1/****************************************************************************** 2 * 3 * Module Name: evmisc - ACPI device notification handler dispatch 4 * and ACPI Global Lock support
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5 * $Revision: 31 $
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5 * $Revision: 32 $ |
6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#include "acpi.h" 119#include "acevents.h" 120#include "acnamesp.h" 121#include "acinterp.h" 122#include "achware.h" 123 124#define _COMPONENT ACPI_EVENTS 125 MODULE_NAME ("evmisc") 126 127 128/******************************************************************************* 129 * 130 * FUNCTION: AcpiEvQueueNotifyRequest 131 * 132 * PARAMETERS: 133 * 134 * RETURN: None. 135 * 136 * DESCRIPTION: Dispatch a device notification event to a previously 137 * installed handler. 138 * 139 ******************************************************************************/ 140 141ACPI_STATUS 142AcpiEvQueueNotifyRequest ( 143 ACPI_NAMESPACE_NODE *Node, 144 UINT32 NotifyValue) 145{ 146 ACPI_OPERAND_OBJECT *ObjDesc; 147 ACPI_OPERAND_OBJECT *HandlerObj = NULL; 148 ACPI_GENERIC_STATE *NotifyInfo; 149 ACPI_STATUS Status = AE_OK; 150 151 152 PROC_NAME ("EvQueueNotifyRequest"); 153 154 155 /* 156 * For value 1 (Ejection Request), some device method may need to be run. 157 * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run. 158 * For value 0x80 (Status Change) on the power button or sleep button, 159 * initiate soft-off or sleep operation? 160 */ 161
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162 DEBUG_PRINTP (ACPI_INFO,
163 ("Dispatching Notify(%X) on node %p\n", NotifyValue, Node));
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162 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 163 "Dispatching Notify(%X) on node %p\n", NotifyValue, Node)); |
164 165 switch (NotifyValue) 166 { 167 case 0:
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168 DEBUG_PRINTP (ACPI_INFO, ("Notify value: Re-enumerate Devices\n"));
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168 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Re-enumerate Devices\n")); |
169 break; 170 171 case 1:
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172 DEBUG_PRINTP (ACPI_INFO, ("Notify value: Ejection Request\n"));
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172 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Ejection Request\n")); |
173 break; 174 175 case 2:
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176 DEBUG_PRINTP (ACPI_INFO, ("Notify value: Device Wake\n"));
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176 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Device Wake\n")); |
177 break; 178 179 case 0x80:
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180 DEBUG_PRINTP (ACPI_INFO, ("Notify value: Status Change\n"));
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180 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Status Change\n")); |
181 break; 182 183 default:
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184 DEBUG_PRINTP (ACPI_INFO, ("Unknown Notify Value: %lx \n", NotifyValue));
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184 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Unknown Notify Value: %lx \n", NotifyValue)); |
185 break; 186 } 187 188 189 /* 190 * Get the notify object attached to the device Node 191 */ 192 193 ObjDesc = AcpiNsGetAttachedObject (Node); 194 if (ObjDesc) 195 { 196 197 /* We have the notify object, Get the right handler */ 198 199 switch (Node->Type) 200 { 201 case ACPI_TYPE_DEVICE: 202 if (NotifyValue <= MAX_SYS_NOTIFY) 203 { 204 HandlerObj = ObjDesc->Device.SysHandler; 205 } 206 else 207 { 208 HandlerObj = ObjDesc->Device.DrvHandler; 209 } 210 break; 211 212 case ACPI_TYPE_THERMAL: 213 if (NotifyValue <= MAX_SYS_NOTIFY) 214 { 215 HandlerObj = ObjDesc->ThermalZone.SysHandler; 216 } 217 else 218 { 219 HandlerObj = ObjDesc->ThermalZone.DrvHandler; 220 } 221 break; 222 } 223 } 224 225 226 /* If there is any handler to run, schedule the dispatcher */ 227 228 if ((AcpiGbl_SysNotify.Handler && (NotifyValue <= MAX_SYS_NOTIFY)) || 229 (AcpiGbl_DrvNotify.Handler && (NotifyValue > MAX_SYS_NOTIFY)) || 230 HandlerObj) 231 { 232 233 NotifyInfo = AcpiUtCreateGenericState (); 234 if (!NotifyInfo) 235 { 236 return (AE_NO_MEMORY); 237 } 238 239 NotifyInfo->Notify.Node = Node; 240 NotifyInfo->Notify.Value = (UINT16) NotifyValue; 241 NotifyInfo->Notify.HandlerObj = HandlerObj; 242 243 Status = AcpiOsQueueForExecution (OSD_PRIORITY_HIGH, 244 AcpiEvNotifyDispatch, NotifyInfo); 245 if (ACPI_FAILURE (Status)) 246 { 247 AcpiUtDeleteGenericState (NotifyInfo); 248 } 249 } 250 251 if (!HandlerObj) 252 { 253 /* There is no per-device notify handler for this device */ 254
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255 DEBUG_PRINTP (ACPI_INFO, ("No notify handler for node %p \n", Node));
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255 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "No notify handler for node %p \n", Node)); |
256 } 257 258 return (Status); 259} 260 261 262/******************************************************************************* 263 * 264 * FUNCTION: AcpiEvNotifyDispatch 265 * 266 * PARAMETERS: 267 * 268 * RETURN: None. 269 * 270 * DESCRIPTION: Dispatch a device notification event to a previously 271 * installed handler. 272 * 273 ******************************************************************************/ 274 275void 276AcpiEvNotifyDispatch ( 277 void *Context) 278{ 279 ACPI_GENERIC_STATE *NotifyInfo = (ACPI_GENERIC_STATE *) Context; 280 ACPI_NOTIFY_HANDLER GlobalHandler = NULL; 281 void *GlobalContext = NULL; 282 ACPI_OPERAND_OBJECT *HandlerObj; 283 284 285 /* 286 * We will invoke a global notify handler if installed. 287 * This is done _before_ we invoke the per-device handler attached to the device. 288 */ 289 290 if (NotifyInfo->Notify.Value <= MAX_SYS_NOTIFY) 291 { 292 /* Global system notification handler */ 293 294 if (AcpiGbl_SysNotify.Handler) 295 { 296 GlobalHandler = AcpiGbl_SysNotify.Handler; 297 GlobalContext = AcpiGbl_SysNotify.Context; 298 } 299 } 300 301 else 302 { 303 /* Global driver notification handler */ 304 305 if (AcpiGbl_DrvNotify.Handler) 306 { 307 GlobalHandler = AcpiGbl_DrvNotify.Handler; 308 GlobalContext = AcpiGbl_DrvNotify.Context; 309 } 310 } 311 312 313 /* Invoke the system handler first, if present */ 314 315 if (GlobalHandler) 316 { 317 GlobalHandler (NotifyInfo->Notify.Node, NotifyInfo->Notify.Value, GlobalContext); 318 } 319 320 /* Now invoke the per-device handler, if present */ 321 322 HandlerObj = NotifyInfo->Notify.HandlerObj; 323 if (HandlerObj) 324 { 325 HandlerObj->NotifyHandler.Handler (NotifyInfo->Notify.Node, NotifyInfo->Notify.Value, 326 HandlerObj->NotifyHandler.Context); 327 } 328 329 330 /* All done with the info object */ 331 332 AcpiUtDeleteGenericState (NotifyInfo); 333} 334 335 336/******************************************************************************* 337 * 338 * FUNCTION: AcpiEvGlobalLockThread 339 * 340 * RETURN: None 341 * 342 * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the 343 * Global Lock. Simply signal all threads that are waiting 344 * for the lock. 345 * 346 ******************************************************************************/ 347 348static void 349AcpiEvGlobalLockThread ( 350 void *Context) 351{ 352 353 /* Signal threads that are waiting for the lock */ 354 355 if (AcpiGbl_GlobalLockThreadCount) 356 { 357 /* Send sufficient units to the semaphore */ 358 359 AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, 360 AcpiGbl_GlobalLockThreadCount); 361 } 362} 363 364 365/******************************************************************************* 366 * 367 * FUNCTION: AcpiEvGlobalLockHandler 368 * 369 * RETURN: Status 370 * 371 * DESCRIPTION: Invoked directly from the SCI handler when a global lock 372 * release interrupt occurs. Grab the global lock and queue 373 * the global lock thread for execution 374 * 375 ******************************************************************************/ 376 377static UINT32 378AcpiEvGlobalLockHandler ( 379 void *Context) 380{ 381 BOOLEAN Acquired = FALSE; 382 void *GlobalLock; 383 384 385 /* 386 * Attempt to get the lock 387 * If we don't get it now, it will be marked pending and we will 388 * take another interrupt when it becomes free. 389 */ 390 391 GlobalLock = AcpiGbl_FACS->GlobalLock; 392 ACPI_ACQUIRE_GLOBAL_LOCK (GlobalLock, Acquired); 393 if (Acquired) 394 { 395 /* Got the lock, now wake all threads waiting for it */ 396 397 AcpiGbl_GlobalLockAcquired = TRUE; 398 399 /* Run the Global Lock thread which will signal all waiting threads */ 400 401 AcpiOsQueueForExecution (OSD_PRIORITY_HIGH, AcpiEvGlobalLockThread, 402 Context); 403 } 404 405 return (INTERRUPT_HANDLED); 406} 407 408 409/******************************************************************************* 410 * 411 * FUNCTION: AcpiEvInitGlobalLockHandler 412 * 413 * RETURN: Status 414 * 415 * DESCRIPTION: Install a handler for the global lock release event 416 * 417 ******************************************************************************/ 418 419ACPI_STATUS 420AcpiEvInitGlobalLockHandler (void) 421{ 422 ACPI_STATUS Status; 423 424 425 FUNCTION_TRACE ("EvInitGlobalLockHandler"); 426 427 428 AcpiGbl_GlobalLockPresent = TRUE; 429 Status = AcpiInstallFixedEventHandler (ACPI_EVENT_GLOBAL, 430 AcpiEvGlobalLockHandler, NULL); 431 432 /* 433 * If the global lock does not exist on this platform, the attempt 434 * to enable GBL_STS will fail (the GBL_EN bit will not stick) 435 * Map to AE_OK, but mark global lock as not present. 436 * Any attempt to actually use the global lock will be flagged 437 * with an error. 438 */ 439 if (Status == AE_NO_HARDWARE_RESPONSE) 440 { 441 AcpiGbl_GlobalLockPresent = FALSE; 442 Status = AE_OK; 443 } 444 445 return_ACPI_STATUS (Status); 446} 447 448 449/****************************************************************************** 450 * 451 * FUNCTION: AcpiEvAcquireGlobalLock 452 * 453 * RETURN: Status 454 * 455 * DESCRIPTION: Attempt to gain ownership of the Global Lock. 456 * 457 *****************************************************************************/ 458 459ACPI_STATUS 460AcpiEvAcquireGlobalLock(void) 461{ 462 ACPI_STATUS Status = AE_OK; 463 BOOLEAN Acquired = FALSE; 464 void *GlobalLock; 465 466 467 FUNCTION_TRACE ("EvAcquireGlobalLock"); 468 469 /* Make sure that we actually have a global lock */ 470 471 if (!AcpiGbl_GlobalLockPresent) 472 { 473 return_ACPI_STATUS (AE_NO_GLOBAL_LOCK); 474 } 475 476 /* One more thread wants the global lock */ 477 478 AcpiGbl_GlobalLockThreadCount++; 479 480 481 /* If we (OS side) have the hardware lock already, we are done */ 482 483 if (AcpiGbl_GlobalLockAcquired) 484 { 485 return_ACPI_STATUS (AE_OK); 486 } 487 488 /* Only if the FACS is valid */ 489 490 if (!AcpiGbl_FACS) 491 { 492 return_ACPI_STATUS (AE_OK); 493 } 494 495 496 /* We must acquire the actual hardware lock */ 497 498 GlobalLock = AcpiGbl_FACS->GlobalLock; 499 ACPI_ACQUIRE_GLOBAL_LOCK (GlobalLock, Acquired); 500 if (Acquired) 501 { 502 /* We got the lock */ 503
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504 DEBUG_PRINTP (ACPI_INFO, ("Acquired the Global Lock\n"));
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504 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Acquired the Global Lock\n")); |
505 506 AcpiGbl_GlobalLockAcquired = TRUE; 507 return_ACPI_STATUS (AE_OK); 508 } 509 510 511 /* 512 * Did not get the lock. The pending bit was set above, and we must now 513 * wait until we get the global lock released interrupt. 514 */ 515
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516 DEBUG_PRINTP (ACPI_INFO, ("Waiting for the HW Global Lock\n"));
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516 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Waiting for the HW Global Lock\n")); |
517 518 /* 519 * Acquire the global lock semaphore first. 520 * Since this wait will block, we must release the interpreter 521 */ 522 523 Status = AcpiExSystemWaitSemaphore (AcpiGbl_GlobalLockSemaphore, 524 ACPI_UINT32_MAX); 525 return_ACPI_STATUS (Status); 526} 527 528 529/******************************************************************************* 530 * 531 * FUNCTION: AcpiEvReleaseGlobalLock 532 * 533 * DESCRIPTION: Releases ownership of the Global Lock. 534 * 535 ******************************************************************************/ 536 537void 538AcpiEvReleaseGlobalLock (void) 539{ 540 BOOLEAN Pending = FALSE; 541 void *GlobalLock; 542 543 544 FUNCTION_TRACE ("EvReleaseGlobalLock"); 545 546 if (!AcpiGbl_GlobalLockThreadCount) 547 { 548 REPORT_WARNING(("Global Lock has not be acquired, cannot release\n")); 549 return_VOID; 550 } 551 552 /* One fewer thread has the global lock */ 553 554 AcpiGbl_GlobalLockThreadCount--; 555 556 /* Have all threads released the lock? */ 557 558 if (!AcpiGbl_GlobalLockThreadCount) 559 { 560 /* 561 * No more threads holding lock, we can do the actual hardware 562 * release 563 */ 564 565 GlobalLock = AcpiGbl_FACS->GlobalLock; 566 ACPI_RELEASE_GLOBAL_LOCK (GlobalLock, Pending); 567 AcpiGbl_GlobalLockAcquired = FALSE; 568 569 /* 570 * If the pending bit was set, we must write GBL_RLS to the control 571 * register 572 */ 573 if (Pending) 574 { 575 AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, 576 GBL_RLS, 1); 577 } 578 } 579 580 return_VOID; 581}
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