aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/evregion.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-09 14:55:14 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-09 14:55:14 -0500
commita3a798c88a14b35e5d4ca30716dbc9eb9a1ddfe2 (patch)
tree393969a0f1405237483c8c29b904690f2bb90559 /drivers/acpi/acpica/evregion.c
parentefcb3cf7f00c3c424db012380a8a974c2676a3c8 (diff)
parentd97c0defba25a959a990f6d4759f43075540832e (diff)
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (94 commits) ACPICA: hide private headers ACPICA: create acpica/ directory ACPI: fix build warning ACPI : Use RSDT instead of XSDT by adding boot option of "acpi=rsdt" ACPI: Avoid array address overflow when _CST MWAIT hint bits are set fujitsu-laptop: Simplify SBLL/SBL2 backlight handling fujitsu-laptop: Add BL power, LED control and radio state information ACPICA: delete utcache.c ACPICA: delete acdisasm.h ACPICA: Update version to 20081204. ACPICA: FADT: Update error msgs for consistency ACPICA: FADT: set acpi_gbl_use_default_register_widths to TRUE by default ACPICA: FADT parsing changes and fixes ACPICA: Add ACPI_MUTEX_TYPE configuration option ACPICA: Fixes for various ACPI data tables ACPICA: Restructure includes into public/private ACPI: remove private acpica headers from driver files ACPI: reboot.c: use new acpi_reset interface ACPICA: New: acpi_reset interface - write to reset register ACPICA: Move all public H/W interfaces to new hwxface ...
Diffstat (limited to 'drivers/acpi/acpica/evregion.c')
-rw-r--r--drivers/acpi/acpica/evregion.c1070
1 files changed, 1070 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c
new file mode 100644
index 000000000000..665c0887ab4d
--- /dev/null
+++ b/drivers/acpi/acpica/evregion.c
@@ -0,0 +1,1070 @@
1/******************************************************************************
2 *
3 * Module Name: evregion - ACPI address_space (op_region) handler dispatch
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2008, 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/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
48#include "acinterp.h"
49
50#define _COMPONENT ACPI_EVENTS
51ACPI_MODULE_NAME("evregion")
52
53/* Local prototypes */
54static acpi_status
55acpi_ev_reg_run(acpi_handle obj_handle,
56 u32 level, void *context, void **return_value);
57
58static acpi_status
59acpi_ev_install_handler(acpi_handle obj_handle,
60 u32 level, void *context, void **return_value);
61
62/* These are the address spaces that will get default handlers */
63
64#define ACPI_NUM_DEFAULT_SPACES 4
65
66static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = {
67 ACPI_ADR_SPACE_SYSTEM_MEMORY,
68 ACPI_ADR_SPACE_SYSTEM_IO,
69 ACPI_ADR_SPACE_PCI_CONFIG,
70 ACPI_ADR_SPACE_DATA_TABLE
71};
72
73/*******************************************************************************
74 *
75 * FUNCTION: acpi_ev_install_region_handlers
76 *
77 * PARAMETERS: None
78 *
79 * RETURN: Status
80 *
81 * DESCRIPTION: Installs the core subsystem default address space handlers.
82 *
83 ******************************************************************************/
84
85acpi_status acpi_ev_install_region_handlers(void)
86{
87 acpi_status status;
88 u32 i;
89
90 ACPI_FUNCTION_TRACE(ev_install_region_handlers);
91
92 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
93 if (ACPI_FAILURE(status)) {
94 return_ACPI_STATUS(status);
95 }
96
97 /*
98 * All address spaces (PCI Config, EC, SMBus) are scope dependent and
99 * registration must occur for a specific device.
100 *
101 * In the case of the system memory and IO address spaces there is
102 * currently no device associated with the address space. For these we
103 * use the root.
104 *
105 * We install the default PCI config space handler at the root so that
106 * this space is immediately available even though the we have not
107 * enumerated all the PCI Root Buses yet. This is to conform to the ACPI
108 * specification which states that the PCI config space must be always
109 * available -- even though we are nowhere near ready to find the PCI root
110 * buses at this point.
111 *
112 * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
113 * has already been installed (via acpi_install_address_space_handler).
114 * Similar for AE_SAME_HANDLER.
115 */
116 for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
117 status = acpi_ev_install_space_handler(acpi_gbl_root_node,
118 acpi_gbl_default_address_spaces
119 [i],
120 ACPI_DEFAULT_HANDLER,
121 NULL, NULL);
122 switch (status) {
123 case AE_OK:
124 case AE_SAME_HANDLER:
125 case AE_ALREADY_EXISTS:
126
127 /* These exceptions are all OK */
128
129 status = AE_OK;
130 break;
131
132 default:
133
134 goto unlock_and_exit;
135 }
136 }
137
138 unlock_and_exit:
139 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
140 return_ACPI_STATUS(status);
141}
142
143/*******************************************************************************
144 *
145 * FUNCTION: acpi_ev_initialize_op_regions
146 *
147 * PARAMETERS: None
148 *
149 * RETURN: Status
150 *
151 * DESCRIPTION: Execute _REG methods for all Operation Regions that have
152 * an installed default region handler.
153 *
154 ******************************************************************************/
155
156acpi_status acpi_ev_initialize_op_regions(void)
157{
158 acpi_status status;
159 u32 i;
160
161 ACPI_FUNCTION_TRACE(ev_initialize_op_regions);
162
163 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
164 if (ACPI_FAILURE(status)) {
165 return_ACPI_STATUS(status);
166 }
167
168 /* Run the _REG methods for op_regions in each default address space */
169
170 for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
171 /*
172 * TBD: Make sure handler is the DEFAULT handler, otherwise
173 * _REG will have already been run.
174 */
175 status = acpi_ev_execute_reg_methods(acpi_gbl_root_node,
176 acpi_gbl_default_address_spaces
177 [i]);
178 }
179
180 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
181 return_ACPI_STATUS(status);
182}
183
184/*******************************************************************************
185 *
186 * FUNCTION: acpi_ev_execute_reg_method
187 *
188 * PARAMETERS: region_obj - Region object
189 * Function - Passed to _REG: On (1) or Off (0)
190 *
191 * RETURN: Status
192 *
193 * DESCRIPTION: Execute _REG method for a region
194 *
195 ******************************************************************************/
196
197acpi_status
198acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function)
199{
200 struct acpi_evaluate_info *info;
201 union acpi_operand_object *args[3];
202 union acpi_operand_object *region_obj2;
203 acpi_status status;
204
205 ACPI_FUNCTION_TRACE(ev_execute_reg_method);
206
207 region_obj2 = acpi_ns_get_secondary_object(region_obj);
208 if (!region_obj2) {
209 return_ACPI_STATUS(AE_NOT_EXIST);
210 }
211
212 if (region_obj2->extra.method_REG == NULL) {
213 return_ACPI_STATUS(AE_OK);
214 }
215
216 /* Allocate and initialize the evaluation information block */
217
218 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
219 if (!info) {
220 return_ACPI_STATUS(AE_NO_MEMORY);
221 }
222
223 info->prefix_node = region_obj2->extra.method_REG;
224 info->pathname = NULL;
225 info->parameters = args;
226 info->flags = ACPI_IGNORE_RETURN_VALUE;
227
228 /*
229 * The _REG method has two arguments:
230 *
231 * Arg0 - Integer:
232 * Operation region space ID Same value as region_obj->Region.space_id
233 *
234 * Arg1 - Integer:
235 * connection status 1 for connecting the handler, 0 for disconnecting
236 * the handler (Passed as a parameter)
237 */
238 args[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
239 if (!args[0]) {
240 status = AE_NO_MEMORY;
241 goto cleanup1;
242 }
243
244 args[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
245 if (!args[1]) {
246 status = AE_NO_MEMORY;
247 goto cleanup2;
248 }
249
250 /* Setup the parameter objects */
251
252 args[0]->integer.value = region_obj->region.space_id;
253 args[1]->integer.value = function;
254 args[2] = NULL;
255
256 /* Execute the method, no return value */
257
258 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
259 (ACPI_TYPE_METHOD, info->prefix_node, NULL));
260
261 status = acpi_ns_evaluate(info);
262 acpi_ut_remove_reference(args[1]);
263
264 cleanup2:
265 acpi_ut_remove_reference(args[0]);
266
267 cleanup1:
268 ACPI_FREE(info);
269 return_ACPI_STATUS(status);
270}
271
272/*******************************************************************************
273 *
274 * FUNCTION: acpi_ev_address_space_dispatch
275 *
276 * PARAMETERS: region_obj - Internal region object
277 * Function - Read or Write operation
278 * Address - Where in the space to read or write
279 * bit_width - Field width in bits (8, 16, 32, or 64)
280 * Value - Pointer to in or out value, must be
281 * full 64-bit acpi_integer
282 *
283 * RETURN: Status
284 *
285 * DESCRIPTION: Dispatch an address space or operation region access to
286 * a previously installed handler.
287 *
288 ******************************************************************************/
289
290acpi_status
291acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
292 u32 function,
293 acpi_physical_address address,
294 u32 bit_width, acpi_integer * value)
295{
296 acpi_status status;
297 acpi_adr_space_handler handler;
298 acpi_adr_space_setup region_setup;
299 union acpi_operand_object *handler_desc;
300 union acpi_operand_object *region_obj2;
301 void *region_context = NULL;
302
303 ACPI_FUNCTION_TRACE(ev_address_space_dispatch);
304
305 region_obj2 = acpi_ns_get_secondary_object(region_obj);
306 if (!region_obj2) {
307 return_ACPI_STATUS(AE_NOT_EXIST);
308 }
309
310 /* Ensure that there is a handler associated with this region */
311
312 handler_desc = region_obj->region.handler;
313 if (!handler_desc) {
314 ACPI_ERROR((AE_INFO,
315 "No handler for Region [%4.4s] (%p) [%s]",
316 acpi_ut_get_node_name(region_obj->region.node),
317 region_obj,
318 acpi_ut_get_region_name(region_obj->region.
319 space_id)));
320
321 return_ACPI_STATUS(AE_NOT_EXIST);
322 }
323
324 /*
325 * It may be the case that the region has never been initialized.
326 * Some types of regions require special init code
327 */
328 if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
329
330 /* This region has not been initialized yet, do it */
331
332 region_setup = handler_desc->address_space.setup;
333 if (!region_setup) {
334
335 /* No initialization routine, exit with error */
336
337 ACPI_ERROR((AE_INFO,
338 "No init routine for region(%p) [%s]",
339 region_obj,
340 acpi_ut_get_region_name(region_obj->region.
341 space_id)));
342 return_ACPI_STATUS(AE_NOT_EXIST);
343 }
344
345 /*
346 * We must exit the interpreter because the region setup will
347 * potentially execute control methods (for example, the _REG method
348 * for this region)
349 */
350 acpi_ex_exit_interpreter();
351
352 status = region_setup(region_obj, ACPI_REGION_ACTIVATE,
353 handler_desc->address_space.context,
354 &region_context);
355
356 /* Re-enter the interpreter */
357
358 acpi_ex_enter_interpreter();
359
360 /* Check for failure of the Region Setup */
361
362 if (ACPI_FAILURE(status)) {
363 ACPI_EXCEPTION((AE_INFO, status,
364 "During region initialization: [%s]",
365 acpi_ut_get_region_name(region_obj->
366 region.
367 space_id)));
368 return_ACPI_STATUS(status);
369 }
370
371 /* Region initialization may have been completed by region_setup */
372
373 if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
374 region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE;
375
376 if (region_obj2->extra.region_context) {
377
378 /* The handler for this region was already installed */
379
380 ACPI_FREE(region_context);
381 } else {
382 /*
383 * Save the returned context for use in all accesses to
384 * this particular region
385 */
386 region_obj2->extra.region_context =
387 region_context;
388 }
389 }
390 }
391
392 /* We have everything we need, we can invoke the address space handler */
393
394 handler = handler_desc->address_space.handler;
395
396 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
397 "Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
398 &region_obj->region.handler->address_space, handler,
399 ACPI_FORMAT_NATIVE_UINT(address),
400 acpi_ut_get_region_name(region_obj->region.
401 space_id)));
402
403 if (!(handler_desc->address_space.handler_flags &
404 ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
405 /*
406 * For handlers other than the default (supplied) handlers, we must
407 * exit the interpreter because the handler *might* block -- we don't
408 * know what it will do, so we can't hold the lock on the intepreter.
409 */
410 acpi_ex_exit_interpreter();
411 }
412
413 /* Call the handler */
414
415 status = handler(function, address, bit_width, value,
416 handler_desc->address_space.context,
417 region_obj2->extra.region_context);
418
419 if (ACPI_FAILURE(status)) {
420 ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]",
421 acpi_ut_get_region_name(region_obj->region.
422 space_id)));
423 }
424
425 if (!(handler_desc->address_space.handler_flags &
426 ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
427 /*
428 * We just returned from a non-default handler, we must re-enter the
429 * interpreter
430 */
431 acpi_ex_enter_interpreter();
432 }
433
434 return_ACPI_STATUS(status);
435}
436
437/*******************************************************************************
438 *
439 * FUNCTION: acpi_ev_detach_region
440 *
441 * PARAMETERS: region_obj - Region Object
442 * acpi_ns_is_locked - Namespace Region Already Locked?
443 *
444 * RETURN: None
445 *
446 * DESCRIPTION: Break the association between the handler and the region
447 * this is a two way association.
448 *
449 ******************************************************************************/
450
451void
452acpi_ev_detach_region(union acpi_operand_object *region_obj,
453 u8 acpi_ns_is_locked)
454{
455 union acpi_operand_object *handler_obj;
456 union acpi_operand_object *obj_desc;
457 union acpi_operand_object **last_obj_ptr;
458 acpi_adr_space_setup region_setup;
459 void **region_context;
460 union acpi_operand_object *region_obj2;
461 acpi_status status;
462
463 ACPI_FUNCTION_TRACE(ev_detach_region);
464
465 region_obj2 = acpi_ns_get_secondary_object(region_obj);
466 if (!region_obj2) {
467 return_VOID;
468 }
469 region_context = &region_obj2->extra.region_context;
470
471 /* Get the address handler from the region object */
472
473 handler_obj = region_obj->region.handler;
474 if (!handler_obj) {
475
476 /* This region has no handler, all done */
477
478 return_VOID;
479 }
480
481 /* Find this region in the handler's list */
482
483 obj_desc = handler_obj->address_space.region_list;
484 last_obj_ptr = &handler_obj->address_space.region_list;
485
486 while (obj_desc) {
487
488 /* Is this the correct Region? */
489
490 if (obj_desc == region_obj) {
491 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
492 "Removing Region %p from address handler %p\n",
493 region_obj, handler_obj));
494
495 /* This is it, remove it from the handler's list */
496
497 *last_obj_ptr = obj_desc->region.next;
498 obj_desc->region.next = NULL; /* Must clear field */
499
500 if (acpi_ns_is_locked) {
501 status =
502 acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
503 if (ACPI_FAILURE(status)) {
504 return_VOID;
505 }
506 }
507
508 /* Now stop region accesses by executing the _REG method */
509
510 status = acpi_ev_execute_reg_method(region_obj, 0);
511 if (ACPI_FAILURE(status)) {
512 ACPI_EXCEPTION((AE_INFO, status,
513 "from region _REG, [%s]",
514 acpi_ut_get_region_name
515 (region_obj->region.space_id)));
516 }
517
518 if (acpi_ns_is_locked) {
519 status =
520 acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
521 if (ACPI_FAILURE(status)) {
522 return_VOID;
523 }
524 }
525
526 /*
527 * If the region has been activated, call the setup handler with
528 * the deactivate notification
529 */
530 if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
531 region_setup = handler_obj->address_space.setup;
532 status =
533 region_setup(region_obj,
534 ACPI_REGION_DEACTIVATE,
535 handler_obj->address_space.
536 context, region_context);
537
538 /* Init routine may fail, Just ignore errors */
539
540 if (ACPI_FAILURE(status)) {
541 ACPI_EXCEPTION((AE_INFO, status,
542 "from region handler - deactivate, [%s]",
543 acpi_ut_get_region_name
544 (region_obj->region.
545 space_id)));
546 }
547
548 region_obj->region.flags &=
549 ~(AOPOBJ_SETUP_COMPLETE);
550 }
551
552 /*
553 * Remove handler reference in the region
554 *
555 * NOTE: this doesn't mean that the region goes away, the region
556 * is just inaccessible as indicated to the _REG method
557 *
558 * If the region is on the handler's list, this must be the
559 * region's handler
560 */
561 region_obj->region.handler = NULL;
562 acpi_ut_remove_reference(handler_obj);
563
564 return_VOID;
565 }
566
567 /* Walk the linked list of handlers */
568
569 last_obj_ptr = &obj_desc->region.next;
570 obj_desc = obj_desc->region.next;
571 }
572
573 /* If we get here, the region was not in the handler's region list */
574
575 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
576 "Cannot remove region %p from address handler %p\n",
577 region_obj, handler_obj));
578
579 return_VOID;
580}
581
582/*******************************************************************************
583 *
584 * FUNCTION: acpi_ev_attach_region
585 *
586 * PARAMETERS: handler_obj - Handler Object
587 * region_obj - Region Object
588 * acpi_ns_is_locked - Namespace Region Already Locked?
589 *
590 * RETURN: None
591 *
592 * DESCRIPTION: Create the association between the handler and the region
593 * this is a two way association.
594 *
595 ******************************************************************************/
596
597acpi_status
598acpi_ev_attach_region(union acpi_operand_object *handler_obj,
599 union acpi_operand_object *region_obj,
600 u8 acpi_ns_is_locked)
601{
602
603 ACPI_FUNCTION_TRACE(ev_attach_region);
604
605 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
606 "Adding Region [%4.4s] %p to address handler %p [%s]\n",
607 acpi_ut_get_node_name(region_obj->region.node),
608 region_obj, handler_obj,
609 acpi_ut_get_region_name(region_obj->region.
610 space_id)));
611
612 /* Link this region to the front of the handler's list */
613
614 region_obj->region.next = handler_obj->address_space.region_list;
615 handler_obj->address_space.region_list = region_obj;
616
617 /* Install the region's handler */
618
619 if (region_obj->region.handler) {
620 return_ACPI_STATUS(AE_ALREADY_EXISTS);
621 }
622
623 region_obj->region.handler = handler_obj;
624 acpi_ut_add_reference(handler_obj);
625
626 return_ACPI_STATUS(AE_OK);
627}
628
629/*******************************************************************************
630 *
631 * FUNCTION: acpi_ev_install_handler
632 *
633 * PARAMETERS: walk_namespace callback
634 *
635 * DESCRIPTION: This routine installs an address handler into objects that are
636 * of type Region or Device.
637 *
638 * If the Object is a Device, and the device has a handler of
639 * the same type then the search is terminated in that branch.
640 *
641 * This is because the existing handler is closer in proximity
642 * to any more regions than the one we are trying to install.
643 *
644 ******************************************************************************/
645
646static acpi_status
647acpi_ev_install_handler(acpi_handle obj_handle,
648 u32 level, void *context, void **return_value)
649{
650 union acpi_operand_object *handler_obj;
651 union acpi_operand_object *next_handler_obj;
652 union acpi_operand_object *obj_desc;
653 struct acpi_namespace_node *node;
654 acpi_status status;
655
656 ACPI_FUNCTION_NAME(ev_install_handler);
657
658 handler_obj = (union acpi_operand_object *)context;
659
660 /* Parameter validation */
661
662 if (!handler_obj) {
663 return (AE_OK);
664 }
665
666 /* Convert and validate the device handle */
667
668 node = acpi_ns_map_handle_to_node(obj_handle);
669 if (!node) {
670 return (AE_BAD_PARAMETER);
671 }
672
673 /*
674 * We only care about regions and objects that are allowed to have
675 * address space handlers
676 */
677 if ((node->type != ACPI_TYPE_DEVICE) &&
678 (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
679 return (AE_OK);
680 }
681
682 /* Check for an existing internal object */
683
684 obj_desc = acpi_ns_get_attached_object(node);
685 if (!obj_desc) {
686
687 /* No object, just exit */
688
689 return (AE_OK);
690 }
691
692 /* Devices are handled different than regions */
693
694 if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) {
695
696 /* Check if this Device already has a handler for this address space */
697
698 next_handler_obj = obj_desc->device.handler;
699 while (next_handler_obj) {
700
701 /* Found a handler, is it for the same address space? */
702
703 if (next_handler_obj->address_space.space_id ==
704 handler_obj->address_space.space_id) {
705 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
706 "Found handler for region [%s] in device %p(%p) handler %p\n",
707 acpi_ut_get_region_name
708 (handler_obj->address_space.
709 space_id), obj_desc,
710 next_handler_obj,
711 handler_obj));
712
713 /*
714 * Since the object we found it on was a device, then it
715 * means that someone has already installed a handler for
716 * the branch of the namespace from this device on. Just
717 * bail out telling the walk routine to not traverse this
718 * branch. This preserves the scoping rule for handlers.
719 */
720 return (AE_CTRL_DEPTH);
721 }
722
723 /* Walk the linked list of handlers attached to this device */
724
725 next_handler_obj = next_handler_obj->address_space.next;
726 }
727
728 /*
729 * As long as the device didn't have a handler for this space we
730 * don't care about it. We just ignore it and proceed.
731 */
732 return (AE_OK);
733 }
734
735 /* Object is a Region */
736
737 if (obj_desc->region.space_id != handler_obj->address_space.space_id) {
738
739 /* This region is for a different address space, just ignore it */
740
741 return (AE_OK);
742 }
743
744 /*
745 * Now we have a region and it is for the handler's address space type.
746 *
747 * First disconnect region for any previous handler (if any)
748 */
749 acpi_ev_detach_region(obj_desc, FALSE);
750
751 /* Connect the region to the new handler */
752
753 status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE);
754 return (status);
755}
756
757/*******************************************************************************
758 *
759 * FUNCTION: acpi_ev_install_space_handler
760 *
761 * PARAMETERS: Node - Namespace node for the device
762 * space_id - The address space ID
763 * Handler - Address of the handler
764 * Setup - Address of the setup function
765 * Context - Value passed to the handler on each access
766 *
767 * RETURN: Status
768 *
769 * DESCRIPTION: Install a handler for all op_regions of a given space_id.
770 * Assumes namespace is locked
771 *
772 ******************************************************************************/
773
774acpi_status
775acpi_ev_install_space_handler(struct acpi_namespace_node * node,
776 acpi_adr_space_type space_id,
777 acpi_adr_space_handler handler,
778 acpi_adr_space_setup setup, void *context)
779{
780 union acpi_operand_object *obj_desc;
781 union acpi_operand_object *handler_obj;
782 acpi_status status;
783 acpi_object_type type;
784 u8 flags = 0;
785
786 ACPI_FUNCTION_TRACE(ev_install_space_handler);
787
788 /*
789 * This registration is valid for only the types below and the root. This
790 * is where the default handlers get placed.
791 */
792 if ((node->type != ACPI_TYPE_DEVICE) &&
793 (node->type != ACPI_TYPE_PROCESSOR) &&
794 (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) {
795 status = AE_BAD_PARAMETER;
796 goto unlock_and_exit;
797 }
798
799 if (handler == ACPI_DEFAULT_HANDLER) {
800 flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
801
802 switch (space_id) {
803 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
804 handler = acpi_ex_system_memory_space_handler;
805 setup = acpi_ev_system_memory_region_setup;
806 break;
807
808 case ACPI_ADR_SPACE_SYSTEM_IO:
809 handler = acpi_ex_system_io_space_handler;
810 setup = acpi_ev_io_space_region_setup;
811 break;
812
813 case ACPI_ADR_SPACE_PCI_CONFIG:
814 handler = acpi_ex_pci_config_space_handler;
815 setup = acpi_ev_pci_config_region_setup;
816 break;
817
818 case ACPI_ADR_SPACE_CMOS:
819 handler = acpi_ex_cmos_space_handler;
820 setup = acpi_ev_cmos_region_setup;
821 break;
822
823 case ACPI_ADR_SPACE_PCI_BAR_TARGET:
824 handler = acpi_ex_pci_bar_space_handler;
825 setup = acpi_ev_pci_bar_region_setup;
826 break;
827
828 case ACPI_ADR_SPACE_DATA_TABLE:
829 handler = acpi_ex_data_table_space_handler;
830 setup = NULL;
831 break;
832
833 default:
834 status = AE_BAD_PARAMETER;
835 goto unlock_and_exit;
836 }
837 }
838
839 /* If the caller hasn't specified a setup routine, use the default */
840
841 if (!setup) {
842 setup = acpi_ev_default_region_setup;
843 }
844
845 /* Check for an existing internal object */
846
847 obj_desc = acpi_ns_get_attached_object(node);
848 if (obj_desc) {
849 /*
850 * The attached device object already exists. Make sure the handler
851 * is not already installed.
852 */
853 handler_obj = obj_desc->device.handler;
854
855 /* Walk the handler list for this device */
856
857 while (handler_obj) {
858
859 /* Same space_id indicates a handler already installed */
860
861 if (handler_obj->address_space.space_id == space_id) {
862 if (handler_obj->address_space.handler ==
863 handler) {
864 /*
865 * It is (relatively) OK to attempt to install the SAME
866 * handler twice. This can easily happen with the
867 * PCI_Config space.
868 */
869 status = AE_SAME_HANDLER;
870 goto unlock_and_exit;
871 } else {
872 /* A handler is already installed */
873
874 status = AE_ALREADY_EXISTS;
875 }
876 goto unlock_and_exit;
877 }
878
879 /* Walk the linked list of handlers */
880
881 handler_obj = handler_obj->address_space.next;
882 }
883 } else {
884 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
885 "Creating object on Device %p while installing handler\n",
886 node));
887
888 /* obj_desc does not exist, create one */
889
890 if (node->type == ACPI_TYPE_ANY) {
891 type = ACPI_TYPE_DEVICE;
892 } else {
893 type = node->type;
894 }
895
896 obj_desc = acpi_ut_create_internal_object(type);
897 if (!obj_desc) {
898 status = AE_NO_MEMORY;
899 goto unlock_and_exit;
900 }
901
902 /* Init new descriptor */
903
904 obj_desc->common.type = (u8) type;
905
906 /* Attach the new object to the Node */
907
908 status = acpi_ns_attach_object(node, obj_desc, type);
909
910 /* Remove local reference to the object */
911
912 acpi_ut_remove_reference(obj_desc);
913
914 if (ACPI_FAILURE(status)) {
915 goto unlock_and_exit;
916 }
917 }
918
919 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
920 "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
921 acpi_ut_get_region_name(space_id), space_id,
922 acpi_ut_get_node_name(node), node, obj_desc));
923
924 /*
925 * Install the handler
926 *
927 * At this point there is no existing handler. Just allocate the object
928 * for the handler and link it into the list.
929 */
930 handler_obj =
931 acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
932 if (!handler_obj) {
933 status = AE_NO_MEMORY;
934 goto unlock_and_exit;
935 }
936
937 /* Init handler obj */
938
939 handler_obj->address_space.space_id = (u8) space_id;
940 handler_obj->address_space.handler_flags = flags;
941 handler_obj->address_space.region_list = NULL;
942 handler_obj->address_space.node = node;
943 handler_obj->address_space.handler = handler;
944 handler_obj->address_space.context = context;
945 handler_obj->address_space.setup = setup;
946
947 /* Install at head of Device.address_space list */
948
949 handler_obj->address_space.next = obj_desc->device.handler;
950
951 /*
952 * The Device object is the first reference on the handler_obj.
953 * Each region that uses the handler adds a reference.
954 */
955 obj_desc->device.handler = handler_obj;
956
957 /*
958 * Walk the namespace finding all of the regions this
959 * handler will manage.
960 *
961 * Start at the device and search the branch toward
962 * the leaf nodes until either the leaf is encountered or
963 * a device is detected that has an address handler of the
964 * same type.
965 *
966 * In either case, back up and search down the remainder
967 * of the branch
968 */
969 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
970 ACPI_NS_WALK_UNLOCK,
971 acpi_ev_install_handler, handler_obj,
972 NULL);
973
974 unlock_and_exit:
975 return_ACPI_STATUS(status);
976}
977
978/*******************************************************************************
979 *
980 * FUNCTION: acpi_ev_execute_reg_methods
981 *
982 * PARAMETERS: Node - Namespace node for the device
983 * space_id - The address space ID
984 *
985 * RETURN: Status
986 *
987 * DESCRIPTION: Run all _REG methods for the input Space ID;
988 * Note: assumes namespace is locked, or system init time.
989 *
990 ******************************************************************************/
991
992acpi_status
993acpi_ev_execute_reg_methods(struct acpi_namespace_node *node,
994 acpi_adr_space_type space_id)
995{
996 acpi_status status;
997
998 ACPI_FUNCTION_TRACE(ev_execute_reg_methods);
999
1000 /*
1001 * Run all _REG methods for all Operation Regions for this space ID. This
1002 * is a separate walk in order to handle any interdependencies between
1003 * regions and _REG methods. (i.e. handlers must be installed for all
1004 * regions of this Space ID before we can run any _REG methods)
1005 */
1006 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
1007 ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run,
1008 &space_id, NULL);
1009
1010 return_ACPI_STATUS(status);
1011}
1012
1013/*******************************************************************************
1014 *
1015 * FUNCTION: acpi_ev_reg_run
1016 *
1017 * PARAMETERS: walk_namespace callback
1018 *
1019 * DESCRIPTION: Run _REG method for region objects of the requested space_iD
1020 *
1021 ******************************************************************************/
1022
1023static acpi_status
1024acpi_ev_reg_run(acpi_handle obj_handle,
1025 u32 level, void *context, void **return_value)
1026{
1027 union acpi_operand_object *obj_desc;
1028 struct acpi_namespace_node *node;
1029 acpi_adr_space_type space_id;
1030 acpi_status status;
1031
1032 space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context);
1033
1034 /* Convert and validate the device handle */
1035
1036 node = acpi_ns_map_handle_to_node(obj_handle);
1037 if (!node) {
1038 return (AE_BAD_PARAMETER);
1039 }
1040
1041 /*
1042 * We only care about regions.and objects that are allowed to have address
1043 * space handlers
1044 */
1045 if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
1046 return (AE_OK);
1047 }
1048
1049 /* Check for an existing internal object */
1050
1051 obj_desc = acpi_ns_get_attached_object(node);
1052 if (!obj_desc) {
1053
1054 /* No object, just exit */
1055
1056 return (AE_OK);
1057 }
1058
1059 /* Object is a Region */
1060
1061 if (obj_desc->region.space_id != space_id) {
1062
1063 /* This region is for a different address space, just ignore it */
1064
1065 return (AE_OK);
1066 }
1067
1068 status = acpi_ev_execute_reg_method(obj_desc, 1);
1069 return (status);
1070}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-19 18:09:44 -0500