?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console
[linux/fpc-iii.git] / drivers / gpu / drm / ttm / ttm_bo.c
blob268f5a3b312245e9a450cf49e7a515daa0076a8c
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 static struct attribute ttm_bo_count = {
49 .name = "bo_count",
50 .mode = S_IRUGO
51 };
52
53 /* default destructor */
54 static void ttm_bo_default_destroy(struct ttm_buffer_object *bo)
55 {
56 kfree(bo);
57 }
58
59 static inline int ttm_mem_type_from_place(const struct ttm_place *place,
60 uint32_t *mem_type)
61 {
62 int pos;
63
64 pos = ffs(place->flags & TTM_PL_MASK_MEM);
65 if (unlikely(!pos))
66 return -EINVAL;
67
68 *mem_type = pos - 1;
69 return 0;
70 }
71
72 static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
73 {
74 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
75 struct drm_printer p = drm_debug_printer(TTM_PFX);
76
77 pr_err(" has_type: %d\n", man->has_type);
78 pr_err(" use_type: %d\n", man->use_type);
79 pr_err(" flags: 0x%08X\n", man->flags);
80 pr_err(" gpu_offset: 0x%08llX\n", man->gpu_offset);
81 pr_err(" size: %llu\n", man->size);
82 pr_err(" available_caching: 0x%08X\n", man->available_caching);
83 pr_err(" default_caching: 0x%08X\n", man->default_caching);
84 if (mem_type != TTM_PL_SYSTEM)
85 (*man->func->debug)(man, &p);
86 }
87
88 static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
89 struct ttm_placement *placement)
90 {
91 int i, ret, mem_type;
92
93 pr_err("No space for %p (%lu pages, %luK, %luM)\n",
94 bo, bo->mem.num_pages, bo->mem.size >> 10,
95 bo->mem.size >> 20);
96 for (i = 0; i < placement->num_placement; i++) {
97 ret = ttm_mem_type_from_place(&placement->placement[i],
98 &mem_type);
99 if (ret)
100 return;
101 pr_err(" placement[%d]=0x%08X (%d)\n",
102 i, placement->placement[i].flags, mem_type);
103 ttm_mem_type_debug(bo->bdev, mem_type);
104 }
105 }
106
107 static ssize_t ttm_bo_global_show(struct kobject *kobj,
108 struct attribute *attr,
109 char *buffer)
110 {
111 struct ttm_bo_global *glob =
112 container_of(kobj, struct ttm_bo_global, kobj);
113
114 return snprintf(buffer, PAGE_SIZE, "%d\n",
115 atomic_read(&glob->bo_count));
116 }
117
118 static struct attribute *ttm_bo_global_attrs[] = {
119 &ttm_bo_count,
120 NULL
121 };
122
123 static const struct sysfs_ops ttm_bo_global_ops = {
124 .show = &ttm_bo_global_show
125 };
126
127 static struct kobj_type ttm_bo_glob_kobj_type = {
128 .release = &ttm_bo_global_kobj_release,
129 .sysfs_ops = &ttm_bo_global_ops,
130 .default_attrs = ttm_bo_global_attrs
131 };
132
133
134 static inline uint32_t ttm_bo_type_flags(unsigned type)
135 {
136 return 1 << (type);
137 }
138
139 static void ttm_bo_release_list(struct kref *list_kref)
140 {
141 struct ttm_buffer_object *bo =
142 container_of(list_kref, struct ttm_buffer_object, list_kref);
143 struct ttm_bo_device *bdev = bo->bdev;
144 size_t acc_size = bo->acc_size;
145
146 BUG_ON(kref_read(&bo->list_kref));
147 BUG_ON(kref_read(&bo->kref));
148 BUG_ON(atomic_read(&bo->cpu_writers));
149 BUG_ON(bo->mem.mm_node != NULL);
150 BUG_ON(!list_empty(&bo->lru));
151 BUG_ON(!list_empty(&bo->ddestroy));
152 ttm_tt_destroy(bo->ttm);
153 atomic_dec(&bo->bdev->glob->bo_count);
154 dma_fence_put(bo->moving);
155 reservation_object_fini(&bo->ttm_resv);
156 mutex_destroy(&bo->wu_mutex);
157 bo->destroy(bo);
158 ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
159 }
160
161 void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
162 {
163 struct ttm_bo_device *bdev = bo->bdev;
164 struct ttm_mem_type_manager *man;
165
166 reservation_object_assert_held(bo->resv);
167
168 if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
169 BUG_ON(!list_empty(&bo->lru));
170
171 man = &bdev->man[bo->mem.mem_type];
172 list_add_tail(&bo->lru, &man->lru[bo->priority]);
173 kref_get(&bo->list_kref);
174
175 if (bo->ttm && !(bo->ttm->page_flags &
176 (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) {
177 list_add_tail(&bo->swap,
178 &bdev->glob->swap_lru[bo->priority]);
179 kref_get(&bo->list_kref);
180 }
181 }
182 }
183 EXPORT_SYMBOL(ttm_bo_add_to_lru);
184
185 static void ttm_bo_ref_bug(struct kref *list_kref)
186 {
187 BUG();
188 }
189
190 void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
191 {
192 if (!list_empty(&bo->swap)) {
193 list_del_init(&bo->swap);
194 kref_put(&bo->list_kref, ttm_bo_ref_bug);
195 }
196 if (!list_empty(&bo->lru)) {
197 list_del_init(&bo->lru);
198 kref_put(&bo->list_kref, ttm_bo_ref_bug);
199 }
200
201 /*
202 * TODO: Add a driver hook to delete from
203 * driver-specific LRU's here.
204 */
205 }
206
207 void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
208 {
209 struct ttm_bo_global *glob = bo->bdev->glob;
210
211 spin_lock(&glob->lru_lock);
212 ttm_bo_del_from_lru(bo);
213 spin_unlock(&glob->lru_lock);
214 }
215 EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
216
217 void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
218 {
219 reservation_object_assert_held(bo->resv);
220
221 ttm_bo_del_from_lru(bo);
222 ttm_bo_add_to_lru(bo);
223 }
224 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
225
226 static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
227 struct ttm_mem_reg *mem, bool evict,
228 struct ttm_operation_ctx *ctx)
229 {
230 struct ttm_bo_device *bdev = bo->bdev;
231 bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
232 bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
233 struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
234 struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
235 int ret = 0;
236
237 if (old_is_pci || new_is_pci ||
238 ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
239 ret = ttm_mem_io_lock(old_man, true);
240 if (unlikely(ret != 0))
241 goto out_err;
242 ttm_bo_unmap_virtual_locked(bo);
243 ttm_mem_io_unlock(old_man);
244 }
245
246 /*
247 * Create and bind a ttm if required.
248 */
249
250 if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
251 if (bo->ttm == NULL) {
252 bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
253 ret = ttm_tt_create(bo, zero);
254 if (ret)
255 goto out_err;
256 }
257
258 ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
259 if (ret)
260 goto out_err;
261
262 if (mem->mem_type != TTM_PL_SYSTEM) {
263 ret = ttm_tt_bind(bo->ttm, mem, ctx);
264 if (ret)
265 goto out_err;
266 }
267
268 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
269 if (bdev->driver->move_notify)
270 bdev->driver->move_notify(bo, evict, mem);
271 bo->mem = *mem;
272 mem->mm_node = NULL;
273 goto moved;
274 }
275 }
276
277 if (bdev->driver->move_notify)
278 bdev->driver->move_notify(bo, evict, mem);
279
280 if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
281 !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
282 ret = ttm_bo_move_ttm(bo, ctx, mem);
283 else if (bdev->driver->move)
284 ret = bdev->driver->move(bo, evict, ctx, mem);
285 else
286 ret = ttm_bo_move_memcpy(bo, ctx, mem);
287
288 if (ret) {
289 if (bdev->driver->move_notify) {
290 swap(*mem, bo->mem);
291 bdev->driver->move_notify(bo, false, mem);
292 swap(*mem, bo->mem);
293 }
294
295 goto out_err;
296 }
297
298 moved:
299 if (bo->evicted) {
300 if (bdev->driver->invalidate_caches) {
301 ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
302 if (ret)
303 pr_err("Can not flush read caches\n");
304 }
305 bo->evicted = false;
306 }
307
308 if (bo->mem.mm_node)
309 bo->offset = (bo->mem.start << PAGE_SHIFT) +
310 bdev->man[bo->mem.mem_type].gpu_offset;
311 else
312 bo->offset = 0;
313
314 ctx->bytes_moved += bo->num_pages << PAGE_SHIFT;
315 return 0;
316
317 out_err:
318 new_man = &bdev->man[bo->mem.mem_type];
319 if (new_man->flags & TTM_MEMTYPE_FLAG_FIXED) {
320 ttm_tt_destroy(bo->ttm);
321 bo->ttm = NULL;
322 }
323
324 return ret;
325 }
326
327 /**
328 * Call bo::reserved.
329 * Will release GPU memory type usage on destruction.
330 * This is the place to put in driver specific hooks to release
331 * driver private resources.
332 * Will release the bo::reserved lock.
333 */
334
335 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
336 {
337 if (bo->bdev->driver->move_notify)
338 bo->bdev->driver->move_notify(bo, false, NULL);
339
340 ttm_tt_destroy(bo->ttm);
341 bo->ttm = NULL;
342 ttm_bo_mem_put(bo, &bo->mem);
343 }
344
345 static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo)
346 {
347 int r;
348
349 if (bo->resv == &bo->ttm_resv)
350 return 0;
351
352 BUG_ON(!reservation_object_trylock(&bo->ttm_resv));
353
354 r = reservation_object_copy_fences(&bo->ttm_resv, bo->resv);
355 if (r)
356 reservation_object_unlock(&bo->ttm_resv);
357
358 return r;
359 }
360
361 static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
362 {
363 struct reservation_object_list *fobj;
364 struct dma_fence *fence;
365 int i;
366
367 fobj = reservation_object_get_list(&bo->ttm_resv);
368 fence = reservation_object_get_excl(&bo->ttm_resv);
369 if (fence && !fence->ops->signaled)
370 dma_fence_enable_sw_signaling(fence);
371
372 for (i = 0; fobj && i < fobj->shared_count; ++i) {
373 fence = rcu_dereference_protected(fobj->shared[i],
374 reservation_object_held(bo->resv));
375
376 if (!fence->ops->signaled)
377 dma_fence_enable_sw_signaling(fence);
378 }
379 }
380
381 static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
382 {
383 struct ttm_bo_device *bdev = bo->bdev;
384 struct ttm_bo_global *glob = bdev->glob;
385 int ret;
386
387 ret = ttm_bo_individualize_resv(bo);
388 if (ret) {
389 /* Last resort, if we fail to allocate memory for the
390 * fences block for the BO to become idle
391 */
392 reservation_object_wait_timeout_rcu(bo->resv, true, false,
393 30 * HZ);
394 spin_lock(&glob->lru_lock);
395 goto error;
396 }
397
398 spin_lock(&glob->lru_lock);
399 ret = reservation_object_trylock(bo->resv) ? 0 : -EBUSY;
400 if (!ret) {
401 if (reservation_object_test_signaled_rcu(&bo->ttm_resv, true)) {
402 ttm_bo_del_from_lru(bo);
403 spin_unlock(&glob->lru_lock);
404 if (bo->resv != &bo->ttm_resv)
405 reservation_object_unlock(&bo->ttm_resv);
406
407 ttm_bo_cleanup_memtype_use(bo);
408 reservation_object_unlock(bo->resv);
409 return;
410 }
411
412 ttm_bo_flush_all_fences(bo);
413
414 /*
415 * Make NO_EVICT bos immediately available to
416 * shrinkers, now that they are queued for
417 * destruction.
418 */
419 if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
420 bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT;
421 ttm_bo_add_to_lru(bo);
422 }
423
424 reservation_object_unlock(bo->resv);
425 }
426 if (bo->resv != &bo->ttm_resv)
427 reservation_object_unlock(&bo->ttm_resv);
428
429 error:
430 kref_get(&bo->list_kref);
431 list_add_tail(&bo->ddestroy, &bdev->ddestroy);
432 spin_unlock(&glob->lru_lock);
433
434 schedule_delayed_work(&bdev->wq,
435 ((HZ / 100) < 1) ? 1 : HZ / 100);
436 }
437
438 /**
439 * function ttm_bo_cleanup_refs
440 * If bo idle, remove from delayed- and lru lists, and unref.
441 * If not idle, do nothing.
442 *
443 * Must be called with lru_lock and reservation held, this function
444 * will drop the lru lock and optionally the reservation lock before returning.
445 *
446 * @interruptible Any sleeps should occur interruptibly.
447 * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
448 * @unlock_resv Unlock the reservation lock as well.
449 */
450
451 static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
452 bool interruptible, bool no_wait_gpu,
453 bool unlock_resv)
454 {
455 struct ttm_bo_global *glob = bo->bdev->glob;
456 struct reservation_object *resv;
457 int ret;
458
459 if (unlikely(list_empty(&bo->ddestroy)))
460 resv = bo->resv;
461 else
462 resv = &bo->ttm_resv;
463
464 if (reservation_object_test_signaled_rcu(resv, true))
465 ret = 0;
466 else
467 ret = -EBUSY;
468
469 if (ret && !no_wait_gpu) {
470 long lret;
471
472 if (unlock_resv)
473 reservation_object_unlock(bo->resv);
474 spin_unlock(&glob->lru_lock);
475
476 lret = reservation_object_wait_timeout_rcu(resv, true,
477 interruptible,
478 30 * HZ);
479
480 if (lret < 0)
481 return lret;
482 else if (lret == 0)
483 return -EBUSY;
484
485 spin_lock(&glob->lru_lock);
486 if (unlock_resv && !reservation_object_trylock(bo->resv)) {
487 /*
488 * We raced, and lost, someone else holds the reservation now,
489 * and is probably busy in ttm_bo_cleanup_memtype_use.
490 *
491 * Even if it's not the case, because we finished waiting any
492 * delayed destruction would succeed, so just return success
493 * here.
494 */
495 spin_unlock(&glob->lru_lock);
496 return 0;
497 }
498 ret = 0;
499 }
500
501 if (ret || unlikely(list_empty(&bo->ddestroy))) {
502 if (unlock_resv)
503 reservation_object_unlock(bo->resv);
504 spin_unlock(&glob->lru_lock);
505 return ret;
506 }
507
508 ttm_bo_del_from_lru(bo);
509 list_del_init(&bo->ddestroy);
510 kref_put(&bo->list_kref, ttm_bo_ref_bug);
511
512 spin_unlock(&glob->lru_lock);
513 ttm_bo_cleanup_memtype_use(bo);
514
515 if (unlock_resv)
516 reservation_object_unlock(bo->resv);
517
518 return 0;
519 }
520
521 /**
522 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
523 * encountered buffers.
524 */
525 static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
526 {
527 struct ttm_bo_global *glob = bdev->glob;
528 struct list_head removed;
529 bool empty;
530
531 INIT_LIST_HEAD(&removed);
532
533 spin_lock(&glob->lru_lock);
534 while (!list_empty(&bdev->ddestroy)) {
535 struct ttm_buffer_object *bo;
536
537 bo = list_first_entry(&bdev->ddestroy, struct ttm_buffer_object,
538 ddestroy);
539 kref_get(&bo->list_kref);
540 list_move_tail(&bo->ddestroy, &removed);
541
542 if (remove_all || bo->resv != &bo->ttm_resv) {
543 spin_unlock(&glob->lru_lock);
544 reservation_object_lock(bo->resv, NULL);
545
546 spin_lock(&glob->lru_lock);
547 ttm_bo_cleanup_refs(bo, false, !remove_all, true);
548
549 } else if (reservation_object_trylock(bo->resv)) {
550 ttm_bo_cleanup_refs(bo, false, !remove_all, true);
551 } else {
552 spin_unlock(&glob->lru_lock);
553 }
554
555 kref_put(&bo->list_kref, ttm_bo_release_list);
556 spin_lock(&glob->lru_lock);
557 }
558 list_splice_tail(&removed, &bdev->ddestroy);
559 empty = list_empty(&bdev->ddestroy);
560 spin_unlock(&glob->lru_lock);
561
562 return empty;
563 }
564
565 static void ttm_bo_delayed_workqueue(struct work_struct *work)
566 {
567 struct ttm_bo_device *bdev =
568 container_of(work, struct ttm_bo_device, wq.work);
569
570 if (!ttm_bo_delayed_delete(bdev, false))
571 schedule_delayed_work(&bdev->wq,
572 ((HZ / 100) < 1) ? 1 : HZ / 100);
573 }
574
575 static void ttm_bo_release(struct kref *kref)
576 {
577 struct ttm_buffer_object *bo =
578 container_of(kref, struct ttm_buffer_object, kref);
579 struct ttm_bo_device *bdev = bo->bdev;
580 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
581
582 drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
583 ttm_mem_io_lock(man, false);
584 ttm_mem_io_free_vm(bo);
585 ttm_mem_io_unlock(man);
586 ttm_bo_cleanup_refs_or_queue(bo);
587 kref_put(&bo->list_kref, ttm_bo_release_list);
588 }
589
590 void ttm_bo_put(struct ttm_buffer_object *bo)
591 {
592 kref_put(&bo->kref, ttm_bo_release);
593 }
594 EXPORT_SYMBOL(ttm_bo_put);
595
596 void ttm_bo_unref(struct ttm_buffer_object **p_bo)
597 {
598 struct ttm_buffer_object *bo = *p_bo;
599
600 *p_bo = NULL;
601 ttm_bo_put(bo);
602 }
603 EXPORT_SYMBOL(ttm_bo_unref);
604
605 int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
606 {
607 return cancel_delayed_work_sync(&bdev->wq);
608 }
609 EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
610
611 void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
612 {
613 if (resched)
614 schedule_delayed_work(&bdev->wq,
615 ((HZ / 100) < 1) ? 1 : HZ / 100);
616 }
617 EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
618
619 static int ttm_bo_evict(struct ttm_buffer_object *bo,
620 struct ttm_operation_ctx *ctx)
621 {
622 struct ttm_bo_device *bdev = bo->bdev;
623 struct ttm_mem_reg evict_mem;
624 struct ttm_placement placement;
625 int ret = 0;
626
627 reservation_object_assert_held(bo->resv);
628
629 placement.num_placement = 0;
630 placement.num_busy_placement = 0;
631 bdev->driver->evict_flags(bo, &placement);
632
633 if (!placement.num_placement && !placement.num_busy_placement) {
634 ret = ttm_bo_pipeline_gutting(bo);
635 if (ret)
636 return ret;
637
638 return ttm_tt_create(bo, false);
639 }
640
641 evict_mem = bo->mem;
642 evict_mem.mm_node = NULL;
643 evict_mem.bus.io_reserved_vm = false;
644 evict_mem.bus.io_reserved_count = 0;
645
646 ret = ttm_bo_mem_space(bo, &placement, &evict_mem, ctx);
647 if (ret) {
648 if (ret != -ERESTARTSYS) {
649 pr_err("Failed to find memory space for buffer 0x%p eviction\n",
650 bo);
651 ttm_bo_mem_space_debug(bo, &placement);
652 }
653 goto out;
654 }
655
656 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, ctx);
657 if (unlikely(ret)) {
658 if (ret != -ERESTARTSYS)
659 pr_err("Buffer eviction failed\n");
660 ttm_bo_mem_put(bo, &evict_mem);
661 goto out;
662 }
663 bo->evicted = true;
664 out:
665 return ret;
666 }
667
668 bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
669 const struct ttm_place *place)
670 {
671 /* Don't evict this BO if it's outside of the
672 * requested placement range
673 */
674 if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
675 (place->lpfn && place->lpfn <= bo->mem.start))
676 return false;
677
678 return true;
679 }
680 EXPORT_SYMBOL(ttm_bo_eviction_valuable);
681
682 /**
683 * Check the target bo is allowable to be evicted or swapout, including cases:
684 *
685 * a. if share same reservation object with ctx->resv, have assumption
686 * reservation objects should already be locked, so not lock again and
687 * return true directly when either the opreation allow_reserved_eviction
688 * or the target bo already is in delayed free list;
689 *
690 * b. Otherwise, trylock it.
691 */
692 static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
693 struct ttm_operation_ctx *ctx, bool *locked)
694 {
695 bool ret = false;
696
697 *locked = false;
698 if (bo->resv == ctx->resv) {
699 reservation_object_assert_held(bo->resv);
700 if (ctx->flags & TTM_OPT_FLAG_ALLOW_RES_EVICT
701 || !list_empty(&bo->ddestroy))
702 ret = true;
703 } else {
704 *locked = reservation_object_trylock(bo->resv);
705 ret = *locked;
706 }
707
708 return ret;
709 }
710
711 static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
712 uint32_t mem_type,
713 const struct ttm_place *place,
714 struct ttm_operation_ctx *ctx)
715 {
716 struct ttm_bo_global *glob = bdev->glob;
717 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
718 struct ttm_buffer_object *bo = NULL;
719 bool locked = false;
720 unsigned i;
721 int ret;
722
723 spin_lock(&glob->lru_lock);
724 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
725 list_for_each_entry(bo, &man->lru[i], lru) {
726 if (!ttm_bo_evict_swapout_allowable(bo, ctx, &locked))
727 continue;
728
729 if (place && !bdev->driver->eviction_valuable(bo,
730 place)) {
731 if (locked)
732 reservation_object_unlock(bo->resv);
733 continue;
734 }
735 break;
736 }
737
738 /* If the inner loop terminated early, we have our candidate */
739 if (&bo->lru != &man->lru[i])
740 break;
741
742 bo = NULL;
743 }
744
745 if (!bo) {
746 spin_unlock(&glob->lru_lock);
747 return -EBUSY;
748 }
749
750 kref_get(&bo->list_kref);
751
752 if (!list_empty(&bo->ddestroy)) {
753 ret = ttm_bo_cleanup_refs(bo, ctx->interruptible,
754 ctx->no_wait_gpu, locked);
755 kref_put(&bo->list_kref, ttm_bo_release_list);
756 return ret;
757 }
758
759 ttm_bo_del_from_lru(bo);
760 spin_unlock(&glob->lru_lock);
761
762 ret = ttm_bo_evict(bo, ctx);
763 if (locked) {
764 ttm_bo_unreserve(bo);
765 } else {
766 spin_lock(&glob->lru_lock);
767 ttm_bo_add_to_lru(bo);
768 spin_unlock(&glob->lru_lock);
769 }
770
771 kref_put(&bo->list_kref, ttm_bo_release_list);
772 return ret;
773 }
774
775 void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
776 {
777 struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
778
779 if (mem->mm_node)
780 (*man->func->put_node)(man, mem);
781 }
782 EXPORT_SYMBOL(ttm_bo_mem_put);
783
784 /**
785 * Add the last move fence to the BO and reserve a new shared slot.
786 */
787 static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
788 struct ttm_mem_type_manager *man,
789 struct ttm_mem_reg *mem)
790 {
791 struct dma_fence *fence;
792 int ret;
793
794 spin_lock(&man->move_lock);
795 fence = dma_fence_get(man->move);
796 spin_unlock(&man->move_lock);
797
798 if (fence) {
799 reservation_object_add_shared_fence(bo->resv, fence);
800
801 ret = reservation_object_reserve_shared(bo->resv);
802 if (unlikely(ret))
803 return ret;
804
805 dma_fence_put(bo->moving);
806 bo->moving = fence;
807 }
808
809 return 0;
810 }
811
812 /**
813 * Repeatedly evict memory from the LRU for @mem_type until we create enough
814 * space, or we've evicted everything and there isn't enough space.
815 */
816 static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
817 uint32_t mem_type,
818 const struct ttm_place *place,
819 struct ttm_mem_reg *mem,
820 struct ttm_operation_ctx *ctx)
821 {
822 struct ttm_bo_device *bdev = bo->bdev;
823 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
824 int ret;
825
826 do {
827 ret = (*man->func->get_node)(man, bo, place, mem);
828 if (unlikely(ret != 0))
829 return ret;
830 if (mem->mm_node)
831 break;
832 ret = ttm_mem_evict_first(bdev, mem_type, place, ctx);
833 if (unlikely(ret != 0))
834 return ret;
835 } while (1);
836 mem->mem_type = mem_type;
837 return ttm_bo_add_move_fence(bo, man, mem);
838 }
839
840 static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
841 uint32_t cur_placement,
842 uint32_t proposed_placement)
843 {
844 uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
845 uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
846
847 /**
848 * Keep current caching if possible.
849 */
850
851 if ((cur_placement & caching) != 0)
852 result |= (cur_placement & caching);
853 else if ((man->default_caching & caching) != 0)
854 result |= man->default_caching;
855 else if ((TTM_PL_FLAG_CACHED & caching) != 0)
856 result |= TTM_PL_FLAG_CACHED;
857 else if ((TTM_PL_FLAG_WC & caching) != 0)
858 result |= TTM_PL_FLAG_WC;
859 else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
860 result |= TTM_PL_FLAG_UNCACHED;
861
862 return result;
863 }
864
865 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
866 uint32_t mem_type,
867 const struct ttm_place *place,
868 uint32_t *masked_placement)
869 {
870 uint32_t cur_flags = ttm_bo_type_flags(mem_type);
871
872 if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0)
873 return false;
874
875 if ((place->flags & man->available_caching) == 0)
876 return false;
877
878 cur_flags |= (place->flags & man->available_caching);
879
880 *masked_placement = cur_flags;
881 return true;
882 }
883
884 /**
885 * Creates space for memory region @mem according to its type.
886 *
887 * This function first searches for free space in compatible memory types in
888 * the priority order defined by the driver. If free space isn't found, then
889 * ttm_bo_mem_force_space is attempted in priority order to evict and find
890 * space.
891 */
892 int ttm_bo_mem_space(struct ttm_buffer_object *bo,
893 struct ttm_placement *placement,
894 struct ttm_mem_reg *mem,
895 struct ttm_operation_ctx *ctx)
896 {
897 struct ttm_bo_device *bdev = bo->bdev;
898 struct ttm_mem_type_manager *man;
899 uint32_t mem_type = TTM_PL_SYSTEM;
900 uint32_t cur_flags = 0;
901 bool type_found = false;
902 bool type_ok = false;
903 bool has_erestartsys = false;
904 int i, ret;
905
906 ret = reservation_object_reserve_shared(bo->resv);
907 if (unlikely(ret))
908 return ret;
909
910 mem->mm_node = NULL;
911 for (i = 0; i < placement->num_placement; ++i) {
912 const struct ttm_place *place = &placement->placement[i];
913
914 ret = ttm_mem_type_from_place(place, &mem_type);
915 if (ret)
916 return ret;
917 man = &bdev->man[mem_type];
918 if (!man->has_type || !man->use_type)
919 continue;
920
921 type_ok = ttm_bo_mt_compatible(man, mem_type, place,
922 &cur_flags);
923
924 if (!type_ok)
925 continue;
926
927 type_found = true;
928 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
929 cur_flags);
930 /*
931 * Use the access and other non-mapping-related flag bits from
932 * the memory placement flags to the current flags
933 */
934 ttm_flag_masked(&cur_flags, place->flags,
935 ~TTM_PL_MASK_MEMTYPE);
936
937 if (mem_type == TTM_PL_SYSTEM)
938 break;
939
940 ret = (*man->func->get_node)(man, bo, place, mem);
941 if (unlikely(ret))
942 return ret;
943
944 if (mem->mm_node) {
945 ret = ttm_bo_add_move_fence(bo, man, mem);
946 if (unlikely(ret)) {
947 (*man->func->put_node)(man, mem);
948 return ret;
949 }
950 break;
951 }
952 }
953
954 if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
955 mem->mem_type = mem_type;
956 mem->placement = cur_flags;
957 return 0;
958 }
959
960 for (i = 0; i < placement->num_busy_placement; ++i) {
961 const struct ttm_place *place = &placement->busy_placement[i];
962
963 ret = ttm_mem_type_from_place(place, &mem_type);
964 if (ret)
965 return ret;
966 man = &bdev->man[mem_type];
967 if (!man->has_type || !man->use_type)
968 continue;
969 if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
970 continue;
971
972 type_found = true;
973 cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
974 cur_flags);
975 /*
976 * Use the access and other non-mapping-related flag bits from
977 * the memory placement flags to the current flags
978 */
979 ttm_flag_masked(&cur_flags, place->flags,
980 ~TTM_PL_MASK_MEMTYPE);
981
982 if (mem_type == TTM_PL_SYSTEM) {
983 mem->mem_type = mem_type;
984 mem->placement = cur_flags;
985 mem->mm_node = NULL;
986 return 0;
987 }
988
989 ret = ttm_bo_mem_force_space(bo, mem_type, place, mem, ctx);
990 if (ret == 0 && mem->mm_node) {
991 mem->placement = cur_flags;
992 return 0;
993 }
994 if (ret == -ERESTARTSYS)
995 has_erestartsys = true;
996 }
997
998 if (!type_found) {
999 pr_err(TTM_PFX "No compatible memory type found\n");
1000 return -EINVAL;
1001 }
1002
1003 return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
1004 }
1005 EXPORT_SYMBOL(ttm_bo_mem_space);
1006
1007 static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
1008 struct ttm_placement *placement,
1009 struct ttm_operation_ctx *ctx)
1010 {
1011 int ret = 0;
1012 struct ttm_mem_reg mem;
1013
1014 reservation_object_assert_held(bo->resv);
1015
1016 mem.num_pages = bo->num_pages;
1017 mem.size = mem.num_pages << PAGE_SHIFT;
1018 mem.page_alignment = bo->mem.page_alignment;
1019 mem.bus.io_reserved_vm = false;
1020 mem.bus.io_reserved_count = 0;
1021 /*
1022 * Determine where to move the buffer.
1023 */
1024 ret = ttm_bo_mem_space(bo, placement, &mem, ctx);
1025 if (ret)
1026 goto out_unlock;
1027 ret = ttm_bo_handle_move_mem(bo, &mem, false, ctx);
1028 out_unlock:
1029 if (ret && mem.mm_node)
1030 ttm_bo_mem_put(bo, &mem);
1031 return ret;
1032 }
1033
1034 static bool ttm_bo_places_compat(const struct ttm_place *places,
1035 unsigned num_placement,
1036 struct ttm_mem_reg *mem,
1037 uint32_t *new_flags)
1038 {
1039 unsigned i;
1040
1041 for (i = 0; i < num_placement; i++) {
1042 const struct ttm_place *heap = &places[i];
1043
1044 if (mem->mm_node && (mem->start < heap->fpfn ||
1045 (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
1046 continue;
1047
1048 *new_flags = heap->flags;
1049 if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
1050 (*new_flags & mem->placement & TTM_PL_MASK_MEM) &&
1051 (!(*new_flags & TTM_PL_FLAG_CONTIGUOUS) ||
1052 (mem->placement & TTM_PL_FLAG_CONTIGUOUS)))
1053 return true;
1054 }
1055 return false;
1056 }
1057
1058 bool ttm_bo_mem_compat(struct ttm_placement *placement,
1059 struct ttm_mem_reg *mem,
1060 uint32_t *new_flags)
1061 {
1062 if (ttm_bo_places_compat(placement->placement, placement->num_placement,
1063 mem, new_flags))
1064 return true;
1065
1066 if ((placement->busy_placement != placement->placement ||
1067 placement->num_busy_placement > placement->num_placement) &&
1068 ttm_bo_places_compat(placement->busy_placement,
1069 placement->num_busy_placement,
1070 mem, new_flags))
1071 return true;
1072
1073 return false;
1074 }
1075 EXPORT_SYMBOL(ttm_bo_mem_compat);
1076
1077 int ttm_bo_validate(struct ttm_buffer_object *bo,
1078 struct ttm_placement *placement,
1079 struct ttm_operation_ctx *ctx)
1080 {
1081 int ret;
1082 uint32_t new_flags;
1083
1084 reservation_object_assert_held(bo->resv);
1085 /*
1086 * Check whether we need to move buffer.
1087 */
1088 if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
1089 ret = ttm_bo_move_buffer(bo, placement, ctx);
1090 if (ret)
1091 return ret;
1092 } else {
1093 /*
1094 * Use the access and other non-mapping-related flag bits from
1095 * the compatible memory placement flags to the active flags
1096 */
1097 ttm_flag_masked(&bo->mem.placement, new_flags,
1098 ~TTM_PL_MASK_MEMTYPE);
1099 }
1100 /*
1101 * We might need to add a TTM.
1102 */
1103 if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1104 ret = ttm_tt_create(bo, true);
1105 if (ret)
1106 return ret;
1107 }
1108 return 0;
1109 }
1110 EXPORT_SYMBOL(ttm_bo_validate);
1111
1112 int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
1113 struct ttm_buffer_object *bo,
1114 unsigned long size,
1115 enum ttm_bo_type type,
1116 struct ttm_placement *placement,
1117 uint32_t page_alignment,
1118 struct ttm_operation_ctx *ctx,
1119 size_t acc_size,
1120 struct sg_table *sg,
1121 struct reservation_object *resv,
1122 void (*destroy) (struct ttm_buffer_object *))
1123 {
1124 int ret = 0;
1125 unsigned long num_pages;
1126 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1127 bool locked;
1128
1129 ret = ttm_mem_global_alloc(mem_glob, acc_size, ctx);
1130 if (ret) {
1131 pr_err("Out of kernel memory\n");
1132 if (destroy)
1133 (*destroy)(bo);
1134 else
1135 kfree(bo);
1136 return -ENOMEM;
1137 }
1138
1139 num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1140 if (num_pages == 0) {
1141 pr_err("Illegal buffer object size\n");
1142 if (destroy)
1143 (*destroy)(bo);
1144 else
1145 kfree(bo);
1146 ttm_mem_global_free(mem_glob, acc_size);
1147 return -EINVAL;
1148 }
1149 bo->destroy = destroy ? destroy : ttm_bo_default_destroy;
1150
1151 kref_init(&bo->kref);
1152 kref_init(&bo->list_kref);
1153 atomic_set(&bo->cpu_writers, 0);
1154 INIT_LIST_HEAD(&bo->lru);
1155 INIT_LIST_HEAD(&bo->ddestroy);
1156 INIT_LIST_HEAD(&bo->swap);
1157 INIT_LIST_HEAD(&bo->io_reserve_lru);
1158 mutex_init(&bo->wu_mutex);
1159 bo->bdev = bdev;
1160 bo->type = type;
1161 bo->num_pages = num_pages;
1162 bo->mem.size = num_pages << PAGE_SHIFT;
1163 bo->mem.mem_type = TTM_PL_SYSTEM;
1164 bo->mem.num_pages = bo->num_pages;
1165 bo->mem.mm_node = NULL;
1166 bo->mem.page_alignment = page_alignment;
1167 bo->mem.bus.io_reserved_vm = false;
1168 bo->mem.bus.io_reserved_count = 0;
1169 bo->moving = NULL;
1170 bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1171 bo->acc_size = acc_size;
1172 bo->sg = sg;
1173 if (resv) {
1174 bo->resv = resv;
1175 reservation_object_assert_held(bo->resv);
1176 } else {
1177 bo->resv = &bo->ttm_resv;
1178 }
1179 reservation_object_init(&bo->ttm_resv);
1180 atomic_inc(&bo->bdev->glob->bo_count);
1181 drm_vma_node_reset(&bo->vma_node);
1182
1183 /*
1184 * For ttm_bo_type_device buffers, allocate
1185 * address space from the device.
1186 */
1187 if (bo->type == ttm_bo_type_device ||
1188 bo->type == ttm_bo_type_sg)
1189 ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
1190 bo->mem.num_pages);
1191
1192 /* passed reservation objects should already be locked,
1193 * since otherwise lockdep will be angered in radeon.
1194 */
1195 if (!resv) {
1196 locked = reservation_object_trylock(bo->resv);
1197 WARN_ON(!locked);
1198 }
1199
1200 if (likely(!ret))
1201 ret = ttm_bo_validate(bo, placement, ctx);
1202
1203 if (unlikely(ret)) {
1204 if (!resv)
1205 ttm_bo_unreserve(bo);
1206
1207 ttm_bo_put(bo);
1208 return ret;
1209 }
1210
1211 if (resv && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
1212 spin_lock(&bdev->glob->lru_lock);
1213 ttm_bo_add_to_lru(bo);
1214 spin_unlock(&bdev->glob->lru_lock);
1215 }
1216
1217 return ret;
1218 }
1219 EXPORT_SYMBOL(ttm_bo_init_reserved);
1220
1221 int ttm_bo_init(struct ttm_bo_device *bdev,
1222 struct ttm_buffer_object *bo,
1223 unsigned long size,
1224 enum ttm_bo_type type,
1225 struct ttm_placement *placement,
1226 uint32_t page_alignment,
1227 bool interruptible,
1228 size_t acc_size,
1229 struct sg_table *sg,
1230 struct reservation_object *resv,
1231 void (*destroy) (struct ttm_buffer_object *))
1232 {
1233 struct ttm_operation_ctx ctx = { interruptible, false };
1234 int ret;
1235
1236 ret = ttm_bo_init_reserved(bdev, bo, size, type, placement,
1237 page_alignment, &ctx, acc_size,
1238 sg, resv, destroy);
1239 if (ret)
1240 return ret;
1241
1242 if (!resv)
1243 ttm_bo_unreserve(bo);
1244
1245 return 0;
1246 }
1247 EXPORT_SYMBOL(ttm_bo_init);
1248
1249 size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
1250 unsigned long bo_size,
1251 unsigned struct_size)
1252 {
1253 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1254 size_t size = 0;
1255
1256 size += ttm_round_pot(struct_size);
1257 size += ttm_round_pot(npages * sizeof(void *));
1258 size += ttm_round_pot(sizeof(struct ttm_tt));
1259 return size;
1260 }
1261 EXPORT_SYMBOL(ttm_bo_acc_size);
1262
1263 size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
1264 unsigned long bo_size,
1265 unsigned struct_size)
1266 {
1267 unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1268 size_t size = 0;
1269
1270 size += ttm_round_pot(struct_size);
1271 size += ttm_round_pot(npages * (2*sizeof(void *) + sizeof(dma_addr_t)));
1272 size += ttm_round_pot(sizeof(struct ttm_dma_tt));
1273 return size;
1274 }
1275 EXPORT_SYMBOL(ttm_bo_dma_acc_size);
1276
1277 int ttm_bo_create(struct ttm_bo_device *bdev,
1278 unsigned long size,
1279 enum ttm_bo_type type,
1280 struct ttm_placement *placement,
1281 uint32_t page_alignment,
1282 bool interruptible,
1283 struct ttm_buffer_object **p_bo)
1284 {
1285 struct ttm_buffer_object *bo;
1286 size_t acc_size;
1287 int ret;
1288
1289 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
1290 if (unlikely(bo == NULL))
1291 return -ENOMEM;
1292
1293 acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
1294 ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1295 interruptible, acc_size,
1296 NULL, NULL, NULL);
1297 if (likely(ret == 0))
1298 *p_bo = bo;
1299
1300 return ret;
1301 }
1302 EXPORT_SYMBOL(ttm_bo_create);
1303
1304 static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1305 unsigned mem_type)
1306 {
1307 struct ttm_operation_ctx ctx = {
1308 .interruptible = false,
1309 .no_wait_gpu = false,
1310 .flags = TTM_OPT_FLAG_FORCE_ALLOC
1311 };
1312 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1313 struct ttm_bo_global *glob = bdev->glob;
1314 struct dma_fence *fence;
1315 int ret;
1316 unsigned i;
1317
1318 /*
1319 * Can't use standard list traversal since we're unlocking.
1320 */
1321
1322 spin_lock(&glob->lru_lock);
1323 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
1324 while (!list_empty(&man->lru[i])) {
1325 spin_unlock(&glob->lru_lock);
1326 ret = ttm_mem_evict_first(bdev, mem_type, NULL, &ctx);
1327 if (ret)
1328 return ret;
1329 spin_lock(&glob->lru_lock);
1330 }
1331 }
1332 spin_unlock(&glob->lru_lock);
1333
1334 spin_lock(&man->move_lock);
1335 fence = dma_fence_get(man->move);
1336 spin_unlock(&man->move_lock);
1337
1338 if (fence) {
1339 ret = dma_fence_wait(fence, false);
1340 dma_fence_put(fence);
1341 if (ret)
1342 return ret;
1343 }
1344
1345 return 0;
1346 }
1347
1348 int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1349 {
1350 struct ttm_mem_type_manager *man;
1351 int ret = -EINVAL;
1352
1353 if (mem_type >= TTM_NUM_MEM_TYPES) {
1354 pr_err("Illegal memory type %d\n", mem_type);
1355 return ret;
1356 }
1357 man = &bdev->man[mem_type];
1358
1359 if (!man->has_type) {
1360 pr_err("Trying to take down uninitialized memory manager type %u\n",
1361 mem_type);
1362 return ret;
1363 }
1364
1365 man->use_type = false;
1366 man->has_type = false;
1367
1368 ret = 0;
1369 if (mem_type > 0) {
1370 ret = ttm_bo_force_list_clean(bdev, mem_type);
1371 if (ret) {
1372 pr_err("Cleanup eviction failed\n");
1373 return ret;
1374 }
1375
1376 ret = (*man->func->takedown)(man);
1377 }
1378
1379 dma_fence_put(man->move);
1380 man->move = NULL;
1381
1382 return ret;
1383 }
1384 EXPORT_SYMBOL(ttm_bo_clean_mm);
1385
1386 int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1387 {
1388 struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1389
1390 if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1391 pr_err("Illegal memory manager memory type %u\n", mem_type);
1392 return -EINVAL;
1393 }
1394
1395 if (!man->has_type) {
1396 pr_err("Memory type %u has not been initialized\n", mem_type);
1397 return 0;
1398 }
1399
1400 return ttm_bo_force_list_clean(bdev, mem_type);
1401 }
1402 EXPORT_SYMBOL(ttm_bo_evict_mm);
1403
1404 int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1405 unsigned long p_size)
1406 {
1407 int ret;
1408 struct ttm_mem_type_manager *man;
1409 unsigned i;
1410
1411 BUG_ON(type >= TTM_NUM_MEM_TYPES);
1412 man = &bdev->man[type];
1413 BUG_ON(man->has_type);
1414 man->io_reserve_fastpath = true;
1415 man->use_io_reserve_lru = false;
1416 mutex_init(&man->io_reserve_mutex);
1417 spin_lock_init(&man->move_lock);
1418 INIT_LIST_HEAD(&man->io_reserve_lru);
1419
1420 ret = bdev->driver->init_mem_type(bdev, type, man);
1421 if (ret)
1422 return ret;
1423 man->bdev = bdev;
1424
1425 if (type != TTM_PL_SYSTEM) {
1426 ret = (*man->func->init)(man, p_size);
1427 if (ret)
1428 return ret;
1429 }
1430 man->has_type = true;
1431 man->use_type = true;
1432 man->size = p_size;
1433
1434 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1435 INIT_LIST_HEAD(&man->lru[i]);
1436 man->move = NULL;
1437
1438 return 0;
1439 }
1440 EXPORT_SYMBOL(ttm_bo_init_mm);
1441
1442 static void ttm_bo_global_kobj_release(struct kobject *kobj)
1443 {
1444 struct ttm_bo_global *glob =
1445 container_of(kobj, struct ttm_bo_global, kobj);
1446
1447 __free_page(glob->dummy_read_page);
1448 }
1449
1450 void ttm_bo_global_release(struct drm_global_reference *ref)
1451 {
1452 struct ttm_bo_global *glob = ref->object;
1453
1454 kobject_del(&glob->kobj);
1455 kobject_put(&glob->kobj);
1456 }
1457 EXPORT_SYMBOL(ttm_bo_global_release);
1458
1459 int ttm_bo_global_init(struct drm_global_reference *ref)
1460 {
1461 struct ttm_bo_global_ref *bo_ref =
1462 container_of(ref, struct ttm_bo_global_ref, ref);
1463 struct ttm_bo_global *glob = ref->object;
1464 int ret;
1465 unsigned i;
1466
1467 mutex_init(&glob->device_list_mutex);
1468 spin_lock_init(&glob->lru_lock);
1469 glob->mem_glob = bo_ref->mem_glob;
1470 glob->mem_glob->bo_glob = glob;
1471 glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
1472
1473 if (unlikely(glob->dummy_read_page == NULL)) {
1474 ret = -ENOMEM;
1475 goto out_no_drp;
1476 }
1477
1478 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1479 INIT_LIST_HEAD(&glob->swap_lru[i]);
1480 INIT_LIST_HEAD(&glob->device_list);
1481 atomic_set(&glob->bo_count, 0);
1482
1483 ret = kobject_init_and_add(
1484 &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
1485 if (unlikely(ret != 0))
1486 kobject_put(&glob->kobj);
1487 return ret;
1488 out_no_drp:
1489 kfree(glob);
1490 return ret;
1491 }
1492 EXPORT_SYMBOL(ttm_bo_global_init);
1493
1494
1495 int ttm_bo_device_release(struct ttm_bo_device *bdev)
1496 {
1497 int ret = 0;
1498 unsigned i = TTM_NUM_MEM_TYPES;
1499 struct ttm_mem_type_manager *man;
1500 struct ttm_bo_global *glob = bdev->glob;
1501
1502 while (i--) {
1503 man = &bdev->man[i];
1504 if (man->has_type) {
1505 man->use_type = false;
1506 if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1507 ret = -EBUSY;
1508 pr_err("DRM memory manager type %d is not clean\n",
1509 i);
1510 }
1511 man->has_type = false;
1512 }
1513 }
1514
1515 mutex_lock(&glob->device_list_mutex);
1516 list_del(&bdev->device_list);
1517 mutex_unlock(&glob->device_list_mutex);
1518
1519 cancel_delayed_work_sync(&bdev->wq);
1520
1521 if (ttm_bo_delayed_delete(bdev, true))
1522 pr_debug("Delayed destroy list was clean\n");
1523
1524 spin_lock(&glob->lru_lock);
1525 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
1526 if (list_empty(&bdev->man[0].lru[0]))
1527 pr_debug("Swap list %d was clean\n", i);
1528 spin_unlock(&glob->lru_lock);
1529
1530 drm_vma_offset_manager_destroy(&bdev->vma_manager);
1531
1532 return ret;
1533 }
1534 EXPORT_SYMBOL(ttm_bo_device_release);
1535
1536 int ttm_bo_device_init(struct ttm_bo_device *bdev,
1537 struct ttm_bo_global *glob,
1538 struct ttm_bo_driver *driver,
1539 struct address_space *mapping,
1540 uint64_t file_page_offset,
1541 bool need_dma32)
1542 {
1543 int ret = -EINVAL;
1544
1545 bdev->driver = driver;
1546
1547 memset(bdev->man, 0, sizeof(bdev->man));
1548
1549 /*
1550 * Initialize the system memory buffer type.
1551 * Other types need to be driver / IOCTL initialized.
1552 */
1553 ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1554 if (unlikely(ret != 0))
1555 goto out_no_sys;
1556
1557 drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
1558 0x10000000);
1559 INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
1560 INIT_LIST_HEAD(&bdev->ddestroy);
1561 bdev->dev_mapping = mapping;
1562 bdev->glob = glob;
1563 bdev->need_dma32 = need_dma32;
1564 mutex_lock(&glob->device_list_mutex);
1565 list_add_tail(&bdev->device_list, &glob->device_list);
1566 mutex_unlock(&glob->device_list_mutex);
1567
1568 return 0;
1569 out_no_sys:
1570 return ret;
1571 }
1572 EXPORT_SYMBOL(ttm_bo_device_init);
1573
1574 /*
1575 * buffer object vm functions.
1576 */
1577
1578 bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1579 {
1580 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1581
1582 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1583 if (mem->mem_type == TTM_PL_SYSTEM)
1584 return false;
1585
1586 if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1587 return false;
1588
1589 if (mem->placement & TTM_PL_FLAG_CACHED)
1590 return false;
1591 }
1592 return true;
1593 }
1594
1595 void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1596 {
1597 struct ttm_bo_device *bdev = bo->bdev;
1598
1599 drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);
1600 ttm_mem_io_free_vm(bo);
1601 }
1602
1603 void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1604 {
1605 struct ttm_bo_device *bdev = bo->bdev;
1606 struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
1607
1608 ttm_mem_io_lock(man, false);
1609 ttm_bo_unmap_virtual_locked(bo);
1610 ttm_mem_io_unlock(man);
1611 }
1612
1613
1614 EXPORT_SYMBOL(ttm_bo_unmap_virtual);
1615
1616 int ttm_bo_wait(struct ttm_buffer_object *bo,
1617 bool interruptible, bool no_wait)
1618 {
1619 long timeout = 15 * HZ;
1620
1621 if (no_wait) {
1622 if (reservation_object_test_signaled_rcu(bo->resv, true))
1623 return 0;
1624 else
1625 return -EBUSY;
1626 }
1627
1628 timeout = reservation_object_wait_timeout_rcu(bo->resv, true,
1629 interruptible, timeout);
1630 if (timeout < 0)
1631 return timeout;
1632
1633 if (timeout == 0)
1634 return -EBUSY;
1635
1636 reservation_object_add_excl_fence(bo->resv, NULL);
1637 return 0;
1638 }
1639 EXPORT_SYMBOL(ttm_bo_wait);
1640
1641 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1642 {
1643 int ret = 0;
1644
1645 /*
1646 * Using ttm_bo_reserve makes sure the lru lists are updated.
1647 */
1648
1649 ret = ttm_bo_reserve(bo, true, no_wait, NULL);
1650 if (unlikely(ret != 0))
1651 return ret;
1652 ret = ttm_bo_wait(bo, true, no_wait);
1653 if (likely(ret == 0))
1654 atomic_inc(&bo->cpu_writers);
1655 ttm_bo_unreserve(bo);
1656 return ret;
1657 }
1658 EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
1659
1660 void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1661 {
1662 atomic_dec(&bo->cpu_writers);
1663 }
1664 EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
1665
1666 /**
1667 * A buffer object shrink method that tries to swap out the first
1668 * buffer object on the bo_global::swap_lru list.
1669 */
1670 int ttm_bo_swapout(struct ttm_bo_global *glob, struct ttm_operation_ctx *ctx)
1671 {
1672 struct ttm_buffer_object *bo;
1673 int ret = -EBUSY;
1674 bool locked;
1675 unsigned i;
1676
1677 spin_lock(&glob->lru_lock);
1678 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
1679 list_for_each_entry(bo, &glob->swap_lru[i], swap) {
1680 if (ttm_bo_evict_swapout_allowable(bo, ctx, &locked)) {
1681 ret = 0;
1682 break;
1683 }
1684 }
1685 if (!ret)
1686 break;
1687 }
1688
1689 if (ret) {
1690 spin_unlock(&glob->lru_lock);
1691 return ret;
1692 }
1693
1694 kref_get(&bo->list_kref);
1695
1696 if (!list_empty(&bo->ddestroy)) {
1697 ret = ttm_bo_cleanup_refs(bo, false, false, locked);
1698 kref_put(&bo->list_kref, ttm_bo_release_list);
1699 return ret;
1700 }
1701
1702 ttm_bo_del_from_lru(bo);
1703 spin_unlock(&glob->lru_lock);
1704
1705 /**
1706 * Move to system cached
1707 */
1708
1709 if (bo->mem.mem_type != TTM_PL_SYSTEM ||
1710 bo->ttm->caching_state != tt_cached) {
1711 struct ttm_operation_ctx ctx = { false, false };
1712 struct ttm_mem_reg evict_mem;
1713
1714 evict_mem = bo->mem;
1715 evict_mem.mm_node = NULL;
1716 evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1717 evict_mem.mem_type = TTM_PL_SYSTEM;
1718
1719 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, &ctx);
1720 if (unlikely(ret != 0))
1721 goto out;
1722 }
1723
1724 /**
1725 * Make sure BO is idle.
1726 */
1727
1728 ret = ttm_bo_wait(bo, false, false);
1729 if (unlikely(ret != 0))
1730 goto out;
1731
1732 ttm_bo_unmap_virtual(bo);
1733
1734 /**
1735 * Swap out. Buffer will be swapped in again as soon as
1736 * anyone tries to access a ttm page.
1737 */
1738
1739 if (bo->bdev->driver->swap_notify)
1740 bo->bdev->driver->swap_notify(bo);
1741
1742 ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
1743 out:
1744
1745 /**
1746 *
1747 * Unreserve without putting on LRU to avoid swapping out an
1748 * already swapped buffer.
1749 */
1750 if (locked)
1751 reservation_object_unlock(bo->resv);
1752 kref_put(&bo->list_kref, ttm_bo_release_list);
1753 return ret;
1754 }
1755 EXPORT_SYMBOL(ttm_bo_swapout);
1756
1757 void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1758 {
1759 struct ttm_operation_ctx ctx = {
1760 .interruptible = false,
1761 .no_wait_gpu = false
1762 };
1763
1764 while (ttm_bo_swapout(bdev->glob, &ctx) == 0)
1765 ;
1766 }
1767 EXPORT_SYMBOL(ttm_bo_swapout_all);
1768
1769 /**
1770 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1771 * unreserved
1772 *
1773 * @bo: Pointer to buffer
1774 */
1775 int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
1776 {
1777 int ret;
1778
1779 /*
1780 * In the absense of a wait_unlocked API,
1781 * Use the bo::wu_mutex to avoid triggering livelocks due to
1782 * concurrent use of this function. Note that this use of
1783 * bo::wu_mutex can go away if we change locking order to
1784 * mmap_sem -> bo::reserve.
1785 */
1786 ret = mutex_lock_interruptible(&bo->wu_mutex);
1787 if (unlikely(ret != 0))
1788 return -ERESTARTSYS;
1789 if (!ww_mutex_is_locked(&bo->resv->lock))
1790 goto out_unlock;
1791 ret = reservation_object_lock_interruptible(bo->resv, NULL);
1792 if (ret == -EINTR)
1793 ret = -ERESTARTSYS;
1794 if (unlikely(ret != 0))
1795 goto out_unlock;
1796 reservation_object_unlock(bo->resv);
1797
1798 out_unlock:
1799 mutex_unlock(&bo->wu_mutex);
1800 return ret;
1801 }
Linux with added FPC-III support