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 "util/u_memory.h"
38 #include "st_context.h"
39 #include "st_cb_syncobj.h"
40
41 struct st_sync_object {
42 struct gl_sync_object b;
43
44 struct pipe_fence_handle *fence;
45 simple_mtx_t mutex; /**< protects "fence" */
46 };
47
48
st_new_sync_object(struct gl_context * ctx)49 static struct gl_sync_object *st_new_sync_object(struct gl_context *ctx)
50 {
51 struct st_sync_object *so = CALLOC_STRUCT(st_sync_object);
52
53 simple_mtx_init(&so->mutex, mtx_plain);
54 return &so->b;
55 }
56
st_delete_sync_object(struct gl_context * ctx,struct gl_sync_object * obj)57 static void st_delete_sync_object(struct gl_context *ctx,
58 struct gl_sync_object *obj)
59 {
60 struct pipe_screen *screen = st_context(ctx)->pipe->screen;
61 struct st_sync_object *so = (struct st_sync_object*)obj;
62
63 screen->fence_reference(screen, &so->fence, NULL);
64 simple_mtx_destroy(&so->mutex);
65 free(so->b.Label);
66 free(so);
67 }
68
st_fence_sync(struct gl_context * ctx,struct gl_sync_object * obj,GLenum condition,GLbitfield flags)69 static void st_fence_sync(struct gl_context *ctx, struct gl_sync_object *obj,
70 GLenum condition, GLbitfield flags)
71 {
72 struct pipe_context *pipe = st_context(ctx)->pipe;
73 struct st_sync_object *so = (struct st_sync_object*)obj;
74
75 assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE && flags == 0);
76 assert(so->fence == NULL);
77
78 /* Deferred flush are only allowed when there's a single context. See issue 1430 */
79 pipe->flush(pipe, &so->fence, ctx->Shared->RefCount == 1 ? PIPE_FLUSH_DEFERRED : 0);
80 }
81
st_client_wait_sync(struct gl_context * ctx,struct gl_sync_object * obj,GLbitfield flags,GLuint64 timeout)82 static void st_client_wait_sync(struct gl_context *ctx,
83 struct gl_sync_object *obj,
84 GLbitfield flags, GLuint64 timeout)
85 {
86 struct pipe_context *pipe = st_context(ctx)->pipe;
87 struct pipe_screen *screen = pipe->screen;
88 struct st_sync_object *so = (struct st_sync_object*)obj;
89 struct pipe_fence_handle *fence = NULL;
90
91 /* If the fence doesn't exist, assume it's signalled. */
92 simple_mtx_lock(&so->mutex);
93 if (!so->fence) {
94 simple_mtx_unlock(&so->mutex);
95 so->b.StatusFlag = GL_TRUE;
96 return;
97 }
98
99 /* We need a local copy of the fence pointer, so that we can call
100 * fence_finish unlocked.
101 */
102 screen->fence_reference(screen, &fence, so->fence);
103 simple_mtx_unlock(&so->mutex);
104
105 /* Section 4.1.2 of OpenGL 4.5 (Compatibility Profile) says:
106 * [...] if ClientWaitSync is called and all of the following are true:
107 * - the SYNC_FLUSH_COMMANDS_BIT bit is set in flags,
108 * - sync is unsignaled when ClientWaitSync is called,
109 * - and the calls to ClientWaitSync and FenceSync were issued from
110 * the same context,
111 * then the GL will behave as if the equivalent of Flush were inserted
112 * immediately after the creation of sync.
113 *
114 * Assume GL_SYNC_FLUSH_COMMANDS_BIT is always set, because applications
115 * forget to set it.
116 */
117 if (screen->fence_finish(screen, pipe, fence, timeout)) {
118 simple_mtx_lock(&so->mutex);
119 screen->fence_reference(screen, &so->fence, NULL);
120 simple_mtx_unlock(&so->mutex);
121 so->b.StatusFlag = GL_TRUE;
122 }
123 screen->fence_reference(screen, &fence, NULL);
124 }
125
st_check_sync(struct gl_context * ctx,struct gl_sync_object * obj)126 static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
127 {
128 st_client_wait_sync(ctx, obj, 0, 0);
129 }
130
st_server_wait_sync(struct gl_context * ctx,struct gl_sync_object * obj,GLbitfield flags,GLuint64 timeout)131 static void st_server_wait_sync(struct gl_context *ctx,
132 struct gl_sync_object *obj,
133 GLbitfield flags, GLuint64 timeout)
134 {
135 struct pipe_context *pipe = st_context(ctx)->pipe;
136 struct pipe_screen *screen = pipe->screen;
137 struct st_sync_object *so = (struct st_sync_object*)obj;
138 struct pipe_fence_handle *fence = NULL;
139
140 /* Nothing needs to be done here if the driver does not support async
141 * flushes. */
142 if (!pipe->fence_server_sync)
143 return;
144
145 /* If the fence doesn't exist, assume it's signalled. */
146 simple_mtx_lock(&so->mutex);
147 if (!so->fence) {
148 simple_mtx_unlock(&so->mutex);
149 so->b.StatusFlag = GL_TRUE;
150 return;
151 }
152
153 /* We need a local copy of the fence pointer. */
154 screen->fence_reference(screen, &fence, so->fence);
155 simple_mtx_unlock(&so->mutex);
156
157 pipe->fence_server_sync(pipe, fence);
158 screen->fence_reference(screen, &fence, NULL);
159 }
160
st_init_syncobj_functions(struct dd_function_table * functions)161 void st_init_syncobj_functions(struct dd_function_table *functions)
162 {
163 functions->NewSyncObject = st_new_sync_object;
164 functions->FenceSync = st_fence_sync;
165 functions->DeleteSyncObject = st_delete_sync_object;
166 functions->CheckSync = st_check_sync;
167 functions->ClientWaitSync = st_client_wait_sync;
168 functions->ServerWaitSync = st_server_wait_sync;
169 }
170