src/intel/common/gen_gem.c

   1 /*
   2  * Copyright © 2020 Intel 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
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include "gen_gem.h"
  24 #include "drm-uapi/i915_drm.h"
  25
  26 bool
  27 gen_gem_supports_syncobj_wait(int fd)
  28 {
  29    int ret;
  30
  31    struct drm_syncobj_create create = {
  32       .flags = 0,
  33    };
  34    ret = gen_ioctl(fd, DRM_IOCTL_SYNCOBJ_CREATE, &create);
  35    if (ret)
  36       return false;
  37
  38    uint32_t syncobj = create.handle;
  39
  40    struct drm_syncobj_wait wait = {
  41       .handles = (uint64_t)(uintptr_t)&create,
  42       .count_handles = 1,
  43       .timeout_nsec = 0,
  44       .flags = DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT,
  45    };
  46    ret = gen_ioctl(fd, DRM_IOCTL_SYNCOBJ_WAIT, &wait);
  47
  48    struct drm_syncobj_destroy destroy = {
  49       .handle = syncobj,
  50    };
  51    gen_ioctl(fd, DRM_IOCTL_SYNCOBJ_DESTROY, &destroy);
  52
  53    /* If it timed out, then we have the ioctl and it supports the
  54     * DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT flag.
  55     */
  56    return ret == -1 && errno == ETIME;
  57 }