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