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 * If bo idle, remove from delayed- and lru lists, and unref.
446 * If not idle, and already on delayed list, do nothing.
447 * If not idle, and not on delayed list, put on delayed list,
448 * up the list_kref and schedule a delayed list check.
451 static int ttm_bo_cleanup_refs(struct ttm_buffer_object
*bo
, bool remove_all
)
453 struct ttm_bo_device
*bdev
= bo
->bdev
;
454 struct ttm_bo_global
*glob
= bo
->glob
;
455 struct ttm_bo_driver
*driver
= bdev
->driver
;
458 spin_lock(&bo
->lock
);
459 (void) ttm_bo_wait(bo
, false, false, !remove_all
);
464 spin_unlock(&bo
->lock
);
466 spin_lock(&glob
->lru_lock
);
467 put_count
= ttm_bo_del_from_lru(bo
);
469 ret
= ttm_bo_reserve_locked(bo
, false, false, false, 0);
472 ttm_tt_unbind(bo
->ttm
);
474 if (!list_empty(&bo
->ddestroy
)) {
475 list_del_init(&bo
->ddestroy
);
478 if (bo
->mem
.mm_node
) {
479 drm_mm_put_block(bo
->mem
.mm_node
);
480 bo
->mem
.mm_node
= NULL
;
482 spin_unlock(&glob
->lru_lock
);
484 atomic_set(&bo
->reserved
, 0);
487 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
492 spin_lock(&glob
->lru_lock
);
493 if (list_empty(&bo
->ddestroy
)) {
494 void *sync_obj
= bo
->sync_obj
;
495 void *sync_obj_arg
= bo
->sync_obj_arg
;
497 kref_get(&bo
->list_kref
);
498 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
499 spin_unlock(&glob
->lru_lock
);
500 spin_unlock(&bo
->lock
);
503 driver
->sync_obj_flush(sync_obj
, sync_obj_arg
);
504 schedule_delayed_work(&bdev
->wq
,
505 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
509 spin_unlock(&glob
->lru_lock
);
510 spin_unlock(&bo
->lock
);
518 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
519 * encountered buffers.
522 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
524 struct ttm_bo_global
*glob
= bdev
->glob
;
525 struct ttm_buffer_object
*entry
= NULL
;
528 spin_lock(&glob
->lru_lock
);
529 if (list_empty(&bdev
->ddestroy
))
532 entry
= list_first_entry(&bdev
->ddestroy
,
533 struct ttm_buffer_object
, ddestroy
);
534 kref_get(&entry
->list_kref
);
537 struct ttm_buffer_object
*nentry
= NULL
;
539 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
540 nentry
= list_first_entry(&entry
->ddestroy
,
541 struct ttm_buffer_object
, ddestroy
);
542 kref_get(&nentry
->list_kref
);
545 spin_unlock(&glob
->lru_lock
);
546 ret
= ttm_bo_cleanup_refs(entry
, remove_all
);
547 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
553 spin_lock(&glob
->lru_lock
);
554 if (list_empty(&entry
->ddestroy
))
559 spin_unlock(&glob
->lru_lock
);
562 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
566 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
568 struct ttm_bo_device
*bdev
=
569 container_of(work
, struct ttm_bo_device
, wq
.work
);
571 if (ttm_bo_delayed_delete(bdev
, false)) {
572 schedule_delayed_work(&bdev
->wq
,
573 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
577 static void ttm_bo_release(struct kref
*kref
)
579 struct ttm_buffer_object
*bo
=
580 container_of(kref
, struct ttm_buffer_object
, kref
);
581 struct ttm_bo_device
*bdev
= bo
->bdev
;
583 if (likely(bo
->vm_node
!= NULL
)) {
584 rb_erase(&bo
->vm_rb
, &bdev
->addr_space_rb
);
585 drm_mm_put_block(bo
->vm_node
);
588 write_unlock(&bdev
->vm_lock
);
589 ttm_bo_cleanup_refs(bo
, false);
590 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
591 write_lock(&bdev
->vm_lock
);
594 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
596 struct ttm_buffer_object
*bo
= *p_bo
;
597 struct ttm_bo_device
*bdev
= bo
->bdev
;
600 write_lock(&bdev
->vm_lock
);
601 kref_put(&bo
->kref
, ttm_bo_release
);
602 write_unlock(&bdev
->vm_lock
);
604 EXPORT_SYMBOL(ttm_bo_unref
);
606 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device
*bdev
)
608 return cancel_delayed_work_sync(&bdev
->wq
);
610 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue
);
612 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device
*bdev
, int resched
)
615 schedule_delayed_work(&bdev
->wq
,
616 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
618 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue
);
620 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
621 bool no_wait_reserve
, bool no_wait_gpu
)
623 struct ttm_bo_device
*bdev
= bo
->bdev
;
624 struct ttm_bo_global
*glob
= bo
->glob
;
625 struct ttm_mem_reg evict_mem
;
626 struct ttm_placement placement
;
629 spin_lock(&bo
->lock
);
630 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
631 spin_unlock(&bo
->lock
);
633 if (unlikely(ret
!= 0)) {
634 if (ret
!= -ERESTARTSYS
) {
635 printk(KERN_ERR TTM_PFX
636 "Failed to expire sync object before "
637 "buffer eviction.\n");
642 BUG_ON(!atomic_read(&bo
->reserved
));
645 evict_mem
.mm_node
= NULL
;
646 evict_mem
.bus
.io_reserved
= false;
650 placement
.num_placement
= 0;
651 placement
.num_busy_placement
= 0;
652 bdev
->driver
->evict_flags(bo
, &placement
);
653 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
654 no_wait_reserve
, no_wait_gpu
);
656 if (ret
!= -ERESTARTSYS
) {
657 printk(KERN_ERR TTM_PFX
658 "Failed to find memory space for "
659 "buffer 0x%p eviction.\n", bo
);
660 ttm_bo_mem_space_debug(bo
, &placement
);
665 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
666 no_wait_reserve
, no_wait_gpu
);
668 if (ret
!= -ERESTARTSYS
)
669 printk(KERN_ERR TTM_PFX
"Buffer eviction failed\n");
670 spin_lock(&glob
->lru_lock
);
671 if (evict_mem
.mm_node
) {
672 drm_mm_put_block(evict_mem
.mm_node
);
673 evict_mem
.mm_node
= NULL
;
675 spin_unlock(&glob
->lru_lock
);
683 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
685 bool interruptible
, bool no_wait_reserve
,
688 struct ttm_bo_global
*glob
= bdev
->glob
;
689 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
690 struct ttm_buffer_object
*bo
;
691 int ret
, put_count
= 0;
694 spin_lock(&glob
->lru_lock
);
695 if (list_empty(&man
->lru
)) {
696 spin_unlock(&glob
->lru_lock
);
700 bo
= list_first_entry(&man
->lru
, struct ttm_buffer_object
, lru
);
701 kref_get(&bo
->list_kref
);
703 ret
= ttm_bo_reserve_locked(bo
, false, no_wait_reserve
, false, 0);
705 if (unlikely(ret
== -EBUSY
)) {
706 spin_unlock(&glob
->lru_lock
);
707 if (likely(!no_wait_gpu
))
708 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
710 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
713 * We *need* to retry after releasing the lru lock.
716 if (unlikely(ret
!= 0))
721 put_count
= ttm_bo_del_from_lru(bo
);
722 spin_unlock(&glob
->lru_lock
);
727 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
729 ret
= ttm_bo_evict(bo
, interruptible
, no_wait_reserve
, no_wait_gpu
);
730 ttm_bo_unreserve(bo
);
732 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
736 static int ttm_bo_man_get_node(struct ttm_buffer_object
*bo
,
737 struct ttm_mem_type_manager
*man
,
738 struct ttm_placement
*placement
,
739 struct ttm_mem_reg
*mem
,
740 struct drm_mm_node
**node
)
742 struct ttm_bo_global
*glob
= bo
->glob
;
746 lpfn
= placement
->lpfn
;
751 ret
= drm_mm_pre_get(&man
->manager
);
755 spin_lock(&glob
->lru_lock
);
756 *node
= drm_mm_search_free_in_range(&man
->manager
,
757 mem
->num_pages
, mem
->page_alignment
,
758 placement
->fpfn
, lpfn
, 1);
759 if (unlikely(*node
== NULL
)) {
760 spin_unlock(&glob
->lru_lock
);
763 *node
= drm_mm_get_block_atomic_range(*node
, mem
->num_pages
,
767 spin_unlock(&glob
->lru_lock
);
768 } while (*node
== NULL
);
773 * Repeatedly evict memory from the LRU for @mem_type until we create enough
774 * space, or we've evicted everything and there isn't enough space.
776 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
778 struct ttm_placement
*placement
,
779 struct ttm_mem_reg
*mem
,
781 bool no_wait_reserve
,
784 struct ttm_bo_device
*bdev
= bo
->bdev
;
785 struct ttm_bo_global
*glob
= bdev
->glob
;
786 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
787 struct drm_mm_node
*node
;
791 ret
= ttm_bo_man_get_node(bo
, man
, placement
, mem
, &node
);
792 if (unlikely(ret
!= 0))
796 spin_lock(&glob
->lru_lock
);
797 if (list_empty(&man
->lru
)) {
798 spin_unlock(&glob
->lru_lock
);
801 spin_unlock(&glob
->lru_lock
);
802 ret
= ttm_mem_evict_first(bdev
, mem_type
, interruptible
,
803 no_wait_reserve
, no_wait_gpu
);
804 if (unlikely(ret
!= 0))
810 mem
->mem_type
= mem_type
;
814 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
815 uint32_t cur_placement
,
816 uint32_t proposed_placement
)
818 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
819 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
822 * Keep current caching if possible.
825 if ((cur_placement
& caching
) != 0)
826 result
|= (cur_placement
& caching
);
827 else if ((man
->default_caching
& caching
) != 0)
828 result
|= man
->default_caching
;
829 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
830 result
|= TTM_PL_FLAG_CACHED
;
831 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
832 result
|= TTM_PL_FLAG_WC
;
833 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
834 result
|= TTM_PL_FLAG_UNCACHED
;
839 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
842 uint32_t proposed_placement
,
843 uint32_t *masked_placement
)
845 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
847 if ((man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && disallow_fixed
)
850 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
853 if ((proposed_placement
& man
->available_caching
) == 0)
856 cur_flags
|= (proposed_placement
& man
->available_caching
);
858 *masked_placement
= cur_flags
;
863 * Creates space for memory region @mem according to its type.
865 * This function first searches for free space in compatible memory types in
866 * the priority order defined by the driver. If free space isn't found, then
867 * ttm_bo_mem_force_space is attempted in priority order to evict and find
870 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
871 struct ttm_placement
*placement
,
872 struct ttm_mem_reg
*mem
,
873 bool interruptible
, bool no_wait_reserve
,
876 struct ttm_bo_device
*bdev
= bo
->bdev
;
877 struct ttm_mem_type_manager
*man
;
878 uint32_t mem_type
= TTM_PL_SYSTEM
;
879 uint32_t cur_flags
= 0;
880 bool type_found
= false;
881 bool type_ok
= false;
882 bool has_erestartsys
= false;
883 struct drm_mm_node
*node
= NULL
;
887 for (i
= 0; i
< placement
->num_placement
; ++i
) {
888 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
892 man
= &bdev
->man
[mem_type
];
894 type_ok
= ttm_bo_mt_compatible(man
,
895 bo
->type
== ttm_bo_type_user
,
897 placement
->placement
[i
],
903 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
906 * Use the access and other non-mapping-related flag bits from
907 * the memory placement flags to the current flags
909 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
910 ~TTM_PL_MASK_MEMTYPE
);
912 if (mem_type
== TTM_PL_SYSTEM
)
915 if (man
->has_type
&& man
->use_type
) {
917 ret
= ttm_bo_man_get_node(bo
, man
, placement
, mem
,
926 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || node
) {
928 mem
->mem_type
= mem_type
;
929 mem
->placement
= cur_flags
;
936 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
937 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
941 man
= &bdev
->man
[mem_type
];
944 if (!ttm_bo_mt_compatible(man
,
945 bo
->type
== ttm_bo_type_user
,
947 placement
->busy_placement
[i
],
951 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
954 * Use the access and other non-mapping-related flag bits from
955 * the memory placement flags to the current flags
957 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
958 ~TTM_PL_MASK_MEMTYPE
);
961 if (mem_type
== TTM_PL_SYSTEM
) {
962 mem
->mem_type
= mem_type
;
963 mem
->placement
= cur_flags
;
968 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
969 interruptible
, no_wait_reserve
, no_wait_gpu
);
970 if (ret
== 0 && mem
->mm_node
) {
971 mem
->placement
= cur_flags
;
974 if (ret
== -ERESTARTSYS
)
975 has_erestartsys
= true;
977 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
980 EXPORT_SYMBOL(ttm_bo_mem_space
);
982 int ttm_bo_wait_cpu(struct ttm_buffer_object
*bo
, bool no_wait
)
984 if ((atomic_read(&bo
->cpu_writers
) > 0) && no_wait
)
987 return wait_event_interruptible(bo
->event_queue
,
988 atomic_read(&bo
->cpu_writers
) == 0);
990 EXPORT_SYMBOL(ttm_bo_wait_cpu
);
992 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
993 struct ttm_placement
*placement
,
994 bool interruptible
, bool no_wait_reserve
,
997 struct ttm_bo_global
*glob
= bo
->glob
;
999 struct ttm_mem_reg mem
;
1001 BUG_ON(!atomic_read(&bo
->reserved
));
1004 * FIXME: It's possible to pipeline buffer moves.
1005 * Have the driver move function wait for idle when necessary,
1006 * instead of doing it here.
1008 spin_lock(&bo
->lock
);
1009 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait_gpu
);
1010 spin_unlock(&bo
->lock
);
1013 mem
.num_pages
= bo
->num_pages
;
1014 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1015 mem
.page_alignment
= bo
->mem
.page_alignment
;
1016 mem
.bus
.io_reserved
= false;
1018 * Determine where to move the buffer.
1020 ret
= ttm_bo_mem_space(bo
, placement
, &mem
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1023 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false, interruptible
, no_wait_reserve
, no_wait_gpu
);
1025 if (ret
&& mem
.mm_node
) {
1026 spin_lock(&glob
->lru_lock
);
1027 drm_mm_put_block(mem
.mm_node
);
1028 spin_unlock(&glob
->lru_lock
);
1033 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
1034 struct ttm_mem_reg
*mem
)
1037 struct drm_mm_node
*node
= mem
->mm_node
;
1039 if (node
&& placement
->lpfn
!= 0 &&
1040 (node
->start
< placement
->fpfn
||
1041 node
->start
+ node
->size
> placement
->lpfn
))
1044 for (i
= 0; i
< placement
->num_placement
; i
++) {
1045 if ((placement
->placement
[i
] & mem
->placement
&
1046 TTM_PL_MASK_CACHING
) &&
1047 (placement
->placement
[i
] & mem
->placement
&
1054 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1055 struct ttm_placement
*placement
,
1056 bool interruptible
, bool no_wait_reserve
,
1061 BUG_ON(!atomic_read(&bo
->reserved
));
1062 /* Check that range is valid */
1063 if (placement
->lpfn
|| placement
->fpfn
)
1064 if (placement
->fpfn
> placement
->lpfn
||
1065 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1068 * Check whether we need to move buffer.
1070 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1072 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
, no_wait_reserve
, no_wait_gpu
);
1077 * Use the access and other non-mapping-related flag bits from
1078 * the compatible memory placement flags to the active flags
1080 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1081 ~TTM_PL_MASK_MEMTYPE
);
1084 * We might need to add a TTM.
1086 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1087 ret
= ttm_bo_add_ttm(bo
, true);
1093 EXPORT_SYMBOL(ttm_bo_validate
);
1095 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1096 struct ttm_placement
*placement
)
1100 if (placement
->fpfn
|| placement
->lpfn
) {
1101 if (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)) {
1102 printk(KERN_ERR TTM_PFX
"Page number range to small "
1103 "Need %lu pages, range is [%u, %u]\n",
1104 bo
->mem
.num_pages
, placement
->fpfn
,
1109 for (i
= 0; i
< placement
->num_placement
; i
++) {
1110 if (!capable(CAP_SYS_ADMIN
)) {
1111 if (placement
->placement
[i
] & TTM_PL_FLAG_NO_EVICT
) {
1112 printk(KERN_ERR TTM_PFX
"Need to be root to "
1113 "modify NO_EVICT status.\n");
1118 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1119 if (!capable(CAP_SYS_ADMIN
)) {
1120 if (placement
->busy_placement
[i
] & TTM_PL_FLAG_NO_EVICT
) {
1121 printk(KERN_ERR TTM_PFX
"Need to be root to "
1122 "modify NO_EVICT status.\n");
1130 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1131 struct ttm_buffer_object
*bo
,
1133 enum ttm_bo_type type
,
1134 struct ttm_placement
*placement
,
1135 uint32_t page_alignment
,
1136 unsigned long buffer_start
,
1138 struct file
*persistant_swap_storage
,
1140 void (*destroy
) (struct ttm_buffer_object
*))
1143 unsigned long num_pages
;
1145 size
+= buffer_start
& ~PAGE_MASK
;
1146 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1147 if (num_pages
== 0) {
1148 printk(KERN_ERR TTM_PFX
"Illegal buffer object size.\n");
1151 bo
->destroy
= destroy
;
1153 spin_lock_init(&bo
->lock
);
1154 kref_init(&bo
->kref
);
1155 kref_init(&bo
->list_kref
);
1156 atomic_set(&bo
->cpu_writers
, 0);
1157 atomic_set(&bo
->reserved
, 1);
1158 init_waitqueue_head(&bo
->event_queue
);
1159 INIT_LIST_HEAD(&bo
->lru
);
1160 INIT_LIST_HEAD(&bo
->ddestroy
);
1161 INIT_LIST_HEAD(&bo
->swap
);
1163 bo
->glob
= bdev
->glob
;
1165 bo
->num_pages
= num_pages
;
1166 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1167 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1168 bo
->mem
.num_pages
= bo
->num_pages
;
1169 bo
->mem
.mm_node
= NULL
;
1170 bo
->mem
.page_alignment
= page_alignment
;
1171 bo
->mem
.bus
.io_reserved
= false;
1172 bo
->buffer_start
= buffer_start
& PAGE_MASK
;
1174 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1175 bo
->seq_valid
= false;
1176 bo
->persistant_swap_storage
= persistant_swap_storage
;
1177 bo
->acc_size
= acc_size
;
1178 atomic_inc(&bo
->glob
->bo_count
);
1180 ret
= ttm_bo_check_placement(bo
, placement
);
1181 if (unlikely(ret
!= 0))
1185 * For ttm_bo_type_device buffers, allocate
1186 * address space from the device.
1188 if (bo
->type
== ttm_bo_type_device
) {
1189 ret
= ttm_bo_setup_vm(bo
);
1194 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false, false);
1198 ttm_bo_unreserve(bo
);
1202 ttm_bo_unreserve(bo
);
1207 EXPORT_SYMBOL(ttm_bo_init
);
1209 static inline size_t ttm_bo_size(struct ttm_bo_global
*glob
,
1210 unsigned long num_pages
)
1212 size_t page_array_size
= (num_pages
* sizeof(void *) + PAGE_SIZE
- 1) &
1215 return glob
->ttm_bo_size
+ 2 * page_array_size
;
1218 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1220 enum ttm_bo_type type
,
1221 struct ttm_placement
*placement
,
1222 uint32_t page_alignment
,
1223 unsigned long buffer_start
,
1225 struct file
*persistant_swap_storage
,
1226 struct ttm_buffer_object
**p_bo
)
1228 struct ttm_buffer_object
*bo
;
1229 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1233 ttm_bo_size(bdev
->glob
, (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
);
1234 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1235 if (unlikely(ret
!= 0))
1238 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1240 if (unlikely(bo
== NULL
)) {
1241 ttm_mem_global_free(mem_glob
, acc_size
);
1245 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1246 buffer_start
, interruptible
,
1247 persistant_swap_storage
, acc_size
, NULL
);
1248 if (likely(ret
== 0))
1254 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1255 unsigned mem_type
, bool allow_errors
)
1257 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1258 struct ttm_bo_global
*glob
= bdev
->glob
;
1262 * Can't use standard list traversal since we're unlocking.
1265 spin_lock(&glob
->lru_lock
);
1266 while (!list_empty(&man
->lru
)) {
1267 spin_unlock(&glob
->lru_lock
);
1268 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false, false);
1273 printk(KERN_ERR TTM_PFX
1274 "Cleanup eviction failed\n");
1277 spin_lock(&glob
->lru_lock
);
1279 spin_unlock(&glob
->lru_lock
);
1283 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1285 struct ttm_bo_global
*glob
= bdev
->glob
;
1286 struct ttm_mem_type_manager
*man
;
1289 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1290 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", mem_type
);
1293 man
= &bdev
->man
[mem_type
];
1295 if (!man
->has_type
) {
1296 printk(KERN_ERR TTM_PFX
"Trying to take down uninitialized "
1297 "memory manager type %u\n", mem_type
);
1301 man
->use_type
= false;
1302 man
->has_type
= false;
1306 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1308 spin_lock(&glob
->lru_lock
);
1309 if (drm_mm_clean(&man
->manager
))
1310 drm_mm_takedown(&man
->manager
);
1314 spin_unlock(&glob
->lru_lock
);
1319 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1321 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1323 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1325 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1326 printk(KERN_ERR TTM_PFX
1327 "Illegal memory manager memory type %u.\n",
1332 if (!man
->has_type
) {
1333 printk(KERN_ERR TTM_PFX
1334 "Memory type %u has not been initialized.\n",
1339 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1341 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1343 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1344 unsigned long p_size
)
1347 struct ttm_mem_type_manager
*man
;
1349 if (type
>= TTM_NUM_MEM_TYPES
) {
1350 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", type
);
1354 man
= &bdev
->man
[type
];
1355 if (man
->has_type
) {
1356 printk(KERN_ERR TTM_PFX
1357 "Memory manager already initialized for type %d\n",
1362 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1367 if (type
!= TTM_PL_SYSTEM
) {
1369 printk(KERN_ERR TTM_PFX
1370 "Zero size memory manager type %d\n",
1374 ret
= drm_mm_init(&man
->manager
, 0, p_size
);
1378 man
->has_type
= true;
1379 man
->use_type
= true;
1382 INIT_LIST_HEAD(&man
->lru
);
1386 EXPORT_SYMBOL(ttm_bo_init_mm
);
1388 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1390 struct ttm_bo_global
*glob
=
1391 container_of(kobj
, struct ttm_bo_global
, kobj
);
1393 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1394 __free_page(glob
->dummy_read_page
);
1398 void ttm_bo_global_release(struct drm_global_reference
*ref
)
1400 struct ttm_bo_global
*glob
= ref
->object
;
1402 kobject_del(&glob
->kobj
);
1403 kobject_put(&glob
->kobj
);
1405 EXPORT_SYMBOL(ttm_bo_global_release
);
1407 int ttm_bo_global_init(struct drm_global_reference
*ref
)
1409 struct ttm_bo_global_ref
*bo_ref
=
1410 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1411 struct ttm_bo_global
*glob
= ref
->object
;
1414 mutex_init(&glob
->device_list_mutex
);
1415 spin_lock_init(&glob
->lru_lock
);
1416 glob
->mem_glob
= bo_ref
->mem_glob
;
1417 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1419 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1424 INIT_LIST_HEAD(&glob
->swap_lru
);
1425 INIT_LIST_HEAD(&glob
->device_list
);
1427 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1428 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1429 if (unlikely(ret
!= 0)) {
1430 printk(KERN_ERR TTM_PFX
1431 "Could not register buffer object swapout.\n");
1435 glob
->ttm_bo_extra_size
=
1436 ttm_round_pot(sizeof(struct ttm_tt
)) +
1437 ttm_round_pot(sizeof(struct ttm_backend
));
1439 glob
->ttm_bo_size
= glob
->ttm_bo_extra_size
+
1440 ttm_round_pot(sizeof(struct ttm_buffer_object
));
1442 atomic_set(&glob
->bo_count
, 0);
1444 ret
= kobject_init_and_add(
1445 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1446 if (unlikely(ret
!= 0))
1447 kobject_put(&glob
->kobj
);
1450 __free_page(glob
->dummy_read_page
);
1455 EXPORT_SYMBOL(ttm_bo_global_init
);
1458 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1461 unsigned i
= TTM_NUM_MEM_TYPES
;
1462 struct ttm_mem_type_manager
*man
;
1463 struct ttm_bo_global
*glob
= bdev
->glob
;
1466 man
= &bdev
->man
[i
];
1467 if (man
->has_type
) {
1468 man
->use_type
= false;
1469 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1471 printk(KERN_ERR TTM_PFX
1472 "DRM memory manager type %d "
1473 "is not clean.\n", i
);
1475 man
->has_type
= false;
1479 mutex_lock(&glob
->device_list_mutex
);
1480 list_del(&bdev
->device_list
);
1481 mutex_unlock(&glob
->device_list_mutex
);
1483 if (!cancel_delayed_work(&bdev
->wq
))
1484 flush_scheduled_work();
1486 while (ttm_bo_delayed_delete(bdev
, true))
1489 spin_lock(&glob
->lru_lock
);
1490 if (list_empty(&bdev
->ddestroy
))
1491 TTM_DEBUG("Delayed destroy list was clean\n");
1493 if (list_empty(&bdev
->man
[0].lru
))
1494 TTM_DEBUG("Swap list was clean\n");
1495 spin_unlock(&glob
->lru_lock
);
1497 BUG_ON(!drm_mm_clean(&bdev
->addr_space_mm
));
1498 write_lock(&bdev
->vm_lock
);
1499 drm_mm_takedown(&bdev
->addr_space_mm
);
1500 write_unlock(&bdev
->vm_lock
);
1504 EXPORT_SYMBOL(ttm_bo_device_release
);
1506 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1507 struct ttm_bo_global
*glob
,
1508 struct ttm_bo_driver
*driver
,
1509 uint64_t file_page_offset
,
1514 rwlock_init(&bdev
->vm_lock
);
1515 bdev
->driver
= driver
;
1517 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1520 * Initialize the system memory buffer type.
1521 * Other types need to be driver / IOCTL initialized.
1523 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1524 if (unlikely(ret
!= 0))
1527 bdev
->addr_space_rb
= RB_ROOT
;
1528 ret
= drm_mm_init(&bdev
->addr_space_mm
, file_page_offset
, 0x10000000);
1529 if (unlikely(ret
!= 0))
1530 goto out_no_addr_mm
;
1532 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1533 bdev
->nice_mode
= true;
1534 INIT_LIST_HEAD(&bdev
->ddestroy
);
1535 bdev
->dev_mapping
= NULL
;
1537 bdev
->need_dma32
= need_dma32
;
1539 mutex_lock(&glob
->device_list_mutex
);
1540 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1541 mutex_unlock(&glob
->device_list_mutex
);
1545 ttm_bo_clean_mm(bdev
, 0);
1549 EXPORT_SYMBOL(ttm_bo_device_init
);
1552 * buffer object vm functions.
1555 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1557 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1559 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1560 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1563 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1566 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1572 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1574 struct ttm_bo_device
*bdev
= bo
->bdev
;
1575 loff_t offset
= (loff_t
) bo
->addr_space_offset
;
1576 loff_t holelen
= ((loff_t
) bo
->mem
.num_pages
) << PAGE_SHIFT
;
1578 if (!bdev
->dev_mapping
)
1580 unmap_mapping_range(bdev
->dev_mapping
, offset
, holelen
, 1);
1581 ttm_mem_io_free(bdev
, &bo
->mem
);
1583 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1585 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object
*bo
)
1587 struct ttm_bo_device
*bdev
= bo
->bdev
;
1588 struct rb_node
**cur
= &bdev
->addr_space_rb
.rb_node
;
1589 struct rb_node
*parent
= NULL
;
1590 struct ttm_buffer_object
*cur_bo
;
1591 unsigned long offset
= bo
->vm_node
->start
;
1592 unsigned long cur_offset
;
1596 cur_bo
= rb_entry(parent
, struct ttm_buffer_object
, vm_rb
);
1597 cur_offset
= cur_bo
->vm_node
->start
;
1598 if (offset
< cur_offset
)
1599 cur
= &parent
->rb_left
;
1600 else if (offset
> cur_offset
)
1601 cur
= &parent
->rb_right
;
1606 rb_link_node(&bo
->vm_rb
, parent
, cur
);
1607 rb_insert_color(&bo
->vm_rb
, &bdev
->addr_space_rb
);
1613 * @bo: the buffer to allocate address space for
1615 * Allocate address space in the drm device so that applications
1616 * can mmap the buffer and access the contents. This only
1617 * applies to ttm_bo_type_device objects as others are not
1618 * placed in the drm device address space.
1621 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1623 struct ttm_bo_device
*bdev
= bo
->bdev
;
1627 ret
= drm_mm_pre_get(&bdev
->addr_space_mm
);
1628 if (unlikely(ret
!= 0))
1631 write_lock(&bdev
->vm_lock
);
1632 bo
->vm_node
= drm_mm_search_free(&bdev
->addr_space_mm
,
1633 bo
->mem
.num_pages
, 0, 0);
1635 if (unlikely(bo
->vm_node
== NULL
)) {
1640 bo
->vm_node
= drm_mm_get_block_atomic(bo
->vm_node
,
1641 bo
->mem
.num_pages
, 0);
1643 if (unlikely(bo
->vm_node
== NULL
)) {
1644 write_unlock(&bdev
->vm_lock
);
1648 ttm_bo_vm_insert_rb(bo
);
1649 write_unlock(&bdev
->vm_lock
);
1650 bo
->addr_space_offset
= ((uint64_t) bo
->vm_node
->start
) << PAGE_SHIFT
;
1654 write_unlock(&bdev
->vm_lock
);
1658 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1659 bool lazy
, bool interruptible
, bool no_wait
)
1661 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1666 if (likely(bo
->sync_obj
== NULL
))
1669 while (bo
->sync_obj
) {
1671 if (driver
->sync_obj_signaled(bo
->sync_obj
, bo
->sync_obj_arg
)) {
1672 void *tmp_obj
= bo
->sync_obj
;
1673 bo
->sync_obj
= NULL
;
1674 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1675 spin_unlock(&bo
->lock
);
1676 driver
->sync_obj_unref(&tmp_obj
);
1677 spin_lock(&bo
->lock
);
1684 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1685 sync_obj_arg
= bo
->sync_obj_arg
;
1686 spin_unlock(&bo
->lock
);
1687 ret
= driver
->sync_obj_wait(sync_obj
, sync_obj_arg
,
1688 lazy
, interruptible
);
1689 if (unlikely(ret
!= 0)) {
1690 driver
->sync_obj_unref(&sync_obj
);
1691 spin_lock(&bo
->lock
);
1694 spin_lock(&bo
->lock
);
1695 if (likely(bo
->sync_obj
== sync_obj
&&
1696 bo
->sync_obj_arg
== sync_obj_arg
)) {
1697 void *tmp_obj
= bo
->sync_obj
;
1698 bo
->sync_obj
= NULL
;
1699 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1701 spin_unlock(&bo
->lock
);
1702 driver
->sync_obj_unref(&sync_obj
);
1703 driver
->sync_obj_unref(&tmp_obj
);
1704 spin_lock(&bo
->lock
);
1706 spin_unlock(&bo
->lock
);
1707 driver
->sync_obj_unref(&sync_obj
);
1708 spin_lock(&bo
->lock
);
1713 EXPORT_SYMBOL(ttm_bo_wait
);
1715 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1720 * Using ttm_bo_reserve makes sure the lru lists are updated.
1723 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1724 if (unlikely(ret
!= 0))
1726 spin_lock(&bo
->lock
);
1727 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1728 spin_unlock(&bo
->lock
);
1729 if (likely(ret
== 0))
1730 atomic_inc(&bo
->cpu_writers
);
1731 ttm_bo_unreserve(bo
);
1734 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1736 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1738 if (atomic_dec_and_test(&bo
->cpu_writers
))
1739 wake_up_all(&bo
->event_queue
);
1741 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1744 * A buffer object shrink method that tries to swap out the first
1745 * buffer object on the bo_global::swap_lru list.
1748 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1750 struct ttm_bo_global
*glob
=
1751 container_of(shrink
, struct ttm_bo_global
, shrink
);
1752 struct ttm_buffer_object
*bo
;
1755 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1757 spin_lock(&glob
->lru_lock
);
1758 while (ret
== -EBUSY
) {
1759 if (unlikely(list_empty(&glob
->swap_lru
))) {
1760 spin_unlock(&glob
->lru_lock
);
1764 bo
= list_first_entry(&glob
->swap_lru
,
1765 struct ttm_buffer_object
, swap
);
1766 kref_get(&bo
->list_kref
);
1769 * Reserve buffer. Since we unlock while sleeping, we need
1770 * to re-check that nobody removed us from the swap-list while
1774 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
1775 if (unlikely(ret
== -EBUSY
)) {
1776 spin_unlock(&glob
->lru_lock
);
1777 ttm_bo_wait_unreserved(bo
, false);
1778 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1779 spin_lock(&glob
->lru_lock
);
1784 put_count
= ttm_bo_del_from_lru(bo
);
1785 spin_unlock(&glob
->lru_lock
);
1788 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
1791 * Wait for GPU, then move to system cached.
1794 spin_lock(&bo
->lock
);
1795 ret
= ttm_bo_wait(bo
, false, false, false);
1796 spin_unlock(&bo
->lock
);
1798 if (unlikely(ret
!= 0))
1801 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1802 struct ttm_mem_reg evict_mem
;
1804 evict_mem
= bo
->mem
;
1805 evict_mem
.mm_node
= NULL
;
1806 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1807 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1809 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1810 false, false, false);
1811 if (unlikely(ret
!= 0))
1815 ttm_bo_unmap_virtual(bo
);
1818 * Swap out. Buffer will be swapped in again as soon as
1819 * anyone tries to access a ttm page.
1822 if (bo
->bdev
->driver
->swap_notify
)
1823 bo
->bdev
->driver
->swap_notify(bo
);
1825 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistant_swap_storage
);
1830 * Unreserve without putting on LRU to avoid swapping out an
1831 * already swapped buffer.
1834 atomic_set(&bo
->reserved
, 0);
1835 wake_up_all(&bo
->event_queue
);
1836 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1840 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1842 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1845 EXPORT_SYMBOL(ttm_bo_swapout_all
);