1/*
2 * Copyright 2013-2014 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22#include <core/event.h>
23#include <core/notify.h>
24
25void
26nvkm_event_put(struct nvkm_event *event, u32 types, int index)
27{
28	assert_spin_locked(&event->refs_lock);
29	while (types) {
30		int type = __ffs(types); types &= ~(1 << type);
31		if (--event->refs[index * event->types_nr + type] == 0) {
32			if (event->func->fini)
33				event->func->fini(event, 1 << type, index);
34		}
35	}
36}
37
38void
39nvkm_event_get(struct nvkm_event *event, u32 types, int index)
40{
41	assert_spin_locked(&event->refs_lock);
42	while (types) {
43		int type = __ffs(types); types &= ~(1 << type);
44		if (++event->refs[index * event->types_nr + type] == 1) {
45			if (event->func->init)
46				event->func->init(event, 1 << type, index);
47		}
48	}
49}
50
51void
52nvkm_event_send(struct nvkm_event *event, u32 types, int index,
53		void *data, u32 size)
54{
55	struct nvkm_notify *notify;
56	unsigned long flags;
57
58	if (!event->refs || WARN_ON(index >= event->index_nr))
59		return;
60
61	spin_lock_irqsave(&event->list_lock, flags);
62	list_for_each_entry(notify, &event->list, head) {
63		if (notify->index == index && (notify->types & types)) {
64			if (event->func->send) {
65				event->func->send(data, size, notify);
66				continue;
67			}
68			nvkm_notify_send(notify, data, size);
69		}
70	}
71	spin_unlock_irqrestore(&event->list_lock, flags);
72}
73
74void
75nvkm_event_fini(struct nvkm_event *event)
76{
77	if (event->refs) {
78		kfree(event->refs);
79		event->refs = NULL;
80	}
81}
82
83int
84nvkm_event_init(const struct nvkm_event_func *func, int types_nr, int index_nr,
85		struct nvkm_event *event)
86{
87	event->refs = kzalloc(sizeof(*event->refs) * index_nr * types_nr,
88			      GFP_KERNEL);
89	if (!event->refs)
90		return -ENOMEM;
91
92	event->func = func;
93	event->types_nr = types_nr;
94	event->index_nr = index_nr;
95	spin_lock_init(&event->refs_lock);
96	spin_lock_init(&event->list_lock);
97	INIT_LIST_HEAD(&event->list);
98	return 0;
99}
100