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 "intel_gem.h"
24#include "drm-uapi/i915_drm.h"
25
26bool
27intel_gem_supports_syncobj_wait(int fd)
28{
29   int ret;
30
31   struct drm_syncobj_create create = {
32      .flags = 0,
33   };
34   ret = intel_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 = intel_ioctl(fd, DRM_IOCTL_SYNCOBJ_WAIT, &wait);
47
48   struct drm_syncobj_destroy destroy = {
49      .handle = syncobj,
50   };
51   intel_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}
58