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1/*-
2 * Copyright 1999, 2000 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 <faith@valinux.com>
27 * Gareth Hughes <gareth@valinux.com>
28 *
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/drm/drm_bufs.c 183603 2008-10-04 14:45:34Z rnoland $");
32__FBSDID("$FreeBSD: head/sys/dev/drm/drm_bufs.c 183833 2008-10-13 18:03:27Z rnoland $");
33
34/** @file drm_bufs.c
35 * Implementation of the ioctls for setup of DRM mappings and DMA buffers.
36 */
37
38#include "dev/pci/pcireg.h"
39
40#include "dev/drm/drmP.h"
41
42/* Allocation of PCI memory resources (framebuffer, registers, etc.) for
43 * drm_get_resource_*. Note that they are not RF_ACTIVE, so there's no virtual
44 * address for accessing them. Cleaned up at unload.
45 */
46static int drm_alloc_resource(struct drm_device *dev, int resource)
47{
48 if (resource >= DRM_MAX_PCI_RESOURCE) {
49 DRM_ERROR("Resource %d too large\n", resource);
50 return 1;
51 }
52
53 DRM_UNLOCK();
54 if (dev->pcir[resource] != NULL) {
55 DRM_LOCK();
56 return 0;
57 }
58
59 dev->pcirid[resource] = PCIR_BAR(resource);
60 dev->pcir[resource] = bus_alloc_resource_any(dev->device,
61 SYS_RES_MEMORY, &dev->pcirid[resource], RF_SHAREABLE);
62 DRM_LOCK();
63
64 if (dev->pcir[resource] == NULL) {
65 DRM_ERROR("Couldn't find resource 0x%x\n", resource);
66 return 1;
67 }
68
69 return 0;
70}
71
72unsigned long drm_get_resource_start(struct drm_device *dev,
73 unsigned int resource)
74{
75 if (drm_alloc_resource(dev, resource) != 0)
76 return 0;
77
78 return rman_get_start(dev->pcir[resource]);
79}
80
81unsigned long drm_get_resource_len(struct drm_device *dev,
82 unsigned int resource)
83{
84 if (drm_alloc_resource(dev, resource) != 0)
85 return 0;
86
87 return rman_get_size(dev->pcir[resource]);
88}
89
90int drm_addmap(struct drm_device * dev, unsigned long offset,
91 unsigned long size,
92 enum drm_map_type type, enum drm_map_flags flags, drm_local_map_t **map_ptr)
93{
94 drm_local_map_t *map;
95 int align;
96 /*drm_agp_mem_t *entry;
97 int valid;*/
98
99 /* Only allow shared memory to be removable since we only keep enough
100 * book keeping information about shared memory to allow for removal
101 * when processes fork.
102 */
103 if ((flags & _DRM_REMOVABLE) && type != _DRM_SHM) {
104 DRM_ERROR("Requested removable map for non-DRM_SHM\n");
105 return EINVAL;
106 }
107 if ((offset & PAGE_MASK) || (size & PAGE_MASK)) {
108 DRM_ERROR("offset/size not page aligned: 0x%lx/0x%lx\n",
109 offset, size);
110 return EINVAL;
111 }
112 if (offset + size < offset) {
113 DRM_ERROR("offset and size wrap around: 0x%lx/0x%lx\n",
114 offset, size);
115 return EINVAL;
116 }
117
118 DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", offset,
119 size, type);
120
121 /* Check if this is just another version of a kernel-allocated map, and
122 * just hand that back if so.
123 */
124 if (type == _DRM_REGISTERS || type == _DRM_FRAME_BUFFER ||
125 type == _DRM_SHM) {
126 TAILQ_FOREACH(map, &dev->maplist, link) {
127 if (map->type == type && (map->offset == offset ||
128 (map->type == _DRM_SHM &&
129 map->flags == _DRM_CONTAINS_LOCK))) {
130 map->size = size;
131 DRM_DEBUG("Found kernel map %d\n", type);
132 goto done;
133 }
134 }
135 }
136 DRM_UNLOCK();
137
138 /* Allocate a new map structure, fill it in, and do any type-specific
139 * initialization necessary.
140 */
141 map = malloc(sizeof(*map), M_DRM, M_ZERO | M_NOWAIT);
141 map = malloc(sizeof(*map), DRM_MEM_MAPS, M_ZERO | M_NOWAIT);
142 if (!map) {
143 DRM_LOCK();
144 return ENOMEM;
145 }
146
147 map->offset = offset;
148 map->size = size;
149 map->type = type;
150 map->flags = flags;
151
152 switch (map->type) {
153 case _DRM_REGISTERS:
154 map->handle = drm_ioremap(dev, map);
155 if (!(map->flags & _DRM_WRITE_COMBINING))
156 break;
157 /* FALLTHROUGH */
158 case _DRM_FRAME_BUFFER:
159 if (drm_mtrr_add(map->offset, map->size, DRM_MTRR_WC) == 0)
160 map->mtrr = 1;
161 break;
162 case _DRM_SHM:
163 map->handle = malloc(map->size, M_DRM, M_NOWAIT);
163 map->handle = malloc(map->size, DRM_MEM_MAPS, M_NOWAIT);
164 DRM_DEBUG("%lu %d %p\n",
165 map->size, drm_order(map->size), map->handle);
166 if (!map->handle) {
167 free(map, M_DRM);
167 free(map, DRM_MEM_MAPS);
168 DRM_LOCK();
169 return ENOMEM;
170 }
171 map->offset = (unsigned long)map->handle;
172 if (map->flags & _DRM_CONTAINS_LOCK) {
173 /* Prevent a 2nd X Server from creating a 2nd lock */
174 DRM_LOCK();
175 if (dev->lock.hw_lock != NULL) {
176 DRM_UNLOCK();
177 free(map->handle, M_DRM);
178 free(map, M_DRM);
177 free(map->handle, DRM_MEM_MAPS);
178 free(map, DRM_MEM_MAPS);
179 return EBUSY;
180 }
181 dev->lock.hw_lock = map->handle; /* Pointer to lock */
182 DRM_UNLOCK();
183 }
184 break;
185 case _DRM_AGP:
186 /*valid = 0;*/
187 /* In some cases (i810 driver), user space may have already
188 * added the AGP base itself, because dev->agp->base previously
189 * only got set during AGP enable. So, only add the base
190 * address if the map's offset isn't already within the
191 * aperture.
192 */
193 if (map->offset < dev->agp->base ||
194 map->offset > dev->agp->base +
195 dev->agp->info.ai_aperture_size - 1) {
196 map->offset += dev->agp->base;
197 }
198 map->mtrr = dev->agp->mtrr; /* for getmap */
199 /*for (entry = dev->agp->memory; entry; entry = entry->next) {
200 if ((map->offset >= entry->bound) &&
201 (map->offset + map->size <=
202 entry->bound + entry->pages * PAGE_SIZE)) {
203 valid = 1;
204 break;
205 }
206 }
207 if (!valid) {
208 free(map, M_DRM);
208 free(map, DRM_MEM_MAPS);
209 DRM_LOCK();
210 return EACCES;
211 }*/
212 break;
213 case _DRM_SCATTER_GATHER:
214 if (!dev->sg) {
215 free(map, M_DRM);
215 free(map, DRM_MEM_MAPS);
216 DRM_LOCK();
217 return EINVAL;
218 }
219 map->offset = map->offset + dev->sg->handle;
220 break;
221 case _DRM_CONSISTENT:
222 /* Unfortunately, we don't get any alignment specification from
223 * the caller, so we have to guess. drm_pci_alloc requires
224 * a power-of-two alignment, so try to align the bus address of
225 * the map to it size if possible, otherwise just assume
226 * PAGE_SIZE alignment.
227 */
228 align = map->size;
229 if ((align & (align - 1)) != 0)
230 align = PAGE_SIZE;
231 map->dmah = drm_pci_alloc(dev, map->size, align, 0xfffffffful);
232 if (map->dmah == NULL) {
233 free(map, M_DRM);
233 free(map, DRM_MEM_MAPS);
234 DRM_LOCK();
235 return ENOMEM;
236 }
237 map->handle = map->dmah->vaddr;
238 map->offset = map->dmah->busaddr;
239 break;
240 default:
241 DRM_ERROR("Bad map type %d\n", map->type);
242 free(map, M_DRM);
242 free(map, DRM_MEM_MAPS);
243 DRM_LOCK();
244 return EINVAL;
245 }
246
247 DRM_LOCK();
248 TAILQ_INSERT_TAIL(&dev->maplist, map, link);
249
250done:
251 /* Jumped to, with lock held, when a kernel map is found. */
252
253 DRM_DEBUG("Added map %d 0x%lx/0x%lx\n", map->type, map->offset,
254 map->size);
255
256 *map_ptr = map;
257
258 return 0;
259}
260
261int drm_addmap_ioctl(struct drm_device *dev, void *data,
262 struct drm_file *file_priv)
263{
264 struct drm_map *request = data;
265 drm_local_map_t *map;
266 int err;
267
268 if (!(dev->flags & (FREAD|FWRITE)))
269 return EACCES; /* Require read/write */
270
271 if (!DRM_SUSER(DRM_CURPROC) && request->type != _DRM_AGP)
272 return EACCES;
273
274 DRM_LOCK();
275 err = drm_addmap(dev, request->offset, request->size, request->type,
276 request->flags, &map);
277 DRM_UNLOCK();
278 if (err != 0)
279 return err;
280
281 request->offset = map->offset;
282 request->size = map->size;
283 request->type = map->type;
284 request->flags = map->flags;
285 request->mtrr = map->mtrr;
286 request->handle = map->handle;
287
288 if (request->type != _DRM_SHM) {
289 request->handle = (void *)request->offset;
290 }
291
292 return 0;
293}
294
295void drm_rmmap(struct drm_device *dev, drm_local_map_t *map)
296{
297 DRM_SPINLOCK_ASSERT(&dev->dev_lock);
298
299 TAILQ_REMOVE(&dev->maplist, map, link);
300
301 switch (map->type) {
302 case _DRM_REGISTERS:
303 if (map->bsr == NULL)
304 drm_ioremapfree(map);
305 /* FALLTHROUGH */
306 case _DRM_FRAME_BUFFER:
307 if (map->mtrr) {
308 int __unused retcode;
309
310 retcode = drm_mtrr_del(0, map->offset, map->size,
311 DRM_MTRR_WC);
312 DRM_DEBUG("mtrr_del = %d\n", retcode);
313 }
314 break;
315 case _DRM_SHM:
316 free(map->handle, M_DRM);
316 free(map->handle, DRM_MEM_MAPS);
317 break;
318 case _DRM_AGP:
319 case _DRM_SCATTER_GATHER:
320 break;
321 case _DRM_CONSISTENT:
322 drm_pci_free(dev, map->dmah);
323 break;
324 default:
325 DRM_ERROR("Bad map type %d\n", map->type);
326 break;
327 }
328
329 if (map->bsr != NULL) {
330 bus_release_resource(dev->device, SYS_RES_MEMORY, map->rid,
331 map->bsr);
332 }
333
334 free(map, M_DRM);
334 free(map, DRM_MEM_MAPS);
335}
336
337/* Remove a map private from list and deallocate resources if the mapping
338 * isn't in use.
339 */
340
341int drm_rmmap_ioctl(struct drm_device *dev, void *data,
342 struct drm_file *file_priv)
343{
344 drm_local_map_t *map;
345 struct drm_map *request = data;
346
347 DRM_LOCK();
348 TAILQ_FOREACH(map, &dev->maplist, link) {
349 if (map->handle == request->handle &&
350 map->flags & _DRM_REMOVABLE)
351 break;
352 }
353
354 /* No match found. */
355 if (map == NULL) {
356 DRM_UNLOCK();
357 return EINVAL;
358 }
359
360 drm_rmmap(dev, map);
361
362 DRM_UNLOCK();
363
364 return 0;
365}
366
367
368static void drm_cleanup_buf_error(struct drm_device *dev,
369 drm_buf_entry_t *entry)
370{
371 int i;
372
373 if (entry->seg_count) {
374 for (i = 0; i < entry->seg_count; i++) {
375 drm_pci_free(dev, entry->seglist[i]);
376 }
377 free(entry->seglist, M_DRM);
377 free(entry->seglist, DRM_MEM_SEGS);
378
379 entry->seg_count = 0;
380 }
381
382 if (entry->buf_count) {
383 for (i = 0; i < entry->buf_count; i++) {
384 free(entry->buflist[i].dev_private, M_DRM);
384 free(entry->buflist[i].dev_private, DRM_MEM_BUFS);
385 }
386 free(entry->buflist, M_DRM);
386 free(entry->buflist, DRM_MEM_BUFS);
387
388 entry->buf_count = 0;
389 }
390}
391
392static int drm_do_addbufs_agp(struct drm_device *dev, struct drm_buf_desc *request)
393{
394 drm_device_dma_t *dma = dev->dma;
395 drm_buf_entry_t *entry;
396 /*drm_agp_mem_t *agp_entry;
397 int valid*/
398 drm_buf_t *buf;
399 unsigned long offset;
400 unsigned long agp_offset;
401 int count;
402 int order;
403 int size;
404 int alignment;
405 int page_order;
406 int total;
407 int byte_count;
408 int i;
409 drm_buf_t **temp_buflist;
410
411 count = request->count;
412 order = drm_order(request->size);
413 size = 1 << order;
414
415 alignment = (request->flags & _DRM_PAGE_ALIGN)
416 ? round_page(size) : size;
417 page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
418 total = PAGE_SIZE << page_order;
419
420 byte_count = 0;
421 agp_offset = dev->agp->base + request->agp_start;
422
423 DRM_DEBUG("count: %d\n", count);
424 DRM_DEBUG("order: %d\n", order);
425 DRM_DEBUG("size: %d\n", size);
426 DRM_DEBUG("agp_offset: 0x%lx\n", agp_offset);
427 DRM_DEBUG("alignment: %d\n", alignment);
428 DRM_DEBUG("page_order: %d\n", page_order);
429 DRM_DEBUG("total: %d\n", total);
430
431 /* Make sure buffers are located in AGP memory that we own */
432 /* Breaks MGA due to drm_alloc_agp not setting up entries for the
433 * memory. Safe to ignore for now because these ioctls are still
434 * root-only.
435 */
436 /*valid = 0;
437 for (agp_entry = dev->agp->memory; agp_entry;
438 agp_entry = agp_entry->next) {
439 if ((agp_offset >= agp_entry->bound) &&
440 (agp_offset + total * count <=
441 agp_entry->bound + agp_entry->pages * PAGE_SIZE)) {
442 valid = 1;
443 break;
444 }
445 }
446 if (!valid) {
447 DRM_DEBUG("zone invalid\n");
448 return EINVAL;
449 }*/
450
451 entry = &dma->bufs[order];
452
453 entry->buflist = malloc(count * sizeof(*entry->buflist), M_DRM,
453 entry->buflist = malloc(count * sizeof(*entry->buflist), DRM_MEM_BUFS,
454 M_NOWAIT | M_ZERO);
455 if (!entry->buflist) {
456 return ENOMEM;
457 }
458
459 entry->buf_size = size;
460 entry->page_order = page_order;
461
462 offset = 0;
463
464 while (entry->buf_count < count) {
465 buf = &entry->buflist[entry->buf_count];
466 buf->idx = dma->buf_count + entry->buf_count;
467 buf->total = alignment;
468 buf->order = order;
469 buf->used = 0;
470
471 buf->offset = (dma->byte_count + offset);
472 buf->bus_address = agp_offset + offset;
473 buf->address = (void *)(agp_offset + offset);
474 buf->next = NULL;
475 buf->pending = 0;
476 buf->file_priv = NULL;
477
478 buf->dev_priv_size = dev->driver->buf_priv_size;
479 buf->dev_private = malloc(buf->dev_priv_size, M_DRM,
479 buf->dev_private = malloc(buf->dev_priv_size, DRM_MEM_BUFS,
480 M_NOWAIT | M_ZERO);
481 if (buf->dev_private == NULL) {
482 /* Set count correctly so we free the proper amount. */
483 entry->buf_count = count;
484 drm_cleanup_buf_error(dev, entry);
485 return ENOMEM;
486 }
487
488 offset += alignment;
489 entry->buf_count++;
490 byte_count += PAGE_SIZE << page_order;
491 }
492
493 DRM_DEBUG("byte_count: %d\n", byte_count);
494
495 temp_buflist = realloc(dma->buflist,
496 (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist), M_DRM,
497 M_NOWAIT);
496 (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist),
497 DRM_MEM_BUFS, M_NOWAIT);
498 if (temp_buflist == NULL) {
499 /* Free the entry because it isn't valid */
500 drm_cleanup_buf_error(dev, entry);
501 return ENOMEM;
502 }
503 dma->buflist = temp_buflist;
504
505 for (i = 0; i < entry->buf_count; i++) {
506 dma->buflist[i + dma->buf_count] = &entry->buflist[i];
507 }
508
509 dma->buf_count += entry->buf_count;
510 dma->byte_count += byte_count;
511
512 DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
513 DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
514
515 request->count = entry->buf_count;
516 request->size = size;
517
518 dma->flags = _DRM_DMA_USE_AGP;
519
520 return 0;
521}
522
523static int drm_do_addbufs_pci(struct drm_device *dev, struct drm_buf_desc *request)
524{
525 drm_device_dma_t *dma = dev->dma;
526 int count;
527 int order;
528 int size;
529 int total;
530 int page_order;
531 drm_buf_entry_t *entry;
532 drm_buf_t *buf;
533 int alignment;
534 unsigned long offset;
535 int i;
536 int byte_count;
537 int page_count;
538 unsigned long *temp_pagelist;
539 drm_buf_t **temp_buflist;
540
541 count = request->count;
542 order = drm_order(request->size);
543 size = 1 << order;
544
545 DRM_DEBUG("count=%d, size=%d (%d), order=%d\n",
546 request->count, request->size, size, order);
547
548 alignment = (request->flags & _DRM_PAGE_ALIGN)
549 ? round_page(size) : size;
550 page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
551 total = PAGE_SIZE << page_order;
552
553 entry = &dma->bufs[order];
554
555 entry->buflist = malloc(count * sizeof(*entry->buflist), M_DRM,
555 entry->buflist = malloc(count * sizeof(*entry->buflist), DRM_MEM_BUFS,
556 M_NOWAIT | M_ZERO);
557 entry->seglist = malloc(count * sizeof(*entry->seglist), M_DRM,
557 entry->seglist = malloc(count * sizeof(*entry->seglist), DRM_MEM_SEGS,
558 M_NOWAIT | M_ZERO);
559
560 /* Keep the original pagelist until we know all the allocations
561 * have succeeded
562 */
563 temp_pagelist = malloc((dma->page_count + (count << page_order)) *
564 sizeof(*dma->pagelist), M_DRM, M_NOWAIT);
564 sizeof(*dma->pagelist), DRM_MEM_PAGES, M_NOWAIT);
565
566 if (entry->buflist == NULL || entry->seglist == NULL ||
567 temp_pagelist == NULL) {
568 free(temp_pagelist, M_DRM);
569 free(entry->seglist, M_DRM);
570 free(entry->buflist, M_DRM);
568 free(temp_pagelist, DRM_MEM_PAGES);
569 free(entry->seglist, DRM_MEM_SEGS);
570 free(entry->buflist, DRM_MEM_BUFS);
571 return ENOMEM;
572 }
573
574 memcpy(temp_pagelist, dma->pagelist, dma->page_count *
575 sizeof(*dma->pagelist));
576
577 DRM_DEBUG("pagelist: %d entries\n",
578 dma->page_count + (count << page_order));
579
580 entry->buf_size = size;
581 entry->page_order = page_order;
582 byte_count = 0;
583 page_count = 0;
584
585 while (entry->buf_count < count) {
586 DRM_SPINUNLOCK(&dev->dma_lock);
587 drm_dma_handle_t *dmah = drm_pci_alloc(dev, size, alignment,
588 0xfffffffful);
589 DRM_SPINLOCK(&dev->dma_lock);
590 if (dmah == NULL) {
591 /* Set count correctly so we free the proper amount. */
592 entry->buf_count = count;
593 entry->seg_count = count;
594 drm_cleanup_buf_error(dev, entry);
595 free(temp_pagelist, M_DRM);
595 free(temp_pagelist, DRM_MEM_PAGES);
596 return ENOMEM;
597 }
598
599 entry->seglist[entry->seg_count++] = dmah;
600 for (i = 0; i < (1 << page_order); i++) {
601 DRM_DEBUG("page %d @ %p\n",
602 dma->page_count + page_count,
603 (char *)dmah->vaddr + PAGE_SIZE * i);
604 temp_pagelist[dma->page_count + page_count++] =
605 (long)dmah->vaddr + PAGE_SIZE * i;
606 }
607 for (offset = 0;
608 offset + size <= total && entry->buf_count < count;
609 offset += alignment, ++entry->buf_count) {
610 buf = &entry->buflist[entry->buf_count];
611 buf->idx = dma->buf_count + entry->buf_count;
612 buf->total = alignment;
613 buf->order = order;
614 buf->used = 0;
615 buf->offset = (dma->byte_count + byte_count + offset);
616 buf->address = ((char *)dmah->vaddr + offset);
617 buf->bus_address = dmah->busaddr + offset;
618 buf->next = NULL;
619 buf->pending = 0;
620 buf->file_priv = NULL;
621
622 buf->dev_priv_size = dev->driver->buf_priv_size;
623 buf->dev_private = malloc(buf->dev_priv_size, M_DRM,
624 M_NOWAIT | M_ZERO);
623 buf->dev_private = malloc(buf->dev_priv_size,
624 DRM_MEM_BUFS, M_NOWAIT | M_ZERO);
625 if (buf->dev_private == NULL) {
626 /* Set count correctly so we free the proper amount. */
627 entry->buf_count = count;
628 entry->seg_count = count;
629 drm_cleanup_buf_error(dev, entry);
630 free(temp_pagelist, M_DRM);
630 free(temp_pagelist, DRM_MEM_PAGES);
631 return ENOMEM;
632 }
633
634 DRM_DEBUG("buffer %d @ %p\n",
635 entry->buf_count, buf->address);
636 }
637 byte_count += PAGE_SIZE << page_order;
638 }
639
640 temp_buflist = realloc(dma->buflist,
641 (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist), M_DRM,
642 M_NOWAIT);
641 (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist),
642 DRM_MEM_BUFS, M_NOWAIT);
643 if (temp_buflist == NULL) {
644 /* Free the entry because it isn't valid */
645 drm_cleanup_buf_error(dev, entry);
646 free(temp_pagelist, M_DRM);
646 free(temp_pagelist, DRM_MEM_PAGES);
647 return ENOMEM;
648 }
649 dma->buflist = temp_buflist;
650
651 for (i = 0; i < entry->buf_count; i++) {
652 dma->buflist[i + dma->buf_count] = &entry->buflist[i];
653 }
654
655 /* No allocations failed, so now we can replace the orginal pagelist
656 * with the new one.
657 */
658 free(dma->pagelist, M_DRM);
658 free(dma->pagelist, DRM_MEM_PAGES);
659 dma->pagelist = temp_pagelist;
660
661 dma->buf_count += entry->buf_count;
662 dma->seg_count += entry->seg_count;
663 dma->page_count += entry->seg_count << page_order;
664 dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
665
666 request->count = entry->buf_count;
667 request->size = size;
668
669 return 0;
670
671}
672
673static int drm_do_addbufs_sg(struct drm_device *dev, struct drm_buf_desc *request)
674{
675 drm_device_dma_t *dma = dev->dma;
676 drm_buf_entry_t *entry;
677 drm_buf_t *buf;
678 unsigned long offset;
679 unsigned long agp_offset;
680 int count;
681 int order;
682 int size;
683 int alignment;
684 int page_order;
685 int total;
686 int byte_count;
687 int i;
688 drm_buf_t **temp_buflist;
689
690 count = request->count;
691 order = drm_order(request->size);
692 size = 1 << order;
693
694 alignment = (request->flags & _DRM_PAGE_ALIGN)
695 ? round_page(size) : size;
696 page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
697 total = PAGE_SIZE << page_order;
698
699 byte_count = 0;
700 agp_offset = request->agp_start;
701
702 DRM_DEBUG("count: %d\n", count);
703 DRM_DEBUG("order: %d\n", order);
704 DRM_DEBUG("size: %d\n", size);
705 DRM_DEBUG("agp_offset: %ld\n", agp_offset);
706 DRM_DEBUG("alignment: %d\n", alignment);
707 DRM_DEBUG("page_order: %d\n", page_order);
708 DRM_DEBUG("total: %d\n", total);
709
710 entry = &dma->bufs[order];
711
712 entry->buflist = malloc(count * sizeof(*entry->buflist), M_DRM,
712 entry->buflist = malloc(count * sizeof(*entry->buflist), DRM_MEM_BUFS,
713 M_NOWAIT | M_ZERO);
714 if (entry->buflist == NULL)
715 return ENOMEM;
716
717 entry->buf_size = size;
718 entry->page_order = page_order;
719
720 offset = 0;
721
722 while (entry->buf_count < count) {
723 buf = &entry->buflist[entry->buf_count];
724 buf->idx = dma->buf_count + entry->buf_count;
725 buf->total = alignment;
726 buf->order = order;
727 buf->used = 0;
728
729 buf->offset = (dma->byte_count + offset);
730 buf->bus_address = agp_offset + offset;
731 buf->address = (void *)(agp_offset + offset + dev->sg->handle);
732 buf->next = NULL;
733 buf->pending = 0;
734 buf->file_priv = NULL;
735
736 buf->dev_priv_size = dev->driver->buf_priv_size;
737 buf->dev_private = malloc(buf->dev_priv_size, M_DRM,
737 buf->dev_private = malloc(buf->dev_priv_size, DRM_MEM_BUFS,
738 M_NOWAIT | M_ZERO);
739 if (buf->dev_private == NULL) {
740 /* Set count correctly so we free the proper amount. */
741 entry->buf_count = count;
742 drm_cleanup_buf_error(dev, entry);
743 return ENOMEM;
744 }
745
746 DRM_DEBUG("buffer %d @ %p\n",
747 entry->buf_count, buf->address);
748
749 offset += alignment;
750 entry->buf_count++;
751 byte_count += PAGE_SIZE << page_order;
752 }
753
754 DRM_DEBUG("byte_count: %d\n", byte_count);
755
756 temp_buflist = realloc(dma->buflist,
757 (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist), M_DRM,
758 M_NOWAIT);
757 (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist),
758 DRM_MEM_BUFS, M_NOWAIT);
759 if (temp_buflist == NULL) {
760 /* Free the entry because it isn't valid */
761 drm_cleanup_buf_error(dev, entry);
762 return ENOMEM;
763 }
764 dma->buflist = temp_buflist;
765
766 for (i = 0; i < entry->buf_count; i++) {
767 dma->buflist[i + dma->buf_count] = &entry->buflist[i];
768 }
769
770 dma->buf_count += entry->buf_count;
771 dma->byte_count += byte_count;
772
773 DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
774 DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
775
776 request->count = entry->buf_count;
777 request->size = size;
778
779 dma->flags = _DRM_DMA_USE_SG;
780
781 return 0;
782}
783
784int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc *request)
785{
786 int order, ret;
787
788 if (request->count < 0 || request->count > 4096)
789 return EINVAL;
790
791 order = drm_order(request->size);
792 if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
793 return EINVAL;
794
795 DRM_SPINLOCK(&dev->dma_lock);
796
797 /* No more allocations after first buffer-using ioctl. */
798 if (dev->buf_use != 0) {
799 DRM_SPINUNLOCK(&dev->dma_lock);
800 return EBUSY;
801 }
802 /* No more than one allocation per order */
803 if (dev->dma->bufs[order].buf_count != 0) {
804 DRM_SPINUNLOCK(&dev->dma_lock);
805 return ENOMEM;
806 }
807
808 ret = drm_do_addbufs_agp(dev, request);
809
810 DRM_SPINUNLOCK(&dev->dma_lock);
811
812 return ret;
813}
814
815int drm_addbufs_sg(struct drm_device *dev, struct drm_buf_desc *request)
816{
817 int order, ret;
818
819 if (!DRM_SUSER(DRM_CURPROC))
820 return EACCES;
821
822 if (request->count < 0 || request->count > 4096)
823 return EINVAL;
824
825 order = drm_order(request->size);
826 if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
827 return EINVAL;
828
829 DRM_SPINLOCK(&dev->dma_lock);
830
831 /* No more allocations after first buffer-using ioctl. */
832 if (dev->buf_use != 0) {
833 DRM_SPINUNLOCK(&dev->dma_lock);
834 return EBUSY;
835 }
836 /* No more than one allocation per order */
837 if (dev->dma->bufs[order].buf_count != 0) {
838 DRM_SPINUNLOCK(&dev->dma_lock);
839 return ENOMEM;
840 }
841
842 ret = drm_do_addbufs_sg(dev, request);
843
844 DRM_SPINUNLOCK(&dev->dma_lock);
845
846 return ret;
847}
848
849int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc *request)
850{
851 int order, ret;
852
853 if (!DRM_SUSER(DRM_CURPROC))
854 return EACCES;
855
856 if (request->count < 0 || request->count > 4096)
857 return EINVAL;
858
859 order = drm_order(request->size);
860 if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
861 return EINVAL;
862
863 DRM_SPINLOCK(&dev->dma_lock);
864
865 /* No more allocations after first buffer-using ioctl. */
866 if (dev->buf_use != 0) {
867 DRM_SPINUNLOCK(&dev->dma_lock);
868 return EBUSY;
869 }
870 /* No more than one allocation per order */
871 if (dev->dma->bufs[order].buf_count != 0) {
872 DRM_SPINUNLOCK(&dev->dma_lock);
873 return ENOMEM;
874 }
875
876 ret = drm_do_addbufs_pci(dev, request);
877
878 DRM_SPINUNLOCK(&dev->dma_lock);
879
880 return ret;
881}
882
883int drm_addbufs_ioctl(struct drm_device *dev, void *data,
884 struct drm_file *file_priv)
885{
886 struct drm_buf_desc *request = data;
887 int err;
888
889 if (request->flags & _DRM_AGP_BUFFER)
890 err = drm_addbufs_agp(dev, request);
891 else if (request->flags & _DRM_SG_BUFFER)
892 err = drm_addbufs_sg(dev, request);
893 else
894 err = drm_addbufs_pci(dev, request);
895
896 return err;
897}
898
899int drm_infobufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
900{
901 drm_device_dma_t *dma = dev->dma;
902 struct drm_buf_info *request = data;
903 int i;
904 int count;
905 int retcode = 0;
906
907 DRM_SPINLOCK(&dev->dma_lock);
908 ++dev->buf_use; /* Can't allocate more after this call */
909 DRM_SPINUNLOCK(&dev->dma_lock);
910
911 for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
912 if (dma->bufs[i].buf_count)
913 ++count;
914 }
915
916 DRM_DEBUG("count = %d\n", count);
917
918 if (request->count >= count) {
919 for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
920 if (dma->bufs[i].buf_count) {
921 struct drm_buf_desc from;
922
923 from.count = dma->bufs[i].buf_count;
924 from.size = dma->bufs[i].buf_size;
925 from.low_mark = dma->bufs[i].freelist.low_mark;
926 from.high_mark = dma->bufs[i].freelist.high_mark;
927
928 if (DRM_COPY_TO_USER(&request->list[count], &from,
929 sizeof(struct drm_buf_desc)) != 0) {
930 retcode = EFAULT;
931 break;
932 }
933
934 DRM_DEBUG("%d %d %d %d %d\n",
935 i, dma->bufs[i].buf_count,
936 dma->bufs[i].buf_size,
937 dma->bufs[i].freelist.low_mark,
938 dma->bufs[i].freelist.high_mark);
939 ++count;
940 }
941 }
942 }
943 request->count = count;
944
945 return retcode;
946}
947
948int drm_markbufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
949{
950 drm_device_dma_t *dma = dev->dma;
951 struct drm_buf_desc *request = data;
952 int order;
953
954 DRM_DEBUG("%d, %d, %d\n",
955 request->size, request->low_mark, request->high_mark);
956
957
958 order = drm_order(request->size);
959 if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ||
960 request->low_mark < 0 || request->high_mark < 0) {
961 return EINVAL;
962 }
963
964 DRM_SPINLOCK(&dev->dma_lock);
965 if (request->low_mark > dma->bufs[order].buf_count ||
966 request->high_mark > dma->bufs[order].buf_count) {
967 DRM_SPINUNLOCK(&dev->dma_lock);
968 return EINVAL;
969 }
970
971 dma->bufs[order].freelist.low_mark = request->low_mark;
972 dma->bufs[order].freelist.high_mark = request->high_mark;
973 DRM_SPINUNLOCK(&dev->dma_lock);
974
975 return 0;
976}
977
978int drm_freebufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
979{
980 drm_device_dma_t *dma = dev->dma;
981 struct drm_buf_free *request = data;
982 int i;
983 int idx;
984 drm_buf_t *buf;
985 int retcode = 0;
986
987 DRM_DEBUG("%d\n", request->count);
988
989 DRM_SPINLOCK(&dev->dma_lock);
990 for (i = 0; i < request->count; i++) {
991 if (DRM_COPY_FROM_USER(&idx, &request->list[i], sizeof(idx))) {
992 retcode = EFAULT;
993 break;
994 }
995 if (idx < 0 || idx >= dma->buf_count) {
996 DRM_ERROR("Index %d (of %d max)\n",
997 idx, dma->buf_count - 1);
998 retcode = EINVAL;
999 break;
1000 }
1001 buf = dma->buflist[idx];
1002 if (buf->file_priv != file_priv) {
1003 DRM_ERROR("Process %d freeing buffer not owned\n",
1004 DRM_CURRENTPID);
1005 retcode = EINVAL;
1006 break;
1007 }
1008 drm_free_buffer(dev, buf);
1009 }
1010 DRM_SPINUNLOCK(&dev->dma_lock);
1011
1012 return retcode;
1013}
1014
1015int drm_mapbufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
1016{
1017 drm_device_dma_t *dma = dev->dma;
1018 int retcode = 0;
1019 const int zero = 0;
1020 vm_offset_t address;
1021 struct vmspace *vms;
1022 vm_ooffset_t foff;
1023 vm_size_t size;
1024 vm_offset_t vaddr;
1025 struct drm_buf_map *request = data;
1026 int i;
1027
1028 vms = DRM_CURPROC->td_proc->p_vmspace;
1029
1030 DRM_SPINLOCK(&dev->dma_lock);
1031 dev->buf_use++; /* Can't allocate more after this call */
1032 DRM_SPINUNLOCK(&dev->dma_lock);
1033
1034 if (request->count < dma->buf_count)
1035 goto done;
1036
1037 if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) ||
1038 (drm_core_check_feature(dev, DRIVER_SG) &&
1039 (dma->flags & _DRM_DMA_USE_SG))) {
1040 drm_local_map_t *map = dev->agp_buffer_map;
1041
1042 if (map == NULL) {
1043 retcode = EINVAL;
1044 goto done;
1045 }
1046 size = round_page(map->size);
1047 foff = map->offset;
1048 } else {
1049 size = round_page(dma->byte_count),
1050 foff = 0;
1051 }
1052
1053 vaddr = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ);
1054#if __FreeBSD_version >= 600023
1055 retcode = vm_mmap(&vms->vm_map, &vaddr, size, PROT_READ | PROT_WRITE,
1056 VM_PROT_ALL, MAP_SHARED, OBJT_DEVICE, dev->devnode, foff);
1057#else
1058 retcode = vm_mmap(&vms->vm_map, &vaddr, size, PROT_READ | PROT_WRITE,
1059 VM_PROT_ALL, MAP_SHARED, SLIST_FIRST(&dev->devnode->si_hlist),
1060 foff);
1061#endif
1062 if (retcode)
1063 goto done;
1064
1065 request->virtual = (void *)vaddr;
1066
1067 for (i = 0; i < dma->buf_count; i++) {
1068 if (DRM_COPY_TO_USER(&request->list[i].idx,
1069 &dma->buflist[i]->idx, sizeof(request->list[0].idx))) {
1070 retcode = EFAULT;
1071 goto done;
1072 }
1073 if (DRM_COPY_TO_USER(&request->list[i].total,
1074 &dma->buflist[i]->total, sizeof(request->list[0].total))) {
1075 retcode = EFAULT;
1076 goto done;
1077 }
1078 if (DRM_COPY_TO_USER(&request->list[i].used, &zero,
1079 sizeof(zero))) {
1080 retcode = EFAULT;
1081 goto done;
1082 }
1083 address = vaddr + dma->buflist[i]->offset; /* *** */
1084 if (DRM_COPY_TO_USER(&request->list[i].address, &address,
1085 sizeof(address))) {
1086 retcode = EFAULT;
1087 goto done;
1088 }
1089 }
1090
1091 done:
1092 request->count = dma->buf_count;
1093
1094 DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode);
1095
1096 return retcode;
1097}
1098
1099/*
1100 * Compute order. Can be made faster.
1101 */
1102int drm_order(unsigned long size)
1103{
1104 int order;
1105
1106 if (size == 0)
1107 return 0;
1108
1109 order = ffsl(size) - 1;
1110 if (size & ~(1ul << order))
1111 ++order;
1112
1113 return order;
1114}