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>
32 * We store bo pointer in drm_mm_node struct so we know which bo own a
33 * specific node. There is no protection on the pointer, thus to make
34 * sure things don't go berserk you have to access this pointer while
35 * holding the global lru lock and make sure anytime you free a node you
36 * reset the pointer to NULL.
39 #include "ttm/ttm_module.h"
40 #include "ttm/ttm_bo_driver.h"
41 #include "ttm/ttm_placement.h"
42 #include <linux/jiffies.h>
43 #include <linux/slab.h>
44 #include <linux/sched.h>
46 #include <linux/file.h>
47 #include <linux/module.h>
49 #define TTM_ASSERT_LOCKED(param)
50 #define TTM_DEBUG(fmt, arg...)
51 #define TTM_BO_HASH_ORDER 13
53 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
);
54 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
);
55 static void ttm_bo_global_kobj_release(struct kobject
*kobj
);
57 static struct attribute ttm_bo_count
= {
62 static inline int ttm_mem_type_from_flags(uint32_t flags
, uint32_t *mem_type
)
66 for (i
= 0; i
<= TTM_PL_PRIV5
; i
++)
67 if (flags
& (1 << i
)) {
74 static void ttm_mem_type_debug(struct ttm_bo_device
*bdev
, int mem_type
)
76 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
78 printk(KERN_ERR TTM_PFX
" has_type: %d\n", man
->has_type
);
79 printk(KERN_ERR TTM_PFX
" use_type: %d\n", man
->use_type
);
80 printk(KERN_ERR TTM_PFX
" flags: 0x%08X\n", man
->flags
);
81 printk(KERN_ERR TTM_PFX
" gpu_offset: 0x%08lX\n", man
->gpu_offset
);
82 printk(KERN_ERR TTM_PFX
" size: %llu\n", man
->size
);
83 printk(KERN_ERR TTM_PFX
" available_caching: 0x%08X\n",
84 man
->available_caching
);
85 printk(KERN_ERR TTM_PFX
" default_caching: 0x%08X\n",
86 man
->default_caching
);
87 if (mem_type
!= TTM_PL_SYSTEM
) {
88 spin_lock(&bdev
->glob
->lru_lock
);
89 drm_mm_debug_table(&man
->manager
, TTM_PFX
);
90 spin_unlock(&bdev
->glob
->lru_lock
);
94 static void ttm_bo_mem_space_debug(struct ttm_buffer_object
*bo
,
95 struct ttm_placement
*placement
)
99 printk(KERN_ERR TTM_PFX
"No space for %p (%lu pages, %luK, %luM)\n",
100 bo
, bo
->mem
.num_pages
, bo
->mem
.size
>> 10,
102 for (i
= 0; i
< placement
->num_placement
; i
++) {
103 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
107 printk(KERN_ERR TTM_PFX
" placement[%d]=0x%08X (%d)\n",
108 i
, placement
->placement
[i
], mem_type
);
109 ttm_mem_type_debug(bo
->bdev
, mem_type
);
113 static ssize_t
ttm_bo_global_show(struct kobject
*kobj
,
114 struct attribute
*attr
,
117 struct ttm_bo_global
*glob
=
118 container_of(kobj
, struct ttm_bo_global
, kobj
);
120 return snprintf(buffer
, PAGE_SIZE
, "%lu\n",
121 (unsigned long) atomic_read(&glob
->bo_count
));
124 static struct attribute
*ttm_bo_global_attrs
[] = {
129 static const struct sysfs_ops ttm_bo_global_ops
= {
130 .show
= &ttm_bo_global_show
133 static struct kobj_type ttm_bo_glob_kobj_type
= {
134 .release
= &ttm_bo_global_kobj_release
,
135 .sysfs_ops
= &ttm_bo_global_ops
,
136 .default_attrs
= ttm_bo_global_attrs
140 static inline uint32_t ttm_bo_type_flags(unsigned type
)
145 static void ttm_bo_release_list(struct kref
*list_kref
)
147 struct ttm_buffer_object
*bo
=
148 container_of(list_kref
, struct ttm_buffer_object
, list_kref
);
149 struct ttm_bo_device
*bdev
= bo
->bdev
;
151 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
152 BUG_ON(atomic_read(&bo
->kref
.refcount
));
153 BUG_ON(atomic_read(&bo
->cpu_writers
));
154 BUG_ON(bo
->sync_obj
!= NULL
);
155 BUG_ON(bo
->mem
.mm_node
!= NULL
);
156 BUG_ON(!list_empty(&bo
->lru
));
157 BUG_ON(!list_empty(&bo
->ddestroy
));
160 ttm_tt_destroy(bo
->ttm
);
161 atomic_dec(&bo
->glob
->bo_count
);
165 ttm_mem_global_free(bdev
->glob
->mem_glob
, bo
->acc_size
);
170 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
, bool interruptible
)
176 ret
= wait_event_interruptible(bo
->event_queue
,
177 atomic_read(&bo
->reserved
) == 0);
178 if (unlikely(ret
!= 0))
181 wait_event(bo
->event_queue
, atomic_read(&bo
->reserved
) == 0);
185 EXPORT_SYMBOL(ttm_bo_wait_unreserved
);
187 static void ttm_bo_add_to_lru(struct ttm_buffer_object
*bo
)
189 struct ttm_bo_device
*bdev
= bo
->bdev
;
190 struct ttm_mem_type_manager
*man
;
192 BUG_ON(!atomic_read(&bo
->reserved
));
194 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
196 BUG_ON(!list_empty(&bo
->lru
));
198 man
= &bdev
->man
[bo
->mem
.mem_type
];
199 list_add_tail(&bo
->lru
, &man
->lru
);
200 kref_get(&bo
->list_kref
);
202 if (bo
->ttm
!= NULL
) {
203 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
204 kref_get(&bo
->list_kref
);
210 * Call with the lru_lock held.
213 static int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
217 if (!list_empty(&bo
->swap
)) {
218 list_del_init(&bo
->swap
);
221 if (!list_empty(&bo
->lru
)) {
222 list_del_init(&bo
->lru
);
227 * TODO: Add a driver hook to delete from
228 * driver-specific LRU's here.
234 int ttm_bo_reserve_locked(struct ttm_buffer_object
*bo
,
236 bool no_wait
, bool use_sequence
, uint32_t sequence
)
238 struct ttm_bo_global
*glob
= bo
->glob
;
241 while (unlikely(atomic_cmpxchg(&bo
->reserved
, 0, 1) != 0)) {
242 if (use_sequence
&& bo
->seq_valid
&&
243 (sequence
- bo
->val_seq
< (1 << 31))) {
250 spin_unlock(&glob
->lru_lock
);
251 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
252 spin_lock(&glob
->lru_lock
);
259 bo
->val_seq
= sequence
;
260 bo
->seq_valid
= true;
262 bo
->seq_valid
= false;
267 EXPORT_SYMBOL(ttm_bo_reserve
);
269 static void ttm_bo_ref_bug(struct kref
*list_kref
)
274 int ttm_bo_reserve(struct ttm_buffer_object
*bo
,
276 bool no_wait
, bool use_sequence
, uint32_t sequence
)
278 struct ttm_bo_global
*glob
= bo
->glob
;
282 spin_lock(&glob
->lru_lock
);
283 ret
= ttm_bo_reserve_locked(bo
, interruptible
, no_wait
, use_sequence
,
285 if (likely(ret
== 0))
286 put_count
= ttm_bo_del_from_lru(bo
);
287 spin_unlock(&glob
->lru_lock
);
290 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
295 void ttm_bo_unreserve(struct ttm_buffer_object
*bo
)
297 struct ttm_bo_global
*glob
= bo
->glob
;
299 spin_lock(&glob
->lru_lock
);
300 ttm_bo_add_to_lru(bo
);
301 atomic_set(&bo
->reserved
, 0);
302 wake_up_all(&bo
->event_queue
);
303 spin_unlock(&glob
->lru_lock
);
305 EXPORT_SYMBOL(ttm_bo_unreserve
);
308 * Call bo->mutex locked.
310 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
312 struct ttm_bo_device
*bdev
= bo
->bdev
;
313 struct ttm_bo_global
*glob
= bo
->glob
;
315 uint32_t page_flags
= 0;
317 TTM_ASSERT_LOCKED(&bo
->mutex
);
320 if (bdev
->need_dma32
)
321 page_flags
|= TTM_PAGE_FLAG_DMA32
;
324 case ttm_bo_type_device
:
326 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
327 case ttm_bo_type_kernel
:
328 bo
->ttm
= ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
329 page_flags
, glob
->dummy_read_page
);
330 if (unlikely(bo
->ttm
== NULL
))
333 case ttm_bo_type_user
:
334 bo
->ttm
= ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
335 page_flags
| TTM_PAGE_FLAG_USER
,
336 glob
->dummy_read_page
);
337 if (unlikely(bo
->ttm
== NULL
)) {
342 ret
= ttm_tt_set_user(bo
->ttm
, current
,
343 bo
->buffer_start
, bo
->num_pages
);
344 if (unlikely(ret
!= 0))
345 ttm_tt_destroy(bo
->ttm
);
348 printk(KERN_ERR TTM_PFX
"Illegal buffer object type\n");
356 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
357 struct ttm_mem_reg
*mem
,
358 bool evict
, bool interruptible
,
359 bool no_wait_reserve
, bool no_wait_gpu
)
361 struct ttm_bo_device
*bdev
= bo
->bdev
;
362 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
363 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
364 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
365 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
368 if (old_is_pci
|| new_is_pci
||
369 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0))
370 ttm_bo_unmap_virtual(bo
);
373 * Create and bind a ttm if required.
376 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && (bo
->ttm
== NULL
)) {
377 ret
= ttm_bo_add_ttm(bo
, false);
381 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
385 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
386 ret
= ttm_tt_bind(bo
->ttm
, mem
);
391 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
399 if (bdev
->driver
->move_notify
)
400 bdev
->driver
->move_notify(bo
, mem
);
402 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
403 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
404 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait_reserve
, no_wait_gpu
, mem
);
405 else if (bdev
->driver
->move
)
406 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
407 no_wait_reserve
, no_wait_gpu
, mem
);
409 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait_reserve
, no_wait_gpu
, mem
);
416 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
418 printk(KERN_ERR TTM_PFX
"Can not flush read caches\n");
422 if (bo
->mem
.mm_node
) {
423 spin_lock(&bo
->lock
);
424 bo
->offset
= (bo
->mem
.mm_node
->start
<< PAGE_SHIFT
) +
425 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
426 bo
->cur_placement
= bo
->mem
.placement
;
427 spin_unlock(&bo
->lock
);
434 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
435 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
436 ttm_tt_unbind(bo
->ttm
);
437 ttm_tt_destroy(bo
->ttm
);
445 * Call bo::reserved and with the lru lock held.
446 * Will release GPU memory type usage on destruction.
447 * This is the place to put in driver specific hooks.
448 * Will release the bo::reserved lock and the
452 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object
*bo
)
454 struct ttm_bo_global
*glob
= bo
->glob
;
459 * Release the lru_lock, since we don't want to have
460 * an atomic requirement on ttm_tt[unbind|destroy].
463 spin_unlock(&glob
->lru_lock
);
464 ttm_tt_unbind(bo
->ttm
);
465 ttm_tt_destroy(bo
->ttm
);
467 spin_lock(&glob
->lru_lock
);
470 if (bo
->mem
.mm_node
) {
471 drm_mm_put_block(bo
->mem
.mm_node
);
472 bo
->mem
.mm_node
= NULL
;
475 atomic_set(&bo
->reserved
, 0);
476 wake_up_all(&bo
->event_queue
);
477 spin_unlock(&glob
->lru_lock
);
482 * If bo idle, remove from delayed- and lru lists, and unref.
483 * If not idle, and already on delayed list, do nothing.
484 * If not idle, and not on delayed list, put on delayed list,
485 * up the list_kref and schedule a delayed list check.
488 static int ttm_bo_cleanup_refs(struct ttm_buffer_object
*bo
, bool remove_all
)
490 struct ttm_bo_device
*bdev
= bo
->bdev
;
491 struct ttm_bo_global
*glob
= bo
->glob
;
492 struct ttm_bo_driver
*driver
= bdev
->driver
;
495 spin_lock(&bo
->lock
);
497 (void) ttm_bo_wait(bo
, false, false, !remove_all
);
502 spin_unlock(&bo
->lock
);
504 spin_lock(&glob
->lru_lock
);
505 ret
= ttm_bo_reserve_locked(bo
, false, !remove_all
, false, 0);
508 * Someone else has the object reserved. Bail and retry.
511 if (unlikely(ret
== -EBUSY
)) {
512 spin_unlock(&glob
->lru_lock
);
513 spin_lock(&bo
->lock
);
518 * We can re-check for sync object without taking
519 * the bo::lock since setting the sync object requires
520 * also bo::reserved. A busy object at this point may
521 * be caused by another thread starting an accelerated
525 if (unlikely(bo
->sync_obj
)) {
526 atomic_set(&bo
->reserved
, 0);
527 wake_up_all(&bo
->event_queue
);
528 spin_unlock(&glob
->lru_lock
);
529 spin_lock(&bo
->lock
);
536 put_count
= ttm_bo_del_from_lru(bo
);
538 if (!list_empty(&bo
->ddestroy
)) {
539 list_del_init(&bo
->ddestroy
);
543 ttm_bo_cleanup_memtype_use(bo
);
546 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
551 spin_lock(&glob
->lru_lock
);
552 if (list_empty(&bo
->ddestroy
)) {
553 void *sync_obj
= bo
->sync_obj
;
554 void *sync_obj_arg
= bo
->sync_obj_arg
;
556 kref_get(&bo
->list_kref
);
557 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
558 spin_unlock(&glob
->lru_lock
);
559 spin_unlock(&bo
->lock
);
562 driver
->sync_obj_flush(sync_obj
, sync_obj_arg
);
563 schedule_delayed_work(&bdev
->wq
,
564 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
568 spin_unlock(&glob
->lru_lock
);
569 spin_unlock(&bo
->lock
);
577 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
578 * encountered buffers.
581 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
583 struct ttm_bo_global
*glob
= bdev
->glob
;
584 struct ttm_buffer_object
*entry
= NULL
;
587 spin_lock(&glob
->lru_lock
);
588 if (list_empty(&bdev
->ddestroy
))
591 entry
= list_first_entry(&bdev
->ddestroy
,
592 struct ttm_buffer_object
, ddestroy
);
593 kref_get(&entry
->list_kref
);
596 struct ttm_buffer_object
*nentry
= NULL
;
598 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
599 nentry
= list_first_entry(&entry
->ddestroy
,
600 struct ttm_buffer_object
, ddestroy
);
601 kref_get(&nentry
->list_kref
);
604 spin_unlock(&glob
->lru_lock
);
605 ret
= ttm_bo_cleanup_refs(entry
, remove_all
);
606 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
612 spin_lock(&glob
->lru_lock
);
613 if (list_empty(&entry
->ddestroy
))
618 spin_unlock(&glob
->lru_lock
);
621 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
625 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
627 struct ttm_bo_device
*bdev
=
628 container_of(work
, struct ttm_bo_device
, wq
.work
);
630 if (ttm_bo_delayed_delete(bdev
, false)) {
631 schedule_delayed_work(&bdev
->wq
,
632 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
636 static void ttm_bo_release(struct kref
*kref
)
638 struct ttm_buffer_object
*bo
=
639 container_of(kref
, struct ttm_buffer_object
, kref
);
640 struct ttm_bo_device
*bdev
= bo
->bdev
;
642 if (likely(bo
->vm_node
!= NULL
)) {
643 rb_erase(&bo
->vm_rb
, &bdev
->addr_space_rb
);
644 drm_mm_put_block(bo
->vm_node
);
647 write_unlock(&bdev
->vm_lock
);
648 ttm_bo_cleanup_refs(bo
, false);
649 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
650 write_lock(&bdev
->vm_lock
);
653 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
655 struct ttm_buffer_object
*bo
= *p_bo
;
656 struct ttm_bo_device
*bdev
= bo
->bdev
;
659 write_lock(&bdev
->vm_lock
);
660 kref_put(&bo
->kref
, ttm_bo_release
);
661 write_unlock(&bdev
->vm_lock
);
663 EXPORT_SYMBOL(ttm_bo_unref
);
665 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
667 return cancel_delayed_work_sync(&bdev
->wq
);
669 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
671 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
674 schedule_delayed_work(&bdev
->wq
,
675 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
677 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
679 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
680 bool no_wait_reserve
, bool no_wait_gpu
)
682 struct ttm_bo_device
*bdev
= bo
->bdev
;
683 struct ttm_bo_global
*glob
= bo
->glob
;
684 struct ttm_mem_reg evict_mem
;
685 struct ttm_placement placement
;
688 spin_lock(&bo
->lock
);
689 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
690 spin_unlock(&bo
->lock
);
692 if (unlikely(ret
!= 0)) {
693 if (ret
!= -ERESTARTSYS
) {
694 printk(KERN_ERR TTM_PFX
695 "Failed to expire sync object before "
696 "buffer eviction.\n");
701 BUG_ON(!atomic_read(&bo
->reserved
));
704 evict_mem
.mm_node
= NULL
;
705 evict_mem
.bus
.io_reserved
= false;
709 placement
.num_placement
= 0;
710 placement
.num_busy_placement
= 0;
711 bdev
->driver
->evict_flags(bo
, &placement
);
712 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
713 no_wait_reserve
, no_wait_gpu
);
715 if (ret
!= -ERESTARTSYS
) {
716 printk(KERN_ERR TTM_PFX
717 "Failed to find memory space for "
718 "buffer 0x%p eviction.\n", bo
);
719 ttm_bo_mem_space_debug(bo
, &placement
);
724 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
725 no_wait_reserve
, no_wait_gpu
);
727 if (ret
!= -ERESTARTSYS
)
728 printk(KERN_ERR TTM_PFX
"Buffer eviction failed\n");
729 spin_lock(&glob
->lru_lock
);
730 if (evict_mem
.mm_node
) {
731 drm_mm_put_block(evict_mem
.mm_node
);
732 evict_mem
.mm_node
= NULL
;
734 spin_unlock(&glob
->lru_lock
);
742 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
744 bool interruptible
, bool no_wait_reserve
,
747 struct ttm_bo_global
*glob
= bdev
->glob
;
748 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
749 struct ttm_buffer_object
*bo
;
750 int ret
, put_count
= 0;
753 spin_lock(&glob
->lru_lock
);
754 if (list_empty(&man
->lru
)) {
755 spin_unlock(&glob
->lru_lock
);
759 bo
= list_first_entry(&man
->lru
, struct ttm_buffer_object
, lru
);
760 kref_get(&bo
->list_kref
);
762 ret
= ttm_bo_reserve_locked(bo
, false, no_wait_reserve
, false, 0);
764 if (unlikely(ret
== -EBUSY
)) {
765 spin_unlock(&glob
->lru_lock
);
766 if (likely(!no_wait_gpu
))
767 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
769 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
772 * We *need* to retry after releasing the lru lock.
775 if (unlikely(ret
!= 0))
780 put_count
= ttm_bo_del_from_lru(bo
);
781 spin_unlock(&glob
->lru_lock
);
786 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
788 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_reserve
, no_wait_gpu
);
789 ttm_bo_unreserve(bo
);
791 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
795 static int ttm_bo_man_get_node(struct ttm_buffer_object
*bo
,
796 struct ttm_mem_type_manager
*man
,
797 struct ttm_placement
*placement
,
798 struct ttm_mem_reg
*mem
,
799 struct drm_mm_node
**node
)
801 struct ttm_bo_global
*glob
= bo
->glob
;
805 lpfn
= placement
->lpfn
;
810 ret
= drm_mm_pre_get(&man
->manager
);
814 spin_lock(&glob
->lru_lock
);
815 *node
= drm_mm_search_free_in_range(&man
->manager
,
816 mem
->num_pages
, mem
->page_alignment
,
817 placement
->fpfn
, lpfn
, 1);
818 if (unlikely(*node
== NULL
)) {
819 spin_unlock(&glob
->lru_lock
);
822 *node
= drm_mm_get_block_atomic_range(*node
, mem
->num_pages
,
826 spin_unlock(&glob
->lru_lock
);
827 } while (*node
== NULL
);
832 * Repeatedly evict memory from the LRU for @mem_type until we create enough
833 * space, or we've evicted everything and there isn't enough space.
835 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
837 struct ttm_placement
*placement
,
838 struct ttm_mem_reg
*mem
,
840 bool no_wait_reserve
,
843 struct ttm_bo_device
*bdev
= bo
->bdev
;
844 struct ttm_bo_global
*glob
= bdev
->glob
;
845 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
846 struct drm_mm_node
*node
;
850 ret
= ttm_bo_man_get_node(bo
, man
, placement
, mem
, &node
);
851 if (unlikely(ret
!= 0))
855 spin_lock(&glob
->lru_lock
);
856 if (list_empty(&man
->lru
)) {
857 spin_unlock(&glob
->lru_lock
);
860 spin_unlock(&glob
->lru_lock
);
861 ret
= ttm_mem_evict_first(bdev
, mem_type
, interruptible
,
862 no_wait_reserve
, no_wait_gpu
);
863 if (unlikely(ret
!= 0))
869 mem
->mem_type
= mem_type
;
873 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
874 uint32_t cur_placement
,
875 uint32_t proposed_placement
)
877 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
878 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
881 * Keep current caching if possible.
884 if ((cur_placement
& caching
) != 0)
885 result
|= (cur_placement
& caching
);
886 else if ((man
->default_caching
& caching
) != 0)
887 result
|= man
->default_caching
;
888 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
889 result
|= TTM_PL_FLAG_CACHED
;
890 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
891 result
|= TTM_PL_FLAG_WC
;
892 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
893 result
|= TTM_PL_FLAG_UNCACHED
;
898 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
901 uint32_t proposed_placement
,
902 uint32_t *masked_placement
)
904 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
906 if ((man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && disallow_fixed
)
909 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
912 if ((proposed_placement
& man
->available_caching
) == 0)
915 cur_flags
|= (proposed_placement
& man
->available_caching
);
917 *masked_placement
= cur_flags
;
922 * Creates space for memory region @mem according to its type.
924 * This function first searches for free space in compatible memory types in
925 * the priority order defined by the driver. If free space isn't found, then
926 * ttm_bo_mem_force_space is attempted in priority order to evict and find
929 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
930 struct ttm_placement
*placement
,
931 struct ttm_mem_reg
*mem
,
932 bool interruptible
, bool no_wait_reserve
,
935 struct ttm_bo_device
*bdev
= bo
->bdev
;
936 struct ttm_mem_type_manager
*man
;
937 uint32_t mem_type
= TTM_PL_SYSTEM
;
938 uint32_t cur_flags
= 0;
939 bool type_found
= false;
940 bool type_ok
= false;
941 bool has_erestartsys
= false;
942 struct drm_mm_node
*node
= NULL
;
946 for (i
= 0; i
< placement
->num_placement
; ++i
) {
947 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
951 man
= &bdev
->man
[mem_type
];
953 type_ok
= ttm_bo_mt_compatible(man
,
954 bo
->type
== ttm_bo_type_user
,
956 placement
->placement
[i
],
962 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
965 * Use the access and other non-mapping-related flag bits from
966 * the memory placement flags to the current flags
968 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
969 ~TTM_PL_MASK_MEMTYPE
);
971 if (mem_type
== TTM_PL_SYSTEM
)
974 if (man
->has_type
&& man
->use_type
) {
976 ret
= ttm_bo_man_get_node(bo
, man
, placement
, mem
,
985 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || node
) {
987 mem
->mem_type
= mem_type
;
988 mem
->placement
= cur_flags
;
995 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
996 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
1000 man
= &bdev
->man
[mem_type
];
1003 if (!ttm_bo_mt_compatible(man
,
1004 bo
->type
== ttm_bo_type_user
,
1006 placement
->busy_placement
[i
],
1010 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
1013 * Use the access and other non-mapping-related flag bits from
1014 * the memory placement flags to the current flags
1016 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
1017 ~TTM_PL_MASK_MEMTYPE
);
1020 if (mem_type
== TTM_PL_SYSTEM
) {
1021 mem
->mem_type
= mem_type
;
1022 mem
->placement
= cur_flags
;
1023 mem
->mm_node
= NULL
;
1027 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
1028 interruptible
, no_wait_reserve
, no_wait_gpu
);
1029 if (ret
== 0 && mem
->mm_node
) {
1030 mem
->placement
= cur_flags
;
1033 if (ret
== -ERESTARTSYS
)
1034 has_erestartsys
= true;
1036 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
1039 EXPORT_SYMBOL(ttm_bo_mem_space
);
1041 int ttm_bo_wait_cpu(struct ttm_buffer_object
*bo
, bool no_wait
)
1043 if ((atomic_read(&bo
->cpu_writers
) > 0) && no_wait
)
1046 return wait_event_interruptible(bo
->event_queue
,
1047 atomic_read(&bo
->cpu_writers
) == 0);
1049 EXPORT_SYMBOL(ttm_bo_wait_cpu
);
1051 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
1052 struct ttm_placement
*placement
,
1053 bool interruptible
, bool no_wait_reserve
,
1056 struct ttm_bo_global
*glob
= bo
->glob
;
1058 struct ttm_mem_reg mem
;
1060 BUG_ON(!atomic_read(&bo
->reserved
));
1062 spin_lock(&bo
->lock
);
1063 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
1064 spin_unlock(&bo
->lock
);
1067 mem
.num_pages
= bo
->num_pages
;
1068 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1069 mem
.page_alignment
= bo
->mem
.page_alignment
;
1070 mem
.bus
.io_reserved
= false;
1072 * Determine where to move the buffer.
1074 ret
= ttm_bo_mem_space(bo
, placement
, &mem
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1077 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false, interruptible
, no_wait_reserve
, no_wait_gpu
);
1079 if (ret
&& mem
.mm_node
) {
1080 spin_lock(&glob
->lru_lock
);
1081 drm_mm_put_block(mem
.mm_node
);
1082 spin_unlock(&glob
->lru_lock
);
1087 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
1088 struct ttm_mem_reg
*mem
)
1091 struct drm_mm_node
*node
= mem
->mm_node
;
1093 if (node
&& placement
->lpfn
!= 0 &&
1094 (node
->start
< placement
->fpfn
||
1095 node
->start
+ node
->size
> placement
->lpfn
))
1098 for (i
= 0; i
< placement
->num_placement
; i
++) {
1099 if ((placement
->placement
[i
] & mem
->placement
&
1100 TTM_PL_MASK_CACHING
) &&
1101 (placement
->placement
[i
] & mem
->placement
&
1108 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1109 struct ttm_placement
*placement
,
1110 bool interruptible
, bool no_wait_reserve
,
1115 BUG_ON(!atomic_read(&bo
->reserved
));
1116 /* Check that range is valid */
1117 if (placement
->lpfn
|| placement
->fpfn
)
1118 if (placement
->fpfn
> placement
->lpfn
||
1119 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1122 * Check whether we need to move buffer.
1124 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1126 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1131 * Use the access and other non-mapping-related flag bits from
1132 * the compatible memory placement flags to the active flags
1134 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1135 ~TTM_PL_MASK_MEMTYPE
);
1138 * We might need to add a TTM.
1140 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1141 ret
= ttm_bo_add_ttm(bo
, true);
1147 EXPORT_SYMBOL(ttm_bo_validate
);
1149 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1150 struct ttm_placement
*placement
)
1154 if (placement
->fpfn
|| placement
->lpfn
) {
1155 if (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)) {
1156 printk(KERN_ERR TTM_PFX
"Page number range to small "
1157 "Need %lu pages, range is [%u, %u]\n",
1158 bo
->mem
.num_pages
, placement
->fpfn
,
1163 for (i
= 0; i
< placement
->num_placement
; i
++) {
1164 if (!capable(CAP_SYS_ADMIN
)) {
1165 if (placement
->placement
[i
] & TTM_PL_FLAG_NO_EVICT
) {
1166 printk(KERN_ERR TTM_PFX
"Need to be root to "
1167 "modify NO_EVICT status.\n");
1172 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1173 if (!capable(CAP_SYS_ADMIN
)) {
1174 if (placement
->busy_placement
[i
] & TTM_PL_FLAG_NO_EVICT
) {
1175 printk(KERN_ERR TTM_PFX
"Need to be root to "
1176 "modify NO_EVICT status.\n");
1184 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1185 struct ttm_buffer_object
*bo
,
1187 enum ttm_bo_type type
,
1188 struct ttm_placement
*placement
,
1189 uint32_t page_alignment
,
1190 unsigned long buffer_start
,
1192 struct file
*persistant_swap_storage
,
1194 void (*destroy
) (struct ttm_buffer_object
*))
1197 unsigned long num_pages
;
1199 size
+= buffer_start
& ~PAGE_MASK
;
1200 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1201 if (num_pages
== 0) {
1202 printk(KERN_ERR TTM_PFX
"Illegal buffer object size.\n");
1205 bo
->destroy
= destroy
;
1207 spin_lock_init(&bo
->lock
);
1208 kref_init(&bo
->kref
);
1209 kref_init(&bo
->list_kref
);
1210 atomic_set(&bo
->cpu_writers
, 0);
1211 atomic_set(&bo
->reserved
, 1);
1212 init_waitqueue_head(&bo
->event_queue
);
1213 INIT_LIST_HEAD(&bo
->lru
);
1214 INIT_LIST_HEAD(&bo
->ddestroy
);
1215 INIT_LIST_HEAD(&bo
->swap
);
1217 bo
->glob
= bdev
->glob
;
1219 bo
->num_pages
= num_pages
;
1220 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1221 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1222 bo
->mem
.num_pages
= bo
->num_pages
;
1223 bo
->mem
.mm_node
= NULL
;
1224 bo
->mem
.page_alignment
= page_alignment
;
1225 bo
->mem
.bus
.io_reserved
= false;
1226 bo
->buffer_start
= buffer_start
& PAGE_MASK
;
1228 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1229 bo
->seq_valid
= false;
1230 bo
->persistant_swap_storage
= persistant_swap_storage
;
1231 bo
->acc_size
= acc_size
;
1232 atomic_inc(&bo
->glob
->bo_count
);
1234 ret
= ttm_bo_check_placement(bo
, placement
);
1235 if (unlikely(ret
!= 0))
1239 * For ttm_bo_type_device buffers, allocate
1240 * address space from the device.
1242 if (bo
->type
== ttm_bo_type_device
) {
1243 ret
= ttm_bo_setup_vm(bo
);
1248 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false, false);
1252 ttm_bo_unreserve(bo
);
1256 ttm_bo_unreserve(bo
);
1261 EXPORT_SYMBOL(ttm_bo_init
);
1263 static inline size_t ttm_bo_size(struct ttm_bo_global
*glob
,
1264 unsigned long num_pages
)
1266 size_t page_array_size
= (num_pages
* sizeof(void *) + PAGE_SIZE
- 1) &
1269 return glob
->ttm_bo_size
+ 2 * page_array_size
;
1272 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1274 enum ttm_bo_type type
,
1275 struct ttm_placement
*placement
,
1276 uint32_t page_alignment
,
1277 unsigned long buffer_start
,
1279 struct file
*persistant_swap_storage
,
1280 struct ttm_buffer_object
**p_bo
)
1282 struct ttm_buffer_object
*bo
;
1283 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1287 ttm_bo_size(bdev
->glob
, (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
);
1288 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1289 if (unlikely(ret
!= 0))
1292 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1294 if (unlikely(bo
== NULL
)) {
1295 ttm_mem_global_free(mem_glob
, acc_size
);
1299 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1300 buffer_start
, interruptible
,
1301 persistant_swap_storage
, acc_size
, NULL
);
1302 if (likely(ret
== 0))
1308 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1309 unsigned mem_type
, bool allow_errors
)
1311 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1312 struct ttm_bo_global
*glob
= bdev
->glob
;
1316 * Can't use standard list traversal since we're unlocking.
1319 spin_lock(&glob
->lru_lock
);
1320 while (!list_empty(&man
->lru
)) {
1321 spin_unlock(&glob
->lru_lock
);
1322 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false, false);
1327 printk(KERN_ERR TTM_PFX
1328 "Cleanup eviction failed\n");
1331 spin_lock(&glob
->lru_lock
);
1333 spin_unlock(&glob
->lru_lock
);
1337 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1339 struct ttm_bo_global
*glob
= bdev
->glob
;
1340 struct ttm_mem_type_manager
*man
;
1343 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1344 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", mem_type
);
1347 man
= &bdev
->man
[mem_type
];
1349 if (!man
->has_type
) {
1350 printk(KERN_ERR TTM_PFX
"Trying to take down uninitialized "
1351 "memory manager type %u\n", mem_type
);
1355 man
->use_type
= false;
1356 man
->has_type
= false;
1360 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1362 spin_lock(&glob
->lru_lock
);
1363 if (drm_mm_clean(&man
->manager
))
1364 drm_mm_takedown(&man
->manager
);
1368 spin_unlock(&glob
->lru_lock
);
1373 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1375 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1377 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1379 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1380 printk(KERN_ERR TTM_PFX
1381 "Illegal memory manager memory type %u.\n",
1386 if (!man
->has_type
) {
1387 printk(KERN_ERR TTM_PFX
1388 "Memory type %u has not been initialized.\n",
1393 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1395 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1397 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1398 unsigned long p_size
)
1401 struct ttm_mem_type_manager
*man
;
1403 if (type
>= TTM_NUM_MEM_TYPES
) {
1404 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", type
);
1408 man
= &bdev
->man
[type
];
1409 if (man
->has_type
) {
1410 printk(KERN_ERR TTM_PFX
1411 "Memory manager already initialized for type %d\n",
1416 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1421 if (type
!= TTM_PL_SYSTEM
) {
1423 printk(KERN_ERR TTM_PFX
1424 "Zero size memory manager type %d\n",
1428 ret
= drm_mm_init(&man
->manager
, 0, p_size
);
1432 man
->has_type
= true;
1433 man
->use_type
= true;
1436 INIT_LIST_HEAD(&man
->lru
);
1440 EXPORT_SYMBOL(ttm_bo_init_mm
);
1442 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1444 struct ttm_bo_global
*glob
=
1445 container_of(kobj
, struct ttm_bo_global
, kobj
);
1447 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1448 __free_page(glob
->dummy_read_page
);
1452 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1454 struct ttm_bo_global
*glob
= ref
->object
;
1456 kobject_del(&glob
->kobj
);
1457 kobject_put(&glob
->kobj
);
1459 EXPORT_SYMBOL(ttm_bo_global_release
);
1461 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1463 struct ttm_bo_global_ref
*bo_ref
=
1464 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1465 struct ttm_bo_global
*glob
= ref
->object
;
1468 mutex_init(&glob
->device_list_mutex
);
1469 spin_lock_init(&glob
->lru_lock
);
1470 glob
->mem_glob
= bo_ref
->mem_glob
;
1471 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1473 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1478 INIT_LIST_HEAD(&glob
->swap_lru
);
1479 INIT_LIST_HEAD(&glob
->device_list
);
1481 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1482 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1483 if (unlikely(ret
!= 0)) {
1484 printk(KERN_ERR TTM_PFX
1485 "Could not register buffer object swapout.\n");
1489 glob
->ttm_bo_extra_size
=
1490 ttm_round_pot(sizeof(struct ttm_tt
)) +
1491 ttm_round_pot(sizeof(struct ttm_backend
));
1493 glob
->ttm_bo_size
= glob
->ttm_bo_extra_size
+
1494 ttm_round_pot(sizeof(struct ttm_buffer_object
));
1496 atomic_set(&glob
->bo_count
, 0);
1498 ret
= kobject_init_and_add(
1499 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1500 if (unlikely(ret
!= 0))
1501 kobject_put(&glob
->kobj
);
1504 __free_page(glob
->dummy_read_page
);
1509 EXPORT_SYMBOL(ttm_bo_global_init
);
1512 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1515 unsigned i
= TTM_NUM_MEM_TYPES
;
1516 struct ttm_mem_type_manager
*man
;
1517 struct ttm_bo_global
*glob
= bdev
->glob
;
1520 man
= &bdev
->man
[i
];
1521 if (man
->has_type
) {
1522 man
->use_type
= false;
1523 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1525 printk(KERN_ERR TTM_PFX
1526 "DRM memory manager type %d "
1527 "is not clean.\n", i
);
1529 man
->has_type
= false;
1533 mutex_lock(&glob
->device_list_mutex
);
1534 list_del(&bdev
->device_list
);
1535 mutex_unlock(&glob
->device_list_mutex
);
1537 if (!cancel_delayed_work(&bdev
->wq
))
1538 flush_scheduled_work();
1540 while (ttm_bo_delayed_delete(bdev
, true))
1543 spin_lock(&glob
->lru_lock
);
1544 if (list_empty(&bdev
->ddestroy
))
1545 TTM_DEBUG("Delayed destroy list was clean\n");
1547 if (list_empty(&bdev
->man
[0].lru
))
1548 TTM_DEBUG("Swap list was clean\n");
1549 spin_unlock(&glob
->lru_lock
);
1551 BUG_ON(!drm_mm_clean(&bdev
->addr_space_mm
));
1552 write_lock(&bdev
->vm_lock
);
1553 drm_mm_takedown(&bdev
->addr_space_mm
);
1554 write_unlock(&bdev
->vm_lock
);
1558 EXPORT_SYMBOL(ttm_bo_device_release
);
1560 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1561 struct ttm_bo_global
*glob
,
1562 struct ttm_bo_driver
*driver
,
1563 uint64_t file_page_offset
,
1568 rwlock_init(&bdev
->vm_lock
);
1569 bdev
->driver
= driver
;
1571 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1574 * Initialize the system memory buffer type.
1575 * Other types need to be driver / IOCTL initialized.
1577 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1578 if (unlikely(ret
!= 0))
1581 bdev
->addr_space_rb
= RB_ROOT
;
1582 ret
= drm_mm_init(&bdev
->addr_space_mm
, file_page_offset
, 0x10000000);
1583 if (unlikely(ret
!= 0))
1584 goto out_no_addr_mm
;
1586 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1587 bdev
->nice_mode
= true;
1588 INIT_LIST_HEAD(&bdev
->ddestroy
);
1589 bdev
->dev_mapping
= NULL
;
1591 bdev
->need_dma32
= need_dma32
;
1593 mutex_lock(&glob
->device_list_mutex
);
1594 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1595 mutex_unlock(&glob
->device_list_mutex
);
1599 ttm_bo_clean_mm(bdev
, 0);
1603 EXPORT_SYMBOL(ttm_bo_device_init
);
1606 * buffer object vm functions.
1609 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1611 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1613 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1614 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1617 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1620 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1626 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1628 struct ttm_bo_device
*bdev
= bo
->bdev
;
1629 loff_t offset
= (loff_t
) bo
->addr_space_offset
;
1630 loff_t holelen
= ((loff_t
) bo
->mem
.num_pages
) << PAGE_SHIFT
;
1632 if (!bdev
->dev_mapping
)
1634 unmap_mapping_range(bdev
->dev_mapping
, offset
, holelen
, 1);
1635 ttm_mem_io_free(bdev
, &bo
->mem
);
1637 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1639 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object
*bo
)
1641 struct ttm_bo_device
*bdev
= bo
->bdev
;
1642 struct rb_node
**cur
= &bdev
->addr_space_rb
.rb_node
;
1643 struct rb_node
*parent
= NULL
;
1644 struct ttm_buffer_object
*cur_bo
;
1645 unsigned long offset
= bo
->vm_node
->start
;
1646 unsigned long cur_offset
;
1650 cur_bo
= rb_entry(parent
, struct ttm_buffer_object
, vm_rb
);
1651 cur_offset
= cur_bo
->vm_node
->start
;
1652 if (offset
< cur_offset
)
1653 cur
= &parent
->rb_left
;
1654 else if (offset
> cur_offset
)
1655 cur
= &parent
->rb_right
;
1660 rb_link_node(&bo
->vm_rb
, parent
, cur
);
1661 rb_insert_color(&bo
->vm_rb
, &bdev
->addr_space_rb
);
1667 * @bo: the buffer to allocate address space for
1669 * Allocate address space in the drm device so that applications
1670 * can mmap the buffer and access the contents. This only
1671 * applies to ttm_bo_type_device objects as others are not
1672 * placed in the drm device address space.
1675 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1677 struct ttm_bo_device
*bdev
= bo
->bdev
;
1681 ret
= drm_mm_pre_get(&bdev
->addr_space_mm
);
1682 if (unlikely(ret
!= 0))
1685 write_lock(&bdev
->vm_lock
);
1686 bo
->vm_node
= drm_mm_search_free(&bdev
->addr_space_mm
,
1687 bo
->mem
.num_pages
, 0, 0);
1689 if (unlikely(bo
->vm_node
== NULL
)) {
1694 bo
->vm_node
= drm_mm_get_block_atomic(bo
->vm_node
,
1695 bo
->mem
.num_pages
, 0);
1697 if (unlikely(bo
->vm_node
== NULL
)) {
1698 write_unlock(&bdev
->vm_lock
);
1702 ttm_bo_vm_insert_rb(bo
);
1703 write_unlock(&bdev
->vm_lock
);
1704 bo
->addr_space_offset
= ((uint64_t) bo
->vm_node
->start
) << PAGE_SHIFT
;
1708 write_unlock(&bdev
->vm_lock
);
1712 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1713 bool lazy
, bool interruptible
, bool no_wait
)
1715 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1720 if (likely(bo
->sync_obj
== NULL
))
1723 while (bo
->sync_obj
) {
1725 if (driver
->sync_obj_signaled(bo
->sync_obj
, bo
->sync_obj_arg
)) {
1726 void *tmp_obj
= bo
->sync_obj
;
1727 bo
->sync_obj
= NULL
;
1728 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1729 spin_unlock(&bo
->lock
);
1730 driver
->sync_obj_unref(&tmp_obj
);
1731 spin_lock(&bo
->lock
);
1738 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1739 sync_obj_arg
= bo
->sync_obj_arg
;
1740 spin_unlock(&bo
->lock
);
1741 ret
= driver
->sync_obj_wait(sync_obj
, sync_obj_arg
,
1742 lazy
, interruptible
);
1743 if (unlikely(ret
!= 0)) {
1744 driver
->sync_obj_unref(&sync_obj
);
1745 spin_lock(&bo
->lock
);
1748 spin_lock(&bo
->lock
);
1749 if (likely(bo
->sync_obj
== sync_obj
&&
1750 bo
->sync_obj_arg
== sync_obj_arg
)) {
1751 void *tmp_obj
= bo
->sync_obj
;
1752 bo
->sync_obj
= NULL
;
1753 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1755 spin_unlock(&bo
->lock
);
1756 driver
->sync_obj_unref(&sync_obj
);
1757 driver
->sync_obj_unref(&tmp_obj
);
1758 spin_lock(&bo
->lock
);
1760 spin_unlock(&bo
->lock
);
1761 driver
->sync_obj_unref(&sync_obj
);
1762 spin_lock(&bo
->lock
);
1767 EXPORT_SYMBOL(ttm_bo_wait
);
1769 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1774 * Using ttm_bo_reserve makes sure the lru lists are updated.
1777 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1778 if (unlikely(ret
!= 0))
1780 spin_lock(&bo
->lock
);
1781 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1782 spin_unlock(&bo
->lock
);
1783 if (likely(ret
== 0))
1784 atomic_inc(&bo
->cpu_writers
);
1785 ttm_bo_unreserve(bo
);
1788 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1790 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1792 if (atomic_dec_and_test(&bo
->cpu_writers
))
1793 wake_up_all(&bo
->event_queue
);
1795 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1798 * A buffer object shrink method that tries to swap out the first
1799 * buffer object on the bo_global::swap_lru list.
1802 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1804 struct ttm_bo_global
*glob
=
1805 container_of(shrink
, struct ttm_bo_global
, shrink
);
1806 struct ttm_buffer_object
*bo
;
1809 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1811 spin_lock(&glob
->lru_lock
);
1812 while (ret
== -EBUSY
) {
1813 if (unlikely(list_empty(&glob
->swap_lru
))) {
1814 spin_unlock(&glob
->lru_lock
);
1818 bo
= list_first_entry(&glob
->swap_lru
,
1819 struct ttm_buffer_object
, swap
);
1820 kref_get(&bo
->list_kref
);
1823 * Reserve buffer. Since we unlock while sleeping, we need
1824 * to re-check that nobody removed us from the swap-list while
1828 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
1829 if (unlikely(ret
== -EBUSY
)) {
1830 spin_unlock(&glob
->lru_lock
);
1831 ttm_bo_wait_unreserved(bo
, false);
1832 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1833 spin_lock(&glob
->lru_lock
);
1838 put_count
= ttm_bo_del_from_lru(bo
);
1839 spin_unlock(&glob
->lru_lock
);
1842 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
1845 * Wait for GPU, then move to system cached.
1848 spin_lock(&bo
->lock
);
1849 ret
= ttm_bo_wait(bo
, false, false, false);
1850 spin_unlock(&bo
->lock
);
1852 if (unlikely(ret
!= 0))
1855 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1856 struct ttm_mem_reg evict_mem
;
1858 evict_mem
= bo
->mem
;
1859 evict_mem
.mm_node
= NULL
;
1860 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1861 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1863 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1864 false, false, false);
1865 if (unlikely(ret
!= 0))
1869 ttm_bo_unmap_virtual(bo
);
1872 * Swap out. Buffer will be swapped in again as soon as
1873 * anyone tries to access a ttm page.
1876 if (bo
->bdev
->driver
->swap_notify
)
1877 bo
->bdev
->driver
->swap_notify(bo
);
1879 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistant_swap_storage
);
1884 * Unreserve without putting on LRU to avoid swapping out an
1885 * already swapped buffer.
1888 atomic_set(&bo
->reserved
, 0);
1889 wake_up_all(&bo
->event_queue
);
1890 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1894 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1896 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1899 EXPORT_SYMBOL(ttm_bo_swapout_all
);