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      1 /**************************************************************************
      2  *
      3  * Copyright 2011 Marek Olk <maraeo (at) 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 Olk <maraeo (at) 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);
     64 }
     65 
     66 static 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 
     78 static 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 
     89 static 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 
    106 static 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 
    114 void 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