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[dragonfly.git] / sys / dev / drm / drm_drawable.c
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1/*-
2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * Rickard E. (Rik) Faith <faith@valinux.com>
27 * Gareth Hughes <gareth@valinux.com>
28 *
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29 */
30
31/** @file drm_drawable.c
32 * This file implements ioctls to store information along with DRM drawables,
33 * such as the current set of cliprects for vblank-synced buffer swaps.
34 */
35
b3705d71 36#include "dev/drm/drmP.h"
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37
38struct bsd_drm_drawable_info {
39 struct drm_drawable_info info;
40 int handle;
41 RB_ENTRY(bsd_drm_drawable_info) tree;
42};
43
44static int
45drm_drawable_compare(struct bsd_drm_drawable_info *a,
46 struct bsd_drm_drawable_info *b)
47{
48 if (a->handle > b->handle)
49 return 1;
50 if (a->handle < b->handle)
51 return -1;
52 return 0;
53}
b3705d71 54
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55RB_PROTOTYPE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
56 drm_drawable_compare);
57RB_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
58 drm_drawable_compare);
59
60struct drm_drawable_info *
b3705d71 61drm_get_drawable_info(struct drm_device *dev, int handle)
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62{
63 struct bsd_drm_drawable_info find, *result;
64
65 find.handle = handle;
66 result = RB_FIND(drawable_tree, &dev->drw_head, &find);
67
68 return &result->info;
69}
70
b3705d71 71int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
7f3c3d6f 72{
b3705d71 73 struct drm_draw *draw = data;
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74 struct bsd_drm_drawable_info *info;
75
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76 info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
77 M_NOWAIT | M_ZERO);
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78 if (info == NULL)
79 return ENOMEM;
80
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81 /*
82 * XXX Only valid for sizeof(int) == sizeof(void *)
83 */
bfc09ba0 84 info->handle = (intptr_t)info;
b3705d71 85
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86 DRM_SPINLOCK(&dev->drw_lock);
87 RB_INSERT(drawable_tree, &dev->drw_head, info);
88 draw->handle = info->handle;
89 DRM_SPINUNLOCK(&dev->drw_lock);
90
91 DRM_DEBUG("%d\n", draw->handle);
92
93 return 0;
94}
95
b3705d71 96int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
7f3c3d6f 97{
b3705d71 98 struct drm_draw *draw = (struct drm_draw *)data;
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99 struct drm_drawable_info *info;
100
101 DRM_SPINLOCK(&dev->drw_lock);
102 info = drm_get_drawable_info(dev, draw->handle);
103 if (info != NULL) {
104 RB_REMOVE(drawable_tree, &dev->drw_head,
105 (struct bsd_drm_drawable_info *)info);
106 DRM_SPINUNLOCK(&dev->drw_lock);
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107 free(info->rects, DRM_MEM_DRAWABLE);
108 free(info, DRM_MEM_DRAWABLE);
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109 return 0;
110 } else {
111 DRM_SPINUNLOCK(&dev->drw_lock);
112 return EINVAL;
113 }
114}
115
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116int drm_update_draw(struct drm_device *dev, void *data,
117 struct drm_file *file_priv)
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118{
119 struct drm_drawable_info *info;
120 struct drm_update_draw *update = (struct drm_update_draw *)data;
121 int ret;
122
123 info = drm_get_drawable_info(dev, update->handle);
124 if (info == NULL)
125 return EINVAL;
126
127 switch (update->type) {
128 case DRM_DRAWABLE_CLIPRECTS:
129 DRM_SPINLOCK(&dev->drw_lock);
130 if (update->num != info->num_rects) {
b3705d71 131 free(info->rects, DRM_MEM_DRAWABLE);
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132 info->rects = NULL;
133 info->num_rects = 0;
134 }
135 if (update->num == 0) {
136 DRM_SPINUNLOCK(&dev->drw_lock);
137 return 0;
138 }
139 if (info->rects == NULL) {
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140 info->rects = malloc(sizeof(*info->rects) *
141 update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
142 if (info->rects == NULL) {
143 DRM_SPINUNLOCK(&dev->drw_lock);
7f3c3d6f 144 return ENOMEM;
b3705d71 145 }
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146 info->num_rects = update->num;
147 }
148 /* For some reason the pointer arg is unsigned long long. */
149 ret = copyin((void *)(intptr_t)update->data, info->rects,
150 sizeof(*info->rects) * info->num_rects);
151 DRM_SPINUNLOCK(&dev->drw_lock);
152 return ret;
153 default:
154 return EINVAL;
155 }
156}
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157
158void drm_drawable_free_all(struct drm_device *dev)
159{
160 struct bsd_drm_drawable_info *info, *next;
161
162 DRM_SPINLOCK(&dev->drw_lock);
163 for (info = RB_MIN(drawable_tree, &dev->drw_head);
164 info != NULL ; info = next) {
165 next = RB_NEXT(drawable_tree, &dev->drw_head, info);
eaa63fc9 166 RB_REMOVE(drawable_tree, &dev->drw_head, info);
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167 DRM_SPINUNLOCK(&dev->drw_lock);
168 free(info->info.rects, DRM_MEM_DRAWABLE);
169 free(info, DRM_MEM_DRAWABLE);
170 DRM_SPINLOCK(&dev->drw_lock);
171 }
172 DRM_SPINUNLOCK(&dev->drw_lock);
173}