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6ee73861 BS |
1 | /* |
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 | ||
760285e7 | 27 | #include <drm/drmP.h> |
6ee73861 | 28 | |
bd35fe5a MS |
29 | #include <linux/ktime.h> |
30 | #include <linux/hrtimer.h> | |
31 | ||
ebb945a9 | 32 | #include "nouveau_drm.h" |
6ee73861 | 33 | #include "nouveau_dma.h" |
ebb945a9 | 34 | #include "nouveau_fence.h" |
6ee73861 | 35 | |
e18c080f BS |
36 | #include <engine/fifo.h> |
37 | ||
5e120f6e BS |
38 | void |
39 | nouveau_fence_context_del(struct nouveau_fence_chan *fctx) | |
40 | { | |
41 | struct nouveau_fence *fence, *fnext; | |
42 | spin_lock(&fctx->lock); | |
43 | list_for_each_entry_safe(fence, fnext, &fctx->pending, head) { | |
44 | if (fence->work) | |
45 | fence->work(fence->priv, false); | |
46 | fence->channel = NULL; | |
47 | list_del(&fence->head); | |
48 | nouveau_fence_unref(&fence); | |
49 | } | |
50 | spin_unlock(&fctx->lock); | |
51 | } | |
52 | ||
53 | void | |
54 | nouveau_fence_context_new(struct nouveau_fence_chan *fctx) | |
55 | { | |
f589be88 | 56 | INIT_LIST_HEAD(&fctx->flip); |
5e120f6e BS |
57 | INIT_LIST_HEAD(&fctx->pending); |
58 | spin_lock_init(&fctx->lock); | |
59 | } | |
6ee73861 | 60 | |
ebb945a9 | 61 | static void |
6ee73861 BS |
62 | nouveau_fence_update(struct nouveau_channel *chan) |
63 | { | |
ebb945a9 | 64 | struct nouveau_fence_priv *priv = chan->drm->fence; |
e193b1d4 | 65 | struct nouveau_fence_chan *fctx = chan->fence; |
5e120f6e | 66 | struct nouveau_fence *fence, *fnext; |
6ee73861 | 67 | |
5e120f6e BS |
68 | spin_lock(&fctx->lock); |
69 | list_for_each_entry_safe(fence, fnext, &fctx->pending, head) { | |
70 | if (priv->read(chan) < fence->sequence) | |
b08abd4e BS |
71 | break; |
72 | ||
b08abd4e | 73 | if (fence->work) |
8ac3891b | 74 | fence->work(fence->priv, true); |
5e120f6e BS |
75 | fence->channel = NULL; |
76 | list_del(&fence->head); | |
d375e7d5 | 77 | nouveau_fence_unref(&fence); |
6ee73861 | 78 | } |
5e120f6e | 79 | spin_unlock(&fctx->lock); |
6ee73861 BS |
80 | } |
81 | ||
82 | int | |
d375e7d5 | 83 | nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan) |
6ee73861 | 84 | { |
ebb945a9 | 85 | struct nouveau_fence_priv *priv = chan->drm->fence; |
e193b1d4 | 86 | struct nouveau_fence_chan *fctx = chan->fence; |
6ee73861 BS |
87 | int ret; |
88 | ||
5e120f6e BS |
89 | fence->channel = chan; |
90 | fence->timeout = jiffies + (3 * DRM_HZ); | |
91 | fence->sequence = ++fctx->sequence; | |
6ee73861 | 92 | |
5e120f6e BS |
93 | ret = priv->emit(fence); |
94 | if (!ret) { | |
95 | kref_get(&fence->kref); | |
96 | spin_lock(&fctx->lock); | |
97 | list_add_tail(&fence->head, &fctx->pending); | |
98 | spin_unlock(&fctx->lock); | |
529c4959 | 99 | } |
6ee73861 | 100 | |
5e120f6e | 101 | return ret; |
6ee73861 BS |
102 | } |
103 | ||
6ee73861 | 104 | bool |
d375e7d5 | 105 | nouveau_fence_done(struct nouveau_fence *fence) |
6ee73861 | 106 | { |
d375e7d5 BS |
107 | if (fence->channel) |
108 | nouveau_fence_update(fence->channel); | |
109 | return !fence->channel; | |
6ee73861 BS |
110 | } |
111 | ||
e18c080f BS |
112 | struct nouveau_fence_uevent { |
113 | struct nouveau_eventh handler; | |
114 | struct nouveau_fence_priv *priv; | |
115 | }; | |
116 | ||
117 | static int | |
118 | nouveau_fence_wait_uevent_handler(struct nouveau_eventh *event, int index) | |
119 | { | |
120 | struct nouveau_fence_uevent *uevent = | |
121 | container_of(event, struct nouveau_fence_uevent, handler); | |
122 | wake_up_all(&uevent->priv->waiting); | |
123 | return NVKM_EVENT_KEEP; | |
124 | } | |
125 | ||
126 | static int | |
127 | nouveau_fence_wait_uevent(struct nouveau_fence *fence, bool intr) | |
128 | ||
129 | { | |
130 | struct nouveau_channel *chan = fence->channel; | |
131 | struct nouveau_fifo *pfifo = nouveau_fifo(chan->drm->device); | |
132 | struct nouveau_fence_priv *priv = chan->drm->fence; | |
133 | struct nouveau_fence_uevent uevent = { | |
134 | .handler.func = nouveau_fence_wait_uevent_handler, | |
135 | .priv = priv, | |
136 | }; | |
137 | int ret = 0; | |
138 | ||
139 | nouveau_event_get(pfifo->uevent, 0, &uevent.handler); | |
140 | ||
141 | if (fence->timeout) { | |
142 | unsigned long timeout = fence->timeout - jiffies; | |
143 | ||
144 | if (time_before(jiffies, fence->timeout)) { | |
145 | if (intr) { | |
146 | ret = wait_event_interruptible_timeout( | |
147 | priv->waiting, | |
148 | nouveau_fence_done(fence), | |
149 | timeout); | |
150 | } else { | |
151 | ret = wait_event_timeout(priv->waiting, | |
152 | nouveau_fence_done(fence), | |
153 | timeout); | |
154 | } | |
155 | } | |
156 | ||
157 | if (ret >= 0) { | |
158 | fence->timeout = jiffies + ret; | |
159 | if (time_after_eq(jiffies, fence->timeout)) | |
160 | ret = -EBUSY; | |
161 | } | |
162 | } else { | |
163 | if (intr) { | |
164 | ret = wait_event_interruptible(priv->waiting, | |
165 | nouveau_fence_done(fence)); | |
166 | } else { | |
167 | wait_event(priv->waiting, nouveau_fence_done(fence)); | |
168 | } | |
169 | } | |
170 | ||
171 | nouveau_event_put(pfifo->uevent, 0, &uevent.handler); | |
172 | if (unlikely(ret < 0)) | |
173 | return ret; | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
6ee73861 | 178 | int |
875ac34a | 179 | nouveau_fence_wait(struct nouveau_fence *fence, bool lazy, bool intr) |
6ee73861 | 180 | { |
e18c080f BS |
181 | struct nouveau_channel *chan = fence->channel; |
182 | struct nouveau_fence_priv *priv = chan ? chan->drm->fence : NULL; | |
bd35fe5a MS |
183 | unsigned long sleep_time = NSEC_PER_MSEC / 1000; |
184 | ktime_t t; | |
6ee73861 BS |
185 | int ret = 0; |
186 | ||
e18c080f BS |
187 | while (priv && priv->uevent && lazy && !nouveau_fence_done(fence)) { |
188 | ret = nouveau_fence_wait_uevent(fence, intr); | |
189 | if (ret < 0) | |
190 | return ret; | |
191 | } | |
192 | ||
d375e7d5 BS |
193 | while (!nouveau_fence_done(fence)) { |
194 | if (fence->timeout && time_after_eq(jiffies, fence->timeout)) { | |
6ee73861 BS |
195 | ret = -EBUSY; |
196 | break; | |
197 | } | |
198 | ||
875ac34a BS |
199 | __set_current_state(intr ? TASK_INTERRUPTIBLE : |
200 | TASK_UNINTERRUPTIBLE); | |
bd35fe5a MS |
201 | if (lazy) { |
202 | t = ktime_set(0, sleep_time); | |
203 | schedule_hrtimeout(&t, HRTIMER_MODE_REL); | |
204 | sleep_time *= 2; | |
205 | if (sleep_time > NSEC_PER_MSEC) | |
206 | sleep_time = NSEC_PER_MSEC; | |
207 | } | |
6ee73861 BS |
208 | |
209 | if (intr && signal_pending(current)) { | |
9ddc8c52 | 210 | ret = -ERESTARTSYS; |
6ee73861 BS |
211 | break; |
212 | } | |
213 | } | |
214 | ||
215 | __set_current_state(TASK_RUNNING); | |
d375e7d5 BS |
216 | return ret; |
217 | } | |
218 | ||
5e120f6e BS |
219 | int |
220 | nouveau_fence_sync(struct nouveau_fence *fence, struct nouveau_channel *chan) | |
221 | { | |
ebb945a9 | 222 | struct nouveau_fence_priv *priv = chan->drm->fence; |
906c033e | 223 | struct nouveau_channel *prev; |
5e120f6e BS |
224 | int ret = 0; |
225 | ||
ebb945a9 | 226 | prev = fence ? fence->channel : NULL; |
906c033e BS |
227 | if (prev) { |
228 | if (unlikely(prev != chan && !nouveau_fence_done(fence))) { | |
229 | ret = priv->sync(fence, prev, chan); | |
230 | if (unlikely(ret)) | |
231 | ret = nouveau_fence_wait(fence, true, false); | |
232 | } | |
5e120f6e BS |
233 | } |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
d375e7d5 BS |
238 | static void |
239 | nouveau_fence_del(struct kref *kref) | |
240 | { | |
241 | struct nouveau_fence *fence = container_of(kref, typeof(*fence), kref); | |
242 | kfree(fence); | |
243 | } | |
244 | ||
245 | void | |
246 | nouveau_fence_unref(struct nouveau_fence **pfence) | |
247 | { | |
248 | if (*pfence) | |
249 | kref_put(&(*pfence)->kref, nouveau_fence_del); | |
250 | *pfence = NULL; | |
251 | } | |
252 | ||
253 | struct nouveau_fence * | |
254 | nouveau_fence_ref(struct nouveau_fence *fence) | |
255 | { | |
256 | kref_get(&fence->kref); | |
257 | return fence; | |
258 | } | |
259 | ||
260 | int | |
261 | nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **pfence) | |
262 | { | |
263 | struct nouveau_fence *fence; | |
264 | int ret = 0; | |
6ee73861 | 265 | |
e193b1d4 | 266 | if (unlikely(!chan->fence)) |
5e120f6e BS |
267 | return -ENODEV; |
268 | ||
d375e7d5 BS |
269 | fence = kzalloc(sizeof(*fence), GFP_KERNEL); |
270 | if (!fence) | |
271 | return -ENOMEM; | |
272 | kref_init(&fence->kref); | |
273 | ||
b5d8f052 CD |
274 | ret = nouveau_fence_emit(fence, chan); |
275 | if (ret) | |
276 | nouveau_fence_unref(&fence); | |
d375e7d5 BS |
277 | |
278 | *pfence = fence; | |
6ee73861 BS |
279 | return ret; |
280 | } |