src/gallium/drivers/lima/lima_fence.c

   1 /*
   2  * Copyright (c) 2018-2019 Lima Project
   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, sub license,
   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
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the 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 NON-INFRINGEMENT. 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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <fcntl.h>
  26 #include <libsync.h>
  27
  28 #include <util/u_memory.h>
  29 #include <util/u_inlines.h>
  30
  31 #include "drm-uapi/lima_drm.h"
  32
  33 #include "lima_screen.h"
  34 #include "lima_context.h"
  35 #include "lima_fence.h"
  36 #include "lima_job.h"
  37
  38 struct pipe_fence_handle {
  39    struct pipe_reference reference;
  40    int fd;
  41 };
  42
  43 static void
  44 lima_create_fence_fd(struct pipe_context *pctx,
  45                      struct pipe_fence_handle **fence,
  46                      int fd, enum pipe_fd_type type)
  47 {
  48    assert(type == PIPE_FD_TYPE_NATIVE_SYNC);
  49    *fence = lima_fence_create(fcntl(fd, F_DUPFD_CLOEXEC, 3));
  50 }
  51
  52 static void
  53 lima_fence_server_sync(struct pipe_context *pctx,
  54                        struct pipe_fence_handle *fence)
  55 {
  56    struct lima_context *ctx = lima_context(pctx);
  57
  58    sync_accumulate("lima", &ctx->in_sync_fd, fence->fd);
  59 }
  60
  61 void lima_fence_context_init(struct lima_context *ctx)
  62 {
  63    ctx->base.create_fence_fd = lima_create_fence_fd;
  64    ctx->base.fence_server_sync = lima_fence_server_sync;
  65 }
  66
  67 struct pipe_fence_handle *
  68 lima_fence_create(int fd)
  69 {
  70    struct pipe_fence_handle *fence;
  71
  72    fence = CALLOC_STRUCT(pipe_fence_handle);
  73    if (!fence)
  74       return NULL;
  75
  76    pipe_reference_init(&fence->reference, 1);
  77    fence->fd = fd;
  78
  79    return fence;
  80 }
  81
  82 static int
  83 lima_fence_get_fd(struct pipe_screen *pscreen,
  84                   struct pipe_fence_handle *fence)
  85 {
  86    return fcntl(fence->fd, F_DUPFD_CLOEXEC, 3);
  87 }
  88
  89 static void
  90 lima_fence_destroy(struct pipe_fence_handle *fence)
  91 {
  92    if (fence->fd >= 0)
  93       close(fence->fd);
  94    FREE(fence);
  95 }
  96
  97 static void
  98 lima_fence_reference(struct pipe_screen *pscreen,
  99                      struct pipe_fence_handle **ptr,
 100                      struct pipe_fence_handle *fence)
 101 {
 102    if (pipe_reference(&(*ptr)->reference, &fence->reference))
 103       lima_fence_destroy(*ptr);
 104    *ptr = fence;
 105 }
 106
 107 static bool
 108 lima_fence_finish(struct pipe_screen *pscreen, struct pipe_context *pctx,
 109                   struct pipe_fence_handle *fence, uint64_t timeout)
 110 {
 111    return !sync_wait(fence->fd, timeout / 1000000);
 112 }
 113
 114 void
 115 lima_fence_screen_init(struct lima_screen *screen)
 116 {
 117    screen->base.fence_reference = lima_fence_reference;
 118    screen->base.fence_finish = lima_fence_finish;
 119    screen->base.fence_get_fd = lima_fence_get_fd;
 120 }