!InBuffer->Length)) 442 { 443 return_ACPI_STATUS (AE_BAD_PARAMETER); 444 } 445 446 /* Validate parameters then dispatch to internal routine */ 447 448 Status = AcpiRsValidateParameters (DeviceHandle, InBuffer, &Node); 449 if (ACPI_FAILURE (Status)) 450 { 451 return_ACPI_STATUS (Status); 452 } 453 454 Status = AcpiRsSetSrsMethodData (Node, InBuffer); 455 return_ACPI_STATUS (Status); 456 } 457 458 ACPI_EXPORT_SYMBOL (AcpiSetCurrentResources) 459 460 461 /******************************************************************************* 462 * 463 * FUNCTION: AcpiGetEventResources 464 * 465 * PARAMETERS: DeviceHandle - Handle to the device object for the 466 * device we are getting resources 467 * InBuffer - Pointer to a buffer containing the 468 * resources to be set for the device 469 * 470 * RETURN: Status 471 * 472 * DESCRIPTION: This function is called to get the event resources for a 473 * specific device. The caller must first acquire a handle for 474 * the desired device. The resource data is passed to the routine 475 * the buffer pointed to by the InBuffer variable. Uses the 476 * _AEI method. 477 * 478 ******************************************************************************/ 479 480 ACPI_STATUS 481 AcpiGetEventResources ( 482 ACPI_HANDLE DeviceHandle, 483 ACPI_BUFFER *RetBuffer) 484 { 485 ACPI_STATUS Status; 486 ACPI_NAMESPACE_NODE *Node; 487 488 489 ACPI_FUNCTION_TRACE (AcpiGetEventResources); 490 491 492 /* Validate parameters then dispatch to internal routine */ 493 494 Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); 495 if (ACPI_FAILURE (Status)) 496 { 497 return_ACPI_STATUS (Status); 498 } 499 500 Status = AcpiRsGetAeiMethodData (Node, RetBuffer); 501 return_ACPI_STATUS (Status); 502 } 503 504 ACPI_EXPORT_SYMBOL (AcpiGetEventResources) 505 506 507 /****************************************************************************** 508 * 509 * FUNCTION: AcpiResourceToAddress64 510 * 511 * PARAMETERS: Resource - Pointer to a resource 512 * Out - Pointer to the users's return buffer 513 * (a struct acpi_resource_address64) 514 * 515 * RETURN: Status 516 * 517 * DESCRIPTION: If the resource is an address16, address32, or address64, 518 * copy it to the address64 return buffer. This saves the 519 * caller from having to duplicate code for different-sized 520 * addresses. 521 * 522 ******************************************************************************/ 523 524 ACPI_STATUS 525 AcpiResourceToAddress64 ( 526 ACPI_RESOURCE *Resource, 527 ACPI_RESOURCE_ADDRESS64 *Out) 528 { 529 ACPI_RESOURCE_ADDRESS16 *Address16; 530 ACPI_RESOURCE_ADDRESS32 *Address32; 531 532 533 if (!Resource || !Out) 534 { 535 return (AE_BAD_PARAMETER); 536 } 537 538 /* Convert 16 or 32 address descriptor to 64 */ 539 540 switch (Resource->Type) 541 { 542 case ACPI_RESOURCE_TYPE_ADDRESS16: 543 544 Address16 = ACPI_CAST_PTR ( 545 ACPI_RESOURCE_ADDRESS16, &Resource->Data); 546 ACPI_COPY_ADDRESS (Out, Address16); 547 break; 548 549 case ACPI_RESOURCE_TYPE_ADDRESS32: 550 551 Address32 = ACPI_CAST_PTR ( 552 ACPI_RESOURCE_ADDRESS32, &Resource->Data); 553 ACPI_COPY_ADDRESS (Out, Address32); 554 break; 555 556 case ACPI_RESOURCE_TYPE_ADDRESS64: 557 558 /* Simple copy for 64 bit source */ 559 560 memcpy (Out, &Resource->Data, sizeof (ACPI_RESOURCE_ADDRESS64)); 561 break; 562 563 default: 564 565 return (AE_BAD_PARAMETER); 566 } 567 568 return (AE_OK); 569 } 570 571 ACPI_EXPORT_SYMBOL (AcpiResourceToAddress64) 572 573 574 /******************************************************************************* 575 * 576 * FUNCTION: AcpiGetVendorResource 577 * 578 * PARAMETERS: DeviceHandle - Handle for the parent device object 579 * Name - Method name for the parent resource 580 * (METHOD_NAME__CRS or METHOD_NAME__PRS) 581 * Uuid - Pointer to the UUID to be matched. 582 * includes both subtype and 16-byte UUID 583 * RetBuffer - Where the vendor resource is returned 584 * 585 * RETURN: Status 586 * 587 * DESCRIPTION: Walk a resource template for the specified device to find a 588 * vendor-defined resource that matches the supplied UUID and 589 * UUID subtype. Returns a ACPI_RESOURCE of type Vendor. 590 * 591 ******************************************************************************/ 592 593 ACPI_STATUS 594 AcpiGetVendorResource ( 595 ACPI_HANDLE DeviceHandle, 596 char *Name, 597 ACPI_VENDOR_UUID *Uuid, 598 ACPI_BUFFER *RetBuffer) 599 { 600 ACPI_VENDOR_WALK_INFO Info; 601 ACPI_STATUS Status; 602 603 604 /* Other parameters are validated by AcpiWalkResources */ 605 606 if (!Uuid || !RetBuffer) 607 { 608 return (AE_BAD_PARAMETER); 609 } 610 611 Info.Uuid = Uuid; 612 Info.Buffer = RetBuffer; 613 Info.Status = AE_NOT_EXIST; 614 615 /* Walk the _CRS or _PRS resource list for this device */ 616 617 Status = AcpiWalkResources ( 618 DeviceHandle, Name, AcpiRsMatchVendorResource, &Info); 619 if (ACPI_FAILURE (Status)) 620 { 621 return (Status); 622 } 623 624 return (Info.Status); 625 } 626 627 ACPI_EXPORT_SYMBOL (AcpiGetVendorResource) 628 629 630 /******************************************************************************* 631 * 632 * FUNCTION: AcpiRsMatchVendorResource 633 * 634 * PARAMETERS: ACPI_WALK_RESOURCE_CALLBACK 635 * 636 * RETURN: Status 637 * 638 * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID 639 * 640 ******************************************************************************/ 641 642 static ACPI_STATUS 643 AcpiRsMatchVendorResource ( 644 ACPI_RESOURCE *Resource, 645 void *Context) 646 { 647 ACPI_VENDOR_WALK_INFO *Info = Context; 648 ACPI_RESOURCE_VENDOR_TYPED *Vendor; 649 ACPI_BUFFER *Buffer; 650 ACPI_STATUS Status; 651 652 653 /* Ignore all descriptors except Vendor */ 654 655 if (Resource->Type != ACPI_RESOURCE_TYPE_VENDOR) 656 { 657 return (AE_OK); 658 } 659 660 Vendor = &Resource->Data.VendorTyped; 661 662 /* 663 * For a valid match, these conditions must hold: 664 * 665 * 1) Length of descriptor data must be at least as long as a UUID struct 666 * 2) The UUID subtypes must match 667 * 3) The UUID data must match 668 */ 669 if ((Vendor->ByteLength < (ACPI_UUID_LENGTH + 1)) || 670 (Vendor->UuidSubtype != Info->Uuid->Subtype) || 671 (memcmp (Vendor->Uuid, Info->Uuid->Data, ACPI_UUID_LENGTH))) 672 { 673 return (AE_OK); 674 } 675 676 /* Validate/Allocate/Clear caller buffer */ 677 678 Buffer = Info->Buffer; 679 Status = AcpiUtInitializeBuffer (Buffer, Resource->Length); 680 if (ACPI_FAILURE (Status)) 681 { 682 return (Status); 683 } 684 685 /* Found the correct resource, copy and return it */ 686 687 memcpy (Buffer->Pointer, Resource, Resource->Length); 688 Buffer->Length = Resource->Length; 689 690 /* Found the desired descriptor, terminate resource walk */ 691 692 Info->Status = AE_OK; 693 return (AE_CTRL_TERMINATE); 694 } 695 696 697 /******************************************************************************* 698 * 699 * FUNCTION: AcpiWalkResourceBuffer 700 * 701 * PARAMETERS: Buffer - Formatted buffer returned by one of the 702 * various Get*Resource functions 703 * UserFunction - Called for each resource 704 * Context - Passed to UserFunction 705 * 706 * RETURN: Status 707 * 708 * DESCRIPTION: Walks the input resource template. The UserFunction is called 709 * once for each resource in the list. 710 * 711 ******************************************************************************/ 712 713 ACPI_STATUS 714 AcpiWalkResourceBuffer ( 715 ACPI_BUFFER *Buffer, 716 ACPI_WALK_RESOURCE_CALLBACK UserFunction, 717 void *Context) 718 { 719 ACPI_STATUS Status = AE_OK; 720 ACPI_RESOURCE *Resource; 721 ACPI_RESOURCE *ResourceEnd; 722 723 724 ACPI_FUNCTION_TRACE (AcpiWalkResourceBuffer); 725 726 727 /* Parameter validation */ 728 729 if (!Buffer || !Buffer->Pointer || !UserFunction) 730 { 731 return_ACPI_STATUS (AE_BAD_PARAMETER); 732 } 733 734 /* Buffer contains the resource list and length */ 735 736 Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer->Pointer); 737 ResourceEnd = ACPI_ADD_PTR ( 738 ACPI_RESOURCE, Buffer->Pointer, Buffer->Length); 739 740 /* Walk the resource list until the EndTag is found (or buffer end) */ 741 742 while (Resource < ResourceEnd) 743 { 744 /* Sanity check the resource type */ 745 746 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 747 { 748 Status = AE_AML_INVALID_RESOURCE_TYPE; 749 break; 750 } 751 752 /* Sanity check the length. It must not be zero, or we loop forever */ 753 754 if (!Resource->Length) 755 { 756 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); 757 } 758 759 /* Invoke the user function, abort on any error returned */ 760 761 Status = UserFunction (Resource, Context); 762 if (ACPI_FAILURE (Status)) 763 { 764 if (Status == AE_CTRL_TERMINATE) 765 { 766 /* This is an OK termination by the user function */ 767 768 Status = AE_OK; 769 } 770 break; 771 } 772 773 /* EndTag indicates end-of-list */ 774 775 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) 776 { 777 break; 778 } 779 780 /* Get the next resource descriptor */ 781 782 Resource = ACPI_NEXT_RESOURCE (Resource); 783 } 784 785 return_ACPI_STATUS (Status); 786 } 787 788 ACPI_EXPORT_SYMBOL (AcpiWalkResourceBuffer) 789 790 791 /******************************************************************************* 792 * 793 * FUNCTION: AcpiWalkResources 794 * 795 * PARAMETERS: DeviceHandle - Handle to the device object for the 796 * device we are querying 797 * Name - Method name of the resources we want. 798 * (METHOD_NAME__CRS, METHOD_NAME__PRS, or 799 * METHOD_NAME__AEI or METHOD_NAME__DMA) 800 * UserFunction - Called for each resource 801 * Context - Passed to UserFunction 802 * 803 * RETURN: Status 804 * 805 * DESCRIPTION: Retrieves the current or possible resource list for the 806 * specified device. The UserFunction is called once for 807 * each resource in the list. 808 * 809 ******************************************************************************/ 810 811 ACPI_STATUS 812 AcpiWalkResources ( 813 ACPI_HANDLE DeviceHandle, 814 char *Name, 815 ACPI_WALK_RESOURCE_CALLBACK UserFunction, 816 void *Context) 817 { 818 ACPI_STATUS Status; 819 ACPI_BUFFER Buffer; 820 821 822 ACPI_FUNCTION_TRACE (AcpiWalkResources); 823 824 825 /* Parameter validation */ 826 827 if (!DeviceHandle || !UserFunction || !Name || 828 (!ACPI_COMPARE_NAME (Name, METHOD_NAME__CRS) && 829 !ACPI_COMPARE_NAME (Name, METHOD_NAME__PRS) && 830 !ACPI_COMPARE_NAME (Name, METHOD_NAME__AEI) && 831 !ACPI_COMPARE_NAME (Name, METHOD_NAME__DMA))) 832 { 833 return_ACPI_STATUS (AE_BAD_PARAMETER); 834 } 835 836 /* Get the _CRS/_PRS/_AEI/_DMA resource list */ 837 838 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 839 Status = AcpiRsGetMethodData (DeviceHandle, Name, &Buffer); 840 if (ACPI_FAILURE (Status)) 841 { 842 return_ACPI_STATUS (Status); 843 } 844 845 /* Walk the resource list and cleanup */ 846 847 Status = AcpiWalkResourceBuffer (&Buffer, UserFunction, Context); 848 ACPI_FREE (Buffer.Pointer); 849 return_ACPI_STATUS (Status); 850 } 851 852 ACPI_EXPORT_SYMBOL (AcpiWalkResources) 853