summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/evmisc.c
blob: a5687540e9a66e5ba20bfeb9772ad5351b20bc61 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
/******************************************************************************
 *
 * Module Name: evmisc - Miscellaneous event manager support functions
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2013, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_EVENTS
ACPI_MODULE_NAME("evmisc")

/* Local prototypes */
static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_is_notify_object
 *
 * PARAMETERS:  node            - Node to check
 *
 * RETURN:      TRUE if notifies allowed on this object
 *
 * DESCRIPTION: Check type of node for a object that supports notifies.
 *
 *              TBD: This could be replaced by a flag bit in the node.
 *
 ******************************************************************************/

u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node)
{
	switch (node->type) {
	case ACPI_TYPE_DEVICE:
	case ACPI_TYPE_PROCESSOR:
	case ACPI_TYPE_THERMAL:
		/*
		 * These are the ONLY objects that can receive ACPI notifications
		 */
		return (TRUE);

	default:

		return (FALSE);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_queue_notify_request
 *
 * PARAMETERS:  node            - NS node for the notified object
 *              notify_value    - Value from the Notify() request
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Dispatch a device notification event to a previously
 *              installed handler.
 *
 ******************************************************************************/

acpi_status
acpi_ev_queue_notify_request(struct acpi_namespace_node * node,
			     u32 notify_value)
{
	union acpi_operand_object *obj_desc;
	union acpi_operand_object *handler_list_head = NULL;
	union acpi_generic_state *info;
	u8 handler_list_id = 0;
	acpi_status status = AE_OK;

	ACPI_FUNCTION_NAME(ev_queue_notify_request);

	/* Are Notifies allowed on this object? */

	if (!acpi_ev_is_notify_object(node)) {
		return (AE_TYPE);
	}

	/* Get the correct notify list type (System or Device) */

	if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
		handler_list_id = ACPI_SYSTEM_HANDLER_LIST;
	} else {
		handler_list_id = ACPI_DEVICE_HANDLER_LIST;
	}

	/* Get the notify object attached to the namespace Node */

	obj_desc = acpi_ns_get_attached_object(node);
	if (obj_desc) {

		/* We have an attached object, Get the correct handler list */

		handler_list_head =
		    obj_desc->common_notify.notify_list[handler_list_id];
	}

	/*
	 * If there is no notify handler (Global or Local)
	 * for this object, just ignore the notify
	 */
	if (!acpi_gbl_global_notify[handler_list_id].handler
	    && !handler_list_head) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n",
				  acpi_ut_get_node_name(node), notify_value,
				  node));

		return (AE_OK);
	}

	/* Setup notify info and schedule the notify dispatcher */

	info = acpi_ut_create_generic_state();
	if (!info) {
		return (AE_NO_MEMORY);
	}

	info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY;

	info->notify.node = node;
	info->notify.value = (u16)notify_value;
	info->notify.handler_list_id = handler_list_id;
	info->notify.handler_list_head = handler_list_head;
	info->notify.global = &acpi_gbl_global_notify[handler_list_id];

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n",
			  acpi_ut_get_node_name(node),
			  acpi_ut_get_type_name(node->type), notify_value,
			  acpi_ut_get_notify_name(notify_value), node));

	status = acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch,
				 info);
	if (ACPI_FAILURE(status)) {
		acpi_ut_delete_generic_state(info);
	}

	return (status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_notify_dispatch
 *
 * PARAMETERS:  context         - To be passed to the notify handler
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Dispatch a device notification event to a previously
 *              installed handler.
 *
 ******************************************************************************/

static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context)
{
	union acpi_generic_state *info = (union acpi_generic_state *)context;
	union acpi_operand_object *handler_obj;

	ACPI_FUNCTION_ENTRY();

	/* Invoke a global notify handler if installed */

	if (info->notify.global->handler) {
		info->notify.global->handler(info->notify.node,
					     info->notify.value,
					     info->notify.global->context);
	}

	/* Now invoke the local notify handler(s) if any are installed */

	handler_obj = info->notify.handler_list_head;
	while (handler_obj) {
		handler_obj->notify.handler(info->notify.node,
					    info->notify.value,
					    handler_obj->notify.context);

		handler_obj =
		    handler_obj->notify.next[info->notify.handler_list_id];
	}

	/* All done with the info object */

	acpi_ut_delete_generic_state(info);
}

#if (!ACPI_REDUCED_HARDWARE)
/******************************************************************************
 *
 * FUNCTION:    acpi_ev_terminate
 *
 * PARAMETERS:  none
 *
 * RETURN:      none
 *
 * DESCRIPTION: Disable events and free memory allocated for table storage.
 *
 ******************************************************************************/

void acpi_ev_terminate(void)
{
	u32 i;
	acpi_status status;

	ACPI_FUNCTION_TRACE(ev_terminate);

	if (acpi_gbl_events_initialized) {
		/*
		 * Disable all event-related functionality. In all cases, on error,
		 * print a message but obviously we don't abort.
		 */

		/* Disable all fixed events */

		for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
			status = acpi_disable_event(i, 0);
			if (ACPI_FAILURE(status)) {
				ACPI_ERROR((AE_INFO,
					    "Could not disable fixed event %u",
					    (u32) i));
			}
		}

		/* Disable all GPEs in all GPE blocks */

		status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);

		status = acpi_ev_remove_global_lock_handler();
		if (ACPI_FAILURE(status)) {
			ACPI_ERROR((AE_INFO,
				    "Could not remove Global Lock handler"));
		}

		acpi_gbl_events_initialized = FALSE;
	}

	/* Remove SCI handlers */

	status = acpi_ev_remove_all_sci_handlers();
	if (ACPI_FAILURE(status)) {
		ACPI_ERROR((AE_INFO, "Could not remove SCI handler"));
	}

	/* Deallocate all handler objects installed within GPE info structs */

	status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL);

	/* Return to original mode if necessary */

	if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {
		status = acpi_disable();
		if (ACPI_FAILURE(status)) {
			ACPI_WARNING((AE_INFO, "AcpiDisable failed"));
		}
	}
	return_VOID;
}

#endif				/* !ACPI_REDUCED_HARDWARE */