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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evregion - ACPI address_space (op_region) handler dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, 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 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acevents.h> | |
47 | #include <acpi/acnamesp.h> | |
48 | #include <acpi/acinterp.h> | |
49 | ||
50 | #define _COMPONENT ACPI_EVENTS | |
51 | ACPI_MODULE_NAME ("evregion") | |
52 | ||
53 | #define ACPI_NUM_DEFAULT_SPACES 4 | |
54 | ||
55 | static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = { | |
56 | ACPI_ADR_SPACE_SYSTEM_MEMORY, | |
57 | ACPI_ADR_SPACE_SYSTEM_IO, | |
58 | ACPI_ADR_SPACE_PCI_CONFIG, | |
59 | ACPI_ADR_SPACE_DATA_TABLE}; | |
60 | ||
61 | ||
62 | /******************************************************************************* | |
63 | * | |
64 | * FUNCTION: acpi_ev_install_region_handlers | |
65 | * | |
66 | * PARAMETERS: None | |
67 | * | |
68 | * RETURN: Status | |
69 | * | |
70 | * DESCRIPTION: Installs the core subsystem default address space handlers. | |
71 | * | |
72 | ******************************************************************************/ | |
73 | ||
74 | acpi_status | |
75 | acpi_ev_install_region_handlers ( | |
76 | void) { | |
77 | acpi_status status; | |
78 | acpi_native_uint i; | |
79 | ||
80 | ||
81 | ACPI_FUNCTION_TRACE ("ev_install_region_handlers"); | |
82 | ||
83 | ||
84 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); | |
85 | if (ACPI_FAILURE (status)) { | |
86 | return_ACPI_STATUS (status); | |
87 | } | |
88 | ||
89 | /* | |
90 | * All address spaces (PCI Config, EC, SMBus) are scope dependent | |
91 | * and registration must occur for a specific device. | |
92 | * | |
93 | * In the case of the system memory and IO address spaces there is currently | |
94 | * no device associated with the address space. For these we use the root. | |
95 | * | |
96 | * We install the default PCI config space handler at the root so | |
97 | * that this space is immediately available even though the we have | |
98 | * not enumerated all the PCI Root Buses yet. This is to conform | |
99 | * to the ACPI specification which states that the PCI config | |
100 | * space must be always available -- even though we are nowhere | |
101 | * near ready to find the PCI root buses at this point. | |
102 | * | |
103 | * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler | |
104 | * has already been installed (via acpi_install_address_space_handler). | |
105 | * Similar for AE_SAME_HANDLER. | |
106 | */ | |
107 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
108 | status = acpi_ev_install_space_handler (acpi_gbl_root_node, | |
109 | acpi_gbl_default_address_spaces[i], | |
110 | ACPI_DEFAULT_HANDLER, NULL, NULL); | |
111 | switch (status) { | |
112 | case AE_OK: | |
113 | case AE_SAME_HANDLER: | |
114 | case AE_ALREADY_EXISTS: | |
115 | ||
116 | /* These exceptions are all OK */ | |
117 | ||
118 | status = AE_OK; | |
119 | break; | |
120 | ||
121 | default: | |
122 | ||
123 | goto unlock_and_exit; | |
124 | } | |
125 | } | |
126 | ||
127 | unlock_and_exit: | |
128 | (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); | |
129 | return_ACPI_STATUS (status); | |
130 | } | |
131 | ||
132 | ||
133 | /******************************************************************************* | |
134 | * | |
135 | * FUNCTION: acpi_ev_initialize_op_regions | |
136 | * | |
137 | * PARAMETERS: None | |
138 | * | |
139 | * RETURN: Status | |
140 | * | |
141 | * DESCRIPTION: Execute _REG methods for all Operation Regions that have | |
142 | * an installed default region handler. | |
143 | * | |
144 | ******************************************************************************/ | |
145 | ||
146 | acpi_status | |
147 | acpi_ev_initialize_op_regions ( | |
148 | void) | |
149 | { | |
150 | acpi_status status; | |
151 | acpi_native_uint i; | |
152 | ||
153 | ||
154 | ACPI_FUNCTION_TRACE ("ev_initialize_op_regions"); | |
155 | ||
156 | ||
157 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); | |
158 | if (ACPI_FAILURE (status)) { | |
159 | return_ACPI_STATUS (status); | |
160 | } | |
161 | ||
162 | /* | |
163 | * Run the _REG methods for op_regions in each default address space | |
164 | */ | |
165 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
166 | /* TBD: Make sure handler is the DEFAULT handler, otherwise | |
167 | * _REG will have already been run. | |
168 | */ | |
169 | status = acpi_ev_execute_reg_methods (acpi_gbl_root_node, | |
170 | acpi_gbl_default_address_spaces[i]); | |
171 | } | |
172 | ||
173 | (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); | |
174 | return_ACPI_STATUS (status); | |
175 | } | |
176 | ||
177 | ||
178 | /******************************************************************************* | |
179 | * | |
180 | * FUNCTION: acpi_ev_execute_reg_method | |
181 | * | |
182 | * PARAMETERS: region_obj - Object structure | |
183 | * Function - Passed to _REG: On (1) or Off (0) | |
184 | * | |
185 | * RETURN: Status | |
186 | * | |
187 | * DESCRIPTION: Execute _REG method for a region | |
188 | * | |
189 | ******************************************************************************/ | |
190 | ||
191 | acpi_status | |
192 | acpi_ev_execute_reg_method ( | |
193 | union acpi_operand_object *region_obj, | |
194 | 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 | ||
202 | ACPI_FUNCTION_TRACE ("ev_execute_reg_method"); | |
203 | ||
204 | ||
205 | region_obj2 = acpi_ns_get_secondary_object (region_obj); | |
206 | if (!region_obj2) { | |
207 | return_ACPI_STATUS (AE_NOT_EXIST); | |
208 | } | |
209 | ||
210 | if (region_obj2->extra.method_REG == NULL) { | |
211 | return_ACPI_STATUS (AE_OK); | |
212 | } | |
213 | ||
214 | /* | |
215 | * The _REG method has two arguments: | |
216 | * | |
217 | * Arg0, Integer: Operation region space ID | |
218 | * Same value as region_obj->Region.space_id | |
219 | * Arg1, Integer: connection status | |
220 | * 1 for connecting the handler, | |
221 | * 0 for disconnecting the handler | |
222 | * Passed as a parameter | |
223 | */ | |
224 | params[0] = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER); | |
225 | if (!params[0]) { | |
226 | return_ACPI_STATUS (AE_NO_MEMORY); | |
227 | } | |
228 | ||
229 | params[1] = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER); | |
230 | if (!params[1]) { | |
231 | status = AE_NO_MEMORY; | |
232 | goto cleanup; | |
233 | } | |
234 | ||
235 | /* Setup the parameter objects */ | |
236 | ||
237 | params[0]->integer.value = region_obj->region.space_id; | |
238 | params[1]->integer.value = function; | |
239 | params[2] = NULL; | |
240 | ||
241 | info.node = region_obj2->extra.method_REG; | |
242 | info.parameters = params; | |
243 | info.parameter_type = ACPI_PARAM_ARGS; | |
244 | ||
245 | /* Execute the method, no return value */ | |
246 | ||
247 | ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname ( | |
248 | ACPI_TYPE_METHOD, info.node, NULL)); | |
249 | status = acpi_ns_evaluate_by_handle (&info); | |
250 | ||
251 | acpi_ut_remove_reference (params[1]); | |
252 | ||
253 | cleanup: | |
254 | acpi_ut_remove_reference (params[0]); | |
255 | ||
256 | return_ACPI_STATUS (status); | |
257 | } | |
258 | ||
259 | ||
260 | /******************************************************************************* | |
261 | * | |
262 | * FUNCTION: acpi_ev_address_space_dispatch | |
263 | * | |
264 | * PARAMETERS: region_obj - Internal region object | |
265 | * Function - Read or Write operation | |
266 | * Address - Where in the space to read or write | |
267 | * bit_width - Field width in bits (8, 16, 32, or 64) | |
268 | * Value - Pointer to in or out value | |
269 | * | |
270 | * RETURN: Status | |
271 | * | |
272 | * DESCRIPTION: Dispatch an address space or operation region access to | |
273 | * a previously installed handler. | |
274 | * | |
275 | ******************************************************************************/ | |
276 | ||
277 | acpi_status | |
278 | acpi_ev_address_space_dispatch ( | |
279 | union acpi_operand_object *region_obj, | |
280 | u32 function, | |
281 | acpi_physical_address address, | |
282 | u32 bit_width, | |
283 | void *value) | |
284 | { | |
285 | acpi_status status; | |
286 | acpi_status status2; | |
287 | acpi_adr_space_handler handler; | |
288 | acpi_adr_space_setup region_setup; | |
289 | union acpi_operand_object *handler_desc; | |
290 | union acpi_operand_object *region_obj2; | |
291 | void *region_context = NULL; | |
292 | ||
293 | ||
294 | ACPI_FUNCTION_TRACE ("ev_address_space_dispatch"); | |
295 | ||
296 | ||
297 | region_obj2 = acpi_ns_get_secondary_object (region_obj); | |
298 | if (!region_obj2) { | |
299 | return_ACPI_STATUS (AE_NOT_EXIST); | |
300 | } | |
301 | ||
302 | /* Ensure that there is a handler associated with this region */ | |
303 | ||
304 | handler_desc = region_obj->region.handler; | |
305 | if (!handler_desc) { | |
306 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
307 | "No handler for Region [%4.4s] (%p) [%s]\n", | |
308 | acpi_ut_get_node_name (region_obj->region.node), | |
309 | region_obj, acpi_ut_get_region_name (region_obj->region.space_id))); | |
310 | ||
311 | return_ACPI_STATUS (AE_NOT_EXIST); | |
312 | } | |
313 | ||
314 | /* | |
315 | * It may be the case that the region has never been initialized | |
316 | * Some types of regions require special init code | |
317 | */ | |
318 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
319 | /* | |
320 | * This region has not been initialized yet, do it | |
321 | */ | |
322 | region_setup = handler_desc->address_space.setup; | |
323 | if (!region_setup) { | |
324 | /* No initialization routine, exit with error */ | |
325 | ||
326 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n", | |
327 | region_obj, acpi_ut_get_region_name (region_obj->region.space_id))); | |
328 | return_ACPI_STATUS (AE_NOT_EXIST); | |
329 | } | |
330 | ||
331 | /* | |
332 | * We must exit the interpreter because the region setup will potentially | |
333 | * execute control methods (e.g., _REG method for this region) | |
334 | */ | |
335 | acpi_ex_exit_interpreter (); | |
336 | ||
337 | status = region_setup (region_obj, ACPI_REGION_ACTIVATE, | |
338 | handler_desc->address_space.context, ®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_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n", | |
351 | acpi_format_exception (status), | |
352 | acpi_ut_get_region_name (region_obj->region.space_id))); | |
353 | return_ACPI_STATUS (status); | |
354 | } | |
355 | ||
356 | /* | |
357 | * Region initialization may have been completed by region_setup | |
358 | */ | |
359 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
360 | region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; | |
361 | ||
362 | if (region_obj2->extra.region_context) { | |
363 | /* The handler for this region was already installed */ | |
364 | ||
365 | ACPI_MEM_FREE (region_context); | |
366 | } | |
367 | else { | |
368 | /* | |
369 | * Save the returned context for use in all accesses to | |
370 | * this particular region | |
371 | */ | |
372 | region_obj2->extra.region_context = region_context; | |
373 | } | |
374 | } | |
375 | } | |
376 | ||
377 | /* We have everything we need, we can invoke the address space handler */ | |
378 | ||
379 | handler = handler_desc->address_space.handler; | |
380 | ||
381 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
382 | "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", | |
383 | ®ion_obj->region.handler->address_space, handler, | |
384 | ACPI_FORMAT_UINT64 (address), | |
385 | acpi_ut_get_region_name (region_obj->region.space_id))); | |
386 | ||
387 | if (!(handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
388 | /* | |
389 | * For handlers other than the default (supplied) handlers, we must | |
390 | * exit the interpreter because the handler *might* block -- we don't | |
391 | * know what it will do, so we can't hold the lock on the intepreter. | |
392 | */ | |
393 | acpi_ex_exit_interpreter(); | |
394 | } | |
395 | ||
396 | /* Call the handler */ | |
397 | ||
398 | status = handler (function, address, bit_width, value, | |
399 | handler_desc->address_space.context, | |
400 | region_obj2->extra.region_context); | |
401 | ||
402 | if (ACPI_FAILURE (status)) { | |
403 | ACPI_REPORT_ERROR (("Handler for [%s] returned %s\n", | |
404 | acpi_ut_get_region_name (region_obj->region.space_id), | |
405 | acpi_format_exception (status))); | |
406 | } | |
407 | ||
408 | if (!(handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
409 | /* | |
410 | * We just returned from a non-default handler, we must re-enter the | |
411 | * interpreter | |
412 | */ | |
413 | status2 = acpi_ex_enter_interpreter (); | |
414 | if (ACPI_FAILURE (status2)) { | |
415 | return_ACPI_STATUS (status2); | |
416 | } | |
417 | } | |
418 | ||
419 | return_ACPI_STATUS (status); | |
420 | } | |
421 | ||
422 | ||
423 | /******************************************************************************* | |
424 | * | |
425 | * FUNCTION: acpi_ev_detach_region | |
426 | * | |
427 | * PARAMETERS: region_obj - Region Object | |
428 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
429 | * | |
430 | * RETURN: None | |
431 | * | |
432 | * DESCRIPTION: Break the association between the handler and the region | |
433 | * this is a two way association. | |
434 | * | |
435 | ******************************************************************************/ | |
436 | ||
437 | void | |
438 | acpi_ev_detach_region( | |
439 | union acpi_operand_object *region_obj, | |
440 | u8 acpi_ns_is_locked) | |
441 | { | |
442 | union acpi_operand_object *handler_obj; | |
443 | union acpi_operand_object *obj_desc; | |
444 | union acpi_operand_object **last_obj_ptr; | |
445 | acpi_adr_space_setup region_setup; | |
446 | void **region_context; | |
447 | union acpi_operand_object *region_obj2; | |
448 | acpi_status status; | |
449 | ||
450 | ||
451 | ACPI_FUNCTION_TRACE ("ev_detach_region"); | |
452 | ||
453 | ||
454 | region_obj2 = acpi_ns_get_secondary_object (region_obj); | |
455 | if (!region_obj2) { | |
456 | return_VOID; | |
457 | } | |
458 | region_context = ®ion_obj2->extra.region_context; | |
459 | ||
460 | /* Get the address handler from the region object */ | |
461 | ||
462 | handler_obj = region_obj->region.handler; | |
463 | if (!handler_obj) { | |
464 | /* This region has no handler, all done */ | |
465 | ||
466 | return_VOID; | |
467 | } | |
468 | ||
469 | /* Find this region in the handler's list */ | |
470 | ||
471 | obj_desc = handler_obj->address_space.region_list; | |
472 | last_obj_ptr = &handler_obj->address_space.region_list; | |
473 | ||
474 | while (obj_desc) { | |
475 | /* Is this the correct Region? */ | |
476 | ||
477 | if (obj_desc == region_obj) { | |
478 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
479 | "Removing Region %p from address handler %p\n", | |
480 | region_obj, handler_obj)); | |
481 | ||
482 | /* This is it, remove it from the handler's list */ | |
483 | ||
484 | *last_obj_ptr = obj_desc->region.next; | |
485 | obj_desc->region.next = NULL; /* Must clear field */ | |
486 | ||
487 | if (acpi_ns_is_locked) { | |
488 | status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); | |
489 | if (ACPI_FAILURE (status)) { | |
490 | return_VOID; | |
491 | } | |
492 | } | |
493 | ||
494 | /* Now stop region accesses by executing the _REG method */ | |
495 | ||
496 | status = acpi_ev_execute_reg_method (region_obj, 0); | |
497 | if (ACPI_FAILURE (status)) { | |
498 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region _REG, [%s]\n", | |
499 | acpi_format_exception (status), | |
500 | acpi_ut_get_region_name (region_obj->region.space_id))); | |
501 | } | |
502 | ||
503 | if (acpi_ns_is_locked) { | |
504 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); | |
505 | if (ACPI_FAILURE (status)) { | |
506 | return_VOID; | |
507 | } | |
508 | } | |
509 | ||
510 | /* Call the setup handler with the deactivate notification */ | |
511 | ||
512 | region_setup = handler_obj->address_space.setup; | |
513 | status = region_setup (region_obj, ACPI_REGION_DEACTIVATE, | |
514 | handler_obj->address_space.context, region_context); | |
515 | ||
516 | /* Init routine may fail, Just ignore errors */ | |
517 | ||
518 | if (ACPI_FAILURE (status)) { | |
519 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region init, [%s]\n", | |
520 | acpi_format_exception (status), | |
521 | acpi_ut_get_region_name (region_obj->region.space_id))); | |
522 | } | |
523 | ||
524 | region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE); | |
525 | ||
526 | /* | |
527 | * Remove handler reference in the region | |
528 | * | |
529 | * NOTE: this doesn't mean that the region goes away | |
530 | * The region is just inaccessible as indicated to | |
531 | * the _REG method | |
532 | * | |
533 | * If the region is on the handler's list | |
534 | * this better be the region's handler | |
535 | */ | |
536 | region_obj->region.handler = NULL; | |
537 | acpi_ut_remove_reference (handler_obj); | |
538 | ||
539 | return_VOID; | |
540 | } | |
541 | ||
542 | /* Walk the linked list of handlers */ | |
543 | ||
544 | last_obj_ptr = &obj_desc->region.next; | |
545 | obj_desc = obj_desc->region.next; | |
546 | } | |
547 | ||
548 | /* If we get here, the region was not in the handler's region list */ | |
549 | ||
550 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
551 | "Cannot remove region %p from address handler %p\n", | |
552 | region_obj, handler_obj)); | |
553 | ||
554 | return_VOID; | |
555 | } | |
556 | ||
557 | ||
558 | /******************************************************************************* | |
559 | * | |
560 | * FUNCTION: acpi_ev_attach_region | |
561 | * | |
562 | * PARAMETERS: handler_obj - Handler Object | |
563 | * region_obj - Region Object | |
564 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
565 | * | |
566 | * RETURN: None | |
567 | * | |
568 | * DESCRIPTION: Create the association between the handler and the region | |
569 | * this is a two way association. | |
570 | * | |
571 | ******************************************************************************/ | |
572 | ||
573 | acpi_status | |
574 | acpi_ev_attach_region ( | |
575 | union acpi_operand_object *handler_obj, | |
576 | union acpi_operand_object *region_obj, | |
577 | u8 acpi_ns_is_locked) | |
578 | { | |
579 | ||
580 | ACPI_FUNCTION_TRACE ("ev_attach_region"); | |
581 | ||
582 | ||
583 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
584 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", | |
585 | acpi_ut_get_node_name (region_obj->region.node), | |
586 | region_obj, handler_obj, | |
587 | acpi_ut_get_region_name (region_obj->region.space_id))); | |
588 | ||
589 | /* Link this region to the front of the handler's list */ | |
590 | ||
591 | region_obj->region.next = handler_obj->address_space.region_list; | |
592 | handler_obj->address_space.region_list = region_obj; | |
593 | ||
594 | /* Install the region's handler */ | |
595 | ||
596 | if (region_obj->region.handler) { | |
597 | return_ACPI_STATUS (AE_ALREADY_EXISTS); | |
598 | } | |
599 | ||
600 | region_obj->region.handler = handler_obj; | |
601 | acpi_ut_add_reference (handler_obj); | |
602 | ||
603 | return_ACPI_STATUS (AE_OK); | |
604 | } | |
605 | ||
606 | ||
607 | /******************************************************************************* | |
608 | * | |
609 | * FUNCTION: acpi_ev_install_handler | |
610 | * | |
611 | * PARAMETERS: walk_namespace callback | |
612 | * | |
613 | * DESCRIPTION: This routine installs an address handler into objects that are | |
614 | * of type Region or Device. | |
615 | * | |
616 | * If the Object is a Device, and the device has a handler of | |
617 | * the same type then the search is terminated in that branch. | |
618 | * | |
619 | * This is because the existing handler is closer in proximity | |
620 | * to any more regions than the one we are trying to install. | |
621 | * | |
622 | ******************************************************************************/ | |
623 | ||
624 | acpi_status | |
625 | acpi_ev_install_handler ( | |
626 | acpi_handle obj_handle, | |
627 | u32 level, | |
628 | void *context, | |
629 | void **return_value) | |
630 | { | |
631 | union acpi_operand_object *handler_obj; | |
632 | union acpi_operand_object *next_handler_obj; | |
633 | union acpi_operand_object *obj_desc; | |
634 | struct acpi_namespace_node *node; | |
635 | acpi_status status; | |
636 | ||
637 | ||
638 | ACPI_FUNCTION_NAME ("ev_install_handler"); | |
639 | ||
640 | ||
641 | handler_obj = (union acpi_operand_object *) context; | |
642 | ||
643 | /* Parameter validation */ | |
644 | ||
645 | if (!handler_obj) { | |
646 | return (AE_OK); | |
647 | } | |
648 | ||
649 | /* Convert and validate the device handle */ | |
650 | ||
651 | node = acpi_ns_map_handle_to_node (obj_handle); | |
652 | if (!node) { | |
653 | return (AE_BAD_PARAMETER); | |
654 | } | |
655 | ||
656 | /* | |
657 | * We only care about regions.and objects | |
658 | * that are allowed to have address space handlers | |
659 | */ | |
660 | if ((node->type != ACPI_TYPE_DEVICE) && | |
661 | (node->type != ACPI_TYPE_REGION) && | |
662 | (node != acpi_gbl_root_node)) { | |
663 | return (AE_OK); | |
664 | } | |
665 | ||
666 | /* Check for an existing internal object */ | |
667 | ||
668 | obj_desc = acpi_ns_get_attached_object (node); | |
669 | if (!obj_desc) { | |
670 | /* No object, just exit */ | |
671 | ||
672 | return (AE_OK); | |
673 | } | |
674 | ||
675 | /* Devices are handled different than regions */ | |
676 | ||
677 | if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_DEVICE) { | |
678 | /* Check if this Device already has a handler for this address space */ | |
679 | ||
680 | next_handler_obj = obj_desc->device.handler; | |
681 | while (next_handler_obj) { | |
682 | /* Found a handler, is it for the same address space? */ | |
683 | ||
684 | if (next_handler_obj->address_space.space_id == handler_obj->address_space.space_id) { | |
685 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
686 | "Found handler for region [%s] in device %p(%p) handler %p\n", | |
687 | acpi_ut_get_region_name (handler_obj->address_space.space_id), | |
688 | obj_desc, next_handler_obj, handler_obj)); | |
689 | ||
690 | /* | |
691 | * Since the object we found it on was a device, then it | |
692 | * means that someone has already installed a handler for | |
693 | * the branch of the namespace from this device on. Just | |
694 | * bail out telling the walk routine to not traverse this | |
695 | * branch. This preserves the scoping rule for handlers. | |
696 | */ | |
697 | return (AE_CTRL_DEPTH); | |
698 | } | |
699 | ||
700 | /* Walk the linked list of handlers attached to this device */ | |
701 | ||
702 | next_handler_obj = next_handler_obj->address_space.next; | |
703 | } | |
704 | ||
705 | /* | |
706 | * As long as the device didn't have a handler for this | |
707 | * space we don't care about it. We just ignore it and | |
708 | * proceed. | |
709 | */ | |
710 | return (AE_OK); | |
711 | } | |
712 | ||
713 | /* Object is a Region */ | |
714 | ||
715 | if (obj_desc->region.space_id != handler_obj->address_space.space_id) { | |
716 | /* | |
717 | * This region is for a different address space | |
718 | * -- just ignore it | |
719 | */ | |
720 | return (AE_OK); | |
721 | } | |
722 | ||
723 | /* | |
724 | * Now we have a region and it is for the handler's address | |
725 | * space type. | |
726 | * | |
727 | * First disconnect region for any previous handler (if any) | |
728 | */ | |
729 | acpi_ev_detach_region (obj_desc, FALSE); | |
730 | ||
731 | /* Connect the region to the new handler */ | |
732 | ||
733 | status = acpi_ev_attach_region (handler_obj, obj_desc, FALSE); | |
734 | return (status); | |
735 | } | |
736 | ||
737 | ||
738 | /******************************************************************************* | |
739 | * | |
740 | * FUNCTION: acpi_ev_install_space_handler | |
741 | * | |
742 | * PARAMETERS: Node - Namespace node for the device | |
743 | * space_id - The address space ID | |
744 | * Handler - Address of the handler | |
745 | * Setup - Address of the setup function | |
746 | * Context - Value passed to the handler on each access | |
747 | * | |
748 | * RETURN: Status | |
749 | * | |
750 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
751 | * Assumes namespace is locked | |
752 | * | |
753 | ******************************************************************************/ | |
754 | ||
755 | acpi_status | |
756 | acpi_ev_install_space_handler ( | |
757 | struct acpi_namespace_node *node, | |
758 | acpi_adr_space_type space_id, | |
759 | acpi_adr_space_handler handler, | |
760 | acpi_adr_space_setup setup, | |
761 | void *context) | |
762 | { | |
763 | union acpi_operand_object *obj_desc; | |
764 | union acpi_operand_object *handler_obj; | |
765 | acpi_status status; | |
766 | acpi_object_type type; | |
767 | u16 flags = 0; | |
768 | ||
769 | ||
770 | ACPI_FUNCTION_TRACE ("ev_install_space_handler"); | |
771 | ||
772 | ||
773 | /* | |
774 | * This registration is valid for only the types below | |
775 | * and the root. This is where the default handlers | |
776 | * get placed. | |
777 | */ | |
778 | if ((node->type != ACPI_TYPE_DEVICE) && | |
779 | (node->type != ACPI_TYPE_PROCESSOR) && | |
780 | (node->type != ACPI_TYPE_THERMAL) && | |
781 | (node != acpi_gbl_root_node)) { | |
782 | status = AE_BAD_PARAMETER; | |
783 | goto unlock_and_exit; | |
784 | } | |
785 | ||
786 | if (handler == ACPI_DEFAULT_HANDLER) { | |
787 | flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; | |
788 | ||
789 | switch (space_id) { | |
790 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
791 | handler = acpi_ex_system_memory_space_handler; | |
792 | setup = acpi_ev_system_memory_region_setup; | |
793 | break; | |
794 | ||
795 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
796 | handler = acpi_ex_system_io_space_handler; | |
797 | setup = acpi_ev_io_space_region_setup; | |
798 | break; | |
799 | ||
800 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
801 | handler = acpi_ex_pci_config_space_handler; | |
802 | setup = acpi_ev_pci_config_region_setup; | |
803 | break; | |
804 | ||
805 | case ACPI_ADR_SPACE_CMOS: | |
806 | handler = acpi_ex_cmos_space_handler; | |
807 | setup = acpi_ev_cmos_region_setup; | |
808 | break; | |
809 | ||
810 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
811 | handler = acpi_ex_pci_bar_space_handler; | |
812 | setup = acpi_ev_pci_bar_region_setup; | |
813 | break; | |
814 | ||
815 | case ACPI_ADR_SPACE_DATA_TABLE: | |
816 | handler = acpi_ex_data_table_space_handler; | |
817 | setup = NULL; | |
818 | break; | |
819 | ||
820 | default: | |
821 | status = AE_BAD_PARAMETER; | |
822 | goto unlock_and_exit; | |
823 | } | |
824 | } | |
825 | ||
826 | /* If the caller hasn't specified a setup routine, use the default */ | |
827 | ||
828 | if (!setup) { | |
829 | setup = acpi_ev_default_region_setup; | |
830 | } | |
831 | ||
832 | /* Check for an existing internal object */ | |
833 | ||
834 | obj_desc = acpi_ns_get_attached_object (node); | |
835 | if (obj_desc) { | |
836 | /* | |
837 | * The attached device object already exists. | |
838 | * Make sure the handler is not already installed. | |
839 | */ | |
840 | handler_obj = obj_desc->device.handler; | |
841 | ||
842 | /* Walk the handler list for this device */ | |
843 | ||
844 | while (handler_obj) { | |
845 | /* Same space_id indicates a handler already installed */ | |
846 | ||
847 | if (handler_obj->address_space.space_id == space_id) { | |
848 | if (handler_obj->address_space.handler == handler) { | |
849 | /* | |
850 | * It is (relatively) OK to attempt to install the SAME | |
851 | * handler twice. This can easily happen with PCI_Config space. | |
852 | */ | |
853 | status = AE_SAME_HANDLER; | |
854 | goto unlock_and_exit; | |
855 | } | |
856 | else { | |
857 | /* A handler is already installed */ | |
858 | ||
859 | status = AE_ALREADY_EXISTS; | |
860 | } | |
861 | goto unlock_and_exit; | |
862 | } | |
863 | ||
864 | /* Walk the linked list of handlers */ | |
865 | ||
866 | handler_obj = handler_obj->address_space.next; | |
867 | } | |
868 | } | |
869 | else { | |
870 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
871 | "Creating object on Device %p while installing handler\n", node)); | |
872 | ||
873 | /* obj_desc does not exist, create one */ | |
874 | ||
875 | if (node->type == ACPI_TYPE_ANY) { | |
876 | type = ACPI_TYPE_DEVICE; | |
877 | } | |
878 | else { | |
879 | type = node->type; | |
880 | } | |
881 | ||
882 | obj_desc = acpi_ut_create_internal_object (type); | |
883 | if (!obj_desc) { | |
884 | status = AE_NO_MEMORY; | |
885 | goto unlock_and_exit; | |
886 | } | |
887 | ||
888 | /* Init new descriptor */ | |
889 | ||
890 | obj_desc->common.type = (u8) type; | |
891 | ||
892 | /* Attach the new object to the Node */ | |
893 | ||
894 | status = acpi_ns_attach_object (node, obj_desc, type); | |
895 | ||
896 | /* Remove local reference to the object */ | |
897 | ||
898 | acpi_ut_remove_reference (obj_desc); | |
899 | ||
900 | if (ACPI_FAILURE (status)) { | |
901 | goto unlock_and_exit; | |
902 | } | |
903 | } | |
904 | ||
905 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, | |
906 | "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", | |
907 | acpi_ut_get_region_name (space_id), space_id, | |
908 | acpi_ut_get_node_name (node), node, obj_desc)); | |
909 | ||
910 | /* | |
911 | * Install the handler | |
912 | * | |
913 | * At this point there is no existing handler. | |
914 | * Just allocate the object for the handler and link it | |
915 | * into the list. | |
916 | */ | |
917 | handler_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_ADDRESS_HANDLER); | |
918 | if (!handler_obj) { | |
919 | status = AE_NO_MEMORY; | |
920 | goto unlock_and_exit; | |
921 | } | |
922 | ||
923 | /* Init handler obj */ | |
924 | ||
925 | handler_obj->address_space.space_id = (u8) space_id; | |
926 | handler_obj->address_space.hflags = flags; | |
927 | handler_obj->address_space.region_list = NULL; | |
928 | handler_obj->address_space.node = node; | |
929 | handler_obj->address_space.handler = handler; | |
930 | handler_obj->address_space.context = context; | |
931 | handler_obj->address_space.setup = setup; | |
932 | ||
933 | /* Install at head of Device.address_space list */ | |
934 | ||
935 | handler_obj->address_space.next = obj_desc->device.handler; | |
936 | ||
937 | /* | |
938 | * The Device object is the first reference on the handler_obj. | |
939 | * Each region that uses the handler adds a reference. | |
940 | */ | |
941 | obj_desc->device.handler = handler_obj; | |
942 | ||
943 | /* | |
944 | * Walk the namespace finding all of the regions this | |
945 | * handler will manage. | |
946 | * | |
947 | * Start at the device and search the branch toward | |
948 | * the leaf nodes until either the leaf is encountered or | |
949 | * a device is detected that has an address handler of the | |
950 | * same type. | |
951 | * | |
952 | * In either case, back up and search down the remainder | |
953 | * of the branch | |
954 | */ | |
955 | status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, | |
956 | ACPI_NS_WALK_UNLOCK, acpi_ev_install_handler, | |
957 | handler_obj, NULL); | |
958 | ||
959 | unlock_and_exit: | |
960 | return_ACPI_STATUS (status); | |
961 | } | |
962 | ||
963 | ||
964 | /******************************************************************************* | |
965 | * | |
966 | * FUNCTION: acpi_ev_execute_reg_methods | |
967 | * | |
968 | * PARAMETERS: Node - Namespace node for the device | |
969 | * space_id - The address space ID | |
970 | * | |
971 | * RETURN: Status | |
972 | * | |
973 | * DESCRIPTION: Run all _REG methods for the input Space ID; | |
974 | * Note: assumes namespace is locked, or system init time. | |
975 | * | |
976 | ******************************************************************************/ | |
977 | ||
978 | acpi_status | |
979 | acpi_ev_execute_reg_methods ( | |
980 | struct acpi_namespace_node *node, | |
981 | acpi_adr_space_type space_id) | |
982 | { | |
983 | acpi_status status; | |
984 | ||
985 | ||
986 | ACPI_FUNCTION_TRACE ("ev_execute_reg_methods"); | |
987 | ||
988 | ||
989 | /* | |
990 | * Run all _REG methods for all Operation Regions for this | |
991 | * space ID. This is a separate walk in order to handle any | |
992 | * interdependencies between regions and _REG methods. (i.e. handlers | |
993 | * must be installed for all regions of this Space ID before we | |
994 | * can run any _REG methods) | |
995 | */ | |
996 | status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, | |
997 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, | |
998 | &space_id, NULL); | |
999 | ||
1000 | return_ACPI_STATUS (status); | |
1001 | } | |
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 | acpi_status | |
1015 | acpi_ev_reg_run ( | |
1016 | acpi_handle obj_handle, | |
1017 | u32 level, | |
1018 | void *context, | |
1019 | void **return_value) | |
1020 | { | |
1021 | union acpi_operand_object *obj_desc; | |
1022 | struct acpi_namespace_node *node; | |
1023 | acpi_adr_space_type space_id; | |
1024 | acpi_status status; | |
1025 | ||
1026 | ||
1027 | space_id = *ACPI_CAST_PTR (acpi_adr_space_type, context); | |
1028 | ||
1029 | /* Convert and validate the device handle */ | |
1030 | ||
1031 | node = acpi_ns_map_handle_to_node (obj_handle); | |
1032 | if (!node) { | |
1033 | return (AE_BAD_PARAMETER); | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * We only care about regions.and objects | |
1038 | * that are allowed to have address space handlers | |
1039 | */ | |
1040 | if ((node->type != ACPI_TYPE_REGION) && | |
1041 | (node != acpi_gbl_root_node)) { | |
1042 | return (AE_OK); | |
1043 | } | |
1044 | ||
1045 | /* Check for an existing internal object */ | |
1046 | ||
1047 | obj_desc = acpi_ns_get_attached_object (node); | |
1048 | if (!obj_desc) { | |
1049 | /* No object, just exit */ | |
1050 | ||
1051 | return (AE_OK); | |
1052 | } | |
1053 | ||
1054 | /* Object is a Region */ | |
1055 | ||
1056 | if (obj_desc->region.space_id != space_id) { | |
1057 | /* | |
1058 | * This region is for a different address space | |
1059 | * -- just ignore it | |
1060 | */ | |
1061 | return (AE_OK); | |
1062 | } | |
1063 | ||
1064 | status = acpi_ev_execute_reg_method (obj_desc, 1); | |
1065 | return (status); | |
1066 | } | |
1067 |