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/os_file.h"
  30 #include "util/u_inlines.h"
  31
  32 #include "freedreno_fence.h"
  33 #include "freedreno_context.h"
  34 #include "freedreno_util.h"
  35
  36 struct pipe_fence_handle {
  37         struct pipe_reference reference;
  38         /* fence holds a weak reference to the batch until the batch is flushed,
  39          * at which point fd_fence_populate() is called and timestamp and possibly
  40          * fence_fd become valid and the week reference is dropped.
  41          */
  42         struct fd_batch *batch;
  43         struct fd_pipe *pipe;
  44         struct fd_screen *screen;
  45         int fence_fd;
  46         uint32_t timestamp;
  47 };
  48
  49 static void fence_flush(struct pipe_fence_handle *fence)
  50 {
  51         if (fence->batch)
  52                 fd_batch_flush(fence->batch);
  53         debug_assert(!fence->batch);
  54 }
  55
  56 void fd_fence_populate(struct pipe_fence_handle *fence,
  57                 uint32_t timestamp, int fence_fd)
  58 {
  59         if (!fence->batch)
  60                 return;
  61         fence->timestamp = timestamp;
  62         fence->fence_fd = fence_fd;
  63         fence->batch = NULL;
  64 }
  65
  66 static void fd_fence_destroy(struct pipe_fence_handle *fence)
  67 {
  68         if (fence->fence_fd != -1)
  69                 close(fence->fence_fd);
  70         fd_pipe_del(fence->pipe);
  71         FREE(fence);
  72 }
  73
  74 void fd_fence_ref(struct pipe_fence_handle **ptr,
  75                 struct pipe_fence_handle *pfence)
  76 {
  77         if (pipe_reference(&(*ptr)->reference, &pfence->reference))
  78                 fd_fence_destroy(*ptr);
  79
  80         *ptr = pfence;
  81 }
  82
  83 bool fd_fence_finish(struct pipe_screen *pscreen,
  84                 struct pipe_context *ctx,
  85                 struct pipe_fence_handle *fence,
  86                 uint64_t timeout)
  87 {
  88         fence_flush(fence);
  89
  90         if (fence->fence_fd != -1) {
  91                 int ret = sync_wait(fence->fence_fd, timeout / 1000000);
  92                 return ret == 0;
  93         }
  94
  95         if (fd_pipe_wait_timeout(fence->pipe, fence->timestamp, timeout))
  96                 return false;
  97
  98         return true;
  99 }
 100
 101 static struct pipe_fence_handle * fence_create(struct fd_context *ctx,
 102                 struct fd_batch *batch, uint32_t timestamp, int fence_fd)
 103 {
 104         struct pipe_fence_handle *fence;
 105
 106         fence = CALLOC_STRUCT(pipe_fence_handle);
 107         if (!fence)
 108                 return NULL;
 109
 110         pipe_reference_init(&fence->reference, 1);
 111
 112         fence->batch = batch;
 113         fence->pipe = fd_pipe_ref(ctx->pipe);
 114         fence->screen = ctx->screen;
 115         fence->timestamp = timestamp;
 116         fence->fence_fd = fence_fd;
 117
 118         return fence;
 119 }
 120
 121 void fd_create_fence_fd(struct pipe_context *pctx,
 122                 struct pipe_fence_handle **pfence, int fd,
 123                 enum pipe_fd_type type)
 124 {
 125         assert(type == PIPE_FD_TYPE_NATIVE_SYNC);
 126         *pfence = fence_create(fd_context(pctx), NULL, 0, os_dupfd_cloexec(fd));
 127 }
 128
 129 void fd_fence_server_sync(struct pipe_context *pctx,
 130                 struct pipe_fence_handle *fence)
 131 {
 132         struct fd_context *ctx = fd_context(pctx);
 133         struct fd_batch *batch = fd_context_batch(ctx);
 134
 135         fence_flush(fence);
 136
 137         /* if not an external fence, then nothing more to do without preemption: */
 138         if (fence->fence_fd == -1)
 139                 return;
 140
 141         if (sync_accumulate("freedreno", &batch->in_fence_fd, fence->fence_fd)) {
 142                 /* error */
 143         }
 144 }
 145
 146 int fd_fence_get_fd(struct pipe_screen *pscreen,
 147                 struct pipe_fence_handle *fence)
 148 {
 149         fence_flush(fence);
 150         return os_dupfd_cloexec(fence->fence_fd);
 151 }
 152
 153 struct pipe_fence_handle * fd_fence_create(struct fd_batch *batch)
 154 {
 155         return fence_create(batch->ctx, batch, 0, -1);
 156 }