1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/**
* \file drm_drawable.c
* IOCTLs for drawables
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
* \author Michel Dänzer <michel@tungstengraphics.com>
*/
/*
* Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "drmP.h"
/**
* Allocate drawable ID and memory to store information about it.
*/
int drm_adddraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
unsigned long irqflags;
drm_draw_t draw;
int new_id = 0;
int ret;
again:
if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Out of memory expanding drawable idr\n");
return -ENOMEM;
}
spin_lock_irqsave(&dev->drw_lock, irqflags);
ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id);
if (ret == -EAGAIN) {
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
goto again;
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
draw.handle = new_id;
DRM_DEBUG("%d\n", draw.handle);
DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
return 0;
}
/**
* Free drawable ID and memory to store information about it.
*/
int drm_rmdraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_draw_t draw;
unsigned long irqflags;
DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
sizeof(draw));
spin_lock_irqsave(&dev->drw_lock, irqflags);
drm_free(drm_get_drawable_info(dev, draw.handle),
sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
idr_remove(&dev->drw_idr, draw.handle);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_DEBUG("%d\n", draw.handle);
return 0;
}
int drm_update_drawable_info(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_update_draw_t update;
unsigned long irqflags;
drm_clip_rect_t *rects;
struct drm_drawable_info *info;
int err;
DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
sizeof(update));
info = idr_find(&dev->drw_idr, update.handle);
if (!info) {
info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
if (!info)
return -ENOMEM;
if (IS_ERR(idr_replace(&dev->drw_idr, info, update.handle))) {
DRM_ERROR("No such drawable %d\n", update.handle);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
return -EINVAL;
}
}
switch (update.type) {
case DRM_DRAWABLE_CLIPRECTS:
if (update.num != info->num_rects) {
rects = drm_alloc(update.num * sizeof(drm_clip_rect_t),
DRM_MEM_BUFS);
} else
rects = info->rects;
if (update.num && !rects) {
DRM_ERROR("Failed to allocate cliprect memory\n");
err = DRM_ERR(ENOMEM);
goto error;
}
if (update.num && DRM_COPY_FROM_USER(rects,
(drm_clip_rect_t __user *)
(unsigned long)update.data,
update.num *
sizeof(*rects))) {
DRM_ERROR("Failed to copy cliprects from userspace\n");
err = DRM_ERR(EFAULT);
goto error;
}
spin_lock_irqsave(&dev->drw_lock, irqflags);
if (rects != info->rects) {
drm_free(info->rects, info->num_rects *
sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
}
info->rects = rects;
info->num_rects = update.num;
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_DEBUG("Updated %d cliprects for drawable %d\n",
info->num_rects, update.handle);
break;
default:
DRM_ERROR("Invalid update type %d\n", update.type);
return DRM_ERR(EINVAL);
}
return 0;
error:
if (rects != info->rects)
drm_free(rects, update.num * sizeof(drm_clip_rect_t),
DRM_MEM_BUFS);
return err;
}
/**
* Caller must hold the drawable spinlock!
*/
drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id)
{
return idr_find(&dev->drw_idr, id);
}
EXPORT_SYMBOL(drm_get_drawable_info);
static int drm_drawable_free(int idr, void *p, void *data)
{
struct drm_drawable_info *info = p;
if (info) {
drm_free(info->rects, info->num_rects *
sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
}
return 0;
}
void drm_drawable_free_all(drm_device_t *dev)
{
idr_for_each(&dev->drw_idr, drm_drawable_free, NULL);
idr_remove_all(&dev->drw_idr);
}
|
