1 /****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2012, 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, 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 } 382