blob: ca2f1366b498dc71af83fafde84acbb1da580234 [file] [log] [blame]
Bob Moored59b8ec2012-07-16 10:15:36 +08001/******************************************************************************
2 *
3 * Module Name: tbxfload - Table load/unload external interfaces
4 *
5 *****************************************************************************/
6
7/*
David E. Box82a80942015-02-05 15:20:45 +08008 * Copyright (C) 2000 - 2015, Intel Corp.
Bob Moored59b8ec2012-07-16 10:15:36 +08009 * 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
Lv Zheng839e9282013-10-29 09:29:51 +080044#define EXPORT_ACPI_INTERFACES
45
Bob Moored59b8ec2012-07-16 10:15:36 +080046#include <acpi/acpi.h>
47#include "accommon.h"
48#include "acnamesp.h"
49#include "actables.h"
50
51#define _COMPONENT ACPI_TABLES
52ACPI_MODULE_NAME("tbxfload")
53
Bob Moored59b8ec2012-07-16 10:15:36 +080054/*******************************************************************************
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 ******************************************************************************/
Lv Zheng45c9f782013-10-31 09:31:24 +080065acpi_status __init acpi_load_tables(void)
Bob Moored59b8ec2012-07-16 10:15:36 +080066{
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();
Bob Moore93cdafa2015-08-25 10:29:33 +080074
75 /* Don't let single failures abort the load */
76
77 if (status == AE_CTRL_TERMINATE) {
78 status = AE_OK;
79 }
80
Bob Moored59b8ec2012-07-16 10:15:36 +080081 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
Lv Zhengd21f6002013-10-29 09:30:10 +080089ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)
Bob Moored59b8ec2012-07-16 10:15:36 +080090
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 ******************************************************************************/
Bob Moore93cdafa2015-08-25 10:29:33 +0800103acpi_status acpi_tb_load_namespace(void)
Bob Moored59b8ec2012-07-16 10:15:36 +0800104{
105 acpi_status status;
106 u32 i;
107 struct acpi_table_header *new_dsdt;
Bob Moore3c0503d2015-08-25 10:29:39 +0800108 struct acpi_table_desc *table;
Bob Moore4712f712015-08-25 10:28:26 +0800109 u32 tables_loaded = 0;
110 u32 tables_failed = 0;
Bob Moored59b8ec2012-07-16 10:15:36 +0800111
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 */
Bob Moore3c0503d2015-08-25 10:29:39 +0800120 table = &acpi_gbl_root_table_list.tables[acpi_gbl_dsdt_index];
121
Bob Moored59b8ec2012-07-16 10:15:36 +0800122 if (!acpi_gbl_root_table_list.current_table_count ||
Bob Moore3c0503d2015-08-25 10:29:39 +0800123 !ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_DSDT) ||
124 ACPI_FAILURE(acpi_tb_validate_table(table))) {
Bob Moored59b8ec2012-07-16 10:15:36 +0800125 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:
Lv Zheng7f9fc992014-04-04 12:38:42 +0800133 * .Pointer field is not validated until after call to acpi_tb_validate_table.
Bob Moored59b8ec2012-07-16 10:15:36 +0800134 */
Bob Moore3c0503d2015-08-25 10:29:39 +0800135 acpi_gbl_DSDT = table->pointer;
Bob Moored59b8ec2012-07-16 10:15:36 +0800136
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) {
Lv Zheng8ec3f452015-08-25 10:29:01 +0800144 new_dsdt = acpi_tb_copy_dsdt(acpi_gbl_dsdt_index);
Bob Moored59b8ec2012-07-16 10:15:36 +0800145 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 */
Bob Moore4fa46162015-07-01 14:45:11 +0800154 memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
155 sizeof(struct acpi_table_header));
Bob Moored59b8ec2012-07-16 10:15:36 +0800156
157 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
158
159 /* Load and parse tables */
160
Lv Zheng8ec3f452015-08-25 10:29:01 +0800161 status = acpi_ns_load_table(acpi_gbl_dsdt_index, acpi_gbl_root_node);
Bob Moored59b8ec2012-07-16 10:15:36 +0800162 if (ACPI_FAILURE(status)) {
Bob Moore4712f712015-08-25 10:28:26 +0800163 ACPI_EXCEPTION((AE_INFO, status, "[DSDT] table load failed"));
164 tables_failed++;
165 } else {
166 tables_loaded++;
Bob Moored59b8ec2012-07-16 10:15:36 +0800167 }
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) {
Bob Moore3c0503d2015-08-25 10:29:39 +0800173 table = &acpi_gbl_root_table_list.tables[i];
174
Lv Zhengc04e1fb2015-07-01 14:43:11 +0800175 if (!acpi_gbl_root_table_list.tables[i].address ||
Bob Moore3c0503d2015-08-25 10:29:39 +0800176 (!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))) {
Bob Moored59b8ec2012-07-16 10:15:36 +0800182 continue;
183 }
184
Bob Moored59b8ec2012-07-16 10:15:36 +0800185 /* Ignore errors while loading tables, get as many as possible */
186
187 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
Bob Moore4712f712015-08-25 10:28:26 +0800188 status = acpi_ns_load_table(i, acpi_gbl_root_node);
189 if (ACPI_FAILURE(status)) {
190 ACPI_EXCEPTION((AE_INFO, status,
Bob Moore3c0503d2015-08-25 10:29:39 +0800191 "(%4.4s:%8.8s) while loading table",
192 table->signature.ascii,
193 table->pointer->oem_table_id));
Bob Moore1fad8732015-12-29 13:54:36 +0800194
Bob Moore4712f712015-08-25 10:28:26 +0800195 tables_failed++;
Bob Moore3c0503d2015-08-25 10:29:39 +0800196
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));
Bob Moore4712f712015-08-25 10:28:26 +0800201 } else {
202 tables_loaded++;
203 }
204
Bob Moored59b8ec2012-07-16 10:15:36 +0800205 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
206 }
207
Bob Moore4712f712015-08-25 10:28:26 +0800208 if (!tables_failed) {
209 ACPI_INFO((AE_INFO,
Bob Moore2ba73792015-12-29 13:54:58 +0800210 "%u ACPI AML tables successfully acquired and loaded\n",
Bob Moore4712f712015-08-25 10:28:26 +0800211 tables_loaded));
212 } else {
213 ACPI_ERROR((AE_INFO,
Bob Moore3c0503d2015-08-25 10:29:39 +0800214 "%u table load failures, %u successful",
215 tables_failed, tables_loaded));
Bob Moore93cdafa2015-08-25 10:29:33 +0800216
217 /* Indicate at least one failure */
218
219 status = AE_CTRL_TERMINATE;
Bob Moore4712f712015-08-25 10:28:26 +0800220 }
Bob Moored59b8ec2012-07-16 10:15:36 +0800221
Lv Zheng10622bf2013-10-29 09:30:02 +0800222unlock_and_exit:
Bob Moored59b8ec2012-07-16 10:15:36 +0800223 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
224 return_ACPI_STATUS(status);
225}
226
Bob Mooref60d8182012-07-16 10:21:34 +0800227/*******************************************************************************
228 *
Lv Zhengcaf4a152014-04-04 12:39:18 +0800229 * 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
243acpi_status __init
244acpi_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) {
Bob Mooreed6f1d42014-04-04 12:39:26 +0800253 flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
Zhang Ruidc002032015-07-01 14:44:37 +0800254 } else {
255 flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
Lv Zhengcaf4a152014-04-04 12:39:18 +0800256 }
257
Bob Mooreed6f1d42014-04-04 12:39:26 +0800258 status = acpi_tb_install_standard_table(address, flags,
259 FALSE, FALSE, &table_index);
Lv Zhengcaf4a152014-04-04 12:39:18 +0800260
261 return_ACPI_STATUS(status);
262}
263
264ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)
265
266/*******************************************************************************
267 *
Bob Mooref60d8182012-07-16 10:21:34 +0800268 * 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.
Bob Moore691fda52012-10-31 02:26:23 +0000278 * Note2: Does not copy the incoming table. User is responsible
Bob Mooref60d8182012-07-16 10:21:34 +0800279 * to ensure that the table is not deleted or unmapped.
280 *
281 ******************************************************************************/
Bob Mooref60d8182012-07-16 10:21:34 +0800282acpi_status acpi_load_table(struct acpi_table_header *table)
283{
284 acpi_status status;
Bob Mooref60d8182012-07-16 10:21:34 +0800285 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
Bob Mooref60d8182012-07-16 10:21:34 +0800295 /* 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:"));
Lv Zheng86dfc6f32014-04-04 12:38:57 +0800305 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
Bob Mooreed6f1d42014-04-04 12:39:26 +0800306
307 status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
308 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
309 TRUE, FALSE, &table_index);
310
Lv Zheng86dfc6f32014-04-04 12:38:57 +0800311 (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]);
Bob Mooref60d8182012-07-16 10:21:34 +0800323 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
Lv Zheng10622bf2013-10-29 09:30:02 +0800336unlock_and_exit:
Bob Mooref60d8182012-07-16 10:21:34 +0800337 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
338 return_ACPI_STATUS(status);
339}
340
341ACPI_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 ******************************************************************************/
358acpi_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
449ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)