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30
31#define pr_fmt(fmt) "[TTM] " fmt
32
33#include <drm/ttm/ttm_module.h>
34#include <drm/ttm/ttm_bo_driver.h>
35#include <drm/ttm/ttm_placement.h>
36#include <linux/jiffies.h>
37#include <linux/slab.h>
38#include <linux/sched.h>
39#include <linux/mm.h>
40#include <linux/file.h>
41#include <linux/module.h>
42#include <linux/atomic.h>
43#include <linux/reservation.h>
44
45#define TTM_ASSERT_LOCKED(param)
46#define TTM_DEBUG(fmt, arg...)
47#define TTM_BO_HASH_ORDER 13
48
49static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
50static void ttm_bo_global_kobj_release(struct kobject *kobj);
51
52static struct attribute ttm_bo_count = {
53 .name = "bo_count",
54 .mode = S_IRUGO
55};
56
57static inline int ttm_mem_type_from_place(const struct ttm_place *place,
58 uint32_t *mem_type)
59{
60 int pos;
61
62 pos = ffs(place->flags & TTM_PL_MASK_MEM);
63 if (unlikely(!pos))
64 return -EINVAL;
65
66 *mem_type = pos - 1;
67 return 0;
68}
69
70static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
71{
72 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
73 struct drm_printer p = drm_debug_printer(TTM_PFX);
74
75 pr_err(" has_type: %d\n", man->has_type);
76 pr_err(" use_type: %d\n", man->use_type);
77 pr_err(" flags: 0x%08X\n", man->flags);
78 pr_err(" gpu_offset: 0x%08llX\n", man->gpu_offset);
79 pr_err(" size: %llu\n", man->size);
80 pr_err(" available_caching: 0x%08X\n", man->available_caching);
81 pr_err(" default_caching: 0x%08X\n", man->default_caching);
82 if (mem_type != TTM_PL_SYSTEM)
83 (*man->func->debug)(man, &p);
84}
85
86static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
87 struct ttm_placement *placement)
88{
89 int i, ret, mem_type;
90
91 pr_err("No space for %p (%lu pages, %luK, %luM)\n",
92 bo, bo->mem.num_pages, bo->mem.size >> 10,
93 bo->mem.size >> 20);
94 for (i = 0; i < placement->num_placement; i++) {
95 ret = ttm_mem_type_from_place(&placement->placement[i],
96 &mem_type);
97 if (ret)
98 return;
99 pr_err(" placement[%d]=0x%08X (%d)\n",
100 i, placement->placement[i].flags, mem_type);
101 ttm_mem_type_debug(bo->bdev, mem_type);
102 }
103}
104
105static ssize_t ttm_bo_global_show(struct kobject *kobj,
106 struct attribute *attr,
107 char *buffer)
108{
109 struct ttm_bo_global *glob =
110 container_of(kobj, struct ttm_bo_global, kobj);
111
112 return snprintf(buffer, PAGE_SIZE, "%d\n",
113 atomic_read(&glob->bo_count));
114}
115
116static struct attribute *ttm_bo_global_attrs[] = {
117 &ttm_bo_count,
118 NULL
119};
120
121static const struct sysfs_ops ttm_bo_global_ops = {
122 .show = &ttm_bo_global_show
123};
124
125static struct kobj_type ttm_bo_glob_kobj_type = {
126 .release = &ttm_bo_global_kobj_release,
127 .sysfs_ops = &ttm_bo_global_ops,
128 .default_attrs = ttm_bo_global_attrs
129};
130
131
132static inline uint32_t ttm_bo_type_flags(unsigned type)
133{
134 return 1 << (type);
135}
136
137static void ttm_bo_release_list(struct kref *list_kref)
138{
139 struct ttm_buffer_object *bo =
140 container_of(list_kref, struct ttm_buffer_object, list_kref);
141 struct ttm_bo_device *bdev = bo->bdev;
142 size_t acc_size = bo->acc_size;
143
144 BUG_ON(kref_read(&bo->list_kref));
145 BUG_ON(kref_read(&bo->kref));
146 BUG_ON(atomic_read(&bo->cpu_writers));
147 BUG_ON(bo->mem.mm_node != NULL);
148 BUG_ON(!list_empty(&bo->lru));
149 BUG_ON(!list_empty(&bo->ddestroy));
150 ttm_tt_destroy(bo->ttm);
151 atomic_dec(&bo->glob->bo_count);
152 dma_fence_put(bo->moving);
153 if (bo->resv == &bo->ttm_resv)
154 reservation_object_fini(&bo->ttm_resv);
155 mutex_destroy(&bo->wu_mutex);
156 if (bo->destroy)
157 bo->destroy(bo);
158 else {
159 kfree(bo);
160 }
161 ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
162}
163
164void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
165{
166 struct ttm_bo_device *bdev = bo->bdev;
167 struct ttm_mem_type_manager *man;
168
169 lockdep_assert_held(&bo->resv->lock.base);
170
171 if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
172
173 BUG_ON(!list_empty(&bo->lru));
174
175 man = &bdev->man[bo->mem.mem_type];
176 list_add_tail(&bo->lru, &man->lru[bo->priority]);
177 kref_get(&bo->list_kref);
178
179 if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
180 list_add_tail(&bo->swap,
181 &bo->glob->swap_lru[bo->priority]);
182 kref_get(&bo->list_kref);
183 }
184 }
185}
186EXPORT_SYMBOL(ttm_bo_add_to_lru);
187
188static void ttm_bo_ref_bug(struct kref *list_kref)
189{
190 BUG();
191}
192
193void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
194{
195 if (!list_empty(&bo->swap)) {
196 list_del_init(&bo->swap);
197 kref_put(&bo->list_kref, ttm_bo_ref_bug);
198 }
199 if (!list_empty(&bo->lru)) {
200 list_del_init(&bo->lru);
201 kref_put(&bo->list_kref, ttm_bo_ref_bug);
202 }
203
204
205
206
207
208}
209
210void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
211{
212 spin_lock(&bo->glob->lru_lock);
213 ttm_bo_del_from_lru(bo);
214 spin_unlock(&bo->glob->lru_lock);
215}
216EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
217
218void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
219{
220 lockdep_assert_held(&bo->resv->lock.base);
221
222 ttm_bo_del_from_lru(bo);
223 ttm_bo_add_to_lru(bo);
224}
225EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
226
227
228
229
230static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
231{
232 struct ttm_bo_device *bdev = bo->bdev;
233 struct ttm_bo_global *glob = bo->glob;
234 int ret = 0;
235 uint32_t page_flags = 0;
236
237 TTM_ASSERT_LOCKED(&bo->mutex);
238 bo->ttm = NULL;
239
240 if (bdev->need_dma32)
241 page_flags |= TTM_PAGE_FLAG_DMA32;
242
243 switch (bo->type) {
244 case ttm_bo_type_device:
245 if (zero_alloc)
246 page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
247 case ttm_bo_type_kernel:
248 bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
249 page_flags, glob->dummy_read_page);
250 if (unlikely(bo->ttm == NULL))
251 ret = -ENOMEM;
252 break;
253 case ttm_bo_type_sg:
254 bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
255 page_flags | TTM_PAGE_FLAG_SG,
256 glob->dummy_read_page);
257 if (unlikely(bo->ttm == NULL)) {
258 ret = -ENOMEM;
259 break;
260 }
261 bo->ttm->sg = bo->sg;
262 break;
263 default:
264 pr_err("Illegal buffer object type\n");
265 ret = -EINVAL;
266 break;
267 }
268
269 return ret;
270}
271
272static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
273 struct ttm_mem_reg *mem,
274 bool evict, bool interruptible,
275 bool no_wait_gpu)
276{
277 struct ttm_bo_device *bdev = bo->bdev;
278 bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
279 bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
280 struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
281 struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
282 int ret = 0;
283
284 if (old_is_pci || new_is_pci ||
285 ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
286 ret = ttm_mem_io_lock(old_man, true);
287 if (unlikely(ret != 0))
288 goto out_err;
289 ttm_bo_unmap_virtual_locked(bo);
290 ttm_mem_io_unlock(old_man);
291 }
292
293
294
295
296
297 if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
298 if (bo->ttm == NULL) {
299 bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
300 ret = ttm_bo_add_ttm(bo, zero);
301 if (ret)
302 goto out_err;
303 }
304
305 ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
306 if (ret)
307 goto out_err;
308
309 if (mem->mem_type != TTM_PL_SYSTEM) {
310 ret = ttm_tt_bind(bo->ttm, mem);
311 if (ret)
312 goto out_err;
313 }
314
315 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
316 if (bdev->driver->move_notify)
317 bdev->driver->move_notify(bo, evict, mem);
318 bo->mem = *mem;
319 mem->mm_node = NULL;
320 goto moved;
321 }
322 }
323
324 if (bdev->driver->move_notify)
325 bdev->driver->move_notify(bo, evict, mem);
326
327 if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
328 !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
329 ret = ttm_bo_move_ttm(bo, interruptible, no_wait_gpu, mem);
330 else if (bdev->driver->move)
331 ret = bdev->driver->move(bo, evict, interruptible,
332 no_wait_gpu, mem);
333 else
334 ret = ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu, mem);
335
336 if (ret) {
337 if (bdev->driver->move_notify) {
338 struct ttm_mem_reg tmp_mem = *mem;
339 *mem = bo->mem;
340 bo->mem = tmp_mem;
341 bdev->driver->move_notify(bo, false, mem);
342 bo->mem = *mem;
343 *mem = tmp_mem;
344 }
345
346 goto out_err;
347 }
348
349moved:
350 if (bo->evicted) {
351 if (bdev->driver->invalidate_caches) {
352 ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
353 if (ret)
354 pr_err("Can not flush read caches\n");
355 }
356 bo->evicted = false;
357 }
358
359 if (bo->mem.mm_node) {
360 bo->offset = (bo->mem.start << PAGE_SHIFT) +
361 bdev->man[bo->mem.mem_type].gpu_offset;
362 bo->cur_placement = bo->mem.placement;
363 } else
364 bo->offset = 0;
365
366 return 0;
367
368out_err:
369 new_man = &bdev->man[bo->mem.mem_type];
370 if (new_man->flags & TTM_MEMTYPE_FLAG_FIXED) {
371 ttm_tt_destroy(bo->ttm);
372 bo->ttm = NULL;
373 }
374
375 return ret;
376}
377
378
379
380
381
382
383
384
385
386static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
387{
388 if (bo->bdev->driver->move_notify)
389 bo->bdev->driver->move_notify(bo, false, NULL);
390
391 ttm_tt_destroy(bo->ttm);
392 bo->ttm = NULL;
393 ttm_bo_mem_put(bo, &bo->mem);
394
395 ww_mutex_unlock (&bo->resv->lock);
396}
397
398static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo)
399{
400 int r;
401
402 if (bo->resv == &bo->ttm_resv)
403 return 0;
404
405 reservation_object_init(&bo->ttm_resv);
406 BUG_ON(!reservation_object_trylock(&bo->ttm_resv));
407
408 r = reservation_object_copy_fences(&bo->ttm_resv, bo->resv);
409 if (r) {
410 reservation_object_unlock(&bo->ttm_resv);
411 reservation_object_fini(&bo->ttm_resv);
412 }
413
414 return r;
415}
416
417static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
418{
419 struct reservation_object_list *fobj;
420 struct dma_fence *fence;
421 int i;
422
423 fobj = reservation_object_get_list(&bo->ttm_resv);
424 fence = reservation_object_get_excl(&bo->ttm_resv);
425 if (fence && !fence->ops->signaled)
426 dma_fence_enable_sw_signaling(fence);
427
428 for (i = 0; fobj && i < fobj->shared_count; ++i) {
429 fence = rcu_dereference_protected(fobj->shared[i],
430 reservation_object_held(bo->resv));
431
432 if (!fence->ops->signaled)
433 dma_fence_enable_sw_signaling(fence);
434 }
435}
436
437static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
438{
439 struct ttm_bo_device *bdev = bo->bdev;
440 struct ttm_bo_global *glob = bo->glob;
441 int ret;
442
443 spin_lock(&glob->lru_lock);
444 ret = __ttm_bo_reserve(bo, false, true, NULL);
445
446 if (!ret) {
447 if (!ttm_bo_wait(bo, false, true)) {
448 ttm_bo_del_from_lru(bo);
449 spin_unlock(&glob->lru_lock);
450 ttm_bo_cleanup_memtype_use(bo);
451
452 return;
453 }
454
455 ret = ttm_bo_individualize_resv(bo);
456 if (ret) {
457
458
459
460 spin_unlock(&glob->lru_lock);
461 ttm_bo_wait(bo, true, true);
462 ttm_bo_cleanup_memtype_use(bo);
463 return;
464 }
465 ttm_bo_flush_all_fences(bo);
466
467
468
469
470
471
472 if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
473 bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT;
474 ttm_bo_add_to_lru(bo);
475 }
476
477 if (bo->resv != &bo->ttm_resv)
478 reservation_object_unlock(&bo->ttm_resv);
479 __ttm_bo_unreserve(bo);
480 }
481
482 kref_get(&bo->list_kref);
483 list_add_tail(&bo->ddestroy, &bdev->ddestroy);
484 spin_unlock(&glob->lru_lock);
485
486 schedule_delayed_work(&bdev->wq,
487 ((HZ / 100) < 1) ? 1 : HZ / 100);
488}
489
490
491
492
493
494
495
496
497
498
499
500
501
502static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
503 bool interruptible,
504 bool no_wait_gpu)
505{
506 struct ttm_bo_global *glob = bo->glob;
507 struct reservation_object *resv;
508 int ret;
509
510 if (unlikely(list_empty(&bo->ddestroy)))
511 resv = bo->resv;
512 else
513 resv = &bo->ttm_resv;
514
515 if (reservation_object_test_signaled_rcu(resv, true))
516 ret = 0;
517 else
518 ret = -EBUSY;
519
520 if (ret && !no_wait_gpu) {
521 long lret;
522 ww_mutex_unlock(&bo->resv->lock);
523 spin_unlock(&glob->lru_lock);
524
525 lret = reservation_object_wait_timeout_rcu(resv, true,
526 interruptible,
527 30 * HZ);
528
529 if (lret < 0)
530 return lret;
531 else if (lret == 0)
532 return -EBUSY;
533
534 spin_lock(&glob->lru_lock);
535 ret = __ttm_bo_reserve(bo, false, true, NULL);
536
537
538
539
540
541
542
543
544
545 if (ret) {
546 spin_unlock(&glob->lru_lock);
547 return 0;
548 }
549 }
550
551 if (ret || unlikely(list_empty(&bo->ddestroy))) {
552 __ttm_bo_unreserve(bo);
553 spin_unlock(&glob->lru_lock);
554 return ret;
555 }
556
557 ttm_bo_del_from_lru(bo);
558 list_del_init(&bo->ddestroy);
559 kref_put(&bo->list_kref, ttm_bo_ref_bug);
560
561 spin_unlock(&glob->lru_lock);
562 ttm_bo_cleanup_memtype_use(bo);
563
564 return 0;
565}
566
567
568
569
570
571
572static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
573{
574 struct ttm_bo_global *glob = bdev->glob;
575 struct ttm_buffer_object *entry = NULL;
576 int ret = 0;
577
578 spin_lock(&glob->lru_lock);
579 if (list_empty(&bdev->ddestroy))
580 goto out_unlock;
581
582 entry = list_first_entry(&bdev->ddestroy,
583 struct ttm_buffer_object, ddestroy);
584 kref_get(&entry->list_kref);
585
586 for (;;) {
587 struct ttm_buffer_object *nentry = NULL;
588
589 if (entry->ddestroy.next != &bdev->ddestroy) {
590 nentry = list_first_entry(&entry->ddestroy,
591 struct ttm_buffer_object, ddestroy);
592 kref_get(&nentry->list_kref);
593 }
594
595 ret = __ttm_bo_reserve(entry, false, true, NULL);
596 if (remove_all && ret) {
597 spin_unlock(&glob->lru_lock);
598 ret = __ttm_bo_reserve(entry, false, false, NULL);
599 spin_lock(&glob->lru_lock);
600 }
601
602 if (!ret)
603 ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
604 !remove_all);
605 else
606 spin_unlock(&glob->lru_lock);
607
608 kref_put(&entry->list_kref, ttm_bo_release_list);
609 entry = nentry;
610
611 if (ret || !entry)
612 goto out;
613
614 spin_lock(&glob->lru_lock);
615 if (list_empty(&entry->ddestroy))
616 break;
617 }
618
619out_unlock:
620 spin_unlock(&glob->lru_lock);
621out:
622 if (entry)
623 kref_put(&entry->list_kref, ttm_bo_release_list);
624 return ret;
625}
626
627static void ttm_bo_delayed_workqueue(struct work_struct *work)
628{
629 struct ttm_bo_device *bdev =
630 container_of(work, struct ttm_bo_device, wq.work);
631
632 if (ttm_bo_delayed_delete(bdev, false)) {
633 schedule_delayed_work(&bdev->wq,
634 ((HZ / 100) < 1) ? 1 : HZ / 100);
635 }
636}
637
638static void ttm_bo_release(struct kref *kref)
639{
640 struct ttm_buffer_object *bo =
641 container_of(kref, struct ttm_buffer_object, kref);
642 struct ttm_bo_device *bdev = bo->bdev;
643 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
644
645 drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
646 ttm_mem_io_lock(man, false);
647 ttm_mem_io_free_vm(bo);
648 ttm_mem_io_unlock(man);
649 ttm_bo_cleanup_refs_or_queue(bo);
650 kref_put(&bo->list_kref, ttm_bo_release_list);
651}
652
653void ttm_bo_unref(struct ttm_buffer_object **p_bo)
654{
655 struct ttm_buffer_object *bo = *p_bo;
656
657 *p_bo = NULL;
658 kref_put(&bo->kref, ttm_bo_release);
659}
660EXPORT_SYMBOL(ttm_bo_unref);
661
662int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
663{
664 return cancel_delayed_work_sync(&bdev->wq);
665}
666EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
667
668void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
669{
670 if (resched)
671 schedule_delayed_work(&bdev->wq,
672 ((HZ / 100) < 1) ? 1 : HZ / 100);
673}
674EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
675
676static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
677 bool no_wait_gpu)
678{
679 struct ttm_bo_device *bdev = bo->bdev;
680 struct ttm_mem_reg evict_mem;
681 struct ttm_placement placement;
682 int ret = 0;
683
684 lockdep_assert_held(&bo->resv->lock.base);
685
686 evict_mem = bo->mem;
687 evict_mem.mm_node = NULL;
688 evict_mem.bus.io_reserved_vm = false;
689 evict_mem.bus.io_reserved_count = 0;
690
691 placement.num_placement = 0;
692 placement.num_busy_placement = 0;
693 bdev->driver->evict_flags(bo, &placement);
694 ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
695 no_wait_gpu);
696 if (ret) {
697 if (ret != -ERESTARTSYS) {
698 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
699 bo);
700 ttm_bo_mem_space_debug(bo, &placement);
701 }
702 goto out;
703 }
704
705 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
706 no_wait_gpu);
707 if (unlikely(ret)) {
708 if (ret != -ERESTARTSYS)
709 pr_err("Buffer eviction failed\n");
710 ttm_bo_mem_put(bo, &evict_mem);
711 goto out;
712 }
713 bo->evicted = true;
714out:
715 return ret;
716}
717
718bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
719 const struct ttm_place *place)
720{
721
722
723
724 if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
725 (place->lpfn && place->lpfn <= bo->mem.start))
726 return false;
727
728 return true;
729}
730EXPORT_SYMBOL(ttm_bo_eviction_valuable);
731
732static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
733 uint32_t mem_type,
734 const struct ttm_place *place,
735 bool interruptible,
736 bool no_wait_gpu)
737{
738 struct ttm_bo_global *glob = bdev->glob;
739 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
740 struct ttm_buffer_object *bo;
741 int ret = -EBUSY;
742 unsigned i;
743
744 spin_lock(&glob->lru_lock);
745 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
746 list_for_each_entry(bo, &man->lru[i], lru) {
747 ret = __ttm_bo_reserve(bo, false, true, NULL);
748 if (ret)
749 continue;
750
751 if (place && !bdev->driver->eviction_valuable(bo,
752 place)) {
753 __ttm_bo_unreserve(bo);
754 ret = -EBUSY;
755 continue;
756 }
757
758 break;
759 }
760
761 if (!ret)
762 break;
763 }
764
765 if (ret) {
766 spin_unlock(&glob->lru_lock);
767 return ret;
768 }
769
770 kref_get(&bo->list_kref);
771
772 if (!list_empty(&bo->ddestroy)) {
773 ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible,
774 no_wait_gpu);
775 kref_put(&bo->list_kref, ttm_bo_release_list);
776 return ret;
777 }
778
779 ttm_bo_del_from_lru(bo);
780 spin_unlock(&glob->lru_lock);
781
782 BUG_ON(ret != 0);
783
784 ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
785 ttm_bo_unreserve(bo);
786
787 kref_put(&bo->list_kref, ttm_bo_release_list);
788 return ret;
789}
790
791void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
792{
793 struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
794
795 if (mem->mm_node)
796 (*man->func->put_node)(man, mem);
797}
798EXPORT_SYMBOL(ttm_bo_mem_put);
799
800
801
802
803static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
804 struct ttm_mem_type_manager *man,
805 struct ttm_mem_reg *mem)
806{
807 struct dma_fence *fence;
808 int ret;
809
810 spin_lock(&man->move_lock);
811 fence = dma_fence_get(man->move);
812 spin_unlock(&man->move_lock);
813
814 if (fence) {
815 reservation_object_add_shared_fence(bo->resv, fence);
816
817 ret = reservation_object_reserve_shared(bo->resv);
818 if (unlikely(ret))
819 return ret;
820
821 dma_fence_put(bo->moving);
822 bo->moving = fence;
823 }
824
825 return 0;
826}
827
828
829
830
831
832static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
833 uint32_t mem_type,
834 const struct ttm_place *place,
835 struct ttm_mem_reg *mem,
836 bool interruptible,
837 bool no_wait_gpu)
838{
839 struct ttm_bo_device *bdev = bo->bdev;
840 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
841 int ret;
842
843 do {
844 ret = (*man->func->get_node)(man, bo, place, mem);
845 if (unlikely(ret != 0))
846 return ret;
847 if (mem->mm_node)
848 break;
849 ret = ttm_mem_evict_first(bdev, mem_type, place,
850 interruptible, no_wait_gpu);
851 if (unlikely(ret != 0))
852 return ret;
853 } while (1);
854 mem->mem_type = mem_type;
855 return ttm_bo_add_move_fence(bo, man, mem);
856}
857
858static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
859 uint32_t cur_placement,
860 uint32_t proposed_placement)
861{
862 uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
863 uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
864
865
866
867
868
869 if ((cur_placement & caching) != 0)
870 result |= (cur_placement & caching);
871 else if ((man->default_caching & caching) != 0)
872 result |= man->default_caching;
873 else if ((TTM_PL_FLAG_CACHED & caching) != 0)
874 result |= TTM_PL_FLAG_CACHED;
875 else if ((TTM_PL_FLAG_WC & caching) != 0)
876 result |= TTM_PL_FLAG_WC;
877 else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
878 result |= TTM_PL_FLAG_UNCACHED;
879
880 return result;
881}
882
883static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
884 uint32_t mem_type,
885 const struct ttm_place *place,
886 uint32_t *masked_placement)
887{
888 uint32_t cur_flags = ttm_bo_type_flags(mem_type);
889
890 if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0)
891 return false;
892
893 if ((place->flags & man->available_caching) == 0)
894 return false;
895
896 cur_flags |= (place->flags & man->available_caching);
897
898 *masked_placement = cur_flags;
899 return true;
900}
901
902
903
904
905
906
907
908
909
910int ttm_bo_mem_space(struct ttm_buffer_object *bo,
911 struct ttm_placement *placement,
912 struct ttm_mem_reg *mem,
913 bool interruptible,
914 bool no_wait_gpu)
915{
916 struct ttm_bo_device *bdev = bo->bdev;
917 struct ttm_mem_type_manager *man;
918 uint32_t mem_type = TTM_PL_SYSTEM;
919 uint32_t cur_flags = 0;
920 bool type_found = false;
921 bool type_ok = false;
922 bool has_erestartsys = false;
923 int i, ret;
924
925 ret = reservation_object_reserve_shared(bo->resv);
926 if (unlikely(ret))
927 return ret;
928
929 mem->mm_node = NULL;
930 for (i = 0; i < placement->num_placement; ++i) {
931 const struct ttm_place *place = &placement->placement[i];
932
933 ret = ttm_mem_type_from_place(place, &mem_type);
934 if (ret)
935 return ret;
936 man = &bdev->man[mem_type];
937 if (!man->has_type || !man->use_type)
938 continue;
939
940 type_ok = ttm_bo_mt_compatible(man, mem_type, place,
941 &cur_flags);
942
943 if (!type_ok)
944 continue;
945
946 type_found = true;
947 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
948 cur_flags);
949
950
951
952
953 ttm_flag_masked(&cur_flags, place->flags,
954 ~TTM_PL_MASK_MEMTYPE);
955
956 if (mem_type == TTM_PL_SYSTEM)
957 break;
958
959 ret = (*man->func->get_node)(man, bo, place, mem);
960 if (unlikely(ret))
961 return ret;
962
963 if (mem->mm_node) {
964 ret = ttm_bo_add_move_fence(bo, man, mem);
965 if (unlikely(ret)) {
966 (*man->func->put_node)(man, mem);
967 return ret;
968 }
969 break;
970 }
971 }
972
973 if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
974 mem->mem_type = mem_type;
975 mem->placement = cur_flags;
976 return 0;
977 }
978
979 for (i = 0; i < placement->num_busy_placement; ++i) {
980 const struct ttm_place *place = &placement->busy_placement[i];
981
982 ret = ttm_mem_type_from_place(place, &mem_type);
983 if (ret)
984 return ret;
985 man = &bdev->man[mem_type];
986 if (!man->has_type || !man->use_type)
987 continue;
988 if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
989 continue;
990
991 type_found = true;
992 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
993 cur_flags);
994
995
996
997
998 ttm_flag_masked(&cur_flags, place->flags,
999 ~TTM_PL_MASK_MEMTYPE);
1000
1001 if (mem_type == TTM_PL_SYSTEM) {
1002 mem->mem_type = mem_type;
1003 mem->placement = cur_flags;
1004 mem->mm_node = NULL;
1005 return 0;
1006 }
1007
1008 ret = ttm_bo_mem_force_space(bo, mem_type, place, mem,
1009 interruptible, no_wait_gpu);
1010 if (ret == 0 && mem->mm_node) {
1011 mem->placement = cur_flags;
1012 return 0;
1013 }
1014 if (ret == -ERESTARTSYS)
1015 has_erestartsys = true;
1016 }
1017
1018 if (!type_found) {
1019 pr_err(TTM_PFX "No compatible memory type found\n");
1020 return -EINVAL;
1021 }
1022
1023 return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
1024}
1025EXPORT_SYMBOL(ttm_bo_mem_space);
1026
1027static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
1028 struct ttm_placement *placement,
1029 bool interruptible,
1030 bool no_wait_gpu)
1031{
1032 int ret = 0;
1033 struct ttm_mem_reg mem;
1034
1035 lockdep_assert_held(&bo->resv->lock.base);
1036
1037 mem.num_pages = bo->num_pages;
1038 mem.size = mem.num_pages << PAGE_SHIFT;
1039 mem.page_alignment = bo->mem.page_alignment;
1040 mem.bus.io_reserved_vm = false;
1041 mem.bus.io_reserved_count = 0;
1042
1043
1044
1045 ret = ttm_bo_mem_space(bo, placement, &mem,
1046 interruptible, no_wait_gpu);
1047 if (ret)
1048 goto out_unlock;
1049 ret = ttm_bo_handle_move_mem(bo, &mem, false,
1050 interruptible, no_wait_gpu);
1051out_unlock:
1052 if (ret && mem.mm_node)
1053 ttm_bo_mem_put(bo, &mem);
1054 return ret;
1055}
1056
1057static bool ttm_bo_places_compat(const struct ttm_place *places,
1058 unsigned num_placement,
1059 struct ttm_mem_reg *mem,
1060 uint32_t *new_flags)
1061{
1062 unsigned i;
1063
1064 for (i = 0; i < num_placement; i++) {
1065 const struct ttm_place *heap = &places[i];
1066
1067 if (mem->mm_node && (mem->start < heap->fpfn ||
1068 (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
1069 continue;
1070
1071 *new_flags = heap->flags;
1072 if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
1073 (*new_flags & mem->placement & TTM_PL_MASK_MEM) &&
1074 (!(*new_flags & TTM_PL_FLAG_CONTIGUOUS) ||
1075 (mem->placement & TTM_PL_FLAG_CONTIGUOUS)))
1076 return true;
1077 }
1078 return false;
1079}
1080
1081bool ttm_bo_mem_compat(struct ttm_placement *placement,
1082 struct ttm_mem_reg *mem,
1083 uint32_t *new_flags)
1084{
1085 if (ttm_bo_places_compat(placement->placement, placement->num_placement,
1086 mem, new_flags))
1087 return true;
1088
1089 if ((placement->busy_placement != placement->placement ||
1090 placement->num_busy_placement > placement->num_placement) &&
1091 ttm_bo_places_compat(placement->busy_placement,
1092 placement->num_busy_placement,
1093 mem, new_flags))
1094 return true;
1095
1096 return false;
1097}
1098EXPORT_SYMBOL(ttm_bo_mem_compat);
1099
1100int ttm_bo_validate(struct ttm_buffer_object *bo,
1101 struct ttm_placement *placement,
1102 bool interruptible,
1103 bool no_wait_gpu)
1104{
1105 int ret;
1106 uint32_t new_flags;
1107
1108 lockdep_assert_held(&bo->resv->lock.base);
1109
1110
1111
1112 if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
1113 ret = ttm_bo_move_buffer(bo, placement, interruptible,
1114 no_wait_gpu);
1115 if (ret)
1116 return ret;
1117 } else {
1118
1119
1120
1121
1122 ttm_flag_masked(&bo->mem.placement, new_flags,
1123 ~TTM_PL_MASK_MEMTYPE);
1124 }
1125
1126
1127
1128 if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1129 ret = ttm_bo_add_ttm(bo, true);
1130 if (ret)
1131 return ret;
1132 }
1133 return 0;
1134}
1135EXPORT_SYMBOL(ttm_bo_validate);
1136
1137int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
1138 struct ttm_buffer_object *bo,
1139 unsigned long size,
1140 enum ttm_bo_type type,
1141 struct ttm_placement *placement,
1142 uint32_t page_alignment,
1143 bool interruptible,
1144 struct file *persistent_swap_storage,
1145 size_t acc_size,
1146 struct sg_table *sg,
1147 struct reservation_object *resv,
1148 void (*destroy) (struct ttm_buffer_object *))
1149{
1150 int ret = 0;
1151 unsigned long num_pages;
1152 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1153 bool locked;
1154
1155 ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
1156 if (ret) {
1157 pr_err("Out of kernel memory\n");
1158 if (destroy)
1159 (*destroy)(bo);
1160 else
1161 kfree(bo);
1162 return -ENOMEM;
1163 }
1164
1165 num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1166 if (num_pages == 0) {
1167 pr_err("Illegal buffer object size\n");
1168 if (destroy)
1169 (*destroy)(bo);
1170 else
1171 kfree(bo);
1172 ttm_mem_global_free(mem_glob, acc_size);
1173 return -EINVAL;
1174 }
1175 bo->destroy = destroy;
1176
1177 kref_init(&bo->kref);
1178 kref_init(&bo->list_kref);
1179 atomic_set(&bo->cpu_writers, 0);
1180 INIT_LIST_HEAD(&bo->lru);
1181 INIT_LIST_HEAD(&bo->ddestroy);
1182 INIT_LIST_HEAD(&bo->swap);
1183 INIT_LIST_HEAD(&bo->io_reserve_lru);
1184 mutex_init(&bo->wu_mutex);
1185 bo->bdev = bdev;
1186 bo->glob = bdev->glob;
1187 bo->type = type;
1188 bo->num_pages = num_pages;
1189 bo->mem.size = num_pages << PAGE_SHIFT;
1190 bo->mem.mem_type = TTM_PL_SYSTEM;
1191 bo->mem.num_pages = bo->num_pages;
1192 bo->mem.mm_node = NULL;
1193 bo->mem.page_alignment = page_alignment;
1194 bo->mem.bus.io_reserved_vm = false;
1195 bo->mem.bus.io_reserved_count = 0;
1196 bo->moving = NULL;
1197 bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1198 bo->persistent_swap_storage = persistent_swap_storage;
1199 bo->acc_size = acc_size;
1200 bo->sg = sg;
1201 if (resv) {
1202 bo->resv = resv;
1203 lockdep_assert_held(&bo->resv->lock.base);
1204 } else {
1205 bo->resv = &bo->ttm_resv;
1206 reservation_object_init(&bo->ttm_resv);
1207 }
1208 atomic_inc(&bo->glob->bo_count);
1209 drm_vma_node_reset(&bo->vma_node);
1210 bo->priority = 0;
1211
1212
1213
1214
1215
1216 if (bo->type == ttm_bo_type_device ||
1217 bo->type == ttm_bo_type_sg)
1218 ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
1219 bo->mem.num_pages);
1220
1221
1222
1223
1224 if (!resv) {
1225 locked = ww_mutex_trylock(&bo->resv->lock);
1226 WARN_ON(!locked);
1227 }
1228
1229 if (likely(!ret))
1230 ret = ttm_bo_validate(bo, placement, interruptible, false);
1231
1232 if (unlikely(ret)) {
1233 if (!resv)
1234 ttm_bo_unreserve(bo);
1235
1236 ttm_bo_unref(&bo);
1237 return ret;
1238 }
1239
1240 if (resv && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
1241 spin_lock(&bo->glob->lru_lock);
1242 ttm_bo_add_to_lru(bo);
1243 spin_unlock(&bo->glob->lru_lock);
1244 }
1245
1246 return ret;
1247}
1248EXPORT_SYMBOL(ttm_bo_init_reserved);
1249
1250int ttm_bo_init(struct ttm_bo_device *bdev,
1251 struct ttm_buffer_object *bo,
1252 unsigned long size,
1253 enum ttm_bo_type type,
1254 struct ttm_placement *placement,
1255 uint32_t page_alignment,
1256 bool interruptible,
1257 struct file *persistent_swap_storage,
1258 size_t acc_size,
1259 struct sg_table *sg,
1260 struct reservation_object *resv,
1261 void (*destroy) (struct ttm_buffer_object *))
1262{
1263 int ret;
1264
1265 ret = ttm_bo_init_reserved(bdev, bo, size, type, placement,
1266 page_alignment, interruptible,
1267 persistent_swap_storage, acc_size,
1268 sg, resv, destroy);
1269 if (ret)
1270 return ret;
1271
1272 if (!resv)
1273 ttm_bo_unreserve(bo);
1274
1275 return 0;
1276}
1277EXPORT_SYMBOL(ttm_bo_init);
1278
1279size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
1280 unsigned long bo_size,
1281 unsigned struct_size)
1282{
1283 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1284 size_t size = 0;
1285
1286 size += ttm_round_pot(struct_size);
1287 size += ttm_round_pot(npages * sizeof(void *));
1288 size += ttm_round_pot(sizeof(struct ttm_tt));
1289 return size;
1290}
1291EXPORT_SYMBOL(ttm_bo_acc_size);
1292
1293size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
1294 unsigned long bo_size,
1295 unsigned struct_size)
1296{
1297 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1298 size_t size = 0;
1299
1300 size += ttm_round_pot(struct_size);
1301 size += ttm_round_pot(npages * (2*sizeof(void *) + sizeof(dma_addr_t)));
1302 size += ttm_round_pot(sizeof(struct ttm_dma_tt));
1303 return size;
1304}
1305EXPORT_SYMBOL(ttm_bo_dma_acc_size);
1306
1307int ttm_bo_create(struct ttm_bo_device *bdev,
1308 unsigned long size,
1309 enum ttm_bo_type type,
1310 struct ttm_placement *placement,
1311 uint32_t page_alignment,
1312 bool interruptible,
1313 struct file *persistent_swap_storage,
1314 struct ttm_buffer_object **p_bo)
1315{
1316 struct ttm_buffer_object *bo;
1317 size_t acc_size;
1318 int ret;
1319
1320 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
1321 if (unlikely(bo == NULL))
1322 return -ENOMEM;
1323
1324 acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
1325 ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1326 interruptible, persistent_swap_storage, acc_size,
1327 NULL, NULL, NULL);
1328 if (likely(ret == 0))
1329 *p_bo = bo;
1330
1331 return ret;
1332}
1333EXPORT_SYMBOL(ttm_bo_create);
1334
1335static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1336 unsigned mem_type)
1337{
1338 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1339 struct ttm_bo_global *glob = bdev->glob;
1340 struct dma_fence *fence;
1341 int ret;
1342 unsigned i;
1343
1344
1345
1346
1347
1348 spin_lock(&glob->lru_lock);
1349 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
1350 while (!list_empty(&man->lru[i])) {
1351 spin_unlock(&glob->lru_lock);
1352 ret = ttm_mem_evict_first(bdev, mem_type, NULL, false, false);
1353 if (ret)
1354 return ret;
1355 spin_lock(&glob->lru_lock);
1356 }
1357 }
1358 spin_unlock(&glob->lru_lock);
1359
1360 spin_lock(&man->move_lock);
1361 fence = dma_fence_get(man->move);
1362 spin_unlock(&man->move_lock);
1363
1364 if (fence) {
1365 ret = dma_fence_wait(fence, false);
1366 dma_fence_put(fence);
1367 if (ret)
1368 return ret;
1369 }
1370
1371 return 0;
1372}
1373
1374int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1375{
1376 struct ttm_mem_type_manager *man;
1377 int ret = -EINVAL;
1378
1379 if (mem_type >= TTM_NUM_MEM_TYPES) {
1380 pr_err("Illegal memory type %d\n", mem_type);
1381 return ret;
1382 }
1383 man = &bdev->man[mem_type];
1384
1385 if (!man->has_type) {
1386 pr_err("Trying to take down uninitialized memory manager type %u\n",
1387 mem_type);
1388 return ret;
1389 }
1390
1391 man->use_type = false;
1392 man->has_type = false;
1393
1394 ret = 0;
1395 if (mem_type > 0) {
1396 ret = ttm_bo_force_list_clean(bdev, mem_type);
1397 if (ret) {
1398 pr_err("Cleanup eviction failed\n");
1399 return ret;
1400 }
1401
1402 ret = (*man->func->takedown)(man);
1403 }
1404
1405 dma_fence_put(man->move);
1406 man->move = NULL;
1407
1408 return ret;
1409}
1410EXPORT_SYMBOL(ttm_bo_clean_mm);
1411
1412int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1413{
1414 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1415
1416 if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1417 pr_err("Illegal memory manager memory type %u\n", mem_type);
1418 return -EINVAL;
1419 }
1420
1421 if (!man->has_type) {
1422 pr_err("Memory type %u has not been initialized\n", mem_type);
1423 return 0;
1424 }
1425
1426 return ttm_bo_force_list_clean(bdev, mem_type);
1427}
1428EXPORT_SYMBOL(ttm_bo_evict_mm);
1429
1430int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1431 unsigned long p_size)
1432{
1433 int ret;
1434 struct ttm_mem_type_manager *man;
1435 unsigned i;
1436
1437 BUG_ON(type >= TTM_NUM_MEM_TYPES);
1438 man = &bdev->man[type];
1439 BUG_ON(man->has_type);
1440 man->io_reserve_fastpath = true;
1441 man->use_io_reserve_lru = false;
1442 mutex_init(&man->io_reserve_mutex);
1443 spin_lock_init(&man->move_lock);
1444 INIT_LIST_HEAD(&man->io_reserve_lru);
1445
1446 ret = bdev->driver->init_mem_type(bdev, type, man);
1447 if (ret)
1448 return ret;
1449 man->bdev = bdev;
1450
1451 if (type != TTM_PL_SYSTEM) {
1452 ret = (*man->func->init)(man, p_size);
1453 if (ret)
1454 return ret;
1455 }
1456 man->has_type = true;
1457 man->use_type = true;
1458 man->size = p_size;
1459
1460 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1461 INIT_LIST_HEAD(&man->lru[i]);
1462 man->move = NULL;
1463
1464 return 0;
1465}
1466EXPORT_SYMBOL(ttm_bo_init_mm);
1467
1468static void ttm_bo_global_kobj_release(struct kobject *kobj)
1469{
1470 struct ttm_bo_global *glob =
1471 container_of(kobj, struct ttm_bo_global, kobj);
1472
1473 ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
1474 __free_page(glob->dummy_read_page);
1475 kfree(glob);
1476}
1477
1478void ttm_bo_global_release(struct drm_global_reference *ref)
1479{
1480 struct ttm_bo_global *glob = ref->object;
1481
1482 kobject_del(&glob->kobj);
1483 kobject_put(&glob->kobj);
1484}
1485EXPORT_SYMBOL(ttm_bo_global_release);
1486
1487int ttm_bo_global_init(struct drm_global_reference *ref)
1488{
1489 struct ttm_bo_global_ref *bo_ref =
1490 container_of(ref, struct ttm_bo_global_ref, ref);
1491 struct ttm_bo_global *glob = ref->object;
1492 int ret;
1493 unsigned i;
1494
1495 mutex_init(&glob->device_list_mutex);
1496 spin_lock_init(&glob->lru_lock);
1497 glob->mem_glob = bo_ref->mem_glob;
1498 glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
1499
1500 if (unlikely(glob->dummy_read_page == NULL)) {
1501 ret = -ENOMEM;
1502 goto out_no_drp;
1503 }
1504
1505 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1506 INIT_LIST_HEAD(&glob->swap_lru[i]);
1507 INIT_LIST_HEAD(&glob->device_list);
1508
1509 ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
1510 ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
1511 if (unlikely(ret != 0)) {
1512 pr_err("Could not register buffer object swapout\n");
1513 goto out_no_shrink;
1514 }
1515
1516 atomic_set(&glob->bo_count, 0);
1517
1518 ret = kobject_init_and_add(
1519 &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
1520 if (unlikely(ret != 0))
1521 kobject_put(&glob->kobj);
1522 return ret;
1523out_no_shrink:
1524 __free_page(glob->dummy_read_page);
1525out_no_drp:
1526 kfree(glob);
1527 return ret;
1528}
1529EXPORT_SYMBOL(ttm_bo_global_init);
1530
1531
1532int ttm_bo_device_release(struct ttm_bo_device *bdev)
1533{
1534 int ret = 0;
1535 unsigned i = TTM_NUM_MEM_TYPES;
1536 struct ttm_mem_type_manager *man;
1537 struct ttm_bo_global *glob = bdev->glob;
1538
1539 while (i--) {
1540 man = &bdev->man[i];
1541 if (man->has_type) {
1542 man->use_type = false;
1543 if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1544 ret = -EBUSY;
1545 pr_err("DRM memory manager type %d is not clean\n",
1546 i);
1547 }
1548 man->has_type = false;
1549 }
1550 }
1551
1552 mutex_lock(&glob->device_list_mutex);
1553 list_del(&bdev->device_list);
1554 mutex_unlock(&glob->device_list_mutex);
1555
1556 cancel_delayed_work_sync(&bdev->wq);
1557
1558 while (ttm_bo_delayed_delete(bdev, true))
1559 ;
1560
1561 spin_lock(&glob->lru_lock);
1562 if (list_empty(&bdev->ddestroy))
1563 TTM_DEBUG("Delayed destroy list was clean\n");
1564
1565 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1566 if (list_empty(&bdev->man[0].lru[0]))
1567 TTM_DEBUG("Swap list %d was clean\n", i);
1568 spin_unlock(&glob->lru_lock);
1569
1570 drm_vma_offset_manager_destroy(&bdev->vma_manager);
1571
1572 return ret;
1573}
1574EXPORT_SYMBOL(ttm_bo_device_release);
1575
1576int ttm_bo_device_init(struct ttm_bo_device *bdev,
1577 struct ttm_bo_global *glob,
1578 struct ttm_bo_driver *driver,
1579 struct address_space *mapping,
1580 uint64_t file_page_offset,
1581 bool need_dma32)
1582{
1583 int ret = -EINVAL;
1584
1585 bdev->driver = driver;
1586
1587 memset(bdev->man, 0, sizeof(bdev->man));
1588
1589
1590
1591
1592
1593 ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1594 if (unlikely(ret != 0))
1595 goto out_no_sys;
1596
1597 drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
1598 0x10000000);
1599 INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
1600 INIT_LIST_HEAD(&bdev->ddestroy);
1601 bdev->dev_mapping = mapping;
1602 bdev->glob = glob;
1603 bdev->need_dma32 = need_dma32;
1604 mutex_lock(&glob->device_list_mutex);
1605 list_add_tail(&bdev->device_list, &glob->device_list);
1606 mutex_unlock(&glob->device_list_mutex);
1607
1608 return 0;
1609out_no_sys:
1610 return ret;
1611}
1612EXPORT_SYMBOL(ttm_bo_device_init);
1613
1614
1615
1616
1617
1618bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1619{
1620 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1621
1622 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1623 if (mem->mem_type == TTM_PL_SYSTEM)
1624 return false;
1625
1626 if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1627 return false;
1628
1629 if (mem->placement & TTM_PL_FLAG_CACHED)
1630 return false;
1631 }
1632 return true;
1633}
1634
1635void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1636{
1637 struct ttm_bo_device *bdev = bo->bdev;
1638
1639 drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);
1640 ttm_mem_io_free_vm(bo);
1641}
1642
1643void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1644{
1645 struct ttm_bo_device *bdev = bo->bdev;
1646 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
1647
1648 ttm_mem_io_lock(man, false);
1649 ttm_bo_unmap_virtual_locked(bo);
1650 ttm_mem_io_unlock(man);
1651}
1652
1653
1654EXPORT_SYMBOL(ttm_bo_unmap_virtual);
1655
1656int ttm_bo_wait(struct ttm_buffer_object *bo,
1657 bool interruptible, bool no_wait)
1658{
1659 long timeout = 15 * HZ;
1660
1661 if (no_wait) {
1662 if (reservation_object_test_signaled_rcu(bo->resv, true))
1663 return 0;
1664 else
1665 return -EBUSY;
1666 }
1667
1668 timeout = reservation_object_wait_timeout_rcu(bo->resv, true,
1669 interruptible, timeout);
1670 if (timeout < 0)
1671 return timeout;
1672
1673 if (timeout == 0)
1674 return -EBUSY;
1675
1676 reservation_object_add_excl_fence(bo->resv, NULL);
1677 return 0;
1678}
1679EXPORT_SYMBOL(ttm_bo_wait);
1680
1681int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1682{
1683 int ret = 0;
1684
1685
1686
1687
1688
1689 ret = ttm_bo_reserve(bo, true, no_wait, NULL);
1690 if (unlikely(ret != 0))
1691 return ret;
1692 ret = ttm_bo_wait(bo, true, no_wait);
1693 if (likely(ret == 0))
1694 atomic_inc(&bo->cpu_writers);
1695 ttm_bo_unreserve(bo);
1696 return ret;
1697}
1698EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
1699
1700void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1701{
1702 atomic_dec(&bo->cpu_writers);
1703}
1704EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
1705
1706
1707
1708
1709
1710
1711static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
1712{
1713 struct ttm_bo_global *glob =
1714 container_of(shrink, struct ttm_bo_global, shrink);
1715 struct ttm_buffer_object *bo;
1716 int ret = -EBUSY;
1717 unsigned i;
1718
1719 spin_lock(&glob->lru_lock);
1720 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
1721 list_for_each_entry(bo, &glob->swap_lru[i], swap) {
1722 ret = __ttm_bo_reserve(bo, false, true, NULL);
1723 if (!ret)
1724 break;
1725 }
1726 if (!ret)
1727 break;
1728 }
1729
1730 if (ret) {
1731 spin_unlock(&glob->lru_lock);
1732 return ret;
1733 }
1734
1735 kref_get(&bo->list_kref);
1736
1737 if (!list_empty(&bo->ddestroy)) {
1738 ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false);
1739 kref_put(&bo->list_kref, ttm_bo_release_list);
1740 return ret;
1741 }
1742
1743 ttm_bo_del_from_lru(bo);
1744 spin_unlock(&glob->lru_lock);
1745
1746
1747
1748
1749
1750 if (bo->mem.mem_type != TTM_PL_SYSTEM ||
1751 bo->ttm->caching_state != tt_cached) {
1752 struct ttm_mem_reg evict_mem;
1753
1754 evict_mem = bo->mem;
1755 evict_mem.mm_node = NULL;
1756 evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1757 evict_mem.mem_type = TTM_PL_SYSTEM;
1758
1759 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
1760 false, false);
1761 if (unlikely(ret != 0))
1762 goto out;
1763 }
1764
1765
1766
1767
1768
1769 ret = ttm_bo_wait(bo, false, false);
1770 if (unlikely(ret != 0))
1771 goto out;
1772
1773 ttm_bo_unmap_virtual(bo);
1774
1775
1776
1777
1778
1779
1780 if (bo->bdev->driver->swap_notify)
1781 bo->bdev->driver->swap_notify(bo);
1782
1783 ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
1784out:
1785
1786
1787
1788
1789
1790
1791
1792 __ttm_bo_unreserve(bo);
1793 kref_put(&bo->list_kref, ttm_bo_release_list);
1794 return ret;
1795}
1796
1797void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1798{
1799 while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
1800 ;
1801}
1802EXPORT_SYMBOL(ttm_bo_swapout_all);
1803
1804
1805
1806
1807
1808
1809
1810int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
1811{
1812 int ret;
1813
1814
1815
1816
1817
1818
1819
1820
1821 ret = mutex_lock_interruptible(&bo->wu_mutex);
1822 if (unlikely(ret != 0))
1823 return -ERESTARTSYS;
1824 if (!ww_mutex_is_locked(&bo->resv->lock))
1825 goto out_unlock;
1826 ret = __ttm_bo_reserve(bo, true, false, NULL);
1827 if (unlikely(ret != 0))
1828 goto out_unlock;
1829 __ttm_bo_unreserve(bo);
1830
1831out_unlock:
1832 mutex_unlock(&bo->wu_mutex);
1833 return ret;
1834}
1835
