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1 | /****************************************************************************** | |
2 | * | |
3 | * Module Name: utcopy - Internal to external object translation utilities | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2017, Intel Corp. | |
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" | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_UTILITIES | |
50 | ACPI_MODULE_NAME("utcopy") | |
51 | ||
52 | /* Local prototypes */ | |
53 | static acpi_status | |
54 | acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object, | |
55 | union acpi_object *external_object, | |
56 | u8 *data_space, acpi_size *buffer_space_used); | |
57 | ||
58 | static acpi_status | |
59 | acpi_ut_copy_ielement_to_ielement(u8 object_type, | |
60 | union acpi_operand_object *source_object, | |
61 | union acpi_generic_state *state, | |
62 | void *context); | |
63 | ||
64 | static acpi_status | |
65 | acpi_ut_copy_ipackage_to_epackage(union acpi_operand_object *internal_object, | |
66 | u8 *buffer, acpi_size *space_used); | |
67 | ||
68 | static acpi_status | |
69 | acpi_ut_copy_esimple_to_isimple(union acpi_object *user_obj, | |
70 | union acpi_operand_object **return_obj); | |
71 | ||
72 | static acpi_status | |
73 | acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object, | |
74 | union acpi_operand_object **internal_object); | |
75 | ||
76 | static acpi_status | |
77 | acpi_ut_copy_simple_object(union acpi_operand_object *source_desc, | |
78 | union acpi_operand_object *dest_desc); | |
79 | ||
80 | static acpi_status | |
81 | acpi_ut_copy_ielement_to_eelement(u8 object_type, | |
82 | union acpi_operand_object *source_object, | |
83 | union acpi_generic_state *state, | |
84 | void *context); | |
85 | ||
86 | static acpi_status | |
87 | acpi_ut_copy_ipackage_to_ipackage(union acpi_operand_object *source_obj, | |
88 | union acpi_operand_object *dest_obj, | |
89 | struct acpi_walk_state *walk_state); | |
90 | ||
91 | /******************************************************************************* | |
92 | * | |
93 | * FUNCTION: acpi_ut_copy_isimple_to_esimple | |
94 | * | |
95 | * PARAMETERS: internal_object - Source object to be copied | |
96 | * external_object - Where to return the copied object | |
97 | * data_space - Where object data is returned (such as | |
98 | * buffer and string data) | |
99 | * buffer_space_used - Length of data_space that was used | |
100 | * | |
101 | * RETURN: Status | |
102 | * | |
103 | * DESCRIPTION: This function is called to copy a simple internal object to | |
104 | * an external object. | |
105 | * | |
106 | * The data_space buffer is assumed to have sufficient space for | |
107 | * the object. | |
108 | * | |
109 | ******************************************************************************/ | |
110 | ||
111 | static acpi_status | |
112 | acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object, | |
113 | union acpi_object *external_object, | |
114 | u8 *data_space, acpi_size *buffer_space_used) | |
115 | { | |
116 | acpi_status status = AE_OK; | |
117 | ||
118 | ACPI_FUNCTION_TRACE(ut_copy_isimple_to_esimple); | |
119 | ||
120 | *buffer_space_used = 0; | |
121 | ||
122 | /* | |
123 | * Check for NULL object case (could be an uninitialized | |
124 | * package element) | |
125 | */ | |
126 | if (!internal_object) { | |
127 | return_ACPI_STATUS(AE_OK); | |
128 | } | |
129 | ||
130 | /* Always clear the external object */ | |
131 | ||
132 | memset(external_object, 0, sizeof(union acpi_object)); | |
133 | ||
134 | /* | |
135 | * In general, the external object will be the same type as | |
136 | * the internal object | |
137 | */ | |
138 | external_object->type = internal_object->common.type; | |
139 | ||
140 | /* However, only a limited number of external types are supported */ | |
141 | ||
142 | switch (internal_object->common.type) { | |
143 | case ACPI_TYPE_STRING: | |
144 | ||
145 | external_object->string.pointer = (char *)data_space; | |
146 | external_object->string.length = internal_object->string.length; | |
147 | *buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD((acpi_size) | |
148 | internal_object-> | |
149 | string. | |
150 | length + 1); | |
151 | ||
152 | memcpy((void *)data_space, | |
153 | (void *)internal_object->string.pointer, | |
154 | (acpi_size)internal_object->string.length + 1); | |
155 | break; | |
156 | ||
157 | case ACPI_TYPE_BUFFER: | |
158 | ||
159 | external_object->buffer.pointer = data_space; | |
160 | external_object->buffer.length = internal_object->buffer.length; | |
161 | *buffer_space_used = | |
162 | ACPI_ROUND_UP_TO_NATIVE_WORD(internal_object->string. | |
163 | length); | |
164 | ||
165 | memcpy((void *)data_space, | |
166 | (void *)internal_object->buffer.pointer, | |
167 | internal_object->buffer.length); | |
168 | break; | |
169 | ||
170 | case ACPI_TYPE_INTEGER: | |
171 | ||
172 | external_object->integer.value = internal_object->integer.value; | |
173 | break; | |
174 | ||
175 | case ACPI_TYPE_LOCAL_REFERENCE: | |
176 | ||
177 | /* This is an object reference. */ | |
178 | ||
179 | switch (internal_object->reference.class) { | |
180 | case ACPI_REFCLASS_NAME: | |
181 | /* | |
182 | * For namepath, return the object handle ("reference") | |
183 | * We are referring to the namespace node | |
184 | */ | |
185 | external_object->reference.handle = | |
186 | internal_object->reference.node; | |
187 | external_object->reference.actual_type = | |
188 | acpi_ns_get_type(internal_object->reference.node); | |
189 | break; | |
190 | ||
191 | default: | |
192 | ||
193 | /* All other reference types are unsupported */ | |
194 | ||
195 | return_ACPI_STATUS(AE_TYPE); | |
196 | } | |
197 | break; | |
198 | ||
199 | case ACPI_TYPE_PROCESSOR: | |
200 | ||
201 | external_object->processor.proc_id = | |
202 | internal_object->processor.proc_id; | |
203 | external_object->processor.pblk_address = | |
204 | internal_object->processor.address; | |
205 | external_object->processor.pblk_length = | |
206 | internal_object->processor.length; | |
207 | break; | |
208 | ||
209 | case ACPI_TYPE_POWER: | |
210 | ||
211 | external_object->power_resource.system_level = | |
212 | internal_object->power_resource.system_level; | |
213 | ||
214 | external_object->power_resource.resource_order = | |
215 | internal_object->power_resource.resource_order; | |
216 | break; | |
217 | ||
218 | default: | |
219 | /* | |
220 | * There is no corresponding external object type | |
221 | */ | |
222 | ACPI_ERROR((AE_INFO, | |
223 | "Unsupported object type, cannot convert to external object: %s", | |
224 | acpi_ut_get_type_name(internal_object->common. | |
225 | type))); | |
226 | ||
227 | return_ACPI_STATUS(AE_SUPPORT); | |
228 | } | |
229 | ||
230 | return_ACPI_STATUS(status); | |
231 | } | |
232 | ||
233 | /******************************************************************************* | |
234 | * | |
235 | * FUNCTION: acpi_ut_copy_ielement_to_eelement | |
236 | * | |
237 | * PARAMETERS: acpi_pkg_callback | |
238 | * | |
239 | * RETURN: Status | |
240 | * | |
241 | * DESCRIPTION: Copy one package element to another package element | |
242 | * | |
243 | ******************************************************************************/ | |
244 | ||
245 | static acpi_status | |
246 | acpi_ut_copy_ielement_to_eelement(u8 object_type, | |
247 | union acpi_operand_object *source_object, | |
248 | union acpi_generic_state *state, | |
249 | void *context) | |
250 | { | |
251 | acpi_status status = AE_OK; | |
252 | struct acpi_pkg_info *info = (struct acpi_pkg_info *)context; | |
253 | acpi_size object_space; | |
254 | u32 this_index; | |
255 | union acpi_object *target_object; | |
256 | ||
257 | ACPI_FUNCTION_ENTRY(); | |
258 | ||
259 | this_index = state->pkg.index; | |
260 | target_object = (union acpi_object *)&((union acpi_object *) | |
261 | (state->pkg.dest_object))-> | |
262 | package.elements[this_index]; | |
263 | ||
264 | switch (object_type) { | |
265 | case ACPI_COPY_TYPE_SIMPLE: | |
266 | /* | |
267 | * This is a simple or null object | |
268 | */ | |
269 | status = acpi_ut_copy_isimple_to_esimple(source_object, | |
270 | target_object, | |
271 | info->free_space, | |
272 | &object_space); | |
273 | if (ACPI_FAILURE(status)) { | |
274 | return (status); | |
275 | } | |
276 | break; | |
277 | ||
278 | case ACPI_COPY_TYPE_PACKAGE: | |
279 | /* | |
280 | * Build the package object | |
281 | */ | |
282 | target_object->type = ACPI_TYPE_PACKAGE; | |
283 | target_object->package.count = source_object->package.count; | |
284 | target_object->package.elements = | |
285 | ACPI_CAST_PTR(union acpi_object, info->free_space); | |
286 | ||
287 | /* | |
288 | * Pass the new package object back to the package walk routine | |
289 | */ | |
290 | state->pkg.this_target_obj = target_object; | |
291 | ||
292 | /* | |
293 | * Save space for the array of objects (Package elements) | |
294 | * update the buffer length counter | |
295 | */ | |
296 | object_space = ACPI_ROUND_UP_TO_NATIVE_WORD((acpi_size) | |
297 | target_object-> | |
298 | package.count * | |
299 | sizeof(union | |
300 | acpi_object)); | |
301 | break; | |
302 | ||
303 | default: | |
304 | ||
305 | return (AE_BAD_PARAMETER); | |
306 | } | |
307 | ||
308 | info->free_space += object_space; | |
309 | info->length += object_space; | |
310 | return (status); | |
311 | } | |
312 | ||
313 | /******************************************************************************* | |
314 | * | |
315 | * FUNCTION: acpi_ut_copy_ipackage_to_epackage | |
316 | * | |
317 | * PARAMETERS: internal_object - Pointer to the object we are returning | |
318 | * buffer - Where the object is returned | |
319 | * space_used - Where the object length is returned | |
320 | * | |
321 | * RETURN: Status | |
322 | * | |
323 | * DESCRIPTION: This function is called to place a package object in a user | |
324 | * buffer. A package object by definition contains other objects. | |
325 | * | |
326 | * The buffer is assumed to have sufficient space for the object. | |
327 | * The caller must have verified the buffer length needed using | |
328 | * the acpi_ut_get_object_size function before calling this function. | |
329 | * | |
330 | ******************************************************************************/ | |
331 | ||
332 | static acpi_status | |
333 | acpi_ut_copy_ipackage_to_epackage(union acpi_operand_object *internal_object, | |
334 | u8 *buffer, acpi_size *space_used) | |
335 | { | |
336 | union acpi_object *external_object; | |
337 | acpi_status status; | |
338 | struct acpi_pkg_info info; | |
339 | ||
340 | ACPI_FUNCTION_TRACE(ut_copy_ipackage_to_epackage); | |
341 | ||
342 | /* | |
343 | * First package at head of the buffer | |
344 | */ | |
345 | external_object = ACPI_CAST_PTR(union acpi_object, buffer); | |
346 | ||
347 | /* | |
348 | * Free space begins right after the first package | |
349 | */ | |
350 | info.length = ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); | |
351 | info.free_space = buffer + | |
352 | ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); | |
353 | info.object_space = 0; | |
354 | info.num_packages = 1; | |
355 | ||
356 | external_object->type = internal_object->common.type; | |
357 | external_object->package.count = internal_object->package.count; | |
358 | external_object->package.elements = | |
359 | ACPI_CAST_PTR(union acpi_object, info.free_space); | |
360 | ||
361 | /* | |
362 | * Leave room for an array of ACPI_OBJECTS in the buffer | |
363 | * and move the free space past it | |
364 | */ | |
365 | info.length += (acpi_size)external_object->package.count * | |
366 | ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); | |
367 | info.free_space += external_object->package.count * | |
368 | ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); | |
369 | ||
370 | status = acpi_ut_walk_package_tree(internal_object, external_object, | |
371 | acpi_ut_copy_ielement_to_eelement, | |
372 | &info); | |
373 | ||
374 | *space_used = info.length; | |
375 | return_ACPI_STATUS(status); | |
376 | } | |
377 | ||
378 | /******************************************************************************* | |
379 | * | |
380 | * FUNCTION: acpi_ut_copy_iobject_to_eobject | |
381 | * | |
382 | * PARAMETERS: internal_object - The internal object to be converted | |
383 | * ret_buffer - Where the object is returned | |
384 | * | |
385 | * RETURN: Status | |
386 | * | |
387 | * DESCRIPTION: This function is called to build an API object to be returned | |
388 | * to the caller. | |
389 | * | |
390 | ******************************************************************************/ | |
391 | ||
392 | acpi_status | |
393 | acpi_ut_copy_iobject_to_eobject(union acpi_operand_object *internal_object, | |
394 | struct acpi_buffer *ret_buffer) | |
395 | { | |
396 | acpi_status status; | |
397 | ||
398 | ACPI_FUNCTION_TRACE(ut_copy_iobject_to_eobject); | |
399 | ||
400 | if (internal_object->common.type == ACPI_TYPE_PACKAGE) { | |
401 | /* | |
402 | * Package object: Copy all subobjects (including | |
403 | * nested packages) | |
404 | */ | |
405 | status = acpi_ut_copy_ipackage_to_epackage(internal_object, | |
406 | ret_buffer->pointer, | |
407 | &ret_buffer->length); | |
408 | } else { | |
409 | /* | |
410 | * Build a simple object (no nested objects) | |
411 | */ | |
412 | status = acpi_ut_copy_isimple_to_esimple(internal_object, | |
413 | ACPI_CAST_PTR(union | |
414 | acpi_object, | |
415 | ret_buffer-> | |
416 | pointer), | |
417 | ACPI_ADD_PTR(u8, | |
418 | ret_buffer-> | |
419 | pointer, | |
420 | ACPI_ROUND_UP_TO_NATIVE_WORD | |
421 | (sizeof | |
422 | (union | |
423 | acpi_object))), | |
424 | &ret_buffer->length); | |
425 | /* | |
426 | * build simple does not include the object size in the length | |
427 | * so we add it in here | |
428 | */ | |
429 | ret_buffer->length += sizeof(union acpi_object); | |
430 | } | |
431 | ||
432 | return_ACPI_STATUS(status); | |
433 | } | |
434 | ||
435 | /******************************************************************************* | |
436 | * | |
437 | * FUNCTION: acpi_ut_copy_esimple_to_isimple | |
438 | * | |
439 | * PARAMETERS: external_object - The external object to be converted | |
440 | * ret_internal_object - Where the internal object is returned | |
441 | * | |
442 | * RETURN: Status | |
443 | * | |
444 | * DESCRIPTION: This function copies an external object to an internal one. | |
445 | * NOTE: Pointers can be copied, we don't need to copy data. | |
446 | * (The pointers have to be valid in our address space no matter | |
447 | * what we do with them!) | |
448 | * | |
449 | ******************************************************************************/ | |
450 | ||
451 | static acpi_status | |
452 | acpi_ut_copy_esimple_to_isimple(union acpi_object *external_object, | |
453 | union acpi_operand_object **ret_internal_object) | |
454 | { | |
455 | union acpi_operand_object *internal_object; | |
456 | ||
457 | ACPI_FUNCTION_TRACE(ut_copy_esimple_to_isimple); | |
458 | ||
459 | /* | |
460 | * Simple types supported are: String, Buffer, Integer | |
461 | */ | |
462 | switch (external_object->type) { | |
463 | case ACPI_TYPE_STRING: | |
464 | case ACPI_TYPE_BUFFER: | |
465 | case ACPI_TYPE_INTEGER: | |
466 | case ACPI_TYPE_LOCAL_REFERENCE: | |
467 | ||
468 | internal_object = acpi_ut_create_internal_object((u8) | |
469 | external_object-> | |
470 | type); | |
471 | if (!internal_object) { | |
472 | return_ACPI_STATUS(AE_NO_MEMORY); | |
473 | } | |
474 | break; | |
475 | ||
476 | case ACPI_TYPE_ANY: /* This is the case for a NULL object */ | |
477 | ||
478 | *ret_internal_object = NULL; | |
479 | return_ACPI_STATUS(AE_OK); | |
480 | ||
481 | default: | |
482 | ||
483 | /* All other types are not supported */ | |
484 | ||
485 | ACPI_ERROR((AE_INFO, | |
486 | "Unsupported object type, cannot convert to internal object: %s", | |
487 | acpi_ut_get_type_name(external_object->type))); | |
488 | ||
489 | return_ACPI_STATUS(AE_SUPPORT); | |
490 | } | |
491 | ||
492 | /* Must COPY string and buffer contents */ | |
493 | ||
494 | switch (external_object->type) { | |
495 | case ACPI_TYPE_STRING: | |
496 | ||
497 | internal_object->string.pointer = | |
498 | ACPI_ALLOCATE_ZEROED((acpi_size) | |
499 | external_object->string.length + 1); | |
500 | ||
501 | if (!internal_object->string.pointer) { | |
502 | goto error_exit; | |
503 | } | |
504 | ||
505 | memcpy(internal_object->string.pointer, | |
506 | external_object->string.pointer, | |
507 | external_object->string.length); | |
508 | ||
509 | internal_object->string.length = external_object->string.length; | |
510 | break; | |
511 | ||
512 | case ACPI_TYPE_BUFFER: | |
513 | ||
514 | internal_object->buffer.pointer = | |
515 | ACPI_ALLOCATE_ZEROED(external_object->buffer.length); | |
516 | if (!internal_object->buffer.pointer) { | |
517 | goto error_exit; | |
518 | } | |
519 | ||
520 | memcpy(internal_object->buffer.pointer, | |
521 | external_object->buffer.pointer, | |
522 | external_object->buffer.length); | |
523 | ||
524 | internal_object->buffer.length = external_object->buffer.length; | |
525 | ||
526 | /* Mark buffer data valid */ | |
527 | ||
528 | internal_object->buffer.flags |= AOPOBJ_DATA_VALID; | |
529 | break; | |
530 | ||
531 | case ACPI_TYPE_INTEGER: | |
532 | ||
533 | internal_object->integer.value = external_object->integer.value; | |
534 | break; | |
535 | ||
536 | case ACPI_TYPE_LOCAL_REFERENCE: | |
537 | ||
538 | /* An incoming reference is defined to be a namespace node */ | |
539 | ||
540 | internal_object->reference.class = ACPI_REFCLASS_REFOF; | |
541 | internal_object->reference.object = | |
542 | external_object->reference.handle; | |
543 | break; | |
544 | ||
545 | default: | |
546 | ||
547 | /* Other types can't get here */ | |
548 | ||
549 | break; | |
550 | } | |
551 | ||
552 | *ret_internal_object = internal_object; | |
553 | return_ACPI_STATUS(AE_OK); | |
554 | ||
555 | error_exit: | |
556 | acpi_ut_remove_reference(internal_object); | |
557 | return_ACPI_STATUS(AE_NO_MEMORY); | |
558 | } | |
559 | ||
560 | /******************************************************************************* | |
561 | * | |
562 | * FUNCTION: acpi_ut_copy_epackage_to_ipackage | |
563 | * | |
564 | * PARAMETERS: external_object - The external object to be converted | |
565 | * internal_object - Where the internal object is returned | |
566 | * | |
567 | * RETURN: Status | |
568 | * | |
569 | * DESCRIPTION: Copy an external package object to an internal package. | |
570 | * Handles nested packages. | |
571 | * | |
572 | ******************************************************************************/ | |
573 | ||
574 | static acpi_status | |
575 | acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object, | |
576 | union acpi_operand_object **internal_object) | |
577 | { | |
578 | acpi_status status = AE_OK; | |
579 | union acpi_operand_object *package_object; | |
580 | union acpi_operand_object **package_elements; | |
581 | u32 i; | |
582 | ||
583 | ACPI_FUNCTION_TRACE(ut_copy_epackage_to_ipackage); | |
584 | ||
585 | /* Create the package object */ | |
586 | ||
587 | package_object = | |
588 | acpi_ut_create_package_object(external_object->package.count); | |
589 | if (!package_object) { | |
590 | return_ACPI_STATUS(AE_NO_MEMORY); | |
591 | } | |
592 | ||
593 | package_elements = package_object->package.elements; | |
594 | ||
595 | /* | |
596 | * Recursive implementation. Probably ok, since nested external | |
597 | * packages as parameters should be very rare. | |
598 | */ | |
599 | for (i = 0; i < external_object->package.count; i++) { | |
600 | status = | |
601 | acpi_ut_copy_eobject_to_iobject(&external_object->package. | |
602 | elements[i], | |
603 | &package_elements[i]); | |
604 | if (ACPI_FAILURE(status)) { | |
605 | ||
606 | /* Truncate package and delete it */ | |
607 | ||
608 | package_object->package.count = i; | |
609 | package_elements[i] = NULL; | |
610 | acpi_ut_remove_reference(package_object); | |
611 | return_ACPI_STATUS(status); | |
612 | } | |
613 | } | |
614 | ||
615 | /* Mark package data valid */ | |
616 | ||
617 | package_object->package.flags |= AOPOBJ_DATA_VALID; | |
618 | ||
619 | *internal_object = package_object; | |
620 | return_ACPI_STATUS(status); | |
621 | } | |
622 | ||
623 | /******************************************************************************* | |
624 | * | |
625 | * FUNCTION: acpi_ut_copy_eobject_to_iobject | |
626 | * | |
627 | * PARAMETERS: external_object - The external object to be converted | |
628 | * internal_object - Where the internal object is returned | |
629 | * | |
630 | * RETURN: Status | |
631 | * | |
632 | * DESCRIPTION: Converts an external object to an internal object. | |
633 | * | |
634 | ******************************************************************************/ | |
635 | ||
636 | acpi_status | |
637 | acpi_ut_copy_eobject_to_iobject(union acpi_object *external_object, | |
638 | union acpi_operand_object **internal_object) | |
639 | { | |
640 | acpi_status status; | |
641 | ||
642 | ACPI_FUNCTION_TRACE(ut_copy_eobject_to_iobject); | |
643 | ||
644 | if (external_object->type == ACPI_TYPE_PACKAGE) { | |
645 | status = | |
646 | acpi_ut_copy_epackage_to_ipackage(external_object, | |
647 | internal_object); | |
648 | } else { | |
649 | /* | |
650 | * Build a simple object (no nested objects) | |
651 | */ | |
652 | status = acpi_ut_copy_esimple_to_isimple(external_object, | |
653 | internal_object); | |
654 | } | |
655 | ||
656 | return_ACPI_STATUS(status); | |
657 | } | |
658 | ||
659 | /******************************************************************************* | |
660 | * | |
661 | * FUNCTION: acpi_ut_copy_simple_object | |
662 | * | |
663 | * PARAMETERS: source_desc - The internal object to be copied | |
664 | * dest_desc - New target object | |
665 | * | |
666 | * RETURN: Status | |
667 | * | |
668 | * DESCRIPTION: Simple copy of one internal object to another. Reference count | |
669 | * of the destination object is preserved. | |
670 | * | |
671 | ******************************************************************************/ | |
672 | ||
673 | static acpi_status | |
674 | acpi_ut_copy_simple_object(union acpi_operand_object *source_desc, | |
675 | union acpi_operand_object *dest_desc) | |
676 | { | |
677 | u16 reference_count; | |
678 | union acpi_operand_object *next_object; | |
679 | acpi_status status; | |
680 | acpi_size copy_size; | |
681 | ||
682 | /* Save fields from destination that we don't want to overwrite */ | |
683 | ||
684 | reference_count = dest_desc->common.reference_count; | |
685 | next_object = dest_desc->common.next_object; | |
686 | ||
687 | /* | |
688 | * Copy the entire source object over the destination object. | |
689 | * Note: Source can be either an operand object or namespace node. | |
690 | */ | |
691 | copy_size = sizeof(union acpi_operand_object); | |
692 | if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_NAMED) { | |
693 | copy_size = sizeof(struct acpi_namespace_node); | |
694 | } | |
695 | ||
696 | memcpy(ACPI_CAST_PTR(char, dest_desc), | |
697 | ACPI_CAST_PTR(char, source_desc), copy_size); | |
698 | ||
699 | /* Restore the saved fields */ | |
700 | ||
701 | dest_desc->common.reference_count = reference_count; | |
702 | dest_desc->common.next_object = next_object; | |
703 | ||
704 | /* New object is not static, regardless of source */ | |
705 | ||
706 | dest_desc->common.flags &= ~AOPOBJ_STATIC_POINTER; | |
707 | ||
708 | /* Handle the objects with extra data */ | |
709 | ||
710 | switch (dest_desc->common.type) { | |
711 | case ACPI_TYPE_BUFFER: | |
712 | /* | |
713 | * Allocate and copy the actual buffer if and only if: | |
714 | * 1) There is a valid buffer pointer | |
715 | * 2) The buffer has a length > 0 | |
716 | */ | |
717 | if ((source_desc->buffer.pointer) && | |
718 | (source_desc->buffer.length)) { | |
719 | dest_desc->buffer.pointer = | |
720 | ACPI_ALLOCATE(source_desc->buffer.length); | |
721 | if (!dest_desc->buffer.pointer) { | |
722 | return (AE_NO_MEMORY); | |
723 | } | |
724 | ||
725 | /* Copy the actual buffer data */ | |
726 | ||
727 | memcpy(dest_desc->buffer.pointer, | |
728 | source_desc->buffer.pointer, | |
729 | source_desc->buffer.length); | |
730 | } | |
731 | break; | |
732 | ||
733 | case ACPI_TYPE_STRING: | |
734 | /* | |
735 | * Allocate and copy the actual string if and only if: | |
736 | * 1) There is a valid string pointer | |
737 | * (Pointer to a NULL string is allowed) | |
738 | */ | |
739 | if (source_desc->string.pointer) { | |
740 | dest_desc->string.pointer = | |
741 | ACPI_ALLOCATE((acpi_size)source_desc->string. | |
742 | length + 1); | |
743 | if (!dest_desc->string.pointer) { | |
744 | return (AE_NO_MEMORY); | |
745 | } | |
746 | ||
747 | /* Copy the actual string data */ | |
748 | ||
749 | memcpy(dest_desc->string.pointer, | |
750 | source_desc->string.pointer, | |
751 | (acpi_size)source_desc->string.length + 1); | |
752 | } | |
753 | break; | |
754 | ||
755 | case ACPI_TYPE_LOCAL_REFERENCE: | |
756 | /* | |
757 | * We copied the reference object, so we now must add a reference | |
758 | * to the object pointed to by the reference | |
759 | * | |
760 | * DDBHandle reference (from Load/load_table) is a special reference, | |
761 | * it does not have a Reference.Object, so does not need to | |
762 | * increase the reference count | |
763 | */ | |
764 | if (source_desc->reference.class == ACPI_REFCLASS_TABLE) { | |
765 | break; | |
766 | } | |
767 | ||
768 | acpi_ut_add_reference(source_desc->reference.object); | |
769 | break; | |
770 | ||
771 | case ACPI_TYPE_REGION: | |
772 | /* | |
773 | * We copied the Region Handler, so we now must add a reference | |
774 | */ | |
775 | if (dest_desc->region.handler) { | |
776 | acpi_ut_add_reference(dest_desc->region.handler); | |
777 | } | |
778 | break; | |
779 | ||
780 | /* | |
781 | * For Mutex and Event objects, we cannot simply copy the underlying | |
782 | * OS object. We must create a new one. | |
783 | */ | |
784 | case ACPI_TYPE_MUTEX: | |
785 | ||
786 | status = acpi_os_create_mutex(&dest_desc->mutex.os_mutex); | |
787 | if (ACPI_FAILURE(status)) { | |
788 | return (status); | |
789 | } | |
790 | break; | |
791 | ||
792 | case ACPI_TYPE_EVENT: | |
793 | ||
794 | status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, | |
795 | &dest_desc->event. | |
796 | os_semaphore); | |
797 | if (ACPI_FAILURE(status)) { | |
798 | return (status); | |
799 | } | |
800 | break; | |
801 | ||
802 | default: | |
803 | ||
804 | /* Nothing to do for other simple objects */ | |
805 | ||
806 | break; | |
807 | } | |
808 | ||
809 | return (AE_OK); | |
810 | } | |
811 | ||
812 | /******************************************************************************* | |
813 | * | |
814 | * FUNCTION: acpi_ut_copy_ielement_to_ielement | |
815 | * | |
816 | * PARAMETERS: acpi_pkg_callback | |
817 | * | |
818 | * RETURN: Status | |
819 | * | |
820 | * DESCRIPTION: Copy one package element to another package element | |
821 | * | |
822 | ******************************************************************************/ | |
823 | ||
824 | static acpi_status | |
825 | acpi_ut_copy_ielement_to_ielement(u8 object_type, | |
826 | union acpi_operand_object *source_object, | |
827 | union acpi_generic_state *state, | |
828 | void *context) | |
829 | { | |
830 | acpi_status status = AE_OK; | |
831 | u32 this_index; | |
832 | union acpi_operand_object **this_target_ptr; | |
833 | union acpi_operand_object *target_object; | |
834 | ||
835 | ACPI_FUNCTION_ENTRY(); | |
836 | ||
837 | this_index = state->pkg.index; | |
838 | this_target_ptr = (union acpi_operand_object **) | |
839 | &state->pkg.dest_object->package.elements[this_index]; | |
840 | ||
841 | switch (object_type) { | |
842 | case ACPI_COPY_TYPE_SIMPLE: | |
843 | ||
844 | /* A null source object indicates a (legal) null package element */ | |
845 | ||
846 | if (source_object) { | |
847 | /* | |
848 | * This is a simple object, just copy it | |
849 | */ | |
850 | target_object = | |
851 | acpi_ut_create_internal_object(source_object-> | |
852 | common.type); | |
853 | if (!target_object) { | |
854 | return (AE_NO_MEMORY); | |
855 | } | |
856 | ||
857 | status = | |
858 | acpi_ut_copy_simple_object(source_object, | |
859 | target_object); | |
860 | if (ACPI_FAILURE(status)) { | |
861 | goto error_exit; | |
862 | } | |
863 | ||
864 | *this_target_ptr = target_object; | |
865 | } else { | |
866 | /* Pass through a null element */ | |
867 | ||
868 | *this_target_ptr = NULL; | |
869 | } | |
870 | break; | |
871 | ||
872 | case ACPI_COPY_TYPE_PACKAGE: | |
873 | /* | |
874 | * This object is a package - go down another nesting level | |
875 | * Create and build the package object | |
876 | */ | |
877 | target_object = | |
878 | acpi_ut_create_package_object(source_object->package.count); | |
879 | if (!target_object) { | |
880 | return (AE_NO_MEMORY); | |
881 | } | |
882 | ||
883 | target_object->common.flags = source_object->common.flags; | |
884 | ||
885 | /* Pass the new package object back to the package walk routine */ | |
886 | ||
887 | state->pkg.this_target_obj = target_object; | |
888 | ||
889 | /* Store the object pointer in the parent package object */ | |
890 | ||
891 | *this_target_ptr = target_object; | |
892 | break; | |
893 | ||
894 | default: | |
895 | ||
896 | return (AE_BAD_PARAMETER); | |
897 | } | |
898 | ||
899 | return (status); | |
900 | ||
901 | error_exit: | |
902 | acpi_ut_remove_reference(target_object); | |
903 | return (status); | |
904 | } | |
905 | ||
906 | /******************************************************************************* | |
907 | * | |
908 | * FUNCTION: acpi_ut_copy_ipackage_to_ipackage | |
909 | * | |
910 | * PARAMETERS: source_obj - Pointer to the source package object | |
911 | * dest_obj - Where the internal object is returned | |
912 | * walk_state - Current Walk state descriptor | |
913 | * | |
914 | * RETURN: Status | |
915 | * | |
916 | * DESCRIPTION: This function is called to copy an internal package object | |
917 | * into another internal package object. | |
918 | * | |
919 | ******************************************************************************/ | |
920 | ||
921 | static acpi_status | |
922 | acpi_ut_copy_ipackage_to_ipackage(union acpi_operand_object *source_obj, | |
923 | union acpi_operand_object *dest_obj, | |
924 | struct acpi_walk_state *walk_state) | |
925 | { | |
926 | acpi_status status = AE_OK; | |
927 | ||
928 | ACPI_FUNCTION_TRACE(ut_copy_ipackage_to_ipackage); | |
929 | ||
930 | dest_obj->common.type = source_obj->common.type; | |
931 | dest_obj->common.flags = source_obj->common.flags; | |
932 | dest_obj->package.count = source_obj->package.count; | |
933 | ||
934 | /* | |
935 | * Create the object array and walk the source package tree | |
936 | */ | |
937 | dest_obj->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size) | |
938 | source_obj->package. | |
939 | count + | |
940 | 1) * sizeof(void *)); | |
941 | if (!dest_obj->package.elements) { | |
942 | ACPI_ERROR((AE_INFO, "Package allocation failure")); | |
943 | return_ACPI_STATUS(AE_NO_MEMORY); | |
944 | } | |
945 | ||
946 | /* | |
947 | * Copy the package element-by-element by walking the package "tree". | |
948 | * This handles nested packages of arbitrary depth. | |
949 | */ | |
950 | status = acpi_ut_walk_package_tree(source_obj, dest_obj, | |
951 | acpi_ut_copy_ielement_to_ielement, | |
952 | walk_state); | |
953 | if (ACPI_FAILURE(status)) { | |
954 | ||
955 | /* On failure, delete the destination package object */ | |
956 | ||
957 | acpi_ut_remove_reference(dest_obj); | |
958 | } | |
959 | ||
960 | return_ACPI_STATUS(status); | |
961 | } | |
962 | ||
963 | /******************************************************************************* | |
964 | * | |
965 | * FUNCTION: acpi_ut_copy_iobject_to_iobject | |
966 | * | |
967 | * PARAMETERS: source_desc - The internal object to be copied | |
968 | * dest_desc - Where the copied object is returned | |
969 | * walk_state - Current walk state | |
970 | * | |
971 | * RETURN: Status | |
972 | * | |
973 | * DESCRIPTION: Copy an internal object to a new internal object | |
974 | * | |
975 | ******************************************************************************/ | |
976 | ||
977 | acpi_status | |
978 | acpi_ut_copy_iobject_to_iobject(union acpi_operand_object *source_desc, | |
979 | union acpi_operand_object **dest_desc, | |
980 | struct acpi_walk_state *walk_state) | |
981 | { | |
982 | acpi_status status = AE_OK; | |
983 | ||
984 | ACPI_FUNCTION_TRACE(ut_copy_iobject_to_iobject); | |
985 | ||
986 | /* Create the top level object */ | |
987 | ||
988 | *dest_desc = acpi_ut_create_internal_object(source_desc->common.type); | |
989 | if (!*dest_desc) { | |
990 | return_ACPI_STATUS(AE_NO_MEMORY); | |
991 | } | |
992 | ||
993 | /* Copy the object and possible subobjects */ | |
994 | ||
995 | if (source_desc->common.type == ACPI_TYPE_PACKAGE) { | |
996 | status = | |
997 | acpi_ut_copy_ipackage_to_ipackage(source_desc, *dest_desc, | |
998 | walk_state); | |
999 | } else { | |
1000 | status = acpi_ut_copy_simple_object(source_desc, *dest_desc); | |
1001 | } | |
1002 | ||
1003 | /* Delete the allocated object if copy failed */ | |
1004 | ||
1005 | if (ACPI_FAILURE(status)) { | |
1006 | acpi_ut_remove_reference(*dest_desc); | |
1007 | } | |
1008 | ||
1009 | return_ACPI_STATUS(status); | |
1010 | } |