Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing | |
4 | * parents and siblings and Scope manipulation | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
77848130 | 9 | * Copyright (C) 2000 - 2012, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acnamesp.h" | |
48 | #include "amlcode.h" | |
49 | #include "actables.h" | |
1da177e4 LT |
50 | |
51 | #define _COMPONENT ACPI_NAMESPACE | |
4be44fcd | 52 | ACPI_MODULE_NAME("nsutils") |
1da177e4 | 53 | |
44f6c012 | 54 | /* Local prototypes */ |
4be44fcd | 55 | static u8 acpi_ns_valid_path_separator(char sep); |
44f6c012 RM |
56 | |
57 | #ifdef ACPI_OBSOLETE_FUNCTIONS | |
4be44fcd | 58 | acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search); |
44f6c012 RM |
59 | #endif |
60 | ||
1da177e4 LT |
61 | /******************************************************************************* |
62 | * | |
63 | * FUNCTION: acpi_ns_print_node_pathname | |
64 | * | |
ba494bee BM |
65 | * PARAMETERS: node - Object |
66 | * message - Prefix message | |
1da177e4 LT |
67 | * |
68 | * DESCRIPTION: Print an object's full namespace pathname | |
69 | * Manages allocation/freeing of a pathname buffer | |
70 | * | |
71 | ******************************************************************************/ | |
72 | ||
73 | void | |
4b8ed631 BM |
74 | acpi_ns_print_node_pathname(struct acpi_namespace_node *node, |
75 | const char *message) | |
1da177e4 | 76 | { |
4be44fcd LB |
77 | struct acpi_buffer buffer; |
78 | acpi_status status; | |
1da177e4 LT |
79 | |
80 | if (!node) { | |
4be44fcd | 81 | acpi_os_printf("[NULL NAME]"); |
1da177e4 LT |
82 | return; |
83 | } | |
84 | ||
85 | /* Convert handle to full pathname and print it (with supplied message) */ | |
86 | ||
87 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; | |
88 | ||
4be44fcd LB |
89 | status = acpi_ns_handle_to_pathname(node, &buffer); |
90 | if (ACPI_SUCCESS(status)) { | |
44f6c012 | 91 | if (message) { |
4be44fcd | 92 | acpi_os_printf("%s ", message); |
1da177e4 LT |
93 | } |
94 | ||
4be44fcd | 95 | acpi_os_printf("[%s] (Node %p)", (char *)buffer.pointer, node); |
8313524a | 96 | ACPI_FREE(buffer.pointer); |
1da177e4 LT |
97 | } |
98 | } | |
99 | ||
1da177e4 LT |
100 | /******************************************************************************* |
101 | * | |
102 | * FUNCTION: acpi_ns_valid_root_prefix | |
103 | * | |
ba494bee | 104 | * PARAMETERS: prefix - Character to be checked |
1da177e4 LT |
105 | * |
106 | * RETURN: TRUE if a valid prefix | |
107 | * | |
108 | * DESCRIPTION: Check if a character is a valid ACPI Root prefix | |
109 | * | |
110 | ******************************************************************************/ | |
111 | ||
4be44fcd | 112 | u8 acpi_ns_valid_root_prefix(char prefix) |
1da177e4 LT |
113 | { |
114 | ||
115 | return ((u8) (prefix == '\\')); | |
116 | } | |
117 | ||
1da177e4 LT |
118 | /******************************************************************************* |
119 | * | |
120 | * FUNCTION: acpi_ns_valid_path_separator | |
121 | * | |
ba494bee | 122 | * PARAMETERS: sep - Character to be checked |
1da177e4 LT |
123 | * |
124 | * RETURN: TRUE if a valid path separator | |
125 | * | |
126 | * DESCRIPTION: Check if a character is a valid ACPI path separator | |
127 | * | |
128 | ******************************************************************************/ | |
129 | ||
4be44fcd | 130 | static u8 acpi_ns_valid_path_separator(char sep) |
1da177e4 LT |
131 | { |
132 | ||
133 | return ((u8) (sep == '.')); | |
134 | } | |
135 | ||
1da177e4 LT |
136 | /******************************************************************************* |
137 | * | |
138 | * FUNCTION: acpi_ns_get_type | |
139 | * | |
ba494bee | 140 | * PARAMETERS: node - Parent Node to be examined |
1da177e4 LT |
141 | * |
142 | * RETURN: Type field from Node whose handle is passed | |
143 | * | |
44f6c012 RM |
144 | * DESCRIPTION: Return the type of a Namespace node |
145 | * | |
1da177e4 LT |
146 | ******************************************************************************/ |
147 | ||
4be44fcd | 148 | acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node) |
1da177e4 | 149 | { |
b229cf92 | 150 | ACPI_FUNCTION_TRACE(ns_get_type); |
1da177e4 LT |
151 | |
152 | if (!node) { | |
b8e4d893 | 153 | ACPI_WARNING((AE_INFO, "Null Node parameter")); |
50eca3eb | 154 | return_UINT32(ACPI_TYPE_ANY); |
1da177e4 LT |
155 | } |
156 | ||
50eca3eb | 157 | return_UINT32((acpi_object_type) node->type); |
1da177e4 LT |
158 | } |
159 | ||
1da177e4 LT |
160 | /******************************************************************************* |
161 | * | |
162 | * FUNCTION: acpi_ns_local | |
163 | * | |
ba494bee | 164 | * PARAMETERS: type - A namespace object type |
1da177e4 LT |
165 | * |
166 | * RETURN: LOCAL if names must be found locally in objects of the | |
167 | * passed type, 0 if enclosing scopes should be searched | |
168 | * | |
44f6c012 RM |
169 | * DESCRIPTION: Returns scope rule for the given object type. |
170 | * | |
1da177e4 LT |
171 | ******************************************************************************/ |
172 | ||
4be44fcd | 173 | u32 acpi_ns_local(acpi_object_type type) |
1da177e4 | 174 | { |
b229cf92 | 175 | ACPI_FUNCTION_TRACE(ns_local); |
1da177e4 | 176 | |
4be44fcd | 177 | if (!acpi_ut_valid_object_type(type)) { |
52fc0b02 | 178 | |
1da177e4 LT |
179 | /* Type code out of range */ |
180 | ||
f6a22b0b | 181 | ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type)); |
50eca3eb | 182 | return_UINT32(ACPI_NS_NORMAL); |
1da177e4 LT |
183 | } |
184 | ||
50eca3eb | 185 | return_UINT32((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL); |
1da177e4 LT |
186 | } |
187 | ||
1da177e4 LT |
188 | /******************************************************************************* |
189 | * | |
190 | * FUNCTION: acpi_ns_get_internal_name_length | |
191 | * | |
ba494bee | 192 | * PARAMETERS: info - Info struct initialized with the |
1da177e4 LT |
193 | * external name pointer. |
194 | * | |
44f6c012 | 195 | * RETURN: None |
1da177e4 LT |
196 | * |
197 | * DESCRIPTION: Calculate the length of the internal (AML) namestring | |
198 | * corresponding to the external (ASL) namestring. | |
199 | * | |
200 | ******************************************************************************/ | |
201 | ||
4be44fcd | 202 | void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info) |
1da177e4 | 203 | { |
4b8ed631 | 204 | const char *next_external_char; |
4be44fcd | 205 | u32 i; |
1da177e4 | 206 | |
4be44fcd | 207 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
208 | |
209 | next_external_char = info->external_name; | |
210 | info->num_carats = 0; | |
211 | info->num_segments = 0; | |
212 | info->fully_qualified = FALSE; | |
213 | ||
214 | /* | |
215 | * For the internal name, the required length is 4 bytes per segment, plus | |
216 | * 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null | |
217 | * (which is not really needed, but no there's harm in putting it there) | |
218 | * | |
219 | * strlen() + 1 covers the first name_seg, which has no path separator | |
220 | */ | |
d037c5fd | 221 | if (acpi_ns_valid_root_prefix(*next_external_char)) { |
1da177e4 LT |
222 | info->fully_qualified = TRUE; |
223 | next_external_char++; | |
d037c5fd LM |
224 | |
225 | /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */ | |
226 | ||
227 | while (acpi_ns_valid_root_prefix(*next_external_char)) { | |
228 | next_external_char++; | |
229 | } | |
4be44fcd | 230 | } else { |
d4913dc6 BM |
231 | /* Handle Carat prefixes */ |
232 | ||
1da177e4 LT |
233 | while (*next_external_char == '^') { |
234 | info->num_carats++; | |
235 | next_external_char++; | |
236 | } | |
237 | } | |
238 | ||
239 | /* | |
240 | * Determine the number of ACPI name "segments" by counting the number of | |
241 | * path separators within the string. Start with one segment since the | |
242 | * segment count is [(# separators) + 1], and zero separators is ok. | |
243 | */ | |
244 | if (*next_external_char) { | |
245 | info->num_segments = 1; | |
246 | for (i = 0; next_external_char[i]; i++) { | |
4be44fcd | 247 | if (acpi_ns_valid_path_separator(next_external_char[i])) { |
1da177e4 LT |
248 | info->num_segments++; |
249 | } | |
250 | } | |
251 | } | |
252 | ||
253 | info->length = (ACPI_NAME_SIZE * info->num_segments) + | |
4be44fcd | 254 | 4 + info->num_carats; |
1da177e4 LT |
255 | |
256 | info->next_external_char = next_external_char; | |
257 | } | |
258 | ||
1da177e4 LT |
259 | /******************************************************************************* |
260 | * | |
261 | * FUNCTION: acpi_ns_build_internal_name | |
262 | * | |
ba494bee | 263 | * PARAMETERS: info - Info struct fully initialized |
1da177e4 LT |
264 | * |
265 | * RETURN: Status | |
266 | * | |
267 | * DESCRIPTION: Construct the internal (AML) namestring | |
268 | * corresponding to the external (ASL) namestring. | |
269 | * | |
270 | ******************************************************************************/ | |
271 | ||
4be44fcd | 272 | acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info) |
1da177e4 | 273 | { |
4be44fcd LB |
274 | u32 num_segments = info->num_segments; |
275 | char *internal_name = info->internal_name; | |
4b8ed631 | 276 | const char *external_name = info->next_external_char; |
4be44fcd | 277 | char *result = NULL; |
67a119f9 | 278 | u32 i; |
1da177e4 | 279 | |
b229cf92 | 280 | ACPI_FUNCTION_TRACE(ns_build_internal_name); |
1da177e4 LT |
281 | |
282 | /* Setup the correct prefixes, counts, and pointers */ | |
283 | ||
284 | if (info->fully_qualified) { | |
285 | internal_name[0] = '\\'; | |
286 | ||
287 | if (num_segments <= 1) { | |
288 | result = &internal_name[1]; | |
4be44fcd | 289 | } else if (num_segments == 2) { |
1da177e4 LT |
290 | internal_name[1] = AML_DUAL_NAME_PREFIX; |
291 | result = &internal_name[2]; | |
4be44fcd | 292 | } else { |
1da177e4 | 293 | internal_name[1] = AML_MULTI_NAME_PREFIX_OP; |
4be44fcd | 294 | internal_name[2] = (char)num_segments; |
1da177e4 LT |
295 | result = &internal_name[3]; |
296 | } | |
4be44fcd | 297 | } else { |
1da177e4 LT |
298 | /* |
299 | * Not fully qualified. | |
300 | * Handle Carats first, then append the name segments | |
301 | */ | |
302 | i = 0; | |
303 | if (info->num_carats) { | |
304 | for (i = 0; i < info->num_carats; i++) { | |
305 | internal_name[i] = '^'; | |
306 | } | |
307 | } | |
308 | ||
309 | if (num_segments <= 1) { | |
310 | result = &internal_name[i]; | |
4be44fcd | 311 | } else if (num_segments == 2) { |
1da177e4 | 312 | internal_name[i] = AML_DUAL_NAME_PREFIX; |
67a119f9 | 313 | result = &internal_name[(acpi_size) i + 1]; |
4be44fcd | 314 | } else { |
1da177e4 | 315 | internal_name[i] = AML_MULTI_NAME_PREFIX_OP; |
67a119f9 BM |
316 | internal_name[(acpi_size) i + 1] = (char)num_segments; |
317 | result = &internal_name[(acpi_size) i + 2]; | |
1da177e4 LT |
318 | } |
319 | } | |
320 | ||
321 | /* Build the name (minus path separators) */ | |
322 | ||
323 | for (; num_segments; num_segments--) { | |
324 | for (i = 0; i < ACPI_NAME_SIZE; i++) { | |
4be44fcd LB |
325 | if (acpi_ns_valid_path_separator(*external_name) || |
326 | (*external_name == 0)) { | |
52fc0b02 | 327 | |
1da177e4 LT |
328 | /* Pad the segment with underscore(s) if segment is short */ |
329 | ||
330 | result[i] = '_'; | |
4be44fcd | 331 | } else { |
1da177e4 LT |
332 | /* Convert the character to uppercase and save it */ |
333 | ||
4be44fcd LB |
334 | result[i] = |
335 | (char)ACPI_TOUPPER((int)*external_name); | |
1da177e4 LT |
336 | external_name++; |
337 | } | |
338 | } | |
339 | ||
340 | /* Now we must have a path separator, or the pathname is bad */ | |
341 | ||
4be44fcd LB |
342 | if (!acpi_ns_valid_path_separator(*external_name) && |
343 | (*external_name != 0)) { | |
a1acd22f | 344 | return_ACPI_STATUS(AE_BAD_PATHNAME); |
1da177e4 LT |
345 | } |
346 | ||
347 | /* Move on the next segment */ | |
348 | ||
349 | external_name++; | |
350 | result += ACPI_NAME_SIZE; | |
351 | } | |
352 | ||
353 | /* Terminate the string */ | |
354 | ||
355 | *result = 0; | |
356 | ||
357 | if (info->fully_qualified) { | |
4be44fcd LB |
358 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
359 | "Returning [%p] (abs) \"\\%s\"\n", | |
360 | internal_name, internal_name)); | |
361 | } else { | |
362 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", | |
363 | internal_name, internal_name)); | |
1da177e4 LT |
364 | } |
365 | ||
4be44fcd | 366 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
367 | } |
368 | ||
1da177e4 LT |
369 | /******************************************************************************* |
370 | * | |
371 | * FUNCTION: acpi_ns_internalize_name | |
372 | * | |
373 | * PARAMETERS: *external_name - External representation of name | |
ba494bee | 374 | * **Converted name - Where to return the resulting |
1da177e4 LT |
375 | * internal represention of the name |
376 | * | |
377 | * RETURN: Status | |
378 | * | |
379 | * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") | |
380 | * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) | |
381 | * | |
382 | *******************************************************************************/ | |
383 | ||
4b8ed631 BM |
384 | acpi_status |
385 | acpi_ns_internalize_name(const char *external_name, char **converted_name) | |
1da177e4 | 386 | { |
4be44fcd LB |
387 | char *internal_name; |
388 | struct acpi_namestring_info info; | |
389 | acpi_status status; | |
1da177e4 | 390 | |
b229cf92 | 391 | ACPI_FUNCTION_TRACE(ns_internalize_name); |
1da177e4 | 392 | |
4be44fcd LB |
393 | if ((!external_name) || (*external_name == 0) || (!converted_name)) { |
394 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
395 | } |
396 | ||
397 | /* Get the length of the new internal name */ | |
398 | ||
399 | info.external_name = external_name; | |
4be44fcd | 400 | acpi_ns_get_internal_name_length(&info); |
1da177e4 LT |
401 | |
402 | /* We need a segment to store the internal name */ | |
403 | ||
8313524a | 404 | internal_name = ACPI_ALLOCATE_ZEROED(info.length); |
1da177e4 | 405 | if (!internal_name) { |
4be44fcd | 406 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
407 | } |
408 | ||
409 | /* Build the name */ | |
410 | ||
411 | info.internal_name = internal_name; | |
4be44fcd LB |
412 | status = acpi_ns_build_internal_name(&info); |
413 | if (ACPI_FAILURE(status)) { | |
8313524a | 414 | ACPI_FREE(internal_name); |
4be44fcd | 415 | return_ACPI_STATUS(status); |
1da177e4 LT |
416 | } |
417 | ||
418 | *converted_name = internal_name; | |
4be44fcd | 419 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
420 | } |
421 | ||
1da177e4 LT |
422 | /******************************************************************************* |
423 | * | |
424 | * FUNCTION: acpi_ns_externalize_name | |
425 | * | |
44f6c012 RM |
426 | * PARAMETERS: internal_name_length - Lenth of the internal name below |
427 | * internal_name - Internal representation of name | |
428 | * converted_name_length - Where the length is returned | |
429 | * converted_name - Where the resulting external name | |
430 | * is returned | |
1da177e4 LT |
431 | * |
432 | * RETURN: Status | |
433 | * | |
434 | * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) | |
44f6c012 | 435 | * to its external (printable) form (e.g. "\_PR_.CPU0") |
1da177e4 LT |
436 | * |
437 | ******************************************************************************/ | |
438 | ||
439 | acpi_status | |
4be44fcd | 440 | acpi_ns_externalize_name(u32 internal_name_length, |
4b8ed631 | 441 | const char *internal_name, |
4be44fcd | 442 | u32 * converted_name_length, char **converted_name) |
1da177e4 | 443 | { |
67a119f9 BM |
444 | u32 names_index = 0; |
445 | u32 num_segments = 0; | |
446 | u32 required_length; | |
447 | u32 prefix_length = 0; | |
448 | u32 i = 0; | |
449 | u32 j = 0; | |
1da177e4 | 450 | |
b229cf92 | 451 | ACPI_FUNCTION_TRACE(ns_externalize_name); |
1da177e4 | 452 | |
4be44fcd LB |
453 | if (!internal_name_length || !internal_name || !converted_name) { |
454 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
455 | } |
456 | ||
d4913dc6 BM |
457 | /* Check for a prefix (one '\' | one or more '^') */ |
458 | ||
1da177e4 LT |
459 | switch (internal_name[0]) { |
460 | case '\\': | |
461 | prefix_length = 1; | |
462 | break; | |
463 | ||
464 | case '^': | |
465 | for (i = 0; i < internal_name_length; i++) { | |
466 | if (internal_name[i] == '^') { | |
467 | prefix_length = i + 1; | |
4be44fcd | 468 | } else { |
1da177e4 LT |
469 | break; |
470 | } | |
471 | } | |
472 | ||
473 | if (i == internal_name_length) { | |
474 | prefix_length = i; | |
475 | } | |
476 | ||
477 | break; | |
478 | ||
479 | default: | |
480 | break; | |
481 | } | |
482 | ||
483 | /* | |
d4913dc6 | 484 | * Check for object names. Note that there could be 0-255 of these |
1da177e4 LT |
485 | * 4-byte elements. |
486 | */ | |
487 | if (prefix_length < internal_name_length) { | |
488 | switch (internal_name[prefix_length]) { | |
489 | case AML_MULTI_NAME_PREFIX_OP: | |
490 | ||
491 | /* <count> 4-byte names */ | |
492 | ||
493 | names_index = prefix_length + 2; | |
67a119f9 BM |
494 | num_segments = (u8) |
495 | internal_name[(acpi_size) prefix_length + 1]; | |
1da177e4 LT |
496 | break; |
497 | ||
498 | case AML_DUAL_NAME_PREFIX: | |
499 | ||
500 | /* Two 4-byte names */ | |
501 | ||
502 | names_index = prefix_length + 1; | |
503 | num_segments = 2; | |
504 | break; | |
505 | ||
506 | case 0: | |
507 | ||
508 | /* null_name */ | |
509 | ||
510 | names_index = 0; | |
511 | num_segments = 0; | |
512 | break; | |
513 | ||
514 | default: | |
515 | ||
516 | /* one 4-byte name */ | |
517 | ||
518 | names_index = prefix_length; | |
519 | num_segments = 1; | |
520 | break; | |
521 | } | |
522 | } | |
523 | ||
524 | /* | |
525 | * Calculate the length of converted_name, which equals the length | |
526 | * of the prefix, length of all object names, length of any required | |
527 | * punctuation ('.') between object names, plus the NULL terminator. | |
528 | */ | |
529 | required_length = prefix_length + (4 * num_segments) + | |
4be44fcd | 530 | ((num_segments > 0) ? (num_segments - 1) : 0) + 1; |
1da177e4 LT |
531 | |
532 | /* | |
73a3090a | 533 | * Check to see if we're still in bounds. If not, there's a problem |
1da177e4 LT |
534 | * with internal_name (invalid format). |
535 | */ | |
536 | if (required_length > internal_name_length) { | |
b8e4d893 | 537 | ACPI_ERROR((AE_INFO, "Invalid internal name")); |
4be44fcd | 538 | return_ACPI_STATUS(AE_BAD_PATHNAME); |
1da177e4 LT |
539 | } |
540 | ||
d4913dc6 BM |
541 | /* Build the converted_name */ |
542 | ||
8313524a | 543 | *converted_name = ACPI_ALLOCATE_ZEROED(required_length); |
1da177e4 | 544 | if (!(*converted_name)) { |
4be44fcd | 545 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
546 | } |
547 | ||
548 | j = 0; | |
549 | ||
550 | for (i = 0; i < prefix_length; i++) { | |
551 | (*converted_name)[j++] = internal_name[i]; | |
552 | } | |
553 | ||
554 | if (num_segments > 0) { | |
555 | for (i = 0; i < num_segments; i++) { | |
556 | if (i > 0) { | |
557 | (*converted_name)[j++] = '.'; | |
558 | } | |
559 | ||
47abd13c BM |
560 | /* Copy and validate the 4-char name segment */ |
561 | ||
562 | ACPI_MOVE_NAME(&(*converted_name)[j], | |
563 | &internal_name[names_index]); | |
564 | acpi_ut_repair_name(&(*converted_name)[j]); | |
00eb3255 BM |
565 | |
566 | j += ACPI_NAME_SIZE; | |
567 | names_index += ACPI_NAME_SIZE; | |
1da177e4 LT |
568 | } |
569 | } | |
570 | ||
571 | if (converted_name_length) { | |
572 | *converted_name_length = (u32) required_length; | |
573 | } | |
574 | ||
4be44fcd | 575 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
576 | } |
577 | ||
1da177e4 LT |
578 | /******************************************************************************* |
579 | * | |
f24b664d | 580 | * FUNCTION: acpi_ns_validate_handle |
1da177e4 | 581 | * |
ba494bee | 582 | * PARAMETERS: handle - Handle to be validated and typecast to a |
f24b664d | 583 | * namespace node. |
1da177e4 | 584 | * |
f24b664d | 585 | * RETURN: A pointer to a namespace node |
1da177e4 | 586 | * |
f24b664d BM |
587 | * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special |
588 | * cases for the root node. | |
1da177e4 | 589 | * |
f24b664d | 590 | * NOTE: Real integer handles would allow for more verification |
44f6c012 | 591 | * and keep all pointers within this subsystem - however this introduces |
f24b664d BM |
592 | * more overhead and has not been necessary to this point. Drivers |
593 | * holding handles are typically notified before a node becomes invalid | |
594 | * due to a table unload. | |
d4913dc6 | 595 | * |
1da177e4 LT |
596 | ******************************************************************************/ |
597 | ||
f24b664d | 598 | struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle) |
1da177e4 LT |
599 | { |
600 | ||
4be44fcd | 601 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 602 | |
d4913dc6 BM |
603 | /* Parameter validation */ |
604 | ||
4119532c | 605 | if ((!handle) || (handle == ACPI_ROOT_OBJECT)) { |
1da177e4 LT |
606 | return (acpi_gbl_root_node); |
607 | } | |
608 | ||
609 | /* We can at least attempt to verify the handle */ | |
610 | ||
4be44fcd | 611 | if (ACPI_GET_DESCRIPTOR_TYPE(handle) != ACPI_DESC_TYPE_NAMED) { |
1da177e4 LT |
612 | return (NULL); |
613 | } | |
614 | ||
4119532c | 615 | return (ACPI_CAST_PTR(struct acpi_namespace_node, handle)); |
1da177e4 LT |
616 | } |
617 | ||
1da177e4 LT |
618 | /******************************************************************************* |
619 | * | |
620 | * FUNCTION: acpi_ns_terminate | |
621 | * | |
622 | * PARAMETERS: none | |
623 | * | |
624 | * RETURN: none | |
625 | * | |
44f6c012 | 626 | * DESCRIPTION: free memory allocated for namespace and ACPI table storage. |
1da177e4 LT |
627 | * |
628 | ******************************************************************************/ | |
629 | ||
4be44fcd | 630 | void acpi_ns_terminate(void) |
1da177e4 | 631 | { |
4be44fcd | 632 | union acpi_operand_object *obj_desc; |
1da177e4 | 633 | |
b229cf92 | 634 | ACPI_FUNCTION_TRACE(ns_terminate); |
1da177e4 LT |
635 | |
636 | /* | |
637 | * 1) Free the entire namespace -- all nodes and objects | |
638 | * | |
639 | * Delete all object descriptors attached to namepsace nodes | |
640 | */ | |
4be44fcd | 641 | acpi_ns_delete_namespace_subtree(acpi_gbl_root_node); |
1da177e4 LT |
642 | |
643 | /* Detach any objects attached to the root */ | |
644 | ||
4be44fcd | 645 | obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node); |
1da177e4 | 646 | if (obj_desc) { |
4be44fcd | 647 | acpi_ns_detach_object(acpi_gbl_root_node); |
1da177e4 LT |
648 | } |
649 | ||
4be44fcd | 650 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n")); |
1da177e4 LT |
651 | return_VOID; |
652 | } | |
653 | ||
1da177e4 LT |
654 | /******************************************************************************* |
655 | * | |
656 | * FUNCTION: acpi_ns_opens_scope | |
657 | * | |
ba494bee | 658 | * PARAMETERS: type - A valid namespace type |
1da177e4 LT |
659 | * |
660 | * RETURN: NEWSCOPE if the passed type "opens a name scope" according | |
661 | * to the ACPI specification, else 0 | |
662 | * | |
663 | ******************************************************************************/ | |
664 | ||
4be44fcd | 665 | u32 acpi_ns_opens_scope(acpi_object_type type) |
1da177e4 | 666 | { |
b229cf92 | 667 | ACPI_FUNCTION_TRACE_STR(ns_opens_scope, acpi_ut_get_type_name(type)); |
1da177e4 | 668 | |
4be44fcd | 669 | if (!acpi_ut_valid_object_type(type)) { |
52fc0b02 | 670 | |
1da177e4 LT |
671 | /* type code out of range */ |
672 | ||
f6a22b0b | 673 | ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type)); |
50eca3eb | 674 | return_UINT32(ACPI_NS_NORMAL); |
1da177e4 LT |
675 | } |
676 | ||
50eca3eb | 677 | return_UINT32(((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE); |
1da177e4 LT |
678 | } |
679 | ||
1da177e4 LT |
680 | /******************************************************************************* |
681 | * | |
4119532c | 682 | * FUNCTION: acpi_ns_get_node |
1da177e4 | 683 | * |
ba494bee | 684 | * PARAMETERS: *pathname - Name to be found, in external (ASL) format. The |
1da177e4 LT |
685 | * \ (backslash) and ^ (carat) prefixes, and the |
686 | * . (period) to separate segments are supported. | |
4119532c | 687 | * prefix_node - Root of subtree to be searched, or NS_ALL for the |
73a3090a | 688 | * root of the name space. If Name is fully |
1da177e4 LT |
689 | * qualified (first s8 is '\'), the passed value |
690 | * of Scope will not be accessed. | |
ba494bee | 691 | * flags - Used to indicate whether to perform upsearch or |
1da177e4 LT |
692 | * not. |
693 | * return_node - Where the Node is returned | |
694 | * | |
695 | * DESCRIPTION: Look up a name relative to a given scope and return the | |
73a3090a | 696 | * corresponding Node. NOTE: Scope can be null. |
1da177e4 LT |
697 | * |
698 | * MUTEX: Locks namespace | |
699 | * | |
700 | ******************************************************************************/ | |
701 | ||
702 | acpi_status | |
4119532c | 703 | acpi_ns_get_node(struct acpi_namespace_node *prefix_node, |
4b8ed631 | 704 | const char *pathname, |
4119532c | 705 | u32 flags, struct acpi_namespace_node **return_node) |
1da177e4 | 706 | { |
4be44fcd LB |
707 | union acpi_generic_state scope_info; |
708 | acpi_status status; | |
4119532c | 709 | char *internal_path; |
1da177e4 | 710 | |
5853a9f6 | 711 | ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname)); |
1da177e4 | 712 | |
4119532c BM |
713 | if (!pathname) { |
714 | *return_node = prefix_node; | |
715 | if (!prefix_node) { | |
716 | *return_node = acpi_gbl_root_node; | |
717 | } | |
718 | return_ACPI_STATUS(AE_OK); | |
719 | } | |
52fc0b02 | 720 | |
4119532c | 721 | /* Convert path to internal representation */ |
1da177e4 | 722 | |
4119532c BM |
723 | status = acpi_ns_internalize_name(pathname, &internal_path); |
724 | if (ACPI_FAILURE(status)) { | |
725 | return_ACPI_STATUS(status); | |
1da177e4 LT |
726 | } |
727 | ||
728 | /* Must lock namespace during lookup */ | |
729 | ||
4be44fcd LB |
730 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
731 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
732 | goto cleanup; |
733 | } | |
734 | ||
735 | /* Setup lookup scope (search starting point) */ | |
736 | ||
4119532c | 737 | scope_info.scope.node = prefix_node; |
1da177e4 LT |
738 | |
739 | /* Lookup the name in the namespace */ | |
740 | ||
4119532c BM |
741 | status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY, |
742 | ACPI_IMODE_EXECUTE, | |
743 | (flags | ACPI_NS_DONT_OPEN_SCOPE), NULL, | |
744 | return_node); | |
4be44fcd | 745 | if (ACPI_FAILURE(status)) { |
7bcc06e8 | 746 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s, %s\n", |
4119532c | 747 | pathname, acpi_format_exception(status))); |
1da177e4 LT |
748 | } |
749 | ||
4be44fcd | 750 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 | 751 | |
4be44fcd | 752 | cleanup: |
4119532c | 753 | ACPI_FREE(internal_path); |
4be44fcd | 754 | return_ACPI_STATUS(status); |
1da177e4 | 755 | } |