1 /*
2  * Copyright (C) 2008 Maarten Maathuis.
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 
27 #include "drmP.h"
28 #include "drm_crtc_helper.h"
29 #include "nouveau_drv.h"
30 #include "nouveau_fb.h"
31 #include "nouveau_fbcon.h"
32 
33 static void
34 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
35 {
36 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
37 
38 	if (fb->nvbo)
39 		drm_gem_object_unreference_unlocked(fb->nvbo->gem);
40 
41 	drm_framebuffer_cleanup(drm_fb);
42 	kfree(fb);
43 }
44 
45 static int
46 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
47 				       struct drm_file *file_priv,
48 				       unsigned int *handle)
49 {
50 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
51 
52 	return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
53 }
54 
55 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
56 	.destroy = nouveau_user_framebuffer_destroy,
57 	.create_handle = nouveau_user_framebuffer_create_handle,
58 };
59 
60 int
61 nouveau_framebuffer_init(struct drm_device *dev, struct nouveau_framebuffer *nouveau_fb,
62 			 struct drm_mode_fb_cmd *mode_cmd, struct nouveau_bo *nvbo)
63 {
64 	int ret;
65 
66 	ret = drm_framebuffer_init(dev, &nouveau_fb->base, &nouveau_framebuffer_funcs);
67 	if (ret) {
68 		return ret;
69 	}
70 
71 	drm_helper_mode_fill_fb_struct(&nouveau_fb->base, mode_cmd);
72 	nouveau_fb->nvbo = nvbo;
73 	return 0;
74 }
75 
76 static struct drm_framebuffer *
77 nouveau_user_framebuffer_create(struct drm_device *dev,
78 				struct drm_file *file_priv,
79 				struct drm_mode_fb_cmd *mode_cmd)
80 {
81 	struct nouveau_framebuffer *nouveau_fb;
82 	struct drm_gem_object *gem;
83 	int ret;
84 
85 	gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
86 	if (!gem)
87 		return NULL;
88 
89 	nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
90 	if (!nouveau_fb)
91 		return NULL;
92 
93 	ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
94 	if (ret) {
95 		drm_gem_object_unreference(gem);
96 		return NULL;
97 	}
98 
99 	return &nouveau_fb->base;
100 }
101 
102 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
103 	.fb_create = nouveau_user_framebuffer_create,
104 	.output_poll_changed = nouveau_fbcon_output_poll_changed,
105 };
106 
107