5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 * \author Michel Dänzer <michel@tungstengraphics.com>
11 * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
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.
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:
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
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.
41 * Allocate drawable ID and memory to store information about it.
43 int drm_adddraw(DRM_IOCTL_ARGS)
46 unsigned long irqflags;
48 u32 *bitfield = dev->drw_bitfield;
49 unsigned int bitfield_length = dev->drw_bitfield_length;
50 drm_drawable_info_t **info = dev->drw_info;
51 unsigned int info_length = dev->drw_info_length;
54 for (i = 0, j = 0; i < bitfield_length; i++) {
55 if (bitfield[i] == ~0)
58 for (; j < 8 * sizeof(*bitfield); j++)
59 if (!(bitfield[i] & (1 << j)))
64 if (i == bitfield_length) {
67 bitfield = drm_alloc(bitfield_length * sizeof(*bitfield),
71 DRM_ERROR("Failed to allocate new drawable bitfield\n");
72 return DRM_ERR(ENOMEM);
75 if (8 * sizeof(*bitfield) * bitfield_length > info_length) {
76 info_length += 8 * sizeof(*bitfield);
78 info = drm_alloc(info_length * sizeof(*info),
82 DRM_ERROR("Failed to allocate new drawable info"
86 bitfield_length * sizeof(*bitfield),
88 return DRM_ERR(ENOMEM);
95 draw.handle = i * 8 * sizeof(*bitfield) + j;
96 DRM_DEBUG("%d\n", draw.handle);
98 spin_lock_irqsave(&dev->drw_lock, irqflags);
100 bitfield[i] |= 1 << j;
101 info[draw.handle] = NULL;
103 if (bitfield != dev->drw_bitfield) {
104 memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length *
106 drm_free(dev->drw_bitfield, sizeof(*bitfield) *
107 dev->drw_bitfield_length, DRM_MEM_BUFS);
108 dev->drw_bitfield = bitfield;
109 dev->drw_bitfield_length = bitfield_length;
112 if (info != dev->drw_info) {
113 memcpy(info, dev->drw_info, dev->drw_info_length *
115 drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length,
117 dev->drw_info = info;
118 dev->drw_info_length = info_length;
121 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
123 DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
129 * Free drawable ID and memory to store information about it.
131 int drm_rmdraw(DRM_IOCTL_ARGS)
135 unsigned int idx, shift;
136 unsigned long irqflags;
137 u32 *bitfield = dev->drw_bitfield;
138 unsigned int bitfield_length = dev->drw_bitfield_length;
139 drm_drawable_info_t **info = dev->drw_info;
140 unsigned int info_length = dev->drw_info_length;
142 DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
145 idx = draw.handle / (8 * sizeof(*bitfield));
146 shift = draw.handle % (8 * sizeof(*bitfield));
148 if (idx >= bitfield_length ||
149 !(bitfield[idx] & (1 << shift))) {
150 DRM_DEBUG("No such drawable %d\n", draw.handle);
154 spin_lock_irqsave(&dev->drw_lock, irqflags);
156 bitfield[idx] &= ~(1 << shift);
158 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
160 /* Can we shrink the arrays? */
161 if (idx == bitfield_length - 1) {
162 while (idx >= 0 && !bitfield[idx])
165 bitfield_length = idx + 1;
167 if (idx != draw.handle / (8 * sizeof(*bitfield)))
168 bitfield = drm_alloc(bitfield_length *
169 sizeof(*bitfield), DRM_MEM_BUFS);
171 if (!bitfield && bitfield_length) {
172 bitfield = dev->drw_bitfield;
173 bitfield_length = dev->drw_bitfield_length;
177 if (bitfield != dev->drw_bitfield) {
178 info_length = 8 * sizeof(*bitfield) * bitfield_length;
180 info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS);
182 if (!info && info_length) {
183 info = dev->drw_info;
184 info_length = dev->drw_info_length;
187 spin_lock_irqsave(&dev->drw_lock, irqflags);
189 memcpy(bitfield, dev->drw_bitfield, bitfield_length *
191 drm_free(dev->drw_bitfield, sizeof(*bitfield) *
192 dev->drw_bitfield_length, DRM_MEM_BUFS);
193 dev->drw_bitfield = bitfield;
194 dev->drw_bitfield_length = bitfield_length;
196 if (info != dev->drw_info) {
197 memcpy(info, dev->drw_info, info_length *
199 drm_free(dev->drw_info, sizeof(*info) *
200 dev->drw_info_length, DRM_MEM_BUFS);
201 dev->drw_info = info;
202 dev->drw_info_length = info_length;
205 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
208 DRM_DEBUG("%d\n", draw.handle);
212 int drm_update_drawable_info(DRM_IOCTL_ARGS) {
214 drm_update_draw_t update;
215 unsigned int id, idx, shift;
216 u32 *bitfield = dev->drw_bitfield;
217 unsigned long irqflags, bitfield_length = dev->drw_bitfield_length;
218 drm_drawable_info_t *info;
219 drm_clip_rect_t *rects;
222 DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
226 idx = id / (8 * sizeof(*bitfield));
227 shift = id % (8 * sizeof(*bitfield));
229 if (idx >= bitfield_length || !(bitfield[idx] & (1 << shift))) {
230 DRM_ERROR("No such drawable %d\n", update.handle);
231 return DRM_ERR(EINVAL);
234 info = dev->drw_info[id];
237 info = drm_calloc(1, sizeof(drm_drawable_info_t), DRM_MEM_BUFS);
240 DRM_ERROR("Failed to allocate drawable info memory\n");
241 return DRM_ERR(ENOMEM);
245 switch (update.type) {
246 case DRM_DRAWABLE_CLIPRECTS:
247 if (update.num != info->num_rects) {
248 rects = drm_alloc(update.num * sizeof(drm_clip_rect_t),
253 if (update.num && !rects) {
254 DRM_ERROR("Failed to allocate cliprect memory\n");
255 err = DRM_ERR(ENOMEM);
259 if (update.num && DRM_COPY_FROM_USER(rects,
260 (drm_clip_rect_t __user *)
261 (unsigned long)update.data,
264 DRM_ERROR("Failed to copy cliprects from userspace\n");
265 err = DRM_ERR(EFAULT);
269 spin_lock_irqsave(&dev->drw_lock, irqflags);
271 if (rects != info->rects) {
272 drm_free(info->rects, info->num_rects *
273 sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
277 info->num_rects = update.num;
278 dev->drw_info[id] = info;
280 spin_unlock_irqrestore(&dev->drw_lock, irqflags);
282 DRM_DEBUG("Updated %d cliprects for drawable %d\n",
283 info->num_rects, id);
286 DRM_ERROR("Invalid update type %d\n", update.type);
287 return DRM_ERR(EINVAL);
293 if (!dev->drw_info[id])
294 drm_free(info, sizeof(*info), DRM_MEM_BUFS);
295 else if (rects != dev->drw_info[id]->rects)
296 drm_free(rects, update.num *
297 sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
303 * Caller must hold the drawable spinlock!
305 drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) {
306 u32 *bitfield = dev->drw_bitfield;
307 unsigned int idx = id / (8 * sizeof(*bitfield));
308 unsigned int shift = id % (8 * sizeof(*bitfield));
310 if (idx >= dev->drw_bitfield_length ||
311 !(bitfield[idx] & (1 << shift))) {
312 DRM_DEBUG("No such drawable %d\n", id);
316 return dev->drw_info[id];
318 EXPORT_SYMBOL(drm_get_drawable_info);