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f3d2e786 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbfind - find table | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
f3d2e786 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 | ||
44 | #include <acpi/acpi.h> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "actables.h" | |
f3d2e786 BM |
47 | |
48 | #define _COMPONENT ACPI_TABLES | |
49 | ACPI_MODULE_NAME("tbfind") | |
50 | ||
51 | /******************************************************************************* | |
52 | * | |
53 | * FUNCTION: acpi_tb_find_table | |
54 | * | |
ba494bee | 55 | * PARAMETERS: signature - String with ACPI table signature |
f3d2e786 BM |
56 | * oem_id - String with the table OEM ID |
57 | * oem_table_id - String with the OEM Table ID | |
58 | * table_index - Where the table index is returned | |
59 | * | |
60 | * RETURN: Status and table index | |
61 | * | |
62 | * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the | |
63 | * Signature, OEM ID and OEM Table ID. Returns an index that can | |
64 | * be used to get the table header or entire table. | |
65 | * | |
66 | ******************************************************************************/ | |
67 | acpi_status | |
68 | acpi_tb_find_table(char *signature, | |
67a119f9 | 69 | char *oem_id, char *oem_table_id, u32 *table_index) |
f3d2e786 | 70 | { |
ac0f06eb | 71 | acpi_status status = AE_OK; |
47c08729 | 72 | struct acpi_table_header header; |
9f41fd8a | 73 | u32 i; |
f3d2e786 BM |
74 | |
75 | ACPI_FUNCTION_TRACE(tb_find_table); | |
76 | ||
9f41fd8a BM |
77 | /* Validate the input table signature */ |
78 | ||
6a0df32c | 79 | if (!acpi_ut_valid_nameseg(signature)) { |
9f41fd8a BM |
80 | return_ACPI_STATUS(AE_BAD_SIGNATURE); |
81 | } | |
82 | ||
83 | /* Don't allow the OEM strings to be too long */ | |
84 | ||
85 | if ((strlen(oem_id) > ACPI_OEM_ID_SIZE) || | |
86 | (strlen(oem_table_id) > ACPI_OEM_TABLE_ID_SIZE)) { | |
87 | return_ACPI_STATUS(AE_AML_STRING_LIMIT); | |
88 | } | |
89 | ||
47c08729 LM |
90 | /* Normalize the input strings */ |
91 | ||
4fa4616e | 92 | memset(&header, 0, sizeof(struct acpi_table_header)); |
eed9525a | 93 | ACPI_MOVE_NAME(header.signature, signature); |
4fa4616e BM |
94 | strncpy(header.oem_id, oem_id, ACPI_OEM_ID_SIZE); |
95 | strncpy(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE); | |
47c08729 LM |
96 | |
97 | /* Search for the table */ | |
98 | ||
ac0f06eb | 99 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
b9ee2043 | 100 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { |
4fa4616e BM |
101 | if (memcmp(&(acpi_gbl_root_table_list.tables[i].signature), |
102 | header.signature, ACPI_NAME_SIZE)) { | |
f3d2e786 BM |
103 | |
104 | /* Not the requested table */ | |
105 | ||
106 | continue; | |
107 | } | |
108 | ||
109 | /* Table with matching signature has been found */ | |
110 | ||
111 | if (!acpi_gbl_root_table_list.tables[i].pointer) { | |
112 | ||
113 | /* Table is not currently mapped, map it */ | |
114 | ||
115 | status = | |
7f9fc99c LZ |
116 | acpi_tb_validate_table(&acpi_gbl_root_table_list. |
117 | tables[i]); | |
f3d2e786 | 118 | if (ACPI_FAILURE(status)) { |
ac0f06eb | 119 | goto unlock_and_exit; |
f3d2e786 BM |
120 | } |
121 | ||
122 | if (!acpi_gbl_root_table_list.tables[i].pointer) { | |
123 | continue; | |
124 | } | |
125 | } | |
126 | ||
127 | /* Check for table match on all IDs */ | |
128 | ||
4fa4616e | 129 | if (!memcmp |
f3d2e786 | 130 | (acpi_gbl_root_table_list.tables[i].pointer->signature, |
47c08729 LM |
131 | header.signature, ACPI_NAME_SIZE) && (!oem_id[0] |
132 | || | |
4fa4616e | 133 | !memcmp |
47c08729 LM |
134 | (acpi_gbl_root_table_list. |
135 | tables[i].pointer-> | |
136 | oem_id, | |
137 | header.oem_id, | |
138 | ACPI_OEM_ID_SIZE)) | |
f3d2e786 | 139 | && (!oem_table_id[0] |
4fa4616e BM |
140 | || !memcmp(acpi_gbl_root_table_list.tables[i].pointer-> |
141 | oem_table_id, header.oem_table_id, | |
142 | ACPI_OEM_TABLE_ID_SIZE))) { | |
f3d2e786 BM |
143 | *table_index = i; |
144 | ||
145 | ACPI_DEBUG_PRINT((ACPI_DB_TABLES, | |
47c08729 LM |
146 | "Found table [%4.4s]\n", |
147 | header.signature)); | |
ac0f06eb | 148 | goto unlock_and_exit; |
f3d2e786 BM |
149 | } |
150 | } | |
ac0f06eb | 151 | status = AE_NOT_FOUND; |
f3d2e786 | 152 | |
ac0f06eb LZ |
153 | unlock_and_exit: |
154 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
86ec64bc | 155 | return_ACPI_STATUS(status); |
f3d2e786 | 156 | } |