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_swapout(struct ttm_mem_shrink
*shrink
);
49 static void ttm_bo_global_kobj_release(struct kobject
*kobj
);
51 static struct attribute ttm_bo_count
= {
56 static inline int ttm_mem_type_from_flags(uint32_t flags
, uint32_t *mem_type
)
60 for (i
= 0; i
<= TTM_PL_PRIV5
; i
++)
61 if (flags
& (1 << i
)) {
68 static void ttm_mem_type_debug(struct ttm_bo_device
*bdev
, int mem_type
)
70 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
72 pr_err(" has_type: %d\n", man
->has_type
);
73 pr_err(" use_type: %d\n", man
->use_type
);
74 pr_err(" flags: 0x%08X\n", man
->flags
);
75 pr_err(" gpu_offset: 0x%08lX\n", man
->gpu_offset
);
76 pr_err(" size: %llu\n", man
->size
);
77 pr_err(" available_caching: 0x%08X\n", man
->available_caching
);
78 pr_err(" default_caching: 0x%08X\n", man
->default_caching
);
79 if (mem_type
!= TTM_PL_SYSTEM
)
80 (*man
->func
->debug
)(man
, TTM_PFX
);
83 static void ttm_bo_mem_space_debug(struct ttm_buffer_object
*bo
,
84 struct ttm_placement
*placement
)
88 pr_err("No space for %p (%lu pages, %luK, %luM)\n",
89 bo
, bo
->mem
.num_pages
, bo
->mem
.size
>> 10,
91 for (i
= 0; i
< placement
->num_placement
; i
++) {
92 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
96 pr_err(" placement[%d]=0x%08X (%d)\n",
97 i
, placement
->placement
[i
], mem_type
);
98 ttm_mem_type_debug(bo
->bdev
, mem_type
);
102 static ssize_t
ttm_bo_global_show(struct kobject
*kobj
,
103 struct attribute
*attr
,
106 struct ttm_bo_global
*glob
=
107 container_of(kobj
, struct ttm_bo_global
, kobj
);
109 return snprintf(buffer
, PAGE_SIZE
, "%lu\n",
110 (unsigned long) atomic_read(&glob
->bo_count
));
113 static struct attribute
*ttm_bo_global_attrs
[] = {
118 static const struct sysfs_ops ttm_bo_global_ops
= {
119 .show
= &ttm_bo_global_show
122 static struct kobj_type ttm_bo_glob_kobj_type
= {
123 .release
= &ttm_bo_global_kobj_release
,
124 .sysfs_ops
= &ttm_bo_global_ops
,
125 .default_attrs
= ttm_bo_global_attrs
129 static inline uint32_t ttm_bo_type_flags(unsigned type
)
134 static void ttm_bo_release_list(struct kref
*list_kref
)
136 struct ttm_buffer_object
*bo
=
137 container_of(list_kref
, struct ttm_buffer_object
, list_kref
);
138 struct ttm_bo_device
*bdev
= bo
->bdev
;
139 size_t acc_size
= bo
->acc_size
;
141 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
142 BUG_ON(atomic_read(&bo
->kref
.refcount
));
143 BUG_ON(atomic_read(&bo
->cpu_writers
));
144 BUG_ON(bo
->sync_obj
!= NULL
);
145 BUG_ON(bo
->mem
.mm_node
!= NULL
);
146 BUG_ON(!list_empty(&bo
->lru
));
147 BUG_ON(!list_empty(&bo
->ddestroy
));
150 ttm_tt_destroy(bo
->ttm
);
151 atomic_dec(&bo
->glob
->bo_count
);
152 if (bo
->resv
== &bo
->ttm_resv
)
153 reservation_object_fini(&bo
->ttm_resv
);
154 mutex_destroy(&bo
->wu_mutex
);
160 ttm_mem_global_free(bdev
->glob
->mem_glob
, acc_size
);
163 void ttm_bo_add_to_lru(struct ttm_buffer_object
*bo
)
165 struct ttm_bo_device
*bdev
= bo
->bdev
;
166 struct ttm_mem_type_manager
*man
;
168 lockdep_assert_held(&bo
->resv
->lock
.base
);
170 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
172 BUG_ON(!list_empty(&bo
->lru
));
174 man
= &bdev
->man
[bo
->mem
.mem_type
];
175 list_add_tail(&bo
->lru
, &man
->lru
);
176 kref_get(&bo
->list_kref
);
178 if (bo
->ttm
!= NULL
) {
179 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
180 kref_get(&bo
->list_kref
);
184 EXPORT_SYMBOL(ttm_bo_add_to_lru
);
186 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
190 if (!list_empty(&bo
->swap
)) {
191 list_del_init(&bo
->swap
);
194 if (!list_empty(&bo
->lru
)) {
195 list_del_init(&bo
->lru
);
200 * TODO: Add a driver hook to delete from
201 * driver-specific LRU's here.
207 static void ttm_bo_ref_bug(struct kref
*list_kref
)
212 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
215 kref_sub(&bo
->list_kref
, count
,
216 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
219 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object
*bo
)
223 spin_lock(&bo
->glob
->lru_lock
);
224 put_count
= ttm_bo_del_from_lru(bo
);
225 spin_unlock(&bo
->glob
->lru_lock
);
226 ttm_bo_list_ref_sub(bo
, put_count
, true);
228 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru
);
231 * Call bo->mutex locked.
233 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
235 struct ttm_bo_device
*bdev
= bo
->bdev
;
236 struct ttm_bo_global
*glob
= bo
->glob
;
238 uint32_t page_flags
= 0;
240 TTM_ASSERT_LOCKED(&bo
->mutex
);
243 if (bdev
->need_dma32
)
244 page_flags
|= TTM_PAGE_FLAG_DMA32
;
247 case ttm_bo_type_device
:
249 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
250 case ttm_bo_type_kernel
:
251 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
252 page_flags
, glob
->dummy_read_page
);
253 if (unlikely(bo
->ttm
== NULL
))
257 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
258 page_flags
| TTM_PAGE_FLAG_SG
,
259 glob
->dummy_read_page
);
260 if (unlikely(bo
->ttm
== NULL
)) {
264 bo
->ttm
->sg
= bo
->sg
;
267 pr_err("Illegal buffer object type\n");
275 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
276 struct ttm_mem_reg
*mem
,
277 bool evict
, bool interruptible
,
280 struct ttm_bo_device
*bdev
= bo
->bdev
;
281 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
282 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
283 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
284 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
287 if (old_is_pci
|| new_is_pci
||
288 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
289 ret
= ttm_mem_io_lock(old_man
, true);
290 if (unlikely(ret
!= 0))
292 ttm_bo_unmap_virtual_locked(bo
);
293 ttm_mem_io_unlock(old_man
);
297 * Create and bind a ttm if required.
300 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
301 if (bo
->ttm
== NULL
) {
302 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
303 ret
= ttm_bo_add_ttm(bo
, zero
);
308 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
312 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
313 ret
= ttm_tt_bind(bo
->ttm
, mem
);
318 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
319 if (bdev
->driver
->move_notify
)
320 bdev
->driver
->move_notify(bo
, mem
);
327 if (bdev
->driver
->move_notify
)
328 bdev
->driver
->move_notify(bo
, mem
);
330 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
331 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
332 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_gpu
, mem
);
333 else if (bdev
->driver
->move
)
334 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
337 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_gpu
, mem
);
340 if (bdev
->driver
->move_notify
) {
341 struct ttm_mem_reg tmp_mem
= *mem
;
344 bdev
->driver
->move_notify(bo
, mem
);
354 if (bdev
->driver
->invalidate_caches
) {
355 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
357 pr_err("Can not flush read caches\n");
362 if (bo
->mem
.mm_node
) {
363 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
364 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
365 bo
->cur_placement
= bo
->mem
.placement
;
372 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
373 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
374 ttm_tt_unbind(bo
->ttm
);
375 ttm_tt_destroy(bo
->ttm
);
384 * Will release GPU memory type usage on destruction.
385 * This is the place to put in driver specific hooks to release
386 * driver private resources.
387 * Will release the bo::reserved lock.
390 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
392 if (bo
->bdev
->driver
->move_notify
)
393 bo
->bdev
->driver
->move_notify(bo
, NULL
);
396 ttm_tt_unbind(bo
->ttm
);
397 ttm_tt_destroy(bo
->ttm
);
400 ttm_bo_mem_put(bo
, &bo
->mem
);
402 ww_mutex_unlock (&bo
->resv
->lock
);
405 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
407 struct ttm_bo_device
*bdev
= bo
->bdev
;
408 struct ttm_bo_global
*glob
= bo
->glob
;
409 struct ttm_bo_driver
*driver
= bdev
->driver
;
410 void *sync_obj
= NULL
;
414 spin_lock(&glob
->lru_lock
);
415 ret
= __ttm_bo_reserve(bo
, false, true, false, 0);
417 spin_lock(&bdev
->fence_lock
);
418 (void) ttm_bo_wait(bo
, false, false, true);
419 if (!ret
&& !bo
->sync_obj
) {
420 spin_unlock(&bdev
->fence_lock
);
421 put_count
= ttm_bo_del_from_lru(bo
);
423 spin_unlock(&glob
->lru_lock
);
424 ttm_bo_cleanup_memtype_use(bo
);
426 ttm_bo_list_ref_sub(bo
, put_count
, true);
431 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
432 spin_unlock(&bdev
->fence_lock
);
437 * Make NO_EVICT bos immediately available to
438 * shrinkers, now that they are queued for
441 if (bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
) {
442 bo
->mem
.placement
&= ~TTM_PL_FLAG_NO_EVICT
;
443 ttm_bo_add_to_lru(bo
);
446 __ttm_bo_unreserve(bo
);
449 kref_get(&bo
->list_kref
);
450 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
451 spin_unlock(&glob
->lru_lock
);
454 driver
->sync_obj_flush(sync_obj
);
455 driver
->sync_obj_unref(&sync_obj
);
457 schedule_delayed_work(&bdev
->wq
,
458 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
462 * function ttm_bo_cleanup_refs_and_unlock
463 * If bo idle, remove from delayed- and lru lists, and unref.
464 * If not idle, do nothing.
466 * Must be called with lru_lock and reservation held, this function
467 * will drop both before returning.
469 * @interruptible Any sleeps should occur interruptibly.
470 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
473 static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object
*bo
,
477 struct ttm_bo_device
*bdev
= bo
->bdev
;
478 struct ttm_bo_driver
*driver
= bdev
->driver
;
479 struct ttm_bo_global
*glob
= bo
->glob
;
483 spin_lock(&bdev
->fence_lock
);
484 ret
= ttm_bo_wait(bo
, false, false, true);
486 if (ret
&& !no_wait_gpu
) {
490 * Take a reference to the fence and unreserve,
491 * at this point the buffer should be dead, so
492 * no new sync objects can be attached.
494 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
495 spin_unlock(&bdev
->fence_lock
);
497 __ttm_bo_unreserve(bo
);
498 spin_unlock(&glob
->lru_lock
);
500 ret
= driver
->sync_obj_wait(sync_obj
, false, interruptible
);
501 driver
->sync_obj_unref(&sync_obj
);
506 * remove sync_obj with ttm_bo_wait, the wait should be
507 * finished, and no new wait object should have been added.
509 spin_lock(&bdev
->fence_lock
);
510 ret
= ttm_bo_wait(bo
, false, false, true);
512 spin_unlock(&bdev
->fence_lock
);
516 spin_lock(&glob
->lru_lock
);
517 ret
= __ttm_bo_reserve(bo
, false, true, false, 0);
520 * We raced, and lost, someone else holds the reservation now,
521 * and is probably busy in ttm_bo_cleanup_memtype_use.
523 * Even if it's not the case, because we finished waiting any
524 * delayed destruction would succeed, so just return success
528 spin_unlock(&glob
->lru_lock
);
532 spin_unlock(&bdev
->fence_lock
);
534 if (ret
|| unlikely(list_empty(&bo
->ddestroy
))) {
535 __ttm_bo_unreserve(bo
);
536 spin_unlock(&glob
->lru_lock
);
540 put_count
= ttm_bo_del_from_lru(bo
);
541 list_del_init(&bo
->ddestroy
);
544 spin_unlock(&glob
->lru_lock
);
545 ttm_bo_cleanup_memtype_use(bo
);
547 ttm_bo_list_ref_sub(bo
, put_count
, true);
553 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
554 * encountered buffers.
557 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
559 struct ttm_bo_global
*glob
= bdev
->glob
;
560 struct ttm_buffer_object
*entry
= NULL
;
563 spin_lock(&glob
->lru_lock
);
564 if (list_empty(&bdev
->ddestroy
))
567 entry
= list_first_entry(&bdev
->ddestroy
,
568 struct ttm_buffer_object
, ddestroy
);
569 kref_get(&entry
->list_kref
);
572 struct ttm_buffer_object
*nentry
= NULL
;
574 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
575 nentry
= list_first_entry(&entry
->ddestroy
,
576 struct ttm_buffer_object
, ddestroy
);
577 kref_get(&nentry
->list_kref
);
580 ret
= __ttm_bo_reserve(entry
, false, true, false, 0);
581 if (remove_all
&& ret
) {
582 spin_unlock(&glob
->lru_lock
);
583 ret
= __ttm_bo_reserve(entry
, false, false,
585 spin_lock(&glob
->lru_lock
);
589 ret
= ttm_bo_cleanup_refs_and_unlock(entry
, false,
592 spin_unlock(&glob
->lru_lock
);
594 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
600 spin_lock(&glob
->lru_lock
);
601 if (list_empty(&entry
->ddestroy
))
606 spin_unlock(&glob
->lru_lock
);
609 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
613 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
615 struct ttm_bo_device
*bdev
=
616 container_of(work
, struct ttm_bo_device
, wq
.work
);
618 if (ttm_bo_delayed_delete(bdev
, false)) {
619 schedule_delayed_work(&bdev
->wq
,
620 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
624 static void ttm_bo_release(struct kref
*kref
)
626 struct ttm_buffer_object
*bo
=
627 container_of(kref
, struct ttm_buffer_object
, kref
);
628 struct ttm_bo_device
*bdev
= bo
->bdev
;
629 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
631 drm_vma_offset_remove(&bdev
->vma_manager
, &bo
->vma_node
);
632 ttm_mem_io_lock(man
, false);
633 ttm_mem_io_free_vm(bo
);
634 ttm_mem_io_unlock(man
);
635 ttm_bo_cleanup_refs_or_queue(bo
);
636 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
639 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
641 struct ttm_buffer_object
*bo
= *p_bo
;
644 kref_put(&bo
->kref
, ttm_bo_release
);
646 EXPORT_SYMBOL(ttm_bo_unref
);
648 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
650 return cancel_delayed_work_sync(&bdev
->wq
);
652 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
654 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
657 schedule_delayed_work(&bdev
->wq
,
658 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
660 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
662 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
665 struct ttm_bo_device
*bdev
= bo
->bdev
;
666 struct ttm_mem_reg evict_mem
;
667 struct ttm_placement placement
;
670 spin_lock(&bdev
->fence_lock
);
671 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
672 spin_unlock(&bdev
->fence_lock
);
674 if (unlikely(ret
!= 0)) {
675 if (ret
!= -ERESTARTSYS
) {
676 pr_err("Failed to expire sync object before buffer eviction\n");
681 lockdep_assert_held(&bo
->resv
->lock
.base
);
684 evict_mem
.mm_node
= NULL
;
685 evict_mem
.bus
.io_reserved_vm
= false;
686 evict_mem
.bus
.io_reserved_count
= 0;
690 placement
.num_placement
= 0;
691 placement
.num_busy_placement
= 0;
692 bdev
->driver
->evict_flags(bo
, &placement
);
693 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
696 if (ret
!= -ERESTARTSYS
) {
697 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
699 ttm_bo_mem_space_debug(bo
, &placement
);
704 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
707 if (ret
!= -ERESTARTSYS
)
708 pr_err("Buffer eviction failed\n");
709 ttm_bo_mem_put(bo
, &evict_mem
);
717 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
722 struct ttm_bo_global
*glob
= bdev
->glob
;
723 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
724 struct ttm_buffer_object
*bo
;
725 int ret
= -EBUSY
, put_count
;
727 spin_lock(&glob
->lru_lock
);
728 list_for_each_entry(bo
, &man
->lru
, lru
) {
729 ret
= __ttm_bo_reserve(bo
, false, true, false, 0);
735 spin_unlock(&glob
->lru_lock
);
739 kref_get(&bo
->list_kref
);
741 if (!list_empty(&bo
->ddestroy
)) {
742 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, interruptible
,
744 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
748 put_count
= ttm_bo_del_from_lru(bo
);
749 spin_unlock(&glob
->lru_lock
);
753 ttm_bo_list_ref_sub(bo
, put_count
, true);
755 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_gpu
);
756 ttm_bo_unreserve(bo
);
758 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
762 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
764 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
767 (*man
->func
->put_node
)(man
, mem
);
769 EXPORT_SYMBOL(ttm_bo_mem_put
);
772 * Repeatedly evict memory from the LRU for @mem_type until we create enough
773 * space, or we've evicted everything and there isn't enough space.
775 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
777 struct ttm_placement
*placement
,
778 struct ttm_mem_reg
*mem
,
782 struct ttm_bo_device
*bdev
= bo
->bdev
;
783 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
787 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
788 if (unlikely(ret
!= 0))
792 ret
= ttm_mem_evict_first(bdev
, mem_type
,
793 interruptible
, no_wait_gpu
);
794 if (unlikely(ret
!= 0))
797 if (mem
->mm_node
== NULL
)
799 mem
->mem_type
= mem_type
;
803 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
804 uint32_t cur_placement
,
805 uint32_t proposed_placement
)
807 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
808 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
811 * Keep current caching if possible.
814 if ((cur_placement
& caching
) != 0)
815 result
|= (cur_placement
& caching
);
816 else if ((man
->default_caching
& caching
) != 0)
817 result
|= man
->default_caching
;
818 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
819 result
|= TTM_PL_FLAG_CACHED
;
820 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
821 result
|= TTM_PL_FLAG_WC
;
822 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
823 result
|= TTM_PL_FLAG_UNCACHED
;
828 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
830 uint32_t proposed_placement
,
831 uint32_t *masked_placement
)
833 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
835 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
838 if ((proposed_placement
& man
->available_caching
) == 0)
841 cur_flags
|= (proposed_placement
& man
->available_caching
);
843 *masked_placement
= cur_flags
;
848 * Creates space for memory region @mem according to its type.
850 * This function first searches for free space in compatible memory types in
851 * the priority order defined by the driver. If free space isn't found, then
852 * ttm_bo_mem_force_space is attempted in priority order to evict and find
855 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
856 struct ttm_placement
*placement
,
857 struct ttm_mem_reg
*mem
,
861 struct ttm_bo_device
*bdev
= bo
->bdev
;
862 struct ttm_mem_type_manager
*man
;
863 uint32_t mem_type
= TTM_PL_SYSTEM
;
864 uint32_t cur_flags
= 0;
865 bool type_found
= false;
866 bool type_ok
= false;
867 bool has_erestartsys
= false;
871 for (i
= 0; i
< placement
->num_placement
; ++i
) {
872 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
876 man
= &bdev
->man
[mem_type
];
878 type_ok
= ttm_bo_mt_compatible(man
,
880 placement
->placement
[i
],
886 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
889 * Use the access and other non-mapping-related flag bits from
890 * the memory placement flags to the current flags
892 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
893 ~TTM_PL_MASK_MEMTYPE
);
895 if (mem_type
== TTM_PL_SYSTEM
)
898 if (man
->has_type
&& man
->use_type
) {
900 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
908 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
909 mem
->mem_type
= mem_type
;
910 mem
->placement
= cur_flags
;
917 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
918 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
922 man
= &bdev
->man
[mem_type
];
925 if (!ttm_bo_mt_compatible(man
,
927 placement
->busy_placement
[i
],
931 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
934 * Use the access and other non-mapping-related flag bits from
935 * the memory placement flags to the current flags
937 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
938 ~TTM_PL_MASK_MEMTYPE
);
941 if (mem_type
== TTM_PL_SYSTEM
) {
942 mem
->mem_type
= mem_type
;
943 mem
->placement
= cur_flags
;
948 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
949 interruptible
, no_wait_gpu
);
950 if (ret
== 0 && mem
->mm_node
) {
951 mem
->placement
= cur_flags
;
954 if (ret
== -ERESTARTSYS
)
955 has_erestartsys
= true;
957 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
960 EXPORT_SYMBOL(ttm_bo_mem_space
);
962 static int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
963 struct ttm_placement
*placement
,
968 struct ttm_mem_reg mem
;
969 struct ttm_bo_device
*bdev
= bo
->bdev
;
971 lockdep_assert_held(&bo
->resv
->lock
.base
);
974 * FIXME: It's possible to pipeline buffer moves.
975 * Have the driver move function wait for idle when necessary,
976 * instead of doing it here.
978 spin_lock(&bdev
->fence_lock
);
979 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
980 spin_unlock(&bdev
->fence_lock
);
983 mem
.num_pages
= bo
->num_pages
;
984 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
985 mem
.page_alignment
= bo
->mem
.page_alignment
;
986 mem
.bus
.io_reserved_vm
= false;
987 mem
.bus
.io_reserved_count
= 0;
989 * Determine where to move the buffer.
991 ret
= ttm_bo_mem_space(bo
, placement
, &mem
,
992 interruptible
, no_wait_gpu
);
995 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false,
996 interruptible
, no_wait_gpu
);
998 if (ret
&& mem
.mm_node
)
999 ttm_bo_mem_put(bo
, &mem
);
1003 static bool ttm_bo_mem_compat(struct ttm_placement
*placement
,
1004 struct ttm_mem_reg
*mem
,
1005 uint32_t *new_flags
)
1009 if (mem
->mm_node
&& placement
->lpfn
!= 0 &&
1010 (mem
->start
< placement
->fpfn
||
1011 mem
->start
+ mem
->num_pages
> placement
->lpfn
))
1014 for (i
= 0; i
< placement
->num_placement
; i
++) {
1015 *new_flags
= placement
->placement
[i
];
1016 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1017 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1021 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1022 *new_flags
= placement
->busy_placement
[i
];
1023 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1024 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1031 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1032 struct ttm_placement
*placement
,
1039 lockdep_assert_held(&bo
->resv
->lock
.base
);
1040 /* Check that range is valid */
1041 if (placement
->lpfn
|| placement
->fpfn
)
1042 if (placement
->fpfn
> placement
->lpfn
||
1043 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1046 * Check whether we need to move buffer.
1048 if (!ttm_bo_mem_compat(placement
, &bo
->mem
, &new_flags
)) {
1049 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
,
1055 * Use the access and other non-mapping-related flag bits from
1056 * the compatible memory placement flags to the active flags
1058 ttm_flag_masked(&bo
->mem
.placement
, new_flags
,
1059 ~TTM_PL_MASK_MEMTYPE
);
1062 * We might need to add a TTM.
1064 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1065 ret
= ttm_bo_add_ttm(bo
, true);
1071 EXPORT_SYMBOL(ttm_bo_validate
);
1073 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1074 struct ttm_placement
*placement
)
1076 BUG_ON((placement
->fpfn
|| placement
->lpfn
) &&
1077 (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)));
1082 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1083 struct ttm_buffer_object
*bo
,
1085 enum ttm_bo_type type
,
1086 struct ttm_placement
*placement
,
1087 uint32_t page_alignment
,
1089 struct file
*persistent_swap_storage
,
1091 struct sg_table
*sg
,
1092 void (*destroy
) (struct ttm_buffer_object
*))
1095 unsigned long num_pages
;
1096 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1099 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1101 pr_err("Out of kernel memory\n");
1109 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1110 if (num_pages
== 0) {
1111 pr_err("Illegal buffer object size\n");
1116 ttm_mem_global_free(mem_glob
, acc_size
);
1119 bo
->destroy
= destroy
;
1121 kref_init(&bo
->kref
);
1122 kref_init(&bo
->list_kref
);
1123 atomic_set(&bo
->cpu_writers
, 0);
1124 INIT_LIST_HEAD(&bo
->lru
);
1125 INIT_LIST_HEAD(&bo
->ddestroy
);
1126 INIT_LIST_HEAD(&bo
->swap
);
1127 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1128 mutex_init(&bo
->wu_mutex
);
1130 bo
->glob
= bdev
->glob
;
1132 bo
->num_pages
= num_pages
;
1133 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1134 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1135 bo
->mem
.num_pages
= bo
->num_pages
;
1136 bo
->mem
.mm_node
= NULL
;
1137 bo
->mem
.page_alignment
= page_alignment
;
1138 bo
->mem
.bus
.io_reserved_vm
= false;
1139 bo
->mem
.bus
.io_reserved_count
= 0;
1141 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1142 bo
->persistent_swap_storage
= persistent_swap_storage
;
1143 bo
->acc_size
= acc_size
;
1145 bo
->resv
= &bo
->ttm_resv
;
1146 reservation_object_init(bo
->resv
);
1147 atomic_inc(&bo
->glob
->bo_count
);
1148 drm_vma_node_reset(&bo
->vma_node
);
1150 ret
= ttm_bo_check_placement(bo
, placement
);
1153 * For ttm_bo_type_device buffers, allocate
1154 * address space from the device.
1157 (bo
->type
== ttm_bo_type_device
||
1158 bo
->type
== ttm_bo_type_sg
))
1159 ret
= drm_vma_offset_add(&bdev
->vma_manager
, &bo
->vma_node
,
1162 locked
= ww_mutex_trylock(&bo
->resv
->lock
);
1166 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1168 ttm_bo_unreserve(bo
);
1175 EXPORT_SYMBOL(ttm_bo_init
);
1177 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1178 unsigned long bo_size
,
1179 unsigned struct_size
)
1181 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1184 size
+= ttm_round_pot(struct_size
);
1185 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1186 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1189 EXPORT_SYMBOL(ttm_bo_acc_size
);
1191 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1192 unsigned long bo_size
,
1193 unsigned struct_size
)
1195 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1198 size
+= ttm_round_pot(struct_size
);
1199 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1200 size
+= PAGE_ALIGN(npages
* sizeof(dma_addr_t
));
1201 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1204 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1206 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1208 enum ttm_bo_type type
,
1209 struct ttm_placement
*placement
,
1210 uint32_t page_alignment
,
1212 struct file
*persistent_swap_storage
,
1213 struct ttm_buffer_object
**p_bo
)
1215 struct ttm_buffer_object
*bo
;
1219 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1220 if (unlikely(bo
== NULL
))
1223 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1224 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1225 interruptible
, persistent_swap_storage
, acc_size
,
1227 if (likely(ret
== 0))
1232 EXPORT_SYMBOL(ttm_bo_create
);
1234 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1235 unsigned mem_type
, bool allow_errors
)
1237 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1238 struct ttm_bo_global
*glob
= bdev
->glob
;
1242 * Can't use standard list traversal since we're unlocking.
1245 spin_lock(&glob
->lru_lock
);
1246 while (!list_empty(&man
->lru
)) {
1247 spin_unlock(&glob
->lru_lock
);
1248 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false);
1253 pr_err("Cleanup eviction failed\n");
1256 spin_lock(&glob
->lru_lock
);
1258 spin_unlock(&glob
->lru_lock
);
1262 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1264 struct ttm_mem_type_manager
*man
;
1267 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1268 pr_err("Illegal memory type %d\n", mem_type
);
1271 man
= &bdev
->man
[mem_type
];
1273 if (!man
->has_type
) {
1274 pr_err("Trying to take down uninitialized memory manager type %u\n",
1279 man
->use_type
= false;
1280 man
->has_type
= false;
1284 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1286 ret
= (*man
->func
->takedown
)(man
);
1291 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1293 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1295 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1297 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1298 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1302 if (!man
->has_type
) {
1303 pr_err("Memory type %u has not been initialized\n", mem_type
);
1307 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1309 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1311 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1312 unsigned long p_size
)
1315 struct ttm_mem_type_manager
*man
;
1317 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1318 man
= &bdev
->man
[type
];
1319 BUG_ON(man
->has_type
);
1320 man
->io_reserve_fastpath
= true;
1321 man
->use_io_reserve_lru
= false;
1322 mutex_init(&man
->io_reserve_mutex
);
1323 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1325 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1331 if (type
!= TTM_PL_SYSTEM
) {
1332 ret
= (*man
->func
->init
)(man
, p_size
);
1336 man
->has_type
= true;
1337 man
->use_type
= true;
1340 INIT_LIST_HEAD(&man
->lru
);
1344 EXPORT_SYMBOL(ttm_bo_init_mm
);
1346 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1348 struct ttm_bo_global
*glob
=
1349 container_of(kobj
, struct ttm_bo_global
, kobj
);
1351 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1352 __free_page(glob
->dummy_read_page
);
1356 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1358 struct ttm_bo_global
*glob
= ref
->object
;
1360 kobject_del(&glob
->kobj
);
1361 kobject_put(&glob
->kobj
);
1363 EXPORT_SYMBOL(ttm_bo_global_release
);
1365 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1367 struct ttm_bo_global_ref
*bo_ref
=
1368 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1369 struct ttm_bo_global
*glob
= ref
->object
;
1372 mutex_init(&glob
->device_list_mutex
);
1373 spin_lock_init(&glob
->lru_lock
);
1374 glob
->mem_glob
= bo_ref
->mem_glob
;
1375 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1377 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1382 INIT_LIST_HEAD(&glob
->swap_lru
);
1383 INIT_LIST_HEAD(&glob
->device_list
);
1385 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1386 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1387 if (unlikely(ret
!= 0)) {
1388 pr_err("Could not register buffer object swapout\n");
1392 atomic_set(&glob
->bo_count
, 0);
1394 ret
= kobject_init_and_add(
1395 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1396 if (unlikely(ret
!= 0))
1397 kobject_put(&glob
->kobj
);
1400 __free_page(glob
->dummy_read_page
);
1405 EXPORT_SYMBOL(ttm_bo_global_init
);
1408 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1411 unsigned i
= TTM_NUM_MEM_TYPES
;
1412 struct ttm_mem_type_manager
*man
;
1413 struct ttm_bo_global
*glob
= bdev
->glob
;
1416 man
= &bdev
->man
[i
];
1417 if (man
->has_type
) {
1418 man
->use_type
= false;
1419 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1421 pr_err("DRM memory manager type %d is not clean\n",
1424 man
->has_type
= false;
1428 mutex_lock(&glob
->device_list_mutex
);
1429 list_del(&bdev
->device_list
);
1430 mutex_unlock(&glob
->device_list_mutex
);
1432 cancel_delayed_work_sync(&bdev
->wq
);
1434 while (ttm_bo_delayed_delete(bdev
, true))
1437 spin_lock(&glob
->lru_lock
);
1438 if (list_empty(&bdev
->ddestroy
))
1439 TTM_DEBUG("Delayed destroy list was clean\n");
1441 if (list_empty(&bdev
->man
[0].lru
))
1442 TTM_DEBUG("Swap list was clean\n");
1443 spin_unlock(&glob
->lru_lock
);
1445 drm_vma_offset_manager_destroy(&bdev
->vma_manager
);
1449 EXPORT_SYMBOL(ttm_bo_device_release
);
1451 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1452 struct ttm_bo_global
*glob
,
1453 struct ttm_bo_driver
*driver
,
1454 struct address_space
*mapping
,
1455 uint64_t file_page_offset
,
1460 bdev
->driver
= driver
;
1462 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1465 * Initialize the system memory buffer type.
1466 * Other types need to be driver / IOCTL initialized.
1468 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1469 if (unlikely(ret
!= 0))
1472 drm_vma_offset_manager_init(&bdev
->vma_manager
, file_page_offset
,
1474 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1475 INIT_LIST_HEAD(&bdev
->ddestroy
);
1476 bdev
->dev_mapping
= mapping
;
1478 bdev
->need_dma32
= need_dma32
;
1480 spin_lock_init(&bdev
->fence_lock
);
1481 mutex_lock(&glob
->device_list_mutex
);
1482 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1483 mutex_unlock(&glob
->device_list_mutex
);
1489 EXPORT_SYMBOL(ttm_bo_device_init
);
1492 * buffer object vm functions.
1495 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1497 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1499 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1500 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1503 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1506 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1512 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1514 struct ttm_bo_device
*bdev
= bo
->bdev
;
1516 drm_vma_node_unmap(&bo
->vma_node
, bdev
->dev_mapping
);
1517 ttm_mem_io_free_vm(bo
);
1520 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1522 struct ttm_bo_device
*bdev
= bo
->bdev
;
1523 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1525 ttm_mem_io_lock(man
, false);
1526 ttm_bo_unmap_virtual_locked(bo
);
1527 ttm_mem_io_unlock(man
);
1531 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1534 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1535 bool lazy
, bool interruptible
, bool no_wait
)
1537 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1538 struct ttm_bo_device
*bdev
= bo
->bdev
;
1542 if (likely(bo
->sync_obj
== NULL
))
1545 while (bo
->sync_obj
) {
1547 if (driver
->sync_obj_signaled(bo
->sync_obj
)) {
1548 void *tmp_obj
= bo
->sync_obj
;
1549 bo
->sync_obj
= NULL
;
1550 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1551 spin_unlock(&bdev
->fence_lock
);
1552 driver
->sync_obj_unref(&tmp_obj
);
1553 spin_lock(&bdev
->fence_lock
);
1560 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1561 spin_unlock(&bdev
->fence_lock
);
1562 ret
= driver
->sync_obj_wait(sync_obj
,
1563 lazy
, interruptible
);
1564 if (unlikely(ret
!= 0)) {
1565 driver
->sync_obj_unref(&sync_obj
);
1566 spin_lock(&bdev
->fence_lock
);
1569 spin_lock(&bdev
->fence_lock
);
1570 if (likely(bo
->sync_obj
== sync_obj
)) {
1571 void *tmp_obj
= bo
->sync_obj
;
1572 bo
->sync_obj
= NULL
;
1573 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1575 spin_unlock(&bdev
->fence_lock
);
1576 driver
->sync_obj_unref(&sync_obj
);
1577 driver
->sync_obj_unref(&tmp_obj
);
1578 spin_lock(&bdev
->fence_lock
);
1580 spin_unlock(&bdev
->fence_lock
);
1581 driver
->sync_obj_unref(&sync_obj
);
1582 spin_lock(&bdev
->fence_lock
);
1587 EXPORT_SYMBOL(ttm_bo_wait
);
1589 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1591 struct ttm_bo_device
*bdev
= bo
->bdev
;
1595 * Using ttm_bo_reserve makes sure the lru lists are updated.
1598 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1599 if (unlikely(ret
!= 0))
1601 spin_lock(&bdev
->fence_lock
);
1602 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1603 spin_unlock(&bdev
->fence_lock
);
1604 if (likely(ret
== 0))
1605 atomic_inc(&bo
->cpu_writers
);
1606 ttm_bo_unreserve(bo
);
1609 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1611 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1613 atomic_dec(&bo
->cpu_writers
);
1615 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1618 * A buffer object shrink method that tries to swap out the first
1619 * buffer object on the bo_global::swap_lru list.
1622 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1624 struct ttm_bo_global
*glob
=
1625 container_of(shrink
, struct ttm_bo_global
, shrink
);
1626 struct ttm_buffer_object
*bo
;
1629 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1631 spin_lock(&glob
->lru_lock
);
1632 list_for_each_entry(bo
, &glob
->swap_lru
, swap
) {
1633 ret
= __ttm_bo_reserve(bo
, false, true, false, 0);
1639 spin_unlock(&glob
->lru_lock
);
1643 kref_get(&bo
->list_kref
);
1645 if (!list_empty(&bo
->ddestroy
)) {
1646 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, false, false);
1647 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1651 put_count
= ttm_bo_del_from_lru(bo
);
1652 spin_unlock(&glob
->lru_lock
);
1654 ttm_bo_list_ref_sub(bo
, put_count
, true);
1657 * Wait for GPU, then move to system cached.
1660 spin_lock(&bo
->bdev
->fence_lock
);
1661 ret
= ttm_bo_wait(bo
, false, false, false);
1662 spin_unlock(&bo
->bdev
->fence_lock
);
1664 if (unlikely(ret
!= 0))
1667 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1668 struct ttm_mem_reg evict_mem
;
1670 evict_mem
= bo
->mem
;
1671 evict_mem
.mm_node
= NULL
;
1672 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1673 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1675 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1677 if (unlikely(ret
!= 0))
1681 ttm_bo_unmap_virtual(bo
);
1684 * Swap out. Buffer will be swapped in again as soon as
1685 * anyone tries to access a ttm page.
1688 if (bo
->bdev
->driver
->swap_notify
)
1689 bo
->bdev
->driver
->swap_notify(bo
);
1691 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1696 * Unreserve without putting on LRU to avoid swapping out an
1697 * already swapped buffer.
1700 __ttm_bo_unreserve(bo
);
1701 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1705 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1707 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1710 EXPORT_SYMBOL(ttm_bo_swapout_all
);
1713 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1716 * @bo: Pointer to buffer
1718 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
)
1723 * In the absense of a wait_unlocked API,
1724 * Use the bo::wu_mutex to avoid triggering livelocks due to
1725 * concurrent use of this function. Note that this use of
1726 * bo::wu_mutex can go away if we change locking order to
1727 * mmap_sem -> bo::reserve.
1729 ret
= mutex_lock_interruptible(&bo
->wu_mutex
);
1730 if (unlikely(ret
!= 0))
1731 return -ERESTARTSYS
;
1732 if (!ww_mutex_is_locked(&bo
->resv
->lock
))
1734 ret
= __ttm_bo_reserve(bo
, true, false, false, NULL
);
1735 if (unlikely(ret
!= 0))
1737 __ttm_bo_unreserve(bo
);
1740 mutex_unlock(&bo
->wu_mutex
);