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>
43 #include <linux/reservation.h>
45 #define TTM_ASSERT_LOCKED(param)
46 #define TTM_DEBUG(fmt, arg...)
47 #define TTM_BO_HASH_ORDER 13
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_place(const struct ttm_place
*place
,
62 for (i
= 0; i
<= TTM_PL_PRIV5
; i
++)
63 if (place
->flags
& (1 << i
)) {
70 static void ttm_mem_type_debug(struct ttm_bo_device
*bdev
, int mem_type
)
72 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
74 pr_err(" has_type: %d\n", man
->has_type
);
75 pr_err(" use_type: %d\n", man
->use_type
);
76 pr_err(" flags: 0x%08X\n", man
->flags
);
77 pr_err(" gpu_offset: 0x%08llX\n", man
->gpu_offset
);
78 pr_err(" size: %llu\n", man
->size
);
79 pr_err(" available_caching: 0x%08X\n", man
->available_caching
);
80 pr_err(" default_caching: 0x%08X\n", man
->default_caching
);
81 if (mem_type
!= TTM_PL_SYSTEM
)
82 (*man
->func
->debug
)(man
, TTM_PFX
);
85 static void ttm_bo_mem_space_debug(struct ttm_buffer_object
*bo
,
86 struct ttm_placement
*placement
)
90 pr_err("No space for %p (%lu pages, %luK, %luM)\n",
91 bo
, bo
->mem
.num_pages
, bo
->mem
.size
>> 10,
93 for (i
= 0; i
< placement
->num_placement
; i
++) {
94 ret
= ttm_mem_type_from_place(&placement
->placement
[i
],
98 pr_err(" placement[%d]=0x%08X (%d)\n",
99 i
, placement
->placement
[i
].flags
, mem_type
);
100 ttm_mem_type_debug(bo
->bdev
, mem_type
);
104 static ssize_t
ttm_bo_global_show(struct kobject
*kobj
,
105 struct attribute
*attr
,
108 struct ttm_bo_global
*glob
=
109 container_of(kobj
, struct ttm_bo_global
, kobj
);
111 return snprintf(buffer
, PAGE_SIZE
, "%lu\n",
112 (unsigned long) atomic_read(&glob
->bo_count
));
115 static struct attribute
*ttm_bo_global_attrs
[] = {
120 static const struct sysfs_ops ttm_bo_global_ops
= {
121 .show
= &ttm_bo_global_show
124 static struct kobj_type ttm_bo_glob_kobj_type
= {
125 .release
= &ttm_bo_global_kobj_release
,
126 .sysfs_ops
= &ttm_bo_global_ops
,
127 .default_attrs
= ttm_bo_global_attrs
131 static inline uint32_t ttm_bo_type_flags(unsigned type
)
136 static void ttm_bo_release_list(struct kref
*list_kref
)
138 struct ttm_buffer_object
*bo
=
139 container_of(list_kref
, struct ttm_buffer_object
, list_kref
);
140 struct ttm_bo_device
*bdev
= bo
->bdev
;
141 size_t acc_size
= bo
->acc_size
;
143 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
144 BUG_ON(atomic_read(&bo
->kref
.refcount
));
145 BUG_ON(atomic_read(&bo
->cpu_writers
));
146 BUG_ON(bo
->mem
.mm_node
!= NULL
);
147 BUG_ON(!list_empty(&bo
->lru
));
148 BUG_ON(!list_empty(&bo
->ddestroy
));
149 ttm_tt_destroy(bo
->ttm
);
150 atomic_dec(&bo
->glob
->bo_count
);
151 fence_put(bo
->moving
);
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
;
167 lockdep_assert_held(&bo
->resv
->lock
.base
);
169 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
171 BUG_ON(!list_empty(&bo
->lru
));
173 list_add(&bo
->lru
, bdev
->driver
->lru_tail(bo
));
174 kref_get(&bo
->list_kref
);
176 if (bo
->ttm
&& !(bo
->ttm
->page_flags
& TTM_PAGE_FLAG_SG
)) {
177 list_add(&bo
->swap
, bdev
->driver
->swap_lru_tail(bo
));
178 kref_get(&bo
->list_kref
);
182 EXPORT_SYMBOL(ttm_bo_add_to_lru
);
184 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
186 struct ttm_bo_device
*bdev
= bo
->bdev
;
189 if (bdev
->driver
->lru_removal
)
190 bdev
->driver
->lru_removal(bo
);
192 if (!list_empty(&bo
->swap
)) {
193 list_del_init(&bo
->swap
);
196 if (!list_empty(&bo
->lru
)) {
197 list_del_init(&bo
->lru
);
204 static void ttm_bo_ref_bug(struct kref
*list_kref
)
209 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
212 kref_sub(&bo
->list_kref
, count
,
213 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
216 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object
*bo
)
220 spin_lock(&bo
->glob
->lru_lock
);
221 put_count
= ttm_bo_del_from_lru(bo
);
222 spin_unlock(&bo
->glob
->lru_lock
);
223 ttm_bo_list_ref_sub(bo
, put_count
, true);
225 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru
);
227 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object
*bo
)
229 struct ttm_bo_device
*bdev
= bo
->bdev
;
232 lockdep_assert_held(&bo
->resv
->lock
.base
);
234 if (bdev
->driver
->lru_removal
)
235 bdev
->driver
->lru_removal(bo
);
237 put_count
= ttm_bo_del_from_lru(bo
);
238 ttm_bo_list_ref_sub(bo
, put_count
, true);
239 ttm_bo_add_to_lru(bo
);
241 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail
);
243 struct list_head
*ttm_bo_default_lru_tail(struct ttm_buffer_object
*bo
)
245 return bo
->bdev
->man
[bo
->mem
.mem_type
].lru
.prev
;
247 EXPORT_SYMBOL(ttm_bo_default_lru_tail
);
249 struct list_head
*ttm_bo_default_swap_lru_tail(struct ttm_buffer_object
*bo
)
251 return bo
->glob
->swap_lru
.prev
;
253 EXPORT_SYMBOL(ttm_bo_default_swap_lru_tail
);
256 * Call bo->mutex locked.
258 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
260 struct ttm_bo_device
*bdev
= bo
->bdev
;
261 struct ttm_bo_global
*glob
= bo
->glob
;
263 uint32_t page_flags
= 0;
265 TTM_ASSERT_LOCKED(&bo
->mutex
);
268 if (bdev
->need_dma32
)
269 page_flags
|= TTM_PAGE_FLAG_DMA32
;
272 case ttm_bo_type_device
:
274 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
275 case ttm_bo_type_kernel
:
276 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
277 page_flags
, glob
->dummy_read_page
);
278 if (unlikely(bo
->ttm
== NULL
))
282 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
283 page_flags
| TTM_PAGE_FLAG_SG
,
284 glob
->dummy_read_page
);
285 if (unlikely(bo
->ttm
== NULL
)) {
289 bo
->ttm
->sg
= bo
->sg
;
292 pr_err("Illegal buffer object type\n");
300 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
301 struct ttm_mem_reg
*mem
,
302 bool evict
, bool interruptible
,
305 struct ttm_bo_device
*bdev
= bo
->bdev
;
306 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
307 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
308 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
309 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
312 if (old_is_pci
|| new_is_pci
||
313 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
314 ret
= ttm_mem_io_lock(old_man
, true);
315 if (unlikely(ret
!= 0))
317 ttm_bo_unmap_virtual_locked(bo
);
318 ttm_mem_io_unlock(old_man
);
322 * Create and bind a ttm if required.
325 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
326 if (bo
->ttm
== NULL
) {
327 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
328 ret
= ttm_bo_add_ttm(bo
, zero
);
333 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
337 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
338 ret
= ttm_tt_bind(bo
->ttm
, mem
);
343 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
344 if (bdev
->driver
->move_notify
)
345 bdev
->driver
->move_notify(bo
, mem
);
352 if (bdev
->driver
->move_notify
)
353 bdev
->driver
->move_notify(bo
, mem
);
355 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
356 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
357 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_gpu
, mem
);
358 else if (bdev
->driver
->move
)
359 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
362 ret
= ttm_bo_move_memcpy(bo
, evict
, interruptible
,
366 if (bdev
->driver
->move_notify
) {
367 struct ttm_mem_reg tmp_mem
= *mem
;
370 bdev
->driver
->move_notify(bo
, mem
);
380 if (bdev
->driver
->invalidate_caches
) {
381 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
383 pr_err("Can not flush read caches\n");
388 if (bo
->mem
.mm_node
) {
389 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
390 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
391 bo
->cur_placement
= bo
->mem
.placement
;
398 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
399 if (new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) {
400 ttm_tt_destroy(bo
->ttm
);
409 * Will release GPU memory type usage on destruction.
410 * This is the place to put in driver specific hooks to release
411 * driver private resources.
412 * Will release the bo::reserved lock.
415 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
417 if (bo
->bdev
->driver
->move_notify
)
418 bo
->bdev
->driver
->move_notify(bo
, NULL
);
420 ttm_tt_destroy(bo
->ttm
);
422 ttm_bo_mem_put(bo
, &bo
->mem
);
424 ww_mutex_unlock (&bo
->resv
->lock
);
427 static void ttm_bo_flush_all_fences(struct ttm_buffer_object
*bo
)
429 struct reservation_object_list
*fobj
;
433 fobj
= reservation_object_get_list(bo
->resv
);
434 fence
= reservation_object_get_excl(bo
->resv
);
435 if (fence
&& !fence
->ops
->signaled
)
436 fence_enable_sw_signaling(fence
);
438 for (i
= 0; fobj
&& i
< fobj
->shared_count
; ++i
) {
439 fence
= rcu_dereference_protected(fobj
->shared
[i
],
440 reservation_object_held(bo
->resv
));
442 if (!fence
->ops
->signaled
)
443 fence_enable_sw_signaling(fence
);
447 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
449 struct ttm_bo_device
*bdev
= bo
->bdev
;
450 struct ttm_bo_global
*glob
= bo
->glob
;
454 spin_lock(&glob
->lru_lock
);
455 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
458 if (!ttm_bo_wait(bo
, false, true)) {
459 put_count
= ttm_bo_del_from_lru(bo
);
461 spin_unlock(&glob
->lru_lock
);
462 ttm_bo_cleanup_memtype_use(bo
);
464 ttm_bo_list_ref_sub(bo
, put_count
, true);
468 ttm_bo_flush_all_fences(bo
);
471 * Make NO_EVICT bos immediately available to
472 * shrinkers, now that they are queued for
475 if (bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
) {
476 bo
->mem
.placement
&= ~TTM_PL_FLAG_NO_EVICT
;
477 ttm_bo_add_to_lru(bo
);
480 __ttm_bo_unreserve(bo
);
483 kref_get(&bo
->list_kref
);
484 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
485 spin_unlock(&glob
->lru_lock
);
487 schedule_delayed_work(&bdev
->wq
,
488 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
492 * function ttm_bo_cleanup_refs_and_unlock
493 * If bo idle, remove from delayed- and lru lists, and unref.
494 * If not idle, do nothing.
496 * Must be called with lru_lock and reservation held, this function
497 * will drop both before returning.
499 * @interruptible Any sleeps should occur interruptibly.
500 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
503 static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object
*bo
,
507 struct ttm_bo_global
*glob
= bo
->glob
;
511 ret
= ttm_bo_wait(bo
, false, true);
513 if (ret
&& !no_wait_gpu
) {
515 ww_mutex_unlock(&bo
->resv
->lock
);
516 spin_unlock(&glob
->lru_lock
);
518 lret
= reservation_object_wait_timeout_rcu(bo
->resv
,
528 spin_lock(&glob
->lru_lock
);
529 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
532 * We raced, and lost, someone else holds the reservation now,
533 * and is probably busy in ttm_bo_cleanup_memtype_use.
535 * Even if it's not the case, because we finished waiting any
536 * delayed destruction would succeed, so just return success
540 spin_unlock(&glob
->lru_lock
);
545 * remove sync_obj with ttm_bo_wait, the wait should be
546 * finished, and no new wait object should have been added.
548 ret
= ttm_bo_wait(bo
, false, true);
552 if (ret
|| unlikely(list_empty(&bo
->ddestroy
))) {
553 __ttm_bo_unreserve(bo
);
554 spin_unlock(&glob
->lru_lock
);
558 put_count
= ttm_bo_del_from_lru(bo
);
559 list_del_init(&bo
->ddestroy
);
562 spin_unlock(&glob
->lru_lock
);
563 ttm_bo_cleanup_memtype_use(bo
);
565 ttm_bo_list_ref_sub(bo
, put_count
, true);
571 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
572 * encountered buffers.
575 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
577 struct ttm_bo_global
*glob
= bdev
->glob
;
578 struct ttm_buffer_object
*entry
= NULL
;
581 spin_lock(&glob
->lru_lock
);
582 if (list_empty(&bdev
->ddestroy
))
585 entry
= list_first_entry(&bdev
->ddestroy
,
586 struct ttm_buffer_object
, ddestroy
);
587 kref_get(&entry
->list_kref
);
590 struct ttm_buffer_object
*nentry
= NULL
;
592 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
593 nentry
= list_first_entry(&entry
->ddestroy
,
594 struct ttm_buffer_object
, ddestroy
);
595 kref_get(&nentry
->list_kref
);
598 ret
= __ttm_bo_reserve(entry
, false, true, NULL
);
599 if (remove_all
&& ret
) {
600 spin_unlock(&glob
->lru_lock
);
601 ret
= __ttm_bo_reserve(entry
, false, false, NULL
);
602 spin_lock(&glob
->lru_lock
);
606 ret
= ttm_bo_cleanup_refs_and_unlock(entry
, false,
609 spin_unlock(&glob
->lru_lock
);
611 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
617 spin_lock(&glob
->lru_lock
);
618 if (list_empty(&entry
->ddestroy
))
623 spin_unlock(&glob
->lru_lock
);
626 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
630 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
632 struct ttm_bo_device
*bdev
=
633 container_of(work
, struct ttm_bo_device
, wq
.work
);
635 if (ttm_bo_delayed_delete(bdev
, false)) {
636 schedule_delayed_work(&bdev
->wq
,
637 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
641 static void ttm_bo_release(struct kref
*kref
)
643 struct ttm_buffer_object
*bo
=
644 container_of(kref
, struct ttm_buffer_object
, kref
);
645 struct ttm_bo_device
*bdev
= bo
->bdev
;
646 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
648 drm_vma_offset_remove(&bdev
->vma_manager
, &bo
->vma_node
);
649 ttm_mem_io_lock(man
, false);
650 ttm_mem_io_free_vm(bo
);
651 ttm_mem_io_unlock(man
);
652 ttm_bo_cleanup_refs_or_queue(bo
);
653 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
656 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
658 struct ttm_buffer_object
*bo
= *p_bo
;
661 kref_put(&bo
->kref
, ttm_bo_release
);
663 EXPORT_SYMBOL(ttm_bo_unref
);
665 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
667 return cancel_delayed_work_sync(&bdev
->wq
);
669 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
671 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
674 schedule_delayed_work(&bdev
->wq
,
675 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
677 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
679 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
682 struct ttm_bo_device
*bdev
= bo
->bdev
;
683 struct ttm_mem_reg evict_mem
;
684 struct ttm_placement placement
;
687 lockdep_assert_held(&bo
->resv
->lock
.base
);
690 evict_mem
.mm_node
= NULL
;
691 evict_mem
.bus
.io_reserved_vm
= false;
692 evict_mem
.bus
.io_reserved_count
= 0;
694 placement
.num_placement
= 0;
695 placement
.num_busy_placement
= 0;
696 bdev
->driver
->evict_flags(bo
, &placement
);
697 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
700 if (ret
!= -ERESTARTSYS
) {
701 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
703 ttm_bo_mem_space_debug(bo
, &placement
);
708 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
711 if (ret
!= -ERESTARTSYS
)
712 pr_err("Buffer eviction failed\n");
713 ttm_bo_mem_put(bo
, &evict_mem
);
721 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
723 const struct ttm_place
*place
,
727 struct ttm_bo_global
*glob
= bdev
->glob
;
728 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
729 struct ttm_buffer_object
*bo
;
730 int ret
= -EBUSY
, put_count
;
732 spin_lock(&glob
->lru_lock
);
733 list_for_each_entry(bo
, &man
->lru
, lru
) {
734 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
736 if (place
&& (place
->fpfn
|| place
->lpfn
)) {
737 /* Don't evict this BO if it's outside of the
738 * requested placement range
740 if (place
->fpfn
>= (bo
->mem
.start
+ bo
->mem
.size
) ||
741 (place
->lpfn
&& place
->lpfn
<= bo
->mem
.start
)) {
742 __ttm_bo_unreserve(bo
);
753 spin_unlock(&glob
->lru_lock
);
757 kref_get(&bo
->list_kref
);
759 if (!list_empty(&bo
->ddestroy
)) {
760 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, interruptible
,
762 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
766 put_count
= ttm_bo_del_from_lru(bo
);
767 spin_unlock(&glob
->lru_lock
);
771 ttm_bo_list_ref_sub(bo
, put_count
, true);
773 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_gpu
);
774 ttm_bo_unreserve(bo
);
776 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
780 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
782 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
785 (*man
->func
->put_node
)(man
, mem
);
787 EXPORT_SYMBOL(ttm_bo_mem_put
);
790 * Add the last move fence to the BO and reserve a new shared slot.
792 static int ttm_bo_add_move_fence(struct ttm_buffer_object
*bo
,
793 struct ttm_mem_type_manager
*man
,
794 struct ttm_mem_reg
*mem
)
799 spin_lock(&man
->move_lock
);
800 fence
= fence_get(man
->move
);
801 spin_unlock(&man
->move_lock
);
804 reservation_object_add_shared_fence(bo
->resv
, fence
);
806 ret
= reservation_object_reserve_shared(bo
->resv
);
810 fence_put(bo
->moving
);
818 * Repeatedly evict memory from the LRU for @mem_type until we create enough
819 * space, or we've evicted everything and there isn't enough space.
821 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
823 const struct ttm_place
*place
,
824 struct ttm_mem_reg
*mem
,
828 struct ttm_bo_device
*bdev
= bo
->bdev
;
829 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
833 ret
= (*man
->func
->get_node
)(man
, bo
, place
, mem
);
834 if (unlikely(ret
!= 0))
838 ret
= ttm_mem_evict_first(bdev
, mem_type
, place
,
839 interruptible
, no_wait_gpu
);
840 if (unlikely(ret
!= 0))
843 mem
->mem_type
= mem_type
;
844 return ttm_bo_add_move_fence(bo
, man
, mem
);
847 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
848 uint32_t cur_placement
,
849 uint32_t proposed_placement
)
851 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
852 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
855 * Keep current caching if possible.
858 if ((cur_placement
& caching
) != 0)
859 result
|= (cur_placement
& caching
);
860 else if ((man
->default_caching
& caching
) != 0)
861 result
|= man
->default_caching
;
862 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
863 result
|= TTM_PL_FLAG_CACHED
;
864 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
865 result
|= TTM_PL_FLAG_WC
;
866 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
867 result
|= TTM_PL_FLAG_UNCACHED
;
872 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
874 const struct ttm_place
*place
,
875 uint32_t *masked_placement
)
877 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
879 if ((cur_flags
& place
->flags
& TTM_PL_MASK_MEM
) == 0)
882 if ((place
->flags
& man
->available_caching
) == 0)
885 cur_flags
|= (place
->flags
& man
->available_caching
);
887 *masked_placement
= cur_flags
;
892 * Creates space for memory region @mem according to its type.
894 * This function first searches for free space in compatible memory types in
895 * the priority order defined by the driver. If free space isn't found, then
896 * ttm_bo_mem_force_space is attempted in priority order to evict and find
899 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
900 struct ttm_placement
*placement
,
901 struct ttm_mem_reg
*mem
,
905 struct ttm_bo_device
*bdev
= bo
->bdev
;
906 struct ttm_mem_type_manager
*man
;
907 uint32_t mem_type
= TTM_PL_SYSTEM
;
908 uint32_t cur_flags
= 0;
909 bool type_found
= false;
910 bool type_ok
= false;
911 bool has_erestartsys
= false;
914 ret
= reservation_object_reserve_shared(bo
->resv
);
919 for (i
= 0; i
< placement
->num_placement
; ++i
) {
920 const struct ttm_place
*place
= &placement
->placement
[i
];
922 ret
= ttm_mem_type_from_place(place
, &mem_type
);
925 man
= &bdev
->man
[mem_type
];
926 if (!man
->has_type
|| !man
->use_type
)
929 type_ok
= ttm_bo_mt_compatible(man
, mem_type
, place
,
936 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
939 * Use the access and other non-mapping-related flag bits from
940 * the memory placement flags to the current flags
942 ttm_flag_masked(&cur_flags
, place
->flags
,
943 ~TTM_PL_MASK_MEMTYPE
);
945 if (mem_type
== TTM_PL_SYSTEM
)
948 ret
= (*man
->func
->get_node
)(man
, bo
, place
, mem
);
953 ret
= ttm_bo_add_move_fence(bo
, man
, mem
);
955 (*man
->func
->put_node
)(man
, mem
);
962 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
963 mem
->mem_type
= mem_type
;
964 mem
->placement
= cur_flags
;
968 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
969 const struct ttm_place
*place
= &placement
->busy_placement
[i
];
971 ret
= ttm_mem_type_from_place(place
, &mem_type
);
974 man
= &bdev
->man
[mem_type
];
975 if (!man
->has_type
|| !man
->use_type
)
977 if (!ttm_bo_mt_compatible(man
, mem_type
, place
, &cur_flags
))
981 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
984 * Use the access and other non-mapping-related flag bits from
985 * the memory placement flags to the current flags
987 ttm_flag_masked(&cur_flags
, place
->flags
,
988 ~TTM_PL_MASK_MEMTYPE
);
990 if (mem_type
== TTM_PL_SYSTEM
) {
991 mem
->mem_type
= mem_type
;
992 mem
->placement
= cur_flags
;
997 ret
= ttm_bo_mem_force_space(bo
, mem_type
, place
, mem
,
998 interruptible
, no_wait_gpu
);
999 if (ret
== 0 && mem
->mm_node
) {
1000 mem
->placement
= cur_flags
;
1003 if (ret
== -ERESTARTSYS
)
1004 has_erestartsys
= true;
1008 printk(KERN_ERR TTM_PFX
"No compatible memory type found.\n");
1012 return (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
1014 EXPORT_SYMBOL(ttm_bo_mem_space
);
1016 static int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
1017 struct ttm_placement
*placement
,
1022 struct ttm_mem_reg mem
;
1024 lockdep_assert_held(&bo
->resv
->lock
.base
);
1026 mem
.num_pages
= bo
->num_pages
;
1027 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1028 mem
.page_alignment
= bo
->mem
.page_alignment
;
1029 mem
.bus
.io_reserved_vm
= false;
1030 mem
.bus
.io_reserved_count
= 0;
1032 * Determine where to move the buffer.
1034 ret
= ttm_bo_mem_space(bo
, placement
, &mem
,
1035 interruptible
, no_wait_gpu
);
1038 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false,
1039 interruptible
, no_wait_gpu
);
1041 if (ret
&& mem
.mm_node
)
1042 ttm_bo_mem_put(bo
, &mem
);
1046 bool ttm_bo_mem_compat(struct ttm_placement
*placement
,
1047 struct ttm_mem_reg
*mem
,
1048 uint32_t *new_flags
)
1052 for (i
= 0; i
< placement
->num_placement
; i
++) {
1053 const struct ttm_place
*heap
= &placement
->placement
[i
];
1055 (mem
->start
< heap
->fpfn
||
1056 (heap
->lpfn
!= 0 && (mem
->start
+ mem
->num_pages
) > heap
->lpfn
)))
1059 *new_flags
= heap
->flags
;
1060 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1061 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1065 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1066 const struct ttm_place
*heap
= &placement
->busy_placement
[i
];
1068 (mem
->start
< heap
->fpfn
||
1069 (heap
->lpfn
!= 0 && (mem
->start
+ mem
->num_pages
) > heap
->lpfn
)))
1072 *new_flags
= heap
->flags
;
1073 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1074 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1080 EXPORT_SYMBOL(ttm_bo_mem_compat
);
1082 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1083 struct ttm_placement
*placement
,
1090 lockdep_assert_held(&bo
->resv
->lock
.base
);
1092 * Check whether we need to move buffer.
1094 if (!ttm_bo_mem_compat(placement
, &bo
->mem
, &new_flags
)) {
1095 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
,
1101 * Use the access and other non-mapping-related flag bits from
1102 * the compatible memory placement flags to the active flags
1104 ttm_flag_masked(&bo
->mem
.placement
, new_flags
,
1105 ~TTM_PL_MASK_MEMTYPE
);
1108 * We might need to add a TTM.
1110 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1111 ret
= ttm_bo_add_ttm(bo
, true);
1117 EXPORT_SYMBOL(ttm_bo_validate
);
1119 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1120 struct ttm_buffer_object
*bo
,
1122 enum ttm_bo_type type
,
1123 struct ttm_placement
*placement
,
1124 uint32_t page_alignment
,
1126 struct file
*persistent_swap_storage
,
1128 struct sg_table
*sg
,
1129 struct reservation_object
*resv
,
1130 void (*destroy
) (struct ttm_buffer_object
*))
1133 unsigned long num_pages
;
1134 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1137 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1139 pr_err("Out of kernel memory\n");
1147 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1148 if (num_pages
== 0) {
1149 pr_err("Illegal buffer object size\n");
1154 ttm_mem_global_free(mem_glob
, acc_size
);
1157 bo
->destroy
= destroy
;
1159 kref_init(&bo
->kref
);
1160 kref_init(&bo
->list_kref
);
1161 atomic_set(&bo
->cpu_writers
, 0);
1162 INIT_LIST_HEAD(&bo
->lru
);
1163 INIT_LIST_HEAD(&bo
->ddestroy
);
1164 INIT_LIST_HEAD(&bo
->swap
);
1165 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1166 mutex_init(&bo
->wu_mutex
);
1168 bo
->glob
= bdev
->glob
;
1170 bo
->num_pages
= num_pages
;
1171 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1172 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1173 bo
->mem
.num_pages
= bo
->num_pages
;
1174 bo
->mem
.mm_node
= NULL
;
1175 bo
->mem
.page_alignment
= page_alignment
;
1176 bo
->mem
.bus
.io_reserved_vm
= false;
1177 bo
->mem
.bus
.io_reserved_count
= 0;
1179 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1180 bo
->persistent_swap_storage
= persistent_swap_storage
;
1181 bo
->acc_size
= acc_size
;
1185 lockdep_assert_held(&bo
->resv
->lock
.base
);
1187 bo
->resv
= &bo
->ttm_resv
;
1188 reservation_object_init(&bo
->ttm_resv
);
1190 atomic_inc(&bo
->glob
->bo_count
);
1191 drm_vma_node_reset(&bo
->vma_node
);
1194 * For ttm_bo_type_device buffers, allocate
1195 * address space from the device.
1197 if (bo
->type
== ttm_bo_type_device
||
1198 bo
->type
== ttm_bo_type_sg
)
1199 ret
= drm_vma_offset_add(&bdev
->vma_manager
, &bo
->vma_node
,
1202 /* passed reservation objects should already be locked,
1203 * since otherwise lockdep will be angered in radeon.
1206 locked
= ww_mutex_trylock(&bo
->resv
->lock
);
1211 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1214 ttm_bo_unreserve(bo
);
1216 } else if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
1217 spin_lock(&bo
->glob
->lru_lock
);
1218 ttm_bo_add_to_lru(bo
);
1219 spin_unlock(&bo
->glob
->lru_lock
);
1227 EXPORT_SYMBOL(ttm_bo_init
);
1229 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1230 unsigned long bo_size
,
1231 unsigned struct_size
)
1233 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1236 size
+= ttm_round_pot(struct_size
);
1237 size
+= ttm_round_pot(npages
* sizeof(void *));
1238 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1241 EXPORT_SYMBOL(ttm_bo_acc_size
);
1243 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1244 unsigned long bo_size
,
1245 unsigned struct_size
)
1247 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1250 size
+= ttm_round_pot(struct_size
);
1251 size
+= ttm_round_pot(npages
* (2*sizeof(void *) + sizeof(dma_addr_t
)));
1252 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1255 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1257 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1259 enum ttm_bo_type type
,
1260 struct ttm_placement
*placement
,
1261 uint32_t page_alignment
,
1263 struct file
*persistent_swap_storage
,
1264 struct ttm_buffer_object
**p_bo
)
1266 struct ttm_buffer_object
*bo
;
1270 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1271 if (unlikely(bo
== NULL
))
1274 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1275 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1276 interruptible
, persistent_swap_storage
, acc_size
,
1278 if (likely(ret
== 0))
1283 EXPORT_SYMBOL(ttm_bo_create
);
1285 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1286 unsigned mem_type
, bool allow_errors
)
1288 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1289 struct ttm_bo_global
*glob
= bdev
->glob
;
1290 struct fence
*fence
;
1294 * Can't use standard list traversal since we're unlocking.
1297 spin_lock(&glob
->lru_lock
);
1298 while (!list_empty(&man
->lru
)) {
1299 spin_unlock(&glob
->lru_lock
);
1300 ret
= ttm_mem_evict_first(bdev
, mem_type
, NULL
, false, false);
1305 pr_err("Cleanup eviction failed\n");
1308 spin_lock(&glob
->lru_lock
);
1310 spin_unlock(&glob
->lru_lock
);
1312 spin_lock(&man
->move_lock
);
1313 fence
= fence_get(man
->move
);
1314 spin_unlock(&man
->move_lock
);
1317 ret
= fence_wait(fence
, false);
1323 pr_err("Cleanup eviction failed\n");
1331 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1333 struct ttm_mem_type_manager
*man
;
1336 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1337 pr_err("Illegal memory type %d\n", mem_type
);
1340 man
= &bdev
->man
[mem_type
];
1342 if (!man
->has_type
) {
1343 pr_err("Trying to take down uninitialized memory manager type %u\n",
1347 fence_put(man
->move
);
1349 man
->use_type
= false;
1350 man
->has_type
= false;
1354 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1356 ret
= (*man
->func
->takedown
)(man
);
1361 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1363 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1365 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1367 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1368 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1372 if (!man
->has_type
) {
1373 pr_err("Memory type %u has not been initialized\n", mem_type
);
1377 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1379 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1381 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1382 unsigned long p_size
)
1385 struct ttm_mem_type_manager
*man
;
1387 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1388 man
= &bdev
->man
[type
];
1389 BUG_ON(man
->has_type
);
1390 man
->io_reserve_fastpath
= true;
1391 man
->use_io_reserve_lru
= false;
1392 mutex_init(&man
->io_reserve_mutex
);
1393 spin_lock_init(&man
->move_lock
);
1394 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1396 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1402 if (type
!= TTM_PL_SYSTEM
) {
1403 ret
= (*man
->func
->init
)(man
, p_size
);
1407 man
->has_type
= true;
1408 man
->use_type
= true;
1411 INIT_LIST_HEAD(&man
->lru
);
1416 EXPORT_SYMBOL(ttm_bo_init_mm
);
1418 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1420 struct ttm_bo_global
*glob
=
1421 container_of(kobj
, struct ttm_bo_global
, kobj
);
1423 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1424 __free_page(glob
->dummy_read_page
);
1428 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1430 struct ttm_bo_global
*glob
= ref
->object
;
1432 kobject_del(&glob
->kobj
);
1433 kobject_put(&glob
->kobj
);
1435 EXPORT_SYMBOL(ttm_bo_global_release
);
1437 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1439 struct ttm_bo_global_ref
*bo_ref
=
1440 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1441 struct ttm_bo_global
*glob
= ref
->object
;
1444 mutex_init(&glob
->device_list_mutex
);
1445 spin_lock_init(&glob
->lru_lock
);
1446 glob
->mem_glob
= bo_ref
->mem_glob
;
1447 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1449 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1454 INIT_LIST_HEAD(&glob
->swap_lru
);
1455 INIT_LIST_HEAD(&glob
->device_list
);
1457 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1458 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1459 if (unlikely(ret
!= 0)) {
1460 pr_err("Could not register buffer object swapout\n");
1464 atomic_set(&glob
->bo_count
, 0);
1466 ret
= kobject_init_and_add(
1467 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1468 if (unlikely(ret
!= 0))
1469 kobject_put(&glob
->kobj
);
1472 __free_page(glob
->dummy_read_page
);
1477 EXPORT_SYMBOL(ttm_bo_global_init
);
1480 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1483 unsigned i
= TTM_NUM_MEM_TYPES
;
1484 struct ttm_mem_type_manager
*man
;
1485 struct ttm_bo_global
*glob
= bdev
->glob
;
1488 man
= &bdev
->man
[i
];
1489 if (man
->has_type
) {
1490 man
->use_type
= false;
1491 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1493 pr_err("DRM memory manager type %d is not clean\n",
1496 man
->has_type
= false;
1500 mutex_lock(&glob
->device_list_mutex
);
1501 list_del(&bdev
->device_list
);
1502 mutex_unlock(&glob
->device_list_mutex
);
1504 cancel_delayed_work_sync(&bdev
->wq
);
1506 while (ttm_bo_delayed_delete(bdev
, true))
1509 spin_lock(&glob
->lru_lock
);
1510 if (list_empty(&bdev
->ddestroy
))
1511 TTM_DEBUG("Delayed destroy list was clean\n");
1513 if (list_empty(&bdev
->man
[0].lru
))
1514 TTM_DEBUG("Swap list was clean\n");
1515 spin_unlock(&glob
->lru_lock
);
1517 drm_vma_offset_manager_destroy(&bdev
->vma_manager
);
1521 EXPORT_SYMBOL(ttm_bo_device_release
);
1523 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1524 struct ttm_bo_global
*glob
,
1525 struct ttm_bo_driver
*driver
,
1526 struct address_space
*mapping
,
1527 uint64_t file_page_offset
,
1532 bdev
->driver
= driver
;
1534 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1537 * Initialize the system memory buffer type.
1538 * Other types need to be driver / IOCTL initialized.
1540 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1541 if (unlikely(ret
!= 0))
1544 drm_vma_offset_manager_init(&bdev
->vma_manager
, file_page_offset
,
1546 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1547 INIT_LIST_HEAD(&bdev
->ddestroy
);
1548 bdev
->dev_mapping
= mapping
;
1550 bdev
->need_dma32
= need_dma32
;
1551 mutex_lock(&glob
->device_list_mutex
);
1552 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1553 mutex_unlock(&glob
->device_list_mutex
);
1559 EXPORT_SYMBOL(ttm_bo_device_init
);
1562 * buffer object vm functions.
1565 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1567 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1569 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1570 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1573 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1576 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1582 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1584 struct ttm_bo_device
*bdev
= bo
->bdev
;
1586 drm_vma_node_unmap(&bo
->vma_node
, bdev
->dev_mapping
);
1587 ttm_mem_io_free_vm(bo
);
1590 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1592 struct ttm_bo_device
*bdev
= bo
->bdev
;
1593 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1595 ttm_mem_io_lock(man
, false);
1596 ttm_bo_unmap_virtual_locked(bo
);
1597 ttm_mem_io_unlock(man
);
1601 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1603 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1604 bool interruptible
, bool no_wait
)
1606 long timeout
= no_wait
? 0 : 15 * HZ
;
1608 timeout
= reservation_object_wait_timeout_rcu(bo
->resv
, true,
1609 interruptible
, timeout
);
1616 reservation_object_add_excl_fence(bo
->resv
, NULL
);
1619 EXPORT_SYMBOL(ttm_bo_wait
);
1621 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1626 * Using ttm_bo_reserve makes sure the lru lists are updated.
1629 ret
= ttm_bo_reserve(bo
, true, no_wait
, NULL
);
1630 if (unlikely(ret
!= 0))
1632 ret
= ttm_bo_wait(bo
, true, no_wait
);
1633 if (likely(ret
== 0))
1634 atomic_inc(&bo
->cpu_writers
);
1635 ttm_bo_unreserve(bo
);
1638 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1640 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1642 atomic_dec(&bo
->cpu_writers
);
1644 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1647 * A buffer object shrink method that tries to swap out the first
1648 * buffer object on the bo_global::swap_lru list.
1651 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1653 struct ttm_bo_global
*glob
=
1654 container_of(shrink
, struct ttm_bo_global
, shrink
);
1655 struct ttm_buffer_object
*bo
;
1658 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1660 spin_lock(&glob
->lru_lock
);
1661 list_for_each_entry(bo
, &glob
->swap_lru
, swap
) {
1662 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
1668 spin_unlock(&glob
->lru_lock
);
1672 kref_get(&bo
->list_kref
);
1674 if (!list_empty(&bo
->ddestroy
)) {
1675 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, false, false);
1676 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1680 put_count
= ttm_bo_del_from_lru(bo
);
1681 spin_unlock(&glob
->lru_lock
);
1683 ttm_bo_list_ref_sub(bo
, put_count
, true);
1686 * Move to system cached
1689 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1690 struct ttm_mem_reg evict_mem
;
1692 evict_mem
= bo
->mem
;
1693 evict_mem
.mm_node
= NULL
;
1694 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1695 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1697 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1699 if (unlikely(ret
!= 0))
1704 * Make sure BO is idle.
1707 ret
= ttm_bo_wait(bo
, false, false);
1708 if (unlikely(ret
!= 0))
1711 ttm_bo_unmap_virtual(bo
);
1714 * Swap out. Buffer will be swapped in again as soon as
1715 * anyone tries to access a ttm page.
1718 if (bo
->bdev
->driver
->swap_notify
)
1719 bo
->bdev
->driver
->swap_notify(bo
);
1721 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1726 * Unreserve without putting on LRU to avoid swapping out an
1727 * already swapped buffer.
1730 __ttm_bo_unreserve(bo
);
1731 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1735 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1737 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1740 EXPORT_SYMBOL(ttm_bo_swapout_all
);
1743 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1746 * @bo: Pointer to buffer
1748 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
)
1753 * In the absense of a wait_unlocked API,
1754 * Use the bo::wu_mutex to avoid triggering livelocks due to
1755 * concurrent use of this function. Note that this use of
1756 * bo::wu_mutex can go away if we change locking order to
1757 * mmap_sem -> bo::reserve.
1759 ret
= mutex_lock_interruptible(&bo
->wu_mutex
);
1760 if (unlikely(ret
!= 0))
1761 return -ERESTARTSYS
;
1762 if (!ww_mutex_is_locked(&bo
->resv
->lock
))
1764 ret
= __ttm_bo_reserve(bo
, true, false, NULL
);
1765 if (unlikely(ret
!= 0))
1767 __ttm_bo_unreserve(bo
);
1770 mutex_unlock(&bo
->wu_mutex
);