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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evmisc - Miscellaneous event manager support functions | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, Intel Corp. |
1da177e4 LT |
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> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evmisc") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
4be44fcd | 53 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); |
44f6c012 | 54 | |
1da177e4 LT |
55 | /******************************************************************************* |
56 | * | |
57 | * FUNCTION: acpi_ev_is_notify_object | |
58 | * | |
59 | * PARAMETERS: Node - Node to check | |
60 | * | |
61 | * RETURN: TRUE if notifies allowed on this object | |
62 | * | |
63 | * DESCRIPTION: Check type of node for a object that supports notifies. | |
64 | * | |
65 | * TBD: This could be replaced by a flag bit in the node. | |
66 | * | |
67 | ******************************************************************************/ | |
68 | ||
4be44fcd | 69 | u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) |
1da177e4 LT |
70 | { |
71 | switch (node->type) { | |
72 | case ACPI_TYPE_DEVICE: | |
73 | case ACPI_TYPE_PROCESSOR: | |
1da177e4 LT |
74 | case ACPI_TYPE_THERMAL: |
75 | /* | |
76 | * These are the ONLY objects that can receive ACPI notifications | |
77 | */ | |
78 | return (TRUE); | |
79 | ||
80 | default: | |
81 | return (FALSE); | |
82 | } | |
83 | } | |
84 | ||
1da177e4 LT |
85 | /******************************************************************************* |
86 | * | |
87 | * FUNCTION: acpi_ev_queue_notify_request | |
88 | * | |
89 | * PARAMETERS: Node - NS node for the notified object | |
90 | * notify_value - Value from the Notify() request | |
91 | * | |
92 | * RETURN: Status | |
93 | * | |
94 | * DESCRIPTION: Dispatch a device notification event to a previously | |
95 | * installed handler. | |
96 | * | |
97 | ******************************************************************************/ | |
98 | ||
1da177e4 | 99 | acpi_status |
4be44fcd LB |
100 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, |
101 | u32 notify_value) | |
1da177e4 | 102 | { |
4be44fcd LB |
103 | union acpi_operand_object *obj_desc; |
104 | union acpi_operand_object *handler_obj = NULL; | |
105 | union acpi_generic_state *notify_info; | |
106 | acpi_status status = AE_OK; | |
1da177e4 | 107 | |
b229cf92 | 108 | ACPI_FUNCTION_NAME(ev_queue_notify_request); |
1da177e4 LT |
109 | |
110 | /* | |
111 | * For value 3 (Ejection Request), some device method may need to be run. | |
44f6c012 RM |
112 | * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need |
113 | * to be run. | |
1da177e4 | 114 | * For value 0x80 (Status Change) on the power button or sleep button, |
44f6c012 | 115 | * initiate soft-off or sleep operation? |
1da177e4 | 116 | */ |
4be44fcd | 117 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
514d18d7 ZR |
118 | "Dispatching Notify on [%4.4s] Node %p Value 0x%2.2X (%s)\n", |
119 | acpi_ut_get_node_name(node), node, notify_value, | |
120 | acpi_ut_get_notify_name(notify_value))); | |
1da177e4 LT |
121 | |
122 | /* Get the notify object attached to the NS Node */ | |
123 | ||
4be44fcd | 124 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 125 | if (obj_desc) { |
52fc0b02 | 126 | |
1da177e4 LT |
127 | /* We have the notify object, Get the right handler */ |
128 | ||
129 | switch (node->type) { | |
514d18d7 ZR |
130 | |
131 | /* Notify allowed only on these types */ | |
132 | ||
1da177e4 LT |
133 | case ACPI_TYPE_DEVICE: |
134 | case ACPI_TYPE_THERMAL: | |
135 | case ACPI_TYPE_PROCESSOR: | |
1da177e4 LT |
136 | |
137 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { | |
4be44fcd LB |
138 | handler_obj = |
139 | obj_desc->common_notify.system_notify; | |
140 | } else { | |
141 | handler_obj = | |
142 | obj_desc->common_notify.device_notify; | |
1da177e4 LT |
143 | } |
144 | break; | |
145 | ||
146 | default: | |
9f15fc66 | 147 | |
1da177e4 | 148 | /* All other types are not supported */ |
9f15fc66 | 149 | |
1da177e4 LT |
150 | return (AE_TYPE); |
151 | } | |
152 | } | |
153 | ||
514d18d7 ZR |
154 | /* |
155 | * If there is any handler to run, schedule the dispatcher. | |
156 | * Check for: | |
157 | * 1) Global system notify handler | |
158 | * 2) Global device notify handler | |
159 | * 3) Per-device notify handler | |
160 | */ | |
d4913dc6 BM |
161 | if ((acpi_gbl_system_notify.handler && |
162 | (notify_value <= ACPI_MAX_SYS_NOTIFY)) || | |
163 | (acpi_gbl_device_notify.handler && | |
164 | (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { | |
4be44fcd | 165 | notify_info = acpi_ut_create_generic_state(); |
1da177e4 LT |
166 | if (!notify_info) { |
167 | return (AE_NO_MEMORY); | |
168 | } | |
169 | ||
514d18d7 ZR |
170 | if (!handler_obj) { |
171 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
d4913dc6 BM |
172 | "Executing system notify handler for Notify (%4.4s, %X) " |
173 | "node %p\n", | |
514d18d7 ZR |
174 | acpi_ut_get_node_name(node), |
175 | notify_value, node)); | |
176 | } | |
177 | ||
61686124 BM |
178 | notify_info->common.descriptor_type = |
179 | ACPI_DESC_TYPE_STATE_NOTIFY; | |
4be44fcd LB |
180 | notify_info->notify.node = node; |
181 | notify_info->notify.value = (u16) notify_value; | |
1da177e4 LT |
182 | notify_info->notify.handler_obj = handler_obj; |
183 | ||
40d07080 LB |
184 | status = |
185 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, | |
186 | notify_info); | |
187 | if (ACPI_FAILURE(status)) { | |
188 | acpi_ut_delete_generic_state(notify_info); | |
189 | } | |
514d18d7 | 190 | } else { |
9f15fc66 BM |
191 | /* There is no notify handler (per-device or system) for this device */ |
192 | ||
4be44fcd | 193 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
514d18d7 | 194 | "No notify handler for Notify (%4.4s, %X) node %p\n", |
4be44fcd LB |
195 | acpi_ut_get_node_name(node), notify_value, |
196 | node)); | |
1da177e4 LT |
197 | } |
198 | ||
199 | return (status); | |
200 | } | |
201 | ||
1da177e4 LT |
202 | /******************************************************************************* |
203 | * | |
204 | * FUNCTION: acpi_ev_notify_dispatch | |
205 | * | |
44f6c012 | 206 | * PARAMETERS: Context - To be passed to the notify handler |
1da177e4 LT |
207 | * |
208 | * RETURN: None. | |
209 | * | |
210 | * DESCRIPTION: Dispatch a device notification event to a previously | |
211 | * installed handler. | |
212 | * | |
213 | ******************************************************************************/ | |
214 | ||
4be44fcd | 215 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
1da177e4 | 216 | { |
4be44fcd LB |
217 | union acpi_generic_state *notify_info = |
218 | (union acpi_generic_state *)context; | |
219 | acpi_notify_handler global_handler = NULL; | |
220 | void *global_context = NULL; | |
221 | union acpi_operand_object *handler_obj; | |
1da177e4 | 222 | |
4be44fcd | 223 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
224 | |
225 | /* | |
9f15fc66 BM |
226 | * We will invoke a global notify handler if installed. This is done |
227 | * _before_ we invoke the per-device handler attached to the device. | |
1da177e4 LT |
228 | */ |
229 | if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { | |
52fc0b02 | 230 | |
1da177e4 LT |
231 | /* Global system notification handler */ |
232 | ||
233 | if (acpi_gbl_system_notify.handler) { | |
234 | global_handler = acpi_gbl_system_notify.handler; | |
235 | global_context = acpi_gbl_system_notify.context; | |
236 | } | |
4be44fcd | 237 | } else { |
1da177e4 LT |
238 | /* Global driver notification handler */ |
239 | ||
240 | if (acpi_gbl_device_notify.handler) { | |
241 | global_handler = acpi_gbl_device_notify.handler; | |
242 | global_context = acpi_gbl_device_notify.context; | |
243 | } | |
244 | } | |
245 | ||
246 | /* Invoke the system handler first, if present */ | |
247 | ||
248 | if (global_handler) { | |
4be44fcd LB |
249 | global_handler(notify_info->notify.node, |
250 | notify_info->notify.value, global_context); | |
1da177e4 LT |
251 | } |
252 | ||
253 | /* Now invoke the per-device handler, if present */ | |
254 | ||
255 | handler_obj = notify_info->notify.handler_obj; | |
256 | if (handler_obj) { | |
3f0be671 RW |
257 | struct acpi_object_notify_handler *notifier; |
258 | ||
259 | notifier = &handler_obj->notify; | |
260 | while (notifier) { | |
261 | notifier->handler(notify_info->notify.node, | |
262 | notify_info->notify.value, | |
263 | notifier->context); | |
264 | notifier = notifier->next; | |
265 | } | |
1da177e4 LT |
266 | } |
267 | ||
268 | /* All done with the info object */ | |
269 | ||
4be44fcd | 270 | acpi_ut_delete_generic_state(notify_info); |
1da177e4 LT |
271 | } |
272 | ||
1da177e4 LT |
273 | /****************************************************************************** |
274 | * | |
275 | * FUNCTION: acpi_ev_terminate | |
276 | * | |
277 | * PARAMETERS: none | |
278 | * | |
279 | * RETURN: none | |
280 | * | |
281 | * DESCRIPTION: Disable events and free memory allocated for table storage. | |
282 | * | |
283 | ******************************************************************************/ | |
284 | ||
4be44fcd | 285 | void acpi_ev_terminate(void) |
1da177e4 | 286 | { |
67a119f9 | 287 | u32 i; |
4be44fcd | 288 | acpi_status status; |
1da177e4 | 289 | |
b229cf92 | 290 | ACPI_FUNCTION_TRACE(ev_terminate); |
1da177e4 LT |
291 | |
292 | if (acpi_gbl_events_initialized) { | |
293 | /* | |
9f15fc66 BM |
294 | * Disable all event-related functionality. In all cases, on error, |
295 | * print a message but obviously we don't abort. | |
1da177e4 LT |
296 | */ |
297 | ||
298 | /* Disable all fixed events */ | |
299 | ||
300 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
67a119f9 | 301 | status = acpi_disable_event(i, 0); |
4be44fcd | 302 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 303 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 304 | "Could not disable fixed event %u", |
b8e4d893 | 305 | (u32) i)); |
1da177e4 LT |
306 | } |
307 | } | |
308 | ||
309 | /* Disable all GPEs in all GPE blocks */ | |
310 | ||
e97d6bf1 | 311 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); |
1da177e4 LT |
312 | |
313 | /* Remove SCI handler */ | |
314 | ||
4be44fcd | 315 | status = acpi_ev_remove_sci_handler(); |
1da177e4 | 316 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 317 | ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); |
1da177e4 | 318 | } |
8876016b BM |
319 | |
320 | status = acpi_ev_remove_global_lock_handler(); | |
321 | if (ACPI_FAILURE(status)) { | |
322 | ACPI_ERROR((AE_INFO, | |
323 | "Could not remove Global Lock handler")); | |
324 | } | |
1da177e4 LT |
325 | } |
326 | ||
327 | /* Deallocate all handler objects installed within GPE info structs */ | |
328 | ||
e97d6bf1 | 329 | status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); |
1da177e4 LT |
330 | |
331 | /* Return to original mode if necessary */ | |
332 | ||
333 | if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { | |
4be44fcd LB |
334 | status = acpi_disable(); |
335 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 336 | ACPI_WARNING((AE_INFO, "AcpiDisable failed")); |
1da177e4 LT |
337 | } |
338 | } | |
339 | return_VOID; | |
340 | } |