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ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / drivers / acpi / events / evrgnini.c
blob2e3d2c5e4f4d2a7a7b4571475646fe970733f1e3
1 /******************************************************************************
2 *
3 * Module Name: evrgnini- ACPI address_space (op_region) init
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 <acpi/acevents.h>
46 #include <acpi/acnamesp.h>
47
48 #define _COMPONENT ACPI_EVENTS
49 ACPI_MODULE_NAME("evrgnini")
50
51 /* Local prototypes */
52 static u8 acpi_ev_match_pci_root_bridge(char *id);
53
54 static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
55
56 /*******************************************************************************
57 *
58 * FUNCTION: acpi_ev_system_memory_region_setup
59 *
60 * PARAMETERS: Handle - Region we are interested in
61 * Function - Start or stop
62 * handler_context - Address space handler context
63 * region_context - Region specific context
64 *
65 * RETURN: Status
66 *
67 * DESCRIPTION: Setup a system_memory operation region
68 *
69 ******************************************************************************/
70
71 acpi_status
72 acpi_ev_system_memory_region_setup(acpi_handle handle,
73 u32 function,
74 void *handler_context, void **region_context)
75 {
76 union acpi_operand_object *region_desc =
77 (union acpi_operand_object *)handle;
78 struct acpi_mem_space_context *local_region_context;
79
80 ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);
81
82 if (function == ACPI_REGION_DEACTIVATE) {
83 if (*region_context) {
84 local_region_context =
85 (struct acpi_mem_space_context *)*region_context;
86
87 /* Delete a cached mapping if present */
88
89 if (local_region_context->mapped_length) {
90 acpi_os_unmap_memory(local_region_context->
91 mapped_logical_address,
92 local_region_context->
93 mapped_length);
94 }
95 ACPI_FREE(local_region_context);
96 *region_context = NULL;
97 }
98 return_ACPI_STATUS(AE_OK);
99 }
100
101 /* Create a new context */
102
103 local_region_context =
104 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
105 if (!(local_region_context)) {
106 return_ACPI_STATUS(AE_NO_MEMORY);
107 }
108
109 /* Save the region length and address for use in the handler */
110
111 local_region_context->length = region_desc->region.length;
112 local_region_context->address = region_desc->region.address;
113
114 *region_context = local_region_context;
115 return_ACPI_STATUS(AE_OK);
116 }
117
118 /*******************************************************************************
119 *
120 * FUNCTION: acpi_ev_io_space_region_setup
121 *
122 * PARAMETERS: Handle - Region we are interested in
123 * Function - Start or stop
124 * handler_context - Address space handler context
125 * region_context - Region specific context
126 *
127 * RETURN: Status
128 *
129 * DESCRIPTION: Setup a IO operation region
130 *
131 ******************************************************************************/
132
133 acpi_status
134 acpi_ev_io_space_region_setup(acpi_handle handle,
135 u32 function,
136 void *handler_context, void **region_context)
137 {
138 ACPI_FUNCTION_TRACE(ev_io_space_region_setup);
139
140 if (function == ACPI_REGION_DEACTIVATE) {
141 *region_context = NULL;
142 } else {
143 *region_context = handler_context;
144 }
145
146 return_ACPI_STATUS(AE_OK);
147 }
148
149 /*******************************************************************************
150 *
151 * FUNCTION: acpi_ev_pci_config_region_setup
152 *
153 * PARAMETERS: Handle - Region we are interested in
154 * Function - Start or stop
155 * handler_context - Address space handler context
156 * region_context - Region specific context
157 *
158 * RETURN: Status
159 *
160 * DESCRIPTION: Setup a PCI_Config operation region
161 *
162 * MUTEX: Assumes namespace is not locked
163 *
164 ******************************************************************************/
165
166 acpi_status
167 acpi_ev_pci_config_region_setup(acpi_handle handle,
168 u32 function,
169 void *handler_context, void **region_context)
170 {
171 acpi_status status = AE_OK;
172 acpi_integer pci_value;
173 struct acpi_pci_id *pci_id = *region_context;
174 union acpi_operand_object *handler_obj;
175 struct acpi_namespace_node *parent_node;
176 struct acpi_namespace_node *pci_root_node;
177 struct acpi_namespace_node *pci_device_node;
178 union acpi_operand_object *region_obj =
179 (union acpi_operand_object *)handle;
180
181 ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
182
183 handler_obj = region_obj->region.handler;
184 if (!handler_obj) {
185 /*
186 * No installed handler. This shouldn't happen because the dispatch
187 * routine checks before we get here, but we check again just in case.
188 */
189 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
190 "Attempting to init a region %p, with no handler\n",
191 region_obj));
192 return_ACPI_STATUS(AE_NOT_EXIST);
193 }
194
195 *region_context = NULL;
196 if (function == ACPI_REGION_DEACTIVATE) {
197 if (pci_id) {
198 ACPI_FREE(pci_id);
199 }
200 return_ACPI_STATUS(status);
201 }
202
203 parent_node = acpi_ns_get_parent_node(region_obj->region.node);
204
205 /*
206 * Get the _SEG and _BBN values from the device upon which the handler
207 * is installed.
208 *
209 * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
210 * This is the device the handler has been registered to handle.
211 */
212
213 /*
214 * If the address_space.Node is still pointing to the root, we need
215 * to scan upward for a PCI Root bridge and re-associate the op_region
216 * handlers with that device.
217 */
218 if (handler_obj->address_space.node == acpi_gbl_root_node) {
219
220 /* Start search from the parent object */
221
222 pci_root_node = parent_node;
223 while (pci_root_node != acpi_gbl_root_node) {
224
225 /* Get the _HID/_CID in order to detect a root_bridge */
226
227 if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
228
229 /* Install a handler for this PCI root bridge */
230
231 status =
232 acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
233 if (ACPI_FAILURE(status)) {
234 if (status == AE_SAME_HANDLER) {
235 /*
236 * It is OK if the handler is already installed on the root
237 * bridge. Still need to return a context object for the
238 * new PCI_Config operation region, however.
239 */
240 status = AE_OK;
241 } else {
242 ACPI_EXCEPTION((AE_INFO, status,
243 "Could not install PciConfig handler for Root Bridge %4.4s",
244 acpi_ut_get_node_name
245 (pci_root_node)));
246 }
247 }
248 break;
249 }
250
251 pci_root_node = acpi_ns_get_parent_node(pci_root_node);
252 }
253
254 /* PCI root bridge not found, use namespace root node */
255 } else {
256 pci_root_node = handler_obj->address_space.node;
257 }
258
259 /*
260 * If this region is now initialized, we are done.
261 * (install_address_space_handler could have initialized it)
262 */
263 if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
264 return_ACPI_STATUS(AE_OK);
265 }
266
267 /* Region is still not initialized. Create a new context */
268
269 pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
270 if (!pci_id) {
271 return_ACPI_STATUS(AE_NO_MEMORY);
272 }
273
274 /*
275 * For PCI_Config space access, we need the segment, bus,
276 * device and function numbers. Acquire them here.
277 *
278 * Find the parent device object. (This allows the operation region to be
279 * within a subscope under the device, such as a control method.)
280 */
281 pci_device_node = region_obj->region.node;
282 while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
283 pci_device_node = acpi_ns_get_parent_node(pci_device_node);
284 }
285
286 if (!pci_device_node) {
287 ACPI_FREE(pci_id);
288 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
289 }
290
291 /*
292 * Get the PCI device and function numbers from the _ADR object
293 * contained in the parent's scope.
294 */
295 status =
296 acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, pci_device_node,
297 &pci_value);
298
299 /*
300 * The default is zero, and since the allocation above zeroed
301 * the data, just do nothing on failure.
302 */
303 if (ACPI_SUCCESS(status)) {
304 pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
305 pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
306 }
307
308 /* The PCI segment number comes from the _SEG method */
309
310 status =
311 acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG, pci_root_node,
312 &pci_value);
313 if (ACPI_SUCCESS(status)) {
314 pci_id->segment = ACPI_LOWORD(pci_value);
315 }
316
317 /* The PCI bus number comes from the _BBN method */
318
319 status =
320 acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN, pci_root_node,
321 &pci_value);
322 if (ACPI_SUCCESS(status)) {
323 pci_id->bus = ACPI_LOWORD(pci_value);
324 }
325
326 /* Complete this device's pci_id */
327
328 acpi_os_derive_pci_id(pci_root_node, region_obj->region.node, &pci_id);
329
330 *region_context = pci_id;
331 return_ACPI_STATUS(AE_OK);
332 }
333
334 /*******************************************************************************
335 *
336 * FUNCTION: acpi_ev_match_pci_root_bridge
337 *
338 * PARAMETERS: Id - The HID/CID in string format
339 *
340 * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
341 *
342 * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
343 *
344 ******************************************************************************/
345
346 static u8 acpi_ev_match_pci_root_bridge(char *id)
347 {
348
349 /*
350 * Check if this is a PCI root.
351 * ACPI 3.0+: check for a PCI Express root also.
352 */
353 if (!(ACPI_STRNCMP(id,
354 PCI_ROOT_HID_STRING,
355 sizeof(PCI_ROOT_HID_STRING))) ||
356 !(ACPI_STRNCMP(id,
357 PCI_EXPRESS_ROOT_HID_STRING,
358 sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
359 return (TRUE);
360 }
361
362 return (FALSE);
363 }
364
365 /*******************************************************************************
366 *
367 * FUNCTION: acpi_ev_is_pci_root_bridge
368 *
369 * PARAMETERS: Node - Device node being examined
370 *
371 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
372 *
373 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
374 * examining the _HID and _CID for the device.
375 *
376 ******************************************************************************/
377
378 static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
379 {
380 acpi_status status;
381 struct acpica_device_id hid;
382 struct acpi_compatible_id_list *cid;
383 acpi_native_uint i;
384
385 /*
386 * Get the _HID and check for a PCI Root Bridge
387 */
388 status = acpi_ut_execute_HID(node, &hid);
389 if (ACPI_FAILURE(status)) {
390 return (FALSE);
391 }
392
393 if (acpi_ev_match_pci_root_bridge(hid.value)) {
394 return (TRUE);
395 }
396
397 /*
398 * The _HID did not match.
399 * Get the _CID and check for a PCI Root Bridge
400 */
401 status = acpi_ut_execute_CID(node, &cid);
402 if (ACPI_FAILURE(status)) {
403 return (FALSE);
404 }
405
406 /* Check all _CIDs in the returned list */
407
408 for (i = 0; i < cid->count; i++) {
409 if (acpi_ev_match_pci_root_bridge(cid->id[i].value)) {
410 ACPI_FREE(cid);
411 return (TRUE);
412 }
413 }
414
415 ACPI_FREE(cid);
416 return (FALSE);
417 }
418
419 /*******************************************************************************
420 *
421 * FUNCTION: acpi_ev_pci_bar_region_setup
422 *
423 * PARAMETERS: Handle - Region we are interested in
424 * Function - Start or stop
425 * handler_context - Address space handler context
426 * region_context - Region specific context
427 *
428 * RETURN: Status
429 *
430 * DESCRIPTION: Setup a pci_bAR operation region
431 *
432 * MUTEX: Assumes namespace is not locked
433 *
434 ******************************************************************************/
435
436 acpi_status
437 acpi_ev_pci_bar_region_setup(acpi_handle handle,
438 u32 function,
439 void *handler_context, void **region_context)
440 {
441 ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);
442
443 return_ACPI_STATUS(AE_OK);
444 }
445
446 /*******************************************************************************
447 *
448 * FUNCTION: acpi_ev_cmos_region_setup
449 *
450 * PARAMETERS: Handle - Region we are interested in
451 * Function - Start or stop
452 * handler_context - Address space handler context
453 * region_context - Region specific context
454 *
455 * RETURN: Status
456 *
457 * DESCRIPTION: Setup a CMOS operation region
458 *
459 * MUTEX: Assumes namespace is not locked
460 *
461 ******************************************************************************/
462
463 acpi_status
464 acpi_ev_cmos_region_setup(acpi_handle handle,
465 u32 function,
466 void *handler_context, void **region_context)
467 {
468 ACPI_FUNCTION_TRACE(ev_cmos_region_setup);
469
470 return_ACPI_STATUS(AE_OK);
471 }
472
473 /*******************************************************************************
474 *
475 * FUNCTION: acpi_ev_default_region_setup
476 *
477 * PARAMETERS: Handle - Region we are interested in
478 * Function - Start or stop
479 * handler_context - Address space handler context
480 * region_context - Region specific context
481 *
482 * RETURN: Status
483 *
484 * DESCRIPTION: Default region initialization
485 *
486 ******************************************************************************/
487
488 acpi_status
489 acpi_ev_default_region_setup(acpi_handle handle,
490 u32 function,
491 void *handler_context, void **region_context)
492 {
493 ACPI_FUNCTION_TRACE(ev_default_region_setup);
494
495 if (function == ACPI_REGION_DEACTIVATE) {
496 *region_context = NULL;
497 } else {
498 *region_context = handler_context;
499 }
500
501 return_ACPI_STATUS(AE_OK);
502 }
503
504 /*******************************************************************************
505 *
506 * FUNCTION: acpi_ev_initialize_region
507 *
508 * PARAMETERS: region_obj - Region we are initializing
509 * acpi_ns_locked - Is namespace locked?
510 *
511 * RETURN: Status
512 *
513 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
514 * for execution at a later time
515 *
516 * Get the appropriate address space handler for a newly
517 * created region.
518 *
519 * This also performs address space specific initialization. For
520 * example, PCI regions must have an _ADR object that contains
521 * a PCI address in the scope of the definition. This address is
522 * required to perform an access to PCI config space.
523 *
524 * MUTEX: Interpreter should be unlocked, because we may run the _REG
525 * method for this region.
526 *
527 ******************************************************************************/
528
529 acpi_status
530 acpi_ev_initialize_region(union acpi_operand_object *region_obj,
531 u8 acpi_ns_locked)
532 {
533 union acpi_operand_object *handler_obj;
534 union acpi_operand_object *obj_desc;
535 acpi_adr_space_type space_id;
536 struct acpi_namespace_node *node;
537 acpi_status status;
538 struct acpi_namespace_node *method_node;
539 acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
540 union acpi_operand_object *region_obj2;
541
542 ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
543
544 if (!region_obj) {
545 return_ACPI_STATUS(AE_BAD_PARAMETER);
546 }
547
548 if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
549 return_ACPI_STATUS(AE_OK);
550 }
551
552 region_obj2 = acpi_ns_get_secondary_object(region_obj);
553 if (!region_obj2) {
554 return_ACPI_STATUS(AE_NOT_EXIST);
555 }
556
557 node = acpi_ns_get_parent_node(region_obj->region.node);
558 space_id = region_obj->region.space_id;
559
560 /* Setup defaults */
561
562 region_obj->region.handler = NULL;
563 region_obj2->extra.method_REG = NULL;
564 region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
565 region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
566
567 /* Find any "_REG" method associated with this region definition */
568
569 status =
570 acpi_ns_search_one_scope(*reg_name_ptr, node, ACPI_TYPE_METHOD,
571 &method_node);
572 if (ACPI_SUCCESS(status)) {
573 /*
574 * The _REG method is optional and there can be only one per region
575 * definition. This will be executed when the handler is attached
576 * or removed
577 */
578 region_obj2->extra.method_REG = method_node;
579 }
580
581 /*
582 * The following loop depends upon the root Node having no parent
583 * ie: acpi_gbl_root_node->parent_entry being set to NULL
584 */
585 while (node) {
586
587 /* Check to see if a handler exists */
588
589 handler_obj = NULL;
590 obj_desc = acpi_ns_get_attached_object(node);
591 if (obj_desc) {
592
593 /* Can only be a handler if the object exists */
594
595 switch (node->type) {
596 case ACPI_TYPE_DEVICE:
597
598 handler_obj = obj_desc->device.handler;
599 break;
600
601 case ACPI_TYPE_PROCESSOR:
602
603 handler_obj = obj_desc->processor.handler;
604 break;
605
606 case ACPI_TYPE_THERMAL:
607
608 handler_obj = obj_desc->thermal_zone.handler;
609 break;
610
611 default:
612 /* Ignore other objects */
613 break;
614 }
615
616 while (handler_obj) {
617
618 /* Is this handler of the correct type? */
619
620 if (handler_obj->address_space.space_id ==
621 space_id) {
622
623 /* Found correct handler */
624
625 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
626 "Found handler %p for region %p in obj %p\n",
627 handler_obj,
628 region_obj,
629 obj_desc));
630
631 status =
632 acpi_ev_attach_region(handler_obj,
633 region_obj,
634 acpi_ns_locked);
635
636 /*
637 * Tell all users that this region is usable by running the _REG
638 * method
639 */
640 if (acpi_ns_locked) {
641 status =
642 acpi_ut_release_mutex
643 (ACPI_MTX_NAMESPACE);
644 if (ACPI_FAILURE(status)) {
645 return_ACPI_STATUS
646 (status);
647 }
648 }
649
650 status =
651 acpi_ev_execute_reg_method
652 (region_obj, 1);
653
654 if (acpi_ns_locked) {
655 status =
656 acpi_ut_acquire_mutex
657 (ACPI_MTX_NAMESPACE);
658 if (ACPI_FAILURE(status)) {
659 return_ACPI_STATUS
660 (status);
661 }
662 }
663
664 return_ACPI_STATUS(AE_OK);
665 }
666
667 /* Try next handler in the list */
668
669 handler_obj = handler_obj->address_space.next;
670 }
671 }
672
673 /*
674 * This node does not have the handler we need;
675 * Pop up one level
676 */
677 node = acpi_ns_get_parent_node(node);
678 }
679
680 /* If we get here, there is no handler for this region */
681
682 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
683 "No handler for RegionType %s(%X) (RegionObj %p)\n",
684 acpi_ut_get_region_name(space_id), space_id,
685 region_obj));
686
687 return_ACPI_STATUS(AE_NOT_EXIST);
688 }
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