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 <libsync.h>
  30
  31 #include "util/u_inlines.h"
  32
  33 #include "freedreno_fence.h"
  34 #include "freedreno_context.h"
  35 #include "freedreno_util.h"
  36
  37 struct pipe_fence_handle {
  38         struct pipe_reference reference;
  39         /* fence holds a weak reference to the batch until the batch is flushed,
  40          * at which point fd_fence_populate() is called and timestamp and possibly
  41          * fence_fd become valid and the week reference is dropped.
  42          */
  43         struct fd_batch *batch;
  44         struct fd_context *ctx;
  45         struct fd_screen *screen;
  46         int fence_fd;
  47         uint32_t timestamp;
  48 };
  49
  50 static void fence_flush(struct pipe_fence_handle *fence)
  51 {
  52         if (fence->batch)
  53                 fd_batch_flush(fence->batch, true, true);
  54         debug_assert(!fence->batch);
  55 }
  56
  57 void fd_fence_populate(struct pipe_fence_handle *fence,
  58                 uint32_t timestamp, int fence_fd)
  59 {
  60         if (!fence->batch)
  61                 return;
  62         fence->timestamp = timestamp;
  63         fence->fence_fd = fence_fd;
  64         fence->batch = NULL;
  65 }
  66
  67 static void fd_fence_destroy(struct pipe_fence_handle *fence)
  68 {
  69         if (fence->fence_fd != -1)
  70                 close(fence->fence_fd);
  71         FREE(fence);
  72 }
  73
  74 void fd_fence_ref(struct pipe_screen *pscreen,
  75                 struct pipe_fence_handle **ptr,
  76                 struct pipe_fence_handle *pfence)
  77 {
  78         if (pipe_reference(&(*ptr)->reference, &pfence->reference))
  79                 fd_fence_destroy(*ptr);
  80
  81         *ptr = pfence;
  82 }
  83
  84 boolean fd_fence_finish(struct pipe_screen *pscreen,
  85                 struct pipe_context *ctx,
  86                 struct pipe_fence_handle *fence,
  87                 uint64_t timeout)
  88 {
  89         fence_flush(fence);
  90
  91         if (fence->fence_fd != -1) {
  92                 int ret = sync_wait(fence->fence_fd, timeout / 1000000);
  93                 return ret == 0;
  94         }
  95
  96         if (fd_pipe_wait_timeout(fence->ctx->pipe, fence->timestamp, timeout))
  97                 return false;
  98
  99         return true;
 100 }
 101
 102 static struct pipe_fence_handle * fence_create(struct fd_context *ctx,
 103                 struct fd_batch *batch, uint32_t timestamp, int fence_fd)
 104 {
 105         struct pipe_fence_handle *fence;
 106
 107         fence = CALLOC_STRUCT(pipe_fence_handle);
 108         if (!fence)
 109                 return NULL;
 110
 111         pipe_reference_init(&fence->reference, 1);
 112
 113         fence->batch = batch;
 114         fence->ctx = ctx;
 115         fence->screen = ctx->screen;
 116         fence->timestamp = timestamp;
 117         fence->fence_fd = fence_fd;
 118
 119         return fence;
 120 }
 121
 122 void fd_create_fence_fd(struct pipe_context *pctx,
 123                 struct pipe_fence_handle **pfence, int fd)
 124 {
 125         *pfence = fence_create(fd_context(pctx), NULL, 0, dup(fd));
 126 }
 127
 128 void fd_fence_server_sync(struct pipe_context *pctx,
 129                 struct pipe_fence_handle *fence)
 130 {
 131         struct fd_context *ctx = fd_context(pctx);
 132         struct fd_batch *batch = ctx->batch;
 133
 134         fence_flush(fence);
 135
 136         if (sync_accumulate("freedreno", &batch->in_fence_fd, fence->fence_fd)) {
 137                 /* error */
 138         }
 139 }
 140
 141 int fd_fence_get_fd(struct pipe_screen *pscreen,
 142                 struct pipe_fence_handle *fence)
 143 {
 144         fence_flush(fence);
 145         return dup(fence->fence_fd);
 146 }
 147
 148 struct pipe_fence_handle * fd_fence_create(struct fd_batch *batch)
 149 {
 150         return fence_create(batch->ctx, batch, 0, -1);
 151 }