1 /******************************************************************************* 2 * 3 * Module Name: utmutex - local mutex support 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2020, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 155 #define _COMPONENT ACPI_UTILITIES 156 ACPI_MODULE_NAME ("utmutex") 157 158 /* Local prototypes */ 159 160 static ACPI_STATUS 161 AcpiUtCreateMutex ( 162 ACPI_MUTEX_HANDLE MutexId); 163 164 static void 165 AcpiUtDeleteMutex ( 166 ACPI_MUTEX_HANDLE MutexId); 167 168 169 /******************************************************************************* 170 * 171 * FUNCTION: AcpiUtMutexInitialize 172 * 173 * PARAMETERS: None. 174 * 175 * RETURN: Status 176 * 177 * DESCRIPTION: Create the system mutex objects. This includes mutexes, 178 * spin locks, and reader/writer locks. 179 * 180 ******************************************************************************/ 181 182 ACPI_STATUS 183 AcpiUtMutexInitialize ( 184 void) 185 { 186 UINT32 i; 187 ACPI_STATUS Status; 188 189 190 ACPI_FUNCTION_TRACE (UtMutexInitialize); 191 192 193 /* Create each of the predefined mutex objects */ 194 195 for (i = 0; i < ACPI_NUM_MUTEX; i++) 196 { 197 Status = AcpiUtCreateMutex (i); 198 if (ACPI_FAILURE (Status)) 199 { 200 return_ACPI_STATUS (Status); 201 } 202 } 203 204 /* Create the spinlocks for use at interrupt level or for speed */ 205 206 Status = AcpiOsCreateLock (&AcpiGbl_GpeLock); 207 if (ACPI_FAILURE (Status)) 208 { 209 return_ACPI_STATUS (Status); 210 } 211 212 Status = AcpiOsCreateLock (&AcpiGbl_HardwareLock); 213 if (ACPI_FAILURE (Status)) 214 { 215 return_ACPI_STATUS (Status); 216 } 217 218 Status = AcpiOsCreateLock (&AcpiGbl_ReferenceCountLock); 219 if (ACPI_FAILURE (Status)) 220 { 221 return_ACPI_STATUS (Status); 222 } 223 224 /* Mutex for _OSI support */ 225 226 Status = AcpiOsCreateMutex (&AcpiGbl_OsiMutex); 227 if (ACPI_FAILURE (Status)) 228 { 229 return_ACPI_STATUS (Status); 230 } 231 232 /* Create the reader/writer lock for namespace access */ 233 234 Status = AcpiUtCreateRwLock (&AcpiGbl_NamespaceRwLock); 235 if (ACPI_FAILURE (Status)) 236 { 237 return_ACPI_STATUS (Status); 238 } 239 240 return_ACPI_STATUS (Status); 241 } 242 243 244 /******************************************************************************* 245 * 246 * FUNCTION: AcpiUtMutexTerminate 247 * 248 * PARAMETERS: None. 249 * 250 * RETURN: None. 251 * 252 * DESCRIPTION: Delete all of the system mutex objects. This includes mutexes, 253 * spin locks, and reader/writer locks. 254 * 255 ******************************************************************************/ 256 257 void 258 AcpiUtMutexTerminate ( 259 void) 260 { 261 UINT32 i; 262 263 264 ACPI_FUNCTION_TRACE (UtMutexTerminate); 265 266 267 /* Delete each predefined mutex object */ 268 269 for (i = 0; i < ACPI_NUM_MUTEX; i++) 270 { 271 AcpiUtDeleteMutex (i); 272 } 273 274 AcpiOsDeleteMutex (AcpiGbl_OsiMutex); 275 276 /* Delete the spinlocks */ 277 278 AcpiOsDeleteLock (AcpiGbl_GpeLock); 279 AcpiOsDeleteLock (AcpiGbl_HardwareLock); 280 AcpiOsDeleteLock (AcpiGbl_ReferenceCountLock); 281 282 /* Delete the reader/writer lock */ 283 284 AcpiUtDeleteRwLock (&AcpiGbl_NamespaceRwLock); 285 return_VOID; 286 } 287 288 289 /******************************************************************************* 290 * 291 * FUNCTION: AcpiUtCreateMutex 292 * 293 * PARAMETERS: MutexID - ID of the mutex to be created 294 * 295 * RETURN: Status 296 * 297 * DESCRIPTION: Create a mutex object. 298 * 299 ******************************************************************************/ 300 301 static ACPI_STATUS 302 AcpiUtCreateMutex ( 303 ACPI_MUTEX_HANDLE MutexId) 304 { 305 ACPI_STATUS Status = AE_OK; 306 307 308 ACPI_FUNCTION_TRACE_U32 (UtCreateMutex, MutexId); 309 310 311 if (!AcpiGbl_MutexInfo[MutexId].Mutex) 312 { 313 Status = AcpiOsCreateMutex (&AcpiGbl_MutexInfo[MutexId].Mutex); 314 AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; 315 AcpiGbl_MutexInfo[MutexId].UseCount = 0; 316 } 317 318 return_ACPI_STATUS (Status); 319 } 320 321 322 /******************************************************************************* 323 * 324 * FUNCTION: AcpiUtDeleteMutex 325 * 326 * PARAMETERS: MutexID - ID of the mutex to be deleted 327 * 328 * RETURN: Status 329 * 330 * DESCRIPTION: Delete a mutex object. 331 * 332 ******************************************************************************/ 333 334 static void 335 AcpiUtDeleteMutex ( 336 ACPI_MUTEX_HANDLE MutexId) 337 { 338 339 ACPI_FUNCTION_TRACE_U32 (UtDeleteMutex, MutexId); 340 341 342 AcpiOsDeleteMutex (AcpiGbl_MutexInfo[MutexId].Mutex); 343 344 AcpiGbl_MutexInfo[MutexId].Mutex = NULL; 345 AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; 346 347 return_VOID; 348 } 349 350 351 /******************************************************************************* 352 * 353 * FUNCTION: AcpiUtAcquireMutex 354 * 355 * PARAMETERS: MutexID - ID of the mutex to be acquired 356 * 357 * RETURN: Status 358 * 359 * DESCRIPTION: Acquire a mutex object. 360 * 361 ******************************************************************************/ 362 363 ACPI_STATUS 364 AcpiUtAcquireMutex ( 365 ACPI_MUTEX_HANDLE MutexId) 366 { 367 ACPI_STATUS Status; 368 ACPI_THREAD_ID ThisThreadId; 369 370 371 ACPI_FUNCTION_NAME (UtAcquireMutex); 372 373 374 if (MutexId > ACPI_MAX_MUTEX) 375 { 376 return (AE_BAD_PARAMETER); 377 } 378 379 ThisThreadId = AcpiOsGetThreadId (); 380 381 #ifdef ACPI_MUTEX_DEBUG 382 { 383 UINT32 i; 384 /* 385 * Mutex debug code, for internal debugging only. 386 * 387 * Deadlock prevention. Check if this thread owns any mutexes of value 388 * greater than or equal to this one. If so, the thread has violated 389 * the mutex ordering rule. This indicates a coding error somewhere in 390 * the ACPI subsystem code. 391 */ 392 for (i = MutexId; i < ACPI_NUM_MUTEX; i++) 393 { 394 if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId) 395 { 396 if (i == MutexId) 397 { 398 ACPI_ERROR ((AE_INFO, 399 "Mutex [%s] already acquired by this thread [%u]", 400 AcpiUtGetMutexName (MutexId), 401 (UINT32) ThisThreadId)); 402 403 return (AE_ALREADY_ACQUIRED); 404 } 405 406 ACPI_ERROR ((AE_INFO, 407 "Invalid acquire order: Thread %u owns [%s], wants [%s]", 408 (UINT32) ThisThreadId, AcpiUtGetMutexName (i), 409 AcpiUtGetMutexName (MutexId))); 410 411 return (AE_ACQUIRE_DEADLOCK); 412 } 413 } 414 } 415 #endif 416 417 ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, 418 "Thread %u attempting to acquire Mutex [%s]\n", 419 (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); 420 421 Status = AcpiOsAcquireMutex ( 422 AcpiGbl_MutexInfo[MutexId].Mutex, ACPI_WAIT_FOREVER); 423 if (ACPI_SUCCESS (Status)) 424 { 425 ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, 426 "Thread %u acquired Mutex [%s]\n", 427 (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); 428 429 AcpiGbl_MutexInfo[MutexId].UseCount++; 430 AcpiGbl_MutexInfo[MutexId].ThreadId = ThisThreadId; 431 } 432 else 433 { 434 ACPI_EXCEPTION ((AE_INFO, Status, 435 "Thread %u could not acquire Mutex [%s] (0x%X)", 436 (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId), MutexId)); 437 } 438 439 return (Status); 440 } 441 442 443 /******************************************************************************* 444 * 445 * FUNCTION: AcpiUtReleaseMutex 446 * 447 * PARAMETERS: MutexID - ID of the mutex to be released 448 * 449 * RETURN: Status 450 * 451 * DESCRIPTION: Release a mutex object. 452 * 453 ******************************************************************************/ 454 455 ACPI_STATUS 456 AcpiUtReleaseMutex ( 457 ACPI_MUTEX_HANDLE MutexId) 458 { 459 ACPI_FUNCTION_NAME (UtReleaseMutex); 460 461 462 ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u releasing Mutex [%s]\n", 463 (UINT32) AcpiOsGetThreadId (), AcpiUtGetMutexName (MutexId))); 464 465 if (MutexId > ACPI_MAX_MUTEX) 466 { 467 return (AE_BAD_PARAMETER); 468 } 469 470 /* 471 * Mutex must be acquired in order to release it! 472 */ 473 if (AcpiGbl_MutexInfo[MutexId].ThreadId == ACPI_MUTEX_NOT_ACQUIRED) 474 { 475 ACPI_ERROR ((AE_INFO, 476 "Mutex [%s] (0x%X) is not acquired, cannot release", 477 AcpiUtGetMutexName (MutexId), MutexId)); 478 479 return (AE_NOT_ACQUIRED); 480 } 481 482 #ifdef ACPI_MUTEX_DEBUG 483 { 484 UINT32 i; 485 /* 486 * Mutex debug code, for internal debugging only. 487 * 488 * Deadlock prevention. Check if this thread owns any mutexes of value 489 * greater than this one. If so, the thread has violated the mutex 490 * ordering rule. This indicates a coding error somewhere in 491 * the ACPI subsystem code. 492 */ 493 for (i = MutexId; i < ACPI_NUM_MUTEX; i++) 494 { 495 if (AcpiGbl_MutexInfo[i].ThreadId == AcpiOsGetThreadId ()) 496 { 497 if (i == MutexId) 498 { 499 continue; 500 } 501 502 ACPI_ERROR ((AE_INFO, 503 "Invalid release order: owns [%s], releasing [%s]", 504 AcpiUtGetMutexName (i), AcpiUtGetMutexName (MutexId))); 505 506 return (AE_RELEASE_DEADLOCK); 507 } 508 } 509 } 510 #endif 511 512 /* Mark unlocked FIRST */ 513 514 AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; 515 516 AcpiOsReleaseMutex (AcpiGbl_MutexInfo[MutexId].Mutex); 517 return (AE_OK); 518 } 519