tbxfload.c revision 1.1.1.2.2.2 1 /******************************************************************************
2 *
3 * Module Name: tbxfload - Table load/unload external interfaces
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2015, Intel Corp.
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
44 #define EXPORT_ACPI_INTERFACES
45
46 #include "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
56 static ACPI_STATUS
57 AcpiTbLoadNamespace (
58 void);
59
60
61 /*******************************************************************************
62 *
63 * FUNCTION: AcpiLoadTables
64 *
65 * PARAMETERS: None
66 *
67 * RETURN: Status
68 *
69 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
70 *
71 ******************************************************************************/
72
73 ACPI_STATUS
74 AcpiLoadTables (
75 void)
76 {
77 ACPI_STATUS Status;
78
79
80 ACPI_FUNCTION_TRACE (AcpiLoadTables);
81
82
83 /* Load the namespace from the tables */
84
85 Status = AcpiTbLoadNamespace ();
86 if (ACPI_FAILURE (Status))
87 {
88 ACPI_EXCEPTION ((AE_INFO, Status,
89 "While loading namespace from ACPI tables"));
90 }
91
92 return_ACPI_STATUS (Status);
93 }
94
95 ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables)
96
97
98 /*******************************************************************************
99 *
100 * FUNCTION: AcpiTbLoadNamespace
101 *
102 * PARAMETERS: None
103 *
104 * RETURN: Status
105 *
106 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
107 * the RSDT/XSDT.
108 *
109 ******************************************************************************/
110
111 static ACPI_STATUS
112 AcpiTbLoadNamespace (
113 void)
114 {
115 ACPI_STATUS Status;
116 UINT32 i;
117 ACPI_TABLE_HEADER *NewDsdt;
118
119
120 ACPI_FUNCTION_TRACE (TbLoadNamespace);
121
122
123 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
124
125 /*
126 * Load the namespace. The DSDT is required, but any SSDT and
127 * PSDT tables are optional. Verify the DSDT.
128 */
129 if (!AcpiGbl_RootTableList.CurrentTableCount ||
130 !ACPI_COMPARE_NAME (
131 &(AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Signature),
132 ACPI_SIG_DSDT) ||
133 ACPI_FAILURE (AcpiTbValidateTable (
134 &AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT])))
135 {
136 Status = AE_NO_ACPI_TABLES;
137 goto UnlockAndExit;
138 }
139
140 /*
141 * Save the DSDT pointer for simple access. This is the mapped memory
142 * address. We must take care here because the address of the .Tables
143 * array can change dynamically as tables are loaded at run-time. Note:
144 * .Pointer field is not validated until after call to AcpiTbValidateTable.
145 */
146 AcpiGbl_DSDT = AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Pointer;
147
148 /*
149 * Optionally copy the entire DSDT to local memory (instead of simply
150 * mapping it.) There are some BIOSs that corrupt or replace the original
151 * DSDT, creating the need for this option. Default is FALSE, do not copy
152 * the DSDT.
153 */
154 if (AcpiGbl_CopyDsdtLocally)
155 {
156 NewDsdt = AcpiTbCopyDsdt (ACPI_TABLE_INDEX_DSDT);
157 if (NewDsdt)
158 {
159 AcpiGbl_DSDT = NewDsdt;
160 }
161 }
162
163 /*
164 * Save the original DSDT header for detection of table corruption
165 * and/or replacement of the DSDT from outside the OS.
166 */
167 memcpy (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT,
168 sizeof (ACPI_TABLE_HEADER));
169
170 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
171
172 /* Load and parse tables */
173
174 Status = AcpiNsLoadTable (ACPI_TABLE_INDEX_DSDT, AcpiGbl_RootNode);
175 if (ACPI_FAILURE (Status))
176 {
177 return_ACPI_STATUS (Status);
178 }
179
180 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
181
182 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
183 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
184 {
185 if (!AcpiGbl_RootTableList.Tables[i].Address ||
186 (!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
187 ACPI_SIG_SSDT) &&
188 !ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
189 ACPI_SIG_PSDT) &&
190 !ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
191 ACPI_SIG_OSDT)) ||
192 ACPI_FAILURE (AcpiTbValidateTable (
193 &AcpiGbl_RootTableList.Tables[i])))
194 {
195 continue;
196 }
197
198 /* Ignore errors while loading tables, get as many as possible */
199
200 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
201 (void) AcpiNsLoadTable (i, AcpiGbl_RootNode);
202 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
203 }
204
205 ACPI_INFO ((AE_INFO, "All ACPI Tables successfully acquired"));
206
207 UnlockAndExit:
208 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
209 return_ACPI_STATUS (Status);
210 }
211
212
213 /*******************************************************************************
214 *
215 * FUNCTION: AcpiInstallTable
216 *
217 * PARAMETERS: Address - Address of the ACPI table to be installed.
218 * Physical - Whether the address is a physical table
219 * address or not
220 *
221 * RETURN: Status
222 *
223 * DESCRIPTION: Dynamically install an ACPI table.
224 * Note: This function should only be invoked after
225 * AcpiInitializeTables() and before AcpiLoadTables().
226 *
227 ******************************************************************************/
228
229 ACPI_STATUS
230 AcpiInstallTable (
231 ACPI_PHYSICAL_ADDRESS Address,
232 BOOLEAN Physical)
233 {
234 ACPI_STATUS Status;
235 UINT8 Flags;
236 UINT32 TableIndex;
237
238
239 ACPI_FUNCTION_TRACE (AcpiInstallTable);
240
241
242 if (Physical)
243 {
244 Flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
245 }
246 else
247 {
248 Flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
249 }
250
251 Status = AcpiTbInstallStandardTable (Address, Flags,
252 FALSE, FALSE, &TableIndex);
253
254 return_ACPI_STATUS (Status);
255 }
256
257 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable)
258
259
260 /*******************************************************************************
261 *
262 * FUNCTION: AcpiLoadTable
263 *
264 * PARAMETERS: Table - Pointer to a buffer containing the ACPI
265 * table to be loaded.
266 *
267 * RETURN: Status
268 *
269 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
270 * be a valid ACPI table with a valid ACPI table header.
271 * Note1: Mainly intended to support hotplug addition of SSDTs.
272 * Note2: Does not copy the incoming table. User is responsible
273 * to ensure that the table is not deleted or unmapped.
274 *
275 ******************************************************************************/
276
277 ACPI_STATUS
278 AcpiLoadTable (
279 ACPI_TABLE_HEADER *Table)
280 {
281 ACPI_STATUS Status;
282 UINT32 TableIndex;
283
284
285 ACPI_FUNCTION_TRACE (AcpiLoadTable);
286
287
288 /* Parameter validation */
289
290 if (!Table)
291 {
292 return_ACPI_STATUS (AE_BAD_PARAMETER);
293 }
294
295 /* Must acquire the interpreter lock during this operation */
296
297 Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
298 if (ACPI_FAILURE (Status))
299 {
300 return_ACPI_STATUS (Status);
301 }
302
303 /* Install the table and load it into the namespace */
304
305 ACPI_INFO ((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
306 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
307
308 Status = AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table),
309 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, TRUE, FALSE,
310 &TableIndex);
311
312 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
313 if (ACPI_FAILURE (Status))
314 {
315 goto UnlockAndExit;
316 }
317
318 /*
319 * Note: Now table is "INSTALLED", it must be validated before
320 * using.
321 */
322 Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[TableIndex]);
323 if (ACPI_FAILURE (Status))
324 {
325 goto UnlockAndExit;
326 }
327
328 Status = AcpiNsLoadTable (TableIndex, AcpiGbl_RootNode);
329
330 /* Invoke table handler if present */
331
332 if (AcpiGbl_TableHandler)
333 {
334 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
335 AcpiGbl_TableHandlerContext);
336 }
337
338 UnlockAndExit:
339 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
340 return_ACPI_STATUS (Status);
341 }
342
343 ACPI_EXPORT_SYMBOL (AcpiLoadTable)
344
345
346 /*******************************************************************************
347 *
348 * FUNCTION: AcpiUnloadParentTable
349 *
350 * PARAMETERS: Object - Handle to any namespace object owned by
351 * the table to be unloaded
352 *
353 * RETURN: Status
354 *
355 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
356 * the table and deletes all namespace objects associated with
357 * that table. Unloading of the DSDT is not allowed.
358 * Note: Mainly intended to support hotplug removal of SSDTs.
359 *
360 ******************************************************************************/
361
362 ACPI_STATUS
363 AcpiUnloadParentTable (
364 ACPI_HANDLE Object)
365 {
366 ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object);
367 ACPI_STATUS Status = AE_NOT_EXIST;
368 ACPI_OWNER_ID OwnerId;
369 UINT32 i;
370
371
372 ACPI_FUNCTION_TRACE (AcpiUnloadParentTable);
373
374
375 /* Parameter validation */
376
377 if (!Object)
378 {
379 return_ACPI_STATUS (AE_BAD_PARAMETER);
380 }
381
382 /*
383 * The node OwnerId is currently the same as the parent table ID.
384 * However, this could change in the future.
385 */
386 OwnerId = Node->OwnerId;
387 if (!OwnerId)
388 {
389 /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
390
391 return_ACPI_STATUS (AE_TYPE);
392 }
393
394 /* Must acquire the interpreter lock during this operation */
395
396 Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
397 if (ACPI_FAILURE (Status))
398 {
399 return_ACPI_STATUS (Status);
400 }
401
402 /* Find the table in the global table list */
403
404 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
405 {
406 if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId)
407 {
408 continue;
409 }
410
411 /*
412 * Allow unload of SSDT and OEMx tables only. Do not allow unload
413 * of the DSDT. No other types of tables should get here, since
414 * only these types can contain AML and thus are the only types
415 * that can create namespace objects.
416 */
417 if (ACPI_COMPARE_NAME (
418 AcpiGbl_RootTableList.Tables[i].Signature.Ascii,
419 ACPI_SIG_DSDT))
420 {
421 Status = AE_TYPE;
422 break;
423 }
424
425 /* Ensure the table is actually loaded */
426
427 if (!AcpiTbIsTableLoaded (i))
428 {
429 Status = AE_NOT_EXIST;
430 break;
431 }
432
433 /* Invoke table handler if present */
434
435 if (AcpiGbl_TableHandler)
436 {
437 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD,
438 AcpiGbl_RootTableList.Tables[i].Pointer,
439 AcpiGbl_TableHandlerContext);
440 }
441
442 /*
443 * Delete all namespace objects owned by this table. Note that
444 * these objects can appear anywhere in the namespace by virtue
445 * of the AML "Scope" operator. Thus, we need to track ownership
446 * by an ID, not simply a position within the hierarchy.
447 */
448 Status = AcpiTbDeleteNamespaceByOwner (i);
449 if (ACPI_FAILURE (Status))
450 {
451 break;
452 }
453
454 Status = AcpiTbReleaseOwnerId (i);
455 AcpiTbSetTableLoadedFlag (i, FALSE);
456 break;
457 }
458
459 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
460 return_ACPI_STATUS (Status);
461 }
462
463 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)
464