1 /*
2 * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * 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 NONINFRINGEMENT. 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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robclark@freedesktop.org>
25 */
26
27 #include <unistd.h>
28 #include <sys/stat.h>
29 #include <sys/types.h>
30
31 #include "msm_priv.h"
32
33 static void
msm_device_destroy(struct fd_device * dev)34 msm_device_destroy(struct fd_device *dev)
35 {
36 }
37
38 static const struct fd_device_funcs funcs = {
39 .bo_new = msm_bo_new,
40 .bo_from_handle = msm_bo_from_handle,
41 .handle_from_dmabuf = fd_handle_from_dmabuf_drm,
42 .bo_from_dmabuf = fd_bo_from_dmabuf_drm,
43 .bo_close_handle = fd_bo_close_handle_drm,
44 .pipe_new = msm_pipe_new,
45 .destroy = msm_device_destroy,
46 };
47
48 struct fd_device *
msm_device_new(int fd,drmVersionPtr version)49 msm_device_new(int fd, drmVersionPtr version)
50 {
51 struct msm_device *msm_dev;
52 struct fd_device *dev;
53
54 STATIC_ASSERT(FD_BO_PREP_READ == MSM_PREP_READ);
55 STATIC_ASSERT(FD_BO_PREP_WRITE == MSM_PREP_WRITE);
56 STATIC_ASSERT(FD_BO_PREP_NOSYNC == MSM_PREP_NOSYNC);
57
58 msm_dev = calloc(1, sizeof(*msm_dev));
59 if (!msm_dev)
60 return NULL;
61
62 dev = &msm_dev->base;
63 dev->funcs = &funcs;
64 dev->version = version->version_minor;
65
66 if (version->version_minor >= FD_VERSION_CACHED_COHERENT) {
67 struct drm_msm_gem_new new_req = {
68 .size = 0x1000,
69 .flags = MSM_BO_CACHED_COHERENT,
70 };
71
72 /* The kernel is new enough to support MSM_BO_CACHED_COHERENT,
73 * but that is not a guarantee that the device we are running
74 * on supports it. So do a test allocation to find out.
75 */
76 if (!drmCommandWriteRead(fd, DRM_MSM_GEM_NEW,
77 &new_req, sizeof(new_req))) {
78 struct drm_gem_close close_req = {
79 .handle = new_req.handle,
80 };
81 drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &close_req);
82
83 dev->has_cached_coherent = true;
84 }
85 }
86
87 dev->bo_size = sizeof(struct msm_bo);
88
89 return dev;
90 }
91