1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /****************************************************************************** 3 * 4 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) 5 * 6 * Copyright (C) 2000 - 2019, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #define EXPORT_ACPI_INTERFACES 11 12 #include <acpi/acpi.h> 13 #include "accommon.h" 14 #include "acevents.h" 15 #include "acnamesp.h" 16 17 #define _COMPONENT ACPI_EVENTS 18 ACPI_MODULE_NAME("evxfgpe") 19 20 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ 21 /******************************************************************************* 22 * 23 * FUNCTION: acpi_update_all_gpes 24 * 25 * PARAMETERS: None 26 * 27 * RETURN: Status 28 * 29 * DESCRIPTION: Complete GPE initialization and enable all GPEs that have 30 * associated _Lxx or _Exx methods and are not pointed to by any 31 * device _PRW methods (this indicates that these GPEs are 32 * generally intended for system or device wakeup. Such GPEs 33 * have to be enabled directly when the devices whose _PRW 34 * methods point to them are set up for wakeup signaling.) 35 * 36 * NOTE: Should be called after any GPEs are added to the system. Primarily, 37 * after the system _PRW methods have been run, but also after a GPE Block 38 * Device has been added or if any new GPE methods have been added via a 39 * dynamic table load. 40 * 41 ******************************************************************************/ 42 43 acpi_status acpi_update_all_gpes(void) 44 { 45 acpi_status status; 46 u8 is_polling_needed = FALSE; 47 48 ACPI_FUNCTION_TRACE(acpi_update_all_gpes); 49 50 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); 51 if (ACPI_FAILURE(status)) { 52 return_ACPI_STATUS(status); 53 } 54 55 if (acpi_gbl_all_gpes_initialized) { 56 goto unlock_and_exit; 57 } 58 59 status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, 60 &is_polling_needed); 61 if (ACPI_SUCCESS(status)) { 62 acpi_gbl_all_gpes_initialized = TRUE; 63 } 64 65 unlock_and_exit: 66 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); 67 68 if (is_polling_needed && acpi_gbl_all_gpes_initialized) { 69 70 /* Poll GPEs to handle already triggered events */ 71 72 acpi_ev_gpe_detect(acpi_gbl_gpe_xrupt_list_head); 73 } 74 return_ACPI_STATUS(status); 75 } 76 77 ACPI_EXPORT_SYMBOL(acpi_update_all_gpes) 78 79 /******************************************************************************* 80 * 81 * FUNCTION: acpi_enable_gpe 82 * 83 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 84 * gpe_number - GPE level within the GPE block 85 * 86 * RETURN: Status 87 * 88 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is 89 * hardware-enabled. 90 * 91 ******************************************************************************/ 92 acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) 93 { 94 acpi_status status = AE_BAD_PARAMETER; 95 struct acpi_gpe_event_info *gpe_event_info; 96 acpi_cpu_flags flags; 97 98 ACPI_FUNCTION_TRACE(acpi_enable_gpe); 99 100 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 101 102 /* 103 * Ensure that we have a valid GPE number and that there is some way 104 * of handling the GPE (handler or a GPE method). In other words, we 105 * won't allow a valid GPE to be enabled if there is no way to handle it. 106 */ 107 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 108 if (gpe_event_info) { 109 if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != 110 ACPI_GPE_DISPATCH_NONE) { 111 status = acpi_ev_add_gpe_reference(gpe_event_info); 112 if (ACPI_SUCCESS(status) && 113 ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) { 114 115 /* Poll edge-triggered GPEs to handle existing events */ 116 117 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 118 (void)acpi_ev_detect_gpe(gpe_device, 119 gpe_event_info, 120 gpe_number); 121 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 122 } 123 } else { 124 status = AE_NO_HANDLER; 125 } 126 } 127 128 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 129 return_ACPI_STATUS(status); 130 } 131 ACPI_EXPORT_SYMBOL(acpi_enable_gpe) 132 133 /******************************************************************************* 134 * 135 * FUNCTION: acpi_disable_gpe 136 * 137 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 138 * gpe_number - GPE level within the GPE block 139 * 140 * RETURN: Status 141 * 142 * DESCRIPTION: Remove a reference to a GPE. When the last reference is 143 * removed, only then is the GPE disabled (for runtime GPEs), or 144 * the GPE mask bit disabled (for wake GPEs) 145 * 146 ******************************************************************************/ 147 148 acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) 149 { 150 acpi_status status = AE_BAD_PARAMETER; 151 struct acpi_gpe_event_info *gpe_event_info; 152 acpi_cpu_flags flags; 153 154 ACPI_FUNCTION_TRACE(acpi_disable_gpe); 155 156 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 157 158 /* Ensure that we have a valid GPE number */ 159 160 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 161 if (gpe_event_info) { 162 status = acpi_ev_remove_gpe_reference(gpe_event_info) ; 163 } 164 165 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 166 return_ACPI_STATUS(status); 167 } 168 169 ACPI_EXPORT_SYMBOL(acpi_disable_gpe) 170 171 /******************************************************************************* 172 * 173 * FUNCTION: acpi_set_gpe 174 * 175 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 176 * gpe_number - GPE level within the GPE block 177 * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE 178 * 179 * RETURN: Status 180 * 181 * DESCRIPTION: Enable or disable an individual GPE. This function bypasses 182 * the reference count mechanism used in the acpi_enable_gpe(), 183 * acpi_disable_gpe() interfaces. 184 * This API is typically used by the GPE raw handler mode driver 185 * to switch between the polling mode and the interrupt mode after 186 * the driver has enabled the GPE. 187 * The APIs should be invoked in this order: 188 * acpi_enable_gpe() <- Ensure the reference count > 0 189 * acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode 190 * acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode 191 * acpi_disable_gpe() <- Decrease the reference count 192 * 193 * Note: If a GPE is shared by 2 silicon components, then both the drivers 194 * should support GPE polling mode or disabling the GPE for long period 195 * for one driver may break the other. So use it with care since all 196 * firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode. 197 * 198 ******************************************************************************/ 199 acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action) 200 { 201 struct acpi_gpe_event_info *gpe_event_info; 202 acpi_status status; 203 acpi_cpu_flags flags; 204 205 ACPI_FUNCTION_TRACE(acpi_set_gpe); 206 207 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 208 209 /* Ensure that we have a valid GPE number */ 210 211 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 212 if (!gpe_event_info) { 213 status = AE_BAD_PARAMETER; 214 goto unlock_and_exit; 215 } 216 217 /* Perform the action */ 218 219 switch (action) { 220 case ACPI_GPE_ENABLE: 221 222 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE); 223 gpe_event_info->disable_for_dispatch = FALSE; 224 break; 225 226 case ACPI_GPE_DISABLE: 227 228 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); 229 gpe_event_info->disable_for_dispatch = TRUE; 230 break; 231 232 default: 233 234 status = AE_BAD_PARAMETER; 235 break; 236 } 237 238 unlock_and_exit: 239 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 240 return_ACPI_STATUS(status); 241 } 242 243 ACPI_EXPORT_SYMBOL(acpi_set_gpe) 244 245 /******************************************************************************* 246 * 247 * FUNCTION: acpi_mask_gpe 248 * 249 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 250 * gpe_number - GPE level within the GPE block 251 * is_masked - Whether the GPE is masked or not 252 * 253 * RETURN: Status 254 * 255 * DESCRIPTION: Unconditionally mask/unmask the an individual GPE, ex., to 256 * prevent a GPE flooding. 257 * 258 ******************************************************************************/ 259 acpi_status acpi_mask_gpe(acpi_handle gpe_device, u32 gpe_number, u8 is_masked) 260 { 261 struct acpi_gpe_event_info *gpe_event_info; 262 acpi_status status; 263 acpi_cpu_flags flags; 264 265 ACPI_FUNCTION_TRACE(acpi_mask_gpe); 266 267 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 268 269 /* Ensure that we have a valid GPE number */ 270 271 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 272 if (!gpe_event_info) { 273 status = AE_BAD_PARAMETER; 274 goto unlock_and_exit; 275 } 276 277 status = acpi_ev_mask_gpe(gpe_event_info, is_masked); 278 279 unlock_and_exit: 280 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 281 return_ACPI_STATUS(status); 282 } 283 284 ACPI_EXPORT_SYMBOL(acpi_mask_gpe) 285 286 /******************************************************************************* 287 * 288 * FUNCTION: acpi_mark_gpe_for_wake 289 * 290 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 291 * gpe_number - GPE level within the GPE block 292 * 293 * RETURN: Status 294 * 295 * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply 296 * sets the ACPI_GPE_CAN_WAKE flag. 297 * 298 * Some potential callers of acpi_setup_gpe_for_wake may know in advance that 299 * there won't be any notify handlers installed for device wake notifications 300 * from the given GPE (one example is a button GPE in Linux). For these cases, 301 * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake. 302 * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to 303 * setup implicit wake notification for it (since there's no handler method). 304 * 305 ******************************************************************************/ 306 acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number) 307 { 308 struct acpi_gpe_event_info *gpe_event_info; 309 acpi_status status = AE_BAD_PARAMETER; 310 acpi_cpu_flags flags; 311 312 ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake); 313 314 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 315 316 /* Ensure that we have a valid GPE number */ 317 318 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 319 if (gpe_event_info) { 320 321 /* Mark the GPE as a possible wake event */ 322 323 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; 324 status = AE_OK; 325 } 326 327 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 328 return_ACPI_STATUS(status); 329 } 330 331 ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake) 332 333 /******************************************************************************* 334 * 335 * FUNCTION: acpi_setup_gpe_for_wake 336 * 337 * PARAMETERS: wake_device - Device associated with the GPE (via _PRW) 338 * gpe_device - Parent GPE Device. NULL for GPE0/GPE1 339 * gpe_number - GPE level within the GPE block 340 * 341 * RETURN: Status 342 * 343 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This 344 * interface is intended to be used as the host executes the 345 * _PRW methods (Power Resources for Wake) in the system tables. 346 * Each _PRW appears under a Device Object (The wake_device), and 347 * contains the info for the wake GPE associated with the 348 * wake_device. 349 * 350 ******************************************************************************/ 351 acpi_status 352 acpi_setup_gpe_for_wake(acpi_handle wake_device, 353 acpi_handle gpe_device, u32 gpe_number) 354 { 355 acpi_status status; 356 struct acpi_gpe_event_info *gpe_event_info; 357 struct acpi_namespace_node *device_node; 358 struct acpi_gpe_notify_info *notify; 359 struct acpi_gpe_notify_info *new_notify; 360 acpi_cpu_flags flags; 361 362 ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); 363 364 /* Parameter Validation */ 365 366 if (!wake_device) { 367 /* 368 * By forcing wake_device to be valid, we automatically enable the 369 * implicit notify feature on all hosts. 370 */ 371 return_ACPI_STATUS(AE_BAD_PARAMETER); 372 } 373 374 /* Handle root object case */ 375 376 if (wake_device == ACPI_ROOT_OBJECT) { 377 device_node = acpi_gbl_root_node; 378 } else { 379 device_node = 380 ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); 381 } 382 383 /* Validate wake_device is of type Device */ 384 385 if (device_node->type != ACPI_TYPE_DEVICE) { 386 return_ACPI_STATUS (AE_BAD_PARAMETER); 387 } 388 389 /* 390 * Allocate a new notify object up front, in case it is needed. 391 * Memory allocation while holding a spinlock is a big no-no 392 * on some hosts. 393 */ 394 new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info)); 395 if (!new_notify) { 396 return_ACPI_STATUS(AE_NO_MEMORY); 397 } 398 399 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 400 401 /* Ensure that we have a valid GPE number */ 402 403 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 404 if (!gpe_event_info) { 405 status = AE_BAD_PARAMETER; 406 goto unlock_and_exit; 407 } 408 409 /* 410 * If there is no method or handler for this GPE, then the 411 * wake_device will be notified whenever this GPE fires. This is 412 * known as an "implicit notify". Note: The GPE is assumed to be 413 * level-triggered (for windows compatibility). 414 */ 415 if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == 416 ACPI_GPE_DISPATCH_NONE) { 417 /* 418 * This is the first device for implicit notify on this GPE. 419 * Just set the flags here, and enter the NOTIFY block below. 420 */ 421 gpe_event_info->flags = 422 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); 423 } else if (gpe_event_info->flags & ACPI_GPE_AUTO_ENABLED) { 424 /* 425 * A reference to this GPE has been added during the GPE block 426 * initialization, so drop it now to prevent the GPE from being 427 * permanently enabled and clear its ACPI_GPE_AUTO_ENABLED flag. 428 */ 429 (void)acpi_ev_remove_gpe_reference(gpe_event_info); 430 gpe_event_info->flags &= ~ACPI_GPE_AUTO_ENABLED; 431 } 432 433 /* 434 * If we already have an implicit notify on this GPE, add 435 * this device to the notify list. 436 */ 437 if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == 438 ACPI_GPE_DISPATCH_NOTIFY) { 439 440 /* Ensure that the device is not already in the list */ 441 442 notify = gpe_event_info->dispatch.notify_list; 443 while (notify) { 444 if (notify->device_node == device_node) { 445 status = AE_ALREADY_EXISTS; 446 goto unlock_and_exit; 447 } 448 notify = notify->next; 449 } 450 451 /* Add this device to the notify list for this GPE */ 452 453 new_notify->device_node = device_node; 454 new_notify->next = gpe_event_info->dispatch.notify_list; 455 gpe_event_info->dispatch.notify_list = new_notify; 456 new_notify = NULL; 457 } 458 459 /* Mark the GPE as a possible wake event */ 460 461 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; 462 status = AE_OK; 463 464 unlock_and_exit: 465 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 466 467 /* Delete the notify object if it was not used above */ 468 469 if (new_notify) { 470 ACPI_FREE(new_notify); 471 } 472 return_ACPI_STATUS(status); 473 } 474 ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) 475 476 /******************************************************************************* 477 * 478 * FUNCTION: acpi_set_gpe_wake_mask 479 * 480 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 481 * gpe_number - GPE level within the GPE block 482 * action - Enable or Disable 483 * 484 * RETURN: Status 485 * 486 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must 487 * already be marked as a WAKE GPE. 488 * 489 ******************************************************************************/ 490 491 acpi_status 492 acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) 493 { 494 acpi_status status = AE_OK; 495 struct acpi_gpe_event_info *gpe_event_info; 496 struct acpi_gpe_register_info *gpe_register_info; 497 acpi_cpu_flags flags; 498 u32 register_bit; 499 500 ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); 501 502 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 503 504 /* 505 * Ensure that we have a valid GPE number and that this GPE is in 506 * fact a wake GPE 507 */ 508 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 509 if (!gpe_event_info) { 510 status = AE_BAD_PARAMETER; 511 goto unlock_and_exit; 512 } 513 514 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { 515 status = AE_TYPE; 516 goto unlock_and_exit; 517 } 518 519 gpe_register_info = gpe_event_info->register_info; 520 if (!gpe_register_info) { 521 status = AE_NOT_EXIST; 522 goto unlock_and_exit; 523 } 524 525 register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); 526 527 /* Perform the action */ 528 529 switch (action) { 530 case ACPI_GPE_ENABLE: 531 532 ACPI_SET_BIT(gpe_register_info->enable_for_wake, 533 (u8)register_bit); 534 break; 535 536 case ACPI_GPE_DISABLE: 537 538 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, 539 (u8)register_bit); 540 break; 541 542 default: 543 544 ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); 545 status = AE_BAD_PARAMETER; 546 break; 547 } 548 549 unlock_and_exit: 550 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 551 return_ACPI_STATUS(status); 552 } 553 554 ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) 555 556 /******************************************************************************* 557 * 558 * FUNCTION: acpi_clear_gpe 559 * 560 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 561 * gpe_number - GPE level within the GPE block 562 * 563 * RETURN: Status 564 * 565 * DESCRIPTION: Clear an ACPI event (general purpose) 566 * 567 ******************************************************************************/ 568 acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) 569 { 570 acpi_status status = AE_OK; 571 struct acpi_gpe_event_info *gpe_event_info; 572 acpi_cpu_flags flags; 573 574 ACPI_FUNCTION_TRACE(acpi_clear_gpe); 575 576 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 577 578 /* Ensure that we have a valid GPE number */ 579 580 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 581 if (!gpe_event_info) { 582 status = AE_BAD_PARAMETER; 583 goto unlock_and_exit; 584 } 585 586 status = acpi_hw_clear_gpe(gpe_event_info); 587 588 unlock_and_exit: 589 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 590 return_ACPI_STATUS(status); 591 } 592 593 ACPI_EXPORT_SYMBOL(acpi_clear_gpe) 594 595 /******************************************************************************* 596 * 597 * FUNCTION: acpi_get_gpe_status 598 * 599 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 600 * gpe_number - GPE level within the GPE block 601 * event_status - Where the current status of the event 602 * will be returned 603 * 604 * RETURN: Status 605 * 606 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) 607 * 608 ******************************************************************************/ 609 acpi_status 610 acpi_get_gpe_status(acpi_handle gpe_device, 611 u32 gpe_number, acpi_event_status *event_status) 612 { 613 acpi_status status = AE_OK; 614 struct acpi_gpe_event_info *gpe_event_info; 615 acpi_cpu_flags flags; 616 617 ACPI_FUNCTION_TRACE(acpi_get_gpe_status); 618 619 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 620 621 /* Ensure that we have a valid GPE number */ 622 623 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 624 if (!gpe_event_info) { 625 status = AE_BAD_PARAMETER; 626 goto unlock_and_exit; 627 } 628 629 /* Obtain status on the requested GPE number */ 630 631 status = acpi_hw_get_gpe_status(gpe_event_info, event_status); 632 633 unlock_and_exit: 634 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 635 return_ACPI_STATUS(status); 636 } 637 638 ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) 639 640 /******************************************************************************* 641 * 642 * FUNCTION: acpi_gispatch_gpe 643 * 644 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 645 * gpe_number - GPE level within the GPE block 646 * 647 * RETURN: None 648 * 649 * DESCRIPTION: Detect and dispatch a General Purpose Event to either a function 650 * (e.g. EC) or method (e.g. _Lxx/_Exx) handler. 651 * 652 ******************************************************************************/ 653 void acpi_dispatch_gpe(acpi_handle gpe_device, u32 gpe_number) 654 { 655 ACPI_FUNCTION_TRACE(acpi_dispatch_gpe); 656 657 acpi_ev_detect_gpe(gpe_device, NULL, gpe_number); 658 } 659 660 ACPI_EXPORT_SYMBOL(acpi_dispatch_gpe) 661 662 /******************************************************************************* 663 * 664 * FUNCTION: acpi_finish_gpe 665 * 666 * PARAMETERS: gpe_device - Namespace node for the GPE Block 667 * (NULL for FADT defined GPEs) 668 * gpe_number - GPE level within the GPE block 669 * 670 * RETURN: Status 671 * 672 * DESCRIPTION: Clear and conditionally re-enable a GPE. This completes the GPE 673 * processing. Intended for use by asynchronous host-installed 674 * GPE handlers. The GPE is only re-enabled if the enable_for_run bit 675 * is set in the GPE info. 676 * 677 ******************************************************************************/ 678 acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number) 679 { 680 struct acpi_gpe_event_info *gpe_event_info; 681 acpi_status status; 682 acpi_cpu_flags flags; 683 684 ACPI_FUNCTION_TRACE(acpi_finish_gpe); 685 686 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); 687 688 /* Ensure that we have a valid GPE number */ 689 690 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); 691 if (!gpe_event_info) { 692 status = AE_BAD_PARAMETER; 693 goto unlock_and_exit; 694 } 695 696 status = acpi_ev_finish_gpe(gpe_event_info); 697 698 unlock_and_exit: 699 acpi_os_release_lock(acpi_gbl_gpe_lock, flags); 700 return_ACPI_STATUS(status); 701 } 702 703 ACPI_EXPORT_SYMBOL(acpi_finish_gpe) 704 705 /****************************************************************************** 706 * 707 * FUNCTION: acpi_disable_all_gpes 708 * 709 * PARAMETERS: None 710 * 711 * RETURN: Status 712 * 713 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks 714 * 715 ******************************************************************************/ 716 717 acpi_status acpi_disable_all_gpes(void) 718 { 719 acpi_status status; 720 721 ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); 722 723 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); 724 if (ACPI_FAILURE(status)) { 725 return_ACPI_STATUS(status); 726 } 727 728 status = acpi_hw_disable_all_gpes(); 729 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); 730 731 return_ACPI_STATUS(status); 732 } 733 734 ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) 735 736 /****************************************************************************** 737 * 738 * FUNCTION: acpi_enable_all_runtime_gpes 739 * 740 * PARAMETERS: None 741 * 742 * RETURN: Status 743 * 744 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks 745 * 746 ******************************************************************************/ 747 748 acpi_status acpi_enable_all_runtime_gpes(void) 749 { 750 acpi_status status; 751 752 ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); 753 754 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); 755 if (ACPI_FAILURE(status)) { 756 return_ACPI_STATUS(status); 757 } 758 759 status = acpi_hw_enable_all_runtime_gpes(); 760 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); 761 762 return_ACPI_STATUS(status); 763 } 764 765 ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) 766 767 /****************************************************************************** 768 * 769 * FUNCTION: acpi_enable_all_wakeup_gpes 770 * 771 * PARAMETERS: None 772 * 773 * RETURN: Status 774 * 775 * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in 776 * all GPE blocks. 777 * 778 ******************************************************************************/ 779 acpi_status acpi_enable_all_wakeup_gpes(void) 780 { 781 acpi_status status; 782 783 ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes); 784 785 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); 786 if (ACPI_FAILURE(status)) { 787 return_ACPI_STATUS(status); 788 } 789 790 status = acpi_hw_enable_all_wakeup_gpes(); 791 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); 792 793 return_ACPI_STATUS(status); 794 } 795 796 ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes) 797 798 /******************************************************************************* 799 * 800 * FUNCTION: acpi_install_gpe_block 801 * 802 * PARAMETERS: gpe_device - Handle to the parent GPE Block Device 803 * gpe_block_address - Address and space_ID 804 * register_count - Number of GPE register pairs in the block 805 * interrupt_number - H/W interrupt for the block 806 * 807 * RETURN: Status 808 * 809 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not 810 * enabled here. 811 * 812 ******************************************************************************/ 813 acpi_status 814 acpi_install_gpe_block(acpi_handle gpe_device, 815 struct acpi_generic_address *gpe_block_address, 816 u32 register_count, u32 interrupt_number) 817 { 818 acpi_status status; 819 union acpi_operand_object *obj_desc; 820 struct acpi_namespace_node *node; 821 struct acpi_gpe_block_info *gpe_block; 822 823 ACPI_FUNCTION_TRACE(acpi_install_gpe_block); 824 825 if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { 826 return_ACPI_STATUS(AE_BAD_PARAMETER); 827 } 828 829 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); 830 if (ACPI_FAILURE(status)) { 831 return_ACPI_STATUS(status); 832 } 833 834 node = acpi_ns_validate_handle(gpe_device); 835 if (!node) { 836 status = AE_BAD_PARAMETER; 837 goto unlock_and_exit; 838 } 839 840 /* Validate the parent device */ 841 842 if (node->type != ACPI_TYPE_DEVICE) { 843 status = AE_TYPE; 844 goto unlock_and_exit; 845 } 846 847 if (node->object) { 848 status = AE_ALREADY_EXISTS; 849 goto unlock_and_exit; 850 } 851 852 /* 853 * For user-installed GPE Block Devices, the gpe_block_base_number 854 * is always zero 855 */ 856 status = acpi_ev_create_gpe_block(node, gpe_block_address->address, 857 gpe_block_address->space_id, 858 register_count, 0, interrupt_number, 859 &gpe_block); 860 if (ACPI_FAILURE(status)) { 861 goto unlock_and_exit; 862 } 863 864 /* Install block in the device_object attached to the node */ 865 866 obj_desc = acpi_ns_get_attached_object(node); 867 if (!obj_desc) { 868 869 /* 870 * No object, create a new one (Device nodes do not always have 871 * an attached object) 872 */ 873 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); 874 if (!obj_desc) { 875 status = AE_NO_MEMORY; 876 goto unlock_and_exit; 877 } 878 879 status = 880 acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); 881 882 /* Remove local reference to the object */ 883 884 acpi_ut_remove_reference(obj_desc); 885 886 if (ACPI_FAILURE(status)) { 887 goto unlock_and_exit; 888 } 889 } 890 891 /* Now install the GPE block in the device_object */ 892 893 obj_desc->device.gpe_block = gpe_block; 894 895 unlock_and_exit: 896 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); 897 return_ACPI_STATUS(status); 898 } 899 900 ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) 901 902 /******************************************************************************* 903 * 904 * FUNCTION: acpi_remove_gpe_block 905 * 906 * PARAMETERS: gpe_device - Handle to the parent GPE Block Device 907 * 908 * RETURN: Status 909 * 910 * DESCRIPTION: Remove a previously installed block of GPE registers 911 * 912 ******************************************************************************/ 913 acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) 914 { 915 union acpi_operand_object *obj_desc; 916 acpi_status status; 917 struct acpi_namespace_node *node; 918 919 ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); 920 921 if (!gpe_device) { 922 return_ACPI_STATUS(AE_BAD_PARAMETER); 923 } 924 925 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); 926 if (ACPI_FAILURE(status)) { 927 return_ACPI_STATUS(status); 928 } 929 930 node = acpi_ns_validate_handle(gpe_device); 931 if (!node) { 932 status = AE_BAD_PARAMETER; 933 goto unlock_and_exit; 934 } 935 936 /* Validate the parent device */ 937 938 if (node->type != ACPI_TYPE_DEVICE) { 939 status = AE_TYPE; 940 goto unlock_and_exit; 941 } 942 943 /* Get the device_object attached to the node */ 944 945 obj_desc = acpi_ns_get_attached_object(node); 946 if (!obj_desc || !obj_desc->device.gpe_block) { 947 return_ACPI_STATUS(AE_NULL_OBJECT); 948 } 949 950 /* Delete the GPE block (but not the device_object) */ 951 952 status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); 953 if (ACPI_SUCCESS(status)) { 954 obj_desc->device.gpe_block = NULL; 955 } 956 957 unlock_and_exit: 958 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); 959 return_ACPI_STATUS(status); 960 } 961 962 ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) 963 964 /******************************************************************************* 965 * 966 * FUNCTION: acpi_get_gpe_device 967 * 968 * PARAMETERS: index - System GPE index (0-current_gpe_count) 969 * gpe_device - Where the parent GPE Device is returned 970 * 971 * RETURN: Status 972 * 973 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL 974 * gpe device indicates that the gpe number is contained in one of 975 * the FADT-defined gpe blocks. Otherwise, the GPE block device. 976 * 977 ******************************************************************************/ 978 acpi_status acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) 979 { 980 struct acpi_gpe_device_info info; 981 acpi_status status; 982 983 ACPI_FUNCTION_TRACE(acpi_get_gpe_device); 984 985 if (!gpe_device) { 986 return_ACPI_STATUS(AE_BAD_PARAMETER); 987 } 988 989 if (index >= acpi_current_gpe_count) { 990 return_ACPI_STATUS(AE_NOT_EXIST); 991 } 992 993 /* Setup and walk the GPE list */ 994 995 info.index = index; 996 info.status = AE_NOT_EXIST; 997 info.gpe_device = NULL; 998 info.next_block_base_index = 0; 999 1000 status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); 1001 if (ACPI_FAILURE(status)) { 1002 return_ACPI_STATUS(status); 1003 } 1004 1005 *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); 1006 return_ACPI_STATUS(info.status); 1007 } 1008 1009 ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) 1010 #endif /* !ACPI_REDUCED_HARDWARE */ 1011