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" | |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_NAMESPACE | |
4be44fcd | 51 | ACPI_MODULE_NAME("nsutils") |
1da177e4 | 52 | |
44f6c012 | 53 | /* Local prototypes */ |
4be44fcd | 54 | static u8 acpi_ns_valid_path_separator(char sep); |
44f6c012 RM |
55 | |
56 | #ifdef ACPI_OBSOLETE_FUNCTIONS | |
4be44fcd | 57 | acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search); |
44f6c012 RM |
58 | #endif |
59 | ||
1da177e4 LT |
60 | /******************************************************************************* |
61 | * | |
62 | * FUNCTION: acpi_ns_print_node_pathname | |
63 | * | |
ba494bee BM |
64 | * PARAMETERS: node - Object |
65 | * message - Prefix message | |
1da177e4 LT |
66 | * |
67 | * DESCRIPTION: Print an object's full namespace pathname | |
68 | * Manages allocation/freeing of a pathname buffer | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
72 | void | |
4b8ed631 BM |
73 | acpi_ns_print_node_pathname(struct acpi_namespace_node *node, |
74 | const char *message) | |
1da177e4 | 75 | { |
4be44fcd LB |
76 | struct acpi_buffer buffer; |
77 | acpi_status status; | |
1da177e4 LT |
78 | |
79 | if (!node) { | |
4be44fcd | 80 | acpi_os_printf("[NULL NAME]"); |
1da177e4 LT |
81 | return; |
82 | } | |
83 | ||
84 | /* Convert handle to full pathname and print it (with supplied message) */ | |
85 | ||
86 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; | |
87 | ||
4be44fcd LB |
88 | status = acpi_ns_handle_to_pathname(node, &buffer); |
89 | if (ACPI_SUCCESS(status)) { | |
44f6c012 | 90 | if (message) { |
4be44fcd | 91 | acpi_os_printf("%s ", message); |
1da177e4 LT |
92 | } |
93 | ||
4be44fcd | 94 | acpi_os_printf("[%s] (Node %p)", (char *)buffer.pointer, node); |
8313524a | 95 | ACPI_FREE(buffer.pointer); |
1da177e4 LT |
96 | } |
97 | } | |
98 | ||
1da177e4 LT |
99 | /******************************************************************************* |
100 | * | |
101 | * FUNCTION: acpi_ns_valid_root_prefix | |
102 | * | |
ba494bee | 103 | * PARAMETERS: prefix - Character to be checked |
1da177e4 LT |
104 | * |
105 | * RETURN: TRUE if a valid prefix | |
106 | * | |
107 | * DESCRIPTION: Check if a character is a valid ACPI Root prefix | |
108 | * | |
109 | ******************************************************************************/ | |
110 | ||
4be44fcd | 111 | u8 acpi_ns_valid_root_prefix(char prefix) |
1da177e4 LT |
112 | { |
113 | ||
3e8214e5 | 114 | return ((u8)(prefix == '\\')); |
1da177e4 LT |
115 | } |
116 | ||
1da177e4 LT |
117 | /******************************************************************************* |
118 | * | |
119 | * FUNCTION: acpi_ns_valid_path_separator | |
120 | * | |
ba494bee | 121 | * PARAMETERS: sep - Character to be checked |
1da177e4 LT |
122 | * |
123 | * RETURN: TRUE if a valid path separator | |
124 | * | |
125 | * DESCRIPTION: Check if a character is a valid ACPI path separator | |
126 | * | |
127 | ******************************************************************************/ | |
128 | ||
4be44fcd | 129 | static u8 acpi_ns_valid_path_separator(char sep) |
1da177e4 LT |
130 | { |
131 | ||
3e8214e5 | 132 | return ((u8)(sep == '.')); |
1da177e4 LT |
133 | } |
134 | ||
1da177e4 LT |
135 | /******************************************************************************* |
136 | * | |
137 | * FUNCTION: acpi_ns_get_type | |
138 | * | |
ba494bee | 139 | * PARAMETERS: node - Parent Node to be examined |
1da177e4 LT |
140 | * |
141 | * RETURN: Type field from Node whose handle is passed | |
142 | * | |
44f6c012 RM |
143 | * DESCRIPTION: Return the type of a Namespace node |
144 | * | |
1da177e4 LT |
145 | ******************************************************************************/ |
146 | ||
4be44fcd | 147 | acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node) |
1da177e4 | 148 | { |
b229cf92 | 149 | ACPI_FUNCTION_TRACE(ns_get_type); |
1da177e4 LT |
150 | |
151 | if (!node) { | |
b8e4d893 | 152 | ACPI_WARNING((AE_INFO, "Null Node parameter")); |
50eca3eb | 153 | return_UINT32(ACPI_TYPE_ANY); |
1da177e4 LT |
154 | } |
155 | ||
50eca3eb | 156 | return_UINT32((acpi_object_type) node->type); |
1da177e4 LT |
157 | } |
158 | ||
1da177e4 LT |
159 | /******************************************************************************* |
160 | * | |
161 | * FUNCTION: acpi_ns_local | |
162 | * | |
ba494bee | 163 | * PARAMETERS: type - A namespace object type |
1da177e4 LT |
164 | * |
165 | * RETURN: LOCAL if names must be found locally in objects of the | |
166 | * passed type, 0 if enclosing scopes should be searched | |
167 | * | |
44f6c012 RM |
168 | * DESCRIPTION: Returns scope rule for the given object type. |
169 | * | |
1da177e4 LT |
170 | ******************************************************************************/ |
171 | ||
4be44fcd | 172 | u32 acpi_ns_local(acpi_object_type type) |
1da177e4 | 173 | { |
b229cf92 | 174 | ACPI_FUNCTION_TRACE(ns_local); |
1da177e4 | 175 | |
4be44fcd | 176 | if (!acpi_ut_valid_object_type(type)) { |
52fc0b02 | 177 | |
1da177e4 LT |
178 | /* Type code out of range */ |
179 | ||
f6a22b0b | 180 | ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type)); |
50eca3eb | 181 | return_UINT32(ACPI_NS_NORMAL); |
1da177e4 LT |
182 | } |
183 | ||
50eca3eb | 184 | return_UINT32((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL); |
1da177e4 LT |
185 | } |
186 | ||
1da177e4 LT |
187 | /******************************************************************************* |
188 | * | |
189 | * FUNCTION: acpi_ns_get_internal_name_length | |
190 | * | |
ba494bee | 191 | * PARAMETERS: info - Info struct initialized with the |
1da177e4 LT |
192 | * external name pointer. |
193 | * | |
44f6c012 | 194 | * RETURN: None |
1da177e4 LT |
195 | * |
196 | * DESCRIPTION: Calculate the length of the internal (AML) namestring | |
197 | * corresponding to the external (ASL) namestring. | |
198 | * | |
199 | ******************************************************************************/ | |
200 | ||
4be44fcd | 201 | void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info) |
1da177e4 | 202 | { |
4b8ed631 | 203 | const char *next_external_char; |
4be44fcd | 204 | u32 i; |
1da177e4 | 205 | |
4be44fcd | 206 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
207 | |
208 | next_external_char = info->external_name; | |
209 | info->num_carats = 0; | |
210 | info->num_segments = 0; | |
211 | info->fully_qualified = FALSE; | |
212 | ||
213 | /* | |
214 | * For the internal name, the required length is 4 bytes per segment, plus | |
215 | * 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null | |
216 | * (which is not really needed, but no there's harm in putting it there) | |
217 | * | |
218 | * strlen() + 1 covers the first name_seg, which has no path separator | |
219 | */ | |
d037c5fd | 220 | if (acpi_ns_valid_root_prefix(*next_external_char)) { |
1da177e4 LT |
221 | info->fully_qualified = TRUE; |
222 | next_external_char++; | |
d037c5fd LM |
223 | |
224 | /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */ | |
225 | ||
226 | while (acpi_ns_valid_root_prefix(*next_external_char)) { | |
227 | next_external_char++; | |
228 | } | |
4be44fcd | 229 | } else { |
d4913dc6 BM |
230 | /* Handle Carat prefixes */ |
231 | ||
1da177e4 LT |
232 | while (*next_external_char == '^') { |
233 | info->num_carats++; | |
234 | next_external_char++; | |
235 | } | |
236 | } | |
237 | ||
238 | /* | |
239 | * Determine the number of ACPI name "segments" by counting the number of | |
240 | * path separators within the string. Start with one segment since the | |
241 | * segment count is [(# separators) + 1], and zero separators is ok. | |
242 | */ | |
243 | if (*next_external_char) { | |
244 | info->num_segments = 1; | |
245 | for (i = 0; next_external_char[i]; i++) { | |
4be44fcd | 246 | if (acpi_ns_valid_path_separator(next_external_char[i])) { |
1da177e4 LT |
247 | info->num_segments++; |
248 | } | |
249 | } | |
250 | } | |
251 | ||
252 | info->length = (ACPI_NAME_SIZE * info->num_segments) + | |
4be44fcd | 253 | 4 + info->num_carats; |
1da177e4 LT |
254 | |
255 | info->next_external_char = next_external_char; | |
256 | } | |
257 | ||
1da177e4 LT |
258 | /******************************************************************************* |
259 | * | |
260 | * FUNCTION: acpi_ns_build_internal_name | |
261 | * | |
ba494bee | 262 | * PARAMETERS: info - Info struct fully initialized |
1da177e4 LT |
263 | * |
264 | * RETURN: Status | |
265 | * | |
266 | * DESCRIPTION: Construct the internal (AML) namestring | |
267 | * corresponding to the external (ASL) namestring. | |
268 | * | |
269 | ******************************************************************************/ | |
270 | ||
4be44fcd | 271 | acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info) |
1da177e4 | 272 | { |
4be44fcd LB |
273 | u32 num_segments = info->num_segments; |
274 | char *internal_name = info->internal_name; | |
4b8ed631 | 275 | const char *external_name = info->next_external_char; |
4be44fcd | 276 | char *result = NULL; |
67a119f9 | 277 | u32 i; |
1da177e4 | 278 | |
b229cf92 | 279 | ACPI_FUNCTION_TRACE(ns_build_internal_name); |
1da177e4 LT |
280 | |
281 | /* Setup the correct prefixes, counts, and pointers */ | |
282 | ||
283 | if (info->fully_qualified) { | |
284 | internal_name[0] = '\\'; | |
285 | ||
286 | if (num_segments <= 1) { | |
287 | result = &internal_name[1]; | |
4be44fcd | 288 | } else if (num_segments == 2) { |
1da177e4 LT |
289 | internal_name[1] = AML_DUAL_NAME_PREFIX; |
290 | result = &internal_name[2]; | |
4be44fcd | 291 | } else { |
1da177e4 | 292 | internal_name[1] = AML_MULTI_NAME_PREFIX_OP; |
4be44fcd | 293 | internal_name[2] = (char)num_segments; |
1da177e4 LT |
294 | result = &internal_name[3]; |
295 | } | |
4be44fcd | 296 | } else { |
1da177e4 LT |
297 | /* |
298 | * Not fully qualified. | |
299 | * Handle Carats first, then append the name segments | |
300 | */ | |
301 | i = 0; | |
302 | if (info->num_carats) { | |
303 | for (i = 0; i < info->num_carats; i++) { | |
304 | internal_name[i] = '^'; | |
305 | } | |
306 | } | |
307 | ||
308 | if (num_segments <= 1) { | |
309 | result = &internal_name[i]; | |
4be44fcd | 310 | } else if (num_segments == 2) { |
1da177e4 | 311 | internal_name[i] = AML_DUAL_NAME_PREFIX; |
67a119f9 | 312 | result = &internal_name[(acpi_size) i + 1]; |
4be44fcd | 313 | } else { |
1da177e4 | 314 | internal_name[i] = AML_MULTI_NAME_PREFIX_OP; |
67a119f9 BM |
315 | internal_name[(acpi_size) i + 1] = (char)num_segments; |
316 | result = &internal_name[(acpi_size) i + 2]; | |
1da177e4 LT |
317 | } |
318 | } | |
319 | ||
320 | /* Build the name (minus path separators) */ | |
321 | ||
322 | for (; num_segments; num_segments--) { | |
323 | for (i = 0; i < ACPI_NAME_SIZE; i++) { | |
4be44fcd LB |
324 | if (acpi_ns_valid_path_separator(*external_name) || |
325 | (*external_name == 0)) { | |
52fc0b02 | 326 | |
1da177e4 LT |
327 | /* Pad the segment with underscore(s) if segment is short */ |
328 | ||
329 | result[i] = '_'; | |
4be44fcd | 330 | } else { |
1da177e4 LT |
331 | /* Convert the character to uppercase and save it */ |
332 | ||
4be44fcd LB |
333 | result[i] = |
334 | (char)ACPI_TOUPPER((int)*external_name); | |
1da177e4 LT |
335 | external_name++; |
336 | } | |
337 | } | |
338 | ||
339 | /* Now we must have a path separator, or the pathname is bad */ | |
340 | ||
4be44fcd LB |
341 | if (!acpi_ns_valid_path_separator(*external_name) && |
342 | (*external_name != 0)) { | |
a1acd22f | 343 | return_ACPI_STATUS(AE_BAD_PATHNAME); |
1da177e4 LT |
344 | } |
345 | ||
346 | /* Move on the next segment */ | |
347 | ||
348 | external_name++; | |
349 | result += ACPI_NAME_SIZE; | |
350 | } | |
351 | ||
352 | /* Terminate the string */ | |
353 | ||
354 | *result = 0; | |
355 | ||
356 | if (info->fully_qualified) { | |
4be44fcd LB |
357 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
358 | "Returning [%p] (abs) \"\\%s\"\n", | |
359 | internal_name, internal_name)); | |
360 | } else { | |
361 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", | |
362 | internal_name, internal_name)); | |
1da177e4 LT |
363 | } |
364 | ||
4be44fcd | 365 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
366 | } |
367 | ||
1da177e4 LT |
368 | /******************************************************************************* |
369 | * | |
370 | * FUNCTION: acpi_ns_internalize_name | |
371 | * | |
372 | * PARAMETERS: *external_name - External representation of name | |
ba494bee | 373 | * **Converted name - Where to return the resulting |
1da177e4 LT |
374 | * internal represention of the name |
375 | * | |
376 | * RETURN: Status | |
377 | * | |
378 | * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") | |
379 | * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) | |
380 | * | |
381 | *******************************************************************************/ | |
382 | ||
4b8ed631 BM |
383 | acpi_status |
384 | acpi_ns_internalize_name(const char *external_name, char **converted_name) | |
1da177e4 | 385 | { |
4be44fcd LB |
386 | char *internal_name; |
387 | struct acpi_namestring_info info; | |
388 | acpi_status status; | |
1da177e4 | 389 | |
b229cf92 | 390 | ACPI_FUNCTION_TRACE(ns_internalize_name); |
1da177e4 | 391 | |
4be44fcd LB |
392 | if ((!external_name) || (*external_name == 0) || (!converted_name)) { |
393 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
394 | } |
395 | ||
396 | /* Get the length of the new internal name */ | |
397 | ||
398 | info.external_name = external_name; | |
4be44fcd | 399 | acpi_ns_get_internal_name_length(&info); |
1da177e4 LT |
400 | |
401 | /* We need a segment to store the internal name */ | |
402 | ||
8313524a | 403 | internal_name = ACPI_ALLOCATE_ZEROED(info.length); |
1da177e4 | 404 | if (!internal_name) { |
4be44fcd | 405 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
406 | } |
407 | ||
408 | /* Build the name */ | |
409 | ||
410 | info.internal_name = internal_name; | |
4be44fcd LB |
411 | status = acpi_ns_build_internal_name(&info); |
412 | if (ACPI_FAILURE(status)) { | |
8313524a | 413 | ACPI_FREE(internal_name); |
4be44fcd | 414 | return_ACPI_STATUS(status); |
1da177e4 LT |
415 | } |
416 | ||
417 | *converted_name = internal_name; | |
4be44fcd | 418 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
419 | } |
420 | ||
1da177e4 LT |
421 | /******************************************************************************* |
422 | * | |
423 | * FUNCTION: acpi_ns_externalize_name | |
424 | * | |
44f6c012 RM |
425 | * PARAMETERS: internal_name_length - Lenth of the internal name below |
426 | * internal_name - Internal representation of name | |
427 | * converted_name_length - Where the length is returned | |
428 | * converted_name - Where the resulting external name | |
429 | * is returned | |
1da177e4 LT |
430 | * |
431 | * RETURN: Status | |
432 | * | |
433 | * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) | |
44f6c012 | 434 | * to its external (printable) form (e.g. "\_PR_.CPU0") |
1da177e4 LT |
435 | * |
436 | ******************************************************************************/ | |
437 | ||
438 | acpi_status | |
4be44fcd | 439 | acpi_ns_externalize_name(u32 internal_name_length, |
4b8ed631 | 440 | const char *internal_name, |
4be44fcd | 441 | u32 * converted_name_length, char **converted_name) |
1da177e4 | 442 | { |
67a119f9 BM |
443 | u32 names_index = 0; |
444 | u32 num_segments = 0; | |
445 | u32 required_length; | |
446 | u32 prefix_length = 0; | |
447 | u32 i = 0; | |
448 | u32 j = 0; | |
1da177e4 | 449 | |
b229cf92 | 450 | ACPI_FUNCTION_TRACE(ns_externalize_name); |
1da177e4 | 451 | |
4be44fcd LB |
452 | if (!internal_name_length || !internal_name || !converted_name) { |
453 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
454 | } |
455 | ||
d4913dc6 BM |
456 | /* Check for a prefix (one '\' | one or more '^') */ |
457 | ||
1da177e4 LT |
458 | switch (internal_name[0]) { |
459 | case '\\': | |
460 | prefix_length = 1; | |
461 | break; | |
462 | ||
463 | case '^': | |
464 | for (i = 0; i < internal_name_length; i++) { | |
465 | if (internal_name[i] == '^') { | |
466 | prefix_length = i + 1; | |
4be44fcd | 467 | } else { |
1da177e4 LT |
468 | break; |
469 | } | |
470 | } | |
471 | ||
472 | if (i == internal_name_length) { | |
473 | prefix_length = i; | |
474 | } | |
475 | ||
476 | break; | |
477 | ||
478 | default: | |
479 | break; | |
480 | } | |
481 | ||
482 | /* | |
d4913dc6 | 483 | * Check for object names. Note that there could be 0-255 of these |
1da177e4 LT |
484 | * 4-byte elements. |
485 | */ | |
486 | if (prefix_length < internal_name_length) { | |
487 | switch (internal_name[prefix_length]) { | |
488 | case AML_MULTI_NAME_PREFIX_OP: | |
489 | ||
490 | /* <count> 4-byte names */ | |
491 | ||
492 | names_index = prefix_length + 2; | |
67a119f9 BM |
493 | num_segments = (u8) |
494 | internal_name[(acpi_size) prefix_length + 1]; | |
1da177e4 LT |
495 | break; |
496 | ||
497 | case AML_DUAL_NAME_PREFIX: | |
498 | ||
499 | /* Two 4-byte names */ | |
500 | ||
501 | names_index = prefix_length + 1; | |
502 | num_segments = 2; | |
503 | break; | |
504 | ||
505 | case 0: | |
506 | ||
507 | /* null_name */ | |
508 | ||
509 | names_index = 0; | |
510 | num_segments = 0; | |
511 | break; | |
512 | ||
513 | default: | |
514 | ||
515 | /* one 4-byte name */ | |
516 | ||
517 | names_index = prefix_length; | |
518 | num_segments = 1; | |
519 | break; | |
520 | } | |
521 | } | |
522 | ||
523 | /* | |
524 | * Calculate the length of converted_name, which equals the length | |
525 | * of the prefix, length of all object names, length of any required | |
526 | * punctuation ('.') between object names, plus the NULL terminator. | |
527 | */ | |
528 | required_length = prefix_length + (4 * num_segments) + | |
4be44fcd | 529 | ((num_segments > 0) ? (num_segments - 1) : 0) + 1; |
1da177e4 LT |
530 | |
531 | /* | |
73a3090a | 532 | * Check to see if we're still in bounds. If not, there's a problem |
1da177e4 LT |
533 | * with internal_name (invalid format). |
534 | */ | |
535 | if (required_length > internal_name_length) { | |
b8e4d893 | 536 | ACPI_ERROR((AE_INFO, "Invalid internal name")); |
4be44fcd | 537 | return_ACPI_STATUS(AE_BAD_PATHNAME); |
1da177e4 LT |
538 | } |
539 | ||
d4913dc6 BM |
540 | /* Build the converted_name */ |
541 | ||
8313524a | 542 | *converted_name = ACPI_ALLOCATE_ZEROED(required_length); |
1da177e4 | 543 | if (!(*converted_name)) { |
4be44fcd | 544 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
545 | } |
546 | ||
547 | j = 0; | |
548 | ||
549 | for (i = 0; i < prefix_length; i++) { | |
550 | (*converted_name)[j++] = internal_name[i]; | |
551 | } | |
552 | ||
553 | if (num_segments > 0) { | |
554 | for (i = 0; i < num_segments; i++) { | |
555 | if (i > 0) { | |
556 | (*converted_name)[j++] = '.'; | |
557 | } | |
558 | ||
47abd13c BM |
559 | /* Copy and validate the 4-char name segment */ |
560 | ||
561 | ACPI_MOVE_NAME(&(*converted_name)[j], | |
562 | &internal_name[names_index]); | |
563 | acpi_ut_repair_name(&(*converted_name)[j]); | |
00eb3255 BM |
564 | |
565 | j += ACPI_NAME_SIZE; | |
566 | names_index += ACPI_NAME_SIZE; | |
1da177e4 LT |
567 | } |
568 | } | |
569 | ||
570 | if (converted_name_length) { | |
571 | *converted_name_length = (u32) required_length; | |
572 | } | |
573 | ||
4be44fcd | 574 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
575 | } |
576 | ||
1da177e4 LT |
577 | /******************************************************************************* |
578 | * | |
f24b664d | 579 | * FUNCTION: acpi_ns_validate_handle |
1da177e4 | 580 | * |
ba494bee | 581 | * PARAMETERS: handle - Handle to be validated and typecast to a |
f24b664d | 582 | * namespace node. |
1da177e4 | 583 | * |
f24b664d | 584 | * RETURN: A pointer to a namespace node |
1da177e4 | 585 | * |
f24b664d BM |
586 | * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special |
587 | * cases for the root node. | |
1da177e4 | 588 | * |
f24b664d | 589 | * NOTE: Real integer handles would allow for more verification |
44f6c012 | 590 | * and keep all pointers within this subsystem - however this introduces |
f24b664d BM |
591 | * more overhead and has not been necessary to this point. Drivers |
592 | * holding handles are typically notified before a node becomes invalid | |
593 | * due to a table unload. | |
d4913dc6 | 594 | * |
1da177e4 LT |
595 | ******************************************************************************/ |
596 | ||
f24b664d | 597 | struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle) |
1da177e4 LT |
598 | { |
599 | ||
4be44fcd | 600 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 601 | |
d4913dc6 BM |
602 | /* Parameter validation */ |
603 | ||
4119532c | 604 | if ((!handle) || (handle == ACPI_ROOT_OBJECT)) { |
1da177e4 LT |
605 | return (acpi_gbl_root_node); |
606 | } | |
607 | ||
608 | /* We can at least attempt to verify the handle */ | |
609 | ||
4be44fcd | 610 | if (ACPI_GET_DESCRIPTOR_TYPE(handle) != ACPI_DESC_TYPE_NAMED) { |
1da177e4 LT |
611 | return (NULL); |
612 | } | |
613 | ||
4119532c | 614 | return (ACPI_CAST_PTR(struct acpi_namespace_node, handle)); |
1da177e4 LT |
615 | } |
616 | ||
1da177e4 LT |
617 | /******************************************************************************* |
618 | * | |
619 | * FUNCTION: acpi_ns_terminate | |
620 | * | |
621 | * PARAMETERS: none | |
622 | * | |
623 | * RETURN: none | |
624 | * | |
44f6c012 | 625 | * DESCRIPTION: free memory allocated for namespace and ACPI table storage. |
1da177e4 LT |
626 | * |
627 | ******************************************************************************/ | |
628 | ||
4be44fcd | 629 | void acpi_ns_terminate(void) |
1da177e4 | 630 | { |
4be44fcd | 631 | union acpi_operand_object *obj_desc; |
1da177e4 | 632 | |
b229cf92 | 633 | ACPI_FUNCTION_TRACE(ns_terminate); |
1da177e4 LT |
634 | |
635 | /* | |
636 | * 1) Free the entire namespace -- all nodes and objects | |
637 | * | |
638 | * Delete all object descriptors attached to namepsace nodes | |
639 | */ | |
4be44fcd | 640 | acpi_ns_delete_namespace_subtree(acpi_gbl_root_node); |
1da177e4 LT |
641 | |
642 | /* Detach any objects attached to the root */ | |
643 | ||
4be44fcd | 644 | obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node); |
1da177e4 | 645 | if (obj_desc) { |
4be44fcd | 646 | acpi_ns_detach_object(acpi_gbl_root_node); |
1da177e4 LT |
647 | } |
648 | ||
4be44fcd | 649 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n")); |
1da177e4 LT |
650 | return_VOID; |
651 | } | |
652 | ||
1da177e4 LT |
653 | /******************************************************************************* |
654 | * | |
655 | * FUNCTION: acpi_ns_opens_scope | |
656 | * | |
ba494bee | 657 | * PARAMETERS: type - A valid namespace type |
1da177e4 LT |
658 | * |
659 | * RETURN: NEWSCOPE if the passed type "opens a name scope" according | |
660 | * to the ACPI specification, else 0 | |
661 | * | |
662 | ******************************************************************************/ | |
663 | ||
4be44fcd | 664 | u32 acpi_ns_opens_scope(acpi_object_type type) |
1da177e4 | 665 | { |
0e770b32 | 666 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 667 | |
0e770b32 | 668 | if (type > ACPI_TYPE_LOCAL_MAX) { |
52fc0b02 | 669 | |
1da177e4 LT |
670 | /* type code out of range */ |
671 | ||
f6a22b0b | 672 | ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type)); |
0e770b32 | 673 | return (ACPI_NS_NORMAL); |
1da177e4 LT |
674 | } |
675 | ||
0e770b32 | 676 | return (((u32)acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE); |
1da177e4 LT |
677 | } |
678 | ||
1da177e4 LT |
679 | /******************************************************************************* |
680 | * | |
4119532c | 681 | * FUNCTION: acpi_ns_get_node |
1da177e4 | 682 | * |
ba494bee | 683 | * PARAMETERS: *pathname - Name to be found, in external (ASL) format. The |
1da177e4 LT |
684 | * \ (backslash) and ^ (carat) prefixes, and the |
685 | * . (period) to separate segments are supported. | |
4119532c | 686 | * prefix_node - Root of subtree to be searched, or NS_ALL for the |
73a3090a | 687 | * root of the name space. If Name is fully |
1da177e4 LT |
688 | * qualified (first s8 is '\'), the passed value |
689 | * of Scope will not be accessed. | |
ba494bee | 690 | * flags - Used to indicate whether to perform upsearch or |
1da177e4 LT |
691 | * not. |
692 | * return_node - Where the Node is returned | |
693 | * | |
694 | * DESCRIPTION: Look up a name relative to a given scope and return the | |
73a3090a | 695 | * corresponding Node. NOTE: Scope can be null. |
1da177e4 LT |
696 | * |
697 | * MUTEX: Locks namespace | |
698 | * | |
699 | ******************************************************************************/ | |
700 | ||
701 | acpi_status | |
4119532c | 702 | acpi_ns_get_node(struct acpi_namespace_node *prefix_node, |
4b8ed631 | 703 | const char *pathname, |
4119532c | 704 | u32 flags, struct acpi_namespace_node **return_node) |
1da177e4 | 705 | { |
4be44fcd LB |
706 | union acpi_generic_state scope_info; |
707 | acpi_status status; | |
4119532c | 708 | char *internal_path; |
1da177e4 | 709 | |
5853a9f6 | 710 | ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname)); |
1da177e4 | 711 | |
4119532c BM |
712 | if (!pathname) { |
713 | *return_node = prefix_node; | |
714 | if (!prefix_node) { | |
715 | *return_node = acpi_gbl_root_node; | |
716 | } | |
717 | return_ACPI_STATUS(AE_OK); | |
718 | } | |
52fc0b02 | 719 | |
4119532c | 720 | /* Convert path to internal representation */ |
1da177e4 | 721 | |
4119532c BM |
722 | status = acpi_ns_internalize_name(pathname, &internal_path); |
723 | if (ACPI_FAILURE(status)) { | |
724 | return_ACPI_STATUS(status); | |
1da177e4 LT |
725 | } |
726 | ||
727 | /* Must lock namespace during lookup */ | |
728 | ||
4be44fcd LB |
729 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
730 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
731 | goto cleanup; |
732 | } | |
733 | ||
734 | /* Setup lookup scope (search starting point) */ | |
735 | ||
4119532c | 736 | scope_info.scope.node = prefix_node; |
1da177e4 LT |
737 | |
738 | /* Lookup the name in the namespace */ | |
739 | ||
4119532c BM |
740 | status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY, |
741 | ACPI_IMODE_EXECUTE, | |
742 | (flags | ACPI_NS_DONT_OPEN_SCOPE), NULL, | |
743 | return_node); | |
4be44fcd | 744 | if (ACPI_FAILURE(status)) { |
7bcc06e8 | 745 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s, %s\n", |
4119532c | 746 | pathname, acpi_format_exception(status))); |
1da177e4 LT |
747 | } |
748 | ||
4be44fcd | 749 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 | 750 | |
4be44fcd | 751 | cleanup: |
4119532c | 752 | ACPI_FREE(internal_path); |
4be44fcd | 753 | return_ACPI_STATUS(status); |
1da177e4 | 754 | } |