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
" io_offset: 0x%08lX\n", man
->io_offset
);
83 printk(KERN_ERR TTM_PFX
" io_size: %ld\n", man
->io_size
);
84 printk(KERN_ERR TTM_PFX
" size: %llu\n", man
->size
);
85 printk(KERN_ERR TTM_PFX
" available_caching: 0x%08X\n",
86 man
->available_caching
);
87 printk(KERN_ERR TTM_PFX
" default_caching: 0x%08X\n",
88 man
->default_caching
);
89 if (mem_type
!= TTM_PL_SYSTEM
) {
90 spin_lock(&bdev
->glob
->lru_lock
);
91 drm_mm_debug_table(&man
->manager
, TTM_PFX
);
92 spin_unlock(&bdev
->glob
->lru_lock
);
96 static void ttm_bo_mem_space_debug(struct ttm_buffer_object
*bo
,
97 struct ttm_placement
*placement
)
101 printk(KERN_ERR TTM_PFX
"No space for %p (%lu pages, %luK, %luM)\n",
102 bo
, bo
->mem
.num_pages
, bo
->mem
.size
>> 10,
104 for (i
= 0; i
< placement
->num_placement
; i
++) {
105 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
109 printk(KERN_ERR TTM_PFX
" placement[%d]=0x%08X (%d)\n",
110 i
, placement
->placement
[i
], mem_type
);
111 ttm_mem_type_debug(bo
->bdev
, mem_type
);
115 static ssize_t
ttm_bo_global_show(struct kobject
*kobj
,
116 struct attribute
*attr
,
119 struct ttm_bo_global
*glob
=
120 container_of(kobj
, struct ttm_bo_global
, kobj
);
122 return snprintf(buffer
, PAGE_SIZE
, "%lu\n",
123 (unsigned long) atomic_read(&glob
->bo_count
));
126 static struct attribute
*ttm_bo_global_attrs
[] = {
131 static struct sysfs_ops ttm_bo_global_ops
= {
132 .show
= &ttm_bo_global_show
135 static struct kobj_type ttm_bo_glob_kobj_type
= {
136 .release
= &ttm_bo_global_kobj_release
,
137 .sysfs_ops
= &ttm_bo_global_ops
,
138 .default_attrs
= ttm_bo_global_attrs
142 static inline uint32_t ttm_bo_type_flags(unsigned type
)
147 static void ttm_bo_release_list(struct kref
*list_kref
)
149 struct ttm_buffer_object
*bo
=
150 container_of(list_kref
, struct ttm_buffer_object
, list_kref
);
151 struct ttm_bo_device
*bdev
= bo
->bdev
;
153 BUG_ON(atomic_read(&bo
->list_kref
.refcount
));
154 BUG_ON(atomic_read(&bo
->kref
.refcount
));
155 BUG_ON(atomic_read(&bo
->cpu_writers
));
156 BUG_ON(bo
->sync_obj
!= NULL
);
157 BUG_ON(bo
->mem
.mm_node
!= NULL
);
158 BUG_ON(!list_empty(&bo
->lru
));
159 BUG_ON(!list_empty(&bo
->ddestroy
));
162 ttm_tt_destroy(bo
->ttm
);
163 atomic_dec(&bo
->glob
->bo_count
);
167 ttm_mem_global_free(bdev
->glob
->mem_glob
, bo
->acc_size
);
172 int ttm_bo_wait_unreserved(struct ttm_buffer_object
*bo
, bool interruptible
)
178 ret
= wait_event_interruptible(bo
->event_queue
,
179 atomic_read(&bo
->reserved
) == 0);
180 if (unlikely(ret
!= 0))
183 wait_event(bo
->event_queue
, atomic_read(&bo
->reserved
) == 0);
187 EXPORT_SYMBOL(ttm_bo_wait_unreserved
);
189 static void ttm_bo_add_to_lru(struct ttm_buffer_object
*bo
)
191 struct ttm_bo_device
*bdev
= bo
->bdev
;
192 struct ttm_mem_type_manager
*man
;
194 BUG_ON(!atomic_read(&bo
->reserved
));
196 if (!(bo
->mem
.placement
& TTM_PL_FLAG_NO_EVICT
)) {
198 BUG_ON(!list_empty(&bo
->lru
));
200 man
= &bdev
->man
[bo
->mem
.mem_type
];
201 list_add_tail(&bo
->lru
, &man
->lru
);
202 kref_get(&bo
->list_kref
);
204 if (bo
->ttm
!= NULL
) {
205 list_add_tail(&bo
->swap
, &bo
->glob
->swap_lru
);
206 kref_get(&bo
->list_kref
);
212 * Call with the lru_lock held.
215 static int ttm_bo_del_from_lru(struct ttm_buffer_object
*bo
)
219 if (!list_empty(&bo
->swap
)) {
220 list_del_init(&bo
->swap
);
223 if (!list_empty(&bo
->lru
)) {
224 list_del_init(&bo
->lru
);
229 * TODO: Add a driver hook to delete from
230 * driver-specific LRU's here.
236 int ttm_bo_reserve_locked(struct ttm_buffer_object
*bo
,
238 bool no_wait
, bool use_sequence
, uint32_t sequence
)
240 struct ttm_bo_global
*glob
= bo
->glob
;
243 while (unlikely(atomic_cmpxchg(&bo
->reserved
, 0, 1) != 0)) {
244 if (use_sequence
&& bo
->seq_valid
&&
245 (sequence
- bo
->val_seq
< (1 << 31))) {
252 spin_unlock(&glob
->lru_lock
);
253 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
254 spin_lock(&glob
->lru_lock
);
261 bo
->val_seq
= sequence
;
262 bo
->seq_valid
= true;
264 bo
->seq_valid
= false;
269 EXPORT_SYMBOL(ttm_bo_reserve
);
271 static void ttm_bo_ref_bug(struct kref
*list_kref
)
276 int ttm_bo_reserve(struct ttm_buffer_object
*bo
,
278 bool no_wait
, bool use_sequence
, uint32_t sequence
)
280 struct ttm_bo_global
*glob
= bo
->glob
;
284 spin_lock(&glob
->lru_lock
);
285 ret
= ttm_bo_reserve_locked(bo
, interruptible
, no_wait
, use_sequence
,
287 if (likely(ret
== 0))
288 put_count
= ttm_bo_del_from_lru(bo
);
289 spin_unlock(&glob
->lru_lock
);
292 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
297 void ttm_bo_unreserve(struct ttm_buffer_object
*bo
)
299 struct ttm_bo_global
*glob
= bo
->glob
;
301 spin_lock(&glob
->lru_lock
);
302 ttm_bo_add_to_lru(bo
);
303 atomic_set(&bo
->reserved
, 0);
304 wake_up_all(&bo
->event_queue
);
305 spin_unlock(&glob
->lru_lock
);
307 EXPORT_SYMBOL(ttm_bo_unreserve
);
310 * Call bo->mutex locked.
312 static int ttm_bo_add_ttm(struct ttm_buffer_object
*bo
, bool zero_alloc
)
314 struct ttm_bo_device
*bdev
= bo
->bdev
;
315 struct ttm_bo_global
*glob
= bo
->glob
;
317 uint32_t page_flags
= 0;
319 TTM_ASSERT_LOCKED(&bo
->mutex
);
322 if (bdev
->need_dma32
)
323 page_flags
|= TTM_PAGE_FLAG_DMA32
;
326 case ttm_bo_type_device
:
328 page_flags
|= TTM_PAGE_FLAG_ZERO_ALLOC
;
329 case ttm_bo_type_kernel
:
330 bo
->ttm
= ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
331 page_flags
, glob
->dummy_read_page
);
332 if (unlikely(bo
->ttm
== NULL
))
335 case ttm_bo_type_user
:
336 bo
->ttm
= ttm_tt_create(bdev
, bo
->num_pages
<< PAGE_SHIFT
,
337 page_flags
| TTM_PAGE_FLAG_USER
,
338 glob
->dummy_read_page
);
339 if (unlikely(bo
->ttm
== NULL
)) {
344 ret
= ttm_tt_set_user(bo
->ttm
, current
,
345 bo
->buffer_start
, bo
->num_pages
);
346 if (unlikely(ret
!= 0))
347 ttm_tt_destroy(bo
->ttm
);
350 printk(KERN_ERR TTM_PFX
"Illegal buffer object type\n");
358 static int ttm_bo_handle_move_mem(struct ttm_buffer_object
*bo
,
359 struct ttm_mem_reg
*mem
,
360 bool evict
, bool interruptible
, bool no_wait
)
362 struct ttm_bo_device
*bdev
= bo
->bdev
;
363 bool old_is_pci
= ttm_mem_reg_is_pci(bdev
, &bo
->mem
);
364 bool new_is_pci
= ttm_mem_reg_is_pci(bdev
, mem
);
365 struct ttm_mem_type_manager
*old_man
= &bdev
->man
[bo
->mem
.mem_type
];
366 struct ttm_mem_type_manager
*new_man
= &bdev
->man
[mem
->mem_type
];
369 if (old_is_pci
|| new_is_pci
||
370 ((mem
->placement
& bo
->mem
.placement
& TTM_PL_MASK_CACHING
) == 0))
371 ttm_bo_unmap_virtual(bo
);
374 * Create and bind a ttm if required.
377 if (!(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && (bo
->ttm
== NULL
)) {
378 ret
= ttm_bo_add_ttm(bo
, false);
382 ret
= ttm_tt_set_placement_caching(bo
->ttm
, mem
->placement
);
386 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
387 ret
= ttm_tt_bind(bo
->ttm
, mem
);
392 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
) {
400 if (bdev
->driver
->move_notify
)
401 bdev
->driver
->move_notify(bo
, mem
);
403 if (!(old_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) &&
404 !(new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
))
405 ret
= ttm_bo_move_ttm(bo
, evict
, no_wait
, mem
);
406 else if (bdev
->driver
->move
)
407 ret
= bdev
->driver
->move(bo
, evict
, interruptible
,
410 ret
= ttm_bo_move_memcpy(bo
, evict
, no_wait
, mem
);
417 ret
= bdev
->driver
->invalidate_caches(bdev
, bo
->mem
.placement
);
419 printk(KERN_ERR TTM_PFX
"Can not flush read caches\n");
423 if (bo
->mem
.mm_node
) {
424 spin_lock(&bo
->lock
);
425 bo
->offset
= (bo
->mem
.mm_node
->start
<< PAGE_SHIFT
) +
426 bdev
->man
[bo
->mem
.mem_type
].gpu_offset
;
427 bo
->cur_placement
= bo
->mem
.placement
;
428 spin_unlock(&bo
->lock
);
435 new_man
= &bdev
->man
[bo
->mem
.mem_type
];
436 if ((new_man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && bo
->ttm
) {
437 ttm_tt_unbind(bo
->ttm
);
438 ttm_tt_destroy(bo
->ttm
);
446 * If bo idle, remove from delayed- and lru lists, and unref.
447 * If not idle, and already on delayed list, do nothing.
448 * If not idle, and not on delayed list, put on delayed list,
449 * up the list_kref and schedule a delayed list check.
452 static int ttm_bo_cleanup_refs(struct ttm_buffer_object
*bo
, bool remove_all
)
454 struct ttm_bo_device
*bdev
= bo
->bdev
;
455 struct ttm_bo_global
*glob
= bo
->glob
;
456 struct ttm_bo_driver
*driver
= bdev
->driver
;
459 spin_lock(&bo
->lock
);
460 (void) ttm_bo_wait(bo
, false, false, !remove_all
);
465 spin_unlock(&bo
->lock
);
467 spin_lock(&glob
->lru_lock
);
468 put_count
= ttm_bo_del_from_lru(bo
);
470 ret
= ttm_bo_reserve_locked(bo
, false, false, false, 0);
473 ttm_tt_unbind(bo
->ttm
);
475 if (!list_empty(&bo
->ddestroy
)) {
476 list_del_init(&bo
->ddestroy
);
479 if (bo
->mem
.mm_node
) {
480 bo
->mem
.mm_node
->private = NULL
;
481 drm_mm_put_block(bo
->mem
.mm_node
);
482 bo
->mem
.mm_node
= NULL
;
484 spin_unlock(&glob
->lru_lock
);
486 atomic_set(&bo
->reserved
, 0);
489 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
494 spin_lock(&glob
->lru_lock
);
495 if (list_empty(&bo
->ddestroy
)) {
496 void *sync_obj
= bo
->sync_obj
;
497 void *sync_obj_arg
= bo
->sync_obj_arg
;
499 kref_get(&bo
->list_kref
);
500 list_add_tail(&bo
->ddestroy
, &bdev
->ddestroy
);
501 spin_unlock(&glob
->lru_lock
);
502 spin_unlock(&bo
->lock
);
505 driver
->sync_obj_flush(sync_obj
, sync_obj_arg
);
506 schedule_delayed_work(&bdev
->wq
,
507 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
511 spin_unlock(&glob
->lru_lock
);
512 spin_unlock(&bo
->lock
);
520 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
521 * encountered buffers.
524 static int ttm_bo_delayed_delete(struct ttm_bo_device
*bdev
, bool remove_all
)
526 struct ttm_bo_global
*glob
= bdev
->glob
;
527 struct ttm_buffer_object
*entry
= NULL
;
530 spin_lock(&glob
->lru_lock
);
531 if (list_empty(&bdev
->ddestroy
))
534 entry
= list_first_entry(&bdev
->ddestroy
,
535 struct ttm_buffer_object
, ddestroy
);
536 kref_get(&entry
->list_kref
);
539 struct ttm_buffer_object
*nentry
= NULL
;
541 if (entry
->ddestroy
.next
!= &bdev
->ddestroy
) {
542 nentry
= list_first_entry(&entry
->ddestroy
,
543 struct ttm_buffer_object
, ddestroy
);
544 kref_get(&nentry
->list_kref
);
547 spin_unlock(&glob
->lru_lock
);
548 ret
= ttm_bo_cleanup_refs(entry
, remove_all
);
549 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
555 spin_lock(&glob
->lru_lock
);
556 if (list_empty(&entry
->ddestroy
))
561 spin_unlock(&glob
->lru_lock
);
564 kref_put(&entry
->list_kref
, ttm_bo_release_list
);
568 static void ttm_bo_delayed_workqueue(struct work_struct
*work
)
570 struct ttm_bo_device
*bdev
=
571 container_of(work
, struct ttm_bo_device
, wq
.work
);
573 if (ttm_bo_delayed_delete(bdev
, false)) {
574 schedule_delayed_work(&bdev
->wq
,
575 ((HZ
/ 100) < 1) ? 1 : HZ
/ 100);
579 static void ttm_bo_release(struct kref
*kref
)
581 struct ttm_buffer_object
*bo
=
582 container_of(kref
, struct ttm_buffer_object
, kref
);
583 struct ttm_bo_device
*bdev
= bo
->bdev
;
585 if (likely(bo
->vm_node
!= NULL
)) {
586 rb_erase(&bo
->vm_rb
, &bdev
->addr_space_rb
);
587 drm_mm_put_block(bo
->vm_node
);
590 write_unlock(&bdev
->vm_lock
);
591 ttm_bo_cleanup_refs(bo
, false);
592 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
593 write_lock(&bdev
->vm_lock
);
596 void ttm_bo_unref(struct ttm_buffer_object
**p_bo
)
598 struct ttm_buffer_object
*bo
= *p_bo
;
599 struct ttm_bo_device
*bdev
= bo
->bdev
;
602 write_lock(&bdev
->vm_lock
);
603 kref_put(&bo
->kref
, ttm_bo_release
);
604 write_unlock(&bdev
->vm_lock
);
606 EXPORT_SYMBOL(ttm_bo_unref
);
608 static int ttm_bo_evict(struct ttm_buffer_object
*bo
, bool interruptible
,
611 struct ttm_bo_device
*bdev
= bo
->bdev
;
612 struct ttm_bo_global
*glob
= bo
->glob
;
613 struct ttm_mem_reg evict_mem
;
614 struct ttm_placement placement
;
617 spin_lock(&bo
->lock
);
618 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait
);
619 spin_unlock(&bo
->lock
);
621 if (unlikely(ret
!= 0)) {
622 if (ret
!= -ERESTARTSYS
) {
623 printk(KERN_ERR TTM_PFX
624 "Failed to expire sync object before "
625 "buffer eviction.\n");
630 BUG_ON(!atomic_read(&bo
->reserved
));
633 evict_mem
.mm_node
= NULL
;
637 placement
.num_placement
= 0;
638 placement
.num_busy_placement
= 0;
639 bdev
->driver
->evict_flags(bo
, &placement
);
640 ret
= ttm_bo_mem_space(bo
, &placement
, &evict_mem
, interruptible
,
643 if (ret
!= -ERESTARTSYS
) {
644 printk(KERN_ERR TTM_PFX
645 "Failed to find memory space for "
646 "buffer 0x%p eviction.\n", bo
);
647 ttm_bo_mem_space_debug(bo
, &placement
);
652 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true, interruptible
,
655 if (ret
!= -ERESTARTSYS
)
656 printk(KERN_ERR TTM_PFX
"Buffer eviction failed\n");
657 spin_lock(&glob
->lru_lock
);
658 if (evict_mem
.mm_node
) {
659 evict_mem
.mm_node
->private = NULL
;
660 drm_mm_put_block(evict_mem
.mm_node
);
661 evict_mem
.mm_node
= NULL
;
663 spin_unlock(&glob
->lru_lock
);
671 static int ttm_mem_evict_first(struct ttm_bo_device
*bdev
,
673 bool interruptible
, bool no_wait
)
675 struct ttm_bo_global
*glob
= bdev
->glob
;
676 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
677 struct ttm_buffer_object
*bo
;
678 int ret
, put_count
= 0;
681 spin_lock(&glob
->lru_lock
);
682 if (list_empty(&man
->lru
)) {
683 spin_unlock(&glob
->lru_lock
);
687 bo
= list_first_entry(&man
->lru
, struct ttm_buffer_object
, lru
);
688 kref_get(&bo
->list_kref
);
690 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
692 if (unlikely(ret
== -EBUSY
)) {
693 spin_unlock(&glob
->lru_lock
);
694 if (likely(!no_wait
))
695 ret
= ttm_bo_wait_unreserved(bo
, interruptible
);
697 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
700 * We *need* to retry after releasing the lru lock.
703 if (unlikely(ret
!= 0))
708 put_count
= ttm_bo_del_from_lru(bo
);
709 spin_unlock(&glob
->lru_lock
);
714 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
716 ret
= ttm_bo_evict(bo
, interruptible
, no_wait
);
717 ttm_bo_unreserve(bo
);
719 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
723 static int ttm_bo_man_get_node(struct ttm_buffer_object
*bo
,
724 struct ttm_mem_type_manager
*man
,
725 struct ttm_placement
*placement
,
726 struct ttm_mem_reg
*mem
,
727 struct drm_mm_node
**node
)
729 struct ttm_bo_global
*glob
= bo
->glob
;
733 lpfn
= placement
->lpfn
;
738 ret
= drm_mm_pre_get(&man
->manager
);
742 spin_lock(&glob
->lru_lock
);
743 *node
= drm_mm_search_free_in_range(&man
->manager
,
744 mem
->num_pages
, mem
->page_alignment
,
745 placement
->fpfn
, lpfn
, 1);
746 if (unlikely(*node
== NULL
)) {
747 spin_unlock(&glob
->lru_lock
);
750 *node
= drm_mm_get_block_atomic_range(*node
, mem
->num_pages
,
754 spin_unlock(&glob
->lru_lock
);
755 } while (*node
== NULL
);
760 * Repeatedly evict memory from the LRU for @mem_type until we create enough
761 * space, or we've evicted everything and there isn't enough space.
763 static int ttm_bo_mem_force_space(struct ttm_buffer_object
*bo
,
765 struct ttm_placement
*placement
,
766 struct ttm_mem_reg
*mem
,
767 bool interruptible
, bool no_wait
)
769 struct ttm_bo_device
*bdev
= bo
->bdev
;
770 struct ttm_bo_global
*glob
= bdev
->glob
;
771 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
772 struct drm_mm_node
*node
;
776 ret
= ttm_bo_man_get_node(bo
, man
, placement
, mem
, &node
);
777 if (unlikely(ret
!= 0))
781 spin_lock(&glob
->lru_lock
);
782 if (list_empty(&man
->lru
)) {
783 spin_unlock(&glob
->lru_lock
);
786 spin_unlock(&glob
->lru_lock
);
787 ret
= ttm_mem_evict_first(bdev
, mem_type
, interruptible
,
789 if (unlikely(ret
!= 0))
795 mem
->mem_type
= mem_type
;
799 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager
*man
,
800 uint32_t cur_placement
,
801 uint32_t proposed_placement
)
803 uint32_t caching
= proposed_placement
& TTM_PL_MASK_CACHING
;
804 uint32_t result
= proposed_placement
& ~TTM_PL_MASK_CACHING
;
807 * Keep current caching if possible.
810 if ((cur_placement
& caching
) != 0)
811 result
|= (cur_placement
& caching
);
812 else if ((man
->default_caching
& caching
) != 0)
813 result
|= man
->default_caching
;
814 else if ((TTM_PL_FLAG_CACHED
& caching
) != 0)
815 result
|= TTM_PL_FLAG_CACHED
;
816 else if ((TTM_PL_FLAG_WC
& caching
) != 0)
817 result
|= TTM_PL_FLAG_WC
;
818 else if ((TTM_PL_FLAG_UNCACHED
& caching
) != 0)
819 result
|= TTM_PL_FLAG_UNCACHED
;
824 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager
*man
,
827 uint32_t proposed_placement
,
828 uint32_t *masked_placement
)
830 uint32_t cur_flags
= ttm_bo_type_flags(mem_type
);
832 if ((man
->flags
& TTM_MEMTYPE_FLAG_FIXED
) && disallow_fixed
)
835 if ((cur_flags
& proposed_placement
& TTM_PL_MASK_MEM
) == 0)
838 if ((proposed_placement
& man
->available_caching
) == 0)
841 cur_flags
|= (proposed_placement
& man
->available_caching
);
843 *masked_placement
= cur_flags
;
848 * Creates space for memory region @mem according to its type.
850 * This function first searches for free space in compatible memory types in
851 * the priority order defined by the driver. If free space isn't found, then
852 * ttm_bo_mem_force_space is attempted in priority order to evict and find
855 int ttm_bo_mem_space(struct ttm_buffer_object
*bo
,
856 struct ttm_placement
*placement
,
857 struct ttm_mem_reg
*mem
,
858 bool interruptible
, bool no_wait
)
860 struct ttm_bo_device
*bdev
= bo
->bdev
;
861 struct ttm_mem_type_manager
*man
;
862 uint32_t mem_type
= TTM_PL_SYSTEM
;
863 uint32_t cur_flags
= 0;
864 bool type_found
= false;
865 bool type_ok
= false;
866 bool has_erestartsys
= false;
867 struct drm_mm_node
*node
= NULL
;
871 for (i
= 0; i
< placement
->num_placement
; ++i
) {
872 ret
= ttm_mem_type_from_flags(placement
->placement
[i
],
876 man
= &bdev
->man
[mem_type
];
878 type_ok
= ttm_bo_mt_compatible(man
,
879 bo
->type
== ttm_bo_type_user
,
881 placement
->placement
[i
],
887 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
890 * Use the access and other non-mapping-related flag bits from
891 * the memory placement flags to the current flags
893 ttm_flag_masked(&cur_flags
, placement
->placement
[i
],
894 ~TTM_PL_MASK_MEMTYPE
);
896 if (mem_type
== TTM_PL_SYSTEM
)
899 if (man
->has_type
&& man
->use_type
) {
901 ret
= ttm_bo_man_get_node(bo
, man
, placement
, mem
,
910 if ((type_ok
&& (mem_type
== TTM_PL_SYSTEM
)) || node
) {
912 mem
->mem_type
= mem_type
;
913 mem
->placement
= cur_flags
;
922 for (i
= 0; i
< placement
->num_busy_placement
; ++i
) {
923 ret
= ttm_mem_type_from_flags(placement
->busy_placement
[i
],
927 man
= &bdev
->man
[mem_type
];
930 if (!ttm_bo_mt_compatible(man
,
931 bo
->type
== ttm_bo_type_user
,
933 placement
->busy_placement
[i
],
937 cur_flags
= ttm_bo_select_caching(man
, bo
->mem
.placement
,
940 * Use the access and other non-mapping-related flag bits from
941 * the memory placement flags to the current flags
943 ttm_flag_masked(&cur_flags
, placement
->busy_placement
[i
],
944 ~TTM_PL_MASK_MEMTYPE
);
947 if (mem_type
== TTM_PL_SYSTEM
) {
948 mem
->mem_type
= mem_type
;
949 mem
->placement
= cur_flags
;
954 ret
= ttm_bo_mem_force_space(bo
, mem_type
, placement
, mem
,
955 interruptible
, no_wait
);
956 if (ret
== 0 && mem
->mm_node
) {
957 mem
->placement
= cur_flags
;
958 mem
->mm_node
->private = bo
;
961 if (ret
== -ERESTARTSYS
)
962 has_erestartsys
= true;
964 ret
= (has_erestartsys
) ? -ERESTARTSYS
: -ENOMEM
;
967 EXPORT_SYMBOL(ttm_bo_mem_space
);
969 int ttm_bo_wait_cpu(struct ttm_buffer_object
*bo
, bool no_wait
)
971 if ((atomic_read(&bo
->cpu_writers
) > 0) && no_wait
)
974 return wait_event_interruptible(bo
->event_queue
,
975 atomic_read(&bo
->cpu_writers
) == 0);
977 EXPORT_SYMBOL(ttm_bo_wait_cpu
);
979 int ttm_bo_move_buffer(struct ttm_buffer_object
*bo
,
980 struct ttm_placement
*placement
,
981 bool interruptible
, bool no_wait
)
983 struct ttm_bo_global
*glob
= bo
->glob
;
985 struct ttm_mem_reg mem
;
987 BUG_ON(!atomic_read(&bo
->reserved
));
990 * FIXME: It's possible to pipeline buffer moves.
991 * Have the driver move function wait for idle when necessary,
992 * instead of doing it here.
994 spin_lock(&bo
->lock
);
995 ret
= ttm_bo_wait(bo
, false, interruptible
, no_wait
);
996 spin_unlock(&bo
->lock
);
999 mem
.num_pages
= bo
->num_pages
;
1000 mem
.size
= mem
.num_pages
<< PAGE_SHIFT
;
1001 mem
.page_alignment
= bo
->mem
.page_alignment
;
1003 * Determine where to move the buffer.
1005 ret
= ttm_bo_mem_space(bo
, placement
, &mem
, interruptible
, no_wait
);
1008 ret
= ttm_bo_handle_move_mem(bo
, &mem
, false, interruptible
, no_wait
);
1010 if (ret
&& mem
.mm_node
) {
1011 spin_lock(&glob
->lru_lock
);
1012 mem
.mm_node
->private = NULL
;
1013 drm_mm_put_block(mem
.mm_node
);
1014 spin_unlock(&glob
->lru_lock
);
1019 static int ttm_bo_mem_compat(struct ttm_placement
*placement
,
1020 struct ttm_mem_reg
*mem
)
1023 struct drm_mm_node
*node
= mem
->mm_node
;
1025 if (node
&& placement
->lpfn
!= 0 &&
1026 (node
->start
< placement
->fpfn
||
1027 node
->start
+ node
->size
> placement
->lpfn
))
1030 for (i
= 0; i
< placement
->num_placement
; i
++) {
1031 if ((placement
->placement
[i
] & mem
->placement
&
1032 TTM_PL_MASK_CACHING
) &&
1033 (placement
->placement
[i
] & mem
->placement
&
1040 int ttm_bo_validate(struct ttm_buffer_object
*bo
,
1041 struct ttm_placement
*placement
,
1042 bool interruptible
, bool no_wait
)
1046 BUG_ON(!atomic_read(&bo
->reserved
));
1047 /* Check that range is valid */
1048 if (placement
->lpfn
|| placement
->fpfn
)
1049 if (placement
->fpfn
> placement
->lpfn
||
1050 (placement
->lpfn
- placement
->fpfn
) < bo
->num_pages
)
1053 * Check whether we need to move buffer.
1055 ret
= ttm_bo_mem_compat(placement
, &bo
->mem
);
1057 ret
= ttm_bo_move_buffer(bo
, placement
, interruptible
, no_wait
);
1062 * Use the access and other non-mapping-related flag bits from
1063 * the compatible memory placement flags to the active flags
1065 ttm_flag_masked(&bo
->mem
.placement
, placement
->placement
[ret
],
1066 ~TTM_PL_MASK_MEMTYPE
);
1069 * We might need to add a TTM.
1071 if (bo
->mem
.mem_type
== TTM_PL_SYSTEM
&& bo
->ttm
== NULL
) {
1072 ret
= ttm_bo_add_ttm(bo
, true);
1078 EXPORT_SYMBOL(ttm_bo_validate
);
1080 int ttm_bo_check_placement(struct ttm_buffer_object
*bo
,
1081 struct ttm_placement
*placement
)
1085 if (placement
->fpfn
|| placement
->lpfn
) {
1086 if (bo
->mem
.num_pages
> (placement
->lpfn
- placement
->fpfn
)) {
1087 printk(KERN_ERR TTM_PFX
"Page number range to small "
1088 "Need %lu pages, range is [%u, %u]\n",
1089 bo
->mem
.num_pages
, placement
->fpfn
,
1094 for (i
= 0; i
< placement
->num_placement
; i
++) {
1095 if (!capable(CAP_SYS_ADMIN
)) {
1096 if (placement
->placement
[i
] & TTM_PL_FLAG_NO_EVICT
) {
1097 printk(KERN_ERR TTM_PFX
"Need to be root to "
1098 "modify NO_EVICT status.\n");
1103 for (i
= 0; i
< placement
->num_busy_placement
; i
++) {
1104 if (!capable(CAP_SYS_ADMIN
)) {
1105 if (placement
->busy_placement
[i
] & TTM_PL_FLAG_NO_EVICT
) {
1106 printk(KERN_ERR TTM_PFX
"Need to be root to "
1107 "modify NO_EVICT status.\n");
1115 int ttm_bo_init(struct ttm_bo_device
*bdev
,
1116 struct ttm_buffer_object
*bo
,
1118 enum ttm_bo_type type
,
1119 struct ttm_placement
*placement
,
1120 uint32_t page_alignment
,
1121 unsigned long buffer_start
,
1123 struct file
*persistant_swap_storage
,
1125 void (*destroy
) (struct ttm_buffer_object
*))
1128 unsigned long num_pages
;
1130 size
+= buffer_start
& ~PAGE_MASK
;
1131 num_pages
= (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1132 if (num_pages
== 0) {
1133 printk(KERN_ERR TTM_PFX
"Illegal buffer object size.\n");
1136 bo
->destroy
= destroy
;
1138 spin_lock_init(&bo
->lock
);
1139 kref_init(&bo
->kref
);
1140 kref_init(&bo
->list_kref
);
1141 atomic_set(&bo
->cpu_writers
, 0);
1142 atomic_set(&bo
->reserved
, 1);
1143 init_waitqueue_head(&bo
->event_queue
);
1144 INIT_LIST_HEAD(&bo
->lru
);
1145 INIT_LIST_HEAD(&bo
->ddestroy
);
1146 INIT_LIST_HEAD(&bo
->swap
);
1148 bo
->glob
= bdev
->glob
;
1150 bo
->num_pages
= num_pages
;
1151 bo
->mem
.size
= num_pages
<< PAGE_SHIFT
;
1152 bo
->mem
.mem_type
= TTM_PL_SYSTEM
;
1153 bo
->mem
.num_pages
= bo
->num_pages
;
1154 bo
->mem
.mm_node
= NULL
;
1155 bo
->mem
.page_alignment
= page_alignment
;
1156 bo
->buffer_start
= buffer_start
& PAGE_MASK
;
1158 bo
->mem
.placement
= (TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
);
1159 bo
->seq_valid
= false;
1160 bo
->persistant_swap_storage
= persistant_swap_storage
;
1161 bo
->acc_size
= acc_size
;
1162 atomic_inc(&bo
->glob
->bo_count
);
1164 ret
= ttm_bo_check_placement(bo
, placement
);
1165 if (unlikely(ret
!= 0))
1169 * For ttm_bo_type_device buffers, allocate
1170 * address space from the device.
1172 if (bo
->type
== ttm_bo_type_device
) {
1173 ret
= ttm_bo_setup_vm(bo
);
1178 ret
= ttm_bo_validate(bo
, placement
, interruptible
, false);
1182 ttm_bo_unreserve(bo
);
1186 ttm_bo_unreserve(bo
);
1191 EXPORT_SYMBOL(ttm_bo_init
);
1193 static inline size_t ttm_bo_size(struct ttm_bo_global
*glob
,
1194 unsigned long num_pages
)
1196 size_t page_array_size
= (num_pages
* sizeof(void *) + PAGE_SIZE
- 1) &
1199 return glob
->ttm_bo_size
+ 2 * page_array_size
;
1202 int ttm_bo_create(struct ttm_bo_device
*bdev
,
1204 enum ttm_bo_type type
,
1205 struct ttm_placement
*placement
,
1206 uint32_t page_alignment
,
1207 unsigned long buffer_start
,
1209 struct file
*persistant_swap_storage
,
1210 struct ttm_buffer_object
**p_bo
)
1212 struct ttm_buffer_object
*bo
;
1213 struct ttm_mem_global
*mem_glob
= bdev
->glob
->mem_glob
;
1217 ttm_bo_size(bdev
->glob
, (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
);
1218 ret
= ttm_mem_global_alloc(mem_glob
, acc_size
, false, false);
1219 if (unlikely(ret
!= 0))
1222 bo
= kzalloc(sizeof(*bo
), GFP_KERNEL
);
1224 if (unlikely(bo
== NULL
)) {
1225 ttm_mem_global_free(mem_glob
, acc_size
);
1229 ret
= ttm_bo_init(bdev
, bo
, size
, type
, placement
, page_alignment
,
1230 buffer_start
, interruptible
,
1231 persistant_swap_storage
, acc_size
, NULL
);
1232 if (likely(ret
== 0))
1238 static int ttm_bo_force_list_clean(struct ttm_bo_device
*bdev
,
1239 unsigned mem_type
, bool allow_errors
)
1241 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1242 struct ttm_bo_global
*glob
= bdev
->glob
;
1246 * Can't use standard list traversal since we're unlocking.
1249 spin_lock(&glob
->lru_lock
);
1250 while (!list_empty(&man
->lru
)) {
1251 spin_unlock(&glob
->lru_lock
);
1252 ret
= ttm_mem_evict_first(bdev
, mem_type
, false, false);
1257 printk(KERN_ERR TTM_PFX
1258 "Cleanup eviction failed\n");
1261 spin_lock(&glob
->lru_lock
);
1263 spin_unlock(&glob
->lru_lock
);
1267 int ttm_bo_clean_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1269 struct ttm_bo_global
*glob
= bdev
->glob
;
1270 struct ttm_mem_type_manager
*man
;
1273 if (mem_type
>= TTM_NUM_MEM_TYPES
) {
1274 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", mem_type
);
1277 man
= &bdev
->man
[mem_type
];
1279 if (!man
->has_type
) {
1280 printk(KERN_ERR TTM_PFX
"Trying to take down uninitialized "
1281 "memory manager type %u\n", mem_type
);
1285 man
->use_type
= false;
1286 man
->has_type
= false;
1290 ttm_bo_force_list_clean(bdev
, mem_type
, false);
1292 spin_lock(&glob
->lru_lock
);
1293 if (drm_mm_clean(&man
->manager
))
1294 drm_mm_takedown(&man
->manager
);
1298 spin_unlock(&glob
->lru_lock
);
1303 EXPORT_SYMBOL(ttm_bo_clean_mm
);
1305 int ttm_bo_evict_mm(struct ttm_bo_device
*bdev
, unsigned mem_type
)
1307 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem_type
];
1309 if (mem_type
== 0 || mem_type
>= TTM_NUM_MEM_TYPES
) {
1310 printk(KERN_ERR TTM_PFX
1311 "Illegal memory manager memory type %u.\n",
1316 if (!man
->has_type
) {
1317 printk(KERN_ERR TTM_PFX
1318 "Memory type %u has not been initialized.\n",
1323 return ttm_bo_force_list_clean(bdev
, mem_type
, true);
1325 EXPORT_SYMBOL(ttm_bo_evict_mm
);
1327 int ttm_bo_init_mm(struct ttm_bo_device
*bdev
, unsigned type
,
1328 unsigned long p_size
)
1331 struct ttm_mem_type_manager
*man
;
1333 if (type
>= TTM_NUM_MEM_TYPES
) {
1334 printk(KERN_ERR TTM_PFX
"Illegal memory type %d\n", type
);
1338 man
= &bdev
->man
[type
];
1339 if (man
->has_type
) {
1340 printk(KERN_ERR TTM_PFX
1341 "Memory manager already initialized for type %d\n",
1346 ret
= bdev
->driver
->init_mem_type(bdev
, type
, man
);
1351 if (type
!= TTM_PL_SYSTEM
) {
1353 printk(KERN_ERR TTM_PFX
1354 "Zero size memory manager type %d\n",
1358 ret
= drm_mm_init(&man
->manager
, 0, p_size
);
1362 man
->has_type
= true;
1363 man
->use_type
= true;
1366 INIT_LIST_HEAD(&man
->lru
);
1370 EXPORT_SYMBOL(ttm_bo_init_mm
);
1372 static void ttm_bo_global_kobj_release(struct kobject
*kobj
)
1374 struct ttm_bo_global
*glob
=
1375 container_of(kobj
, struct ttm_bo_global
, kobj
);
1377 ttm_mem_unregister_shrink(glob
->mem_glob
, &glob
->shrink
);
1378 __free_page(glob
->dummy_read_page
);
1382 void ttm_bo_global_release(struct ttm_global_reference
*ref
)
1384 struct ttm_bo_global
*glob
= ref
->object
;
1386 kobject_del(&glob
->kobj
);
1387 kobject_put(&glob
->kobj
);
1389 EXPORT_SYMBOL(ttm_bo_global_release
);
1391 int ttm_bo_global_init(struct ttm_global_reference
*ref
)
1393 struct ttm_bo_global_ref
*bo_ref
=
1394 container_of(ref
, struct ttm_bo_global_ref
, ref
);
1395 struct ttm_bo_global
*glob
= ref
->object
;
1398 mutex_init(&glob
->device_list_mutex
);
1399 spin_lock_init(&glob
->lru_lock
);
1400 glob
->mem_glob
= bo_ref
->mem_glob
;
1401 glob
->dummy_read_page
= alloc_page(__GFP_ZERO
| GFP_DMA32
);
1403 if (unlikely(glob
->dummy_read_page
== NULL
)) {
1408 INIT_LIST_HEAD(&glob
->swap_lru
);
1409 INIT_LIST_HEAD(&glob
->device_list
);
1411 ttm_mem_init_shrink(&glob
->shrink
, ttm_bo_swapout
);
1412 ret
= ttm_mem_register_shrink(glob
->mem_glob
, &glob
->shrink
);
1413 if (unlikely(ret
!= 0)) {
1414 printk(KERN_ERR TTM_PFX
1415 "Could not register buffer object swapout.\n");
1419 glob
->ttm_bo_extra_size
=
1420 ttm_round_pot(sizeof(struct ttm_tt
)) +
1421 ttm_round_pot(sizeof(struct ttm_backend
));
1423 glob
->ttm_bo_size
= glob
->ttm_bo_extra_size
+
1424 ttm_round_pot(sizeof(struct ttm_buffer_object
));
1426 atomic_set(&glob
->bo_count
, 0);
1428 ret
= kobject_init_and_add(
1429 &glob
->kobj
, &ttm_bo_glob_kobj_type
, ttm_get_kobj(), "buffer_objects");
1430 if (unlikely(ret
!= 0))
1431 kobject_put(&glob
->kobj
);
1434 __free_page(glob
->dummy_read_page
);
1439 EXPORT_SYMBOL(ttm_bo_global_init
);
1442 int ttm_bo_device_release(struct ttm_bo_device
*bdev
)
1445 unsigned i
= TTM_NUM_MEM_TYPES
;
1446 struct ttm_mem_type_manager
*man
;
1447 struct ttm_bo_global
*glob
= bdev
->glob
;
1450 man
= &bdev
->man
[i
];
1451 if (man
->has_type
) {
1452 man
->use_type
= false;
1453 if ((i
!= TTM_PL_SYSTEM
) && ttm_bo_clean_mm(bdev
, i
)) {
1455 printk(KERN_ERR TTM_PFX
1456 "DRM memory manager type %d "
1457 "is not clean.\n", i
);
1459 man
->has_type
= false;
1463 mutex_lock(&glob
->device_list_mutex
);
1464 list_del(&bdev
->device_list
);
1465 mutex_unlock(&glob
->device_list_mutex
);
1467 if (!cancel_delayed_work(&bdev
->wq
))
1468 flush_scheduled_work();
1470 while (ttm_bo_delayed_delete(bdev
, true))
1473 spin_lock(&glob
->lru_lock
);
1474 if (list_empty(&bdev
->ddestroy
))
1475 TTM_DEBUG("Delayed destroy list was clean\n");
1477 if (list_empty(&bdev
->man
[0].lru
))
1478 TTM_DEBUG("Swap list was clean\n");
1479 spin_unlock(&glob
->lru_lock
);
1481 BUG_ON(!drm_mm_clean(&bdev
->addr_space_mm
));
1482 write_lock(&bdev
->vm_lock
);
1483 drm_mm_takedown(&bdev
->addr_space_mm
);
1484 write_unlock(&bdev
->vm_lock
);
1488 EXPORT_SYMBOL(ttm_bo_device_release
);
1490 int ttm_bo_device_init(struct ttm_bo_device
*bdev
,
1491 struct ttm_bo_global
*glob
,
1492 struct ttm_bo_driver
*driver
,
1493 uint64_t file_page_offset
,
1498 rwlock_init(&bdev
->vm_lock
);
1499 bdev
->driver
= driver
;
1501 memset(bdev
->man
, 0, sizeof(bdev
->man
));
1504 * Initialize the system memory buffer type.
1505 * Other types need to be driver / IOCTL initialized.
1507 ret
= ttm_bo_init_mm(bdev
, TTM_PL_SYSTEM
, 0);
1508 if (unlikely(ret
!= 0))
1511 bdev
->addr_space_rb
= RB_ROOT
;
1512 ret
= drm_mm_init(&bdev
->addr_space_mm
, file_page_offset
, 0x10000000);
1513 if (unlikely(ret
!= 0))
1514 goto out_no_addr_mm
;
1516 INIT_DELAYED_WORK(&bdev
->wq
, ttm_bo_delayed_workqueue
);
1517 bdev
->nice_mode
= true;
1518 INIT_LIST_HEAD(&bdev
->ddestroy
);
1519 bdev
->dev_mapping
= NULL
;
1521 bdev
->need_dma32
= need_dma32
;
1523 mutex_lock(&glob
->device_list_mutex
);
1524 list_add_tail(&bdev
->device_list
, &glob
->device_list
);
1525 mutex_unlock(&glob
->device_list_mutex
);
1529 ttm_bo_clean_mm(bdev
, 0);
1533 EXPORT_SYMBOL(ttm_bo_device_init
);
1536 * buffer object vm functions.
1539 bool ttm_mem_reg_is_pci(struct ttm_bo_device
*bdev
, struct ttm_mem_reg
*mem
)
1541 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1543 if (!(man
->flags
& TTM_MEMTYPE_FLAG_FIXED
)) {
1544 if (mem
->mem_type
== TTM_PL_SYSTEM
)
1547 if (man
->flags
& TTM_MEMTYPE_FLAG_CMA
)
1550 if (mem
->placement
& TTM_PL_FLAG_CACHED
)
1556 int ttm_bo_pci_offset(struct ttm_bo_device
*bdev
,
1557 struct ttm_mem_reg
*mem
,
1558 unsigned long *bus_base
,
1559 unsigned long *bus_offset
, unsigned long *bus_size
)
1561 struct ttm_mem_type_manager
*man
= &bdev
->man
[mem
->mem_type
];
1564 if (!(man
->flags
& TTM_MEMTYPE_FLAG_MAPPABLE
))
1567 if (ttm_mem_reg_is_pci(bdev
, mem
)) {
1568 *bus_offset
= mem
->mm_node
->start
<< PAGE_SHIFT
;
1569 *bus_size
= mem
->num_pages
<< PAGE_SHIFT
;
1570 *bus_base
= man
->io_offset
;
1576 void ttm_bo_unmap_virtual(struct ttm_buffer_object
*bo
)
1578 struct ttm_bo_device
*bdev
= bo
->bdev
;
1579 loff_t offset
= (loff_t
) bo
->addr_space_offset
;
1580 loff_t holelen
= ((loff_t
) bo
->mem
.num_pages
) << PAGE_SHIFT
;
1582 if (!bdev
->dev_mapping
)
1585 unmap_mapping_range(bdev
->dev_mapping
, offset
, holelen
, 1);
1587 EXPORT_SYMBOL(ttm_bo_unmap_virtual
);
1589 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object
*bo
)
1591 struct ttm_bo_device
*bdev
= bo
->bdev
;
1592 struct rb_node
**cur
= &bdev
->addr_space_rb
.rb_node
;
1593 struct rb_node
*parent
= NULL
;
1594 struct ttm_buffer_object
*cur_bo
;
1595 unsigned long offset
= bo
->vm_node
->start
;
1596 unsigned long cur_offset
;
1600 cur_bo
= rb_entry(parent
, struct ttm_buffer_object
, vm_rb
);
1601 cur_offset
= cur_bo
->vm_node
->start
;
1602 if (offset
< cur_offset
)
1603 cur
= &parent
->rb_left
;
1604 else if (offset
> cur_offset
)
1605 cur
= &parent
->rb_right
;
1610 rb_link_node(&bo
->vm_rb
, parent
, cur
);
1611 rb_insert_color(&bo
->vm_rb
, &bdev
->addr_space_rb
);
1617 * @bo: the buffer to allocate address space for
1619 * Allocate address space in the drm device so that applications
1620 * can mmap the buffer and access the contents. This only
1621 * applies to ttm_bo_type_device objects as others are not
1622 * placed in the drm device address space.
1625 static int ttm_bo_setup_vm(struct ttm_buffer_object
*bo
)
1627 struct ttm_bo_device
*bdev
= bo
->bdev
;
1631 ret
= drm_mm_pre_get(&bdev
->addr_space_mm
);
1632 if (unlikely(ret
!= 0))
1635 write_lock(&bdev
->vm_lock
);
1636 bo
->vm_node
= drm_mm_search_free(&bdev
->addr_space_mm
,
1637 bo
->mem
.num_pages
, 0, 0);
1639 if (unlikely(bo
->vm_node
== NULL
)) {
1644 bo
->vm_node
= drm_mm_get_block_atomic(bo
->vm_node
,
1645 bo
->mem
.num_pages
, 0);
1647 if (unlikely(bo
->vm_node
== NULL
)) {
1648 write_unlock(&bdev
->vm_lock
);
1652 ttm_bo_vm_insert_rb(bo
);
1653 write_unlock(&bdev
->vm_lock
);
1654 bo
->addr_space_offset
= ((uint64_t) bo
->vm_node
->start
) << PAGE_SHIFT
;
1658 write_unlock(&bdev
->vm_lock
);
1662 int ttm_bo_wait(struct ttm_buffer_object
*bo
,
1663 bool lazy
, bool interruptible
, bool no_wait
)
1665 struct ttm_bo_driver
*driver
= bo
->bdev
->driver
;
1670 if (likely(bo
->sync_obj
== NULL
))
1673 while (bo
->sync_obj
) {
1675 if (driver
->sync_obj_signaled(bo
->sync_obj
, bo
->sync_obj_arg
)) {
1676 void *tmp_obj
= bo
->sync_obj
;
1677 bo
->sync_obj
= NULL
;
1678 clear_bit(TTM_BO_PRIV_FLAG_MOVING
, &bo
->priv_flags
);
1679 spin_unlock(&bo
->lock
);
1680 driver
->sync_obj_unref(&tmp_obj
);
1681 spin_lock(&bo
->lock
);
1688 sync_obj
= driver
->sync_obj_ref(bo
->sync_obj
);
1689 sync_obj_arg
= bo
->sync_obj_arg
;
1690 spin_unlock(&bo
->lock
);
1691 ret
= driver
->sync_obj_wait(sync_obj
, sync_obj_arg
,
1692 lazy
, interruptible
);
1693 if (unlikely(ret
!= 0)) {
1694 driver
->sync_obj_unref(&sync_obj
);
1695 spin_lock(&bo
->lock
);
1698 spin_lock(&bo
->lock
);
1699 if (likely(bo
->sync_obj
== sync_obj
&&
1700 bo
->sync_obj_arg
== sync_obj_arg
)) {
1701 void *tmp_obj
= bo
->sync_obj
;
1702 bo
->sync_obj
= NULL
;
1703 clear_bit(TTM_BO_PRIV_FLAG_MOVING
,
1705 spin_unlock(&bo
->lock
);
1706 driver
->sync_obj_unref(&sync_obj
);
1707 driver
->sync_obj_unref(&tmp_obj
);
1708 spin_lock(&bo
->lock
);
1710 spin_unlock(&bo
->lock
);
1711 driver
->sync_obj_unref(&sync_obj
);
1712 spin_lock(&bo
->lock
);
1717 EXPORT_SYMBOL(ttm_bo_wait
);
1719 void ttm_bo_unblock_reservation(struct ttm_buffer_object
*bo
)
1721 atomic_set(&bo
->reserved
, 0);
1722 wake_up_all(&bo
->event_queue
);
1725 int ttm_bo_block_reservation(struct ttm_buffer_object
*bo
, bool interruptible
,
1730 while (unlikely(atomic_cmpxchg(&bo
->reserved
, 0, 1) != 0)) {
1733 else if (interruptible
) {
1734 ret
= wait_event_interruptible
1735 (bo
->event_queue
, atomic_read(&bo
->reserved
) == 0);
1736 if (unlikely(ret
!= 0))
1739 wait_event(bo
->event_queue
,
1740 atomic_read(&bo
->reserved
) == 0);
1746 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object
*bo
, bool no_wait
)
1751 * Using ttm_bo_reserve instead of ttm_bo_block_reservation
1752 * makes sure the lru lists are updated.
1755 ret
= ttm_bo_reserve(bo
, true, no_wait
, false, 0);
1756 if (unlikely(ret
!= 0))
1758 spin_lock(&bo
->lock
);
1759 ret
= ttm_bo_wait(bo
, false, true, no_wait
);
1760 spin_unlock(&bo
->lock
);
1761 if (likely(ret
== 0))
1762 atomic_inc(&bo
->cpu_writers
);
1763 ttm_bo_unreserve(bo
);
1766 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab
);
1768 void ttm_bo_synccpu_write_release(struct ttm_buffer_object
*bo
)
1770 if (atomic_dec_and_test(&bo
->cpu_writers
))
1771 wake_up_all(&bo
->event_queue
);
1773 EXPORT_SYMBOL(ttm_bo_synccpu_write_release
);
1776 * A buffer object shrink method that tries to swap out the first
1777 * buffer object on the bo_global::swap_lru list.
1780 static int ttm_bo_swapout(struct ttm_mem_shrink
*shrink
)
1782 struct ttm_bo_global
*glob
=
1783 container_of(shrink
, struct ttm_bo_global
, shrink
);
1784 struct ttm_buffer_object
*bo
;
1787 uint32_t swap_placement
= (TTM_PL_FLAG_CACHED
| TTM_PL_FLAG_SYSTEM
);
1789 spin_lock(&glob
->lru_lock
);
1790 while (ret
== -EBUSY
) {
1791 if (unlikely(list_empty(&glob
->swap_lru
))) {
1792 spin_unlock(&glob
->lru_lock
);
1796 bo
= list_first_entry(&glob
->swap_lru
,
1797 struct ttm_buffer_object
, swap
);
1798 kref_get(&bo
->list_kref
);
1801 * Reserve buffer. Since we unlock while sleeping, we need
1802 * to re-check that nobody removed us from the swap-list while
1806 ret
= ttm_bo_reserve_locked(bo
, false, true, false, 0);
1807 if (unlikely(ret
== -EBUSY
)) {
1808 spin_unlock(&glob
->lru_lock
);
1809 ttm_bo_wait_unreserved(bo
, false);
1810 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1811 spin_lock(&glob
->lru_lock
);
1816 put_count
= ttm_bo_del_from_lru(bo
);
1817 spin_unlock(&glob
->lru_lock
);
1820 kref_put(&bo
->list_kref
, ttm_bo_ref_bug
);
1823 * Wait for GPU, then move to system cached.
1826 spin_lock(&bo
->lock
);
1827 ret
= ttm_bo_wait(bo
, false, false, false);
1828 spin_unlock(&bo
->lock
);
1830 if (unlikely(ret
!= 0))
1833 if ((bo
->mem
.placement
& swap_placement
) != swap_placement
) {
1834 struct ttm_mem_reg evict_mem
;
1836 evict_mem
= bo
->mem
;
1837 evict_mem
.mm_node
= NULL
;
1838 evict_mem
.placement
= TTM_PL_FLAG_SYSTEM
| TTM_PL_FLAG_CACHED
;
1839 evict_mem
.mem_type
= TTM_PL_SYSTEM
;
1841 ret
= ttm_bo_handle_move_mem(bo
, &evict_mem
, true,
1843 if (unlikely(ret
!= 0))
1847 ttm_bo_unmap_virtual(bo
);
1850 * Swap out. Buffer will be swapped in again as soon as
1851 * anyone tries to access a ttm page.
1854 if (bo
->bdev
->driver
->swap_notify
)
1855 bo
->bdev
->driver
->swap_notify(bo
);
1857 ret
= ttm_tt_swapout(bo
->ttm
, bo
->persistant_swap_storage
);
1862 * Unreserve without putting on LRU to avoid swapping out an
1863 * already swapped buffer.
1866 atomic_set(&bo
->reserved
, 0);
1867 wake_up_all(&bo
->event_queue
);
1868 kref_put(&bo
->list_kref
, ttm_bo_release_list
);
1872 void ttm_bo_swapout_all(struct ttm_bo_device
*bdev
)
1874 while (ttm_bo_swapout(&bdev
->glob
->shrink
) == 0)
1877 EXPORT_SYMBOL(ttm_bo_swapout_all
);