| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evgpe - General Purpose Event handling and dispatch |
| 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 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acevents.h" |
| 47 | #include "acnamesp.h" |
| 48 | |
| 49 | #define _COMPONENT ACPI_EVENTS |
| 50 | ACPI_MODULE_NAME ("evgpe" ) |
| 51 | |
| 52 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
| 53 | |
| 54 | /* Local prototypes */ |
| 55 | |
| 56 | static void ACPI_SYSTEM_XFACE |
| 57 | AcpiEvAsynchExecuteGpeMethod ( |
| 58 | void *Context); |
| 59 | |
| 60 | static void ACPI_SYSTEM_XFACE |
| 61 | AcpiEvAsynchEnableGpe ( |
| 62 | void *Context); |
| 63 | |
| 64 | |
| 65 | /******************************************************************************* |
| 66 | * |
| 67 | * FUNCTION: AcpiEvUpdateGpeEnableMask |
| 68 | * |
| 69 | * PARAMETERS: GpeEventInfo - GPE to update |
| 70 | * |
| 71 | * RETURN: Status |
| 72 | * |
| 73 | * DESCRIPTION: Updates GPE register enable mask based upon whether there are |
| 74 | * runtime references to this GPE |
| 75 | * |
| 76 | ******************************************************************************/ |
| 77 | |
| 78 | ACPI_STATUS |
| 79 | AcpiEvUpdateGpeEnableMask ( |
| 80 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
| 81 | { |
| 82 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; |
| 83 | UINT32 RegisterBit; |
| 84 | |
| 85 | |
| 86 | ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMask); |
| 87 | |
| 88 | |
| 89 | GpeRegisterInfo = GpeEventInfo->RegisterInfo; |
| 90 | if (!GpeRegisterInfo) |
| 91 | { |
| 92 | return_ACPI_STATUS (AE_NOT_EXIST); |
| 93 | } |
| 94 | |
| 95 | RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo); |
| 96 | |
| 97 | /* Clear the run bit up front */ |
| 98 | |
| 99 | ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); |
| 100 | |
| 101 | /* Set the mask bit only if there are references to this GPE */ |
| 102 | |
| 103 | if (GpeEventInfo->RuntimeCount) |
| 104 | { |
| 105 | ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, (UINT8) RegisterBit); |
| 106 | } |
| 107 | |
| 108 | GpeRegisterInfo->EnableMask = GpeRegisterInfo->EnableForRun; |
| 109 | return_ACPI_STATUS (AE_OK); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | /******************************************************************************* |
| 114 | * |
| 115 | * FUNCTION: AcpiEvEnableGpe |
| 116 | * |
| 117 | * PARAMETERS: GpeEventInfo - GPE to enable |
| 118 | * |
| 119 | * RETURN: Status |
| 120 | * |
| 121 | * DESCRIPTION: Clear a GPE of stale events and enable it. |
| 122 | * |
| 123 | ******************************************************************************/ |
| 124 | |
| 125 | ACPI_STATUS |
| 126 | AcpiEvEnableGpe ( |
| 127 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
| 128 | { |
| 129 | ACPI_STATUS Status; |
| 130 | |
| 131 | |
| 132 | ACPI_FUNCTION_TRACE (EvEnableGpe); |
| 133 | |
| 134 | |
| 135 | /* Clear the GPE (of stale events) */ |
| 136 | |
| 137 | Status = AcpiHwClearGpe (GpeEventInfo); |
| 138 | if (ACPI_FAILURE (Status)) |
| 139 | { |
| 140 | return_ACPI_STATUS (Status); |
| 141 | } |
| 142 | |
| 143 | /* Enable the requested GPE */ |
| 144 | |
| 145 | Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE); |
| 146 | return_ACPI_STATUS (Status); |
| 147 | } |
| 148 | |
| 149 | |
| 150 | /******************************************************************************* |
| 151 | * |
| 152 | * FUNCTION: AcpiEvMaskGpe |
| 153 | * |
| 154 | * PARAMETERS: GpeEventInfo - GPE to be blocked/unblocked |
| 155 | * IsMasked - Whether the GPE is masked or not |
| 156 | * |
| 157 | * RETURN: Status |
| 158 | * |
| 159 | * DESCRIPTION: Unconditionally mask/unmask a GPE during runtime. |
| 160 | * |
| 161 | ******************************************************************************/ |
| 162 | |
| 163 | ACPI_STATUS |
| 164 | AcpiEvMaskGpe ( |
| 165 | ACPI_GPE_EVENT_INFO *GpeEventInfo, |
| 166 | BOOLEAN IsMasked) |
| 167 | { |
| 168 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; |
| 169 | UINT32 RegisterBit; |
| 170 | |
| 171 | |
| 172 | ACPI_FUNCTION_TRACE (EvMaskGpe); |
| 173 | |
| 174 | |
| 175 | GpeRegisterInfo = GpeEventInfo->RegisterInfo; |
| 176 | if (!GpeRegisterInfo) |
| 177 | { |
| 178 | return_ACPI_STATUS (AE_NOT_EXIST); |
| 179 | } |
| 180 | |
| 181 | RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo); |
| 182 | |
| 183 | /* Perform the action */ |
| 184 | |
| 185 | if (IsMasked) |
| 186 | { |
| 187 | if (RegisterBit & GpeRegisterInfo->MaskForRun) |
| 188 | { |
| 189 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 190 | } |
| 191 | |
| 192 | (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); |
| 193 | ACPI_SET_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit); |
| 194 | } |
| 195 | else |
| 196 | { |
| 197 | if (!(RegisterBit & GpeRegisterInfo->MaskForRun)) |
| 198 | { |
| 199 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 200 | } |
| 201 | |
| 202 | ACPI_CLEAR_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit); |
| 203 | if (GpeEventInfo->RuntimeCount && |
| 204 | !GpeEventInfo->DisableForDispatch) |
| 205 | { |
| 206 | (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | return_ACPI_STATUS (AE_OK); |
| 211 | } |
| 212 | |
| 213 | |
| 214 | /******************************************************************************* |
| 215 | * |
| 216 | * FUNCTION: AcpiEvAddGpeReference |
| 217 | * |
| 218 | * PARAMETERS: GpeEventInfo - Add a reference to this GPE |
| 219 | * |
| 220 | * RETURN: Status |
| 221 | * |
| 222 | * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is |
| 223 | * hardware-enabled. |
| 224 | * |
| 225 | ******************************************************************************/ |
| 226 | |
| 227 | ACPI_STATUS |
| 228 | AcpiEvAddGpeReference ( |
| 229 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
| 230 | { |
| 231 | ACPI_STATUS Status = AE_OK; |
| 232 | |
| 233 | |
| 234 | ACPI_FUNCTION_TRACE (EvAddGpeReference); |
| 235 | |
| 236 | |
| 237 | if (GpeEventInfo->RuntimeCount == ACPI_UINT8_MAX) |
| 238 | { |
| 239 | return_ACPI_STATUS (AE_LIMIT); |
| 240 | } |
| 241 | |
| 242 | GpeEventInfo->RuntimeCount++; |
| 243 | if (GpeEventInfo->RuntimeCount == 1) |
| 244 | { |
| 245 | /* Enable on first reference */ |
| 246 | |
| 247 | Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo); |
| 248 | if (ACPI_SUCCESS (Status)) |
| 249 | { |
| 250 | Status = AcpiEvEnableGpe (GpeEventInfo); |
| 251 | } |
| 252 | |
| 253 | if (ACPI_FAILURE (Status)) |
| 254 | { |
| 255 | GpeEventInfo->RuntimeCount--; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | return_ACPI_STATUS (Status); |
| 260 | } |
| 261 | |
| 262 | |
| 263 | /******************************************************************************* |
| 264 | * |
| 265 | * FUNCTION: AcpiEvRemoveGpeReference |
| 266 | * |
| 267 | * PARAMETERS: GpeEventInfo - Remove a reference to this GPE |
| 268 | * |
| 269 | * RETURN: Status |
| 270 | * |
| 271 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is |
| 272 | * removed, the GPE is hardware-disabled. |
| 273 | * |
| 274 | ******************************************************************************/ |
| 275 | |
| 276 | ACPI_STATUS |
| 277 | AcpiEvRemoveGpeReference ( |
| 278 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
| 279 | { |
| 280 | ACPI_STATUS Status = AE_OK; |
| 281 | |
| 282 | |
| 283 | ACPI_FUNCTION_TRACE (EvRemoveGpeReference); |
| 284 | |
| 285 | |
| 286 | if (!GpeEventInfo->RuntimeCount) |
| 287 | { |
| 288 | return_ACPI_STATUS (AE_LIMIT); |
| 289 | } |
| 290 | |
| 291 | GpeEventInfo->RuntimeCount--; |
| 292 | if (!GpeEventInfo->RuntimeCount) |
| 293 | { |
| 294 | /* Disable on last reference */ |
| 295 | |
| 296 | Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo); |
| 297 | if (ACPI_SUCCESS (Status)) |
| 298 | { |
| 299 | Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); |
| 300 | } |
| 301 | |
| 302 | if (ACPI_FAILURE (Status)) |
| 303 | { |
| 304 | GpeEventInfo->RuntimeCount++; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | return_ACPI_STATUS (Status); |
| 309 | } |
| 310 | |
| 311 | |
| 312 | /******************************************************************************* |
| 313 | * |
| 314 | * FUNCTION: AcpiEvLowGetGpeInfo |
| 315 | * |
| 316 | * PARAMETERS: GpeNumber - Raw GPE number |
| 317 | * GpeBlock - A GPE info block |
| 318 | * |
| 319 | * RETURN: A GPE EventInfo struct. NULL if not a valid GPE (The GpeNumber |
| 320 | * is not within the specified GPE block) |
| 321 | * |
| 322 | * DESCRIPTION: Returns the EventInfo struct associated with this GPE. This is |
| 323 | * the low-level implementation of EvGetGpeEventInfo. |
| 324 | * |
| 325 | ******************************************************************************/ |
| 326 | |
| 327 | ACPI_GPE_EVENT_INFO * |
| 328 | AcpiEvLowGetGpeInfo ( |
| 329 | UINT32 GpeNumber, |
| 330 | ACPI_GPE_BLOCK_INFO *GpeBlock) |
| 331 | { |
| 332 | UINT32 GpeIndex; |
| 333 | |
| 334 | |
| 335 | /* |
| 336 | * Validate that the GpeNumber is within the specified GpeBlock. |
| 337 | * (Two steps) |
| 338 | */ |
| 339 | if (!GpeBlock || |
| 340 | (GpeNumber < GpeBlock->BlockBaseNumber)) |
| 341 | { |
| 342 | return (NULL); |
| 343 | } |
| 344 | |
| 345 | GpeIndex = GpeNumber - GpeBlock->BlockBaseNumber; |
| 346 | if (GpeIndex >= GpeBlock->GpeCount) |
| 347 | { |
| 348 | return (NULL); |
| 349 | } |
| 350 | |
| 351 | return (&GpeBlock->EventInfo[GpeIndex]); |
| 352 | } |
| 353 | |
| 354 | |
| 355 | /******************************************************************************* |
| 356 | * |
| 357 | * FUNCTION: AcpiEvGetGpeEventInfo |
| 358 | * |
| 359 | * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 |
| 360 | * GpeNumber - Raw GPE number |
| 361 | * |
| 362 | * RETURN: A GPE EventInfo struct. NULL if not a valid GPE |
| 363 | * |
| 364 | * DESCRIPTION: Returns the EventInfo struct associated with this GPE. |
| 365 | * Validates the GpeBlock and the GpeNumber |
| 366 | * |
| 367 | * Should be called only when the GPE lists are semaphore locked |
| 368 | * and not subject to change. |
| 369 | * |
| 370 | ******************************************************************************/ |
| 371 | |
| 372 | ACPI_GPE_EVENT_INFO * |
| 373 | AcpiEvGetGpeEventInfo ( |
| 374 | ACPI_HANDLE GpeDevice, |
| 375 | UINT32 GpeNumber) |
| 376 | { |
| 377 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 378 | ACPI_GPE_EVENT_INFO *GpeInfo; |
| 379 | UINT32 i; |
| 380 | |
| 381 | |
| 382 | ACPI_FUNCTION_ENTRY (); |
| 383 | |
| 384 | |
| 385 | /* A NULL GpeDevice means use the FADT-defined GPE block(s) */ |
| 386 | |
| 387 | if (!GpeDevice) |
| 388 | { |
| 389 | /* Examine GPE Block 0 and 1 (These blocks are permanent) */ |
| 390 | |
| 391 | for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) |
| 392 | { |
| 393 | GpeInfo = AcpiEvLowGetGpeInfo (GpeNumber, |
| 394 | AcpiGbl_GpeFadtBlocks[i]); |
| 395 | if (GpeInfo) |
| 396 | { |
| 397 | return (GpeInfo); |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | /* The GpeNumber was not in the range of either FADT GPE block */ |
| 402 | |
| 403 | return (NULL); |
| 404 | } |
| 405 | |
| 406 | /* A Non-NULL GpeDevice means this is a GPE Block Device */ |
| 407 | |
| 408 | ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice); |
| 409 | if (!ObjDesc || |
| 410 | !ObjDesc->Device.GpeBlock) |
| 411 | { |
| 412 | return (NULL); |
| 413 | } |
| 414 | |
| 415 | return (AcpiEvLowGetGpeInfo (GpeNumber, ObjDesc->Device.GpeBlock)); |
| 416 | } |
| 417 | |
| 418 | |
| 419 | /******************************************************************************* |
| 420 | * |
| 421 | * FUNCTION: AcpiEvGpeDetect |
| 422 | * |
| 423 | * PARAMETERS: GpeXruptList - Interrupt block for this interrupt. |
| 424 | * Can have multiple GPE blocks attached. |
| 425 | * |
| 426 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
| 427 | * |
| 428 | * DESCRIPTION: Detect if any GP events have occurred. This function is |
| 429 | * executed at interrupt level. |
| 430 | * |
| 431 | ******************************************************************************/ |
| 432 | |
| 433 | UINT32 |
| 434 | AcpiEvGpeDetect ( |
| 435 | ACPI_GPE_XRUPT_INFO *GpeXruptList) |
| 436 | { |
| 437 | ACPI_STATUS Status; |
| 438 | ACPI_GPE_BLOCK_INFO *GpeBlock; |
| 439 | ACPI_NAMESPACE_NODE *GpeDevice; |
| 440 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; |
| 441 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 442 | UINT32 GpeNumber; |
| 443 | ACPI_GPE_HANDLER_INFO *GpeHandlerInfo; |
| 444 | UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; |
| 445 | UINT8 EnabledStatusByte; |
| 446 | UINT32 StatusReg; |
| 447 | UINT32 EnableReg; |
| 448 | ACPI_CPU_FLAGS Flags; |
| 449 | UINT32 i; |
| 450 | UINT32 j; |
| 451 | |
| 452 | |
| 453 | ACPI_FUNCTION_NAME (EvGpeDetect); |
| 454 | |
| 455 | /* Check for the case where there are no GPEs */ |
| 456 | |
| 457 | if (!GpeXruptList) |
| 458 | { |
| 459 | return (IntStatus); |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * We need to obtain the GPE lock for both the data structs and registers |
| 464 | * Note: Not necessary to obtain the hardware lock, since the GPE |
| 465 | * registers are owned by the GpeLock. |
| 466 | */ |
| 467 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 468 | |
| 469 | /* Examine all GPE blocks attached to this interrupt level */ |
| 470 | |
| 471 | GpeBlock = GpeXruptList->GpeBlockListHead; |
| 472 | while (GpeBlock) |
| 473 | { |
| 474 | GpeDevice = GpeBlock->Node; |
| 475 | |
| 476 | /* |
| 477 | * Read all of the 8-bit GPE status and enable registers in this GPE |
| 478 | * block, saving all of them. Find all currently active GP events. |
| 479 | */ |
| 480 | for (i = 0; i < GpeBlock->RegisterCount; i++) |
| 481 | { |
| 482 | /* Get the next status/enable pair */ |
| 483 | |
| 484 | GpeRegisterInfo = &GpeBlock->RegisterInfo[i]; |
| 485 | |
| 486 | /* |
| 487 | * Optimization: If there are no GPEs enabled within this |
| 488 | * register, we can safely ignore the entire register. |
| 489 | */ |
| 490 | if (!(GpeRegisterInfo->EnableForRun | |
| 491 | GpeRegisterInfo->EnableForWake)) |
| 492 | { |
| 493 | ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, |
| 494 | "Ignore disabled registers for GPE %02X-%02X: " |
| 495 | "RunEnable=%02X, WakeEnable=%02X\n" , |
| 496 | GpeRegisterInfo->BaseGpeNumber, |
| 497 | GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1), |
| 498 | GpeRegisterInfo->EnableForRun, |
| 499 | GpeRegisterInfo->EnableForWake)); |
| 500 | continue; |
| 501 | } |
| 502 | |
| 503 | /* Read the Status Register */ |
| 504 | |
| 505 | Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress); |
| 506 | if (ACPI_FAILURE (Status)) |
| 507 | { |
| 508 | goto UnlockAndExit; |
| 509 | } |
| 510 | |
| 511 | /* Read the Enable Register */ |
| 512 | |
| 513 | Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress); |
| 514 | if (ACPI_FAILURE (Status)) |
| 515 | { |
| 516 | goto UnlockAndExit; |
| 517 | } |
| 518 | |
| 519 | ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, |
| 520 | "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, " |
| 521 | "RunEnable=%02X, WakeEnable=%02X\n" , |
| 522 | GpeRegisterInfo->BaseGpeNumber, |
| 523 | GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1), |
| 524 | StatusReg, EnableReg, |
| 525 | GpeRegisterInfo->EnableForRun, |
| 526 | GpeRegisterInfo->EnableForWake)); |
| 527 | |
| 528 | /* Check if there is anything active at all in this register */ |
| 529 | |
| 530 | EnabledStatusByte = (UINT8) (StatusReg & EnableReg); |
| 531 | if (!EnabledStatusByte) |
| 532 | { |
| 533 | /* No active GPEs in this register, move on */ |
| 534 | |
| 535 | continue; |
| 536 | } |
| 537 | |
| 538 | /* Now look at the individual GPEs in this byte register */ |
| 539 | |
| 540 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) |
| 541 | { |
| 542 | /* Examine one GPE bit */ |
| 543 | |
| 544 | GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i * |
| 545 | ACPI_GPE_REGISTER_WIDTH) + j]; |
| 546 | GpeNumber = j + GpeRegisterInfo->BaseGpeNumber; |
| 547 | |
| 548 | if (EnabledStatusByte & (1 << j)) |
| 549 | { |
| 550 | /* Invoke global event handler if present */ |
| 551 | |
| 552 | AcpiGpeCount++; |
| 553 | if (AcpiGbl_GlobalEventHandler) |
| 554 | { |
| 555 | AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE, |
| 556 | GpeDevice, GpeNumber, |
| 557 | AcpiGbl_GlobalEventHandlerContext); |
| 558 | } |
| 559 | |
| 560 | /* Found an active GPE */ |
| 561 | |
| 562 | if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| 563 | ACPI_GPE_DISPATCH_RAW_HANDLER) |
| 564 | { |
| 565 | /* Dispatch the event to a raw handler */ |
| 566 | |
| 567 | GpeHandlerInfo = GpeEventInfo->Dispatch.Handler; |
| 568 | |
| 569 | /* |
| 570 | * There is no protection around the namespace node |
| 571 | * and the GPE handler to ensure a safe destruction |
| 572 | * because: |
| 573 | * 1. The namespace node is expected to always |
| 574 | * exist after loading a table. |
| 575 | * 2. The GPE handler is expected to be flushed by |
| 576 | * AcpiOsWaitEventsComplete() before the |
| 577 | * destruction. |
| 578 | */ |
| 579 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 580 | IntStatus |= GpeHandlerInfo->Address ( |
| 581 | GpeDevice, GpeNumber, GpeHandlerInfo->Context); |
| 582 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 583 | } |
| 584 | else |
| 585 | { |
| 586 | /* |
| 587 | * Dispatch the event to a standard handler or |
| 588 | * method. |
| 589 | */ |
| 590 | IntStatus |= AcpiEvGpeDispatch (GpeDevice, |
| 591 | GpeEventInfo, GpeNumber); |
| 592 | } |
| 593 | } |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | GpeBlock = GpeBlock->Next; |
| 598 | } |
| 599 | |
| 600 | UnlockAndExit: |
| 601 | |
| 602 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 603 | return (IntStatus); |
| 604 | } |
| 605 | |
| 606 | |
| 607 | /******************************************************************************* |
| 608 | * |
| 609 | * FUNCTION: AcpiEvAsynchExecuteGpeMethod |
| 610 | * |
| 611 | * PARAMETERS: Context (GpeEventInfo) - Info for this GPE |
| 612 | * |
| 613 | * RETURN: None |
| 614 | * |
| 615 | * DESCRIPTION: Perform the actual execution of a GPE control method. This |
| 616 | * function is called from an invocation of AcpiOsExecute and |
| 617 | * therefore does NOT execute at interrupt level - so that |
| 618 | * the control method itself is not executed in the context of |
| 619 | * an interrupt handler. |
| 620 | * |
| 621 | ******************************************************************************/ |
| 622 | |
| 623 | static void ACPI_SYSTEM_XFACE |
| 624 | AcpiEvAsynchExecuteGpeMethod ( |
| 625 | void *Context) |
| 626 | { |
| 627 | ACPI_GPE_EVENT_INFO *GpeEventInfo = Context; |
| 628 | ACPI_STATUS Status = AE_OK; |
| 629 | ACPI_EVALUATE_INFO *Info; |
| 630 | ACPI_GPE_NOTIFY_INFO *Notify; |
| 631 | |
| 632 | |
| 633 | ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod); |
| 634 | |
| 635 | |
| 636 | /* Do the correct dispatch - normal method or implicit notify */ |
| 637 | |
| 638 | switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags)) |
| 639 | { |
| 640 | case ACPI_GPE_DISPATCH_NOTIFY: |
| 641 | /* |
| 642 | * Implicit notify. |
| 643 | * Dispatch a DEVICE_WAKE notify to the appropriate handler. |
| 644 | * NOTE: the request is queued for execution after this method |
| 645 | * completes. The notify handlers are NOT invoked synchronously |
| 646 | * from this thread -- because handlers may in turn run other |
| 647 | * control methods. |
| 648 | * |
| 649 | * June 2012: Expand implicit notify mechanism to support |
| 650 | * notifies on multiple device objects. |
| 651 | */ |
| 652 | Notify = GpeEventInfo->Dispatch.NotifyList; |
| 653 | while (ACPI_SUCCESS (Status) && Notify) |
| 654 | { |
| 655 | Status = AcpiEvQueueNotifyRequest ( |
| 656 | Notify->DeviceNode, ACPI_NOTIFY_DEVICE_WAKE); |
| 657 | |
| 658 | Notify = Notify->Next; |
| 659 | } |
| 660 | break; |
| 661 | |
| 662 | case ACPI_GPE_DISPATCH_METHOD: |
| 663 | |
| 664 | /* Allocate the evaluation information block */ |
| 665 | |
| 666 | Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); |
| 667 | if (!Info) |
| 668 | { |
| 669 | Status = AE_NO_MEMORY; |
| 670 | } |
| 671 | else |
| 672 | { |
| 673 | /* |
| 674 | * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the |
| 675 | * _Lxx/_Exx control method that corresponds to this GPE |
| 676 | */ |
| 677 | Info->PrefixNode = GpeEventInfo->Dispatch.MethodNode; |
| 678 | Info->Flags = ACPI_IGNORE_RETURN_VALUE; |
| 679 | |
| 680 | Status = AcpiNsEvaluate (Info); |
| 681 | ACPI_FREE (Info); |
| 682 | } |
| 683 | |
| 684 | if (ACPI_FAILURE (Status)) |
| 685 | { |
| 686 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 687 | "while evaluating GPE method [%4.4s]" , |
| 688 | AcpiUtGetNodeName (GpeEventInfo->Dispatch.MethodNode))); |
| 689 | } |
| 690 | break; |
| 691 | |
| 692 | default: |
| 693 | |
| 694 | goto ErrorExit; /* Should never happen */ |
| 695 | } |
| 696 | |
| 697 | /* Defer enabling of GPE until all notify handlers are done */ |
| 698 | |
| 699 | Status = AcpiOsExecute (OSL_NOTIFY_HANDLER, |
| 700 | AcpiEvAsynchEnableGpe, GpeEventInfo); |
| 701 | if (ACPI_SUCCESS (Status)) |
| 702 | { |
| 703 | return_VOID; |
| 704 | } |
| 705 | |
| 706 | ErrorExit: |
| 707 | AcpiEvAsynchEnableGpe (GpeEventInfo); |
| 708 | return_VOID; |
| 709 | } |
| 710 | |
| 711 | |
| 712 | /******************************************************************************* |
| 713 | * |
| 714 | * FUNCTION: AcpiEvAsynchEnableGpe |
| 715 | * |
| 716 | * PARAMETERS: Context (GpeEventInfo) - Info for this GPE |
| 717 | * Callback from AcpiOsExecute |
| 718 | * |
| 719 | * RETURN: None |
| 720 | * |
| 721 | * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to |
| 722 | * complete (i.e., finish execution of Notify) |
| 723 | * |
| 724 | ******************************************************************************/ |
| 725 | |
| 726 | static void ACPI_SYSTEM_XFACE |
| 727 | AcpiEvAsynchEnableGpe ( |
| 728 | void *Context) |
| 729 | { |
| 730 | ACPI_GPE_EVENT_INFO *GpeEventInfo = Context; |
| 731 | ACPI_CPU_FLAGS Flags; |
| 732 | |
| 733 | |
| 734 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 735 | (void) AcpiEvFinishGpe (GpeEventInfo); |
| 736 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 737 | |
| 738 | return; |
| 739 | } |
| 740 | |
| 741 | |
| 742 | /******************************************************************************* |
| 743 | * |
| 744 | * FUNCTION: AcpiEvFinishGpe |
| 745 | * |
| 746 | * PARAMETERS: GpeEventInfo - Info for this GPE |
| 747 | * |
| 748 | * RETURN: Status |
| 749 | * |
| 750 | * DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution |
| 751 | * of a GPE method or a synchronous or asynchronous GPE handler. |
| 752 | * |
| 753 | ******************************************************************************/ |
| 754 | |
| 755 | ACPI_STATUS |
| 756 | AcpiEvFinishGpe ( |
| 757 | ACPI_GPE_EVENT_INFO *GpeEventInfo) |
| 758 | { |
| 759 | ACPI_STATUS Status; |
| 760 | |
| 761 | |
| 762 | if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
| 763 | ACPI_GPE_LEVEL_TRIGGERED) |
| 764 | { |
| 765 | /* |
| 766 | * GPE is level-triggered, we clear the GPE status bit after |
| 767 | * handling the event. |
| 768 | */ |
| 769 | Status = AcpiHwClearGpe (GpeEventInfo); |
| 770 | if (ACPI_FAILURE (Status)) |
| 771 | { |
| 772 | return (Status); |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | /* |
| 777 | * Enable this GPE, conditionally. This means that the GPE will |
| 778 | * only be physically enabled if the EnableMask bit is set |
| 779 | * in the EventInfo. |
| 780 | */ |
| 781 | (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE); |
| 782 | GpeEventInfo->DisableForDispatch = FALSE; |
| 783 | return (AE_OK); |
| 784 | } |
| 785 | |
| 786 | |
| 787 | /******************************************************************************* |
| 788 | * |
| 789 | * FUNCTION: AcpiEvGpeDispatch |
| 790 | * |
| 791 | * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 |
| 792 | * GpeEventInfo - Info for this GPE |
| 793 | * GpeNumber - Number relative to the parent GPE block |
| 794 | * |
| 795 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
| 796 | * |
| 797 | * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) |
| 798 | * or method (e.g. _Lxx/_Exx) handler. |
| 799 | * |
| 800 | * This function executes at interrupt level. |
| 801 | * |
| 802 | ******************************************************************************/ |
| 803 | |
| 804 | UINT32 |
| 805 | AcpiEvGpeDispatch ( |
| 806 | ACPI_NAMESPACE_NODE *GpeDevice, |
| 807 | ACPI_GPE_EVENT_INFO *GpeEventInfo, |
| 808 | UINT32 GpeNumber) |
| 809 | { |
| 810 | ACPI_STATUS Status; |
| 811 | UINT32 ReturnValue; |
| 812 | |
| 813 | |
| 814 | ACPI_FUNCTION_TRACE (EvGpeDispatch); |
| 815 | |
| 816 | |
| 817 | /* |
| 818 | * Always disable the GPE so that it does not keep firing before |
| 819 | * any asynchronous activity completes (either from the execution |
| 820 | * of a GPE method or an asynchronous GPE handler.) |
| 821 | * |
| 822 | * If there is no handler or method to run, just disable the |
| 823 | * GPE and leave it disabled permanently to prevent further such |
| 824 | * pointless events from firing. |
| 825 | */ |
| 826 | Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); |
| 827 | if (ACPI_FAILURE (Status)) |
| 828 | { |
| 829 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 830 | "Unable to disable GPE %02X" , GpeNumber)); |
| 831 | return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); |
| 832 | } |
| 833 | |
| 834 | /* |
| 835 | * If edge-triggered, clear the GPE status bit now. Note that |
| 836 | * level-triggered events are cleared after the GPE is serviced. |
| 837 | */ |
| 838 | if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
| 839 | ACPI_GPE_EDGE_TRIGGERED) |
| 840 | { |
| 841 | Status = AcpiHwClearGpe (GpeEventInfo); |
| 842 | if (ACPI_FAILURE (Status)) |
| 843 | { |
| 844 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 845 | "Unable to clear GPE %02X" , GpeNumber)); |
| 846 | (void) AcpiHwLowSetGpe ( |
| 847 | GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE); |
| 848 | return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | GpeEventInfo->DisableForDispatch = TRUE; |
| 853 | |
| 854 | /* |
| 855 | * Dispatch the GPE to either an installed handler or the control |
| 856 | * method associated with this GPE (_Lxx or _Exx). If a handler |
| 857 | * exists, we invoke it and do not attempt to run the method. |
| 858 | * If there is neither a handler nor a method, leave the GPE |
| 859 | * disabled. |
| 860 | */ |
| 861 | switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags)) |
| 862 | { |
| 863 | case ACPI_GPE_DISPATCH_HANDLER: |
| 864 | |
| 865 | /* Invoke the installed handler (at interrupt level) */ |
| 866 | |
| 867 | ReturnValue = GpeEventInfo->Dispatch.Handler->Address ( |
| 868 | GpeDevice, GpeNumber, |
| 869 | GpeEventInfo->Dispatch.Handler->Context); |
| 870 | |
| 871 | /* If requested, clear (if level-triggered) and reenable the GPE */ |
| 872 | |
| 873 | if (ReturnValue & ACPI_REENABLE_GPE) |
| 874 | { |
| 875 | (void) AcpiEvFinishGpe (GpeEventInfo); |
| 876 | } |
| 877 | break; |
| 878 | |
| 879 | case ACPI_GPE_DISPATCH_METHOD: |
| 880 | case ACPI_GPE_DISPATCH_NOTIFY: |
| 881 | /* |
| 882 | * Execute the method associated with the GPE |
| 883 | * NOTE: Level-triggered GPEs are cleared after the method completes. |
| 884 | */ |
| 885 | Status = AcpiOsExecute (OSL_GPE_HANDLER, |
| 886 | AcpiEvAsynchExecuteGpeMethod, GpeEventInfo); |
| 887 | if (ACPI_FAILURE (Status)) |
| 888 | { |
| 889 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 890 | "Unable to queue handler for GPE %02X - event disabled" , |
| 891 | GpeNumber)); |
| 892 | } |
| 893 | break; |
| 894 | |
| 895 | default: |
| 896 | /* |
| 897 | * No handler or method to run! |
| 898 | * 03/2010: This case should no longer be possible. We will not allow |
| 899 | * a GPE to be enabled if it has no handler or method. |
| 900 | */ |
| 901 | ACPI_ERROR ((AE_INFO, |
| 902 | "No handler or method for GPE %02X, disabling event" , |
| 903 | GpeNumber)); |
| 904 | break; |
| 905 | } |
| 906 | |
| 907 | return_UINT32 (ACPI_INTERRUPT_HANDLED); |
| 908 | } |
| 909 | |
| 910 | #endif /* !ACPI_REDUCED_HARDWARE */ |
| 911 | |