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
);
153 if (bo
->resv
== &bo
->ttm_resv
)
154 reservation_object_fini(&bo
->ttm_resv
);
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
!= NULL
) {
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
);
232 * Call bo->mutex locked.
234 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
236 struct ttm_bo_device
*bdev
= bo
->bdev
;
237 struct ttm_bo_global
*glob
= bo
->glob
;
239 uint32_t page_flags
= 0;
241 TTM_ASSERT_LOCKED(&bo
->mutex
);
244 if (bdev
->need_dma32
)
245 page_flags
|= TTM_PAGE_FLAG_DMA32
;
248 case ttm_bo_type_device
:
250 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
251 case ttm_bo_type_kernel
:
252 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
253 page_flags
, glob
->dummy_read_page
);
254 if (unlikely(bo
->ttm
== NULL
))
258 bo
->ttm
= bdev
->driver
->ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
259 page_flags
| TTM_PAGE_FLAG_SG
,
260 glob
->dummy_read_page
);
261 if (unlikely(bo
->ttm
== NULL
)) {
265 bo
->ttm
->sg
= bo
->sg
;
268 pr_err("Illegal buffer object type\n");
276 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
277 struct ttm_mem_reg
*mem
,
278 bool evict
, bool interruptible
,
281 struct ttm_bo_device
*bdev
= bo
->bdev
;
282 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
283 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
284 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
285 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
288 if (old_is_pci
|| new_is_pci
||
289 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
290 ret
= ttm_mem_io_lock(old_man
, true);
291 if (unlikely(ret
!= 0))
293 ttm_bo_unmap_virtual_locked(bo
);
294 ttm_mem_io_unlock(old_man
);
298 * Create and bind a ttm if required.
301 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
302 if (bo
->ttm
== NULL
) {
303 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
304 ret
= ttm_bo_add_ttm(bo
, zero
);
309 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
313 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
314 ret
= ttm_tt_bind(bo
->ttm
, mem
);
319 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
320 if (bdev
->driver
->move_notify
)
321 bdev
->driver
->move_notify(bo
, mem
);
328 if (bdev
->driver
->move_notify
)
329 bdev
->driver
->move_notify(bo
, mem
);
331 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
332 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
333 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_gpu
, mem
);
334 else if (bdev
->driver
->move
)
335 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
338 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_gpu
, mem
);
341 if (bdev
->driver
->move_notify
) {
342 struct ttm_mem_reg tmp_mem
= *mem
;
345 bdev
->driver
->move_notify(bo
, mem
);
355 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
357 pr_err("Can not flush read caches\n");
361 if (bo
->mem
.mm_node
) {
362 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
363 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
364 bo
->cur_placement
= bo
->mem
.placement
;
371 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
372 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
373 ttm_tt_unbind(bo
->ttm
);
374 ttm_tt_destroy(bo
->ttm
);
383 * Will release GPU memory type usage on destruction.
384 * This is the place to put in driver specific hooks to release
385 * driver private resources.
386 * Will release the bo::reserved lock.
389 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
391 if (bo
->bdev
->driver
->move_notify
)
392 bo
->bdev
->driver
->move_notify(bo
, NULL
);
395 ttm_tt_unbind(bo
->ttm
);
396 ttm_tt_destroy(bo
->ttm
);
399 ttm_bo_mem_put(bo
, &bo
->mem
);
401 ww_mutex_unlock (&bo
->resv
->lock
);
404 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
406 struct ttm_bo_device
*bdev
= bo
->bdev
;
407 struct ttm_bo_global
*glob
= bo
->glob
;
408 struct ttm_bo_driver
*driver
= bdev
->driver
;
409 void *sync_obj
= NULL
;
413 spin_lock(&glob
->lru_lock
);
414 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
416 spin_lock(&bdev
->fence_lock
);
417 (void) ttm_bo_wait(bo
, false, false, true);
418 if (!ret
&& !bo
->sync_obj
) {
419 spin_unlock(&bdev
->fence_lock
);
420 put_count
= ttm_bo_del_from_lru(bo
);
422 spin_unlock(&glob
->lru_lock
);
423 ttm_bo_cleanup_memtype_use(bo
);
425 ttm_bo_list_ref_sub(bo
, put_count
, true);
430 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
431 spin_unlock(&bdev
->fence_lock
);
434 ww_mutex_unlock(&bo
->resv
->lock
);
436 kref_get(&bo
->list_kref
);
437 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
438 spin_unlock(&glob
->lru_lock
);
441 driver
->sync_obj_flush(sync_obj
);
442 driver
->sync_obj_unref(&sync_obj
);
444 schedule_delayed_work(&bdev
->wq
,
445 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
449 * function ttm_bo_cleanup_refs_and_unlock
450 * If bo idle, remove from delayed- and lru lists, and unref.
451 * If not idle, do nothing.
453 * Must be called with lru_lock and reservation held, this function
454 * will drop both before returning.
456 * @interruptible Any sleeps should occur interruptibly.
457 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
460 static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object
*bo
,
464 struct ttm_bo_device
*bdev
= bo
->bdev
;
465 struct ttm_bo_driver
*driver
= bdev
->driver
;
466 struct ttm_bo_global
*glob
= bo
->glob
;
470 spin_lock(&bdev
->fence_lock
);
471 ret
= ttm_bo_wait(bo
, false, false, true);
473 if (ret
&& !no_wait_gpu
) {
477 * Take a reference to the fence and unreserve,
478 * at this point the buffer should be dead, so
479 * no new sync objects can be attached.
481 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
482 spin_unlock(&bdev
->fence_lock
);
484 ww_mutex_unlock(&bo
->resv
->lock
);
485 spin_unlock(&glob
->lru_lock
);
487 ret
= driver
->sync_obj_wait(sync_obj
, false, interruptible
);
488 driver
->sync_obj_unref(&sync_obj
);
493 * remove sync_obj with ttm_bo_wait, the wait should be
494 * finished, and no new wait object should have been added.
496 spin_lock(&bdev
->fence_lock
);
497 ret
= ttm_bo_wait(bo
, false, false, true);
499 spin_unlock(&bdev
->fence_lock
);
503 spin_lock(&glob
->lru_lock
);
504 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
507 * We raced, and lost, someone else holds the reservation now,
508 * and is probably busy in ttm_bo_cleanup_memtype_use.
510 * Even if it's not the case, because we finished waiting any
511 * delayed destruction would succeed, so just return success
515 spin_unlock(&glob
->lru_lock
);
519 spin_unlock(&bdev
->fence_lock
);
521 if (ret
|| unlikely(list_empty(&bo
->ddestroy
))) {
522 ww_mutex_unlock(&bo
->resv
->lock
);
523 spin_unlock(&glob
->lru_lock
);
527 put_count
= ttm_bo_del_from_lru(bo
);
528 list_del_init(&bo
->ddestroy
);
531 spin_unlock(&glob
->lru_lock
);
532 ttm_bo_cleanup_memtype_use(bo
);
534 ttm_bo_list_ref_sub(bo
, put_count
, true);
540 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
541 * encountered buffers.
544 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
546 struct ttm_bo_global
*glob
= bdev
->glob
;
547 struct ttm_buffer_object
*entry
= NULL
;
550 spin_lock(&glob
->lru_lock
);
551 if (list_empty(&bdev
->ddestroy
))
554 entry
= list_first_entry(&bdev
->ddestroy
,
555 struct ttm_buffer_object
, ddestroy
);
556 kref_get(&entry
->list_kref
);
559 struct ttm_buffer_object
*nentry
= NULL
;
561 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
562 nentry
= list_first_entry(&entry
->ddestroy
,
563 struct ttm_buffer_object
, ddestroy
);
564 kref_get(&nentry
->list_kref
);
567 ret
= ttm_bo_reserve_nolru(entry
, false, true, false, 0);
568 if (remove_all
&& ret
) {
569 spin_unlock(&glob
->lru_lock
);
570 ret
= ttm_bo_reserve_nolru(entry
, false, false,
572 spin_lock(&glob
->lru_lock
);
576 ret
= ttm_bo_cleanup_refs_and_unlock(entry
, false,
579 spin_unlock(&glob
->lru_lock
);
581 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
587 spin_lock(&glob
->lru_lock
);
588 if (list_empty(&entry
->ddestroy
))
593 spin_unlock(&glob
->lru_lock
);
596 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
600 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
602 struct ttm_bo_device
*bdev
=
603 container_of(work
, struct ttm_bo_device
, wq
.work
);
605 if (ttm_bo_delayed_delete(bdev
, false)) {
606 schedule_delayed_work(&bdev
->wq
,
607 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
611 static void ttm_bo_release(struct kref
*kref
)
613 struct ttm_buffer_object
*bo
=
614 container_of(kref
, struct ttm_buffer_object
, kref
);
615 struct ttm_bo_device
*bdev
= bo
->bdev
;
616 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
618 write_lock(&bdev
->vm_lock
);
619 if (likely(bo
->vm_node
!= NULL
)) {
620 rb_erase(&bo
->vm_rb
, &bdev
->addr_space_rb
);
621 drm_mm_put_block(bo
->vm_node
);
624 write_unlock(&bdev
->vm_lock
);
625 ttm_mem_io_lock(man
, false);
626 ttm_mem_io_free_vm(bo
);
627 ttm_mem_io_unlock(man
);
628 ttm_bo_cleanup_refs_or_queue(bo
);
629 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
632 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
634 struct ttm_buffer_object
*bo
= *p_bo
;
637 kref_put(&bo
->kref
, ttm_bo_release
);
639 EXPORT_SYMBOL(ttm_bo_unref
);
641 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
643 return cancel_delayed_work_sync(&bdev
->wq
);
645 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
647 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
650 schedule_delayed_work(&bdev
->wq
,
651 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
653 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
655 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
658 struct ttm_bo_device
*bdev
= bo
->bdev
;
659 struct ttm_mem_reg evict_mem
;
660 struct ttm_placement placement
;
663 spin_lock(&bdev
->fence_lock
);
664 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
665 spin_unlock(&bdev
->fence_lock
);
667 if (unlikely(ret
!= 0)) {
668 if (ret
!= -ERESTARTSYS
) {
669 pr_err("Failed to expire sync object before buffer eviction\n");
674 lockdep_assert_held(&bo
->resv
->lock
.base
);
677 evict_mem
.mm_node
= NULL
;
678 evict_mem
.bus
.io_reserved_vm
= false;
679 evict_mem
.bus
.io_reserved_count
= 0;
683 placement
.num_placement
= 0;
684 placement
.num_busy_placement
= 0;
685 bdev
->driver
->evict_flags(bo
, &placement
);
686 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
689 if (ret
!= -ERESTARTSYS
) {
690 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
692 ttm_bo_mem_space_debug(bo
, &placement
);
697 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
700 if (ret
!= -ERESTARTSYS
)
701 pr_err("Buffer eviction failed\n");
702 ttm_bo_mem_put(bo
, &evict_mem
);
710 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
715 struct ttm_bo_global
*glob
= bdev
->glob
;
716 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
717 struct ttm_buffer_object
*bo
;
718 int ret
= -EBUSY
, put_count
;
720 spin_lock(&glob
->lru_lock
);
721 list_for_each_entry(bo
, &man
->lru
, lru
) {
722 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
728 spin_unlock(&glob
->lru_lock
);
732 kref_get(&bo
->list_kref
);
734 if (!list_empty(&bo
->ddestroy
)) {
735 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, interruptible
,
737 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
741 put_count
= ttm_bo_del_from_lru(bo
);
742 spin_unlock(&glob
->lru_lock
);
746 ttm_bo_list_ref_sub(bo
, put_count
, true);
748 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_gpu
);
749 ttm_bo_unreserve(bo
);
751 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
755 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
757 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
760 (*man
->func
->put_node
)(man
, mem
);
762 EXPORT_SYMBOL(ttm_bo_mem_put
);
765 * Repeatedly evict memory from the LRU for @mem_type until we create enough
766 * space, or we've evicted everything and there isn't enough space.
768 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
770 struct ttm_placement
*placement
,
771 struct ttm_mem_reg
*mem
,
775 struct ttm_bo_device
*bdev
= bo
->bdev
;
776 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
780 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
781 if (unlikely(ret
!= 0))
785 ret
= ttm_mem_evict_first(bdev
, mem_type
,
786 interruptible
, no_wait_gpu
);
787 if (unlikely(ret
!= 0))
790 if (mem
->mm_node
== NULL
)
792 mem
->mem_type
= mem_type
;
796 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
797 uint32_t cur_placement
,
798 uint32_t proposed_placement
)
800 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
801 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
804 * Keep current caching if possible.
807 if ((cur_placement
& caching
) != 0)
808 result
|= (cur_placement
& caching
);
809 else if ((man
->default_caching
& caching
) != 0)
810 result
|= man
->default_caching
;
811 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
812 result
|= TTM_PL_FLAG_CACHED
;
813 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
814 result
|= TTM_PL_FLAG_WC
;
815 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
816 result
|= TTM_PL_FLAG_UNCACHED
;
821 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
823 uint32_t proposed_placement
,
824 uint32_t *masked_placement
)
826 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
828 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
831 if ((proposed_placement
& man
->available_caching
) == 0)
834 cur_flags
|= (proposed_placement
& man
->available_caching
);
836 *masked_placement
= cur_flags
;
841 * Creates space for memory region @mem according to its type.
843 * This function first searches for free space in compatible memory types in
844 * the priority order defined by the driver. If free space isn't found, then
845 * ttm_bo_mem_force_space is attempted in priority order to evict and find
848 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
849 struct ttm_placement
*placement
,
850 struct ttm_mem_reg
*mem
,
854 struct ttm_bo_device
*bdev
= bo
->bdev
;
855 struct ttm_mem_type_manager
*man
;
856 uint32_t mem_type
= TTM_PL_SYSTEM
;
857 uint32_t cur_flags
= 0;
858 bool type_found
= false;
859 bool type_ok
= false;
860 bool has_erestartsys
= false;
864 for (i
= 0; i
< placement
->num_placement
; ++i
) {
865 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
869 man
= &bdev
->man
[mem_type
];
871 type_ok
= ttm_bo_mt_compatible(man
,
873 placement
->placement
[i
],
879 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
882 * Use the access and other non-mapping-related flag bits from
883 * the memory placement flags to the current flags
885 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
886 ~TTM_PL_MASK_MEMTYPE
);
888 if (mem_type
== TTM_PL_SYSTEM
)
891 if (man
->has_type
&& man
->use_type
) {
893 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
901 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
902 mem
->mem_type
= mem_type
;
903 mem
->placement
= cur_flags
;
910 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
911 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
915 man
= &bdev
->man
[mem_type
];
918 if (!ttm_bo_mt_compatible(man
,
920 placement
->busy_placement
[i
],
924 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
927 * Use the access and other non-mapping-related flag bits from
928 * the memory placement flags to the current flags
930 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
931 ~TTM_PL_MASK_MEMTYPE
);
934 if (mem_type
== TTM_PL_SYSTEM
) {
935 mem
->mem_type
= mem_type
;
936 mem
->placement
= cur_flags
;
941 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
942 interruptible
, no_wait_gpu
);
943 if (ret
== 0 && mem
->mm_node
) {
944 mem
->placement
= cur_flags
;
947 if (ret
== -ERESTARTSYS
)
948 has_erestartsys
= true;
950 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
953 EXPORT_SYMBOL(ttm_bo_mem_space
);
955 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
956 struct ttm_placement
*placement
,
961 struct ttm_mem_reg mem
;
962 struct ttm_bo_device
*bdev
= bo
->bdev
;
964 lockdep_assert_held(&bo
->resv
->lock
.base
);
967 * FIXME: It's possible to pipeline buffer moves.
968 * Have the driver move function wait for idle when necessary,
969 * instead of doing it here.
971 spin_lock(&bdev
->fence_lock
);
972 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
973 spin_unlock(&bdev
->fence_lock
);
976 mem
.num_pages
= bo
->num_pages
;
977 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
978 mem
.page_alignment
= bo
->mem
.page_alignment
;
979 mem
.bus
.io_reserved_vm
= false;
980 mem
.bus
.io_reserved_count
= 0;
982 * Determine where to move the buffer.
984 ret
= ttm_bo_mem_space(bo
, placement
, &mem
,
985 interruptible
, no_wait_gpu
);
988 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false,
989 interruptible
, no_wait_gpu
);
991 if (ret
&& mem
.mm_node
)
992 ttm_bo_mem_put(bo
, &mem
);
996 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
997 struct ttm_mem_reg
*mem
)
1001 if (mem
->mm_node
&& placement
->lpfn
!= 0 &&
1002 (mem
->start
< placement
->fpfn
||
1003 mem
->start
+ mem
->num_pages
> placement
->lpfn
))
1006 for (i
= 0; i
< placement
->num_placement
; i
++) {
1007 if ((placement
->placement
[i
] & mem
->placement
&
1008 TTM_PL_MASK_CACHING
) &&
1009 (placement
->placement
[i
] & mem
->placement
&
1016 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1017 struct ttm_placement
*placement
,
1023 lockdep_assert_held(&bo
->resv
->lock
.base
);
1024 /* Check that range is valid */
1025 if (placement
->lpfn
|| placement
->fpfn
)
1026 if (placement
->fpfn
> placement
->lpfn
||
1027 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1030 * Check whether we need to move buffer.
1032 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1034 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
,
1040 * Use the access and other non-mapping-related flag bits from
1041 * the compatible memory placement flags to the active flags
1043 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1044 ~TTM_PL_MASK_MEMTYPE
);
1047 * We might need to add a TTM.
1049 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1050 ret
= ttm_bo_add_ttm(bo
, true);
1056 EXPORT_SYMBOL(ttm_bo_validate
);
1058 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1059 struct ttm_placement
*placement
)
1061 BUG_ON((placement
->fpfn
|| placement
->lpfn
) &&
1062 (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)));
1067 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1068 struct ttm_buffer_object
*bo
,
1070 enum ttm_bo_type type
,
1071 struct ttm_placement
*placement
,
1072 uint32_t page_alignment
,
1074 struct file
*persistent_swap_storage
,
1076 struct sg_table
*sg
,
1077 void (*destroy
) (struct ttm_buffer_object
*))
1080 unsigned long num_pages
;
1081 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1084 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1086 pr_err("Out of kernel memory\n");
1094 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1095 if (num_pages
== 0) {
1096 pr_err("Illegal buffer object size\n");
1101 ttm_mem_global_free(mem_glob
, acc_size
);
1104 bo
->destroy
= destroy
;
1106 kref_init(&bo
->kref
);
1107 kref_init(&bo
->list_kref
);
1108 atomic_set(&bo
->cpu_writers
, 0);
1109 INIT_LIST_HEAD(&bo
->lru
);
1110 INIT_LIST_HEAD(&bo
->ddestroy
);
1111 INIT_LIST_HEAD(&bo
->swap
);
1112 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1114 bo
->glob
= bdev
->glob
;
1116 bo
->num_pages
= num_pages
;
1117 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1118 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1119 bo
->mem
.num_pages
= bo
->num_pages
;
1120 bo
->mem
.mm_node
= NULL
;
1121 bo
->mem
.page_alignment
= page_alignment
;
1122 bo
->mem
.bus
.io_reserved_vm
= false;
1123 bo
->mem
.bus
.io_reserved_count
= 0;
1125 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1126 bo
->persistent_swap_storage
= persistent_swap_storage
;
1127 bo
->acc_size
= acc_size
;
1129 bo
->resv
= &bo
->ttm_resv
;
1130 reservation_object_init(bo
->resv
);
1131 atomic_inc(&bo
->glob
->bo_count
);
1133 ret
= ttm_bo_check_placement(bo
, placement
);
1136 * For ttm_bo_type_device buffers, allocate
1137 * address space from the device.
1140 (bo
->type
== ttm_bo_type_device
||
1141 bo
->type
== ttm_bo_type_sg
))
1142 ret
= ttm_bo_setup_vm(bo
);
1144 locked
= ww_mutex_trylock(&bo
->resv
->lock
);
1148 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1150 ttm_bo_unreserve(bo
);
1157 EXPORT_SYMBOL(ttm_bo_init
);
1159 size_t ttm_bo_acc_size(struct ttm_bo_device
*bdev
,
1160 unsigned long bo_size
,
1161 unsigned struct_size
)
1163 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1166 size
+= ttm_round_pot(struct_size
);
1167 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1168 size
+= ttm_round_pot(sizeof(struct ttm_tt
));
1171 EXPORT_SYMBOL(ttm_bo_acc_size
);
1173 size_t ttm_bo_dma_acc_size(struct ttm_bo_device
*bdev
,
1174 unsigned long bo_size
,
1175 unsigned struct_size
)
1177 unsigned npages
= (PAGE_ALIGN(bo_size
)) >> PAGE_SHIFT
;
1180 size
+= ttm_round_pot(struct_size
);
1181 size
+= PAGE_ALIGN(npages
* sizeof(void *));
1182 size
+= PAGE_ALIGN(npages
* sizeof(dma_addr_t
));
1183 size
+= ttm_round_pot(sizeof(struct ttm_dma_tt
));
1186 EXPORT_SYMBOL(ttm_bo_dma_acc_size
);
1188 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1190 enum ttm_bo_type type
,
1191 struct ttm_placement
*placement
,
1192 uint32_t page_alignment
,
1194 struct file
*persistent_swap_storage
,
1195 struct ttm_buffer_object
**p_bo
)
1197 struct ttm_buffer_object
*bo
;
1201 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1202 if (unlikely(bo
== NULL
))
1205 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct ttm_buffer_object
));
1206 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1207 interruptible
, persistent_swap_storage
, acc_size
,
1209 if (likely(ret
== 0))
1214 EXPORT_SYMBOL(ttm_bo_create
);
1216 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1217 unsigned mem_type
, bool allow_errors
)
1219 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1220 struct ttm_bo_global
*glob
= bdev
->glob
;
1224 * Can't use standard list traversal since we're unlocking.
1227 spin_lock(&glob
->lru_lock
);
1228 while (!list_empty(&man
->lru
)) {
1229 spin_unlock(&glob
->lru_lock
);
1230 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false);
1235 pr_err("Cleanup eviction failed\n");
1238 spin_lock(&glob
->lru_lock
);
1240 spin_unlock(&glob
->lru_lock
);
1244 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1246 struct ttm_mem_type_manager
*man
;
1249 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1250 pr_err("Illegal memory type %d\n", mem_type
);
1253 man
= &bdev
->man
[mem_type
];
1255 if (!man
->has_type
) {
1256 pr_err("Trying to take down uninitialized memory manager type %u\n",
1261 man
->use_type
= false;
1262 man
->has_type
= false;
1266 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1268 ret
= (*man
->func
->takedown
)(man
);
1273 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1275 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1277 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1279 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1280 pr_err("Illegal memory manager memory type %u\n", mem_type
);
1284 if (!man
->has_type
) {
1285 pr_err("Memory type %u has not been initialized\n", mem_type
);
1289 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1291 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1293 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1294 unsigned long p_size
)
1297 struct ttm_mem_type_manager
*man
;
1299 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1300 man
= &bdev
->man
[type
];
1301 BUG_ON(man
->has_type
);
1302 man
->io_reserve_fastpath
= true;
1303 man
->use_io_reserve_lru
= false;
1304 mutex_init(&man
->io_reserve_mutex
);
1305 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1307 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1313 if (type
!= TTM_PL_SYSTEM
) {
1314 ret
= (*man
->func
->init
)(man
, p_size
);
1318 man
->has_type
= true;
1319 man
->use_type
= true;
1322 INIT_LIST_HEAD(&man
->lru
);
1326 EXPORT_SYMBOL(ttm_bo_init_mm
);
1328 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1330 struct ttm_bo_global
*glob
=
1331 container_of(kobj
, struct ttm_bo_global
, kobj
);
1333 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1334 __free_page(glob
->dummy_read_page
);
1338 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1340 struct ttm_bo_global
*glob
= ref
->object
;
1342 kobject_del(&glob
->kobj
);
1343 kobject_put(&glob
->kobj
);
1345 EXPORT_SYMBOL(ttm_bo_global_release
);
1347 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1349 struct ttm_bo_global_ref
*bo_ref
=
1350 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1351 struct ttm_bo_global
*glob
= ref
->object
;
1354 mutex_init(&glob
->device_list_mutex
);
1355 spin_lock_init(&glob
->lru_lock
);
1356 glob
->mem_glob
= bo_ref
->mem_glob
;
1357 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1359 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1364 INIT_LIST_HEAD(&glob
->swap_lru
);
1365 INIT_LIST_HEAD(&glob
->device_list
);
1367 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1368 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1369 if (unlikely(ret
!= 0)) {
1370 pr_err("Could not register buffer object swapout\n");
1374 atomic_set(&glob
->bo_count
, 0);
1376 ret
= kobject_init_and_add(
1377 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1378 if (unlikely(ret
!= 0))
1379 kobject_put(&glob
->kobj
);
1382 __free_page(glob
->dummy_read_page
);
1387 EXPORT_SYMBOL(ttm_bo_global_init
);
1390 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1393 unsigned i
= TTM_NUM_MEM_TYPES
;
1394 struct ttm_mem_type_manager
*man
;
1395 struct ttm_bo_global
*glob
= bdev
->glob
;
1398 man
= &bdev
->man
[i
];
1399 if (man
->has_type
) {
1400 man
->use_type
= false;
1401 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1403 pr_err("DRM memory manager type %d is not clean\n",
1406 man
->has_type
= false;
1410 mutex_lock(&glob
->device_list_mutex
);
1411 list_del(&bdev
->device_list
);
1412 mutex_unlock(&glob
->device_list_mutex
);
1414 cancel_delayed_work_sync(&bdev
->wq
);
1416 while (ttm_bo_delayed_delete(bdev
, true))
1419 spin_lock(&glob
->lru_lock
);
1420 if (list_empty(&bdev
->ddestroy
))
1421 TTM_DEBUG("Delayed destroy list was clean\n");
1423 if (list_empty(&bdev
->man
[0].lru
))
1424 TTM_DEBUG("Swap list was clean\n");
1425 spin_unlock(&glob
->lru_lock
);
1427 BUG_ON(!drm_mm_clean(&bdev
->addr_space_mm
));
1428 write_lock(&bdev
->vm_lock
);
1429 drm_mm_takedown(&bdev
->addr_space_mm
);
1430 write_unlock(&bdev
->vm_lock
);
1434 EXPORT_SYMBOL(ttm_bo_device_release
);
1436 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1437 struct ttm_bo_global
*glob
,
1438 struct ttm_bo_driver
*driver
,
1439 uint64_t file_page_offset
,
1444 rwlock_init(&bdev
->vm_lock
);
1445 bdev
->driver
= driver
;
1447 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1450 * Initialize the system memory buffer type.
1451 * Other types need to be driver / IOCTL initialized.
1453 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1454 if (unlikely(ret
!= 0))
1457 bdev
->addr_space_rb
= RB_ROOT
;
1458 drm_mm_init(&bdev
->addr_space_mm
, file_page_offset
, 0x10000000);
1460 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1461 INIT_LIST_HEAD(&bdev
->ddestroy
);
1462 bdev
->dev_mapping
= NULL
;
1464 bdev
->need_dma32
= need_dma32
;
1466 spin_lock_init(&bdev
->fence_lock
);
1467 mutex_lock(&glob
->device_list_mutex
);
1468 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1469 mutex_unlock(&glob
->device_list_mutex
);
1475 EXPORT_SYMBOL(ttm_bo_device_init
);
1478 * buffer object vm functions.
1481 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1483 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1485 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1486 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1489 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1492 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1498 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1500 struct ttm_bo_device
*bdev
= bo
->bdev
;
1501 loff_t offset
= (loff_t
) bo
->addr_space_offset
;
1502 loff_t holelen
= ((loff_t
) bo
->mem
.num_pages
) << PAGE_SHIFT
;
1504 if (!bdev
->dev_mapping
)
1506 unmap_mapping_range(bdev
->dev_mapping
, offset
, holelen
, 1);
1507 ttm_mem_io_free_vm(bo
);
1510 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1512 struct ttm_bo_device
*bdev
= bo
->bdev
;
1513 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1515 ttm_mem_io_lock(man
, false);
1516 ttm_bo_unmap_virtual_locked(bo
);
1517 ttm_mem_io_unlock(man
);
1521 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1523 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object
*bo
)
1525 struct ttm_bo_device
*bdev
= bo
->bdev
;
1526 struct rb_node
**cur
= &bdev
->addr_space_rb
.rb_node
;
1527 struct rb_node
*parent
= NULL
;
1528 struct ttm_buffer_object
*cur_bo
;
1529 unsigned long offset
= bo
->vm_node
->start
;
1530 unsigned long cur_offset
;
1534 cur_bo
= rb_entry(parent
, struct ttm_buffer_object
, vm_rb
);
1535 cur_offset
= cur_bo
->vm_node
->start
;
1536 if (offset
< cur_offset
)
1537 cur
= &parent
->rb_left
;
1538 else if (offset
> cur_offset
)
1539 cur
= &parent
->rb_right
;
1544 rb_link_node(&bo
->vm_rb
, parent
, cur
);
1545 rb_insert_color(&bo
->vm_rb
, &bdev
->addr_space_rb
);
1551 * @bo: the buffer to allocate address space for
1553 * Allocate address space in the drm device so that applications
1554 * can mmap the buffer and access the contents. This only
1555 * applies to ttm_bo_type_device objects as others are not
1556 * placed in the drm device address space.
1559 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1561 struct ttm_bo_device
*bdev
= bo
->bdev
;
1565 ret
= drm_mm_pre_get(&bdev
->addr_space_mm
);
1566 if (unlikely(ret
!= 0))
1569 write_lock(&bdev
->vm_lock
);
1570 bo
->vm_node
= drm_mm_search_free(&bdev
->addr_space_mm
,
1571 bo
->mem
.num_pages
, 0, 0);
1573 if (unlikely(bo
->vm_node
== NULL
)) {
1578 bo
->vm_node
= drm_mm_get_block_atomic(bo
->vm_node
,
1579 bo
->mem
.num_pages
, 0);
1581 if (unlikely(bo
->vm_node
== NULL
)) {
1582 write_unlock(&bdev
->vm_lock
);
1586 ttm_bo_vm_insert_rb(bo
);
1587 write_unlock(&bdev
->vm_lock
);
1588 bo
->addr_space_offset
= ((uint64_t) bo
->vm_node
->start
) << PAGE_SHIFT
;
1592 write_unlock(&bdev
->vm_lock
);
1596 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1597 bool lazy
, bool interruptible
, bool no_wait
)
1599 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1600 struct ttm_bo_device
*bdev
= bo
->bdev
;
1604 if (likely(bo
->sync_obj
== NULL
))
1607 while (bo
->sync_obj
) {
1609 if (driver
->sync_obj_signaled(bo
->sync_obj
)) {
1610 void *tmp_obj
= bo
->sync_obj
;
1611 bo
->sync_obj
= NULL
;
1612 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1613 spin_unlock(&bdev
->fence_lock
);
1614 driver
->sync_obj_unref(&tmp_obj
);
1615 spin_lock(&bdev
->fence_lock
);
1622 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1623 spin_unlock(&bdev
->fence_lock
);
1624 ret
= driver
->sync_obj_wait(sync_obj
,
1625 lazy
, interruptible
);
1626 if (unlikely(ret
!= 0)) {
1627 driver
->sync_obj_unref(&sync_obj
);
1628 spin_lock(&bdev
->fence_lock
);
1631 spin_lock(&bdev
->fence_lock
);
1632 if (likely(bo
->sync_obj
== sync_obj
)) {
1633 void *tmp_obj
= bo
->sync_obj
;
1634 bo
->sync_obj
= NULL
;
1635 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1637 spin_unlock(&bdev
->fence_lock
);
1638 driver
->sync_obj_unref(&sync_obj
);
1639 driver
->sync_obj_unref(&tmp_obj
);
1640 spin_lock(&bdev
->fence_lock
);
1642 spin_unlock(&bdev
->fence_lock
);
1643 driver
->sync_obj_unref(&sync_obj
);
1644 spin_lock(&bdev
->fence_lock
);
1649 EXPORT_SYMBOL(ttm_bo_wait
);
1651 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1653 struct ttm_bo_device
*bdev
= bo
->bdev
;
1657 * Using ttm_bo_reserve makes sure the lru lists are updated.
1660 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1661 if (unlikely(ret
!= 0))
1663 spin_lock(&bdev
->fence_lock
);
1664 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1665 spin_unlock(&bdev
->fence_lock
);
1666 if (likely(ret
== 0))
1667 atomic_inc(&bo
->cpu_writers
);
1668 ttm_bo_unreserve(bo
);
1671 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1673 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1675 atomic_dec(&bo
->cpu_writers
);
1677 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1680 * A buffer object shrink method that tries to swap out the first
1681 * buffer object on the bo_global::swap_lru list.
1684 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1686 struct ttm_bo_global
*glob
=
1687 container_of(shrink
, struct ttm_bo_global
, shrink
);
1688 struct ttm_buffer_object
*bo
;
1691 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1693 spin_lock(&glob
->lru_lock
);
1694 list_for_each_entry(bo
, &glob
->swap_lru
, swap
) {
1695 ret
= ttm_bo_reserve_nolru(bo
, false, true, false, 0);
1701 spin_unlock(&glob
->lru_lock
);
1705 kref_get(&bo
->list_kref
);
1707 if (!list_empty(&bo
->ddestroy
)) {
1708 ret
= ttm_bo_cleanup_refs_and_unlock(bo
, false, false);
1709 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1713 put_count
= ttm_bo_del_from_lru(bo
);
1714 spin_unlock(&glob
->lru_lock
);
1716 ttm_bo_list_ref_sub(bo
, put_count
, true);
1719 * Wait for GPU, then move to system cached.
1722 spin_lock(&bo
->bdev
->fence_lock
);
1723 ret
= ttm_bo_wait(bo
, false, false, false);
1724 spin_unlock(&bo
->bdev
->fence_lock
);
1726 if (unlikely(ret
!= 0))
1729 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1730 struct ttm_mem_reg evict_mem
;
1732 evict_mem
= bo
->mem
;
1733 evict_mem
.mm_node
= NULL
;
1734 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1735 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1737 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1739 if (unlikely(ret
!= 0))
1743 ttm_bo_unmap_virtual(bo
);
1746 * Swap out. Buffer will be swapped in again as soon as
1747 * anyone tries to access a ttm page.
1750 if (bo
->bdev
->driver
->swap_notify
)
1751 bo
->bdev
->driver
->swap_notify(bo
);
1753 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1758 * Unreserve without putting on LRU to avoid swapping out an
1759 * already swapped buffer.
1762 ww_mutex_unlock(&bo
->resv
->lock
);
1763 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1767 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1769 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1772 EXPORT_SYMBOL(ttm_bo_swapout_all
);