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b0ed7a91 LM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utosi - Support for the _OSI predefined control method | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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 | { | |
388a9902 | 111 | acpi_status status; |
b0ed7a91 LM |
112 | u32 i; |
113 | ||
388a9902 JK |
114 | status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); |
115 | if (ACPI_FAILURE(status)) { | |
116 | return (status); | |
117 | } | |
118 | ||
b0ed7a91 LM |
119 | acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; |
120 | ||
121 | /* Link the static list of supported interfaces */ | |
122 | ||
123 | for (i = 0; | |
124 | i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); | |
125 | i++) { | |
126 | acpi_default_supported_interfaces[i].next = | |
127 | &acpi_default_supported_interfaces[(acpi_size) i + 1]; | |
128 | } | |
129 | ||
130 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
131 | return (AE_OK); | |
132 | } | |
133 | ||
134 | /******************************************************************************* | |
135 | * | |
136 | * FUNCTION: acpi_ut_interface_terminate | |
137 | * | |
138 | * PARAMETERS: None | |
139 | * | |
388a9902 | 140 | * RETURN: Status |
b0ed7a91 LM |
141 | * |
142 | * DESCRIPTION: Delete all interfaces in the global list. Sets | |
143 | * acpi_gbl_supported_interfaces to NULL. | |
144 | * | |
145 | ******************************************************************************/ | |
146 | ||
388a9902 | 147 | acpi_status acpi_ut_interface_terminate(void) |
b0ed7a91 | 148 | { |
388a9902 | 149 | acpi_status status; |
b0ed7a91 LM |
150 | struct acpi_interface_info *next_interface; |
151 | ||
388a9902 JK |
152 | status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); |
153 | if (ACPI_FAILURE(status)) { | |
154 | return (status); | |
155 | } | |
b0ed7a91 | 156 | |
388a9902 | 157 | next_interface = acpi_gbl_supported_interfaces; |
b0ed7a91 LM |
158 | while (next_interface) { |
159 | acpi_gbl_supported_interfaces = next_interface->next; | |
160 | ||
161 | /* Only interfaces added at runtime can be freed */ | |
162 | ||
163 | if (next_interface->flags & ACPI_OSI_DYNAMIC) { | |
164 | ACPI_FREE(next_interface->name); | |
165 | ACPI_FREE(next_interface); | |
166 | } | |
167 | ||
168 | next_interface = acpi_gbl_supported_interfaces; | |
169 | } | |
170 | ||
171 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
388a9902 | 172 | return (AE_OK); |
b0ed7a91 LM |
173 | } |
174 | ||
175 | /******************************************************************************* | |
176 | * | |
177 | * FUNCTION: acpi_ut_install_interface | |
178 | * | |
179 | * PARAMETERS: interface_name - The interface to install | |
180 | * | |
181 | * RETURN: Status | |
182 | * | |
183 | * DESCRIPTION: Install the interface into the global interface list. | |
184 | * Caller MUST hold acpi_gbl_osi_mutex | |
185 | * | |
186 | ******************************************************************************/ | |
187 | ||
188 | acpi_status acpi_ut_install_interface(acpi_string interface_name) | |
189 | { | |
190 | struct acpi_interface_info *interface_info; | |
191 | ||
192 | /* Allocate info block and space for the name string */ | |
193 | ||
194 | interface_info = | |
195 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); | |
196 | if (!interface_info) { | |
197 | return (AE_NO_MEMORY); | |
198 | } | |
199 | ||
200 | interface_info->name = | |
201 | ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1); | |
202 | if (!interface_info->name) { | |
203 | ACPI_FREE(interface_info); | |
204 | return (AE_NO_MEMORY); | |
205 | } | |
206 | ||
207 | /* Initialize new info and insert at the head of the global list */ | |
208 | ||
209 | ACPI_STRCPY(interface_info->name, interface_name); | |
210 | interface_info->flags = ACPI_OSI_DYNAMIC; | |
211 | interface_info->next = acpi_gbl_supported_interfaces; | |
212 | ||
213 | acpi_gbl_supported_interfaces = interface_info; | |
214 | return (AE_OK); | |
215 | } | |
216 | ||
217 | /******************************************************************************* | |
218 | * | |
219 | * FUNCTION: acpi_ut_remove_interface | |
220 | * | |
221 | * PARAMETERS: interface_name - The interface to remove | |
222 | * | |
223 | * RETURN: Status | |
224 | * | |
225 | * DESCRIPTION: Remove the interface from the global interface list. | |
226 | * Caller MUST hold acpi_gbl_osi_mutex | |
227 | * | |
228 | ******************************************************************************/ | |
229 | ||
230 | acpi_status acpi_ut_remove_interface(acpi_string interface_name) | |
231 | { | |
232 | struct acpi_interface_info *previous_interface; | |
233 | struct acpi_interface_info *next_interface; | |
234 | ||
235 | previous_interface = next_interface = acpi_gbl_supported_interfaces; | |
236 | while (next_interface) { | |
237 | if (!ACPI_STRCMP(interface_name, next_interface->name)) { | |
238 | ||
239 | /* Found: name is in either the static list or was added at runtime */ | |
240 | ||
241 | if (next_interface->flags & ACPI_OSI_DYNAMIC) { | |
242 | ||
243 | /* Interface was added dynamically, remove and free it */ | |
244 | ||
245 | if (previous_interface == next_interface) { | |
246 | acpi_gbl_supported_interfaces = | |
247 | next_interface->next; | |
248 | } else { | |
249 | previous_interface->next = | |
250 | next_interface->next; | |
251 | } | |
252 | ||
253 | ACPI_FREE(next_interface->name); | |
254 | ACPI_FREE(next_interface); | |
255 | } else { | |
256 | /* | |
257 | * Interface is in static list. If marked invalid, then it | |
258 | * does not actually exist. Else, mark it invalid. | |
259 | */ | |
260 | if (next_interface->flags & ACPI_OSI_INVALID) { | |
261 | return (AE_NOT_EXIST); | |
262 | } | |
263 | ||
264 | next_interface->flags |= ACPI_OSI_INVALID; | |
265 | } | |
266 | ||
267 | return (AE_OK); | |
268 | } | |
269 | ||
270 | previous_interface = next_interface; | |
271 | next_interface = next_interface->next; | |
272 | } | |
273 | ||
274 | /* Interface was not found */ | |
275 | ||
276 | return (AE_NOT_EXIST); | |
277 | } | |
278 | ||
279 | /******************************************************************************* | |
280 | * | |
281 | * FUNCTION: acpi_ut_get_interface | |
282 | * | |
283 | * PARAMETERS: interface_name - The interface to find | |
284 | * | |
285 | * RETURN: struct acpi_interface_info if found. NULL if not found. | |
286 | * | |
287 | * DESCRIPTION: Search for the specified interface name in the global list. | |
288 | * Caller MUST hold acpi_gbl_osi_mutex | |
289 | * | |
290 | ******************************************************************************/ | |
291 | ||
292 | struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) | |
293 | { | |
294 | struct acpi_interface_info *next_interface; | |
295 | ||
296 | next_interface = acpi_gbl_supported_interfaces; | |
297 | while (next_interface) { | |
298 | if (!ACPI_STRCMP(interface_name, next_interface->name)) { | |
299 | return (next_interface); | |
300 | } | |
301 | ||
302 | next_interface = next_interface->next; | |
303 | } | |
304 | ||
305 | return (NULL); | |
306 | } | |
307 | ||
308 | /******************************************************************************* | |
309 | * | |
310 | * FUNCTION: acpi_ut_osi_implementation | |
311 | * | |
312 | * PARAMETERS: walk_state - Current walk state | |
313 | * | |
314 | * RETURN: Status | |
315 | * | |
316 | * DESCRIPTION: Implementation of the _OSI predefined control method. When | |
317 | * an invocation of _OSI is encountered in the system AML, | |
318 | * control is transferred to this function. | |
319 | * | |
320 | ******************************************************************************/ | |
321 | ||
322 | acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state) | |
323 | { | |
324 | union acpi_operand_object *string_desc; | |
325 | union acpi_operand_object *return_desc; | |
326 | struct acpi_interface_info *interface_info; | |
327 | acpi_interface_handler interface_handler; | |
388a9902 | 328 | acpi_status status; |
b0ed7a91 LM |
329 | u32 return_value; |
330 | ||
331 | ACPI_FUNCTION_TRACE(ut_osi_implementation); | |
332 | ||
333 | /* Validate the string input argument (from the AML caller) */ | |
334 | ||
335 | string_desc = walk_state->arguments[0].object; | |
336 | if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { | |
337 | return_ACPI_STATUS(AE_TYPE); | |
338 | } | |
339 | ||
340 | /* Create a return object */ | |
341 | ||
342 | return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); | |
343 | if (!return_desc) { | |
344 | return_ACPI_STATUS(AE_NO_MEMORY); | |
345 | } | |
346 | ||
347 | /* Default return value is 0, NOT SUPPORTED */ | |
348 | ||
349 | return_value = 0; | |
388a9902 JK |
350 | status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); |
351 | if (ACPI_FAILURE(status)) { | |
3aa2eeac JK |
352 | acpi_ut_remove_reference(return_desc); |
353 | return_ACPI_STATUS(status); | |
388a9902 | 354 | } |
b0ed7a91 LM |
355 | |
356 | /* Lookup the interface in the global _OSI list */ | |
357 | ||
358 | interface_info = acpi_ut_get_interface(string_desc->string.pointer); | |
359 | if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { | |
360 | /* | |
361 | * The interface is supported. | |
362 | * Update the osi_data if necessary. We keep track of the latest | |
363 | * version of Windows that has been requested by the BIOS. | |
364 | */ | |
365 | if (interface_info->value > acpi_gbl_osi_data) { | |
366 | acpi_gbl_osi_data = interface_info->value; | |
367 | } | |
368 | ||
369 | return_value = ACPI_UINT32_MAX; | |
370 | } | |
371 | ||
372 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
373 | ||
374 | /* | |
375 | * Invoke an optional _OSI interface handler. The host OS may wish | |
376 | * to do some interface-specific handling. For example, warn about | |
377 | * certain interfaces or override the true/false support value. | |
378 | */ | |
379 | interface_handler = acpi_gbl_interface_handler; | |
380 | if (interface_handler) { | |
381 | return_value = | |
382 | interface_handler(string_desc->string.pointer, | |
383 | return_value); | |
384 | } | |
385 | ||
386 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
387 | "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", | |
388 | string_desc->string.pointer, | |
389 | return_value == 0 ? "not " : "")); | |
390 | ||
391 | /* Complete the return object */ | |
392 | ||
393 | return_desc->integer.value = return_value; | |
394 | walk_state->return_desc = return_desc; | |
395 | return_ACPI_STATUS(AE_OK); | |
396 | } |