Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / gpu / drm / nouveau / nvkm / core / event.c
blob4e8d3fa042df8e383fd5aee7e99ae3b33242927b
1 /*
2 * Copyright 2013-2014 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
22 #include <core/event.h>
23 #include <core/notify.h>
25 void
26 nvkm_event_put(struct nvkm_event *event, u32 types, int index)
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);
38 void
39 nvkm_event_get(struct nvkm_event *event, u32 types, int index)
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);
51 void
52 nvkm_event_send(struct nvkm_event *event, u32 types, int index,
53 void *data, u32 size)
55 struct nvkm_notify *notify;
56 unsigned long flags;
58 if (!event->refs || WARN_ON(index >= event->index_nr))
59 return;
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;
68 nvkm_notify_send(notify, data, size);
71 spin_unlock_irqrestore(&event->list_lock, flags);
74 void
75 nvkm_event_fini(struct nvkm_event *event)
77 if (event->refs) {
78 kfree(event->refs);
79 event->refs = NULL;
83 int
84 nvkm_event_init(const struct nvkm_event_func *func, int types_nr, int index_nr,
85 struct nvkm_event *event)
87 event->refs = kzalloc(sizeof(*event->refs) * index_nr * types_nr,
88 GFP_KERNEL);
89 if (!event->refs)
90 return -ENOMEM;
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;