tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/**
2 * \file drm_drawable.c
3 * IOCTLs for drawables
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 * \author Michel Dänzer <michel@tungstengraphics.com>
8 */
9
10/*
11 * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
12 *
13 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
14 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
15 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota.
16 * All Rights Reserved.
17 *
18 * Permission is hereby granted, free of charge, to any person obtaining a
19 * copy of this software and associated documentation files (the "Software"),
20 * to deal in the Software without restriction, including without limitation
21 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
22 * and/or sell copies of the Software, and to permit persons to whom the
23 * Software is furnished to do so, subject to the following conditions:
24 *
25 * The above copyright notice and this permission notice (including the next
26 * paragraph) shall be included in all copies or substantial portions of the
27 * Software.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
30 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
31 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
32 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
33 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
34 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
35 * OTHER DEALINGS IN THE SOFTWARE.
36 */
37
38#include "drmP.h"
39
40/**
41 * Allocate drawable ID and memory to store information about it.
42 */
43int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
44{
45 unsigned long irqflags;
46 struct drm_draw *draw = data;
47 int new_id = 0;
48 int ret;
49
50again:
51 if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) {
52 DRM_ERROR("Out of memory expanding drawable idr\n");
53 return -ENOMEM;
54 }
55
56 spin_lock_irqsave(&dev->drw_lock, irqflags);
57 ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id);
58 if (ret == -EAGAIN) {
59 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
60 goto again;
61 }
62
63 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
64
65 draw->handle = new_id;
66
67 DRM_DEBUG("%d\n", draw->handle);
68
69 return 0;
70}
71
72/**
73 * Free drawable ID and memory to store information about it.
74 */
75int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
76{
77 struct drm_draw *draw = data;
78 unsigned long irqflags;
79 struct drm_drawable_info *info;
80
81 spin_lock_irqsave(&dev->drw_lock, irqflags);
82
83 info = drm_get_drawable_info(dev, draw->handle);
84 if (info == NULL) {
85 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
86 return -EINVAL;
87 }
88 drm_free(info->rects, info->num_rects * sizeof(struct drm_clip_rect),
89 DRM_MEM_BUFS);
90 drm_free(info, sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
91
92 idr_remove(&dev->drw_idr, draw->handle);
93
94 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
95 DRM_DEBUG("%d\n", draw->handle);
96 return 0;
97}
98
99int drm_update_drawable_info(struct drm_device *dev, void *data, struct drm_file *file_priv)
100{
101 struct drm_update_draw *update = data;
102 unsigned long irqflags;
103 struct drm_clip_rect *rects;
104 struct drm_drawable_info *info;
105 int err;
106
107 info = idr_find(&dev->drw_idr, update->handle);
108 if (!info) {
109 info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
110 if (!info)
111 return -ENOMEM;
112 if (IS_ERR(idr_replace(&dev->drw_idr, info, update->handle))) {
113 DRM_ERROR("No such drawable %d\n", update->handle);
114 drm_free(info, sizeof(*info), DRM_MEM_BUFS);
115 return -EINVAL;
116 }
117 }
118
119 switch (update->type) {
120 case DRM_DRAWABLE_CLIPRECTS:
121 if (update->num == 0)
122 rects = NULL;
123 else if (update->num != info->num_rects) {
124 rects = drm_alloc(update->num * sizeof(struct drm_clip_rect),
125 DRM_MEM_BUFS);
126 } else
127 rects = info->rects;
128
129 if (update->num && !rects) {
130 DRM_ERROR("Failed to allocate cliprect memory\n");
131 err = -ENOMEM;
132 goto error;
133 }
134
135 if (update->num && DRM_COPY_FROM_USER(rects,
136 (struct drm_clip_rect __user *)
137 (unsigned long)update->data,
138 update->num *
139 sizeof(*rects))) {
140 DRM_ERROR("Failed to copy cliprects from userspace\n");
141 err = -EFAULT;
142 goto error;
143 }
144
145 spin_lock_irqsave(&dev->drw_lock, irqflags);
146
147 if (rects != info->rects) {
148 drm_free(info->rects, info->num_rects *
149 sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
150 }
151
152 info->rects = rects;
153 info->num_rects = update->num;
154
155 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
156
157 DRM_DEBUG("Updated %d cliprects for drawable %d\n",
158 info->num_rects, update->handle);
159 break;
160 default:
161 DRM_ERROR("Invalid update type %d\n", update->type);
162 return -EINVAL;
163 }
164
165 return 0;
166
167error:
168 if (rects != info->rects)
169 drm_free(rects, update->num * sizeof(struct drm_clip_rect),
170 DRM_MEM_BUFS);
171
172 return err;
173}
174
175/**
176 * Caller must hold the drawable spinlock!
177 */
178struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id)
179{
180 return idr_find(&dev->drw_idr, id);
181}
182EXPORT_SYMBOL(drm_get_drawable_info);
183
184static int drm_drawable_free(int idr, void *p, void *data)
185{
186 struct drm_drawable_info *info = p;
187
188 if (info) {
189 drm_free(info->rects, info->num_rects *
190 sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
191 drm_free(info, sizeof(*info), DRM_MEM_BUFS);
192 }
193
194 return 0;
195}
196
197void drm_drawable_free_all(struct drm_device *dev)
198{
199 idr_for_each(&dev->drw_idr, drm_drawable_free, NULL);
200 idr_remove_all(&dev->drw_idr);
201}