2 * Copyright 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 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 #include <core/client.h>
26 #include <core/event.h>
27 #include <core/notify.h>
29 #include <nvif/unpack.h>
30 #include <nvif/event.h>
33 nvkm_notify_put_locked(struct nvkm_notify *notify)
35 if (notify->block++ == 0)
36 nvkm_event_put(notify->event, notify->types, notify->index);
40 nvkm_notify_put(struct nvkm_notify *notify)
42 struct nvkm_event *event = notify->event;
45 test_and_clear_bit(NVKM_NOTIFY_USER, ¬ify->flags)) {
46 spin_lock_irqsave(&event->refs_lock, flags);
47 nvkm_notify_put_locked(notify);
48 spin_unlock_irqrestore(&event->refs_lock, flags);
49 if (test_bit(NVKM_NOTIFY_WORK, ¬ify->flags))
50 flush_work(¬ify->work);
55 nvkm_notify_get_locked(struct nvkm_notify *notify)
57 if (--notify->block == 0)
58 nvkm_event_get(notify->event, notify->types, notify->index);
62 nvkm_notify_get(struct nvkm_notify *notify)
64 struct nvkm_event *event = notify->event;
67 !test_and_set_bit(NVKM_NOTIFY_USER, ¬ify->flags)) {
68 spin_lock_irqsave(&event->refs_lock, flags);
69 nvkm_notify_get_locked(notify);
70 spin_unlock_irqrestore(&event->refs_lock, flags);
75 nvkm_notify_func(struct nvkm_notify *notify)
77 struct nvkm_event *event = notify->event;
78 int ret = notify->func(notify);
80 if ((ret == NVKM_NOTIFY_KEEP) ||
81 !test_and_clear_bit(NVKM_NOTIFY_USER, ¬ify->flags)) {
82 spin_lock_irqsave(&event->refs_lock, flags);
83 nvkm_notify_get_locked(notify);
84 spin_unlock_irqrestore(&event->refs_lock, flags);
89 nvkm_notify_work(struct work_struct *work)
91 struct nvkm_notify *notify = container_of(work, typeof(*notify), work);
92 nvkm_notify_func(notify);
96 nvkm_notify_send(struct nvkm_notify *notify, void *data, u32 size)
98 struct nvkm_event *event = notify->event;
101 assert_spin_locked(&event->list_lock);
102 BUG_ON(size != notify->size);
104 spin_lock_irqsave(&event->refs_lock, flags);
106 spin_unlock_irqrestore(&event->refs_lock, flags);
109 nvkm_notify_put_locked(notify);
110 spin_unlock_irqrestore(&event->refs_lock, flags);
112 if (test_bit(NVKM_NOTIFY_WORK, ¬ify->flags)) {
113 memcpy((void *)notify->data, data, size);
114 schedule_work(¬ify->work);
117 nvkm_notify_func(notify);
123 nvkm_notify_fini(struct nvkm_notify *notify)
127 nvkm_notify_put(notify);
128 spin_lock_irqsave(¬ify->event->list_lock, flags);
129 list_del(¬ify->head);
130 spin_unlock_irqrestore(¬ify->event->list_lock, flags);
131 kfree((void *)notify->data);
132 notify->event = NULL;
137 nvkm_notify_init(struct nouveau_object *object, struct nvkm_event *event,
138 int (*func)(struct nvkm_notify *), bool work,
139 void *data, u32 size, u32 reply,
140 struct nvkm_notify *notify)
144 if ((notify->event = event), event->refs) {
145 ret = event->func->ctor(object, data, size, notify);
146 if (ret == 0 && (ret = -EINVAL, notify->size == reply)) {
152 INIT_WORK(¬ify->work, nvkm_notify_work);
153 set_bit(NVKM_NOTIFY_WORK, ¬ify->flags);
154 notify->data = kmalloc(reply, GFP_KERNEL);
160 spin_lock_irqsave(&event->list_lock, flags);
161 list_add_tail(¬ify->head, &event->list);
162 spin_unlock_irqrestore(&event->list_lock, flags);
166 notify->event = NULL;