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1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utosi - Support for the _OSI predefined control method | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, Intel Corp. |
b0ed7a91 LM |
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> | |
45 | #include "accommon.h" | |
46 | ||
47 | #define _COMPONENT ACPI_UTILITIES | |
48 | ACPI_MODULE_NAME("utosi") | |
49 | ||
50 | /* | |
51 | * Strings supported by the _OSI predefined control method (which is | |
52 | * implemented internally within this module.) | |
53 | * | |
54 | * March 2009: Removed "Linux" as this host no longer wants to respond true | |
55 | * for this string. Basically, the only safe OS strings are windows-related | |
56 | * and in many or most cases represent the only test path within the | |
57 | * BIOS-provided ASL code. | |
58 | * | |
59 | * The last element of each entry is used to track the newest version of | |
60 | * Windows that the BIOS has requested. | |
61 | */ | |
62 | static struct acpi_interface_info acpi_default_supported_interfaces[] = { | |
63 | /* Operating System Vendor Strings */ | |
64 | ||
65 | {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ | |
66 | {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ | |
67 | {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ | |
68 | {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ | |
69 | {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ | |
70 | {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ | |
ba494bee | 71 | {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows vista - Added 03/2006 */ |
b0ed7a91 LM |
72 | {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ |
73 | {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ | |
23ebbf07 | 74 | {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ |
b0ed7a91 | 75 | {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ |
a57f7f91 | 76 | {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ |
b0ed7a91 LM |
77 | |
78 | /* Feature Group Strings */ | |
79 | ||
80 | {"Extended Address Space Descriptor", NULL, 0, 0} | |
81 | ||
82 | /* | |
83 | * All "optional" feature group strings (features that are implemented | |
84 | * by the host) should be dynamically added by the host via | |
85 | * acpi_install_interface and should not be manually added here. | |
86 | * | |
87 | * Examples of optional feature group strings: | |
88 | * | |
89 | * "Module Device" | |
90 | * "Processor Device" | |
91 | * "3.0 Thermal Model" | |
92 | * "3.0 _SCP Extensions" | |
93 | * "Processor Aggregator Device" | |
94 | */ | |
95 | }; | |
96 | ||
97 | /******************************************************************************* | |
98 | * | |
99 | * FUNCTION: acpi_ut_initialize_interfaces | |
100 | * | |
101 | * PARAMETERS: None | |
102 | * | |
103 | * RETURN: Status | |
104 | * | |
105 | * DESCRIPTION: Initialize the global _OSI supported interfaces list | |
106 | * | |
107 | ******************************************************************************/ | |
108 | ||
109 | acpi_status acpi_ut_initialize_interfaces(void) | |
110 | { | |
111 | u32 i; | |
112 | ||
113 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
114 | acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; | |
115 | ||
116 | /* Link the static list of supported interfaces */ | |
117 | ||
118 | for (i = 0; | |
119 | i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); | |
120 | i++) { | |
121 | acpi_default_supported_interfaces[i].next = | |
122 | &acpi_default_supported_interfaces[(acpi_size) i + 1]; | |
123 | } | |
124 | ||
125 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
126 | return (AE_OK); | |
127 | } | |
128 | ||
129 | /******************************************************************************* | |
130 | * | |
131 | * FUNCTION: acpi_ut_interface_terminate | |
132 | * | |
133 | * PARAMETERS: None | |
134 | * | |
135 | * RETURN: None | |
136 | * | |
137 | * DESCRIPTION: Delete all interfaces in the global list. Sets | |
138 | * acpi_gbl_supported_interfaces to NULL. | |
139 | * | |
140 | ******************************************************************************/ | |
141 | ||
142 | void acpi_ut_interface_terminate(void) | |
143 | { | |
144 | struct acpi_interface_info *next_interface; | |
145 | ||
146 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
147 | next_interface = acpi_gbl_supported_interfaces; | |
148 | ||
149 | while (next_interface) { | |
150 | acpi_gbl_supported_interfaces = next_interface->next; | |
151 | ||
152 | /* Only interfaces added at runtime can be freed */ | |
153 | ||
154 | if (next_interface->flags & ACPI_OSI_DYNAMIC) { | |
155 | ACPI_FREE(next_interface->name); | |
156 | ACPI_FREE(next_interface); | |
157 | } | |
158 | ||
159 | next_interface = acpi_gbl_supported_interfaces; | |
160 | } | |
161 | ||
162 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
163 | } | |
164 | ||
165 | /******************************************************************************* | |
166 | * | |
167 | * FUNCTION: acpi_ut_install_interface | |
168 | * | |
169 | * PARAMETERS: interface_name - The interface to install | |
170 | * | |
171 | * RETURN: Status | |
172 | * | |
173 | * DESCRIPTION: Install the interface into the global interface list. | |
174 | * Caller MUST hold acpi_gbl_osi_mutex | |
175 | * | |
176 | ******************************************************************************/ | |
177 | ||
178 | acpi_status acpi_ut_install_interface(acpi_string interface_name) | |
179 | { | |
180 | struct acpi_interface_info *interface_info; | |
181 | ||
182 | /* Allocate info block and space for the name string */ | |
183 | ||
184 | interface_info = | |
185 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); | |
186 | if (!interface_info) { | |
187 | return (AE_NO_MEMORY); | |
188 | } | |
189 | ||
190 | interface_info->name = | |
191 | ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1); | |
192 | if (!interface_info->name) { | |
193 | ACPI_FREE(interface_info); | |
194 | return (AE_NO_MEMORY); | |
195 | } | |
196 | ||
197 | /* Initialize new info and insert at the head of the global list */ | |
198 | ||
199 | ACPI_STRCPY(interface_info->name, interface_name); | |
200 | interface_info->flags = ACPI_OSI_DYNAMIC; | |
201 | interface_info->next = acpi_gbl_supported_interfaces; | |
202 | ||
203 | acpi_gbl_supported_interfaces = interface_info; | |
204 | return (AE_OK); | |
205 | } | |
206 | ||
207 | /******************************************************************************* | |
208 | * | |
209 | * FUNCTION: acpi_ut_remove_interface | |
210 | * | |
211 | * PARAMETERS: interface_name - The interface to remove | |
212 | * | |
213 | * RETURN: Status | |
214 | * | |
215 | * DESCRIPTION: Remove the interface from the global interface list. | |
216 | * Caller MUST hold acpi_gbl_osi_mutex | |
217 | * | |
218 | ******************************************************************************/ | |
219 | ||
220 | acpi_status acpi_ut_remove_interface(acpi_string interface_name) | |
221 | { | |
222 | struct acpi_interface_info *previous_interface; | |
223 | struct acpi_interface_info *next_interface; | |
224 | ||
225 | previous_interface = next_interface = acpi_gbl_supported_interfaces; | |
226 | while (next_interface) { | |
227 | if (!ACPI_STRCMP(interface_name, next_interface->name)) { | |
228 | ||
229 | /* Found: name is in either the static list or was added at runtime */ | |
230 | ||
231 | if (next_interface->flags & ACPI_OSI_DYNAMIC) { | |
232 | ||
233 | /* Interface was added dynamically, remove and free it */ | |
234 | ||
235 | if (previous_interface == next_interface) { | |
236 | acpi_gbl_supported_interfaces = | |
237 | next_interface->next; | |
238 | } else { | |
239 | previous_interface->next = | |
240 | next_interface->next; | |
241 | } | |
242 | ||
243 | ACPI_FREE(next_interface->name); | |
244 | ACPI_FREE(next_interface); | |
245 | } else { | |
246 | /* | |
247 | * Interface is in static list. If marked invalid, then it | |
248 | * does not actually exist. Else, mark it invalid. | |
249 | */ | |
250 | if (next_interface->flags & ACPI_OSI_INVALID) { | |
251 | return (AE_NOT_EXIST); | |
252 | } | |
253 | ||
254 | next_interface->flags |= ACPI_OSI_INVALID; | |
255 | } | |
256 | ||
257 | return (AE_OK); | |
258 | } | |
259 | ||
260 | previous_interface = next_interface; | |
261 | next_interface = next_interface->next; | |
262 | } | |
263 | ||
264 | /* Interface was not found */ | |
265 | ||
266 | return (AE_NOT_EXIST); | |
267 | } | |
268 | ||
269 | /******************************************************************************* | |
270 | * | |
271 | * FUNCTION: acpi_ut_get_interface | |
272 | * | |
273 | * PARAMETERS: interface_name - The interface to find | |
274 | * | |
275 | * RETURN: struct acpi_interface_info if found. NULL if not found. | |
276 | * | |
277 | * DESCRIPTION: Search for the specified interface name in the global list. | |
278 | * Caller MUST hold acpi_gbl_osi_mutex | |
279 | * | |
280 | ******************************************************************************/ | |
281 | ||
282 | struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) | |
283 | { | |
284 | struct acpi_interface_info *next_interface; | |
285 | ||
286 | next_interface = acpi_gbl_supported_interfaces; | |
287 | while (next_interface) { | |
288 | if (!ACPI_STRCMP(interface_name, next_interface->name)) { | |
289 | return (next_interface); | |
290 | } | |
291 | ||
292 | next_interface = next_interface->next; | |
293 | } | |
294 | ||
295 | return (NULL); | |
296 | } | |
297 | ||
298 | /******************************************************************************* | |
299 | * | |
300 | * FUNCTION: acpi_ut_osi_implementation | |
301 | * | |
302 | * PARAMETERS: walk_state - Current walk state | |
303 | * | |
304 | * RETURN: Status | |
305 | * | |
306 | * DESCRIPTION: Implementation of the _OSI predefined control method. When | |
307 | * an invocation of _OSI is encountered in the system AML, | |
308 | * control is transferred to this function. | |
309 | * | |
310 | ******************************************************************************/ | |
311 | ||
312 | acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state) | |
313 | { | |
314 | union acpi_operand_object *string_desc; | |
315 | union acpi_operand_object *return_desc; | |
316 | struct acpi_interface_info *interface_info; | |
317 | acpi_interface_handler interface_handler; | |
318 | u32 return_value; | |
319 | ||
320 | ACPI_FUNCTION_TRACE(ut_osi_implementation); | |
321 | ||
322 | /* Validate the string input argument (from the AML caller) */ | |
323 | ||
324 | string_desc = walk_state->arguments[0].object; | |
325 | if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { | |
326 | return_ACPI_STATUS(AE_TYPE); | |
327 | } | |
328 | ||
329 | /* Create a return object */ | |
330 | ||
331 | return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); | |
332 | if (!return_desc) { | |
333 | return_ACPI_STATUS(AE_NO_MEMORY); | |
334 | } | |
335 | ||
336 | /* Default return value is 0, NOT SUPPORTED */ | |
337 | ||
338 | return_value = 0; | |
339 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
340 | ||
341 | /* Lookup the interface in the global _OSI list */ | |
342 | ||
343 | interface_info = acpi_ut_get_interface(string_desc->string.pointer); | |
344 | if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { | |
345 | /* | |
346 | * The interface is supported. | |
347 | * Update the osi_data if necessary. We keep track of the latest | |
348 | * version of Windows that has been requested by the BIOS. | |
349 | */ | |
350 | if (interface_info->value > acpi_gbl_osi_data) { | |
351 | acpi_gbl_osi_data = interface_info->value; | |
352 | } | |
353 | ||
354 | return_value = ACPI_UINT32_MAX; | |
355 | } | |
356 | ||
357 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
358 | ||
359 | /* | |
360 | * Invoke an optional _OSI interface handler. The host OS may wish | |
361 | * to do some interface-specific handling. For example, warn about | |
362 | * certain interfaces or override the true/false support value. | |
363 | */ | |
364 | interface_handler = acpi_gbl_interface_handler; | |
365 | if (interface_handler) { | |
366 | return_value = | |
367 | interface_handler(string_desc->string.pointer, | |
368 | return_value); | |
369 | } | |
370 | ||
371 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
372 | "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", | |
373 | string_desc->string.pointer, | |
374 | return_value == 0 ? "not " : "")); | |
375 | ||
376 | /* Complete the return object */ | |
377 | ||
378 | return_desc->integer.value = return_value; | |
379 | walk_state->return_desc = return_desc; | |
380 | return_ACPI_STATUS(AE_OK); | |
381 | } |