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 	struct drm_device *dev = drm_fb->dev;
38 
39 	if (drm_fb->fbdev)
40 		nouveau_fbcon_remove(dev, drm_fb);
41 
42 	if (fb->nvbo) {
43 		mutex_lock(&dev->struct_mutex);
44 		drm_gem_object_unreference(fb->nvbo->gem);
45 		mutex_unlock(&dev->struct_mutex);
46 	}
47 
48 	drm_framebuffer_cleanup(drm_fb);
49 	kfree(fb);
50 }
51 
52 static int
53 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
54 				       struct drm_file *file_priv,
55 				       unsigned int *handle)
56 {
57 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
58 
59 	return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
60 }
61 
62 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
63 	.destroy = nouveau_user_framebuffer_destroy,
64 	.create_handle = nouveau_user_framebuffer_create_handle,
65 };
66 
67 struct drm_framebuffer *
68 nouveau_framebuffer_create(struct drm_device *dev, struct nouveau_bo *nvbo,
69 			   struct drm_mode_fb_cmd *mode_cmd)
70 {
71 	struct nouveau_framebuffer *fb;
72 	int ret;
73 
74 	fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
75 	if (!fb)
76 		return NULL;
77 
78 	ret = drm_framebuffer_init(dev, &fb->base, &nouveau_framebuffer_funcs);
79 	if (ret) {
80 		kfree(fb);
81 		return NULL;
82 	}
83 
84 	drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
85 
86 	fb->nvbo = nvbo;
87 	return &fb->base;
88 }
89 
90 static struct drm_framebuffer *
91 nouveau_user_framebuffer_create(struct drm_device *dev,
92 				struct drm_file *file_priv,
93 				struct drm_mode_fb_cmd *mode_cmd)
94 {
95 	struct drm_framebuffer *fb;
96 	struct drm_gem_object *gem;
97 
98 	gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
99 	if (!gem)
100 		return NULL;
101 
102 	fb = nouveau_framebuffer_create(dev, nouveau_gem_object(gem), mode_cmd);
103 	if (!fb) {
104 		drm_gem_object_unreference(gem);
105 		return NULL;
106 	}
107 
108 	return fb;
109 }
110 
111 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
112 	.fb_create = nouveau_user_framebuffer_create,
113 	.fb_changed = nouveau_fbcon_probe,
114 };
115 
116