1 /****************************************************************************
2 * Copyright (C) 2015 Intel Corporation. All Rights Reserved.
3 *
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:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 ***************************************************************************/
23
24 #include "pipe/p_screen.h"
25 #include "util/u_memory.h"
26 #include "os/os_time.h"
27
28 #include "swr_context.h"
29 #include "swr_screen.h"
30 #include "swr_fence.h"
31
32 #if defined(PIPE_CC_MSVC) // portable thread yield
33 #define sched_yield SwitchToThread
34 #endif
35
36 /*
37 * Fence callback, called by back-end thread on completion of all rendering up
38 * to SwrSync call.
39 */
40 static void
swr_fence_cb(uint64_t userData,uint64_t userData2,uint64_t userData3)41 swr_fence_cb(uint64_t userData, uint64_t userData2, uint64_t userData3)
42 {
43 struct swr_fence *fence = (struct swr_fence *)userData;
44
45 /* Complete all work attached to the fence */
46 swr_fence_do_work(fence);
47
48 /* Correct value is in SwrSync data, and not the fence write field. */
49 fence->read = userData2;
50 }
51
52 /*
53 * Submit an existing fence.
54 */
55 void
swr_fence_submit(struct swr_context * ctx,struct pipe_fence_handle * fh)56 swr_fence_submit(struct swr_context *ctx, struct pipe_fence_handle *fh)
57 {
58 struct swr_fence *fence = swr_fence(fh);
59
60 fence->write++;
61 fence->pending = TRUE;
62 SwrSync(ctx->swrContext, swr_fence_cb, (uint64_t)fence, fence->write, 0);
63 }
64
65 /*
66 * Create a new fence object.
67 */
68 struct pipe_fence_handle *
swr_fence_create()69 swr_fence_create()
70 {
71 static int fence_id = 0;
72 struct swr_fence *fence = CALLOC_STRUCT(swr_fence);
73 if (!fence)
74 return NULL;
75
76 pipe_reference_init(&fence->reference, 1);
77 fence->id = fence_id++;
78 fence->work.tail = &fence->work.head;
79
80 return (struct pipe_fence_handle *)fence;
81 }
82
83 /** Destroy a fence. Called when refcount hits zero. */
84 static void
swr_fence_destroy(struct swr_fence * fence)85 swr_fence_destroy(struct swr_fence *fence)
86 {
87 /* Complete any work left if fence was not submitted */
88 swr_fence_do_work(fence);
89 FREE(fence);
90 }
91
92 /**
93 * Set ptr = fence, with reference counting
94 */
95 void
swr_fence_reference(struct pipe_screen * screen,struct pipe_fence_handle ** ptr,struct pipe_fence_handle * f)96 swr_fence_reference(struct pipe_screen *screen,
97 struct pipe_fence_handle **ptr,
98 struct pipe_fence_handle *f)
99 {
100 struct swr_fence *fence = swr_fence(f);
101 struct swr_fence *old;
102
103 if (likely(ptr)) {
104 old = swr_fence(*ptr);
105 *ptr = f;
106 } else {
107 old = NULL;
108 }
109
110 if (pipe_reference(&old->reference, &fence->reference)) {
111 swr_fence_finish(screen, NULL, (struct pipe_fence_handle *) old, 0);
112 swr_fence_destroy(old);
113 }
114 }
115
116
117 /*
118 * Wait for the fence to finish.
119 */
120 boolean
swr_fence_finish(struct pipe_screen * screen,struct pipe_context * ctx,struct pipe_fence_handle * fence_handle,uint64_t timeout)121 swr_fence_finish(struct pipe_screen *screen,
122 struct pipe_context *ctx,
123 struct pipe_fence_handle *fence_handle,
124 uint64_t timeout)
125 {
126 while (!swr_is_fence_done(fence_handle))
127 sched_yield();
128
129 swr_fence(fence_handle)->pending = FALSE;
130
131 return TRUE;
132 }
133
134
135 uint64_t
swr_get_timestamp(struct pipe_screen * screen)136 swr_get_timestamp(struct pipe_screen *screen)
137 {
138 return os_time_get_nano();
139 }
140
141
142 void
swr_fence_init(struct pipe_screen * p_screen)143 swr_fence_init(struct pipe_screen *p_screen)
144 {
145 p_screen->fence_reference = swr_fence_reference;
146 p_screen->fence_finish = swr_fence_finish;
147 p_screen->get_timestamp = swr_get_timestamp;
148
149 /* Create persistant StoreTiles "flush" fence, used to signal completion
150 * of flushing tile state back to resource texture, via StoreTiles. */
151 struct swr_screen *screen = swr_screen(p_screen);
152 screen->flush_fence = swr_fence_create();
153 }
154