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 <[email protected]>
27 * Gareth Hughes <[email protected]>
28 *
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 /** @file drm_drawable.c
35 * This file implements ioctls to store information along with DRM drawables,
36 * such as the current set of cliprects for vblank-synced buffer swaps.
37 */
38
39 #include "dev/drm/drmP.h"
40
41 struct bsd_drm_drawable_info {
42 struct drm_drawable_info info;
43 int handle;
44 RB_ENTRY(bsd_drm_drawable_info) tree;
45 };
46
47 static int
drm_drawable_compare(struct bsd_drm_drawable_info * a,struct bsd_drm_drawable_info * b)48 drm_drawable_compare(struct bsd_drm_drawable_info *a,
49 struct bsd_drm_drawable_info *b)
50 {
51 if (a->handle > b->handle)
52 return 1;
53 if (a->handle < b->handle)
54 return -1;
55 return 0;
56 }
57
58 RB_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
59 drm_drawable_compare);
60
61 struct drm_drawable_info *
drm_get_drawable_info(struct drm_device * dev,int handle)62 drm_get_drawable_info(struct drm_device *dev, int handle)
63 {
64 struct bsd_drm_drawable_info find, *result;
65
66 find.handle = handle;
67 result = RB_FIND(drawable_tree, &dev->drw_head, &find);
68
69 return &result->info;
70 }
71
drm_adddraw(struct drm_device * dev,void * data,struct drm_file * file_priv)72 int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
73 {
74 struct drm_draw *draw = data;
75 struct bsd_drm_drawable_info *info;
76
77 info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
78 M_NOWAIT | M_ZERO);
79 if (info == NULL)
80 return ENOMEM;
81
82 info->handle = alloc_unr(dev->drw_unrhdr);
83 DRM_SPINLOCK(&dev->drw_lock);
84 RB_INSERT(drawable_tree, &dev->drw_head, info);
85 draw->handle = info->handle;
86 DRM_SPINUNLOCK(&dev->drw_lock);
87
88 DRM_DEBUG("%d\n", draw->handle);
89
90 return 0;
91 }
92
drm_rmdraw(struct drm_device * dev,void * data,struct drm_file * file_priv)93 int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
94 {
95 struct drm_draw *draw = (struct drm_draw *)data;
96 struct drm_drawable_info *info;
97
98 DRM_SPINLOCK(&dev->drw_lock);
99 info = drm_get_drawable_info(dev, draw->handle);
100 if (info != NULL) {
101 RB_REMOVE(drawable_tree, &dev->drw_head,
102 (struct bsd_drm_drawable_info *)info);
103 DRM_SPINUNLOCK(&dev->drw_lock);
104 free_unr(dev->drw_unrhdr, draw->handle);
105 free(info->rects, DRM_MEM_DRAWABLE);
106 free(info, DRM_MEM_DRAWABLE);
107 return 0;
108 } else {
109 DRM_SPINUNLOCK(&dev->drw_lock);
110 return EINVAL;
111 }
112 }
113
drm_update_draw(struct drm_device * dev,void * data,struct drm_file * file_priv)114 int drm_update_draw(struct drm_device *dev, void *data,
115 struct drm_file *file_priv)
116 {
117 struct drm_drawable_info *info;
118 struct drm_update_draw *update = (struct drm_update_draw *)data;
119 int ret;
120
121 info = drm_get_drawable_info(dev, update->handle);
122 if (info == NULL)
123 return EINVAL;
124
125 switch (update->type) {
126 case DRM_DRAWABLE_CLIPRECTS:
127 DRM_SPINLOCK(&dev->drw_lock);
128 if (update->num != info->num_rects) {
129 free(info->rects, DRM_MEM_DRAWABLE);
130 info->rects = NULL;
131 info->num_rects = 0;
132 }
133 if (update->num == 0) {
134 DRM_SPINUNLOCK(&dev->drw_lock);
135 return 0;
136 }
137 if (info->rects == NULL) {
138 info->rects = malloc(sizeof(*info->rects) *
139 update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
140 if (info->rects == NULL) {
141 DRM_SPINUNLOCK(&dev->drw_lock);
142 return ENOMEM;
143 }
144 info->num_rects = update->num;
145 }
146 /* For some reason the pointer arg is unsigned long long. */
147 ret = copyin((void *)(intptr_t)update->data, info->rects,
148 sizeof(*info->rects) * info->num_rects);
149 DRM_SPINUNLOCK(&dev->drw_lock);
150 return ret;
151 default:
152 return EINVAL;
153 }
154 }
155
drm_drawable_free_all(struct drm_device * dev)156 void drm_drawable_free_all(struct drm_device *dev)
157 {
158 struct bsd_drm_drawable_info *info, *next;
159
160 DRM_SPINLOCK(&dev->drw_lock);
161 for (info = RB_MIN(drawable_tree, &dev->drw_head);
162 info != NULL ; info = next) {
163 next = RB_NEXT(drawable_tree, &dev->drw_head, info);
164 RB_REMOVE(drawable_tree, &dev->drw_head,
165 (struct bsd_drm_drawable_info *)info);
166 DRM_SPINUNLOCK(&dev->drw_lock);
167 free_unr(dev->drw_unrhdr, info->handle);
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 }
174