1 /*******************************************************************************
2  *
3  * Module Name: rsutils - Utilities for the resource manager
4  *
5  ******************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2019, 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 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acnamesp.h>
155 #include <contrib/dev/acpica/include/acresrc.h>
156 
157 
158 #define _COMPONENT          ACPI_RESOURCES
159         ACPI_MODULE_NAME    ("rsutils")
160 
161 
162 /*******************************************************************************
163  *
164  * FUNCTION:    AcpiRsDecodeBitmask
165  *
166  * PARAMETERS:  Mask            - Bitmask to decode
167  *              List            - Where the converted list is returned
168  *
169  * RETURN:      Count of bits set (length of list)
170  *
171  * DESCRIPTION: Convert a bit mask into a list of values
172  *
173  ******************************************************************************/
174 
175 UINT8
176 AcpiRsDecodeBitmask (
177     UINT16                  Mask,
178     UINT8                   *List)
179 {
180     UINT8                   i;
181     UINT8                   BitCount;
182 
183 
184     ACPI_FUNCTION_ENTRY ();
185 
186 
187     /* Decode the mask bits */
188 
189     for (i = 0, BitCount = 0; Mask; i++)
190     {
191         if (Mask & 0x0001)
192         {
193             List[BitCount] = i;
194             BitCount++;
195         }
196 
197         Mask >>= 1;
198     }
199 
200     return (BitCount);
201 }
202 
203 
204 /*******************************************************************************
205  *
206  * FUNCTION:    AcpiRsEncodeBitmask
207  *
208  * PARAMETERS:  List            - List of values to encode
209  *              Count           - Length of list
210  *
211  * RETURN:      Encoded bitmask
212  *
213  * DESCRIPTION: Convert a list of values to an encoded bitmask
214  *
215  ******************************************************************************/
216 
217 UINT16
218 AcpiRsEncodeBitmask (
219     UINT8                   *List,
220     UINT8                   Count)
221 {
222     UINT32                  i;
223     UINT16                  Mask;
224 
225 
226     ACPI_FUNCTION_ENTRY ();
227 
228 
229     /* Encode the list into a single bitmask */
230 
231     for (i = 0, Mask = 0; i < Count; i++)
232     {
233         Mask |= (0x1 << List[i]);
234     }
235 
236     return (Mask);
237 }
238 
239 
240 /*******************************************************************************
241  *
242  * FUNCTION:    AcpiRsMoveData
243  *
244  * PARAMETERS:  Destination         - Pointer to the destination descriptor
245  *              Source              - Pointer to the source descriptor
246  *              ItemCount           - How many items to move
247  *              MoveType            - Byte width
248  *
249  * RETURN:      None
250  *
251  * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
252  *              alignment issues and endian issues if necessary, as configured
253  *              via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
254  *
255  ******************************************************************************/
256 
257 void
258 AcpiRsMoveData (
259     void                    *Destination,
260     void                    *Source,
261     UINT16                  ItemCount,
262     UINT8                   MoveType)
263 {
264     UINT32                  i;
265 
266 
267     ACPI_FUNCTION_ENTRY ();
268 
269 
270     /* One move per item */
271 
272     for (i = 0; i < ItemCount; i++)
273     {
274         switch (MoveType)
275         {
276         /*
277          * For the 8-bit case, we can perform the move all at once
278          * since there are no alignment or endian issues
279          */
280         case ACPI_RSC_MOVE8:
281         case ACPI_RSC_MOVE_GPIO_RES:
282         case ACPI_RSC_MOVE_SERIAL_VEN:
283         case ACPI_RSC_MOVE_SERIAL_RES:
284 
285             memcpy (Destination, Source, ItemCount);
286             return;
287 
288         /*
289          * 16-, 32-, and 64-bit cases must use the move macros that perform
290          * endian conversion and/or accommodate hardware that cannot perform
291          * misaligned memory transfers
292          */
293         case ACPI_RSC_MOVE16:
294         case ACPI_RSC_MOVE_GPIO_PIN:
295 
296             ACPI_MOVE_16_TO_16 (
297                 &ACPI_CAST_PTR (UINT16, Destination)[i],
298                 &ACPI_CAST_PTR (UINT16, Source)[i]);
299             break;
300 
301         case ACPI_RSC_MOVE32:
302 
303             ACPI_MOVE_32_TO_32 (
304                 &ACPI_CAST_PTR (UINT32, Destination)[i],
305                 &ACPI_CAST_PTR (UINT32, Source)[i]);
306             break;
307 
308         case ACPI_RSC_MOVE64:
309 
310             ACPI_MOVE_64_TO_64 (
311                 &ACPI_CAST_PTR (UINT64, Destination)[i],
312                 &ACPI_CAST_PTR (UINT64, Source)[i]);
313             break;
314 
315         default:
316 
317             return;
318         }
319     }
320 }
321 
322 
323 /*******************************************************************************
324  *
325  * FUNCTION:    AcpiRsSetResourceLength
326  *
327  * PARAMETERS:  TotalLength         - Length of the AML descriptor, including
328  *                                    the header and length fields.
329  *              Aml                 - Pointer to the raw AML descriptor
330  *
331  * RETURN:      None
332  *
333  * DESCRIPTION: Set the ResourceLength field of an AML
334  *              resource descriptor, both Large and Small descriptors are
335  *              supported automatically. Note: Descriptor Type field must
336  *              be valid.
337  *
338  ******************************************************************************/
339 
340 void
341 AcpiRsSetResourceLength (
342     ACPI_RSDESC_SIZE        TotalLength,
343     AML_RESOURCE            *Aml)
344 {
345     ACPI_RS_LENGTH          ResourceLength;
346 
347 
348     ACPI_FUNCTION_ENTRY ();
349 
350 
351     /* Length is the total descriptor length minus the header length */
352 
353     ResourceLength = (ACPI_RS_LENGTH)
354         (TotalLength - AcpiUtGetResourceHeaderLength (Aml));
355 
356     /* Length is stored differently for large and small descriptors */
357 
358     if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
359     {
360         /* Large descriptor -- bytes 1-2 contain the 16-bit length */
361 
362         ACPI_MOVE_16_TO_16 (
363             &Aml->LargeHeader.ResourceLength, &ResourceLength);
364     }
365     else
366     {
367         /*
368          * Small descriptor -- bits 2:0 of byte 0 contain the length
369          * Clear any existing length, preserving descriptor type bits
370          */
371         Aml->SmallHeader.DescriptorType = (UINT8)
372             ((Aml->SmallHeader.DescriptorType &
373                 ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
374             | ResourceLength);
375     }
376 }
377 
378 
379 /*******************************************************************************
380  *
381  * FUNCTION:    AcpiRsSetResourceHeader
382  *
383  * PARAMETERS:  DescriptorType      - Byte to be inserted as the type
384  *              TotalLength         - Length of the AML descriptor, including
385  *                                    the header and length fields.
386  *              Aml                 - Pointer to the raw AML descriptor
387  *
388  * RETURN:      None
389  *
390  * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
391  *              resource descriptor, both Large and Small descriptors are
392  *              supported automatically
393  *
394  ******************************************************************************/
395 
396 void
397 AcpiRsSetResourceHeader (
398     UINT8                   DescriptorType,
399     ACPI_RSDESC_SIZE        TotalLength,
400     AML_RESOURCE            *Aml)
401 {
402     ACPI_FUNCTION_ENTRY ();
403 
404 
405     /* Set the Resource Type */
406 
407     Aml->SmallHeader.DescriptorType = DescriptorType;
408 
409     /* Set the Resource Length */
410 
411     AcpiRsSetResourceLength (TotalLength, Aml);
412 }
413 
414 
415 /*******************************************************************************
416  *
417  * FUNCTION:    AcpiRsStrcpy
418  *
419  * PARAMETERS:  Destination         - Pointer to the destination string
420  *              Source              - Pointer to the source string
421  *
422  * RETURN:      String length, including NULL terminator
423  *
424  * DESCRIPTION: Local string copy that returns the string length, saving a
425  *              strcpy followed by a strlen.
426  *
427  ******************************************************************************/
428 
429 static UINT16
430 AcpiRsStrcpy (
431     char                    *Destination,
432     char                    *Source)
433 {
434     UINT16                  i;
435 
436 
437     ACPI_FUNCTION_ENTRY ();
438 
439 
440     for (i = 0; Source[i]; i++)
441     {
442         Destination[i] = Source[i];
443     }
444 
445     Destination[i] = 0;
446 
447     /* Return string length including the NULL terminator */
448 
449     return ((UINT16) (i + 1));
450 }
451 
452 
453 /*******************************************************************************
454  *
455  * FUNCTION:    AcpiRsGetResourceSource
456  *
457  * PARAMETERS:  ResourceLength      - Length field of the descriptor
458  *              MinimumLength       - Minimum length of the descriptor (minus
459  *                                    any optional fields)
460  *              ResourceSource      - Where the ResourceSource is returned
461  *              Aml                 - Pointer to the raw AML descriptor
462  *              StringPtr           - (optional) where to store the actual
463  *                                    ResourceSource string
464  *
465  * RETURN:      Length of the string plus NULL terminator, rounded up to native
466  *              word boundary
467  *
468  * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
469  *              to an internal resource descriptor
470  *
471  ******************************************************************************/
472 
473 ACPI_RS_LENGTH
474 AcpiRsGetResourceSource (
475     ACPI_RS_LENGTH          ResourceLength,
476     ACPI_RS_LENGTH          MinimumLength,
477     ACPI_RESOURCE_SOURCE    *ResourceSource,
478     AML_RESOURCE            *Aml,
479     char                    *StringPtr)
480 {
481     ACPI_RSDESC_SIZE        TotalLength;
482     UINT8                   *AmlResourceSource;
483 
484 
485     ACPI_FUNCTION_ENTRY ();
486 
487 
488     TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
489     AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
490 
491     /*
492      * ResourceSource is present if the length of the descriptor is longer
493      * than the minimum length.
494      *
495      * Note: Some resource descriptors will have an additional null, so
496      * we add 1 to the minimum length.
497      */
498     if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
499     {
500         /* Get the ResourceSourceIndex */
501 
502         ResourceSource->Index = AmlResourceSource[0];
503 
504         ResourceSource->StringPtr = StringPtr;
505         if (!StringPtr)
506         {
507             /*
508              * String destination pointer is not specified; Set the String
509              * pointer to the end of the current ResourceSource structure.
510              */
511             ResourceSource->StringPtr = ACPI_ADD_PTR (
512                 char, ResourceSource, sizeof (ACPI_RESOURCE_SOURCE));
513         }
514 
515         /*
516          * In order for the Resource length to be a multiple of the native
517          * word, calculate the length of the string (+1 for NULL terminator)
518          * and expand to the next word multiple.
519          *
520          * Zero the entire area of the buffer.
521          */
522         TotalLength = (UINT32) strlen (
523             ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
524 
525         TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
526 
527         memset (ResourceSource->StringPtr, 0, TotalLength);
528 
529         /* Copy the ResourceSource string to the destination */
530 
531         ResourceSource->StringLength = AcpiRsStrcpy (
532             ResourceSource->StringPtr,
533             ACPI_CAST_PTR (char, &AmlResourceSource[1]));
534 
535         return ((ACPI_RS_LENGTH) TotalLength);
536     }
537 
538     /* ResourceSource is not present */
539 
540     ResourceSource->Index = 0;
541     ResourceSource->StringLength = 0;
542     ResourceSource->StringPtr = NULL;
543     return (0);
544 }
545 
546 
547 /*******************************************************************************
548  *
549  * FUNCTION:    AcpiRsSetResourceSource
550  *
551  * PARAMETERS:  Aml                 - Pointer to the raw AML descriptor
552  *              MinimumLength       - Minimum length of the descriptor (minus
553  *                                    any optional fields)
554  *              ResourceSource      - Internal ResourceSource
555 
556  *
557  * RETURN:      Total length of the AML descriptor
558  *
559  * DESCRIPTION: Convert an optional ResourceSource from internal format to a
560  *              raw AML resource descriptor
561  *
562  ******************************************************************************/
563 
564 ACPI_RSDESC_SIZE
565 AcpiRsSetResourceSource (
566     AML_RESOURCE            *Aml,
567     ACPI_RS_LENGTH          MinimumLength,
568     ACPI_RESOURCE_SOURCE    *ResourceSource)
569 {
570     UINT8                   *AmlResourceSource;
571     ACPI_RSDESC_SIZE        DescriptorLength;
572 
573 
574     ACPI_FUNCTION_ENTRY ();
575 
576 
577     DescriptorLength = MinimumLength;
578 
579     /* Non-zero string length indicates presence of a ResourceSource */
580 
581     if (ResourceSource->StringLength)
582     {
583         /* Point to the end of the AML descriptor */
584 
585         AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
586 
587         /* Copy the ResourceSourceIndex */
588 
589         AmlResourceSource[0] = (UINT8) ResourceSource->Index;
590 
591         /* Copy the ResourceSource string */
592 
593         strcpy (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
594             ResourceSource->StringPtr);
595 
596         /*
597          * Add the length of the string (+ 1 for null terminator) to the
598          * final descriptor length
599          */
600         DescriptorLength += ((ACPI_RSDESC_SIZE)
601             ResourceSource->StringLength + 1);
602     }
603 
604     /* Return the new total length of the AML descriptor */
605 
606     return (DescriptorLength);
607 }
608 
609 
610 /*******************************************************************************
611  *
612  * FUNCTION:    AcpiRsGetPrtMethodData
613  *
614  * PARAMETERS:  Node            - Device node
615  *              RetBuffer       - Pointer to a buffer structure for the
616  *                                results
617  *
618  * RETURN:      Status
619  *
620  * DESCRIPTION: This function is called to get the _PRT value of an object
621  *              contained in an object specified by the handle passed in
622  *
623  *              If the function fails an appropriate status will be returned
624  *              and the contents of the callers buffer is undefined.
625  *
626  ******************************************************************************/
627 
628 ACPI_STATUS
629 AcpiRsGetPrtMethodData (
630     ACPI_NAMESPACE_NODE     *Node,
631     ACPI_BUFFER             *RetBuffer)
632 {
633     ACPI_OPERAND_OBJECT     *ObjDesc;
634     ACPI_STATUS             Status;
635 
636 
637     ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
638 
639 
640     /* Parameters guaranteed valid by caller */
641 
642     /* Execute the method, no parameters */
643 
644     Status = AcpiUtEvaluateObject (
645         Node, METHOD_NAME__PRT, ACPI_BTYPE_PACKAGE, &ObjDesc);
646     if (ACPI_FAILURE (Status))
647     {
648         return_ACPI_STATUS (Status);
649     }
650 
651     /*
652      * Create a resource linked list from the byte stream buffer that comes
653      * back from the _CRS method execution.
654      */
655     Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
656 
657     /* On exit, we must delete the object returned by EvaluateObject */
658 
659     AcpiUtRemoveReference (ObjDesc);
660     return_ACPI_STATUS (Status);
661 }
662 
663 
664 /*******************************************************************************
665  *
666  * FUNCTION:    AcpiRsGetCrsMethodData
667  *
668  * PARAMETERS:  Node            - Device node
669  *              RetBuffer       - Pointer to a buffer structure for the
670  *                                results
671  *
672  * RETURN:      Status
673  *
674  * DESCRIPTION: This function is called to get the _CRS value of an object
675  *              contained in an object specified by the handle passed in
676  *
677  *              If the function fails an appropriate status will be returned
678  *              and the contents of the callers buffer is undefined.
679  *
680  ******************************************************************************/
681 
682 ACPI_STATUS
683 AcpiRsGetCrsMethodData (
684     ACPI_NAMESPACE_NODE     *Node,
685     ACPI_BUFFER             *RetBuffer)
686 {
687     ACPI_OPERAND_OBJECT     *ObjDesc;
688     ACPI_STATUS             Status;
689 
690 
691     ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
692 
693 
694     /* Parameters guaranteed valid by caller */
695 
696     /* Execute the method, no parameters */
697 
698     Status = AcpiUtEvaluateObject (
699         Node, METHOD_NAME__CRS, ACPI_BTYPE_BUFFER, &ObjDesc);
700     if (ACPI_FAILURE (Status))
701     {
702         return_ACPI_STATUS (Status);
703     }
704 
705     /*
706      * Make the call to create a resource linked list from the
707      * byte stream buffer that comes back from the _CRS method
708      * execution.
709      */
710     Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
711 
712     /* On exit, we must delete the object returned by evaluateObject */
713 
714     AcpiUtRemoveReference (ObjDesc);
715     return_ACPI_STATUS (Status);
716 }
717 
718 
719 /*******************************************************************************
720  *
721  * FUNCTION:    AcpiRsGetPrsMethodData
722  *
723  * PARAMETERS:  Node            - Device node
724  *              RetBuffer       - Pointer to a buffer structure for the
725  *                                results
726  *
727  * RETURN:      Status
728  *
729  * DESCRIPTION: This function is called to get the _PRS value of an object
730  *              contained in an object specified by the handle passed in
731  *
732  *              If the function fails an appropriate status will be returned
733  *              and the contents of the callers buffer is undefined.
734  *
735  ******************************************************************************/
736 
737 ACPI_STATUS
738 AcpiRsGetPrsMethodData (
739     ACPI_NAMESPACE_NODE     *Node,
740     ACPI_BUFFER             *RetBuffer)
741 {
742     ACPI_OPERAND_OBJECT     *ObjDesc;
743     ACPI_STATUS             Status;
744 
745 
746     ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
747 
748 
749     /* Parameters guaranteed valid by caller */
750 
751     /* Execute the method, no parameters */
752 
753     Status = AcpiUtEvaluateObject (
754         Node, METHOD_NAME__PRS, ACPI_BTYPE_BUFFER, &ObjDesc);
755     if (ACPI_FAILURE (Status))
756     {
757         return_ACPI_STATUS (Status);
758     }
759 
760     /*
761      * Make the call to create a resource linked list from the
762      * byte stream buffer that comes back from the _CRS method
763      * execution.
764      */
765     Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
766 
767     /* On exit, we must delete the object returned by evaluateObject */
768 
769     AcpiUtRemoveReference (ObjDesc);
770     return_ACPI_STATUS (Status);
771 }
772 
773 
774 /*******************************************************************************
775  *
776  * FUNCTION:    AcpiRsGetAeiMethodData
777  *
778  * PARAMETERS:  Node            - Device node
779  *              RetBuffer       - Pointer to a buffer structure for the
780  *                                results
781  *
782  * RETURN:      Status
783  *
784  * DESCRIPTION: This function is called to get the _AEI value of an object
785  *              contained in an object specified by the handle passed in
786  *
787  *              If the function fails an appropriate status will be returned
788  *              and the contents of the callers buffer is undefined.
789  *
790  ******************************************************************************/
791 
792 ACPI_STATUS
793 AcpiRsGetAeiMethodData (
794     ACPI_NAMESPACE_NODE     *Node,
795     ACPI_BUFFER             *RetBuffer)
796 {
797     ACPI_OPERAND_OBJECT     *ObjDesc;
798     ACPI_STATUS             Status;
799 
800 
801     ACPI_FUNCTION_TRACE (RsGetAeiMethodData);
802 
803 
804     /* Parameters guaranteed valid by caller */
805 
806     /* Execute the method, no parameters */
807 
808     Status = AcpiUtEvaluateObject (
809         Node, METHOD_NAME__AEI, ACPI_BTYPE_BUFFER, &ObjDesc);
810     if (ACPI_FAILURE (Status))
811     {
812         return_ACPI_STATUS (Status);
813     }
814 
815     /*
816      * Make the call to create a resource linked list from the
817      * byte stream buffer that comes back from the _CRS method
818      * execution.
819      */
820     Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
821 
822     /* On exit, we must delete the object returned by evaluateObject */
823 
824     AcpiUtRemoveReference (ObjDesc);
825     return_ACPI_STATUS (Status);
826 }
827 
828 
829 /*******************************************************************************
830  *
831  * FUNCTION:    AcpiRsGetMethodData
832  *
833  * PARAMETERS:  Handle          - Handle to the containing object
834  *              Path            - Path to method, relative to Handle
835  *              RetBuffer       - Pointer to a buffer structure for the
836  *                                results
837  *
838  * RETURN:      Status
839  *
840  * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
841  *              object contained in an object specified by the handle passed in
842  *
843  *              If the function fails an appropriate status will be returned
844  *              and the contents of the callers buffer is undefined.
845  *
846  ******************************************************************************/
847 
848 ACPI_STATUS
849 AcpiRsGetMethodData (
850     ACPI_HANDLE             Handle,
851     const char              *Path,
852     ACPI_BUFFER             *RetBuffer)
853 {
854     ACPI_OPERAND_OBJECT     *ObjDesc;
855     ACPI_STATUS             Status;
856 
857 
858     ACPI_FUNCTION_TRACE (RsGetMethodData);
859 
860 
861     /* Parameters guaranteed valid by caller */
862 
863     /* Execute the method, no parameters */
864 
865     Status = AcpiUtEvaluateObject (
866         ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle),
867         Path, ACPI_BTYPE_BUFFER, &ObjDesc);
868     if (ACPI_FAILURE (Status))
869     {
870         return_ACPI_STATUS (Status);
871     }
872 
873     /*
874      * Make the call to create a resource linked list from the
875      * byte stream buffer that comes back from the method
876      * execution.
877      */
878     Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
879 
880     /* On exit, we must delete the object returned by EvaluateObject */
881 
882     AcpiUtRemoveReference (ObjDesc);
883     return_ACPI_STATUS (Status);
884 }
885 
886 
887 /*******************************************************************************
888  *
889  * FUNCTION:    AcpiRsSetSrsMethodData
890  *
891  * PARAMETERS:  Node            - Device node
892  *              InBuffer        - Pointer to a buffer structure of the
893  *                                parameter
894  *
895  * RETURN:      Status
896  *
897  * DESCRIPTION: This function is called to set the _SRS of an object contained
898  *              in an object specified by the handle passed in
899  *
900  *              If the function fails an appropriate status will be returned
901  *              and the contents of the callers buffer is undefined.
902  *
903  * Note: Parameters guaranteed valid by caller
904  *
905  ******************************************************************************/
906 
907 ACPI_STATUS
908 AcpiRsSetSrsMethodData (
909     ACPI_NAMESPACE_NODE     *Node,
910     ACPI_BUFFER             *InBuffer)
911 {
912     ACPI_EVALUATE_INFO      *Info;
913     ACPI_OPERAND_OBJECT     *Args[2];
914     ACPI_STATUS             Status;
915     ACPI_BUFFER             Buffer;
916 
917 
918     ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
919 
920 
921     /* Allocate and initialize the evaluation information block */
922 
923     Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
924     if (!Info)
925     {
926         return_ACPI_STATUS (AE_NO_MEMORY);
927     }
928 
929     Info->PrefixNode = Node;
930     Info->RelativePathname = METHOD_NAME__SRS;
931     Info->Parameters = Args;
932     Info->Flags = ACPI_IGNORE_RETURN_VALUE;
933 
934     /*
935      * The InBuffer parameter will point to a linked list of
936      * resource parameters. It needs to be formatted into a
937      * byte stream to be sent in as an input parameter to _SRS
938      *
939      * Convert the linked list into a byte stream
940      */
941     Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
942     Status = AcpiRsCreateAmlResources (InBuffer, &Buffer);
943     if (ACPI_FAILURE (Status))
944     {
945         goto Cleanup;
946     }
947 
948     /* Create and initialize the method parameter object */
949 
950     Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
951     if (!Args[0])
952     {
953         /*
954          * Must free the buffer allocated above (otherwise it is freed
955          * later)
956          */
957         ACPI_FREE (Buffer.Pointer);
958         Status = AE_NO_MEMORY;
959         goto Cleanup;
960     }
961 
962     Args[0]->Buffer.Length  = (UINT32) Buffer.Length;
963     Args[0]->Buffer.Pointer = Buffer.Pointer;
964     Args[0]->Common.Flags   = AOPOBJ_DATA_VALID;
965     Args[1] = NULL;
966 
967     /* Execute the method, no return value is expected */
968 
969     Status = AcpiNsEvaluate (Info);
970 
971     /* Clean up and return the status from AcpiNsEvaluate */
972 
973     AcpiUtRemoveReference (Args[0]);
974 
975 Cleanup:
976     ACPI_FREE (Info);
977     return_ACPI_STATUS (Status);
978 }
979