| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evxface - External interfaces for ACPI events |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, 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 | #define EXPORT_ACPI_INTERFACES |
| 45 | |
| 46 | #include "acpi.h" |
| 47 | #include "accommon.h" |
| 48 | #include "acnamesp.h" |
| 49 | #include "acevents.h" |
| 50 | #include "acinterp.h" |
| 51 | |
| 52 | #define _COMPONENT ACPI_EVENTS |
| 53 | ACPI_MODULE_NAME ("evxface" ) |
| 54 | |
| 55 | #if (!ACPI_REDUCED_HARDWARE) |
| 56 | |
| 57 | /* Local prototypes */ |
| 58 | |
| 59 | static ACPI_STATUS |
| 60 | AcpiEvInstallGpeHandler ( |
| 61 | ACPI_HANDLE GpeDevice, |
| 62 | UINT32 GpeNumber, |
| 63 | UINT32 Type, |
| 64 | BOOLEAN IsRawHandler, |
| 65 | ACPI_GPE_HANDLER Address, |
| 66 | void *Context); |
| 67 | |
| 68 | #endif |
| 69 | |
| 70 | |
| 71 | /******************************************************************************* |
| 72 | * |
| 73 | * FUNCTION: AcpiInstallNotifyHandler |
| 74 | * |
| 75 | * PARAMETERS: Device - The device for which notifies will be handled |
| 76 | * HandlerType - The type of handler: |
| 77 | * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) |
| 78 | * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) |
| 79 | * ACPI_ALL_NOTIFY: Both System and Device |
| 80 | * Handler - Address of the handler |
| 81 | * Context - Value passed to the handler on each GPE |
| 82 | * |
| 83 | * RETURN: Status |
| 84 | * |
| 85 | * DESCRIPTION: Install a handler for notifications on an ACPI Device, |
| 86 | * ThermalZone, or Processor object. |
| 87 | * |
| 88 | * NOTES: The Root namespace object may have only one handler for each |
| 89 | * type of notify (System/Device). Device/Thermal/Processor objects |
| 90 | * may have one device notify handler, and multiple system notify |
| 91 | * handlers. |
| 92 | * |
| 93 | ******************************************************************************/ |
| 94 | |
| 95 | ACPI_STATUS |
| 96 | AcpiInstallNotifyHandler ( |
| 97 | ACPI_HANDLE Device, |
| 98 | UINT32 HandlerType, |
| 99 | ACPI_NOTIFY_HANDLER Handler, |
| 100 | void *Context) |
| 101 | { |
| 102 | ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device); |
| 103 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 104 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 105 | ACPI_STATUS Status; |
| 106 | UINT32 i; |
| 107 | |
| 108 | |
| 109 | ACPI_FUNCTION_TRACE (AcpiInstallNotifyHandler); |
| 110 | |
| 111 | |
| 112 | /* Parameter validation */ |
| 113 | |
| 114 | if ((!Device) || (!Handler) || (!HandlerType) || |
| 115 | (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE)) |
| 116 | { |
| 117 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 118 | } |
| 119 | |
| 120 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 121 | if (ACPI_FAILURE (Status)) |
| 122 | { |
| 123 | return_ACPI_STATUS (Status); |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * Root Object: |
| 128 | * Registering a notify handler on the root object indicates that the |
| 129 | * caller wishes to receive notifications for all objects. Note that |
| 130 | * only one global handler can be registered per notify type. |
| 131 | * Ensure that a handler is not already installed. |
| 132 | */ |
| 133 | if (Device == ACPI_ROOT_OBJECT) |
| 134 | { |
| 135 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| 136 | { |
| 137 | if (HandlerType & (i+1)) |
| 138 | { |
| 139 | if (AcpiGbl_GlobalNotify[i].Handler) |
| 140 | { |
| 141 | Status = AE_ALREADY_EXISTS; |
| 142 | goto UnlockAndExit; |
| 143 | } |
| 144 | |
| 145 | AcpiGbl_GlobalNotify[i].Handler = Handler; |
| 146 | AcpiGbl_GlobalNotify[i].Context = Context; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | goto UnlockAndExit; /* Global notify handler installed, all done */ |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * All Other Objects: |
| 155 | * Caller will only receive notifications specific to the target |
| 156 | * object. Note that only certain object types are allowed to |
| 157 | * receive notifications. |
| 158 | */ |
| 159 | |
| 160 | /* Are Notifies allowed on this object? */ |
| 161 | |
| 162 | if (!AcpiEvIsNotifyObject (Node)) |
| 163 | { |
| 164 | Status = AE_TYPE; |
| 165 | goto UnlockAndExit; |
| 166 | } |
| 167 | |
| 168 | /* Check for an existing internal object, might not exist */ |
| 169 | |
| 170 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 171 | if (!ObjDesc) |
| 172 | { |
| 173 | /* Create a new object */ |
| 174 | |
| 175 | ObjDesc = AcpiUtCreateInternalObject (Node->Type); |
| 176 | if (!ObjDesc) |
| 177 | { |
| 178 | Status = AE_NO_MEMORY; |
| 179 | goto UnlockAndExit; |
| 180 | } |
| 181 | |
| 182 | /* Attach new object to the Node, remove local reference */ |
| 183 | |
| 184 | Status = AcpiNsAttachObject (Device, ObjDesc, Node->Type); |
| 185 | AcpiUtRemoveReference (ObjDesc); |
| 186 | if (ACPI_FAILURE (Status)) |
| 187 | { |
| 188 | goto UnlockAndExit; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | /* Ensure that the handler is not already installed in the lists */ |
| 193 | |
| 194 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| 195 | { |
| 196 | if (HandlerType & (i+1)) |
| 197 | { |
| 198 | HandlerObj = ObjDesc->CommonNotify.NotifyList[i]; |
| 199 | while (HandlerObj) |
| 200 | { |
| 201 | if (HandlerObj->Notify.Handler == Handler) |
| 202 | { |
| 203 | Status = AE_ALREADY_EXISTS; |
| 204 | goto UnlockAndExit; |
| 205 | } |
| 206 | |
| 207 | HandlerObj = HandlerObj->Notify.Next[i]; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | /* Create and populate a new notify handler object */ |
| 213 | |
| 214 | HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_NOTIFY); |
| 215 | if (!HandlerObj) |
| 216 | { |
| 217 | Status = AE_NO_MEMORY; |
| 218 | goto UnlockAndExit; |
| 219 | } |
| 220 | |
| 221 | HandlerObj->Notify.Node = Node; |
| 222 | HandlerObj->Notify.HandlerType = HandlerType; |
| 223 | HandlerObj->Notify.Handler = Handler; |
| 224 | HandlerObj->Notify.Context = Context; |
| 225 | |
| 226 | /* Install the handler at the list head(s) */ |
| 227 | |
| 228 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| 229 | { |
| 230 | if (HandlerType & (i+1)) |
| 231 | { |
| 232 | HandlerObj->Notify.Next[i] = |
| 233 | ObjDesc->CommonNotify.NotifyList[i]; |
| 234 | |
| 235 | ObjDesc->CommonNotify.NotifyList[i] = HandlerObj; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /* Add an extra reference if handler was installed in both lists */ |
| 240 | |
| 241 | if (HandlerType == ACPI_ALL_NOTIFY) |
| 242 | { |
| 243 | AcpiUtAddReference (HandlerObj); |
| 244 | } |
| 245 | |
| 246 | |
| 247 | UnlockAndExit: |
| 248 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 249 | return_ACPI_STATUS (Status); |
| 250 | } |
| 251 | |
| 252 | ACPI_EXPORT_SYMBOL (AcpiInstallNotifyHandler) |
| 253 | |
| 254 | |
| 255 | /******************************************************************************* |
| 256 | * |
| 257 | * FUNCTION: AcpiRemoveNotifyHandler |
| 258 | * |
| 259 | * PARAMETERS: Device - The device for which the handler is installed |
| 260 | * HandlerType - The type of handler: |
| 261 | * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) |
| 262 | * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) |
| 263 | * ACPI_ALL_NOTIFY: Both System and Device |
| 264 | * Handler - Address of the handler |
| 265 | * |
| 266 | * RETURN: Status |
| 267 | * |
| 268 | * DESCRIPTION: Remove a handler for notifies on an ACPI device |
| 269 | * |
| 270 | ******************************************************************************/ |
| 271 | |
| 272 | ACPI_STATUS |
| 273 | AcpiRemoveNotifyHandler ( |
| 274 | ACPI_HANDLE Device, |
| 275 | UINT32 HandlerType, |
| 276 | ACPI_NOTIFY_HANDLER Handler) |
| 277 | { |
| 278 | ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device); |
| 279 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 280 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 281 | ACPI_OPERAND_OBJECT *PreviousHandlerObj; |
| 282 | ACPI_STATUS Status = AE_OK; |
| 283 | UINT32 i; |
| 284 | |
| 285 | |
| 286 | ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler); |
| 287 | |
| 288 | |
| 289 | /* Parameter validation */ |
| 290 | |
| 291 | if ((!Device) || (!Handler) || (!HandlerType) || |
| 292 | (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE)) |
| 293 | { |
| 294 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 295 | } |
| 296 | |
| 297 | /* Root Object. Global handlers are removed here */ |
| 298 | |
| 299 | if (Device == ACPI_ROOT_OBJECT) |
| 300 | { |
| 301 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| 302 | { |
| 303 | if (HandlerType & (i+1)) |
| 304 | { |
| 305 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 306 | if (ACPI_FAILURE (Status)) |
| 307 | { |
| 308 | return_ACPI_STATUS (Status); |
| 309 | } |
| 310 | |
| 311 | if (!AcpiGbl_GlobalNotify[i].Handler || |
| 312 | (AcpiGbl_GlobalNotify[i].Handler != Handler)) |
| 313 | { |
| 314 | Status = AE_NOT_EXIST; |
| 315 | goto UnlockAndExit; |
| 316 | } |
| 317 | |
| 318 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 319 | "Removing global notify handler\n" )); |
| 320 | |
| 321 | AcpiGbl_GlobalNotify[i].Handler = NULL; |
| 322 | AcpiGbl_GlobalNotify[i].Context = NULL; |
| 323 | |
| 324 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 325 | |
| 326 | /* Make sure all deferred notify tasks are completed */ |
| 327 | |
| 328 | AcpiOsWaitEventsComplete (); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | return_ACPI_STATUS (AE_OK); |
| 333 | } |
| 334 | |
| 335 | /* All other objects: Are Notifies allowed on this object? */ |
| 336 | |
| 337 | if (!AcpiEvIsNotifyObject (Node)) |
| 338 | { |
| 339 | return_ACPI_STATUS (AE_TYPE); |
| 340 | } |
| 341 | |
| 342 | /* Must have an existing internal object */ |
| 343 | |
| 344 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 345 | if (!ObjDesc) |
| 346 | { |
| 347 | return_ACPI_STATUS (AE_NOT_EXIST); |
| 348 | } |
| 349 | |
| 350 | /* Internal object exists. Find the handler and remove it */ |
| 351 | |
| 352 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| 353 | { |
| 354 | if (HandlerType & (i+1)) |
| 355 | { |
| 356 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 357 | if (ACPI_FAILURE (Status)) |
| 358 | { |
| 359 | return_ACPI_STATUS (Status); |
| 360 | } |
| 361 | |
| 362 | HandlerObj = ObjDesc->CommonNotify.NotifyList[i]; |
| 363 | PreviousHandlerObj = NULL; |
| 364 | |
| 365 | /* Attempt to find the handler in the handler list */ |
| 366 | |
| 367 | while (HandlerObj && |
| 368 | (HandlerObj->Notify.Handler != Handler)) |
| 369 | { |
| 370 | PreviousHandlerObj = HandlerObj; |
| 371 | HandlerObj = HandlerObj->Notify.Next[i]; |
| 372 | } |
| 373 | |
| 374 | if (!HandlerObj) |
| 375 | { |
| 376 | Status = AE_NOT_EXIST; |
| 377 | goto UnlockAndExit; |
| 378 | } |
| 379 | |
| 380 | /* Remove the handler object from the list */ |
| 381 | |
| 382 | if (PreviousHandlerObj) /* Handler is not at the list head */ |
| 383 | { |
| 384 | PreviousHandlerObj->Notify.Next[i] = |
| 385 | HandlerObj->Notify.Next[i]; |
| 386 | } |
| 387 | else /* Handler is at the list head */ |
| 388 | { |
| 389 | ObjDesc->CommonNotify.NotifyList[i] = |
| 390 | HandlerObj->Notify.Next[i]; |
| 391 | } |
| 392 | |
| 393 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 394 | |
| 395 | /* Make sure all deferred notify tasks are completed */ |
| 396 | |
| 397 | AcpiOsWaitEventsComplete (); |
| 398 | AcpiUtRemoveReference (HandlerObj); |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | return_ACPI_STATUS (Status); |
| 403 | |
| 404 | |
| 405 | UnlockAndExit: |
| 406 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 407 | return_ACPI_STATUS (Status); |
| 408 | } |
| 409 | |
| 410 | ACPI_EXPORT_SYMBOL (AcpiRemoveNotifyHandler) |
| 411 | |
| 412 | |
| 413 | /******************************************************************************* |
| 414 | * |
| 415 | * FUNCTION: AcpiInstallExceptionHandler |
| 416 | * |
| 417 | * PARAMETERS: Handler - Pointer to the handler function for the |
| 418 | * event |
| 419 | * |
| 420 | * RETURN: Status |
| 421 | * |
| 422 | * DESCRIPTION: Saves the pointer to the handler function |
| 423 | * |
| 424 | ******************************************************************************/ |
| 425 | |
| 426 | ACPI_STATUS |
| 427 | AcpiInstallExceptionHandler ( |
| 428 | ACPI_EXCEPTION_HANDLER Handler) |
| 429 | { |
| 430 | ACPI_STATUS Status; |
| 431 | |
| 432 | |
| 433 | ACPI_FUNCTION_TRACE (AcpiInstallExceptionHandler); |
| 434 | |
| 435 | |
| 436 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 437 | if (ACPI_FAILURE (Status)) |
| 438 | { |
| 439 | return_ACPI_STATUS (Status); |
| 440 | } |
| 441 | |
| 442 | /* Don't allow two handlers. */ |
| 443 | |
| 444 | if (AcpiGbl_ExceptionHandler) |
| 445 | { |
| 446 | Status = AE_ALREADY_EXISTS; |
| 447 | goto Cleanup; |
| 448 | } |
| 449 | |
| 450 | /* Install the handler */ |
| 451 | |
| 452 | AcpiGbl_ExceptionHandler = Handler; |
| 453 | |
| 454 | Cleanup: |
| 455 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 456 | return_ACPI_STATUS (Status); |
| 457 | } |
| 458 | |
| 459 | ACPI_EXPORT_SYMBOL (AcpiInstallExceptionHandler) |
| 460 | |
| 461 | |
| 462 | #if (!ACPI_REDUCED_HARDWARE) |
| 463 | /******************************************************************************* |
| 464 | * |
| 465 | * FUNCTION: AcpiInstallSciHandler |
| 466 | * |
| 467 | * PARAMETERS: Address - Address of the handler |
| 468 | * Context - Value passed to the handler on each SCI |
| 469 | * |
| 470 | * RETURN: Status |
| 471 | * |
| 472 | * DESCRIPTION: Install a handler for a System Control Interrupt. |
| 473 | * |
| 474 | ******************************************************************************/ |
| 475 | |
| 476 | ACPI_STATUS |
| 477 | AcpiInstallSciHandler ( |
| 478 | ACPI_SCI_HANDLER Address, |
| 479 | void *Context) |
| 480 | { |
| 481 | ACPI_SCI_HANDLER_INFO *NewSciHandler; |
| 482 | ACPI_SCI_HANDLER_INFO *SciHandler; |
| 483 | ACPI_CPU_FLAGS Flags; |
| 484 | ACPI_STATUS Status; |
| 485 | |
| 486 | |
| 487 | ACPI_FUNCTION_TRACE (AcpiInstallSciHandler); |
| 488 | |
| 489 | |
| 490 | if (!Address) |
| 491 | { |
| 492 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 493 | } |
| 494 | |
| 495 | /* Allocate and init a handler object */ |
| 496 | |
| 497 | NewSciHandler = ACPI_ALLOCATE (sizeof (ACPI_SCI_HANDLER_INFO)); |
| 498 | if (!NewSciHandler) |
| 499 | { |
| 500 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 501 | } |
| 502 | |
| 503 | NewSciHandler->Address = Address; |
| 504 | NewSciHandler->Context = Context; |
| 505 | |
| 506 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 507 | if (ACPI_FAILURE (Status)) |
| 508 | { |
| 509 | goto Exit; |
| 510 | } |
| 511 | |
| 512 | /* Lock list during installation */ |
| 513 | |
| 514 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 515 | SciHandler = AcpiGbl_SciHandlerList; |
| 516 | |
| 517 | /* Ensure handler does not already exist */ |
| 518 | |
| 519 | while (SciHandler) |
| 520 | { |
| 521 | if (Address == SciHandler->Address) |
| 522 | { |
| 523 | Status = AE_ALREADY_EXISTS; |
| 524 | goto UnlockAndExit; |
| 525 | } |
| 526 | |
| 527 | SciHandler = SciHandler->Next; |
| 528 | } |
| 529 | |
| 530 | /* Install the new handler into the global list (at head) */ |
| 531 | |
| 532 | NewSciHandler->Next = AcpiGbl_SciHandlerList; |
| 533 | AcpiGbl_SciHandlerList = NewSciHandler; |
| 534 | |
| 535 | |
| 536 | UnlockAndExit: |
| 537 | |
| 538 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 539 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 540 | |
| 541 | Exit: |
| 542 | if (ACPI_FAILURE (Status)) |
| 543 | { |
| 544 | ACPI_FREE (NewSciHandler); |
| 545 | } |
| 546 | return_ACPI_STATUS (Status); |
| 547 | } |
| 548 | |
| 549 | ACPI_EXPORT_SYMBOL (AcpiInstallSciHandler) |
| 550 | |
| 551 | |
| 552 | /******************************************************************************* |
| 553 | * |
| 554 | * FUNCTION: AcpiRemoveSciHandler |
| 555 | * |
| 556 | * PARAMETERS: Address - Address of the handler |
| 557 | * |
| 558 | * RETURN: Status |
| 559 | * |
| 560 | * DESCRIPTION: Remove a handler for a System Control Interrupt. |
| 561 | * |
| 562 | ******************************************************************************/ |
| 563 | |
| 564 | ACPI_STATUS |
| 565 | AcpiRemoveSciHandler ( |
| 566 | ACPI_SCI_HANDLER Address) |
| 567 | { |
| 568 | ACPI_SCI_HANDLER_INFO *PrevSciHandler; |
| 569 | ACPI_SCI_HANDLER_INFO *NextSciHandler; |
| 570 | ACPI_CPU_FLAGS Flags; |
| 571 | ACPI_STATUS Status; |
| 572 | |
| 573 | |
| 574 | ACPI_FUNCTION_TRACE (AcpiRemoveSciHandler); |
| 575 | |
| 576 | |
| 577 | if (!Address) |
| 578 | { |
| 579 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 580 | } |
| 581 | |
| 582 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 583 | if (ACPI_FAILURE (Status)) |
| 584 | { |
| 585 | return_ACPI_STATUS (Status); |
| 586 | } |
| 587 | |
| 588 | /* Remove the SCI handler with lock */ |
| 589 | |
| 590 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 591 | |
| 592 | PrevSciHandler = NULL; |
| 593 | NextSciHandler = AcpiGbl_SciHandlerList; |
| 594 | while (NextSciHandler) |
| 595 | { |
| 596 | if (NextSciHandler->Address == Address) |
| 597 | { |
| 598 | /* Unlink and free the SCI handler info block */ |
| 599 | |
| 600 | if (PrevSciHandler) |
| 601 | { |
| 602 | PrevSciHandler->Next = NextSciHandler->Next; |
| 603 | } |
| 604 | else |
| 605 | { |
| 606 | AcpiGbl_SciHandlerList = NextSciHandler->Next; |
| 607 | } |
| 608 | |
| 609 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 610 | ACPI_FREE (NextSciHandler); |
| 611 | goto UnlockAndExit; |
| 612 | } |
| 613 | |
| 614 | PrevSciHandler = NextSciHandler; |
| 615 | NextSciHandler = NextSciHandler->Next; |
| 616 | } |
| 617 | |
| 618 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 619 | Status = AE_NOT_EXIST; |
| 620 | |
| 621 | |
| 622 | UnlockAndExit: |
| 623 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 624 | return_ACPI_STATUS (Status); |
| 625 | } |
| 626 | |
| 627 | ACPI_EXPORT_SYMBOL (AcpiRemoveSciHandler) |
| 628 | |
| 629 | |
| 630 | /******************************************************************************* |
| 631 | * |
| 632 | * FUNCTION: AcpiInstallGlobalEventHandler |
| 633 | * |
| 634 | * PARAMETERS: Handler - Pointer to the global event handler function |
| 635 | * Context - Value passed to the handler on each event |
| 636 | * |
| 637 | * RETURN: Status |
| 638 | * |
| 639 | * DESCRIPTION: Saves the pointer to the handler function. The global handler |
| 640 | * is invoked upon each incoming GPE and Fixed Event. It is |
| 641 | * invoked at interrupt level at the time of the event dispatch. |
| 642 | * Can be used to update event counters, etc. |
| 643 | * |
| 644 | ******************************************************************************/ |
| 645 | |
| 646 | ACPI_STATUS |
| 647 | AcpiInstallGlobalEventHandler ( |
| 648 | ACPI_GBL_EVENT_HANDLER Handler, |
| 649 | void *Context) |
| 650 | { |
| 651 | ACPI_STATUS Status; |
| 652 | |
| 653 | |
| 654 | ACPI_FUNCTION_TRACE (AcpiInstallGlobalEventHandler); |
| 655 | |
| 656 | |
| 657 | /* Parameter validation */ |
| 658 | |
| 659 | if (!Handler) |
| 660 | { |
| 661 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 662 | } |
| 663 | |
| 664 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 665 | if (ACPI_FAILURE (Status)) |
| 666 | { |
| 667 | return_ACPI_STATUS (Status); |
| 668 | } |
| 669 | |
| 670 | /* Don't allow two handlers. */ |
| 671 | |
| 672 | if (AcpiGbl_GlobalEventHandler) |
| 673 | { |
| 674 | Status = AE_ALREADY_EXISTS; |
| 675 | goto Cleanup; |
| 676 | } |
| 677 | |
| 678 | AcpiGbl_GlobalEventHandler = Handler; |
| 679 | AcpiGbl_GlobalEventHandlerContext = Context; |
| 680 | |
| 681 | |
| 682 | Cleanup: |
| 683 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 684 | return_ACPI_STATUS (Status); |
| 685 | } |
| 686 | |
| 687 | ACPI_EXPORT_SYMBOL (AcpiInstallGlobalEventHandler) |
| 688 | |
| 689 | |
| 690 | /******************************************************************************* |
| 691 | * |
| 692 | * FUNCTION: AcpiInstallFixedEventHandler |
| 693 | * |
| 694 | * PARAMETERS: Event - Event type to enable. |
| 695 | * Handler - Pointer to the handler function for the |
| 696 | * event |
| 697 | * Context - Value passed to the handler on each GPE |
| 698 | * |
| 699 | * RETURN: Status |
| 700 | * |
| 701 | * DESCRIPTION: Saves the pointer to the handler function and then enables the |
| 702 | * event. |
| 703 | * |
| 704 | ******************************************************************************/ |
| 705 | |
| 706 | ACPI_STATUS |
| 707 | AcpiInstallFixedEventHandler ( |
| 708 | UINT32 Event, |
| 709 | ACPI_EVENT_HANDLER Handler, |
| 710 | void *Context) |
| 711 | { |
| 712 | ACPI_STATUS Status; |
| 713 | |
| 714 | |
| 715 | ACPI_FUNCTION_TRACE (AcpiInstallFixedEventHandler); |
| 716 | |
| 717 | |
| 718 | /* Parameter validation */ |
| 719 | |
| 720 | if (Event > ACPI_EVENT_MAX) |
| 721 | { |
| 722 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 723 | } |
| 724 | |
| 725 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 726 | if (ACPI_FAILURE (Status)) |
| 727 | { |
| 728 | return_ACPI_STATUS (Status); |
| 729 | } |
| 730 | |
| 731 | /* Do not allow multiple handlers */ |
| 732 | |
| 733 | if (AcpiGbl_FixedEventHandlers[Event].Handler) |
| 734 | { |
| 735 | Status = AE_ALREADY_EXISTS; |
| 736 | goto Cleanup; |
| 737 | } |
| 738 | |
| 739 | /* Install the handler before enabling the event */ |
| 740 | |
| 741 | AcpiGbl_FixedEventHandlers[Event].Handler = Handler; |
| 742 | AcpiGbl_FixedEventHandlers[Event].Context = Context; |
| 743 | |
| 744 | Status = AcpiEnableEvent (Event, 0); |
| 745 | if (ACPI_FAILURE (Status)) |
| 746 | { |
| 747 | ACPI_WARNING ((AE_INFO, |
| 748 | "Could not enable fixed event - %s (%u)" , |
| 749 | AcpiUtGetEventName (Event), Event)); |
| 750 | |
| 751 | /* Remove the handler */ |
| 752 | |
| 753 | AcpiGbl_FixedEventHandlers[Event].Handler = NULL; |
| 754 | AcpiGbl_FixedEventHandlers[Event].Context = NULL; |
| 755 | } |
| 756 | else |
| 757 | { |
| 758 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 759 | "Enabled fixed event %s (%X), Handler=%p\n" , |
| 760 | AcpiUtGetEventName (Event), Event, Handler)); |
| 761 | } |
| 762 | |
| 763 | |
| 764 | Cleanup: |
| 765 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 766 | return_ACPI_STATUS (Status); |
| 767 | } |
| 768 | |
| 769 | ACPI_EXPORT_SYMBOL (AcpiInstallFixedEventHandler) |
| 770 | |
| 771 | |
| 772 | /******************************************************************************* |
| 773 | * |
| 774 | * FUNCTION: AcpiRemoveFixedEventHandler |
| 775 | * |
| 776 | * PARAMETERS: Event - Event type to disable. |
| 777 | * Handler - Address of the handler |
| 778 | * |
| 779 | * RETURN: Status |
| 780 | * |
| 781 | * DESCRIPTION: Disables the event and unregisters the event handler. |
| 782 | * |
| 783 | ******************************************************************************/ |
| 784 | |
| 785 | ACPI_STATUS |
| 786 | AcpiRemoveFixedEventHandler ( |
| 787 | UINT32 Event, |
| 788 | ACPI_EVENT_HANDLER Handler) |
| 789 | { |
| 790 | ACPI_STATUS Status = AE_OK; |
| 791 | |
| 792 | |
| 793 | ACPI_FUNCTION_TRACE (AcpiRemoveFixedEventHandler); |
| 794 | |
| 795 | |
| 796 | /* Parameter validation */ |
| 797 | |
| 798 | if (Event > ACPI_EVENT_MAX) |
| 799 | { |
| 800 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 801 | } |
| 802 | |
| 803 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 804 | if (ACPI_FAILURE (Status)) |
| 805 | { |
| 806 | return_ACPI_STATUS (Status); |
| 807 | } |
| 808 | |
| 809 | /* Disable the event before removing the handler */ |
| 810 | |
| 811 | Status = AcpiDisableEvent (Event, 0); |
| 812 | |
| 813 | /* Always Remove the handler */ |
| 814 | |
| 815 | AcpiGbl_FixedEventHandlers[Event].Handler = NULL; |
| 816 | AcpiGbl_FixedEventHandlers[Event].Context = NULL; |
| 817 | |
| 818 | if (ACPI_FAILURE (Status)) |
| 819 | { |
| 820 | ACPI_WARNING ((AE_INFO, |
| 821 | "Could not disable fixed event - %s (%u)" , |
| 822 | AcpiUtGetEventName (Event), Event)); |
| 823 | } |
| 824 | else |
| 825 | { |
| 826 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 827 | "Disabled fixed event - %s (%X)\n" , |
| 828 | AcpiUtGetEventName (Event), Event)); |
| 829 | } |
| 830 | |
| 831 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 832 | return_ACPI_STATUS (Status); |
| 833 | } |
| 834 | |
| 835 | ACPI_EXPORT_SYMBOL (AcpiRemoveFixedEventHandler) |
| 836 | |
| 837 | |
| 838 | /******************************************************************************* |
| 839 | * |
| 840 | * FUNCTION: AcpiEvInstallGpeHandler |
| 841 | * |
| 842 | * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| 843 | * defined GPEs) |
| 844 | * GpeNumber - The GPE number within the GPE block |
| 845 | * Type - Whether this GPE should be treated as an |
| 846 | * edge- or level-triggered interrupt. |
| 847 | * IsRawHandler - Whether this GPE should be handled using |
| 848 | * the special GPE handler mode. |
| 849 | * Address - Address of the handler |
| 850 | * Context - Value passed to the handler on each GPE |
| 851 | * |
| 852 | * RETURN: Status |
| 853 | * |
| 854 | * DESCRIPTION: Internal function to install a handler for a General Purpose |
| 855 | * Event. |
| 856 | * |
| 857 | ******************************************************************************/ |
| 858 | |
| 859 | static ACPI_STATUS |
| 860 | AcpiEvInstallGpeHandler ( |
| 861 | ACPI_HANDLE GpeDevice, |
| 862 | UINT32 GpeNumber, |
| 863 | UINT32 Type, |
| 864 | BOOLEAN IsRawHandler, |
| 865 | ACPI_GPE_HANDLER Address, |
| 866 | void *Context) |
| 867 | { |
| 868 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 869 | ACPI_GPE_HANDLER_INFO *Handler; |
| 870 | ACPI_STATUS Status; |
| 871 | ACPI_CPU_FLAGS Flags; |
| 872 | |
| 873 | |
| 874 | ACPI_FUNCTION_TRACE (EvInstallGpeHandler); |
| 875 | |
| 876 | |
| 877 | /* Parameter validation */ |
| 878 | |
| 879 | if ((!Address) || (Type & ~ACPI_GPE_XRUPT_TYPE_MASK)) |
| 880 | { |
| 881 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 882 | } |
| 883 | |
| 884 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 885 | if (ACPI_FAILURE (Status)) |
| 886 | { |
| 887 | return_ACPI_STATUS (Status); |
| 888 | } |
| 889 | |
| 890 | /* Allocate and init handler object (before lock) */ |
| 891 | |
| 892 | Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_HANDLER_INFO)); |
| 893 | if (!Handler) |
| 894 | { |
| 895 | Status = AE_NO_MEMORY; |
| 896 | goto UnlockAndExit; |
| 897 | } |
| 898 | |
| 899 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 900 | |
| 901 | /* Ensure that we have a valid GPE number */ |
| 902 | |
| 903 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 904 | if (!GpeEventInfo) |
| 905 | { |
| 906 | Status = AE_BAD_PARAMETER; |
| 907 | goto FreeAndExit; |
| 908 | } |
| 909 | |
| 910 | /* Make sure that there isn't a handler there already */ |
| 911 | |
| 912 | if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| 913 | ACPI_GPE_DISPATCH_HANDLER) || |
| 914 | (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| 915 | ACPI_GPE_DISPATCH_RAW_HANDLER)) |
| 916 | { |
| 917 | Status = AE_ALREADY_EXISTS; |
| 918 | goto FreeAndExit; |
| 919 | } |
| 920 | |
| 921 | Handler->Address = Address; |
| 922 | Handler->Context = Context; |
| 923 | Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode; |
| 924 | Handler->OriginalFlags = (UINT8) (GpeEventInfo->Flags & |
| 925 | (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK)); |
| 926 | |
| 927 | /* |
| 928 | * If the GPE is associated with a method, it may have been enabled |
| 929 | * automatically during initialization, in which case it has to be |
| 930 | * disabled now to avoid spurious execution of the handler. |
| 931 | */ |
| 932 | if (((ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| 933 | ACPI_GPE_DISPATCH_METHOD) || |
| 934 | (ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| 935 | ACPI_GPE_DISPATCH_NOTIFY)) && |
| 936 | GpeEventInfo->RuntimeCount) |
| 937 | { |
| 938 | Handler->OriginallyEnabled = TRUE; |
| 939 | (void) AcpiEvRemoveGpeReference (GpeEventInfo); |
| 940 | |
| 941 | /* Sanity check of original type against new type */ |
| 942 | |
| 943 | if (Type != (UINT32) (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK)) |
| 944 | { |
| 945 | ACPI_WARNING ((AE_INFO, "GPE type mismatch (level/edge)" )); |
| 946 | } |
| 947 | } |
| 948 | |
| 949 | /* Install the handler */ |
| 950 | |
| 951 | GpeEventInfo->Dispatch.Handler = Handler; |
| 952 | |
| 953 | /* Setup up dispatch flags to indicate handler (vs. method/notify) */ |
| 954 | |
| 955 | GpeEventInfo->Flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); |
| 956 | GpeEventInfo->Flags |= (UINT8) (Type | (IsRawHandler ? |
| 957 | ACPI_GPE_DISPATCH_RAW_HANDLER : ACPI_GPE_DISPATCH_HANDLER)); |
| 958 | |
| 959 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 960 | |
| 961 | |
| 962 | UnlockAndExit: |
| 963 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 964 | return_ACPI_STATUS (Status); |
| 965 | |
| 966 | FreeAndExit: |
| 967 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 968 | ACPI_FREE (Handler); |
| 969 | goto UnlockAndExit; |
| 970 | } |
| 971 | |
| 972 | |
| 973 | /******************************************************************************* |
| 974 | * |
| 975 | * FUNCTION: AcpiInstallGpeHandler |
| 976 | * |
| 977 | * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| 978 | * defined GPEs) |
| 979 | * GpeNumber - The GPE number within the GPE block |
| 980 | * Type - Whether this GPE should be treated as an |
| 981 | * edge- or level-triggered interrupt. |
| 982 | * Address - Address of the handler |
| 983 | * Context - Value passed to the handler on each GPE |
| 984 | * |
| 985 | * RETURN: Status |
| 986 | * |
| 987 | * DESCRIPTION: Install a handler for a General Purpose Event. |
| 988 | * |
| 989 | ******************************************************************************/ |
| 990 | |
| 991 | ACPI_STATUS |
| 992 | AcpiInstallGpeHandler ( |
| 993 | ACPI_HANDLE GpeDevice, |
| 994 | UINT32 GpeNumber, |
| 995 | UINT32 Type, |
| 996 | ACPI_GPE_HANDLER Address, |
| 997 | void *Context) |
| 998 | { |
| 999 | ACPI_STATUS Status; |
| 1000 | |
| 1001 | |
| 1002 | ACPI_FUNCTION_TRACE (AcpiInstallGpeHandler); |
| 1003 | |
| 1004 | |
| 1005 | Status = AcpiEvInstallGpeHandler (GpeDevice, GpeNumber, Type, |
| 1006 | FALSE, Address, Context); |
| 1007 | |
| 1008 | return_ACPI_STATUS (Status); |
| 1009 | } |
| 1010 | |
| 1011 | ACPI_EXPORT_SYMBOL (AcpiInstallGpeHandler) |
| 1012 | |
| 1013 | |
| 1014 | /******************************************************************************* |
| 1015 | * |
| 1016 | * FUNCTION: AcpiInstallGpeRawHandler |
| 1017 | * |
| 1018 | * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| 1019 | * defined GPEs) |
| 1020 | * GpeNumber - The GPE number within the GPE block |
| 1021 | * Type - Whether this GPE should be treated as an |
| 1022 | * edge- or level-triggered interrupt. |
| 1023 | * Address - Address of the handler |
| 1024 | * Context - Value passed to the handler on each GPE |
| 1025 | * |
| 1026 | * RETURN: Status |
| 1027 | * |
| 1028 | * DESCRIPTION: Install a handler for a General Purpose Event. |
| 1029 | * |
| 1030 | ******************************************************************************/ |
| 1031 | |
| 1032 | ACPI_STATUS |
| 1033 | AcpiInstallGpeRawHandler ( |
| 1034 | ACPI_HANDLE GpeDevice, |
| 1035 | UINT32 GpeNumber, |
| 1036 | UINT32 Type, |
| 1037 | ACPI_GPE_HANDLER Address, |
| 1038 | void *Context) |
| 1039 | { |
| 1040 | ACPI_STATUS Status; |
| 1041 | |
| 1042 | |
| 1043 | ACPI_FUNCTION_TRACE (AcpiInstallGpeRawHandler); |
| 1044 | |
| 1045 | |
| 1046 | Status = AcpiEvInstallGpeHandler (GpeDevice, GpeNumber, Type, |
| 1047 | TRUE, Address, Context); |
| 1048 | |
| 1049 | return_ACPI_STATUS (Status); |
| 1050 | } |
| 1051 | |
| 1052 | ACPI_EXPORT_SYMBOL (AcpiInstallGpeRawHandler) |
| 1053 | |
| 1054 | |
| 1055 | /******************************************************************************* |
| 1056 | * |
| 1057 | * FUNCTION: AcpiRemoveGpeHandler |
| 1058 | * |
| 1059 | * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| 1060 | * defined GPEs) |
| 1061 | * GpeNumber - The event to remove a handler |
| 1062 | * Address - Address of the handler |
| 1063 | * |
| 1064 | * RETURN: Status |
| 1065 | * |
| 1066 | * DESCRIPTION: Remove a handler for a General Purpose AcpiEvent. |
| 1067 | * |
| 1068 | ******************************************************************************/ |
| 1069 | |
| 1070 | ACPI_STATUS |
| 1071 | AcpiRemoveGpeHandler ( |
| 1072 | ACPI_HANDLE GpeDevice, |
| 1073 | UINT32 GpeNumber, |
| 1074 | ACPI_GPE_HANDLER Address) |
| 1075 | { |
| 1076 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 1077 | ACPI_GPE_HANDLER_INFO *Handler; |
| 1078 | ACPI_STATUS Status; |
| 1079 | ACPI_CPU_FLAGS Flags; |
| 1080 | |
| 1081 | |
| 1082 | ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler); |
| 1083 | |
| 1084 | |
| 1085 | /* Parameter validation */ |
| 1086 | |
| 1087 | if (!Address) |
| 1088 | { |
| 1089 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 1090 | } |
| 1091 | |
| 1092 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 1093 | if (ACPI_FAILURE (Status)) |
| 1094 | { |
| 1095 | return_ACPI_STATUS (Status); |
| 1096 | } |
| 1097 | |
| 1098 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 1099 | |
| 1100 | /* Ensure that we have a valid GPE number */ |
| 1101 | |
| 1102 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 1103 | if (!GpeEventInfo) |
| 1104 | { |
| 1105 | Status = AE_BAD_PARAMETER; |
| 1106 | goto UnlockAndExit; |
| 1107 | } |
| 1108 | |
| 1109 | /* Make sure that a handler is indeed installed */ |
| 1110 | |
| 1111 | if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != |
| 1112 | ACPI_GPE_DISPATCH_HANDLER) && |
| 1113 | (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != |
| 1114 | ACPI_GPE_DISPATCH_RAW_HANDLER)) |
| 1115 | { |
| 1116 | Status = AE_NOT_EXIST; |
| 1117 | goto UnlockAndExit; |
| 1118 | } |
| 1119 | |
| 1120 | /* Make sure that the installed handler is the same */ |
| 1121 | |
| 1122 | if (GpeEventInfo->Dispatch.Handler->Address != Address) |
| 1123 | { |
| 1124 | Status = AE_BAD_PARAMETER; |
| 1125 | goto UnlockAndExit; |
| 1126 | } |
| 1127 | |
| 1128 | /* Remove the handler */ |
| 1129 | |
| 1130 | Handler = GpeEventInfo->Dispatch.Handler; |
| 1131 | GpeEventInfo->Dispatch.Handler = NULL; |
| 1132 | |
| 1133 | /* Restore Method node (if any), set dispatch flags */ |
| 1134 | |
| 1135 | GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode; |
| 1136 | GpeEventInfo->Flags &= |
| 1137 | ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); |
| 1138 | GpeEventInfo->Flags |= Handler->OriginalFlags; |
| 1139 | |
| 1140 | /* |
| 1141 | * If the GPE was previously associated with a method and it was |
| 1142 | * enabled, it should be enabled at this point to restore the |
| 1143 | * post-initialization configuration. |
| 1144 | */ |
| 1145 | if (((ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| 1146 | ACPI_GPE_DISPATCH_METHOD) || |
| 1147 | (ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| 1148 | ACPI_GPE_DISPATCH_NOTIFY)) && |
| 1149 | Handler->OriginallyEnabled) |
| 1150 | { |
| 1151 | (void) AcpiEvAddGpeReference (GpeEventInfo); |
| 1152 | } |
| 1153 | |
| 1154 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 1155 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 1156 | |
| 1157 | /* Make sure all deferred GPE tasks are completed */ |
| 1158 | |
| 1159 | AcpiOsWaitEventsComplete (); |
| 1160 | |
| 1161 | /* Now we can free the handler object */ |
| 1162 | |
| 1163 | ACPI_FREE (Handler); |
| 1164 | return_ACPI_STATUS (Status); |
| 1165 | |
| 1166 | UnlockAndExit: |
| 1167 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 1168 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 1169 | return_ACPI_STATUS (Status); |
| 1170 | } |
| 1171 | |
| 1172 | ACPI_EXPORT_SYMBOL (AcpiRemoveGpeHandler) |
| 1173 | |
| 1174 | |
| 1175 | /******************************************************************************* |
| 1176 | * |
| 1177 | * FUNCTION: AcpiAcquireGlobalLock |
| 1178 | * |
| 1179 | * PARAMETERS: Timeout - How long the caller is willing to wait |
| 1180 | * Handle - Where the handle to the lock is returned |
| 1181 | * (if acquired) |
| 1182 | * |
| 1183 | * RETURN: Status |
| 1184 | * |
| 1185 | * DESCRIPTION: Acquire the ACPI Global Lock |
| 1186 | * |
| 1187 | * Note: Allows callers with the same thread ID to acquire the global lock |
| 1188 | * multiple times. In other words, externally, the behavior of the global lock |
| 1189 | * is identical to an AML mutex. On the first acquire, a new handle is |
| 1190 | * returned. On any subsequent calls to acquire by the same thread, the same |
| 1191 | * handle is returned. |
| 1192 | * |
| 1193 | ******************************************************************************/ |
| 1194 | |
| 1195 | ACPI_STATUS |
| 1196 | AcpiAcquireGlobalLock ( |
| 1197 | UINT16 Timeout, |
| 1198 | UINT32 *Handle) |
| 1199 | { |
| 1200 | ACPI_STATUS Status; |
| 1201 | |
| 1202 | |
| 1203 | if (!Handle) |
| 1204 | { |
| 1205 | return (AE_BAD_PARAMETER); |
| 1206 | } |
| 1207 | |
| 1208 | /* Must lock interpreter to prevent race conditions */ |
| 1209 | |
| 1210 | AcpiExEnterInterpreter (); |
| 1211 | |
| 1212 | Status = AcpiExAcquireMutexObject (Timeout, |
| 1213 | AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ()); |
| 1214 | |
| 1215 | if (ACPI_SUCCESS (Status)) |
| 1216 | { |
| 1217 | /* Return the global lock handle (updated in AcpiEvAcquireGlobalLock) */ |
| 1218 | |
| 1219 | *Handle = AcpiGbl_GlobalLockHandle; |
| 1220 | } |
| 1221 | |
| 1222 | AcpiExExitInterpreter (); |
| 1223 | return (Status); |
| 1224 | } |
| 1225 | |
| 1226 | ACPI_EXPORT_SYMBOL (AcpiAcquireGlobalLock) |
| 1227 | |
| 1228 | |
| 1229 | /******************************************************************************* |
| 1230 | * |
| 1231 | * FUNCTION: AcpiReleaseGlobalLock |
| 1232 | * |
| 1233 | * PARAMETERS: Handle - Returned from AcpiAcquireGlobalLock |
| 1234 | * |
| 1235 | * RETURN: Status |
| 1236 | * |
| 1237 | * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. |
| 1238 | * |
| 1239 | ******************************************************************************/ |
| 1240 | |
| 1241 | ACPI_STATUS |
| 1242 | AcpiReleaseGlobalLock ( |
| 1243 | UINT32 Handle) |
| 1244 | { |
| 1245 | ACPI_STATUS Status; |
| 1246 | |
| 1247 | |
| 1248 | if (!Handle || (Handle != AcpiGbl_GlobalLockHandle)) |
| 1249 | { |
| 1250 | return (AE_NOT_ACQUIRED); |
| 1251 | } |
| 1252 | |
| 1253 | Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex); |
| 1254 | return (Status); |
| 1255 | } |
| 1256 | |
| 1257 | ACPI_EXPORT_SYMBOL (AcpiReleaseGlobalLock) |
| 1258 | |
| 1259 | #endif /* !ACPI_REDUCED_HARDWARE */ |
| 1260 | |