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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / gpu / drm / ttm / ttm_bo.c
blob3fc7ce050407812414f8f01648bb45030c246213
1 /**************************************************************************
2 *
3 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27 /*
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 */
30 /* Notes:
31 *
32 * We store bo pointer in drm_mm_node struct so we know which bo own a
33 * specific node. There is no protection on the pointer, thus to make
34 * sure things don't go berserk you have to access this pointer while
35 * holding the global lru lock and make sure anytime you free a node you
36 * reset the pointer to NULL.
37 */
38
39 #include "ttm/ttm_module.h"
40 #include "ttm/ttm_bo_driver.h"
41 #include "ttm/ttm_placement.h"
42 #include <linux/jiffies.h>
43 #include <linux/slab.h>
44 #include <linux/sched.h>
45 #include <linux/mm.h>
46 #include <linux/file.h>
47 #include <linux/module.h>
48
49 #define TTM_ASSERT_LOCKED(param)
50 #define TTM_DEBUG(fmt, arg...)
51 #define TTM_BO_HASH_ORDER 13
52
53 static int ttm_bo_setup_vm(struct ttm_buffer_object *bo);
54 static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
55 static void ttm_bo_global_kobj_release(struct kobject *kobj);
56
57 static struct attribute ttm_bo_count = {
58 .name = "bo_count",
59 .mode = S_IRUGO
60 };
61
62 static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type)
63 {
64 int i;
65
66 for (i = 0; i <= TTM_PL_PRIV5; i++)
67 if (flags & (1 << i)) {
68 *mem_type = i;
69 return 0;
70 }
71 return -EINVAL;
72 }
73
74 static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
75 {
76 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
77
78 printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type);
79 printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type);
80 printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags);
81 printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset);
82 printk(KERN_ERR TTM_PFX " size: %llu\n", man->size);
83 printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n",
84 man->available_caching);
85 printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n",
86 man->default_caching);
87 if (mem_type != TTM_PL_SYSTEM) {
88 spin_lock(&bdev->glob->lru_lock);
89 drm_mm_debug_table(&man->manager, TTM_PFX);
90 spin_unlock(&bdev->glob->lru_lock);
91 }
92 }
93
94 static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
95 struct ttm_placement *placement)
96 {
97 int i, ret, mem_type;
98
99 printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n",
100 bo, bo->mem.num_pages, bo->mem.size >> 10,
101 bo->mem.size >> 20);
102 for (i = 0; i < placement->num_placement; i++) {
103 ret = ttm_mem_type_from_flags(placement->placement[i],
104 &mem_type);
105 if (ret)
106 return;
107 printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n",
108 i, placement->placement[i], mem_type);
109 ttm_mem_type_debug(bo->bdev, mem_type);
110 }
111 }
112
113 static ssize_t ttm_bo_global_show(struct kobject *kobj,
114 struct attribute *attr,
115 char *buffer)
116 {
117 struct ttm_bo_global *glob =
118 container_of(kobj, struct ttm_bo_global, kobj);
119
120 return snprintf(buffer, PAGE_SIZE, "%lu\n",
121 (unsigned long) atomic_read(&glob->bo_count));
122 }
123
124 static struct attribute *ttm_bo_global_attrs[] = {
125 &ttm_bo_count,
126 NULL
127 };
128
129 static const struct sysfs_ops ttm_bo_global_ops = {
130 .show = &ttm_bo_global_show
131 };
132
133 static struct kobj_type ttm_bo_glob_kobj_type = {
134 .release = &ttm_bo_global_kobj_release,
135 .sysfs_ops = &ttm_bo_global_ops,
136 .default_attrs = ttm_bo_global_attrs
137 };
138
139
140 static inline uint32_t ttm_bo_type_flags(unsigned type)
141 {
142 return 1 << (type);
143 }
144
145 static void ttm_bo_release_list(struct kref *list_kref)
146 {
147 struct ttm_buffer_object *bo =
148 container_of(list_kref, struct ttm_buffer_object, list_kref);
149 struct ttm_bo_device *bdev = bo->bdev;
150
151 BUG_ON(atomic_read(&bo->list_kref.refcount));
152 BUG_ON(atomic_read(&bo->kref.refcount));
153 BUG_ON(atomic_read(&bo->cpu_writers));
154 BUG_ON(bo->sync_obj != NULL);
155 BUG_ON(bo->mem.mm_node != NULL);
156 BUG_ON(!list_empty(&bo->lru));
157 BUG_ON(!list_empty(&bo->ddestroy));
158
159 if (bo->ttm)
160 ttm_tt_destroy(bo->ttm);
161 atomic_dec(&bo->glob->bo_count);
162 if (bo->destroy)
163 bo->destroy(bo);
164 else {
165 ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size);
166 kfree(bo);
167 }
168 }
169
170 int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible)
171 {
172
173 if (interruptible) {
174 int ret = 0;
175
176 ret = wait_event_interruptible(bo->event_queue,
177 atomic_read(&bo->reserved) == 0);
178 if (unlikely(ret != 0))
179 return ret;
180 } else {
181 wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0);
182 }
183 return 0;
184 }
185 EXPORT_SYMBOL(ttm_bo_wait_unreserved);
186
187 static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
188 {
189 struct ttm_bo_device *bdev = bo->bdev;
190 struct ttm_mem_type_manager *man;
191
192 BUG_ON(!atomic_read(&bo->reserved));
193
194 if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
195
196 BUG_ON(!list_empty(&bo->lru));
197
198 man = &bdev->man[bo->mem.mem_type];
199 list_add_tail(&bo->lru, &man->lru);
200 kref_get(&bo->list_kref);
201
202 if (bo->ttm != NULL) {
203 list_add_tail(&bo->swap, &bo->glob->swap_lru);
204 kref_get(&bo->list_kref);
205 }
206 }
207 }
208
209 /**
210 * Call with the lru_lock held.
211 */
212
213 static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
214 {
215 int put_count = 0;
216
217 if (!list_empty(&bo->swap)) {
218 list_del_init(&bo->swap);
219 ++put_count;
220 }
221 if (!list_empty(&bo->lru)) {
222 list_del_init(&bo->lru);
223 ++put_count;
224 }
225
226 /*
227 * TODO: Add a driver hook to delete from
228 * driver-specific LRU's here.
229 */
230
231 return put_count;
232 }
233
234 int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
235 bool interruptible,
236 bool no_wait, bool use_sequence, uint32_t sequence)
237 {
238 struct ttm_bo_global *glob = bo->glob;
239 int ret;
240
241 while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
242 if (use_sequence && bo->seq_valid &&
243 (sequence - bo->val_seq < (1 << 31))) {
244 return -EAGAIN;
245 }
246
247 if (no_wait)
248 return -EBUSY;
249
250 spin_unlock(&glob->lru_lock);
251 ret = ttm_bo_wait_unreserved(bo, interruptible);
252 spin_lock(&glob->lru_lock);
253
254 if (unlikely(ret))
255 return ret;
256 }
257
258 if (use_sequence) {
259 bo->val_seq = sequence;
260 bo->seq_valid = true;
261 } else {
262 bo->seq_valid = false;
263 }
264
265 return 0;
266 }
267 EXPORT_SYMBOL(ttm_bo_reserve);
268
269 static void ttm_bo_ref_bug(struct kref *list_kref)
270 {
271 BUG();
272 }
273
274 int ttm_bo_reserve(struct ttm_buffer_object *bo,
275 bool interruptible,
276 bool no_wait, bool use_sequence, uint32_t sequence)
277 {
278 struct ttm_bo_global *glob = bo->glob;
279 int put_count = 0;
280 int ret;
281
282 spin_lock(&glob->lru_lock);
283 ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence,
284 sequence);
285 if (likely(ret == 0))
286 put_count = ttm_bo_del_from_lru(bo);
287 spin_unlock(&glob->lru_lock);
288
289 while (put_count--)
290 kref_put(&bo->list_kref, ttm_bo_ref_bug);
291
292 return ret;
293 }
294
295 void ttm_bo_unreserve(struct ttm_buffer_object *bo)
296 {
297 struct ttm_bo_global *glob = bo->glob;
298
299 spin_lock(&glob->lru_lock);
300 ttm_bo_add_to_lru(bo);
301 atomic_set(&bo->reserved, 0);
302 wake_up_all(&bo->event_queue);
303 spin_unlock(&glob->lru_lock);
304 }
305 EXPORT_SYMBOL(ttm_bo_unreserve);
306
307 /*
308 * Call bo->mutex locked.
309 */
310 static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
311 {
312 struct ttm_bo_device *bdev = bo->bdev;
313 struct ttm_bo_global *glob = bo->glob;
314 int ret = 0;
315 uint32_t page_flags = 0;
316
317 TTM_ASSERT_LOCKED(&bo->mutex);
318 bo->ttm = NULL;
319
320 if (bdev->need_dma32)
321 page_flags |= TTM_PAGE_FLAG_DMA32;
322
323 switch (bo->type) {
324 case ttm_bo_type_device:
325 if (zero_alloc)
326 page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
327 case ttm_bo_type_kernel:
328 bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
329 page_flags, glob->dummy_read_page);
330 if (unlikely(bo->ttm == NULL))
331 ret = -ENOMEM;
332 break;
333 case ttm_bo_type_user:
334 bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
335 page_flags | TTM_PAGE_FLAG_USER,
336 glob->dummy_read_page);
337 if (unlikely(bo->ttm == NULL)) {
338 ret = -ENOMEM;
339 break;
340 }
341
342 ret = ttm_tt_set_user(bo->ttm, current,
343 bo->buffer_start, bo->num_pages);
344 if (unlikely(ret != 0))
345 ttm_tt_destroy(bo->ttm);
346 break;
347 default:
348 printk(KERN_ERR TTM_PFX "Illegal buffer object type\n");
349 ret = -EINVAL;
350 break;
351 }
352
353 return ret;
354 }
355
356 static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
357 struct ttm_mem_reg *mem,
358 bool evict, bool interruptible,
359 bool no_wait_reserve, bool no_wait_gpu)
360 {
361 struct ttm_bo_device *bdev = bo->bdev;
362 bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
363 bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
364 struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
365 struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
366 int ret = 0;
367
368 if (old_is_pci || new_is_pci ||
369 ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0))
370 ttm_bo_unmap_virtual(bo);
371
372 /*
373 * Create and bind a ttm if required.
374 */
375
376 if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) {
377 ret = ttm_bo_add_ttm(bo, false);
378 if (ret)
379 goto out_err;
380
381 ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
382 if (ret)
383 goto out_err;
384
385 if (mem->mem_type != TTM_PL_SYSTEM) {
386 ret = ttm_tt_bind(bo->ttm, mem);
387 if (ret)
388 goto out_err;
389 }
390
391 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
392 bo->mem = *mem;
393 mem->mm_node = NULL;
394 goto moved;
395 }
396
397 }
398
399 if (bdev->driver->move_notify)
400 bdev->driver->move_notify(bo, mem);
401
402 if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
403 !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
404 ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem);
405 else if (bdev->driver->move)
406 ret = bdev->driver->move(bo, evict, interruptible,
407 no_wait_reserve, no_wait_gpu, mem);
408 else
409 ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem);
410
411 if (ret)
412 goto out_err;
413
414 moved:
415 if (bo->evicted) {
416 ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
417 if (ret)
418 printk(KERN_ERR TTM_PFX "Can not flush read caches\n");
419 bo->evicted = false;
420 }
421
422 if (bo->mem.mm_node) {
423 spin_lock(&bo->lock);
424 bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) +
425 bdev->man[bo->mem.mem_type].gpu_offset;
426 bo->cur_placement = bo->mem.placement;
427 spin_unlock(&bo->lock);
428 } else
429 bo->offset = 0;
430
431 return 0;
432
433 out_err:
434 new_man = &bdev->man[bo->mem.mem_type];
435 if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
436 ttm_tt_unbind(bo->ttm);
437 ttm_tt_destroy(bo->ttm);
438 bo->ttm = NULL;
439 }
440
441 return ret;
442 }
443
444 /**
445 * Call bo::reserved and with the lru lock held.
446 * Will release GPU memory type usage on destruction.
447 * This is the place to put in driver specific hooks.
448 * Will release the bo::reserved lock and the
449 * lru lock on exit.
450 */
451
452 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
453 {
454 struct ttm_bo_global *glob = bo->glob;
455
456 if (bo->ttm) {
457
458 /**
459 * Release the lru_lock, since we don't want to have
460 * an atomic requirement on ttm_tt[unbind|destroy].
461 */
462
463 spin_unlock(&glob->lru_lock);
464 ttm_tt_unbind(bo->ttm);
465 ttm_tt_destroy(bo->ttm);
466 bo->ttm = NULL;
467 spin_lock(&glob->lru_lock);
468 }
469
470 if (bo->mem.mm_node) {
471 drm_mm_put_block(bo->mem.mm_node);
472 bo->mem.mm_node = NULL;
473 }
474
475 atomic_set(&bo->reserved, 0);
476 wake_up_all(&bo->event_queue);
477 spin_unlock(&glob->lru_lock);
478 }
479
480
481 /**
482 * If bo idle, remove from delayed- and lru lists, and unref.
483 * If not idle, and already on delayed list, do nothing.
484 * If not idle, and not on delayed list, put on delayed list,
485 * up the list_kref and schedule a delayed list check.
486 */
487
488 static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
489 {
490 struct ttm_bo_device *bdev = bo->bdev;
491 struct ttm_bo_global *glob = bo->glob;
492 struct ttm_bo_driver *driver = bdev->driver;
493 int ret;
494
495 spin_lock(&bo->lock);
496 retry:
497 (void) ttm_bo_wait(bo, false, false, !remove_all);
498
499 if (!bo->sync_obj) {
500 int put_count;
501
502 spin_unlock(&bo->lock);
503
504 spin_lock(&glob->lru_lock);
505 ret = ttm_bo_reserve_locked(bo, false, !remove_all, false, 0);
506
507 /**
508 * Someone else has the object reserved. Bail and retry.
509 */
510
511 if (unlikely(ret == -EBUSY)) {
512 spin_unlock(&glob->lru_lock);
513 spin_lock(&bo->lock);
514 goto requeue;
515 }
516
517 /**
518 * We can re-check for sync object without taking
519 * the bo::lock since setting the sync object requires
520 * also bo::reserved. A busy object at this point may
521 * be caused by another thread starting an accelerated
522 * eviction.
523 */
524
525 if (unlikely(bo->sync_obj)) {
526 atomic_set(&bo->reserved, 0);
527 wake_up_all(&bo->event_queue);
528 spin_unlock(&glob->lru_lock);
529 spin_lock(&bo->lock);
530 if (remove_all)
531 goto retry;
532 else
533 goto requeue;
534 }
535
536 put_count = ttm_bo_del_from_lru(bo);
537
538 if (!list_empty(&bo->ddestroy)) {
539 list_del_init(&bo->ddestroy);
540 ++put_count;
541 }
542
543 ttm_bo_cleanup_memtype_use(bo);
544
545 while (put_count--)
546 kref_put(&bo->list_kref, ttm_bo_ref_bug);
547
548 return 0;
549 }
550 requeue:
551 spin_lock(&glob->lru_lock);
552 if (list_empty(&bo->ddestroy)) {
553 void *sync_obj = bo->sync_obj;
554 void *sync_obj_arg = bo->sync_obj_arg;
555
556 kref_get(&bo->list_kref);
557 list_add_tail(&bo->ddestroy, &bdev->ddestroy);
558 spin_unlock(&glob->lru_lock);
559 spin_unlock(&bo->lock);
560
561 if (sync_obj)
562 driver->sync_obj_flush(sync_obj, sync_obj_arg);
563 schedule_delayed_work(&bdev->wq,
564 ((HZ / 100) < 1) ? 1 : HZ / 100);
565 ret = 0;
566
567 } else {
568 spin_unlock(&glob->lru_lock);
569 spin_unlock(&bo->lock);
570 ret = -EBUSY;
571 }
572
573 return ret;
574 }
575
576 /**
577 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
578 * encountered buffers.
579 */
580
581 static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
582 {
583 struct ttm_bo_global *glob = bdev->glob;
584 struct ttm_buffer_object *entry = NULL;
585 int ret = 0;
586
587 spin_lock(&glob->lru_lock);
588 if (list_empty(&bdev->ddestroy))
589 goto out_unlock;
590
591 entry = list_first_entry(&bdev->ddestroy,
592 struct ttm_buffer_object, ddestroy);
593 kref_get(&entry->list_kref);
594
595 for (;;) {
596 struct ttm_buffer_object *nentry = NULL;
597
598 if (entry->ddestroy.next != &bdev->ddestroy) {
599 nentry = list_first_entry(&entry->ddestroy,
600 struct ttm_buffer_object, ddestroy);
601 kref_get(&nentry->list_kref);
602 }
603
604 spin_unlock(&glob->lru_lock);
605 ret = ttm_bo_cleanup_refs(entry, remove_all);
606 kref_put(&entry->list_kref, ttm_bo_release_list);
607 entry = nentry;
608
609 if (ret || !entry)
610 goto out;
611
612 spin_lock(&glob->lru_lock);
613 if (list_empty(&entry->ddestroy))
614 break;
615 }
616
617 out_unlock:
618 spin_unlock(&glob->lru_lock);
619 out:
620 if (entry)
621 kref_put(&entry->list_kref, ttm_bo_release_list);
622 return ret;
623 }
624
625 static void ttm_bo_delayed_workqueue(struct work_struct *work)
626 {
627 struct ttm_bo_device *bdev =
628 container_of(work, struct ttm_bo_device, wq.work);
629
630 if (ttm_bo_delayed_delete(bdev, false)) {
631 schedule_delayed_work(&bdev->wq,
632 ((HZ / 100) < 1) ? 1 : HZ / 100);
633 }
634 }
635
636 static void ttm_bo_release(struct kref *kref)
637 {
638 struct ttm_buffer_object *bo =
639 container_of(kref, struct ttm_buffer_object, kref);
640 struct ttm_bo_device *bdev = bo->bdev;
641
642 if (likely(bo->vm_node != NULL)) {
643 rb_erase(&bo->vm_rb, &bdev->addr_space_rb);
644 drm_mm_put_block(bo->vm_node);
645 bo->vm_node = NULL;
646 }
647 write_unlock(&bdev->vm_lock);
648 ttm_bo_cleanup_refs(bo, false);
649 kref_put(&bo->list_kref, ttm_bo_release_list);
650 write_lock(&bdev->vm_lock);
651 }
652
653 void ttm_bo_unref(struct ttm_buffer_object **p_bo)
654 {
655 struct ttm_buffer_object *bo = *p_bo;
656 struct ttm_bo_device *bdev = bo->bdev;
657
658 *p_bo = NULL;
659 write_lock(&bdev->vm_lock);
660 kref_put(&bo->kref, ttm_bo_release);
661 write_unlock(&bdev->vm_lock);
662 }
663 EXPORT_SYMBOL(ttm_bo_unref);
664
665 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
666 {
667 return cancel_delayed_work_sync(&bdev->wq);
668 }
669 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
670
671 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
672 {
673 if (resched)
674 schedule_delayed_work(&bdev->wq,
675 ((HZ / 100) < 1) ? 1 : HZ / 100);
676 }
677 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
678
679 static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
680 bool no_wait_reserve, bool no_wait_gpu)
681 {
682 struct ttm_bo_device *bdev = bo->bdev;
683 struct ttm_bo_global *glob = bo->glob;
684 struct ttm_mem_reg evict_mem;
685 struct ttm_placement placement;
686 int ret = 0;
687
688 spin_lock(&bo->lock);
689 ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
690 spin_unlock(&bo->lock);
691
692 if (unlikely(ret != 0)) {
693 if (ret != -ERESTARTSYS) {
694 printk(KERN_ERR TTM_PFX
695 "Failed to expire sync object before "
696 "buffer eviction.\n");
697 }
698 goto out;
699 }
700
701 BUG_ON(!atomic_read(&bo->reserved));
702
703 evict_mem = bo->mem;
704 evict_mem.mm_node = NULL;
705 evict_mem.bus.io_reserved = false;
706
707 placement.fpfn = 0;
708 placement.lpfn = 0;
709 placement.num_placement = 0;
710 placement.num_busy_placement = 0;
711 bdev->driver->evict_flags(bo, &placement);
712 ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
713 no_wait_reserve, no_wait_gpu);
714 if (ret) {
715 if (ret != -ERESTARTSYS) {
716 printk(KERN_ERR TTM_PFX
717 "Failed to find memory space for "
718 "buffer 0x%p eviction.\n", bo);
719 ttm_bo_mem_space_debug(bo, &placement);
720 }
721 goto out;
722 }
723
724 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
725 no_wait_reserve, no_wait_gpu);
726 if (ret) {
727 if (ret != -ERESTARTSYS)
728 printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
729 spin_lock(&glob->lru_lock);
730 if (evict_mem.mm_node) {
731 drm_mm_put_block(evict_mem.mm_node);
732 evict_mem.mm_node = NULL;
733 }
734 spin_unlock(&glob->lru_lock);
735 goto out;
736 }
737 bo->evicted = true;
738 out:
739 return ret;
740 }
741
742 static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
743 uint32_t mem_type,
744 bool interruptible, bool no_wait_reserve,
745 bool no_wait_gpu)
746 {
747 struct ttm_bo_global *glob = bdev->glob;
748 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
749 struct ttm_buffer_object *bo;
750 int ret, put_count = 0;
751
752 retry:
753 spin_lock(&glob->lru_lock);
754 if (list_empty(&man->lru)) {
755 spin_unlock(&glob->lru_lock);
756 return -EBUSY;
757 }
758
759 bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru);
760 kref_get(&bo->list_kref);
761
762 ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0);
763
764 if (unlikely(ret == -EBUSY)) {
765 spin_unlock(&glob->lru_lock);
766 if (likely(!no_wait_gpu))
767 ret = ttm_bo_wait_unreserved(bo, interruptible);
768
769 kref_put(&bo->list_kref, ttm_bo_release_list);
770
771 /**
772 * We *need* to retry after releasing the lru lock.
773 */
774
775 if (unlikely(ret != 0))
776 return ret;
777 goto retry;
778 }
779
780 put_count = ttm_bo_del_from_lru(bo);
781 spin_unlock(&glob->lru_lock);
782
783 BUG_ON(ret != 0);
784
785 while (put_count--)
786 kref_put(&bo->list_kref, ttm_bo_ref_bug);
787
788 ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu);
789 ttm_bo_unreserve(bo);
790
791 kref_put(&bo->list_kref, ttm_bo_release_list);
792 return ret;
793 }
794
795 static int ttm_bo_man_get_node(struct ttm_buffer_object *bo,
796 struct ttm_mem_type_manager *man,
797 struct ttm_placement *placement,
798 struct ttm_mem_reg *mem,
799 struct drm_mm_node **node)
800 {
801 struct ttm_bo_global *glob = bo->glob;
802 unsigned long lpfn;
803 int ret;
804
805 lpfn = placement->lpfn;
806 if (!lpfn)
807 lpfn = man->size;
808 *node = NULL;
809 do {
810 ret = drm_mm_pre_get(&man->manager);
811 if (unlikely(ret))
812 return ret;
813
814 spin_lock(&glob->lru_lock);
815 *node = drm_mm_search_free_in_range(&man->manager,
816 mem->num_pages, mem->page_alignment,
817 placement->fpfn, lpfn, 1);
818 if (unlikely(*node == NULL)) {
819 spin_unlock(&glob->lru_lock);
820 return 0;
821 }
822 *node = drm_mm_get_block_atomic_range(*node, mem->num_pages,
823 mem->page_alignment,
824 placement->fpfn,
825 lpfn);
826 spin_unlock(&glob->lru_lock);
827 } while (*node == NULL);
828 return 0;
829 }
830
831 /**
832 * Repeatedly evict memory from the LRU for @mem_type until we create enough
833 * space, or we've evicted everything and there isn't enough space.
834 */
835 static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
836 uint32_t mem_type,
837 struct ttm_placement *placement,
838 struct ttm_mem_reg *mem,
839 bool interruptible,
840 bool no_wait_reserve,
841 bool no_wait_gpu)
842 {
843 struct ttm_bo_device *bdev = bo->bdev;
844 struct ttm_bo_global *glob = bdev->glob;
845 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
846 struct drm_mm_node *node;
847 int ret;
848
849 do {
850 ret = ttm_bo_man_get_node(bo, man, placement, mem, &node);
851 if (unlikely(ret != 0))
852 return ret;
853 if (node)
854 break;
855 spin_lock(&glob->lru_lock);
856 if (list_empty(&man->lru)) {
857 spin_unlock(&glob->lru_lock);
858 break;
859 }
860 spin_unlock(&glob->lru_lock);
861 ret = ttm_mem_evict_first(bdev, mem_type, interruptible,
862 no_wait_reserve, no_wait_gpu);
863 if (unlikely(ret != 0))
864 return ret;
865 } while (1);
866 if (node == NULL)
867 return -ENOMEM;
868 mem->mm_node = node;
869 mem->mem_type = mem_type;
870 return 0;
871 }
872
873 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
874 uint32_t cur_placement,
875 uint32_t proposed_placement)
876 {
877 uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
878 uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
879
880 /**
881 * Keep current caching if possible.
882 */
883
884 if ((cur_placement & caching) != 0)
885 result |= (cur_placement & caching);
886 else if ((man->default_caching & caching) != 0)
887 result |= man->default_caching;
888 else if ((TTM_PL_FLAG_CACHED & caching) != 0)
889 result |= TTM_PL_FLAG_CACHED;
890 else if ((TTM_PL_FLAG_WC & caching) != 0)
891 result |= TTM_PL_FLAG_WC;
892 else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
893 result |= TTM_PL_FLAG_UNCACHED;
894
895 return result;
896 }
897
898 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
899 bool disallow_fixed,
900 uint32_t mem_type,
901 uint32_t proposed_placement,
902 uint32_t *masked_placement)
903 {
904 uint32_t cur_flags = ttm_bo_type_flags(mem_type);
905
906 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed)
907 return false;
908
909 if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0)
910 return false;
911
912 if ((proposed_placement & man->available_caching) == 0)
913 return false;
914
915 cur_flags |= (proposed_placement & man->available_caching);
916
917 *masked_placement = cur_flags;
918 return true;
919 }
920
921 /**
922 * Creates space for memory region @mem according to its type.
923 *
924 * This function first searches for free space in compatible memory types in
925 * the priority order defined by the driver. If free space isn't found, then
926 * ttm_bo_mem_force_space is attempted in priority order to evict and find
927 * space.
928 */
929 int ttm_bo_mem_space(struct ttm_buffer_object *bo,
930 struct ttm_placement *placement,
931 struct ttm_mem_reg *mem,
932 bool interruptible, bool no_wait_reserve,
933 bool no_wait_gpu)
934 {
935 struct ttm_bo_device *bdev = bo->bdev;
936 struct ttm_mem_type_manager *man;
937 uint32_t mem_type = TTM_PL_SYSTEM;
938 uint32_t cur_flags = 0;
939 bool type_found = false;
940 bool type_ok = false;
941 bool has_erestartsys = false;
942 struct drm_mm_node *node = NULL;
943 int i, ret;
944
945 mem->mm_node = NULL;
946 for (i = 0; i < placement->num_placement; ++i) {
947 ret = ttm_mem_type_from_flags(placement->placement[i],
948 &mem_type);
949 if (ret)
950 return ret;
951 man = &bdev->man[mem_type];
952
953 type_ok = ttm_bo_mt_compatible(man,
954 bo->type == ttm_bo_type_user,
955 mem_type,
956 placement->placement[i],
957 &cur_flags);
958
959 if (!type_ok)
960 continue;
961
962 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
963 cur_flags);
964 /*
965 * Use the access and other non-mapping-related flag bits from
966 * the memory placement flags to the current flags
967 */
968 ttm_flag_masked(&cur_flags, placement->placement[i],
969 ~TTM_PL_MASK_MEMTYPE);
970
971 if (mem_type == TTM_PL_SYSTEM)
972 break;
973
974 if (man->has_type && man->use_type) {
975 type_found = true;
976 ret = ttm_bo_man_get_node(bo, man, placement, mem,
977 &node);
978 if (unlikely(ret))
979 return ret;
980 }
981 if (node)
982 break;
983 }
984
985 if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) {
986 mem->mm_node = node;
987 mem->mem_type = mem_type;
988 mem->placement = cur_flags;
989 return 0;
990 }
991
992 if (!type_found)
993 return -EINVAL;
994
995 for (i = 0; i < placement->num_busy_placement; ++i) {
996 ret = ttm_mem_type_from_flags(placement->busy_placement[i],
997 &mem_type);
998 if (ret)
999 return ret;
1000 man = &bdev->man[mem_type];
1001 if (!man->has_type)
1002 continue;
1003 if (!ttm_bo_mt_compatible(man,
1004 bo->type == ttm_bo_type_user,
1005 mem_type,
1006 placement->busy_placement[i],
1007 &cur_flags))
1008 continue;
1009
1010 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
1011 cur_flags);
1012 /*
1013 * Use the access and other non-mapping-related flag bits from
1014 * the memory placement flags to the current flags
1015 */
1016 ttm_flag_masked(&cur_flags, placement->busy_placement[i],
1017 ~TTM_PL_MASK_MEMTYPE);
1018
1019
1020 if (mem_type == TTM_PL_SYSTEM) {
1021 mem->mem_type = mem_type;
1022 mem->placement = cur_flags;
1023 mem->mm_node = NULL;
1024 return 0;
1025 }
1026
1027 ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,
1028 interruptible, no_wait_reserve, no_wait_gpu);
1029 if (ret == 0 && mem->mm_node) {
1030 mem->placement = cur_flags;
1031 return 0;
1032 }
1033 if (ret == -ERESTARTSYS)
1034 has_erestartsys = true;
1035 }
1036 ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
1037 return ret;
1038 }
1039 EXPORT_SYMBOL(ttm_bo_mem_space);
1040
1041 int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait)
1042 {
1043 if ((atomic_read(&bo->cpu_writers) > 0) && no_wait)
1044 return -EBUSY;
1045
1046 return wait_event_interruptible(bo->event_queue,
1047 atomic_read(&bo->cpu_writers) == 0);
1048 }
1049 EXPORT_SYMBOL(ttm_bo_wait_cpu);
1050
1051 int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
1052 struct ttm_placement *placement,
1053 bool interruptible, bool no_wait_reserve,
1054 bool no_wait_gpu)
1055 {
1056 struct ttm_bo_global *glob = bo->glob;
1057 int ret = 0;
1058 struct ttm_mem_reg mem;
1059
1060 BUG_ON(!atomic_read(&bo->reserved));
1061
1062 spin_lock(&bo->lock);
1063 ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
1064 spin_unlock(&bo->lock);
1065 if (ret)
1066 return ret;
1067 mem.num_pages = bo->num_pages;
1068 mem.size = mem.num_pages << PAGE_SHIFT;
1069 mem.page_alignment = bo->mem.page_alignment;
1070 mem.bus.io_reserved = false;
1071 /*
1072 * Determine where to move the buffer.
1073 */
1074 ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu);
1075 if (ret)
1076 goto out_unlock;
1077 ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu);
1078 out_unlock:
1079 if (ret && mem.mm_node) {
1080 spin_lock(&glob->lru_lock);
1081 drm_mm_put_block(mem.mm_node);
1082 spin_unlock(&glob->lru_lock);
1083 }
1084 return ret;
1085 }
1086
1087 static int ttm_bo_mem_compat(struct ttm_placement *placement,
1088 struct ttm_mem_reg *mem)
1089 {
1090 int i;
1091 struct drm_mm_node *node = mem->mm_node;
1092
1093 if (node && placement->lpfn != 0 &&
1094 (node->start < placement->fpfn ||
1095 node->start + node->size > placement->lpfn))
1096 return -1;
1097
1098 for (i = 0; i < placement->num_placement; i++) {
1099 if ((placement->placement[i] & mem->placement &
1100 TTM_PL_MASK_CACHING) &&
1101 (placement->placement[i] & mem->placement &
1102 TTM_PL_MASK_MEM))
1103 return i;
1104 }
1105 return -1;
1106 }
1107
1108 int ttm_bo_validate(struct ttm_buffer_object *bo,
1109 struct ttm_placement *placement,
1110 bool interruptible, bool no_wait_reserve,
1111 bool no_wait_gpu)
1112 {
1113 int ret;
1114
1115 BUG_ON(!atomic_read(&bo->reserved));
1116 /* Check that range is valid */
1117 if (placement->lpfn || placement->fpfn)
1118 if (placement->fpfn > placement->lpfn ||
1119 (placement->lpfn - placement->fpfn) < bo->num_pages)
1120 return -EINVAL;
1121 /*
1122 * Check whether we need to move buffer.
1123 */
1124 ret = ttm_bo_mem_compat(placement, &bo->mem);
1125 if (ret < 0) {
1126 ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu);
1127 if (ret)
1128 return ret;
1129 } else {
1130 /*
1131 * Use the access and other non-mapping-related flag bits from
1132 * the compatible memory placement flags to the active flags
1133 */
1134 ttm_flag_masked(&bo->mem.placement, placement->placement[ret],
1135 ~TTM_PL_MASK_MEMTYPE);
1136 }
1137 /*
1138 * We might need to add a TTM.
1139 */
1140 if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1141 ret = ttm_bo_add_ttm(bo, true);
1142 if (ret)
1143 return ret;
1144 }
1145 return 0;
1146 }
1147 EXPORT_SYMBOL(ttm_bo_validate);
1148
1149 int ttm_bo_check_placement(struct ttm_buffer_object *bo,
1150 struct ttm_placement *placement)
1151 {
1152 int i;
1153
1154 if (placement->fpfn || placement->lpfn) {
1155 if (bo->mem.num_pages > (placement->lpfn - placement->fpfn)) {
1156 printk(KERN_ERR TTM_PFX "Page number range to small "
1157 "Need %lu pages, range is [%u, %u]\n",
1158 bo->mem.num_pages, placement->fpfn,
1159 placement->lpfn);
1160 return -EINVAL;
1161 }
1162 }
1163 for (i = 0; i < placement->num_placement; i++) {
1164 if (!capable(CAP_SYS_ADMIN)) {
1165 if (placement->placement[i] & TTM_PL_FLAG_NO_EVICT) {
1166 printk(KERN_ERR TTM_PFX "Need to be root to "
1167 "modify NO_EVICT status.\n");
1168 return -EINVAL;
1169 }
1170 }
1171 }
1172 for (i = 0; i < placement->num_busy_placement; i++) {
1173 if (!capable(CAP_SYS_ADMIN)) {
1174 if (placement->busy_placement[i] & TTM_PL_FLAG_NO_EVICT) {
1175 printk(KERN_ERR TTM_PFX "Need to be root to "
1176 "modify NO_EVICT status.\n");
1177 return -EINVAL;
1178 }
1179 }
1180 }
1181 return 0;
1182 }
1183
1184 int ttm_bo_init(struct ttm_bo_device *bdev,
1185 struct ttm_buffer_object *bo,
1186 unsigned long size,
1187 enum ttm_bo_type type,
1188 struct ttm_placement *placement,
1189 uint32_t page_alignment,
1190 unsigned long buffer_start,
1191 bool interruptible,
1192 struct file *persistant_swap_storage,
1193 size_t acc_size,
1194 void (*destroy) (struct ttm_buffer_object *))
1195 {
1196 int ret = 0;
1197 unsigned long num_pages;
1198
1199 size += buffer_start & ~PAGE_MASK;
1200 num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1201 if (num_pages == 0) {
1202 printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n");
1203 return -EINVAL;
1204 }
1205 bo->destroy = destroy;
1206
1207 spin_lock_init(&bo->lock);
1208 kref_init(&bo->kref);
1209 kref_init(&bo->list_kref);
1210 atomic_set(&bo->cpu_writers, 0);
1211 atomic_set(&bo->reserved, 1);
1212 init_waitqueue_head(&bo->event_queue);
1213 INIT_LIST_HEAD(&bo->lru);
1214 INIT_LIST_HEAD(&bo->ddestroy);
1215 INIT_LIST_HEAD(&bo->swap);
1216 bo->bdev = bdev;
1217 bo->glob = bdev->glob;
1218 bo->type = type;
1219 bo->num_pages = num_pages;
1220 bo->mem.size = num_pages << PAGE_SHIFT;
1221 bo->mem.mem_type = TTM_PL_SYSTEM;
1222 bo->mem.num_pages = bo->num_pages;
1223 bo->mem.mm_node = NULL;
1224 bo->mem.page_alignment = page_alignment;
1225 bo->mem.bus.io_reserved = false;
1226 bo->buffer_start = buffer_start & PAGE_MASK;
1227 bo->priv_flags = 0;
1228 bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1229 bo->seq_valid = false;
1230 bo->persistant_swap_storage = persistant_swap_storage;
1231 bo->acc_size = acc_size;
1232 atomic_inc(&bo->glob->bo_count);
1233
1234 ret = ttm_bo_check_placement(bo, placement);
1235 if (unlikely(ret != 0))
1236 goto out_err;
1237
1238 /*
1239 * For ttm_bo_type_device buffers, allocate
1240 * address space from the device.
1241 */
1242 if (bo->type == ttm_bo_type_device) {
1243 ret = ttm_bo_setup_vm(bo);
1244 if (ret)
1245 goto out_err;
1246 }
1247
1248 ret = ttm_bo_validate(bo, placement, interruptible, false, false);
1249 if (ret)
1250 goto out_err;
1251
1252 ttm_bo_unreserve(bo);
1253 return 0;
1254
1255 out_err:
1256 ttm_bo_unreserve(bo);
1257 ttm_bo_unref(&bo);
1258
1259 return ret;
1260 }
1261 EXPORT_SYMBOL(ttm_bo_init);
1262
1263 static inline size_t ttm_bo_size(struct ttm_bo_global *glob,
1264 unsigned long num_pages)
1265 {
1266 size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) &
1267 PAGE_MASK;
1268
1269 return glob->ttm_bo_size + 2 * page_array_size;
1270 }
1271
1272 int ttm_bo_create(struct ttm_bo_device *bdev,
1273 unsigned long size,
1274 enum ttm_bo_type type,
1275 struct ttm_placement *placement,
1276 uint32_t page_alignment,
1277 unsigned long buffer_start,
1278 bool interruptible,
1279 struct file *persistant_swap_storage,
1280 struct ttm_buffer_object **p_bo)
1281 {
1282 struct ttm_buffer_object *bo;
1283 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1284 int ret;
1285
1286 size_t acc_size =
1287 ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
1288 ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
1289 if (unlikely(ret != 0))
1290 return ret;
1291
1292 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
1293
1294 if (unlikely(bo == NULL)) {
1295 ttm_mem_global_free(mem_glob, acc_size);
1296 return -ENOMEM;
1297 }
1298
1299 ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1300 buffer_start, interruptible,
1301 persistant_swap_storage, acc_size, NULL);
1302 if (likely(ret == 0))
1303 *p_bo = bo;
1304
1305 return ret;
1306 }
1307
1308 static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1309 unsigned mem_type, bool allow_errors)
1310 {
1311 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1312 struct ttm_bo_global *glob = bdev->glob;
1313 int ret;
1314
1315 /*
1316 * Can't use standard list traversal since we're unlocking.
1317 */
1318
1319 spin_lock(&glob->lru_lock);
1320 while (!list_empty(&man->lru)) {
1321 spin_unlock(&glob->lru_lock);
1322 ret = ttm_mem_evict_first(bdev, mem_type, false, false, false);
1323 if (ret) {
1324 if (allow_errors) {
1325 return ret;
1326 } else {
1327 printk(KERN_ERR TTM_PFX
1328 "Cleanup eviction failed\n");
1329 }
1330 }
1331 spin_lock(&glob->lru_lock);
1332 }
1333 spin_unlock(&glob->lru_lock);
1334 return 0;
1335 }
1336
1337 int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1338 {
1339 struct ttm_bo_global *glob = bdev->glob;
1340 struct ttm_mem_type_manager *man;
1341 int ret = -EINVAL;
1342
1343 if (mem_type >= TTM_NUM_MEM_TYPES) {
1344 printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type);
1345 return ret;
1346 }
1347 man = &bdev->man[mem_type];
1348
1349 if (!man->has_type) {
1350 printk(KERN_ERR TTM_PFX "Trying to take down uninitialized "
1351 "memory manager type %u\n", mem_type);
1352 return ret;
1353 }
1354
1355 man->use_type = false;
1356 man->has_type = false;
1357
1358 ret = 0;
1359 if (mem_type > 0) {
1360 ttm_bo_force_list_clean(bdev, mem_type, false);
1361
1362 spin_lock(&glob->lru_lock);
1363 if (drm_mm_clean(&man->manager))
1364 drm_mm_takedown(&man->manager);
1365 else
1366 ret = -EBUSY;
1367
1368 spin_unlock(&glob->lru_lock);
1369 }
1370
1371 return ret;
1372 }
1373 EXPORT_SYMBOL(ttm_bo_clean_mm);
1374
1375 int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1376 {
1377 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1378
1379 if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1380 printk(KERN_ERR TTM_PFX
1381 "Illegal memory manager memory type %u.\n",
1382 mem_type);
1383 return -EINVAL;
1384 }
1385
1386 if (!man->has_type) {
1387 printk(KERN_ERR TTM_PFX
1388 "Memory type %u has not been initialized.\n",
1389 mem_type);
1390 return 0;
1391 }
1392
1393 return ttm_bo_force_list_clean(bdev, mem_type, true);
1394 }
1395 EXPORT_SYMBOL(ttm_bo_evict_mm);
1396
1397 int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1398 unsigned long p_size)
1399 {
1400 int ret = -EINVAL;
1401 struct ttm_mem_type_manager *man;
1402
1403 if (type >= TTM_NUM_MEM_TYPES) {
1404 printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type);
1405 return ret;
1406 }
1407
1408 man = &bdev->man[type];
1409 if (man->has_type) {
1410 printk(KERN_ERR TTM_PFX
1411 "Memory manager already initialized for type %d\n",
1412 type);
1413 return ret;
1414 }
1415
1416 ret = bdev->driver->init_mem_type(bdev, type, man);
1417 if (ret)
1418 return ret;
1419
1420 ret = 0;
1421 if (type != TTM_PL_SYSTEM) {
1422 if (!p_size) {
1423 printk(KERN_ERR TTM_PFX
1424 "Zero size memory manager type %d\n",
1425 type);
1426 return ret;
1427 }
1428 ret = drm_mm_init(&man->manager, 0, p_size);
1429 if (ret)
1430 return ret;
1431 }
1432 man->has_type = true;
1433 man->use_type = true;
1434 man->size = p_size;
1435
1436 INIT_LIST_HEAD(&man->lru);
1437
1438 return 0;
1439 }
1440 EXPORT_SYMBOL(ttm_bo_init_mm);
1441
1442 static void ttm_bo_global_kobj_release(struct kobject *kobj)
1443 {
1444 struct ttm_bo_global *glob =
1445 container_of(kobj, struct ttm_bo_global, kobj);
1446
1447 ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
1448 __free_page(glob->dummy_read_page);
1449 kfree(glob);
1450 }
1451
1452 void ttm_bo_global_release(struct drm_global_reference *ref)
1453 {
1454 struct ttm_bo_global *glob = ref->object;
1455
1456 kobject_del(&glob->kobj);
1457 kobject_put(&glob->kobj);
1458 }
1459 EXPORT_SYMBOL(ttm_bo_global_release);
1460
1461 int ttm_bo_global_init(struct drm_global_reference *ref)
1462 {
1463 struct ttm_bo_global_ref *bo_ref =
1464 container_of(ref, struct ttm_bo_global_ref, ref);
1465 struct ttm_bo_global *glob = ref->object;
1466 int ret;
1467
1468 mutex_init(&glob->device_list_mutex);
1469 spin_lock_init(&glob->lru_lock);
1470 glob->mem_glob = bo_ref->mem_glob;
1471 glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
1472
1473 if (unlikely(glob->dummy_read_page == NULL)) {
1474 ret = -ENOMEM;
1475 goto out_no_drp;
1476 }
1477
1478 INIT_LIST_HEAD(&glob->swap_lru);
1479 INIT_LIST_HEAD(&glob->device_list);
1480
1481 ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
1482 ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
1483 if (unlikely(ret != 0)) {
1484 printk(KERN_ERR TTM_PFX
1485 "Could not register buffer object swapout.\n");
1486 goto out_no_shrink;
1487 }
1488
1489 glob->ttm_bo_extra_size =
1490 ttm_round_pot(sizeof(struct ttm_tt)) +
1491 ttm_round_pot(sizeof(struct ttm_backend));
1492
1493 glob->ttm_bo_size = glob->ttm_bo_extra_size +
1494 ttm_round_pot(sizeof(struct ttm_buffer_object));
1495
1496 atomic_set(&glob->bo_count, 0);
1497
1498 ret = kobject_init_and_add(
1499 &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
1500 if (unlikely(ret != 0))
1501 kobject_put(&glob->kobj);
1502 return ret;
1503 out_no_shrink:
1504 __free_page(glob->dummy_read_page);
1505 out_no_drp:
1506 kfree(glob);
1507 return ret;
1508 }
1509 EXPORT_SYMBOL(ttm_bo_global_init);
1510
1511
1512 int ttm_bo_device_release(struct ttm_bo_device *bdev)
1513 {
1514 int ret = 0;
1515 unsigned i = TTM_NUM_MEM_TYPES;
1516 struct ttm_mem_type_manager *man;
1517 struct ttm_bo_global *glob = bdev->glob;
1518
1519 while (i--) {
1520 man = &bdev->man[i];
1521 if (man->has_type) {
1522 man->use_type = false;
1523 if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1524 ret = -EBUSY;
1525 printk(KERN_ERR TTM_PFX
1526 "DRM memory manager type %d "
1527 "is not clean.\n", i);
1528 }
1529 man->has_type = false;
1530 }
1531 }
1532
1533 mutex_lock(&glob->device_list_mutex);
1534 list_del(&bdev->device_list);
1535 mutex_unlock(&glob->device_list_mutex);
1536
1537 if (!cancel_delayed_work(&bdev->wq))
1538 flush_scheduled_work();
1539
1540 while (ttm_bo_delayed_delete(bdev, true))
1541 ;
1542
1543 spin_lock(&glob->lru_lock);
1544 if (list_empty(&bdev->ddestroy))
1545 TTM_DEBUG("Delayed destroy list was clean\n");
1546
1547 if (list_empty(&bdev->man[0].lru))
1548 TTM_DEBUG("Swap list was clean\n");
1549 spin_unlock(&glob->lru_lock);
1550
1551 BUG_ON(!drm_mm_clean(&bdev->addr_space_mm));
1552 write_lock(&bdev->vm_lock);
1553 drm_mm_takedown(&bdev->addr_space_mm);
1554 write_unlock(&bdev->vm_lock);
1555
1556 return ret;
1557 }
1558 EXPORT_SYMBOL(ttm_bo_device_release);
1559
1560 int ttm_bo_device_init(struct ttm_bo_device *bdev,
1561 struct ttm_bo_global *glob,
1562 struct ttm_bo_driver *driver,
1563 uint64_t file_page_offset,
1564 bool need_dma32)
1565 {
1566 int ret = -EINVAL;
1567
1568 rwlock_init(&bdev->vm_lock);
1569 bdev->driver = driver;
1570
1571 memset(bdev->man, 0, sizeof(bdev->man));
1572
1573 /*
1574 * Initialize the system memory buffer type.
1575 * Other types need to be driver / IOCTL initialized.
1576 */
1577 ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1578 if (unlikely(ret != 0))
1579 goto out_no_sys;
1580
1581 bdev->addr_space_rb = RB_ROOT;
1582 ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
1583 if (unlikely(ret != 0))
1584 goto out_no_addr_mm;
1585
1586 INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
1587 bdev->nice_mode = true;
1588 INIT_LIST_HEAD(&bdev->ddestroy);
1589 bdev->dev_mapping = NULL;
1590 bdev->glob = glob;
1591 bdev->need_dma32 = need_dma32;
1592
1593 mutex_lock(&glob->device_list_mutex);
1594 list_add_tail(&bdev->device_list, &glob->device_list);
1595 mutex_unlock(&glob->device_list_mutex);
1596
1597 return 0;
1598 out_no_addr_mm:
1599 ttm_bo_clean_mm(bdev, 0);
1600 out_no_sys:
1601 return ret;
1602 }
1603 EXPORT_SYMBOL(ttm_bo_device_init);
1604
1605 /*
1606 * buffer object vm functions.
1607 */
1608
1609 bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1610 {
1611 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1612
1613 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1614 if (mem->mem_type == TTM_PL_SYSTEM)
1615 return false;
1616
1617 if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1618 return false;
1619
1620 if (mem->placement & TTM_PL_FLAG_CACHED)
1621 return false;
1622 }
1623 return true;
1624 }
1625
1626 void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1627 {
1628 struct ttm_bo_device *bdev = bo->bdev;
1629 loff_t offset = (loff_t) bo->addr_space_offset;
1630 loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT;
1631
1632 if (!bdev->dev_mapping)
1633 return;
1634 unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
1635 ttm_mem_io_free(bdev, &bo->mem);
1636 }
1637 EXPORT_SYMBOL(ttm_bo_unmap_virtual);
1638
1639 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
1640 {
1641 struct ttm_bo_device *bdev = bo->bdev;
1642 struct rb_node **cur = &bdev->addr_space_rb.rb_node;
1643 struct rb_node *parent = NULL;
1644 struct ttm_buffer_object *cur_bo;
1645 unsigned long offset = bo->vm_node->start;
1646 unsigned long cur_offset;
1647
1648 while (*cur) {
1649 parent = *cur;
1650 cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb);
1651 cur_offset = cur_bo->vm_node->start;
1652 if (offset < cur_offset)
1653 cur = &parent->rb_left;
1654 else if (offset > cur_offset)
1655 cur = &parent->rb_right;
1656 else
1657 BUG();
1658 }
1659
1660 rb_link_node(&bo->vm_rb, parent, cur);
1661 rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb);
1662 }
1663
1664 /**
1665 * ttm_bo_setup_vm:
1666 *
1667 * @bo: the buffer to allocate address space for
1668 *
1669 * Allocate address space in the drm device so that applications
1670 * can mmap the buffer and access the contents. This only
1671 * applies to ttm_bo_type_device objects as others are not
1672 * placed in the drm device address space.
1673 */
1674
1675 static int ttm_bo_setup_vm(struct ttm_buffer_object *bo)
1676 {
1677 struct ttm_bo_device *bdev = bo->bdev;
1678 int ret;
1679
1680 retry_pre_get:
1681 ret = drm_mm_pre_get(&bdev->addr_space_mm);
1682 if (unlikely(ret != 0))
1683 return ret;
1684
1685 write_lock(&bdev->vm_lock);
1686 bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm,
1687 bo->mem.num_pages, 0, 0);
1688
1689 if (unlikely(bo->vm_node == NULL)) {
1690 ret = -ENOMEM;
1691 goto out_unlock;
1692 }
1693
1694 bo->vm_node = drm_mm_get_block_atomic(bo->vm_node,
1695 bo->mem.num_pages, 0);
1696
1697 if (unlikely(bo->vm_node == NULL)) {
1698 write_unlock(&bdev->vm_lock);
1699 goto retry_pre_get;
1700 }
1701
1702 ttm_bo_vm_insert_rb(bo);
1703 write_unlock(&bdev->vm_lock);
1704 bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT;
1705
1706 return 0;
1707 out_unlock:
1708 write_unlock(&bdev->vm_lock);
1709 return ret;
1710 }
1711
1712 int ttm_bo_wait(struct ttm_buffer_object *bo,
1713 bool lazy, bool interruptible, bool no_wait)
1714 {
1715 struct ttm_bo_driver *driver = bo->bdev->driver;
1716 void *sync_obj;
1717 void *sync_obj_arg;
1718 int ret = 0;
1719
1720 if (likely(bo->sync_obj == NULL))
1721 return 0;
1722
1723 while (bo->sync_obj) {
1724
1725 if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) {
1726 void *tmp_obj = bo->sync_obj;
1727 bo->sync_obj = NULL;
1728 clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
1729 spin_unlock(&bo->lock);
1730 driver->sync_obj_unref(&tmp_obj);
1731 spin_lock(&bo->lock);
1732 continue;
1733 }
1734
1735 if (no_wait)
1736 return -EBUSY;
1737
1738 sync_obj = driver->sync_obj_ref(bo->sync_obj);
1739 sync_obj_arg = bo->sync_obj_arg;
1740 spin_unlock(&bo->lock);
1741 ret = driver->sync_obj_wait(sync_obj, sync_obj_arg,
1742 lazy, interruptible);
1743 if (unlikely(ret != 0)) {
1744 driver->sync_obj_unref(&sync_obj);
1745 spin_lock(&bo->lock);
1746 return ret;
1747 }
1748 spin_lock(&bo->lock);
1749 if (likely(bo->sync_obj == sync_obj &&
1750 bo->sync_obj_arg == sync_obj_arg)) {
1751 void *tmp_obj = bo->sync_obj;
1752 bo->sync_obj = NULL;
1753 clear_bit(TTM_BO_PRIV_FLAG_MOVING,
1754 &bo->priv_flags);
1755 spin_unlock(&bo->lock);
1756 driver->sync_obj_unref(&sync_obj);
1757 driver->sync_obj_unref(&tmp_obj);
1758 spin_lock(&bo->lock);
1759 } else {
1760 spin_unlock(&bo->lock);
1761 driver->sync_obj_unref(&sync_obj);
1762 spin_lock(&bo->lock);
1763 }
1764 }
1765 return 0;
1766 }
1767 EXPORT_SYMBOL(ttm_bo_wait);
1768
1769 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1770 {
1771 int ret = 0;
1772
1773 /*
1774 * Using ttm_bo_reserve makes sure the lru lists are updated.
1775 */
1776
1777 ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
1778 if (unlikely(ret != 0))
1779 return ret;
1780 spin_lock(&bo->lock);
1781 ret = ttm_bo_wait(bo, false, true, no_wait);
1782 spin_unlock(&bo->lock);
1783 if (likely(ret == 0))
1784 atomic_inc(&bo->cpu_writers);
1785 ttm_bo_unreserve(bo);
1786 return ret;
1787 }
1788 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
1789
1790 void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1791 {
1792 if (atomic_dec_and_test(&bo->cpu_writers))
1793 wake_up_all(&bo->event_queue);
1794 }
1795 EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
1796
1797 /**
1798 * A buffer object shrink method that tries to swap out the first
1799 * buffer object on the bo_global::swap_lru list.
1800 */
1801
1802 static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
1803 {
1804 struct ttm_bo_global *glob =
1805 container_of(shrink, struct ttm_bo_global, shrink);
1806 struct ttm_buffer_object *bo;
1807 int ret = -EBUSY;
1808 int put_count;
1809 uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
1810
1811 spin_lock(&glob->lru_lock);
1812 while (ret == -EBUSY) {
1813 if (unlikely(list_empty(&glob->swap_lru))) {
1814 spin_unlock(&glob->lru_lock);
1815 return -EBUSY;
1816 }
1817
1818 bo = list_first_entry(&glob->swap_lru,
1819 struct ttm_buffer_object, swap);
1820 kref_get(&bo->list_kref);
1821
1822 /**
1823 * Reserve buffer. Since we unlock while sleeping, we need
1824 * to re-check that nobody removed us from the swap-list while
1825 * we slept.
1826 */
1827
1828 ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
1829 if (unlikely(ret == -EBUSY)) {
1830 spin_unlock(&glob->lru_lock);
1831 ttm_bo_wait_unreserved(bo, false);
1832 kref_put(&bo->list_kref, ttm_bo_release_list);
1833 spin_lock(&glob->lru_lock);
1834 }
1835 }
1836
1837 BUG_ON(ret != 0);
1838 put_count = ttm_bo_del_from_lru(bo);
1839 spin_unlock(&glob->lru_lock);
1840
1841 while (put_count--)
1842 kref_put(&bo->list_kref, ttm_bo_ref_bug);
1843
1844 /**
1845 * Wait for GPU, then move to system cached.
1846 */
1847
1848 spin_lock(&bo->lock);
1849 ret = ttm_bo_wait(bo, false, false, false);
1850 spin_unlock(&bo->lock);
1851
1852 if (unlikely(ret != 0))
1853 goto out;
1854
1855 if ((bo->mem.placement & swap_placement) != swap_placement) {
1856 struct ttm_mem_reg evict_mem;
1857
1858 evict_mem = bo->mem;
1859 evict_mem.mm_node = NULL;
1860 evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1861 evict_mem.mem_type = TTM_PL_SYSTEM;
1862
1863 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
1864 false, false, false);
1865 if (unlikely(ret != 0))
1866 goto out;
1867 }
1868
1869 ttm_bo_unmap_virtual(bo);
1870
1871 /**
1872 * Swap out. Buffer will be swapped in again as soon as
1873 * anyone tries to access a ttm page.
1874 */
1875
1876 if (bo->bdev->driver->swap_notify)
1877 bo->bdev->driver->swap_notify(bo);
1878
1879 ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage);
1880 out:
1881
1882 /**
1883 *
1884 * Unreserve without putting on LRU to avoid swapping out an
1885 * already swapped buffer.
1886 */
1887
1888 atomic_set(&bo->reserved, 0);
1889 wake_up_all(&bo->event_queue);
1890 kref_put(&bo->list_kref, ttm_bo_release_list);
1891 return ret;
1892 }
1893
1894 void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1895 {
1896 while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
1897 ;
1898 }
1899 EXPORT_SYMBOL(ttm_bo_swapout_all);
Tomato firmware and modifications.