xref: /titanic_41/usr/src/uts/intel/io/acpica/utilities/uteval.c (revision 7801e5e8b5bc4af34929c54a02cfb78398da08dd)
1 /******************************************************************************
2  *
3  * Module Name: uteval - Object evaluation
4  *
5  *****************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2009, 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 #define __UTEVAL_C__
117 
118 #include "acpi.h"
119 #include "accommon.h"
120 #include "acnamesp.h"
121 
122 
123 #define _COMPONENT          ACPI_UTILITIES
124         ACPI_MODULE_NAME    ("uteval")
125 
126 
127 /*
128  * Strings supported by the _OSI predefined (internal) method.
129  *
130  * March 2009: Removed "Linux" as this host no longer wants to respond true
131  * for this string. Basically, the only safe OS strings are windows-related
132  * and in many or most cases represent the only test path within the
133  * BIOS-provided ASL code.
134  *
135  * The second element of each entry is used to track the newest version of
136  * Windows that the BIOS has requested.
137  */
138 static const ACPI_INTERFACE_INFO    AcpiInterfacesSupported[] =
139 {
140     /* Operating System Vendor Strings */
141 
142     {"Windows 2000",        ACPI_OSI_WIN_2000},         /* Windows 2000 */
143     {"Windows 2001",        ACPI_OSI_WIN_XP},           /* Windows XP */
144     {"Windows 2001 SP1",    ACPI_OSI_WIN_XP_SP1},       /* Windows XP SP1 */
145     {"Windows 2001.1",      ACPI_OSI_WINSRV_2003},      /* Windows Server 2003 */
146     {"Windows 2001 SP2",    ACPI_OSI_WIN_XP_SP2},       /* Windows XP SP2 */
147     {"Windows 2001.1 SP1",  ACPI_OSI_WINSRV_2003_SP1},  /* Windows Server 2003 SP1 - Added 03/2006 */
148     {"Windows 2006",        ACPI_OSI_WIN_VISTA},        /* Windows Vista - Added 03/2006 */
149     {"Windows 2006.1",      ACPI_OSI_WINSRV_2008},      /* Windows Server 2008 - Added 09/2009 */
150     {"Windows 2006 SP1",    ACPI_OSI_WIN_VISTA_SP1},    /* Windows Vista SP1 - Added 09/2009 */
151     {"Windows 2009",        ACPI_OSI_WIN_7},            /* Windows 7 and Server 2008 R2 - Added 09/2009 */
152 
153     /* Feature Group Strings */
154 
155     {"Extended Address Space Descriptor", 0}
156 
157     /*
158      * All "optional" feature group strings (features that are implemented
159      * by the host) should be implemented in the host version of
160      * AcpiOsValidateInterface and should not be added here.
161      */
162 };
163 
164 
165 /*******************************************************************************
166  *
167  * FUNCTION:    AcpiUtOsiImplementation
168  *
169  * PARAMETERS:  WalkState           - Current walk state
170  *
171  * RETURN:      Status
172  *
173  * DESCRIPTION: Implementation of the _OSI predefined control method
174  *
175  ******************************************************************************/
176 
177 ACPI_STATUS
178 AcpiUtOsiImplementation (
179     ACPI_WALK_STATE         *WalkState)
180 {
181     ACPI_STATUS             Status;
182     ACPI_OPERAND_OBJECT     *StringDesc;
183     ACPI_OPERAND_OBJECT     *ReturnDesc;
184     UINT32                  ReturnValue;
185     UINT32                  i;
186 
187 
188     ACPI_FUNCTION_TRACE (UtOsiImplementation);
189 
190 
191     /* Validate the string input argument */
192 
193     StringDesc = WalkState->Arguments[0].Object;
194     if (!StringDesc || (StringDesc->Common.Type != ACPI_TYPE_STRING))
195     {
196         return_ACPI_STATUS (AE_TYPE);
197     }
198 
199     /* Create a return object */
200 
201     ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
202     if (!ReturnDesc)
203     {
204         return_ACPI_STATUS (AE_NO_MEMORY);
205     }
206 
207     /* Default return value is 0, NOT SUPPORTED */
208 
209     ReturnValue = 0;
210 
211     /* Compare input string to static table of supported interfaces */
212 
213     for (i = 0; i < ACPI_ARRAY_LENGTH (AcpiInterfacesSupported); i++)
214     {
215         if (!ACPI_STRCMP (StringDesc->String.Pointer,
216                 AcpiInterfacesSupported[i].Name))
217         {
218             /*
219              * The interface is supported.
220              * Update the OsiData if necessary. We keep track of the latest
221              * version of Windows that has been requested by the BIOS.
222              */
223             if (AcpiInterfacesSupported[i].Value > AcpiGbl_OsiData)
224             {
225                 AcpiGbl_OsiData = AcpiInterfacesSupported[i].Value;
226             }
227 
228             ReturnValue = ACPI_UINT32_MAX;
229             goto Exit;
230         }
231     }
232 
233     /*
234      * Did not match the string in the static table, call the host OSL to
235      * check for a match with one of the optional strings (such as
236      * "Module Device", "3.0 Thermal Model", etc.)
237      */
238     Status = AcpiOsValidateInterface (StringDesc->String.Pointer);
239     if (ACPI_SUCCESS (Status))
240     {
241         /* The interface is supported */
242 
243         ReturnValue = ACPI_UINT32_MAX;
244     }
245 
246 
247 Exit:
248     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO,
249         "ACPI: BIOS _OSI(%s) is %ssupported\n",
250         StringDesc->String.Pointer, ReturnValue == 0 ? "not " : ""));
251 
252     /* Complete the return value */
253 
254     ReturnDesc->Integer.Value = ReturnValue;
255     WalkState->ReturnDesc = ReturnDesc;
256     return_ACPI_STATUS (AE_OK);
257 }
258 
259 
260 /*******************************************************************************
261  *
262  * FUNCTION:    AcpiUtEvaluateObject
263  *
264  * PARAMETERS:  PrefixNode          - Starting node
265  *              Path                - Path to object from starting node
266  *              ExpectedReturnTypes - Bitmap of allowed return types
267  *              ReturnDesc          - Where a return value is stored
268  *
269  * RETURN:      Status
270  *
271  * DESCRIPTION: Evaluates a namespace object and verifies the type of the
272  *              return object. Common code that simplifies accessing objects
273  *              that have required return objects of fixed types.
274  *
275  *              NOTE: Internal function, no parameter validation
276  *
277  ******************************************************************************/
278 
279 ACPI_STATUS
280 AcpiUtEvaluateObject (
281     ACPI_NAMESPACE_NODE     *PrefixNode,
282     char                    *Path,
283     UINT32                  ExpectedReturnBtypes,
284     ACPI_OPERAND_OBJECT     **ReturnDesc)
285 {
286     ACPI_EVALUATE_INFO      *Info;
287     ACPI_STATUS             Status;
288     UINT32                  ReturnBtype;
289 
290 
291     ACPI_FUNCTION_TRACE (UtEvaluateObject);
292 
293 
294     /* Allocate the evaluation information block */
295 
296     Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
297     if (!Info)
298     {
299         return_ACPI_STATUS (AE_NO_MEMORY);
300     }
301 
302     Info->PrefixNode = PrefixNode;
303     Info->Pathname = Path;
304 
305     /* Evaluate the object/method */
306 
307     Status = AcpiNsEvaluate (Info);
308     if (ACPI_FAILURE (Status))
309     {
310         if (Status == AE_NOT_FOUND)
311         {
312             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",
313                 AcpiUtGetNodeName (PrefixNode), Path));
314         }
315         else
316         {
317             ACPI_ERROR_METHOD ("Method execution failed",
318                 PrefixNode, Path, Status);
319         }
320 
321         goto Cleanup;
322     }
323 
324     /* Did we get a return object? */
325 
326     if (!Info->ReturnObject)
327     {
328         if (ExpectedReturnBtypes)
329         {
330             ACPI_ERROR_METHOD ("No object was returned from",
331                 PrefixNode, Path, AE_NOT_EXIST);
332 
333             Status = AE_NOT_EXIST;
334         }
335 
336         goto Cleanup;
337     }
338 
339     /* Map the return object type to the bitmapped type */
340 
341     switch ((Info->ReturnObject)->Common.Type)
342     {
343     case ACPI_TYPE_INTEGER:
344         ReturnBtype = ACPI_BTYPE_INTEGER;
345         break;
346 
347     case ACPI_TYPE_BUFFER:
348         ReturnBtype = ACPI_BTYPE_BUFFER;
349         break;
350 
351     case ACPI_TYPE_STRING:
352         ReturnBtype = ACPI_BTYPE_STRING;
353         break;
354 
355     case ACPI_TYPE_PACKAGE:
356         ReturnBtype = ACPI_BTYPE_PACKAGE;
357         break;
358 
359     default:
360         ReturnBtype = 0;
361         break;
362     }
363 
364     if ((AcpiGbl_EnableInterpreterSlack) &&
365         (!ExpectedReturnBtypes))
366     {
367         /*
368          * We received a return object, but one was not expected. This can
369          * happen frequently if the "implicit return" feature is enabled.
370          * Just delete the return object and return AE_OK.
371          */
372         AcpiUtRemoveReference (Info->ReturnObject);
373         goto Cleanup;
374     }
375 
376     /* Is the return object one of the expected types? */
377 
378     if (!(ExpectedReturnBtypes & ReturnBtype))
379     {
380         ACPI_ERROR_METHOD ("Return object type is incorrect",
381             PrefixNode, Path, AE_TYPE);
382 
383         ACPI_ERROR ((AE_INFO,
384             "Type returned from %s was incorrect: %s, expected Btypes: %X",
385             Path, AcpiUtGetObjectTypeName (Info->ReturnObject),
386             ExpectedReturnBtypes));
387 
388         /* On error exit, we must delete the return object */
389 
390         AcpiUtRemoveReference (Info->ReturnObject);
391         Status = AE_TYPE;
392         goto Cleanup;
393     }
394 
395     /* Object type is OK, return it */
396 
397     *ReturnDesc = Info->ReturnObject;
398 
399 Cleanup:
400     ACPI_FREE (Info);
401     return_ACPI_STATUS (Status);
402 }
403 
404 
405 /*******************************************************************************
406  *
407  * FUNCTION:    AcpiUtEvaluateNumericObject
408  *
409  * PARAMETERS:  ObjectName          - Object name to be evaluated
410  *              DeviceNode          - Node for the device
411  *              Value               - Where the value is returned
412  *
413  * RETURN:      Status
414  *
415  * DESCRIPTION: Evaluates a numeric namespace object for a selected device
416  *              and stores result in *Value.
417  *
418  *              NOTE: Internal function, no parameter validation
419  *
420  ******************************************************************************/
421 
422 ACPI_STATUS
423 AcpiUtEvaluateNumericObject (
424     char                    *ObjectName,
425     ACPI_NAMESPACE_NODE     *DeviceNode,
426     ACPI_INTEGER            *Value)
427 {
428     ACPI_OPERAND_OBJECT     *ObjDesc;
429     ACPI_STATUS             Status;
430 
431 
432     ACPI_FUNCTION_TRACE (UtEvaluateNumericObject);
433 
434 
435     Status = AcpiUtEvaluateObject (DeviceNode, ObjectName,
436                 ACPI_BTYPE_INTEGER, &ObjDesc);
437     if (ACPI_FAILURE (Status))
438     {
439         return_ACPI_STATUS (Status);
440     }
441 
442     /* Get the returned Integer */
443 
444     *Value = ObjDesc->Integer.Value;
445 
446     /* On exit, we must delete the return object */
447 
448     AcpiUtRemoveReference (ObjDesc);
449     return_ACPI_STATUS (Status);
450 }
451 
452 
453 /*******************************************************************************
454  *
455  * FUNCTION:    AcpiUtExecute_STA
456  *
457  * PARAMETERS:  DeviceNode          - Node for the device
458  *              Flags               - Where the status flags are returned
459  *
460  * RETURN:      Status
461  *
462  * DESCRIPTION: Executes _STA for selected device and stores results in
463  *              *Flags.
464  *
465  *              NOTE: Internal function, no parameter validation
466  *
467  ******************************************************************************/
468 
469 ACPI_STATUS
470 AcpiUtExecute_STA (
471     ACPI_NAMESPACE_NODE     *DeviceNode,
472     UINT32                  *Flags)
473 {
474     ACPI_OPERAND_OBJECT     *ObjDesc;
475     ACPI_STATUS             Status;
476 
477 
478     ACPI_FUNCTION_TRACE (UtExecute_STA);
479 
480 
481     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA,
482                 ACPI_BTYPE_INTEGER, &ObjDesc);
483     if (ACPI_FAILURE (Status))
484     {
485         if (AE_NOT_FOUND == Status)
486         {
487             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
488                 "_STA on %4.4s was not found, assuming device is present\n",
489                 AcpiUtGetNodeName (DeviceNode)));
490 
491             *Flags = ACPI_UINT32_MAX;
492             Status = AE_OK;
493         }
494 
495         return_ACPI_STATUS (Status);
496     }
497 
498     /* Extract the status flags */
499 
500     *Flags = (UINT32) ObjDesc->Integer.Value;
501 
502     /* On exit, we must delete the return object */
503 
504     AcpiUtRemoveReference (ObjDesc);
505     return_ACPI_STATUS (Status);
506 }
507 
508 
509 /*******************************************************************************
510  *
511  * FUNCTION:    AcpiUtExecutePowerMethods
512  *
513  * PARAMETERS:  DeviceNode          - Node for the device
514  *              MethodNames         - Array of power method names
515  *              MethodCount         - Number of methods to execute
516  *              OutValues           - Where the power method values are returned
517  *
518  * RETURN:      Status, OutValues
519  *
520  * DESCRIPTION: Executes the specified power methods for the device and returns
521  *              the result(s).
522  *
523  *              NOTE: Internal function, no parameter validation
524  *
525  ******************************************************************************/
526 
527 ACPI_STATUS
528 AcpiUtExecutePowerMethods (
529     ACPI_NAMESPACE_NODE     *DeviceNode,
530     const char              **MethodNames,
531     UINT8                   MethodCount,
532     UINT8                   *OutValues)
533 {
534     ACPI_OPERAND_OBJECT     *ObjDesc;
535     ACPI_STATUS             Status;
536     ACPI_STATUS             FinalStatus = AE_NOT_FOUND;
537     UINT32                  i;
538 
539 
540     ACPI_FUNCTION_TRACE (UtExecutePowerMethods);
541 
542 
543     for (i = 0; i < MethodCount; i++)
544     {
545         /*
546          * Execute the power method (_SxD or _SxW). The only allowable
547          * return type is an Integer.
548          */
549         Status = AcpiUtEvaluateObject (DeviceNode,
550                     ACPI_CAST_PTR (char, MethodNames[i]),
551                     ACPI_BTYPE_INTEGER, &ObjDesc);
552         if (ACPI_SUCCESS (Status))
553         {
554             OutValues[i] = (UINT8) ObjDesc->Integer.Value;
555 
556             /* Delete the return object */
557 
558             AcpiUtRemoveReference (ObjDesc);
559             FinalStatus = AE_OK;            /* At least one value is valid */
560             continue;
561         }
562 
563         OutValues[i] = ACPI_UINT8_MAX;
564         if (Status == AE_NOT_FOUND)
565         {
566             continue; /* Ignore if not found */
567         }
568 
569         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Failed %s on Device %4.4s, %s\n",
570             ACPI_CAST_PTR (char, MethodNames[i]),
571             AcpiUtGetNodeName (DeviceNode), AcpiFormatException (Status)));
572     }
573 
574     return_ACPI_STATUS (FinalStatus);
575 }
576