1 /**************************************************************************
3 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
31 #define pr_fmt(fmt) "[TTM] " fmt
33 #include <drm/ttm/ttm_module.h>
34 #include <drm/ttm/ttm_bo_driver.h>
35 #include <drm/ttm/ttm_placement.h>
36 #include <linux/jiffies.h>
37 #include <linux/slab.h>
38 #include <linux/sched.h>
40 #include <linux/file.h>
41 #include <linux/module.h>
42 #include <linux/atomic.h>
44 #define TTM_ASSERT_LOCKED(param)
45 #define TTM_DEBUG(fmt, arg...)
46 #define TTM_BO_HASH_ORDER 13
48 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
);
49 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
);
50 static void ttm_bo_global_kobj_release(struct kobject
*kobj
);
52 static struct attribute ttm_bo_count
= {
57 static inline int ttm_mem_type_from_flags(uint32_t flags
, uint32_t *mem_type
)
61 for (i
= 0; i
<= TTM_PL_PRIV5
; i
++)
62 if (flags
& (1 << i
)) {
69 static void ttm_mem_type_debug(struct ttm_bo_device
*bdev
, int mem_type
)
71 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
73 pr_err(" has_type: %d\n", man
->has_type
);
74 pr_err(" use_type: %d\n", man
->use_type
);
75 pr_err(" flags: 0x%08X\n", man
->flags
);
76 pr_err(" gpu_offset: 0x%08lX\n", man
->gpu_offset
);
77 pr_err(" size: %llu\n", man
->size
);
78 pr_err(" available_caching: 0x%08X\n", man
->available_caching
);
79 pr_err(" default_caching: 0x%08X\n", man
->default_caching
);
80 if (mem_type
!= TTM_PL_SYSTEM
)
81 (*man
->func
->debug
)(man
, TTM_PFX
);
84 static void ttm_bo_mem_space_debug(struct ttm_buffer_object
*bo
,
85 struct ttm_placement
*placement
)
89 pr_err("No space for %p (%lu pages, %luK, %luM)\n",
90 bo
, bo
->mem
.num_pages
, bo
->mem
.size
>> 10,
92 for (i
= 0; i
< placement
->num_placement
; i
++) {
93 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
97 pr_err(" placement[%d]=0x%08X (%d)\n",
98 i
, placement
->placement
[i
], mem_type
);
99 ttm_mem_type_debug(bo
->bdev
, mem_type
);
103 static ssize_t
ttm_bo_global_show(struct kobject
*kobj
,
104 struct attribute
*attr
,
107 struct ttm_bo_global
*glob
=
108 container_of(kobj
, struct ttm_bo_global
, kobj
);
110 return snprintf(buffer
, PAGE_SIZE
, "%lu\n",
111 (unsigned long) atomic_read(&glob
->bo_count
));
114 static struct attribute
*ttm_bo_global_attrs
[] = {
119 static const struct sysfs_ops ttm_bo_global_ops
= {
120 .show
= &ttm_bo_global_show
123 static struct kobj_type ttm_bo_glob_kobj_type
= {
124 .release
= &ttm_bo_global_kobj_release
,
125 .sysfs_ops
= &ttm_bo_global_ops
,
126 .default_attrs
= ttm_bo_global_attrs
130 static inline uint32_t ttm_bo_type_flags(unsigned type
)
135 static void ttm_bo_release_list(struct kref
*list_kref
)
137 struct ttm_buffer_object
*bo
=
138 container_of(list_kref
, struct ttm_buffer_object
, list_kref
);
139 struct ttm_bo_device
*bdev
= bo
->bdev
;
140 size_t acc_size
= bo
->acc_size
;
142 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
143 BUG_ON(atomic_read(&bo
->kref
.refcount
));
144 BUG_ON(atomic_read(&bo
->cpu_writers
));
145 BUG_ON(bo
->sync_obj
!= NULL
);
146 BUG_ON(bo
->mem
.mm_node
!= NULL
);
147 BUG_ON(!list_empty(&bo
->lru
));
148 BUG_ON(!list_empty(&bo
->ddestroy
));
151 ttm_tt_destroy(bo
->ttm
);
152 atomic_dec(&bo
->glob
->bo_count
);
153 if (bo
->resv
== &bo
->ttm_resv
)
154 reservation_object_fini(&bo
->ttm_resv
);
161 ttm_mem_global_free(bdev
->glob
->mem_glob
, acc_size
);
164 void ttm_bo_add_to_lru(struct ttm_buffer_object
*bo
)
166 struct ttm_bo_device
*bdev
= bo
->bdev
;
167 struct ttm_mem_type_manager
*man
;
169 lockdep_assert_held(&bo
->resv
->lock
.base
);
171 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
173 BUG_ON(!list_empty(&bo
->lru
));
175 man
= &bdev
->man
[bo
->mem
.mem_type
];
176 list_add_tail(&bo
->lru
, &man
->lru
);
177 kref_get(&bo
->list_kref
);
179 if (bo
->ttm
!= NULL
) {
180 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
181 kref_get(&bo
->list_kref
);
185 EXPORT_SYMBOL(ttm_bo_add_to_lru
);
187 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
191 if (!list_empty(&bo
->swap
)) {
192 list_del_init(&bo
->swap
);
195 if (!list_empty(&bo
->lru
)) {
196 list_del_init(&bo
->lru
);
201 * TODO: Add a driver hook to delete from
202 * driver-specific LRU's here.
208 static void ttm_bo_ref_bug(struct kref
*list_kref
)
213 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
216 kref_sub(&bo
->list_kref
, count
,
217 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
220 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object
*bo
)
224 spin_lock(&bo
->glob
->lru_lock
);
225 put_count
= ttm_bo_del_from_lru(bo
);
226 spin_unlock(&bo
->glob
->lru_lock
);
227 ttm_bo_list_ref_sub(bo
, put_count
, true);
229 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru
);
232 * Call bo->mutex locked.
234 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
236 struct ttm_bo_device
*bdev
= bo
->bdev
;
237 struct ttm_bo_global
*glob
= bo
->glob
;
239 uint32_t page_flags
= 0;
241 TTM_ASSERT_LOCKED(&bo
->mutex
);
244 if (bdev
->need_dma32
)
245 page_flags
|= TTM_PAGE_FLAG_DMA32
;
248 case ttm_bo_type_device
:
250 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
251 case ttm_bo_type_kernel
:
252 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
253 page_flags
, glob
->dummy_read_page
);
254 if (unlikely(bo
->ttm
== NULL
))
258 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
259 page_flags
| TTM_PAGE_FLAG_SG
,
260 glob
->dummy_read_page
);
261 if (unlikely(bo
->ttm
== NULL
)) {
265 bo
->ttm
->sg
= bo
->sg
;
268 pr_err("Illegal buffer object type\n");
276 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
277 struct ttm_mem_reg
*mem
,
278 bool evict
, bool interruptible
,
281 struct ttm_bo_device
*bdev
= bo
->bdev
;
282 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
283 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
284 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
285 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
288 if (old_is_pci
|| new_is_pci
||
289 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
290 ret
= ttm_mem_io_lock(old_man
, true);
291 if (unlikely(ret
!= 0))
293 ttm_bo_unmap_virtual_locked(bo
);
294 ttm_mem_io_unlock(old_man
);
298 * Create and bind a ttm if required.
301 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
302 if (bo
->ttm
== NULL
) {
303 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
304 ret
= ttm_bo_add_ttm(bo
, zero
);
309 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
313 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
314 ret
= ttm_tt_bind(bo
->ttm
, mem
);
319 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
320 if (bdev
->driver
->move_notify
)
321 bdev
->driver
->move_notify(bo
, mem
);
328 if (bdev
->driver
->move_notify
)
329 bdev
->driver
->move_notify(bo
, mem
);
331 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
332 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
333 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_gpu
, mem
);
334 else if (bdev
->driver
->move
)
335 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
338 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_gpu
, mem
);
341 if (bdev
->driver
->move_notify
) {
342 struct ttm_mem_reg tmp_mem
= *mem
;
345 bdev
->driver
->move_notify(bo
, mem
);
355 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
357 pr_err("Can not flush read caches\n");
361 if (bo
->mem
.mm_node
) {
362 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
363 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
364 bo
->cur_placement
= bo
->mem
.placement
;
371 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
372 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
373 ttm_tt_unbind(bo
->ttm
);
374 ttm_tt_destroy(bo
->ttm
);
383 * Will release GPU memory type usage on destruction.
384 * This is the place to put in driver specific hooks to release
385 * driver private resources.
386 * Will release the bo::reserved lock.
389 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
391 if (bo
->bdev
->driver
->move_notify
)
392 bo
->bdev
->driver
->move_notify(bo
, NULL
);
395 ttm_tt_unbind(bo
->ttm
);
396 ttm_tt_destroy(bo
->ttm
);
399 ttm_bo_mem_put(bo
, &bo
->mem
);
401 ww_mutex_unlock (&bo
->resv
->lock
);
404 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
406 struct ttm_bo_device
*bdev
= bo
->bdev
;
407 struct ttm_bo_global
*glob
= bo
->glob
;
408 struct ttm_bo_driver
*driver
= bdev
->driver
;
409 void *sync_obj
= NULL
;
413 spin_lock(&glob
->lru_lock
);
414 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
416 spin_lock(&bdev
->fence_lock
);
417 (void) ttm_bo_wait(bo
, false, false, true);
418 if (!ret
&& !bo
->sync_obj
) {
419 spin_unlock(&bdev
->fence_lock
);
420 put_count
= ttm_bo_del_from_lru(bo
);
422 spin_unlock(&glob
->lru_lock
);
423 ttm_bo_cleanup_memtype_use(bo
);
425 ttm_bo_list_ref_sub(bo
, put_count
, true);
430 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
431 spin_unlock(&bdev
->fence_lock
);
434 ww_mutex_unlock(&bo
->resv
->lock
);
436 kref_get(&bo
->list_kref
);
437 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
438 spin_unlock(&glob
->lru_lock
);
441 driver
->sync_obj_flush(sync_obj
);
442 driver
->sync_obj_unref(&sync_obj
);
444 schedule_delayed_work(&bdev
->wq
,
445 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
449 * function ttm_bo_cleanup_refs_and_unlock
450 * If bo idle, remove from delayed- and lru lists, and unref.
451 * If not idle, do nothing.
453 * Must be called with lru_lock and reservation held, this function
454 * will drop both before returning.
456 * @interruptible Any sleeps should occur interruptibly.
457 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
460 static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object
*bo
,
464 struct ttm_bo_device
*bdev
= bo
->bdev
;
465 struct ttm_bo_driver
*driver
= bdev
->driver
;
466 struct ttm_bo_global
*glob
= bo
->glob
;
470 spin_lock(&bdev
->fence_lock
);
471 ret
= ttm_bo_wait(bo
, false, false, true);
473 if (ret
&& !no_wait_gpu
) {
477 * Take a reference to the fence and unreserve,
478 * at this point the buffer should be dead, so
479 * no new sync objects can be attached.
481 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
482 spin_unlock(&bdev
->fence_lock
);
484 ww_mutex_unlock(&bo
->resv
->lock
);
485 spin_unlock(&glob
->lru_lock
);
487 ret
= driver
->sync_obj_wait(sync_obj
, false, interruptible
);
488 driver
->sync_obj_unref(&sync_obj
);
493 * remove sync_obj with ttm_bo_wait, the wait should be
494 * finished, and no new wait object should have been added.
496 spin_lock(&bdev
->fence_lock
);
497 ret
= ttm_bo_wait(bo
, false, false, true);
499 spin_unlock(&bdev
->fence_lock
);
503 spin_lock(&glob
->lru_lock
);
504 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
507 * We raced, and lost, someone else holds the reservation now,
508 * and is probably busy in ttm_bo_cleanup_memtype_use.
510 * Even if it's not the case, because we finished waiting any
511 * delayed destruction would succeed, so just return success
515 spin_unlock(&glob
->lru_lock
);
519 spin_unlock(&bdev
->fence_lock
);
521 if (ret
|| unlikely(list_empty(&bo
->ddestroy
))) {
522 ww_mutex_unlock(&bo
->resv
->lock
);
523 spin_unlock(&glob
->lru_lock
);
527 put_count
= ttm_bo_del_from_lru(bo
);
528 list_del_init(&bo
->ddestroy
);
531 spin_unlock(&glob
->lru_lock
);
532 ttm_bo_cleanup_memtype_use(bo
);
534 ttm_bo_list_ref_sub(bo
, put_count
, true);
540 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
541 * encountered buffers.
544 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
546 struct ttm_bo_global
*glob
= bdev
->glob
;
547 struct ttm_buffer_object
*entry
= NULL
;
550 spin_lock(&glob
->lru_lock
);
551 if (list_empty(&bdev
->ddestroy
))
554 entry
= list_first_entry(&bdev
->ddestroy
,
555 struct ttm_buffer_object
, ddestroy
);
556 kref_get(&entry
->list_kref
);
559 struct ttm_buffer_object
*nentry
= NULL
;
561 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
562 nentry
= list_first_entry(&entry
->ddestroy
,
563 struct ttm_buffer_object
, ddestroy
);
564 kref_get(&nentry
->list_kref
);
567 ret
= ttm_bo_reserve_nolru(entry
, false, true, false, 0);
568 if (remove_all
&& ret
) {
569 spin_unlock(&glob
->lru_lock
);
570 ret
= ttm_bo_reserve_nolru(entry
, false, false,
572 spin_lock(&glob
->lru_lock
);
576 ret
= ttm_bo_cleanup_refs_and_unlock(entry
, false,
579 spin_unlock(&glob
->lru_lock
);
581 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
587 spin_lock(&glob
->lru_lock
);
588 if (list_empty(&entry
->ddestroy
))
593 spin_unlock(&glob
->lru_lock
);
596 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
600 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
602 struct ttm_bo_device
*bdev
=
603 container_of(work
, struct ttm_bo_device
, wq
.work
);
605 if (ttm_bo_delayed_delete(bdev
, false)) {
606 schedule_delayed_work(&bdev
->wq
,
607 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
611 static void ttm_bo_release(struct kref
*kref
)
613 struct ttm_buffer_object
*bo
=
614 container_of(kref
, struct ttm_buffer_object
, kref
);
615 struct ttm_bo_device
*bdev
= bo
->bdev
;
616 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
618 drm_vma_offset_remove(&bdev
->vma_manager
, &bo
->vma_node
);
619 ttm_mem_io_lock(man
, false);
620 ttm_mem_io_free_vm(bo
);
621 ttm_mem_io_unlock(man
);
622 ttm_bo_cleanup_refs_or_queue(bo
);
623 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
626 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
628 struct ttm_buffer_object
*bo
= *p_bo
;
631 kref_put(&bo
->kref
, ttm_bo_release
);
633 EXPORT_SYMBOL(ttm_bo_unref
);
635 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
637 return cancel_delayed_work_sync(&bdev
->wq
);
639 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
641 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
644 schedule_delayed_work(&bdev
->wq
,
645 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
647 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
649 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
652 struct ttm_bo_device
*bdev
= bo
->bdev
;
653 struct ttm_mem_reg evict_mem
;
654 struct ttm_placement placement
;
657 spin_lock(&bdev
->fence_lock
);
658 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
659 spin_unlock(&bdev
->fence_lock
);
661 if (unlikely(ret
!= 0)) {
662 if (ret
!= -ERESTARTSYS
) {
663 pr_err("Failed to expire sync object before buffer eviction\n");
668 lockdep_assert_held(&bo
->resv
->lock
.base
);
671 evict_mem
.mm_node
= NULL
;
672 evict_mem
.bus
.io_reserved_vm
= false;
673 evict_mem
.bus
.io_reserved_count
= 0;
677 placement
.num_placement
= 0;
678 placement
.num_busy_placement
= 0;
679 bdev
->driver
->evict_flags(bo
, &placement
);
680 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
683 if (ret
!= -ERESTARTSYS
) {
684 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
686 ttm_bo_mem_space_debug(bo
, &placement
);
691 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
694 if (ret
!= -ERESTARTSYS
)
695 pr_err("Buffer eviction failed\n");
696 ttm_bo_mem_put(bo
, &evict_mem
);
704 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
709 struct ttm_bo_global
*glob
= bdev
->glob
;
710 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
711 struct ttm_buffer_object
*bo
;
712 int ret
= -EBUSY
, put_count
;
714 spin_lock(&glob
->lru_lock
);
715 list_for_each_entry(bo
, &man
->lru
, lru
) {
716 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
722 spin_unlock(&glob
->lru_lock
);
726 kref_get(&bo
->list_kref
);
728 if (!list_empty(&bo
->ddestroy
)) {
729 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, interruptible
,
731 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
735 put_count
= ttm_bo_del_from_lru(bo
);
736 spin_unlock(&glob
->lru_lock
);
740 ttm_bo_list_ref_sub(bo
, put_count
, true);
742 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_gpu
);
743 ttm_bo_unreserve(bo
);
745 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
749 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
751 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
754 (*man
->func
->put_node
)(man
, mem
);
756 EXPORT_SYMBOL(ttm_bo_mem_put
);
759 * Repeatedly evict memory from the LRU for @mem_type until we create enough
760 * space, or we've evicted everything and there isn't enough space.
762 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
764 struct ttm_placement
*placement
,
765 struct ttm_mem_reg
*mem
,
769 struct ttm_bo_device
*bdev
= bo
->bdev
;
770 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
774 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
775 if (unlikely(ret
!= 0))
779 ret
= ttm_mem_evict_first(bdev
, mem_type
,
780 interruptible
, no_wait_gpu
);
781 if (unlikely(ret
!= 0))
784 if (mem
->mm_node
== NULL
)
786 mem
->mem_type
= mem_type
;
790 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
791 uint32_t cur_placement
,
792 uint32_t proposed_placement
)
794 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
795 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
798 * Keep current caching if possible.
801 if ((cur_placement
& caching
) != 0)
802 result
|= (cur_placement
& caching
);
803 else if ((man
->default_caching
& caching
) != 0)
804 result
|= man
->default_caching
;
805 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
806 result
|= TTM_PL_FLAG_CACHED
;
807 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
808 result
|= TTM_PL_FLAG_WC
;
809 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
810 result
|= TTM_PL_FLAG_UNCACHED
;
815 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
817 uint32_t proposed_placement
,
818 uint32_t *masked_placement
)
820 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
822 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
825 if ((proposed_placement
& man
->available_caching
) == 0)
828 cur_flags
|= (proposed_placement
& man
->available_caching
);
830 *masked_placement
= cur_flags
;
835 * Creates space for memory region @mem according to its type.
837 * This function first searches for free space in compatible memory types in
838 * the priority order defined by the driver. If free space isn't found, then
839 * ttm_bo_mem_force_space is attempted in priority order to evict and find
842 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
843 struct ttm_placement
*placement
,
844 struct ttm_mem_reg
*mem
,
848 struct ttm_bo_device
*bdev
= bo
->bdev
;
849 struct ttm_mem_type_manager
*man
;
850 uint32_t mem_type
= TTM_PL_SYSTEM
;
851 uint32_t cur_flags
= 0;
852 bool type_found
= false;
853 bool type_ok
= false;
854 bool has_erestartsys
= false;
858 for (i
= 0; i
< placement
->num_placement
; ++i
) {
859 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
863 man
= &bdev
->man
[mem_type
];
865 type_ok
= ttm_bo_mt_compatible(man
,
867 placement
->placement
[i
],
873 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
876 * Use the access and other non-mapping-related flag bits from
877 * the memory placement flags to the current flags
879 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
880 ~TTM_PL_MASK_MEMTYPE
);
882 if (mem_type
== TTM_PL_SYSTEM
)
885 if (man
->has_type
&& man
->use_type
) {
887 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
895 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
896 mem
->mem_type
= mem_type
;
897 mem
->placement
= cur_flags
;
904 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
905 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
909 man
= &bdev
->man
[mem_type
];
912 if (!ttm_bo_mt_compatible(man
,
914 placement
->busy_placement
[i
],
918 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
921 * Use the access and other non-mapping-related flag bits from
922 * the memory placement flags to the current flags
924 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
925 ~TTM_PL_MASK_MEMTYPE
);
928 if (mem_type
== TTM_PL_SYSTEM
) {
929 mem
->mem_type
= mem_type
;
930 mem
->placement
= cur_flags
;
935 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
936 interruptible
, no_wait_gpu
);
937 if (ret
== 0 && mem
->mm_node
) {
938 mem
->placement
= cur_flags
;
941 if (ret
== -ERESTARTSYS
)
942 has_erestartsys
= true;
944 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
947 EXPORT_SYMBOL(ttm_bo_mem_space
);
949 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
950 struct ttm_placement
*placement
,
955 struct ttm_mem_reg mem
;
956 struct ttm_bo_device
*bdev
= bo
->bdev
;
958 lockdep_assert_held(&bo
->resv
->lock
.base
);
961 * FIXME: It's possible to pipeline buffer moves.
962 * Have the driver move function wait for idle when necessary,
963 * instead of doing it here.
965 spin_lock(&bdev
->fence_lock
);
966 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
967 spin_unlock(&bdev
->fence_lock
);
970 mem
.num_pages
= bo
->num_pages
;
971 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
972 mem
.page_alignment
= bo
->mem
.page_alignment
;
973 mem
.bus
.io_reserved_vm
= false;
974 mem
.bus
.io_reserved_count
= 0;
976 * Determine where to move the buffer.
978 ret
= ttm_bo_mem_space(bo
, placement
, &mem
,
979 interruptible
, no_wait_gpu
);
982 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false,
983 interruptible
, no_wait_gpu
);
985 if (ret
&& mem
.mm_node
)
986 ttm_bo_mem_put(bo
, &mem
);
990 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
991 struct ttm_mem_reg
*mem
)
995 if (mem
->mm_node
&& placement
->lpfn
!= 0 &&
996 (mem
->start
< placement
->fpfn
||
997 mem
->start
+ mem
->num_pages
> placement
->lpfn
))
1000 for (i
= 0; i
< placement
->num_placement
; i
++) {
1001 if ((placement
->placement
[i
] & mem
->placement
&
1002 TTM_PL_MASK_CACHING
) &&
1003 (placement
->placement
[i
] & mem
->placement
&
1010 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1011 struct ttm_placement
*placement
,
1017 lockdep_assert_held(&bo
->resv
->lock
.base
);
1018 /* Check that range is valid */
1019 if (placement
->lpfn
|| placement
->fpfn
)
1020 if (placement
->fpfn
> placement
->lpfn
||
1021 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1024 * Check whether we need to move buffer.
1026 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1028 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
,
1034 * Use the access and other non-mapping-related flag bits from
1035 * the compatible memory placement flags to the active flags
1037 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1038 ~TTM_PL_MASK_MEMTYPE
);
1041 * We might need to add a TTM.
1043 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1044 ret
= ttm_bo_add_ttm(bo
, true);
1050 EXPORT_SYMBOL(ttm_bo_validate
);
1052 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1053 struct ttm_placement
*placement
)
1055 BUG_ON((placement
->fpfn
|| placement
->lpfn
) &&
1056 (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)));
1061 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1062 struct ttm_buffer_object
*bo
,
1064 enum ttm_bo_type type
,
1065 struct ttm_placement
*placement
,
1066 uint32_t page_alignment
,
1068 struct file
*persistent_swap_storage
,
1070 struct sg_table
*sg
,
1071 void (*destroy
) (struct ttm_buffer_object
*))
1074 unsigned long num_pages
;
1075 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1078 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1080 pr_err("Out of kernel memory\n");
1088 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1089 if (num_pages
== 0) {
1090 pr_err("Illegal buffer object size\n");
1095 ttm_mem_global_free(mem_glob
, acc_size
);
1098 bo
->destroy
= destroy
;
1100 kref_init(&bo
->kref
);
1101 kref_init(&bo
->list_kref
);
1102 atomic_set(&bo
->cpu_writers
, 0);
1103 INIT_LIST_HEAD(&bo
->lru
);
1104 INIT_LIST_HEAD(&bo
->ddestroy
);
1105 INIT_LIST_HEAD(&bo
->swap
);
1106 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1108 bo
->glob
= bdev
->glob
;
1110 bo
->num_pages
= num_pages
;
1111 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1112 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1113 bo
->mem
.num_pages
= bo
->num_pages
;
1114 bo
->mem
.mm_node
= NULL
;
1115 bo
->mem
.page_alignment
= page_alignment
;
1116 bo
->mem
.bus
.io_reserved_vm
= false;
1117 bo
->mem
.bus
.io_reserved_count
= 0;
1119 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1120 bo
->persistent_swap_storage
= persistent_swap_storage
;
1121 bo
->acc_size
= acc_size
;
1123 bo
->resv
= &bo
->ttm_resv
;
1124 reservation_object_init(bo
->resv
);
1125 atomic_inc(&bo
->glob
->bo_count
);
1126 drm_vma_node_reset(&bo
->vma_node
);
1128 ret
= ttm_bo_check_placement(bo
, placement
);
1131 * For ttm_bo_type_device buffers, allocate
1132 * address space from the device.
1135 (bo
->type
== ttm_bo_type_device
||
1136 bo
->type
== ttm_bo_type_sg
))
1137 ret
= ttm_bo_setup_vm(bo
);
1139 locked
= ww_mutex_trylock(&bo
->resv
->lock
);
1143 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1145 ttm_bo_unreserve(bo
);
1152 EXPORT_SYMBOL(ttm_bo_init
);
1154 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1155 unsigned long bo_size
,
1156 unsigned struct_size
)
1158 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1161 size
+= ttm_round_pot(struct_size
);
1162 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1163 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1166 EXPORT_SYMBOL(ttm_bo_acc_size
);
1168 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1169 unsigned long bo_size
,
1170 unsigned struct_size
)
1172 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1175 size
+= ttm_round_pot(struct_size
);
1176 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1177 size
+= PAGE_ALIGN(npages
* sizeof(dma_addr_t
));
1178 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1181 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1183 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1185 enum ttm_bo_type type
,
1186 struct ttm_placement
*placement
,
1187 uint32_t page_alignment
,
1189 struct file
*persistent_swap_storage
,
1190 struct ttm_buffer_object
**p_bo
)
1192 struct ttm_buffer_object
*bo
;
1196 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1197 if (unlikely(bo
== NULL
))
1200 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1201 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1202 interruptible
, persistent_swap_storage
, acc_size
,
1204 if (likely(ret
== 0))
1209 EXPORT_SYMBOL(ttm_bo_create
);
1211 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1212 unsigned mem_type
, bool allow_errors
)
1214 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1215 struct ttm_bo_global
*glob
= bdev
->glob
;
1219 * Can't use standard list traversal since we're unlocking.
1222 spin_lock(&glob
->lru_lock
);
1223 while (!list_empty(&man
->lru
)) {
1224 spin_unlock(&glob
->lru_lock
);
1225 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false);
1230 pr_err("Cleanup eviction failed\n");
1233 spin_lock(&glob
->lru_lock
);
1235 spin_unlock(&glob
->lru_lock
);
1239 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1241 struct ttm_mem_type_manager
*man
;
1244 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1245 pr_err("Illegal memory type %d\n", mem_type
);
1248 man
= &bdev
->man
[mem_type
];
1250 if (!man
->has_type
) {
1251 pr_err("Trying to take down uninitialized memory manager type %u\n",
1256 man
->use_type
= false;
1257 man
->has_type
= false;
1261 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1263 ret
= (*man
->func
->takedown
)(man
);
1268 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1270 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1272 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1274 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1275 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1279 if (!man
->has_type
) {
1280 pr_err("Memory type %u has not been initialized\n", mem_type
);
1284 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1286 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1288 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1289 unsigned long p_size
)
1292 struct ttm_mem_type_manager
*man
;
1294 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1295 man
= &bdev
->man
[type
];
1296 BUG_ON(man
->has_type
);
1297 man
->io_reserve_fastpath
= true;
1298 man
->use_io_reserve_lru
= false;
1299 mutex_init(&man
->io_reserve_mutex
);
1300 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1302 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1308 if (type
!= TTM_PL_SYSTEM
) {
1309 ret
= (*man
->func
->init
)(man
, p_size
);
1313 man
->has_type
= true;
1314 man
->use_type
= true;
1317 INIT_LIST_HEAD(&man
->lru
);
1321 EXPORT_SYMBOL(ttm_bo_init_mm
);
1323 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1325 struct ttm_bo_global
*glob
=
1326 container_of(kobj
, struct ttm_bo_global
, kobj
);
1328 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1329 __free_page(glob
->dummy_read_page
);
1333 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1335 struct ttm_bo_global
*glob
= ref
->object
;
1337 kobject_del(&glob
->kobj
);
1338 kobject_put(&glob
->kobj
);
1340 EXPORT_SYMBOL(ttm_bo_global_release
);
1342 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1344 struct ttm_bo_global_ref
*bo_ref
=
1345 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1346 struct ttm_bo_global
*glob
= ref
->object
;
1349 mutex_init(&glob
->device_list_mutex
);
1350 spin_lock_init(&glob
->lru_lock
);
1351 glob
->mem_glob
= bo_ref
->mem_glob
;
1352 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1354 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1359 INIT_LIST_HEAD(&glob
->swap_lru
);
1360 INIT_LIST_HEAD(&glob
->device_list
);
1362 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1363 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1364 if (unlikely(ret
!= 0)) {
1365 pr_err("Could not register buffer object swapout\n");
1369 atomic_set(&glob
->bo_count
, 0);
1371 ret
= kobject_init_and_add(
1372 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1373 if (unlikely(ret
!= 0))
1374 kobject_put(&glob
->kobj
);
1377 __free_page(glob
->dummy_read_page
);
1382 EXPORT_SYMBOL(ttm_bo_global_init
);
1385 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1388 unsigned i
= TTM_NUM_MEM_TYPES
;
1389 struct ttm_mem_type_manager
*man
;
1390 struct ttm_bo_global
*glob
= bdev
->glob
;
1393 man
= &bdev
->man
[i
];
1394 if (man
->has_type
) {
1395 man
->use_type
= false;
1396 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1398 pr_err("DRM memory manager type %d is not clean\n",
1401 man
->has_type
= false;
1405 mutex_lock(&glob
->device_list_mutex
);
1406 list_del(&bdev
->device_list
);
1407 mutex_unlock(&glob
->device_list_mutex
);
1409 cancel_delayed_work_sync(&bdev
->wq
);
1411 while (ttm_bo_delayed_delete(bdev
, true))
1414 spin_lock(&glob
->lru_lock
);
1415 if (list_empty(&bdev
->ddestroy
))
1416 TTM_DEBUG("Delayed destroy list was clean\n");
1418 if (list_empty(&bdev
->man
[0].lru
))
1419 TTM_DEBUG("Swap list was clean\n");
1420 spin_unlock(&glob
->lru_lock
);
1422 drm_vma_offset_manager_destroy(&bdev
->vma_manager
);
1426 EXPORT_SYMBOL(ttm_bo_device_release
);
1428 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1429 struct ttm_bo_global
*glob
,
1430 struct ttm_bo_driver
*driver
,
1431 uint64_t file_page_offset
,
1436 bdev
->driver
= driver
;
1438 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1441 * Initialize the system memory buffer type.
1442 * Other types need to be driver / IOCTL initialized.
1444 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1445 if (unlikely(ret
!= 0))
1448 drm_vma_offset_manager_init(&bdev
->vma_manager
, file_page_offset
,
1450 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1451 INIT_LIST_HEAD(&bdev
->ddestroy
);
1452 bdev
->dev_mapping
= NULL
;
1454 bdev
->need_dma32
= need_dma32
;
1456 spin_lock_init(&bdev
->fence_lock
);
1457 mutex_lock(&glob
->device_list_mutex
);
1458 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1459 mutex_unlock(&glob
->device_list_mutex
);
1465 EXPORT_SYMBOL(ttm_bo_device_init
);
1468 * buffer object vm functions.
1471 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1473 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1475 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1476 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1479 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1482 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1488 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1490 struct ttm_bo_device
*bdev
= bo
->bdev
;
1492 drm_vma_node_unmap(&bo
->vma_node
, bdev
->dev_mapping
);
1493 ttm_mem_io_free_vm(bo
);
1496 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1498 struct ttm_bo_device
*bdev
= bo
->bdev
;
1499 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1501 ttm_mem_io_lock(man
, false);
1502 ttm_bo_unmap_virtual_locked(bo
);
1503 ttm_mem_io_unlock(man
);
1507 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1512 * @bo: the buffer to allocate address space for
1514 * Allocate address space in the drm device so that applications
1515 * can mmap the buffer and access the contents. This only
1516 * applies to ttm_bo_type_device objects as others are not
1517 * placed in the drm device address space.
1520 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1522 struct ttm_bo_device
*bdev
= bo
->bdev
;
1524 return drm_vma_offset_add(&bdev
->vma_manager
, &bo
->vma_node
,
1528 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1529 bool lazy
, bool interruptible
, bool no_wait
)
1531 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1532 struct ttm_bo_device
*bdev
= bo
->bdev
;
1536 if (likely(bo
->sync_obj
== NULL
))
1539 while (bo
->sync_obj
) {
1541 if (driver
->sync_obj_signaled(bo
->sync_obj
)) {
1542 void *tmp_obj
= bo
->sync_obj
;
1543 bo
->sync_obj
= NULL
;
1544 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1545 spin_unlock(&bdev
->fence_lock
);
1546 driver
->sync_obj_unref(&tmp_obj
);
1547 spin_lock(&bdev
->fence_lock
);
1554 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1555 spin_unlock(&bdev
->fence_lock
);
1556 ret
= driver
->sync_obj_wait(sync_obj
,
1557 lazy
, interruptible
);
1558 if (unlikely(ret
!= 0)) {
1559 driver
->sync_obj_unref(&sync_obj
);
1560 spin_lock(&bdev
->fence_lock
);
1563 spin_lock(&bdev
->fence_lock
);
1564 if (likely(bo
->sync_obj
== sync_obj
)) {
1565 void *tmp_obj
= bo
->sync_obj
;
1566 bo
->sync_obj
= NULL
;
1567 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1569 spin_unlock(&bdev
->fence_lock
);
1570 driver
->sync_obj_unref(&sync_obj
);
1571 driver
->sync_obj_unref(&tmp_obj
);
1572 spin_lock(&bdev
->fence_lock
);
1574 spin_unlock(&bdev
->fence_lock
);
1575 driver
->sync_obj_unref(&sync_obj
);
1576 spin_lock(&bdev
->fence_lock
);
1581 EXPORT_SYMBOL(ttm_bo_wait
);
1583 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1585 struct ttm_bo_device
*bdev
= bo
->bdev
;
1589 * Using ttm_bo_reserve makes sure the lru lists are updated.
1592 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1593 if (unlikely(ret
!= 0))
1595 spin_lock(&bdev
->fence_lock
);
1596 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1597 spin_unlock(&bdev
->fence_lock
);
1598 if (likely(ret
== 0))
1599 atomic_inc(&bo
->cpu_writers
);
1600 ttm_bo_unreserve(bo
);
1603 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1605 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1607 atomic_dec(&bo
->cpu_writers
);
1609 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1612 * A buffer object shrink method that tries to swap out the first
1613 * buffer object on the bo_global::swap_lru list.
1616 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1618 struct ttm_bo_global
*glob
=
1619 container_of(shrink
, struct ttm_bo_global
, shrink
);
1620 struct ttm_buffer_object
*bo
;
1623 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1625 spin_lock(&glob
->lru_lock
);
1626 list_for_each_entry(bo
, &glob
->swap_lru
, swap
) {
1627 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
1633 spin_unlock(&glob
->lru_lock
);
1637 kref_get(&bo
->list_kref
);
1639 if (!list_empty(&bo
->ddestroy
)) {
1640 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, false, false);
1641 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1645 put_count
= ttm_bo_del_from_lru(bo
);
1646 spin_unlock(&glob
->lru_lock
);
1648 ttm_bo_list_ref_sub(bo
, put_count
, true);
1651 * Wait for GPU, then move to system cached.
1654 spin_lock(&bo
->bdev
->fence_lock
);
1655 ret
= ttm_bo_wait(bo
, false, false, false);
1656 spin_unlock(&bo
->bdev
->fence_lock
);
1658 if (unlikely(ret
!= 0))
1661 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1662 struct ttm_mem_reg evict_mem
;
1664 evict_mem
= bo
->mem
;
1665 evict_mem
.mm_node
= NULL
;
1666 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1667 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1669 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1671 if (unlikely(ret
!= 0))
1675 ttm_bo_unmap_virtual(bo
);
1678 * Swap out. Buffer will be swapped in again as soon as
1679 * anyone tries to access a ttm page.
1682 if (bo
->bdev
->driver
->swap_notify
)
1683 bo
->bdev
->driver
->swap_notify(bo
);
1685 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1690 * Unreserve without putting on LRU to avoid swapping out an
1691 * already swapped buffer.
1694 ww_mutex_unlock(&bo
->resv
->lock
);
1695 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1699 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1701 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1704 EXPORT_SYMBOL(ttm_bo_swapout_all
);