Line data Source code
1 : /**************************************************************************
2 : *
3 : * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
4 : * All Rights Reserved.
5 : *
6 : * Permission is hereby granted, free of charge, to any person obtaining a
7 : * copy of this software and associated documentation files (the
8 : * "Software"), to deal in the Software without restriction, including
9 : * without limitation the rights to use, copy, modify, merge, publish,
10 : * distribute, sub license, and/or sell copies of the Software, and to
11 : * permit persons to whom the Software is furnished to do so, subject to
12 : * the following conditions:
13 : *
14 : * The above copyright notice and this permission notice (including the
15 : * next paragraph) shall be included in all copies or substantial portions
16 : * of the Software.
17 : *
18 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 : * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 : * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 : * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 : * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 : * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 : *
26 : **************************************************************************/
27 : /*
28 : * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 : */
30 :
31 : #define pr_fmt(fmt) "[TTM] " fmt
32 :
33 : #include <dev/pci/drm/ttm/ttm_module.h>
34 : #include <dev/pci/drm/ttm/ttm_bo_driver.h>
35 : #include <dev/pci/drm/ttm/ttm_placement.h>
36 : #include <dev/pci/drm/drm_linux.h>
37 : #include <dev/pci/drm/drm_linux_atomic.h>
38 : #include <dev/pci/drm/linux_rcupdate.h>
39 : #include <dev/pci/drm/linux_ww_mutex.h>
40 :
41 : #define TTM_ASSERT_LOCKED(param)
42 : #define TTM_DEBUG(fmt, arg...)
43 : #define TTM_BO_HASH_ORDER 13
44 :
45 : static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
46 : static void ttm_bo_global_kobj_release(struct kobject *kobj);
47 :
48 : #ifdef notyet
49 : static struct attribute ttm_bo_count = {
50 : .name = "bo_count",
51 : .mode = S_IRUGO
52 : };
53 : #endif
54 :
55 : struct kobject *
56 0 : ttm_get_kobj(void)
57 : {
58 0 : return (NULL);
59 : }
60 :
61 0 : static inline int ttm_mem_type_from_place(const struct ttm_place *place,
62 : uint32_t *mem_type)
63 : {
64 : int i;
65 :
66 0 : for (i = 0; i <= TTM_PL_PRIV5; i++)
67 0 : if (place->flags & (1 << i)) {
68 0 : *mem_type = i;
69 0 : return 0;
70 : }
71 0 : return -EINVAL;
72 0 : }
73 :
74 0 : static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
75 : {
76 0 : struct ttm_mem_type_manager *man = &bdev->man[mem_type];
77 :
78 0 : pr_err(" has_type: %d\n", man->has_type);
79 0 : pr_err(" use_type: %d\n", man->use_type);
80 0 : pr_err(" flags: 0x%08X\n", man->flags);
81 0 : pr_err(" gpu_offset: 0x%08llX\n", man->gpu_offset);
82 0 : pr_err(" size: %llu\n", man->size);
83 0 : pr_err(" available_caching: 0x%08X\n", man->available_caching);
84 0 : pr_err(" default_caching: 0x%08X\n", man->default_caching);
85 0 : if (mem_type != TTM_PL_SYSTEM)
86 0 : (*man->func->debug)(man, TTM_PFX);
87 0 : }
88 :
89 0 : static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
90 : struct ttm_placement *placement)
91 : {
92 0 : int i, ret, mem_type;
93 :
94 0 : pr_err("No space for %p (%lu pages, %luK, %luM)\n",
95 : bo, bo->mem.num_pages, bo->mem.size >> 10,
96 : bo->mem.size >> 20);
97 0 : for (i = 0; i < placement->num_placement; i++) {
98 0 : ret = ttm_mem_type_from_place(&placement->placement[i],
99 : &mem_type);
100 0 : if (ret)
101 0 : return;
102 0 : pr_err(" placement[%d]=0x%08X (%d)\n",
103 : i, placement->placement[i].flags, mem_type);
104 0 : ttm_mem_type_debug(bo->bdev, mem_type);
105 : }
106 0 : }
107 :
108 : #ifdef notyet
109 : static ssize_t ttm_bo_global_show(struct kobject *kobj,
110 : struct attribute *attr,
111 : char *buffer)
112 : {
113 : struct ttm_bo_global *glob =
114 : container_of(kobj, struct ttm_bo_global, kobj);
115 :
116 : return snprintf(buffer, PAGE_SIZE, "%lu\n",
117 : (unsigned long) atomic_read(&glob->bo_count));
118 : }
119 :
120 : static struct attribute *ttm_bo_global_attrs[] = {
121 : &ttm_bo_count,
122 : NULL
123 : };
124 :
125 : static const struct sysfs_ops ttm_bo_global_ops = {
126 : .show = &ttm_bo_global_show
127 : };
128 : #endif
129 :
130 : static struct kobj_type ttm_bo_glob_kobj_type = {
131 : .release = &ttm_bo_global_kobj_release,
132 : #ifdef __linux__
133 : .sysfs_ops = &ttm_bo_global_ops,
134 : .default_attrs = ttm_bo_global_attrs
135 : #endif
136 : };
137 :
138 :
139 0 : static inline uint32_t ttm_bo_type_flags(unsigned type)
140 : {
141 0 : return 1 << (type);
142 : }
143 :
144 0 : static void ttm_bo_release_list(struct kref *list_kref)
145 : {
146 : struct ttm_buffer_object *bo =
147 0 : container_of(list_kref, struct ttm_buffer_object, list_kref);
148 0 : struct ttm_bo_device *bdev = bo->bdev;
149 0 : size_t acc_size = bo->acc_size;
150 :
151 0 : BUG_ON(atomic_read(&bo->list_kref.refcount));
152 0 : BUG_ON(atomic_read(&bo->kref.refcount));
153 0 : BUG_ON(atomic_read(&bo->cpu_writers));
154 0 : BUG_ON(bo->mem.mm_node != NULL);
155 0 : BUG_ON(!list_empty(&bo->lru));
156 0 : BUG_ON(!list_empty(&bo->ddestroy));
157 :
158 0 : if (bo->ttm)
159 0 : ttm_tt_destroy(bo->ttm);
160 0 : atomic_dec(&bo->glob->bo_count);
161 0 : if (bo->resv == &bo->ttm_resv)
162 0 : reservation_object_fini(&bo->ttm_resv);
163 : mutex_destroy(&bo->wu_mutex);
164 0 : if (bo->destroy)
165 0 : bo->destroy(bo);
166 : else {
167 0 : kfree(bo);
168 : }
169 0 : ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
170 0 : }
171 :
172 0 : void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
173 : {
174 0 : struct ttm_bo_device *bdev = bo->bdev;
175 : struct ttm_mem_type_manager *man;
176 :
177 : #ifdef notyet
178 : lockdep_assert_held(&bo->resv->lock.base);
179 : #endif
180 :
181 0 : if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
182 :
183 0 : BUG_ON(!list_empty(&bo->lru));
184 :
185 0 : man = &bdev->man[bo->mem.mem_type];
186 0 : list_add_tail(&bo->lru, &man->lru);
187 0 : kref_get(&bo->list_kref);
188 :
189 0 : if (bo->ttm != NULL) {
190 0 : list_add_tail(&bo->swap, &bo->glob->swap_lru);
191 0 : kref_get(&bo->list_kref);
192 0 : }
193 : }
194 0 : }
195 : EXPORT_SYMBOL(ttm_bo_add_to_lru);
196 :
197 0 : int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
198 : {
199 : int put_count = 0;
200 :
201 0 : if (!list_empty(&bo->swap)) {
202 0 : list_del_init(&bo->swap);
203 : ++put_count;
204 0 : }
205 0 : if (!list_empty(&bo->lru)) {
206 0 : list_del_init(&bo->lru);
207 0 : ++put_count;
208 0 : }
209 :
210 : /*
211 : * TODO: Add a driver hook to delete from
212 : * driver-specific LRU's here.
213 : */
214 :
215 0 : return put_count;
216 : }
217 :
218 0 : static void ttm_bo_ref_bug(struct kref *list_kref)
219 : {
220 0 : BUG();
221 : }
222 :
223 0 : void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
224 : bool never_free)
225 : {
226 0 : kref_sub(&bo->list_kref, count,
227 0 : (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list);
228 0 : }
229 :
230 0 : void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
231 : {
232 : int put_count;
233 :
234 0 : spin_lock(&bo->glob->lru_lock);
235 0 : put_count = ttm_bo_del_from_lru(bo);
236 0 : spin_unlock(&bo->glob->lru_lock);
237 0 : ttm_bo_list_ref_sub(bo, put_count, true);
238 0 : }
239 : EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
240 :
241 : /*
242 : * Call bo->mutex locked.
243 : */
244 0 : static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
245 : {
246 0 : struct ttm_bo_device *bdev = bo->bdev;
247 0 : struct ttm_bo_global *glob = bo->glob;
248 : int ret = 0;
249 : uint32_t page_flags = 0;
250 :
251 : TTM_ASSERT_LOCKED(&bo->mutex);
252 0 : bo->ttm = NULL;
253 :
254 0 : if (bdev->need_dma32)
255 0 : page_flags |= TTM_PAGE_FLAG_DMA32;
256 :
257 0 : switch (bo->type) {
258 : case ttm_bo_type_device:
259 0 : if (zero_alloc)
260 0 : page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
261 : case ttm_bo_type_kernel:
262 0 : bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
263 0 : page_flags, glob->dummy_read_page);
264 0 : if (unlikely(bo->ttm == NULL))
265 0 : ret = -ENOMEM;
266 : break;
267 : case ttm_bo_type_sg:
268 0 : bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
269 0 : page_flags | TTM_PAGE_FLAG_SG,
270 0 : glob->dummy_read_page);
271 0 : if (unlikely(bo->ttm == NULL)) {
272 : ret = -ENOMEM;
273 0 : break;
274 : }
275 0 : bo->ttm->sg = bo->sg;
276 0 : break;
277 : default:
278 0 : pr_err("Illegal buffer object type\n");
279 : ret = -EINVAL;
280 0 : break;
281 : }
282 :
283 0 : return ret;
284 : }
285 :
286 0 : static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
287 : struct ttm_mem_reg *mem,
288 : bool evict, bool interruptible,
289 : bool no_wait_gpu)
290 : {
291 0 : struct ttm_bo_device *bdev = bo->bdev;
292 0 : bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
293 0 : bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
294 0 : struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
295 0 : struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
296 : int ret = 0;
297 :
298 0 : if (old_is_pci || new_is_pci ||
299 0 : ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
300 0 : ret = ttm_mem_io_lock(old_man, true);
301 0 : if (unlikely(ret != 0))
302 : goto out_err;
303 0 : ttm_bo_unmap_virtual_locked(bo);
304 0 : ttm_mem_io_unlock(old_man);
305 0 : }
306 :
307 : /*
308 : * Create and bind a ttm if required.
309 : */
310 :
311 0 : if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
312 0 : if (bo->ttm == NULL) {
313 0 : bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
314 0 : ret = ttm_bo_add_ttm(bo, zero);
315 0 : if (ret)
316 0 : goto out_err;
317 0 : }
318 :
319 0 : ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
320 0 : if (ret)
321 : goto out_err;
322 :
323 0 : if (mem->mem_type != TTM_PL_SYSTEM) {
324 0 : ret = ttm_tt_bind(bo->ttm, mem);
325 0 : if (ret)
326 : goto out_err;
327 : }
328 :
329 0 : if (bo->mem.mem_type == TTM_PL_SYSTEM) {
330 0 : if (bdev->driver->move_notify)
331 0 : bdev->driver->move_notify(bo, mem);
332 0 : bo->mem = *mem;
333 0 : mem->mm_node = NULL;
334 0 : goto moved;
335 : }
336 : }
337 :
338 0 : if (bdev->driver->move_notify)
339 0 : bdev->driver->move_notify(bo, mem);
340 :
341 0 : if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
342 0 : !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
343 0 : ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem);
344 0 : else if (bdev->driver->move)
345 0 : ret = bdev->driver->move(bo, evict, interruptible,
346 : no_wait_gpu, mem);
347 : else
348 0 : ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem);
349 :
350 0 : if (ret) {
351 0 : if (bdev->driver->move_notify) {
352 0 : struct ttm_mem_reg tmp_mem = *mem;
353 0 : *mem = bo->mem;
354 0 : bo->mem = tmp_mem;
355 0 : bdev->driver->move_notify(bo, mem);
356 0 : bo->mem = *mem;
357 0 : *mem = tmp_mem;
358 0 : }
359 :
360 : goto out_err;
361 : }
362 :
363 : moved:
364 0 : if (bo->evicted) {
365 0 : if (bdev->driver->invalidate_caches) {
366 0 : ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
367 0 : if (ret)
368 0 : pr_err("Can not flush read caches\n");
369 : }
370 0 : bo->evicted = false;
371 0 : }
372 :
373 0 : if (bo->mem.mm_node) {
374 0 : bo->offset = (bo->mem.start << PAGE_SHIFT) +
375 0 : bdev->man[bo->mem.mem_type].gpu_offset;
376 0 : bo->cur_placement = bo->mem.placement;
377 0 : } else
378 0 : bo->offset = 0;
379 :
380 0 : return 0;
381 :
382 : out_err:
383 0 : new_man = &bdev->man[bo->mem.mem_type];
384 0 : if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
385 0 : ttm_tt_unbind(bo->ttm);
386 0 : ttm_tt_destroy(bo->ttm);
387 0 : bo->ttm = NULL;
388 0 : }
389 :
390 0 : return ret;
391 0 : }
392 :
393 : /**
394 : * Call bo::reserved.
395 : * Will release GPU memory type usage on destruction.
396 : * This is the place to put in driver specific hooks to release
397 : * driver private resources.
398 : * Will release the bo::reserved lock.
399 : */
400 :
401 0 : static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
402 : {
403 0 : if (bo->bdev->driver->move_notify)
404 0 : bo->bdev->driver->move_notify(bo, NULL);
405 :
406 0 : if (bo->ttm) {
407 0 : ttm_tt_unbind(bo->ttm);
408 0 : ttm_tt_destroy(bo->ttm);
409 0 : bo->ttm = NULL;
410 0 : }
411 0 : ttm_bo_mem_put(bo, &bo->mem);
412 :
413 0 : ww_mutex_unlock (&bo->resv->lock);
414 0 : }
415 :
416 0 : static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
417 : {
418 : struct reservation_object_list *fobj;
419 : struct fence *fence;
420 : int i;
421 :
422 0 : fobj = reservation_object_get_list(bo->resv);
423 0 : fence = reservation_object_get_excl(bo->resv);
424 0 : if (fence && !fence->ops->signaled)
425 0 : fence_enable_sw_signaling(fence);
426 :
427 0 : for (i = 0; fobj && i < fobj->shared_count; ++i) {
428 0 : fence = rcu_dereference_protected(fobj->shared[i],
429 : reservation_object_held(bo->resv));
430 :
431 0 : if (!fence->ops->signaled)
432 0 : fence_enable_sw_signaling(fence);
433 : }
434 0 : }
435 :
436 0 : static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
437 : {
438 0 : struct ttm_bo_device *bdev = bo->bdev;
439 0 : struct ttm_bo_global *glob = bo->glob;
440 : int put_count;
441 : int ret;
442 :
443 0 : spin_lock(&glob->lru_lock);
444 0 : ret = __ttm_bo_reserve(bo, false, true, false, NULL);
445 :
446 0 : if (!ret) {
447 0 : if (!ttm_bo_wait(bo, false, false, true)) {
448 0 : put_count = ttm_bo_del_from_lru(bo);
449 :
450 0 : spin_unlock(&glob->lru_lock);
451 0 : ttm_bo_cleanup_memtype_use(bo);
452 :
453 0 : ttm_bo_list_ref_sub(bo, put_count, true);
454 :
455 0 : return;
456 : } else
457 0 : ttm_bo_flush_all_fences(bo);
458 :
459 : /*
460 : * Make NO_EVICT bos immediately available to
461 : * shrinkers, now that they are queued for
462 : * destruction.
463 : */
464 0 : if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
465 0 : bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT;
466 0 : ttm_bo_add_to_lru(bo);
467 0 : }
468 :
469 0 : __ttm_bo_unreserve(bo);
470 0 : }
471 :
472 0 : kref_get(&bo->list_kref);
473 0 : list_add_tail(&bo->ddestroy, &bdev->ddestroy);
474 0 : spin_unlock(&glob->lru_lock);
475 :
476 0 : schedule_delayed_work(&bdev->wq,
477 0 : ((HZ / 100) < 1) ? 1 : HZ / 100);
478 0 : }
479 :
480 : /**
481 : * function ttm_bo_cleanup_refs_and_unlock
482 : * If bo idle, remove from delayed- and lru lists, and unref.
483 : * If not idle, do nothing.
484 : *
485 : * Must be called with lru_lock and reservation held, this function
486 : * will drop both before returning.
487 : *
488 : * @interruptible Any sleeps should occur interruptibly.
489 : * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
490 : */
491 :
492 0 : static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
493 : bool interruptible,
494 : bool no_wait_gpu)
495 : {
496 0 : struct ttm_bo_global *glob = bo->glob;
497 : int put_count;
498 : int ret;
499 :
500 0 : ret = ttm_bo_wait(bo, false, false, true);
501 :
502 0 : if (ret && !no_wait_gpu) {
503 : long lret;
504 0 : ww_mutex_unlock(&bo->resv->lock);
505 0 : spin_unlock(&glob->lru_lock);
506 :
507 0 : lret = reservation_object_wait_timeout_rcu(bo->resv,
508 : true,
509 : interruptible,
510 0 : 30 * HZ);
511 :
512 0 : if (lret < 0)
513 0 : return lret;
514 0 : else if (lret == 0)
515 0 : return -EBUSY;
516 :
517 0 : spin_lock(&glob->lru_lock);
518 0 : ret = __ttm_bo_reserve(bo, false, true, false, NULL);
519 :
520 : /*
521 : * We raced, and lost, someone else holds the reservation now,
522 : * and is probably busy in ttm_bo_cleanup_memtype_use.
523 : *
524 : * Even if it's not the case, because we finished waiting any
525 : * delayed destruction would succeed, so just return success
526 : * here.
527 : */
528 0 : if (ret) {
529 0 : spin_unlock(&glob->lru_lock);
530 0 : return 0;
531 : }
532 :
533 : /*
534 : * remove sync_obj with ttm_bo_wait, the wait should be
535 : * finished, and no new wait object should have been added.
536 : */
537 0 : ret = ttm_bo_wait(bo, false, false, true);
538 0 : WARN_ON(ret);
539 0 : }
540 :
541 0 : if (ret || unlikely(list_empty(&bo->ddestroy))) {
542 0 : __ttm_bo_unreserve(bo);
543 0 : spin_unlock(&glob->lru_lock);
544 0 : return ret;
545 : }
546 :
547 0 : put_count = ttm_bo_del_from_lru(bo);
548 0 : list_del_init(&bo->ddestroy);
549 0 : ++put_count;
550 :
551 0 : spin_unlock(&glob->lru_lock);
552 0 : ttm_bo_cleanup_memtype_use(bo);
553 :
554 0 : ttm_bo_list_ref_sub(bo, put_count, true);
555 :
556 0 : return 0;
557 0 : }
558 :
559 : /**
560 : * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
561 : * encountered buffers.
562 : */
563 :
564 0 : static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
565 : {
566 0 : struct ttm_bo_global *glob = bdev->glob;
567 : struct ttm_buffer_object *entry = NULL;
568 : int ret = 0;
569 :
570 0 : spin_lock(&glob->lru_lock);
571 0 : if (list_empty(&bdev->ddestroy))
572 : goto out_unlock;
573 :
574 0 : entry = list_first_entry(&bdev->ddestroy,
575 : struct ttm_buffer_object, ddestroy);
576 0 : kref_get(&entry->list_kref);
577 :
578 0 : for (;;) {
579 : struct ttm_buffer_object *nentry = NULL;
580 :
581 0 : if (entry->ddestroy.next != &bdev->ddestroy) {
582 0 : nentry = list_first_entry(&entry->ddestroy,
583 : struct ttm_buffer_object, ddestroy);
584 0 : kref_get(&nentry->list_kref);
585 0 : }
586 :
587 0 : ret = __ttm_bo_reserve(entry, false, true, false, NULL);
588 0 : if (remove_all && ret) {
589 0 : spin_unlock(&glob->lru_lock);
590 0 : ret = __ttm_bo_reserve(entry, false, false,
591 : false, NULL);
592 0 : spin_lock(&glob->lru_lock);
593 0 : }
594 :
595 0 : if (!ret)
596 0 : ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
597 0 : !remove_all);
598 : else
599 0 : spin_unlock(&glob->lru_lock);
600 :
601 0 : kref_put(&entry->list_kref, ttm_bo_release_list);
602 : entry = nentry;
603 :
604 0 : if (ret || !entry)
605 0 : goto out;
606 :
607 0 : spin_lock(&glob->lru_lock);
608 0 : if (list_empty(&entry->ddestroy))
609 0 : break;
610 0 : }
611 :
612 : out_unlock:
613 0 : spin_unlock(&glob->lru_lock);
614 : out:
615 0 : if (entry)
616 0 : kref_put(&entry->list_kref, ttm_bo_release_list);
617 0 : return ret;
618 0 : }
619 :
620 0 : static void ttm_bo_delayed_workqueue(struct work_struct *work)
621 : {
622 : struct ttm_bo_device *bdev =
623 0 : container_of(work, struct ttm_bo_device, wq.work);
624 :
625 0 : if (ttm_bo_delayed_delete(bdev, false)) {
626 0 : schedule_delayed_work(&bdev->wq,
627 0 : ((HZ / 100) < 1) ? 1 : HZ / 100);
628 0 : }
629 0 : }
630 :
631 0 : static void ttm_bo_release(struct kref *kref)
632 : {
633 : struct ttm_buffer_object *bo =
634 0 : container_of(kref, struct ttm_buffer_object, kref);
635 0 : struct ttm_bo_device *bdev = bo->bdev;
636 0 : struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
637 :
638 0 : drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
639 0 : ttm_mem_io_lock(man, false);
640 0 : ttm_mem_io_free_vm(bo);
641 0 : ttm_mem_io_unlock(man);
642 0 : ttm_bo_cleanup_refs_or_queue(bo);
643 0 : kref_put(&bo->list_kref, ttm_bo_release_list);
644 0 : }
645 :
646 0 : void ttm_bo_unref(struct ttm_buffer_object **p_bo)
647 : {
648 0 : struct ttm_buffer_object *bo = *p_bo;
649 :
650 0 : *p_bo = NULL;
651 0 : kref_put(&bo->kref, ttm_bo_release);
652 0 : }
653 : EXPORT_SYMBOL(ttm_bo_unref);
654 :
655 0 : int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
656 : {
657 0 : return cancel_delayed_work_sync(&bdev->wq);
658 : }
659 : EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
660 :
661 0 : void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
662 : {
663 0 : if (resched)
664 0 : schedule_delayed_work(&bdev->wq,
665 0 : ((HZ / 100) < 1) ? 1 : HZ / 100);
666 0 : }
667 : EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
668 :
669 0 : static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
670 : bool no_wait_gpu)
671 : {
672 0 : struct ttm_bo_device *bdev = bo->bdev;
673 0 : struct ttm_mem_reg evict_mem;
674 0 : struct ttm_placement placement;
675 : int ret = 0;
676 :
677 0 : ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
678 :
679 0 : if (unlikely(ret != 0)) {
680 0 : if (ret != -ERESTARTSYS) {
681 0 : pr_err("Failed to expire sync object before buffer eviction\n");
682 0 : }
683 : goto out;
684 : }
685 :
686 : #ifdef notyet
687 : lockdep_assert_held(&bo->resv->lock.base);
688 : #endif
689 :
690 0 : evict_mem = bo->mem;
691 0 : evict_mem.mm_node = NULL;
692 0 : evict_mem.bus.io_reserved_vm = false;
693 0 : evict_mem.bus.io_reserved_count = 0;
694 :
695 0 : placement.num_placement = 0;
696 0 : placement.num_busy_placement = 0;
697 0 : bdev->driver->evict_flags(bo, &placement);
698 0 : ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
699 : no_wait_gpu);
700 0 : if (ret) {
701 0 : if (ret != -ERESTARTSYS) {
702 0 : pr_err("Failed to find memory space for buffer 0x%p eviction\n",
703 : bo);
704 0 : ttm_bo_mem_space_debug(bo, &placement);
705 0 : }
706 : goto out;
707 : }
708 :
709 0 : ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
710 : no_wait_gpu);
711 0 : if (ret) {
712 0 : if (ret != -ERESTARTSYS)
713 0 : pr_err("Buffer eviction failed\n");
714 0 : ttm_bo_mem_put(bo, &evict_mem);
715 0 : goto out;
716 : }
717 0 : bo->evicted = true;
718 : out:
719 0 : return ret;
720 0 : }
721 :
722 0 : static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
723 : uint32_t mem_type,
724 : const struct ttm_place *place,
725 : bool interruptible,
726 : bool no_wait_gpu)
727 : {
728 0 : struct ttm_bo_global *glob = bdev->glob;
729 0 : struct ttm_mem_type_manager *man = &bdev->man[mem_type];
730 : struct ttm_buffer_object *bo;
731 : int ret = -EBUSY, put_count;
732 :
733 0 : spin_lock(&glob->lru_lock);
734 0 : list_for_each_entry(bo, &man->lru, lru) {
735 0 : ret = __ttm_bo_reserve(bo, false, true, false, NULL);
736 0 : if (!ret) {
737 0 : if (place && (place->fpfn || place->lpfn)) {
738 : /* Don't evict this BO if it's outside of the
739 : * requested placement range
740 : */
741 0 : if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
742 0 : (place->lpfn && place->lpfn <= bo->mem.start)) {
743 0 : __ttm_bo_unreserve(bo);
744 : ret = -EBUSY;
745 0 : continue;
746 : }
747 : }
748 :
749 : break;
750 : }
751 : }
752 :
753 0 : if (ret) {
754 0 : spin_unlock(&glob->lru_lock);
755 0 : return ret;
756 : }
757 :
758 0 : kref_get(&bo->list_kref);
759 :
760 0 : if (!list_empty(&bo->ddestroy)) {
761 0 : ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible,
762 : no_wait_gpu);
763 0 : kref_put(&bo->list_kref, ttm_bo_release_list);
764 0 : return ret;
765 : }
766 :
767 0 : put_count = ttm_bo_del_from_lru(bo);
768 0 : spin_unlock(&glob->lru_lock);
769 :
770 0 : BUG_ON(ret != 0);
771 :
772 0 : ttm_bo_list_ref_sub(bo, put_count, true);
773 :
774 0 : ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
775 0 : ttm_bo_unreserve(bo);
776 :
777 0 : kref_put(&bo->list_kref, ttm_bo_release_list);
778 0 : return ret;
779 0 : }
780 :
781 0 : void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
782 : {
783 0 : struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
784 :
785 0 : if (mem->mm_node)
786 0 : (*man->func->put_node)(man, mem);
787 0 : }
788 : EXPORT_SYMBOL(ttm_bo_mem_put);
789 :
790 : /**
791 : * Repeatedly evict memory from the LRU for @mem_type until we create enough
792 : * space, or we've evicted everything and there isn't enough space.
793 : */
794 0 : static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
795 : uint32_t mem_type,
796 : const struct ttm_place *place,
797 : struct ttm_mem_reg *mem,
798 : bool interruptible,
799 : bool no_wait_gpu)
800 : {
801 0 : struct ttm_bo_device *bdev = bo->bdev;
802 0 : struct ttm_mem_type_manager *man = &bdev->man[mem_type];
803 : int ret;
804 :
805 0 : do {
806 0 : ret = (*man->func->get_node)(man, bo, place, mem);
807 0 : if (unlikely(ret != 0))
808 0 : return ret;
809 0 : if (mem->mm_node)
810 : break;
811 0 : ret = ttm_mem_evict_first(bdev, mem_type, place,
812 : interruptible, no_wait_gpu);
813 0 : if (unlikely(ret != 0))
814 0 : return ret;
815 0 : } while (1);
816 0 : if (mem->mm_node == NULL)
817 0 : return -ENOMEM;
818 0 : mem->mem_type = mem_type;
819 0 : return 0;
820 0 : }
821 :
822 0 : static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
823 : uint32_t cur_placement,
824 : uint32_t proposed_placement)
825 : {
826 0 : uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
827 0 : uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
828 :
829 : /**
830 : * Keep current caching if possible.
831 : */
832 :
833 0 : if ((cur_placement & caching) != 0)
834 0 : result |= (cur_placement & caching);
835 0 : else if ((man->default_caching & caching) != 0)
836 0 : result |= man->default_caching;
837 0 : else if ((TTM_PL_FLAG_CACHED & caching) != 0)
838 0 : result |= TTM_PL_FLAG_CACHED;
839 0 : else if ((TTM_PL_FLAG_WC & caching) != 0)
840 0 : result |= TTM_PL_FLAG_WC;
841 0 : else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
842 0 : result |= TTM_PL_FLAG_UNCACHED;
843 :
844 0 : return result;
845 : }
846 :
847 0 : static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
848 : uint32_t mem_type,
849 : const struct ttm_place *place,
850 : uint32_t *masked_placement)
851 : {
852 0 : uint32_t cur_flags = ttm_bo_type_flags(mem_type);
853 :
854 0 : if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0)
855 0 : return false;
856 :
857 0 : if ((place->flags & man->available_caching) == 0)
858 0 : return false;
859 :
860 0 : cur_flags |= (place->flags & man->available_caching);
861 :
862 0 : *masked_placement = cur_flags;
863 0 : return true;
864 0 : }
865 :
866 : /**
867 : * Creates space for memory region @mem according to its type.
868 : *
869 : * This function first searches for free space in compatible memory types in
870 : * the priority order defined by the driver. If free space isn't found, then
871 : * ttm_bo_mem_force_space is attempted in priority order to evict and find
872 : * space.
873 : */
874 0 : int ttm_bo_mem_space(struct ttm_buffer_object *bo,
875 : struct ttm_placement *placement,
876 : struct ttm_mem_reg *mem,
877 : bool interruptible,
878 : bool no_wait_gpu)
879 : {
880 0 : struct ttm_bo_device *bdev = bo->bdev;
881 : struct ttm_mem_type_manager *man;
882 0 : uint32_t mem_type = TTM_PL_SYSTEM;
883 0 : uint32_t cur_flags = 0;
884 : bool type_found = false;
885 : bool type_ok = false;
886 : bool has_erestartsys = false;
887 : int i, ret;
888 :
889 0 : mem->mm_node = NULL;
890 0 : for (i = 0; i < placement->num_placement; ++i) {
891 0 : const struct ttm_place *place = &placement->placement[i];
892 :
893 0 : ret = ttm_mem_type_from_place(place, &mem_type);
894 0 : if (ret)
895 0 : return ret;
896 0 : man = &bdev->man[mem_type];
897 0 : if (!man->has_type || !man->use_type)
898 0 : continue;
899 :
900 0 : type_ok = ttm_bo_mt_compatible(man, mem_type, place,
901 : &cur_flags);
902 :
903 0 : if (!type_ok)
904 0 : continue;
905 :
906 : type_found = true;
907 0 : cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
908 0 : cur_flags);
909 : /*
910 : * Use the access and other non-mapping-related flag bits from
911 : * the memory placement flags to the current flags
912 : */
913 0 : ttm_flag_masked(&cur_flags, place->flags,
914 : ~TTM_PL_MASK_MEMTYPE);
915 :
916 0 : if (mem_type == TTM_PL_SYSTEM)
917 0 : break;
918 :
919 0 : ret = (*man->func->get_node)(man, bo, place, mem);
920 0 : if (unlikely(ret))
921 0 : return ret;
922 :
923 0 : if (mem->mm_node)
924 0 : break;
925 0 : }
926 :
927 0 : if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
928 0 : mem->mem_type = mem_type;
929 0 : mem->placement = cur_flags;
930 0 : return 0;
931 : }
932 :
933 0 : for (i = 0; i < placement->num_busy_placement; ++i) {
934 0 : const struct ttm_place *place = &placement->busy_placement[i];
935 :
936 0 : ret = ttm_mem_type_from_place(place, &mem_type);
937 0 : if (ret)
938 0 : return ret;
939 0 : man = &bdev->man[mem_type];
940 0 : if (!man->has_type || !man->use_type)
941 0 : continue;
942 0 : if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
943 0 : continue;
944 :
945 : type_found = true;
946 0 : cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
947 0 : cur_flags);
948 : /*
949 : * Use the access and other non-mapping-related flag bits from
950 : * the memory placement flags to the current flags
951 : */
952 0 : ttm_flag_masked(&cur_flags, place->flags,
953 : ~TTM_PL_MASK_MEMTYPE);
954 :
955 0 : if (mem_type == TTM_PL_SYSTEM) {
956 0 : mem->mem_type = mem_type;
957 0 : mem->placement = cur_flags;
958 0 : mem->mm_node = NULL;
959 0 : return 0;
960 : }
961 :
962 0 : ret = ttm_bo_mem_force_space(bo, mem_type, place, mem,
963 : interruptible, no_wait_gpu);
964 0 : if (ret == 0 && mem->mm_node) {
965 0 : mem->placement = cur_flags;
966 0 : return 0;
967 : }
968 0 : if (ret == -ERESTARTSYS)
969 0 : has_erestartsys = true;
970 0 : }
971 :
972 0 : if (!type_found) {
973 0 : printk(KERN_ERR TTM_PFX "No compatible memory type found.\n");
974 0 : return -EINVAL;
975 : }
976 :
977 0 : return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
978 0 : }
979 : EXPORT_SYMBOL(ttm_bo_mem_space);
980 :
981 0 : static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
982 : struct ttm_placement *placement,
983 : bool interruptible,
984 : bool no_wait_gpu)
985 : {
986 : int ret = 0;
987 0 : struct ttm_mem_reg mem;
988 :
989 : #ifdef notyet
990 : lockdep_assert_held(&bo->resv->lock.base);
991 : #endif
992 :
993 : /*
994 : * FIXME: It's possible to pipeline buffer moves.
995 : * Have the driver move function wait for idle when necessary,
996 : * instead of doing it here.
997 : */
998 0 : ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
999 0 : if (ret)
1000 0 : return ret;
1001 0 : mem.num_pages = bo->num_pages;
1002 0 : mem.size = mem.num_pages << PAGE_SHIFT;
1003 0 : mem.page_alignment = bo->mem.page_alignment;
1004 0 : mem.bus.io_reserved_vm = false;
1005 0 : mem.bus.io_reserved_count = 0;
1006 : /*
1007 : * Determine where to move the buffer.
1008 : */
1009 0 : ret = ttm_bo_mem_space(bo, placement, &mem,
1010 : interruptible, no_wait_gpu);
1011 0 : if (ret)
1012 : goto out_unlock;
1013 0 : ret = ttm_bo_handle_move_mem(bo, &mem, false,
1014 : interruptible, no_wait_gpu);
1015 : out_unlock:
1016 0 : if (ret && mem.mm_node)
1017 0 : ttm_bo_mem_put(bo, &mem);
1018 0 : return ret;
1019 0 : }
1020 :
1021 0 : bool ttm_bo_mem_compat(struct ttm_placement *placement,
1022 : struct ttm_mem_reg *mem,
1023 : uint32_t *new_flags)
1024 : {
1025 : int i;
1026 :
1027 0 : for (i = 0; i < placement->num_placement; i++) {
1028 0 : const struct ttm_place *heap = &placement->placement[i];
1029 0 : if (mem->mm_node &&
1030 0 : (mem->start < heap->fpfn ||
1031 0 : (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
1032 0 : continue;
1033 :
1034 0 : *new_flags = heap->flags;
1035 0 : if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
1036 0 : (*new_flags & mem->placement & TTM_PL_MASK_MEM))
1037 0 : return true;
1038 0 : }
1039 :
1040 0 : for (i = 0; i < placement->num_busy_placement; i++) {
1041 0 : const struct ttm_place *heap = &placement->busy_placement[i];
1042 0 : if (mem->mm_node &&
1043 0 : (mem->start < heap->fpfn ||
1044 0 : (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
1045 0 : continue;
1046 :
1047 0 : *new_flags = heap->flags;
1048 0 : if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
1049 0 : (*new_flags & mem->placement & TTM_PL_MASK_MEM))
1050 0 : return true;
1051 0 : }
1052 :
1053 0 : return false;
1054 0 : }
1055 : EXPORT_SYMBOL(ttm_bo_mem_compat);
1056 :
1057 0 : int ttm_bo_validate(struct ttm_buffer_object *bo,
1058 : struct ttm_placement *placement,
1059 : bool interruptible,
1060 : bool no_wait_gpu)
1061 : {
1062 : int ret;
1063 0 : uint32_t new_flags;
1064 :
1065 : #ifdef notyet
1066 : lockdep_assert_held(&bo->resv->lock.base);
1067 : #endif
1068 : /*
1069 : * Check whether we need to move buffer.
1070 : */
1071 0 : if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
1072 0 : ret = ttm_bo_move_buffer(bo, placement, interruptible,
1073 : no_wait_gpu);
1074 0 : if (ret)
1075 0 : return ret;
1076 : } else {
1077 : /*
1078 : * Use the access and other non-mapping-related flag bits from
1079 : * the compatible memory placement flags to the active flags
1080 : */
1081 0 : ttm_flag_masked(&bo->mem.placement, new_flags,
1082 : ~TTM_PL_MASK_MEMTYPE);
1083 : }
1084 : /*
1085 : * We might need to add a TTM.
1086 : */
1087 0 : if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
1088 0 : ret = ttm_bo_add_ttm(bo, true);
1089 0 : if (ret)
1090 0 : return ret;
1091 : }
1092 0 : return 0;
1093 0 : }
1094 : EXPORT_SYMBOL(ttm_bo_validate);
1095 :
1096 0 : int ttm_bo_init(struct ttm_bo_device *bdev,
1097 : struct ttm_buffer_object *bo,
1098 : unsigned long size,
1099 : enum ttm_bo_type type,
1100 : struct ttm_placement *placement,
1101 : uint32_t page_alignment,
1102 : bool interruptible,
1103 : struct uvm_object *persistent_swap_storage,
1104 : size_t acc_size,
1105 : struct sg_table *sg,
1106 : struct reservation_object *resv,
1107 : void (*destroy) (struct ttm_buffer_object *))
1108 : {
1109 : int ret = 0;
1110 : unsigned long num_pages;
1111 0 : struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
1112 : bool locked;
1113 :
1114 0 : ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
1115 0 : if (ret) {
1116 0 : pr_err("Out of kernel memory\n");
1117 0 : if (destroy)
1118 0 : (*destroy)(bo);
1119 : else
1120 0 : kfree(bo);
1121 0 : return -ENOMEM;
1122 : }
1123 :
1124 0 : num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
1125 0 : if (num_pages == 0) {
1126 0 : pr_err("Illegal buffer object size\n");
1127 0 : if (destroy)
1128 0 : (*destroy)(bo);
1129 : else
1130 0 : kfree(bo);
1131 0 : ttm_mem_global_free(mem_glob, acc_size);
1132 0 : return -EINVAL;
1133 : }
1134 0 : bo->destroy = destroy;
1135 :
1136 0 : uvm_objinit(&bo->uobj, NULL, 0);
1137 0 : kref_init(&bo->kref);
1138 0 : kref_init(&bo->list_kref);
1139 0 : atomic_set(&bo->cpu_writers, 0);
1140 0 : INIT_LIST_HEAD(&bo->lru);
1141 0 : INIT_LIST_HEAD(&bo->ddestroy);
1142 0 : INIT_LIST_HEAD(&bo->swap);
1143 0 : INIT_LIST_HEAD(&bo->io_reserve_lru);
1144 0 : rw_init(&bo->wu_mutex, "ttmwu");
1145 0 : bo->bdev = bdev;
1146 0 : bo->glob = bdev->glob;
1147 0 : bo->type = type;
1148 0 : bo->num_pages = num_pages;
1149 0 : bo->mem.size = num_pages << PAGE_SHIFT;
1150 0 : bo->mem.mem_type = TTM_PL_SYSTEM;
1151 0 : bo->mem.num_pages = bo->num_pages;
1152 0 : bo->mem.mm_node = NULL;
1153 0 : bo->mem.page_alignment = page_alignment;
1154 0 : bo->mem.bus.io_reserved_vm = false;
1155 0 : bo->mem.bus.io_reserved_count = 0;
1156 0 : bo->priv_flags = 0;
1157 0 : bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
1158 0 : bo->persistent_swap_storage = persistent_swap_storage;
1159 0 : bo->acc_size = acc_size;
1160 0 : bo->sg = sg;
1161 0 : if (resv) {
1162 0 : bo->resv = resv;
1163 : #ifdef notyet
1164 : lockdep_assert_held(&bo->resv->lock.base);
1165 : #endif
1166 0 : } else {
1167 0 : bo->resv = &bo->ttm_resv;
1168 0 : reservation_object_init(&bo->ttm_resv);
1169 : }
1170 0 : atomic_inc(&bo->glob->bo_count);
1171 0 : drm_vma_node_reset(&bo->vma_node);
1172 :
1173 : /*
1174 : * For ttm_bo_type_device buffers, allocate
1175 : * address space from the device.
1176 : */
1177 0 : if (bo->type == ttm_bo_type_device ||
1178 0 : bo->type == ttm_bo_type_sg)
1179 0 : ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
1180 0 : bo->mem.num_pages);
1181 :
1182 : /* passed reservation objects should already be locked,
1183 : * since otherwise lockdep will be angered in radeon.
1184 : */
1185 0 : if (!resv) {
1186 0 : locked = ww_mutex_trylock(&bo->resv->lock);
1187 0 : WARN_ON(!locked);
1188 0 : }
1189 :
1190 0 : if (likely(!ret))
1191 0 : ret = ttm_bo_validate(bo, placement, interruptible, false);
1192 :
1193 0 : if (!resv)
1194 0 : ttm_bo_unreserve(bo);
1195 :
1196 0 : if (unlikely(ret))
1197 0 : ttm_bo_unref(&bo);
1198 :
1199 0 : return ret;
1200 0 : }
1201 : EXPORT_SYMBOL(ttm_bo_init);
1202 :
1203 0 : size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
1204 : unsigned long bo_size,
1205 : unsigned struct_size)
1206 : {
1207 0 : unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1208 : size_t size = 0;
1209 :
1210 0 : size += ttm_round_pot(struct_size);
1211 0 : size += PAGE_ALIGN(npages * sizeof(void *));
1212 0 : size += ttm_round_pot(sizeof(struct ttm_tt));
1213 0 : return size;
1214 : }
1215 : EXPORT_SYMBOL(ttm_bo_acc_size);
1216 :
1217 0 : size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
1218 : unsigned long bo_size,
1219 : unsigned struct_size)
1220 : {
1221 0 : unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
1222 : size_t size = 0;
1223 :
1224 0 : size += ttm_round_pot(struct_size);
1225 0 : size += PAGE_ALIGN(npages * sizeof(void *));
1226 0 : size += PAGE_ALIGN(npages * sizeof(dma_addr_t));
1227 0 : size += ttm_round_pot(sizeof(struct ttm_dma_tt));
1228 0 : return size;
1229 : }
1230 : EXPORT_SYMBOL(ttm_bo_dma_acc_size);
1231 :
1232 0 : int ttm_bo_create(struct ttm_bo_device *bdev,
1233 : unsigned long size,
1234 : enum ttm_bo_type type,
1235 : struct ttm_placement *placement,
1236 : uint32_t page_alignment,
1237 : bool interruptible,
1238 : struct uvm_object *persistent_swap_storage,
1239 : struct ttm_buffer_object **p_bo)
1240 : {
1241 : struct ttm_buffer_object *bo;
1242 : size_t acc_size;
1243 : int ret;
1244 :
1245 0 : bo = kzalloc(sizeof(*bo), GFP_KERNEL);
1246 0 : if (unlikely(bo == NULL))
1247 0 : return -ENOMEM;
1248 :
1249 0 : acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
1250 0 : ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
1251 : interruptible, persistent_swap_storage, acc_size,
1252 : NULL, NULL, NULL);
1253 0 : if (likely(ret == 0))
1254 0 : *p_bo = bo;
1255 :
1256 0 : return ret;
1257 0 : }
1258 : EXPORT_SYMBOL(ttm_bo_create);
1259 :
1260 0 : static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
1261 : unsigned mem_type, bool allow_errors)
1262 : {
1263 0 : struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1264 0 : struct ttm_bo_global *glob = bdev->glob;
1265 : int ret;
1266 :
1267 : /*
1268 : * Can't use standard list traversal since we're unlocking.
1269 : */
1270 :
1271 0 : spin_lock(&glob->lru_lock);
1272 0 : while (!list_empty(&man->lru)) {
1273 : spin_unlock(&glob->lru_lock);
1274 0 : ret = ttm_mem_evict_first(bdev, mem_type, NULL, false, false);
1275 0 : if (ret) {
1276 0 : if (allow_errors) {
1277 0 : return ret;
1278 : } else {
1279 0 : pr_err("Cleanup eviction failed\n");
1280 : }
1281 0 : }
1282 0 : spin_lock(&glob->lru_lock);
1283 : }
1284 : spin_unlock(&glob->lru_lock);
1285 0 : return 0;
1286 0 : }
1287 :
1288 0 : int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1289 : {
1290 : struct ttm_mem_type_manager *man;
1291 : int ret = -EINVAL;
1292 :
1293 0 : if (mem_type >= TTM_NUM_MEM_TYPES) {
1294 0 : pr_err("Illegal memory type %d\n", mem_type);
1295 0 : return ret;
1296 : }
1297 0 : man = &bdev->man[mem_type];
1298 :
1299 0 : if (!man->has_type) {
1300 0 : pr_err("Trying to take down uninitialized memory manager type %u\n",
1301 : mem_type);
1302 0 : return ret;
1303 : }
1304 :
1305 0 : man->use_type = false;
1306 0 : man->has_type = false;
1307 :
1308 : ret = 0;
1309 0 : if (mem_type > 0) {
1310 0 : ttm_bo_force_list_clean(bdev, mem_type, false);
1311 :
1312 0 : ret = (*man->func->takedown)(man);
1313 0 : }
1314 :
1315 0 : return ret;
1316 0 : }
1317 : EXPORT_SYMBOL(ttm_bo_clean_mm);
1318 :
1319 0 : int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
1320 : {
1321 0 : struct ttm_mem_type_manager *man = &bdev->man[mem_type];
1322 :
1323 0 : if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
1324 0 : pr_err("Illegal memory manager memory type %u\n", mem_type);
1325 0 : return -EINVAL;
1326 : }
1327 :
1328 0 : if (!man->has_type) {
1329 0 : pr_err("Memory type %u has not been initialized\n", mem_type);
1330 0 : return 0;
1331 : }
1332 :
1333 0 : return ttm_bo_force_list_clean(bdev, mem_type, true);
1334 0 : }
1335 : EXPORT_SYMBOL(ttm_bo_evict_mm);
1336 :
1337 0 : int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
1338 : unsigned long p_size)
1339 : {
1340 : int ret = -EINVAL;
1341 : struct ttm_mem_type_manager *man;
1342 :
1343 0 : BUG_ON(type >= TTM_NUM_MEM_TYPES);
1344 0 : man = &bdev->man[type];
1345 0 : BUG_ON(man->has_type);
1346 0 : man->io_reserve_fastpath = true;
1347 0 : man->use_io_reserve_lru = false;
1348 0 : rw_init(&man->io_reserve_mutex, "ior");
1349 0 : INIT_LIST_HEAD(&man->io_reserve_lru);
1350 :
1351 0 : ret = bdev->driver->init_mem_type(bdev, type, man);
1352 0 : if (ret)
1353 0 : return ret;
1354 0 : man->bdev = bdev;
1355 :
1356 : ret = 0;
1357 0 : if (type != TTM_PL_SYSTEM) {
1358 0 : ret = (*man->func->init)(man, p_size);
1359 0 : if (ret)
1360 0 : return ret;
1361 : }
1362 0 : man->has_type = true;
1363 0 : man->use_type = true;
1364 0 : man->size = p_size;
1365 :
1366 0 : INIT_LIST_HEAD(&man->lru);
1367 :
1368 0 : return 0;
1369 0 : }
1370 : EXPORT_SYMBOL(ttm_bo_init_mm);
1371 :
1372 0 : static void ttm_bo_global_kobj_release(struct kobject *kobj)
1373 : {
1374 : struct ttm_bo_global *glob =
1375 0 : container_of(kobj, struct ttm_bo_global, kobj);
1376 :
1377 0 : ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
1378 0 : __free_page(glob->dummy_read_page);
1379 0 : kfree(glob);
1380 0 : }
1381 :
1382 0 : void ttm_bo_global_release(struct drm_global_reference *ref)
1383 : {
1384 0 : struct ttm_bo_global *glob = ref->object;
1385 :
1386 0 : kobject_del(&glob->kobj);
1387 0 : kobject_put(&glob->kobj);
1388 0 : }
1389 : EXPORT_SYMBOL(ttm_bo_global_release);
1390 :
1391 0 : int ttm_bo_global_init(struct drm_global_reference *ref)
1392 : {
1393 : struct ttm_bo_global_ref *bo_ref =
1394 0 : container_of(ref, struct ttm_bo_global_ref, ref);
1395 0 : struct ttm_bo_global *glob = ref->object;
1396 : int ret;
1397 :
1398 0 : rw_init(&glob->device_list_mutex, "gdl");
1399 0 : mtx_init(&glob->lru_lock, IPL_NONE);
1400 0 : glob->mem_glob = bo_ref->mem_glob;
1401 0 : glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
1402 :
1403 0 : if (unlikely(glob->dummy_read_page == NULL)) {
1404 : ret = -ENOMEM;
1405 0 : goto out_no_drp;
1406 : }
1407 :
1408 0 : INIT_LIST_HEAD(&glob->swap_lru);
1409 0 : INIT_LIST_HEAD(&glob->device_list);
1410 :
1411 0 : ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
1412 0 : ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
1413 0 : if (unlikely(ret != 0)) {
1414 0 : pr_err("Could not register buffer object swapout\n");
1415 : goto out_no_shrink;
1416 : }
1417 :
1418 0 : atomic_set(&glob->bo_count, 0);
1419 :
1420 0 : ret = kobject_init_and_add(
1421 0 : &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
1422 0 : if (unlikely(ret != 0))
1423 0 : kobject_put(&glob->kobj);
1424 0 : return ret;
1425 : out_no_shrink:
1426 0 : __free_page(glob->dummy_read_page);
1427 : out_no_drp:
1428 0 : kfree(glob);
1429 0 : return ret;
1430 0 : }
1431 : EXPORT_SYMBOL(ttm_bo_global_init);
1432 :
1433 :
1434 0 : int ttm_bo_device_release(struct ttm_bo_device *bdev)
1435 : {
1436 : int ret = 0;
1437 : unsigned i = TTM_NUM_MEM_TYPES;
1438 : struct ttm_mem_type_manager *man;
1439 0 : struct ttm_bo_global *glob = bdev->glob;
1440 :
1441 0 : while (i--) {
1442 0 : man = &bdev->man[i];
1443 0 : if (man->has_type) {
1444 0 : man->use_type = false;
1445 0 : if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
1446 : ret = -EBUSY;
1447 0 : pr_err("DRM memory manager type %d is not clean\n",
1448 : i);
1449 0 : }
1450 0 : man->has_type = false;
1451 0 : }
1452 : }
1453 :
1454 0 : mutex_lock(&glob->device_list_mutex);
1455 0 : list_del(&bdev->device_list);
1456 0 : mutex_unlock(&glob->device_list_mutex);
1457 :
1458 0 : cancel_delayed_work_sync(&bdev->wq);
1459 :
1460 0 : while (ttm_bo_delayed_delete(bdev, true))
1461 : ;
1462 :
1463 0 : spin_lock(&glob->lru_lock);
1464 0 : if (list_empty(&bdev->ddestroy))
1465 : TTM_DEBUG("Delayed destroy list was clean\n");
1466 :
1467 0 : if (list_empty(&bdev->man[0].lru))
1468 : TTM_DEBUG("Swap list was clean\n");
1469 0 : spin_unlock(&glob->lru_lock);
1470 :
1471 0 : drm_vma_offset_manager_destroy(&bdev->vma_manager);
1472 :
1473 0 : return ret;
1474 : }
1475 : EXPORT_SYMBOL(ttm_bo_device_release);
1476 :
1477 0 : int ttm_bo_device_init(struct ttm_bo_device *bdev,
1478 : struct ttm_bo_global *glob,
1479 : struct ttm_bo_driver *driver,
1480 : struct address_space *mapping,
1481 : uint64_t file_page_offset,
1482 : bool need_dma32)
1483 : {
1484 : int ret = -EINVAL;
1485 :
1486 0 : bdev->driver = driver;
1487 :
1488 0 : memset(bdev->man, 0, sizeof(bdev->man));
1489 :
1490 : /*
1491 : * Initialize the system memory buffer type.
1492 : * Other types need to be driver / IOCTL initialized.
1493 : */
1494 0 : ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
1495 0 : if (unlikely(ret != 0))
1496 : goto out_no_sys;
1497 :
1498 0 : drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
1499 : 0x10000000);
1500 0 : INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
1501 0 : INIT_LIST_HEAD(&bdev->ddestroy);
1502 0 : bdev->dev_mapping = mapping;
1503 0 : bdev->glob = glob;
1504 0 : bdev->need_dma32 = need_dma32;
1505 0 : bdev->val_seq = 0;
1506 0 : mutex_lock(&glob->device_list_mutex);
1507 0 : list_add_tail(&bdev->device_list, &glob->device_list);
1508 0 : mutex_unlock(&glob->device_list_mutex);
1509 :
1510 0 : return 0;
1511 : out_no_sys:
1512 0 : return ret;
1513 0 : }
1514 : EXPORT_SYMBOL(ttm_bo_device_init);
1515 :
1516 : /*
1517 : * buffer object vm functions.
1518 : */
1519 :
1520 0 : bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
1521 : {
1522 0 : struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
1523 :
1524 0 : if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
1525 0 : if (mem->mem_type == TTM_PL_SYSTEM)
1526 0 : return false;
1527 :
1528 0 : if (man->flags & TTM_MEMTYPE_FLAG_CMA)
1529 0 : return false;
1530 :
1531 0 : if (mem->placement & TTM_PL_FLAG_CACHED)
1532 0 : return false;
1533 : }
1534 0 : return true;
1535 0 : }
1536 :
1537 : #ifdef __linux__
1538 : void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1539 : {
1540 : struct ttm_bo_device *bdev = bo->bdev;
1541 :
1542 : drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);
1543 : ttm_mem_io_free_vm(bo);
1544 : }
1545 : #else
1546 0 : void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
1547 : {
1548 0 : struct ttm_tt *ttm = bo->ttm;
1549 : struct vm_page *page;
1550 : bus_addr_t addr;
1551 : paddr_t paddr;
1552 : int i;
1553 :
1554 0 : if (drm_vma_node_has_offset(&bo->vma_node)) {
1555 0 : if (bo->mem.bus.is_iomem) {
1556 0 : for (i = 0; i < bo->mem.num_pages; ++i) {
1557 0 : addr = bo->mem.bus.base + bo->mem.bus.offset;
1558 0 : paddr = bus_space_mmap(bo->bdev->memt, addr,
1559 : i << PAGE_SHIFT, 0, 0);
1560 0 : page = PHYS_TO_VM_PAGE(paddr);
1561 0 : if (unlikely(page == NULL))
1562 : continue;
1563 0 : pmap_page_protect(page, PROT_NONE);
1564 0 : }
1565 0 : } else if (ttm) {
1566 0 : for (i = 0; i < ttm->num_pages; ++i) {
1567 0 : page = ttm->pages[i];
1568 0 : if (unlikely(page == NULL))
1569 : continue;
1570 0 : pmap_page_protect(page, PROT_NONE);
1571 0 : }
1572 : }
1573 : }
1574 0 : ttm_mem_io_free_vm(bo);
1575 0 : }
1576 : #endif
1577 :
1578 0 : void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
1579 : {
1580 0 : struct ttm_bo_device *bdev = bo->bdev;
1581 0 : struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
1582 :
1583 0 : ttm_mem_io_lock(man, false);
1584 0 : ttm_bo_unmap_virtual_locked(bo);
1585 0 : ttm_mem_io_unlock(man);
1586 0 : }
1587 :
1588 :
1589 : EXPORT_SYMBOL(ttm_bo_unmap_virtual);
1590 :
1591 0 : int ttm_bo_wait(struct ttm_buffer_object *bo,
1592 : bool lazy, bool interruptible, bool no_wait)
1593 : {
1594 : struct reservation_object_list *fobj;
1595 : struct reservation_object *resv;
1596 : struct fence *excl;
1597 0 : long timeout = 15 * HZ;
1598 : int i;
1599 :
1600 0 : resv = bo->resv;
1601 0 : fobj = reservation_object_get_list(resv);
1602 0 : excl = reservation_object_get_excl(resv);
1603 0 : if (excl) {
1604 0 : if (!fence_is_signaled(excl)) {
1605 0 : if (no_wait)
1606 0 : return -EBUSY;
1607 :
1608 0 : timeout = fence_wait_timeout(excl,
1609 : interruptible, timeout);
1610 0 : }
1611 : }
1612 :
1613 0 : for (i = 0; fobj && timeout > 0 && i < fobj->shared_count; ++i) {
1614 : struct fence *fence;
1615 0 : fence = rcu_dereference_protected(fobj->shared[i],
1616 : reservation_object_held(resv));
1617 :
1618 0 : if (!fence_is_signaled(fence)) {
1619 0 : if (no_wait)
1620 0 : return -EBUSY;
1621 :
1622 0 : timeout = fence_wait_timeout(fence,
1623 : interruptible, timeout);
1624 0 : }
1625 0 : }
1626 :
1627 0 : if (timeout < 0)
1628 0 : return timeout;
1629 :
1630 0 : if (timeout == 0)
1631 0 : return -EBUSY;
1632 :
1633 0 : reservation_object_add_excl_fence(resv, NULL);
1634 0 : clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
1635 0 : return 0;
1636 0 : }
1637 : EXPORT_SYMBOL(ttm_bo_wait);
1638 :
1639 0 : int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
1640 : {
1641 : int ret = 0;
1642 :
1643 : /*
1644 : * Using ttm_bo_reserve makes sure the lru lists are updated.
1645 : */
1646 :
1647 0 : ret = ttm_bo_reserve(bo, true, no_wait, false, NULL);
1648 0 : if (unlikely(ret != 0))
1649 0 : return ret;
1650 0 : ret = ttm_bo_wait(bo, false, true, no_wait);
1651 0 : if (likely(ret == 0))
1652 0 : atomic_inc(&bo->cpu_writers);
1653 0 : ttm_bo_unreserve(bo);
1654 0 : return ret;
1655 0 : }
1656 : EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
1657 :
1658 0 : void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
1659 : {
1660 0 : atomic_dec(&bo->cpu_writers);
1661 0 : }
1662 : EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
1663 :
1664 : /**
1665 : * A buffer object shrink method that tries to swap out the first
1666 : * buffer object on the bo_global::swap_lru list.
1667 : */
1668 :
1669 0 : static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
1670 : {
1671 : struct ttm_bo_global *glob =
1672 0 : container_of(shrink, struct ttm_bo_global, shrink);
1673 : struct ttm_buffer_object *bo;
1674 : int ret = -EBUSY;
1675 : int put_count;
1676 :
1677 0 : spin_lock(&glob->lru_lock);
1678 0 : list_for_each_entry(bo, &glob->swap_lru, swap) {
1679 0 : ret = __ttm_bo_reserve(bo, false, true, false, NULL);
1680 0 : if (!ret)
1681 : break;
1682 : }
1683 :
1684 0 : if (ret) {
1685 0 : spin_unlock(&glob->lru_lock);
1686 0 : return ret;
1687 : }
1688 :
1689 0 : kref_get(&bo->list_kref);
1690 :
1691 0 : if (!list_empty(&bo->ddestroy)) {
1692 0 : ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false);
1693 0 : kref_put(&bo->list_kref, ttm_bo_release_list);
1694 0 : return ret;
1695 : }
1696 :
1697 0 : put_count = ttm_bo_del_from_lru(bo);
1698 0 : spin_unlock(&glob->lru_lock);
1699 :
1700 0 : ttm_bo_list_ref_sub(bo, put_count, true);
1701 :
1702 : /**
1703 : * Wait for GPU, then move to system cached.
1704 : */
1705 :
1706 0 : ret = ttm_bo_wait(bo, false, false, false);
1707 :
1708 0 : if (unlikely(ret != 0))
1709 : goto out;
1710 :
1711 0 : if (bo->mem.mem_type != TTM_PL_SYSTEM ||
1712 0 : bo->ttm->caching_state != tt_cached) {
1713 0 : struct ttm_mem_reg evict_mem;
1714 :
1715 0 : evict_mem = bo->mem;
1716 0 : evict_mem.mm_node = NULL;
1717 0 : evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
1718 0 : evict_mem.mem_type = TTM_PL_SYSTEM;
1719 :
1720 0 : ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
1721 : false, false);
1722 0 : if (unlikely(ret != 0))
1723 0 : goto out;
1724 0 : }
1725 :
1726 0 : ttm_bo_unmap_virtual(bo);
1727 :
1728 : /**
1729 : * Swap out. Buffer will be swapped in again as soon as
1730 : * anyone tries to access a ttm page.
1731 : */
1732 :
1733 0 : if (bo->bdev->driver->swap_notify)
1734 0 : bo->bdev->driver->swap_notify(bo);
1735 :
1736 0 : ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
1737 : out:
1738 :
1739 : /**
1740 : *
1741 : * Unreserve without putting on LRU to avoid swapping out an
1742 : * already swapped buffer.
1743 : */
1744 :
1745 0 : __ttm_bo_unreserve(bo);
1746 0 : kref_put(&bo->list_kref, ttm_bo_release_list);
1747 0 : return ret;
1748 0 : }
1749 :
1750 0 : void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
1751 : {
1752 0 : while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
1753 : ;
1754 0 : }
1755 : EXPORT_SYMBOL(ttm_bo_swapout_all);
1756 :
1757 : /**
1758 : * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
1759 : * unreserved
1760 : *
1761 : * @bo: Pointer to buffer
1762 : */
1763 0 : int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
1764 : {
1765 : int ret;
1766 :
1767 : /*
1768 : * In the absense of a wait_unlocked API,
1769 : * Use the bo::wu_mutex to avoid triggering livelocks due to
1770 : * concurrent use of this function. Note that this use of
1771 : * bo::wu_mutex can go away if we change locking order to
1772 : * mmap_sem -> bo::reserve.
1773 : */
1774 0 : ret = mutex_lock_interruptible(&bo->wu_mutex);
1775 0 : if (unlikely(ret != 0))
1776 0 : return -ERESTARTSYS;
1777 0 : if (!ww_mutex_is_locked(&bo->resv->lock))
1778 : goto out_unlock;
1779 0 : ret = __ttm_bo_reserve(bo, true, false, false, NULL);
1780 0 : if (unlikely(ret != 0))
1781 : goto out_unlock;
1782 0 : __ttm_bo_unreserve(bo);
1783 :
1784 : out_unlock:
1785 0 : mutex_unlock(&bo->wu_mutex);
1786 0 : return ret;
1787 0 : }
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