blob: 06d216c8d43ab18edc0fb1f66def077014b2aa3f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
4 *
5 *****************************************************************************/
6
7/*
Bob Moore25f044e2013-01-25 05:38:56 +00008 * Copyright (C) 2000 - 2013, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acinterp.h"
47#include "acnamesp.h"
48#include "actables.h"
49#include "acdispat.h"
Bob Moore3c59f9602009-05-21 10:51:53 +080050#include "acevents.h"
Bob Moore528a4122012-12-31 00:05:09 +000051#include "amlcode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040054ACPI_MODULE_NAME("exconfig")
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Robert Moore44f6c012005-04-18 22:49:35 -040056/* Local prototypes */
Robert Moore44f6c012005-04-18 22:49:35 -040057static acpi_status
Bob Moore67a119f2008-06-10 13:42:13 +080058acpi_ex_add_table(u32 table_index,
Len Brown4be44fc2005-08-05 00:44:28 -040059 struct acpi_namespace_node *parent_node,
60 union acpi_operand_object **ddb_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Bob Moore3c59f9602009-05-21 10:51:53 +080062static acpi_status
63acpi_ex_region_read(union acpi_operand_object *obj_desc,
64 u32 length, u8 *buffer);
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066/*******************************************************************************
67 *
68 * FUNCTION: acpi_ex_add_table
69 *
Bob Mooreba494be2012-07-12 09:40:10 +080070 * PARAMETERS: table - Pointer to raw table
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 * parent_node - Where to load the table (scope)
72 * ddb_handle - Where to return the table handle.
73 *
74 * RETURN: Status
75 *
76 * DESCRIPTION: Common function to Install and Load an ACPI table with a
77 * returned table handle.
78 *
79 ******************************************************************************/
80
Robert Moore44f6c012005-04-18 22:49:35 -040081static acpi_status
Bob Moore67a119f2008-06-10 13:42:13 +080082acpi_ex_add_table(u32 table_index,
Len Brown4be44fc2005-08-05 00:44:28 -040083 struct acpi_namespace_node *parent_node,
84 union acpi_operand_object **ddb_handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Len Brown4be44fc2005-08-05 00:44:28 -040086 union acpi_operand_object *obj_desc;
Bob Moore186c3072010-04-27 11:32:28 +080087 acpi_status status;
88 acpi_owner_id owner_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Bob Mooreb229cf92006-04-21 17:15:00 -040090 ACPI_FUNCTION_TRACE(ex_add_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 /* Create an object to be the table handle */
93
Len Brown4be44fc2005-08-05 00:44:28 -040094 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 if (!obj_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -040096 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 }
98
Robert Moore0c9938c2005-07-29 15:15:00 -070099 /* Init the table handle */
100
Lin Minge0be6f52009-05-21 10:32:02 +0800101 obj_desc->common.flags |= AOPOBJ_DATA_VALID;
Bob Moore1044f1f2008-09-27 11:08:41 +0800102 obj_desc->reference.class = ACPI_REFCLASS_TABLE;
Robert Moore0c9938c2005-07-29 15:15:00 -0700103 *ddb_handle = obj_desc;
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 /* Install the new table into the local data structures */
106
Bob Moore57e664c2008-09-27 10:40:39 +0800107 obj_desc->reference.value = table_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109 /* Add the table to the namespace */
110
Bob Mooref3d2e782007-02-02 19:48:18 +0300111 status = acpi_ns_load_table(table_index, parent_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400112 if (ACPI_FAILURE(status)) {
Bob Mooref3d2e782007-02-02 19:48:18 +0300113 acpi_ut_remove_reference(obj_desc);
114 *ddb_handle = NULL;
Lin Ming7f0c8262009-08-13 14:03:15 +0800115 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 }
117
Lin Ming7f0c8262009-08-13 14:03:15 +0800118 /* Execute any module-level code that was found in the table */
119
120 acpi_ex_exit_interpreter();
121 acpi_ns_exec_module_code_list();
122 acpi_ex_enter_interpreter();
123
Lv Zheng75c80442012-12-19 05:36:49 +0000124 /*
125 * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
126 * responsible for discovering any new wake GPEs by running _PRW methods
127 * that may have been loaded by this table.
128 */
Bob Moore186c3072010-04-27 11:32:28 +0800129 status = acpi_tb_get_owner_id(table_index, &owner_id);
130 if (ACPI_SUCCESS(status)) {
131 acpi_ev_update_gpes(owner_id);
132 }
133
134 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135}
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137/*******************************************************************************
138 *
139 * FUNCTION: acpi_ex_load_table_op
140 *
141 * PARAMETERS: walk_state - Current state with operands
142 * return_desc - Where to store the return object
143 *
144 * RETURN: Status
145 *
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300146 * DESCRIPTION: Load an ACPI table from the RSDT/XSDT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 *
148 ******************************************************************************/
149
150acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400151acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
152 union acpi_operand_object **return_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
Len Brown4be44fc2005-08-05 00:44:28 -0400154 acpi_status status;
155 union acpi_operand_object **operand = &walk_state->operands[0];
Len Brown4be44fc2005-08-05 00:44:28 -0400156 struct acpi_namespace_node *parent_node;
157 struct acpi_namespace_node *start_node;
158 struct acpi_namespace_node *parameter_node = NULL;
159 union acpi_operand_object *ddb_handle;
Bob Mooref3d2e782007-02-02 19:48:18 +0300160 struct acpi_table_header *table;
Bob Moore67a119f2008-06-10 13:42:13 +0800161 u32 table_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
Bob Mooreb229cf92006-04-21 17:15:00 -0400163 ACPI_FUNCTION_TRACE(ex_load_table_op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Lv Zheng75c80442012-12-19 05:36:49 +0000165 /* Validate lengths for the Signature, oem_id, and oem_table_id strings */
Lin Ming49718b12008-04-10 19:06:40 +0400166
167 if ((operand[0]->string.length > ACPI_NAME_SIZE) ||
168 (operand[1]->string.length > ACPI_OEM_ID_SIZE) ||
169 (operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) {
Bob Moore528a4122012-12-31 00:05:09 +0000170 return_ACPI_STATUS(AE_AML_STRING_LIMIT);
Lin Ming49718b12008-04-10 19:06:40 +0400171 }
172
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300173 /* Find the ACPI table in the RSDT/XSDT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Len Brown4be44fc2005-08-05 00:44:28 -0400175 status = acpi_tb_find_table(operand[0]->string.pointer,
176 operand[1]->string.pointer,
Bob Mooref3d2e782007-02-02 19:48:18 +0300177 operand[2]->string.pointer, &table_index);
Len Brown4be44fc2005-08-05 00:44:28 -0400178 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 if (status != AE_NOT_FOUND) {
Len Brown4be44fc2005-08-05 00:44:28 -0400180 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 }
182
183 /* Table not found, return an Integer=0 and AE_OK */
184
Bob Mooredc95a272009-11-12 09:52:45 +0800185 ddb_handle = acpi_ut_create_integer_object((u64) 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 if (!ddb_handle) {
Len Brown4be44fc2005-08-05 00:44:28 -0400187 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 }
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 *return_desc = ddb_handle;
Len Brown4be44fc2005-08-05 00:44:28 -0400191 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 }
193
194 /* Default nodes */
195
196 start_node = walk_state->scope_info->scope.node;
197 parent_node = acpi_gbl_root_node;
198
199 /* root_path (optional parameter) */
200
201 if (operand[3]->string.length > 0) {
202 /*
203 * Find the node referenced by the root_path_string. This is the
204 * location within the namespace where the table will be loaded.
205 */
Len Brown4be44fc2005-08-05 00:44:28 -0400206 status =
Bob Moore41195322006-05-26 16:36:00 -0400207 acpi_ns_get_node(start_node, operand[3]->string.pointer,
208 ACPI_NS_SEARCH_PARENT, &parent_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400209 if (ACPI_FAILURE(status)) {
210 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212 }
213
214 /* parameter_path (optional parameter) */
215
216 if (operand[4]->string.length > 0) {
Bob Moore528a4122012-12-31 00:05:09 +0000217 if ((operand[4]->string.pointer[0] != AML_ROOT_PREFIX) &&
218 (operand[4]->string.pointer[0] != AML_PARENT_PREFIX)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /*
220 * Path is not absolute, so it will be relative to the node
221 * referenced by the root_path_string (or the NS root if omitted)
222 */
223 start_node = parent_node;
224 }
225
Robert Moore44f6c012005-04-18 22:49:35 -0400226 /* Find the node referenced by the parameter_path_string */
227
Len Brown4be44fc2005-08-05 00:44:28 -0400228 status =
Bob Moore41195322006-05-26 16:36:00 -0400229 acpi_ns_get_node(start_node, operand[4]->string.pointer,
230 ACPI_NS_SEARCH_PARENT, &parameter_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400231 if (ACPI_FAILURE(status)) {
232 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
234 }
235
236 /* Load the table into the namespace */
237
Bob Mooref3d2e782007-02-02 19:48:18 +0300238 status = acpi_ex_add_table(table_index, parent_node, &ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400239 if (ACPI_FAILURE(status)) {
240 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 }
242
243 /* Parameter Data (optional) */
244
245 if (parameter_node) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 /* Store the parameter data into the optional parameter object */
248
Len Brown4be44fc2005-08-05 00:44:28 -0400249 status = acpi_ex_store(operand[5],
250 ACPI_CAST_PTR(union acpi_operand_object,
251 parameter_node),
252 walk_state);
253 if (ACPI_FAILURE(status)) {
254 (void)acpi_ex_unload_table(ddb_handle);
Lin Ming06366c12009-05-21 10:29:28 +0800255
256 acpi_ut_remove_reference(ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400257 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 }
259 }
260
Bob Mooref3d2e782007-02-02 19:48:18 +0300261 status = acpi_get_table_by_index(table_index, &table);
262 if (ACPI_SUCCESS(status)) {
Bob Moore186c3072010-04-27 11:32:28 +0800263 ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
264 acpi_tb_print_table_header(0, table);
Bob Mooref3d2e782007-02-02 19:48:18 +0300265 }
Bob Moore967440e32006-06-23 17:04:00 -0400266
Lin Ming3e08e2d2008-04-10 19:06:38 +0400267 /* Invoke table handler if present */
268
269 if (acpi_gbl_table_handler) {
270 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
271 acpi_gbl_table_handler_context);
272 }
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 *return_desc = ddb_handle;
Len Brown4be44fc2005-08-05 00:44:28 -0400275 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276}
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278/*******************************************************************************
279 *
Bob Moore3c59f9602009-05-21 10:51:53 +0800280 * FUNCTION: acpi_ex_region_read
281 *
282 * PARAMETERS: obj_desc - Region descriptor
Bob Mooreba494be2012-07-12 09:40:10 +0800283 * length - Number of bytes to read
284 * buffer - Pointer to where to put the data
Bob Moore3c59f9602009-05-21 10:51:53 +0800285 *
286 * RETURN: Status
287 *
288 * DESCRIPTION: Read data from an operation region. The read starts from the
289 * beginning of the region.
290 *
291 ******************************************************************************/
292
293static acpi_status
294acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer)
295{
296 acpi_status status;
Bob Moore5df7e6c2010-01-21 10:06:32 +0800297 u64 value;
Bob Mooref5407af2009-05-21 10:56:52 +0800298 u32 region_offset = 0;
Bob Moore3c59f9602009-05-21 10:51:53 +0800299 u32 i;
300
Bob Moore3c59f9602009-05-21 10:51:53 +0800301 /* Bytewise reads */
302
303 for (i = 0; i < length; i++) {
Bob Moore9ce81782011-11-16 13:39:07 +0800304 status =
305 acpi_ev_address_space_dispatch(obj_desc, NULL, ACPI_READ,
306 region_offset, 8, &value);
Bob Moore3c59f9602009-05-21 10:51:53 +0800307 if (ACPI_FAILURE(status)) {
Lv Zheng9c0d7932012-12-19 05:37:21 +0000308 return (status);
Bob Moore3c59f9602009-05-21 10:51:53 +0800309 }
310
311 *buffer = (u8)value;
312 buffer++;
Bob Mooref5407af2009-05-21 10:56:52 +0800313 region_offset++;
Bob Moore3c59f9602009-05-21 10:51:53 +0800314 }
315
Lv Zheng9c0d7932012-12-19 05:37:21 +0000316 return (AE_OK);
Bob Moore3c59f9602009-05-21 10:51:53 +0800317}
318
319/*******************************************************************************
320 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 * FUNCTION: acpi_ex_load_op
322 *
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300323 * PARAMETERS: obj_desc - Region or Buffer/Field where the table will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 * obtained
Bob Mooreba494be2012-07-12 09:40:10 +0800325 * target - Where a handle to the table will be stored
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 * walk_state - Current state
327 *
328 * RETURN: Status
329 *
330 * DESCRIPTION: Load an ACPI table from a field or operation region
331 *
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300332 * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer
333 * objects before this code is reached.
334 *
335 * If source is an operation region, it must refer to system_memory, as
336 * per the ACPI specification.
337 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 ******************************************************************************/
339
340acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400341acpi_ex_load_op(union acpi_operand_object *obj_desc,
342 union acpi_operand_object *target,
343 struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Len Brown4be44fc2005-08-05 00:44:28 -0400345 union acpi_operand_object *ddb_handle;
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800346 struct acpi_table_header *table;
Alexey Starikovskiy428f2112007-02-02 19:48:22 +0300347 struct acpi_table_desc table_desc;
Bob Moore67a119f2008-06-10 13:42:13 +0800348 u32 table_index;
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300349 acpi_status status;
Bob Moore98af37f2008-04-10 19:06:39 +0400350 u32 length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Bob Mooreb229cf92006-04-21 17:15:00 -0400352 ACPI_FUNCTION_TRACE(ex_load_op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Alexey Starikovskiy428f2112007-02-02 19:48:22 +0300354 ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300355
356 /* Source Object can be either an op_region or a Buffer/Field */
357
Bob Moore3371c192009-02-18 14:44:03 +0800358 switch (obj_desc->common.type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 case ACPI_TYPE_REGION:
360
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800361 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
362 "Load table from Region %p\n", obj_desc));
Bob Moore5eb69182008-04-10 19:06:39 +0400363
Alexey Starikovskiya6823e12007-02-02 19:48:22 +0300364 /* Region must be system_memory (from ACPI spec) */
365
366 if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
367 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
368 }
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 /*
371 * If the Region Address and Length have not been previously evaluated,
372 * evaluate them now and save the results.
373 */
374 if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400375 status = acpi_ds_get_region_arguments(obj_desc);
376 if (ACPI_FAILURE(status)) {
377 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 }
379 }
380
Bob Moore3c59f9602009-05-21 10:51:53 +0800381 /* Get the table header first so we can get the table length */
382
383 table = ACPI_ALLOCATE(sizeof(struct acpi_table_header));
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800384 if (!table) {
385 return_ACPI_STATUS(AE_NO_MEMORY);
386 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Bob Moore3c59f9602009-05-21 10:51:53 +0800388 status =
389 acpi_ex_region_read(obj_desc,
390 sizeof(struct acpi_table_header),
391 ACPI_CAST_PTR(u8, table));
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800392 length = table->length;
Bob Moore3c59f9602009-05-21 10:51:53 +0800393 ACPI_FREE(table);
394
395 if (ACPI_FAILURE(status)) {
396 return_ACPI_STATUS(status);
397 }
Bob Moore98af37f2008-04-10 19:06:39 +0400398
399 /* Must have at least an ACPI table header */
400
401 if (length < sizeof(struct acpi_table_header)) {
402 return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
403 }
404
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800405 /*
Bob Moore3c59f9602009-05-21 10:51:53 +0800406 * The original implementation simply mapped the table, with no copy.
407 * However, the memory region is not guaranteed to remain stable and
408 * we must copy the table to a local buffer. For example, the memory
409 * region is corrupted after suspend on some machines. Dynamically
410 * loaded tables are usually small, so this overhead is minimal.
411 *
412 * The latest implementation (5/2009) does not use a mapping at all.
413 * We use the low-level operation region interface to read the table
414 * instead of the obvious optimization of using a direct mapping.
415 * This maintains a consistent use of operation regions across the
416 * entire subsystem. This is important if additional processing must
417 * be performed in the (possibly user-installed) operation region
418 * handler. For example, acpi_exec and ASLTS depend on this.
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800419 */
Bob Moore98af37f2008-04-10 19:06:39 +0400420
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800421 /* Allocate a buffer for the table */
422
423 table_desc.pointer = ACPI_ALLOCATE(length);
424 if (!table_desc.pointer) {
425 return_ACPI_STATUS(AE_NO_MEMORY);
426 }
427
Bob Moore3c59f9602009-05-21 10:51:53 +0800428 /* Read the entire table */
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800429
Bob Moore3c59f9602009-05-21 10:51:53 +0800430 status = acpi_ex_region_read(obj_desc, length,
431 ACPI_CAST_PTR(u8,
432 table_desc.pointer));
433 if (ACPI_FAILURE(status)) {
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800434 ACPI_FREE(table_desc.pointer);
Bob Moore3c59f9602009-05-21 10:51:53 +0800435 return_ACPI_STATUS(status);
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800436 }
437
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800438 table_desc.address = obj_desc->region.address;
439 break;
440
441 case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */
442
443 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
444 "Load table from Buffer or Field %p\n",
445 obj_desc));
446
447 /* Must have at least an ACPI table header */
448
449 if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) {
450 return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
451 }
452
453 /* Get the actual table length from the table header */
454
455 table =
456 ACPI_CAST_PTR(struct acpi_table_header,
457 obj_desc->buffer.pointer);
458 length = table->length;
459
460 /* Table cannot extend beyond the buffer */
461
462 if (length > obj_desc->buffer.length) {
463 return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
464 }
465 if (length < sizeof(struct acpi_table_header)) {
466 return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
Bob Moore98af37f2008-04-10 19:06:39 +0400467 }
468
Bob Moore5eb69182008-04-10 19:06:39 +0400469 /*
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800470 * Copy the table from the buffer because the buffer could be modified
471 * or even deleted in the future
Bob Moore5eb69182008-04-10 19:06:39 +0400472 */
Bob Moore98af37f2008-04-10 19:06:39 +0400473 table_desc.pointer = ACPI_ALLOCATE(length);
Bob Moore5eb69182008-04-10 19:06:39 +0400474 if (!table_desc.pointer) {
475 return_ACPI_STATUS(AE_NO_MEMORY);
476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800478 ACPI_MEMCPY(table_desc.pointer, table, length);
479 table_desc.address = ACPI_TO_INTEGER(table_desc.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 break;
481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 default:
Chao Guan1d1ea1b2013-06-08 00:58:14 +0000483
Len Brown4be44fc2005-08-05 00:44:28 -0400484 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 }
486
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800487 /* Validate table checksum (will not get validated in tb_add_table) */
488
489 status = acpi_tb_verify_checksum(table_desc.pointer, length);
490 if (ACPI_FAILURE(status)) {
491 ACPI_FREE(table_desc.pointer);
492 return_ACPI_STATUS(status);
493 }
494
495 /* Complete the table descriptor */
496
497 table_desc.length = length;
498 table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
499
500 /* Install the new table into the local data structures */
501
Alexey Starikovskiy428f2112007-02-02 19:48:22 +0300502 status = acpi_tb_add_table(&table_desc, &table_index);
Bob Mooref3d2e782007-02-02 19:48:18 +0300503 if (ACPI_FAILURE(status)) {
Bob Moore2147d3f2010-01-21 09:08:31 +0800504
505 /* Delete allocated table buffer */
506
507 acpi_tb_delete_table(&table_desc);
508 return_ACPI_STATUS(status);
Bob Mooref3d2e782007-02-02 19:48:18 +0300509 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Bob Moore0bda3f22008-06-10 14:14:17 +0800511 /*
512 * Add the table to the namespace.
513 *
Dennis Noordsijf0e0da82008-08-15 09:37:58 +0800514 * Note: Load the table objects relative to the root of the namespace.
Bob Moore0bda3f22008-06-10 14:14:17 +0800515 * This appears to go against the ACPI specification, but we do it for
516 * compatibility with other ACPI implementations.
517 */
Bob Mooref3d2e782007-02-02 19:48:18 +0300518 status =
Bob Moore0bda3f22008-06-10 14:14:17 +0800519 acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400520 if (ACPI_FAILURE(status)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400521
Robert Moore88ac00f2005-05-26 00:00:00 -0400522 /* On error, table_ptr was deallocated above */
523
Len Brown4be44fc2005-08-05 00:44:28 -0400524 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 }
526
527 /* Store the ddb_handle into the Target operand */
528
Len Brown4be44fc2005-08-05 00:44:28 -0400529 status = acpi_ex_store(ddb_handle, target, walk_state);
530 if (ACPI_FAILURE(status)) {
531 (void)acpi_ex_unload_table(ddb_handle);
Robert Moore88ac00f2005-05-26 00:00:00 -0400532
533 /* table_ptr was deallocated above */
534
Bob Moorea13b8462008-04-10 19:06:39 +0400535 acpi_ut_remove_reference(ddb_handle);
Len Brown4be44fc2005-08-05 00:44:28 -0400536 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 }
538
Bob Moore186c3072010-04-27 11:32:28 +0800539 ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
540 acpi_tb_print_table_header(0, table_desc.pointer);
541
Lin Ming06366c12009-05-21 10:29:28 +0800542 /* Remove the reference by added by acpi_ex_store above */
543
544 acpi_ut_remove_reference(ddb_handle);
545
Lin Ming3e08e2d2008-04-10 19:06:38 +0400546 /* Invoke table handler if present */
547
548 if (acpi_gbl_table_handler) {
549 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD,
550 table_desc.pointer,
551 acpi_gbl_table_handler_context);
552 }
553
Len Brown4be44fc2005-08-05 00:44:28 -0400554 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555}
556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557/*******************************************************************************
558 *
559 * FUNCTION: acpi_ex_unload_table
560 *
561 * PARAMETERS: ddb_handle - Handle to a previously loaded table
562 *
563 * RETURN: Status
564 *
565 * DESCRIPTION: Unload an ACPI table
566 *
567 ******************************************************************************/
568
Len Brown4be44fc2005-08-05 00:44:28 -0400569acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570{
Len Brown4be44fc2005-08-05 00:44:28 -0400571 acpi_status status = AE_OK;
572 union acpi_operand_object *table_desc = ddb_handle;
Bob Moore67a119f2008-06-10 13:42:13 +0800573 u32 table_index;
Lin Ming3e08e2d2008-04-10 19:06:38 +0400574 struct acpi_table_header *table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
Bob Mooreb229cf92006-04-21 17:15:00 -0400576 ACPI_FUNCTION_TRACE(ex_unload_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
578 /*
579 * Validate the handle
Lin Minge0be6f52009-05-21 10:32:02 +0800580 * Although the handle is partially validated in acpi_ex_reconfiguration()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 * when it calls acpi_ex_resolve_operands(), the handle is more completely
582 * validated here.
Lin Minge0be6f52009-05-21 10:32:02 +0800583 *
584 * Handle must be a valid operand object of type reference. Also, the
585 * ddb_handle must still be marked valid (table has not been previously
586 * unloaded)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 */
588 if ((!ddb_handle) ||
Len Brown4be44fc2005-08-05 00:44:28 -0400589 (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
Lin Minge0be6f52009-05-21 10:32:02 +0800590 (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) ||
591 (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) {
Bob Mooref6f57f62013-05-30 09:59:00 +0800592 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 }
594
Bob Moore57e664c2008-09-27 10:40:39 +0800595 /* Get the table index from the ddb_handle */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Bob Moore57e664c2008-09-27 10:40:39 +0800597 table_index = table_desc->reference.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
Lin Minge0be6f52009-05-21 10:32:02 +0800599 /* Ensure the table is still loaded */
600
601 if (!acpi_tb_is_table_loaded(table_index)) {
602 return_ACPI_STATUS(AE_NOT_EXIST);
603 }
604
Lin Ming3e08e2d2008-04-10 19:06:38 +0400605 /* Invoke table handler if present */
606
607 if (acpi_gbl_table_handler) {
608 status = acpi_get_table_by_index(table_index, &table);
609 if (ACPI_SUCCESS(status)) {
610 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
611 table,
612 acpi_gbl_table_handler_context);
613 }
614 }
615
Bob Moore8a335a232009-03-09 16:31:04 +0800616 /* Delete the portion of the namespace owned by this table */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Bob Moore8a335a232009-03-09 16:31:04 +0800618 status = acpi_tb_delete_namespace_by_owner(table_index);
619 if (ACPI_FAILURE(status)) {
620 return_ACPI_STATUS(status);
621 }
622
623 (void)acpi_tb_release_owner_id(table_index);
Bob Mooref3d2e782007-02-02 19:48:18 +0300624 acpi_tb_set_table_loaded_flag(table_index, FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Lin Minge0be6f52009-05-21 10:32:02 +0800626 /*
627 * Invalidate the handle. We do this because the handle may be stored
628 * in a named object and may not be actually deleted until much later.
629 */
630 ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID;
Lin Ming3e08e2d2008-04-10 19:06:38 +0400631 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632}