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/os_file.h"
  29 #include <util/u_memory.h>
  30 #include <util/u_inlines.h>
  31
  32 #include "drm-uapi/lima_drm.h"
  33
  34 #include "lima_screen.h"
  35 #include "lima_context.h"
  36 #include "lima_fence.h"
  37 #include "lima_job.h"
  38
  39 struct pipe_fence_handle {
  40    struct pipe_reference reference;
  41    int fd;
  42 };
  43
  44 static void
  45 lima_create_fence_fd(struct pipe_context *pctx,
  46                      struct pipe_fence_handle **fence,
  47                      int fd, enum pipe_fd_type type)
  48 {
  49    assert(type == PIPE_FD_TYPE_NATIVE_SYNC);
  50    *fence = lima_fence_create(os_dupfd_cloexec(fd));
  51 }
  52
  53 static void
  54 lima_fence_server_sync(struct pipe_context *pctx,
  55                        struct pipe_fence_handle *fence)
  56 {
  57    struct lima_context *ctx = lima_context(pctx);
  58
  59    sync_accumulate("lima", &ctx->in_sync_fd, fence->fd);
  60 }
  61
  62 void lima_fence_context_init(struct lima_context *ctx)
  63 {
  64    ctx->base.create_fence_fd = lima_create_fence_fd;
  65    ctx->base.fence_server_sync = lima_fence_server_sync;
  66 }
  67
  68 struct pipe_fence_handle *
  69 lima_fence_create(int fd)
  70 {
  71    struct pipe_fence_handle *fence;
  72
  73    fence = CALLOC_STRUCT(pipe_fence_handle);
  74    if (!fence)
  75       return NULL;
  76
  77    pipe_reference_init(&fence->reference, 1);
  78    fence->fd = fd;
  79
  80    return fence;
  81 }
  82
  83 static int
  84 lima_fence_get_fd(struct pipe_screen *pscreen,
  85                   struct pipe_fence_handle *fence)
  86 {
  87    return os_dupfd_cloexec(fence->fd);
  88 }
  89
  90 static void
  91 lima_fence_destroy(struct pipe_fence_handle *fence)
  92 {
  93    if (fence->fd >= 0)
  94       close(fence->fd);
  95    FREE(fence);
  96 }
  97
  98 static void
  99 lima_fence_reference(struct pipe_screen *pscreen,
 100                      struct pipe_fence_handle **ptr,
 101                      struct pipe_fence_handle *fence)
 102 {
 103    if (pipe_reference(&(*ptr)->reference, &fence->reference))
 104       lima_fence_destroy(*ptr);
 105    *ptr = fence;
 106 }
 107
 108 static bool
 109 lima_fence_finish(struct pipe_screen *pscreen, struct pipe_context *pctx,
 110                   struct pipe_fence_handle *fence, uint64_t timeout)
 111 {
 112    return !sync_wait(fence->fd, timeout / 1000000);
 113 }
 114
 115 void
 116 lima_fence_screen_init(struct lima_screen *screen)
 117 {
 118    screen->base.fence_reference = lima_fence_reference;
 119    screen->base.fence_finish = lima_fence_finish;
 120    screen->base.fence_get_fd = lima_fence_get_fd;
 121 }