296void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo)
297{
298 ttm_bo_add_to_lru(bo);
299 atomic_set(&bo->reserved, 0);
300 wakeup(bo);
301}
302
303void ttm_bo_unreserve(struct ttm_buffer_object *bo)
304{
305 struct ttm_bo_global *glob = bo->glob;
306
307 mtx_lock(&glob->lru_lock);
308 ttm_bo_unreserve_locked(bo);
309 mtx_unlock(&glob->lru_lock);
310}
311
312/*
313 * Call bo->mutex locked.
314 */
315static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
316{
317 struct ttm_bo_device *bdev = bo->bdev;
318 struct ttm_bo_global *glob = bo->glob;
319 int ret = 0;
320 uint32_t page_flags = 0;
321
322 TTM_ASSERT_LOCKED(&bo->mutex);
323 bo->ttm = NULL;
324
325 if (bdev->need_dma32)
326 page_flags |= TTM_PAGE_FLAG_DMA32;
327
328 switch (bo->type) {
329 case ttm_bo_type_device:
330 if (zero_alloc)
331 page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
332 case ttm_bo_type_kernel:
333 bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
334 page_flags, glob->dummy_read_page);
335 if (unlikely(bo->ttm == NULL))
336 ret = -ENOMEM;
337 break;
338 case ttm_bo_type_sg:
339 bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
340 page_flags | TTM_PAGE_FLAG_SG,
341 glob->dummy_read_page);
342 if (unlikely(bo->ttm == NULL)) {
343 ret = -ENOMEM;
344 break;
345 }
346 bo->ttm->sg = bo->sg;
347 break;
348 default:
349 printf("[TTM] Illegal buffer object type\n");
350 ret = -EINVAL;
351 break;
352 }
353
354 return ret;
355}
356
357static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
358 struct ttm_mem_reg *mem,
359 bool evict, bool interruptible,
360 bool no_wait_gpu)
361{
362 struct ttm_bo_device *bdev = bo->bdev;
363 bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
364 bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
365 struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
366 struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
367 int ret = 0;
368
369 if (old_is_pci || new_is_pci ||
370 ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
371 ret = ttm_mem_io_lock(old_man, true);
372 if (unlikely(ret != 0))
373 goto out_err;
374 ttm_bo_unmap_virtual_locked(bo);
375 ttm_mem_io_unlock(old_man);
376 }
377
378 /*
379 * Create and bind a ttm if required.
380 */
381
382 if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
383 if (bo->ttm == NULL) {
384 bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
385 ret = ttm_bo_add_ttm(bo, zero);
386 if (ret)
387 goto out_err;
388 }
389
390 ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
391 if (ret)
392 goto out_err;
393
394 if (mem->mem_type != TTM_PL_SYSTEM) {
395 ret = ttm_tt_bind(bo->ttm, mem);
396 if (ret)
397 goto out_err;
398 }
399
400 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
401 if (bdev->driver->move_notify)
402 bdev->driver->move_notify(bo, mem);
403 bo->mem = *mem;
404 mem->mm_node = NULL;
405 goto moved;
406 }
407 }
408
409 if (bdev->driver->move_notify)
410 bdev->driver->move_notify(bo, mem);
411
412 if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
413 !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
414 ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem);
415 else if (bdev->driver->move)
416 ret = bdev->driver->move(bo, evict, interruptible,
417 no_wait_gpu, mem);
418 else
419 ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem);
420
421 if (ret) {
422 if (bdev->driver->move_notify) {
423 struct ttm_mem_reg tmp_mem = *mem;
424 *mem = bo->mem;
425 bo->mem = tmp_mem;
426 bdev->driver->move_notify(bo, mem);
427 bo->mem = *mem;
428 }
429
430 goto out_err;
431 }
432
433moved:
434 if (bo->evicted) {
435 ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
436 if (ret)
437 printf("[TTM] Can not flush read caches\n");
438 bo->evicted = false;
439 }
440
441 if (bo->mem.mm_node) {
442 bo->offset = (bo->mem.start << PAGE_SHIFT) +
443 bdev->man[bo->mem.mem_type].gpu_offset;
444 bo->cur_placement = bo->mem.placement;
445 } else
446 bo->offset = 0;
447
448 return 0;
449
450out_err:
451 new_man = &bdev->man[bo->mem.mem_type];
452 if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
453 ttm_tt_unbind(bo->ttm);
454 ttm_tt_destroy(bo->ttm);
455 bo->ttm = NULL;
456 }
457
458 return ret;
459}
460
461/**
462 * Call bo::reserved.
463 * Will release GPU memory type usage on destruction.
464 * This is the place to put in driver specific hooks to release
465 * driver private resources.
466 * Will release the bo::reserved lock.
467 */
468
469static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
470{
471 if (bo->bdev->driver->move_notify)
472 bo->bdev->driver->move_notify(bo, NULL);
473
474 if (bo->ttm) {
475 ttm_tt_unbind(bo->ttm);
476 ttm_tt_destroy(bo->ttm);
477 bo->ttm = NULL;
478 }
479 ttm_bo_mem_put(bo, &bo->mem);
480
481 atomic_set(&bo->reserved, 0);
482 wakeup(&bo);
483
484 /*
485 * Since the final reference to this bo may not be dropped by
486 * the current task we have to put a memory barrier here to make
487 * sure the changes done in this function are always visible.
488 *
489 * This function only needs protection against the final kref_put.
490 */
491 mb();
492}
493
494static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
495{
496 struct ttm_bo_device *bdev = bo->bdev;
497 struct ttm_bo_global *glob = bo->glob;
498 struct ttm_bo_driver *driver = bdev->driver;
499 void *sync_obj = NULL;
500 int put_count;
501 int ret;
502
503 mtx_lock(&glob->lru_lock);
504 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
505
506 mtx_lock(&bdev->fence_lock);
507 (void) ttm_bo_wait(bo, false, false, true);
508 if (!ret && !bo->sync_obj) {
509 mtx_unlock(&bdev->fence_lock);
510 put_count = ttm_bo_del_from_lru(bo);
511
512 mtx_unlock(&glob->lru_lock);
513 ttm_bo_cleanup_memtype_use(bo);
514
515 ttm_bo_list_ref_sub(bo, put_count, true);
516
517 return;
518 }
519 if (bo->sync_obj)
520 sync_obj = driver->sync_obj_ref(bo->sync_obj);
521 mtx_unlock(&bdev->fence_lock);
522
523 if (!ret) {
524 atomic_set(&bo->reserved, 0);
525 wakeup(bo);
526 }
527
528 refcount_acquire(&bo->list_kref);
529 list_add_tail(&bo->ddestroy, &bdev->ddestroy);
530 mtx_unlock(&glob->lru_lock);
531
532 if (sync_obj) {
533 driver->sync_obj_flush(sync_obj);
534 driver->sync_obj_unref(&sync_obj);
535 }
536 taskqueue_enqueue_timeout(taskqueue_thread, &bdev->wq,
537 ((hz / 100) < 1) ? 1 : hz / 100);
538}
539
540/**
541 * function ttm_bo_cleanup_refs_and_unlock
542 * If bo idle, remove from delayed- and lru lists, and unref.
543 * If not idle, do nothing.
544 *
545 * Must be called with lru_lock and reservation held, this function
546 * will drop both before returning.
547 *
548 * @interruptible Any sleeps should occur interruptibly.
549 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
550 */
551
552static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
553 bool interruptible,
554 bool no_wait_gpu)
555{
556 struct ttm_bo_device *bdev = bo->bdev;
557 struct ttm_bo_driver *driver = bdev->driver;
558 struct ttm_bo_global *glob = bo->glob;
559 int put_count;
560 int ret;
561
562 mtx_lock(&bdev->fence_lock);
563 ret = ttm_bo_wait(bo, false, false, true);
564
565 if (ret && !no_wait_gpu) {
566 void *sync_obj;
567
568 /*
569 * Take a reference to the fence and unreserve,
570 * at this point the buffer should be dead, so
571 * no new sync objects can be attached.
572 */
573 sync_obj = driver->sync_obj_ref(bo->sync_obj);
574 mtx_unlock(&bdev->fence_lock);
575
576 atomic_set(&bo->reserved, 0);
577 wakeup(bo);
578 mtx_unlock(&glob->lru_lock);
579
580 ret = driver->sync_obj_wait(sync_obj, false, interruptible);
581 driver->sync_obj_unref(&sync_obj);
582 if (ret)
583 return ret;
584
585 /*
586 * remove sync_obj with ttm_bo_wait, the wait should be
587 * finished, and no new wait object should have been added.
588 */
589 mtx_lock(&bdev->fence_lock);
590 ret = ttm_bo_wait(bo, false, false, true);
591 mtx_unlock(&bdev->fence_lock);
592 if (ret)
593 return ret;
594
595 mtx_lock(&glob->lru_lock);
596 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
597
598 /*
599 * We raced, and lost, someone else holds the reservation now,
600 * and is probably busy in ttm_bo_cleanup_memtype_use.
601 *
602 * Even if it's not the case, because we finished waiting any
603 * delayed destruction would succeed, so just return success
604 * here.
605 */
606 if (ret) {
607 mtx_unlock(&glob->lru_lock);
608 return 0;
609 }
610 } else
611 mtx_unlock(&bdev->fence_lock);
612
613 if (ret || unlikely(list_empty(&bo->ddestroy))) {
614 atomic_set(&bo->reserved, 0);
615 wakeup(bo);
616 mtx_unlock(&glob->lru_lock);
617 return ret;
618 }
619
620 put_count = ttm_bo_del_from_lru(bo);
621 list_del_init(&bo->ddestroy);
622 ++put_count;
623
624 mtx_unlock(&glob->lru_lock);
625 ttm_bo_cleanup_memtype_use(bo);
626
627 ttm_bo_list_ref_sub(bo, put_count, true);
628
629 return 0;
630}
631
632/**
633 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
634 * encountered buffers.
635 */
636
637static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
638{
639 struct ttm_bo_global *glob = bdev->glob;
640 struct ttm_buffer_object *entry = NULL;
641 int ret = 0;
642
643 mtx_lock(&glob->lru_lock);
644 if (list_empty(&bdev->ddestroy))
645 goto out_unlock;
646
647 entry = list_first_entry(&bdev->ddestroy,
648 struct ttm_buffer_object, ddestroy);
649 refcount_acquire(&entry->list_kref);
650
651 for (;;) {
652 struct ttm_buffer_object *nentry = NULL;
653
654 if (entry->ddestroy.next != &bdev->ddestroy) {
655 nentry = list_first_entry(&entry->ddestroy,
656 struct ttm_buffer_object, ddestroy);
657 refcount_acquire(&nentry->list_kref);
658 }
659
660 ret = ttm_bo_reserve_nolru(entry, false, true, false, 0);
661 if (remove_all && ret) {
662 ret = ttm_bo_reserve_nolru(entry, false, false,
663 false, 0);
664 }
665
666 if (!ret)
667 ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
668 !remove_all);
669 else
670 mtx_unlock(&glob->lru_lock);
671
672 if (refcount_release(&entry->list_kref))
673 ttm_bo_release_list(entry);
674 entry = nentry;
675
676 if (ret || !entry)
677 goto out;
678
679 mtx_lock(&glob->lru_lock);
680 if (list_empty(&entry->ddestroy))
681 break;
682 }
683
684out_unlock:
685 mtx_unlock(&glob->lru_lock);
686out:
687 if (entry && refcount_release(&entry->list_kref))
688 ttm_bo_release_list(entry);
689 return ret;
690}
691
692static void ttm_bo_delayed_workqueue(void *arg, int pending __unused)
693{
694 struct ttm_bo_device *bdev = arg;
695
696 if (ttm_bo_delayed_delete(bdev, false)) {
697 taskqueue_enqueue_timeout(taskqueue_thread, &bdev->wq,
698 ((hz / 100) < 1) ? 1 : hz / 100);
699 }
700}
701
702static void ttm_bo_release(struct ttm_buffer_object *bo)
703{
704 struct ttm_bo_device *bdev = bo->bdev;
705 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
706
707 rw_wlock(&bdev->vm_lock);
708 if (likely(bo->vm_node != NULL)) {
709 RB_REMOVE(ttm_bo_device_buffer_objects,
710 &bdev->addr_space_rb, bo);
711 drm_mm_put_block(bo->vm_node);
712 bo->vm_node = NULL;
713 }
714 rw_wunlock(&bdev->vm_lock);
715 ttm_mem_io_lock(man, false);
716 ttm_mem_io_free_vm(bo);
717 ttm_mem_io_unlock(man);
718 ttm_bo_cleanup_refs_or_queue(bo);
719 if (refcount_release(&bo->list_kref))
720 ttm_bo_release_list(bo);
721}
722
723void ttm_bo_unref(struct ttm_buffer_object **p_bo)
724{
725 struct ttm_buffer_object *bo = *p_bo;
726
727 *p_bo = NULL;
728 if (refcount_release(&bo->kref))
729 ttm_bo_release(bo);
730}
731
732int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
733{
734 int pending;
735
736 taskqueue_cancel_timeout(taskqueue_thread, &bdev->wq, &pending);
737 if (pending)
738 taskqueue_drain_timeout(taskqueue_thread, &bdev->wq);
739 return (pending);
740}
741
742void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
743{
744 if (resched) {
745 taskqueue_enqueue_timeout(taskqueue_thread, &bdev->wq,
746 ((hz / 100) < 1) ? 1 : hz / 100);
747 }
748}
749
750static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
751 bool no_wait_gpu)
752{
753 struct ttm_bo_device *bdev = bo->bdev;
754 struct ttm_mem_reg evict_mem;
755 struct ttm_placement placement;
756 int ret = 0;
757
758 mtx_lock(&bdev->fence_lock);
759 ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
760 mtx_unlock(&bdev->fence_lock);
761
762 if (unlikely(ret != 0)) {
763 if (ret != -ERESTART) {
764 printf("[TTM] Failed to expire sync object before buffer eviction\n");
765 }
766 goto out;
767 }
768
769 MPASS(ttm_bo_is_reserved(bo));
770
771 evict_mem = bo->mem;
772 evict_mem.mm_node = NULL;
773 evict_mem.bus.io_reserved_vm = false;
774 evict_mem.bus.io_reserved_count = 0;
775
776 placement.fpfn = 0;
777 placement.lpfn = 0;
778 placement.num_placement = 0;
779 placement.num_busy_placement = 0;
780 bdev->driver->evict_flags(bo, &placement);
781 ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
782 no_wait_gpu);
783 if (ret) {
784 if (ret != -ERESTART) {
785 printf("[TTM] Failed to find memory space for buffer 0x%p eviction\n",
786 bo);
787 ttm_bo_mem_space_debug(bo, &placement);
788 }
789 goto out;
790 }
791
792 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
793 no_wait_gpu);
794 if (ret) {
795 if (ret != -ERESTART)
796 printf("[TTM] Buffer eviction failed\n");
797 ttm_bo_mem_put(bo, &evict_mem);
798 goto out;
799 }
800 bo->evicted = true;
801out:
802 return ret;
803}
804
805static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
806 uint32_t mem_type,
807 bool interruptible,
808 bool no_wait_gpu)
809{
810 struct ttm_bo_global *glob = bdev->glob;
811 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
812 struct ttm_buffer_object *bo;
813 int ret = -EBUSY, put_count;
814
815 mtx_lock(&glob->lru_lock);
816 list_for_each_entry(bo, &man->lru, lru) {
817 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
818 if (!ret)
819 break;
820 }
821
822 if (ret) {
823 mtx_unlock(&glob->lru_lock);
824 return ret;
825 }
826
827 refcount_acquire(&bo->list_kref);
828
829 if (!list_empty(&bo->ddestroy)) {
830 ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible,
831 no_wait_gpu);
832 if (refcount_release(&bo->list_kref))
833 ttm_bo_release_list(bo);
834 return ret;
835 }
836
837 put_count = ttm_bo_del_from_lru(bo);
838 mtx_unlock(&glob->lru_lock);
839
840 MPASS(ret == 0);
841
842 ttm_bo_list_ref_sub(bo, put_count, true);
843
844 ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
845 ttm_bo_unreserve(bo);
846
847 if (refcount_release(&bo->list_kref))
848 ttm_bo_release_list(bo);
849 return ret;
850}
851
852void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
853{
854 struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
855
856 if (mem->mm_node)
857 (*man->func->put_node)(man, mem);
858}
859
860/**
861 * Repeatedly evict memory from the LRU for @mem_type until we create enough
862 * space, or we've evicted everything and there isn't enough space.
863 */
864static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
865 uint32_t mem_type,
866 struct ttm_placement *placement,
867 struct ttm_mem_reg *mem,
868 bool interruptible,
869 bool no_wait_gpu)
870{
871 struct ttm_bo_device *bdev = bo->bdev;
872 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
873 int ret;
874
875 do {
876 ret = (*man->func->get_node)(man, bo, placement, mem);
877 if (unlikely(ret != 0))
878 return ret;
879 if (mem->mm_node)
880 break;
881 ret = ttm_mem_evict_first(bdev, mem_type,
882 interruptible, no_wait_gpu);
883 if (unlikely(ret != 0))
884 return ret;
885 } while (1);
886 if (mem->mm_node == NULL)
887 return -ENOMEM;
888 mem->mem_type = mem_type;
889 return 0;
890}
891
892static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
893 uint32_t cur_placement,
894 uint32_t proposed_placement)
895{
896 uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
897 uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
898
899 /**
900 * Keep current caching if possible.
901 */
902
903 if ((cur_placement & caching) != 0)
904 result |= (cur_placement & caching);
905 else if ((man->default_caching & caching) != 0)
906 result |= man->default_caching;
907 else if ((TTM_PL_FLAG_CACHED & caching) != 0)
908 result |= TTM_PL_FLAG_CACHED;
909 else if ((TTM_PL_FLAG_WC & caching) != 0)
910 result |= TTM_PL_FLAG_WC;
911 else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
912 result |= TTM_PL_FLAG_UNCACHED;
913
914 return result;
915}
916
917static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
918 uint32_t mem_type,
919 uint32_t proposed_placement,
920 uint32_t *masked_placement)
921{
922 uint32_t cur_flags = ttm_bo_type_flags(mem_type);
923
924 if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0)
925 return false;
926
927 if ((proposed_placement & man->available_caching) == 0)
928 return false;
929
930 cur_flags |= (proposed_placement & man->available_caching);
931
932 *masked_placement = cur_flags;
933 return true;
934}
935
936/**
937 * Creates space for memory region @mem according to its type.
938 *
939 * This function first searches for free space in compatible memory types in
940 * the priority order defined by the driver. If free space isn't found, then
941 * ttm_bo_mem_force_space is attempted in priority order to evict and find
942 * space.
943 */
944int ttm_bo_mem_space(struct ttm_buffer_object *bo,
945 struct ttm_placement *placement,
946 struct ttm_mem_reg *mem,
947 bool interruptible,
948 bool no_wait_gpu)
949{
950 struct ttm_bo_device *bdev = bo->bdev;
951 struct ttm_mem_type_manager *man;
952 uint32_t mem_type = TTM_PL_SYSTEM;
953 uint32_t cur_flags = 0;
954 bool type_found = false;
955 bool type_ok = false;
956 bool has_erestartsys = false;
957 int i, ret;
958
959 mem->mm_node = NULL;
960 for (i = 0; i < placement->num_placement; ++i) {
961 ret = ttm_mem_type_from_flags(placement->placement[i],
962 &mem_type);
963 if (ret)
964 return ret;
965 man = &bdev->man[mem_type];
966
967 type_ok = ttm_bo_mt_compatible(man,
968 mem_type,
969 placement->placement[i],
970 &cur_flags);
971
972 if (!type_ok)
973 continue;
974
975 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
976 cur_flags);
977 /*
978 * Use the access and other non-mapping-related flag bits from
979 * the memory placement flags to the current flags
980 */
981 ttm_flag_masked(&cur_flags, placement->placement[i],
982 ~TTM_PL_MASK_MEMTYPE);
983
984 if (mem_type == TTM_PL_SYSTEM)
985 break;
986
987 if (man->has_type && man->use_type) {
988 type_found = true;
989 ret = (*man->func->get_node)(man, bo, placement, mem);
990 if (unlikely(ret))
991 return ret;
992 }
993 if (mem->mm_node)
994 break;
995 }
996
997 if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
998 mem->mem_type = mem_type;
999 mem->placement = cur_flags;
1000 return 0;
1001 }
1002
1003 if (!type_found)
1004 return -EINVAL;
1005
1006 for (i = 0; i < placement->num_busy_placement; ++i) {
1007 ret = ttm_mem_type_from_flags(placement->busy_placement[i],
1008 &mem_type);
1009 if (ret)
1010 return ret;
1011 man = &bdev->man[mem_type];
1012 if (!man->has_type)
1013 continue;
1014 if (!ttm_bo_mt_compatible(man,
1015 mem_type,
1016 placement->busy_placement[i],
1017 &cur_flags))
1018 continue;
1019
1020 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
1021 cur_flags);
1022 /*
1023 * Use the access and other non-mapping-related flag bits from
1024 * the memory placement flags to the current flags
1025 */
1026 ttm_flag_masked(&cur_flags, placement->busy_placement[i],
1027 ~TTM_PL_MASK_MEMTYPE);
1028
1029
1030 if (mem_type == TTM_PL_SYSTEM) {
1031 mem->mem_type = mem_type;
1032 mem->placement = cur_flags;
1033 mem->mm_node = NULL;
1034 return 0;
1035 }
1036
1037 ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,
1038 interruptible, no_wait_gpu);
1039 if (ret == 0 && mem->mm_node) {
1040 mem->placement = cur_flags;
1041 return 0;
1042 }
1043 if (ret == -ERESTART)
1044 has_erestartsys = true;
1045 }
1046 ret = (has_erestartsys) ? -ERESTART : -ENOMEM;
1047 return ret;
1048}
1049
1050static
1051int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
1052 struct ttm_placement *placement,
1053 bool interruptible,
1054 bool no_wait_gpu)
1055{
1056 int ret = 0;
1057 struct ttm_mem_reg mem;
1058 struct ttm_bo_device *bdev = bo->bdev;
1059
1060 MPASS(ttm_bo_is_reserved(bo));
1061
1062 /*
1063 * FIXME: It's possible to pipeline buffer moves.
1064 * Have the driver move function wait for idle when necessary,
1065 * instead of doing it here.
1066 */
1067 mtx_lock(&bdev->fence_lock);
1068 ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
1069 mtx_unlock(&bdev->fence_lock);
1070 if (ret)
1071 return ret;
1072 mem.num_pages = bo->num_pages;
1073 mem.size = mem.num_pages << PAGE_SHIFT;
1074 mem.page_alignment = bo->mem.page_alignment;
1075 mem.bus.io_reserved_vm = false;
1076 mem.bus.io_reserved_count = 0;
1077 /*
1078 * Determine where to move the buffer.
1079 */
1080 ret = ttm_bo_mem_space(bo, placement, &mem,
1081 interruptible, no_wait_gpu);
1082 if (ret)
1083 goto out_unlock;
1084 ret = ttm_bo_handle_move_mem(bo, &mem, false,
1085 interruptible, no_wait_gpu);
1086out_unlock:
1087 if (ret && mem.mm_node)
1088 ttm_bo_mem_put(bo, &mem);
1089 return ret;
1090}
1091
1092static int ttm_bo_mem_compat(struct ttm_placement *placement,
1093 struct ttm_mem_reg *mem)
1094{
1095 int i;
1096
1097 if (mem->mm_node && placement->lpfn != 0 &&
1098 (mem->start < placement->fpfn ||
1099 mem->start + mem->num_pages > placement->lpfn))
1100 return -1;
1101
1102 for (i = 0; i < placement->num_placement; i++) {
1103 if ((placement->placement[i] & mem->placement &
1104 TTM_PL_MASK_CACHING) &&
1105 (placement->placement[i] & mem->placement &
1106 TTM_PL_MASK_MEM))
1107 return i;
1108 }
1109 return -1;
1110}
1111
1112int ttm_bo_validate(struct ttm_buffer_object *bo,
1113 struct ttm_placement *placement,
1114 bool interruptible,
1115 bool no_wait_gpu)
1116{
1117 int ret;
1118
1119 MPASS(ttm_bo_is_reserved(bo));
1120 /* Check that range is valid */
1121 if (placement->lpfn || placement->fpfn)
1122 if (placement->fpfn > placement->lpfn ||
1123 (placement->lpfn - placement->fpfn) < bo->num_pages)
1124 return -EINVAL;
1125 /*
1126 * Check whether we need to move buffer.
1127 */
1128 ret = ttm_bo_mem_compat(placement, &bo->mem);
1129 if (ret < 0) {
1130 ret = ttm_bo_move_buffer(bo, placement, interruptible,
1131 no_wait_gpu);
1132 if (ret)
1133 return ret;
1134 } else {
1135 /*
1136 * Use the access and other non-mapping-related flag bits from
1137 * the compatible memory placement flags to the active flags
1138 */
1139 ttm_flag_masked(&bo->mem.placement, placement->placement[ret],
1140 ~TTM_PL_MASK_MEMTYPE);
1141 }
1142 /*
1143 * We might need to add a TTM.
1144 */
1145 if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1146 ret = ttm_bo_add_ttm(bo, true);
1147 if (ret)
1148 return ret;
1149 }
1150 return 0;
1151}
1152
1153int ttm_bo_check_placement(struct ttm_buffer_object *bo,
1154 struct ttm_placement *placement)
1155{
1156 MPASS(!((placement->fpfn || placement->lpfn) &&
1157 (bo->mem.num_pages > (placement->lpfn - placement->fpfn))));
1158
1159 return 0;
1160}
1161
1162int ttm_bo_init(struct ttm_bo_device *bdev,
1163 struct ttm_buffer_object *bo,
1164 unsigned long size,
1165 enum ttm_bo_type type,
1166 struct ttm_placement *placement,
1167 uint32_t page_alignment,
1168 bool interruptible,
1169 struct vm_object *persistent_swap_storage,
1170 size_t acc_size,
1171 struct sg_table *sg,
1172 void (*destroy) (struct ttm_buffer_object *))
1173{
1174 int ret = 0;
1175 unsigned long num_pages;
1176 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1177
1178 ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
1179 if (ret) {
1180 printf("[TTM] Out of kernel memory\n");
1181 if (destroy)
1182 (*destroy)(bo);
1183 else
1184 free(bo, M_TTM_BO);
1185 return -ENOMEM;
1186 }
1187
1188 num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1189 if (num_pages == 0) {
1190 printf("[TTM] Illegal buffer object size\n");
1191 if (destroy)
1192 (*destroy)(bo);
1193 else
1194 free(bo, M_TTM_BO);
1195 ttm_mem_global_free(mem_glob, acc_size);
1196 return -EINVAL;
1197 }
1198 bo->destroy = destroy;
1199
1200 refcount_init(&bo->kref, 1);
1201 refcount_init(&bo->list_kref, 1);
1202 atomic_set(&bo->cpu_writers, 0);
1203 atomic_set(&bo->reserved, 1);
1204 INIT_LIST_HEAD(&bo->lru);
1205 INIT_LIST_HEAD(&bo->ddestroy);
1206 INIT_LIST_HEAD(&bo->swap);
1207 INIT_LIST_HEAD(&bo->io_reserve_lru);
1208 bo->bdev = bdev;
1209 bo->glob = bdev->glob;
1210 bo->type = type;
1211 bo->num_pages = num_pages;
1212 bo->mem.size = num_pages << PAGE_SHIFT;
1213 bo->mem.mem_type = TTM_PL_SYSTEM;
1214 bo->mem.num_pages = bo->num_pages;
1215 bo->mem.mm_node = NULL;
1216 bo->mem.page_alignment = page_alignment;
1217 bo->mem.bus.io_reserved_vm = false;
1218 bo->mem.bus.io_reserved_count = 0;
1219 bo->priv_flags = 0;
1220 bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1221 bo->seq_valid = false;
1222 bo->persistent_swap_storage = persistent_swap_storage;
1223 bo->acc_size = acc_size;
1224 bo->sg = sg;
1225 atomic_inc(&bo->glob->bo_count);
1226
1227 ret = ttm_bo_check_placement(bo, placement);
1228 if (unlikely(ret != 0))
1229 goto out_err;
1230
1231 /*
1232 * For ttm_bo_type_device buffers, allocate
1233 * address space from the device.
1234 */
1235 if (bo->type == ttm_bo_type_device ||
1236 bo->type == ttm_bo_type_sg) {
1237 ret = ttm_bo_setup_vm(bo);
1238 if (ret)
1239 goto out_err;
1240 }
1241
1242 ret = ttm_bo_validate(bo, placement, interruptible, false);
1243 if (ret)
1244 goto out_err;
1245
1246 ttm_bo_unreserve(bo);
1247 return 0;
1248
1249out_err:
1250 ttm_bo_unreserve(bo);
1251 ttm_bo_unref(&bo);
1252
1253 return ret;
1254}
1255
1256size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
1257 unsigned long bo_size,
1258 unsigned struct_size)
1259{
1260 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1261 size_t size = 0;
1262
1263 size += ttm_round_pot(struct_size);
1264 size += PAGE_ALIGN(npages * sizeof(void *));
1265 size += ttm_round_pot(sizeof(struct ttm_tt));
1266 return size;
1267}
1268
1269size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
1270 unsigned long bo_size,
1271 unsigned struct_size)
1272{
1273 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1274 size_t size = 0;
1275
1276 size += ttm_round_pot(struct_size);
1277 size += PAGE_ALIGN(npages * sizeof(void *));
1278 size += PAGE_ALIGN(npages * sizeof(dma_addr_t));
1279 size += ttm_round_pot(sizeof(struct ttm_dma_tt));
1280 return size;
1281}
1282
1283int ttm_bo_create(struct ttm_bo_device *bdev,
1284 unsigned long size,
1285 enum ttm_bo_type type,
1286 struct ttm_placement *placement,
1287 uint32_t page_alignment,
1288 bool interruptible,
1289 struct vm_object *persistent_swap_storage,
1290 struct ttm_buffer_object **p_bo)
1291{
1292 struct ttm_buffer_object *bo;
1293 size_t acc_size;
1294 int ret;
1295
1296 bo = malloc(sizeof(*bo), M_TTM_BO, M_WAITOK | M_ZERO);
1297 acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
1298 ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1299 interruptible, persistent_swap_storage, acc_size,
1300 NULL, NULL);
1301 if (likely(ret == 0))
1302 *p_bo = bo;
1303
1304 return ret;
1305}
1306
1307static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1308 unsigned mem_type, bool allow_errors)
1309{
1310 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1311 struct ttm_bo_global *glob = bdev->glob;
1312 int ret;
1313
1314 /*
1315 * Can't use standard list traversal since we're unlocking.
1316 */
1317
1318 mtx_lock(&glob->lru_lock);
1319 while (!list_empty(&man->lru)) {
1320 mtx_unlock(&glob->lru_lock);
1321 ret = ttm_mem_evict_first(bdev, mem_type, false, false);
1322 if (ret) {
1323 if (allow_errors) {
1324 return ret;
1325 } else {
1326 printf("[TTM] Cleanup eviction failed\n");
1327 }
1328 }
1329 mtx_lock(&glob->lru_lock);
1330 }
1331 mtx_unlock(&glob->lru_lock);
1332 return 0;
1333}
1334
1335int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1336{
1337 struct ttm_mem_type_manager *man;
1338 int ret = -EINVAL;
1339
1340 if (mem_type >= TTM_NUM_MEM_TYPES) {
1341 printf("[TTM] Illegal memory type %d\n", mem_type);
1342 return ret;
1343 }
1344 man = &bdev->man[mem_type];
1345
1346 if (!man->has_type) {
1347 printf("[TTM] Trying to take down uninitialized memory manager type %u\n",
1348 mem_type);
1349 return ret;
1350 }
1351
1352 man->use_type = false;
1353 man->has_type = false;
1354
1355 ret = 0;
1356 if (mem_type > 0) {
1357 ttm_bo_force_list_clean(bdev, mem_type, false);
1358
1359 ret = (*man->func->takedown)(man);
1360 }
1361
1362 return ret;
1363}
1364
1365int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1366{
1367 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1368
1369 if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1370 printf("[TTM] Illegal memory manager memory type %u\n", mem_type);
1371 return -EINVAL;
1372 }
1373
1374 if (!man->has_type) {
1375 printf("[TTM] Memory type %u has not been initialized\n", mem_type);
1376 return 0;
1377 }
1378
1379 return ttm_bo_force_list_clean(bdev, mem_type, true);
1380}
1381
1382int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1383 unsigned long p_size)
1384{
1385 int ret = -EINVAL;
1386 struct ttm_mem_type_manager *man;
1387
1388 MPASS(type < TTM_NUM_MEM_TYPES);
1389 man = &bdev->man[type];
1390 MPASS(!man->has_type);
1391 man->io_reserve_fastpath = true;
1392 man->use_io_reserve_lru = false;
1393 sx_init(&man->io_reserve_mutex, "ttmman");
1394 INIT_LIST_HEAD(&man->io_reserve_lru);
1395
1396 ret = bdev->driver->init_mem_type(bdev, type, man);
1397 if (ret)
1398 return ret;
1399 man->bdev = bdev;
1400
1401 ret = 0;
1402 if (type != TTM_PL_SYSTEM) {
1403 ret = (*man->func->init)(man, p_size);
1404 if (ret)
1405 return ret;
1406 }
1407 man->has_type = true;
1408 man->use_type = true;
1409 man->size = p_size;
1410
1411 INIT_LIST_HEAD(&man->lru);
1412
1413 return 0;
1414}
1415
1416static void ttm_bo_global_kobj_release(struct ttm_bo_global *glob)
1417{
1418
1419 ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
1420 vm_page_free(glob->dummy_read_page);
1421}
1422
1423void ttm_bo_global_release(struct drm_global_reference *ref)
1424{
1425 struct ttm_bo_global *glob = ref->object;
1426
1427 if (refcount_release(&glob->kobj_ref))
1428 ttm_bo_global_kobj_release(glob);
1429}
1430
1431int ttm_bo_global_init(struct drm_global_reference *ref)
1432{
1433 struct ttm_bo_global_ref *bo_ref =
1434 container_of(ref, struct ttm_bo_global_ref, ref);
1435 struct ttm_bo_global *glob = ref->object;
1436 int ret;
1437
1438 sx_init(&glob->device_list_mutex, "ttmdlm");
1439 mtx_init(&glob->lru_lock, "ttmlru", NULL, MTX_DEF);
1440 glob->mem_glob = bo_ref->mem_glob;
1441 glob->dummy_read_page = vm_page_alloc_contig(NULL, 0,
1442 VM_ALLOC_NORMAL | VM_ALLOC_NOOBJ,
1443 1, 0, VM_MAX_ADDRESS, PAGE_SIZE, 0, VM_MEMATTR_UNCACHEABLE);
1444
1445 if (unlikely(glob->dummy_read_page == NULL)) {
1446 ret = -ENOMEM;
1447 goto out_no_drp;
1448 }
1449
1450 INIT_LIST_HEAD(&glob->swap_lru);
1451 INIT_LIST_HEAD(&glob->device_list);
1452
1453 ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
1454 ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
1455 if (unlikely(ret != 0)) {
1456 printf("[TTM] Could not register buffer object swapout\n");
1457 goto out_no_shrink;
1458 }
1459
1460 atomic_set(&glob->bo_count, 0);
1461
1462 refcount_init(&glob->kobj_ref, 1);
1463 return (0);
1464
1465out_no_shrink:
1466 vm_page_free(glob->dummy_read_page);
1467out_no_drp:
1468 free(glob, M_DRM_GLOBAL);
1469 return ret;
1470}
1471
1472int ttm_bo_device_release(struct ttm_bo_device *bdev)
1473{
1474 int ret = 0;
1475 unsigned i = TTM_NUM_MEM_TYPES;
1476 struct ttm_mem_type_manager *man;
1477 struct ttm_bo_global *glob = bdev->glob;
1478
1479 while (i--) {
1480 man = &bdev->man[i];
1481 if (man->has_type) {
1482 man->use_type = false;
1483 if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1484 ret = -EBUSY;
1485 printf("[TTM] DRM memory manager type %d is not clean\n",
1486 i);
1487 }
1488 man->has_type = false;
1489 }
1490 }
1491
1492 sx_xlock(&glob->device_list_mutex);
1493 list_del(&bdev->device_list);
1494 sx_xunlock(&glob->device_list_mutex);
1495
1496 if (taskqueue_cancel_timeout(taskqueue_thread, &bdev->wq, NULL))
1497 taskqueue_drain_timeout(taskqueue_thread, &bdev->wq);
1498
1499 while (ttm_bo_delayed_delete(bdev, true))
1500 ;
1501
1502 mtx_lock(&glob->lru_lock);
1503 if (list_empty(&bdev->ddestroy))
1504 TTM_DEBUG("Delayed destroy list was clean\n");
1505
1506 if (list_empty(&bdev->man[0].lru))
1507 TTM_DEBUG("Swap list was clean\n");
1508 mtx_unlock(&glob->lru_lock);
1509
1510 MPASS(drm_mm_clean(&bdev->addr_space_mm));
1511 rw_wlock(&bdev->vm_lock);
1512 drm_mm_takedown(&bdev->addr_space_mm);
1513 rw_wunlock(&bdev->vm_lock);
1514
1515 return ret;
1516}
1517
1518int ttm_bo_device_init(struct ttm_bo_device *bdev,
1519 struct ttm_bo_global *glob,
1520 struct ttm_bo_driver *driver,
1521 uint64_t file_page_offset,
1522 bool need_dma32)
1523{
1524 int ret = -EINVAL;
1525
1526 rw_init(&bdev->vm_lock, "ttmvml");
1527 bdev->driver = driver;
1528
1529 memset(bdev->man, 0, sizeof(bdev->man));
1530
1531 /*
1532 * Initialize the system memory buffer type.
1533 * Other types need to be driver / IOCTL initialized.
1534 */
1535 ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1536 if (unlikely(ret != 0))
1537 goto out_no_sys;
1538
1539 RB_INIT(&bdev->addr_space_rb);
1540 ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
1541 if (unlikely(ret != 0))
1542 goto out_no_addr_mm;
1543
1544 TIMEOUT_TASK_INIT(taskqueue_thread, &bdev->wq, 0,
1545 ttm_bo_delayed_workqueue, bdev);
1546 INIT_LIST_HEAD(&bdev->ddestroy);
1547 bdev->dev_mapping = NULL;
1548 bdev->glob = glob;
1549 bdev->need_dma32 = need_dma32;
1550 bdev->val_seq = 0;
1551 mtx_init(&bdev->fence_lock, "ttmfence", NULL, MTX_DEF);
1552 sx_xlock(&glob->device_list_mutex);
1553 list_add_tail(&bdev->device_list, &glob->device_list);
1554 sx_xunlock(&glob->device_list_mutex);
1555
1556 return 0;
1557out_no_addr_mm:
1558 ttm_bo_clean_mm(bdev, 0);
1559out_no_sys:
1560 return ret;
1561}
1562
1563/*
1564 * buffer object vm functions.
1565 */
1566
1567bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1568{
1569 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1570
1571 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1572 if (mem->mem_type == TTM_PL_SYSTEM)
1573 return false;
1574
1575 if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1576 return false;
1577
1578 if (mem->placement & TTM_PL_FLAG_CACHED)
1579 return false;
1580 }
1581 return true;
1582}
1583
1584void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1585{
1586 struct ttm_bo_device *bdev = bo->bdev;
1587 /* off_t offset = (off_t)bo->addr_space_offset;XXXKIB */
1588 /* off_t holelen = ((off_t)bo->mem.num_pages) << PAGE_SHIFT;XXXKIB */
1589
1590 if (!bdev->dev_mapping)
1591 return;
1592 /* unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); XXXKIB */
1593 ttm_mem_io_free_vm(bo);
1594}
1595
1596void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1597{
1598 struct ttm_bo_device *bdev = bo->bdev;
1599 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
1600
1601 ttm_mem_io_lock(man, false);
1602 ttm_bo_unmap_virtual_locked(bo);
1603 ttm_mem_io_unlock(man);
1604}
1605
1606static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
1607{
1608 struct ttm_bo_device *bdev = bo->bdev;
1609
1610 /* The caller acquired bdev->vm_lock. */
1611 RB_INSERT(ttm_bo_device_buffer_objects, &bdev->addr_space_rb, bo);
1612}
1613
1614/**
1615 * ttm_bo_setup_vm:
1616 *
1617 * @bo: the buffer to allocate address space for
1618 *
1619 * Allocate address space in the drm device so that applications
1620 * can mmap the buffer and access the contents. This only
1621 * applies to ttm_bo_type_device objects as others are not
1622 * placed in the drm device address space.
1623 */
1624
1625static int ttm_bo_setup_vm(struct ttm_buffer_object *bo)
1626{
1627 struct ttm_bo_device *bdev = bo->bdev;
1628 int ret;
1629
1630retry_pre_get:
1631 ret = drm_mm_pre_get(&bdev->addr_space_mm);
1632 if (unlikely(ret != 0))
1633 return ret;
1634
1635 rw_wlock(&bdev->vm_lock);
1636 bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm,
1637 bo->mem.num_pages, 0, 0);
1638
1639 if (unlikely(bo->vm_node == NULL)) {
1640 ret = -ENOMEM;
1641 goto out_unlock;
1642 }
1643
1644 bo->vm_node = drm_mm_get_block_atomic(bo->vm_node,
1645 bo->mem.num_pages, 0);
1646
1647 if (unlikely(bo->vm_node == NULL)) {
1648 rw_wunlock(&bdev->vm_lock);
1649 goto retry_pre_get;
1650 }
1651
1652 ttm_bo_vm_insert_rb(bo);
1653 rw_wunlock(&bdev->vm_lock);
1654 bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT;
1655
1656 return 0;
1657out_unlock:
1658 rw_wunlock(&bdev->vm_lock);
1659 return ret;
1660}
1661
1662int ttm_bo_wait(struct ttm_buffer_object *bo,
1663 bool lazy, bool interruptible, bool no_wait)
1664{
1665 struct ttm_bo_driver *driver = bo->bdev->driver;
1666 struct ttm_bo_device *bdev = bo->bdev;
1667 void *sync_obj;
1668 int ret = 0;
1669
1670 if (likely(bo->sync_obj == NULL))
1671 return 0;
1672
1673 while (bo->sync_obj) {
1674
1675 if (driver->sync_obj_signaled(bo->sync_obj)) {
1676 void *tmp_obj = bo->sync_obj;
1677 bo->sync_obj = NULL;
1678 clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
1679 mtx_unlock(&bdev->fence_lock);
1680 driver->sync_obj_unref(&tmp_obj);
1681 mtx_lock(&bdev->fence_lock);
1682 continue;
1683 }
1684
1685 if (no_wait)
1686 return -EBUSY;
1687
1688 sync_obj = driver->sync_obj_ref(bo->sync_obj);
1689 mtx_unlock(&bdev->fence_lock);
1690 ret = driver->sync_obj_wait(sync_obj,
1691 lazy, interruptible);
1692 if (unlikely(ret != 0)) {
1693 driver->sync_obj_unref(&sync_obj);
1694 mtx_lock(&bdev->fence_lock);
1695 return ret;
1696 }
1697 mtx_lock(&bdev->fence_lock);
1698 if (likely(bo->sync_obj == sync_obj)) {
1699 void *tmp_obj = bo->sync_obj;
1700 bo->sync_obj = NULL;
1701 clear_bit(TTM_BO_PRIV_FLAG_MOVING,
1702 &bo->priv_flags);
1703 mtx_unlock(&bdev->fence_lock);
1704 driver->sync_obj_unref(&sync_obj);
1705 driver->sync_obj_unref(&tmp_obj);
1706 mtx_lock(&bdev->fence_lock);
1707 } else {
1708 mtx_unlock(&bdev->fence_lock);
1709 driver->sync_obj_unref(&sync_obj);
1710 mtx_lock(&bdev->fence_lock);
1711 }
1712 }
1713 return 0;
1714}
1715
1716int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1717{
1718 struct ttm_bo_device *bdev = bo->bdev;
1719 int ret = 0;
1720
1721 /*
1722 * Using ttm_bo_reserve makes sure the lru lists are updated.
1723 */
1724
1725 ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
1726 if (unlikely(ret != 0))
1727 return ret;
1728 mtx_lock(&bdev->fence_lock);
1729 ret = ttm_bo_wait(bo, false, true, no_wait);
1730 mtx_unlock(&bdev->fence_lock);
1731 if (likely(ret == 0))
1732 atomic_inc(&bo->cpu_writers);
1733 ttm_bo_unreserve(bo);
1734 return ret;
1735}
1736
1737void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1738{
1739 atomic_dec(&bo->cpu_writers);
1740}
1741
1742/**
1743 * A buffer object shrink method that tries to swap out the first
1744 * buffer object on the bo_global::swap_lru list.
1745 */
1746
1747static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
1748{
1749 struct ttm_bo_global *glob =
1750 container_of(shrink, struct ttm_bo_global, shrink);
1751 struct ttm_buffer_object *bo;
1752 int ret = -EBUSY;
1753 int put_count;
1754 uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
1755
1756 mtx_lock(&glob->lru_lock);
1757 list_for_each_entry(bo, &glob->swap_lru, swap) {
1758 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
1759 if (!ret)
1760 break;
1761 }
1762
1763 if (ret) {
1764 mtx_unlock(&glob->lru_lock);
1765 return ret;
1766 }
1767
1768 refcount_acquire(&bo->list_kref);
1769
1770 if (!list_empty(&bo->ddestroy)) {
1771 ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false);
1772 if (refcount_release(&bo->list_kref))
1773 ttm_bo_release_list(bo);
1774 return ret;
1775 }
1776
1777 put_count = ttm_bo_del_from_lru(bo);
1778 mtx_unlock(&glob->lru_lock);
1779
1780 ttm_bo_list_ref_sub(bo, put_count, true);
1781
1782 /**
1783 * Wait for GPU, then move to system cached.
1784 */
1785
1786 mtx_lock(&bo->bdev->fence_lock);
1787 ret = ttm_bo_wait(bo, false, false, false);
1788 mtx_unlock(&bo->bdev->fence_lock);
1789
1790 if (unlikely(ret != 0))
1791 goto out;
1792
1793 if ((bo->mem.placement & swap_placement) != swap_placement) {
1794 struct ttm_mem_reg evict_mem;
1795
1796 evict_mem = bo->mem;
1797 evict_mem.mm_node = NULL;
1798 evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1799 evict_mem.mem_type = TTM_PL_SYSTEM;
1800
1801 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
1802 false, false);
1803 if (unlikely(ret != 0))
1804 goto out;
1805 }
1806
1807 ttm_bo_unmap_virtual(bo);
1808
1809 /**
1810 * Swap out. Buffer will be swapped in again as soon as
1811 * anyone tries to access a ttm page.
1812 */
1813
1814 if (bo->bdev->driver->swap_notify)
1815 bo->bdev->driver->swap_notify(bo);
1816
1817 ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
1818out:
1819
1820 /**
1821 *
1822 * Unreserve without putting on LRU to avoid swapping out an
1823 * already swapped buffer.
1824 */
1825
1826 atomic_set(&bo->reserved, 0);
1827 wakeup(bo);
1828 if (refcount_release(&bo->list_kref))
1829 ttm_bo_release_list(bo);
1830 return ret;
1831}
1832
1833void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1834{
1835 while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
1836 ;
1837}
| 346void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo)
347{
348 ttm_bo_add_to_lru(bo);
349 atomic_set(&bo->reserved, 0);
350 wakeup(bo);
351}
352
353void ttm_bo_unreserve(struct ttm_buffer_object *bo)
354{
355 struct ttm_bo_global *glob = bo->glob;
356
357 mtx_lock(&glob->lru_lock);
358 ttm_bo_unreserve_locked(bo);
359 mtx_unlock(&glob->lru_lock);
360}
361
362/*
363 * Call bo->mutex locked.
364 */
365static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
366{
367 struct ttm_bo_device *bdev = bo->bdev;
368 struct ttm_bo_global *glob = bo->glob;
369 int ret = 0;
370 uint32_t page_flags = 0;
371
372 TTM_ASSERT_LOCKED(&bo->mutex);
373 bo->ttm = NULL;
374
375 if (bdev->need_dma32)
376 page_flags |= TTM_PAGE_FLAG_DMA32;
377
378 switch (bo->type) {
379 case ttm_bo_type_device:
380 if (zero_alloc)
381 page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
382 case ttm_bo_type_kernel:
383 bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
384 page_flags, glob->dummy_read_page);
385 if (unlikely(bo->ttm == NULL))
386 ret = -ENOMEM;
387 break;
388 case ttm_bo_type_sg:
389 bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
390 page_flags | TTM_PAGE_FLAG_SG,
391 glob->dummy_read_page);
392 if (unlikely(bo->ttm == NULL)) {
393 ret = -ENOMEM;
394 break;
395 }
396 bo->ttm->sg = bo->sg;
397 break;
398 default:
399 printf("[TTM] Illegal buffer object type\n");
400 ret = -EINVAL;
401 break;
402 }
403
404 return ret;
405}
406
407static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
408 struct ttm_mem_reg *mem,
409 bool evict, bool interruptible,
410 bool no_wait_gpu)
411{
412 struct ttm_bo_device *bdev = bo->bdev;
413 bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
414 bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
415 struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
416 struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
417 int ret = 0;
418
419 if (old_is_pci || new_is_pci ||
420 ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
421 ret = ttm_mem_io_lock(old_man, true);
422 if (unlikely(ret != 0))
423 goto out_err;
424 ttm_bo_unmap_virtual_locked(bo);
425 ttm_mem_io_unlock(old_man);
426 }
427
428 /*
429 * Create and bind a ttm if required.
430 */
431
432 if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
433 if (bo->ttm == NULL) {
434 bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
435 ret = ttm_bo_add_ttm(bo, zero);
436 if (ret)
437 goto out_err;
438 }
439
440 ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
441 if (ret)
442 goto out_err;
443
444 if (mem->mem_type != TTM_PL_SYSTEM) {
445 ret = ttm_tt_bind(bo->ttm, mem);
446 if (ret)
447 goto out_err;
448 }
449
450 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
451 if (bdev->driver->move_notify)
452 bdev->driver->move_notify(bo, mem);
453 bo->mem = *mem;
454 mem->mm_node = NULL;
455 goto moved;
456 }
457 }
458
459 if (bdev->driver->move_notify)
460 bdev->driver->move_notify(bo, mem);
461
462 if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
463 !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
464 ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem);
465 else if (bdev->driver->move)
466 ret = bdev->driver->move(bo, evict, interruptible,
467 no_wait_gpu, mem);
468 else
469 ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem);
470
471 if (ret) {
472 if (bdev->driver->move_notify) {
473 struct ttm_mem_reg tmp_mem = *mem;
474 *mem = bo->mem;
475 bo->mem = tmp_mem;
476 bdev->driver->move_notify(bo, mem);
477 bo->mem = *mem;
478 }
479
480 goto out_err;
481 }
482
483moved:
484 if (bo->evicted) {
485 ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
486 if (ret)
487 printf("[TTM] Can not flush read caches\n");
488 bo->evicted = false;
489 }
490
491 if (bo->mem.mm_node) {
492 bo->offset = (bo->mem.start << PAGE_SHIFT) +
493 bdev->man[bo->mem.mem_type].gpu_offset;
494 bo->cur_placement = bo->mem.placement;
495 } else
496 bo->offset = 0;
497
498 return 0;
499
500out_err:
501 new_man = &bdev->man[bo->mem.mem_type];
502 if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
503 ttm_tt_unbind(bo->ttm);
504 ttm_tt_destroy(bo->ttm);
505 bo->ttm = NULL;
506 }
507
508 return ret;
509}
510
511/**
512 * Call bo::reserved.
513 * Will release GPU memory type usage on destruction.
514 * This is the place to put in driver specific hooks to release
515 * driver private resources.
516 * Will release the bo::reserved lock.
517 */
518
519static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
520{
521 if (bo->bdev->driver->move_notify)
522 bo->bdev->driver->move_notify(bo, NULL);
523
524 if (bo->ttm) {
525 ttm_tt_unbind(bo->ttm);
526 ttm_tt_destroy(bo->ttm);
527 bo->ttm = NULL;
528 }
529 ttm_bo_mem_put(bo, &bo->mem);
530
531 atomic_set(&bo->reserved, 0);
532 wakeup(&bo);
533
534 /*
535 * Since the final reference to this bo may not be dropped by
536 * the current task we have to put a memory barrier here to make
537 * sure the changes done in this function are always visible.
538 *
539 * This function only needs protection against the final kref_put.
540 */
541 mb();
542}
543
544static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
545{
546 struct ttm_bo_device *bdev = bo->bdev;
547 struct ttm_bo_global *glob = bo->glob;
548 struct ttm_bo_driver *driver = bdev->driver;
549 void *sync_obj = NULL;
550 int put_count;
551 int ret;
552
553 mtx_lock(&glob->lru_lock);
554 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
555
556 mtx_lock(&bdev->fence_lock);
557 (void) ttm_bo_wait(bo, false, false, true);
558 if (!ret && !bo->sync_obj) {
559 mtx_unlock(&bdev->fence_lock);
560 put_count = ttm_bo_del_from_lru(bo);
561
562 mtx_unlock(&glob->lru_lock);
563 ttm_bo_cleanup_memtype_use(bo);
564
565 ttm_bo_list_ref_sub(bo, put_count, true);
566
567 return;
568 }
569 if (bo->sync_obj)
570 sync_obj = driver->sync_obj_ref(bo->sync_obj);
571 mtx_unlock(&bdev->fence_lock);
572
573 if (!ret) {
574 atomic_set(&bo->reserved, 0);
575 wakeup(bo);
576 }
577
578 refcount_acquire(&bo->list_kref);
579 list_add_tail(&bo->ddestroy, &bdev->ddestroy);
580 mtx_unlock(&glob->lru_lock);
581
582 if (sync_obj) {
583 driver->sync_obj_flush(sync_obj);
584 driver->sync_obj_unref(&sync_obj);
585 }
586 taskqueue_enqueue_timeout(taskqueue_thread, &bdev->wq,
587 ((hz / 100) < 1) ? 1 : hz / 100);
588}
589
590/**
591 * function ttm_bo_cleanup_refs_and_unlock
592 * If bo idle, remove from delayed- and lru lists, and unref.
593 * If not idle, do nothing.
594 *
595 * Must be called with lru_lock and reservation held, this function
596 * will drop both before returning.
597 *
598 * @interruptible Any sleeps should occur interruptibly.
599 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
600 */
601
602static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
603 bool interruptible,
604 bool no_wait_gpu)
605{
606 struct ttm_bo_device *bdev = bo->bdev;
607 struct ttm_bo_driver *driver = bdev->driver;
608 struct ttm_bo_global *glob = bo->glob;
609 int put_count;
610 int ret;
611
612 mtx_lock(&bdev->fence_lock);
613 ret = ttm_bo_wait(bo, false, false, true);
614
615 if (ret && !no_wait_gpu) {
616 void *sync_obj;
617
618 /*
619 * Take a reference to the fence and unreserve,
620 * at this point the buffer should be dead, so
621 * no new sync objects can be attached.
622 */
623 sync_obj = driver->sync_obj_ref(bo->sync_obj);
624 mtx_unlock(&bdev->fence_lock);
625
626 atomic_set(&bo->reserved, 0);
627 wakeup(bo);
628 mtx_unlock(&glob->lru_lock);
629
630 ret = driver->sync_obj_wait(sync_obj, false, interruptible);
631 driver->sync_obj_unref(&sync_obj);
632 if (ret)
633 return ret;
634
635 /*
636 * remove sync_obj with ttm_bo_wait, the wait should be
637 * finished, and no new wait object should have been added.
638 */
639 mtx_lock(&bdev->fence_lock);
640 ret = ttm_bo_wait(bo, false, false, true);
641 mtx_unlock(&bdev->fence_lock);
642 if (ret)
643 return ret;
644
645 mtx_lock(&glob->lru_lock);
646 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
647
648 /*
649 * We raced, and lost, someone else holds the reservation now,
650 * and is probably busy in ttm_bo_cleanup_memtype_use.
651 *
652 * Even if it's not the case, because we finished waiting any
653 * delayed destruction would succeed, so just return success
654 * here.
655 */
656 if (ret) {
657 mtx_unlock(&glob->lru_lock);
658 return 0;
659 }
660 } else
661 mtx_unlock(&bdev->fence_lock);
662
663 if (ret || unlikely(list_empty(&bo->ddestroy))) {
664 atomic_set(&bo->reserved, 0);
665 wakeup(bo);
666 mtx_unlock(&glob->lru_lock);
667 return ret;
668 }
669
670 put_count = ttm_bo_del_from_lru(bo);
671 list_del_init(&bo->ddestroy);
672 ++put_count;
673
674 mtx_unlock(&glob->lru_lock);
675 ttm_bo_cleanup_memtype_use(bo);
676
677 ttm_bo_list_ref_sub(bo, put_count, true);
678
679 return 0;
680}
681
682/**
683 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
684 * encountered buffers.
685 */
686
687static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
688{
689 struct ttm_bo_global *glob = bdev->glob;
690 struct ttm_buffer_object *entry = NULL;
691 int ret = 0;
692
693 mtx_lock(&glob->lru_lock);
694 if (list_empty(&bdev->ddestroy))
695 goto out_unlock;
696
697 entry = list_first_entry(&bdev->ddestroy,
698 struct ttm_buffer_object, ddestroy);
699 refcount_acquire(&entry->list_kref);
700
701 for (;;) {
702 struct ttm_buffer_object *nentry = NULL;
703
704 if (entry->ddestroy.next != &bdev->ddestroy) {
705 nentry = list_first_entry(&entry->ddestroy,
706 struct ttm_buffer_object, ddestroy);
707 refcount_acquire(&nentry->list_kref);
708 }
709
710 ret = ttm_bo_reserve_nolru(entry, false, true, false, 0);
711 if (remove_all && ret) {
712 ret = ttm_bo_reserve_nolru(entry, false, false,
713 false, 0);
714 }
715
716 if (!ret)
717 ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
718 !remove_all);
719 else
720 mtx_unlock(&glob->lru_lock);
721
722 if (refcount_release(&entry->list_kref))
723 ttm_bo_release_list(entry);
724 entry = nentry;
725
726 if (ret || !entry)
727 goto out;
728
729 mtx_lock(&glob->lru_lock);
730 if (list_empty(&entry->ddestroy))
731 break;
732 }
733
734out_unlock:
735 mtx_unlock(&glob->lru_lock);
736out:
737 if (entry && refcount_release(&entry->list_kref))
738 ttm_bo_release_list(entry);
739 return ret;
740}
741
742static void ttm_bo_delayed_workqueue(void *arg, int pending __unused)
743{
744 struct ttm_bo_device *bdev = arg;
745
746 if (ttm_bo_delayed_delete(bdev, false)) {
747 taskqueue_enqueue_timeout(taskqueue_thread, &bdev->wq,
748 ((hz / 100) < 1) ? 1 : hz / 100);
749 }
750}
751
752static void ttm_bo_release(struct ttm_buffer_object *bo)
753{
754 struct ttm_bo_device *bdev = bo->bdev;
755 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
756
757 rw_wlock(&bdev->vm_lock);
758 if (likely(bo->vm_node != NULL)) {
759 RB_REMOVE(ttm_bo_device_buffer_objects,
760 &bdev->addr_space_rb, bo);
761 drm_mm_put_block(bo->vm_node);
762 bo->vm_node = NULL;
763 }
764 rw_wunlock(&bdev->vm_lock);
765 ttm_mem_io_lock(man, false);
766 ttm_mem_io_free_vm(bo);
767 ttm_mem_io_unlock(man);
768 ttm_bo_cleanup_refs_or_queue(bo);
769 if (refcount_release(&bo->list_kref))
770 ttm_bo_release_list(bo);
771}
772
773void ttm_bo_unref(struct ttm_buffer_object **p_bo)
774{
775 struct ttm_buffer_object *bo = *p_bo;
776
777 *p_bo = NULL;
778 if (refcount_release(&bo->kref))
779 ttm_bo_release(bo);
780}
781
782int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
783{
784 int pending;
785
786 taskqueue_cancel_timeout(taskqueue_thread, &bdev->wq, &pending);
787 if (pending)
788 taskqueue_drain_timeout(taskqueue_thread, &bdev->wq);
789 return (pending);
790}
791
792void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
793{
794 if (resched) {
795 taskqueue_enqueue_timeout(taskqueue_thread, &bdev->wq,
796 ((hz / 100) < 1) ? 1 : hz / 100);
797 }
798}
799
800static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
801 bool no_wait_gpu)
802{
803 struct ttm_bo_device *bdev = bo->bdev;
804 struct ttm_mem_reg evict_mem;
805 struct ttm_placement placement;
806 int ret = 0;
807
808 mtx_lock(&bdev->fence_lock);
809 ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
810 mtx_unlock(&bdev->fence_lock);
811
812 if (unlikely(ret != 0)) {
813 if (ret != -ERESTART) {
814 printf("[TTM] Failed to expire sync object before buffer eviction\n");
815 }
816 goto out;
817 }
818
819 MPASS(ttm_bo_is_reserved(bo));
820
821 evict_mem = bo->mem;
822 evict_mem.mm_node = NULL;
823 evict_mem.bus.io_reserved_vm = false;
824 evict_mem.bus.io_reserved_count = 0;
825
826 placement.fpfn = 0;
827 placement.lpfn = 0;
828 placement.num_placement = 0;
829 placement.num_busy_placement = 0;
830 bdev->driver->evict_flags(bo, &placement);
831 ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
832 no_wait_gpu);
833 if (ret) {
834 if (ret != -ERESTART) {
835 printf("[TTM] Failed to find memory space for buffer 0x%p eviction\n",
836 bo);
837 ttm_bo_mem_space_debug(bo, &placement);
838 }
839 goto out;
840 }
841
842 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
843 no_wait_gpu);
844 if (ret) {
845 if (ret != -ERESTART)
846 printf("[TTM] Buffer eviction failed\n");
847 ttm_bo_mem_put(bo, &evict_mem);
848 goto out;
849 }
850 bo->evicted = true;
851out:
852 return ret;
853}
854
855static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
856 uint32_t mem_type,
857 bool interruptible,
858 bool no_wait_gpu)
859{
860 struct ttm_bo_global *glob = bdev->glob;
861 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
862 struct ttm_buffer_object *bo;
863 int ret = -EBUSY, put_count;
864
865 mtx_lock(&glob->lru_lock);
866 list_for_each_entry(bo, &man->lru, lru) {
867 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
868 if (!ret)
869 break;
870 }
871
872 if (ret) {
873 mtx_unlock(&glob->lru_lock);
874 return ret;
875 }
876
877 refcount_acquire(&bo->list_kref);
878
879 if (!list_empty(&bo->ddestroy)) {
880 ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible,
881 no_wait_gpu);
882 if (refcount_release(&bo->list_kref))
883 ttm_bo_release_list(bo);
884 return ret;
885 }
886
887 put_count = ttm_bo_del_from_lru(bo);
888 mtx_unlock(&glob->lru_lock);
889
890 MPASS(ret == 0);
891
892 ttm_bo_list_ref_sub(bo, put_count, true);
893
894 ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
895 ttm_bo_unreserve(bo);
896
897 if (refcount_release(&bo->list_kref))
898 ttm_bo_release_list(bo);
899 return ret;
900}
901
902void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
903{
904 struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
905
906 if (mem->mm_node)
907 (*man->func->put_node)(man, mem);
908}
909
910/**
911 * Repeatedly evict memory from the LRU for @mem_type until we create enough
912 * space, or we've evicted everything and there isn't enough space.
913 */
914static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
915 uint32_t mem_type,
916 struct ttm_placement *placement,
917 struct ttm_mem_reg *mem,
918 bool interruptible,
919 bool no_wait_gpu)
920{
921 struct ttm_bo_device *bdev = bo->bdev;
922 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
923 int ret;
924
925 do {
926 ret = (*man->func->get_node)(man, bo, placement, mem);
927 if (unlikely(ret != 0))
928 return ret;
929 if (mem->mm_node)
930 break;
931 ret = ttm_mem_evict_first(bdev, mem_type,
932 interruptible, no_wait_gpu);
933 if (unlikely(ret != 0))
934 return ret;
935 } while (1);
936 if (mem->mm_node == NULL)
937 return -ENOMEM;
938 mem->mem_type = mem_type;
939 return 0;
940}
941
942static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
943 uint32_t cur_placement,
944 uint32_t proposed_placement)
945{
946 uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
947 uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
948
949 /**
950 * Keep current caching if possible.
951 */
952
953 if ((cur_placement & caching) != 0)
954 result |= (cur_placement & caching);
955 else if ((man->default_caching & caching) != 0)
956 result |= man->default_caching;
957 else if ((TTM_PL_FLAG_CACHED & caching) != 0)
958 result |= TTM_PL_FLAG_CACHED;
959 else if ((TTM_PL_FLAG_WC & caching) != 0)
960 result |= TTM_PL_FLAG_WC;
961 else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
962 result |= TTM_PL_FLAG_UNCACHED;
963
964 return result;
965}
966
967static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
968 uint32_t mem_type,
969 uint32_t proposed_placement,
970 uint32_t *masked_placement)
971{
972 uint32_t cur_flags = ttm_bo_type_flags(mem_type);
973
974 if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0)
975 return false;
976
977 if ((proposed_placement & man->available_caching) == 0)
978 return false;
979
980 cur_flags |= (proposed_placement & man->available_caching);
981
982 *masked_placement = cur_flags;
983 return true;
984}
985
986/**
987 * Creates space for memory region @mem according to its type.
988 *
989 * This function first searches for free space in compatible memory types in
990 * the priority order defined by the driver. If free space isn't found, then
991 * ttm_bo_mem_force_space is attempted in priority order to evict and find
992 * space.
993 */
994int ttm_bo_mem_space(struct ttm_buffer_object *bo,
995 struct ttm_placement *placement,
996 struct ttm_mem_reg *mem,
997 bool interruptible,
998 bool no_wait_gpu)
999{
1000 struct ttm_bo_device *bdev = bo->bdev;
1001 struct ttm_mem_type_manager *man;
1002 uint32_t mem_type = TTM_PL_SYSTEM;
1003 uint32_t cur_flags = 0;
1004 bool type_found = false;
1005 bool type_ok = false;
1006 bool has_erestartsys = false;
1007 int i, ret;
1008
1009 mem->mm_node = NULL;
1010 for (i = 0; i < placement->num_placement; ++i) {
1011 ret = ttm_mem_type_from_flags(placement->placement[i],
1012 &mem_type);
1013 if (ret)
1014 return ret;
1015 man = &bdev->man[mem_type];
1016
1017 type_ok = ttm_bo_mt_compatible(man,
1018 mem_type,
1019 placement->placement[i],
1020 &cur_flags);
1021
1022 if (!type_ok)
1023 continue;
1024
1025 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
1026 cur_flags);
1027 /*
1028 * Use the access and other non-mapping-related flag bits from
1029 * the memory placement flags to the current flags
1030 */
1031 ttm_flag_masked(&cur_flags, placement->placement[i],
1032 ~TTM_PL_MASK_MEMTYPE);
1033
1034 if (mem_type == TTM_PL_SYSTEM)
1035 break;
1036
1037 if (man->has_type && man->use_type) {
1038 type_found = true;
1039 ret = (*man->func->get_node)(man, bo, placement, mem);
1040 if (unlikely(ret))
1041 return ret;
1042 }
1043 if (mem->mm_node)
1044 break;
1045 }
1046
1047 if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
1048 mem->mem_type = mem_type;
1049 mem->placement = cur_flags;
1050 return 0;
1051 }
1052
1053 if (!type_found)
1054 return -EINVAL;
1055
1056 for (i = 0; i < placement->num_busy_placement; ++i) {
1057 ret = ttm_mem_type_from_flags(placement->busy_placement[i],
1058 &mem_type);
1059 if (ret)
1060 return ret;
1061 man = &bdev->man[mem_type];
1062 if (!man->has_type)
1063 continue;
1064 if (!ttm_bo_mt_compatible(man,
1065 mem_type,
1066 placement->busy_placement[i],
1067 &cur_flags))
1068 continue;
1069
1070 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
1071 cur_flags);
1072 /*
1073 * Use the access and other non-mapping-related flag bits from
1074 * the memory placement flags to the current flags
1075 */
1076 ttm_flag_masked(&cur_flags, placement->busy_placement[i],
1077 ~TTM_PL_MASK_MEMTYPE);
1078
1079
1080 if (mem_type == TTM_PL_SYSTEM) {
1081 mem->mem_type = mem_type;
1082 mem->placement = cur_flags;
1083 mem->mm_node = NULL;
1084 return 0;
1085 }
1086
1087 ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,
1088 interruptible, no_wait_gpu);
1089 if (ret == 0 && mem->mm_node) {
1090 mem->placement = cur_flags;
1091 return 0;
1092 }
1093 if (ret == -ERESTART)
1094 has_erestartsys = true;
1095 }
1096 ret = (has_erestartsys) ? -ERESTART : -ENOMEM;
1097 return ret;
1098}
1099
1100static
1101int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
1102 struct ttm_placement *placement,
1103 bool interruptible,
1104 bool no_wait_gpu)
1105{
1106 int ret = 0;
1107 struct ttm_mem_reg mem;
1108 struct ttm_bo_device *bdev = bo->bdev;
1109
1110 MPASS(ttm_bo_is_reserved(bo));
1111
1112 /*
1113 * FIXME: It's possible to pipeline buffer moves.
1114 * Have the driver move function wait for idle when necessary,
1115 * instead of doing it here.
1116 */
1117 mtx_lock(&bdev->fence_lock);
1118 ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
1119 mtx_unlock(&bdev->fence_lock);
1120 if (ret)
1121 return ret;
1122 mem.num_pages = bo->num_pages;
1123 mem.size = mem.num_pages << PAGE_SHIFT;
1124 mem.page_alignment = bo->mem.page_alignment;
1125 mem.bus.io_reserved_vm = false;
1126 mem.bus.io_reserved_count = 0;
1127 /*
1128 * Determine where to move the buffer.
1129 */
1130 ret = ttm_bo_mem_space(bo, placement, &mem,
1131 interruptible, no_wait_gpu);
1132 if (ret)
1133 goto out_unlock;
1134 ret = ttm_bo_handle_move_mem(bo, &mem, false,
1135 interruptible, no_wait_gpu);
1136out_unlock:
1137 if (ret && mem.mm_node)
1138 ttm_bo_mem_put(bo, &mem);
1139 return ret;
1140}
1141
1142static int ttm_bo_mem_compat(struct ttm_placement *placement,
1143 struct ttm_mem_reg *mem)
1144{
1145 int i;
1146
1147 if (mem->mm_node && placement->lpfn != 0 &&
1148 (mem->start < placement->fpfn ||
1149 mem->start + mem->num_pages > placement->lpfn))
1150 return -1;
1151
1152 for (i = 0; i < placement->num_placement; i++) {
1153 if ((placement->placement[i] & mem->placement &
1154 TTM_PL_MASK_CACHING) &&
1155 (placement->placement[i] & mem->placement &
1156 TTM_PL_MASK_MEM))
1157 return i;
1158 }
1159 return -1;
1160}
1161
1162int ttm_bo_validate(struct ttm_buffer_object *bo,
1163 struct ttm_placement *placement,
1164 bool interruptible,
1165 bool no_wait_gpu)
1166{
1167 int ret;
1168
1169 MPASS(ttm_bo_is_reserved(bo));
1170 /* Check that range is valid */
1171 if (placement->lpfn || placement->fpfn)
1172 if (placement->fpfn > placement->lpfn ||
1173 (placement->lpfn - placement->fpfn) < bo->num_pages)
1174 return -EINVAL;
1175 /*
1176 * Check whether we need to move buffer.
1177 */
1178 ret = ttm_bo_mem_compat(placement, &bo->mem);
1179 if (ret < 0) {
1180 ret = ttm_bo_move_buffer(bo, placement, interruptible,
1181 no_wait_gpu);
1182 if (ret)
1183 return ret;
1184 } else {
1185 /*
1186 * Use the access and other non-mapping-related flag bits from
1187 * the compatible memory placement flags to the active flags
1188 */
1189 ttm_flag_masked(&bo->mem.placement, placement->placement[ret],
1190 ~TTM_PL_MASK_MEMTYPE);
1191 }
1192 /*
1193 * We might need to add a TTM.
1194 */
1195 if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1196 ret = ttm_bo_add_ttm(bo, true);
1197 if (ret)
1198 return ret;
1199 }
1200 return 0;
1201}
1202
1203int ttm_bo_check_placement(struct ttm_buffer_object *bo,
1204 struct ttm_placement *placement)
1205{
1206 MPASS(!((placement->fpfn || placement->lpfn) &&
1207 (bo->mem.num_pages > (placement->lpfn - placement->fpfn))));
1208
1209 return 0;
1210}
1211
1212int ttm_bo_init(struct ttm_bo_device *bdev,
1213 struct ttm_buffer_object *bo,
1214 unsigned long size,
1215 enum ttm_bo_type type,
1216 struct ttm_placement *placement,
1217 uint32_t page_alignment,
1218 bool interruptible,
1219 struct vm_object *persistent_swap_storage,
1220 size_t acc_size,
1221 struct sg_table *sg,
1222 void (*destroy) (struct ttm_buffer_object *))
1223{
1224 int ret = 0;
1225 unsigned long num_pages;
1226 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1227
1228 ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
1229 if (ret) {
1230 printf("[TTM] Out of kernel memory\n");
1231 if (destroy)
1232 (*destroy)(bo);
1233 else
1234 free(bo, M_TTM_BO);
1235 return -ENOMEM;
1236 }
1237
1238 num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1239 if (num_pages == 0) {
1240 printf("[TTM] Illegal buffer object size\n");
1241 if (destroy)
1242 (*destroy)(bo);
1243 else
1244 free(bo, M_TTM_BO);
1245 ttm_mem_global_free(mem_glob, acc_size);
1246 return -EINVAL;
1247 }
1248 bo->destroy = destroy;
1249
1250 refcount_init(&bo->kref, 1);
1251 refcount_init(&bo->list_kref, 1);
1252 atomic_set(&bo->cpu_writers, 0);
1253 atomic_set(&bo->reserved, 1);
1254 INIT_LIST_HEAD(&bo->lru);
1255 INIT_LIST_HEAD(&bo->ddestroy);
1256 INIT_LIST_HEAD(&bo->swap);
1257 INIT_LIST_HEAD(&bo->io_reserve_lru);
1258 bo->bdev = bdev;
1259 bo->glob = bdev->glob;
1260 bo->type = type;
1261 bo->num_pages = num_pages;
1262 bo->mem.size = num_pages << PAGE_SHIFT;
1263 bo->mem.mem_type = TTM_PL_SYSTEM;
1264 bo->mem.num_pages = bo->num_pages;
1265 bo->mem.mm_node = NULL;
1266 bo->mem.page_alignment = page_alignment;
1267 bo->mem.bus.io_reserved_vm = false;
1268 bo->mem.bus.io_reserved_count = 0;
1269 bo->priv_flags = 0;
1270 bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1271 bo->seq_valid = false;
1272 bo->persistent_swap_storage = persistent_swap_storage;
1273 bo->acc_size = acc_size;
1274 bo->sg = sg;
1275 atomic_inc(&bo->glob->bo_count);
1276
1277 ret = ttm_bo_check_placement(bo, placement);
1278 if (unlikely(ret != 0))
1279 goto out_err;
1280
1281 /*
1282 * For ttm_bo_type_device buffers, allocate
1283 * address space from the device.
1284 */
1285 if (bo->type == ttm_bo_type_device ||
1286 bo->type == ttm_bo_type_sg) {
1287 ret = ttm_bo_setup_vm(bo);
1288 if (ret)
1289 goto out_err;
1290 }
1291
1292 ret = ttm_bo_validate(bo, placement, interruptible, false);
1293 if (ret)
1294 goto out_err;
1295
1296 ttm_bo_unreserve(bo);
1297 return 0;
1298
1299out_err:
1300 ttm_bo_unreserve(bo);
1301 ttm_bo_unref(&bo);
1302
1303 return ret;
1304}
1305
1306size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
1307 unsigned long bo_size,
1308 unsigned struct_size)
1309{
1310 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1311 size_t size = 0;
1312
1313 size += ttm_round_pot(struct_size);
1314 size += PAGE_ALIGN(npages * sizeof(void *));
1315 size += ttm_round_pot(sizeof(struct ttm_tt));
1316 return size;
1317}
1318
1319size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
1320 unsigned long bo_size,
1321 unsigned struct_size)
1322{
1323 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1324 size_t size = 0;
1325
1326 size += ttm_round_pot(struct_size);
1327 size += PAGE_ALIGN(npages * sizeof(void *));
1328 size += PAGE_ALIGN(npages * sizeof(dma_addr_t));
1329 size += ttm_round_pot(sizeof(struct ttm_dma_tt));
1330 return size;
1331}
1332
1333int ttm_bo_create(struct ttm_bo_device *bdev,
1334 unsigned long size,
1335 enum ttm_bo_type type,
1336 struct ttm_placement *placement,
1337 uint32_t page_alignment,
1338 bool interruptible,
1339 struct vm_object *persistent_swap_storage,
1340 struct ttm_buffer_object **p_bo)
1341{
1342 struct ttm_buffer_object *bo;
1343 size_t acc_size;
1344 int ret;
1345
1346 bo = malloc(sizeof(*bo), M_TTM_BO, M_WAITOK | M_ZERO);
1347 acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
1348 ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1349 interruptible, persistent_swap_storage, acc_size,
1350 NULL, NULL);
1351 if (likely(ret == 0))
1352 *p_bo = bo;
1353
1354 return ret;
1355}
1356
1357static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1358 unsigned mem_type, bool allow_errors)
1359{
1360 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1361 struct ttm_bo_global *glob = bdev->glob;
1362 int ret;
1363
1364 /*
1365 * Can't use standard list traversal since we're unlocking.
1366 */
1367
1368 mtx_lock(&glob->lru_lock);
1369 while (!list_empty(&man->lru)) {
1370 mtx_unlock(&glob->lru_lock);
1371 ret = ttm_mem_evict_first(bdev, mem_type, false, false);
1372 if (ret) {
1373 if (allow_errors) {
1374 return ret;
1375 } else {
1376 printf("[TTM] Cleanup eviction failed\n");
1377 }
1378 }
1379 mtx_lock(&glob->lru_lock);
1380 }
1381 mtx_unlock(&glob->lru_lock);
1382 return 0;
1383}
1384
1385int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1386{
1387 struct ttm_mem_type_manager *man;
1388 int ret = -EINVAL;
1389
1390 if (mem_type >= TTM_NUM_MEM_TYPES) {
1391 printf("[TTM] Illegal memory type %d\n", mem_type);
1392 return ret;
1393 }
1394 man = &bdev->man[mem_type];
1395
1396 if (!man->has_type) {
1397 printf("[TTM] Trying to take down uninitialized memory manager type %u\n",
1398 mem_type);
1399 return ret;
1400 }
1401
1402 man->use_type = false;
1403 man->has_type = false;
1404
1405 ret = 0;
1406 if (mem_type > 0) {
1407 ttm_bo_force_list_clean(bdev, mem_type, false);
1408
1409 ret = (*man->func->takedown)(man);
1410 }
1411
1412 return ret;
1413}
1414
1415int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1416{
1417 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1418
1419 if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1420 printf("[TTM] Illegal memory manager memory type %u\n", mem_type);
1421 return -EINVAL;
1422 }
1423
1424 if (!man->has_type) {
1425 printf("[TTM] Memory type %u has not been initialized\n", mem_type);
1426 return 0;
1427 }
1428
1429 return ttm_bo_force_list_clean(bdev, mem_type, true);
1430}
1431
1432int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1433 unsigned long p_size)
1434{
1435 int ret = -EINVAL;
1436 struct ttm_mem_type_manager *man;
1437
1438 MPASS(type < TTM_NUM_MEM_TYPES);
1439 man = &bdev->man[type];
1440 MPASS(!man->has_type);
1441 man->io_reserve_fastpath = true;
1442 man->use_io_reserve_lru = false;
1443 sx_init(&man->io_reserve_mutex, "ttmman");
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 ret = 0;
1452 if (type != TTM_PL_SYSTEM) {
1453 ret = (*man->func->init)(man, p_size);
1454 if (ret)
1455 return ret;
1456 }
1457 man->has_type = true;
1458 man->use_type = true;
1459 man->size = p_size;
1460
1461 INIT_LIST_HEAD(&man->lru);
1462
1463 return 0;
1464}
1465
1466static void ttm_bo_global_kobj_release(struct ttm_bo_global *glob)
1467{
1468
1469 ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
1470 vm_page_free(glob->dummy_read_page);
1471}
1472
1473void ttm_bo_global_release(struct drm_global_reference *ref)
1474{
1475 struct ttm_bo_global *glob = ref->object;
1476
1477 if (refcount_release(&glob->kobj_ref))
1478 ttm_bo_global_kobj_release(glob);
1479}
1480
1481int ttm_bo_global_init(struct drm_global_reference *ref)
1482{
1483 struct ttm_bo_global_ref *bo_ref =
1484 container_of(ref, struct ttm_bo_global_ref, ref);
1485 struct ttm_bo_global *glob = ref->object;
1486 int ret;
1487
1488 sx_init(&glob->device_list_mutex, "ttmdlm");
1489 mtx_init(&glob->lru_lock, "ttmlru", NULL, MTX_DEF);
1490 glob->mem_glob = bo_ref->mem_glob;
1491 glob->dummy_read_page = vm_page_alloc_contig(NULL, 0,
1492 VM_ALLOC_NORMAL | VM_ALLOC_NOOBJ,
1493 1, 0, VM_MAX_ADDRESS, PAGE_SIZE, 0, VM_MEMATTR_UNCACHEABLE);
1494
1495 if (unlikely(glob->dummy_read_page == NULL)) {
1496 ret = -ENOMEM;
1497 goto out_no_drp;
1498 }
1499
1500 INIT_LIST_HEAD(&glob->swap_lru);
1501 INIT_LIST_HEAD(&glob->device_list);
1502
1503 ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
1504 ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
1505 if (unlikely(ret != 0)) {
1506 printf("[TTM] Could not register buffer object swapout\n");
1507 goto out_no_shrink;
1508 }
1509
1510 atomic_set(&glob->bo_count, 0);
1511
1512 refcount_init(&glob->kobj_ref, 1);
1513 return (0);
1514
1515out_no_shrink:
1516 vm_page_free(glob->dummy_read_page);
1517out_no_drp:
1518 free(glob, M_DRM_GLOBAL);
1519 return ret;
1520}
1521
1522int ttm_bo_device_release(struct ttm_bo_device *bdev)
1523{
1524 int ret = 0;
1525 unsigned i = TTM_NUM_MEM_TYPES;
1526 struct ttm_mem_type_manager *man;
1527 struct ttm_bo_global *glob = bdev->glob;
1528
1529 while (i--) {
1530 man = &bdev->man[i];
1531 if (man->has_type) {
1532 man->use_type = false;
1533 if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1534 ret = -EBUSY;
1535 printf("[TTM] DRM memory manager type %d is not clean\n",
1536 i);
1537 }
1538 man->has_type = false;
1539 }
1540 }
1541
1542 sx_xlock(&glob->device_list_mutex);
1543 list_del(&bdev->device_list);
1544 sx_xunlock(&glob->device_list_mutex);
1545
1546 if (taskqueue_cancel_timeout(taskqueue_thread, &bdev->wq, NULL))
1547 taskqueue_drain_timeout(taskqueue_thread, &bdev->wq);
1548
1549 while (ttm_bo_delayed_delete(bdev, true))
1550 ;
1551
1552 mtx_lock(&glob->lru_lock);
1553 if (list_empty(&bdev->ddestroy))
1554 TTM_DEBUG("Delayed destroy list was clean\n");
1555
1556 if (list_empty(&bdev->man[0].lru))
1557 TTM_DEBUG("Swap list was clean\n");
1558 mtx_unlock(&glob->lru_lock);
1559
1560 MPASS(drm_mm_clean(&bdev->addr_space_mm));
1561 rw_wlock(&bdev->vm_lock);
1562 drm_mm_takedown(&bdev->addr_space_mm);
1563 rw_wunlock(&bdev->vm_lock);
1564
1565 return ret;
1566}
1567
1568int ttm_bo_device_init(struct ttm_bo_device *bdev,
1569 struct ttm_bo_global *glob,
1570 struct ttm_bo_driver *driver,
1571 uint64_t file_page_offset,
1572 bool need_dma32)
1573{
1574 int ret = -EINVAL;
1575
1576 rw_init(&bdev->vm_lock, "ttmvml");
1577 bdev->driver = driver;
1578
1579 memset(bdev->man, 0, sizeof(bdev->man));
1580
1581 /*
1582 * Initialize the system memory buffer type.
1583 * Other types need to be driver / IOCTL initialized.
1584 */
1585 ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1586 if (unlikely(ret != 0))
1587 goto out_no_sys;
1588
1589 RB_INIT(&bdev->addr_space_rb);
1590 ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
1591 if (unlikely(ret != 0))
1592 goto out_no_addr_mm;
1593
1594 TIMEOUT_TASK_INIT(taskqueue_thread, &bdev->wq, 0,
1595 ttm_bo_delayed_workqueue, bdev);
1596 INIT_LIST_HEAD(&bdev->ddestroy);
1597 bdev->dev_mapping = NULL;
1598 bdev->glob = glob;
1599 bdev->need_dma32 = need_dma32;
1600 bdev->val_seq = 0;
1601 mtx_init(&bdev->fence_lock, "ttmfence", NULL, MTX_DEF);
1602 sx_xlock(&glob->device_list_mutex);
1603 list_add_tail(&bdev->device_list, &glob->device_list);
1604 sx_xunlock(&glob->device_list_mutex);
1605
1606 return 0;
1607out_no_addr_mm:
1608 ttm_bo_clean_mm(bdev, 0);
1609out_no_sys:
1610 return ret;
1611}
1612
1613/*
1614 * buffer object vm functions.
1615 */
1616
1617bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1618{
1619 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1620
1621 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1622 if (mem->mem_type == TTM_PL_SYSTEM)
1623 return false;
1624
1625 if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1626 return false;
1627
1628 if (mem->placement & TTM_PL_FLAG_CACHED)
1629 return false;
1630 }
1631 return true;
1632}
1633
1634void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1635{
1636 struct ttm_bo_device *bdev = bo->bdev;
1637 /* off_t offset = (off_t)bo->addr_space_offset;XXXKIB */
1638 /* off_t holelen = ((off_t)bo->mem.num_pages) << PAGE_SHIFT;XXXKIB */
1639
1640 if (!bdev->dev_mapping)
1641 return;
1642 /* unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); XXXKIB */
1643 ttm_mem_io_free_vm(bo);
1644}
1645
1646void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1647{
1648 struct ttm_bo_device *bdev = bo->bdev;
1649 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
1650
1651 ttm_mem_io_lock(man, false);
1652 ttm_bo_unmap_virtual_locked(bo);
1653 ttm_mem_io_unlock(man);
1654}
1655
1656static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
1657{
1658 struct ttm_bo_device *bdev = bo->bdev;
1659
1660 /* The caller acquired bdev->vm_lock. */
1661 RB_INSERT(ttm_bo_device_buffer_objects, &bdev->addr_space_rb, bo);
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
1675static int ttm_bo_setup_vm(struct ttm_buffer_object *bo)
1676{
1677 struct ttm_bo_device *bdev = bo->bdev;
1678 int ret;
1679
1680retry_pre_get:
1681 ret = drm_mm_pre_get(&bdev->addr_space_mm);
1682 if (unlikely(ret != 0))
1683 return ret;
1684
1685 rw_wlock(&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 rw_wunlock(&bdev->vm_lock);
1699 goto retry_pre_get;
1700 }
1701
1702 ttm_bo_vm_insert_rb(bo);
1703 rw_wunlock(&bdev->vm_lock);
1704 bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT;
1705
1706 return 0;
1707out_unlock:
1708 rw_wunlock(&bdev->vm_lock);
1709 return ret;
1710}
1711
1712int 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 struct ttm_bo_device *bdev = bo->bdev;
1717 void *sync_obj;
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)) {
1726 void *tmp_obj = bo->sync_obj;
1727 bo->sync_obj = NULL;
1728 clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
1729 mtx_unlock(&bdev->fence_lock);
1730 driver->sync_obj_unref(&tmp_obj);
1731 mtx_lock(&bdev->fence_lock);
1732 continue;
1733 }
1734
1735 if (no_wait)
1736 return -EBUSY;
1737
1738 sync_obj = driver->sync_obj_ref(bo->sync_obj);
1739 mtx_unlock(&bdev->fence_lock);
1740 ret = driver->sync_obj_wait(sync_obj,
1741 lazy, interruptible);
1742 if (unlikely(ret != 0)) {
1743 driver->sync_obj_unref(&sync_obj);
1744 mtx_lock(&bdev->fence_lock);
1745 return ret;
1746 }
1747 mtx_lock(&bdev->fence_lock);
1748 if (likely(bo->sync_obj == sync_obj)) {
1749 void *tmp_obj = bo->sync_obj;
1750 bo->sync_obj = NULL;
1751 clear_bit(TTM_BO_PRIV_FLAG_MOVING,
1752 &bo->priv_flags);
1753 mtx_unlock(&bdev->fence_lock);
1754 driver->sync_obj_unref(&sync_obj);
1755 driver->sync_obj_unref(&tmp_obj);
1756 mtx_lock(&bdev->fence_lock);
1757 } else {
1758 mtx_unlock(&bdev->fence_lock);
1759 driver->sync_obj_unref(&sync_obj);
1760 mtx_lock(&bdev->fence_lock);
1761 }
1762 }
1763 return 0;
1764}
1765
1766int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1767{
1768 struct ttm_bo_device *bdev = bo->bdev;
1769 int ret = 0;
1770
1771 /*
1772 * Using ttm_bo_reserve makes sure the lru lists are updated.
1773 */
1774
1775 ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
1776 if (unlikely(ret != 0))
1777 return ret;
1778 mtx_lock(&bdev->fence_lock);
1779 ret = ttm_bo_wait(bo, false, true, no_wait);
1780 mtx_unlock(&bdev->fence_lock);
1781 if (likely(ret == 0))
1782 atomic_inc(&bo->cpu_writers);
1783 ttm_bo_unreserve(bo);
1784 return ret;
1785}
1786
1787void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1788{
1789 atomic_dec(&bo->cpu_writers);
1790}
1791
1792/**
1793 * A buffer object shrink method that tries to swap out the first
1794 * buffer object on the bo_global::swap_lru list.
1795 */
1796
1797static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
1798{
1799 struct ttm_bo_global *glob =
1800 container_of(shrink, struct ttm_bo_global, shrink);
1801 struct ttm_buffer_object *bo;
1802 int ret = -EBUSY;
1803 int put_count;
1804 uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
1805
1806 mtx_lock(&glob->lru_lock);
1807 list_for_each_entry(bo, &glob->swap_lru, swap) {
1808 ret = ttm_bo_reserve_nolru(bo, false, true, false, 0);
1809 if (!ret)
1810 break;
1811 }
1812
1813 if (ret) {
1814 mtx_unlock(&glob->lru_lock);
1815 return ret;
1816 }
1817
1818 refcount_acquire(&bo->list_kref);
1819
1820 if (!list_empty(&bo->ddestroy)) {
1821 ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false);
1822 if (refcount_release(&bo->list_kref))
1823 ttm_bo_release_list(bo);
1824 return ret;
1825 }
1826
1827 put_count = ttm_bo_del_from_lru(bo);
1828 mtx_unlock(&glob->lru_lock);
1829
1830 ttm_bo_list_ref_sub(bo, put_count, true);
1831
1832 /**
1833 * Wait for GPU, then move to system cached.
1834 */
1835
1836 mtx_lock(&bo->bdev->fence_lock);
1837 ret = ttm_bo_wait(bo, false, false, false);
1838 mtx_unlock(&bo->bdev->fence_lock);
1839
1840 if (unlikely(ret != 0))
1841 goto out;
1842
1843 if ((bo->mem.placement & swap_placement) != swap_placement) {
1844 struct ttm_mem_reg evict_mem;
1845
1846 evict_mem = bo->mem;
1847 evict_mem.mm_node = NULL;
1848 evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1849 evict_mem.mem_type = TTM_PL_SYSTEM;
1850
1851 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
1852 false, false);
1853 if (unlikely(ret != 0))
1854 goto out;
1855 }
1856
1857 ttm_bo_unmap_virtual(bo);
1858
1859 /**
1860 * Swap out. Buffer will be swapped in again as soon as
1861 * anyone tries to access a ttm page.
1862 */
1863
1864 if (bo->bdev->driver->swap_notify)
1865 bo->bdev->driver->swap_notify(bo);
1866
1867 ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
1868out:
1869
1870 /**
1871 *
1872 * Unreserve without putting on LRU to avoid swapping out an
1873 * already swapped buffer.
1874 */
1875
1876 atomic_set(&bo->reserved, 0);
1877 wakeup(bo);
1878 if (refcount_release(&bo->list_kref))
1879 ttm_bo_release_list(bo);
1880 return ret;
1881}
1882
1883void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1884{
1885 while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
1886 ;
1887}
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