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  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. };
  45.  
  46.  
  47. static 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.  
  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.    free(so->b.Label);
  64.    free(so);
  65. }
  66.  
  67. static void st_fence_sync(struct gl_context *ctx, struct gl_sync_object *obj,
  68.                           GLenum condition, GLbitfield flags)
  69. {
  70.    struct pipe_context *pipe = st_context(ctx)->pipe;
  71.    struct st_sync_object *so = (struct st_sync_object*)obj;
  72.  
  73.    assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE && flags == 0);
  74.    assert(so->fence == NULL);
  75.  
  76.    pipe->flush(pipe, &so->fence, 0);
  77. }
  78.  
  79. static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
  80. {
  81.    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
  82.    struct st_sync_object *so = (struct st_sync_object*)obj;
  83.  
  84.    if (so->fence && screen->fence_signalled(screen, so->fence)) {
  85.       screen->fence_reference(screen, &so->fence, NULL);
  86.       so->b.StatusFlag = GL_TRUE;
  87.    }
  88. }
  89.  
  90. static void st_client_wait_sync(struct gl_context *ctx,
  91.                                 struct gl_sync_object *obj,
  92.                                 GLbitfield flags, GLuint64 timeout)
  93. {
  94.    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
  95.    struct st_sync_object *so = (struct st_sync_object*)obj;
  96.  
  97.    /* We don't care about GL_SYNC_FLUSH_COMMANDS_BIT, because flush is
  98.     * already called when creating a fence. */
  99.  
  100.    if (so->fence &&
  101.        screen->fence_finish(screen, so->fence, timeout)) {
  102.       screen->fence_reference(screen, &so->fence, NULL);
  103.       so->b.StatusFlag = GL_TRUE;
  104.    }
  105. }
  106.  
  107. static void st_server_wait_sync(struct gl_context *ctx,
  108.                                 struct gl_sync_object *obj,
  109.                                 GLbitfield flags, GLuint64 timeout)
  110. {
  111.    /* NO-OP.
  112.     * Neither Gallium nor DRM interfaces support blocking on the GPU. */
  113. }
  114.  
  115. void st_init_syncobj_functions(struct dd_function_table *functions)
  116. {
  117.    functions->NewSyncObject = st_new_sync_object;
  118.    functions->FenceSync = st_fence_sync;
  119.    functions->DeleteSyncObject = st_delete_sync_object;
  120.    functions->CheckSync = st_check_sync;
  121.    functions->ClientWaitSync = st_client_wait_sync;
  122.    functions->ServerWaitSync = st_server_wait_sync;
  123. }
  124.