src/gallium/drivers/freedreno/freedreno_fence.c

   1 /*
   2  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rob Clark <robclark@freedesktop.org>
  25  */
  26
  27 #include <libsync.h>
  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         /* fence holds a weak reference to the batch until the batch is flushed,
  38          * at which point fd_fence_populate() is called and timestamp and possibly
  39          * fence_fd become valid and the week reference is dropped.
  40          */
  41         struct fd_batch *batch;
  42         struct fd_pipe *pipe;
  43         struct fd_screen *screen;
  44         int fence_fd;
  45         uint32_t timestamp;
  46 };
  47
  48 static void fence_flush(struct pipe_fence_handle *fence)
  49 {
  50         if (fence->batch)
  51                 fd_batch_flush(fence->batch, true);
  52         debug_assert(!fence->batch);
  53 }
  54
  55 void fd_fence_populate(struct pipe_fence_handle *fence,
  56                 uint32_t timestamp, int fence_fd)
  57 {
  58         if (!fence->batch)
  59                 return;
  60         fence->timestamp = timestamp;
  61         fence->fence_fd = fence_fd;
  62         fence->batch = NULL;
  63 }
  64
  65 static void fd_fence_destroy(struct pipe_fence_handle *fence)
  66 {
  67         if (fence->fence_fd != -1)
  68                 close(fence->fence_fd);
  69         fd_pipe_del(fence->pipe);
  70         FREE(fence);
  71 }
  72
  73 void fd_fence_ref(struct pipe_fence_handle **ptr,
  74                 struct pipe_fence_handle *pfence)
  75 {
  76         if (pipe_reference(&(*ptr)->reference, &pfence->reference))
  77                 fd_fence_destroy(*ptr);
  78
  79         *ptr = pfence;
  80 }
  81
  82 bool fd_fence_finish(struct pipe_screen *pscreen,
  83                 struct pipe_context *ctx,
  84                 struct pipe_fence_handle *fence,
  85                 uint64_t timeout)
  86 {
  87         fence_flush(fence);
  88
  89         if (fence->fence_fd != -1) {
  90                 int ret = sync_wait(fence->fence_fd, timeout / 1000000);
  91                 return ret == 0;
  92         }
  93
  94         if (fd_pipe_wait_timeout(fence->pipe, fence->timestamp, timeout))
  95                 return false;
  96
  97         return true;
  98 }
  99
 100 static struct pipe_fence_handle * fence_create(struct fd_context *ctx,
 101                 struct fd_batch *batch, uint32_t timestamp, int fence_fd)
 102 {
 103         struct pipe_fence_handle *fence;
 104
 105         fence = CALLOC_STRUCT(pipe_fence_handle);
 106         if (!fence)
 107                 return NULL;
 108
 109         pipe_reference_init(&fence->reference, 1);
 110
 111         fence->batch = batch;
 112         fence->pipe = fd_pipe_ref(ctx->pipe);
 113         fence->screen = ctx->screen;
 114         fence->timestamp = timestamp;
 115         fence->fence_fd = fence_fd;
 116
 117         return fence;
 118 }
 119
 120 void fd_create_fence_fd(struct pipe_context *pctx,
 121                 struct pipe_fence_handle **pfence, int fd,
 122                 enum pipe_fd_type type)
 123 {
 124         assert(type == PIPE_FD_TYPE_NATIVE_SYNC);
 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 = fd_context_batch(ctx);
 133
 134         fence_flush(fence);
 135
 136         /* if not an external fence, then nothing more to do without preemption: */
 137         if (fence->fence_fd == -1)
 138                 return;
 139
 140         if (sync_accumulate("freedreno", &batch->in_fence_fd, fence->fence_fd)) {
 141                 /* error */
 142         }
 143 }
 144
 145 int fd_fence_get_fd(struct pipe_screen *pscreen,
 146                 struct pipe_fence_handle *fence)
 147 {
 148         fence_flush(fence);
 149         return dup(fence->fence_fd);
 150 }
 151
 152 struct pipe_fence_handle * fd_fence_create(struct fd_batch *batch)
 153 {
 154         return fence_create(batch->ctx, batch, 0, -1);
 155 }