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d59b8ecd BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbxfload - Table load/unload external interfaces | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
82a80941 | 8 | * Copyright (C) 2000 - 2015, 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 | ||
54 | /* Local prototypes */ | |
55 | static acpi_status acpi_tb_load_namespace(void); | |
56 | ||
d59b8ecd BM |
57 | /******************************************************************************* |
58 | * | |
59 | * FUNCTION: acpi_load_tables | |
60 | * | |
61 | * PARAMETERS: None | |
62 | * | |
63 | * RETURN: Status | |
64 | * | |
65 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
66 | * | |
67 | ******************************************************************************/ | |
68 | ||
45c9f78b | 69 | acpi_status __init acpi_load_tables(void) |
d59b8ecd BM |
70 | { |
71 | acpi_status status; | |
72 | ||
73 | ACPI_FUNCTION_TRACE(acpi_load_tables); | |
74 | ||
75 | /* Load the namespace from the tables */ | |
76 | ||
77 | status = acpi_tb_load_namespace(); | |
78 | if (ACPI_FAILURE(status)) { | |
79 | ACPI_EXCEPTION((AE_INFO, status, | |
80 | "While loading namespace from ACPI tables")); | |
81 | } | |
82 | ||
83 | return_ACPI_STATUS(status); | |
84 | } | |
85 | ||
d21f600b | 86 | ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables) |
d59b8ecd BM |
87 | |
88 | /******************************************************************************* | |
89 | * | |
90 | * FUNCTION: acpi_tb_load_namespace | |
91 | * | |
92 | * PARAMETERS: None | |
93 | * | |
94 | * RETURN: Status | |
95 | * | |
96 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in | |
97 | * the RSDT/XSDT. | |
98 | * | |
99 | ******************************************************************************/ | |
100 | static acpi_status acpi_tb_load_namespace(void) | |
101 | { | |
102 | acpi_status status; | |
103 | u32 i; | |
104 | struct acpi_table_header *new_dsdt; | |
105 | ||
106 | ACPI_FUNCTION_TRACE(tb_load_namespace); | |
107 | ||
108 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
109 | ||
110 | /* | |
111 | * Load the namespace. The DSDT is required, but any SSDT and | |
112 | * PSDT tables are optional. Verify the DSDT. | |
113 | */ | |
114 | if (!acpi_gbl_root_table_list.current_table_count || | |
115 | !ACPI_COMPARE_NAME(& | |
116 | (acpi_gbl_root_table_list. | |
117 | tables[ACPI_TABLE_INDEX_DSDT].signature), | |
118 | ACPI_SIG_DSDT) | |
119 | || | |
7f9fc99c | 120 | ACPI_FAILURE(acpi_tb_validate_table |
d59b8ecd BM |
121 | (&acpi_gbl_root_table_list. |
122 | tables[ACPI_TABLE_INDEX_DSDT]))) { | |
123 | status = AE_NO_ACPI_TABLES; | |
124 | goto unlock_and_exit; | |
125 | } | |
126 | ||
127 | /* | |
128 | * Save the DSDT pointer for simple access. This is the mapped memory | |
129 | * address. We must take care here because the address of the .Tables | |
130 | * array can change dynamically as tables are loaded at run-time. Note: | |
7f9fc99c | 131 | * .Pointer field is not validated until after call to acpi_tb_validate_table. |
d59b8ecd BM |
132 | */ |
133 | acpi_gbl_DSDT = | |
134 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer; | |
135 | ||
136 | /* | |
137 | * Optionally copy the entire DSDT to local memory (instead of simply | |
138 | * mapping it.) There are some BIOSs that corrupt or replace the original | |
139 | * DSDT, creating the need for this option. Default is FALSE, do not copy | |
140 | * the DSDT. | |
141 | */ | |
142 | if (acpi_gbl_copy_dsdt_locally) { | |
143 | new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT); | |
144 | if (new_dsdt) { | |
145 | acpi_gbl_DSDT = new_dsdt; | |
146 | } | |
147 | } | |
148 | ||
149 | /* | |
150 | * Save the original DSDT header for detection of table corruption | |
151 | * and/or replacement of the DSDT from outside the OS. | |
152 | */ | |
153 | ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT, | |
154 | sizeof(struct acpi_table_header)); | |
155 | ||
156 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
157 | ||
158 | /* Load and parse tables */ | |
159 | ||
160 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); | |
161 | if (ACPI_FAILURE(status)) { | |
162 | return_ACPI_STATUS(status); | |
163 | } | |
164 | ||
165 | /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ | |
166 | ||
167 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
168 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { | |
169 | if ((!ACPI_COMPARE_NAME | |
170 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
171 | ACPI_SIG_SSDT) | |
172 | && | |
173 | !ACPI_COMPARE_NAME(& | |
174 | (acpi_gbl_root_table_list.tables[i]. | |
175 | signature), ACPI_SIG_PSDT)) | |
176 | || | |
7f9fc99c | 177 | ACPI_FAILURE(acpi_tb_validate_table |
d59b8ecd BM |
178 | (&acpi_gbl_root_table_list.tables[i]))) { |
179 | continue; | |
180 | } | |
181 | ||
d59b8ecd BM |
182 | /* Ignore errors while loading tables, get as many as possible */ |
183 | ||
184 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
185 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); | |
186 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
187 | } | |
188 | ||
3e5621a7 | 189 | ACPI_INFO((AE_INFO, "All ACPI Tables successfully acquired")); |
d59b8ecd | 190 | |
10622bf8 | 191 | unlock_and_exit: |
d59b8ecd BM |
192 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
193 | return_ACPI_STATUS(status); | |
194 | } | |
195 | ||
caf4a15c LZ |
196 | /******************************************************************************* |
197 | * | |
198 | * FUNCTION: acpi_install_table | |
199 | * | |
200 | * PARAMETERS: address - Address of the ACPI table to be installed. | |
201 | * physical - Whether the address is a physical table | |
202 | * address or not | |
203 | * | |
204 | * RETURN: Status | |
205 | * | |
206 | * DESCRIPTION: Dynamically install an ACPI table. | |
207 | * Note: This function should only be invoked after | |
208 | * acpi_initialize_tables() and before acpi_load_tables(). | |
209 | * | |
210 | ******************************************************************************/ | |
211 | ||
212 | acpi_status __init | |
213 | acpi_install_table(acpi_physical_address address, u8 physical) | |
214 | { | |
215 | acpi_status status; | |
216 | u8 flags; | |
217 | u32 table_index; | |
218 | ||
219 | ACPI_FUNCTION_TRACE(acpi_install_table); | |
220 | ||
221 | if (physical) { | |
ed6f1d44 | 222 | flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL; |
caf4a15c | 223 | } else { |
ed6f1d44 | 224 | flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL; |
caf4a15c LZ |
225 | } |
226 | ||
ed6f1d44 BM |
227 | status = acpi_tb_install_standard_table(address, flags, |
228 | FALSE, FALSE, &table_index); | |
caf4a15c LZ |
229 | |
230 | return_ACPI_STATUS(status); | |
231 | } | |
232 | ||
233 | ACPI_EXPORT_SYMBOL_INIT(acpi_install_table) | |
234 | ||
f60d8181 BM |
235 | /******************************************************************************* |
236 | * | |
237 | * FUNCTION: acpi_load_table | |
238 | * | |
239 | * PARAMETERS: table - Pointer to a buffer containing the ACPI | |
240 | * table to be loaded. | |
241 | * | |
242 | * RETURN: Status | |
243 | * | |
244 | * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must | |
245 | * be a valid ACPI table with a valid ACPI table header. | |
246 | * Note1: Mainly intended to support hotplug addition of SSDTs. | |
691fda50 | 247 | * Note2: Does not copy the incoming table. User is responsible |
f60d8181 BM |
248 | * to ensure that the table is not deleted or unmapped. |
249 | * | |
250 | ******************************************************************************/ | |
f60d8181 BM |
251 | acpi_status acpi_load_table(struct acpi_table_header *table) |
252 | { | |
253 | acpi_status status; | |
f60d8181 BM |
254 | u32 table_index; |
255 | ||
256 | ACPI_FUNCTION_TRACE(acpi_load_table); | |
257 | ||
258 | /* Parameter validation */ | |
259 | ||
260 | if (!table) { | |
261 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
262 | } | |
263 | ||
f60d8181 BM |
264 | /* Must acquire the interpreter lock during this operation */ |
265 | ||
266 | status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); | |
267 | if (ACPI_FAILURE(status)) { | |
268 | return_ACPI_STATUS(status); | |
269 | } | |
270 | ||
271 | /* Install the table and load it into the namespace */ | |
272 | ||
273 | ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:")); | |
86dfc6f3 | 274 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
ed6f1d44 BM |
275 | |
276 | status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table), | |
277 | ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, | |
278 | TRUE, FALSE, &table_index); | |
279 | ||
86dfc6f3 LZ |
280 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
281 | if (ACPI_FAILURE(status)) { | |
282 | goto unlock_and_exit; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Note: Now table is "INSTALLED", it must be validated before | |
287 | * using. | |
288 | */ | |
289 | status = | |
290 | acpi_tb_validate_table(&acpi_gbl_root_table_list. | |
291 | tables[table_index]); | |
f60d8181 BM |
292 | if (ACPI_FAILURE(status)) { |
293 | goto unlock_and_exit; | |
294 | } | |
295 | ||
296 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); | |
297 | ||
298 | /* Invoke table handler if present */ | |
299 | ||
300 | if (acpi_gbl_table_handler) { | |
301 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table, | |
302 | acpi_gbl_table_handler_context); | |
303 | } | |
304 | ||
10622bf8 | 305 | unlock_and_exit: |
f60d8181 BM |
306 | (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); |
307 | return_ACPI_STATUS(status); | |
308 | } | |
309 | ||
310 | ACPI_EXPORT_SYMBOL(acpi_load_table) | |
311 | ||
312 | /******************************************************************************* | |
313 | * | |
314 | * FUNCTION: acpi_unload_parent_table | |
315 | * | |
316 | * PARAMETERS: object - Handle to any namespace object owned by | |
317 | * the table to be unloaded | |
318 | * | |
319 | * RETURN: Status | |
320 | * | |
321 | * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads | |
322 | * the table and deletes all namespace objects associated with | |
323 | * that table. Unloading of the DSDT is not allowed. | |
324 | * Note: Mainly intended to support hotplug removal of SSDTs. | |
325 | * | |
326 | ******************************************************************************/ | |
327 | acpi_status acpi_unload_parent_table(acpi_handle object) | |
328 | { | |
329 | struct acpi_namespace_node *node = | |
330 | ACPI_CAST_PTR(struct acpi_namespace_node, object); | |
331 | acpi_status status = AE_NOT_EXIST; | |
332 | acpi_owner_id owner_id; | |
333 | u32 i; | |
334 | ||
335 | ACPI_FUNCTION_TRACE(acpi_unload_parent_table); | |
336 | ||
337 | /* Parameter validation */ | |
338 | ||
339 | if (!object) { | |
340 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
341 | } | |
342 | ||
343 | /* | |
344 | * The node owner_id is currently the same as the parent table ID. | |
345 | * However, this could change in the future. | |
346 | */ | |
347 | owner_id = node->owner_id; | |
348 | if (!owner_id) { | |
349 | ||
350 | /* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */ | |
351 | ||
352 | return_ACPI_STATUS(AE_TYPE); | |
353 | } | |
354 | ||
355 | /* Must acquire the interpreter lock during this operation */ | |
356 | ||
357 | status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); | |
358 | if (ACPI_FAILURE(status)) { | |
359 | return_ACPI_STATUS(status); | |
360 | } | |
361 | ||
362 | /* Find the table in the global table list */ | |
363 | ||
364 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { | |
365 | if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) { | |
366 | continue; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Allow unload of SSDT and OEMx tables only. Do not allow unload | |
371 | * of the DSDT. No other types of tables should get here, since | |
372 | * only these types can contain AML and thus are the only types | |
373 | * that can create namespace objects. | |
374 | */ | |
375 | if (ACPI_COMPARE_NAME | |
376 | (acpi_gbl_root_table_list.tables[i].signature.ascii, | |
377 | ACPI_SIG_DSDT)) { | |
378 | status = AE_TYPE; | |
379 | break; | |
380 | } | |
381 | ||
382 | /* Ensure the table is actually loaded */ | |
383 | ||
384 | if (!acpi_tb_is_table_loaded(i)) { | |
385 | status = AE_NOT_EXIST; | |
386 | break; | |
387 | } | |
388 | ||
389 | /* Invoke table handler if present */ | |
390 | ||
391 | if (acpi_gbl_table_handler) { | |
392 | (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD, | |
393 | acpi_gbl_root_table_list. | |
394 | tables[i].pointer, | |
395 | acpi_gbl_table_handler_context); | |
396 | } | |
397 | ||
398 | /* | |
399 | * Delete all namespace objects owned by this table. Note that | |
400 | * these objects can appear anywhere in the namespace by virtue | |
401 | * of the AML "Scope" operator. Thus, we need to track ownership | |
402 | * by an ID, not simply a position within the hierarchy. | |
403 | */ | |
404 | status = acpi_tb_delete_namespace_by_owner(i); | |
405 | if (ACPI_FAILURE(status)) { | |
406 | break; | |
407 | } | |
408 | ||
409 | status = acpi_tb_release_owner_id(i); | |
410 | acpi_tb_set_table_loaded_flag(i, FALSE); | |
411 | break; | |
412 | } | |
413 | ||
414 | (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); | |
415 | return_ACPI_STATUS(status); | |
416 | } | |
417 | ||
418 | ACPI_EXPORT_SYMBOL(acpi_unload_parent_table) |