?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Import 2.4.0-test2pre7
[davej-history.git] / drivers / char / drm / bufs.c
blob3d4c402224d69620ca345255fd08343e4eb75eed
1 /* bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
2 * Created: Tue Feb 2 08:37:54 1999 by faith@precisioninsight.com
3 *
4 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the next
15 * paragraph) shall be included in all copies or substantial portions of the
16 * Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
25 *
26 * Authors:
27 * Rickard E. (Rik) Faith <faith@precisioninsight.com>
28 *
29 */
30
31 #define __NO_VERSION__
32 #include <linux/config.h>
33 #include "drmP.h"
34 #include "linux/un.h"
35
36 /* Compute order. Can be made faster. */
37 int drm_order(unsigned long size)
38 {
39 int order;
40 unsigned long tmp;
41
42 for (order = 0, tmp = size; tmp >>= 1; ++order);
43 if (size & ~(1 << order)) ++order;
44 return order;
45 }
46
47 int drm_addmap(struct inode *inode, struct file *filp, unsigned int cmd,
48 unsigned long arg)
49 {
50 drm_file_t *priv = filp->private_data;
51 drm_device_t *dev = priv->dev;
52 drm_map_t *map;
53
54 if (!(filp->f_mode & 3)) return -EACCES; /* Require read/write */
55
56 map = drm_alloc(sizeof(*map), DRM_MEM_MAPS);
57 if (!map) return -ENOMEM;
58 if (copy_from_user(map, (drm_map_t *)arg, sizeof(*map))) {
59 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
60 return -EFAULT;
61 }
62
63 DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
64 map->offset, map->size, map->type);
65 if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
66 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
67 return -EINVAL;
68 }
69 map->mtrr = -1;
70 map->handle = 0;
71
72 switch (map->type) {
73 case _DRM_REGISTERS:
74 case _DRM_FRAME_BUFFER:
75 #ifndef __sparc__
76 if (map->offset + map->size < map->offset
77 || map->offset < virt_to_phys(high_memory)) {
78 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
79 return -EINVAL;
80 }
81 #endif
82 #ifdef CONFIG_MTRR
83 if (map->type == _DRM_FRAME_BUFFER
84 || (map->flags & _DRM_WRITE_COMBINING)) {
85 map->mtrr = mtrr_add(map->offset, map->size,
86 MTRR_TYPE_WRCOMB, 1);
87 }
88 #endif
89 map->handle = drm_ioremap(map->offset, map->size);
90 break;
91
92
93 case _DRM_SHM:
94 map->handle = (void *)drm_alloc_pages(drm_order(map->size)
95 - PAGE_SHIFT,
96 DRM_MEM_SAREA);
97 DRM_DEBUG("%ld %d %p\n", map->size, drm_order(map->size),
98 map->handle);
99 if (!map->handle) {
100 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
101 return -ENOMEM;
102 }
103 map->offset = (unsigned long)map->handle;
104 if (map->flags & _DRM_CONTAINS_LOCK) {
105 dev->lock.hw_lock = map->handle; /* Pointer to lock */
106 }
107 break;
108 default:
109 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
110 return -EINVAL;
111 }
112
113 down(&dev->struct_sem);
114 if (dev->maplist) {
115 ++dev->map_count;
116 dev->maplist = drm_realloc(dev->maplist,
117 (dev->map_count-1)
118 * sizeof(*dev->maplist),
119 dev->map_count
120 * sizeof(*dev->maplist),
121 DRM_MEM_MAPS);
122 } else {
123 dev->map_count = 1;
124 dev->maplist = drm_alloc(dev->map_count*sizeof(*dev->maplist),
125 DRM_MEM_MAPS);
126 }
127 dev->maplist[dev->map_count-1] = map;
128 up(&dev->struct_sem);
129
130 copy_to_user_ret((drm_map_t *)arg, map, sizeof(*map), -EFAULT);
131 if (map->type != _DRM_SHM) {
132 copy_to_user_ret(&((drm_map_t *)arg)->handle,
133 &map->offset,
134 sizeof(map->offset),
135 -EFAULT);
136 }
137 return 0;
138 }
139
140 int drm_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
141 unsigned long arg)
142 {
143 drm_file_t *priv = filp->private_data;
144 drm_device_t *dev = priv->dev;
145 drm_device_dma_t *dma = dev->dma;
146 drm_buf_desc_t request;
147 int count;
148 int order;
149 int size;
150 int total;
151 int page_order;
152 drm_buf_entry_t *entry;
153 unsigned long page;
154 drm_buf_t *buf;
155 int alignment;
156 unsigned long offset;
157 int i;
158 int byte_count;
159 int page_count;
160
161 if (!dma) return -EINVAL;
162
163 copy_from_user_ret(&request,
164 (drm_buf_desc_t *)arg,
165 sizeof(request),
166 -EFAULT);
167
168 count = request.count;
169 order = drm_order(request.size);
170 size = 1 << order;
171
172 DRM_DEBUG("count = %d, size = %d (%d), order = %d, queue_count = %d\n",
173 request.count, request.size, size, order, dev->queue_count);
174
175 if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
176 if (dev->queue_count) return -EBUSY; /* Not while in use */
177
178 alignment = (request.flags & DRM_PAGE_ALIGN) ? PAGE_ALIGN(size) :size;
179 page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
180 total = PAGE_SIZE << page_order;
181
182 spin_lock(&dev->count_lock);
183 if (dev->buf_use) {
184 spin_unlock(&dev->count_lock);
185 return -EBUSY;
186 }
187 atomic_inc(&dev->buf_alloc);
188 spin_unlock(&dev->count_lock);
189
190 down(&dev->struct_sem);
191 entry = &dma->bufs[order];
192 if (entry->buf_count) {
193 up(&dev->struct_sem);
194 atomic_dec(&dev->buf_alloc);
195 return -ENOMEM; /* May only call once for each order */
196 }
197
198 entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
199 DRM_MEM_BUFS);
200 if (!entry->buflist) {
201 up(&dev->struct_sem);
202 atomic_dec(&dev->buf_alloc);
203 return -ENOMEM;
204 }
205 memset(entry->buflist, 0, count * sizeof(*entry->buflist));
206
207 entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
208 DRM_MEM_SEGS);
209 if (!entry->seglist) {
210 drm_free(entry->buflist,
211 count * sizeof(*entry->buflist),
212 DRM_MEM_BUFS);
213 up(&dev->struct_sem);
214 atomic_dec(&dev->buf_alloc);
215 return -ENOMEM;
216 }
217 memset(entry->seglist, 0, count * sizeof(*entry->seglist));
218
219 dma->pagelist = drm_realloc(dma->pagelist,
220 dma->page_count * sizeof(*dma->pagelist),
221 (dma->page_count + (count << page_order))
222 * sizeof(*dma->pagelist),
223 DRM_MEM_PAGES);
224 DRM_DEBUG("pagelist: %d entries\n",
225 dma->page_count + (count << page_order));
226
227
228 entry->buf_size = size;
229 entry->page_order = page_order;
230 byte_count = 0;
231 page_count = 0;
232 while (entry->buf_count < count) {
233 if (!(page = drm_alloc_pages(page_order, DRM_MEM_DMA))) break;
234 entry->seglist[entry->seg_count++] = page;
235 for (i = 0; i < (1 << page_order); i++) {
236 DRM_DEBUG("page %d @ 0x%08lx\n",
237 dma->page_count + page_count,
238 page + PAGE_SIZE * i);
239 dma->pagelist[dma->page_count + page_count++]
240 = page + PAGE_SIZE * i;
241 }
242 for (offset = 0;
243 offset + size <= total && entry->buf_count < count;
244 offset += alignment, ++entry->buf_count) {
245 buf = &entry->buflist[entry->buf_count];
246 buf->idx = dma->buf_count + entry->buf_count;
247 buf->total = alignment;
248 buf->order = order;
249 buf->used = 0;
250 buf->offset = (dma->byte_count + byte_count + offset);
251 buf->address = (void *)(page + offset);
252 buf->next = NULL;
253 buf->waiting = 0;
254 buf->pending = 0;
255 init_waitqueue_head(&buf->dma_wait);
256 buf->pid = 0;
257 #if DRM_DMA_HISTOGRAM
258 buf->time_queued = 0;
259 buf->time_dispatched = 0;
260 buf->time_completed = 0;
261 buf->time_freed = 0;
262 #endif
263 DRM_DEBUG("buffer %d @ %p\n",
264 entry->buf_count, buf->address);
265 }
266 byte_count += PAGE_SIZE << page_order;
267 }
268
269 dma->buflist = drm_realloc(dma->buflist,
270 dma->buf_count * sizeof(*dma->buflist),
271 (dma->buf_count + entry->buf_count)
272 * sizeof(*dma->buflist),
273 DRM_MEM_BUFS);
274 for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
275 dma->buflist[i] = &entry->buflist[i - dma->buf_count];
276
277 dma->buf_count += entry->buf_count;
278 dma->seg_count += entry->seg_count;
279 dma->page_count += entry->seg_count << page_order;
280 dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
281
282 drm_freelist_create(&entry->freelist, entry->buf_count);
283 for (i = 0; i < entry->buf_count; i++) {
284 drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
285 }
286
287 up(&dev->struct_sem);
288
289 request.count = entry->buf_count;
290 request.size = size;
291
292 copy_to_user_ret((drm_buf_desc_t *)arg,
293 &request,
294 sizeof(request),
295 -EFAULT);
296
297 atomic_dec(&dev->buf_alloc);
298 return 0;
299 }
300
301 int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
302 unsigned long arg)
303 {
304 drm_file_t *priv = filp->private_data;
305 drm_device_t *dev = priv->dev;
306 drm_device_dma_t *dma = dev->dma;
307 drm_buf_info_t request;
308 int i;
309 int count;
310
311 if (!dma) return -EINVAL;
312
313 spin_lock(&dev->count_lock);
314 if (atomic_read(&dev->buf_alloc)) {
315 spin_unlock(&dev->count_lock);
316 return -EBUSY;
317 }
318 ++dev->buf_use; /* Can't allocate more after this call */
319 spin_unlock(&dev->count_lock);
320
321 copy_from_user_ret(&request,
322 (drm_buf_info_t *)arg,
323 sizeof(request),
324 -EFAULT);
325
326 for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
327 if (dma->bufs[i].buf_count) ++count;
328 }
329
330 DRM_DEBUG("count = %d\n", count);
331
332 if (request.count >= count) {
333 for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
334 if (dma->bufs[i].buf_count) {
335 copy_to_user_ret(&request.list[count].count,
336 &dma->bufs[i].buf_count,
337 sizeof(dma->bufs[0]
338 .buf_count),
339 -EFAULT);
340 copy_to_user_ret(&request.list[count].size,
341 &dma->bufs[i].buf_size,
342 sizeof(dma->bufs[0].buf_size),
343 -EFAULT);
344 copy_to_user_ret(&request.list[count].low_mark,
345 &dma->bufs[i]
346 .freelist.low_mark,
347 sizeof(dma->bufs[0]
348 .freelist.low_mark),
349 -EFAULT);
350 copy_to_user_ret(&request.list[count]
351 .high_mark,
352 &dma->bufs[i]
353 .freelist.high_mark,
354 sizeof(dma->bufs[0]
355 .freelist.high_mark),
356 -EFAULT);
357 DRM_DEBUG("%d %d %d %d %d\n",
358 i,
359 dma->bufs[i].buf_count,
360 dma->bufs[i].buf_size,
361 dma->bufs[i].freelist.low_mark,
362 dma->bufs[i].freelist.high_mark);
363 ++count;
364 }
365 }
366 }
367 request.count = count;
368
369 copy_to_user_ret((drm_buf_info_t *)arg,
370 &request,
371 sizeof(request),
372 -EFAULT);
373
374 return 0;
375 }
376
377 int drm_markbufs(struct inode *inode, struct file *filp, unsigned int cmd,
378 unsigned long arg)
379 {
380 drm_file_t *priv = filp->private_data;
381 drm_device_t *dev = priv->dev;
382 drm_device_dma_t *dma = dev->dma;
383 drm_buf_desc_t request;
384 int order;
385 drm_buf_entry_t *entry;
386
387 if (!dma) return -EINVAL;
388
389 copy_from_user_ret(&request,
390 (drm_buf_desc_t *)arg,
391 sizeof(request),
392 -EFAULT);
393
394 DRM_DEBUG("%d, %d, %d\n",
395 request.size, request.low_mark, request.high_mark);
396 order = drm_order(request.size);
397 if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
398 entry = &dma->bufs[order];
399
400 if (request.low_mark < 0 || request.low_mark > entry->buf_count)
401 return -EINVAL;
402 if (request.high_mark < 0 || request.high_mark > entry->buf_count)
403 return -EINVAL;
404
405 entry->freelist.low_mark = request.low_mark;
406 entry->freelist.high_mark = request.high_mark;
407
408 return 0;
409 }
410
411 int drm_freebufs(struct inode *inode, struct file *filp, unsigned int cmd,
412 unsigned long arg)
413 {
414 drm_file_t *priv = filp->private_data;
415 drm_device_t *dev = priv->dev;
416 drm_device_dma_t *dma = dev->dma;
417 drm_buf_free_t request;
418 int i;
419 int idx;
420 drm_buf_t *buf;
421
422 if (!dma) return -EINVAL;
423
424 copy_from_user_ret(&request,
425 (drm_buf_free_t *)arg,
426 sizeof(request),
427 -EFAULT);
428
429 DRM_DEBUG("%d\n", request.count);
430 for (i = 0; i < request.count; i++) {
431 copy_from_user_ret(&idx,
432 &request.list[i],
433 sizeof(idx),
434 -EFAULT);
435 if (idx < 0 || idx >= dma->buf_count) {
436 DRM_ERROR("Index %d (of %d max)\n",
437 idx, dma->buf_count - 1);
438 return -EINVAL;
439 }
440 buf = dma->buflist[idx];
441 if (buf->pid != current->pid) {
442 DRM_ERROR("Process %d freeing buffer owned by %d\n",
443 current->pid, buf->pid);
444 return -EINVAL;
445 }
446 drm_free_buffer(dev, buf);
447 }
448
449 return 0;
450 }
451
452 int drm_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
453 unsigned long arg)
454 {
455 drm_file_t *priv = filp->private_data;
456 drm_device_t *dev = priv->dev;
457 drm_device_dma_t *dma = dev->dma;
458 int retcode = 0;
459 const int zero = 0;
460 unsigned long virtual;
461 unsigned long address;
462 drm_buf_map_t request;
463 int i;
464
465 if (!dma) return -EINVAL;
466
467 DRM_DEBUG("\n");
468
469 spin_lock(&dev->count_lock);
470 if (atomic_read(&dev->buf_alloc)) {
471 spin_unlock(&dev->count_lock);
472 return -EBUSY;
473 }
474 ++dev->buf_use; /* Can't allocate more after this call */
475 spin_unlock(&dev->count_lock);
476
477 copy_from_user_ret(&request,
478 (drm_buf_map_t *)arg,
479 sizeof(request),
480 -EFAULT);
481
482 if (request.count >= dma->buf_count) {
483 down(&current->mm->mmap_sem);
484 virtual = do_mmap(filp, 0, dma->byte_count,
485 PROT_READ|PROT_WRITE, MAP_SHARED, 0);
486 up(&current->mm->mmap_sem);
487 if (virtual > -1024UL) {
488 /* Real error */
489 retcode = (signed long)virtual;
490 goto done;
491 }
492 request.virtual = (void *)virtual;
493
494 for (i = 0; i < dma->buf_count; i++) {
495 if (copy_to_user(&request.list[i].idx,
496 &dma->buflist[i]->idx,
497 sizeof(request.list[0].idx))) {
498 retcode = -EFAULT;
499 goto done;
500 }
501 if (copy_to_user(&request.list[i].total,
502 &dma->buflist[i]->total,
503 sizeof(request.list[0].total))) {
504 retcode = -EFAULT;
505 goto done;
506 }
507 if (copy_to_user(&request.list[i].used,
508 &zero,
509 sizeof(zero))) {
510 retcode = -EFAULT;
511 goto done;
512 }
513 address = virtual + dma->buflist[i]->offset;
514 if (copy_to_user(&request.list[i].address,
515 &address,
516 sizeof(address))) {
517 retcode = -EFAULT;
518 goto done;
519 }
520 }
521 }
522 done:
523 request.count = dma->buf_count;
524 DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
525
526 copy_to_user_ret((drm_buf_map_t *)arg,
527 &request,
528 sizeof(request),
529 -EFAULT);
530
531 return retcode;
532 }
Copy of Dave Jones history.git as used by http://archive.org/details/git-history-of-linux