tegra/syncpt.c

   1 /*
   2  * Copyright © 2021 NVIDIA Corporation
   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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #  include "config.h"
  25 #endif
  26
  27 #include <errno.h>
  28 #include <string.h>
  29
  30 #include <sys/ioctl.h>
  31
  32 #include "private.h"
  33
  34 drm_public int
  35 drm_tegra_syncpoint_new(struct drm_tegra *drm,
  36                         struct drm_tegra_syncpoint **syncptp)
  37 {
  38     struct drm_tegra_syncpoint_allocate args;
  39     struct drm_tegra_syncpoint *syncpt;
  40     int err;
  41
  42     syncpt = calloc(1, sizeof(*syncpt));
  43     if (!syncpt)
  44         return -ENOMEM;
  45
  46     memset(&args, 0, sizeof(args));
  47
  48     err = ioctl(drm->fd, DRM_IOCTL_TEGRA_SYNCPOINT_ALLOCATE, &args);
  49     if (err < 0) {
  50         free(syncpt);
  51         return -errno;
  52     }
  53
  54     syncpt->drm = drm;
  55     syncpt->id = args.id;
  56
  57     *syncptp = syncpt;
  58
  59     return 0;
  60 }
  61
  62 drm_public int
  63 drm_tegra_syncpoint_free(struct drm_tegra_syncpoint *syncpt)
  64 {
  65     struct drm_tegra_syncpoint_free args;
  66     struct drm_tegra *drm = syncpt->drm;
  67     int err;
  68
  69     if (!syncpt)
  70         return -EINVAL;
  71
  72     memset(&args, 0, sizeof(args));
  73     args.id = syncpt->id;
  74
  75     err = ioctl(drm->fd, DRM_IOCTL_TEGRA_SYNCPOINT_FREE, &args);
  76     if (err < 0)
  77         return -errno;
  78
  79     free(syncpt);
  80
  81     return 0;
  82 }
  83
  84 drm_public int
  85 drm_tegra_fence_wait(struct drm_tegra_fence *fence, unsigned long timeout)
  86 {
  87     struct drm_tegra_syncpoint_wait args;
  88     struct drm_tegra *drm = fence->drm;
  89     int err;
  90
  91     memset(&args, 0, sizeof(args));
  92     args.timeout_ns = 0;
  93     args.id = fence->syncpt;
  94     args.threshold = fence->value;
  95
  96     err = ioctl(drm->fd, DRM_IOCTL_TEGRA_SYNCPOINT_WAIT, &args);
  97     if (err < 0)
  98         return -errno;
  99
 100     return 0;
 101 }