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.
29 #include <linux/ktime.h>
30 #include <linux/hrtimer.h>
32 #include "nouveau_drm.h"
33 #include "nouveau_dma.h"
34 #include "nouveau_fence.h"
36 #include <engine/fifo.h>
39 struct work_struct base;
40 struct list_head head;
46 nouveau_fence_signal(struct nouveau_fence *fence)
48 struct fence_work *work, *temp;
50 list_for_each_entry_safe(work, temp, &fence->work, head) {
51 schedule_work(&work->base);
52 list_del(&work->head);
55 fence->channel = NULL;
56 list_del(&fence->head);
60 nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
62 struct nouveau_fence *fence, *fnext;
63 spin_lock(&fctx->lock);
64 list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
65 nouveau_fence_signal(fence);
67 spin_unlock(&fctx->lock);
71 nouveau_fence_context_new(struct nouveau_fence_chan *fctx)
73 INIT_LIST_HEAD(&fctx->flip);
74 INIT_LIST_HEAD(&fctx->pending);
75 spin_lock_init(&fctx->lock);
79 nouveau_fence_work_handler(struct work_struct *kwork)
81 struct fence_work *work = container_of(kwork, typeof(*work), base);
82 work->func(work->data);
87 nouveau_fence_work(struct nouveau_fence *fence,
88 void (*func)(void *), void *data)
90 struct nouveau_channel *chan = fence->channel;
91 struct nouveau_fence_chan *fctx;
92 struct fence_work *work = NULL;
94 if (nouveau_fence_done(fence)) {
100 work = kmalloc(sizeof(*work), GFP_KERNEL);
102 WARN_ON(nouveau_fence_wait(fence, false, false));
107 spin_lock(&fctx->lock);
108 if (!fence->channel) {
109 spin_unlock(&fctx->lock);
115 INIT_WORK(&work->base, nouveau_fence_work_handler);
118 list_add(&work->head, &fence->work);
119 spin_unlock(&fctx->lock);
123 nouveau_fence_update(struct nouveau_channel *chan)
125 struct nouveau_fence_chan *fctx = chan->fence;
126 struct nouveau_fence *fence, *fnext;
128 spin_lock(&fctx->lock);
129 list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
130 if (fctx->read(chan) < fence->sequence)
133 nouveau_fence_signal(fence);
134 nouveau_fence_unref(&fence);
136 spin_unlock(&fctx->lock);
140 nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan)
142 struct nouveau_fence_chan *fctx = chan->fence;
145 fence->channel = chan;
146 fence->timeout = jiffies + (15 * HZ);
147 fence->sequence = ++fctx->sequence;
149 ret = fctx->emit(fence);
151 kref_get(&fence->kref);
152 spin_lock(&fctx->lock);
153 list_add_tail(&fence->head, &fctx->pending);
154 spin_unlock(&fctx->lock);
161 nouveau_fence_done(struct nouveau_fence *fence)
164 nouveau_fence_update(fence->channel);
165 return !fence->channel;
169 nouveau_fence_wait_uevent_handler(void *data, int index)
171 struct nouveau_fence_priv *priv = data;
172 wake_up_all(&priv->waiting);
173 return NVKM_EVENT_KEEP;
177 nouveau_fence_wait_uevent(struct nouveau_fence *fence, bool intr)
180 struct nouveau_channel *chan = fence->channel;
181 struct nouveau_fifo *pfifo = nouveau_fifo(chan->drm->device);
182 struct nouveau_fence_priv *priv = chan->drm->fence;
183 struct nouveau_eventh *handler;
186 ret = nouveau_event_new(pfifo->uevent, 0,
187 nouveau_fence_wait_uevent_handler,
192 nouveau_event_get(handler);
194 if (fence->timeout) {
195 unsigned long timeout = fence->timeout - jiffies;
197 if (time_before(jiffies, fence->timeout)) {
199 ret = wait_event_interruptible_timeout(
201 nouveau_fence_done(fence),
204 ret = wait_event_timeout(priv->waiting,
205 nouveau_fence_done(fence),
211 fence->timeout = jiffies + ret;
212 if (time_after_eq(jiffies, fence->timeout))
217 ret = wait_event_interruptible(priv->waiting,
218 nouveau_fence_done(fence));
220 wait_event(priv->waiting, nouveau_fence_done(fence));
224 nouveau_event_ref(NULL, &handler);
225 if (unlikely(ret < 0))
232 nouveau_fence_wait(struct nouveau_fence *fence, bool lazy, bool intr)
234 struct nouveau_channel *chan = fence->channel;
235 struct nouveau_fence_priv *priv = chan ? chan->drm->fence : NULL;
236 unsigned long sleep_time = NSEC_PER_MSEC / 1000;
240 while (priv && priv->uevent && lazy && !nouveau_fence_done(fence)) {
241 ret = nouveau_fence_wait_uevent(fence, intr);
246 while (!nouveau_fence_done(fence)) {
247 if (fence->timeout && time_after_eq(jiffies, fence->timeout)) {
252 __set_current_state(intr ? TASK_INTERRUPTIBLE :
253 TASK_UNINTERRUPTIBLE);
255 t = ktime_set(0, sleep_time);
256 schedule_hrtimeout(&t, HRTIMER_MODE_REL);
258 if (sleep_time > NSEC_PER_MSEC)
259 sleep_time = NSEC_PER_MSEC;
262 if (intr && signal_pending(current)) {
268 __set_current_state(TASK_RUNNING);
273 nouveau_fence_sync(struct nouveau_fence *fence, struct nouveau_channel *chan)
275 struct nouveau_fence_chan *fctx = chan->fence;
276 struct nouveau_channel *prev;
279 prev = fence ? fence->channel : NULL;
281 if (unlikely(prev != chan && !nouveau_fence_done(fence))) {
282 ret = fctx->sync(fence, prev, chan);
284 ret = nouveau_fence_wait(fence, true, false);
292 nouveau_fence_del(struct kref *kref)
294 struct nouveau_fence *fence = container_of(kref, typeof(*fence), kref);
299 nouveau_fence_unref(struct nouveau_fence **pfence)
302 kref_put(&(*pfence)->kref, nouveau_fence_del);
306 struct nouveau_fence *
307 nouveau_fence_ref(struct nouveau_fence *fence)
310 kref_get(&fence->kref);
315 nouveau_fence_new(struct nouveau_channel *chan, bool sysmem,
316 struct nouveau_fence **pfence)
318 struct nouveau_fence *fence;
321 if (unlikely(!chan->fence))
324 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
328 INIT_LIST_HEAD(&fence->work);
329 fence->sysmem = sysmem;
330 kref_init(&fence->kref);
332 ret = nouveau_fence_emit(fence, chan);
334 nouveau_fence_unref(&fence);