1 /****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2013, Intel Corp. 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 */ 74 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 75 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 76 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 77 78 /* Feature Group Strings */ 79 80 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 81 82 /* 83 * All "optional" feature group strings (features that are implemented 84 * by the host) should be dynamically modified to VALID by the host via 85 * acpi_install_interface or acpi_update_interfaces. Such optional feature 86 * group strings are set as INVALID by default here. 87 */ 88 89 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 90 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 91 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 92 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 93 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 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 acpi_status status; 111 u32 i; 112 113 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 114 if (ACPI_FAILURE(status)) { 115 return (status); 116 } 117 118 acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; 119 120 /* Link the static list of supported interfaces */ 121 122 for (i = 0; 123 i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); 124 i++) { 125 acpi_default_supported_interfaces[i].next = 126 &acpi_default_supported_interfaces[(acpi_size) i + 1]; 127 } 128 129 acpi_os_release_mutex(acpi_gbl_osi_mutex); 130 return (AE_OK); 131 } 132 133 /******************************************************************************* 134 * 135 * FUNCTION: acpi_ut_interface_terminate 136 * 137 * PARAMETERS: None 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Delete all interfaces in the global list. Sets 142 * acpi_gbl_supported_interfaces to NULL. 143 * 144 ******************************************************************************/ 145 146 acpi_status acpi_ut_interface_terminate(void) 147 { 148 acpi_status status; 149 struct acpi_interface_info *next_interface; 150 151 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 152 if (ACPI_FAILURE(status)) { 153 return (status); 154 } 155 156 next_interface = acpi_gbl_supported_interfaces; 157 while (next_interface) { 158 acpi_gbl_supported_interfaces = next_interface->next; 159 160 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 161 162 /* Only interfaces added at runtime can be freed */ 163 164 ACPI_FREE(next_interface->name); 165 ACPI_FREE(next_interface); 166 } else { 167 /* Interface is in static list. Reset it to invalid or valid. */ 168 169 if (next_interface->flags & ACPI_OSI_DEFAULT_INVALID) { 170 next_interface->flags |= ACPI_OSI_INVALID; 171 } else { 172 next_interface->flags &= ~ACPI_OSI_INVALID; 173 } 174 } 175 176 next_interface = acpi_gbl_supported_interfaces; 177 } 178 179 acpi_os_release_mutex(acpi_gbl_osi_mutex); 180 return (AE_OK); 181 } 182 183 /******************************************************************************* 184 * 185 * FUNCTION: acpi_ut_install_interface 186 * 187 * PARAMETERS: interface_name - The interface to install 188 * 189 * RETURN: Status 190 * 191 * DESCRIPTION: Install the interface into the global interface list. 192 * Caller MUST hold acpi_gbl_osi_mutex 193 * 194 ******************************************************************************/ 195 196 acpi_status acpi_ut_install_interface(acpi_string interface_name) 197 { 198 struct acpi_interface_info *interface_info; 199 200 /* Allocate info block and space for the name string */ 201 202 interface_info = 203 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); 204 if (!interface_info) { 205 return (AE_NO_MEMORY); 206 } 207 208 interface_info->name = 209 ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1); 210 if (!interface_info->name) { 211 ACPI_FREE(interface_info); 212 return (AE_NO_MEMORY); 213 } 214 215 /* Initialize new info and insert at the head of the global list */ 216 217 ACPI_STRCPY(interface_info->name, interface_name); 218 interface_info->flags = ACPI_OSI_DYNAMIC; 219 interface_info->next = acpi_gbl_supported_interfaces; 220 221 acpi_gbl_supported_interfaces = interface_info; 222 return (AE_OK); 223 } 224 225 /******************************************************************************* 226 * 227 * FUNCTION: acpi_ut_remove_interface 228 * 229 * PARAMETERS: interface_name - The interface to remove 230 * 231 * RETURN: Status 232 * 233 * DESCRIPTION: Remove the interface from the global interface list. 234 * Caller MUST hold acpi_gbl_osi_mutex 235 * 236 ******************************************************************************/ 237 238 acpi_status acpi_ut_remove_interface(acpi_string interface_name) 239 { 240 struct acpi_interface_info *previous_interface; 241 struct acpi_interface_info *next_interface; 242 243 previous_interface = next_interface = acpi_gbl_supported_interfaces; 244 while (next_interface) { 245 if (!ACPI_STRCMP(interface_name, next_interface->name)) { 246 247 /* Found: name is in either the static list or was added at runtime */ 248 249 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 250 251 /* Interface was added dynamically, remove and free it */ 252 253 if (previous_interface == next_interface) { 254 acpi_gbl_supported_interfaces = 255 next_interface->next; 256 } else { 257 previous_interface->next = 258 next_interface->next; 259 } 260 261 ACPI_FREE(next_interface->name); 262 ACPI_FREE(next_interface); 263 } else { 264 /* 265 * Interface is in static list. If marked invalid, then it 266 * does not actually exist. Else, mark it invalid. 267 */ 268 if (next_interface->flags & ACPI_OSI_INVALID) { 269 return (AE_NOT_EXIST); 270 } 271 272 next_interface->flags |= ACPI_OSI_INVALID; 273 } 274 275 return (AE_OK); 276 } 277 278 previous_interface = next_interface; 279 next_interface = next_interface->next; 280 } 281 282 /* Interface was not found */ 283 284 return (AE_NOT_EXIST); 285 } 286 287 /******************************************************************************* 288 * 289 * FUNCTION: acpi_ut_update_interfaces 290 * 291 * PARAMETERS: action - Actions to be performed during the 292 * update 293 * 294 * RETURN: Status 295 * 296 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 297 * strings or/and feature group strings. 298 * Caller MUST hold acpi_gbl_osi_mutex 299 * 300 ******************************************************************************/ 301 302 acpi_status acpi_ut_update_interfaces(u8 action) 303 { 304 struct acpi_interface_info *next_interface; 305 306 next_interface = acpi_gbl_supported_interfaces; 307 while (next_interface) { 308 if (((next_interface->flags & ACPI_OSI_FEATURE) && 309 (action & ACPI_FEATURE_STRINGS)) || 310 (!(next_interface->flags & ACPI_OSI_FEATURE) && 311 (action & ACPI_VENDOR_STRINGS))) { 312 if (action & ACPI_DISABLE_INTERFACES) { 313 314 /* Mark the interfaces as invalid */ 315 316 next_interface->flags |= ACPI_OSI_INVALID; 317 } else { 318 /* Mark the interfaces as valid */ 319 320 next_interface->flags &= ~ACPI_OSI_INVALID; 321 } 322 } 323 324 next_interface = next_interface->next; 325 } 326 327 return (AE_OK); 328 } 329 330 /******************************************************************************* 331 * 332 * FUNCTION: acpi_ut_get_interface 333 * 334 * PARAMETERS: interface_name - The interface to find 335 * 336 * RETURN: struct acpi_interface_info if found. NULL if not found. 337 * 338 * DESCRIPTION: Search for the specified interface name in the global list. 339 * Caller MUST hold acpi_gbl_osi_mutex 340 * 341 ******************************************************************************/ 342 343 struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) 344 { 345 struct acpi_interface_info *next_interface; 346 347 next_interface = acpi_gbl_supported_interfaces; 348 while (next_interface) { 349 if (!ACPI_STRCMP(interface_name, next_interface->name)) { 350 return (next_interface); 351 } 352 353 next_interface = next_interface->next; 354 } 355 356 return (NULL); 357 } 358 359 /******************************************************************************* 360 * 361 * FUNCTION: acpi_ut_osi_implementation 362 * 363 * PARAMETERS: walk_state - Current walk state 364 * 365 * RETURN: Status 366 * 367 * DESCRIPTION: Implementation of the _OSI predefined control method. When 368 * an invocation of _OSI is encountered in the system AML, 369 * control is transferred to this function. 370 * 371 ******************************************************************************/ 372 373 acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state) 374 { 375 union acpi_operand_object *string_desc; 376 union acpi_operand_object *return_desc; 377 struct acpi_interface_info *interface_info; 378 acpi_interface_handler interface_handler; 379 acpi_status status; 380 u32 return_value; 381 382 ACPI_FUNCTION_TRACE(ut_osi_implementation); 383 384 /* Validate the string input argument (from the AML caller) */ 385 386 string_desc = walk_state->arguments[0].object; 387 if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { 388 return_ACPI_STATUS(AE_TYPE); 389 } 390 391 /* Create a return object */ 392 393 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); 394 if (!return_desc) { 395 return_ACPI_STATUS(AE_NO_MEMORY); 396 } 397 398 /* Default return value is 0, NOT SUPPORTED */ 399 400 return_value = 0; 401 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 402 if (ACPI_FAILURE(status)) { 403 acpi_ut_remove_reference(return_desc); 404 return_ACPI_STATUS(status); 405 } 406 407 /* Lookup the interface in the global _OSI list */ 408 409 interface_info = acpi_ut_get_interface(string_desc->string.pointer); 410 if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { 411 /* 412 * The interface is supported. 413 * Update the osi_data if necessary. We keep track of the latest 414 * version of Windows that has been requested by the BIOS. 415 */ 416 if (interface_info->value > acpi_gbl_osi_data) { 417 acpi_gbl_osi_data = interface_info->value; 418 } 419 420 return_value = ACPI_UINT32_MAX; 421 } 422 423 acpi_os_release_mutex(acpi_gbl_osi_mutex); 424 425 /* 426 * Invoke an optional _OSI interface handler. The host OS may wish 427 * to do some interface-specific handling. For example, warn about 428 * certain interfaces or override the true/false support value. 429 */ 430 interface_handler = acpi_gbl_interface_handler; 431 if (interface_handler) { 432 return_value = 433 interface_handler(string_desc->string.pointer, 434 return_value); 435 } 436 437 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, 438 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 439 string_desc->string.pointer, 440 return_value == 0 ? "not " : "")); 441 442 /* Complete the return object */ 443 444 return_desc->integer.value = return_value; 445 walk_state->return_desc = return_desc; 446 return_ACPI_STATUS(AE_OK); 447 } 448