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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evmisc - Miscellaneous event manager support functions | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
fbb7a2dc | 8 | * Copyright (C) 2000 - 2014, 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 | * | |
ba494bee | 59 | * PARAMETERS: node - Node to check |
1da177e4 LT |
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: | |
1d1ea1b7 | 81 | |
1da177e4 LT |
82 | return (FALSE); |
83 | } | |
84 | } | |
85 | ||
1da177e4 LT |
86 | /******************************************************************************* |
87 | * | |
88 | * FUNCTION: acpi_ev_queue_notify_request | |
89 | * | |
ba494bee | 90 | * PARAMETERS: node - NS node for the notified object |
1da177e4 LT |
91 | * notify_value - Value from the Notify() request |
92 | * | |
93 | * RETURN: Status | |
94 | * | |
95 | * DESCRIPTION: Dispatch a device notification event to a previously | |
96 | * installed handler. | |
97 | * | |
98 | ******************************************************************************/ | |
99 | ||
1da177e4 | 100 | acpi_status |
4be44fcd LB |
101 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, |
102 | u32 notify_value) | |
1da177e4 | 103 | { |
4be44fcd | 104 | union acpi_operand_object *obj_desc; |
86ed4bc8 BM |
105 | union acpi_operand_object *handler_list_head = NULL; |
106 | union acpi_generic_state *info; | |
107 | u8 handler_list_id = 0; | |
4be44fcd | 108 | acpi_status status = AE_OK; |
1da177e4 | 109 | |
b229cf92 | 110 | ACPI_FUNCTION_NAME(ev_queue_notify_request); |
1da177e4 | 111 | |
86ed4bc8 | 112 | /* Are Notifies allowed on this object? */ |
52fc0b02 | 113 | |
86ed4bc8 BM |
114 | if (!acpi_ev_is_notify_object(node)) { |
115 | return (AE_TYPE); | |
116 | } | |
514d18d7 | 117 | |
86ed4bc8 | 118 | /* Get the correct notify list type (System or Device) */ |
514d18d7 | 119 | |
86ed4bc8 BM |
120 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { |
121 | handler_list_id = ACPI_SYSTEM_HANDLER_LIST; | |
122 | } else { | |
123 | handler_list_id = ACPI_DEVICE_HANDLER_LIST; | |
124 | } | |
1da177e4 | 125 | |
86ed4bc8 | 126 | /* Get the notify object attached to the namespace Node */ |
1da177e4 | 127 | |
86ed4bc8 BM |
128 | obj_desc = acpi_ns_get_attached_object(node); |
129 | if (obj_desc) { | |
9f15fc66 | 130 | |
86ed4bc8 | 131 | /* We have an attached object, Get the correct handler list */ |
9f15fc66 | 132 | |
86ed4bc8 BM |
133 | handler_list_head = |
134 | obj_desc->common_notify.notify_list[handler_list_id]; | |
1da177e4 LT |
135 | } |
136 | ||
514d18d7 | 137 | /* |
86ed4bc8 BM |
138 | * If there is no notify handler (Global or Local) |
139 | * for this object, just ignore the notify | |
514d18d7 | 140 | */ |
86ed4bc8 BM |
141 | if (!acpi_gbl_global_notify[handler_list_id].handler |
142 | && !handler_list_head) { | |
4be44fcd | 143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
86ed4bc8 | 144 | "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", |
4be44fcd LB |
145 | acpi_ut_get_node_name(node), notify_value, |
146 | node)); | |
86ed4bc8 BM |
147 | |
148 | return (AE_OK); | |
149 | } | |
150 | ||
151 | /* Setup notify info and schedule the notify dispatcher */ | |
152 | ||
153 | info = acpi_ut_create_generic_state(); | |
154 | if (!info) { | |
155 | return (AE_NO_MEMORY); | |
156 | } | |
157 | ||
158 | info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY; | |
159 | ||
160 | info->notify.node = node; | |
161 | info->notify.value = (u16)notify_value; | |
162 | info->notify.handler_list_id = handler_list_id; | |
163 | info->notify.handler_list_head = handler_list_head; | |
164 | info->notify.global = &acpi_gbl_global_notify[handler_list_id]; | |
165 | ||
166 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
167 | "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", | |
168 | acpi_ut_get_node_name(node), | |
169 | acpi_ut_get_type_name(node->type), notify_value, | |
170 | acpi_ut_get_notify_name(notify_value), node)); | |
171 | ||
172 | status = acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, | |
173 | info); | |
174 | if (ACPI_FAILURE(status)) { | |
175 | acpi_ut_delete_generic_state(info); | |
1da177e4 LT |
176 | } |
177 | ||
178 | return (status); | |
179 | } | |
180 | ||
1da177e4 LT |
181 | /******************************************************************************* |
182 | * | |
183 | * FUNCTION: acpi_ev_notify_dispatch | |
184 | * | |
ba494bee | 185 | * PARAMETERS: context - To be passed to the notify handler |
1da177e4 LT |
186 | * |
187 | * RETURN: None. | |
188 | * | |
189 | * DESCRIPTION: Dispatch a device notification event to a previously | |
190 | * installed handler. | |
191 | * | |
192 | ******************************************************************************/ | |
193 | ||
4be44fcd | 194 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
1da177e4 | 195 | { |
86ed4bc8 | 196 | union acpi_generic_state *info = (union acpi_generic_state *)context; |
4be44fcd | 197 | union acpi_operand_object *handler_obj; |
1da177e4 | 198 | |
4be44fcd | 199 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 200 | |
86ed4bc8 | 201 | /* Invoke a global notify handler if installed */ |
1da177e4 | 202 | |
86ed4bc8 BM |
203 | if (info->notify.global->handler) { |
204 | info->notify.global->handler(info->notify.node, | |
205 | info->notify.value, | |
206 | info->notify.global->context); | |
1da177e4 LT |
207 | } |
208 | ||
86ed4bc8 | 209 | /* Now invoke the local notify handler(s) if any are installed */ |
1da177e4 | 210 | |
86ed4bc8 BM |
211 | handler_obj = info->notify.handler_list_head; |
212 | while (handler_obj) { | |
213 | handler_obj->notify.handler(info->notify.node, | |
214 | info->notify.value, | |
215 | handler_obj->notify.context); | |
3f0be671 | 216 | |
86ed4bc8 BM |
217 | handler_obj = |
218 | handler_obj->notify.next[info->notify.handler_list_id]; | |
1da177e4 LT |
219 | } |
220 | ||
221 | /* All done with the info object */ | |
222 | ||
86ed4bc8 | 223 | acpi_ut_delete_generic_state(info); |
1da177e4 LT |
224 | } |
225 | ||
33620c54 | 226 | #if (!ACPI_REDUCED_HARDWARE) |
1da177e4 LT |
227 | /****************************************************************************** |
228 | * | |
229 | * FUNCTION: acpi_ev_terminate | |
230 | * | |
231 | * PARAMETERS: none | |
232 | * | |
233 | * RETURN: none | |
234 | * | |
235 | * DESCRIPTION: Disable events and free memory allocated for table storage. | |
236 | * | |
237 | ******************************************************************************/ | |
238 | ||
4be44fcd | 239 | void acpi_ev_terminate(void) |
1da177e4 | 240 | { |
67a119f9 | 241 | u32 i; |
4be44fcd | 242 | acpi_status status; |
1da177e4 | 243 | |
b229cf92 | 244 | ACPI_FUNCTION_TRACE(ev_terminate); |
1da177e4 LT |
245 | |
246 | if (acpi_gbl_events_initialized) { | |
247 | /* | |
9f15fc66 BM |
248 | * Disable all event-related functionality. In all cases, on error, |
249 | * print a message but obviously we don't abort. | |
1da177e4 LT |
250 | */ |
251 | ||
252 | /* Disable all fixed events */ | |
253 | ||
254 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
67a119f9 | 255 | status = acpi_disable_event(i, 0); |
4be44fcd | 256 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 257 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 258 | "Could not disable fixed event %u", |
b8e4d893 | 259 | (u32) i)); |
1da177e4 LT |
260 | } |
261 | } | |
262 | ||
263 | /* Disable all GPEs in all GPE blocks */ | |
264 | ||
e97d6bf1 | 265 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); |
1da177e4 | 266 | |
8876016b BM |
267 | status = acpi_ev_remove_global_lock_handler(); |
268 | if (ACPI_FAILURE(status)) { | |
269 | ACPI_ERROR((AE_INFO, | |
270 | "Could not remove Global Lock handler")); | |
271 | } | |
64f3af5f TN |
272 | |
273 | acpi_gbl_events_initialized = FALSE; | |
1da177e4 LT |
274 | } |
275 | ||
a2fd4b4b LZ |
276 | /* Remove SCI handlers */ |
277 | ||
278 | status = acpi_ev_remove_all_sci_handlers(); | |
279 | if (ACPI_FAILURE(status)) { | |
280 | ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); | |
281 | } | |
282 | ||
1da177e4 LT |
283 | /* Deallocate all handler objects installed within GPE info structs */ |
284 | ||
e97d6bf1 | 285 | status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); |
1da177e4 LT |
286 | |
287 | /* Return to original mode if necessary */ | |
288 | ||
289 | if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { | |
4be44fcd LB |
290 | status = acpi_disable(); |
291 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 292 | ACPI_WARNING((AE_INFO, "AcpiDisable failed")); |
1da177e4 LT |
293 | } |
294 | } | |
295 | return_VOID; | |
296 | } | |
33620c54 BM |
297 | |
298 | #endif /* !ACPI_REDUCED_HARDWARE */ |