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
;
167 struct ttm_mem_type_manager
*man
;
169 lockdep_assert_held(&bo
->resv
->lock
.base
);
171 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
173 BUG_ON(!list_empty(&bo
->lru
));
175 man
= &bdev
->man
[bo
->mem
.mem_type
];
176 list_add_tail(&bo
->lru
, &man
->lru
);
177 kref_get(&bo
->list_kref
);
179 if (bo
->ttm
&& !(bo
->ttm
->page_flags
& TTM_PAGE_FLAG_SG
)) {
180 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
181 kref_get(&bo
->list_kref
);
185 EXPORT_SYMBOL(ttm_bo_add_to_lru
);
187 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
191 if (!list_empty(&bo
->swap
)) {
192 list_del_init(&bo
->swap
);
195 if (!list_empty(&bo
->lru
)) {
196 list_del_init(&bo
->lru
);
201 * TODO: Add a driver hook to delete from
202 * driver-specific LRU's here.
208 static void ttm_bo_ref_bug(struct kref
*list_kref
)
213 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
216 kref_sub(&bo
->list_kref
, count
,
217 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
220 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object
*bo
)
224 spin_lock(&bo
->glob
->lru_lock
);
225 put_count
= ttm_bo_del_from_lru(bo
);
226 spin_unlock(&bo
->glob
->lru_lock
);
227 ttm_bo_list_ref_sub(bo
, put_count
, true);
229 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru
);
231 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object
*bo
)
235 lockdep_assert_held(&bo
->resv
->lock
.base
);
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
);
244 * Call bo->mutex locked.
246 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
248 struct ttm_bo_device
*bdev
= bo
->bdev
;
249 struct ttm_bo_global
*glob
= bo
->glob
;
251 uint32_t page_flags
= 0;
253 TTM_ASSERT_LOCKED(&bo
->mutex
);
256 if (bdev
->need_dma32
)
257 page_flags
|= TTM_PAGE_FLAG_DMA32
;
260 case ttm_bo_type_device
:
262 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
263 case ttm_bo_type_kernel
:
264 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
265 page_flags
, glob
->dummy_read_page
);
266 if (unlikely(bo
->ttm
== NULL
))
270 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
271 page_flags
| TTM_PAGE_FLAG_SG
,
272 glob
->dummy_read_page
);
273 if (unlikely(bo
->ttm
== NULL
)) {
277 bo
->ttm
->sg
= bo
->sg
;
280 pr_err("Illegal buffer object type\n");
288 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
289 struct ttm_mem_reg
*mem
,
290 bool evict
, bool interruptible
,
293 struct ttm_bo_device
*bdev
= bo
->bdev
;
294 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
295 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
296 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
297 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
300 if (old_is_pci
|| new_is_pci
||
301 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
302 ret
= ttm_mem_io_lock(old_man
, true);
303 if (unlikely(ret
!= 0))
305 ttm_bo_unmap_virtual_locked(bo
);
306 ttm_mem_io_unlock(old_man
);
310 * Create and bind a ttm if required.
313 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
314 if (bo
->ttm
== NULL
) {
315 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
316 ret
= ttm_bo_add_ttm(bo
, zero
);
321 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
325 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
326 ret
= ttm_tt_bind(bo
->ttm
, mem
);
331 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
332 if (bdev
->driver
->move_notify
)
333 bdev
->driver
->move_notify(bo
, mem
);
340 if (bdev
->driver
->move_notify
)
341 bdev
->driver
->move_notify(bo
, mem
);
343 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
344 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
345 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_gpu
, mem
);
346 else if (bdev
->driver
->move
)
347 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
350 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_gpu
, mem
);
353 if (bdev
->driver
->move_notify
) {
354 struct ttm_mem_reg tmp_mem
= *mem
;
357 bdev
->driver
->move_notify(bo
, mem
);
367 if (bdev
->driver
->invalidate_caches
) {
368 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
370 pr_err("Can not flush read caches\n");
375 if (bo
->mem
.mm_node
) {
376 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
377 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
378 bo
->cur_placement
= bo
->mem
.placement
;
385 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
386 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
387 ttm_tt_unbind(bo
->ttm
);
388 ttm_tt_destroy(bo
->ttm
);
397 * Will release GPU memory type usage on destruction.
398 * This is the place to put in driver specific hooks to release
399 * driver private resources.
400 * Will release the bo::reserved lock.
403 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
405 if (bo
->bdev
->driver
->move_notify
)
406 bo
->bdev
->driver
->move_notify(bo
, NULL
);
409 ttm_tt_unbind(bo
->ttm
);
410 ttm_tt_destroy(bo
->ttm
);
413 ttm_bo_mem_put(bo
, &bo
->mem
);
415 ww_mutex_unlock (&bo
->resv
->lock
);
418 static void ttm_bo_flush_all_fences(struct ttm_buffer_object
*bo
)
420 struct reservation_object_list
*fobj
;
424 fobj
= reservation_object_get_list(bo
->resv
);
425 fence
= reservation_object_get_excl(bo
->resv
);
426 if (fence
&& !fence
->ops
->signaled
)
427 fence_enable_sw_signaling(fence
);
429 for (i
= 0; fobj
&& i
< fobj
->shared_count
; ++i
) {
430 fence
= rcu_dereference_protected(fobj
->shared
[i
],
431 reservation_object_held(bo
->resv
));
433 if (!fence
->ops
->signaled
)
434 fence_enable_sw_signaling(fence
);
438 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
440 struct ttm_bo_device
*bdev
= bo
->bdev
;
441 struct ttm_bo_global
*glob
= bo
->glob
;
445 spin_lock(&glob
->lru_lock
);
446 ret
= __ttm_bo_reserve(bo
, false, true, false, NULL
);
449 if (!ttm_bo_wait(bo
, false, false, true)) {
450 put_count
= ttm_bo_del_from_lru(bo
);
452 spin_unlock(&glob
->lru_lock
);
453 ttm_bo_cleanup_memtype_use(bo
);
455 ttm_bo_list_ref_sub(bo
, put_count
, true);
459 ttm_bo_flush_all_fences(bo
);
462 * Make NO_EVICT bos immediately available to
463 * shrinkers, now that they are queued for
466 if (bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
) {
467 bo
->mem
.placement
&= ~TTM_PL_FLAG_NO_EVICT
;
468 ttm_bo_add_to_lru(bo
);
471 __ttm_bo_unreserve(bo
);
474 kref_get(&bo
->list_kref
);
475 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
476 spin_unlock(&glob
->lru_lock
);
478 schedule_delayed_work(&bdev
->wq
,
479 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
483 * function ttm_bo_cleanup_refs_and_unlock
484 * If bo idle, remove from delayed- and lru lists, and unref.
485 * If not idle, do nothing.
487 * Must be called with lru_lock and reservation held, this function
488 * will drop both before returning.
490 * @interruptible Any sleeps should occur interruptibly.
491 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
494 static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object
*bo
,
498 struct ttm_bo_global
*glob
= bo
->glob
;
502 ret
= ttm_bo_wait(bo
, false, false, true);
504 if (ret
&& !no_wait_gpu
) {
506 ww_mutex_unlock(&bo
->resv
->lock
);
507 spin_unlock(&glob
->lru_lock
);
509 lret
= reservation_object_wait_timeout_rcu(bo
->resv
,
519 spin_lock(&glob
->lru_lock
);
520 ret
= __ttm_bo_reserve(bo
, false, true, false, NULL
);
523 * We raced, and lost, someone else holds the reservation now,
524 * and is probably busy in ttm_bo_cleanup_memtype_use.
526 * Even if it's not the case, because we finished waiting any
527 * delayed destruction would succeed, so just return success
531 spin_unlock(&glob
->lru_lock
);
536 * remove sync_obj with ttm_bo_wait, the wait should be
537 * finished, and no new wait object should have been added.
539 ret
= ttm_bo_wait(bo
, false, false, true);
543 if (ret
|| unlikely(list_empty(&bo
->ddestroy
))) {
544 __ttm_bo_unreserve(bo
);
545 spin_unlock(&glob
->lru_lock
);
549 put_count
= ttm_bo_del_from_lru(bo
);
550 list_del_init(&bo
->ddestroy
);
553 spin_unlock(&glob
->lru_lock
);
554 ttm_bo_cleanup_memtype_use(bo
);
556 ttm_bo_list_ref_sub(bo
, put_count
, true);
562 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
563 * encountered buffers.
566 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
568 struct ttm_bo_global
*glob
= bdev
->glob
;
569 struct ttm_buffer_object
*entry
= NULL
;
572 spin_lock(&glob
->lru_lock
);
573 if (list_empty(&bdev
->ddestroy
))
576 entry
= list_first_entry(&bdev
->ddestroy
,
577 struct ttm_buffer_object
, ddestroy
);
578 kref_get(&entry
->list_kref
);
581 struct ttm_buffer_object
*nentry
= NULL
;
583 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
584 nentry
= list_first_entry(&entry
->ddestroy
,
585 struct ttm_buffer_object
, ddestroy
);
586 kref_get(&nentry
->list_kref
);
589 ret
= __ttm_bo_reserve(entry
, false, true, false, NULL
);
590 if (remove_all
&& ret
) {
591 spin_unlock(&glob
->lru_lock
);
592 ret
= __ttm_bo_reserve(entry
, false, false,
594 spin_lock(&glob
->lru_lock
);
598 ret
= ttm_bo_cleanup_refs_and_unlock(entry
, false,
601 spin_unlock(&glob
->lru_lock
);
603 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
609 spin_lock(&glob
->lru_lock
);
610 if (list_empty(&entry
->ddestroy
))
615 spin_unlock(&glob
->lru_lock
);
618 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
622 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
624 struct ttm_bo_device
*bdev
=
625 container_of(work
, struct ttm_bo_device
, wq
.work
);
627 if (ttm_bo_delayed_delete(bdev
, false)) {
628 schedule_delayed_work(&bdev
->wq
,
629 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
633 static void ttm_bo_release(struct kref
*kref
)
635 struct ttm_buffer_object
*bo
=
636 container_of(kref
, struct ttm_buffer_object
, kref
);
637 struct ttm_bo_device
*bdev
= bo
->bdev
;
638 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
640 drm_vma_offset_remove(&bdev
->vma_manager
, &bo
->vma_node
);
641 ttm_mem_io_lock(man
, false);
642 ttm_mem_io_free_vm(bo
);
643 ttm_mem_io_unlock(man
);
644 ttm_bo_cleanup_refs_or_queue(bo
);
645 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
648 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
650 struct ttm_buffer_object
*bo
= *p_bo
;
653 kref_put(&bo
->kref
, ttm_bo_release
);
655 EXPORT_SYMBOL(ttm_bo_unref
);
657 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
659 return cancel_delayed_work_sync(&bdev
->wq
);
661 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
663 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
666 schedule_delayed_work(&bdev
->wq
,
667 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
669 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
671 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
674 struct ttm_bo_device
*bdev
= bo
->bdev
;
675 struct ttm_mem_reg evict_mem
;
676 struct ttm_placement placement
;
679 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
681 if (unlikely(ret
!= 0)) {
682 if (ret
!= -ERESTARTSYS
) {
683 pr_err("Failed to expire sync object before buffer eviction\n");
688 lockdep_assert_held(&bo
->resv
->lock
.base
);
691 evict_mem
.mm_node
= NULL
;
692 evict_mem
.bus
.io_reserved_vm
= false;
693 evict_mem
.bus
.io_reserved_count
= 0;
695 placement
.num_placement
= 0;
696 placement
.num_busy_placement
= 0;
697 bdev
->driver
->evict_flags(bo
, &placement
);
698 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
701 if (ret
!= -ERESTARTSYS
) {
702 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
704 ttm_bo_mem_space_debug(bo
, &placement
);
709 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
712 if (ret
!= -ERESTARTSYS
)
713 pr_err("Buffer eviction failed\n");
714 ttm_bo_mem_put(bo
, &evict_mem
);
722 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
724 const struct ttm_place
*place
,
728 struct ttm_bo_global
*glob
= bdev
->glob
;
729 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
730 struct ttm_buffer_object
*bo
;
731 int ret
= -EBUSY
, put_count
;
733 spin_lock(&glob
->lru_lock
);
734 list_for_each_entry(bo
, &man
->lru
, lru
) {
735 ret
= __ttm_bo_reserve(bo
, false, true, false, NULL
);
737 if (place
&& (place
->fpfn
|| place
->lpfn
)) {
738 /* Don't evict this BO if it's outside of the
739 * requested placement range
741 if (place
->fpfn
>= (bo
->mem
.start
+ bo
->mem
.size
) ||
742 (place
->lpfn
&& place
->lpfn
<= bo
->mem
.start
)) {
743 __ttm_bo_unreserve(bo
);
754 spin_unlock(&glob
->lru_lock
);
758 kref_get(&bo
->list_kref
);
760 if (!list_empty(&bo
->ddestroy
)) {
761 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, interruptible
,
763 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
767 put_count
= ttm_bo_del_from_lru(bo
);
768 spin_unlock(&glob
->lru_lock
);
772 ttm_bo_list_ref_sub(bo
, put_count
, true);
774 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_gpu
);
775 ttm_bo_unreserve(bo
);
777 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
781 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
783 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
786 (*man
->func
->put_node
)(man
, mem
);
788 EXPORT_SYMBOL(ttm_bo_mem_put
);
791 * Repeatedly evict memory from the LRU for @mem_type until we create enough
792 * space, or we've evicted everything and there isn't enough space.
794 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
796 const struct ttm_place
*place
,
797 struct ttm_mem_reg
*mem
,
801 struct ttm_bo_device
*bdev
= bo
->bdev
;
802 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
806 ret
= (*man
->func
->get_node
)(man
, bo
, place
, mem
);
807 if (unlikely(ret
!= 0))
811 ret
= ttm_mem_evict_first(bdev
, mem_type
, place
,
812 interruptible
, no_wait_gpu
);
813 if (unlikely(ret
!= 0))
816 if (mem
->mm_node
== NULL
)
818 mem
->mem_type
= mem_type
;
822 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
823 uint32_t cur_placement
,
824 uint32_t proposed_placement
)
826 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
827 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
830 * Keep current caching if possible.
833 if ((cur_placement
& caching
) != 0)
834 result
|= (cur_placement
& caching
);
835 else if ((man
->default_caching
& caching
) != 0)
836 result
|= man
->default_caching
;
837 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
838 result
|= TTM_PL_FLAG_CACHED
;
839 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
840 result
|= TTM_PL_FLAG_WC
;
841 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
842 result
|= TTM_PL_FLAG_UNCACHED
;
847 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
849 const struct ttm_place
*place
,
850 uint32_t *masked_placement
)
852 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
854 if ((cur_flags
& place
->flags
& TTM_PL_MASK_MEM
) == 0)
857 if ((place
->flags
& man
->available_caching
) == 0)
860 cur_flags
|= (place
->flags
& man
->available_caching
);
862 *masked_placement
= cur_flags
;
867 * Creates space for memory region @mem according to its type.
869 * This function first searches for free space in compatible memory types in
870 * the priority order defined by the driver. If free space isn't found, then
871 * ttm_bo_mem_force_space is attempted in priority order to evict and find
874 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
875 struct ttm_placement
*placement
,
876 struct ttm_mem_reg
*mem
,
880 struct ttm_bo_device
*bdev
= bo
->bdev
;
881 struct ttm_mem_type_manager
*man
;
882 uint32_t mem_type
= TTM_PL_SYSTEM
;
883 uint32_t cur_flags
= 0;
884 bool type_found
= false;
885 bool type_ok
= false;
886 bool has_erestartsys
= false;
890 for (i
= 0; i
< placement
->num_placement
; ++i
) {
891 const struct ttm_place
*place
= &placement
->placement
[i
];
893 ret
= ttm_mem_type_from_place(place
, &mem_type
);
896 man
= &bdev
->man
[mem_type
];
897 if (!man
->has_type
|| !man
->use_type
)
900 type_ok
= ttm_bo_mt_compatible(man
, mem_type
, place
,
907 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
910 * Use the access and other non-mapping-related flag bits from
911 * the memory placement flags to the current flags
913 ttm_flag_masked(&cur_flags
, place
->flags
,
914 ~TTM_PL_MASK_MEMTYPE
);
916 if (mem_type
== TTM_PL_SYSTEM
)
919 ret
= (*man
->func
->get_node
)(man
, bo
, place
, mem
);
927 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
928 mem
->mem_type
= mem_type
;
929 mem
->placement
= cur_flags
;
933 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
934 const struct ttm_place
*place
= &placement
->busy_placement
[i
];
936 ret
= ttm_mem_type_from_place(place
, &mem_type
);
939 man
= &bdev
->man
[mem_type
];
940 if (!man
->has_type
|| !man
->use_type
)
942 if (!ttm_bo_mt_compatible(man
, mem_type
, place
, &cur_flags
))
946 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
949 * Use the access and other non-mapping-related flag bits from
950 * the memory placement flags to the current flags
952 ttm_flag_masked(&cur_flags
, place
->flags
,
953 ~TTM_PL_MASK_MEMTYPE
);
955 if (mem_type
== TTM_PL_SYSTEM
) {
956 mem
->mem_type
= mem_type
;
957 mem
->placement
= cur_flags
;
962 ret
= ttm_bo_mem_force_space(bo
, mem_type
, place
, mem
,
963 interruptible
, no_wait_gpu
);
964 if (ret
== 0 && mem
->mm_node
) {
965 mem
->placement
= cur_flags
;
968 if (ret
== -ERESTARTSYS
)
969 has_erestartsys
= true;
973 printk(KERN_ERR TTM_PFX
"No compatible memory type found.\n");
977 return (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
979 EXPORT_SYMBOL(ttm_bo_mem_space
);
981 static int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
982 struct ttm_placement
*placement
,
987 struct ttm_mem_reg mem
;
989 lockdep_assert_held(&bo
->resv
->lock
.base
);
992 * FIXME: It's possible to pipeline buffer moves.
993 * Have the driver move function wait for idle when necessary,
994 * instead of doing it here.
996 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
999 mem
.num_pages
= bo
->num_pages
;
1000 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1001 mem
.page_alignment
= bo
->mem
.page_alignment
;
1002 mem
.bus
.io_reserved_vm
= false;
1003 mem
.bus
.io_reserved_count
= 0;
1005 * Determine where to move the buffer.
1007 ret
= ttm_bo_mem_space(bo
, placement
, &mem
,
1008 interruptible
, no_wait_gpu
);
1011 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false,
1012 interruptible
, no_wait_gpu
);
1014 if (ret
&& mem
.mm_node
)
1015 ttm_bo_mem_put(bo
, &mem
);
1019 static bool ttm_bo_mem_compat(struct ttm_placement
*placement
,
1020 struct ttm_mem_reg
*mem
,
1021 uint32_t *new_flags
)
1025 for (i
= 0; i
< placement
->num_placement
; i
++) {
1026 const struct ttm_place
*heap
= &placement
->placement
[i
];
1028 (mem
->start
< heap
->fpfn
||
1029 (heap
->lpfn
!= 0 && (mem
->start
+ mem
->num_pages
) > heap
->lpfn
)))
1032 *new_flags
= heap
->flags
;
1033 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1034 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1038 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1039 const struct ttm_place
*heap
= &placement
->busy_placement
[i
];
1041 (mem
->start
< heap
->fpfn
||
1042 (heap
->lpfn
!= 0 && (mem
->start
+ mem
->num_pages
) > heap
->lpfn
)))
1045 *new_flags
= heap
->flags
;
1046 if ((*new_flags
& mem
->placement
& TTM_PL_MASK_CACHING
) &&
1047 (*new_flags
& mem
->placement
& TTM_PL_MASK_MEM
))
1054 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1055 struct ttm_placement
*placement
,
1062 lockdep_assert_held(&bo
->resv
->lock
.base
);
1064 * Check whether we need to move buffer.
1066 if (!ttm_bo_mem_compat(placement
, &bo
->mem
, &new_flags
)) {
1067 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
,
1073 * Use the access and other non-mapping-related flag bits from
1074 * the compatible memory placement flags to the active flags
1076 ttm_flag_masked(&bo
->mem
.placement
, new_flags
,
1077 ~TTM_PL_MASK_MEMTYPE
);
1080 * We might need to add a TTM.
1082 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1083 ret
= ttm_bo_add_ttm(bo
, true);
1089 EXPORT_SYMBOL(ttm_bo_validate
);
1091 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1092 struct ttm_buffer_object
*bo
,
1094 enum ttm_bo_type type
,
1095 struct ttm_placement
*placement
,
1096 uint32_t page_alignment
,
1098 struct file
*persistent_swap_storage
,
1100 struct sg_table
*sg
,
1101 struct reservation_object
*resv
,
1102 void (*destroy
) (struct ttm_buffer_object
*))
1105 unsigned long num_pages
;
1106 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1109 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1111 pr_err("Out of kernel memory\n");
1119 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1120 if (num_pages
== 0) {
1121 pr_err("Illegal buffer object size\n");
1126 ttm_mem_global_free(mem_glob
, acc_size
);
1129 bo
->destroy
= destroy
;
1131 kref_init(&bo
->kref
);
1132 kref_init(&bo
->list_kref
);
1133 atomic_set(&bo
->cpu_writers
, 0);
1134 INIT_LIST_HEAD(&bo
->lru
);
1135 INIT_LIST_HEAD(&bo
->ddestroy
);
1136 INIT_LIST_HEAD(&bo
->swap
);
1137 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1138 mutex_init(&bo
->wu_mutex
);
1140 bo
->glob
= bdev
->glob
;
1142 bo
->num_pages
= num_pages
;
1143 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1144 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1145 bo
->mem
.num_pages
= bo
->num_pages
;
1146 bo
->mem
.mm_node
= NULL
;
1147 bo
->mem
.page_alignment
= page_alignment
;
1148 bo
->mem
.bus
.io_reserved_vm
= false;
1149 bo
->mem
.bus
.io_reserved_count
= 0;
1151 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1152 bo
->persistent_swap_storage
= persistent_swap_storage
;
1153 bo
->acc_size
= acc_size
;
1157 lockdep_assert_held(&bo
->resv
->lock
.base
);
1159 bo
->resv
= &bo
->ttm_resv
;
1160 reservation_object_init(&bo
->ttm_resv
);
1162 atomic_inc(&bo
->glob
->bo_count
);
1163 drm_vma_node_reset(&bo
->vma_node
);
1166 * For ttm_bo_type_device buffers, allocate
1167 * address space from the device.
1169 if (bo
->type
== ttm_bo_type_device
||
1170 bo
->type
== ttm_bo_type_sg
)
1171 ret
= drm_vma_offset_add(&bdev
->vma_manager
, &bo
->vma_node
,
1174 /* passed reservation objects should already be locked,
1175 * since otherwise lockdep will be angered in radeon.
1178 locked
= ww_mutex_trylock(&bo
->resv
->lock
);
1183 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1186 ttm_bo_unreserve(bo
);
1188 } else if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
1189 spin_lock(&bo
->glob
->lru_lock
);
1190 ttm_bo_add_to_lru(bo
);
1191 spin_unlock(&bo
->glob
->lru_lock
);
1199 EXPORT_SYMBOL(ttm_bo_init
);
1201 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1202 unsigned long bo_size
,
1203 unsigned struct_size
)
1205 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1208 size
+= ttm_round_pot(struct_size
);
1209 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1210 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1213 EXPORT_SYMBOL(ttm_bo_acc_size
);
1215 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1216 unsigned long bo_size
,
1217 unsigned struct_size
)
1219 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1222 size
+= ttm_round_pot(struct_size
);
1223 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1224 size
+= PAGE_ALIGN(npages
* sizeof(dma_addr_t
));
1225 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1228 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1230 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1232 enum ttm_bo_type type
,
1233 struct ttm_placement
*placement
,
1234 uint32_t page_alignment
,
1236 struct file
*persistent_swap_storage
,
1237 struct ttm_buffer_object
**p_bo
)
1239 struct ttm_buffer_object
*bo
;
1243 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1244 if (unlikely(bo
== NULL
))
1247 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1248 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1249 interruptible
, persistent_swap_storage
, acc_size
,
1251 if (likely(ret
== 0))
1256 EXPORT_SYMBOL(ttm_bo_create
);
1258 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1259 unsigned mem_type
, bool allow_errors
)
1261 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1262 struct ttm_bo_global
*glob
= bdev
->glob
;
1266 * Can't use standard list traversal since we're unlocking.
1269 spin_lock(&glob
->lru_lock
);
1270 while (!list_empty(&man
->lru
)) {
1271 spin_unlock(&glob
->lru_lock
);
1272 ret
= ttm_mem_evict_first(bdev
, mem_type
, NULL
, false, false);
1277 pr_err("Cleanup eviction failed\n");
1280 spin_lock(&glob
->lru_lock
);
1282 spin_unlock(&glob
->lru_lock
);
1286 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1288 struct ttm_mem_type_manager
*man
;
1291 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1292 pr_err("Illegal memory type %d\n", mem_type
);
1295 man
= &bdev
->man
[mem_type
];
1297 if (!man
->has_type
) {
1298 pr_err("Trying to take down uninitialized memory manager type %u\n",
1303 man
->use_type
= false;
1304 man
->has_type
= false;
1308 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1310 ret
= (*man
->func
->takedown
)(man
);
1315 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1317 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1319 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1321 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1322 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1326 if (!man
->has_type
) {
1327 pr_err("Memory type %u has not been initialized\n", mem_type
);
1331 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1333 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1335 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1336 unsigned long p_size
)
1339 struct ttm_mem_type_manager
*man
;
1341 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1342 man
= &bdev
->man
[type
];
1343 BUG_ON(man
->has_type
);
1344 man
->io_reserve_fastpath
= true;
1345 man
->use_io_reserve_lru
= false;
1346 mutex_init(&man
->io_reserve_mutex
);
1347 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1349 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1355 if (type
!= TTM_PL_SYSTEM
) {
1356 ret
= (*man
->func
->init
)(man
, p_size
);
1360 man
->has_type
= true;
1361 man
->use_type
= true;
1364 INIT_LIST_HEAD(&man
->lru
);
1368 EXPORT_SYMBOL(ttm_bo_init_mm
);
1370 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1372 struct ttm_bo_global
*glob
=
1373 container_of(kobj
, struct ttm_bo_global
, kobj
);
1375 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1376 __free_page(glob
->dummy_read_page
);
1380 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1382 struct ttm_bo_global
*glob
= ref
->object
;
1384 kobject_del(&glob
->kobj
);
1385 kobject_put(&glob
->kobj
);
1387 EXPORT_SYMBOL(ttm_bo_global_release
);
1389 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1391 struct ttm_bo_global_ref
*bo_ref
=
1392 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1393 struct ttm_bo_global
*glob
= ref
->object
;
1396 mutex_init(&glob
->device_list_mutex
);
1397 spin_lock_init(&glob
->lru_lock
);
1398 glob
->mem_glob
= bo_ref
->mem_glob
;
1399 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1401 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1406 INIT_LIST_HEAD(&glob
->swap_lru
);
1407 INIT_LIST_HEAD(&glob
->device_list
);
1409 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1410 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1411 if (unlikely(ret
!= 0)) {
1412 pr_err("Could not register buffer object swapout\n");
1416 atomic_set(&glob
->bo_count
, 0);
1418 ret
= kobject_init_and_add(
1419 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1420 if (unlikely(ret
!= 0))
1421 kobject_put(&glob
->kobj
);
1424 __free_page(glob
->dummy_read_page
);
1429 EXPORT_SYMBOL(ttm_bo_global_init
);
1432 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1435 unsigned i
= TTM_NUM_MEM_TYPES
;
1436 struct ttm_mem_type_manager
*man
;
1437 struct ttm_bo_global
*glob
= bdev
->glob
;
1440 man
= &bdev
->man
[i
];
1441 if (man
->has_type
) {
1442 man
->use_type
= false;
1443 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1445 pr_err("DRM memory manager type %d is not clean\n",
1448 man
->has_type
= false;
1452 mutex_lock(&glob
->device_list_mutex
);
1453 list_del(&bdev
->device_list
);
1454 mutex_unlock(&glob
->device_list_mutex
);
1456 cancel_delayed_work_sync(&bdev
->wq
);
1458 while (ttm_bo_delayed_delete(bdev
, true))
1461 spin_lock(&glob
->lru_lock
);
1462 if (list_empty(&bdev
->ddestroy
))
1463 TTM_DEBUG("Delayed destroy list was clean\n");
1465 if (list_empty(&bdev
->man
[0].lru
))
1466 TTM_DEBUG("Swap list was clean\n");
1467 spin_unlock(&glob
->lru_lock
);
1469 drm_vma_offset_manager_destroy(&bdev
->vma_manager
);
1473 EXPORT_SYMBOL(ttm_bo_device_release
);
1475 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1476 struct ttm_bo_global
*glob
,
1477 struct ttm_bo_driver
*driver
,
1478 struct address_space
*mapping
,
1479 uint64_t file_page_offset
,
1484 bdev
->driver
= driver
;
1486 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1489 * Initialize the system memory buffer type.
1490 * Other types need to be driver / IOCTL initialized.
1492 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1493 if (unlikely(ret
!= 0))
1496 drm_vma_offset_manager_init(&bdev
->vma_manager
, file_page_offset
,
1498 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1499 INIT_LIST_HEAD(&bdev
->ddestroy
);
1500 bdev
->dev_mapping
= mapping
;
1502 bdev
->need_dma32
= need_dma32
;
1504 mutex_lock(&glob
->device_list_mutex
);
1505 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1506 mutex_unlock(&glob
->device_list_mutex
);
1512 EXPORT_SYMBOL(ttm_bo_device_init
);
1515 * buffer object vm functions.
1518 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1520 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1522 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1523 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1526 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1529 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1535 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1537 struct ttm_bo_device
*bdev
= bo
->bdev
;
1539 drm_vma_node_unmap(&bo
->vma_node
, bdev
->dev_mapping
);
1540 ttm_mem_io_free_vm(bo
);
1543 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1545 struct ttm_bo_device
*bdev
= bo
->bdev
;
1546 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1548 ttm_mem_io_lock(man
, false);
1549 ttm_bo_unmap_virtual_locked(bo
);
1550 ttm_mem_io_unlock(man
);
1554 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1556 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1557 bool lazy
, bool interruptible
, bool no_wait
)
1559 struct reservation_object_list
*fobj
;
1560 struct reservation_object
*resv
;
1562 long timeout
= 15 * HZ
;
1566 fobj
= reservation_object_get_list(resv
);
1567 excl
= reservation_object_get_excl(resv
);
1569 if (!fence_is_signaled(excl
)) {
1573 timeout
= fence_wait_timeout(excl
,
1574 interruptible
, timeout
);
1578 for (i
= 0; fobj
&& timeout
> 0 && i
< fobj
->shared_count
; ++i
) {
1579 struct fence
*fence
;
1580 fence
= rcu_dereference_protected(fobj
->shared
[i
],
1581 reservation_object_held(resv
));
1583 if (!fence_is_signaled(fence
)) {
1587 timeout
= fence_wait_timeout(fence
,
1588 interruptible
, timeout
);
1598 reservation_object_add_excl_fence(resv
, NULL
);
1599 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1602 EXPORT_SYMBOL(ttm_bo_wait
);
1604 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1609 * Using ttm_bo_reserve makes sure the lru lists are updated.
1612 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, NULL
);
1613 if (unlikely(ret
!= 0))
1615 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1616 if (likely(ret
== 0))
1617 atomic_inc(&bo
->cpu_writers
);
1618 ttm_bo_unreserve(bo
);
1621 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1623 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1625 atomic_dec(&bo
->cpu_writers
);
1627 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1630 * A buffer object shrink method that tries to swap out the first
1631 * buffer object on the bo_global::swap_lru list.
1634 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1636 struct ttm_bo_global
*glob
=
1637 container_of(shrink
, struct ttm_bo_global
, shrink
);
1638 struct ttm_buffer_object
*bo
;
1641 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1643 spin_lock(&glob
->lru_lock
);
1644 list_for_each_entry(bo
, &glob
->swap_lru
, swap
) {
1645 ret
= __ttm_bo_reserve(bo
, false, true, false, NULL
);
1651 spin_unlock(&glob
->lru_lock
);
1655 kref_get(&bo
->list_kref
);
1657 if (!list_empty(&bo
->ddestroy
)) {
1658 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, false, false);
1659 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1663 put_count
= ttm_bo_del_from_lru(bo
);
1664 spin_unlock(&glob
->lru_lock
);
1666 ttm_bo_list_ref_sub(bo
, put_count
, true);
1669 * Wait for GPU, then move to system cached.
1672 ret
= ttm_bo_wait(bo
, false, false, false);
1674 if (unlikely(ret
!= 0))
1677 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1678 struct ttm_mem_reg evict_mem
;
1680 evict_mem
= bo
->mem
;
1681 evict_mem
.mm_node
= NULL
;
1682 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1683 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1685 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1687 if (unlikely(ret
!= 0))
1691 ttm_bo_unmap_virtual(bo
);
1694 * Swap out. Buffer will be swapped in again as soon as
1695 * anyone tries to access a ttm page.
1698 if (bo
->bdev
->driver
->swap_notify
)
1699 bo
->bdev
->driver
->swap_notify(bo
);
1701 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1706 * Unreserve without putting on LRU to avoid swapping out an
1707 * already swapped buffer.
1710 __ttm_bo_unreserve(bo
);
1711 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1715 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1717 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1720 EXPORT_SYMBOL(ttm_bo_swapout_all
);
1723 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1726 * @bo: Pointer to buffer
1728 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
)
1733 * In the absense of a wait_unlocked API,
1734 * Use the bo::wu_mutex to avoid triggering livelocks due to
1735 * concurrent use of this function. Note that this use of
1736 * bo::wu_mutex can go away if we change locking order to
1737 * mmap_sem -> bo::reserve.
1739 ret
= mutex_lock_interruptible(&bo
->wu_mutex
);
1740 if (unlikely(ret
!= 0))
1741 return -ERESTARTSYS
;
1742 if (!ww_mutex_is_locked(&bo
->resv
->lock
))
1744 ret
= __ttm_bo_reserve(bo
, true, false, false, NULL
);
1745 if (unlikely(ret
!= 0))
1747 __ttm_bo_unreserve(bo
);
1750 mutex_unlock(&bo
->wu_mutex
);