blob: 574c36b492ee4556568f836e48bf7798aff467d0 [file] [log] [blame]
Ben Skeggs6ee73862009-12-11 19:24:15 +10001/*
2 * Copyright (C) 2007 Ben Skeggs.
3 * All Rights Reserved.
4 *
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:
12 *
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.
16 *
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.
24 *
25 */
26
David Howells760285e2012-10-02 18:01:07 +010027#include <drm/drmP.h>
Ben Skeggs6ee73862009-12-11 19:24:15 +100028
Marcin Slusarzbd35fe52011-03-09 14:22:19 +010029#include <linux/ktime.h>
30#include <linux/hrtimer.h>
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010031#include <trace/events/fence.h>
Marcin Slusarzbd35fe52011-03-09 14:22:19 +010032
Ben Skeggs867920f2014-08-10 04:10:25 +100033#include <nvif/notify.h>
34#include <nvif/event.h>
35
Ben Skeggsebb945a2012-07-20 08:17:34 +100036#include "nouveau_drm.h"
Ben Skeggs6ee73862009-12-11 19:24:15 +100037#include "nouveau_dma.h"
Ben Skeggsebb945a2012-07-20 08:17:34 +100038#include "nouveau_fence.h"
Ben Skeggs6ee73862009-12-11 19:24:15 +100039
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010040static const struct fence_ops nouveau_fence_ops_uevent;
41static const struct fence_ops nouveau_fence_ops_legacy;
42
43static inline struct nouveau_fence *
44from_fence(struct fence *fence)
45{
46 return container_of(fence, struct nouveau_fence, base);
47}
48
49static inline struct nouveau_fence_chan *
50nouveau_fctx(struct nouveau_fence *fence)
51{
52 return container_of(fence->base.lock, struct nouveau_fence_chan, lock);
53}
Ben Skeggsc4c70442013-05-07 09:48:30 +100054
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +100055static int
Ben Skeggsc4c70442013-05-07 09:48:30 +100056nouveau_fence_signal(struct nouveau_fence *fence)
57{
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +100058 int drop = 0;
59
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010060 fence_signal_locked(&fence->base);
61 list_del(&fence->head);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +100062 rcu_assign_pointer(fence->channel, NULL);
Ben Skeggsc4c70442013-05-07 09:48:30 +100063
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010064 if (test_bit(FENCE_FLAG_USER_BITS, &fence->base.flags)) {
65 struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
66
67 if (!--fctx->notify_ref)
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +100068 drop = 1;
Ben Skeggsc4c70442013-05-07 09:48:30 +100069 }
70
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010071 fence_put(&fence->base);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +100072 return drop;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010073}
74
75static struct nouveau_fence *
76nouveau_local_fence(struct fence *fence, struct nouveau_drm *drm) {
77 struct nouveau_fence_priv *priv = (void*)drm->fence;
78
79 if (fence->ops != &nouveau_fence_ops_legacy &&
80 fence->ops != &nouveau_fence_ops_uevent)
81 return NULL;
82
83 if (fence->context < priv->context_base ||
84 fence->context >= priv->context_base + priv->contexts)
85 return NULL;
86
87 return from_fence(fence);
Ben Skeggsc4c70442013-05-07 09:48:30 +100088}
89
Ben Skeggs5e120f62012-04-30 13:55:29 +100090void
91nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
92{
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010093 struct nouveau_fence *fence;
94
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +010095 spin_lock_irq(&fctx->lock);
96 while (!list_empty(&fctx->pending)) {
97 fence = list_entry(fctx->pending.next, typeof(*fence), head);
98
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +100099 if (nouveau_fence_signal(fence))
100 nvif_notify_put(&fctx->notify);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100101 }
102 spin_unlock_irq(&fctx->lock);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000103
104 nvif_notify_fini(&fctx->notify);
105 fctx->dead = 1;
106
107 /*
108 * Ensure that all accesses to fence->channel complete before freeing
109 * the channel.
110 */
111 synchronize_rcu();
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100112}
113
114static void
Maarten Lankhorst15a996b2014-09-29 10:06:18 +0200115nouveau_fence_context_put(struct kref *fence_ref)
116{
117 kfree(container_of(fence_ref, struct nouveau_fence_chan, fence_ref));
118}
119
120void
121nouveau_fence_context_free(struct nouveau_fence_chan *fctx)
122{
123 kref_put(&fctx->fence_ref, nouveau_fence_context_put);
124}
125
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000126static int
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100127nouveau_fence_update(struct nouveau_channel *chan, struct nouveau_fence_chan *fctx)
128{
129 struct nouveau_fence *fence;
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000130 int drop = 0;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100131 u32 seq = fctx->read(chan);
132
133 while (!list_empty(&fctx->pending)) {
134 fence = list_entry(fctx->pending.next, typeof(*fence), head);
135
136 if ((int)(seq - fence->base.seqno) < 0)
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000137 break;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100138
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000139 drop |= nouveau_fence_signal(fence);
Ben Skeggs5e120f62012-04-30 13:55:29 +1000140 }
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000141
142 return drop;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100143}
144
145static int
146nouveau_fence_wait_uevent_handler(struct nvif_notify *notify)
147{
148 struct nouveau_fence_chan *fctx =
149 container_of(notify, typeof(*fctx), notify);
150 unsigned long flags;
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000151 int ret = NVIF_NOTIFY_KEEP;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100152
153 spin_lock_irqsave(&fctx->lock, flags);
154 if (!list_empty(&fctx->pending)) {
155 struct nouveau_fence *fence;
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000156 struct nouveau_channel *chan;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100157
158 fence = list_entry(fctx->pending.next, typeof(*fence), head);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000159 chan = rcu_dereference_protected(fence->channel, lockdep_is_held(&fctx->lock));
160 if (nouveau_fence_update(fence->channel, fctx))
161 ret = NVIF_NOTIFY_DROP;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100162 }
163 spin_unlock_irqrestore(&fctx->lock, flags);
164
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000165 return ret;
Ben Skeggs5e120f62012-04-30 13:55:29 +1000166}
167
168void
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100169nouveau_fence_context_new(struct nouveau_channel *chan, struct nouveau_fence_chan *fctx)
Ben Skeggs5e120f62012-04-30 13:55:29 +1000170{
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100171 struct nouveau_fence_priv *priv = (void*)chan->drm->fence;
Ben Skeggsa01ca782015-08-20 14:54:15 +1000172 struct nouveau_cli *cli = (void *)chan->user.client;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100173 int ret;
174
Ben Skeggsf589be82012-07-22 11:55:54 +1000175 INIT_LIST_HEAD(&fctx->flip);
Ben Skeggs5e120f62012-04-30 13:55:29 +1000176 INIT_LIST_HEAD(&fctx->pending);
177 spin_lock_init(&fctx->lock);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100178 fctx->context = priv->context_base + chan->chid;
179
Maarten Lankhorst15a996b2014-09-29 10:06:18 +0200180 if (chan == chan->drm->cechan)
181 strcpy(fctx->name, "copy engine channel");
182 else if (chan == chan->drm->channel)
183 strcpy(fctx->name, "generic kernel channel");
184 else
Ben Skeggs989aa5b2015-01-12 12:33:37 +1000185 strcpy(fctx->name, nvxx_client(&cli->base)->name);
Maarten Lankhorst15a996b2014-09-29 10:06:18 +0200186
187 kref_init(&fctx->fence_ref);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100188 if (!priv->uevent)
189 return;
190
Ben Skeggsa01ca782015-08-20 14:54:15 +1000191 ret = nvif_notify_init(&chan->user, nouveau_fence_wait_uevent_handler,
192 false, G82_CHANNEL_DMA_V0_NTFY_UEVENT,
193 &(struct nvif_notify_uevent_req) { },
194 sizeof(struct nvif_notify_uevent_req),
195 sizeof(struct nvif_notify_uevent_rep),
196 &fctx->notify);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100197
198 WARN_ON(ret);
Ben Skeggs5e120f62012-04-30 13:55:29 +1000199}
Ben Skeggs6ee73862009-12-11 19:24:15 +1000200
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100201struct nouveau_fence_work {
202 struct work_struct work;
203 struct fence_cb cb;
204 void (*func)(void *);
205 void *data;
206};
207
Ben Skeggsebb945a2012-07-20 08:17:34 +1000208static void
Ben Skeggsc4c70442013-05-07 09:48:30 +1000209nouveau_fence_work_handler(struct work_struct *kwork)
210{
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100211 struct nouveau_fence_work *work = container_of(kwork, typeof(*work), work);
Ben Skeggsc4c70442013-05-07 09:48:30 +1000212 work->func(work->data);
213 kfree(work);
214}
215
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100216static void nouveau_fence_work_cb(struct fence *fence, struct fence_cb *cb)
217{
218 struct nouveau_fence_work *work = container_of(cb, typeof(*work), cb);
219
220 schedule_work(&work->work);
221}
222
Ben Skeggsc4c70442013-05-07 09:48:30 +1000223void
Maarten Lankhorstf2c24b82014-04-02 17:14:48 +0200224nouveau_fence_work(struct fence *fence,
Ben Skeggsc4c70442013-05-07 09:48:30 +1000225 void (*func)(void *), void *data)
226{
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100227 struct nouveau_fence_work *work;
Ben Skeggsc4c70442013-05-07 09:48:30 +1000228
Maarten Lankhorstf2c24b82014-04-02 17:14:48 +0200229 if (fence_is_signaled(fence))
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100230 goto err;
Ben Skeggsc4c70442013-05-07 09:48:30 +1000231
Ben Skeggsc4c70442013-05-07 09:48:30 +1000232 work = kmalloc(sizeof(*work), GFP_KERNEL);
233 if (!work) {
Maarten Lankhorstbb6178b2014-01-09 11:03:15 +0100234 /*
235 * this might not be a nouveau fence any more,
236 * so force a lazy wait here
237 */
Maarten Lankhorstf2c24b82014-04-02 17:14:48 +0200238 WARN_ON(nouveau_fence_wait((struct nouveau_fence *)fence,
Maarten Lankhorstbb6178b2014-01-09 11:03:15 +0100239 true, false));
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100240 goto err;
Ben Skeggsc4c70442013-05-07 09:48:30 +1000241 }
242
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100243 INIT_WORK(&work->work, nouveau_fence_work_handler);
Ben Skeggsc4c70442013-05-07 09:48:30 +1000244 work->func = func;
245 work->data = data;
Ben Skeggsc4c70442013-05-07 09:48:30 +1000246
Maarten Lankhorstf2c24b82014-04-02 17:14:48 +0200247 if (fence_add_callback(fence, &work->cb, nouveau_fence_work_cb) < 0)
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100248 goto err_free;
249 return;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000250
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100251err_free:
252 kfree(work);
253err:
254 func(data);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000255}
256
257int
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000258nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan)
Ben Skeggs6ee73862009-12-11 19:24:15 +1000259{
Ben Skeggse193b1d2012-07-19 10:51:42 +1000260 struct nouveau_fence_chan *fctx = chan->fence;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100261 struct nouveau_fence_priv *priv = (void*)chan->drm->fence;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000262 int ret;
263
Ben Skeggs5e120f62012-04-30 13:55:29 +1000264 fence->channel = chan;
Daniel Vetterbfd83032013-12-11 11:34:41 +0100265 fence->timeout = jiffies + (15 * HZ);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000266
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100267 if (priv->uevent)
268 fence_init(&fence->base, &nouveau_fence_ops_uevent,
Maarten Lankhorste3be4c22014-09-16 11:15:07 +0200269 &fctx->lock, fctx->context, ++fctx->sequence);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100270 else
271 fence_init(&fence->base, &nouveau_fence_ops_legacy,
Maarten Lankhorste3be4c22014-09-16 11:15:07 +0200272 &fctx->lock, fctx->context, ++fctx->sequence);
Maarten Lankhorst15a996b2014-09-29 10:06:18 +0200273 kref_get(&fctx->fence_ref);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100274
275 trace_fence_emit(&fence->base);
Ben Skeggs827520c2013-02-14 13:20:17 +1000276 ret = fctx->emit(fence);
Ben Skeggs5e120f62012-04-30 13:55:29 +1000277 if (!ret) {
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100278 fence_get(&fence->base);
279 spin_lock_irq(&fctx->lock);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000280
281 if (nouveau_fence_update(chan, fctx))
282 nvif_notify_put(&fctx->notify);
283
Ben Skeggs5e120f62012-04-30 13:55:29 +1000284 list_add_tail(&fence->head, &fctx->pending);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100285 spin_unlock_irq(&fctx->lock);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000286 }
287
Ben Skeggs5e120f62012-04-30 13:55:29 +1000288 return ret;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000289}
290
Ben Skeggs6ee73862009-12-11 19:24:15 +1000291bool
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000292nouveau_fence_done(struct nouveau_fence *fence)
Ben Skeggs6ee73862009-12-11 19:24:15 +1000293{
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100294 if (fence->base.ops == &nouveau_fence_ops_legacy ||
295 fence->base.ops == &nouveau_fence_ops_uevent) {
296 struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000297 struct nouveau_channel *chan;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100298 unsigned long flags;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000299
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100300 if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->base.flags))
301 return true;
Ben Skeggs79ca2772014-08-10 04:10:20 +1000302
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100303 spin_lock_irqsave(&fctx->lock, flags);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000304 chan = rcu_dereference_protected(fence->channel, lockdep_is_held(&fctx->lock));
305 if (chan && nouveau_fence_update(chan, fctx))
306 nvif_notify_put(&fctx->notify);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100307 spin_unlock_irqrestore(&fctx->lock, flags);
Ben Skeggse18c0802013-01-31 14:57:33 +1000308 }
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100309 return fence_is_signaled(&fence->base);
Ben Skeggse18c0802013-01-31 14:57:33 +1000310}
311
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100312static long
313nouveau_fence_wait_legacy(struct fence *f, bool intr, long wait)
Ben Skeggs6ee73862009-12-11 19:24:15 +1000314{
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100315 struct nouveau_fence *fence = from_fence(f);
Marcin Slusarzbd35fe52011-03-09 14:22:19 +0100316 unsigned long sleep_time = NSEC_PER_MSEC / 1000;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100317 unsigned long t = jiffies, timeout = t + wait;
Ben Skeggse18c0802013-01-31 14:57:33 +1000318
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000319 while (!nouveau_fence_done(fence)) {
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100320 ktime_t kt;
321
322 t = jiffies;
323
324 if (wait != MAX_SCHEDULE_TIMEOUT && time_after_eq(t, timeout)) {
325 __set_current_state(TASK_RUNNING);
326 return 0;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000327 }
328
Ben Skeggs875ac342012-04-30 12:51:48 +1000329 __set_current_state(intr ? TASK_INTERRUPTIBLE :
330 TASK_UNINTERRUPTIBLE);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100331
332 kt = ktime_set(0, sleep_time);
333 schedule_hrtimeout(&kt, HRTIMER_MODE_REL);
334 sleep_time *= 2;
335 if (sleep_time > NSEC_PER_MSEC)
336 sleep_time = NSEC_PER_MSEC;
337
338 if (intr && signal_pending(current))
339 return -ERESTARTSYS;
340 }
341
342 __set_current_state(TASK_RUNNING);
343
344 return timeout - t;
345}
346
347static int
348nouveau_fence_wait_busy(struct nouveau_fence *fence, bool intr)
349{
350 int ret = 0;
351
352 while (!nouveau_fence_done(fence)) {
353 if (time_after_eq(jiffies, fence->timeout)) {
354 ret = -EBUSY;
355 break;
Marcin Slusarzbd35fe52011-03-09 14:22:19 +0100356 }
Ben Skeggs6ee73862009-12-11 19:24:15 +1000357
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100358 __set_current_state(intr ?
359 TASK_INTERRUPTIBLE :
360 TASK_UNINTERRUPTIBLE);
361
Ben Skeggs6ee73862009-12-11 19:24:15 +1000362 if (intr && signal_pending(current)) {
Ben Skeggs9ddc8c52009-12-15 11:04:25 +1000363 ret = -ERESTARTSYS;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000364 break;
365 }
366 }
367
368 __set_current_state(TASK_RUNNING);
Ben Skeggs6ee73862009-12-11 19:24:15 +1000369 return ret;
370}
371
Ben Skeggs5e120f62012-04-30 13:55:29 +1000372int
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100373nouveau_fence_wait(struct nouveau_fence *fence, bool lazy, bool intr)
374{
375 long ret;
376
377 if (!lazy)
378 return nouveau_fence_wait_busy(fence, intr);
379
380 ret = fence_wait_timeout(&fence->base, intr, 15 * HZ);
381 if (ret < 0)
382 return ret;
383 else if (!ret)
384 return -EBUSY;
385 else
386 return 0;
387}
388
389int
Maarten Lankhorste3be4c22014-09-16 11:15:07 +0200390nouveau_fence_sync(struct nouveau_bo *nvbo, struct nouveau_channel *chan, bool exclusive, bool intr)
Ben Skeggs5e120f62012-04-30 13:55:29 +1000391{
Ben Skeggs827520c2013-02-14 13:20:17 +1000392 struct nouveau_fence_chan *fctx = chan->fence;
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200393 struct fence *fence;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100394 struct reservation_object *resv = nvbo->bo.resv;
395 struct reservation_object_list *fobj;
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200396 struct nouveau_fence *f;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100397 int ret = 0, i;
Ben Skeggs5e120f62012-04-30 13:55:29 +1000398
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200399 if (!exclusive) {
400 ret = reservation_object_reserve_shared(resv);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100401
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200402 if (ret)
403 return ret;
Ben Skeggs5e120f62012-04-30 13:55:29 +1000404 }
405
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100406 fobj = reservation_object_get_list(resv);
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200407 fence = reservation_object_get_excl(resv);
408
409 if (fence && (!exclusive || !fobj || !fobj->shared_count)) {
410 struct nouveau_channel *prev = NULL;
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000411 bool must_wait = true;
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200412
413 f = nouveau_local_fence(fence, chan->drm);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000414 if (f) {
415 rcu_read_lock();
416 prev = rcu_dereference(f->channel);
417 if (prev && (prev == chan || fctx->sync(f, prev, chan) == 0))
418 must_wait = false;
419 rcu_read_unlock();
420 }
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200421
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000422 if (must_wait)
Maarten Lankhorste3be4c22014-09-16 11:15:07 +0200423 ret = fence_wait(fence, intr);
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200424
425 return ret;
426 }
427
428 if (!exclusive || !fobj)
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100429 return ret;
430
431 for (i = 0; i < fobj->shared_count && !ret; ++i) {
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200432 struct nouveau_channel *prev = NULL;
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000433 bool must_wait = true;
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200434
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100435 fence = rcu_dereference_protected(fobj->shared[i],
436 reservation_object_held(resv));
437
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200438 f = nouveau_local_fence(fence, chan->drm);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000439 if (f) {
440 rcu_read_lock();
441 prev = rcu_dereference(f->channel);
442 if (prev && (prev == chan || fctx->sync(f, prev, chan) == 0))
443 must_wait = false;
444 rcu_read_unlock();
445 }
Maarten Lankhorst809e9442014-04-09 16:19:30 +0200446
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000447 if (must_wait)
Maarten Lankhorste3be4c22014-09-16 11:15:07 +0200448 ret = fence_wait(fence, intr);
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100449 }
450
451 return ret;
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000452}
453
454void
455nouveau_fence_unref(struct nouveau_fence **pfence)
456{
457 if (*pfence)
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100458 fence_put(&(*pfence)->base);
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000459 *pfence = NULL;
460}
461
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000462int
Ben Skeggs264ce192013-02-14 13:43:21 +1000463nouveau_fence_new(struct nouveau_channel *chan, bool sysmem,
464 struct nouveau_fence **pfence)
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000465{
466 struct nouveau_fence *fence;
467 int ret = 0;
468
Ben Skeggse193b1d2012-07-19 10:51:42 +1000469 if (unlikely(!chan->fence))
Ben Skeggs5e120f62012-04-30 13:55:29 +1000470 return -ENODEV;
471
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000472 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
473 if (!fence)
474 return -ENOMEM;
Ben Skeggs264ce192013-02-14 13:43:21 +1000475
476 fence->sysmem = sysmem;
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000477
Cong Dingb5d8f052013-01-15 18:19:49 +0100478 ret = nouveau_fence_emit(fence, chan);
479 if (ret)
480 nouveau_fence_unref(&fence);
Ben Skeggsd375e7d52012-04-30 13:30:00 +1000481
482 *pfence = fence;
483 return ret;
484}
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100485
486static const char *nouveau_fence_get_get_driver_name(struct fence *fence)
487{
488 return "nouveau";
489}
490
491static const char *nouveau_fence_get_timeline_name(struct fence *f)
492{
493 struct nouveau_fence *fence = from_fence(f);
494 struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
495
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000496 return !fctx->dead ? fctx->name : "dead channel";
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100497}
498
499/*
500 * In an ideal world, read would not assume the channel context is still alive.
501 * This function may be called from another device, running into free memory as a
502 * result. The drm node should still be there, so we can derive the index from
503 * the fence context.
504 */
505static bool nouveau_fence_is_signaled(struct fence *f)
506{
507 struct nouveau_fence *fence = from_fence(f);
508 struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000509 struct nouveau_channel *chan;
510 bool ret = false;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100511
Maarten Lankhorst0ec5f022014-12-01 19:11:06 +1000512 rcu_read_lock();
513 chan = rcu_dereference(fence->channel);
514 if (chan)
515 ret = (int)(fctx->read(chan) - fence->base.seqno) >= 0;
516 rcu_read_unlock();
517
518 return ret;
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100519}
520
521static bool nouveau_fence_no_signaling(struct fence *f)
522{
523 struct nouveau_fence *fence = from_fence(f);
524
525 /*
526 * caller should have a reference on the fence,
527 * else fence could get freed here
528 */
529 WARN_ON(atomic_read(&fence->base.refcount.refcount) <= 1);
530
531 /*
532 * This needs uevents to work correctly, but fence_add_callback relies on
533 * being able to enable signaling. It will still get signaled eventually,
534 * just not right away.
535 */
536 if (nouveau_fence_is_signaled(f)) {
537 list_del(&fence->head);
538
539 fence_put(&fence->base);
540 return false;
541 }
542
543 return true;
544}
545
Maarten Lankhorst15a996b2014-09-29 10:06:18 +0200546static void nouveau_fence_release(struct fence *f)
547{
548 struct nouveau_fence *fence = from_fence(f);
549 struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
550
551 kref_put(&fctx->fence_ref, nouveau_fence_context_put);
552 fence_free(&fence->base);
553}
554
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100555static const struct fence_ops nouveau_fence_ops_legacy = {
556 .get_driver_name = nouveau_fence_get_get_driver_name,
557 .get_timeline_name = nouveau_fence_get_timeline_name,
558 .enable_signaling = nouveau_fence_no_signaling,
559 .signaled = nouveau_fence_is_signaled,
560 .wait = nouveau_fence_wait_legacy,
Maarten Lankhorst15a996b2014-09-29 10:06:18 +0200561 .release = nouveau_fence_release
Maarten Lankhorst29ba89b2014-01-09 11:03:11 +0100562};
563
564static bool nouveau_fence_enable_signaling(struct fence *f)
565{
566 struct nouveau_fence *fence = from_fence(f);
567 struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
568 bool ret;
569
570 if (!fctx->notify_ref++)
571 nvif_notify_get(&fctx->notify);
572
573 ret = nouveau_fence_no_signaling(f);
574 if (ret)
575 set_bit(FENCE_FLAG_USER_BITS, &fence->base.flags);
576 else if (!--fctx->notify_ref)
577 nvif_notify_put(&fctx->notify);
578
579 return ret;
580}
581
582static const struct fence_ops nouveau_fence_ops_uevent = {
583 .get_driver_name = nouveau_fence_get_get_driver_name,
584 .get_timeline_name = nouveau_fence_get_timeline_name,
585 .enable_signaling = nouveau_fence_enable_signaling,
586 .signaled = nouveau_fence_is_signaled,
587 .wait = fence_default_wait,
588 .release = NULL
589};