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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" | |
cc82f18e | 50 | #include "acevents.h" |
d59b8ecd BM |
51 | |
52 | #define _COMPONENT ACPI_TABLES | |
53 | ACPI_MODULE_NAME("tbxfload") | |
54 | ||
d59b8ecd BM |
55 | /******************************************************************************* |
56 | * | |
57 | * FUNCTION: acpi_load_tables | |
58 | * | |
59 | * PARAMETERS: None | |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
63 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
64 | * | |
65 | ******************************************************************************/ | |
2368b1a1 | 66 | acpi_status ACPI_INIT_FUNCTION acpi_load_tables(void) |
d59b8ecd BM |
67 | { |
68 | acpi_status status; | |
69 | ||
70 | ACPI_FUNCTION_TRACE(acpi_load_tables); | |
71 | ||
cc82f18e LZ |
72 | /* |
73 | * Install the default operation region handlers. These are the | |
74 | * handlers that are defined by the ACPI specification to be | |
75 | * "always accessible" -- namely, system_memory, system_IO, and | |
76 | * PCI_Config. This also means that no _REG methods need to be | |
77 | * run for these address spaces. We need to have these handlers | |
78 | * installed before any AML code can be executed, especially any | |
79 | * module-level code (11/2015). | |
80 | * Note that we allow OSPMs to install their own region handlers | |
81 | * between acpi_initialize_subsystem() and acpi_load_tables() to use | |
82 | * their customized default region handlers. | |
83 | */ | |
5508df89 | 84 | status = acpi_ev_install_region_handlers(); |
78542058 | 85 | if (ACPI_FAILURE(status)) { |
5508df89 LZ |
86 | ACPI_EXCEPTION((AE_INFO, status, |
87 | "During Region initialization")); | |
88 | return_ACPI_STATUS(status); | |
cc82f18e LZ |
89 | } |
90 | ||
d59b8ecd BM |
91 | /* Load the namespace from the tables */ |
92 | ||
93 | status = acpi_tb_load_namespace(); | |
93cdafa0 BM |
94 | |
95 | /* Don't let single failures abort the load */ | |
96 | ||
97 | if (status == AE_CTRL_TERMINATE) { | |
98 | status = AE_OK; | |
99 | } | |
100 | ||
d59b8ecd BM |
101 | if (ACPI_FAILURE(status)) { |
102 | ACPI_EXCEPTION((AE_INFO, status, | |
103 | "While loading namespace from ACPI tables")); | |
104 | } | |
105 | ||
de56ba95 LZ |
106 | if (acpi_gbl_parse_table_as_term_list |
107 | || !acpi_gbl_group_module_level_code) { | |
5508df89 LZ |
108 | /* |
109 | * Initialize the objects that remain uninitialized. This | |
110 | * runs the executable AML that may be part of the | |
111 | * declaration of these objects: | |
112 | * operation_regions, buffer_fields, Buffers, and Packages. | |
113 | */ | |
114 | status = acpi_ns_initialize_objects(); | |
115 | if (ACPI_FAILURE(status)) { | |
116 | return_ACPI_STATUS(status); | |
117 | } | |
118 | } | |
119 | ||
120 | acpi_gbl_namespace_initialized = TRUE; | |
d59b8ecd BM |
121 | return_ACPI_STATUS(status); |
122 | } | |
123 | ||
d21f600b | 124 | ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables) |
d59b8ecd BM |
125 | |
126 | /******************************************************************************* | |
127 | * | |
128 | * FUNCTION: acpi_tb_load_namespace | |
129 | * | |
130 | * PARAMETERS: None | |
131 | * | |
132 | * RETURN: Status | |
133 | * | |
134 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in | |
135 | * the RSDT/XSDT. | |
136 | * | |
137 | ******************************************************************************/ | |
93cdafa0 | 138 | acpi_status acpi_tb_load_namespace(void) |
d59b8ecd BM |
139 | { |
140 | acpi_status status; | |
141 | u32 i; | |
142 | struct acpi_table_header *new_dsdt; | |
3c0503dd | 143 | struct acpi_table_desc *table; |
4712f71b BM |
144 | u32 tables_loaded = 0; |
145 | u32 tables_failed = 0; | |
d59b8ecd BM |
146 | |
147 | ACPI_FUNCTION_TRACE(tb_load_namespace); | |
148 | ||
149 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
150 | ||
151 | /* | |
152 | * Load the namespace. The DSDT is required, but any SSDT and | |
153 | * PSDT tables are optional. Verify the DSDT. | |
154 | */ | |
3c0503dd BM |
155 | table = &acpi_gbl_root_table_list.tables[acpi_gbl_dsdt_index]; |
156 | ||
d59b8ecd | 157 | if (!acpi_gbl_root_table_list.current_table_count || |
3c0503dd BM |
158 | !ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_DSDT) || |
159 | ACPI_FAILURE(acpi_tb_validate_table(table))) { | |
d59b8ecd BM |
160 | status = AE_NO_ACPI_TABLES; |
161 | goto unlock_and_exit; | |
162 | } | |
163 | ||
164 | /* | |
165 | * Save the DSDT pointer for simple access. This is the mapped memory | |
166 | * address. We must take care here because the address of the .Tables | |
167 | * array can change dynamically as tables are loaded at run-time. Note: | |
7f9fc99c | 168 | * .Pointer field is not validated until after call to acpi_tb_validate_table. |
d59b8ecd | 169 | */ |
3c0503dd | 170 | acpi_gbl_DSDT = table->pointer; |
d59b8ecd BM |
171 | |
172 | /* | |
173 | * Optionally copy the entire DSDT to local memory (instead of simply | |
174 | * mapping it.) There are some BIOSs that corrupt or replace the original | |
175 | * DSDT, creating the need for this option. Default is FALSE, do not copy | |
176 | * the DSDT. | |
177 | */ | |
178 | if (acpi_gbl_copy_dsdt_locally) { | |
8ec3f459 | 179 | new_dsdt = acpi_tb_copy_dsdt(acpi_gbl_dsdt_index); |
d59b8ecd BM |
180 | if (new_dsdt) { |
181 | acpi_gbl_DSDT = new_dsdt; | |
182 | } | |
183 | } | |
184 | ||
185 | /* | |
186 | * Save the original DSDT header for detection of table corruption | |
187 | * and/or replacement of the DSDT from outside the OS. | |
188 | */ | |
4fa4616e BM |
189 | memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT, |
190 | sizeof(struct acpi_table_header)); | |
d59b8ecd | 191 | |
d59b8ecd BM |
192 | /* Load and parse tables */ |
193 | ||
ac0f06eb | 194 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
8ec3f459 | 195 | status = acpi_ns_load_table(acpi_gbl_dsdt_index, acpi_gbl_root_node); |
ac0f06eb | 196 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
d59b8ecd | 197 | if (ACPI_FAILURE(status)) { |
4712f71b BM |
198 | ACPI_EXCEPTION((AE_INFO, status, "[DSDT] table load failed")); |
199 | tables_failed++; | |
200 | } else { | |
201 | tables_loaded++; | |
d59b8ecd BM |
202 | } |
203 | ||
204 | /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ | |
205 | ||
d59b8ecd | 206 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { |
3c0503dd BM |
207 | table = &acpi_gbl_root_table_list.tables[i]; |
208 | ||
c04e1fb4 | 209 | if (!acpi_gbl_root_table_list.tables[i].address || |
3c0503dd BM |
210 | (!ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_SSDT) |
211 | && !ACPI_COMPARE_NAME(table->signature.ascii, | |
212 | ACPI_SIG_PSDT) | |
213 | && !ACPI_COMPARE_NAME(table->signature.ascii, | |
214 | ACPI_SIG_OSDT)) | |
215 | || ACPI_FAILURE(acpi_tb_validate_table(table))) { | |
d59b8ecd BM |
216 | continue; |
217 | } | |
218 | ||
d59b8ecd BM |
219 | /* Ignore errors while loading tables, get as many as possible */ |
220 | ||
221 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
4712f71b | 222 | status = acpi_ns_load_table(i, acpi_gbl_root_node); |
ac0f06eb | 223 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
4712f71b BM |
224 | if (ACPI_FAILURE(status)) { |
225 | ACPI_EXCEPTION((AE_INFO, status, | |
3c0503dd BM |
226 | "(%4.4s:%8.8s) while loading table", |
227 | table->signature.ascii, | |
228 | table->pointer->oem_table_id)); | |
1fad8738 | 229 | |
4712f71b | 230 | tables_failed++; |
3c0503dd BM |
231 | |
232 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
233 | "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n", | |
234 | table->signature.ascii, | |
235 | table->pointer->oem_table_id)); | |
4712f71b BM |
236 | } else { |
237 | tables_loaded++; | |
238 | } | |
d59b8ecd BM |
239 | } |
240 | ||
4712f71b | 241 | if (!tables_failed) { |
05fb04b5 | 242 | ACPI_INFO(("%u ACPI AML tables successfully acquired and loaded\n", tables_loaded)); |
4712f71b BM |
243 | } else { |
244 | ACPI_ERROR((AE_INFO, | |
3c0503dd BM |
245 | "%u table load failures, %u successful", |
246 | tables_failed, tables_loaded)); | |
93cdafa0 BM |
247 | |
248 | /* Indicate at least one failure */ | |
249 | ||
250 | status = AE_CTRL_TERMINATE; | |
4712f71b | 251 | } |
d59b8ecd | 252 | |
10622bf8 | 253 | unlock_and_exit: |
d59b8ecd BM |
254 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
255 | return_ACPI_STATUS(status); | |
256 | } | |
257 | ||
caf4a15c LZ |
258 | /******************************************************************************* |
259 | * | |
260 | * FUNCTION: acpi_install_table | |
261 | * | |
262 | * PARAMETERS: address - Address of the ACPI table to be installed. | |
263 | * physical - Whether the address is a physical table | |
264 | * address or not | |
265 | * | |
266 | * RETURN: Status | |
267 | * | |
268 | * DESCRIPTION: Dynamically install an ACPI table. | |
269 | * Note: This function should only be invoked after | |
270 | * acpi_initialize_tables() and before acpi_load_tables(). | |
271 | * | |
272 | ******************************************************************************/ | |
273 | ||
2368b1a1 | 274 | acpi_status ACPI_INIT_FUNCTION |
caf4a15c LZ |
275 | acpi_install_table(acpi_physical_address address, u8 physical) |
276 | { | |
277 | acpi_status status; | |
278 | u8 flags; | |
279 | u32 table_index; | |
280 | ||
281 | ACPI_FUNCTION_TRACE(acpi_install_table); | |
282 | ||
283 | if (physical) { | |
ed6f1d44 | 284 | flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL; |
dc00203b ZR |
285 | } else { |
286 | flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL; | |
caf4a15c LZ |
287 | } |
288 | ||
ed6f1d44 BM |
289 | status = acpi_tb_install_standard_table(address, flags, |
290 | FALSE, FALSE, &table_index); | |
caf4a15c LZ |
291 | |
292 | return_ACPI_STATUS(status); | |
293 | } | |
294 | ||
295 | ACPI_EXPORT_SYMBOL_INIT(acpi_install_table) | |
296 | ||
f60d8181 BM |
297 | /******************************************************************************* |
298 | * | |
299 | * FUNCTION: acpi_load_table | |
300 | * | |
301 | * PARAMETERS: table - Pointer to a buffer containing the ACPI | |
302 | * table to be loaded. | |
303 | * | |
304 | * RETURN: Status | |
305 | * | |
306 | * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must | |
307 | * be a valid ACPI table with a valid ACPI table header. | |
308 | * Note1: Mainly intended to support hotplug addition of SSDTs. | |
691fda50 | 309 | * Note2: Does not copy the incoming table. User is responsible |
f60d8181 BM |
310 | * to ensure that the table is not deleted or unmapped. |
311 | * | |
312 | ******************************************************************************/ | |
f60d8181 BM |
313 | acpi_status acpi_load_table(struct acpi_table_header *table) |
314 | { | |
315 | acpi_status status; | |
f60d8181 BM |
316 | u32 table_index; |
317 | ||
318 | ACPI_FUNCTION_TRACE(acpi_load_table); | |
319 | ||
320 | /* Parameter validation */ | |
321 | ||
322 | if (!table) { | |
323 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
324 | } | |
325 | ||
f60d8181 BM |
326 | /* Install the table and load it into the namespace */ |
327 | ||
05fb04b5 | 328 | ACPI_INFO(("Host-directed Dynamic ACPI Table Load:")); |
86dfc6f3 | 329 | status = |
ac0f06eb LZ |
330 | acpi_tb_install_and_load_table(table, ACPI_PTR_TO_PHYSADDR(table), |
331 | ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, | |
332 | FALSE, &table_index); | |
f60d8181 BM |
333 | return_ACPI_STATUS(status); |
334 | } | |
335 | ||
336 | ACPI_EXPORT_SYMBOL(acpi_load_table) | |
337 | ||
338 | /******************************************************************************* | |
339 | * | |
340 | * FUNCTION: acpi_unload_parent_table | |
341 | * | |
342 | * PARAMETERS: object - Handle to any namespace object owned by | |
343 | * the table to be unloaded | |
344 | * | |
345 | * RETURN: Status | |
346 | * | |
347 | * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads | |
348 | * the table and deletes all namespace objects associated with | |
349 | * that table. Unloading of the DSDT is not allowed. | |
350 | * Note: Mainly intended to support hotplug removal of SSDTs. | |
351 | * | |
352 | ******************************************************************************/ | |
353 | acpi_status acpi_unload_parent_table(acpi_handle object) | |
354 | { | |
355 | struct acpi_namespace_node *node = | |
356 | ACPI_CAST_PTR(struct acpi_namespace_node, object); | |
357 | acpi_status status = AE_NOT_EXIST; | |
358 | acpi_owner_id owner_id; | |
359 | u32 i; | |
360 | ||
361 | ACPI_FUNCTION_TRACE(acpi_unload_parent_table); | |
362 | ||
363 | /* Parameter validation */ | |
364 | ||
365 | if (!object) { | |
366 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
367 | } | |
368 | ||
369 | /* | |
370 | * The node owner_id is currently the same as the parent table ID. | |
371 | * However, this could change in the future. | |
372 | */ | |
373 | owner_id = node->owner_id; | |
374 | if (!owner_id) { | |
375 | ||
376 | /* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */ | |
377 | ||
378 | return_ACPI_STATUS(AE_TYPE); | |
379 | } | |
380 | ||
381 | /* Must acquire the interpreter lock during this operation */ | |
382 | ||
383 | status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); | |
384 | if (ACPI_FAILURE(status)) { | |
385 | return_ACPI_STATUS(status); | |
386 | } | |
387 | ||
388 | /* Find the table in the global table list */ | |
389 | ||
390 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { | |
391 | if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) { | |
392 | continue; | |
393 | } | |
394 | ||
395 | /* | |
396 | * Allow unload of SSDT and OEMx tables only. Do not allow unload | |
397 | * of the DSDT. No other types of tables should get here, since | |
398 | * only these types can contain AML and thus are the only types | |
399 | * that can create namespace objects. | |
400 | */ | |
401 | if (ACPI_COMPARE_NAME | |
402 | (acpi_gbl_root_table_list.tables[i].signature.ascii, | |
403 | ACPI_SIG_DSDT)) { | |
404 | status = AE_TYPE; | |
405 | break; | |
406 | } | |
407 | ||
408 | /* Ensure the table is actually loaded */ | |
409 | ||
410 | if (!acpi_tb_is_table_loaded(i)) { | |
411 | status = AE_NOT_EXIST; | |
412 | break; | |
413 | } | |
414 | ||
415 | /* Invoke table handler if present */ | |
416 | ||
417 | if (acpi_gbl_table_handler) { | |
418 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
419 | acpi_gbl_root_table_list. | |
420 | tables[i].pointer, | |
421 | acpi_gbl_table_handler_context); | |
422 | } | |
423 | ||
424 | /* | |
425 | * Delete all namespace objects owned by this table. Note that | |
426 | * these objects can appear anywhere in the namespace by virtue | |
427 | * of the AML "Scope" operator. Thus, we need to track ownership | |
428 | * by an ID, not simply a position within the hierarchy. | |
429 | */ | |
430 | status = acpi_tb_delete_namespace_by_owner(i); | |
431 | if (ACPI_FAILURE(status)) { | |
432 | break; | |
433 | } | |
434 | ||
435 | status = acpi_tb_release_owner_id(i); | |
436 | acpi_tb_set_table_loaded_flag(i, FALSE); | |
437 | break; | |
438 | } | |
439 | ||
440 | (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); | |
441 | return_ACPI_STATUS(status); | |
442 | } | |
443 | ||
444 | ACPI_EXPORT_SYMBOL(acpi_unload_parent_table) |