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1 | /****************************************************************************** | |
2 | * | |
3 | * Module Name: evregion - ACPI address_space (op_region) handler dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2006, R. Byron Moore | |
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 | #include <acpi/acinterp.h> | |
48 | ||
49 | #define _COMPONENT ACPI_EVENTS | |
50 | ACPI_MODULE_NAME("evregion") | |
51 | #define ACPI_NUM_DEFAULT_SPACES 4 | |
52 | static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = { | |
53 | ACPI_ADR_SPACE_SYSTEM_MEMORY, | |
54 | ACPI_ADR_SPACE_SYSTEM_IO, | |
55 | ACPI_ADR_SPACE_PCI_CONFIG, | |
56 | ACPI_ADR_SPACE_DATA_TABLE | |
57 | }; | |
58 | ||
59 | /* Local prototypes */ | |
60 | ||
61 | static acpi_status | |
62 | acpi_ev_reg_run(acpi_handle obj_handle, | |
63 | u32 level, void *context, void **return_value); | |
64 | ||
65 | static acpi_status | |
66 | acpi_ev_install_handler(acpi_handle obj_handle, | |
67 | u32 level, void *context, void **return_value); | |
68 | ||
69 | /******************************************************************************* | |
70 | * | |
71 | * FUNCTION: acpi_ev_install_region_handlers | |
72 | * | |
73 | * PARAMETERS: None | |
74 | * | |
75 | * RETURN: Status | |
76 | * | |
77 | * DESCRIPTION: Installs the core subsystem default address space handlers. | |
78 | * | |
79 | ******************************************************************************/ | |
80 | ||
81 | acpi_status acpi_ev_install_region_handlers(void) | |
82 | { | |
83 | acpi_status status; | |
84 | acpi_native_uint i; | |
85 | ||
86 | ACPI_FUNCTION_TRACE("ev_install_region_handlers"); | |
87 | ||
88 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
89 | if (ACPI_FAILURE(status)) { | |
90 | return_ACPI_STATUS(status); | |
91 | } | |
92 | ||
93 | /* | |
94 | * All address spaces (PCI Config, EC, SMBus) are scope dependent | |
95 | * and registration must occur for a specific device. | |
96 | * | |
97 | * In the case of the system memory and IO address spaces there is currently | |
98 | * no device associated with the address space. For these we use the root. | |
99 | * | |
100 | * We install the default PCI config space handler at the root so | |
101 | * that this space is immediately available even though the we have | |
102 | * not enumerated all the PCI Root Buses yet. This is to conform | |
103 | * to the ACPI specification which states that the PCI config | |
104 | * space must be always available -- even though we are nowhere | |
105 | * near ready to find the PCI root buses at this point. | |
106 | * | |
107 | * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler | |
108 | * has already been installed (via acpi_install_address_space_handler). | |
109 | * Similar for AE_SAME_HANDLER. | |
110 | */ | |
111 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
112 | status = acpi_ev_install_space_handler(acpi_gbl_root_node, | |
113 | acpi_gbl_default_address_spaces | |
114 | [i], | |
115 | ACPI_DEFAULT_HANDLER, | |
116 | NULL, NULL); | |
117 | switch (status) { | |
118 | case AE_OK: | |
119 | case AE_SAME_HANDLER: | |
120 | case AE_ALREADY_EXISTS: | |
121 | ||
122 | /* These exceptions are all OK */ | |
123 | ||
124 | status = AE_OK; | |
125 | break; | |
126 | ||
127 | default: | |
128 | ||
129 | goto unlock_and_exit; | |
130 | } | |
131 | } | |
132 | ||
133 | unlock_and_exit: | |
134 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
135 | return_ACPI_STATUS(status); | |
136 | } | |
137 | ||
138 | /******************************************************************************* | |
139 | * | |
140 | * FUNCTION: acpi_ev_initialize_op_regions | |
141 | * | |
142 | * PARAMETERS: None | |
143 | * | |
144 | * RETURN: Status | |
145 | * | |
146 | * DESCRIPTION: Execute _REG methods for all Operation Regions that have | |
147 | * an installed default region handler. | |
148 | * | |
149 | ******************************************************************************/ | |
150 | ||
151 | acpi_status acpi_ev_initialize_op_regions(void) | |
152 | { | |
153 | acpi_status status; | |
154 | acpi_native_uint i; | |
155 | ||
156 | ACPI_FUNCTION_TRACE("ev_initialize_op_regions"); | |
157 | ||
158 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
159 | if (ACPI_FAILURE(status)) { | |
160 | return_ACPI_STATUS(status); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Run the _REG methods for op_regions in each default address space | |
165 | */ | |
166 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
167 | ||
168 | /* TBD: Make sure handler is the DEFAULT handler, otherwise | |
169 | * _REG will have already been run. | |
170 | */ | |
171 | status = acpi_ev_execute_reg_methods(acpi_gbl_root_node, | |
172 | acpi_gbl_default_address_spaces | |
173 | [i]); | |
174 | } | |
175 | ||
176 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
177 | return_ACPI_STATUS(status); | |
178 | } | |
179 | ||
180 | /******************************************************************************* | |
181 | * | |
182 | * FUNCTION: acpi_ev_execute_reg_method | |
183 | * | |
184 | * PARAMETERS: region_obj - Region object | |
185 | * Function - Passed to _REG: On (1) or Off (0) | |
186 | * | |
187 | * RETURN: Status | |
188 | * | |
189 | * DESCRIPTION: Execute _REG method for a region | |
190 | * | |
191 | ******************************************************************************/ | |
192 | ||
193 | acpi_status | |
194 | acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) | |
195 | { | |
196 | struct acpi_parameter_info info; | |
197 | union acpi_operand_object *params[3]; | |
198 | union acpi_operand_object *region_obj2; | |
199 | acpi_status status; | |
200 | ||
201 | ACPI_FUNCTION_TRACE("ev_execute_reg_method"); | |
202 | ||
203 | region_obj2 = acpi_ns_get_secondary_object(region_obj); | |
204 | if (!region_obj2) { | |
205 | return_ACPI_STATUS(AE_NOT_EXIST); | |
206 | } | |
207 | ||
208 | if (region_obj2->extra.method_REG == NULL) { | |
209 | return_ACPI_STATUS(AE_OK); | |
210 | } | |
211 | ||
212 | /* | |
213 | * The _REG method has two arguments: | |
214 | * | |
215 | * Arg0, Integer: Operation region space ID | |
216 | * Same value as region_obj->Region.space_id | |
217 | * Arg1, Integer: connection status | |
218 | * 1 for connecting the handler, | |
219 | * 0 for disconnecting the handler | |
220 | * Passed as a parameter | |
221 | */ | |
222 | params[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); | |
223 | if (!params[0]) { | |
224 | return_ACPI_STATUS(AE_NO_MEMORY); | |
225 | } | |
226 | ||
227 | params[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); | |
228 | if (!params[1]) { | |
229 | status = AE_NO_MEMORY; | |
230 | goto cleanup; | |
231 | } | |
232 | ||
233 | /* Setup the parameter objects */ | |
234 | ||
235 | params[0]->integer.value = region_obj->region.space_id; | |
236 | params[1]->integer.value = function; | |
237 | params[2] = NULL; | |
238 | ||
239 | info.node = region_obj2->extra.method_REG; | |
240 | info.parameters = params; | |
241 | info.parameter_type = ACPI_PARAM_ARGS; | |
242 | ||
243 | /* Execute the method, no return value */ | |
244 | ||
245 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname | |
246 | (ACPI_TYPE_METHOD, info.node, NULL)); | |
247 | status = acpi_ns_evaluate_by_handle(&info); | |
248 | ||
249 | acpi_ut_remove_reference(params[1]); | |
250 | ||
251 | cleanup: | |
252 | acpi_ut_remove_reference(params[0]); | |
253 | return_ACPI_STATUS(status); | |
254 | } | |
255 | ||
256 | /******************************************************************************* | |
257 | * | |
258 | * FUNCTION: acpi_ev_address_space_dispatch | |
259 | * | |
260 | * PARAMETERS: region_obj - Internal region object | |
261 | * Function - Read or Write operation | |
262 | * Address - Where in the space to read or write | |
263 | * bit_width - Field width in bits (8, 16, 32, or 64) | |
264 | * Value - Pointer to in or out value | |
265 | * | |
266 | * RETURN: Status | |
267 | * | |
268 | * DESCRIPTION: Dispatch an address space or operation region access to | |
269 | * a previously installed handler. | |
270 | * | |
271 | ******************************************************************************/ | |
272 | ||
273 | acpi_status | |
274 | acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, | |
275 | u32 function, | |
276 | acpi_physical_address address, | |
277 | u32 bit_width, void *value) | |
278 | { | |
279 | acpi_status status; | |
280 | acpi_status status2; | |
281 | acpi_adr_space_handler handler; | |
282 | acpi_adr_space_setup region_setup; | |
283 | union acpi_operand_object *handler_desc; | |
284 | union acpi_operand_object *region_obj2; | |
285 | void *region_context = NULL; | |
286 | ||
287 | ACPI_FUNCTION_TRACE("ev_address_space_dispatch"); | |
288 | ||
289 | region_obj2 = acpi_ns_get_secondary_object(region_obj); | |
290 | if (!region_obj2) { | |
291 | return_ACPI_STATUS(AE_NOT_EXIST); | |
292 | } | |
293 | ||
294 | /* Ensure that there is a handler associated with this region */ | |
295 | ||
296 | handler_desc = region_obj->region.handler; | |
297 | if (!handler_desc) { | |
298 | ACPI_ERROR((AE_INFO, | |
299 | "No handler for Region [%4.4s] (%p) [%s]", | |
300 | acpi_ut_get_node_name(region_obj->region.node), | |
301 | region_obj, | |
302 | acpi_ut_get_region_name(region_obj->region. | |
303 | space_id))); | |
304 | ||
305 | return_ACPI_STATUS(AE_NOT_EXIST); | |
306 | } | |
307 | ||
308 | /* | |
309 | * It may be the case that the region has never been initialized | |
310 | * Some types of regions require special init code | |
311 | */ | |
312 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
313 | /* | |
314 | * This region has not been initialized yet, do it | |
315 | */ | |
316 | region_setup = handler_desc->address_space.setup; | |
317 | if (!region_setup) { | |
318 | ||
319 | /* No initialization routine, exit with error */ | |
320 | ||
321 | ACPI_ERROR((AE_INFO, | |
322 | "No init routine for region(%p) [%s]", | |
323 | region_obj, | |
324 | acpi_ut_get_region_name(region_obj->region. | |
325 | space_id))); | |
326 | return_ACPI_STATUS(AE_NOT_EXIST); | |
327 | } | |
328 | ||
329 | /* | |
330 | * We must exit the interpreter because the region | |
331 | * setup will potentially execute control methods | |
332 | * (e.g., _REG method for this region) | |
333 | */ | |
334 | acpi_ex_exit_interpreter(); | |
335 | ||
336 | status = region_setup(region_obj, ACPI_REGION_ACTIVATE, | |
337 | handler_desc->address_space.context, | |
338 | ®ion_context); | |
339 | ||
340 | /* Re-enter the interpreter */ | |
341 | ||
342 | status2 = acpi_ex_enter_interpreter(); | |
343 | if (ACPI_FAILURE(status2)) { | |
344 | return_ACPI_STATUS(status2); | |
345 | } | |
346 | ||
347 | /* Check for failure of the Region Setup */ | |
348 | ||
349 | if (ACPI_FAILURE(status)) { | |
350 | ACPI_EXCEPTION((AE_INFO, status, | |
351 | "During region initialization: [%s]", | |
352 | acpi_ut_get_region_name(region_obj-> | |
353 | region. | |
354 | space_id))); | |
355 | return_ACPI_STATUS(status); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Region initialization may have been completed by region_setup | |
360 | */ | |
361 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
362 | region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; | |
363 | ||
364 | if (region_obj2->extra.region_context) { | |
365 | ||
366 | /* The handler for this region was already installed */ | |
367 | ||
368 | ACPI_FREE(region_context); | |
369 | } else { | |
370 | /* | |
371 | * Save the returned context for use in all accesses to | |
372 | * this particular region | |
373 | */ | |
374 | region_obj2->extra.region_context = | |
375 | region_context; | |
376 | } | |
377 | } | |
378 | } | |
379 | ||
380 | /* We have everything we need, we can invoke the address space handler */ | |
381 | ||
382 | handler = handler_desc->address_space.handler; | |
383 | ||
384 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
385 | "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", | |
386 | ®ion_obj->region.handler->address_space, handler, | |
387 | ACPI_FORMAT_UINT64(address), | |
388 | acpi_ut_get_region_name(region_obj->region. | |
389 | space_id))); | |
390 | ||
391 | if (!(handler_desc->address_space.handler_flags & | |
392 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
393 | /* | |
394 | * For handlers other than the default (supplied) handlers, we must | |
395 | * exit the interpreter because the handler *might* block -- we don't | |
396 | * know what it will do, so we can't hold the lock on the intepreter. | |
397 | */ | |
398 | acpi_ex_exit_interpreter(); | |
399 | } | |
400 | ||
401 | /* Call the handler */ | |
402 | ||
403 | status = handler(function, address, bit_width, value, | |
404 | handler_desc->address_space.context, | |
405 | region_obj2->extra.region_context); | |
406 | ||
407 | if (ACPI_FAILURE(status)) { | |
408 | ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", | |
409 | acpi_ut_get_region_name(region_obj->region. | |
410 | space_id))); | |
411 | } | |
412 | ||
413 | if (!(handler_desc->address_space.handler_flags & | |
414 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
415 | /* | |
416 | * We just returned from a non-default handler, we must re-enter the | |
417 | * interpreter | |
418 | */ | |
419 | status2 = acpi_ex_enter_interpreter(); | |
420 | if (ACPI_FAILURE(status2)) { | |
421 | return_ACPI_STATUS(status2); | |
422 | } | |
423 | } | |
424 | ||
425 | return_ACPI_STATUS(status); | |
426 | } | |
427 | ||
428 | /******************************************************************************* | |
429 | * | |
430 | * FUNCTION: acpi_ev_detach_region | |
431 | * | |
432 | * PARAMETERS: region_obj - Region Object | |
433 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
434 | * | |
435 | * RETURN: None | |
436 | * | |
437 | * DESCRIPTION: Break the association between the handler and the region | |
438 | * this is a two way association. | |
439 | * | |
440 | ******************************************************************************/ | |
441 | ||
442 | void | |
443 | acpi_ev_detach_region(union acpi_operand_object *region_obj, | |
444 | u8 acpi_ns_is_locked) | |
445 | { | |
446 | union acpi_operand_object *handler_obj; | |
447 | union acpi_operand_object *obj_desc; | |
448 | union acpi_operand_object **last_obj_ptr; | |
449 | acpi_adr_space_setup region_setup; | |
450 | void **region_context; | |
451 | union acpi_operand_object *region_obj2; | |
452 | acpi_status status; | |
453 | ||
454 | ACPI_FUNCTION_TRACE("ev_detach_region"); | |
455 | ||
456 | region_obj2 = acpi_ns_get_secondary_object(region_obj); | |
457 | if (!region_obj2) { | |
458 | return_VOID; | |
459 | } | |
460 | region_context = ®ion_obj2->extra.region_context; | |
461 | ||
462 | /* Get the address handler from the region object */ | |
463 | ||
464 | handler_obj = region_obj->region.handler; | |
465 | if (!handler_obj) { | |
466 | ||
467 | /* This region has no handler, all done */ | |
468 | ||
469 | return_VOID; | |
470 | } | |
471 | ||
472 | /* Find this region in the handler's list */ | |
473 | ||
474 | obj_desc = handler_obj->address_space.region_list; | |
475 | last_obj_ptr = &handler_obj->address_space.region_list; | |
476 | ||
477 | while (obj_desc) { | |
478 | ||
479 | /* Is this the correct Region? */ | |
480 | ||
481 | if (obj_desc == region_obj) { | |
482 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
483 | "Removing Region %p from address handler %p\n", | |
484 | region_obj, handler_obj)); | |
485 | ||
486 | /* This is it, remove it from the handler's list */ | |
487 | ||
488 | *last_obj_ptr = obj_desc->region.next; | |
489 | obj_desc->region.next = NULL; /* Must clear field */ | |
490 | ||
491 | if (acpi_ns_is_locked) { | |
492 | status = | |
493 | acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
494 | if (ACPI_FAILURE(status)) { | |
495 | return_VOID; | |
496 | } | |
497 | } | |
498 | ||
499 | /* Now stop region accesses by executing the _REG method */ | |
500 | ||
501 | status = acpi_ev_execute_reg_method(region_obj, 0); | |
502 | if (ACPI_FAILURE(status)) { | |
503 | ACPI_EXCEPTION((AE_INFO, status, | |
504 | "from region _REG, [%s]", | |
505 | acpi_ut_get_region_name | |
506 | (region_obj->region.space_id))); | |
507 | } | |
508 | ||
509 | if (acpi_ns_is_locked) { | |
510 | status = | |
511 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
512 | if (ACPI_FAILURE(status)) { | |
513 | return_VOID; | |
514 | } | |
515 | } | |
516 | ||
517 | /* Call the setup handler with the deactivate notification */ | |
518 | ||
519 | region_setup = handler_obj->address_space.setup; | |
520 | status = | |
521 | region_setup(region_obj, ACPI_REGION_DEACTIVATE, | |
522 | handler_obj->address_space.context, | |
523 | region_context); | |
524 | ||
525 | /* Init routine may fail, Just ignore errors */ | |
526 | ||
527 | if (ACPI_FAILURE(status)) { | |
528 | ACPI_EXCEPTION((AE_INFO, status, | |
529 | "from region init, [%s]", | |
530 | acpi_ut_get_region_name | |
531 | (region_obj->region.space_id))); | |
532 | } | |
533 | ||
534 | region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE); | |
535 | ||
536 | /* | |
537 | * Remove handler reference in the region | |
538 | * | |
539 | * NOTE: this doesn't mean that the region goes away | |
540 | * The region is just inaccessible as indicated to | |
541 | * the _REG method | |
542 | * | |
543 | * If the region is on the handler's list | |
544 | * this better be the region's handler | |
545 | */ | |
546 | region_obj->region.handler = NULL; | |
547 | acpi_ut_remove_reference(handler_obj); | |
548 | ||
549 | return_VOID; | |
550 | } | |
551 | ||
552 | /* Walk the linked list of handlers */ | |
553 | ||
554 | last_obj_ptr = &obj_desc->region.next; | |
555 | obj_desc = obj_desc->region.next; | |
556 | } | |
557 | ||
558 | /* If we get here, the region was not in the handler's region list */ | |
559 | ||
560 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
561 | "Cannot remove region %p from address handler %p\n", | |
562 | region_obj, handler_obj)); | |
563 | ||
564 | return_VOID; | |
565 | } | |
566 | ||
567 | /******************************************************************************* | |
568 | * | |
569 | * FUNCTION: acpi_ev_attach_region | |
570 | * | |
571 | * PARAMETERS: handler_obj - Handler Object | |
572 | * region_obj - Region Object | |
573 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
574 | * | |
575 | * RETURN: None | |
576 | * | |
577 | * DESCRIPTION: Create the association between the handler and the region | |
578 | * this is a two way association. | |
579 | * | |
580 | ******************************************************************************/ | |
581 | ||
582 | acpi_status | |
583 | acpi_ev_attach_region(union acpi_operand_object *handler_obj, | |
584 | union acpi_operand_object *region_obj, | |
585 | u8 acpi_ns_is_locked) | |
586 | { | |
587 | ||
588 | ACPI_FUNCTION_TRACE("ev_attach_region"); | |
589 | ||
590 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
591 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", | |
592 | acpi_ut_get_node_name(region_obj->region.node), | |
593 | region_obj, handler_obj, | |
594 | acpi_ut_get_region_name(region_obj->region. | |
595 | space_id))); | |
596 | ||
597 | /* Link this region to the front of the handler's list */ | |
598 | ||
599 | region_obj->region.next = handler_obj->address_space.region_list; | |
600 | handler_obj->address_space.region_list = region_obj; | |
601 | ||
602 | /* Install the region's handler */ | |
603 | ||
604 | if (region_obj->region.handler) { | |
605 | return_ACPI_STATUS(AE_ALREADY_EXISTS); | |
606 | } | |
607 | ||
608 | region_obj->region.handler = handler_obj; | |
609 | acpi_ut_add_reference(handler_obj); | |
610 | ||
611 | return_ACPI_STATUS(AE_OK); | |
612 | } | |
613 | ||
614 | /******************************************************************************* | |
615 | * | |
616 | * FUNCTION: acpi_ev_install_handler | |
617 | * | |
618 | * PARAMETERS: walk_namespace callback | |
619 | * | |
620 | * DESCRIPTION: This routine installs an address handler into objects that are | |
621 | * of type Region or Device. | |
622 | * | |
623 | * If the Object is a Device, and the device has a handler of | |
624 | * the same type then the search is terminated in that branch. | |
625 | * | |
626 | * This is because the existing handler is closer in proximity | |
627 | * to any more regions than the one we are trying to install. | |
628 | * | |
629 | ******************************************************************************/ | |
630 | ||
631 | static acpi_status | |
632 | acpi_ev_install_handler(acpi_handle obj_handle, | |
633 | u32 level, void *context, void **return_value) | |
634 | { | |
635 | union acpi_operand_object *handler_obj; | |
636 | union acpi_operand_object *next_handler_obj; | |
637 | union acpi_operand_object *obj_desc; | |
638 | struct acpi_namespace_node *node; | |
639 | acpi_status status; | |
640 | ||
641 | ACPI_FUNCTION_NAME("ev_install_handler"); | |
642 | ||
643 | handler_obj = (union acpi_operand_object *)context; | |
644 | ||
645 | /* Parameter validation */ | |
646 | ||
647 | if (!handler_obj) { | |
648 | return (AE_OK); | |
649 | } | |
650 | ||
651 | /* Convert and validate the device handle */ | |
652 | ||
653 | node = acpi_ns_map_handle_to_node(obj_handle); | |
654 | if (!node) { | |
655 | return (AE_BAD_PARAMETER); | |
656 | } | |
657 | ||
658 | /* | |
659 | * We only care about regions.and objects | |
660 | * that are allowed to have address space handlers | |
661 | */ | |
662 | if ((node->type != ACPI_TYPE_DEVICE) && | |
663 | (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { | |
664 | return (AE_OK); | |
665 | } | |
666 | ||
667 | /* Check for an existing internal object */ | |
668 | ||
669 | obj_desc = acpi_ns_get_attached_object(node); | |
670 | if (!obj_desc) { | |
671 | ||
672 | /* No object, just exit */ | |
673 | ||
674 | return (AE_OK); | |
675 | } | |
676 | ||
677 | /* Devices are handled different than regions */ | |
678 | ||
679 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) { | |
680 | ||
681 | /* Check if this Device already has a handler for this address space */ | |
682 | ||
683 | next_handler_obj = obj_desc->device.handler; | |
684 | while (next_handler_obj) { | |
685 | ||
686 | /* Found a handler, is it for the same address space? */ | |
687 | ||
688 | if (next_handler_obj->address_space.space_id == | |
689 | handler_obj->address_space.space_id) { | |
690 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
691 | "Found handler for region [%s] in device %p(%p) handler %p\n", | |
692 | acpi_ut_get_region_name | |
693 | (handler_obj->address_space. | |
694 | space_id), obj_desc, | |
695 | next_handler_obj, | |
696 | handler_obj)); | |
697 | ||
698 | /* | |
699 | * Since the object we found it on was a device, then it | |
700 | * means that someone has already installed a handler for | |
701 | * the branch of the namespace from this device on. Just | |
702 | * bail out telling the walk routine to not traverse this | |
703 | * branch. This preserves the scoping rule for handlers. | |
704 | */ | |
705 | return (AE_CTRL_DEPTH); | |
706 | } | |
707 | ||
708 | /* Walk the linked list of handlers attached to this device */ | |
709 | ||
710 | next_handler_obj = next_handler_obj->address_space.next; | |
711 | } | |
712 | ||
713 | /* | |
714 | * As long as the device didn't have a handler for this | |
715 | * space we don't care about it. We just ignore it and | |
716 | * proceed. | |
717 | */ | |
718 | return (AE_OK); | |
719 | } | |
720 | ||
721 | /* Object is a Region */ | |
722 | ||
723 | if (obj_desc->region.space_id != handler_obj->address_space.space_id) { | |
724 | /* | |
725 | * This region is for a different address space | |
726 | * -- just ignore it | |
727 | */ | |
728 | return (AE_OK); | |
729 | } | |
730 | ||
731 | /* | |
732 | * Now we have a region and it is for the handler's address | |
733 | * space type. | |
734 | * | |
735 | * First disconnect region for any previous handler (if any) | |
736 | */ | |
737 | acpi_ev_detach_region(obj_desc, FALSE); | |
738 | ||
739 | /* Connect the region to the new handler */ | |
740 | ||
741 | status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE); | |
742 | return (status); | |
743 | } | |
744 | ||
745 | /******************************************************************************* | |
746 | * | |
747 | * FUNCTION: acpi_ev_install_space_handler | |
748 | * | |
749 | * PARAMETERS: Node - Namespace node for the device | |
750 | * space_id - The address space ID | |
751 | * Handler - Address of the handler | |
752 | * Setup - Address of the setup function | |
753 | * Context - Value passed to the handler on each access | |
754 | * | |
755 | * RETURN: Status | |
756 | * | |
757 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
758 | * Assumes namespace is locked | |
759 | * | |
760 | ******************************************************************************/ | |
761 | ||
762 | acpi_status | |
763 | acpi_ev_install_space_handler(struct acpi_namespace_node * node, | |
764 | acpi_adr_space_type space_id, | |
765 | acpi_adr_space_handler handler, | |
766 | acpi_adr_space_setup setup, void *context) | |
767 | { | |
768 | union acpi_operand_object *obj_desc; | |
769 | union acpi_operand_object *handler_obj; | |
770 | acpi_status status; | |
771 | acpi_object_type type; | |
772 | u8 flags = 0; | |
773 | ||
774 | ACPI_FUNCTION_TRACE("ev_install_space_handler"); | |
775 | ||
776 | /* | |
777 | * This registration is valid for only the types below | |
778 | * and the root. This is where the default handlers | |
779 | * get placed. | |
780 | */ | |
781 | if ((node->type != ACPI_TYPE_DEVICE) && | |
782 | (node->type != ACPI_TYPE_PROCESSOR) && | |
783 | (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) { | |
784 | status = AE_BAD_PARAMETER; | |
785 | goto unlock_and_exit; | |
786 | } | |
787 | ||
788 | if (handler == ACPI_DEFAULT_HANDLER) { | |
789 | flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; | |
790 | ||
791 | switch (space_id) { | |
792 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
793 | handler = acpi_ex_system_memory_space_handler; | |
794 | setup = acpi_ev_system_memory_region_setup; | |
795 | break; | |
796 | ||
797 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
798 | handler = acpi_ex_system_io_space_handler; | |
799 | setup = acpi_ev_io_space_region_setup; | |
800 | break; | |
801 | ||
802 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
803 | handler = acpi_ex_pci_config_space_handler; | |
804 | setup = acpi_ev_pci_config_region_setup; | |
805 | break; | |
806 | ||
807 | case ACPI_ADR_SPACE_CMOS: | |
808 | handler = acpi_ex_cmos_space_handler; | |
809 | setup = acpi_ev_cmos_region_setup; | |
810 | break; | |
811 | ||
812 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
813 | handler = acpi_ex_pci_bar_space_handler; | |
814 | setup = acpi_ev_pci_bar_region_setup; | |
815 | break; | |
816 | ||
817 | case ACPI_ADR_SPACE_DATA_TABLE: | |
818 | handler = acpi_ex_data_table_space_handler; | |
819 | setup = NULL; | |
820 | break; | |
821 | ||
822 | default: | |
823 | status = AE_BAD_PARAMETER; | |
824 | goto unlock_and_exit; | |
825 | } | |
826 | } | |
827 | ||
828 | /* If the caller hasn't specified a setup routine, use the default */ | |
829 | ||
830 | if (!setup) { | |
831 | setup = acpi_ev_default_region_setup; | |
832 | } | |
833 | ||
834 | /* Check for an existing internal object */ | |
835 | ||
836 | obj_desc = acpi_ns_get_attached_object(node); | |
837 | if (obj_desc) { | |
838 | /* | |
839 | * The attached device object already exists. | |
840 | * Make sure the handler is not already installed. | |
841 | */ | |
842 | handler_obj = obj_desc->device.handler; | |
843 | ||
844 | /* Walk the handler list for this device */ | |
845 | ||
846 | while (handler_obj) { | |
847 | ||
848 | /* Same space_id indicates a handler already installed */ | |
849 | ||
850 | if (handler_obj->address_space.space_id == space_id) { | |
851 | if (handler_obj->address_space.handler == | |
852 | handler) { | |
853 | /* | |
854 | * It is (relatively) OK to attempt to install the SAME | |
855 | * handler twice. This can easily happen | |
856 | * with PCI_Config space. | |
857 | */ | |
858 | status = AE_SAME_HANDLER; | |
859 | goto unlock_and_exit; | |
860 | } else { | |
861 | /* A handler is already installed */ | |
862 | ||
863 | status = AE_ALREADY_EXISTS; | |
864 | } | |
865 | goto unlock_and_exit; | |
866 | } | |
867 | ||
868 | /* Walk the linked list of handlers */ | |
869 | ||
870 | handler_obj = handler_obj->address_space.next; | |
871 | } | |
872 | } else { | |
873 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
874 | "Creating object on Device %p while installing handler\n", | |
875 | node)); | |
876 | ||
877 | /* obj_desc does not exist, create one */ | |
878 | ||
879 | if (node->type == ACPI_TYPE_ANY) { | |
880 | type = ACPI_TYPE_DEVICE; | |
881 | } else { | |
882 | type = node->type; | |
883 | } | |
884 | ||
885 | obj_desc = acpi_ut_create_internal_object(type); | |
886 | if (!obj_desc) { | |
887 | status = AE_NO_MEMORY; | |
888 | goto unlock_and_exit; | |
889 | } | |
890 | ||
891 | /* Init new descriptor */ | |
892 | ||
893 | obj_desc->common.type = (u8) type; | |
894 | ||
895 | /* Attach the new object to the Node */ | |
896 | ||
897 | status = acpi_ns_attach_object(node, obj_desc, type); | |
898 | ||
899 | /* Remove local reference to the object */ | |
900 | ||
901 | acpi_ut_remove_reference(obj_desc); | |
902 | ||
903 | if (ACPI_FAILURE(status)) { | |
904 | goto unlock_and_exit; | |
905 | } | |
906 | } | |
907 | ||
908 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
909 | "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", | |
910 | acpi_ut_get_region_name(space_id), space_id, | |
911 | acpi_ut_get_node_name(node), node, obj_desc)); | |
912 | ||
913 | /* | |
914 | * Install the handler | |
915 | * | |
916 | * At this point there is no existing handler. | |
917 | * Just allocate the object for the handler and link it | |
918 | * into the list. | |
919 | */ | |
920 | handler_obj = | |
921 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER); | |
922 | if (!handler_obj) { | |
923 | status = AE_NO_MEMORY; | |
924 | goto unlock_and_exit; | |
925 | } | |
926 | ||
927 | /* Init handler obj */ | |
928 | ||
929 | handler_obj->address_space.space_id = (u8) space_id; | |
930 | handler_obj->address_space.handler_flags = flags; | |
931 | handler_obj->address_space.region_list = NULL; | |
932 | handler_obj->address_space.node = node; | |
933 | handler_obj->address_space.handler = handler; | |
934 | handler_obj->address_space.context = context; | |
935 | handler_obj->address_space.setup = setup; | |
936 | ||
937 | /* Install at head of Device.address_space list */ | |
938 | ||
939 | handler_obj->address_space.next = obj_desc->device.handler; | |
940 | ||
941 | /* | |
942 | * The Device object is the first reference on the handler_obj. | |
943 | * Each region that uses the handler adds a reference. | |
944 | */ | |
945 | obj_desc->device.handler = handler_obj; | |
946 | ||
947 | /* | |
948 | * Walk the namespace finding all of the regions this | |
949 | * handler will manage. | |
950 | * | |
951 | * Start at the device and search the branch toward | |
952 | * the leaf nodes until either the leaf is encountered or | |
953 | * a device is detected that has an address handler of the | |
954 | * same type. | |
955 | * | |
956 | * In either case, back up and search down the remainder | |
957 | * of the branch | |
958 | */ | |
959 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, | |
960 | ACPI_NS_WALK_UNLOCK, | |
961 | acpi_ev_install_handler, handler_obj, | |
962 | NULL); | |
963 | ||
964 | unlock_and_exit: | |
965 | return_ACPI_STATUS(status); | |
966 | } | |
967 | ||
968 | /******************************************************************************* | |
969 | * | |
970 | * FUNCTION: acpi_ev_execute_reg_methods | |
971 | * | |
972 | * PARAMETERS: Node - Namespace node for the device | |
973 | * space_id - The address space ID | |
974 | * | |
975 | * RETURN: Status | |
976 | * | |
977 | * DESCRIPTION: Run all _REG methods for the input Space ID; | |
978 | * Note: assumes namespace is locked, or system init time. | |
979 | * | |
980 | ******************************************************************************/ | |
981 | ||
982 | acpi_status | |
983 | acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, | |
984 | acpi_adr_space_type space_id) | |
985 | { | |
986 | acpi_status status; | |
987 | ||
988 | ACPI_FUNCTION_TRACE("ev_execute_reg_methods"); | |
989 | ||
990 | /* | |
991 | * Run all _REG methods for all Operation Regions for this | |
992 | * space ID. This is a separate walk in order to handle any | |
993 | * interdependencies between regions and _REG methods. (i.e. handlers | |
994 | * must be installed for all regions of this Space ID before we | |
995 | * can run any _REG methods) | |
996 | */ | |
997 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, | |
998 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, | |
999 | &space_id, NULL); | |
1000 | ||
1001 | return_ACPI_STATUS(status); | |
1002 | } | |
1003 | ||
1004 | /******************************************************************************* | |
1005 | * | |
1006 | * FUNCTION: acpi_ev_reg_run | |
1007 | * | |
1008 | * PARAMETERS: walk_namespace callback | |
1009 | * | |
1010 | * DESCRIPTION: Run _REg method for region objects of the requested space_iD | |
1011 | * | |
1012 | ******************************************************************************/ | |
1013 | ||
1014 | static acpi_status | |
1015 | acpi_ev_reg_run(acpi_handle obj_handle, | |
1016 | u32 level, void *context, void **return_value) | |
1017 | { | |
1018 | union acpi_operand_object *obj_desc; | |
1019 | struct acpi_namespace_node *node; | |
1020 | acpi_adr_space_type space_id; | |
1021 | acpi_status status; | |
1022 | ||
1023 | space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); | |
1024 | ||
1025 | /* Convert and validate the device handle */ | |
1026 | ||
1027 | node = acpi_ns_map_handle_to_node(obj_handle); | |
1028 | if (!node) { | |
1029 | return (AE_BAD_PARAMETER); | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * We only care about regions.and objects | |
1034 | * that are allowed to have address space handlers | |
1035 | */ | |
1036 | if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { | |
1037 | return (AE_OK); | |
1038 | } | |
1039 | ||
1040 | /* Check for an existing internal object */ | |
1041 | ||
1042 | obj_desc = acpi_ns_get_attached_object(node); | |
1043 | if (!obj_desc) { | |
1044 | ||
1045 | /* No object, just exit */ | |
1046 | ||
1047 | return (AE_OK); | |
1048 | } | |
1049 | ||
1050 | /* Object is a Region */ | |
1051 | ||
1052 | if (obj_desc->region.space_id != space_id) { | |
1053 | /* | |
1054 | * This region is for a different address space | |
1055 | * -- just ignore it | |
1056 | */ | |
1057 | return (AE_OK); | |
1058 | } | |
1059 | ||
1060 | status = acpi_ev_execute_reg_method(obj_desc, 1); | |
1061 | return (status); | |
1062 | } |