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 #include "ttm/ttm_module.h"
32 #include "ttm/ttm_bo_driver.h"
33 #include "ttm/ttm_placement.h"
34 #include <linux/jiffies.h>
35 #include <linux/slab.h>
36 #include <linux/sched.h>
38 #include <linux/file.h>
39 #include <linux/module.h>
40 #include <linux/atomic.h>
42 #define TTM_ASSERT_LOCKED(param)
43 #define TTM_DEBUG(fmt, arg...)
44 #define TTM_BO_HASH_ORDER 13
46 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
);
47 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
);
48 static void ttm_bo_global_kobj_release(struct kobject
*kobj
);
50 static struct attribute ttm_bo_count
= {
55 static inline int ttm_mem_type_from_flags(uint32_t flags
, uint32_t *mem_type
)
59 for (i
= 0; i
<= TTM_PL_PRIV5
; i
++)
60 if (flags
& (1 << i
)) {
67 static void ttm_mem_type_debug(struct ttm_bo_device
*bdev
, int mem_type
)
69 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
71 printk(KERN_ERR TTM_PFX
" has_type: %d\n", man
->has_type
);
72 printk(KERN_ERR TTM_PFX
" use_type: %d\n", man
->use_type
);
73 printk(KERN_ERR TTM_PFX
" flags: 0x%08X\n", man
->flags
);
74 printk(KERN_ERR TTM_PFX
" gpu_offset: 0x%08lX\n", man
->gpu_offset
);
75 printk(KERN_ERR TTM_PFX
" size: %llu\n", man
->size
);
76 printk(KERN_ERR TTM_PFX
" available_caching: 0x%08X\n",
77 man
->available_caching
);
78 printk(KERN_ERR TTM_PFX
" default_caching: 0x%08X\n",
79 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 printk(KERN_ERR TTM_PFX
"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 printk(KERN_ERR TTM_PFX
" 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
;
141 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
142 BUG_ON(atomic_read(&bo
->kref
.refcount
));
143 BUG_ON(atomic_read(&bo
->cpu_writers
));
144 BUG_ON(bo
->sync_obj
!= NULL
);
145 BUG_ON(bo
->mem
.mm_node
!= NULL
);
146 BUG_ON(!list_empty(&bo
->lru
));
147 BUG_ON(!list_empty(&bo
->ddestroy
));
150 ttm_tt_destroy(bo
->ttm
);
151 atomic_dec(&bo
->glob
->bo_count
);
155 ttm_mem_global_free(bdev
->glob
->mem_glob
, bo
->acc_size
);
160 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
, bool interruptible
)
163 return wait_event_interruptible(bo
->event_queue
,
164 atomic_read(&bo
->reserved
) == 0);
166 wait_event(bo
->event_queue
, atomic_read(&bo
->reserved
) == 0);
170 EXPORT_SYMBOL(ttm_bo_wait_unreserved
);
172 void ttm_bo_add_to_lru(struct ttm_buffer_object
*bo
)
174 struct ttm_bo_device
*bdev
= bo
->bdev
;
175 struct ttm_mem_type_manager
*man
;
177 BUG_ON(!atomic_read(&bo
->reserved
));
179 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
181 BUG_ON(!list_empty(&bo
->lru
));
183 man
= &bdev
->man
[bo
->mem
.mem_type
];
184 list_add_tail(&bo
->lru
, &man
->lru
);
185 kref_get(&bo
->list_kref
);
187 if (bo
->ttm
!= NULL
) {
188 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
189 kref_get(&bo
->list_kref
);
194 int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
198 if (!list_empty(&bo
->swap
)) {
199 list_del_init(&bo
->swap
);
202 if (!list_empty(&bo
->lru
)) {
203 list_del_init(&bo
->lru
);
208 * TODO: Add a driver hook to delete from
209 * driver-specific LRU's here.
215 int ttm_bo_reserve_locked(struct ttm_buffer_object
*bo
,
217 bool no_wait
, bool use_sequence
, uint32_t sequence
)
219 struct ttm_bo_global
*glob
= bo
->glob
;
222 while (unlikely(atomic_cmpxchg(&bo
->reserved
, 0, 1) != 0)) {
224 * Deadlock avoidance for multi-bo reserving.
226 if (use_sequence
&& bo
->seq_valid
) {
228 * We've already reserved this one.
230 if (unlikely(sequence
== bo
->val_seq
))
233 * Already reserved by a thread that will not back
234 * off for us. We need to back off.
236 if (unlikely(sequence
- bo
->val_seq
< (1 << 31)))
243 spin_unlock(&glob
->lru_lock
);
244 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
245 spin_lock(&glob
->lru_lock
);
253 * Wake up waiters that may need to recheck for deadlock,
254 * if we decreased the sequence number.
256 if (unlikely((bo
->val_seq
- sequence
< (1 << 31))
258 wake_up_all(&bo
->event_queue
);
260 bo
->val_seq
= sequence
;
261 bo
->seq_valid
= true;
263 bo
->seq_valid
= false;
268 EXPORT_SYMBOL(ttm_bo_reserve
);
270 static void ttm_bo_ref_bug(struct kref
*list_kref
)
275 void ttm_bo_list_ref_sub(struct ttm_buffer_object
*bo
, int count
,
278 kref_sub(&bo
->list_kref
, count
,
279 (never_free
) ? ttm_bo_ref_bug
: ttm_bo_release_list
);
282 int ttm_bo_reserve(struct ttm_buffer_object
*bo
,
284 bool no_wait
, bool use_sequence
, uint32_t sequence
)
286 struct ttm_bo_global
*glob
= bo
->glob
;
290 spin_lock(&glob
->lru_lock
);
291 ret
= ttm_bo_reserve_locked(bo
, interruptible
, no_wait
, use_sequence
,
293 if (likely(ret
== 0))
294 put_count
= ttm_bo_del_from_lru(bo
);
295 spin_unlock(&glob
->lru_lock
);
297 ttm_bo_list_ref_sub(bo
, put_count
, true);
302 void ttm_bo_unreserve_locked(struct ttm_buffer_object
*bo
)
304 ttm_bo_add_to_lru(bo
);
305 atomic_set(&bo
->reserved
, 0);
306 wake_up_all(&bo
->event_queue
);
309 void ttm_bo_unreserve(struct ttm_buffer_object
*bo
)
311 struct ttm_bo_global
*glob
= bo
->glob
;
313 spin_lock(&glob
->lru_lock
);
314 ttm_bo_unreserve_locked(bo
);
315 spin_unlock(&glob
->lru_lock
);
317 EXPORT_SYMBOL(ttm_bo_unreserve
);
320 * Call bo->mutex locked.
322 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
324 struct ttm_bo_device
*bdev
= bo
->bdev
;
325 struct ttm_bo_global
*glob
= bo
->glob
;
327 uint32_t page_flags
= 0;
329 TTM_ASSERT_LOCKED(&bo
->mutex
);
332 if (bdev
->need_dma32
)
333 page_flags
|= TTM_PAGE_FLAG_DMA32
;
336 case ttm_bo_type_device
:
338 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
339 case ttm_bo_type_kernel
:
340 bo
->ttm
= ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
341 page_flags
, glob
->dummy_read_page
);
342 if (unlikely(bo
->ttm
== NULL
))
345 case ttm_bo_type_user
:
346 bo
->ttm
= ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
347 page_flags
| TTM_PAGE_FLAG_USER
,
348 glob
->dummy_read_page
);
349 if (unlikely(bo
->ttm
== NULL
)) {
354 ret
= ttm_tt_set_user(bo
->ttm
, current
,
355 bo
->buffer_start
, bo
->num_pages
);
356 if (unlikely(ret
!= 0)) {
357 ttm_tt_destroy(bo
->ttm
);
362 printk(KERN_ERR TTM_PFX
"Illegal buffer object type\n");
370 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
371 struct ttm_mem_reg
*mem
,
372 bool evict
, bool interruptible
,
373 bool no_wait_reserve
, bool no_wait_gpu
)
375 struct ttm_bo_device
*bdev
= bo
->bdev
;
376 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
377 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
378 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
379 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
382 if (old_is_pci
|| new_is_pci
||
383 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0)) {
384 ret
= ttm_mem_io_lock(old_man
, true);
385 if (unlikely(ret
!= 0))
387 ttm_bo_unmap_virtual_locked(bo
);
388 ttm_mem_io_unlock(old_man
);
392 * Create and bind a ttm if required.
395 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
396 if (bo
->ttm
== NULL
) {
397 bool zero
= !(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
);
398 ret
= ttm_bo_add_ttm(bo
, zero
);
403 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
407 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
408 ret
= ttm_tt_bind(bo
->ttm
, mem
);
413 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
414 if (bdev
->driver
->move_notify
)
415 bdev
->driver
->move_notify(bo
, mem
);
422 if (bdev
->driver
->move_notify
)
423 bdev
->driver
->move_notify(bo
, mem
);
425 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
426 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
427 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_reserve
, no_wait_gpu
, mem
);
428 else if (bdev
->driver
->move
)
429 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
430 no_wait_reserve
, no_wait_gpu
, mem
);
432 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_reserve
, no_wait_gpu
, mem
);
439 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
441 printk(KERN_ERR TTM_PFX
"Can not flush read caches\n");
445 if (bo
->mem
.mm_node
) {
446 bo
->offset
= (bo
->mem
.start
<< PAGE_SHIFT
) +
447 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
448 bo
->cur_placement
= bo
->mem
.placement
;
455 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
456 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
457 ttm_tt_unbind(bo
->ttm
);
458 ttm_tt_destroy(bo
->ttm
);
467 * Will release GPU memory type usage on destruction.
468 * This is the place to put in driver specific hooks to release
469 * driver private resources.
470 * Will release the bo::reserved lock.
473 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
476 ttm_tt_unbind(bo
->ttm
);
477 ttm_tt_destroy(bo
->ttm
);
480 ttm_bo_mem_put(bo
, &bo
->mem
);
482 atomic_set(&bo
->reserved
, 0);
485 * Make processes trying to reserve really pick it up.
487 smp_mb__after_atomic_dec();
488 wake_up_all(&bo
->event_queue
);
491 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object
*bo
)
493 struct ttm_bo_device
*bdev
= bo
->bdev
;
494 struct ttm_bo_global
*glob
= bo
->glob
;
495 struct ttm_bo_driver
*driver
;
496 void *sync_obj
= NULL
;
501 spin_lock(&bdev
->fence_lock
);
502 (void) ttm_bo_wait(bo
, false, false, true);
505 spin_lock(&glob
->lru_lock
);
508 * Lock inversion between bo:reserve and bdev::fence_lock here,
509 * but that's OK, since we're only trylocking.
512 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
514 if (unlikely(ret
== -EBUSY
))
517 spin_unlock(&bdev
->fence_lock
);
518 put_count
= ttm_bo_del_from_lru(bo
);
520 spin_unlock(&glob
->lru_lock
);
521 ttm_bo_cleanup_memtype_use(bo
);
523 ttm_bo_list_ref_sub(bo
, put_count
, true);
527 spin_lock(&glob
->lru_lock
);
530 driver
= bdev
->driver
;
532 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
533 sync_obj_arg
= bo
->sync_obj_arg
;
535 kref_get(&bo
->list_kref
);
536 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
537 spin_unlock(&glob
->lru_lock
);
538 spin_unlock(&bdev
->fence_lock
);
541 driver
->sync_obj_flush(sync_obj
, sync_obj_arg
);
542 driver
->sync_obj_unref(&sync_obj
);
544 schedule_delayed_work(&bdev
->wq
,
545 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
549 * function ttm_bo_cleanup_refs
550 * If bo idle, remove from delayed- and lru lists, and unref.
551 * If not idle, do nothing.
553 * @interruptible Any sleeps should occur interruptibly.
554 * @no_wait_reserve Never wait for reserve. Return -EBUSY instead.
555 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
558 static int ttm_bo_cleanup_refs(struct ttm_buffer_object
*bo
,
560 bool no_wait_reserve
,
563 struct ttm_bo_device
*bdev
= bo
->bdev
;
564 struct ttm_bo_global
*glob
= bo
->glob
;
569 spin_lock(&bdev
->fence_lock
);
570 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
571 spin_unlock(&bdev
->fence_lock
);
573 if (unlikely(ret
!= 0))
576 spin_lock(&glob
->lru_lock
);
577 ret
= ttm_bo_reserve_locked(bo
, interruptible
,
578 no_wait_reserve
, false, 0);
580 if (unlikely(ret
!= 0) || list_empty(&bo
->ddestroy
)) {
581 spin_unlock(&glob
->lru_lock
);
586 * We can re-check for sync object without taking
587 * the bo::lock since setting the sync object requires
588 * also bo::reserved. A busy object at this point may
589 * be caused by another thread recently starting an accelerated
593 if (unlikely(bo
->sync_obj
)) {
594 atomic_set(&bo
->reserved
, 0);
595 wake_up_all(&bo
->event_queue
);
596 spin_unlock(&glob
->lru_lock
);
600 put_count
= ttm_bo_del_from_lru(bo
);
601 list_del_init(&bo
->ddestroy
);
604 spin_unlock(&glob
->lru_lock
);
605 ttm_bo_cleanup_memtype_use(bo
);
607 ttm_bo_list_ref_sub(bo
, put_count
, true);
613 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
614 * encountered buffers.
617 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
619 struct ttm_bo_global
*glob
= bdev
->glob
;
620 struct ttm_buffer_object
*entry
= NULL
;
623 spin_lock(&glob
->lru_lock
);
624 if (list_empty(&bdev
->ddestroy
))
627 entry
= list_first_entry(&bdev
->ddestroy
,
628 struct ttm_buffer_object
, ddestroy
);
629 kref_get(&entry
->list_kref
);
632 struct ttm_buffer_object
*nentry
= NULL
;
634 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
635 nentry
= list_first_entry(&entry
->ddestroy
,
636 struct ttm_buffer_object
, ddestroy
);
637 kref_get(&nentry
->list_kref
);
640 spin_unlock(&glob
->lru_lock
);
641 ret
= ttm_bo_cleanup_refs(entry
, false, !remove_all
,
643 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
649 spin_lock(&glob
->lru_lock
);
650 if (list_empty(&entry
->ddestroy
))
655 spin_unlock(&glob
->lru_lock
);
658 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
662 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
664 struct ttm_bo_device
*bdev
=
665 container_of(work
, struct ttm_bo_device
, wq
.work
);
667 if (ttm_bo_delayed_delete(bdev
, false)) {
668 schedule_delayed_work(&bdev
->wq
,
669 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
673 static void ttm_bo_release(struct kref
*kref
)
675 struct ttm_buffer_object
*bo
=
676 container_of(kref
, struct ttm_buffer_object
, kref
);
677 struct ttm_bo_device
*bdev
= bo
->bdev
;
678 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
680 if (likely(bo
->vm_node
!= NULL
)) {
681 rb_erase(&bo
->vm_rb
, &bdev
->addr_space_rb
);
682 drm_mm_put_block(bo
->vm_node
);
685 write_unlock(&bdev
->vm_lock
);
686 ttm_mem_io_lock(man
, false);
687 ttm_mem_io_free_vm(bo
);
688 ttm_mem_io_unlock(man
);
689 ttm_bo_cleanup_refs_or_queue(bo
);
690 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
691 write_lock(&bdev
->vm_lock
);
694 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
696 struct ttm_buffer_object
*bo
= *p_bo
;
697 struct ttm_bo_device
*bdev
= bo
->bdev
;
700 write_lock(&bdev
->vm_lock
);
701 kref_put(&bo
->kref
, ttm_bo_release
);
702 write_unlock(&bdev
->vm_lock
);
704 EXPORT_SYMBOL(ttm_bo_unref
);
706 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
708 return cancel_delayed_work_sync(&bdev
->wq
);
710 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
712 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
715 schedule_delayed_work(&bdev
->wq
,
716 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
718 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
720 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
721 bool no_wait_reserve
, bool no_wait_gpu
)
723 struct ttm_bo_device
*bdev
= bo
->bdev
;
724 struct ttm_mem_reg evict_mem
;
725 struct ttm_placement placement
;
728 spin_lock(&bdev
->fence_lock
);
729 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
730 spin_unlock(&bdev
->fence_lock
);
732 if (unlikely(ret
!= 0)) {
733 if (ret
!= -ERESTARTSYS
) {
734 printk(KERN_ERR TTM_PFX
735 "Failed to expire sync object before "
736 "buffer eviction.\n");
741 BUG_ON(!atomic_read(&bo
->reserved
));
744 evict_mem
.mm_node
= NULL
;
745 evict_mem
.bus
.io_reserved_vm
= false;
746 evict_mem
.bus
.io_reserved_count
= 0;
750 placement
.num_placement
= 0;
751 placement
.num_busy_placement
= 0;
752 bdev
->driver
->evict_flags(bo
, &placement
);
753 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
754 no_wait_reserve
, no_wait_gpu
);
756 if (ret
!= -ERESTARTSYS
) {
757 printk(KERN_ERR TTM_PFX
758 "Failed to find memory space for "
759 "buffer 0x%p eviction.\n", bo
);
760 ttm_bo_mem_space_debug(bo
, &placement
);
765 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
766 no_wait_reserve
, no_wait_gpu
);
768 if (ret
!= -ERESTARTSYS
)
769 printk(KERN_ERR TTM_PFX
"Buffer eviction failed\n");
770 ttm_bo_mem_put(bo
, &evict_mem
);
778 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
780 bool interruptible
, bool no_wait_reserve
,
783 struct ttm_bo_global
*glob
= bdev
->glob
;
784 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
785 struct ttm_buffer_object
*bo
;
786 int ret
, put_count
= 0;
789 spin_lock(&glob
->lru_lock
);
790 if (list_empty(&man
->lru
)) {
791 spin_unlock(&glob
->lru_lock
);
795 bo
= list_first_entry(&man
->lru
, struct ttm_buffer_object
, lru
);
796 kref_get(&bo
->list_kref
);
798 if (!list_empty(&bo
->ddestroy
)) {
799 spin_unlock(&glob
->lru_lock
);
800 ret
= ttm_bo_cleanup_refs(bo
, interruptible
,
801 no_wait_reserve
, no_wait_gpu
);
802 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
804 if (likely(ret
== 0 || ret
== -ERESTARTSYS
))
810 ret
= ttm_bo_reserve_locked(bo
, false, no_wait_reserve
, false, 0);
812 if (unlikely(ret
== -EBUSY
)) {
813 spin_unlock(&glob
->lru_lock
);
814 if (likely(!no_wait_gpu
))
815 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
817 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
820 * We *need* to retry after releasing the lru lock.
823 if (unlikely(ret
!= 0))
828 put_count
= ttm_bo_del_from_lru(bo
);
829 spin_unlock(&glob
->lru_lock
);
833 ttm_bo_list_ref_sub(bo
, put_count
, true);
835 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_reserve
, no_wait_gpu
);
836 ttm_bo_unreserve(bo
);
838 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
842 void ttm_bo_mem_put(struct ttm_buffer_object
*bo
, struct ttm_mem_reg
*mem
)
844 struct ttm_mem_type_manager
*man
= &bo
->bdev
->man
[mem
->mem_type
];
847 (*man
->func
->put_node
)(man
, mem
);
849 EXPORT_SYMBOL(ttm_bo_mem_put
);
852 * Repeatedly evict memory from the LRU for @mem_type until we create enough
853 * space, or we've evicted everything and there isn't enough space.
855 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
857 struct ttm_placement
*placement
,
858 struct ttm_mem_reg
*mem
,
860 bool no_wait_reserve
,
863 struct ttm_bo_device
*bdev
= bo
->bdev
;
864 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
868 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
869 if (unlikely(ret
!= 0))
873 ret
= ttm_mem_evict_first(bdev
, mem_type
, interruptible
,
874 no_wait_reserve
, no_wait_gpu
);
875 if (unlikely(ret
!= 0))
878 if (mem
->mm_node
== NULL
)
880 mem
->mem_type
= mem_type
;
884 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
885 uint32_t cur_placement
,
886 uint32_t proposed_placement
)
888 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
889 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
892 * Keep current caching if possible.
895 if ((cur_placement
& caching
) != 0)
896 result
|= (cur_placement
& caching
);
897 else if ((man
->default_caching
& caching
) != 0)
898 result
|= man
->default_caching
;
899 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
900 result
|= TTM_PL_FLAG_CACHED
;
901 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
902 result
|= TTM_PL_FLAG_WC
;
903 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
904 result
|= TTM_PL_FLAG_UNCACHED
;
909 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
912 uint32_t proposed_placement
,
913 uint32_t *masked_placement
)
915 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
917 if ((man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && disallow_fixed
)
920 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
923 if ((proposed_placement
& man
->available_caching
) == 0)
926 cur_flags
|= (proposed_placement
& man
->available_caching
);
928 *masked_placement
= cur_flags
;
933 * Creates space for memory region @mem according to its type.
935 * This function first searches for free space in compatible memory types in
936 * the priority order defined by the driver. If free space isn't found, then
937 * ttm_bo_mem_force_space is attempted in priority order to evict and find
940 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
941 struct ttm_placement
*placement
,
942 struct ttm_mem_reg
*mem
,
943 bool interruptible
, bool no_wait_reserve
,
946 struct ttm_bo_device
*bdev
= bo
->bdev
;
947 struct ttm_mem_type_manager
*man
;
948 uint32_t mem_type
= TTM_PL_SYSTEM
;
949 uint32_t cur_flags
= 0;
950 bool type_found
= false;
951 bool type_ok
= false;
952 bool has_erestartsys
= false;
956 for (i
= 0; i
< placement
->num_placement
; ++i
) {
957 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
961 man
= &bdev
->man
[mem_type
];
963 type_ok
= ttm_bo_mt_compatible(man
,
964 bo
->type
== ttm_bo_type_user
,
966 placement
->placement
[i
],
972 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
975 * Use the access and other non-mapping-related flag bits from
976 * the memory placement flags to the current flags
978 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
979 ~TTM_PL_MASK_MEMTYPE
);
981 if (mem_type
== TTM_PL_SYSTEM
)
984 if (man
->has_type
&& man
->use_type
) {
986 ret
= (*man
->func
->get_node
)(man
, bo
, placement
, mem
);
994 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || mem
->mm_node
) {
995 mem
->mem_type
= mem_type
;
996 mem
->placement
= cur_flags
;
1003 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
1004 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
1008 man
= &bdev
->man
[mem_type
];
1011 if (!ttm_bo_mt_compatible(man
,
1012 bo
->type
== ttm_bo_type_user
,
1014 placement
->busy_placement
[i
],
1018 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
1021 * Use the access and other non-mapping-related flag bits from
1022 * the memory placement flags to the current flags
1024 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
1025 ~TTM_PL_MASK_MEMTYPE
);
1028 if (mem_type
== TTM_PL_SYSTEM
) {
1029 mem
->mem_type
= mem_type
;
1030 mem
->placement
= cur_flags
;
1031 mem
->mm_node
= NULL
;
1035 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
1036 interruptible
, no_wait_reserve
, no_wait_gpu
);
1037 if (ret
== 0 && mem
->mm_node
) {
1038 mem
->placement
= cur_flags
;
1041 if (ret
== -ERESTARTSYS
)
1042 has_erestartsys
= true;
1044 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
1047 EXPORT_SYMBOL(ttm_bo_mem_space
);
1049 int ttm_bo_wait_cpu(struct ttm_buffer_object
*bo
, bool no_wait
)
1051 if ((atomic_read(&bo
->cpu_writers
) > 0) && no_wait
)
1054 return wait_event_interruptible(bo
->event_queue
,
1055 atomic_read(&bo
->cpu_writers
) == 0);
1057 EXPORT_SYMBOL(ttm_bo_wait_cpu
);
1059 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
1060 struct ttm_placement
*placement
,
1061 bool interruptible
, bool no_wait_reserve
,
1065 struct ttm_mem_reg mem
;
1066 struct ttm_bo_device
*bdev
= bo
->bdev
;
1068 BUG_ON(!atomic_read(&bo
->reserved
));
1071 * FIXME: It's possible to pipeline buffer moves.
1072 * Have the driver move function wait for idle when necessary,
1073 * instead of doing it here.
1075 spin_lock(&bdev
->fence_lock
);
1076 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
1077 spin_unlock(&bdev
->fence_lock
);
1080 mem
.num_pages
= bo
->num_pages
;
1081 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1082 mem
.page_alignment
= bo
->mem
.page_alignment
;
1083 mem
.bus
.io_reserved_vm
= false;
1084 mem
.bus
.io_reserved_count
= 0;
1086 * Determine where to move the buffer.
1088 ret
= ttm_bo_mem_space(bo
, placement
, &mem
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1091 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false, interruptible
, no_wait_reserve
, no_wait_gpu
);
1093 if (ret
&& mem
.mm_node
)
1094 ttm_bo_mem_put(bo
, &mem
);
1098 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
1099 struct ttm_mem_reg
*mem
)
1103 if (mem
->mm_node
&& placement
->lpfn
!= 0 &&
1104 (mem
->start
< placement
->fpfn
||
1105 mem
->start
+ mem
->num_pages
> placement
->lpfn
))
1108 for (i
= 0; i
< placement
->num_placement
; i
++) {
1109 if ((placement
->placement
[i
] & mem
->placement
&
1110 TTM_PL_MASK_CACHING
) &&
1111 (placement
->placement
[i
] & mem
->placement
&
1118 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1119 struct ttm_placement
*placement
,
1120 bool interruptible
, bool no_wait_reserve
,
1125 BUG_ON(!atomic_read(&bo
->reserved
));
1126 /* Check that range is valid */
1127 if (placement
->lpfn
|| placement
->fpfn
)
1128 if (placement
->fpfn
> placement
->lpfn
||
1129 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1132 * Check whether we need to move buffer.
1134 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1136 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1141 * Use the access and other non-mapping-related flag bits from
1142 * the compatible memory placement flags to the active flags
1144 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1145 ~TTM_PL_MASK_MEMTYPE
);
1148 * We might need to add a TTM.
1150 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1151 ret
= ttm_bo_add_ttm(bo
, true);
1157 EXPORT_SYMBOL(ttm_bo_validate
);
1159 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1160 struct ttm_placement
*placement
)
1162 BUG_ON((placement
->fpfn
|| placement
->lpfn
) &&
1163 (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)));
1168 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1169 struct ttm_buffer_object
*bo
,
1171 enum ttm_bo_type type
,
1172 struct ttm_placement
*placement
,
1173 uint32_t page_alignment
,
1174 unsigned long buffer_start
,
1176 struct file
*persistent_swap_storage
,
1178 void (*destroy
) (struct ttm_buffer_object
*))
1181 unsigned long num_pages
;
1183 size
+= buffer_start
& ~PAGE_MASK
;
1184 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1185 if (num_pages
== 0) {
1186 printk(KERN_ERR TTM_PFX
"Illegal buffer object size.\n");
1193 bo
->destroy
= destroy
;
1195 kref_init(&bo
->kref
);
1196 kref_init(&bo
->list_kref
);
1197 atomic_set(&bo
->cpu_writers
, 0);
1198 atomic_set(&bo
->reserved
, 1);
1199 init_waitqueue_head(&bo
->event_queue
);
1200 INIT_LIST_HEAD(&bo
->lru
);
1201 INIT_LIST_HEAD(&bo
->ddestroy
);
1202 INIT_LIST_HEAD(&bo
->swap
);
1203 INIT_LIST_HEAD(&bo
->io_reserve_lru
);
1205 bo
->glob
= bdev
->glob
;
1207 bo
->num_pages
= num_pages
;
1208 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1209 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1210 bo
->mem
.num_pages
= bo
->num_pages
;
1211 bo
->mem
.mm_node
= NULL
;
1212 bo
->mem
.page_alignment
= page_alignment
;
1213 bo
->mem
.bus
.io_reserved_vm
= false;
1214 bo
->mem
.bus
.io_reserved_count
= 0;
1215 bo
->buffer_start
= buffer_start
& PAGE_MASK
;
1217 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1218 bo
->seq_valid
= false;
1219 bo
->persistent_swap_storage
= persistent_swap_storage
;
1220 bo
->acc_size
= acc_size
;
1221 atomic_inc(&bo
->glob
->bo_count
);
1223 ret
= ttm_bo_check_placement(bo
, placement
);
1224 if (unlikely(ret
!= 0))
1228 * For ttm_bo_type_device buffers, allocate
1229 * address space from the device.
1231 if (bo
->type
== ttm_bo_type_device
) {
1232 ret
= ttm_bo_setup_vm(bo
);
1237 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false, false);
1241 ttm_bo_unreserve(bo
);
1245 ttm_bo_unreserve(bo
);
1250 EXPORT_SYMBOL(ttm_bo_init
);
1252 static inline size_t ttm_bo_size(struct ttm_bo_global
*glob
,
1253 unsigned long num_pages
)
1255 size_t page_array_size
= (num_pages
* sizeof(void *) + PAGE_SIZE
- 1) &
1258 return glob
->ttm_bo_size
+ 2 * page_array_size
;
1261 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1263 enum ttm_bo_type type
,
1264 struct ttm_placement
*placement
,
1265 uint32_t page_alignment
,
1266 unsigned long buffer_start
,
1268 struct file
*persistent_swap_storage
,
1269 struct ttm_buffer_object
**p_bo
)
1271 struct ttm_buffer_object
*bo
;
1272 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1276 ttm_bo_size(bdev
->glob
, (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
);
1277 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1278 if (unlikely(ret
!= 0))
1281 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1283 if (unlikely(bo
== NULL
)) {
1284 ttm_mem_global_free(mem_glob
, acc_size
);
1288 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1289 buffer_start
, interruptible
,
1290 persistent_swap_storage
, acc_size
, NULL
);
1291 if (likely(ret
== 0))
1297 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1298 unsigned mem_type
, bool allow_errors
)
1300 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1301 struct ttm_bo_global
*glob
= bdev
->glob
;
1305 * Can't use standard list traversal since we're unlocking.
1308 spin_lock(&glob
->lru_lock
);
1309 while (!list_empty(&man
->lru
)) {
1310 spin_unlock(&glob
->lru_lock
);
1311 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false, false);
1316 printk(KERN_ERR TTM_PFX
1317 "Cleanup eviction failed\n");
1320 spin_lock(&glob
->lru_lock
);
1322 spin_unlock(&glob
->lru_lock
);
1326 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1328 struct ttm_mem_type_manager
*man
;
1331 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1332 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", mem_type
);
1335 man
= &bdev
->man
[mem_type
];
1337 if (!man
->has_type
) {
1338 printk(KERN_ERR TTM_PFX
"Trying to take down uninitialized "
1339 "memory manager type %u\n", mem_type
);
1343 man
->use_type
= false;
1344 man
->has_type
= false;
1348 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1350 ret
= (*man
->func
->takedown
)(man
);
1355 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1357 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1359 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1361 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1362 printk(KERN_ERR TTM_PFX
1363 "Illegal memory manager memory type %u.\n",
1368 if (!man
->has_type
) {
1369 printk(KERN_ERR TTM_PFX
1370 "Memory type %u has not been initialized.\n",
1375 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1377 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1379 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1380 unsigned long p_size
)
1383 struct ttm_mem_type_manager
*man
;
1385 BUG_ON(type
>= TTM_NUM_MEM_TYPES
);
1386 man
= &bdev
->man
[type
];
1387 BUG_ON(man
->has_type
);
1388 man
->io_reserve_fastpath
= true;
1389 man
->use_io_reserve_lru
= false;
1390 mutex_init(&man
->io_reserve_mutex
);
1391 INIT_LIST_HEAD(&man
->io_reserve_lru
);
1393 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1399 if (type
!= TTM_PL_SYSTEM
) {
1400 ret
= (*man
->func
->init
)(man
, p_size
);
1404 man
->has_type
= true;
1405 man
->use_type
= true;
1408 INIT_LIST_HEAD(&man
->lru
);
1412 EXPORT_SYMBOL(ttm_bo_init_mm
);
1414 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1416 struct ttm_bo_global
*glob
=
1417 container_of(kobj
, struct ttm_bo_global
, kobj
);
1419 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1420 __free_page(glob
->dummy_read_page
);
1424 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1426 struct ttm_bo_global
*glob
= ref
->object
;
1428 kobject_del(&glob
->kobj
);
1429 kobject_put(&glob
->kobj
);
1431 EXPORT_SYMBOL(ttm_bo_global_release
);
1433 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1435 struct ttm_bo_global_ref
*bo_ref
=
1436 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1437 struct ttm_bo_global
*glob
= ref
->object
;
1440 mutex_init(&glob
->device_list_mutex
);
1441 spin_lock_init(&glob
->lru_lock
);
1442 glob
->mem_glob
= bo_ref
->mem_glob
;
1443 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1445 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1450 INIT_LIST_HEAD(&glob
->swap_lru
);
1451 INIT_LIST_HEAD(&glob
->device_list
);
1453 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1454 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1455 if (unlikely(ret
!= 0)) {
1456 printk(KERN_ERR TTM_PFX
1457 "Could not register buffer object swapout.\n");
1461 glob
->ttm_bo_extra_size
=
1462 ttm_round_pot(sizeof(struct ttm_tt
)) +
1463 ttm_round_pot(sizeof(struct ttm_backend
));
1465 glob
->ttm_bo_size
= glob
->ttm_bo_extra_size
+
1466 ttm_round_pot(sizeof(struct ttm_buffer_object
));
1468 atomic_set(&glob
->bo_count
, 0);
1470 ret
= kobject_init_and_add(
1471 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1472 if (unlikely(ret
!= 0))
1473 kobject_put(&glob
->kobj
);
1476 __free_page(glob
->dummy_read_page
);
1481 EXPORT_SYMBOL(ttm_bo_global_init
);
1484 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1487 unsigned i
= TTM_NUM_MEM_TYPES
;
1488 struct ttm_mem_type_manager
*man
;
1489 struct ttm_bo_global
*glob
= bdev
->glob
;
1492 man
= &bdev
->man
[i
];
1493 if (man
->has_type
) {
1494 man
->use_type
= false;
1495 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1497 printk(KERN_ERR TTM_PFX
1498 "DRM memory manager type %d "
1499 "is not clean.\n", i
);
1501 man
->has_type
= false;
1505 mutex_lock(&glob
->device_list_mutex
);
1506 list_del(&bdev
->device_list
);
1507 mutex_unlock(&glob
->device_list_mutex
);
1509 cancel_delayed_work_sync(&bdev
->wq
);
1511 while (ttm_bo_delayed_delete(bdev
, true))
1514 spin_lock(&glob
->lru_lock
);
1515 if (list_empty(&bdev
->ddestroy
))
1516 TTM_DEBUG("Delayed destroy list was clean\n");
1518 if (list_empty(&bdev
->man
[0].lru
))
1519 TTM_DEBUG("Swap list was clean\n");
1520 spin_unlock(&glob
->lru_lock
);
1522 BUG_ON(!drm_mm_clean(&bdev
->addr_space_mm
));
1523 write_lock(&bdev
->vm_lock
);
1524 drm_mm_takedown(&bdev
->addr_space_mm
);
1525 write_unlock(&bdev
->vm_lock
);
1529 EXPORT_SYMBOL(ttm_bo_device_release
);
1531 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1532 struct ttm_bo_global
*glob
,
1533 struct ttm_bo_driver
*driver
,
1534 uint64_t file_page_offset
,
1539 rwlock_init(&bdev
->vm_lock
);
1540 bdev
->driver
= driver
;
1542 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1545 * Initialize the system memory buffer type.
1546 * Other types need to be driver / IOCTL initialized.
1548 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1549 if (unlikely(ret
!= 0))
1552 bdev
->addr_space_rb
= RB_ROOT
;
1553 ret
= drm_mm_init(&bdev
->addr_space_mm
, file_page_offset
, 0x10000000);
1554 if (unlikely(ret
!= 0))
1555 goto out_no_addr_mm
;
1557 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1558 bdev
->nice_mode
= true;
1559 INIT_LIST_HEAD(&bdev
->ddestroy
);
1560 bdev
->dev_mapping
= NULL
;
1562 bdev
->need_dma32
= need_dma32
;
1564 spin_lock_init(&bdev
->fence_lock
);
1565 mutex_lock(&glob
->device_list_mutex
);
1566 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1567 mutex_unlock(&glob
->device_list_mutex
);
1571 ttm_bo_clean_mm(bdev
, 0);
1575 EXPORT_SYMBOL(ttm_bo_device_init
);
1578 * buffer object vm functions.
1581 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1583 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1585 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1586 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1589 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1592 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1598 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object
*bo
)
1600 struct ttm_bo_device
*bdev
= bo
->bdev
;
1601 loff_t offset
= (loff_t
) bo
->addr_space_offset
;
1602 loff_t holelen
= ((loff_t
) bo
->mem
.num_pages
) << PAGE_SHIFT
;
1604 if (!bdev
->dev_mapping
)
1606 unmap_mapping_range(bdev
->dev_mapping
, offset
, holelen
, 1);
1607 ttm_mem_io_free_vm(bo
);
1610 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1612 struct ttm_bo_device
*bdev
= bo
->bdev
;
1613 struct ttm_mem_type_manager
*man
= &bdev
->man
[bo
->mem
.mem_type
];
1615 ttm_mem_io_lock(man
, false);
1616 ttm_bo_unmap_virtual_locked(bo
);
1617 ttm_mem_io_unlock(man
);
1621 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1623 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object
*bo
)
1625 struct ttm_bo_device
*bdev
= bo
->bdev
;
1626 struct rb_node
**cur
= &bdev
->addr_space_rb
.rb_node
;
1627 struct rb_node
*parent
= NULL
;
1628 struct ttm_buffer_object
*cur_bo
;
1629 unsigned long offset
= bo
->vm_node
->start
;
1630 unsigned long cur_offset
;
1634 cur_bo
= rb_entry(parent
, struct ttm_buffer_object
, vm_rb
);
1635 cur_offset
= cur_bo
->vm_node
->start
;
1636 if (offset
< cur_offset
)
1637 cur
= &parent
->rb_left
;
1638 else if (offset
> cur_offset
)
1639 cur
= &parent
->rb_right
;
1644 rb_link_node(&bo
->vm_rb
, parent
, cur
);
1645 rb_insert_color(&bo
->vm_rb
, &bdev
->addr_space_rb
);
1651 * @bo: the buffer to allocate address space for
1653 * Allocate address space in the drm device so that applications
1654 * can mmap the buffer and access the contents. This only
1655 * applies to ttm_bo_type_device objects as others are not
1656 * placed in the drm device address space.
1659 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1661 struct ttm_bo_device
*bdev
= bo
->bdev
;
1665 ret
= drm_mm_pre_get(&bdev
->addr_space_mm
);
1666 if (unlikely(ret
!= 0))
1669 write_lock(&bdev
->vm_lock
);
1670 bo
->vm_node
= drm_mm_search_free(&bdev
->addr_space_mm
,
1671 bo
->mem
.num_pages
, 0, 0);
1673 if (unlikely(bo
->vm_node
== NULL
)) {
1678 bo
->vm_node
= drm_mm_get_block_atomic(bo
->vm_node
,
1679 bo
->mem
.num_pages
, 0);
1681 if (unlikely(bo
->vm_node
== NULL
)) {
1682 write_unlock(&bdev
->vm_lock
);
1686 ttm_bo_vm_insert_rb(bo
);
1687 write_unlock(&bdev
->vm_lock
);
1688 bo
->addr_space_offset
= ((uint64_t) bo
->vm_node
->start
) << PAGE_SHIFT
;
1692 write_unlock(&bdev
->vm_lock
);
1696 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1697 bool lazy
, bool interruptible
, bool no_wait
)
1699 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1700 struct ttm_bo_device
*bdev
= bo
->bdev
;
1705 if (likely(bo
->sync_obj
== NULL
))
1708 while (bo
->sync_obj
) {
1710 if (driver
->sync_obj_signaled(bo
->sync_obj
, bo
->sync_obj_arg
)) {
1711 void *tmp_obj
= bo
->sync_obj
;
1712 bo
->sync_obj
= NULL
;
1713 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1714 spin_unlock(&bdev
->fence_lock
);
1715 driver
->sync_obj_unref(&tmp_obj
);
1716 spin_lock(&bdev
->fence_lock
);
1723 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1724 sync_obj_arg
= bo
->sync_obj_arg
;
1725 spin_unlock(&bdev
->fence_lock
);
1726 ret
= driver
->sync_obj_wait(sync_obj
, sync_obj_arg
,
1727 lazy
, interruptible
);
1728 if (unlikely(ret
!= 0)) {
1729 driver
->sync_obj_unref(&sync_obj
);
1730 spin_lock(&bdev
->fence_lock
);
1733 spin_lock(&bdev
->fence_lock
);
1734 if (likely(bo
->sync_obj
== sync_obj
&&
1735 bo
->sync_obj_arg
== sync_obj_arg
)) {
1736 void *tmp_obj
= bo
->sync_obj
;
1737 bo
->sync_obj
= NULL
;
1738 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1740 spin_unlock(&bdev
->fence_lock
);
1741 driver
->sync_obj_unref(&sync_obj
);
1742 driver
->sync_obj_unref(&tmp_obj
);
1743 spin_lock(&bdev
->fence_lock
);
1745 spin_unlock(&bdev
->fence_lock
);
1746 driver
->sync_obj_unref(&sync_obj
);
1747 spin_lock(&bdev
->fence_lock
);
1752 EXPORT_SYMBOL(ttm_bo_wait
);
1754 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1756 struct ttm_bo_device
*bdev
= bo
->bdev
;
1760 * Using ttm_bo_reserve makes sure the lru lists are updated.
1763 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1764 if (unlikely(ret
!= 0))
1766 spin_lock(&bdev
->fence_lock
);
1767 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1768 spin_unlock(&bdev
->fence_lock
);
1769 if (likely(ret
== 0))
1770 atomic_inc(&bo
->cpu_writers
);
1771 ttm_bo_unreserve(bo
);
1774 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1776 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1778 if (atomic_dec_and_test(&bo
->cpu_writers
))
1779 wake_up_all(&bo
->event_queue
);
1781 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1784 * A buffer object shrink method that tries to swap out the first
1785 * buffer object on the bo_global::swap_lru list.
1788 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1790 struct ttm_bo_global
*glob
=
1791 container_of(shrink
, struct ttm_bo_global
, shrink
);
1792 struct ttm_buffer_object
*bo
;
1795 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1797 spin_lock(&glob
->lru_lock
);
1798 while (ret
== -EBUSY
) {
1799 if (unlikely(list_empty(&glob
->swap_lru
))) {
1800 spin_unlock(&glob
->lru_lock
);
1804 bo
= list_first_entry(&glob
->swap_lru
,
1805 struct ttm_buffer_object
, swap
);
1806 kref_get(&bo
->list_kref
);
1808 if (!list_empty(&bo
->ddestroy
)) {
1809 spin_unlock(&glob
->lru_lock
);
1810 (void) ttm_bo_cleanup_refs(bo
, false, false, false);
1811 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1816 * Reserve buffer. Since we unlock while sleeping, we need
1817 * to re-check that nobody removed us from the swap-list while
1821 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
1822 if (unlikely(ret
== -EBUSY
)) {
1823 spin_unlock(&glob
->lru_lock
);
1824 ttm_bo_wait_unreserved(bo
, false);
1825 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1826 spin_lock(&glob
->lru_lock
);
1831 put_count
= ttm_bo_del_from_lru(bo
);
1832 spin_unlock(&glob
->lru_lock
);
1834 ttm_bo_list_ref_sub(bo
, put_count
, true);
1837 * Wait for GPU, then move to system cached.
1840 spin_lock(&bo
->bdev
->fence_lock
);
1841 ret
= ttm_bo_wait(bo
, false, false, false);
1842 spin_unlock(&bo
->bdev
->fence_lock
);
1844 if (unlikely(ret
!= 0))
1847 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1848 struct ttm_mem_reg evict_mem
;
1850 evict_mem
= bo
->mem
;
1851 evict_mem
.mm_node
= NULL
;
1852 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1853 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1855 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1856 false, false, false);
1857 if (unlikely(ret
!= 0))
1861 ttm_bo_unmap_virtual(bo
);
1864 * Swap out. Buffer will be swapped in again as soon as
1865 * anyone tries to access a ttm page.
1868 if (bo
->bdev
->driver
->swap_notify
)
1869 bo
->bdev
->driver
->swap_notify(bo
);
1871 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistent_swap_storage
);
1876 * Unreserve without putting on LRU to avoid swapping out an
1877 * already swapped buffer.
1880 atomic_set(&bo
->reserved
, 0);
1881 wake_up_all(&bo
->event_queue
);
1882 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1886 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1888 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1891 EXPORT_SYMBOL(ttm_bo_swapout_all
);