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1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utosi - Support for the _OSI predefined control method | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, 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 */ | |
71 | {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ | |
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 LM |
75 | {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ |
76 | ||
77 | /* Feature Group Strings */ | |
78 | ||
79 | {"Extended Address Space Descriptor", NULL, 0, 0} | |
80 | ||
81 | /* | |
82 | * All "optional" feature group strings (features that are implemented | |
83 | * by the host) should be dynamically added by the host via | |
84 | * acpi_install_interface and should not be manually added here. | |
85 | * | |
86 | * Examples of optional feature group strings: | |
87 | * | |
88 | * "Module Device" | |
89 | * "Processor Device" | |
90 | * "3.0 Thermal Model" | |
91 | * "3.0 _SCP Extensions" | |
92 | * "Processor Aggregator Device" | |
93 | */ | |
94 | }; | |
95 | ||
96 | /******************************************************************************* | |
97 | * | |
98 | * FUNCTION: acpi_ut_initialize_interfaces | |
99 | * | |
100 | * PARAMETERS: None | |
101 | * | |
102 | * RETURN: Status | |
103 | * | |
104 | * DESCRIPTION: Initialize the global _OSI supported interfaces list | |
105 | * | |
106 | ******************************************************************************/ | |
107 | ||
108 | acpi_status acpi_ut_initialize_interfaces(void) | |
109 | { | |
110 | u32 i; | |
111 | ||
112 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
113 | acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; | |
114 | ||
115 | /* Link the static list of supported interfaces */ | |
116 | ||
117 | for (i = 0; | |
118 | i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); | |
119 | i++) { | |
120 | acpi_default_supported_interfaces[i].next = | |
121 | &acpi_default_supported_interfaces[(acpi_size) i + 1]; | |
122 | } | |
123 | ||
124 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
125 | return (AE_OK); | |
126 | } | |
127 | ||
128 | /******************************************************************************* | |
129 | * | |
130 | * FUNCTION: acpi_ut_interface_terminate | |
131 | * | |
132 | * PARAMETERS: None | |
133 | * | |
134 | * RETURN: None | |
135 | * | |
136 | * DESCRIPTION: Delete all interfaces in the global list. Sets | |
137 | * acpi_gbl_supported_interfaces to NULL. | |
138 | * | |
139 | ******************************************************************************/ | |
140 | ||
141 | void acpi_ut_interface_terminate(void) | |
142 | { | |
143 | struct acpi_interface_info *next_interface; | |
144 | ||
145 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
146 | next_interface = acpi_gbl_supported_interfaces; | |
147 | ||
148 | while (next_interface) { | |
149 | acpi_gbl_supported_interfaces = next_interface->next; | |
150 | ||
151 | /* Only interfaces added at runtime can be freed */ | |
152 | ||
153 | if (next_interface->flags & ACPI_OSI_DYNAMIC) { | |
154 | ACPI_FREE(next_interface->name); | |
155 | ACPI_FREE(next_interface); | |
156 | } | |
157 | ||
158 | next_interface = acpi_gbl_supported_interfaces; | |
159 | } | |
160 | ||
161 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
162 | } | |
163 | ||
164 | /******************************************************************************* | |
165 | * | |
166 | * FUNCTION: acpi_ut_install_interface | |
167 | * | |
168 | * PARAMETERS: interface_name - The interface to install | |
169 | * | |
170 | * RETURN: Status | |
171 | * | |
172 | * DESCRIPTION: Install the interface into the global interface list. | |
173 | * Caller MUST hold acpi_gbl_osi_mutex | |
174 | * | |
175 | ******************************************************************************/ | |
176 | ||
177 | acpi_status acpi_ut_install_interface(acpi_string interface_name) | |
178 | { | |
179 | struct acpi_interface_info *interface_info; | |
180 | ||
181 | /* Allocate info block and space for the name string */ | |
182 | ||
183 | interface_info = | |
184 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); | |
185 | if (!interface_info) { | |
186 | return (AE_NO_MEMORY); | |
187 | } | |
188 | ||
189 | interface_info->name = | |
190 | ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1); | |
191 | if (!interface_info->name) { | |
192 | ACPI_FREE(interface_info); | |
193 | return (AE_NO_MEMORY); | |
194 | } | |
195 | ||
196 | /* Initialize new info and insert at the head of the global list */ | |
197 | ||
198 | ACPI_STRCPY(interface_info->name, interface_name); | |
199 | interface_info->flags = ACPI_OSI_DYNAMIC; | |
200 | interface_info->next = acpi_gbl_supported_interfaces; | |
201 | ||
202 | acpi_gbl_supported_interfaces = interface_info; | |
203 | return (AE_OK); | |
204 | } | |
205 | ||
206 | /******************************************************************************* | |
207 | * | |
208 | * FUNCTION: acpi_ut_remove_interface | |
209 | * | |
210 | * PARAMETERS: interface_name - The interface to remove | |
211 | * | |
212 | * RETURN: Status | |
213 | * | |
214 | * DESCRIPTION: Remove the interface from the global interface list. | |
215 | * Caller MUST hold acpi_gbl_osi_mutex | |
216 | * | |
217 | ******************************************************************************/ | |
218 | ||
219 | acpi_status acpi_ut_remove_interface(acpi_string interface_name) | |
220 | { | |
221 | struct acpi_interface_info *previous_interface; | |
222 | struct acpi_interface_info *next_interface; | |
223 | ||
224 | previous_interface = next_interface = acpi_gbl_supported_interfaces; | |
225 | while (next_interface) { | |
226 | if (!ACPI_STRCMP(interface_name, next_interface->name)) { | |
227 | ||
228 | /* Found: name is in either the static list or was added at runtime */ | |
229 | ||
230 | if (next_interface->flags & ACPI_OSI_DYNAMIC) { | |
231 | ||
232 | /* Interface was added dynamically, remove and free it */ | |
233 | ||
234 | if (previous_interface == next_interface) { | |
235 | acpi_gbl_supported_interfaces = | |
236 | next_interface->next; | |
237 | } else { | |
238 | previous_interface->next = | |
239 | next_interface->next; | |
240 | } | |
241 | ||
242 | ACPI_FREE(next_interface->name); | |
243 | ACPI_FREE(next_interface); | |
244 | } else { | |
245 | /* | |
246 | * Interface is in static list. If marked invalid, then it | |
247 | * does not actually exist. Else, mark it invalid. | |
248 | */ | |
249 | if (next_interface->flags & ACPI_OSI_INVALID) { | |
250 | return (AE_NOT_EXIST); | |
251 | } | |
252 | ||
253 | next_interface->flags |= ACPI_OSI_INVALID; | |
254 | } | |
255 | ||
256 | return (AE_OK); | |
257 | } | |
258 | ||
259 | previous_interface = next_interface; | |
260 | next_interface = next_interface->next; | |
261 | } | |
262 | ||
263 | /* Interface was not found */ | |
264 | ||
265 | return (AE_NOT_EXIST); | |
266 | } | |
267 | ||
268 | /******************************************************************************* | |
269 | * | |
270 | * FUNCTION: acpi_ut_get_interface | |
271 | * | |
272 | * PARAMETERS: interface_name - The interface to find | |
273 | * | |
274 | * RETURN: struct acpi_interface_info if found. NULL if not found. | |
275 | * | |
276 | * DESCRIPTION: Search for the specified interface name in the global list. | |
277 | * Caller MUST hold acpi_gbl_osi_mutex | |
278 | * | |
279 | ******************************************************************************/ | |
280 | ||
281 | struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) | |
282 | { | |
283 | struct acpi_interface_info *next_interface; | |
284 | ||
285 | next_interface = acpi_gbl_supported_interfaces; | |
286 | while (next_interface) { | |
287 | if (!ACPI_STRCMP(interface_name, next_interface->name)) { | |
288 | return (next_interface); | |
289 | } | |
290 | ||
291 | next_interface = next_interface->next; | |
292 | } | |
293 | ||
294 | return (NULL); | |
295 | } | |
296 | ||
297 | /******************************************************************************* | |
298 | * | |
299 | * FUNCTION: acpi_ut_osi_implementation | |
300 | * | |
301 | * PARAMETERS: walk_state - Current walk state | |
302 | * | |
303 | * RETURN: Status | |
304 | * | |
305 | * DESCRIPTION: Implementation of the _OSI predefined control method. When | |
306 | * an invocation of _OSI is encountered in the system AML, | |
307 | * control is transferred to this function. | |
308 | * | |
309 | ******************************************************************************/ | |
310 | ||
311 | acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state) | |
312 | { | |
313 | union acpi_operand_object *string_desc; | |
314 | union acpi_operand_object *return_desc; | |
315 | struct acpi_interface_info *interface_info; | |
316 | acpi_interface_handler interface_handler; | |
317 | u32 return_value; | |
318 | ||
319 | ACPI_FUNCTION_TRACE(ut_osi_implementation); | |
320 | ||
321 | /* Validate the string input argument (from the AML caller) */ | |
322 | ||
323 | string_desc = walk_state->arguments[0].object; | |
324 | if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { | |
325 | return_ACPI_STATUS(AE_TYPE); | |
326 | } | |
327 | ||
328 | /* Create a return object */ | |
329 | ||
330 | return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); | |
331 | if (!return_desc) { | |
332 | return_ACPI_STATUS(AE_NO_MEMORY); | |
333 | } | |
334 | ||
335 | /* Default return value is 0, NOT SUPPORTED */ | |
336 | ||
337 | return_value = 0; | |
338 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
339 | ||
340 | /* Lookup the interface in the global _OSI list */ | |
341 | ||
342 | interface_info = acpi_ut_get_interface(string_desc->string.pointer); | |
343 | if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { | |
344 | /* | |
345 | * The interface is supported. | |
346 | * Update the osi_data if necessary. We keep track of the latest | |
347 | * version of Windows that has been requested by the BIOS. | |
348 | */ | |
349 | if (interface_info->value > acpi_gbl_osi_data) { | |
350 | acpi_gbl_osi_data = interface_info->value; | |
351 | } | |
352 | ||
353 | return_value = ACPI_UINT32_MAX; | |
354 | } | |
355 | ||
356 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
357 | ||
358 | /* | |
359 | * Invoke an optional _OSI interface handler. The host OS may wish | |
360 | * to do some interface-specific handling. For example, warn about | |
361 | * certain interfaces or override the true/false support value. | |
362 | */ | |
363 | interface_handler = acpi_gbl_interface_handler; | |
364 | if (interface_handler) { | |
365 | return_value = | |
366 | interface_handler(string_desc->string.pointer, | |
367 | return_value); | |
368 | } | |
369 | ||
370 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
371 | "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", | |
372 | string_desc->string.pointer, | |
373 | return_value == 0 ? "not " : "")); | |
374 | ||
375 | /* Complete the return object */ | |
376 | ||
377 | return_desc->integer.value = return_value; | |
378 | walk_state->return_desc = return_desc; | |
379 | return_ACPI_STATUS(AE_OK); | |
380 | } |