1 /**************************************************************************
2 *
3 * Copyright 2011 Marek Olšák <maraeo@gmail.com>
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /*
29 * Authors:
30 * Marek Olšák <maraeo@gmail.com>
31 */
32
33 #include "main/glheader.h"
34 #include "main/macros.h"
35 #include "pipe/p_context.h"
36 #include "pipe/p_screen.h"
37 #include "st_context.h"
38 #include "st_cb_syncobj.h"
39
40 struct st_sync_object {
41 struct gl_sync_object b;
42
43 struct pipe_fence_handle *fence;
44 mtx_t mutex; /**< protects "fence" */
45 };
46
47
st_new_sync_object(struct gl_context * ctx)48 static struct gl_sync_object *st_new_sync_object(struct gl_context *ctx)
49 {
50 struct st_sync_object *so = CALLOC_STRUCT(st_sync_object);
51
52 mtx_init(&so->mutex, mtx_plain);
53 return &so->b;
54 }
55
st_delete_sync_object(struct gl_context * ctx,struct gl_sync_object * obj)56 static void st_delete_sync_object(struct gl_context *ctx,
57 struct gl_sync_object *obj)
58 {
59 struct pipe_screen *screen = st_context(ctx)->pipe->screen;
60 struct st_sync_object *so = (struct st_sync_object*)obj;
61
62 screen->fence_reference(screen, &so->fence, NULL);
63 mtx_destroy(&so->mutex);
64 free(so->b.Label);
65 free(so);
66 }
67
st_fence_sync(struct gl_context * ctx,struct gl_sync_object * obj,GLenum condition,GLbitfield flags)68 static void st_fence_sync(struct gl_context *ctx, struct gl_sync_object *obj,
69 GLenum condition, GLbitfield flags)
70 {
71 struct pipe_context *pipe = st_context(ctx)->pipe;
72 struct st_sync_object *so = (struct st_sync_object*)obj;
73
74 assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE && flags == 0);
75 assert(so->fence == NULL);
76
77 pipe->flush(pipe, &so->fence, PIPE_FLUSH_DEFERRED);
78 }
79
st_client_wait_sync(struct gl_context * ctx,struct gl_sync_object * obj,GLbitfield flags,GLuint64 timeout)80 static void st_client_wait_sync(struct gl_context *ctx,
81 struct gl_sync_object *obj,
82 GLbitfield flags, GLuint64 timeout)
83 {
84 struct pipe_context *pipe = st_context(ctx)->pipe;
85 struct pipe_screen *screen = pipe->screen;
86 struct st_sync_object *so = (struct st_sync_object*)obj;
87 struct pipe_fence_handle *fence = NULL;
88
89 /* If the fence doesn't exist, assume it's signalled. */
90 mtx_lock(&so->mutex);
91 if (!so->fence) {
92 mtx_unlock(&so->mutex);
93 so->b.StatusFlag = GL_TRUE;
94 return;
95 }
96
97 /* We need a local copy of the fence pointer, so that we can call
98 * fence_finish unlocked.
99 */
100 screen->fence_reference(screen, &fence, so->fence);
101 mtx_unlock(&so->mutex);
102
103 /* Section 4.1.2 of OpenGL 4.5 (Compatibility Profile) says:
104 * [...] if ClientWaitSync is called and all of the following are true:
105 * - the SYNC_FLUSH_COMMANDS_BIT bit is set in flags,
106 * - sync is unsignaled when ClientWaitSync is called,
107 * - and the calls to ClientWaitSync and FenceSync were issued from
108 * the same context,
109 * then the GL will behave as if the equivalent of Flush were inserted
110 * immediately after the creation of sync.
111 *
112 * Assume GL_SYNC_FLUSH_COMMANDS_BIT is always set, because applications
113 * forget to set it.
114 */
115 if (screen->fence_finish(screen, pipe, fence, timeout)) {
116 mtx_lock(&so->mutex);
117 screen->fence_reference(screen, &so->fence, NULL);
118 mtx_unlock(&so->mutex);
119 so->b.StatusFlag = GL_TRUE;
120 }
121 screen->fence_reference(screen, &fence, NULL);
122 }
123
st_check_sync(struct gl_context * ctx,struct gl_sync_object * obj)124 static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
125 {
126 st_client_wait_sync(ctx, obj, 0, 0);
127 }
128
st_server_wait_sync(struct gl_context * ctx,struct gl_sync_object * obj,GLbitfield flags,GLuint64 timeout)129 static void st_server_wait_sync(struct gl_context *ctx,
130 struct gl_sync_object *obj,
131 GLbitfield flags, GLuint64 timeout)
132 {
133 struct pipe_context *pipe = st_context(ctx)->pipe;
134 struct pipe_screen *screen = pipe->screen;
135 struct st_sync_object *so = (struct st_sync_object*)obj;
136 struct pipe_fence_handle *fence = NULL;
137
138 /* Nothing needs to be done here if the driver does not support async
139 * flushes. */
140 if (!pipe->fence_server_sync)
141 return;
142
143 /* If the fence doesn't exist, assume it's signalled. */
144 mtx_lock(&so->mutex);
145 if (!so->fence) {
146 mtx_unlock(&so->mutex);
147 so->b.StatusFlag = GL_TRUE;
148 return;
149 }
150
151 /* We need a local copy of the fence pointer. */
152 screen->fence_reference(screen, &fence, so->fence);
153 mtx_unlock(&so->mutex);
154
155 pipe->fence_server_sync(pipe, fence);
156 screen->fence_reference(screen, &fence, NULL);
157 }
158
st_init_syncobj_functions(struct dd_function_table * functions)159 void st_init_syncobj_functions(struct dd_function_table *functions)
160 {
161 functions->NewSyncObject = st_new_sync_object;
162 functions->FenceSync = st_fence_sync;
163 functions->DeleteSyncObject = st_delete_sync_object;
164 functions->CheckSync = st_check_sync;
165 functions->ClientWaitSync = st_client_wait_sync;
166 functions->ServerWaitSync = st_server_wait_sync;
167 }
168