2 * Copyright (C) 2007 Ben Skeggs.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 #include <linux/ktime.h>
31 #include <linux/hrtimer.h>
33 #include "nouveau_drm.h"
34 #include "nouveau_dma.h"
35 #include "nouveau_fence.h"
38 nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
40 struct nouveau_fence *fence, *fnext;
41 spin_lock(&fctx->lock);
42 list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
44 fence->work(fence->priv, false);
45 fence->channel = NULL;
46 list_del(&fence->head);
47 nouveau_fence_unref(&fence);
49 spin_unlock(&fctx->lock);
53 nouveau_fence_context_new(struct nouveau_fence_chan *fctx)
55 INIT_LIST_HEAD(&fctx->flip);
56 INIT_LIST_HEAD(&fctx->pending);
57 spin_lock_init(&fctx->lock);
61 nouveau_fence_update(struct nouveau_channel *chan)
63 struct nouveau_fence_priv *priv = chan->drm->fence;
64 struct nouveau_fence_chan *fctx = chan->fence;
65 struct nouveau_fence *fence, *fnext;
67 spin_lock(&fctx->lock);
68 list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
69 if (priv->read(chan) < fence->sequence)
73 fence->work(fence->priv, true);
74 fence->channel = NULL;
75 list_del(&fence->head);
76 nouveau_fence_unref(&fence);
78 spin_unlock(&fctx->lock);
82 nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan)
84 struct nouveau_fence_priv *priv = chan->drm->fence;
85 struct nouveau_fence_chan *fctx = chan->fence;
88 fence->channel = chan;
89 fence->timeout = jiffies + (3 * DRM_HZ);
90 fence->sequence = ++fctx->sequence;
92 ret = priv->emit(fence);
94 kref_get(&fence->kref);
95 spin_lock(&fctx->lock);
96 list_add_tail(&fence->head, &fctx->pending);
97 spin_unlock(&fctx->lock);
104 nouveau_fence_done(struct nouveau_fence *fence)
107 nouveau_fence_update(fence->channel);
108 return !fence->channel;
112 nouveau_fence_wait(struct nouveau_fence *fence, bool lazy, bool intr)
114 unsigned long sleep_time = NSEC_PER_MSEC / 1000;
118 while (!nouveau_fence_done(fence)) {
119 if (fence->timeout && time_after_eq(jiffies, fence->timeout)) {
124 __set_current_state(intr ? TASK_INTERRUPTIBLE :
125 TASK_UNINTERRUPTIBLE);
127 t = ktime_set(0, sleep_time);
128 schedule_hrtimeout(&t, HRTIMER_MODE_REL);
130 if (sleep_time > NSEC_PER_MSEC)
131 sleep_time = NSEC_PER_MSEC;
134 if (intr && signal_pending(current)) {
140 __set_current_state(TASK_RUNNING);
145 nouveau_fence_sync(struct nouveau_fence *fence, struct nouveau_channel *chan)
147 struct nouveau_fence_priv *priv = chan->drm->fence;
148 struct nouveau_channel *prev;
151 prev = fence ? fence->channel : NULL;
153 if (unlikely(prev != chan && !nouveau_fence_done(fence))) {
154 ret = priv->sync(fence, prev, chan);
156 ret = nouveau_fence_wait(fence, true, false);
164 nouveau_fence_del(struct kref *kref)
166 struct nouveau_fence *fence = container_of(kref, typeof(*fence), kref);
171 nouveau_fence_unref(struct nouveau_fence **pfence)
174 kref_put(&(*pfence)->kref, nouveau_fence_del);
178 struct nouveau_fence *
179 nouveau_fence_ref(struct nouveau_fence *fence)
181 kref_get(&fence->kref);
186 nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **pfence)
188 struct nouveau_fence *fence;
191 if (unlikely(!chan->fence))
194 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
197 kref_init(&fence->kref);
200 ret = nouveau_fence_emit(fence, chan);
202 nouveau_fence_unref(&fence);