xref: /freebsd/sys/contrib/dev/acpica/components/namespace/nspredef.c (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229)
1 /******************************************************************************
2  *
3  * Module Name: nspredef - Validation of ACPI predefined methods and objects
4  *
5  *****************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2020, 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 ACPI_CREATE_PREDEFINED_TABLE
153 
154 #include <contrib/dev/acpica/include/acpi.h>
155 #include <contrib/dev/acpica/include/accommon.h>
156 #include <contrib/dev/acpica/include/acnamesp.h>
157 #include <contrib/dev/acpica/include/acpredef.h>
158 
159 
160 #define _COMPONENT          ACPI_NAMESPACE
161         ACPI_MODULE_NAME    ("nspredef")
162 
163 
164 /*******************************************************************************
165  *
166  * This module validates predefined ACPI objects that appear in the namespace,
167  * at the time they are evaluated (via AcpiEvaluateObject). The purpose of this
168  * validation is to detect problems with BIOS-exposed predefined ACPI objects
169  * before the results are returned to the ACPI-related drivers.
170  *
171  * There are several areas that are validated:
172  *
173  *  1) The number of input arguments as defined by the method/object in the
174  *     ASL is validated against the ACPI specification.
175  *  2) The type of the return object (if any) is validated against the ACPI
176  *     specification.
177  *  3) For returned package objects, the count of package elements is
178  *     validated, as well as the type of each package element. Nested
179  *     packages are supported.
180  *
181  * For any problems found, a warning message is issued.
182  *
183  ******************************************************************************/
184 
185 
186 /* Local prototypes */
187 
188 static ACPI_STATUS
189 AcpiNsCheckReference (
190     ACPI_EVALUATE_INFO          *Info,
191     ACPI_OPERAND_OBJECT         *ReturnObject);
192 
193 static UINT32
194 AcpiNsGetBitmappedType (
195     ACPI_OPERAND_OBJECT         *ReturnObject);
196 
197 
198 /*******************************************************************************
199  *
200  * FUNCTION:    AcpiNsCheckReturnValue
201  *
202  * PARAMETERS:  Node            - Namespace node for the method/object
203  *              Info            - Method execution information block
204  *              UserParamCount  - Number of parameters actually passed
205  *              ReturnStatus    - Status from the object evaluation
206  *              ReturnObjectPtr - Pointer to the object returned from the
207  *                                evaluation of a method or object
208  *
209  * RETURN:      Status
210  *
211  * DESCRIPTION: Check the value returned from a predefined name.
212  *
213  ******************************************************************************/
214 
215 ACPI_STATUS
216 AcpiNsCheckReturnValue (
217     ACPI_NAMESPACE_NODE         *Node,
218     ACPI_EVALUATE_INFO          *Info,
219     UINT32                      UserParamCount,
220     ACPI_STATUS                 ReturnStatus,
221     ACPI_OPERAND_OBJECT         **ReturnObjectPtr)
222 {
223     ACPI_STATUS                 Status;
224     const ACPI_PREDEFINED_INFO  *Predefined;
225 
226     ACPI_FUNCTION_TRACE (NsCheckReturnValue);
227 
228     /* If not a predefined name, we cannot validate the return object */
229 
230     Predefined = Info->Predefined;
231     if (!Predefined)
232     {
233         return_ACPI_STATUS (AE_OK);
234     }
235 
236     /*
237      * If the method failed or did not actually return an object, we cannot
238      * validate the return object
239      */
240     if ((ReturnStatus != AE_OK) &&
241         (ReturnStatus != AE_CTRL_RETURN_VALUE))
242     {
243         return_ACPI_STATUS (AE_OK);
244     }
245 
246     /*
247      * Return value validation and possible repair.
248      *
249      * 1) Don't perform return value validation/repair if this feature
250      * has been disabled via a global option.
251      *
252      * 2) We have a return value, but if one wasn't expected, just exit,
253      * this is not a problem. For example, if the "Implicit Return"
254      * feature is enabled, methods will always return a value.
255      *
256      * 3) If the return value can be of any type, then we cannot perform
257      * any validation, just exit.
258      */
259     if (AcpiGbl_DisableAutoRepair ||
260         (!Predefined->Info.ExpectedBtypes) ||
261         (Predefined->Info.ExpectedBtypes == ACPI_RTYPE_ALL))
262     {
263         return_ACPI_STATUS (AE_OK);
264     }
265 
266     /*
267      * Check that the type of the main return object is what is expected
268      * for this predefined name
269      */
270     Status = AcpiNsCheckObjectType (Info, ReturnObjectPtr,
271         Predefined->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT);
272     if (ACPI_FAILURE (Status))
273     {
274         goto Exit;
275     }
276 
277     /*
278      *
279      * 4) If there is no return value and it is optional, just return
280      * AE_OK (_WAK).
281      */
282     if (!(*ReturnObjectPtr))
283     {
284         goto Exit;
285     }
286 
287     /*
288      * For returned Package objects, check the type of all sub-objects.
289      * Note: Package may have been newly created by call above.
290      */
291     if ((*ReturnObjectPtr)->Common.Type == ACPI_TYPE_PACKAGE)
292     {
293         Info->ParentPackage = *ReturnObjectPtr;
294         Status = AcpiNsCheckPackage (Info, ReturnObjectPtr);
295         if (ACPI_FAILURE (Status))
296         {
297             /* We might be able to fix some errors */
298 
299             if ((Status != AE_AML_OPERAND_TYPE) &&
300                 (Status != AE_AML_OPERAND_VALUE))
301             {
302                 goto Exit;
303             }
304         }
305     }
306 
307     /*
308      * The return object was OK, or it was successfully repaired above.
309      * Now make some additional checks such as verifying that package
310      * objects are sorted correctly (if required) or buffer objects have
311      * the correct data width (bytes vs. dwords). These repairs are
312      * performed on a per-name basis, i.e., the code is specific to
313      * particular predefined names.
314      */
315     Status = AcpiNsComplexRepairs (Info, Node, Status, ReturnObjectPtr);
316 
317 Exit:
318     /*
319      * If the object validation failed or if we successfully repaired one
320      * or more objects, mark the parent node to suppress further warning
321      * messages during the next evaluation of the same method/object.
322      */
323     if (ACPI_FAILURE (Status) ||
324        (Info->ReturnFlags & ACPI_OBJECT_REPAIRED))
325     {
326         Node->Flags |= ANOBJ_EVALUATED;
327     }
328 
329     return_ACPI_STATUS (Status);
330 }
331 
332 
333 /*******************************************************************************
334  *
335  * FUNCTION:    AcpiNsCheckObjectType
336  *
337  * PARAMETERS:  Info            - Method execution information block
338  *              ReturnObjectPtr - Pointer to the object returned from the
339  *                                evaluation of a method or object
340  *              ExpectedBtypes  - Bitmap of expected return type(s)
341  *              PackageIndex    - Index of object within parent package (if
342  *                                applicable - ACPI_NOT_PACKAGE_ELEMENT
343  *                                otherwise)
344  *
345  * RETURN:      Status
346  *
347  * DESCRIPTION: Check the type of the return object against the expected object
348  *              type(s). Use of Btype allows multiple expected object types.
349  *
350  ******************************************************************************/
351 
352 ACPI_STATUS
353 AcpiNsCheckObjectType (
354     ACPI_EVALUATE_INFO          *Info,
355     ACPI_OPERAND_OBJECT         **ReturnObjectPtr,
356     UINT32                      ExpectedBtypes,
357     UINT32                      PackageIndex)
358 {
359     ACPI_OPERAND_OBJECT         *ReturnObject = *ReturnObjectPtr;
360     ACPI_STATUS                 Status = AE_OK;
361     char                        TypeBuffer[96]; /* Room for 10 types */
362 
363 
364     /* A Namespace node should not get here, but make sure */
365 
366     if (ReturnObject &&
367         ACPI_GET_DESCRIPTOR_TYPE (ReturnObject) == ACPI_DESC_TYPE_NAMED)
368     {
369         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
370             "Invalid return type - Found a Namespace node [%4.4s] type %s",
371             ReturnObject->Node.Name.Ascii,
372             AcpiUtGetTypeName (ReturnObject->Node.Type)));
373         return (AE_AML_OPERAND_TYPE);
374     }
375 
376     /*
377      * Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
378      * The bitmapped type allows multiple possible return types.
379      *
380      * Note, the cases below must handle all of the possible types returned
381      * from all of the predefined names (including elements of returned
382      * packages)
383      */
384     Info->ReturnBtype = AcpiNsGetBitmappedType (ReturnObject);
385     if (Info->ReturnBtype == ACPI_RTYPE_ANY)
386     {
387         /* Not one of the supported objects, must be incorrect */
388         goto TypeErrorExit;
389     }
390 
391     /* For reference objects, check that the reference type is correct */
392 
393     if ((Info->ReturnBtype & ExpectedBtypes) == ACPI_RTYPE_REFERENCE)
394     {
395         Status = AcpiNsCheckReference (Info, ReturnObject);
396         return (Status);
397     }
398 
399     /* Attempt simple repair of the returned object if necessary */
400 
401     Status = AcpiNsSimpleRepair (Info, ExpectedBtypes,
402         PackageIndex, ReturnObjectPtr);
403     if (ACPI_SUCCESS (Status))
404     {
405         return (AE_OK); /* Successful repair */
406     }
407 
408 
409 TypeErrorExit:
410 
411     /* Create a string with all expected types for this predefined object */
412 
413     AcpiUtGetExpectedReturnTypes (TypeBuffer, ExpectedBtypes);
414 
415     if (!ReturnObject)
416     {
417         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
418             "Expected return object of type %s",
419             TypeBuffer));
420     }
421     else if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
422     {
423         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
424             "Return type mismatch - found %s, expected %s",
425             AcpiUtGetObjectTypeName (ReturnObject), TypeBuffer));
426     }
427     else
428     {
429         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
430             "Return Package type mismatch at index %u - "
431             "found %s, expected %s", PackageIndex,
432             AcpiUtGetObjectTypeName (ReturnObject), TypeBuffer));
433     }
434 
435     return (AE_AML_OPERAND_TYPE);
436 }
437 
438 
439 /*******************************************************************************
440  *
441  * FUNCTION:    AcpiNsCheckReference
442  *
443  * PARAMETERS:  Info            - Method execution information block
444  *              ReturnObject    - Object returned from the evaluation of a
445  *                                method or object
446  *
447  * RETURN:      Status
448  *
449  * DESCRIPTION: Check a returned reference object for the correct reference
450  *              type. The only reference type that can be returned from a
451  *              predefined method is a named reference. All others are invalid.
452  *
453  ******************************************************************************/
454 
455 static ACPI_STATUS
456 AcpiNsCheckReference (
457     ACPI_EVALUATE_INFO          *Info,
458     ACPI_OPERAND_OBJECT         *ReturnObject)
459 {
460 
461     /*
462      * Check the reference object for the correct reference type (opcode).
463      * The only type of reference that can be converted to an ACPI_OBJECT is
464      * a reference to a named object (reference class: NAME)
465      */
466     if (ReturnObject->Reference.Class == ACPI_REFCLASS_NAME)
467     {
468         return (AE_OK);
469     }
470 
471     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
472         "Return type mismatch - unexpected reference object type [%s] %2.2X",
473         AcpiUtGetReferenceName (ReturnObject),
474         ReturnObject->Reference.Class));
475 
476     return (AE_AML_OPERAND_TYPE);
477 }
478 
479 
480 /*******************************************************************************
481  *
482  * FUNCTION:    AcpiNsGetBitmappedType
483  *
484  * PARAMETERS:  ReturnObject    - Object returned from method/obj evaluation
485  *
486  * RETURN:      Object return type. ACPI_RTYPE_ANY indicates that the object
487  *              type is not supported. ACPI_RTYPE_NONE indicates that no
488  *              object was returned (ReturnObject is NULL).
489  *
490  * DESCRIPTION: Convert object type into a bitmapped object return type.
491  *
492  ******************************************************************************/
493 
494 static UINT32
495 AcpiNsGetBitmappedType (
496     ACPI_OPERAND_OBJECT         *ReturnObject)
497 {
498     UINT32                      ReturnBtype;
499 
500 
501     if (!ReturnObject)
502     {
503         return (ACPI_RTYPE_NONE);
504     }
505 
506     /* Map ACPI_OBJECT_TYPE to internal bitmapped type */
507 
508     switch (ReturnObject->Common.Type)
509     {
510     case ACPI_TYPE_INTEGER:
511 
512         ReturnBtype = ACPI_RTYPE_INTEGER;
513         break;
514 
515     case ACPI_TYPE_BUFFER:
516 
517         ReturnBtype = ACPI_RTYPE_BUFFER;
518         break;
519 
520     case ACPI_TYPE_STRING:
521 
522         ReturnBtype = ACPI_RTYPE_STRING;
523         break;
524 
525     case ACPI_TYPE_PACKAGE:
526 
527         ReturnBtype = ACPI_RTYPE_PACKAGE;
528         break;
529 
530     case ACPI_TYPE_LOCAL_REFERENCE:
531 
532         ReturnBtype = ACPI_RTYPE_REFERENCE;
533         break;
534 
535     default:
536 
537         /* Not one of the supported objects, must be incorrect */
538 
539         ReturnBtype = ACPI_RTYPE_ANY;
540         break;
541     }
542 
543     return (ReturnBtype);
544 }
545