src/gallium/drivers/freedreno/freedreno_fence.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "util/u_inlines.h"
  30
  31 #include "freedreno_fence.h"
  32 #include "freedreno_context.h"
  33 #include "freedreno_util.h"
  34
  35 struct pipe_fence_handle {
  36         struct pipe_reference reference;
  37         struct fd_context *ctx;
  38         struct fd_screen *screen;
  39         uint32_t timestamp;
  40 };
  41
  42 void
  43 fd_screen_fence_ref(struct pipe_screen *pscreen,
  44                 struct pipe_fence_handle **ptr,
  45                 struct pipe_fence_handle *pfence)
  46 {
  47         if (pipe_reference(&(*ptr)->reference, &pfence->reference))
  48                 FREE(*ptr);
  49
  50         *ptr = pfence;
  51 }
  52
  53 /* TODO we need to spiff out libdrm_freedreno a bit to allow passing
  54  * the timeout.. and maybe a better way to check if fence has been
  55  * signaled.  The current implementation is a bit lame for now to
  56  * avoid bumping libdrm version requirement.
  57  */
  58
  59 boolean fd_screen_fence_signalled(struct pipe_screen *screen,
  60                 struct pipe_fence_handle *fence)
  61 {
  62         uint32_t timestamp = fd_ringbuffer_timestamp(fence->ctx->ring);
  63
  64         /* TODO util helper for compare w/ rollover? */
  65         return timestamp >= fence->timestamp;
  66 }
  67
  68 boolean fd_screen_fence_finish(struct pipe_screen *screen,
  69                 struct pipe_fence_handle *fence,
  70                 uint64_t timeout)
  71 {
  72         if (fd_pipe_wait(fence->screen->pipe, fence->timestamp))
  73                 return false;
  74
  75         return true;
  76 }
  77
  78 struct pipe_fence_handle * fd_fence_create(struct pipe_context *pctx)
  79 {
  80         struct pipe_fence_handle *fence;
  81         struct fd_context *ctx = fd_context(pctx);
  82
  83         fence = CALLOC_STRUCT(pipe_fence_handle);
  84         if (!fence)
  85                 return NULL;
  86
  87         pipe_reference_init(&fence->reference, 1);
  88
  89         fence->ctx = ctx;
  90         fence->screen = ctx->screen;
  91         fence->timestamp = fd_ringbuffer_timestamp(ctx->ring);
  92
  93         return fence;
  94 }