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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbinstal - ACPI table installation and removal | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/actables.h> | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_TABLES | |
50 | ACPI_MODULE_NAME ("tbinstal") | |
51 | ||
52 | ||
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_tb_match_signature | |
56 | * | |
57 | * PARAMETERS: Signature - Table signature to match | |
58 | * table_info - Return data | |
59 | * | |
60 | * RETURN: Status | |
61 | * | |
62 | * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned" | |
63 | * tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match. | |
64 | * | |
65 | ******************************************************************************/ | |
66 | ||
67 | acpi_status | |
68 | acpi_tb_match_signature ( | |
69 | char *signature, | |
70 | struct acpi_table_desc *table_info, | |
71 | u8 search_type) | |
72 | { | |
73 | acpi_native_uint i; | |
74 | ||
75 | ||
76 | ACPI_FUNCTION_TRACE ("tb_match_signature"); | |
77 | ||
78 | ||
79 | /* | |
80 | * Search for a signature match among the known table types | |
81 | */ | |
82 | for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) { | |
83 | if (!(acpi_gbl_table_data[i].flags & search_type)) { | |
84 | continue; | |
85 | } | |
86 | ||
87 | if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature, | |
88 | acpi_gbl_table_data[i].sig_length)) { | |
89 | /* Found a signature match, return index if requested */ | |
90 | ||
91 | if (table_info) { | |
92 | table_info->type = (u8) i; | |
93 | } | |
94 | ||
95 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, | |
96 | "Table [%4.4s] is an ACPI table consumed by the core subsystem\n", | |
97 | (char *) acpi_gbl_table_data[i].signature)); | |
98 | ||
99 | return_ACPI_STATUS (AE_OK); | |
100 | } | |
101 | } | |
102 | ||
103 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, | |
104 | "Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n", | |
105 | (char *) signature)); | |
106 | ||
107 | return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED); | |
108 | } | |
109 | ||
110 | ||
111 | /******************************************************************************* | |
112 | * | |
113 | * FUNCTION: acpi_tb_install_table | |
114 | * | |
115 | * PARAMETERS: table_info - Return value from acpi_tb_get_table_body | |
116 | * | |
117 | * RETURN: Status | |
118 | * | |
119 | * DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must | |
120 | * already be loaded and validated. | |
121 | * Install the table into the global data structs. | |
122 | * | |
123 | ******************************************************************************/ | |
124 | ||
125 | acpi_status | |
126 | acpi_tb_install_table ( | |
127 | struct acpi_table_desc *table_info) | |
128 | { | |
129 | acpi_status status; | |
130 | ||
131 | ACPI_FUNCTION_TRACE ("tb_install_table"); | |
132 | ||
133 | ||
134 | /* Lock tables while installing */ | |
135 | ||
136 | status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES); | |
137 | if (ACPI_FAILURE (status)) { | |
138 | ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n", | |
139 | table_info->pointer->signature, acpi_format_exception (status))); | |
140 | return_ACPI_STATUS (status); | |
141 | } | |
142 | ||
143 | /* Install the table into the global data structure */ | |
144 | ||
145 | status = acpi_tb_init_table_descriptor (table_info->type, table_info); | |
146 | if (ACPI_FAILURE (status)) { | |
147 | ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n", | |
148 | table_info->pointer->signature, acpi_format_exception (status))); | |
149 | } | |
150 | ||
151 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n", | |
152 | acpi_gbl_table_data[table_info->type].name, table_info->pointer)); | |
153 | ||
154 | (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); | |
155 | return_ACPI_STATUS (status); | |
156 | } | |
157 | ||
158 | ||
159 | /******************************************************************************* | |
160 | * | |
161 | * FUNCTION: acpi_tb_recognize_table | |
162 | * | |
163 | * PARAMETERS: table_info - Return value from acpi_tb_get_table_body | |
164 | * | |
165 | * RETURN: Status | |
166 | * | |
167 | * DESCRIPTION: Check a table signature for a match against known table types | |
168 | * | |
169 | * NOTE: All table pointers are validated as follows: | |
170 | * 1) Table pointer must point to valid physical memory | |
171 | * 2) Signature must be 4 ASCII chars, even if we don't recognize the | |
172 | * name | |
173 | * 3) Table must be readable for length specified in the header | |
174 | * 4) Table checksum must be valid (with the exception of the FACS | |
175 | * which has no checksum for some odd reason) | |
176 | * | |
177 | ******************************************************************************/ | |
178 | ||
179 | acpi_status | |
180 | acpi_tb_recognize_table ( | |
181 | struct acpi_table_desc *table_info, | |
182 | u8 search_type) | |
183 | { | |
184 | struct acpi_table_header *table_header; | |
185 | acpi_status status; | |
186 | ||
187 | ||
188 | ACPI_FUNCTION_TRACE ("tb_recognize_table"); | |
189 | ||
190 | ||
191 | /* Ensure that we have a valid table pointer */ | |
192 | ||
193 | table_header = (struct acpi_table_header *) table_info->pointer; | |
194 | if (!table_header) { | |
195 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
196 | } | |
197 | ||
198 | /* | |
199 | * We only "recognize" a limited number of ACPI tables -- namely, the | |
200 | * ones that are used by the subsystem (DSDT, FADT, etc.) | |
201 | * | |
202 | * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized. | |
203 | * This can be any one of many valid ACPI tables, it just isn't one of | |
204 | * the tables that is consumed by the core subsystem | |
205 | */ | |
206 | status = acpi_tb_match_signature (table_header->signature, table_info, search_type); | |
207 | if (ACPI_FAILURE (status)) { | |
208 | return_ACPI_STATUS (status); | |
209 | } | |
210 | ||
211 | status = acpi_tb_validate_table_header (table_header); | |
212 | if (ACPI_FAILURE (status)) { | |
213 | return_ACPI_STATUS (status); | |
214 | } | |
215 | ||
216 | /* Return the table type and length via the info struct */ | |
217 | ||
218 | table_info->length = (acpi_size) table_header->length; | |
219 | ||
220 | return_ACPI_STATUS (status); | |
221 | } | |
222 | ||
223 | ||
224 | /******************************************************************************* | |
225 | * | |
226 | * FUNCTION: acpi_tb_init_table_descriptor | |
227 | * | |
228 | * PARAMETERS: table_type - The type of the table | |
229 | * table_info - A table info struct | |
230 | * | |
231 | * RETURN: None. | |
232 | * | |
233 | * DESCRIPTION: Install a table into the global data structs. | |
234 | * | |
235 | ******************************************************************************/ | |
236 | ||
237 | acpi_status | |
238 | acpi_tb_init_table_descriptor ( | |
239 | acpi_table_type table_type, | |
240 | struct acpi_table_desc *table_info) | |
241 | { | |
242 | struct acpi_table_list *list_head; | |
243 | struct acpi_table_desc *table_desc; | |
244 | ||
245 | ||
246 | ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type); | |
247 | ||
248 | ||
249 | /* Allocate a descriptor for this table */ | |
250 | ||
251 | table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc)); | |
252 | if (!table_desc) { | |
253 | return_ACPI_STATUS (AE_NO_MEMORY); | |
254 | } | |
255 | ||
256 | /* | |
257 | * Install the table into the global data structure | |
258 | */ | |
259 | list_head = &acpi_gbl_table_lists[table_type]; | |
260 | ||
261 | /* | |
262 | * Two major types of tables: 1) Only one instance is allowed. This | |
263 | * includes most ACPI tables such as the DSDT. 2) Multiple instances of | |
264 | * the table are allowed. This includes SSDT and PSDTs. | |
265 | */ | |
266 | if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) { | |
267 | /* | |
268 | * Only one table allowed, and a table has alread been installed | |
269 | * at this location, so return an error. | |
270 | */ | |
271 | if (list_head->next) { | |
272 | ACPI_MEM_FREE (table_desc); | |
273 | return_ACPI_STATUS (AE_ALREADY_EXISTS); | |
274 | } | |
275 | ||
276 | table_desc->next = list_head->next; | |
277 | list_head->next = table_desc; | |
278 | ||
279 | if (table_desc->next) { | |
280 | table_desc->next->prev = table_desc; | |
281 | } | |
282 | ||
283 | list_head->count++; | |
284 | } | |
285 | else { | |
286 | /* | |
287 | * Link the new table in to the list of tables of this type. | |
288 | * Insert at the end of the list, order IS IMPORTANT. | |
289 | * | |
290 | * table_desc->Prev & Next are already NULL from calloc() | |
291 | */ | |
292 | list_head->count++; | |
293 | ||
294 | if (!list_head->next) { | |
295 | list_head->next = table_desc; | |
296 | } | |
297 | else { | |
298 | table_desc->next = list_head->next; | |
299 | ||
300 | while (table_desc->next->next) { | |
301 | table_desc->next = table_desc->next->next; | |
302 | } | |
303 | ||
304 | table_desc->next->next = table_desc; | |
305 | table_desc->prev = table_desc->next; | |
306 | table_desc->next = NULL; | |
307 | } | |
308 | } | |
309 | ||
310 | /* Finish initialization of the table descriptor */ | |
311 | ||
312 | table_desc->type = (u8) table_type; | |
313 | table_desc->pointer = table_info->pointer; | |
314 | table_desc->length = table_info->length; | |
315 | table_desc->allocation = table_info->allocation; | |
316 | table_desc->aml_start = (u8 *) (table_desc->pointer + 1), | |
317 | table_desc->aml_length = (u32) (table_desc->length - | |
318 | (u32) sizeof (struct acpi_table_header)); | |
319 | table_desc->table_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_TABLE); | |
320 | table_desc->loaded_into_namespace = FALSE; | |
321 | ||
322 | /* | |
323 | * Set the appropriate global pointer (if there is one) to point to the | |
324 | * newly installed table | |
325 | */ | |
326 | if (acpi_gbl_table_data[table_type].global_ptr) { | |
327 | *(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer; | |
328 | } | |
329 | ||
330 | /* Return Data */ | |
331 | ||
332 | table_info->table_id = table_desc->table_id; | |
333 | table_info->installed_desc = table_desc; | |
334 | ||
335 | return_ACPI_STATUS (AE_OK); | |
336 | } | |
337 | ||
338 | ||
339 | /******************************************************************************* | |
340 | * | |
341 | * FUNCTION: acpi_tb_delete_all_tables | |
342 | * | |
343 | * PARAMETERS: None. | |
344 | * | |
345 | * RETURN: None. | |
346 | * | |
347 | * DESCRIPTION: Delete all internal ACPI tables | |
348 | * | |
349 | ******************************************************************************/ | |
350 | ||
351 | void | |
352 | acpi_tb_delete_all_tables (void) | |
353 | { | |
354 | acpi_table_type type; | |
355 | ||
356 | ||
357 | /* | |
358 | * Free memory allocated for ACPI tables | |
359 | * Memory can either be mapped or allocated | |
360 | */ | |
361 | for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) { | |
362 | acpi_tb_delete_tables_by_type (type); | |
363 | } | |
364 | } | |
365 | ||
366 | ||
367 | /******************************************************************************* | |
368 | * | |
369 | * FUNCTION: acpi_tb_delete_tables_by_type | |
370 | * | |
371 | * PARAMETERS: Type - The table type to be deleted | |
372 | * | |
373 | * RETURN: None. | |
374 | * | |
375 | * DESCRIPTION: Delete an internal ACPI table | |
376 | * Locks the ACPI table mutex | |
377 | * | |
378 | ******************************************************************************/ | |
379 | ||
380 | void | |
381 | acpi_tb_delete_tables_by_type ( | |
382 | acpi_table_type type) | |
383 | { | |
384 | struct acpi_table_desc *table_desc; | |
385 | u32 count; | |
386 | u32 i; | |
387 | ||
388 | ||
389 | ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type); | |
390 | ||
391 | ||
392 | if (type > ACPI_TABLE_MAX) { | |
393 | return_VOID; | |
394 | } | |
395 | ||
396 | if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) { | |
397 | return; | |
398 | } | |
399 | ||
400 | /* Clear the appropriate "typed" global table pointer */ | |
401 | ||
402 | switch (type) { | |
403 | case ACPI_TABLE_RSDP: | |
404 | acpi_gbl_RSDP = NULL; | |
405 | break; | |
406 | ||
407 | case ACPI_TABLE_DSDT: | |
408 | acpi_gbl_DSDT = NULL; | |
409 | break; | |
410 | ||
411 | case ACPI_TABLE_FADT: | |
412 | acpi_gbl_FADT = NULL; | |
413 | break; | |
414 | ||
415 | case ACPI_TABLE_FACS: | |
416 | acpi_gbl_FACS = NULL; | |
417 | break; | |
418 | ||
419 | case ACPI_TABLE_XSDT: | |
420 | acpi_gbl_XSDT = NULL; | |
421 | break; | |
422 | ||
423 | case ACPI_TABLE_SSDT: | |
424 | case ACPI_TABLE_PSDT: | |
425 | default: | |
426 | break; | |
427 | } | |
428 | ||
429 | /* | |
430 | * Free the table | |
431 | * 1) Get the head of the list | |
432 | */ | |
433 | table_desc = acpi_gbl_table_lists[type].next; | |
434 | count = acpi_gbl_table_lists[type].count; | |
435 | ||
436 | /* | |
437 | * 2) Walk the entire list, deleting both the allocated tables | |
438 | * and the table descriptors | |
439 | */ | |
440 | for (i = 0; i < count; i++) { | |
441 | table_desc = acpi_tb_uninstall_table (table_desc); | |
442 | } | |
443 | ||
444 | (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); | |
445 | return_VOID; | |
446 | } | |
447 | ||
448 | ||
449 | /******************************************************************************* | |
450 | * | |
451 | * FUNCTION: acpi_tb_delete_single_table | |
452 | * | |
453 | * PARAMETERS: table_info - A table info struct | |
454 | * | |
455 | * RETURN: None. | |
456 | * | |
457 | * DESCRIPTION: Low-level free for a single ACPI table. Handles cases where | |
458 | * the table was allocated a buffer or was mapped. | |
459 | * | |
460 | ******************************************************************************/ | |
461 | ||
462 | void | |
463 | acpi_tb_delete_single_table ( | |
464 | struct acpi_table_desc *table_desc) | |
465 | { | |
466 | ||
467 | /* Must have a valid table descriptor and pointer */ | |
468 | ||
469 | if ((!table_desc) || | |
470 | (!table_desc->pointer)) { | |
471 | return; | |
472 | } | |
473 | ||
474 | /* Valid table, determine type of memory allocation */ | |
475 | ||
476 | switch (table_desc->allocation) { | |
477 | case ACPI_MEM_NOT_ALLOCATED: | |
478 | break; | |
479 | ||
480 | case ACPI_MEM_ALLOCATED: | |
481 | ||
482 | ACPI_MEM_FREE (table_desc->pointer); | |
483 | break; | |
484 | ||
485 | case ACPI_MEM_MAPPED: | |
486 | ||
487 | acpi_os_unmap_memory (table_desc->pointer, table_desc->length); | |
488 | break; | |
489 | ||
490 | default: | |
491 | break; | |
492 | } | |
493 | } | |
494 | ||
495 | ||
496 | /******************************************************************************* | |
497 | * | |
498 | * FUNCTION: acpi_tb_uninstall_table | |
499 | * | |
500 | * PARAMETERS: table_info - A table info struct | |
501 | * | |
502 | * RETURN: Pointer to the next table in the list (of same type) | |
503 | * | |
504 | * DESCRIPTION: Free the memory associated with an internal ACPI table that | |
505 | * is either installed or has never been installed. | |
506 | * Table mutex should be locked. | |
507 | * | |
508 | ******************************************************************************/ | |
509 | ||
510 | struct acpi_table_desc * | |
511 | acpi_tb_uninstall_table ( | |
512 | struct acpi_table_desc *table_desc) | |
513 | { | |
514 | struct acpi_table_desc *next_desc; | |
515 | ||
516 | ||
517 | ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc); | |
518 | ||
519 | ||
520 | if (!table_desc) { | |
521 | return_PTR (NULL); | |
522 | } | |
523 | ||
524 | /* Unlink the descriptor from the doubly linked list */ | |
525 | ||
526 | if (table_desc->prev) { | |
527 | table_desc->prev->next = table_desc->next; | |
528 | } | |
529 | else { | |
530 | /* Is first on list, update list head */ | |
531 | ||
532 | acpi_gbl_table_lists[table_desc->type].next = table_desc->next; | |
533 | } | |
534 | ||
535 | if (table_desc->next) { | |
536 | table_desc->next->prev = table_desc->prev; | |
537 | } | |
538 | ||
539 | /* Free the memory allocated for the table itself */ | |
540 | ||
541 | acpi_tb_delete_single_table (table_desc); | |
542 | ||
543 | /* Free the table descriptor */ | |
544 | ||
545 | next_desc = table_desc->next; | |
546 | ACPI_MEM_FREE (table_desc); | |
547 | ||
548 | /* Return pointer to the next descriptor */ | |
549 | ||
550 | return_PTR (next_desc); | |
551 | } | |
552 | ||
553 |