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
));
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
);
155 mutex_destroy(&bo
->wu_mutex
);
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
;
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 list_add(&bo
->lru
, bdev
->driver
->lru_tail(bo
));
175 kref_get(&bo
->list_kref
);
177 if (bo
->ttm
&& !(bo
->ttm
->page_flags
& TTM_PAGE_FLAG_SG
)) {
178 list_add(&bo
->swap
, bdev
->driver
->swap_lru_tail(bo
));
179 kref_get(&bo
->list_kref
);
183 EXPORT_SYMBOL(ttm_bo_add_to_lru
);
185 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
187 struct ttm_bo_device
*bdev
= bo
->bdev
;
190 if (bdev
->driver
->lru_removal
)
191 bdev
->driver
->lru_removal(bo
);
193 if (!list_empty(&bo
->swap
)) {
194 list_del_init(&bo
->swap
);
197 if (!list_empty(&bo
->lru
)) {
198 list_del_init(&bo
->lru
);
205 static void ttm_bo_ref_bug(struct kref
*list_kref
)
210 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
213 kref_sub(&bo
->list_kref
, count
,
214 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
217 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object
*bo
)
221 spin_lock(&bo
->glob
->lru_lock
);
222 put_count
= ttm_bo_del_from_lru(bo
);
223 spin_unlock(&bo
->glob
->lru_lock
);
224 ttm_bo_list_ref_sub(bo
, put_count
, true);
226 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru
);
228 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object
*bo
)
230 struct ttm_bo_device
*bdev
= bo
->bdev
;
233 lockdep_assert_held(&bo
->resv
->lock
.base
);
235 if (bdev
->driver
->lru_removal
)
236 bdev
->driver
->lru_removal(bo
);
238 put_count
= ttm_bo_del_from_lru(bo
);
239 ttm_bo_list_ref_sub(bo
, put_count
, true);
240 ttm_bo_add_to_lru(bo
);
242 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail
);
244 struct list_head
*ttm_bo_default_lru_tail(struct ttm_buffer_object
*bo
)
246 return bo
->bdev
->man
[bo
->mem
.mem_type
].lru
.prev
;
248 EXPORT_SYMBOL(ttm_bo_default_lru_tail
);
250 struct list_head
*ttm_bo_default_swap_lru_tail(struct ttm_buffer_object
*bo
)
252 return bo
->glob
->swap_lru
.prev
;
254 EXPORT_SYMBOL(ttm_bo_default_swap_lru_tail
);
257 * Call bo->mutex locked.
259 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
261 struct ttm_bo_device
*bdev
= bo
->bdev
;
262 struct ttm_bo_global
*glob
= bo
->glob
;
264 uint32_t page_flags
= 0;
266 TTM_ASSERT_LOCKED(&bo
->mutex
);
269 if (bdev
->need_dma32
)
270 page_flags
|= TTM_PAGE_FLAG_DMA32
;
273 case ttm_bo_type_device
:
275 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
276 case ttm_bo_type_kernel
:
277 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
278 page_flags
, glob
->dummy_read_page
);
279 if (unlikely(bo
->ttm
== NULL
))
283 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
284 page_flags
| TTM_PAGE_FLAG_SG
,
285 glob
->dummy_read_page
);
286 if (unlikely(bo
->ttm
== NULL
)) {
290 bo
->ttm
->sg
= bo
->sg
;
293 pr_err("Illegal buffer object type\n");
301 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
302 struct ttm_mem_reg
*mem
,
303 bool evict
, bool interruptible
,
306 struct ttm_bo_device
*bdev
= bo
->bdev
;
307 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
308 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
309 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
310 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
313 if (old_is_pci
|| new_is_pci
||
314 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
315 ret
= ttm_mem_io_lock(old_man
, true);
316 if (unlikely(ret
!= 0))
318 ttm_bo_unmap_virtual_locked(bo
);
319 ttm_mem_io_unlock(old_man
);
323 * Create and bind a ttm if required.
326 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
327 if (bo
->ttm
== NULL
) {
328 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
329 ret
= ttm_bo_add_ttm(bo
, zero
);
334 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
338 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
339 ret
= ttm_tt_bind(bo
->ttm
, mem
);
344 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
345 if (bdev
->driver
->move_notify
)
346 bdev
->driver
->move_notify(bo
, mem
);
353 if (bdev
->driver
->move_notify
)
354 bdev
->driver
->move_notify(bo
, mem
);
356 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
357 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
358 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_gpu
, mem
);
359 else if (bdev
->driver
->move
)
360 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
363 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_gpu
, mem
);
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
) && bo
->ttm
) {
400 ttm_tt_unbind(bo
->ttm
);
401 ttm_tt_destroy(bo
->ttm
);
410 * Will release GPU memory type usage on destruction.
411 * This is the place to put in driver specific hooks to release
412 * driver private resources.
413 * Will release the bo::reserved lock.
416 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
418 if (bo
->bdev
->driver
->move_notify
)
419 bo
->bdev
->driver
->move_notify(bo
, NULL
);
422 ttm_tt_unbind(bo
->ttm
);
423 ttm_tt_destroy(bo
->ttm
);
426 ttm_bo_mem_put(bo
, &bo
->mem
);
428 ww_mutex_unlock (&bo
->resv
->lock
);
431 static void ttm_bo_flush_all_fences(struct ttm_buffer_object
*bo
)
433 struct reservation_object_list
*fobj
;
437 fobj
= reservation_object_get_list(bo
->resv
);
438 fence
= reservation_object_get_excl(bo
->resv
);
439 if (fence
&& !fence
->ops
->signaled
)
440 fence_enable_sw_signaling(fence
);
442 for (i
= 0; fobj
&& i
< fobj
->shared_count
; ++i
) {
443 fence
= rcu_dereference_protected(fobj
->shared
[i
],
444 reservation_object_held(bo
->resv
));
446 if (!fence
->ops
->signaled
)
447 fence_enable_sw_signaling(fence
);
451 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
453 struct ttm_bo_device
*bdev
= bo
->bdev
;
454 struct ttm_bo_global
*glob
= bo
->glob
;
458 spin_lock(&glob
->lru_lock
);
459 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
462 if (!ttm_bo_wait(bo
, false, true)) {
463 put_count
= ttm_bo_del_from_lru(bo
);
465 spin_unlock(&glob
->lru_lock
);
466 ttm_bo_cleanup_memtype_use(bo
);
468 ttm_bo_list_ref_sub(bo
, put_count
, true);
472 ttm_bo_flush_all_fences(bo
);
475 * Make NO_EVICT bos immediately available to
476 * shrinkers, now that they are queued for
479 if (bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
) {
480 bo
->mem
.placement
&= ~TTM_PL_FLAG_NO_EVICT
;
481 ttm_bo_add_to_lru(bo
);
484 __ttm_bo_unreserve(bo
);
487 kref_get(&bo
->list_kref
);
488 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
489 spin_unlock(&glob
->lru_lock
);
491 schedule_delayed_work(&bdev
->wq
,
492 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
496 * function ttm_bo_cleanup_refs_and_unlock
497 * If bo idle, remove from delayed- and lru lists, and unref.
498 * If not idle, do nothing.
500 * Must be called with lru_lock and reservation held, this function
501 * will drop both before returning.
503 * @interruptible Any sleeps should occur interruptibly.
504 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
507 static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object
*bo
,
511 struct ttm_bo_global
*glob
= bo
->glob
;
515 ret
= ttm_bo_wait(bo
, false, true);
517 if (ret
&& !no_wait_gpu
) {
519 ww_mutex_unlock(&bo
->resv
->lock
);
520 spin_unlock(&glob
->lru_lock
);
522 lret
= reservation_object_wait_timeout_rcu(bo
->resv
,
532 spin_lock(&glob
->lru_lock
);
533 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
536 * We raced, and lost, someone else holds the reservation now,
537 * and is probably busy in ttm_bo_cleanup_memtype_use.
539 * Even if it's not the case, because we finished waiting any
540 * delayed destruction would succeed, so just return success
544 spin_unlock(&glob
->lru_lock
);
549 * remove sync_obj with ttm_bo_wait, the wait should be
550 * finished, and no new wait object should have been added.
552 ret
= ttm_bo_wait(bo
, false, true);
556 if (ret
|| unlikely(list_empty(&bo
->ddestroy
))) {
557 __ttm_bo_unreserve(bo
);
558 spin_unlock(&glob
->lru_lock
);
562 put_count
= ttm_bo_del_from_lru(bo
);
563 list_del_init(&bo
->ddestroy
);
566 spin_unlock(&glob
->lru_lock
);
567 ttm_bo_cleanup_memtype_use(bo
);
569 ttm_bo_list_ref_sub(bo
, put_count
, true);
575 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
576 * encountered buffers.
579 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
581 struct ttm_bo_global
*glob
= bdev
->glob
;
582 struct ttm_buffer_object
*entry
= NULL
;
585 spin_lock(&glob
->lru_lock
);
586 if (list_empty(&bdev
->ddestroy
))
589 entry
= list_first_entry(&bdev
->ddestroy
,
590 struct ttm_buffer_object
, ddestroy
);
591 kref_get(&entry
->list_kref
);
594 struct ttm_buffer_object
*nentry
= NULL
;
596 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
597 nentry
= list_first_entry(&entry
->ddestroy
,
598 struct ttm_buffer_object
, ddestroy
);
599 kref_get(&nentry
->list_kref
);
602 ret
= __ttm_bo_reserve(entry
, false, true, NULL
);
603 if (remove_all
&& ret
) {
604 spin_unlock(&glob
->lru_lock
);
605 ret
= __ttm_bo_reserve(entry
, false, false, NULL
);
606 spin_lock(&glob
->lru_lock
);
610 ret
= ttm_bo_cleanup_refs_and_unlock(entry
, false,
613 spin_unlock(&glob
->lru_lock
);
615 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
621 spin_lock(&glob
->lru_lock
);
622 if (list_empty(&entry
->ddestroy
))
627 spin_unlock(&glob
->lru_lock
);
630 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
634 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
636 struct ttm_bo_device
*bdev
=
637 container_of(work
, struct ttm_bo_device
, wq
.work
);
639 if (ttm_bo_delayed_delete(bdev
, false)) {
640 schedule_delayed_work(&bdev
->wq
,
641 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
645 static void ttm_bo_release(struct kref
*kref
)
647 struct ttm_buffer_object
*bo
=
648 container_of(kref
, struct ttm_buffer_object
, kref
);
649 struct ttm_bo_device
*bdev
= bo
->bdev
;
650 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
652 drm_vma_offset_remove(&bdev
->vma_manager
, &bo
->vma_node
);
653 ttm_mem_io_lock(man
, false);
654 ttm_mem_io_free_vm(bo
);
655 ttm_mem_io_unlock(man
);
656 ttm_bo_cleanup_refs_or_queue(bo
);
657 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
660 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
662 struct ttm_buffer_object
*bo
= *p_bo
;
665 kref_put(&bo
->kref
, ttm_bo_release
);
667 EXPORT_SYMBOL(ttm_bo_unref
);
669 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
671 return cancel_delayed_work_sync(&bdev
->wq
);
673 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
675 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
678 schedule_delayed_work(&bdev
->wq
,
679 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
681 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
683 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
686 struct ttm_bo_device
*bdev
= bo
->bdev
;
687 struct ttm_mem_reg evict_mem
;
688 struct ttm_placement placement
;
691 ret
= ttm_bo_wait(bo
, interruptible
, no_wait_gpu
);
693 if (unlikely(ret
!= 0)) {
694 if (ret
!= -ERESTARTSYS
) {
695 pr_err("Failed to expire sync object before buffer eviction\n");
700 lockdep_assert_held(&bo
->resv
->lock
.base
);
703 evict_mem
.mm_node
= NULL
;
704 evict_mem
.bus
.io_reserved_vm
= false;
705 evict_mem
.bus
.io_reserved_count
= 0;
707 placement
.num_placement
= 0;
708 placement
.num_busy_placement
= 0;
709 bdev
->driver
->evict_flags(bo
, &placement
);
710 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
713 if (ret
!= -ERESTARTSYS
) {
714 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
716 ttm_bo_mem_space_debug(bo
, &placement
);
721 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
724 if (ret
!= -ERESTARTSYS
)
725 pr_err("Buffer eviction failed\n");
726 ttm_bo_mem_put(bo
, &evict_mem
);
734 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
736 const struct ttm_place
*place
,
740 struct ttm_bo_global
*glob
= bdev
->glob
;
741 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
742 struct ttm_buffer_object
*bo
;
743 int ret
= -EBUSY
, put_count
;
745 spin_lock(&glob
->lru_lock
);
746 list_for_each_entry(bo
, &man
->lru
, lru
) {
747 ret
= __ttm_bo_reserve(bo
, false, true, NULL
);
749 if (place
&& (place
->fpfn
|| place
->lpfn
)) {
750 /* Don't evict this BO if it's outside of the
751 * requested placement range
753 if (place
->fpfn
>= (bo
->mem
.start
+ bo
->mem
.size
) ||
754 (place
->lpfn
&& place
->lpfn
<= bo
->mem
.start
)) {
755 __ttm_bo_unreserve(bo
);
766 spin_unlock(&glob
->lru_lock
);
770 kref_get(&bo
->list_kref
);
772 if (!list_empty(&bo
->ddestroy
)) {
773 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, interruptible
,
775 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
779 put_count
= ttm_bo_del_from_lru(bo
);
780 spin_unlock(&glob
->lru_lock
);
784 ttm_bo_list_ref_sub(bo
, put_count
, true);
786 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_gpu
);
787 ttm_bo_unreserve(bo
);
789 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
793 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
795 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
798 (*man
->func
->put_node
)(man
, mem
);
800 EXPORT_SYMBOL(ttm_bo_mem_put
);
803 * Repeatedly evict memory from the LRU for @mem_type until we create enough
804 * space, or we've evicted everything and there isn't enough space.
806 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
808 const struct ttm_place
*place
,
809 struct ttm_mem_reg
*mem
,
813 struct ttm_bo_device
*bdev
= bo
->bdev
;
814 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
818 ret
= (*man
->func
->get_node
)(man
, bo
, place
, mem
);
819 if (unlikely(ret
!= 0))
823 ret
= ttm_mem_evict_first(bdev
, mem_type
, place
,
824 interruptible
, no_wait_gpu
);
825 if (unlikely(ret
!= 0))
828 if (mem
->mm_node
== NULL
)
830 mem
->mem_type
= mem_type
;
834 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
835 uint32_t cur_placement
,
836 uint32_t proposed_placement
)
838 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
839 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
842 * Keep current caching if possible.
845 if ((cur_placement
& caching
) != 0)
846 result
|= (cur_placement
& caching
);
847 else if ((man
->default_caching
& caching
) != 0)
848 result
|= man
->default_caching
;
849 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
850 result
|= TTM_PL_FLAG_CACHED
;
851 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
852 result
|= TTM_PL_FLAG_WC
;
853 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
854 result
|= TTM_PL_FLAG_UNCACHED
;
859 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
861 const struct ttm_place
*place
,
862 uint32_t *masked_placement
)
864 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
866 if ((cur_flags
& place
->flags
& TTM_PL_MASK_MEM
) == 0)
869 if ((place
->flags
& man
->available_caching
) == 0)
872 cur_flags
|= (place
->flags
& man
->available_caching
);
874 *masked_placement
= cur_flags
;
879 * Creates space for memory region @mem according to its type.
881 * This function first searches for free space in compatible memory types in
882 * the priority order defined by the driver. If free space isn't found, then
883 * ttm_bo_mem_force_space is attempted in priority order to evict and find
886 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
887 struct ttm_placement
*placement
,
888 struct ttm_mem_reg
*mem
,
892 struct ttm_bo_device
*bdev
= bo
->bdev
;
893 struct ttm_mem_type_manager
*man
;
894 uint32_t mem_type
= TTM_PL_SYSTEM
;
895 uint32_t cur_flags
= 0;
896 bool type_found
= false;
897 bool type_ok
= false;
898 bool has_erestartsys
= false;
902 for (i
= 0; i
< placement
->num_placement
; ++i
) {
903 const struct ttm_place
*place
= &placement
->placement
[i
];
905 ret
= ttm_mem_type_from_place(place
, &mem_type
);
908 man
= &bdev
->man
[mem_type
];
909 if (!man
->has_type
|| !man
->use_type
)
912 type_ok
= ttm_bo_mt_compatible(man
, mem_type
, place
,
919 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
922 * Use the access and other non-mapping-related flag bits from
923 * the memory placement flags to the current flags
925 ttm_flag_masked(&cur_flags
, place
->flags
,
926 ~TTM_PL_MASK_MEMTYPE
);
928 if (mem_type
== TTM_PL_SYSTEM
)
931 ret
= (*man
->func
->get_node
)(man
, bo
, place
, mem
);
939 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
940 mem
->mem_type
= mem_type
;
941 mem
->placement
= cur_flags
;
945 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
946 const struct ttm_place
*place
= &placement
->busy_placement
[i
];
948 ret
= ttm_mem_type_from_place(place
, &mem_type
);
951 man
= &bdev
->man
[mem_type
];
952 if (!man
->has_type
|| !man
->use_type
)
954 if (!ttm_bo_mt_compatible(man
, mem_type
, place
, &cur_flags
))
958 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
961 * Use the access and other non-mapping-related flag bits from
962 * the memory placement flags to the current flags
964 ttm_flag_masked(&cur_flags
, place
->flags
,
965 ~TTM_PL_MASK_MEMTYPE
);
967 if (mem_type
== TTM_PL_SYSTEM
) {
968 mem
->mem_type
= mem_type
;
969 mem
->placement
= cur_flags
;
974 ret
= ttm_bo_mem_force_space(bo
, mem_type
, place
, mem
,
975 interruptible
, no_wait_gpu
);
976 if (ret
== 0 && mem
->mm_node
) {
977 mem
->placement
= cur_flags
;
980 if (ret
== -ERESTARTSYS
)
981 has_erestartsys
= true;
985 printk(KERN_ERR TTM_PFX
"No compatible memory type found.\n");
989 return (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
991 EXPORT_SYMBOL(ttm_bo_mem_space
);
993 static int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
994 struct ttm_placement
*placement
,
999 struct ttm_mem_reg mem
;
1001 lockdep_assert_held(&bo
->resv
->lock
.base
);
1004 * Don't wait for the BO on initial allocation. This is important when
1005 * the BO has an imported reservation object.
1007 if (bo
->mem
.mem_type
!= TTM_PL_SYSTEM
|| bo
->ttm
!= NULL
) {
1009 * FIXME: It's possible to pipeline buffer moves.
1010 * Have the driver move function wait for idle when necessary,
1011 * instead of doing it here.
1013 ret
= ttm_bo_wait(bo
, interruptible
, no_wait_gpu
);
1017 mem
.num_pages
= bo
->num_pages
;
1018 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1019 mem
.page_alignment
= bo
->mem
.page_alignment
;
1020 mem
.bus
.io_reserved_vm
= false;
1021 mem
.bus
.io_reserved_count
= 0;
1023 * Determine where to move the buffer.
1025 ret
= ttm_bo_mem_space(bo
, placement
, &mem
,
1026 interruptible
, no_wait_gpu
);
1029 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false,
1030 interruptible
, no_wait_gpu
);
1032 if (ret
&& mem
.mm_node
)
1033 ttm_bo_mem_put(bo
, &mem
);
1037 bool ttm_bo_mem_compat(struct ttm_placement
*placement
,
1038 struct ttm_mem_reg
*mem
,
1039 uint32_t *new_flags
)
1043 for (i
= 0; i
< placement
->num_placement
; i
++) {
1044 const struct ttm_place
*heap
= &placement
->placement
[i
];
1046 (mem
->start
< heap
->fpfn
||
1047 (heap
->lpfn
!= 0 && (mem
->start
+ mem
->num_pages
) > heap
->lpfn
)))
1050 *new_flags
= heap
->flags
;
1051 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1052 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1056 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1057 const struct ttm_place
*heap
= &placement
->busy_placement
[i
];
1059 (mem
->start
< heap
->fpfn
||
1060 (heap
->lpfn
!= 0 && (mem
->start
+ mem
->num_pages
) > heap
->lpfn
)))
1063 *new_flags
= heap
->flags
;
1064 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1065 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1071 EXPORT_SYMBOL(ttm_bo_mem_compat
);
1073 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1074 struct ttm_placement
*placement
,
1081 lockdep_assert_held(&bo
->resv
->lock
.base
);
1083 * Check whether we need to move buffer.
1085 if (!ttm_bo_mem_compat(placement
, &bo
->mem
, &new_flags
)) {
1086 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
,
1092 * Use the access and other non-mapping-related flag bits from
1093 * the compatible memory placement flags to the active flags
1095 ttm_flag_masked(&bo
->mem
.placement
, new_flags
,
1096 ~TTM_PL_MASK_MEMTYPE
);
1099 * We might need to add a TTM.
1101 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1102 ret
= ttm_bo_add_ttm(bo
, true);
1108 EXPORT_SYMBOL(ttm_bo_validate
);
1110 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1111 struct ttm_buffer_object
*bo
,
1113 enum ttm_bo_type type
,
1114 struct ttm_placement
*placement
,
1115 uint32_t page_alignment
,
1117 struct file
*persistent_swap_storage
,
1119 struct sg_table
*sg
,
1120 struct reservation_object
*resv
,
1121 void (*destroy
) (struct ttm_buffer_object
*))
1124 unsigned long num_pages
;
1125 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1128 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1130 pr_err("Out of kernel memory\n");
1138 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1139 if (num_pages
== 0) {
1140 pr_err("Illegal buffer object size\n");
1145 ttm_mem_global_free(mem_glob
, acc_size
);
1148 bo
->destroy
= destroy
;
1150 kref_init(&bo
->kref
);
1151 kref_init(&bo
->list_kref
);
1152 atomic_set(&bo
->cpu_writers
, 0);
1153 INIT_LIST_HEAD(&bo
->lru
);
1154 INIT_LIST_HEAD(&bo
->ddestroy
);
1155 INIT_LIST_HEAD(&bo
->swap
);
1156 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1157 mutex_init(&bo
->wu_mutex
);
1159 bo
->glob
= bdev
->glob
;
1161 bo
->num_pages
= num_pages
;
1162 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1163 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1164 bo
->mem
.num_pages
= bo
->num_pages
;
1165 bo
->mem
.mm_node
= NULL
;
1166 bo
->mem
.page_alignment
= page_alignment
;
1167 bo
->mem
.bus
.io_reserved_vm
= false;
1168 bo
->mem
.bus
.io_reserved_count
= 0;
1170 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1171 bo
->persistent_swap_storage
= persistent_swap_storage
;
1172 bo
->acc_size
= acc_size
;
1176 lockdep_assert_held(&bo
->resv
->lock
.base
);
1178 bo
->resv
= &bo
->ttm_resv
;
1179 reservation_object_init(&bo
->ttm_resv
);
1181 atomic_inc(&bo
->glob
->bo_count
);
1182 drm_vma_node_reset(&bo
->vma_node
);
1185 * For ttm_bo_type_device buffers, allocate
1186 * address space from the device.
1188 if (bo
->type
== ttm_bo_type_device
||
1189 bo
->type
== ttm_bo_type_sg
)
1190 ret
= drm_vma_offset_add(&bdev
->vma_manager
, &bo
->vma_node
,
1193 /* passed reservation objects should already be locked,
1194 * since otherwise lockdep will be angered in radeon.
1197 locked
= ww_mutex_trylock(&bo
->resv
->lock
);
1202 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1205 ttm_bo_unreserve(bo
);
1207 } else if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
1208 spin_lock(&bo
->glob
->lru_lock
);
1209 ttm_bo_add_to_lru(bo
);
1210 spin_unlock(&bo
->glob
->lru_lock
);
1218 EXPORT_SYMBOL(ttm_bo_init
);
1220 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1221 unsigned long bo_size
,
1222 unsigned struct_size
)
1224 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1227 size
+= ttm_round_pot(struct_size
);
1228 size
+= ttm_round_pot(npages
* sizeof(void *));
1229 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1232 EXPORT_SYMBOL(ttm_bo_acc_size
);
1234 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1235 unsigned long bo_size
,
1236 unsigned struct_size
)
1238 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1241 size
+= ttm_round_pot(struct_size
);
1242 size
+= ttm_round_pot(npages
* (2*sizeof(void *) + sizeof(dma_addr_t
)));
1243 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1246 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1248 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1250 enum ttm_bo_type type
,
1251 struct ttm_placement
*placement
,
1252 uint32_t page_alignment
,
1254 struct file
*persistent_swap_storage
,
1255 struct ttm_buffer_object
**p_bo
)
1257 struct ttm_buffer_object
*bo
;
1261 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1262 if (unlikely(bo
== NULL
))
1265 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1266 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1267 interruptible
, persistent_swap_storage
, acc_size
,
1269 if (likely(ret
== 0))
1274 EXPORT_SYMBOL(ttm_bo_create
);
1276 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1277 unsigned mem_type
, bool allow_errors
)
1279 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1280 struct ttm_bo_global
*glob
= bdev
->glob
;
1284 * Can't use standard list traversal since we're unlocking.
1287 spin_lock(&glob
->lru_lock
);
1288 while (!list_empty(&man
->lru
)) {
1289 spin_unlock(&glob
->lru_lock
);
1290 ret
= ttm_mem_evict_first(bdev
, mem_type
, NULL
, false, false);
1295 pr_err("Cleanup eviction failed\n");
1298 spin_lock(&glob
->lru_lock
);
1300 spin_unlock(&glob
->lru_lock
);
1304 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1306 struct ttm_mem_type_manager
*man
;
1309 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1310 pr_err("Illegal memory type %d\n", mem_type
);
1313 man
= &bdev
->man
[mem_type
];
1315 if (!man
->has_type
) {
1316 pr_err("Trying to take down uninitialized memory manager type %u\n",
1321 man
->use_type
= false;
1322 man
->has_type
= false;
1326 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1328 ret
= (*man
->func
->takedown
)(man
);
1333 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1335 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1337 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1339 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1340 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1344 if (!man
->has_type
) {
1345 pr_err("Memory type %u has not been initialized\n", mem_type
);
1349 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1351 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1353 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1354 unsigned long p_size
)
1357 struct ttm_mem_type_manager
*man
;
1359 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1360 man
= &bdev
->man
[type
];
1361 BUG_ON(man
->has_type
);
1362 man
->io_reserve_fastpath
= true;
1363 man
->use_io_reserve_lru
= false;
1364 mutex_init(&man
->io_reserve_mutex
);
1365 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1367 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1373 if (type
!= TTM_PL_SYSTEM
) {
1374 ret
= (*man
->func
->init
)(man
, p_size
);
1378 man
->has_type
= true;
1379 man
->use_type
= true;
1382 INIT_LIST_HEAD(&man
->lru
);
1386 EXPORT_SYMBOL(ttm_bo_init_mm
);
1388 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1390 struct ttm_bo_global
*glob
=
1391 container_of(kobj
, struct ttm_bo_global
, kobj
);
1393 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1394 __free_page(glob
->dummy_read_page
);
1398 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1400 struct ttm_bo_global
*glob
= ref
->object
;
1402 kobject_del(&glob
->kobj
);
1403 kobject_put(&glob
->kobj
);
1405 EXPORT_SYMBOL(ttm_bo_global_release
);
1407 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1409 struct ttm_bo_global_ref
*bo_ref
=
1410 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1411 struct ttm_bo_global
*glob
= ref
->object
;
1414 mutex_init(&glob
->device_list_mutex
);
1415 spin_lock_init(&glob
->lru_lock
);
1416 glob
->mem_glob
= bo_ref
->mem_glob
;
1417 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1419 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1424 INIT_LIST_HEAD(&glob
->swap_lru
);
1425 INIT_LIST_HEAD(&glob
->device_list
);
1427 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1428 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1429 if (unlikely(ret
!= 0)) {
1430 pr_err("Could not register buffer object swapout\n");
1434 atomic_set(&glob
->bo_count
, 0);
1436 ret
= kobject_init_and_add(
1437 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1438 if (unlikely(ret
!= 0))
1439 kobject_put(&glob
->kobj
);
1442 __free_page(glob
->dummy_read_page
);
1447 EXPORT_SYMBOL(ttm_bo_global_init
);
1450 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1453 unsigned i
= TTM_NUM_MEM_TYPES
;
1454 struct ttm_mem_type_manager
*man
;
1455 struct ttm_bo_global
*glob
= bdev
->glob
;
1458 man
= &bdev
->man
[i
];
1459 if (man
->has_type
) {
1460 man
->use_type
= false;
1461 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1463 pr_err("DRM memory manager type %d is not clean\n",
1466 man
->has_type
= false;
1470 mutex_lock(&glob
->device_list_mutex
);
1471 list_del(&bdev
->device_list
);
1472 mutex_unlock(&glob
->device_list_mutex
);
1474 cancel_delayed_work_sync(&bdev
->wq
);
1476 while (ttm_bo_delayed_delete(bdev
, true))
1479 spin_lock(&glob
->lru_lock
);
1480 if (list_empty(&bdev
->ddestroy
))
1481 TTM_DEBUG("Delayed destroy list was clean\n");
1483 if (list_empty(&bdev
->man
[0].lru
))
1484 TTM_DEBUG("Swap list was clean\n");
1485 spin_unlock(&glob
->lru_lock
);
1487 drm_vma_offset_manager_destroy(&bdev
->vma_manager
);
1491 EXPORT_SYMBOL(ttm_bo_device_release
);
1493 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1494 struct ttm_bo_global
*glob
,
1495 struct ttm_bo_driver
*driver
,
1496 struct address_space
*mapping
,
1497 uint64_t file_page_offset
,
1502 bdev
->driver
= driver
;
1504 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1507 * Initialize the system memory buffer type.
1508 * Other types need to be driver / IOCTL initialized.
1510 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1511 if (unlikely(ret
!= 0))
1514 drm_vma_offset_manager_init(&bdev
->vma_manager
, file_page_offset
,
1516 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1517 INIT_LIST_HEAD(&bdev
->ddestroy
);
1518 bdev
->dev_mapping
= mapping
;
1520 bdev
->need_dma32
= need_dma32
;
1521 mutex_lock(&glob
->device_list_mutex
);
1522 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1523 mutex_unlock(&glob
->device_list_mutex
);
1529 EXPORT_SYMBOL(ttm_bo_device_init
);
1532 * buffer object vm functions.
1535 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1537 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1539 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1540 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1543 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1546 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1552 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1554 struct ttm_bo_device
*bdev
= bo
->bdev
;
1556 drm_vma_node_unmap(&bo
->vma_node
, bdev
->dev_mapping
);
1557 ttm_mem_io_free_vm(bo
);
1560 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1562 struct ttm_bo_device
*bdev
= bo
->bdev
;
1563 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1565 ttm_mem_io_lock(man
, false);
1566 ttm_bo_unmap_virtual_locked(bo
);
1567 ttm_mem_io_unlock(man
);
1571 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1573 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1574 bool interruptible
, bool no_wait
)
1576 struct reservation_object_list
*fobj
;
1577 struct reservation_object
*resv
;
1579 long timeout
= 15 * HZ
;
1583 fobj
= reservation_object_get_list(resv
);
1584 excl
= reservation_object_get_excl(resv
);
1586 if (!fence_is_signaled(excl
)) {
1590 timeout
= fence_wait_timeout(excl
,
1591 interruptible
, timeout
);
1595 for (i
= 0; fobj
&& timeout
> 0 && i
< fobj
->shared_count
; ++i
) {
1596 struct fence
*fence
;
1597 fence
= rcu_dereference_protected(fobj
->shared
[i
],
1598 reservation_object_held(resv
));
1600 if (!fence_is_signaled(fence
)) {
1604 timeout
= fence_wait_timeout(fence
,
1605 interruptible
, timeout
);
1615 reservation_object_add_excl_fence(resv
, NULL
);
1616 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
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 * Wait for GPU, then move to system cached.
1689 ret
= ttm_bo_wait(bo
, false, false);
1691 if (unlikely(ret
!= 0))
1694 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1695 struct ttm_mem_reg evict_mem
;
1697 evict_mem
= bo
->mem
;
1698 evict_mem
.mm_node
= NULL
;
1699 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1700 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1702 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1704 if (unlikely(ret
!= 0))
1708 ttm_bo_unmap_virtual(bo
);
1711 * Swap out. Buffer will be swapped in again as soon as
1712 * anyone tries to access a ttm page.
1715 if (bo
->bdev
->driver
->swap_notify
)
1716 bo
->bdev
->driver
->swap_notify(bo
);
1718 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1723 * Unreserve without putting on LRU to avoid swapping out an
1724 * already swapped buffer.
1727 __ttm_bo_unreserve(bo
);
1728 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1732 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1734 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1737 EXPORT_SYMBOL(ttm_bo_swapout_all
);
1740 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1743 * @bo: Pointer to buffer
1745 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
)
1750 * In the absense of a wait_unlocked API,
1751 * Use the bo::wu_mutex to avoid triggering livelocks due to
1752 * concurrent use of this function. Note that this use of
1753 * bo::wu_mutex can go away if we change locking order to
1754 * mmap_sem -> bo::reserve.
1756 ret
= mutex_lock_interruptible(&bo
->wu_mutex
);
1757 if (unlikely(ret
!= 0))
1758 return -ERESTARTSYS
;
1759 if (!ww_mutex_is_locked(&bo
->resv
->lock
))
1761 ret
= __ttm_bo_reserve(bo
, true, false, NULL
);
1762 if (unlikely(ret
!= 0))
1764 __ttm_bo_unreserve(bo
);
1767 mutex_unlock(&bo
->wu_mutex
);