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b2deadd5 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsrepair - Repair for objects returned by predefined methods | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, Intel Corp. |
b2deadd5 BM |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | #include "acnamesp.h" | |
0240d7b4 | 47 | #include "acinterp.h" |
091f4d71 | 48 | #include "acpredef.h" |
b2deadd5 BM |
49 | |
50 | #define _COMPONENT ACPI_NAMESPACE | |
51 | ACPI_MODULE_NAME("nsrepair") | |
52 | ||
47e11d54 BM |
53 | /******************************************************************************* |
54 | * | |
55 | * This module attempts to repair or convert objects returned by the | |
56 | * predefined methods to an object type that is expected, as per the ACPI | |
57 | * specification. The need for this code is dictated by the many machines that | |
58 | * return incorrect types for the standard predefined methods. Performing these | |
59 | * conversions here, in one place, eliminates the need for individual ACPI | |
60 | * device drivers to do the same. Note: Most of these conversions are different | |
61 | * than the internal object conversion routines used for implicit object | |
62 | * conversion. | |
63 | * | |
64 | * The following conversions can be performed as necessary: | |
65 | * | |
66 | * Integer -> String | |
67 | * Integer -> Buffer | |
68 | * String -> Integer | |
69 | * String -> Buffer | |
70 | * Buffer -> Integer | |
71 | * Buffer -> String | |
72 | * Buffer -> Package of Integers | |
73 | * Package -> Package of one Package | |
74 | * | |
091f4d71 BM |
75 | * Additional possible repairs: |
76 | * | |
091f4d71 BM |
77 | * Required package elements that are NULL replaced by Integer/String/Buffer |
78 | * Incorrect standalone package wrapped with required outer package | |
79 | * | |
47e11d54 BM |
80 | ******************************************************************************/ |
81 | /* Local prototypes */ | |
82 | static acpi_status | |
83 | acpi_ns_convert_to_integer(union acpi_operand_object *original_object, | |
84 | union acpi_operand_object **return_object); | |
85 | ||
86 | static acpi_status | |
87 | acpi_ns_convert_to_string(union acpi_operand_object *original_object, | |
88 | union acpi_operand_object **return_object); | |
89 | ||
90 | static acpi_status | |
91 | acpi_ns_convert_to_buffer(union acpi_operand_object *original_object, | |
92 | union acpi_operand_object **return_object); | |
93 | ||
94 | static acpi_status | |
95 | acpi_ns_convert_to_package(union acpi_operand_object *original_object, | |
96 | union acpi_operand_object **return_object); | |
97 | ||
b2deadd5 BM |
98 | /******************************************************************************* |
99 | * | |
100 | * FUNCTION: acpi_ns_repair_object | |
101 | * | |
102 | * PARAMETERS: Data - Pointer to validation data structure | |
103 | * expected_btypes - Object types expected | |
104 | * package_index - Index of object within parent package (if | |
105 | * applicable - ACPI_NOT_PACKAGE_ELEMENT | |
106 | * otherwise) | |
107 | * return_object_ptr - Pointer to the object returned from the | |
108 | * evaluation of a method or object | |
109 | * | |
110 | * RETURN: Status. AE_OK if repair was successful. | |
111 | * | |
112 | * DESCRIPTION: Attempt to repair/convert a return object of a type that was | |
113 | * not expected. | |
114 | * | |
115 | ******************************************************************************/ | |
47e11d54 | 116 | |
b2deadd5 BM |
117 | acpi_status |
118 | acpi_ns_repair_object(struct acpi_predefined_data *data, | |
119 | u32 expected_btypes, | |
120 | u32 package_index, | |
121 | union acpi_operand_object **return_object_ptr) | |
122 | { | |
123 | union acpi_operand_object *return_object = *return_object_ptr; | |
124 | union acpi_operand_object *new_object; | |
0240d7b4 | 125 | acpi_status status; |
b2deadd5 | 126 | |
3a58176e BM |
127 | ACPI_FUNCTION_NAME(ns_repair_object); |
128 | ||
27526993 BM |
129 | /* |
130 | * At this point, we know that the type of the returned object was not | |
131 | * one of the expected types for this predefined name. Attempt to | |
47e11d54 BM |
132 | * repair the object by converting it to one of the expected object |
133 | * types for this predefined name. | |
134 | */ | |
135 | if (expected_btypes & ACPI_RTYPE_INTEGER) { | |
136 | status = acpi_ns_convert_to_integer(return_object, &new_object); | |
137 | if (ACPI_SUCCESS(status)) { | |
138 | goto object_repaired; | |
139 | } | |
140 | } | |
141 | if (expected_btypes & ACPI_RTYPE_STRING) { | |
142 | status = acpi_ns_convert_to_string(return_object, &new_object); | |
143 | if (ACPI_SUCCESS(status)) { | |
144 | goto object_repaired; | |
145 | } | |
146 | } | |
147 | if (expected_btypes & ACPI_RTYPE_BUFFER) { | |
148 | status = acpi_ns_convert_to_buffer(return_object, &new_object); | |
149 | if (ACPI_SUCCESS(status)) { | |
150 | goto object_repaired; | |
151 | } | |
152 | } | |
153 | if (expected_btypes & ACPI_RTYPE_PACKAGE) { | |
154 | status = acpi_ns_convert_to_package(return_object, &new_object); | |
155 | if (ACPI_SUCCESS(status)) { | |
156 | goto object_repaired; | |
157 | } | |
158 | } | |
159 | ||
160 | /* We cannot repair this object */ | |
161 | ||
162 | return (AE_AML_OPERAND_TYPE); | |
163 | ||
164 | object_repaired: | |
165 | ||
166 | /* Object was successfully repaired */ | |
167 | ||
168 | /* | |
169 | * If the original object is a package element, we need to: | |
170 | * 1. Set the reference count of the new object to match the | |
171 | * reference count of the old object. | |
172 | * 2. Decrement the reference count of the original object. | |
27526993 | 173 | */ |
47e11d54 BM |
174 | if (package_index != ACPI_NOT_PACKAGE_ELEMENT) { |
175 | new_object->common.reference_count = | |
176 | return_object->common.reference_count; | |
177 | ||
178 | if (return_object->common.reference_count > 1) { | |
179 | return_object->common.reference_count--; | |
180 | } | |
181 | ||
3a58176e BM |
182 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, |
183 | "%s: Converted %s to expected %s at index %u\n", | |
184 | data->pathname, | |
185 | acpi_ut_get_object_type_name(return_object), | |
186 | acpi_ut_get_object_type_name(new_object), | |
187 | package_index)); | |
47e11d54 | 188 | } else { |
3a58176e BM |
189 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, |
190 | "%s: Converted %s to expected %s\n", | |
191 | data->pathname, | |
192 | acpi_ut_get_object_type_name(return_object), | |
193 | acpi_ut_get_object_type_name(new_object))); | |
47e11d54 BM |
194 | } |
195 | ||
196 | /* Delete old object, install the new return object */ | |
197 | ||
198 | acpi_ut_remove_reference(return_object); | |
199 | *return_object_ptr = new_object; | |
200 | data->flags |= ACPI_OBJECT_REPAIRED; | |
201 | return (AE_OK); | |
202 | } | |
203 | ||
204 | /******************************************************************************* | |
205 | * | |
206 | * FUNCTION: acpi_ns_convert_to_integer | |
207 | * | |
208 | * PARAMETERS: original_object - Object to be converted | |
209 | * return_object - Where the new converted object is returned | |
210 | * | |
211 | * RETURN: Status. AE_OK if conversion was successful. | |
212 | * | |
213 | * DESCRIPTION: Attempt to convert a String/Buffer object to an Integer. | |
214 | * | |
215 | ******************************************************************************/ | |
216 | ||
217 | static acpi_status | |
218 | acpi_ns_convert_to_integer(union acpi_operand_object *original_object, | |
219 | union acpi_operand_object **return_object) | |
220 | { | |
221 | union acpi_operand_object *new_object; | |
222 | acpi_status status; | |
223 | u64 value = 0; | |
224 | u32 i; | |
225 | ||
226 | switch (original_object->common.type) { | |
227 | case ACPI_TYPE_STRING: | |
228 | ||
229 | /* String-to-Integer conversion */ | |
230 | ||
231 | status = acpi_ut_strtoul64(original_object->string.pointer, | |
232 | ACPI_ANY_BASE, &value); | |
233 | if (ACPI_FAILURE(status)) { | |
234 | return (status); | |
235 | } | |
236 | break; | |
237 | ||
b2deadd5 BM |
238 | case ACPI_TYPE_BUFFER: |
239 | ||
47e11d54 | 240 | /* Buffer-to-Integer conversion. Max buffer size is 64 bits. */ |
b2deadd5 | 241 | |
47e11d54 | 242 | if (original_object->buffer.length > 8) { |
b2deadd5 BM |
243 | return (AE_AML_OPERAND_TYPE); |
244 | } | |
245 | ||
47e11d54 BM |
246 | /* Extract each buffer byte to create the integer */ |
247 | ||
248 | for (i = 0; i < original_object->buffer.length; i++) { | |
249 | value |= | |
250 | ((u64) original_object->buffer. | |
251 | pointer[i] << (i * 8)); | |
252 | } | |
253 | break; | |
254 | ||
255 | default: | |
256 | return (AE_AML_OPERAND_TYPE); | |
257 | } | |
258 | ||
259 | new_object = acpi_ut_create_integer_object(value); | |
260 | if (!new_object) { | |
261 | return (AE_NO_MEMORY); | |
262 | } | |
263 | ||
264 | *return_object = new_object; | |
265 | return (AE_OK); | |
266 | } | |
267 | ||
268 | /******************************************************************************* | |
269 | * | |
270 | * FUNCTION: acpi_ns_convert_to_string | |
271 | * | |
272 | * PARAMETERS: original_object - Object to be converted | |
273 | * return_object - Where the new converted object is returned | |
274 | * | |
275 | * RETURN: Status. AE_OK if conversion was successful. | |
276 | * | |
277 | * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String. | |
278 | * | |
279 | ******************************************************************************/ | |
280 | ||
281 | static acpi_status | |
282 | acpi_ns_convert_to_string(union acpi_operand_object *original_object, | |
283 | union acpi_operand_object **return_object) | |
284 | { | |
285 | union acpi_operand_object *new_object; | |
286 | acpi_size length; | |
287 | acpi_status status; | |
288 | ||
289 | switch (original_object->common.type) { | |
290 | case ACPI_TYPE_INTEGER: | |
b2deadd5 | 291 | /* |
47e11d54 BM |
292 | * Integer-to-String conversion. Commonly, convert |
293 | * an integer of value 0 to a NULL string. The last element of | |
294 | * _BIF and _BIX packages occasionally need this fix. | |
295 | */ | |
296 | if (original_object->integer.value == 0) { | |
297 | ||
298 | /* Allocate a new NULL string object */ | |
299 | ||
300 | new_object = acpi_ut_create_string_object(0); | |
301 | if (!new_object) { | |
302 | return (AE_NO_MEMORY); | |
303 | } | |
304 | } else { | |
305 | status = | |
306 | acpi_ex_convert_to_string(original_object, | |
307 | &new_object, | |
308 | ACPI_IMPLICIT_CONVERT_HEX); | |
309 | if (ACPI_FAILURE(status)) { | |
310 | return (status); | |
311 | } | |
312 | } | |
313 | break; | |
314 | ||
315 | case ACPI_TYPE_BUFFER: | |
316 | /* | |
317 | * Buffer-to-String conversion. Use a to_string | |
b2deadd5 BM |
318 | * conversion, no transform performed on the buffer data. The best |
319 | * example of this is the _BIF method, where the string data from | |
320 | * the battery is often (incorrectly) returned as buffer object(s). | |
321 | */ | |
322 | length = 0; | |
47e11d54 BM |
323 | while ((length < original_object->buffer.length) && |
324 | (original_object->buffer.pointer[length])) { | |
b2deadd5 BM |
325 | length++; |
326 | } | |
327 | ||
328 | /* Allocate a new string object */ | |
329 | ||
330 | new_object = acpi_ut_create_string_object(length); | |
331 | if (!new_object) { | |
332 | return (AE_NO_MEMORY); | |
333 | } | |
334 | ||
335 | /* | |
336 | * Copy the raw buffer data with no transform. String is already NULL | |
337 | * terminated at Length+1. | |
338 | */ | |
339 | ACPI_MEMCPY(new_object->string.pointer, | |
47e11d54 | 340 | original_object->buffer.pointer, length); |
27526993 | 341 | break; |
b2deadd5 | 342 | |
47e11d54 BM |
343 | default: |
344 | return (AE_AML_OPERAND_TYPE); | |
345 | } | |
27526993 | 346 | |
47e11d54 BM |
347 | *return_object = new_object; |
348 | return (AE_OK); | |
349 | } | |
0240d7b4 | 350 | |
47e11d54 BM |
351 | /******************************************************************************* |
352 | * | |
353 | * FUNCTION: acpi_ns_convert_to_buffer | |
354 | * | |
355 | * PARAMETERS: original_object - Object to be converted | |
356 | * return_object - Where the new converted object is returned | |
357 | * | |
358 | * RETURN: Status. AE_OK if conversion was successful. | |
359 | * | |
ea7c5ec1 | 360 | * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer. |
47e11d54 BM |
361 | * |
362 | ******************************************************************************/ | |
0240d7b4 | 363 | |
47e11d54 BM |
364 | static acpi_status |
365 | acpi_ns_convert_to_buffer(union acpi_operand_object *original_object, | |
366 | union acpi_operand_object **return_object) | |
367 | { | |
368 | union acpi_operand_object *new_object; | |
369 | acpi_status status; | |
ea7c5ec1 BM |
370 | union acpi_operand_object **elements; |
371 | u32 *dword_buffer; | |
372 | u32 count; | |
373 | u32 i; | |
b2deadd5 | 374 | |
47e11d54 BM |
375 | switch (original_object->common.type) { |
376 | case ACPI_TYPE_INTEGER: | |
377 | /* | |
378 | * Integer-to-Buffer conversion. | |
379 | * Convert the Integer to a packed-byte buffer. _MAT and other | |
380 | * objects need this sometimes, if a read has been performed on a | |
381 | * Field object that is less than or equal to the global integer | |
382 | * size (32 or 64 bits). | |
383 | */ | |
384 | status = | |
385 | acpi_ex_convert_to_buffer(original_object, &new_object); | |
386 | if (ACPI_FAILURE(status)) { | |
387 | return (status); | |
388 | } | |
389 | break; | |
b2deadd5 | 390 | |
47e11d54 | 391 | case ACPI_TYPE_STRING: |
27526993 | 392 | |
47e11d54 BM |
393 | /* String-to-Buffer conversion. Simple data copy */ |
394 | ||
395 | new_object = | |
396 | acpi_ut_create_buffer_object(original_object->string. | |
397 | length); | |
398 | if (!new_object) { | |
399 | return (AE_NO_MEMORY); | |
b2deadd5 | 400 | } |
47e11d54 BM |
401 | |
402 | ACPI_MEMCPY(new_object->buffer.pointer, | |
403 | original_object->string.pointer, | |
404 | original_object->string.length); | |
27526993 | 405 | break; |
b2deadd5 | 406 | |
ea7c5ec1 | 407 | case ACPI_TYPE_PACKAGE: |
43420bbb BM |
408 | /* |
409 | * This case is often seen for predefined names that must return a | |
410 | * Buffer object with multiple DWORD integers within. For example, | |
411 | * _FDE and _GTM. The Package can be converted to a Buffer. | |
412 | */ | |
ea7c5ec1 BM |
413 | |
414 | /* All elements of the Package must be integers */ | |
415 | ||
416 | elements = original_object->package.elements; | |
417 | count = original_object->package.count; | |
418 | ||
419 | for (i = 0; i < count; i++) { | |
420 | if ((!*elements) || | |
421 | ((*elements)->common.type != ACPI_TYPE_INTEGER)) { | |
422 | return (AE_AML_OPERAND_TYPE); | |
423 | } | |
424 | elements++; | |
425 | } | |
426 | ||
427 | /* Create the new buffer object to replace the Package */ | |
428 | ||
429 | new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count)); | |
430 | if (!new_object) { | |
431 | return (AE_NO_MEMORY); | |
432 | } | |
433 | ||
434 | /* Copy the package elements (integers) to the buffer as DWORDs */ | |
435 | ||
436 | elements = original_object->package.elements; | |
437 | dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer); | |
438 | ||
439 | for (i = 0; i < count; i++) { | |
440 | *dword_buffer = (u32) (*elements)->integer.value; | |
441 | dword_buffer++; | |
442 | elements++; | |
443 | } | |
444 | break; | |
445 | ||
27526993 | 446 | default: |
27526993 | 447 | return (AE_AML_OPERAND_TYPE); |
b2deadd5 BM |
448 | } |
449 | ||
47e11d54 BM |
450 | *return_object = new_object; |
451 | return (AE_OK); | |
452 | } | |
27526993 | 453 | |
47e11d54 BM |
454 | /******************************************************************************* |
455 | * | |
456 | * FUNCTION: acpi_ns_convert_to_package | |
457 | * | |
458 | * PARAMETERS: original_object - Object to be converted | |
459 | * return_object - Where the new converted object is returned | |
460 | * | |
461 | * RETURN: Status. AE_OK if conversion was successful. | |
462 | * | |
463 | * DESCRIPTION: Attempt to convert a Buffer object to a Package. Each byte of | |
464 | * the buffer is converted to a single integer package element. | |
465 | * | |
466 | ******************************************************************************/ | |
27526993 | 467 | |
47e11d54 BM |
468 | static acpi_status |
469 | acpi_ns_convert_to_package(union acpi_operand_object *original_object, | |
470 | union acpi_operand_object **return_object) | |
471 | { | |
472 | union acpi_operand_object *new_object; | |
473 | union acpi_operand_object **elements; | |
474 | u32 length; | |
475 | u8 *buffer; | |
476 | ||
477 | switch (original_object->common.type) { | |
478 | case ACPI_TYPE_BUFFER: | |
479 | ||
480 | /* Buffer-to-Package conversion */ | |
481 | ||
482 | length = original_object->buffer.length; | |
483 | new_object = acpi_ut_create_package_object(length); | |
484 | if (!new_object) { | |
485 | return (AE_NO_MEMORY); | |
27526993 BM |
486 | } |
487 | ||
47e11d54 | 488 | /* Convert each buffer byte to an integer package element */ |
27526993 | 489 | |
47e11d54 BM |
490 | elements = new_object->package.elements; |
491 | buffer = original_object->buffer.pointer; | |
27526993 | 492 | |
47e11d54 | 493 | while (length--) { |
ea7c5ec1 BM |
494 | *elements = |
495 | acpi_ut_create_integer_object((u64) *buffer); | |
47e11d54 BM |
496 | if (!*elements) { |
497 | acpi_ut_remove_reference(new_object); | |
498 | return (AE_NO_MEMORY); | |
499 | } | |
500 | elements++; | |
501 | buffer++; | |
502 | } | |
503 | break; | |
504 | ||
505 | default: | |
506 | return (AE_AML_OPERAND_TYPE); | |
507 | } | |
508 | ||
509 | *return_object = new_object; | |
27526993 | 510 | return (AE_OK); |
b2deadd5 | 511 | } |
e5f69d6e | 512 | |
091f4d71 BM |
513 | /******************************************************************************* |
514 | * | |
515 | * FUNCTION: acpi_ns_repair_null_element | |
516 | * | |
517 | * PARAMETERS: Data - Pointer to validation data structure | |
518 | * expected_btypes - Object types expected | |
519 | * package_index - Index of object within parent package (if | |
520 | * applicable - ACPI_NOT_PACKAGE_ELEMENT | |
521 | * otherwise) | |
522 | * return_object_ptr - Pointer to the object returned from the | |
523 | * evaluation of a method or object | |
524 | * | |
525 | * RETURN: Status. AE_OK if repair was successful. | |
526 | * | |
527 | * DESCRIPTION: Attempt to repair a NULL element of a returned Package object. | |
528 | * | |
529 | ******************************************************************************/ | |
530 | ||
531 | acpi_status | |
532 | acpi_ns_repair_null_element(struct acpi_predefined_data *data, | |
533 | u32 expected_btypes, | |
534 | u32 package_index, | |
535 | union acpi_operand_object **return_object_ptr) | |
536 | { | |
537 | union acpi_operand_object *return_object = *return_object_ptr; | |
538 | union acpi_operand_object *new_object; | |
539 | ||
540 | ACPI_FUNCTION_NAME(ns_repair_null_element); | |
541 | ||
542 | /* No repair needed if return object is non-NULL */ | |
543 | ||
544 | if (return_object) { | |
545 | return (AE_OK); | |
546 | } | |
547 | ||
548 | /* | |
549 | * Attempt to repair a NULL element of a Package object. This applies to | |
550 | * predefined names that return a fixed-length package and each element | |
551 | * is required. It does not apply to variable-length packages where NULL | |
552 | * elements are allowed, especially at the end of the package. | |
553 | */ | |
554 | if (expected_btypes & ACPI_RTYPE_INTEGER) { | |
555 | ||
556 | /* Need an Integer - create a zero-value integer */ | |
557 | ||
150dba38 | 558 | new_object = acpi_ut_create_integer_object((u64)0); |
091f4d71 BM |
559 | } else if (expected_btypes & ACPI_RTYPE_STRING) { |
560 | ||
561 | /* Need a String - create a NULL string */ | |
562 | ||
563 | new_object = acpi_ut_create_string_object(0); | |
564 | } else if (expected_btypes & ACPI_RTYPE_BUFFER) { | |
565 | ||
566 | /* Need a Buffer - create a zero-length buffer */ | |
567 | ||
568 | new_object = acpi_ut_create_buffer_object(0); | |
569 | } else { | |
570 | /* Error for all other expected types */ | |
571 | ||
572 | return (AE_AML_OPERAND_TYPE); | |
573 | } | |
574 | ||
575 | if (!new_object) { | |
576 | return (AE_NO_MEMORY); | |
577 | } | |
578 | ||
579 | /* Set the reference count according to the parent Package object */ | |
580 | ||
581 | new_object->common.reference_count = | |
582 | data->parent_package->common.reference_count; | |
583 | ||
584 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, | |
585 | "%s: Converted NULL package element to expected %s at index %u\n", | |
586 | data->pathname, | |
587 | acpi_ut_get_object_type_name(new_object), | |
588 | package_index)); | |
589 | ||
590 | *return_object_ptr = new_object; | |
591 | data->flags |= ACPI_OBJECT_REPAIRED; | |
592 | return (AE_OK); | |
593 | } | |
594 | ||
595 | /****************************************************************************** | |
596 | * | |
597 | * FUNCTION: acpi_ns_remove_null_elements | |
598 | * | |
599 | * PARAMETERS: Data - Pointer to validation data structure | |
600 | * package_type - An acpi_return_package_types value | |
601 | * obj_desc - A Package object | |
602 | * | |
603 | * RETURN: None. | |
604 | * | |
605 | * DESCRIPTION: Remove all NULL package elements from packages that contain | |
606 | * a variable number of sub-packages. For these types of | |
607 | * packages, NULL elements can be safely removed. | |
608 | * | |
609 | *****************************************************************************/ | |
610 | ||
611 | void | |
612 | acpi_ns_remove_null_elements(struct acpi_predefined_data *data, | |
613 | u8 package_type, | |
614 | union acpi_operand_object *obj_desc) | |
615 | { | |
616 | union acpi_operand_object **source; | |
617 | union acpi_operand_object **dest; | |
618 | u32 count; | |
619 | u32 new_count; | |
620 | u32 i; | |
621 | ||
622 | ACPI_FUNCTION_NAME(ns_remove_null_elements); | |
623 | ||
624 | /* | |
945488b9 BM |
625 | * We can safely remove all NULL elements from these package types: |
626 | * PTYPE1_VAR packages contain a variable number of simple data types. | |
627 | * PTYPE2 packages contain a variable number of sub-packages. | |
091f4d71 BM |
628 | */ |
629 | switch (package_type) { | |
091f4d71 | 630 | case ACPI_PTYPE1_VAR: |
091f4d71 BM |
631 | case ACPI_PTYPE2: |
632 | case ACPI_PTYPE2_COUNT: | |
633 | case ACPI_PTYPE2_PKG_COUNT: | |
634 | case ACPI_PTYPE2_FIXED: | |
635 | case ACPI_PTYPE2_MIN: | |
636 | case ACPI_PTYPE2_REV_FIXED: | |
7fce7a4b | 637 | case ACPI_PTYPE2_FIX_VAR: |
091f4d71 BM |
638 | break; |
639 | ||
640 | default: | |
945488b9 BM |
641 | case ACPI_PTYPE1_FIXED: |
642 | case ACPI_PTYPE1_OPTION: | |
091f4d71 BM |
643 | return; |
644 | } | |
645 | ||
646 | count = obj_desc->package.count; | |
647 | new_count = count; | |
648 | ||
649 | source = obj_desc->package.elements; | |
650 | dest = source; | |
651 | ||
652 | /* Examine all elements of the package object, remove nulls */ | |
653 | ||
654 | for (i = 0; i < count; i++) { | |
655 | if (!*source) { | |
656 | new_count--; | |
657 | } else { | |
658 | *dest = *source; | |
659 | dest++; | |
660 | } | |
661 | source++; | |
662 | } | |
663 | ||
664 | /* Update parent package if any null elements were removed */ | |
665 | ||
666 | if (new_count < count) { | |
667 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, | |
668 | "%s: Found and removed %u NULL elements\n", | |
669 | data->pathname, (count - new_count))); | |
670 | ||
671 | /* NULL terminate list and update the package count */ | |
672 | ||
673 | *dest = NULL; | |
674 | obj_desc->package.count = new_count; | |
675 | } | |
676 | } | |
677 | ||
e5f69d6e BM |
678 | /******************************************************************************* |
679 | * | |
680 | * FUNCTION: acpi_ns_repair_package_list | |
681 | * | |
682 | * PARAMETERS: Data - Pointer to validation data structure | |
683 | * obj_desc_ptr - Pointer to the object to repair. The new | |
684 | * package object is returned here, | |
685 | * overwriting the old object. | |
686 | * | |
687 | * RETURN: Status, new object in *obj_desc_ptr | |
688 | * | |
689 | * DESCRIPTION: Repair a common problem with objects that are defined to return | |
690 | * a variable-length Package of Packages. If the variable-length | |
691 | * is one, some BIOS code mistakenly simply declares a single | |
692 | * Package instead of a Package with one sub-Package. This | |
693 | * function attempts to repair this error by wrapping a Package | |
694 | * object around the original Package, creating the correct | |
695 | * Package with one sub-Package. | |
696 | * | |
697 | * Names that can be repaired in this manner include: | |
698 | * _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, TSS | |
699 | * | |
700 | ******************************************************************************/ | |
701 | ||
702 | acpi_status | |
703 | acpi_ns_repair_package_list(struct acpi_predefined_data *data, | |
704 | union acpi_operand_object **obj_desc_ptr) | |
705 | { | |
706 | union acpi_operand_object *pkg_obj_desc; | |
707 | ||
3a58176e BM |
708 | ACPI_FUNCTION_NAME(ns_repair_package_list); |
709 | ||
e5f69d6e BM |
710 | /* |
711 | * Create the new outer package and populate it. The new package will | |
712 | * have a single element, the lone subpackage. | |
713 | */ | |
714 | pkg_obj_desc = acpi_ut_create_package_object(1); | |
715 | if (!pkg_obj_desc) { | |
716 | return (AE_NO_MEMORY); | |
717 | } | |
718 | ||
719 | pkg_obj_desc->package.elements[0] = *obj_desc_ptr; | |
720 | ||
721 | /* Return the new object in the object pointer */ | |
722 | ||
723 | *obj_desc_ptr = pkg_obj_desc; | |
724 | data->flags |= ACPI_OBJECT_REPAIRED; | |
725 | ||
3a58176e BM |
726 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, |
727 | "%s: Repaired incorrectly formed Package\n", | |
728 | data->pathname)); | |
e5f69d6e BM |
729 | |
730 | return (AE_OK); | |
731 | } |