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d59b8ecd BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbxfload - Table load/unload external interfaces | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
d59b8ecd BM |
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 | ||
839e928f LZ |
44 | #define EXPORT_ACPI_INTERFACES |
45 | ||
d59b8ecd BM |
46 | #include <acpi/acpi.h> |
47 | #include "accommon.h" | |
48 | #include "acnamesp.h" | |
49 | #include "actables.h" | |
50 | ||
51 | #define _COMPONENT ACPI_TABLES | |
52 | ACPI_MODULE_NAME("tbxfload") | |
53 | ||
d59b8ecd BM |
54 | /******************************************************************************* |
55 | * | |
56 | * FUNCTION: acpi_load_tables | |
57 | * | |
58 | * PARAMETERS: None | |
59 | * | |
60 | * RETURN: Status | |
61 | * | |
62 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
63 | * | |
64 | ******************************************************************************/ | |
45c9f78b | 65 | acpi_status __init acpi_load_tables(void) |
d59b8ecd BM |
66 | { |
67 | acpi_status status; | |
68 | ||
69 | ACPI_FUNCTION_TRACE(acpi_load_tables); | |
70 | ||
71 | /* Load the namespace from the tables */ | |
72 | ||
73 | status = acpi_tb_load_namespace(); | |
93cdafa0 BM |
74 | |
75 | /* Don't let single failures abort the load */ | |
76 | ||
77 | if (status == AE_CTRL_TERMINATE) { | |
78 | status = AE_OK; | |
79 | } | |
80 | ||
d59b8ecd BM |
81 | if (ACPI_FAILURE(status)) { |
82 | ACPI_EXCEPTION((AE_INFO, status, | |
83 | "While loading namespace from ACPI tables")); | |
84 | } | |
85 | ||
86 | return_ACPI_STATUS(status); | |
87 | } | |
88 | ||
d21f600b | 89 | ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables) |
d59b8ecd BM |
90 | |
91 | /******************************************************************************* | |
92 | * | |
93 | * FUNCTION: acpi_tb_load_namespace | |
94 | * | |
95 | * PARAMETERS: None | |
96 | * | |
97 | * RETURN: Status | |
98 | * | |
99 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in | |
100 | * the RSDT/XSDT. | |
101 | * | |
102 | ******************************************************************************/ | |
93cdafa0 | 103 | acpi_status acpi_tb_load_namespace(void) |
d59b8ecd BM |
104 | { |
105 | acpi_status status; | |
106 | u32 i; | |
107 | struct acpi_table_header *new_dsdt; | |
3c0503dd | 108 | struct acpi_table_desc *table; |
4712f71b BM |
109 | u32 tables_loaded = 0; |
110 | u32 tables_failed = 0; | |
d59b8ecd BM |
111 | |
112 | ACPI_FUNCTION_TRACE(tb_load_namespace); | |
113 | ||
114 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
115 | ||
116 | /* | |
117 | * Load the namespace. The DSDT is required, but any SSDT and | |
118 | * PSDT tables are optional. Verify the DSDT. | |
119 | */ | |
3c0503dd BM |
120 | table = &acpi_gbl_root_table_list.tables[acpi_gbl_dsdt_index]; |
121 | ||
d59b8ecd | 122 | if (!acpi_gbl_root_table_list.current_table_count || |
3c0503dd BM |
123 | !ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_DSDT) || |
124 | ACPI_FAILURE(acpi_tb_validate_table(table))) { | |
d59b8ecd BM |
125 | status = AE_NO_ACPI_TABLES; |
126 | goto unlock_and_exit; | |
127 | } | |
128 | ||
129 | /* | |
130 | * Save the DSDT pointer for simple access. This is the mapped memory | |
131 | * address. We must take care here because the address of the .Tables | |
132 | * array can change dynamically as tables are loaded at run-time. Note: | |
7f9fc99c | 133 | * .Pointer field is not validated until after call to acpi_tb_validate_table. |
d59b8ecd | 134 | */ |
3c0503dd | 135 | acpi_gbl_DSDT = table->pointer; |
d59b8ecd BM |
136 | |
137 | /* | |
138 | * Optionally copy the entire DSDT to local memory (instead of simply | |
139 | * mapping it.) There are some BIOSs that corrupt or replace the original | |
140 | * DSDT, creating the need for this option. Default is FALSE, do not copy | |
141 | * the DSDT. | |
142 | */ | |
143 | if (acpi_gbl_copy_dsdt_locally) { | |
8ec3f459 | 144 | new_dsdt = acpi_tb_copy_dsdt(acpi_gbl_dsdt_index); |
d59b8ecd BM |
145 | if (new_dsdt) { |
146 | acpi_gbl_DSDT = new_dsdt; | |
147 | } | |
148 | } | |
149 | ||
150 | /* | |
151 | * Save the original DSDT header for detection of table corruption | |
152 | * and/or replacement of the DSDT from outside the OS. | |
153 | */ | |
4fa4616e BM |
154 | memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT, |
155 | sizeof(struct acpi_table_header)); | |
d59b8ecd BM |
156 | |
157 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
158 | ||
159 | /* Load and parse tables */ | |
160 | ||
8ec3f459 | 161 | status = acpi_ns_load_table(acpi_gbl_dsdt_index, acpi_gbl_root_node); |
d59b8ecd | 162 | if (ACPI_FAILURE(status)) { |
4712f71b BM |
163 | ACPI_EXCEPTION((AE_INFO, status, "[DSDT] table load failed")); |
164 | tables_failed++; | |
165 | } else { | |
166 | tables_loaded++; | |
d59b8ecd BM |
167 | } |
168 | ||
169 | /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ | |
170 | ||
171 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
172 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { | |
3c0503dd BM |
173 | table = &acpi_gbl_root_table_list.tables[i]; |
174 | ||
c04e1fb4 | 175 | if (!acpi_gbl_root_table_list.tables[i].address || |
3c0503dd BM |
176 | (!ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_SSDT) |
177 | && !ACPI_COMPARE_NAME(table->signature.ascii, | |
178 | ACPI_SIG_PSDT) | |
179 | && !ACPI_COMPARE_NAME(table->signature.ascii, | |
180 | ACPI_SIG_OSDT)) | |
181 | || ACPI_FAILURE(acpi_tb_validate_table(table))) { | |
d59b8ecd BM |
182 | continue; |
183 | } | |
184 | ||
d59b8ecd BM |
185 | /* Ignore errors while loading tables, get as many as possible */ |
186 | ||
187 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
4712f71b BM |
188 | status = acpi_ns_load_table(i, acpi_gbl_root_node); |
189 | if (ACPI_FAILURE(status)) { | |
190 | ACPI_EXCEPTION((AE_INFO, status, | |
3c0503dd BM |
191 | "(%4.4s:%8.8s) while loading table", |
192 | table->signature.ascii, | |
193 | table->pointer->oem_table_id)); | |
1fad8738 | 194 | |
4712f71b | 195 | tables_failed++; |
3c0503dd BM |
196 | |
197 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
198 | "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n", | |
199 | table->signature.ascii, | |
200 | table->pointer->oem_table_id)); | |
4712f71b BM |
201 | } else { |
202 | tables_loaded++; | |
203 | } | |
204 | ||
d59b8ecd BM |
205 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
206 | } | |
207 | ||
4712f71b BM |
208 | if (!tables_failed) { |
209 | ACPI_INFO((AE_INFO, | |
2ba7379b | 210 | "%u ACPI AML tables successfully acquired and loaded\n", |
4712f71b BM |
211 | tables_loaded)); |
212 | } else { | |
213 | ACPI_ERROR((AE_INFO, | |
3c0503dd BM |
214 | "%u table load failures, %u successful", |
215 | tables_failed, tables_loaded)); | |
93cdafa0 BM |
216 | |
217 | /* Indicate at least one failure */ | |
218 | ||
219 | status = AE_CTRL_TERMINATE; | |
4712f71b | 220 | } |
d59b8ecd | 221 | |
10622bf8 | 222 | unlock_and_exit: |
d59b8ecd BM |
223 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
224 | return_ACPI_STATUS(status); | |
225 | } | |
226 | ||
caf4a15c LZ |
227 | /******************************************************************************* |
228 | * | |
229 | * FUNCTION: acpi_install_table | |
230 | * | |
231 | * PARAMETERS: address - Address of the ACPI table to be installed. | |
232 | * physical - Whether the address is a physical table | |
233 | * address or not | |
234 | * | |
235 | * RETURN: Status | |
236 | * | |
237 | * DESCRIPTION: Dynamically install an ACPI table. | |
238 | * Note: This function should only be invoked after | |
239 | * acpi_initialize_tables() and before acpi_load_tables(). | |
240 | * | |
241 | ******************************************************************************/ | |
242 | ||
243 | acpi_status __init | |
244 | acpi_install_table(acpi_physical_address address, u8 physical) | |
245 | { | |
246 | acpi_status status; | |
247 | u8 flags; | |
248 | u32 table_index; | |
249 | ||
250 | ACPI_FUNCTION_TRACE(acpi_install_table); | |
251 | ||
252 | if (physical) { | |
ed6f1d44 | 253 | flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL; |
dc00203b ZR |
254 | } else { |
255 | flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL; | |
caf4a15c LZ |
256 | } |
257 | ||
ed6f1d44 BM |
258 | status = acpi_tb_install_standard_table(address, flags, |
259 | FALSE, FALSE, &table_index); | |
caf4a15c LZ |
260 | |
261 | return_ACPI_STATUS(status); | |
262 | } | |
263 | ||
264 | ACPI_EXPORT_SYMBOL_INIT(acpi_install_table) | |
265 | ||
f60d8181 BM |
266 | /******************************************************************************* |
267 | * | |
268 | * FUNCTION: acpi_load_table | |
269 | * | |
270 | * PARAMETERS: table - Pointer to a buffer containing the ACPI | |
271 | * table to be loaded. | |
272 | * | |
273 | * RETURN: Status | |
274 | * | |
275 | * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must | |
276 | * be a valid ACPI table with a valid ACPI table header. | |
277 | * Note1: Mainly intended to support hotplug addition of SSDTs. | |
691fda50 | 278 | * Note2: Does not copy the incoming table. User is responsible |
f60d8181 BM |
279 | * to ensure that the table is not deleted or unmapped. |
280 | * | |
281 | ******************************************************************************/ | |
f60d8181 BM |
282 | acpi_status acpi_load_table(struct acpi_table_header *table) |
283 | { | |
284 | acpi_status status; | |
f60d8181 BM |
285 | u32 table_index; |
286 | ||
287 | ACPI_FUNCTION_TRACE(acpi_load_table); | |
288 | ||
289 | /* Parameter validation */ | |
290 | ||
291 | if (!table) { | |
292 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
293 | } | |
294 | ||
f60d8181 BM |
295 | /* Must acquire the interpreter lock during this operation */ |
296 | ||
297 | status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); | |
298 | if (ACPI_FAILURE(status)) { | |
299 | return_ACPI_STATUS(status); | |
300 | } | |
301 | ||
302 | /* Install the table and load it into the namespace */ | |
303 | ||
304 | ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:")); | |
86dfc6f3 | 305 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
ed6f1d44 BM |
306 | |
307 | status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table), | |
308 | ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, | |
309 | TRUE, FALSE, &table_index); | |
310 | ||
86dfc6f3 LZ |
311 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
312 | if (ACPI_FAILURE(status)) { | |
313 | goto unlock_and_exit; | |
314 | } | |
315 | ||
316 | /* | |
317 | * Note: Now table is "INSTALLED", it must be validated before | |
318 | * using. | |
319 | */ | |
320 | status = | |
321 | acpi_tb_validate_table(&acpi_gbl_root_table_list. | |
322 | tables[table_index]); | |
f60d8181 BM |
323 | if (ACPI_FAILURE(status)) { |
324 | goto unlock_and_exit; | |
325 | } | |
326 | ||
327 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); | |
328 | ||
329 | /* Invoke table handler if present */ | |
330 | ||
331 | if (acpi_gbl_table_handler) { | |
332 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
333 | acpi_gbl_table_handler_context); | |
334 | } | |
335 | ||
10622bf8 | 336 | unlock_and_exit: |
f60d8181 BM |
337 | (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); |
338 | return_ACPI_STATUS(status); | |
339 | } | |
340 | ||
341 | ACPI_EXPORT_SYMBOL(acpi_load_table) | |
342 | ||
343 | /******************************************************************************* | |
344 | * | |
345 | * FUNCTION: acpi_unload_parent_table | |
346 | * | |
347 | * PARAMETERS: object - Handle to any namespace object owned by | |
348 | * the table to be unloaded | |
349 | * | |
350 | * RETURN: Status | |
351 | * | |
352 | * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads | |
353 | * the table and deletes all namespace objects associated with | |
354 | * that table. Unloading of the DSDT is not allowed. | |
355 | * Note: Mainly intended to support hotplug removal of SSDTs. | |
356 | * | |
357 | ******************************************************************************/ | |
358 | acpi_status acpi_unload_parent_table(acpi_handle object) | |
359 | { | |
360 | struct acpi_namespace_node *node = | |
361 | ACPI_CAST_PTR(struct acpi_namespace_node, object); | |
362 | acpi_status status = AE_NOT_EXIST; | |
363 | acpi_owner_id owner_id; | |
364 | u32 i; | |
365 | ||
366 | ACPI_FUNCTION_TRACE(acpi_unload_parent_table); | |
367 | ||
368 | /* Parameter validation */ | |
369 | ||
370 | if (!object) { | |
371 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
372 | } | |
373 | ||
374 | /* | |
375 | * The node owner_id is currently the same as the parent table ID. | |
376 | * However, this could change in the future. | |
377 | */ | |
378 | owner_id = node->owner_id; | |
379 | if (!owner_id) { | |
380 | ||
381 | /* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */ | |
382 | ||
383 | return_ACPI_STATUS(AE_TYPE); | |
384 | } | |
385 | ||
386 | /* Must acquire the interpreter lock during this operation */ | |
387 | ||
388 | status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); | |
389 | if (ACPI_FAILURE(status)) { | |
390 | return_ACPI_STATUS(status); | |
391 | } | |
392 | ||
393 | /* Find the table in the global table list */ | |
394 | ||
395 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { | |
396 | if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) { | |
397 | continue; | |
398 | } | |
399 | ||
400 | /* | |
401 | * Allow unload of SSDT and OEMx tables only. Do not allow unload | |
402 | * of the DSDT. No other types of tables should get here, since | |
403 | * only these types can contain AML and thus are the only types | |
404 | * that can create namespace objects. | |
405 | */ | |
406 | if (ACPI_COMPARE_NAME | |
407 | (acpi_gbl_root_table_list.tables[i].signature.ascii, | |
408 | ACPI_SIG_DSDT)) { | |
409 | status = AE_TYPE; | |
410 | break; | |
411 | } | |
412 | ||
413 | /* Ensure the table is actually loaded */ | |
414 | ||
415 | if (!acpi_tb_is_table_loaded(i)) { | |
416 | status = AE_NOT_EXIST; | |
417 | break; | |
418 | } | |
419 | ||
420 | /* Invoke table handler if present */ | |
421 | ||
422 | if (acpi_gbl_table_handler) { | |
423 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
424 | acpi_gbl_root_table_list. | |
425 | tables[i].pointer, | |
426 | acpi_gbl_table_handler_context); | |
427 | } | |
428 | ||
429 | /* | |
430 | * Delete all namespace objects owned by this table. Note that | |
431 | * these objects can appear anywhere in the namespace by virtue | |
432 | * of the AML "Scope" operator. Thus, we need to track ownership | |
433 | * by an ID, not simply a position within the hierarchy. | |
434 | */ | |
435 | status = acpi_tb_delete_namespace_by_owner(i); | |
436 | if (ACPI_FAILURE(status)) { | |
437 | break; | |
438 | } | |
439 | ||
440 | status = acpi_tb_release_owner_id(i); | |
441 | acpi_tb_set_table_loaded_flag(i, FALSE); | |
442 | break; | |
443 | } | |
444 | ||
445 | (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); | |
446 | return_ACPI_STATUS(status); | |
447 | } | |
448 | ||
449 | ACPI_EXPORT_SYMBOL(acpi_unload_parent_table) |