mm/zsmalloc: allocate exactly size of struct zs_pool
[linux/fpc-iii.git] / drivers / acpi / acpica / tbdata.c
blobf499c10ceb4a92549d651955ef8c038d77ac6d02
1 /******************************************************************************
3 * Module Name: tbdata - Table manager data structure functions
5 *****************************************************************************/
7 /*
8 * Copyright (C) 2000 - 2014, Intel Corp.
9 * All rights reserved.
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.
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.
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.
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acnamesp.h"
47 #include "actables.h"
49 #define _COMPONENT ACPI_TABLES
50 ACPI_MODULE_NAME("tbdata")
52 /*******************************************************************************
54 * FUNCTION: acpi_tb_init_table_descriptor
56 * PARAMETERS: table_desc - Table descriptor
57 * address - Physical address of the table
58 * flags - Allocation flags of the table
59 * table - Pointer to the table
61 * RETURN: None
63 * DESCRIPTION: Initialize a new table descriptor
65 ******************************************************************************/
66 void
67 acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
68 acpi_physical_address address,
69 u8 flags, struct acpi_table_header *table)
73 * Initialize the table descriptor. Set the pointer to NULL, since the
74 * table is not fully mapped at this time.
76 ACPI_MEMSET(table_desc, 0, sizeof(struct acpi_table_desc));
77 table_desc->address = address;
78 table_desc->length = table->length;
79 table_desc->flags = flags;
80 ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
83 /*******************************************************************************
85 * FUNCTION: acpi_tb_acquire_table
87 * PARAMETERS: table_desc - Table descriptor
88 * table_ptr - Where table is returned
89 * table_length - Where table length is returned
90 * table_flags - Where table allocation flags are returned
92 * RETURN: Status
94 * DESCRIPTION: Acquire an ACPI table. It can be used for tables not
95 * maintained in the acpi_gbl_root_table_list.
97 ******************************************************************************/
99 acpi_status
100 acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
101 struct acpi_table_header **table_ptr,
102 u32 *table_length, u8 *table_flags)
104 struct acpi_table_header *table = NULL;
106 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
107 case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
109 table =
110 acpi_os_map_memory(table_desc->address, table_desc->length);
111 break;
113 case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
114 case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
116 table =
117 ACPI_CAST_PTR(struct acpi_table_header,
118 table_desc->address);
119 break;
121 default:
123 break;
126 /* Table is not valid yet */
128 if (!table) {
129 return (AE_NO_MEMORY);
132 /* Fill the return values */
134 *table_ptr = table;
135 *table_length = table_desc->length;
136 *table_flags = table_desc->flags;
137 return (AE_OK);
140 /*******************************************************************************
142 * FUNCTION: acpi_tb_release_table
144 * PARAMETERS: table - Pointer for the table
145 * table_length - Length for the table
146 * table_flags - Allocation flags for the table
148 * RETURN: None
150 * DESCRIPTION: Release a table. The inverse of acpi_tb_acquire_table().
152 ******************************************************************************/
154 void
155 acpi_tb_release_table(struct acpi_table_header *table,
156 u32 table_length, u8 table_flags)
159 switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
160 case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
162 acpi_os_unmap_memory(table, table_length);
163 break;
165 case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
166 case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
167 default:
169 break;
173 /*******************************************************************************
175 * FUNCTION: acpi_tb_acquire_temp_table
177 * PARAMETERS: table_desc - Table descriptor to be acquired
178 * address - Address of the table
179 * flags - Allocation flags of the table
181 * RETURN: Status
183 * DESCRIPTION: This function validates the table header to obtain the length
184 * of a table and fills the table descriptor to make its state as
185 * "INSTALLED". Such a table descriptor is only used for verified
186 * installation.
188 ******************************************************************************/
190 acpi_status
191 acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
192 acpi_physical_address address, u8 flags)
194 struct acpi_table_header *table_header;
196 switch (flags & ACPI_TABLE_ORIGIN_MASK) {
197 case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
199 /* Get the length of the full table from the header */
201 table_header =
202 acpi_os_map_memory(address,
203 sizeof(struct acpi_table_header));
204 if (!table_header) {
205 return (AE_NO_MEMORY);
208 acpi_tb_init_table_descriptor(table_desc, address, flags,
209 table_header);
210 acpi_os_unmap_memory(table_header,
211 sizeof(struct acpi_table_header));
212 return (AE_OK);
214 case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
215 case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
217 table_header = ACPI_CAST_PTR(struct acpi_table_header, address);
218 if (!table_header) {
219 return (AE_NO_MEMORY);
222 acpi_tb_init_table_descriptor(table_desc, address, flags,
223 table_header);
224 return (AE_OK);
226 default:
228 break;
231 /* Table is not valid yet */
233 return (AE_NO_MEMORY);
236 /*******************************************************************************
238 * FUNCTION: acpi_tb_release_temp_table
240 * PARAMETERS: table_desc - Table descriptor to be released
242 * RETURN: Status
244 * DESCRIPTION: The inverse of acpi_tb_acquire_temp_table().
246 *****************************************************************************/
248 void acpi_tb_release_temp_table(struct acpi_table_desc *table_desc)
252 * Note that the .Address is maintained by the callers of
253 * acpi_tb_acquire_temp_table(), thus do not invoke acpi_tb_uninstall_table()
254 * where .Address will be freed.
256 acpi_tb_invalidate_table(table_desc);
259 /******************************************************************************
261 * FUNCTION: acpi_tb_validate_table
263 * PARAMETERS: table_desc - Table descriptor
265 * RETURN: Status
267 * DESCRIPTION: This function is called to validate the table, the returned
268 * table descriptor is in "VALIDATED" state.
270 *****************************************************************************/
272 acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
274 acpi_status status = AE_OK;
276 ACPI_FUNCTION_TRACE(tb_validate_table);
278 /* Validate the table if necessary */
280 if (!table_desc->pointer) {
281 status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
282 &table_desc->length,
283 &table_desc->flags);
284 if (!table_desc->pointer) {
285 status = AE_NO_MEMORY;
289 return_ACPI_STATUS(status);
292 /*******************************************************************************
294 * FUNCTION: acpi_tb_invalidate_table
296 * PARAMETERS: table_desc - Table descriptor
298 * RETURN: None
300 * DESCRIPTION: Invalidate one internal ACPI table, this is the inverse of
301 * acpi_tb_validate_table().
303 ******************************************************************************/
305 void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
308 ACPI_FUNCTION_TRACE(tb_invalidate_table);
310 /* Table must be validated */
312 if (!table_desc->pointer) {
313 return_VOID;
316 acpi_tb_release_table(table_desc->pointer, table_desc->length,
317 table_desc->flags);
318 table_desc->pointer = NULL;
320 return_VOID;
323 /******************************************************************************
325 * FUNCTION: acpi_tb_validate_temp_table
327 * PARAMETERS: table_desc - Table descriptor
329 * RETURN: Status
331 * DESCRIPTION: This function is called to validate the table, the returned
332 * table descriptor is in "VALIDATED" state.
334 *****************************************************************************/
336 acpi_status acpi_tb_validate_temp_table(struct acpi_table_desc *table_desc)
339 if (!table_desc->pointer && !acpi_gbl_verify_table_checksum) {
341 * Only validates the header of the table.
342 * Note that Length contains the size of the mapping after invoking
343 * this work around, this value is required by
344 * acpi_tb_release_temp_table().
345 * We can do this because in acpi_init_table_descriptor(), the Length
346 * field of the installed descriptor is filled with the actual
347 * table length obtaining from the table header.
349 table_desc->length = sizeof(struct acpi_table_header);
352 return (acpi_tb_validate_table(table_desc));
355 /******************************************************************************
357 * FUNCTION: acpi_tb_verify_temp_table
359 * PARAMETERS: table_desc - Table descriptor
360 * signature - Table signature to verify
362 * RETURN: Status
364 * DESCRIPTION: This function is called to validate and verify the table, the
365 * returned table descriptor is in "VALIDATED" state.
367 *****************************************************************************/
369 acpi_status
370 acpi_tb_verify_temp_table(struct acpi_table_desc * table_desc, char *signature)
372 acpi_status status = AE_OK;
374 ACPI_FUNCTION_TRACE(tb_verify_temp_table);
376 /* Validate the table */
378 status = acpi_tb_validate_temp_table(table_desc);
379 if (ACPI_FAILURE(status)) {
380 return_ACPI_STATUS(AE_NO_MEMORY);
383 /* If a particular signature is expected (DSDT/FACS), it must match */
385 if (signature && !ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
386 ACPI_BIOS_ERROR((AE_INFO,
387 "Invalid signature 0x%X for ACPI table, expected [%s]",
388 table_desc->signature.integer, signature));
389 status = AE_BAD_SIGNATURE;
390 goto invalidate_and_exit;
393 /* Verify the checksum */
395 if (acpi_gbl_verify_table_checksum) {
396 status =
397 acpi_tb_verify_checksum(table_desc->pointer,
398 table_desc->length);
399 if (ACPI_FAILURE(status)) {
400 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
401 "%4.4s " ACPI_PRINTF_UINT
402 " Attempted table install failed",
403 acpi_ut_valid_acpi_name(table_desc->
404 signature.
405 ascii) ?
406 table_desc->signature.ascii : "????",
407 ACPI_FORMAT_TO_UINT(table_desc->
408 address)));
409 goto invalidate_and_exit;
413 return_ACPI_STATUS(AE_OK);
415 invalidate_and_exit:
416 acpi_tb_invalidate_table(table_desc);
417 return_ACPI_STATUS(status);
420 /*******************************************************************************
422 * FUNCTION: acpi_tb_resize_root_table_list
424 * PARAMETERS: None
426 * RETURN: Status
428 * DESCRIPTION: Expand the size of global table array
430 ******************************************************************************/
432 acpi_status acpi_tb_resize_root_table_list(void)
434 struct acpi_table_desc *tables;
435 u32 table_count;
437 ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
439 /* allow_resize flag is a parameter to acpi_initialize_tables */
441 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
442 ACPI_ERROR((AE_INFO,
443 "Resize of Root Table Array is not allowed"));
444 return_ACPI_STATUS(AE_SUPPORT);
447 /* Increase the Table Array size */
449 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
450 table_count = acpi_gbl_root_table_list.max_table_count;
451 } else {
452 table_count = acpi_gbl_root_table_list.current_table_count;
455 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
456 ACPI_ROOT_TABLE_SIZE_INCREMENT) *
457 sizeof(struct acpi_table_desc));
458 if (!tables) {
459 ACPI_ERROR((AE_INFO,
460 "Could not allocate new root table array"));
461 return_ACPI_STATUS(AE_NO_MEMORY);
464 /* Copy and free the previous table array */
466 if (acpi_gbl_root_table_list.tables) {
467 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
468 (acpi_size) table_count *
469 sizeof(struct acpi_table_desc));
471 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
472 ACPI_FREE(acpi_gbl_root_table_list.tables);
476 acpi_gbl_root_table_list.tables = tables;
477 acpi_gbl_root_table_list.max_table_count =
478 table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
479 acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
481 return_ACPI_STATUS(AE_OK);
484 /*******************************************************************************
486 * FUNCTION: acpi_tb_get_next_root_index
488 * PARAMETERS: table_index - Where table index is returned
490 * RETURN: Status and table index.
492 * DESCRIPTION: Allocate a new ACPI table entry to the global table list
494 ******************************************************************************/
496 acpi_status acpi_tb_get_next_root_index(u32 *table_index)
498 acpi_status status;
500 /* Ensure that there is room for the table in the Root Table List */
502 if (acpi_gbl_root_table_list.current_table_count >=
503 acpi_gbl_root_table_list.max_table_count) {
504 status = acpi_tb_resize_root_table_list();
505 if (ACPI_FAILURE(status)) {
506 return (status);
510 *table_index = acpi_gbl_root_table_list.current_table_count;
511 acpi_gbl_root_table_list.current_table_count++;
512 return (AE_OK);
515 /*******************************************************************************
517 * FUNCTION: acpi_tb_terminate
519 * PARAMETERS: None
521 * RETURN: None
523 * DESCRIPTION: Delete all internal ACPI tables
525 ******************************************************************************/
527 void acpi_tb_terminate(void)
529 u32 i;
531 ACPI_FUNCTION_TRACE(tb_terminate);
533 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
535 /* Delete the individual tables */
537 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
538 acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
542 * Delete the root table array if allocated locally. Array cannot be
543 * mapped, so we don't need to check for that flag.
545 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
546 ACPI_FREE(acpi_gbl_root_table_list.tables);
549 acpi_gbl_root_table_list.tables = NULL;
550 acpi_gbl_root_table_list.flags = 0;
551 acpi_gbl_root_table_list.current_table_count = 0;
553 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
555 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
556 return_VOID;
559 /*******************************************************************************
561 * FUNCTION: acpi_tb_delete_namespace_by_owner
563 * PARAMETERS: table_index - Table index
565 * RETURN: Status
567 * DESCRIPTION: Delete all namespace objects created when this table was loaded.
569 ******************************************************************************/
571 acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
573 acpi_owner_id owner_id;
574 acpi_status status;
576 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
578 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
579 if (ACPI_FAILURE(status)) {
580 return_ACPI_STATUS(status);
583 if (table_index >= acpi_gbl_root_table_list.current_table_count) {
585 /* The table index does not exist */
587 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
588 return_ACPI_STATUS(AE_NOT_EXIST);
591 /* Get the owner ID for this table, used to delete namespace nodes */
593 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
594 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
597 * Need to acquire the namespace writer lock to prevent interference
598 * with any concurrent namespace walks. The interpreter must be
599 * released during the deletion since the acquisition of the deletion
600 * lock may block, and also since the execution of a namespace walk
601 * must be allowed to use the interpreter.
603 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
604 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
606 acpi_ns_delete_namespace_by_owner(owner_id);
607 if (ACPI_FAILURE(status)) {
608 return_ACPI_STATUS(status);
611 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
613 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
614 return_ACPI_STATUS(status);
617 /*******************************************************************************
619 * FUNCTION: acpi_tb_allocate_owner_id
621 * PARAMETERS: table_index - Table index
623 * RETURN: Status
625 * DESCRIPTION: Allocates owner_id in table_desc
627 ******************************************************************************/
629 acpi_status acpi_tb_allocate_owner_id(u32 table_index)
631 acpi_status status = AE_BAD_PARAMETER;
633 ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
635 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
636 if (table_index < acpi_gbl_root_table_list.current_table_count) {
637 status =
638 acpi_ut_allocate_owner_id(&
639 (acpi_gbl_root_table_list.
640 tables[table_index].owner_id));
643 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
644 return_ACPI_STATUS(status);
647 /*******************************************************************************
649 * FUNCTION: acpi_tb_release_owner_id
651 * PARAMETERS: table_index - Table index
653 * RETURN: Status
655 * DESCRIPTION: Releases owner_id in table_desc
657 ******************************************************************************/
659 acpi_status acpi_tb_release_owner_id(u32 table_index)
661 acpi_status status = AE_BAD_PARAMETER;
663 ACPI_FUNCTION_TRACE(tb_release_owner_id);
665 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
666 if (table_index < acpi_gbl_root_table_list.current_table_count) {
667 acpi_ut_release_owner_id(&
668 (acpi_gbl_root_table_list.
669 tables[table_index].owner_id));
670 status = AE_OK;
673 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
674 return_ACPI_STATUS(status);
677 /*******************************************************************************
679 * FUNCTION: acpi_tb_get_owner_id
681 * PARAMETERS: table_index - Table index
682 * owner_id - Where the table owner_id is returned
684 * RETURN: Status
686 * DESCRIPTION: returns owner_id for the ACPI table
688 ******************************************************************************/
690 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id * owner_id)
692 acpi_status status = AE_BAD_PARAMETER;
694 ACPI_FUNCTION_TRACE(tb_get_owner_id);
696 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
697 if (table_index < acpi_gbl_root_table_list.current_table_count) {
698 *owner_id =
699 acpi_gbl_root_table_list.tables[table_index].owner_id;
700 status = AE_OK;
703 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
704 return_ACPI_STATUS(status);
707 /*******************************************************************************
709 * FUNCTION: acpi_tb_is_table_loaded
711 * PARAMETERS: table_index - Index into the root table
713 * RETURN: Table Loaded Flag
715 ******************************************************************************/
717 u8 acpi_tb_is_table_loaded(u32 table_index)
719 u8 is_loaded = FALSE;
721 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
722 if (table_index < acpi_gbl_root_table_list.current_table_count) {
723 is_loaded = (u8)
724 (acpi_gbl_root_table_list.tables[table_index].flags &
725 ACPI_TABLE_IS_LOADED);
728 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
729 return (is_loaded);
732 /*******************************************************************************
734 * FUNCTION: acpi_tb_set_table_loaded_flag
736 * PARAMETERS: table_index - Table index
737 * is_loaded - TRUE if table is loaded, FALSE otherwise
739 * RETURN: None
741 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
743 ******************************************************************************/
745 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
748 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
749 if (table_index < acpi_gbl_root_table_list.current_table_count) {
750 if (is_loaded) {
751 acpi_gbl_root_table_list.tables[table_index].flags |=
752 ACPI_TABLE_IS_LOADED;
753 } else {
754 acpi_gbl_root_table_list.tables[table_index].flags &=
755 ~ACPI_TABLE_IS_LOADED;
759 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);