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dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / gpu / drm / ttm / ttm_bo.c
blob3f56647cdb35f94ddcead862b286516ad903150e
1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 /**************************************************************************
3 *
4 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28 /*
29 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
30 */
31
32 #define pr_fmt(fmt) "[TTM] " fmt
33
34 #include <drm/ttm/ttm_module.h>
35 #include <drm/ttm/ttm_bo_driver.h>
36 #include <drm/ttm/ttm_placement.h>
37 #include <linux/jiffies.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
40 #include <linux/mm.h>
41 #include <linux/file.h>
42 #include <linux/module.h>
43 #include <linux/atomic.h>
44 #include <linux/reservation.h>
45
46 static void ttm_bo_global_kobj_release(struct kobject *kobj);
47
48 /**
49 * ttm_global_mutex - protecting the global BO state
50 */
51 DEFINE_MUTEX(ttm_global_mutex);
52 struct ttm_bo_global ttm_bo_glob = {
53 .use_count = 0
54 };
55
56 static struct attribute ttm_bo_count = {
57 .name = "bo_count",
58 .mode = S_IRUGO
59 };
60
61 /* default destructor */
62 static void ttm_bo_default_destroy(struct ttm_buffer_object *bo)
63 {
64 kfree(bo);
65 }
66
67 static inline int ttm_mem_type_from_place(const struct ttm_place *place,
68 uint32_t *mem_type)
69 {
70 int pos;
71
72 pos = ffs(place->flags & TTM_PL_MASK_MEM);
73 if (unlikely(!pos))
74 return -EINVAL;
75
76 *mem_type = pos - 1;
77 return 0;
78 }
79
80 static void ttm_mem_type_debug(struct ttm_bo_device *bdev, struct drm_printer *p,
81 int mem_type)
82 {
83 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
84
85 drm_printf(p, " has_type: %d\n", man->has_type);
86 drm_printf(p, " use_type: %d\n", man->use_type);
87 drm_printf(p, " flags: 0x%08X\n", man->flags);
88 drm_printf(p, " gpu_offset: 0x%08llX\n", man->gpu_offset);
89 drm_printf(p, " size: %llu\n", man->size);
90 drm_printf(p, " available_caching: 0x%08X\n", man->available_caching);
91 drm_printf(p, " default_caching: 0x%08X\n", man->default_caching);
92 if (mem_type != TTM_PL_SYSTEM)
93 (*man->func->debug)(man, p);
94 }
95
96 static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
97 struct ttm_placement *placement)
98 {
99 struct drm_printer p = drm_debug_printer(TTM_PFX);
100 int i, ret, mem_type;
101
102 drm_printf(&p, "No space for %p (%lu pages, %luK, %luM)\n",
103 bo, bo->mem.num_pages, bo->mem.size >> 10,
104 bo->mem.size >> 20);
105 for (i = 0; i < placement->num_placement; i++) {
106 ret = ttm_mem_type_from_place(&placement->placement[i],
107 &mem_type);
108 if (ret)
109 return;
110 drm_printf(&p, " placement[%d]=0x%08X (%d)\n",
111 i, placement->placement[i].flags, mem_type);
112 ttm_mem_type_debug(bo->bdev, &p, mem_type);
113 }
114 }
115
116 static ssize_t ttm_bo_global_show(struct kobject *kobj,
117 struct attribute *attr,
118 char *buffer)
119 {
120 struct ttm_bo_global *glob =
121 container_of(kobj, struct ttm_bo_global, kobj);
122
123 return snprintf(buffer, PAGE_SIZE, "%d\n",
124 atomic_read(&glob->bo_count));
125 }
126
127 static struct attribute *ttm_bo_global_attrs[] = {
128 &ttm_bo_count,
129 NULL
130 };
131
132 static const struct sysfs_ops ttm_bo_global_ops = {
133 .show = &ttm_bo_global_show
134 };
135
136 static struct kobj_type ttm_bo_glob_kobj_type = {
137 .release = &ttm_bo_global_kobj_release,
138 .sysfs_ops = &ttm_bo_global_ops,
139 .default_attrs = ttm_bo_global_attrs
140 };
141
142
143 static inline uint32_t ttm_bo_type_flags(unsigned type)
144 {
145 return 1 << (type);
146 }
147
148 static void ttm_bo_release_list(struct kref *list_kref)
149 {
150 struct ttm_buffer_object *bo =
151 container_of(list_kref, struct ttm_buffer_object, list_kref);
152 struct ttm_bo_device *bdev = bo->bdev;
153 size_t acc_size = bo->acc_size;
154
155 BUG_ON(kref_read(&bo->list_kref));
156 BUG_ON(kref_read(&bo->kref));
157 BUG_ON(atomic_read(&bo->cpu_writers));
158 BUG_ON(bo->mem.mm_node != NULL);
159 BUG_ON(!list_empty(&bo->lru));
160 BUG_ON(!list_empty(&bo->ddestroy));
161 ttm_tt_destroy(bo->ttm);
162 atomic_dec(&bo->bdev->glob->bo_count);
163 dma_fence_put(bo->moving);
164 reservation_object_fini(&bo->ttm_resv);
165 mutex_destroy(&bo->wu_mutex);
166 bo->destroy(bo);
167 ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
168 }
169
170 void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
171 {
172 struct ttm_bo_device *bdev = bo->bdev;
173 struct ttm_mem_type_manager *man;
174
175 reservation_object_assert_held(bo->resv);
176
177 if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
178 BUG_ON(!list_empty(&bo->lru));
179
180 man = &bdev->man[bo->mem.mem_type];
181 list_add_tail(&bo->lru, &man->lru[bo->priority]);
182 kref_get(&bo->list_kref);
183
184 if (bo->ttm && !(bo->ttm->page_flags &
185 (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) {
186 list_add_tail(&bo->swap,
187 &bdev->glob->swap_lru[bo->priority]);
188 kref_get(&bo->list_kref);
189 }
190 }
191 }
192 EXPORT_SYMBOL(ttm_bo_add_to_lru);
193
194 static void ttm_bo_ref_bug(struct kref *list_kref)
195 {
196 BUG();
197 }
198
199 void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
200 {
201 struct ttm_bo_device *bdev = bo->bdev;
202 bool notify = false;
203
204 if (!list_empty(&bo->swap)) {
205 list_del_init(&bo->swap);
206 kref_put(&bo->list_kref, ttm_bo_ref_bug);
207 notify = true;
208 }
209 if (!list_empty(&bo->lru)) {
210 list_del_init(&bo->lru);
211 kref_put(&bo->list_kref, ttm_bo_ref_bug);
212 notify = true;
213 }
214
215 if (notify && bdev->driver->del_from_lru_notify)
216 bdev->driver->del_from_lru_notify(bo);
217 }
218
219 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
220 {
221 struct ttm_bo_global *glob = bo->bdev->glob;
222
223 spin_lock(&glob->lru_lock);
224 ttm_bo_del_from_lru(bo);
225 spin_unlock(&glob->lru_lock);
226 }
227 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
228
229 static void ttm_bo_bulk_move_set_pos(struct ttm_lru_bulk_move_pos *pos,
230 struct ttm_buffer_object *bo)
231 {
232 if (!pos->first)
233 pos->first = bo;
234 pos->last = bo;
235 }
236
237 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
238 struct ttm_lru_bulk_move *bulk)
239 {
240 reservation_object_assert_held(bo->resv);
241
242 ttm_bo_del_from_lru(bo);
243 ttm_bo_add_to_lru(bo);
244
245 if (bulk && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
246 switch (bo->mem.mem_type) {
247 case TTM_PL_TT:
248 ttm_bo_bulk_move_set_pos(&bulk->tt[bo->priority], bo);
249 break;
250
251 case TTM_PL_VRAM:
252 ttm_bo_bulk_move_set_pos(&bulk->vram[bo->priority], bo);
253 break;
254 }
255 if (bo->ttm && !(bo->ttm->page_flags &
256 (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED)))
257 ttm_bo_bulk_move_set_pos(&bulk->swap[bo->priority], bo);
258 }
259 }
260 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
261
262 void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
263 {
264 unsigned i;
265
266 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
267 struct ttm_lru_bulk_move_pos *pos = &bulk->tt[i];
268 struct ttm_mem_type_manager *man;
269
270 if (!pos->first)
271 continue;
272
273 reservation_object_assert_held(pos->first->resv);
274 reservation_object_assert_held(pos->last->resv);
275
276 man = &pos->first->bdev->man[TTM_PL_TT];
277 list_bulk_move_tail(&man->lru[i], &pos->first->lru,
278 &pos->last->lru);
279 }
280
281 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
282 struct ttm_lru_bulk_move_pos *pos = &bulk->vram[i];
283 struct ttm_mem_type_manager *man;
284
285 if (!pos->first)
286 continue;
287
288 reservation_object_assert_held(pos->first->resv);
289 reservation_object_assert_held(pos->last->resv);
290
291 man = &pos->first->bdev->man[TTM_PL_VRAM];
292 list_bulk_move_tail(&man->lru[i], &pos->first->lru,
293 &pos->last->lru);
294 }
295
296 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
297 struct ttm_lru_bulk_move_pos *pos = &bulk->swap[i];
298 struct list_head *lru;
299
300 if (!pos->first)
301 continue;
302
303 reservation_object_assert_held(pos->first->resv);
304 reservation_object_assert_held(pos->last->resv);
305
306 lru = &pos->first->bdev->glob->swap_lru[i];
307 list_bulk_move_tail(lru, &pos->first->swap, &pos->last->swap);
308 }
309 }
310 EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail);
311
312 static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
313 struct ttm_mem_reg *mem, bool evict,
314 struct ttm_operation_ctx *ctx)
315 {
316 struct ttm_bo_device *bdev = bo->bdev;
317 bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
318 bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
319 struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
320 struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
321 int ret = 0;
322
323 if (old_is_pci || new_is_pci ||
324 ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
325 ret = ttm_mem_io_lock(old_man, true);
326 if (unlikely(ret != 0))
327 goto out_err;
328 ttm_bo_unmap_virtual_locked(bo);
329 ttm_mem_io_unlock(old_man);
330 }
331
332 /*
333 * Create and bind a ttm if required.
334 */
335
336 if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
337 if (bo->ttm == NULL) {
338 bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
339 ret = ttm_tt_create(bo, zero);
340 if (ret)
341 goto out_err;
342 }
343
344 ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
345 if (ret)
346 goto out_err;
347
348 if (mem->mem_type != TTM_PL_SYSTEM) {
349 ret = ttm_tt_bind(bo->ttm, mem, ctx);
350 if (ret)
351 goto out_err;
352 }
353
354 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
355 if (bdev->driver->move_notify)
356 bdev->driver->move_notify(bo, evict, mem);
357 bo->mem = *mem;
358 mem->mm_node = NULL;
359 goto moved;
360 }
361 }
362
363 if (bdev->driver->move_notify)
364 bdev->driver->move_notify(bo, evict, mem);
365
366 if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
367 !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
368 ret = ttm_bo_move_ttm(bo, ctx, mem);
369 else if (bdev->driver->move)
370 ret = bdev->driver->move(bo, evict, ctx, mem);
371 else
372 ret = ttm_bo_move_memcpy(bo, ctx, mem);
373
374 if (ret) {
375 if (bdev->driver->move_notify) {
376 swap(*mem, bo->mem);
377 bdev->driver->move_notify(bo, false, mem);
378 swap(*mem, bo->mem);
379 }
380
381 goto out_err;
382 }
383
384 moved:
385 if (bo->evicted) {
386 if (bdev->driver->invalidate_caches) {
387 ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
388 if (ret)
389 pr_err("Can not flush read caches\n");
390 }
391 bo->evicted = false;
392 }
393
394 if (bo->mem.mm_node)
395 bo->offset = (bo->mem.start << PAGE_SHIFT) +
396 bdev->man[bo->mem.mem_type].gpu_offset;
397 else
398 bo->offset = 0;
399
400 ctx->bytes_moved += bo->num_pages << PAGE_SHIFT;
401 return 0;
402
403 out_err:
404 new_man = &bdev->man[bo->mem.mem_type];
405 if (new_man->flags & TTM_MEMTYPE_FLAG_FIXED) {
406 ttm_tt_destroy(bo->ttm);
407 bo->ttm = NULL;
408 }
409
410 return ret;
411 }
412
413 /**
414 * Call bo::reserved.
415 * Will release GPU memory type usage on destruction.
416 * This is the place to put in driver specific hooks to release
417 * driver private resources.
418 * Will release the bo::reserved lock.
419 */
420
421 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
422 {
423 if (bo->bdev->driver->move_notify)
424 bo->bdev->driver->move_notify(bo, false, NULL);
425
426 ttm_tt_destroy(bo->ttm);
427 bo->ttm = NULL;
428 ttm_bo_mem_put(bo, &bo->mem);
429 }
430
431 static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo)
432 {
433 int r;
434
435 if (bo->resv == &bo->ttm_resv)
436 return 0;
437
438 BUG_ON(!reservation_object_trylock(&bo->ttm_resv));
439
440 r = reservation_object_copy_fences(&bo->ttm_resv, bo->resv);
441 if (r)
442 reservation_object_unlock(&bo->ttm_resv);
443
444 return r;
445 }
446
447 static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
448 {
449 struct reservation_object_list *fobj;
450 struct dma_fence *fence;
451 int i;
452
453 fobj = reservation_object_get_list(&bo->ttm_resv);
454 fence = reservation_object_get_excl(&bo->ttm_resv);
455 if (fence && !fence->ops->signaled)
456 dma_fence_enable_sw_signaling(fence);
457
458 for (i = 0; fobj && i < fobj->shared_count; ++i) {
459 fence = rcu_dereference_protected(fobj->shared[i],
460 reservation_object_held(bo->resv));
461
462 if (!fence->ops->signaled)
463 dma_fence_enable_sw_signaling(fence);
464 }
465 }
466
467 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
468 {
469 struct ttm_bo_device *bdev = bo->bdev;
470 struct ttm_bo_global *glob = bdev->glob;
471 int ret;
472
473 ret = ttm_bo_individualize_resv(bo);
474 if (ret) {
475 /* Last resort, if we fail to allocate memory for the
476 * fences block for the BO to become idle
477 */
478 reservation_object_wait_timeout_rcu(bo->resv, true, false,
479 30 * HZ);
480 spin_lock(&glob->lru_lock);
481 goto error;
482 }
483
484 spin_lock(&glob->lru_lock);
485 ret = reservation_object_trylock(bo->resv) ? 0 : -EBUSY;
486 if (!ret) {
487 if (reservation_object_test_signaled_rcu(&bo->ttm_resv, true)) {
488 ttm_bo_del_from_lru(bo);
489 spin_unlock(&glob->lru_lock);
490 if (bo->resv != &bo->ttm_resv)
491 reservation_object_unlock(&bo->ttm_resv);
492
493 ttm_bo_cleanup_memtype_use(bo);
494 reservation_object_unlock(bo->resv);
495 return;
496 }
497
498 ttm_bo_flush_all_fences(bo);
499
500 /*
501 * Make NO_EVICT bos immediately available to
502 * shrinkers, now that they are queued for
503 * destruction.
504 */
505 if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
506 bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT;
507 ttm_bo_add_to_lru(bo);
508 }
509
510 reservation_object_unlock(bo->resv);
511 }
512 if (bo->resv != &bo->ttm_resv)
513 reservation_object_unlock(&bo->ttm_resv);
514
515 error:
516 kref_get(&bo->list_kref);
517 list_add_tail(&bo->ddestroy, &bdev->ddestroy);
518 spin_unlock(&glob->lru_lock);
519
520 schedule_delayed_work(&bdev->wq,
521 ((HZ / 100) < 1) ? 1 : HZ / 100);
522 }
523
524 /**
525 * function ttm_bo_cleanup_refs
526 * If bo idle, remove from delayed- and lru lists, and unref.
527 * If not idle, do nothing.
528 *
529 * Must be called with lru_lock and reservation held, this function
530 * will drop the lru lock and optionally the reservation lock before returning.
531 *
532 * @interruptible Any sleeps should occur interruptibly.
533 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
534 * @unlock_resv Unlock the reservation lock as well.
535 */
536
537 static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
538 bool interruptible, bool no_wait_gpu,
539 bool unlock_resv)
540 {
541 struct ttm_bo_global *glob = bo->bdev->glob;
542 struct reservation_object *resv;
543 int ret;
544
545 if (unlikely(list_empty(&bo->ddestroy)))
546 resv = bo->resv;
547 else
548 resv = &bo->ttm_resv;
549
550 if (reservation_object_test_signaled_rcu(resv, true))
551 ret = 0;
552 else
553 ret = -EBUSY;
554
555 if (ret && !no_wait_gpu) {
556 long lret;
557
558 if (unlock_resv)
559 reservation_object_unlock(bo->resv);
560 spin_unlock(&glob->lru_lock);
561
562 lret = reservation_object_wait_timeout_rcu(resv, true,
563 interruptible,
564 30 * HZ);
565
566 if (lret < 0)
567 return lret;
568 else if (lret == 0)
569 return -EBUSY;
570
571 spin_lock(&glob->lru_lock);
572 if (unlock_resv && !reservation_object_trylock(bo->resv)) {
573 /*
574 * We raced, and lost, someone else holds the reservation now,
575 * and is probably busy in ttm_bo_cleanup_memtype_use.
576 *
577 * Even if it's not the case, because we finished waiting any
578 * delayed destruction would succeed, so just return success
579 * here.
580 */
581 spin_unlock(&glob->lru_lock);
582 return 0;
583 }
584 ret = 0;
585 }
586
587 if (ret || unlikely(list_empty(&bo->ddestroy))) {
588 if (unlock_resv)
589 reservation_object_unlock(bo->resv);
590 spin_unlock(&glob->lru_lock);
591 return ret;
592 }
593
594 ttm_bo_del_from_lru(bo);
595 list_del_init(&bo->ddestroy);
596 kref_put(&bo->list_kref, ttm_bo_ref_bug);
597
598 spin_unlock(&glob->lru_lock);
599 ttm_bo_cleanup_memtype_use(bo);
600
601 if (unlock_resv)
602 reservation_object_unlock(bo->resv);
603
604 return 0;
605 }
606
607 /**
608 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
609 * encountered buffers.
610 */
611 static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
612 {
613 struct ttm_bo_global *glob = bdev->glob;
614 struct list_head removed;
615 bool empty;
616
617 INIT_LIST_HEAD(&removed);
618
619 spin_lock(&glob->lru_lock);
620 while (!list_empty(&bdev->ddestroy)) {
621 struct ttm_buffer_object *bo;
622
623 bo = list_first_entry(&bdev->ddestroy, struct ttm_buffer_object,
624 ddestroy);
625 kref_get(&bo->list_kref);
626 list_move_tail(&bo->ddestroy, &removed);
627
628 if (remove_all || bo->resv != &bo->ttm_resv) {
629 spin_unlock(&glob->lru_lock);
630 reservation_object_lock(bo->resv, NULL);
631
632 spin_lock(&glob->lru_lock);
633 ttm_bo_cleanup_refs(bo, false, !remove_all, true);
634
635 } else if (reservation_object_trylock(bo->resv)) {
636 ttm_bo_cleanup_refs(bo, false, !remove_all, true);
637 } else {
638 spin_unlock(&glob->lru_lock);
639 }
640
641 kref_put(&bo->list_kref, ttm_bo_release_list);
642 spin_lock(&glob->lru_lock);
643 }
644 list_splice_tail(&removed, &bdev->ddestroy);
645 empty = list_empty(&bdev->ddestroy);
646 spin_unlock(&glob->lru_lock);
647
648 return empty;
649 }
650
651 static void ttm_bo_delayed_workqueue(struct work_struct *work)
652 {
653 struct ttm_bo_device *bdev =
654 container_of(work, struct ttm_bo_device, wq.work);
655
656 if (!ttm_bo_delayed_delete(bdev, false))
657 schedule_delayed_work(&bdev->wq,
658 ((HZ / 100) < 1) ? 1 : HZ / 100);
659 }
660
661 static void ttm_bo_release(struct kref *kref)
662 {
663 struct ttm_buffer_object *bo =
664 container_of(kref, struct ttm_buffer_object, kref);
665 struct ttm_bo_device *bdev = bo->bdev;
666 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
667
668 drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
669 ttm_mem_io_lock(man, false);
670 ttm_mem_io_free_vm(bo);
671 ttm_mem_io_unlock(man);
672 ttm_bo_cleanup_refs_or_queue(bo);
673 kref_put(&bo->list_kref, ttm_bo_release_list);
674 }
675
676 void ttm_bo_put(struct ttm_buffer_object *bo)
677 {
678 kref_put(&bo->kref, ttm_bo_release);
679 }
680 EXPORT_SYMBOL(ttm_bo_put);
681
682 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
683 {
684 return cancel_delayed_work_sync(&bdev->wq);
685 }
686 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
687
688 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
689 {
690 if (resched)
691 schedule_delayed_work(&bdev->wq,
692 ((HZ / 100) < 1) ? 1 : HZ / 100);
693 }
694 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
695
696 static int ttm_bo_evict(struct ttm_buffer_object *bo,
697 struct ttm_operation_ctx *ctx)
698 {
699 struct ttm_bo_device *bdev = bo->bdev;
700 struct ttm_mem_reg evict_mem;
701 struct ttm_placement placement;
702 int ret = 0;
703
704 reservation_object_assert_held(bo->resv);
705
706 placement.num_placement = 0;
707 placement.num_busy_placement = 0;
708 bdev->driver->evict_flags(bo, &placement);
709
710 if (!placement.num_placement && !placement.num_busy_placement) {
711 ret = ttm_bo_pipeline_gutting(bo);
712 if (ret)
713 return ret;
714
715 return ttm_tt_create(bo, false);
716 }
717
718 evict_mem = bo->mem;
719 evict_mem.mm_node = NULL;
720 evict_mem.bus.io_reserved_vm = false;
721 evict_mem.bus.io_reserved_count = 0;
722
723 ret = ttm_bo_mem_space(bo, &placement, &evict_mem, ctx);
724 if (ret) {
725 if (ret != -ERESTARTSYS) {
726 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
727 bo);
728 ttm_bo_mem_space_debug(bo, &placement);
729 }
730 goto out;
731 }
732
733 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, ctx);
734 if (unlikely(ret)) {
735 if (ret != -ERESTARTSYS)
736 pr_err("Buffer eviction failed\n");
737 ttm_bo_mem_put(bo, &evict_mem);
738 goto out;
739 }
740 bo->evicted = true;
741 out:
742 return ret;
743 }
744
745 bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
746 const struct ttm_place *place)
747 {
748 /* Don't evict this BO if it's outside of the
749 * requested placement range
750 */
751 if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
752 (place->lpfn && place->lpfn <= bo->mem.start))
753 return false;
754
755 return true;
756 }
757 EXPORT_SYMBOL(ttm_bo_eviction_valuable);
758
759 /**
760 * Check the target bo is allowable to be evicted or swapout, including cases:
761 *
762 * a. if share same reservation object with ctx->resv, have assumption
763 * reservation objects should already be locked, so not lock again and
764 * return true directly when either the opreation allow_reserved_eviction
765 * or the target bo already is in delayed free list;
766 *
767 * b. Otherwise, trylock it.
768 */
769 static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
770 struct ttm_operation_ctx *ctx, bool *locked)
771 {
772 bool ret = false;
773
774 *locked = false;
775 if (bo->resv == ctx->resv) {
776 reservation_object_assert_held(bo->resv);
777 if (ctx->flags & TTM_OPT_FLAG_ALLOW_RES_EVICT
778 || !list_empty(&bo->ddestroy))
779 ret = true;
780 } else {
781 *locked = reservation_object_trylock(bo->resv);
782 ret = *locked;
783 }
784
785 return ret;
786 }
787
788 static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
789 uint32_t mem_type,
790 const struct ttm_place *place,
791 struct ttm_operation_ctx *ctx)
792 {
793 struct ttm_bo_global *glob = bdev->glob;
794 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
795 struct ttm_buffer_object *bo = NULL;
796 bool locked = false;
797 unsigned i;
798 int ret;
799
800 spin_lock(&glob->lru_lock);
801 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
802 list_for_each_entry(bo, &man->lru[i], lru) {
803 if (!ttm_bo_evict_swapout_allowable(bo, ctx, &locked))
804 continue;
805
806 if (place && !bdev->driver->eviction_valuable(bo,
807 place)) {
808 if (locked)
809 reservation_object_unlock(bo->resv);
810 continue;
811 }
812 break;
813 }
814
815 /* If the inner loop terminated early, we have our candidate */
816 if (&bo->lru != &man->lru[i])
817 break;
818
819 bo = NULL;
820 }
821
822 if (!bo) {
823 spin_unlock(&glob->lru_lock);
824 return -EBUSY;
825 }
826
827 kref_get(&bo->list_kref);
828
829 if (!list_empty(&bo->ddestroy)) {
830 ret = ttm_bo_cleanup_refs(bo, ctx->interruptible,
831 ctx->no_wait_gpu, locked);
832 kref_put(&bo->list_kref, ttm_bo_release_list);
833 return ret;
834 }
835
836 ttm_bo_del_from_lru(bo);
837 spin_unlock(&glob->lru_lock);
838
839 ret = ttm_bo_evict(bo, ctx);
840 if (locked) {
841 ttm_bo_unreserve(bo);
842 } else {
843 spin_lock(&glob->lru_lock);
844 ttm_bo_add_to_lru(bo);
845 spin_unlock(&glob->lru_lock);
846 }
847
848 kref_put(&bo->list_kref, ttm_bo_release_list);
849 return ret;
850 }
851
852 void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
853 {
854 struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
855
856 if (mem->mm_node)
857 (*man->func->put_node)(man, mem);
858 }
859 EXPORT_SYMBOL(ttm_bo_mem_put);
860
861 /**
862 * Add the last move fence to the BO and reserve a new shared slot.
863 */
864 static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
865 struct ttm_mem_type_manager *man,
866 struct ttm_mem_reg *mem)
867 {
868 struct dma_fence *fence;
869 int ret;
870
871 spin_lock(&man->move_lock);
872 fence = dma_fence_get(man->move);
873 spin_unlock(&man->move_lock);
874
875 if (fence) {
876 reservation_object_add_shared_fence(bo->resv, fence);
877
878 ret = reservation_object_reserve_shared(bo->resv, 1);
879 if (unlikely(ret))
880 return ret;
881
882 dma_fence_put(bo->moving);
883 bo->moving = fence;
884 }
885
886 return 0;
887 }
888
889 /**
890 * Repeatedly evict memory from the LRU for @mem_type until we create enough
891 * space, or we've evicted everything and there isn't enough space.
892 */
893 static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
894 uint32_t mem_type,
895 const struct ttm_place *place,
896 struct ttm_mem_reg *mem,
897 struct ttm_operation_ctx *ctx)
898 {
899 struct ttm_bo_device *bdev = bo->bdev;
900 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
901 int ret;
902
903 do {
904 ret = (*man->func->get_node)(man, bo, place, mem);
905 if (unlikely(ret != 0))
906 return ret;
907 if (mem->mm_node)
908 break;
909 ret = ttm_mem_evict_first(bdev, mem_type, place, ctx);
910 if (unlikely(ret != 0))
911 return ret;
912 } while (1);
913 mem->mem_type = mem_type;
914 return ttm_bo_add_move_fence(bo, man, mem);
915 }
916
917 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
918 uint32_t cur_placement,
919 uint32_t proposed_placement)
920 {
921 uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
922 uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
923
924 /**
925 * Keep current caching if possible.
926 */
927
928 if ((cur_placement & caching) != 0)
929 result |= (cur_placement & caching);
930 else if ((man->default_caching & caching) != 0)
931 result |= man->default_caching;
932 else if ((TTM_PL_FLAG_CACHED & caching) != 0)
933 result |= TTM_PL_FLAG_CACHED;
934 else if ((TTM_PL_FLAG_WC & caching) != 0)
935 result |= TTM_PL_FLAG_WC;
936 else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
937 result |= TTM_PL_FLAG_UNCACHED;
938
939 return result;
940 }
941
942 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
943 uint32_t mem_type,
944 const struct ttm_place *place,
945 uint32_t *masked_placement)
946 {
947 uint32_t cur_flags = ttm_bo_type_flags(mem_type);
948
949 if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0)
950 return false;
951
952 if ((place->flags & man->available_caching) == 0)
953 return false;
954
955 cur_flags |= (place->flags & man->available_caching);
956
957 *masked_placement = cur_flags;
958 return true;
959 }
960
961 /**
962 * Creates space for memory region @mem according to its type.
963 *
964 * This function first searches for free space in compatible memory types in
965 * the priority order defined by the driver. If free space isn't found, then
966 * ttm_bo_mem_force_space is attempted in priority order to evict and find
967 * space.
968 */
969 int ttm_bo_mem_space(struct ttm_buffer_object *bo,
970 struct ttm_placement *placement,
971 struct ttm_mem_reg *mem,
972 struct ttm_operation_ctx *ctx)
973 {
974 struct ttm_bo_device *bdev = bo->bdev;
975 struct ttm_mem_type_manager *man;
976 uint32_t mem_type = TTM_PL_SYSTEM;
977 uint32_t cur_flags = 0;
978 bool type_found = false;
979 bool type_ok = false;
980 bool has_erestartsys = false;
981 int i, ret;
982
983 ret = reservation_object_reserve_shared(bo->resv, 1);
984 if (unlikely(ret))
985 return ret;
986
987 mem->mm_node = NULL;
988 for (i = 0; i < placement->num_placement; ++i) {
989 const struct ttm_place *place = &placement->placement[i];
990
991 ret = ttm_mem_type_from_place(place, &mem_type);
992 if (ret)
993 return ret;
994 man = &bdev->man[mem_type];
995 if (!man->has_type || !man->use_type)
996 continue;
997
998 type_ok = ttm_bo_mt_compatible(man, mem_type, place,
999 &cur_flags);
1000
1001 if (!type_ok)
1002 continue;
1003
1004 type_found = true;
1005 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
1006 cur_flags);
1007 /*
1008 * Use the access and other non-mapping-related flag bits from
1009 * the memory placement flags to the current flags
1010 */
1011 ttm_flag_masked(&cur_flags, place->flags,
1012 ~TTM_PL_MASK_MEMTYPE);
1013
1014 if (mem_type == TTM_PL_SYSTEM)
1015 break;
1016
1017 ret = (*man->func->get_node)(man, bo, place, mem);
1018 if (unlikely(ret))
1019 return ret;
1020
1021 if (mem->mm_node) {
1022 ret = ttm_bo_add_move_fence(bo, man, mem);
1023 if (unlikely(ret)) {
1024 (*man->func->put_node)(man, mem);
1025 return ret;
1026 }
1027 break;
1028 }
1029 }
1030
1031 if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
1032 mem->mem_type = mem_type;
1033 mem->placement = cur_flags;
1034 return 0;
1035 }
1036
1037 for (i = 0; i < placement->num_busy_placement; ++i) {
1038 const struct ttm_place *place = &placement->busy_placement[i];
1039
1040 ret = ttm_mem_type_from_place(place, &mem_type);
1041 if (ret)
1042 return ret;
1043 man = &bdev->man[mem_type];
1044 if (!man->has_type || !man->use_type)
1045 continue;
1046 if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
1047 continue;
1048
1049 type_found = true;
1050 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
1051 cur_flags);
1052 /*
1053 * Use the access and other non-mapping-related flag bits from
1054 * the memory placement flags to the current flags
1055 */
1056 ttm_flag_masked(&cur_flags, place->flags,
1057 ~TTM_PL_MASK_MEMTYPE);
1058
1059 if (mem_type == TTM_PL_SYSTEM) {
1060 mem->mem_type = mem_type;
1061 mem->placement = cur_flags;
1062 mem->mm_node = NULL;
1063 return 0;
1064 }
1065
1066 ret = ttm_bo_mem_force_space(bo, mem_type, place, mem, ctx);
1067 if (ret == 0 && mem->mm_node) {
1068 mem->placement = cur_flags;
1069 return 0;
1070 }
1071 if (ret == -ERESTARTSYS)
1072 has_erestartsys = true;
1073 }
1074
1075 if (!type_found) {
1076 pr_err(TTM_PFX "No compatible memory type found\n");
1077 return -EINVAL;
1078 }
1079
1080 return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
1081 }
1082 EXPORT_SYMBOL(ttm_bo_mem_space);
1083
1084 static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
1085 struct ttm_placement *placement,
1086 struct ttm_operation_ctx *ctx)
1087 {
1088 int ret = 0;
1089 struct ttm_mem_reg mem;
1090
1091 reservation_object_assert_held(bo->resv);
1092
1093 mem.num_pages = bo->num_pages;
1094 mem.size = mem.num_pages << PAGE_SHIFT;
1095 mem.page_alignment = bo->mem.page_alignment;
1096 mem.bus.io_reserved_vm = false;
1097 mem.bus.io_reserved_count = 0;
1098 /*
1099 * Determine where to move the buffer.
1100 */
1101 ret = ttm_bo_mem_space(bo, placement, &mem, ctx);
1102 if (ret)
1103 goto out_unlock;
1104 ret = ttm_bo_handle_move_mem(bo, &mem, false, ctx);
1105 out_unlock:
1106 if (ret && mem.mm_node)
1107 ttm_bo_mem_put(bo, &mem);
1108 return ret;
1109 }
1110
1111 static bool ttm_bo_places_compat(const struct ttm_place *places,
1112 unsigned num_placement,
1113 struct ttm_mem_reg *mem,
1114 uint32_t *new_flags)
1115 {
1116 unsigned i;
1117
1118 for (i = 0; i < num_placement; i++) {
1119 const struct ttm_place *heap = &places[i];
1120
1121 if (mem->mm_node && (mem->start < heap->fpfn ||
1122 (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
1123 continue;
1124
1125 *new_flags = heap->flags;
1126 if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
1127 (*new_flags & mem->placement & TTM_PL_MASK_MEM) &&
1128 (!(*new_flags & TTM_PL_FLAG_CONTIGUOUS) ||
1129 (mem->placement & TTM_PL_FLAG_CONTIGUOUS)))
1130 return true;
1131 }
1132 return false;
1133 }
1134
1135 bool ttm_bo_mem_compat(struct ttm_placement *placement,
1136 struct ttm_mem_reg *mem,
1137 uint32_t *new_flags)
1138 {
1139 if (ttm_bo_places_compat(placement->placement, placement->num_placement,
1140 mem, new_flags))
1141 return true;
1142
1143 if ((placement->busy_placement != placement->placement ||
1144 placement->num_busy_placement > placement->num_placement) &&
1145 ttm_bo_places_compat(placement->busy_placement,
1146 placement->num_busy_placement,
1147 mem, new_flags))
1148 return true;
1149
1150 return false;
1151 }
1152 EXPORT_SYMBOL(ttm_bo_mem_compat);
1153
1154 int ttm_bo_validate(struct ttm_buffer_object *bo,
1155 struct ttm_placement *placement,
1156 struct ttm_operation_ctx *ctx)
1157 {
1158 int ret;
1159 uint32_t new_flags;
1160
1161 reservation_object_assert_held(bo->resv);
1162 /*
1163 * Check whether we need to move buffer.
1164 */
1165 if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
1166 ret = ttm_bo_move_buffer(bo, placement, ctx);
1167 if (ret)
1168 return ret;
1169 } else {
1170 /*
1171 * Use the access and other non-mapping-related flag bits from
1172 * the compatible memory placement flags to the active flags
1173 */
1174 ttm_flag_masked(&bo->mem.placement, new_flags,
1175 ~TTM_PL_MASK_MEMTYPE);
1176 }
1177 /*
1178 * We might need to add a TTM.
1179 */
1180 if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1181 ret = ttm_tt_create(bo, true);
1182 if (ret)
1183 return ret;
1184 }
1185 return 0;
1186 }
1187 EXPORT_SYMBOL(ttm_bo_validate);
1188
1189 int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
1190 struct ttm_buffer_object *bo,
1191 unsigned long size,
1192 enum ttm_bo_type type,
1193 struct ttm_placement *placement,
1194 uint32_t page_alignment,
1195 struct ttm_operation_ctx *ctx,
1196 size_t acc_size,
1197 struct sg_table *sg,
1198 struct reservation_object *resv,
1199 void (*destroy) (struct ttm_buffer_object *))
1200 {
1201 int ret = 0;
1202 unsigned long num_pages;
1203 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1204 bool locked;
1205
1206 ret = ttm_mem_global_alloc(mem_glob, acc_size, ctx);
1207 if (ret) {
1208 pr_err("Out of kernel memory\n");
1209 if (destroy)
1210 (*destroy)(bo);
1211 else
1212 kfree(bo);
1213 return -ENOMEM;
1214 }
1215
1216 num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1217 if (num_pages == 0) {
1218 pr_err("Illegal buffer object size\n");
1219 if (destroy)
1220 (*destroy)(bo);
1221 else
1222 kfree(bo);
1223 ttm_mem_global_free(mem_glob, acc_size);
1224 return -EINVAL;
1225 }
1226 bo->destroy = destroy ? destroy : ttm_bo_default_destroy;
1227
1228 kref_init(&bo->kref);
1229 kref_init(&bo->list_kref);
1230 atomic_set(&bo->cpu_writers, 0);
1231 INIT_LIST_HEAD(&bo->lru);
1232 INIT_LIST_HEAD(&bo->ddestroy);
1233 INIT_LIST_HEAD(&bo->swap);
1234 INIT_LIST_HEAD(&bo->io_reserve_lru);
1235 mutex_init(&bo->wu_mutex);
1236 bo->bdev = bdev;
1237 bo->type = type;
1238 bo->num_pages = num_pages;
1239 bo->mem.size = num_pages << PAGE_SHIFT;
1240 bo->mem.mem_type = TTM_PL_SYSTEM;
1241 bo->mem.num_pages = bo->num_pages;
1242 bo->mem.mm_node = NULL;
1243 bo->mem.page_alignment = page_alignment;
1244 bo->mem.bus.io_reserved_vm = false;
1245 bo->mem.bus.io_reserved_count = 0;
1246 bo->moving = NULL;
1247 bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1248 bo->acc_size = acc_size;
1249 bo->sg = sg;
1250 if (resv) {
1251 bo->resv = resv;
1252 reservation_object_assert_held(bo->resv);
1253 } else {
1254 bo->resv = &bo->ttm_resv;
1255 }
1256 reservation_object_init(&bo->ttm_resv);
1257 atomic_inc(&bo->bdev->glob->bo_count);
1258 drm_vma_node_reset(&bo->vma_node);
1259
1260 /*
1261 * For ttm_bo_type_device buffers, allocate
1262 * address space from the device.
1263 */
1264 if (bo->type == ttm_bo_type_device ||
1265 bo->type == ttm_bo_type_sg)
1266 ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
1267 bo->mem.num_pages);
1268
1269 /* passed reservation objects should already be locked,
1270 * since otherwise lockdep will be angered in radeon.
1271 */
1272 if (!resv) {
1273 locked = reservation_object_trylock(bo->resv);
1274 WARN_ON(!locked);
1275 }
1276
1277 if (likely(!ret))
1278 ret = ttm_bo_validate(bo, placement, ctx);
1279
1280 if (unlikely(ret)) {
1281 if (!resv)
1282 ttm_bo_unreserve(bo);
1283
1284 ttm_bo_put(bo);
1285 return ret;
1286 }
1287
1288 if (resv && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
1289 spin_lock(&bdev->glob->lru_lock);
1290 ttm_bo_add_to_lru(bo);
1291 spin_unlock(&bdev->glob->lru_lock);
1292 }
1293
1294 return ret;
1295 }
1296 EXPORT_SYMBOL(ttm_bo_init_reserved);
1297
1298 int ttm_bo_init(struct ttm_bo_device *bdev,
1299 struct ttm_buffer_object *bo,
1300 unsigned long size,
1301 enum ttm_bo_type type,
1302 struct ttm_placement *placement,
1303 uint32_t page_alignment,
1304 bool interruptible,
1305 size_t acc_size,
1306 struct sg_table *sg,
1307 struct reservation_object *resv,
1308 void (*destroy) (struct ttm_buffer_object *))
1309 {
1310 struct ttm_operation_ctx ctx = { interruptible, false };
1311 int ret;
1312
1313 ret = ttm_bo_init_reserved(bdev, bo, size, type, placement,
1314 page_alignment, &ctx, acc_size,
1315 sg, resv, destroy);
1316 if (ret)
1317 return ret;
1318
1319 if (!resv)
1320 ttm_bo_unreserve(bo);
1321
1322 return 0;
1323 }
1324 EXPORT_SYMBOL(ttm_bo_init);
1325
1326 size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
1327 unsigned long bo_size,
1328 unsigned struct_size)
1329 {
1330 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1331 size_t size = 0;
1332
1333 size += ttm_round_pot(struct_size);
1334 size += ttm_round_pot(npages * sizeof(void *));
1335 size += ttm_round_pot(sizeof(struct ttm_tt));
1336 return size;
1337 }
1338 EXPORT_SYMBOL(ttm_bo_acc_size);
1339
1340 size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
1341 unsigned long bo_size,
1342 unsigned struct_size)
1343 {
1344 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1345 size_t size = 0;
1346
1347 size += ttm_round_pot(struct_size);
1348 size += ttm_round_pot(npages * (2*sizeof(void *) + sizeof(dma_addr_t)));
1349 size += ttm_round_pot(sizeof(struct ttm_dma_tt));
1350 return size;
1351 }
1352 EXPORT_SYMBOL(ttm_bo_dma_acc_size);
1353
1354 int ttm_bo_create(struct ttm_bo_device *bdev,
1355 unsigned long size,
1356 enum ttm_bo_type type,
1357 struct ttm_placement *placement,
1358 uint32_t page_alignment,
1359 bool interruptible,
1360 struct ttm_buffer_object **p_bo)
1361 {
1362 struct ttm_buffer_object *bo;
1363 size_t acc_size;
1364 int ret;
1365
1366 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
1367 if (unlikely(bo == NULL))
1368 return -ENOMEM;
1369
1370 acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
1371 ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1372 interruptible, acc_size,
1373 NULL, NULL, NULL);
1374 if (likely(ret == 0))
1375 *p_bo = bo;
1376
1377 return ret;
1378 }
1379 EXPORT_SYMBOL(ttm_bo_create);
1380
1381 static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1382 unsigned mem_type)
1383 {
1384 struct ttm_operation_ctx ctx = {
1385 .interruptible = false,
1386 .no_wait_gpu = false,
1387 .flags = TTM_OPT_FLAG_FORCE_ALLOC
1388 };
1389 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1390 struct ttm_bo_global *glob = bdev->glob;
1391 struct dma_fence *fence;
1392 int ret;
1393 unsigned i;
1394
1395 /*
1396 * Can't use standard list traversal since we're unlocking.
1397 */
1398
1399 spin_lock(&glob->lru_lock);
1400 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
1401 while (!list_empty(&man->lru[i])) {
1402 spin_unlock(&glob->lru_lock);
1403 ret = ttm_mem_evict_first(bdev, mem_type, NULL, &ctx);
1404 if (ret)
1405 return ret;
1406 spin_lock(&glob->lru_lock);
1407 }
1408 }
1409 spin_unlock(&glob->lru_lock);
1410
1411 spin_lock(&man->move_lock);
1412 fence = dma_fence_get(man->move);
1413 spin_unlock(&man->move_lock);
1414
1415 if (fence) {
1416 ret = dma_fence_wait(fence, false);
1417 dma_fence_put(fence);
1418 if (ret)
1419 return ret;
1420 }
1421
1422 return 0;
1423 }
1424
1425 int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1426 {
1427 struct ttm_mem_type_manager *man;
1428 int ret = -EINVAL;
1429
1430 if (mem_type >= TTM_NUM_MEM_TYPES) {
1431 pr_err("Illegal memory type %d\n", mem_type);
1432 return ret;
1433 }
1434 man = &bdev->man[mem_type];
1435
1436 if (!man->has_type) {
1437 pr_err("Trying to take down uninitialized memory manager type %u\n",
1438 mem_type);
1439 return ret;
1440 }
1441
1442 man->use_type = false;
1443 man->has_type = false;
1444
1445 ret = 0;
1446 if (mem_type > 0) {
1447 ret = ttm_bo_force_list_clean(bdev, mem_type);
1448 if (ret) {
1449 pr_err("Cleanup eviction failed\n");
1450 return ret;
1451 }
1452
1453 ret = (*man->func->takedown)(man);
1454 }
1455
1456 dma_fence_put(man->move);
1457 man->move = NULL;
1458
1459 return ret;
1460 }
1461 EXPORT_SYMBOL(ttm_bo_clean_mm);
1462
1463 int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1464 {
1465 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1466
1467 if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1468 pr_err("Illegal memory manager memory type %u\n", mem_type);
1469 return -EINVAL;
1470 }
1471
1472 if (!man->has_type) {
1473 pr_err("Memory type %u has not been initialized\n", mem_type);
1474 return 0;
1475 }
1476
1477 return ttm_bo_force_list_clean(bdev, mem_type);
1478 }
1479 EXPORT_SYMBOL(ttm_bo_evict_mm);
1480
1481 int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1482 unsigned long p_size)
1483 {
1484 int ret;
1485 struct ttm_mem_type_manager *man;
1486 unsigned i;
1487
1488 BUG_ON(type >= TTM_NUM_MEM_TYPES);
1489 man = &bdev->man[type];
1490 BUG_ON(man->has_type);
1491 man->io_reserve_fastpath = true;
1492 man->use_io_reserve_lru = false;
1493 mutex_init(&man->io_reserve_mutex);
1494 spin_lock_init(&man->move_lock);
1495 INIT_LIST_HEAD(&man->io_reserve_lru);
1496
1497 ret = bdev->driver->init_mem_type(bdev, type, man);
1498 if (ret)
1499 return ret;
1500 man->bdev = bdev;
1501
1502 if (type != TTM_PL_SYSTEM) {
1503 ret = (*man->func->init)(man, p_size);
1504 if (ret)
1505 return ret;
1506 }
1507 man->has_type = true;
1508 man->use_type = true;
1509 man->size = p_size;
1510
1511 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1512 INIT_LIST_HEAD(&man->lru[i]);
1513 man->move = NULL;
1514
1515 return 0;
1516 }
1517 EXPORT_SYMBOL(ttm_bo_init_mm);
1518
1519 static void ttm_bo_global_kobj_release(struct kobject *kobj)
1520 {
1521 struct ttm_bo_global *glob =
1522 container_of(kobj, struct ttm_bo_global, kobj);
1523
1524 __free_page(glob->dummy_read_page);
1525 }
1526
1527 static void ttm_bo_global_release(void)
1528 {
1529 struct ttm_bo_global *glob = &ttm_bo_glob;
1530
1531 mutex_lock(&ttm_global_mutex);
1532 if (--glob->use_count > 0)
1533 goto out;
1534
1535 kobject_del(&glob->kobj);
1536 kobject_put(&glob->kobj);
1537 ttm_mem_global_release(&ttm_mem_glob);
1538 out:
1539 mutex_unlock(&ttm_global_mutex);
1540 }
1541
1542 static int ttm_bo_global_init(void)
1543 {
1544 struct ttm_bo_global *glob = &ttm_bo_glob;
1545 int ret = 0;
1546 unsigned i;
1547
1548 mutex_lock(&ttm_global_mutex);
1549 if (++glob->use_count > 1)
1550 goto out;
1551
1552 ret = ttm_mem_global_init(&ttm_mem_glob);
1553 if (ret)
1554 goto out;
1555
1556 spin_lock_init(&glob->lru_lock);
1557 glob->mem_glob = &ttm_mem_glob;
1558 glob->mem_glob->bo_glob = glob;
1559 glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
1560
1561 if (unlikely(glob->dummy_read_page == NULL)) {
1562 ret = -ENOMEM;
1563 goto out;
1564 }
1565
1566 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1567 INIT_LIST_HEAD(&glob->swap_lru[i]);
1568 INIT_LIST_HEAD(&glob->device_list);
1569 atomic_set(&glob->bo_count, 0);
1570
1571 ret = kobject_init_and_add(
1572 &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
1573 if (unlikely(ret != 0))
1574 kobject_put(&glob->kobj);
1575 out:
1576 mutex_unlock(&ttm_global_mutex);
1577 return ret;
1578 }
1579
1580 int ttm_bo_device_release(struct ttm_bo_device *bdev)
1581 {
1582 int ret = 0;
1583 unsigned i = TTM_NUM_MEM_TYPES;
1584 struct ttm_mem_type_manager *man;
1585 struct ttm_bo_global *glob = bdev->glob;
1586
1587 while (i--) {
1588 man = &bdev->man[i];
1589 if (man->has_type) {
1590 man->use_type = false;
1591 if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1592 ret = -EBUSY;
1593 pr_err("DRM memory manager type %d is not clean\n",
1594 i);
1595 }
1596 man->has_type = false;
1597 }
1598 }
1599
1600 mutex_lock(&ttm_global_mutex);
1601 list_del(&bdev->device_list);
1602 mutex_unlock(&ttm_global_mutex);
1603
1604 cancel_delayed_work_sync(&bdev->wq);
1605
1606 if (ttm_bo_delayed_delete(bdev, true))
1607 pr_debug("Delayed destroy list was clean\n");
1608
1609 spin_lock(&glob->lru_lock);
1610 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1611 if (list_empty(&bdev->man[0].lru[0]))
1612 pr_debug("Swap list %d was clean\n", i);
1613 spin_unlock(&glob->lru_lock);
1614
1615 drm_vma_offset_manager_destroy(&bdev->vma_manager);
1616
1617 if (!ret)
1618 ttm_bo_global_release();
1619
1620 return ret;
1621 }
1622 EXPORT_SYMBOL(ttm_bo_device_release);
1623
1624 int ttm_bo_device_init(struct ttm_bo_device *bdev,
1625 struct ttm_bo_driver *driver,
1626 struct address_space *mapping,
1627 uint64_t file_page_offset,
1628 bool need_dma32)
1629 {
1630 struct ttm_bo_global *glob = &ttm_bo_glob;
1631 int ret;
1632
1633 ret = ttm_bo_global_init();
1634 if (ret)
1635 return ret;
1636
1637 bdev->driver = driver;
1638
1639 memset(bdev->man, 0, sizeof(bdev->man));
1640
1641 /*
1642 * Initialize the system memory buffer type.
1643 * Other types need to be driver / IOCTL initialized.
1644 */
1645 ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1646 if (unlikely(ret != 0))
1647 goto out_no_sys;
1648
1649 drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
1650 0x10000000);
1651 INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
1652 INIT_LIST_HEAD(&bdev->ddestroy);
1653 bdev->dev_mapping = mapping;
1654 bdev->glob = glob;
1655 bdev->need_dma32 = need_dma32;
1656 mutex_lock(&ttm_global_mutex);
1657 list_add_tail(&bdev->device_list, &glob->device_list);
1658 mutex_unlock(&ttm_global_mutex);
1659
1660 return 0;
1661 out_no_sys:
1662 ttm_bo_global_release();
1663 return ret;
1664 }
1665 EXPORT_SYMBOL(ttm_bo_device_init);
1666
1667 /*
1668 * buffer object vm functions.
1669 */
1670
1671 bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1672 {
1673 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1674
1675 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1676 if (mem->mem_type == TTM_PL_SYSTEM)
1677 return false;
1678
1679 if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1680 return false;
1681
1682 if (mem->placement & TTM_PL_FLAG_CACHED)
1683 return false;
1684 }
1685 return true;
1686 }
1687
1688 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1689 {
1690 struct ttm_bo_device *bdev = bo->bdev;
1691
1692 drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);
1693 ttm_mem_io_free_vm(bo);
1694 }
1695
1696 void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1697 {
1698 struct ttm_bo_device *bdev = bo->bdev;
1699 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
1700
1701 ttm_mem_io_lock(man, false);
1702 ttm_bo_unmap_virtual_locked(bo);
1703 ttm_mem_io_unlock(man);
1704 }
1705
1706
1707 EXPORT_SYMBOL(ttm_bo_unmap_virtual);
1708
1709 int ttm_bo_wait(struct ttm_buffer_object *bo,
1710 bool interruptible, bool no_wait)
1711 {
1712 long timeout = 15 * HZ;
1713
1714 if (no_wait) {
1715 if (reservation_object_test_signaled_rcu(bo->resv, true))
1716 return 0;
1717 else
1718 return -EBUSY;
1719 }
1720
1721 timeout = reservation_object_wait_timeout_rcu(bo->resv, true,
1722 interruptible, timeout);
1723 if (timeout < 0)
1724 return timeout;
1725
1726 if (timeout == 0)
1727 return -EBUSY;
1728
1729 reservation_object_add_excl_fence(bo->resv, NULL);
1730 return 0;
1731 }
1732 EXPORT_SYMBOL(ttm_bo_wait);
1733
1734 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1735 {
1736 int ret = 0;
1737
1738 /*
1739 * Using ttm_bo_reserve makes sure the lru lists are updated.
1740 */
1741
1742 ret = ttm_bo_reserve(bo, true, no_wait, NULL);
1743 if (unlikely(ret != 0))
1744 return ret;
1745 ret = ttm_bo_wait(bo, true, no_wait);
1746 if (likely(ret == 0))
1747 atomic_inc(&bo->cpu_writers);
1748 ttm_bo_unreserve(bo);
1749 return ret;
1750 }
1751 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
1752
1753 void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1754 {
1755 atomic_dec(&bo->cpu_writers);
1756 }
1757 EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
1758
1759 /**
1760 * A buffer object shrink method that tries to swap out the first
1761 * buffer object on the bo_global::swap_lru list.
1762 */
1763 int ttm_bo_swapout(struct ttm_bo_global *glob, struct ttm_operation_ctx *ctx)
1764 {
1765 struct ttm_buffer_object *bo;
1766 int ret = -EBUSY;
1767 bool locked;
1768 unsigned i;
1769
1770 spin_lock(&glob->lru_lock);
1771 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
1772 list_for_each_entry(bo, &glob->swap_lru[i], swap) {
1773 if (ttm_bo_evict_swapout_allowable(bo, ctx, &locked)) {
1774 ret = 0;
1775 break;
1776 }
1777 }
1778 if (!ret)
1779 break;
1780 }
1781
1782 if (ret) {
1783 spin_unlock(&glob->lru_lock);
1784 return ret;
1785 }
1786
1787 kref_get(&bo->list_kref);
1788
1789 if (!list_empty(&bo->ddestroy)) {
1790 ret = ttm_bo_cleanup_refs(bo, false, false, locked);
1791 kref_put(&bo->list_kref, ttm_bo_release_list);
1792 return ret;
1793 }
1794
1795 ttm_bo_del_from_lru(bo);
1796 spin_unlock(&glob->lru_lock);
1797
1798 /**
1799 * Move to system cached
1800 */
1801
1802 if (bo->mem.mem_type != TTM_PL_SYSTEM ||
1803 bo->ttm->caching_state != tt_cached) {
1804 struct ttm_operation_ctx ctx = { false, false };
1805 struct ttm_mem_reg evict_mem;
1806
1807 evict_mem = bo->mem;
1808 evict_mem.mm_node = NULL;
1809 evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1810 evict_mem.mem_type = TTM_PL_SYSTEM;
1811
1812 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, &ctx);
1813 if (unlikely(ret != 0))
1814 goto out;
1815 }
1816
1817 /**
1818 * Make sure BO is idle.
1819 */
1820
1821 ret = ttm_bo_wait(bo, false, false);
1822 if (unlikely(ret != 0))
1823 goto out;
1824
1825 ttm_bo_unmap_virtual(bo);
1826
1827 /**
1828 * Swap out. Buffer will be swapped in again as soon as
1829 * anyone tries to access a ttm page.
1830 */
1831
1832 if (bo->bdev->driver->swap_notify)
1833 bo->bdev->driver->swap_notify(bo);
1834
1835 ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
1836 out:
1837
1838 /**
1839 *
1840 * Unreserve without putting on LRU to avoid swapping out an
1841 * already swapped buffer.
1842 */
1843 if (locked)
1844 reservation_object_unlock(bo->resv);
1845 kref_put(&bo->list_kref, ttm_bo_release_list);
1846 return ret;
1847 }
1848 EXPORT_SYMBOL(ttm_bo_swapout);
1849
1850 void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1851 {
1852 struct ttm_operation_ctx ctx = {
1853 .interruptible = false,
1854 .no_wait_gpu = false
1855 };
1856
1857 while (ttm_bo_swapout(bdev->glob, &ctx) == 0)
1858 ;
1859 }
1860 EXPORT_SYMBOL(ttm_bo_swapout_all);
1861
1862 /**
1863 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1864 * unreserved
1865 *
1866 * @bo: Pointer to buffer
1867 */
1868 int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
1869 {
1870 int ret;
1871
1872 /*
1873 * In the absense of a wait_unlocked API,
1874 * Use the bo::wu_mutex to avoid triggering livelocks due to
1875 * concurrent use of this function. Note that this use of
1876 * bo::wu_mutex can go away if we change locking order to
1877 * mmap_sem -> bo::reserve.
1878 */
1879 ret = mutex_lock_interruptible(&bo->wu_mutex);
1880 if (unlikely(ret != 0))
1881 return -ERESTARTSYS;
1882 if (!ww_mutex_is_locked(&bo->resv->lock))
1883 goto out_unlock;
1884 ret = reservation_object_lock_interruptible(bo->resv, NULL);
1885 if (ret == -EINTR)
1886 ret = -ERESTARTSYS;
1887 if (unlikely(ret != 0))
1888 goto out_unlock;
1889 reservation_object_unlock(bo->resv);
1890
1891 out_unlock:
1892 mutex_unlock(&bo->wu_mutex);
1893 return ret;
1894 }
Linux with added FPC-III support