1 /**************************************************************************
3 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
31 #define pr_fmt(fmt) "[TTM] " fmt
33 #include <drm/ttm/ttm_module.h>
34 #include <drm/ttm/ttm_bo_driver.h>
35 #include <drm/ttm/ttm_placement.h>
36 #include <linux/jiffies.h>
37 #include <linux/slab.h>
38 #include <linux/sched.h>
40 #include <linux/file.h>
41 #include <linux/module.h>
42 #include <linux/atomic.h>
44 #define TTM_ASSERT_LOCKED(param)
45 #define TTM_DEBUG(fmt, arg...)
46 #define TTM_BO_HASH_ORDER 13
48 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
);
49 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
);
50 static void ttm_bo_global_kobj_release(struct kobject
*kobj
);
52 static struct attribute ttm_bo_count
= {
57 static inline int ttm_mem_type_from_flags(uint32_t flags
, uint32_t *mem_type
)
61 for (i
= 0; i
<= TTM_PL_PRIV5
; i
++)
62 if (flags
& (1 << i
)) {
69 static void ttm_mem_type_debug(struct ttm_bo_device
*bdev
, int mem_type
)
71 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
73 pr_err(" has_type: %d\n", man
->has_type
);
74 pr_err(" use_type: %d\n", man
->use_type
);
75 pr_err(" flags: 0x%08X\n", man
->flags
);
76 pr_err(" gpu_offset: 0x%08lX\n", man
->gpu_offset
);
77 pr_err(" size: %llu\n", man
->size
);
78 pr_err(" available_caching: 0x%08X\n", man
->available_caching
);
79 pr_err(" default_caching: 0x%08X\n", man
->default_caching
);
80 if (mem_type
!= TTM_PL_SYSTEM
)
81 (*man
->func
->debug
)(man
, TTM_PFX
);
84 static void ttm_bo_mem_space_debug(struct ttm_buffer_object
*bo
,
85 struct ttm_placement
*placement
)
89 pr_err("No space for %p (%lu pages, %luK, %luM)\n",
90 bo
, bo
->mem
.num_pages
, bo
->mem
.size
>> 10,
92 for (i
= 0; i
< placement
->num_placement
; i
++) {
93 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
97 pr_err(" placement[%d]=0x%08X (%d)\n",
98 i
, placement
->placement
[i
], mem_type
);
99 ttm_mem_type_debug(bo
->bdev
, mem_type
);
103 static ssize_t
ttm_bo_global_show(struct kobject
*kobj
,
104 struct attribute
*attr
,
107 struct ttm_bo_global
*glob
=
108 container_of(kobj
, struct ttm_bo_global
, kobj
);
110 return snprintf(buffer
, PAGE_SIZE
, "%lu\n",
111 (unsigned long) atomic_read(&glob
->bo_count
));
114 static struct attribute
*ttm_bo_global_attrs
[] = {
119 static const struct sysfs_ops ttm_bo_global_ops
= {
120 .show
= &ttm_bo_global_show
123 static struct kobj_type ttm_bo_glob_kobj_type
= {
124 .release
= &ttm_bo_global_kobj_release
,
125 .sysfs_ops
= &ttm_bo_global_ops
,
126 .default_attrs
= ttm_bo_global_attrs
130 static inline uint32_t ttm_bo_type_flags(unsigned type
)
135 static void ttm_bo_release_list(struct kref
*list_kref
)
137 struct ttm_buffer_object
*bo
=
138 container_of(list_kref
, struct ttm_buffer_object
, list_kref
);
139 struct ttm_bo_device
*bdev
= bo
->bdev
;
140 size_t acc_size
= bo
->acc_size
;
142 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
143 BUG_ON(atomic_read(&bo
->kref
.refcount
));
144 BUG_ON(atomic_read(&bo
->cpu_writers
));
145 BUG_ON(bo
->sync_obj
!= NULL
);
146 BUG_ON(bo
->mem
.mm_node
!= NULL
);
147 BUG_ON(!list_empty(&bo
->lru
));
148 BUG_ON(!list_empty(&bo
->ddestroy
));
151 ttm_tt_destroy(bo
->ttm
);
152 atomic_dec(&bo
->glob
->bo_count
);
158 ttm_mem_global_free(bdev
->glob
->mem_glob
, acc_size
);
161 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
, bool interruptible
)
164 return wait_event_interruptible(bo
->event_queue
,
165 !ttm_bo_is_reserved(bo
));
167 wait_event(bo
->event_queue
, !ttm_bo_is_reserved(bo
));
171 EXPORT_SYMBOL(ttm_bo_wait_unreserved
);
173 void ttm_bo_add_to_lru(struct ttm_buffer_object
*bo
)
175 struct ttm_bo_device
*bdev
= bo
->bdev
;
176 struct ttm_mem_type_manager
*man
;
178 BUG_ON(!ttm_bo_is_reserved(bo
));
180 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
182 BUG_ON(!list_empty(&bo
->lru
));
184 man
= &bdev
->man
[bo
->mem
.mem_type
];
185 list_add_tail(&bo
->lru
, &man
->lru
);
186 kref_get(&bo
->list_kref
);
188 if (bo
->ttm
!= NULL
) {
189 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
190 kref_get(&bo
->list_kref
);
195 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
199 if (!list_empty(&bo
->swap
)) {
200 list_del_init(&bo
->swap
);
203 if (!list_empty(&bo
->lru
)) {
204 list_del_init(&bo
->lru
);
209 * TODO: Add a driver hook to delete from
210 * driver-specific LRU's here.
216 int ttm_bo_reserve_locked(struct ttm_buffer_object
*bo
,
218 bool no_wait
, bool use_sequence
, uint32_t sequence
)
220 struct ttm_bo_global
*glob
= bo
->glob
;
223 while (unlikely(atomic_cmpxchg(&bo
->reserved
, 0, 1) != 0)) {
225 * Deadlock avoidance for multi-bo reserving.
227 if (use_sequence
&& bo
->seq_valid
) {
229 * We've already reserved this one.
231 if (unlikely(sequence
== bo
->val_seq
))
234 * Already reserved by a thread that will not back
235 * off for us. We need to back off.
237 if (unlikely(sequence
- bo
->val_seq
< (1 << 31)))
244 spin_unlock(&glob
->lru_lock
);
245 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
246 spin_lock(&glob
->lru_lock
);
254 * Wake up waiters that may need to recheck for deadlock,
255 * if we decreased the sequence number.
257 if (unlikely((bo
->val_seq
- sequence
< (1 << 31))
259 wake_up_all(&bo
->event_queue
);
261 bo
->val_seq
= sequence
;
262 bo
->seq_valid
= true;
264 bo
->seq_valid
= false;
269 EXPORT_SYMBOL(ttm_bo_reserve
);
271 static void ttm_bo_ref_bug(struct kref
*list_kref
)
276 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
279 kref_sub(&bo
->list_kref
, count
,
280 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
283 int ttm_bo_reserve(struct ttm_buffer_object
*bo
,
285 bool no_wait
, bool use_sequence
, uint32_t sequence
)
287 struct ttm_bo_global
*glob
= bo
->glob
;
291 spin_lock(&glob
->lru_lock
);
292 ret
= ttm_bo_reserve_locked(bo
, interruptible
, no_wait
, use_sequence
,
294 if (likely(ret
== 0))
295 put_count
= ttm_bo_del_from_lru(bo
);
296 spin_unlock(&glob
->lru_lock
);
298 ttm_bo_list_ref_sub(bo
, put_count
, true);
303 void ttm_bo_unreserve_locked(struct ttm_buffer_object
*bo
)
305 ttm_bo_add_to_lru(bo
);
306 atomic_set(&bo
->reserved
, 0);
307 wake_up_all(&bo
->event_queue
);
310 void ttm_bo_unreserve(struct ttm_buffer_object
*bo
)
312 struct ttm_bo_global
*glob
= bo
->glob
;
314 spin_lock(&glob
->lru_lock
);
315 ttm_bo_unreserve_locked(bo
);
316 spin_unlock(&glob
->lru_lock
);
318 EXPORT_SYMBOL(ttm_bo_unreserve
);
321 * Call bo->mutex locked.
323 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
325 struct ttm_bo_device
*bdev
= bo
->bdev
;
326 struct ttm_bo_global
*glob
= bo
->glob
;
328 uint32_t page_flags
= 0;
330 TTM_ASSERT_LOCKED(&bo
->mutex
);
333 if (bdev
->need_dma32
)
334 page_flags
|= TTM_PAGE_FLAG_DMA32
;
337 case ttm_bo_type_device
:
339 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
340 case ttm_bo_type_kernel
:
341 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
342 page_flags
, glob
->dummy_read_page
);
343 if (unlikely(bo
->ttm
== NULL
))
347 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
348 page_flags
| TTM_PAGE_FLAG_SG
,
349 glob
->dummy_read_page
);
350 if (unlikely(bo
->ttm
== NULL
)) {
354 bo
->ttm
->sg
= bo
->sg
;
357 pr_err("Illegal buffer object type\n");
365 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
366 struct ttm_mem_reg
*mem
,
367 bool evict
, bool interruptible
,
368 bool no_wait_reserve
, bool no_wait_gpu
)
370 struct ttm_bo_device
*bdev
= bo
->bdev
;
371 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
372 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
373 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
374 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
377 if (old_is_pci
|| new_is_pci
||
378 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
379 ret
= ttm_mem_io_lock(old_man
, true);
380 if (unlikely(ret
!= 0))
382 ttm_bo_unmap_virtual_locked(bo
);
383 ttm_mem_io_unlock(old_man
);
387 * Create and bind a ttm if required.
390 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
391 if (bo
->ttm
== NULL
) {
392 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
393 ret
= ttm_bo_add_ttm(bo
, zero
);
398 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
402 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
403 ret
= ttm_tt_bind(bo
->ttm
, mem
);
408 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
409 if (bdev
->driver
->move_notify
)
410 bdev
->driver
->move_notify(bo
, mem
);
417 if (bdev
->driver
->move_notify
)
418 bdev
->driver
->move_notify(bo
, mem
);
420 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
421 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
422 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_reserve
, no_wait_gpu
, mem
);
423 else if (bdev
->driver
->move
)
424 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
425 no_wait_reserve
, no_wait_gpu
, mem
);
427 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_reserve
, no_wait_gpu
, mem
);
430 if (bdev
->driver
->move_notify
) {
431 struct ttm_mem_reg tmp_mem
= *mem
;
434 bdev
->driver
->move_notify(bo
, mem
);
443 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
445 pr_err("Can not flush read caches\n");
449 if (bo
->mem
.mm_node
) {
450 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
451 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
452 bo
->cur_placement
= bo
->mem
.placement
;
459 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
460 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
461 ttm_tt_unbind(bo
->ttm
);
462 ttm_tt_destroy(bo
->ttm
);
471 * Will release GPU memory type usage on destruction.
472 * This is the place to put in driver specific hooks to release
473 * driver private resources.
474 * Will release the bo::reserved lock.
477 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
479 if (bo
->bdev
->driver
->move_notify
)
480 bo
->bdev
->driver
->move_notify(bo
, NULL
);
483 ttm_tt_unbind(bo
->ttm
);
484 ttm_tt_destroy(bo
->ttm
);
487 ttm_bo_mem_put(bo
, &bo
->mem
);
489 atomic_set(&bo
->reserved
, 0);
492 * Make processes trying to reserve really pick it up.
494 smp_mb__after_atomic_dec();
495 wake_up_all(&bo
->event_queue
);
498 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
500 struct ttm_bo_device
*bdev
= bo
->bdev
;
501 struct ttm_bo_global
*glob
= bo
->glob
;
502 struct ttm_bo_driver
*driver
;
503 void *sync_obj
= NULL
;
508 spin_lock(&bdev
->fence_lock
);
509 (void) ttm_bo_wait(bo
, false, false, true);
512 spin_lock(&glob
->lru_lock
);
515 * Lock inversion between bo:reserve and bdev::fence_lock here,
516 * but that's OK, since we're only trylocking.
519 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
521 if (unlikely(ret
== -EBUSY
))
524 spin_unlock(&bdev
->fence_lock
);
525 put_count
= ttm_bo_del_from_lru(bo
);
527 spin_unlock(&glob
->lru_lock
);
528 ttm_bo_cleanup_memtype_use(bo
);
530 ttm_bo_list_ref_sub(bo
, put_count
, true);
534 spin_lock(&glob
->lru_lock
);
537 driver
= bdev
->driver
;
539 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
540 sync_obj_arg
= bo
->sync_obj_arg
;
542 kref_get(&bo
->list_kref
);
543 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
544 spin_unlock(&glob
->lru_lock
);
545 spin_unlock(&bdev
->fence_lock
);
548 driver
->sync_obj_flush(sync_obj
, sync_obj_arg
);
549 driver
->sync_obj_unref(&sync_obj
);
551 schedule_delayed_work(&bdev
->wq
,
552 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
556 * function ttm_bo_cleanup_refs
557 * If bo idle, remove from delayed- and lru lists, and unref.
558 * If not idle, do nothing.
560 * @interruptible Any sleeps should occur interruptibly.
561 * @no_wait_reserve Never wait for reserve. Return -EBUSY instead.
562 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
565 static int ttm_bo_cleanup_refs(struct ttm_buffer_object
*bo
,
567 bool no_wait_reserve
,
570 struct ttm_bo_device
*bdev
= bo
->bdev
;
571 struct ttm_bo_global
*glob
= bo
->glob
;
576 spin_lock(&bdev
->fence_lock
);
577 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
578 spin_unlock(&bdev
->fence_lock
);
580 if (unlikely(ret
!= 0))
584 spin_lock(&glob
->lru_lock
);
586 if (unlikely(list_empty(&bo
->ddestroy
))) {
587 spin_unlock(&glob
->lru_lock
);
591 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
593 if (unlikely(ret
== -EBUSY
)) {
594 spin_unlock(&glob
->lru_lock
);
595 if (likely(!no_wait_reserve
))
596 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
597 if (unlikely(ret
!= 0))
606 * We can re-check for sync object without taking
607 * the bo::lock since setting the sync object requires
608 * also bo::reserved. A busy object at this point may
609 * be caused by another thread recently starting an accelerated
613 if (unlikely(bo
->sync_obj
)) {
614 atomic_set(&bo
->reserved
, 0);
615 wake_up_all(&bo
->event_queue
);
616 spin_unlock(&glob
->lru_lock
);
620 put_count
= ttm_bo_del_from_lru(bo
);
621 list_del_init(&bo
->ddestroy
);
624 spin_unlock(&glob
->lru_lock
);
625 ttm_bo_cleanup_memtype_use(bo
);
627 ttm_bo_list_ref_sub(bo
, put_count
, true);
633 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
634 * encountered buffers.
637 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
639 struct ttm_bo_global
*glob
= bdev
->glob
;
640 struct ttm_buffer_object
*entry
= NULL
;
643 spin_lock(&glob
->lru_lock
);
644 if (list_empty(&bdev
->ddestroy
))
647 entry
= list_first_entry(&bdev
->ddestroy
,
648 struct ttm_buffer_object
, ddestroy
);
649 kref_get(&entry
->list_kref
);
652 struct ttm_buffer_object
*nentry
= NULL
;
654 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
655 nentry
= list_first_entry(&entry
->ddestroy
,
656 struct ttm_buffer_object
, ddestroy
);
657 kref_get(&nentry
->list_kref
);
660 spin_unlock(&glob
->lru_lock
);
661 ret
= ttm_bo_cleanup_refs(entry
, false, !remove_all
,
663 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
669 spin_lock(&glob
->lru_lock
);
670 if (list_empty(&entry
->ddestroy
))
675 spin_unlock(&glob
->lru_lock
);
678 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
682 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
684 struct ttm_bo_device
*bdev
=
685 container_of(work
, struct ttm_bo_device
, wq
.work
);
687 if (ttm_bo_delayed_delete(bdev
, false)) {
688 schedule_delayed_work(&bdev
->wq
,
689 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
693 static void ttm_bo_release(struct kref
*kref
)
695 struct ttm_buffer_object
*bo
=
696 container_of(kref
, struct ttm_buffer_object
, kref
);
697 struct ttm_bo_device
*bdev
= bo
->bdev
;
698 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
700 if (likely(bo
->vm_node
!= NULL
)) {
701 rb_erase(&bo
->vm_rb
, &bdev
->addr_space_rb
);
702 drm_mm_put_block(bo
->vm_node
);
705 write_unlock(&bdev
->vm_lock
);
706 ttm_mem_io_lock(man
, false);
707 ttm_mem_io_free_vm(bo
);
708 ttm_mem_io_unlock(man
);
709 ttm_bo_cleanup_refs_or_queue(bo
);
710 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
711 write_lock(&bdev
->vm_lock
);
714 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
716 struct ttm_buffer_object
*bo
= *p_bo
;
717 struct ttm_bo_device
*bdev
= bo
->bdev
;
720 write_lock(&bdev
->vm_lock
);
721 kref_put(&bo
->kref
, ttm_bo_release
);
722 write_unlock(&bdev
->vm_lock
);
724 EXPORT_SYMBOL(ttm_bo_unref
);
726 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
728 return cancel_delayed_work_sync(&bdev
->wq
);
730 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
732 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
735 schedule_delayed_work(&bdev
->wq
,
736 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
738 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
740 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
741 bool no_wait_reserve
, bool no_wait_gpu
)
743 struct ttm_bo_device
*bdev
= bo
->bdev
;
744 struct ttm_mem_reg evict_mem
;
745 struct ttm_placement placement
;
748 spin_lock(&bdev
->fence_lock
);
749 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
750 spin_unlock(&bdev
->fence_lock
);
752 if (unlikely(ret
!= 0)) {
753 if (ret
!= -ERESTARTSYS
) {
754 pr_err("Failed to expire sync object before buffer eviction\n");
759 BUG_ON(!ttm_bo_is_reserved(bo
));
762 evict_mem
.mm_node
= NULL
;
763 evict_mem
.bus
.io_reserved_vm
= false;
764 evict_mem
.bus
.io_reserved_count
= 0;
768 placement
.num_placement
= 0;
769 placement
.num_busy_placement
= 0;
770 bdev
->driver
->evict_flags(bo
, &placement
);
771 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
772 no_wait_reserve
, no_wait_gpu
);
774 if (ret
!= -ERESTARTSYS
) {
775 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
777 ttm_bo_mem_space_debug(bo
, &placement
);
782 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
783 no_wait_reserve
, no_wait_gpu
);
785 if (ret
!= -ERESTARTSYS
)
786 pr_err("Buffer eviction failed\n");
787 ttm_bo_mem_put(bo
, &evict_mem
);
795 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
797 bool interruptible
, bool no_wait_reserve
,
800 struct ttm_bo_global
*glob
= bdev
->glob
;
801 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
802 struct ttm_buffer_object
*bo
;
803 int ret
, put_count
= 0;
806 spin_lock(&glob
->lru_lock
);
807 if (list_empty(&man
->lru
)) {
808 spin_unlock(&glob
->lru_lock
);
812 bo
= list_first_entry(&man
->lru
, struct ttm_buffer_object
, lru
);
813 kref_get(&bo
->list_kref
);
815 if (!list_empty(&bo
->ddestroy
)) {
816 spin_unlock(&glob
->lru_lock
);
817 ret
= ttm_bo_cleanup_refs(bo
, interruptible
,
818 no_wait_reserve
, no_wait_gpu
);
819 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
824 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
826 if (unlikely(ret
== -EBUSY
)) {
827 spin_unlock(&glob
->lru_lock
);
828 if (likely(!no_wait_reserve
))
829 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
831 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
834 * We *need* to retry after releasing the lru lock.
837 if (unlikely(ret
!= 0))
842 put_count
= ttm_bo_del_from_lru(bo
);
843 spin_unlock(&glob
->lru_lock
);
847 ttm_bo_list_ref_sub(bo
, put_count
, true);
849 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_reserve
, no_wait_gpu
);
850 ttm_bo_unreserve(bo
);
852 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
856 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
858 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
861 (*man
->func
->put_node
)(man
, mem
);
863 EXPORT_SYMBOL(ttm_bo_mem_put
);
866 * Repeatedly evict memory from the LRU for @mem_type until we create enough
867 * space, or we've evicted everything and there isn't enough space.
869 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
871 struct ttm_placement
*placement
,
872 struct ttm_mem_reg
*mem
,
874 bool no_wait_reserve
,
877 struct ttm_bo_device
*bdev
= bo
->bdev
;
878 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
882 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
883 if (unlikely(ret
!= 0))
887 ret
= ttm_mem_evict_first(bdev
, mem_type
, interruptible
,
888 no_wait_reserve
, no_wait_gpu
);
889 if (unlikely(ret
!= 0))
892 if (mem
->mm_node
== NULL
)
894 mem
->mem_type
= mem_type
;
898 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
899 uint32_t cur_placement
,
900 uint32_t proposed_placement
)
902 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
903 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
906 * Keep current caching if possible.
909 if ((cur_placement
& caching
) != 0)
910 result
|= (cur_placement
& caching
);
911 else if ((man
->default_caching
& caching
) != 0)
912 result
|= man
->default_caching
;
913 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
914 result
|= TTM_PL_FLAG_CACHED
;
915 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
916 result
|= TTM_PL_FLAG_WC
;
917 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
918 result
|= TTM_PL_FLAG_UNCACHED
;
923 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
925 uint32_t proposed_placement
,
926 uint32_t *masked_placement
)
928 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
930 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
933 if ((proposed_placement
& man
->available_caching
) == 0)
936 cur_flags
|= (proposed_placement
& man
->available_caching
);
938 *masked_placement
= cur_flags
;
943 * Creates space for memory region @mem according to its type.
945 * This function first searches for free space in compatible memory types in
946 * the priority order defined by the driver. If free space isn't found, then
947 * ttm_bo_mem_force_space is attempted in priority order to evict and find
950 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
951 struct ttm_placement
*placement
,
952 struct ttm_mem_reg
*mem
,
953 bool interruptible
, bool no_wait_reserve
,
956 struct ttm_bo_device
*bdev
= bo
->bdev
;
957 struct ttm_mem_type_manager
*man
;
958 uint32_t mem_type
= TTM_PL_SYSTEM
;
959 uint32_t cur_flags
= 0;
960 bool type_found
= false;
961 bool type_ok
= false;
962 bool has_erestartsys
= false;
966 for (i
= 0; i
< placement
->num_placement
; ++i
) {
967 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
971 man
= &bdev
->man
[mem_type
];
973 type_ok
= ttm_bo_mt_compatible(man
,
975 placement
->placement
[i
],
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
, placement
->placement
[i
],
988 ~TTM_PL_MASK_MEMTYPE
);
990 if (mem_type
== TTM_PL_SYSTEM
)
993 if (man
->has_type
&& man
->use_type
) {
995 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
1003 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
1004 mem
->mem_type
= mem_type
;
1005 mem
->placement
= cur_flags
;
1012 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
1013 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
1017 man
= &bdev
->man
[mem_type
];
1020 if (!ttm_bo_mt_compatible(man
,
1022 placement
->busy_placement
[i
],
1026 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
1029 * Use the access and other non-mapping-related flag bits from
1030 * the memory placement flags to the current flags
1032 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
1033 ~TTM_PL_MASK_MEMTYPE
);
1036 if (mem_type
== TTM_PL_SYSTEM
) {
1037 mem
->mem_type
= mem_type
;
1038 mem
->placement
= cur_flags
;
1039 mem
->mm_node
= NULL
;
1043 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
1044 interruptible
, no_wait_reserve
, no_wait_gpu
);
1045 if (ret
== 0 && mem
->mm_node
) {
1046 mem
->placement
= cur_flags
;
1049 if (ret
== -ERESTARTSYS
)
1050 has_erestartsys
= true;
1052 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
1055 EXPORT_SYMBOL(ttm_bo_mem_space
);
1057 int ttm_bo_wait_cpu(struct ttm_buffer_object
*bo
, bool no_wait
)
1059 if ((atomic_read(&bo
->cpu_writers
) > 0) && no_wait
)
1062 return wait_event_interruptible(bo
->event_queue
,
1063 atomic_read(&bo
->cpu_writers
) == 0);
1065 EXPORT_SYMBOL(ttm_bo_wait_cpu
);
1067 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
1068 struct ttm_placement
*placement
,
1069 bool interruptible
, bool no_wait_reserve
,
1073 struct ttm_mem_reg mem
;
1074 struct ttm_bo_device
*bdev
= bo
->bdev
;
1076 BUG_ON(!ttm_bo_is_reserved(bo
));
1079 * FIXME: It's possible to pipeline buffer moves.
1080 * Have the driver move function wait for idle when necessary,
1081 * instead of doing it here.
1083 spin_lock(&bdev
->fence_lock
);
1084 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
1085 spin_unlock(&bdev
->fence_lock
);
1088 mem
.num_pages
= bo
->num_pages
;
1089 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1090 mem
.page_alignment
= bo
->mem
.page_alignment
;
1091 mem
.bus
.io_reserved_vm
= false;
1092 mem
.bus
.io_reserved_count
= 0;
1094 * Determine where to move the buffer.
1096 ret
= ttm_bo_mem_space(bo
, placement
, &mem
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1099 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false, interruptible
, no_wait_reserve
, no_wait_gpu
);
1101 if (ret
&& mem
.mm_node
)
1102 ttm_bo_mem_put(bo
, &mem
);
1106 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
1107 struct ttm_mem_reg
*mem
)
1111 if (mem
->mm_node
&& placement
->lpfn
!= 0 &&
1112 (mem
->start
< placement
->fpfn
||
1113 mem
->start
+ mem
->num_pages
> placement
->lpfn
))
1116 for (i
= 0; i
< placement
->num_placement
; i
++) {
1117 if ((placement
->placement
[i
] & mem
->placement
&
1118 TTM_PL_MASK_CACHING
) &&
1119 (placement
->placement
[i
] & mem
->placement
&
1126 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1127 struct ttm_placement
*placement
,
1128 bool interruptible
, bool no_wait_reserve
,
1133 BUG_ON(!ttm_bo_is_reserved(bo
));
1134 /* Check that range is valid */
1135 if (placement
->lpfn
|| placement
->fpfn
)
1136 if (placement
->fpfn
> placement
->lpfn
||
1137 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1140 * Check whether we need to move buffer.
1142 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1144 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1149 * Use the access and other non-mapping-related flag bits from
1150 * the compatible memory placement flags to the active flags
1152 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1153 ~TTM_PL_MASK_MEMTYPE
);
1156 * We might need to add a TTM.
1158 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1159 ret
= ttm_bo_add_ttm(bo
, true);
1165 EXPORT_SYMBOL(ttm_bo_validate
);
1167 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1168 struct ttm_placement
*placement
)
1170 BUG_ON((placement
->fpfn
|| placement
->lpfn
) &&
1171 (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)));
1176 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1177 struct ttm_buffer_object
*bo
,
1179 enum ttm_bo_type type
,
1180 struct ttm_placement
*placement
,
1181 uint32_t page_alignment
,
1183 struct file
*persistent_swap_storage
,
1185 struct sg_table
*sg
,
1186 void (*destroy
) (struct ttm_buffer_object
*))
1189 unsigned long num_pages
;
1190 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1192 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1194 pr_err("Out of kernel memory\n");
1202 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1203 if (num_pages
== 0) {
1204 pr_err("Illegal buffer object size\n");
1209 ttm_mem_global_free(mem_glob
, acc_size
);
1212 bo
->destroy
= destroy
;
1214 kref_init(&bo
->kref
);
1215 kref_init(&bo
->list_kref
);
1216 atomic_set(&bo
->cpu_writers
, 0);
1217 atomic_set(&bo
->reserved
, 1);
1218 init_waitqueue_head(&bo
->event_queue
);
1219 INIT_LIST_HEAD(&bo
->lru
);
1220 INIT_LIST_HEAD(&bo
->ddestroy
);
1221 INIT_LIST_HEAD(&bo
->swap
);
1222 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1224 bo
->glob
= bdev
->glob
;
1226 bo
->num_pages
= num_pages
;
1227 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1228 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1229 bo
->mem
.num_pages
= bo
->num_pages
;
1230 bo
->mem
.mm_node
= NULL
;
1231 bo
->mem
.page_alignment
= page_alignment
;
1232 bo
->mem
.bus
.io_reserved_vm
= false;
1233 bo
->mem
.bus
.io_reserved_count
= 0;
1235 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1236 bo
->seq_valid
= false;
1237 bo
->persistent_swap_storage
= persistent_swap_storage
;
1238 bo
->acc_size
= acc_size
;
1240 atomic_inc(&bo
->glob
->bo_count
);
1242 ret
= ttm_bo_check_placement(bo
, placement
);
1243 if (unlikely(ret
!= 0))
1247 * For ttm_bo_type_device buffers, allocate
1248 * address space from the device.
1250 if (bo
->type
== ttm_bo_type_device
||
1251 bo
->type
== ttm_bo_type_sg
) {
1252 ret
= ttm_bo_setup_vm(bo
);
1257 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false, false);
1261 ttm_bo_unreserve(bo
);
1265 ttm_bo_unreserve(bo
);
1270 EXPORT_SYMBOL(ttm_bo_init
);
1272 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1273 unsigned long bo_size
,
1274 unsigned struct_size
)
1276 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1279 size
+= ttm_round_pot(struct_size
);
1280 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1281 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1284 EXPORT_SYMBOL(ttm_bo_acc_size
);
1286 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1287 unsigned long bo_size
,
1288 unsigned struct_size
)
1290 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1293 size
+= ttm_round_pot(struct_size
);
1294 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1295 size
+= PAGE_ALIGN(npages
* sizeof(dma_addr_t
));
1296 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1299 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1301 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1303 enum ttm_bo_type type
,
1304 struct ttm_placement
*placement
,
1305 uint32_t page_alignment
,
1307 struct file
*persistent_swap_storage
,
1308 struct ttm_buffer_object
**p_bo
)
1310 struct ttm_buffer_object
*bo
;
1314 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1315 if (unlikely(bo
== NULL
))
1318 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1319 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1320 interruptible
, persistent_swap_storage
, acc_size
,
1322 if (likely(ret
== 0))
1327 EXPORT_SYMBOL(ttm_bo_create
);
1329 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1330 unsigned mem_type
, bool allow_errors
)
1332 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1333 struct ttm_bo_global
*glob
= bdev
->glob
;
1337 * Can't use standard list traversal since we're unlocking.
1340 spin_lock(&glob
->lru_lock
);
1341 while (!list_empty(&man
->lru
)) {
1342 spin_unlock(&glob
->lru_lock
);
1343 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false, false);
1348 pr_err("Cleanup eviction failed\n");
1351 spin_lock(&glob
->lru_lock
);
1353 spin_unlock(&glob
->lru_lock
);
1357 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1359 struct ttm_mem_type_manager
*man
;
1362 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1363 pr_err("Illegal memory type %d\n", mem_type
);
1366 man
= &bdev
->man
[mem_type
];
1368 if (!man
->has_type
) {
1369 pr_err("Trying to take down uninitialized memory manager type %u\n",
1374 man
->use_type
= false;
1375 man
->has_type
= false;
1379 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1381 ret
= (*man
->func
->takedown
)(man
);
1386 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1388 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1390 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1392 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1393 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1397 if (!man
->has_type
) {
1398 pr_err("Memory type %u has not been initialized\n", mem_type
);
1402 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1404 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1406 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1407 unsigned long p_size
)
1410 struct ttm_mem_type_manager
*man
;
1412 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1413 man
= &bdev
->man
[type
];
1414 BUG_ON(man
->has_type
);
1415 man
->io_reserve_fastpath
= true;
1416 man
->use_io_reserve_lru
= false;
1417 mutex_init(&man
->io_reserve_mutex
);
1418 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1420 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1426 if (type
!= TTM_PL_SYSTEM
) {
1427 ret
= (*man
->func
->init
)(man
, p_size
);
1431 man
->has_type
= true;
1432 man
->use_type
= true;
1435 INIT_LIST_HEAD(&man
->lru
);
1439 EXPORT_SYMBOL(ttm_bo_init_mm
);
1441 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1443 struct ttm_bo_global
*glob
=
1444 container_of(kobj
, struct ttm_bo_global
, kobj
);
1446 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1447 __free_page(glob
->dummy_read_page
);
1451 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1453 struct ttm_bo_global
*glob
= ref
->object
;
1455 kobject_del(&glob
->kobj
);
1456 kobject_put(&glob
->kobj
);
1458 EXPORT_SYMBOL(ttm_bo_global_release
);
1460 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1462 struct ttm_bo_global_ref
*bo_ref
=
1463 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1464 struct ttm_bo_global
*glob
= ref
->object
;
1467 mutex_init(&glob
->device_list_mutex
);
1468 spin_lock_init(&glob
->lru_lock
);
1469 glob
->mem_glob
= bo_ref
->mem_glob
;
1470 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1472 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1477 INIT_LIST_HEAD(&glob
->swap_lru
);
1478 INIT_LIST_HEAD(&glob
->device_list
);
1480 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1481 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1482 if (unlikely(ret
!= 0)) {
1483 pr_err("Could not register buffer object swapout\n");
1487 atomic_set(&glob
->bo_count
, 0);
1489 ret
= kobject_init_and_add(
1490 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1491 if (unlikely(ret
!= 0))
1492 kobject_put(&glob
->kobj
);
1495 __free_page(glob
->dummy_read_page
);
1500 EXPORT_SYMBOL(ttm_bo_global_init
);
1503 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1506 unsigned i
= TTM_NUM_MEM_TYPES
;
1507 struct ttm_mem_type_manager
*man
;
1508 struct ttm_bo_global
*glob
= bdev
->glob
;
1511 man
= &bdev
->man
[i
];
1512 if (man
->has_type
) {
1513 man
->use_type
= false;
1514 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1516 pr_err("DRM memory manager type %d is not clean\n",
1519 man
->has_type
= false;
1523 mutex_lock(&glob
->device_list_mutex
);
1524 list_del(&bdev
->device_list
);
1525 mutex_unlock(&glob
->device_list_mutex
);
1527 cancel_delayed_work_sync(&bdev
->wq
);
1529 while (ttm_bo_delayed_delete(bdev
, true))
1532 spin_lock(&glob
->lru_lock
);
1533 if (list_empty(&bdev
->ddestroy
))
1534 TTM_DEBUG("Delayed destroy list was clean\n");
1536 if (list_empty(&bdev
->man
[0].lru
))
1537 TTM_DEBUG("Swap list was clean\n");
1538 spin_unlock(&glob
->lru_lock
);
1540 BUG_ON(!drm_mm_clean(&bdev
->addr_space_mm
));
1541 write_lock(&bdev
->vm_lock
);
1542 drm_mm_takedown(&bdev
->addr_space_mm
);
1543 write_unlock(&bdev
->vm_lock
);
1547 EXPORT_SYMBOL(ttm_bo_device_release
);
1549 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1550 struct ttm_bo_global
*glob
,
1551 struct ttm_bo_driver
*driver
,
1552 uint64_t file_page_offset
,
1557 rwlock_init(&bdev
->vm_lock
);
1558 bdev
->driver
= driver
;
1560 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1563 * Initialize the system memory buffer type.
1564 * Other types need to be driver / IOCTL initialized.
1566 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1567 if (unlikely(ret
!= 0))
1570 bdev
->addr_space_rb
= RB_ROOT
;
1571 ret
= drm_mm_init(&bdev
->addr_space_mm
, file_page_offset
, 0x10000000);
1572 if (unlikely(ret
!= 0))
1573 goto out_no_addr_mm
;
1575 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1576 bdev
->nice_mode
= true;
1577 INIT_LIST_HEAD(&bdev
->ddestroy
);
1578 bdev
->dev_mapping
= NULL
;
1580 bdev
->need_dma32
= need_dma32
;
1582 spin_lock_init(&bdev
->fence_lock
);
1583 mutex_lock(&glob
->device_list_mutex
);
1584 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1585 mutex_unlock(&glob
->device_list_mutex
);
1589 ttm_bo_clean_mm(bdev
, 0);
1593 EXPORT_SYMBOL(ttm_bo_device_init
);
1596 * buffer object vm functions.
1599 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1601 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1603 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1604 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1607 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1610 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1616 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1618 struct ttm_bo_device
*bdev
= bo
->bdev
;
1619 loff_t offset
= (loff_t
) bo
->addr_space_offset
;
1620 loff_t holelen
= ((loff_t
) bo
->mem
.num_pages
) << PAGE_SHIFT
;
1622 if (!bdev
->dev_mapping
)
1624 unmap_mapping_range(bdev
->dev_mapping
, offset
, holelen
, 1);
1625 ttm_mem_io_free_vm(bo
);
1628 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1630 struct ttm_bo_device
*bdev
= bo
->bdev
;
1631 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1633 ttm_mem_io_lock(man
, false);
1634 ttm_bo_unmap_virtual_locked(bo
);
1635 ttm_mem_io_unlock(man
);
1639 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1641 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object
*bo
)
1643 struct ttm_bo_device
*bdev
= bo
->bdev
;
1644 struct rb_node
**cur
= &bdev
->addr_space_rb
.rb_node
;
1645 struct rb_node
*parent
= NULL
;
1646 struct ttm_buffer_object
*cur_bo
;
1647 unsigned long offset
= bo
->vm_node
->start
;
1648 unsigned long cur_offset
;
1652 cur_bo
= rb_entry(parent
, struct ttm_buffer_object
, vm_rb
);
1653 cur_offset
= cur_bo
->vm_node
->start
;
1654 if (offset
< cur_offset
)
1655 cur
= &parent
->rb_left
;
1656 else if (offset
> cur_offset
)
1657 cur
= &parent
->rb_right
;
1662 rb_link_node(&bo
->vm_rb
, parent
, cur
);
1663 rb_insert_color(&bo
->vm_rb
, &bdev
->addr_space_rb
);
1669 * @bo: the buffer to allocate address space for
1671 * Allocate address space in the drm device so that applications
1672 * can mmap the buffer and access the contents. This only
1673 * applies to ttm_bo_type_device objects as others are not
1674 * placed in the drm device address space.
1677 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1679 struct ttm_bo_device
*bdev
= bo
->bdev
;
1683 ret
= drm_mm_pre_get(&bdev
->addr_space_mm
);
1684 if (unlikely(ret
!= 0))
1687 write_lock(&bdev
->vm_lock
);
1688 bo
->vm_node
= drm_mm_search_free(&bdev
->addr_space_mm
,
1689 bo
->mem
.num_pages
, 0, 0);
1691 if (unlikely(bo
->vm_node
== NULL
)) {
1696 bo
->vm_node
= drm_mm_get_block_atomic(bo
->vm_node
,
1697 bo
->mem
.num_pages
, 0);
1699 if (unlikely(bo
->vm_node
== NULL
)) {
1700 write_unlock(&bdev
->vm_lock
);
1704 ttm_bo_vm_insert_rb(bo
);
1705 write_unlock(&bdev
->vm_lock
);
1706 bo
->addr_space_offset
= ((uint64_t) bo
->vm_node
->start
) << PAGE_SHIFT
;
1710 write_unlock(&bdev
->vm_lock
);
1714 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1715 bool lazy
, bool interruptible
, bool no_wait
)
1717 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1718 struct ttm_bo_device
*bdev
= bo
->bdev
;
1723 if (likely(bo
->sync_obj
== NULL
))
1726 while (bo
->sync_obj
) {
1728 if (driver
->sync_obj_signaled(bo
->sync_obj
, bo
->sync_obj_arg
)) {
1729 void *tmp_obj
= bo
->sync_obj
;
1730 bo
->sync_obj
= NULL
;
1731 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1732 spin_unlock(&bdev
->fence_lock
);
1733 driver
->sync_obj_unref(&tmp_obj
);
1734 spin_lock(&bdev
->fence_lock
);
1741 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1742 sync_obj_arg
= bo
->sync_obj_arg
;
1743 spin_unlock(&bdev
->fence_lock
);
1744 ret
= driver
->sync_obj_wait(sync_obj
, sync_obj_arg
,
1745 lazy
, interruptible
);
1746 if (unlikely(ret
!= 0)) {
1747 driver
->sync_obj_unref(&sync_obj
);
1748 spin_lock(&bdev
->fence_lock
);
1751 spin_lock(&bdev
->fence_lock
);
1752 if (likely(bo
->sync_obj
== sync_obj
&&
1753 bo
->sync_obj_arg
== sync_obj_arg
)) {
1754 void *tmp_obj
= bo
->sync_obj
;
1755 bo
->sync_obj
= NULL
;
1756 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1758 spin_unlock(&bdev
->fence_lock
);
1759 driver
->sync_obj_unref(&sync_obj
);
1760 driver
->sync_obj_unref(&tmp_obj
);
1761 spin_lock(&bdev
->fence_lock
);
1763 spin_unlock(&bdev
->fence_lock
);
1764 driver
->sync_obj_unref(&sync_obj
);
1765 spin_lock(&bdev
->fence_lock
);
1770 EXPORT_SYMBOL(ttm_bo_wait
);
1772 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1774 struct ttm_bo_device
*bdev
= bo
->bdev
;
1778 * Using ttm_bo_reserve makes sure the lru lists are updated.
1781 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1782 if (unlikely(ret
!= 0))
1784 spin_lock(&bdev
->fence_lock
);
1785 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1786 spin_unlock(&bdev
->fence_lock
);
1787 if (likely(ret
== 0))
1788 atomic_inc(&bo
->cpu_writers
);
1789 ttm_bo_unreserve(bo
);
1792 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1794 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1796 if (atomic_dec_and_test(&bo
->cpu_writers
))
1797 wake_up_all(&bo
->event_queue
);
1799 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1802 * A buffer object shrink method that tries to swap out the first
1803 * buffer object on the bo_global::swap_lru list.
1806 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1808 struct ttm_bo_global
*glob
=
1809 container_of(shrink
, struct ttm_bo_global
, shrink
);
1810 struct ttm_buffer_object
*bo
;
1813 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1815 spin_lock(&glob
->lru_lock
);
1816 while (ret
== -EBUSY
) {
1817 if (unlikely(list_empty(&glob
->swap_lru
))) {
1818 spin_unlock(&glob
->lru_lock
);
1822 bo
= list_first_entry(&glob
->swap_lru
,
1823 struct ttm_buffer_object
, swap
);
1824 kref_get(&bo
->list_kref
);
1826 if (!list_empty(&bo
->ddestroy
)) {
1827 spin_unlock(&glob
->lru_lock
);
1828 (void) ttm_bo_cleanup_refs(bo
, false, false, false);
1829 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1830 spin_lock(&glob
->lru_lock
);
1835 * Reserve buffer. Since we unlock while sleeping, we need
1836 * to re-check that nobody removed us from the swap-list while
1840 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
1841 if (unlikely(ret
== -EBUSY
)) {
1842 spin_unlock(&glob
->lru_lock
);
1843 ttm_bo_wait_unreserved(bo
, false);
1844 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1845 spin_lock(&glob
->lru_lock
);
1850 put_count
= ttm_bo_del_from_lru(bo
);
1851 spin_unlock(&glob
->lru_lock
);
1853 ttm_bo_list_ref_sub(bo
, put_count
, true);
1856 * Wait for GPU, then move to system cached.
1859 spin_lock(&bo
->bdev
->fence_lock
);
1860 ret
= ttm_bo_wait(bo
, false, false, false);
1861 spin_unlock(&bo
->bdev
->fence_lock
);
1863 if (unlikely(ret
!= 0))
1866 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1867 struct ttm_mem_reg evict_mem
;
1869 evict_mem
= bo
->mem
;
1870 evict_mem
.mm_node
= NULL
;
1871 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1872 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1874 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1875 false, false, false);
1876 if (unlikely(ret
!= 0))
1880 ttm_bo_unmap_virtual(bo
);
1883 * Swap out. Buffer will be swapped in again as soon as
1884 * anyone tries to access a ttm page.
1887 if (bo
->bdev
->driver
->swap_notify
)
1888 bo
->bdev
->driver
->swap_notify(bo
);
1890 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1895 * Unreserve without putting on LRU to avoid swapping out an
1896 * already swapped buffer.
1899 atomic_set(&bo
->reserved
, 0);
1900 wake_up_all(&bo
->event_queue
);
1901 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1905 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1907 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1910 EXPORT_SYMBOL(ttm_bo_swapout_all
);