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Merge tag 'v3.9-rc3' into drm-intel-next-queued
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpica / exresop.c
1 /******************************************************************************
2 *
3 * Module Name: exresop - AML Interpreter operand/object resolution
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, 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 "amlcode.h"
47 #include "acparser.h"
48 #include "acinterp.h"
49 #include "acnamesp.h"
50
51 #define _COMPONENT ACPI_EXECUTER
52 ACPI_MODULE_NAME("exresop")
53
54 /* Local prototypes */
55 static acpi_status
56 acpi_ex_check_object_type(acpi_object_type type_needed,
57 acpi_object_type this_type, void *object);
58
59 /*******************************************************************************
60 *
61 * FUNCTION: acpi_ex_check_object_type
62 *
63 * PARAMETERS: type_needed Object type needed
64 * this_type Actual object type
65 * Object Object pointer
66 *
67 * RETURN: Status
68 *
69 * DESCRIPTION: Check required type against actual type
70 *
71 ******************************************************************************/
72
73 static acpi_status
74 acpi_ex_check_object_type(acpi_object_type type_needed,
75 acpi_object_type this_type, void *object)
76 {
77 ACPI_FUNCTION_ENTRY();
78
79 if (type_needed == ACPI_TYPE_ANY) {
80
81 /* All types OK, so we don't perform any typechecks */
82
83 return (AE_OK);
84 }
85
86 if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
87 /*
88 * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
89 * objects and thus allow them to be targets. (As per the ACPI
90 * specification, a store to a constant is a noop.)
91 */
92 if ((this_type == ACPI_TYPE_INTEGER) &&
93 (((union acpi_operand_object *)object)->common.
94 flags & AOPOBJ_AML_CONSTANT)) {
95 return (AE_OK);
96 }
97 }
98
99 if (type_needed != this_type) {
100 ACPI_ERROR((AE_INFO,
101 "Needed type [%s], found [%s] %p",
102 acpi_ut_get_type_name(type_needed),
103 acpi_ut_get_type_name(this_type), object));
104
105 return (AE_AML_OPERAND_TYPE);
106 }
107
108 return (AE_OK);
109 }
110
111 /*******************************************************************************
112 *
113 * FUNCTION: acpi_ex_resolve_operands
114 *
115 * PARAMETERS: opcode - Opcode being interpreted
116 * stack_ptr - Pointer to the operand stack to be
117 * resolved
118 * walk_state - Current state
119 *
120 * RETURN: Status
121 *
122 * DESCRIPTION: Convert multiple input operands to the types required by the
123 * target operator.
124 *
125 * Each 5-bit group in arg_types represents one required
126 * operand and indicates the required Type. The corresponding operand
127 * will be converted to the required type if possible, otherwise we
128 * abort with an exception.
129 *
130 ******************************************************************************/
131
132 acpi_status
133 acpi_ex_resolve_operands(u16 opcode,
134 union acpi_operand_object ** stack_ptr,
135 struct acpi_walk_state * walk_state)
136 {
137 union acpi_operand_object *obj_desc;
138 acpi_status status = AE_OK;
139 u8 object_type;
140 u32 arg_types;
141 const struct acpi_opcode_info *op_info;
142 u32 this_arg_type;
143 acpi_object_type type_needed;
144 u16 target_op = 0;
145
146 ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode);
147
148 op_info = acpi_ps_get_opcode_info(opcode);
149 if (op_info->class == AML_CLASS_UNKNOWN) {
150 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
151 }
152
153 arg_types = op_info->runtime_args;
154 if (arg_types == ARGI_INVALID_OPCODE) {
155 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode));
156
157 return_ACPI_STATUS(AE_AML_INTERNAL);
158 }
159
160 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
161 "Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
162 opcode, op_info->name, arg_types));
163
164 /*
165 * Normal exit is with (arg_types == 0) at end of argument list.
166 * Function will return an exception from within the loop upon
167 * finding an entry which is not (or cannot be converted
168 * to) the required type; if stack underflows; or upon
169 * finding a NULL stack entry (which should not happen).
170 */
171 while (GET_CURRENT_ARG_TYPE(arg_types)) {
172 if (!stack_ptr || !*stack_ptr) {
173 ACPI_ERROR((AE_INFO, "Null stack entry at %p",
174 stack_ptr));
175
176 return_ACPI_STATUS(AE_AML_INTERNAL);
177 }
178
179 /* Extract useful items */
180
181 obj_desc = *stack_ptr;
182
183 /* Decode the descriptor type */
184
185 switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
186 case ACPI_DESC_TYPE_NAMED:
187
188 /* Namespace Node */
189
190 object_type =
191 ((struct acpi_namespace_node *)obj_desc)->type;
192
193 /*
194 * Resolve an alias object. The construction of these objects
195 * guarantees that there is only one level of alias indirection;
196 * thus, the attached object is always the aliased namespace node
197 */
198 if (object_type == ACPI_TYPE_LOCAL_ALIAS) {
199 obj_desc =
200 acpi_ns_get_attached_object((struct
201 acpi_namespace_node
202 *)obj_desc);
203 *stack_ptr = obj_desc;
204 object_type =
205 ((struct acpi_namespace_node *)obj_desc)->
206 type;
207 }
208 break;
209
210 case ACPI_DESC_TYPE_OPERAND:
211
212 /* ACPI internal object */
213
214 object_type = obj_desc->common.type;
215
216 /* Check for bad acpi_object_type */
217
218 if (!acpi_ut_valid_object_type(object_type)) {
219 ACPI_ERROR((AE_INFO,
220 "Bad operand object type [0x%X]",
221 object_type));
222
223 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
224 }
225
226 if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
227
228 /* Validate the Reference */
229
230 switch (obj_desc->reference.class) {
231 case ACPI_REFCLASS_DEBUG:
232
233 target_op = AML_DEBUG_OP;
234
235 /*lint -fallthrough */
236
237 case ACPI_REFCLASS_ARG:
238 case ACPI_REFCLASS_LOCAL:
239 case ACPI_REFCLASS_INDEX:
240 case ACPI_REFCLASS_REFOF:
241 case ACPI_REFCLASS_TABLE: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
242 case ACPI_REFCLASS_NAME: /* Reference to a named object */
243
244 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
245 "Operand is a Reference, Class [%s] %2.2X\n",
246 acpi_ut_get_reference_name
247 (obj_desc),
248 obj_desc->reference.
249 class));
250 break;
251
252 default:
253
254 ACPI_ERROR((AE_INFO,
255 "Unknown Reference Class 0x%2.2X in %p",
256 obj_desc->reference.class,
257 obj_desc));
258
259 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
260 }
261 }
262 break;
263
264 default:
265
266 /* Invalid descriptor */
267
268 ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]",
269 obj_desc,
270 acpi_ut_get_descriptor_name(obj_desc)));
271
272 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
273 }
274
275 /* Get one argument type, point to the next */
276
277 this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
278 INCREMENT_ARG_LIST(arg_types);
279
280 /*
281 * Handle cases where the object does not need to be
282 * resolved to a value
283 */
284 switch (this_arg_type) {
285 case ARGI_REF_OR_STRING: /* Can be a String or Reference */
286
287 if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
288 ACPI_DESC_TYPE_OPERAND)
289 && (obj_desc->common.type == ACPI_TYPE_STRING)) {
290 /*
291 * String found - the string references a named object and
292 * must be resolved to a node
293 */
294 goto next_operand;
295 }
296
297 /*
298 * Else not a string - fall through to the normal Reference
299 * case below
300 */
301 /*lint -fallthrough */
302
303 case ARGI_REFERENCE: /* References: */
304 case ARGI_INTEGER_REF:
305 case ARGI_OBJECT_REF:
306 case ARGI_DEVICE_REF:
307 case ARGI_TARGETREF: /* Allows implicit conversion rules before store */
308 case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
309 case ARGI_SIMPLE_TARGET: /* Name, Local, or arg - no implicit conversion */
310
311 /*
312 * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
313 * A Namespace Node is OK as-is
314 */
315 if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
316 ACPI_DESC_TYPE_NAMED) {
317 goto next_operand;
318 }
319
320 status =
321 acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
322 object_type, obj_desc);
323 if (ACPI_FAILURE(status)) {
324 return_ACPI_STATUS(status);
325 }
326 goto next_operand;
327
328 case ARGI_DATAREFOBJ: /* Store operator only */
329
330 /*
331 * We don't want to resolve index_op reference objects during
332 * a store because this would be an implicit de_ref_of operation.
333 * Instead, we just want to store the reference object.
334 * -- All others must be resolved below.
335 */
336 if ((opcode == AML_STORE_OP) &&
337 ((*stack_ptr)->common.type ==
338 ACPI_TYPE_LOCAL_REFERENCE)
339 && ((*stack_ptr)->reference.class ==
340 ACPI_REFCLASS_INDEX)) {
341 goto next_operand;
342 }
343 break;
344
345 default:
346 /* All cases covered above */
347 break;
348 }
349
350 /*
351 * Resolve this object to a value
352 */
353 status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
354 if (ACPI_FAILURE(status)) {
355 return_ACPI_STATUS(status);
356 }
357
358 /* Get the resolved object */
359
360 obj_desc = *stack_ptr;
361
362 /*
363 * Check the resulting object (value) type
364 */
365 switch (this_arg_type) {
366 /*
367 * For the simple cases, only one type of resolved object
368 * is allowed
369 */
370 case ARGI_MUTEX:
371
372 /* Need an operand of type ACPI_TYPE_MUTEX */
373
374 type_needed = ACPI_TYPE_MUTEX;
375 break;
376
377 case ARGI_EVENT:
378
379 /* Need an operand of type ACPI_TYPE_EVENT */
380
381 type_needed = ACPI_TYPE_EVENT;
382 break;
383
384 case ARGI_PACKAGE: /* Package */
385
386 /* Need an operand of type ACPI_TYPE_PACKAGE */
387
388 type_needed = ACPI_TYPE_PACKAGE;
389 break;
390
391 case ARGI_ANYTYPE:
392
393 /* Any operand type will do */
394
395 type_needed = ACPI_TYPE_ANY;
396 break;
397
398 case ARGI_DDBHANDLE:
399
400 /* Need an operand of type ACPI_TYPE_DDB_HANDLE */
401
402 type_needed = ACPI_TYPE_LOCAL_REFERENCE;
403 break;
404
405 /*
406 * The more complex cases allow multiple resolved object types
407 */
408 case ARGI_INTEGER:
409
410 /*
411 * Need an operand of type ACPI_TYPE_INTEGER,
412 * But we can implicitly convert from a STRING or BUFFER
413 * aka - "Implicit Source Operand Conversion"
414 */
415 status =
416 acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
417 if (ACPI_FAILURE(status)) {
418 if (status == AE_TYPE) {
419 ACPI_ERROR((AE_INFO,
420 "Needed [Integer/String/Buffer], found [%s] %p",
421 acpi_ut_get_object_type_name
422 (obj_desc), obj_desc));
423
424 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
425 }
426
427 return_ACPI_STATUS(status);
428 }
429
430 if (obj_desc != *stack_ptr) {
431 acpi_ut_remove_reference(obj_desc);
432 }
433 goto next_operand;
434
435 case ARGI_BUFFER:
436
437 /*
438 * Need an operand of type ACPI_TYPE_BUFFER,
439 * But we can implicitly convert from a STRING or INTEGER
440 * aka - "Implicit Source Operand Conversion"
441 */
442 status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
443 if (ACPI_FAILURE(status)) {
444 if (status == AE_TYPE) {
445 ACPI_ERROR((AE_INFO,
446 "Needed [Integer/String/Buffer], found [%s] %p",
447 acpi_ut_get_object_type_name
448 (obj_desc), obj_desc));
449
450 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
451 }
452
453 return_ACPI_STATUS(status);
454 }
455
456 if (obj_desc != *stack_ptr) {
457 acpi_ut_remove_reference(obj_desc);
458 }
459 goto next_operand;
460
461 case ARGI_STRING:
462
463 /*
464 * Need an operand of type ACPI_TYPE_STRING,
465 * But we can implicitly convert from a BUFFER or INTEGER
466 * aka - "Implicit Source Operand Conversion"
467 */
468 status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
469 ACPI_IMPLICIT_CONVERT_HEX);
470 if (ACPI_FAILURE(status)) {
471 if (status == AE_TYPE) {
472 ACPI_ERROR((AE_INFO,
473 "Needed [Integer/String/Buffer], found [%s] %p",
474 acpi_ut_get_object_type_name
475 (obj_desc), obj_desc));
476
477 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
478 }
479
480 return_ACPI_STATUS(status);
481 }
482
483 if (obj_desc != *stack_ptr) {
484 acpi_ut_remove_reference(obj_desc);
485 }
486 goto next_operand;
487
488 case ARGI_COMPUTEDATA:
489
490 /* Need an operand of type INTEGER, STRING or BUFFER */
491
492 switch (obj_desc->common.type) {
493 case ACPI_TYPE_INTEGER:
494 case ACPI_TYPE_STRING:
495 case ACPI_TYPE_BUFFER:
496
497 /* Valid operand */
498 break;
499
500 default:
501 ACPI_ERROR((AE_INFO,
502 "Needed [Integer/String/Buffer], found [%s] %p",
503 acpi_ut_get_object_type_name
504 (obj_desc), obj_desc));
505
506 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
507 }
508 goto next_operand;
509
510 case ARGI_BUFFER_OR_STRING:
511
512 /* Need an operand of type STRING or BUFFER */
513
514 switch (obj_desc->common.type) {
515 case ACPI_TYPE_STRING:
516 case ACPI_TYPE_BUFFER:
517
518 /* Valid operand */
519 break;
520
521 case ACPI_TYPE_INTEGER:
522
523 /* Highest priority conversion is to type Buffer */
524
525 status =
526 acpi_ex_convert_to_buffer(obj_desc,
527 stack_ptr);
528 if (ACPI_FAILURE(status)) {
529 return_ACPI_STATUS(status);
530 }
531
532 if (obj_desc != *stack_ptr) {
533 acpi_ut_remove_reference(obj_desc);
534 }
535 break;
536
537 default:
538 ACPI_ERROR((AE_INFO,
539 "Needed [Integer/String/Buffer], found [%s] %p",
540 acpi_ut_get_object_type_name
541 (obj_desc), obj_desc));
542
543 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
544 }
545 goto next_operand;
546
547 case ARGI_DATAOBJECT:
548 /*
549 * ARGI_DATAOBJECT is only used by the size_of operator.
550 * Need a buffer, string, package, or ref_of reference.
551 *
552 * The only reference allowed here is a direct reference to
553 * a namespace node.
554 */
555 switch (obj_desc->common.type) {
556 case ACPI_TYPE_PACKAGE:
557 case ACPI_TYPE_STRING:
558 case ACPI_TYPE_BUFFER:
559 case ACPI_TYPE_LOCAL_REFERENCE:
560
561 /* Valid operand */
562 break;
563
564 default:
565 ACPI_ERROR((AE_INFO,
566 "Needed [Buffer/String/Package/Reference], found [%s] %p",
567 acpi_ut_get_object_type_name
568 (obj_desc), obj_desc));
569
570 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
571 }
572 goto next_operand;
573
574 case ARGI_COMPLEXOBJ:
575
576 /* Need a buffer or package or (ACPI 2.0) String */
577
578 switch (obj_desc->common.type) {
579 case ACPI_TYPE_PACKAGE:
580 case ACPI_TYPE_STRING:
581 case ACPI_TYPE_BUFFER:
582
583 /* Valid operand */
584 break;
585
586 default:
587 ACPI_ERROR((AE_INFO,
588 "Needed [Buffer/String/Package], found [%s] %p",
589 acpi_ut_get_object_type_name
590 (obj_desc), obj_desc));
591
592 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
593 }
594 goto next_operand;
595
596 case ARGI_REGION_OR_BUFFER: /* Used by Load() only */
597
598 /* Need an operand of type REGION or a BUFFER (which could be a resolved region field) */
599
600 switch (obj_desc->common.type) {
601 case ACPI_TYPE_BUFFER:
602 case ACPI_TYPE_REGION:
603
604 /* Valid operand */
605 break;
606
607 default:
608 ACPI_ERROR((AE_INFO,
609 "Needed [Region/Buffer], found [%s] %p",
610 acpi_ut_get_object_type_name
611 (obj_desc), obj_desc));
612
613 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
614 }
615 goto next_operand;
616
617 case ARGI_DATAREFOBJ:
618
619 /* Used by the Store() operator only */
620
621 switch (obj_desc->common.type) {
622 case ACPI_TYPE_INTEGER:
623 case ACPI_TYPE_PACKAGE:
624 case ACPI_TYPE_STRING:
625 case ACPI_TYPE_BUFFER:
626 case ACPI_TYPE_BUFFER_FIELD:
627 case ACPI_TYPE_LOCAL_REFERENCE:
628 case ACPI_TYPE_LOCAL_REGION_FIELD:
629 case ACPI_TYPE_LOCAL_BANK_FIELD:
630 case ACPI_TYPE_LOCAL_INDEX_FIELD:
631 case ACPI_TYPE_DDB_HANDLE:
632
633 /* Valid operand */
634 break;
635
636 default:
637
638 if (acpi_gbl_enable_interpreter_slack) {
639 /*
640 * Enable original behavior of Store(), allowing any and all
641 * objects as the source operand. The ACPI spec does not
642 * allow this, however.
643 */
644 break;
645 }
646
647 if (target_op == AML_DEBUG_OP) {
648
649 /* Allow store of any object to the Debug object */
650
651 break;
652 }
653
654 ACPI_ERROR((AE_INFO,
655 "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p",
656 acpi_ut_get_object_type_name
657 (obj_desc), obj_desc));
658
659 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
660 }
661 goto next_operand;
662
663 default:
664
665 /* Unknown type */
666
667 ACPI_ERROR((AE_INFO,
668 "Internal - Unknown ARGI (required operand) type 0x%X",
669 this_arg_type));
670
671 return_ACPI_STATUS(AE_BAD_PARAMETER);
672 }
673
674 /*
675 * Make sure that the original object was resolved to the
676 * required object type (Simple cases only).
677 */
678 status = acpi_ex_check_object_type(type_needed,
679 (*stack_ptr)->common.type,
680 *stack_ptr);
681 if (ACPI_FAILURE(status)) {
682 return_ACPI_STATUS(status);
683 }
684
685 next_operand:
686 /*
687 * If more operands needed, decrement stack_ptr to point
688 * to next operand on stack
689 */
690 if (GET_CURRENT_ARG_TYPE(arg_types)) {
691 stack_ptr--;
692 }
693 }
694
695 ACPI_DUMP_OPERANDS(walk_state->operands,
696 acpi_ps_get_opcode_name(opcode),
697 walk_state->num_operands);
698
699 return_ACPI_STATUS(status);
700 }
kernel source for telekom puls (alcatel/mediatek)