1 /******************************************************************************
3 * Module Name: evgpeblk - GPE block creation and initialization.
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2005, R. Byron Moore
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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.
44 #include <acpi/acpi.h>
45 #include <acpi/acevents.h>
46 #include <acpi/acnamesp.h>
48 #define _COMPONENT ACPI_EVENTS
49 ACPI_MODULE_NAME ("evgpeblk")
51 /* Local prototypes */
54 acpi_ev_save_method_info (
55 acpi_handle obj_handle
,
61 acpi_ev_match_prw_and_gpe (
62 acpi_handle obj_handle
,
67 static struct acpi_gpe_xrupt_info
*
68 acpi_ev_get_gpe_xrupt_block (
69 u32 interrupt_number
);
72 acpi_ev_delete_gpe_xrupt (
73 struct acpi_gpe_xrupt_info
*gpe_xrupt
);
76 acpi_ev_install_gpe_block (
77 struct acpi_gpe_block_info
*gpe_block
,
78 u32 interrupt_number
);
81 acpi_ev_create_gpe_info_blocks (
82 struct acpi_gpe_block_info
*gpe_block
);
85 /*******************************************************************************
87 * FUNCTION: acpi_ev_valid_gpe_event
89 * PARAMETERS: gpe_event_info - Info for this GPE
91 * RETURN: TRUE if the gpe_event is valid
93 * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
94 * Should be called only when the GPE lists are semaphore locked
95 * and not subject to change.
97 ******************************************************************************/
100 acpi_ev_valid_gpe_event (
101 struct acpi_gpe_event_info
*gpe_event_info
)
103 struct acpi_gpe_xrupt_info
*gpe_xrupt_block
;
104 struct acpi_gpe_block_info
*gpe_block
;
107 ACPI_FUNCTION_ENTRY ();
110 /* No need for spin lock since we are not changing any list elements */
112 /* Walk the GPE interrupt levels */
114 gpe_xrupt_block
= acpi_gbl_gpe_xrupt_list_head
;
115 while (gpe_xrupt_block
) {
116 gpe_block
= gpe_xrupt_block
->gpe_block_list_head
;
118 /* Walk the GPE blocks on this interrupt level */
121 if ((&gpe_block
->event_info
[0] <= gpe_event_info
) &&
122 (&gpe_block
->event_info
[((acpi_size
) gpe_block
->register_count
) * 8] > gpe_event_info
)) {
126 gpe_block
= gpe_block
->next
;
129 gpe_xrupt_block
= gpe_xrupt_block
->next
;
136 /*******************************************************************************
138 * FUNCTION: acpi_ev_walk_gpe_list
140 * PARAMETERS: gpe_walk_callback - Routine called for each GPE block
144 * DESCRIPTION: Walk the GPE lists.
146 ******************************************************************************/
149 acpi_ev_walk_gpe_list (
150 ACPI_GPE_CALLBACK gpe_walk_callback
)
152 struct acpi_gpe_block_info
*gpe_block
;
153 struct acpi_gpe_xrupt_info
*gpe_xrupt_info
;
154 acpi_status status
= AE_OK
;
158 ACPI_FUNCTION_TRACE ("ev_walk_gpe_list");
161 flags
= acpi_os_acquire_lock (acpi_gbl_gpe_lock
);
163 /* Walk the interrupt level descriptor list */
165 gpe_xrupt_info
= acpi_gbl_gpe_xrupt_list_head
;
166 while (gpe_xrupt_info
) {
167 /* Walk all Gpe Blocks attached to this interrupt level */
169 gpe_block
= gpe_xrupt_info
->gpe_block_list_head
;
171 /* One callback per GPE block */
173 status
= gpe_walk_callback (gpe_xrupt_info
, gpe_block
);
174 if (ACPI_FAILURE (status
)) {
175 goto unlock_and_exit
;
178 gpe_block
= gpe_block
->next
;
181 gpe_xrupt_info
= gpe_xrupt_info
->next
;
185 acpi_os_release_lock (acpi_gbl_gpe_lock
, flags
);
186 return_ACPI_STATUS (status
);
190 /*******************************************************************************
192 * FUNCTION: acpi_ev_delete_gpe_handlers
194 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
195 * gpe_block - Gpe Block info
199 * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
200 * Used only prior to termination.
202 ******************************************************************************/
205 acpi_ev_delete_gpe_handlers (
206 struct acpi_gpe_xrupt_info
*gpe_xrupt_info
,
207 struct acpi_gpe_block_info
*gpe_block
)
209 struct acpi_gpe_event_info
*gpe_event_info
;
214 ACPI_FUNCTION_TRACE ("ev_delete_gpe_handlers");
217 /* Examine each GPE Register within the block */
219 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
220 /* Now look at the individual GPEs in this byte register */
222 for (j
= 0; j
< ACPI_GPE_REGISTER_WIDTH
; j
++) {
223 gpe_event_info
= &gpe_block
->event_info
[(i
* ACPI_GPE_REGISTER_WIDTH
) + j
];
225 if ((gpe_event_info
->flags
& ACPI_GPE_DISPATCH_MASK
) ==
226 ACPI_GPE_DISPATCH_HANDLER
) {
227 ACPI_MEM_FREE (gpe_event_info
->dispatch
.handler
);
228 gpe_event_info
->dispatch
.handler
= NULL
;
229 gpe_event_info
->flags
&= ~ACPI_GPE_DISPATCH_MASK
;
234 return_ACPI_STATUS (AE_OK
);
238 /*******************************************************************************
240 * FUNCTION: acpi_ev_save_method_info
242 * PARAMETERS: Callback from walk_namespace
246 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
247 * control method under the _GPE portion of the namespace.
248 * Extract the name and GPE type from the object, saving this
249 * information for quick lookup during GPE dispatch
251 * The name of each GPE control method is of the form:
254 * L - means that the GPE is level triggered
255 * E - means that the GPE is edge triggered
256 * xx - is the GPE number [in HEX]
258 ******************************************************************************/
261 acpi_ev_save_method_info (
262 acpi_handle obj_handle
,
267 struct acpi_gpe_block_info
*gpe_block
= (void *) obj_desc
;
268 struct acpi_gpe_event_info
*gpe_event_info
;
270 char name
[ACPI_NAME_SIZE
+ 1];
275 ACPI_FUNCTION_TRACE ("ev_save_method_info");
279 * _Lxx and _Exx GPE method support
281 * 1) Extract the name from the object and convert to a string
283 ACPI_MOVE_32_TO_32 (name
,
284 &((struct acpi_namespace_node
*) obj_handle
)->name
.integer
);
285 name
[ACPI_NAME_SIZE
] = 0;
288 * 2) Edge/Level determination is based on the 2nd character
291 * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE
292 * if a _PRW object is found that points to this GPE.
296 type
= ACPI_GPE_LEVEL_TRIGGERED
;
300 type
= ACPI_GPE_EDGE_TRIGGERED
;
304 /* Unknown method type, just ignore it! */
306 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR
,
307 "Unknown GPE method type: %s (name not of form _Lxx or _Exx)\n",
309 return_ACPI_STATUS (AE_OK
);
312 /* Convert the last two characters of the name to the GPE Number */
314 gpe_number
= ACPI_STRTOUL (&name
[2], NULL
, 16);
315 if (gpe_number
== ACPI_UINT32_MAX
) {
316 /* Conversion failed; invalid method, just ignore it */
318 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR
,
319 "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)\n",
321 return_ACPI_STATUS (AE_OK
);
324 /* Ensure that we have a valid GPE number for this GPE block */
326 if ((gpe_number
< gpe_block
->block_base_number
) ||
327 (gpe_number
>= (gpe_block
->block_base_number
+ (gpe_block
->register_count
* 8)))) {
329 * Not valid for this GPE block, just ignore it
330 * However, it may be valid for a different GPE block, since GPE0 and GPE1
331 * methods both appear under \_GPE.
333 return_ACPI_STATUS (AE_OK
);
337 * Now we can add this information to the gpe_event_info block
338 * for use during dispatch of this GPE. Default type is RUNTIME, although
339 * this may change when the _PRW methods are executed later.
341 gpe_event_info
= &gpe_block
->event_info
[gpe_number
- gpe_block
->block_base_number
];
343 gpe_event_info
->flags
= (u8
) (type
| ACPI_GPE_DISPATCH_METHOD
|
344 ACPI_GPE_TYPE_RUNTIME
);
346 gpe_event_info
->dispatch
.method_node
= (struct acpi_namespace_node
*) obj_handle
;
348 /* Update enable mask, but don't enable the HW GPE as of yet */
350 status
= acpi_ev_enable_gpe (gpe_event_info
, FALSE
);
352 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD
,
353 "Registered GPE method %s as GPE number 0x%.2X\n",
355 return_ACPI_STATUS (status
);
359 /*******************************************************************************
361 * FUNCTION: acpi_ev_match_prw_and_gpe
363 * PARAMETERS: Callback from walk_namespace
365 * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is
366 * not aborted on a single _PRW failure.
368 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
369 * Device. Run the _PRW method. If present, extract the GPE
370 * number and mark the GPE as a WAKE GPE.
372 ******************************************************************************/
375 acpi_ev_match_prw_and_gpe (
376 acpi_handle obj_handle
,
381 struct acpi_gpe_walk_info
*gpe_info
= (void *) info
;
382 struct acpi_namespace_node
*gpe_device
;
383 struct acpi_gpe_block_info
*gpe_block
;
384 struct acpi_namespace_node
*target_gpe_device
;
385 struct acpi_gpe_event_info
*gpe_event_info
;
386 union acpi_operand_object
*pkg_desc
;
387 union acpi_operand_object
*obj_desc
;
392 ACPI_FUNCTION_TRACE ("ev_match_prw_and_gpe");
395 /* Check for a _PRW method under this device */
397 status
= acpi_ut_evaluate_object (obj_handle
, METHOD_NAME__PRW
,
398 ACPI_BTYPE_PACKAGE
, &pkg_desc
);
399 if (ACPI_FAILURE (status
)) {
400 /* Ignore all errors from _PRW, we don't want to abort the subsystem */
402 return_ACPI_STATUS (AE_OK
);
405 /* The returned _PRW package must have at least two elements */
407 if (pkg_desc
->package
.count
< 2) {
411 /* Extract pointers from the input context */
413 gpe_device
= gpe_info
->gpe_device
;
414 gpe_block
= gpe_info
->gpe_block
;
417 * The _PRW object must return a package, we are only interested
418 * in the first element
420 obj_desc
= pkg_desc
->package
.elements
[0];
422 if (ACPI_GET_OBJECT_TYPE (obj_desc
) == ACPI_TYPE_INTEGER
) {
423 /* Use FADT-defined GPE device (from definition of _PRW) */
425 target_gpe_device
= acpi_gbl_fadt_gpe_device
;
427 /* Integer is the GPE number in the FADT described GPE blocks */
429 gpe_number
= (u32
) obj_desc
->integer
.value
;
431 else if (ACPI_GET_OBJECT_TYPE (obj_desc
) == ACPI_TYPE_PACKAGE
) {
432 /* Package contains a GPE reference and GPE number within a GPE block */
434 if ((obj_desc
->package
.count
< 2) ||
435 (ACPI_GET_OBJECT_TYPE (obj_desc
->package
.elements
[0]) != ACPI_TYPE_LOCAL_REFERENCE
) ||
436 (ACPI_GET_OBJECT_TYPE (obj_desc
->package
.elements
[1]) != ACPI_TYPE_INTEGER
)) {
440 /* Get GPE block reference and decode */
442 target_gpe_device
= obj_desc
->package
.elements
[0]->reference
.node
;
443 gpe_number
= (u32
) obj_desc
->package
.elements
[1]->integer
.value
;
446 /* Unknown type, just ignore it */
452 * Is this GPE within this block?
454 * TRUE iff these conditions are true:
455 * 1) The GPE devices match.
456 * 2) The GPE index(number) is within the range of the Gpe Block
457 * associated with the GPE device.
459 if ((gpe_device
== target_gpe_device
) &&
460 (gpe_number
>= gpe_block
->block_base_number
) &&
461 (gpe_number
< gpe_block
->block_base_number
+ (gpe_block
->register_count
* 8))) {
462 gpe_event_info
= &gpe_block
->event_info
[gpe_number
- gpe_block
->block_base_number
];
464 /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */
466 gpe_event_info
->flags
&= ~(ACPI_GPE_WAKE_ENABLED
| ACPI_GPE_RUN_ENABLED
);
467 status
= acpi_ev_set_gpe_type (gpe_event_info
, ACPI_GPE_TYPE_WAKE
);
468 if (ACPI_FAILURE (status
)) {
471 status
= acpi_ev_update_gpe_enable_masks (gpe_event_info
, ACPI_GPE_DISABLE
);
475 acpi_ut_remove_reference (pkg_desc
);
476 return_ACPI_STATUS (AE_OK
);
480 /*******************************************************************************
482 * FUNCTION: acpi_ev_get_gpe_xrupt_block
484 * PARAMETERS: interrupt_number - Interrupt for a GPE block
486 * RETURN: A GPE interrupt block
488 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
489 * block per unique interrupt level used for GPEs.
490 * Should be called only when the GPE lists are semaphore locked
491 * and not subject to change.
493 ******************************************************************************/
495 static struct acpi_gpe_xrupt_info
*
496 acpi_ev_get_gpe_xrupt_block (
497 u32 interrupt_number
)
499 struct acpi_gpe_xrupt_info
*next_gpe_xrupt
;
500 struct acpi_gpe_xrupt_info
*gpe_xrupt
;
505 ACPI_FUNCTION_TRACE ("ev_get_gpe_xrupt_block");
508 /* No need for lock since we are not changing any list elements here */
510 next_gpe_xrupt
= acpi_gbl_gpe_xrupt_list_head
;
511 while (next_gpe_xrupt
) {
512 if (next_gpe_xrupt
->interrupt_number
== interrupt_number
) {
513 return_PTR (next_gpe_xrupt
);
516 next_gpe_xrupt
= next_gpe_xrupt
->next
;
519 /* Not found, must allocate a new xrupt descriptor */
521 gpe_xrupt
= ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_xrupt_info
));
526 gpe_xrupt
->interrupt_number
= interrupt_number
;
528 /* Install new interrupt descriptor with spin lock */
530 flags
= acpi_os_acquire_lock (acpi_gbl_gpe_lock
);
531 if (acpi_gbl_gpe_xrupt_list_head
) {
532 next_gpe_xrupt
= acpi_gbl_gpe_xrupt_list_head
;
533 while (next_gpe_xrupt
->next
) {
534 next_gpe_xrupt
= next_gpe_xrupt
->next
;
537 next_gpe_xrupt
->next
= gpe_xrupt
;
538 gpe_xrupt
->previous
= next_gpe_xrupt
;
541 acpi_gbl_gpe_xrupt_list_head
= gpe_xrupt
;
543 acpi_os_release_lock (acpi_gbl_gpe_lock
, flags
);
545 /* Install new interrupt handler if not SCI_INT */
547 if (interrupt_number
!= acpi_gbl_FADT
->sci_int
) {
548 status
= acpi_os_install_interrupt_handler (interrupt_number
,
549 acpi_ev_gpe_xrupt_handler
, gpe_xrupt
);
550 if (ACPI_FAILURE (status
)) {
551 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR
,
552 "Could not install GPE interrupt handler at level 0x%X\n",
558 return_PTR (gpe_xrupt
);
562 /*******************************************************************************
564 * FUNCTION: acpi_ev_delete_gpe_xrupt
566 * PARAMETERS: gpe_xrupt - A GPE interrupt info block
570 * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
571 * interrupt handler if not the SCI interrupt.
573 ******************************************************************************/
576 acpi_ev_delete_gpe_xrupt (
577 struct acpi_gpe_xrupt_info
*gpe_xrupt
)
583 ACPI_FUNCTION_TRACE ("ev_delete_gpe_xrupt");
586 /* We never want to remove the SCI interrupt handler */
588 if (gpe_xrupt
->interrupt_number
== acpi_gbl_FADT
->sci_int
) {
589 gpe_xrupt
->gpe_block_list_head
= NULL
;
590 return_ACPI_STATUS (AE_OK
);
593 /* Disable this interrupt */
595 status
= acpi_os_remove_interrupt_handler (gpe_xrupt
->interrupt_number
,
596 acpi_ev_gpe_xrupt_handler
);
597 if (ACPI_FAILURE (status
)) {
598 return_ACPI_STATUS (status
);
601 /* Unlink the interrupt block with lock */
603 flags
= acpi_os_acquire_lock (acpi_gbl_gpe_lock
);
604 if (gpe_xrupt
->previous
) {
605 gpe_xrupt
->previous
->next
= gpe_xrupt
->next
;
608 if (gpe_xrupt
->next
) {
609 gpe_xrupt
->next
->previous
= gpe_xrupt
->previous
;
611 acpi_os_release_lock (acpi_gbl_gpe_lock
, flags
);
615 ACPI_MEM_FREE (gpe_xrupt
);
616 return_ACPI_STATUS (AE_OK
);
620 /*******************************************************************************
622 * FUNCTION: acpi_ev_install_gpe_block
624 * PARAMETERS: gpe_block - New GPE block
625 * interrupt_number - Xrupt to be associated with this GPE block
629 * DESCRIPTION: Install new GPE block with mutex support
631 ******************************************************************************/
634 acpi_ev_install_gpe_block (
635 struct acpi_gpe_block_info
*gpe_block
,
636 u32 interrupt_number
)
638 struct acpi_gpe_block_info
*next_gpe_block
;
639 struct acpi_gpe_xrupt_info
*gpe_xrupt_block
;
644 ACPI_FUNCTION_TRACE ("ev_install_gpe_block");
647 status
= acpi_ut_acquire_mutex (ACPI_MTX_EVENTS
);
648 if (ACPI_FAILURE (status
)) {
649 return_ACPI_STATUS (status
);
652 gpe_xrupt_block
= acpi_ev_get_gpe_xrupt_block (interrupt_number
);
653 if (!gpe_xrupt_block
) {
654 status
= AE_NO_MEMORY
;
655 goto unlock_and_exit
;
658 /* Install the new block at the end of the list with lock */
660 flags
= acpi_os_acquire_lock (acpi_gbl_gpe_lock
);
661 if (gpe_xrupt_block
->gpe_block_list_head
) {
662 next_gpe_block
= gpe_xrupt_block
->gpe_block_list_head
;
663 while (next_gpe_block
->next
) {
664 next_gpe_block
= next_gpe_block
->next
;
667 next_gpe_block
->next
= gpe_block
;
668 gpe_block
->previous
= next_gpe_block
;
671 gpe_xrupt_block
->gpe_block_list_head
= gpe_block
;
674 gpe_block
->xrupt_block
= gpe_xrupt_block
;
675 acpi_os_release_lock (acpi_gbl_gpe_lock
, flags
);
678 status
= acpi_ut_release_mutex (ACPI_MTX_EVENTS
);
679 return_ACPI_STATUS (status
);
683 /*******************************************************************************
685 * FUNCTION: acpi_ev_delete_gpe_block
687 * PARAMETERS: gpe_block - Existing GPE block
691 * DESCRIPTION: Remove a GPE block
693 ******************************************************************************/
696 acpi_ev_delete_gpe_block (
697 struct acpi_gpe_block_info
*gpe_block
)
703 ACPI_FUNCTION_TRACE ("ev_install_gpe_block");
706 status
= acpi_ut_acquire_mutex (ACPI_MTX_EVENTS
);
707 if (ACPI_FAILURE (status
)) {
708 return_ACPI_STATUS (status
);
711 /* Disable all GPEs in this block */
713 status
= acpi_hw_disable_gpe_block (gpe_block
->xrupt_block
, gpe_block
);
715 if (!gpe_block
->previous
&& !gpe_block
->next
) {
716 /* This is the last gpe_block on this interrupt */
718 status
= acpi_ev_delete_gpe_xrupt (gpe_block
->xrupt_block
);
719 if (ACPI_FAILURE (status
)) {
720 goto unlock_and_exit
;
724 /* Remove the block on this interrupt with lock */
726 flags
= acpi_os_acquire_lock (acpi_gbl_gpe_lock
);
727 if (gpe_block
->previous
) {
728 gpe_block
->previous
->next
= gpe_block
->next
;
731 gpe_block
->xrupt_block
->gpe_block_list_head
= gpe_block
->next
;
734 if (gpe_block
->next
) {
735 gpe_block
->next
->previous
= gpe_block
->previous
;
737 acpi_os_release_lock (acpi_gbl_gpe_lock
, flags
);
740 /* Free the gpe_block */
742 ACPI_MEM_FREE (gpe_block
->register_info
);
743 ACPI_MEM_FREE (gpe_block
->event_info
);
744 ACPI_MEM_FREE (gpe_block
);
747 status
= acpi_ut_release_mutex (ACPI_MTX_EVENTS
);
748 return_ACPI_STATUS (status
);
752 /*******************************************************************************
754 * FUNCTION: acpi_ev_create_gpe_info_blocks
756 * PARAMETERS: gpe_block - New GPE block
760 * DESCRIPTION: Create the register_info and event_info blocks for this GPE block
762 ******************************************************************************/
765 acpi_ev_create_gpe_info_blocks (
766 struct acpi_gpe_block_info
*gpe_block
)
768 struct acpi_gpe_register_info
*gpe_register_info
= NULL
;
769 struct acpi_gpe_event_info
*gpe_event_info
= NULL
;
770 struct acpi_gpe_event_info
*this_event
;
771 struct acpi_gpe_register_info
*this_register
;
777 ACPI_FUNCTION_TRACE ("ev_create_gpe_info_blocks");
780 /* Allocate the GPE register information block */
782 gpe_register_info
= ACPI_MEM_CALLOCATE (
783 (acpi_size
) gpe_block
->register_count
*
784 sizeof (struct acpi_gpe_register_info
));
785 if (!gpe_register_info
) {
786 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR
,
787 "Could not allocate the gpe_register_info table\n"));
788 return_ACPI_STATUS (AE_NO_MEMORY
);
792 * Allocate the GPE event_info block. There are eight distinct GPEs
793 * per register. Initialization to zeros is sufficient.
795 gpe_event_info
= ACPI_MEM_CALLOCATE (
796 ((acpi_size
) gpe_block
->register_count
*
797 ACPI_GPE_REGISTER_WIDTH
) *
798 sizeof (struct acpi_gpe_event_info
));
799 if (!gpe_event_info
) {
800 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR
,
801 "Could not allocate the gpe_event_info table\n"));
802 status
= AE_NO_MEMORY
;
806 /* Save the new Info arrays in the GPE block */
808 gpe_block
->register_info
= gpe_register_info
;
809 gpe_block
->event_info
= gpe_event_info
;
812 * Initialize the GPE Register and Event structures. A goal of these
813 * tables is to hide the fact that there are two separate GPE register sets
814 * in a given gpe hardware block, the status registers occupy the first half,
815 * and the enable registers occupy the second half.
817 this_register
= gpe_register_info
;
818 this_event
= gpe_event_info
;
820 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
821 /* Init the register_info for this GPE register (8 GPEs) */
823 this_register
->base_gpe_number
= (u8
) (gpe_block
->block_base_number
+
824 (i
* ACPI_GPE_REGISTER_WIDTH
));
826 ACPI_STORE_ADDRESS (this_register
->status_address
.address
,
827 (gpe_block
->block_address
.address
830 ACPI_STORE_ADDRESS (this_register
->enable_address
.address
,
831 (gpe_block
->block_address
.address
833 + gpe_block
->register_count
));
835 this_register
->status_address
.address_space_id
= gpe_block
->block_address
.address_space_id
;
836 this_register
->enable_address
.address_space_id
= gpe_block
->block_address
.address_space_id
;
837 this_register
->status_address
.register_bit_width
= ACPI_GPE_REGISTER_WIDTH
;
838 this_register
->enable_address
.register_bit_width
= ACPI_GPE_REGISTER_WIDTH
;
839 this_register
->status_address
.register_bit_offset
= ACPI_GPE_REGISTER_WIDTH
;
840 this_register
->enable_address
.register_bit_offset
= ACPI_GPE_REGISTER_WIDTH
;
842 /* Init the event_info for each GPE within this register */
844 for (j
= 0; j
< ACPI_GPE_REGISTER_WIDTH
; j
++) {
845 this_event
->register_bit
= acpi_gbl_decode_to8bit
[j
];
846 this_event
->register_info
= this_register
;
851 * Clear the status/enable registers. Note that status registers
852 * are cleared by writing a '1', while enable registers are cleared
855 status
= acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH
, 0x00,
856 &this_register
->enable_address
);
857 if (ACPI_FAILURE (status
)) {
861 status
= acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH
, 0xFF,
862 &this_register
->status_address
);
863 if (ACPI_FAILURE (status
)) {
870 return_ACPI_STATUS (AE_OK
);
874 if (gpe_register_info
) {
875 ACPI_MEM_FREE (gpe_register_info
);
877 if (gpe_event_info
) {
878 ACPI_MEM_FREE (gpe_event_info
);
881 return_ACPI_STATUS (status
);
885 /*******************************************************************************
887 * FUNCTION: acpi_ev_create_gpe_block
889 * PARAMETERS: gpe_device - Handle to the parent GPE block
890 * gpe_block_address - Address and space_iD
891 * register_count - Number of GPE register pairs in the block
892 * gpe_block_base_number - Starting GPE number for the block
893 * interrupt_number - H/W interrupt for the block
894 * return_gpe_block - Where the new block descriptor is returned
898 * DESCRIPTION: Create and Install a block of GPE registers
900 ******************************************************************************/
903 acpi_ev_create_gpe_block (
904 struct acpi_namespace_node
*gpe_device
,
905 struct acpi_generic_address
*gpe_block_address
,
907 u8 gpe_block_base_number
,
908 u32 interrupt_number
,
909 struct acpi_gpe_block_info
**return_gpe_block
)
911 struct acpi_gpe_block_info
*gpe_block
;
912 struct acpi_gpe_event_info
*gpe_event_info
;
916 u32 gpe_enabled_count
;
918 struct acpi_gpe_walk_info gpe_info
;
921 ACPI_FUNCTION_TRACE ("ev_create_gpe_block");
924 if (!register_count
) {
925 return_ACPI_STATUS (AE_OK
);
928 /* Allocate a new GPE block */
930 gpe_block
= ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_block_info
));
932 return_ACPI_STATUS (AE_NO_MEMORY
);
935 /* Initialize the new GPE block */
937 gpe_block
->register_count
= register_count
;
938 gpe_block
->block_base_number
= gpe_block_base_number
;
939 gpe_block
->node
= gpe_device
;
941 ACPI_MEMCPY (&gpe_block
->block_address
, gpe_block_address
,
942 sizeof (struct acpi_generic_address
));
944 /* Create the register_info and event_info sub-structures */
946 status
= acpi_ev_create_gpe_info_blocks (gpe_block
);
947 if (ACPI_FAILURE (status
)) {
948 ACPI_MEM_FREE (gpe_block
);
949 return_ACPI_STATUS (status
);
952 /* Install the new block in the global list(s) */
954 status
= acpi_ev_install_gpe_block (gpe_block
, interrupt_number
);
955 if (ACPI_FAILURE (status
)) {
956 ACPI_MEM_FREE (gpe_block
);
957 return_ACPI_STATUS (status
);
960 /* Find all GPE methods (_Lxx, _Exx) for this block */
962 status
= acpi_ns_walk_namespace (ACPI_TYPE_METHOD
, gpe_device
,
963 ACPI_UINT32_MAX
, ACPI_NS_WALK_NO_UNLOCK
, acpi_ev_save_method_info
,
967 * Runtime option: Should Wake GPEs be enabled at runtime? The default
968 * is No, they should only be enabled just as the machine goes to sleep.
970 if (acpi_gbl_leave_wake_gpes_disabled
) {
972 * Differentiate RUNTIME vs WAKE GPEs, via the _PRW control methods.
973 * (Each GPE that has one or more _PRWs that reference it is by
974 * definition a WAKE GPE and will not be enabled while the machine
977 gpe_info
.gpe_block
= gpe_block
;
978 gpe_info
.gpe_device
= gpe_device
;
980 status
= acpi_ns_walk_namespace (ACPI_TYPE_DEVICE
, ACPI_ROOT_OBJECT
,
981 ACPI_UINT32_MAX
, ACPI_NS_WALK_UNLOCK
, acpi_ev_match_prw_and_gpe
,
986 * Enable all GPEs in this block that are 1) "runtime" or "run/wake" GPEs,
987 * and 2) have a corresponding _Lxx or _Exx method. All other GPEs must
988 * be enabled via the acpi_enable_gpe() external interface.
991 gpe_enabled_count
= 0;
993 for (i
= 0; i
< gpe_block
->register_count
; i
++) {
994 for (j
= 0; j
< 8; j
++) {
995 /* Get the info block for this particular GPE */
997 gpe_event_info
= &gpe_block
->event_info
[(i
* ACPI_GPE_REGISTER_WIDTH
) + j
];
999 if (((gpe_event_info
->flags
& ACPI_GPE_DISPATCH_MASK
) == ACPI_GPE_DISPATCH_METHOD
) &&
1000 (gpe_event_info
->flags
& ACPI_GPE_TYPE_RUNTIME
)) {
1001 gpe_enabled_count
++;
1004 if (gpe_event_info
->flags
& ACPI_GPE_TYPE_WAKE
) {
1010 /* Dump info about this GPE block */
1012 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
,
1013 "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
1014 (u32
) gpe_block
->block_base_number
,
1015 (u32
) (gpe_block
->block_base_number
+
1016 ((gpe_block
->register_count
* ACPI_GPE_REGISTER_WIDTH
) -1)),
1017 gpe_device
->name
.ascii
,
1018 gpe_block
->register_count
,
1021 /* Enable all valid GPEs found above */
1023 status
= acpi_hw_enable_runtime_gpe_block (NULL
, gpe_block
);
1025 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
,
1026 "Found %u Wake, Enabled %u Runtime GPEs in this block\n",
1027 wake_gpe_count
, gpe_enabled_count
));
1029 /* Return the new block */
1031 if (return_gpe_block
) {
1032 (*return_gpe_block
) = gpe_block
;
1035 return_ACPI_STATUS (AE_OK
);
1039 /*******************************************************************************
1041 * FUNCTION: acpi_ev_gpe_initialize
1047 * DESCRIPTION: Initialize the GPE data structures
1049 ******************************************************************************/
1052 acpi_ev_gpe_initialize (
1055 u32 register_count0
= 0;
1056 u32 register_count1
= 0;
1057 u32 gpe_number_max
= 0;
1061 ACPI_FUNCTION_TRACE ("ev_gpe_initialize");
1064 status
= acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE
);
1065 if (ACPI_FAILURE (status
)) {
1066 return_ACPI_STATUS (status
);
1070 * Initialize the GPE Block(s) defined in the FADT
1072 * Why the GPE register block lengths are divided by 2: From the ACPI Spec,
1073 * section "General-Purpose Event Registers", we have:
1075 * "Each register block contains two registers of equal length
1076 * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
1077 * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
1078 * The length of the GPE1_STS and GPE1_EN registers is equal to
1079 * half the GPE1_LEN. If a generic register block is not supported
1080 * then its respective block pointer and block length values in the
1081 * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
1082 * to be the same size."
1086 * Determine the maximum GPE number for this machine.
1088 * Note: both GPE0 and GPE1 are optional, and either can exist without
1091 * If EITHER the register length OR the block address are zero, then that
1092 * particular block is not supported.
1094 if (acpi_gbl_FADT
->gpe0_blk_len
&&
1095 acpi_gbl_FADT
->xgpe0_blk
.address
) {
1096 /* GPE block 0 exists (has both length and address > 0) */
1098 register_count0
= (u16
) (acpi_gbl_FADT
->gpe0_blk_len
/ 2);
1100 gpe_number_max
= (register_count0
* ACPI_GPE_REGISTER_WIDTH
) - 1;
1102 /* Install GPE Block 0 */
1104 status
= acpi_ev_create_gpe_block (acpi_gbl_fadt_gpe_device
,
1105 &acpi_gbl_FADT
->xgpe0_blk
, register_count0
, 0,
1106 acpi_gbl_FADT
->sci_int
, &acpi_gbl_gpe_fadt_blocks
[0]);
1108 if (ACPI_FAILURE (status
)) {
1109 ACPI_REPORT_ERROR ((
1110 "Could not create GPE Block 0, %s\n",
1111 acpi_format_exception (status
)));
1115 if (acpi_gbl_FADT
->gpe1_blk_len
&&
1116 acpi_gbl_FADT
->xgpe1_blk
.address
) {
1117 /* GPE block 1 exists (has both length and address > 0) */
1119 register_count1
= (u16
) (acpi_gbl_FADT
->gpe1_blk_len
/ 2);
1121 /* Check for GPE0/GPE1 overlap (if both banks exist) */
1123 if ((register_count0
) &&
1124 (gpe_number_max
>= acpi_gbl_FADT
->gpe1_base
)) {
1125 ACPI_REPORT_ERROR ((
1126 "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1\n",
1127 gpe_number_max
, acpi_gbl_FADT
->gpe1_base
,
1128 acpi_gbl_FADT
->gpe1_base
+
1129 ((register_count1
* ACPI_GPE_REGISTER_WIDTH
) - 1)));
1131 /* Ignore GPE1 block by setting the register count to zero */
1133 register_count1
= 0;
1136 /* Install GPE Block 1 */
1138 status
= acpi_ev_create_gpe_block (acpi_gbl_fadt_gpe_device
,
1139 &acpi_gbl_FADT
->xgpe1_blk
, register_count1
,
1140 acpi_gbl_FADT
->gpe1_base
,
1141 acpi_gbl_FADT
->sci_int
, &acpi_gbl_gpe_fadt_blocks
[1]);
1143 if (ACPI_FAILURE (status
)) {
1144 ACPI_REPORT_ERROR ((
1145 "Could not create GPE Block 1, %s\n",
1146 acpi_format_exception (status
)));
1150 * GPE0 and GPE1 do not have to be contiguous in the GPE number
1151 * space. However, GPE0 always starts at GPE number zero.
1153 gpe_number_max
= acpi_gbl_FADT
->gpe1_base
+
1154 ((register_count1
* ACPI_GPE_REGISTER_WIDTH
) - 1);
1158 /* Exit if there are no GPE registers */
1160 if ((register_count0
+ register_count1
) == 0) {
1161 /* GPEs are not required by ACPI, this is OK */
1163 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
,
1164 "There are no GPE blocks defined in the FADT\n"));
1169 /* Check for Max GPE number out-of-range */
1171 if (gpe_number_max
> ACPI_GPE_MAX
) {
1172 ACPI_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n",
1174 status
= AE_BAD_VALUE
;
1179 (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE
);
1180 return_ACPI_STATUS (AE_OK
);