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1 | /* |
2 | * Copyright (C) 2015 Red Hat, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining | |
6 | * a copy of this software and associated documentation files (the | |
7 | * "Software"), to deal in the Software without restriction, including | |
8 | * without limitation the rights to use, copy, modify, merge, publish, | |
9 | * distribute, sublicense, and/or sell copies of the Software, and to | |
10 | * permit persons to whom the Software is furnished to do so, subject to | |
11 | * the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice (including the | |
14 | * next paragraph) shall be included in all copies or substantial | |
15 | * portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
20 | * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE | |
21 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
22 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | |
23 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <drm/drmP.h> | |
27 | #include "virtgpu_drv.h" | |
28 | ||
29 | void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj) | |
30 | { | |
31 | struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj); | |
32 | ||
33 | if (obj) | |
34 | virtio_gpu_object_unref(&obj); | |
35 | } | |
36 | ||
37 | struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev, | |
38 | size_t size, bool kernel, | |
39 | bool pinned) | |
40 | { | |
41 | struct virtio_gpu_device *vgdev = dev->dev_private; | |
42 | struct virtio_gpu_object *obj; | |
43 | int ret; | |
44 | ||
45 | ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj); | |
46 | if (ret) | |
47 | return ERR_PTR(ret); | |
48 | ||
49 | return obj; | |
50 | } | |
51 | ||
52 | int virtio_gpu_gem_create(struct drm_file *file, | |
53 | struct drm_device *dev, | |
54 | uint64_t size, | |
55 | struct drm_gem_object **obj_p, | |
56 | uint32_t *handle_p) | |
57 | { | |
58 | struct virtio_gpu_object *obj; | |
59 | int ret; | |
60 | u32 handle; | |
61 | ||
62 | obj = virtio_gpu_alloc_object(dev, size, false, false); | |
63 | if (IS_ERR(obj)) | |
64 | return PTR_ERR(obj); | |
65 | ||
66 | ret = drm_gem_handle_create(file, &obj->gem_base, &handle); | |
67 | if (ret) { | |
68 | drm_gem_object_release(&obj->gem_base); | |
69 | return ret; | |
70 | } | |
71 | ||
72 | *obj_p = &obj->gem_base; | |
73 | ||
74 | /* drop reference from allocate - handle holds it now */ | |
75 | drm_gem_object_unreference_unlocked(&obj->gem_base); | |
76 | ||
77 | *handle_p = handle; | |
78 | return 0; | |
79 | } | |
80 | ||
81 | int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, | |
82 | struct drm_device *dev, | |
83 | struct drm_mode_create_dumb *args) | |
84 | { | |
85 | struct virtio_gpu_device *vgdev = dev->dev_private; | |
86 | struct drm_gem_object *gobj; | |
87 | struct virtio_gpu_object *obj; | |
88 | int ret; | |
89 | uint32_t pitch; | |
90 | uint32_t resid; | |
91 | ||
92 | pitch = args->width * ((args->bpp + 1) / 8); | |
93 | args->size = pitch * args->height; | |
94 | args->size = ALIGN(args->size, PAGE_SIZE); | |
95 | ||
96 | ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj, | |
97 | &args->handle); | |
98 | if (ret) | |
99 | goto fail; | |
100 | ||
101 | virtio_gpu_resource_id_get(vgdev, &resid); | |
102 | virtio_gpu_cmd_create_resource(vgdev, resid, | |
103 | 2, args->width, args->height); | |
104 | ||
105 | /* attach the object to the resource */ | |
106 | obj = gem_to_virtio_gpu_obj(gobj); | |
107 | ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL); | |
108 | if (ret) | |
109 | goto fail; | |
110 | ||
111 | obj->dumb = true; | |
112 | args->pitch = pitch; | |
113 | return ret; | |
114 | ||
115 | fail: | |
116 | return ret; | |
117 | } | |
118 | ||
119 | int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv, | |
120 | struct drm_device *dev, | |
121 | uint32_t handle) | |
122 | { | |
123 | return drm_gem_handle_delete(file_priv, handle); | |
124 | } | |
125 | ||
126 | int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv, | |
127 | struct drm_device *dev, | |
128 | uint32_t handle, uint64_t *offset_p) | |
129 | { | |
130 | struct drm_gem_object *gobj; | |
131 | struct virtio_gpu_object *obj; | |
132 | BUG_ON(!offset_p); | |
133 | gobj = drm_gem_object_lookup(dev, file_priv, handle); | |
134 | if (gobj == NULL) | |
135 | return -ENOENT; | |
136 | obj = gem_to_virtio_gpu_obj(gobj); | |
137 | *offset_p = virtio_gpu_object_mmap_offset(obj); | |
138 | drm_gem_object_unreference_unlocked(gobj); | |
139 | return 0; | |
140 | } |