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
40struct st_sync_object {
41   struct gl_sync_object b;
42
43   struct pipe_fence_handle *fence;
44};
45
46
47static struct gl_sync_object * st_new_sync_object(struct gl_context *ctx,
48                                                  GLenum type)
49{
50   if (type == GL_SYNC_FENCE)
51      return (struct gl_sync_object*)CALLOC_STRUCT(st_sync_object);
52   else
53      return NULL;
54}
55
56static 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   FREE(so);
64}
65
66static void st_fence_sync(struct gl_context *ctx, struct gl_sync_object *obj,
67                          GLenum condition, GLbitfield flags)
68{
69   struct pipe_context *pipe = st_context(ctx)->pipe;
70   struct st_sync_object *so = (struct st_sync_object*)obj;
71
72   assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE && flags == 0);
73   assert(so->fence == NULL);
74
75   pipe->flush(pipe, &so->fence);
76}
77
78static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
79{
80   struct pipe_screen *screen = st_context(ctx)->pipe->screen;
81   struct st_sync_object *so = (struct st_sync_object*)obj;
82
83   if (so->fence && screen->fence_signalled(screen, so->fence)) {
84      screen->fence_reference(screen, &so->fence, NULL);
85      so->b.StatusFlag = GL_TRUE;
86   }
87}
88
89static void st_client_wait_sync(struct gl_context *ctx,
90                                struct gl_sync_object *obj,
91                                GLbitfield flags, GLuint64 timeout)
92{
93   struct pipe_screen *screen = st_context(ctx)->pipe->screen;
94   struct st_sync_object *so = (struct st_sync_object*)obj;
95
96   /* We don't care about GL_SYNC_FLUSH_COMMANDS_BIT, because flush is
97    * already called when creating a fence. */
98
99   if (so->fence &&
100       screen->fence_finish(screen, so->fence, timeout)) {
101      screen->fence_reference(screen, &so->fence, NULL);
102      so->b.StatusFlag = GL_TRUE;
103   }
104}
105
106static void st_server_wait_sync(struct gl_context *ctx,
107                                struct gl_sync_object *obj,
108                                GLbitfield flags, GLuint64 timeout)
109{
110   /* NO-OP.
111    * Neither Gallium nor DRM interfaces support blocking on the GPU. */
112}
113
114void st_init_syncobj_functions(struct dd_function_table *functions)
115{
116   functions->NewSyncObject = st_new_sync_object;
117   functions->FenceSync = st_fence_sync;
118   functions->DeleteSyncObject = st_delete_sync_object;
119   functions->CheckSync = st_check_sync;
120   functions->ClientWaitSync = st_client_wait_sync;
121   functions->ServerWaitSync = st_server_wait_sync;
122}
123