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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 | #include "ttm/ttm_module.h" | |
32 | #include "ttm/ttm_bo_driver.h" | |
33 | #include "ttm/ttm_placement.h" | |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/file.h> | |
39 | #include <linux/module.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_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 TH |
46 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
47 | ||
48 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
49 | { | |
50 | return 1 << (type); | |
51 | } | |
52 | ||
53 | static void ttm_bo_release_list(struct kref *list_kref) | |
54 | { | |
55 | struct ttm_buffer_object *bo = | |
56 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
57 | struct ttm_bo_device *bdev = bo->bdev; | |
58 | ||
59 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
60 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
61 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
62 | BUG_ON(bo->sync_obj != NULL); | |
63 | BUG_ON(bo->mem.mm_node != NULL); | |
64 | BUG_ON(!list_empty(&bo->lru)); | |
65 | BUG_ON(!list_empty(&bo->ddestroy)); | |
66 | ||
67 | if (bo->ttm) | |
68 | ttm_tt_destroy(bo->ttm); | |
69 | if (bo->destroy) | |
70 | bo->destroy(bo); | |
71 | else { | |
72 | ttm_mem_global_free(bdev->mem_glob, bo->acc_size, false); | |
73 | kfree(bo); | |
74 | } | |
75 | } | |
76 | ||
77 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
78 | { | |
79 | ||
80 | if (interruptible) { | |
81 | int ret = 0; | |
82 | ||
83 | ret = wait_event_interruptible(bo->event_queue, | |
84 | atomic_read(&bo->reserved) == 0); | |
85 | if (unlikely(ret != 0)) | |
86 | return -ERESTART; | |
87 | } else { | |
88 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
94 | { | |
95 | struct ttm_bo_device *bdev = bo->bdev; | |
96 | struct ttm_mem_type_manager *man; | |
97 | ||
98 | BUG_ON(!atomic_read(&bo->reserved)); | |
99 | ||
100 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
101 | ||
102 | BUG_ON(!list_empty(&bo->lru)); | |
103 | ||
104 | man = &bdev->man[bo->mem.mem_type]; | |
105 | list_add_tail(&bo->lru, &man->lru); | |
106 | kref_get(&bo->list_kref); | |
107 | ||
108 | if (bo->ttm != NULL) { | |
109 | list_add_tail(&bo->swap, &bdev->swap_lru); | |
110 | kref_get(&bo->list_kref); | |
111 | } | |
112 | } | |
113 | } | |
114 | ||
115 | /** | |
116 | * Call with the lru_lock held. | |
117 | */ | |
118 | ||
119 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
120 | { | |
121 | int put_count = 0; | |
122 | ||
123 | if (!list_empty(&bo->swap)) { | |
124 | list_del_init(&bo->swap); | |
125 | ++put_count; | |
126 | } | |
127 | if (!list_empty(&bo->lru)) { | |
128 | list_del_init(&bo->lru); | |
129 | ++put_count; | |
130 | } | |
131 | ||
132 | /* | |
133 | * TODO: Add a driver hook to delete from | |
134 | * driver-specific LRU's here. | |
135 | */ | |
136 | ||
137 | return put_count; | |
138 | } | |
139 | ||
140 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
141 | bool interruptible, | |
142 | bool no_wait, bool use_sequence, uint32_t sequence) | |
143 | { | |
144 | struct ttm_bo_device *bdev = bo->bdev; | |
145 | int ret; | |
146 | ||
147 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
148 | if (use_sequence && bo->seq_valid && | |
149 | (sequence - bo->val_seq < (1 << 31))) { | |
150 | return -EAGAIN; | |
151 | } | |
152 | ||
153 | if (no_wait) | |
154 | return -EBUSY; | |
155 | ||
156 | spin_unlock(&bdev->lru_lock); | |
157 | ret = ttm_bo_wait_unreserved(bo, interruptible); | |
158 | spin_lock(&bdev->lru_lock); | |
159 | ||
160 | if (unlikely(ret)) | |
161 | return ret; | |
162 | } | |
163 | ||
164 | if (use_sequence) { | |
165 | bo->val_seq = sequence; | |
166 | bo->seq_valid = true; | |
167 | } else { | |
168 | bo->seq_valid = false; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | EXPORT_SYMBOL(ttm_bo_reserve); | |
174 | ||
175 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
176 | { | |
177 | BUG(); | |
178 | } | |
179 | ||
180 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
181 | bool interruptible, | |
182 | bool no_wait, bool use_sequence, uint32_t sequence) | |
183 | { | |
184 | struct ttm_bo_device *bdev = bo->bdev; | |
185 | int put_count = 0; | |
186 | int ret; | |
187 | ||
188 | spin_lock(&bdev->lru_lock); | |
189 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, | |
190 | sequence); | |
191 | if (likely(ret == 0)) | |
192 | put_count = ttm_bo_del_from_lru(bo); | |
193 | spin_unlock(&bdev->lru_lock); | |
194 | ||
195 | while (put_count--) | |
196 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
197 | ||
198 | return ret; | |
199 | } | |
200 | ||
201 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
202 | { | |
203 | struct ttm_bo_device *bdev = bo->bdev; | |
204 | ||
205 | spin_lock(&bdev->lru_lock); | |
206 | ttm_bo_add_to_lru(bo); | |
207 | atomic_set(&bo->reserved, 0); | |
208 | wake_up_all(&bo->event_queue); | |
209 | spin_unlock(&bdev->lru_lock); | |
210 | } | |
211 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
212 | ||
213 | /* | |
214 | * Call bo->mutex locked. | |
215 | */ | |
216 | ||
217 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) | |
218 | { | |
219 | struct ttm_bo_device *bdev = bo->bdev; | |
220 | int ret = 0; | |
221 | uint32_t page_flags = 0; | |
222 | ||
223 | TTM_ASSERT_LOCKED(&bo->mutex); | |
224 | bo->ttm = NULL; | |
225 | ||
ad49f501 DA |
226 | if (bdev->need_dma32) |
227 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
228 | ||
ba4e7d97 TH |
229 | switch (bo->type) { |
230 | case ttm_bo_type_device: | |
231 | if (zero_alloc) | |
232 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
233 | case ttm_bo_type_kernel: | |
234 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
235 | page_flags, bdev->dummy_read_page); | |
236 | if (unlikely(bo->ttm == NULL)) | |
237 | ret = -ENOMEM; | |
238 | break; | |
239 | case ttm_bo_type_user: | |
240 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
241 | page_flags | TTM_PAGE_FLAG_USER, | |
242 | bdev->dummy_read_page); | |
243 | if (unlikely(bo->ttm == NULL)) | |
244 | ret = -ENOMEM; | |
245 | break; | |
246 | ||
247 | ret = ttm_tt_set_user(bo->ttm, current, | |
248 | bo->buffer_start, bo->num_pages); | |
249 | if (unlikely(ret != 0)) | |
250 | ttm_tt_destroy(bo->ttm); | |
251 | break; | |
252 | default: | |
253 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
254 | ret = -EINVAL; | |
255 | break; | |
256 | } | |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
261 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
262 | struct ttm_mem_reg *mem, | |
263 | bool evict, bool interruptible, bool no_wait) | |
264 | { | |
265 | struct ttm_bo_device *bdev = bo->bdev; | |
266 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
267 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
268 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
269 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
270 | int ret = 0; | |
271 | ||
272 | if (old_is_pci || new_is_pci || | |
273 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
274 | ttm_bo_unmap_virtual(bo); | |
275 | ||
276 | /* | |
277 | * Create and bind a ttm if required. | |
278 | */ | |
279 | ||
280 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
281 | ret = ttm_bo_add_ttm(bo, false); | |
282 | if (ret) | |
283 | goto out_err; | |
284 | ||
285 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
286 | if (ret) | |
87ef9209 | 287 | goto out_err; |
ba4e7d97 TH |
288 | |
289 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
290 | ret = ttm_tt_bind(bo->ttm, mem); | |
291 | if (ret) | |
292 | goto out_err; | |
293 | } | |
294 | ||
295 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
296 | ||
297 | struct ttm_mem_reg *old_mem = &bo->mem; | |
298 | uint32_t save_flags = old_mem->placement; | |
299 | ||
300 | *old_mem = *mem; | |
301 | mem->mm_node = NULL; | |
302 | ttm_flag_masked(&save_flags, mem->placement, | |
303 | TTM_PL_MASK_MEMTYPE); | |
304 | goto moved; | |
305 | } | |
306 | ||
307 | } | |
308 | ||
e024e110 DA |
309 | if (bdev->driver->move_notify) |
310 | bdev->driver->move_notify(bo, mem); | |
311 | ||
ba4e7d97 TH |
312 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
313 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
314 | ret = ttm_bo_move_ttm(bo, evict, no_wait, mem); | |
315 | else if (bdev->driver->move) | |
316 | ret = bdev->driver->move(bo, evict, interruptible, | |
317 | no_wait, mem); | |
318 | else | |
319 | ret = ttm_bo_move_memcpy(bo, evict, no_wait, mem); | |
320 | ||
321 | if (ret) | |
322 | goto out_err; | |
323 | ||
324 | moved: | |
325 | if (bo->evicted) { | |
326 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
327 | if (ret) | |
328 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
329 | bo->evicted = false; | |
330 | } | |
331 | ||
332 | if (bo->mem.mm_node) { | |
333 | spin_lock(&bo->lock); | |
334 | bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) + | |
335 | bdev->man[bo->mem.mem_type].gpu_offset; | |
336 | bo->cur_placement = bo->mem.placement; | |
337 | spin_unlock(&bo->lock); | |
338 | } | |
339 | ||
340 | return 0; | |
341 | ||
342 | out_err: | |
343 | new_man = &bdev->man[bo->mem.mem_type]; | |
344 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
345 | ttm_tt_unbind(bo->ttm); | |
346 | ttm_tt_destroy(bo->ttm); | |
347 | bo->ttm = NULL; | |
348 | } | |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
353 | /** | |
354 | * If bo idle, remove from delayed- and lru lists, and unref. | |
355 | * If not idle, and already on delayed list, do nothing. | |
356 | * If not idle, and not on delayed list, put on delayed list, | |
357 | * up the list_kref and schedule a delayed list check. | |
358 | */ | |
359 | ||
360 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all) | |
361 | { | |
362 | struct ttm_bo_device *bdev = bo->bdev; | |
363 | struct ttm_bo_driver *driver = bdev->driver; | |
364 | int ret; | |
365 | ||
366 | spin_lock(&bo->lock); | |
367 | (void) ttm_bo_wait(bo, false, false, !remove_all); | |
368 | ||
369 | if (!bo->sync_obj) { | |
370 | int put_count; | |
371 | ||
372 | spin_unlock(&bo->lock); | |
373 | ||
374 | spin_lock(&bdev->lru_lock); | |
375 | ret = ttm_bo_reserve_locked(bo, false, false, false, 0); | |
376 | BUG_ON(ret); | |
377 | if (bo->ttm) | |
378 | ttm_tt_unbind(bo->ttm); | |
379 | ||
380 | if (!list_empty(&bo->ddestroy)) { | |
381 | list_del_init(&bo->ddestroy); | |
382 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
383 | } | |
384 | if (bo->mem.mm_node) { | |
385 | drm_mm_put_block(bo->mem.mm_node); | |
386 | bo->mem.mm_node = NULL; | |
387 | } | |
388 | put_count = ttm_bo_del_from_lru(bo); | |
389 | spin_unlock(&bdev->lru_lock); | |
390 | ||
391 | atomic_set(&bo->reserved, 0); | |
392 | ||
393 | while (put_count--) | |
394 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | spin_lock(&bdev->lru_lock); | |
400 | if (list_empty(&bo->ddestroy)) { | |
401 | void *sync_obj = bo->sync_obj; | |
402 | void *sync_obj_arg = bo->sync_obj_arg; | |
403 | ||
404 | kref_get(&bo->list_kref); | |
405 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
406 | spin_unlock(&bdev->lru_lock); | |
407 | spin_unlock(&bo->lock); | |
408 | ||
409 | if (sync_obj) | |
410 | driver->sync_obj_flush(sync_obj, sync_obj_arg); | |
411 | schedule_delayed_work(&bdev->wq, | |
412 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
413 | ret = 0; | |
414 | ||
415 | } else { | |
416 | spin_unlock(&bdev->lru_lock); | |
417 | spin_unlock(&bo->lock); | |
418 | ret = -EBUSY; | |
419 | } | |
420 | ||
421 | return ret; | |
422 | } | |
423 | ||
424 | /** | |
425 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
426 | * encountered buffers. | |
427 | */ | |
428 | ||
429 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
430 | { | |
431 | struct ttm_buffer_object *entry, *nentry; | |
432 | struct list_head *list, *next; | |
433 | int ret; | |
434 | ||
435 | spin_lock(&bdev->lru_lock); | |
436 | list_for_each_safe(list, next, &bdev->ddestroy) { | |
437 | entry = list_entry(list, struct ttm_buffer_object, ddestroy); | |
438 | nentry = NULL; | |
439 | ||
440 | /* | |
441 | * Protect the next list entry from destruction while we | |
442 | * unlock the lru_lock. | |
443 | */ | |
444 | ||
445 | if (next != &bdev->ddestroy) { | |
446 | nentry = list_entry(next, struct ttm_buffer_object, | |
447 | ddestroy); | |
448 | kref_get(&nentry->list_kref); | |
449 | } | |
450 | kref_get(&entry->list_kref); | |
451 | ||
452 | spin_unlock(&bdev->lru_lock); | |
453 | ret = ttm_bo_cleanup_refs(entry, remove_all); | |
454 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
455 | ||
456 | spin_lock(&bdev->lru_lock); | |
457 | if (nentry) { | |
458 | bool next_onlist = !list_empty(next); | |
459 | spin_unlock(&bdev->lru_lock); | |
460 | kref_put(&nentry->list_kref, ttm_bo_release_list); | |
461 | spin_lock(&bdev->lru_lock); | |
462 | /* | |
463 | * Someone might have raced us and removed the | |
464 | * next entry from the list. We don't bother restarting | |
465 | * list traversal. | |
466 | */ | |
467 | ||
468 | if (!next_onlist) | |
469 | break; | |
470 | } | |
471 | if (ret) | |
472 | break; | |
473 | } | |
474 | ret = !list_empty(&bdev->ddestroy); | |
475 | spin_unlock(&bdev->lru_lock); | |
476 | ||
477 | return ret; | |
478 | } | |
479 | ||
480 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
481 | { | |
482 | struct ttm_bo_device *bdev = | |
483 | container_of(work, struct ttm_bo_device, wq.work); | |
484 | ||
485 | if (ttm_bo_delayed_delete(bdev, false)) { | |
486 | schedule_delayed_work(&bdev->wq, | |
487 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
488 | } | |
489 | } | |
490 | ||
491 | static void ttm_bo_release(struct kref *kref) | |
492 | { | |
493 | struct ttm_buffer_object *bo = | |
494 | container_of(kref, struct ttm_buffer_object, kref); | |
495 | struct ttm_bo_device *bdev = bo->bdev; | |
496 | ||
497 | if (likely(bo->vm_node != NULL)) { | |
498 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
499 | drm_mm_put_block(bo->vm_node); | |
500 | bo->vm_node = NULL; | |
501 | } | |
502 | write_unlock(&bdev->vm_lock); | |
503 | ttm_bo_cleanup_refs(bo, false); | |
504 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
505 | write_lock(&bdev->vm_lock); | |
506 | } | |
507 | ||
508 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
509 | { | |
510 | struct ttm_buffer_object *bo = *p_bo; | |
511 | struct ttm_bo_device *bdev = bo->bdev; | |
512 | ||
513 | *p_bo = NULL; | |
514 | write_lock(&bdev->vm_lock); | |
515 | kref_put(&bo->kref, ttm_bo_release); | |
516 | write_unlock(&bdev->vm_lock); | |
517 | } | |
518 | EXPORT_SYMBOL(ttm_bo_unref); | |
519 | ||
520 | static int ttm_bo_evict(struct ttm_buffer_object *bo, unsigned mem_type, | |
521 | bool interruptible, bool no_wait) | |
522 | { | |
523 | int ret = 0; | |
524 | struct ttm_bo_device *bdev = bo->bdev; | |
525 | struct ttm_mem_reg evict_mem; | |
526 | uint32_t proposed_placement; | |
527 | ||
528 | if (bo->mem.mem_type != mem_type) | |
529 | goto out; | |
530 | ||
531 | spin_lock(&bo->lock); | |
532 | ret = ttm_bo_wait(bo, false, interruptible, no_wait); | |
533 | spin_unlock(&bo->lock); | |
534 | ||
78ecf091 TH |
535 | if (unlikely(ret != 0)) { |
536 | if (ret != -ERESTART) { | |
537 | printk(KERN_ERR TTM_PFX | |
538 | "Failed to expire sync object before " | |
539 | "buffer eviction.\n"); | |
540 | } | |
ba4e7d97 TH |
541 | goto out; |
542 | } | |
543 | ||
544 | BUG_ON(!atomic_read(&bo->reserved)); | |
545 | ||
546 | evict_mem = bo->mem; | |
547 | evict_mem.mm_node = NULL; | |
548 | ||
549 | proposed_placement = bdev->driver->evict_flags(bo); | |
550 | ||
551 | ret = ttm_bo_mem_space(bo, proposed_placement, | |
552 | &evict_mem, interruptible, no_wait); | |
553 | if (unlikely(ret != 0 && ret != -ERESTART)) | |
554 | ret = ttm_bo_mem_space(bo, TTM_PL_FLAG_SYSTEM, | |
555 | &evict_mem, interruptible, no_wait); | |
556 | ||
557 | if (ret) { | |
558 | if (ret != -ERESTART) | |
559 | printk(KERN_ERR TTM_PFX | |
560 | "Failed to find memory space for " | |
561 | "buffer 0x%p eviction.\n", bo); | |
562 | goto out; | |
563 | } | |
564 | ||
565 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
566 | no_wait); | |
567 | if (ret) { | |
568 | if (ret != -ERESTART) | |
569 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); | |
570 | goto out; | |
571 | } | |
572 | ||
573 | spin_lock(&bdev->lru_lock); | |
574 | if (evict_mem.mm_node) { | |
575 | drm_mm_put_block(evict_mem.mm_node); | |
576 | evict_mem.mm_node = NULL; | |
577 | } | |
578 | spin_unlock(&bdev->lru_lock); | |
579 | bo->evicted = true; | |
580 | out: | |
581 | return ret; | |
582 | } | |
583 | ||
584 | /** | |
585 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
586 | * space, or we've evicted everything and there isn't enough space. | |
587 | */ | |
588 | static int ttm_bo_mem_force_space(struct ttm_bo_device *bdev, | |
589 | struct ttm_mem_reg *mem, | |
590 | uint32_t mem_type, | |
591 | bool interruptible, bool no_wait) | |
592 | { | |
593 | struct drm_mm_node *node; | |
594 | struct ttm_buffer_object *entry; | |
595 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
596 | struct list_head *lru; | |
597 | unsigned long num_pages = mem->num_pages; | |
598 | int put_count = 0; | |
599 | int ret; | |
600 | ||
601 | retry_pre_get: | |
602 | ret = drm_mm_pre_get(&man->manager); | |
603 | if (unlikely(ret != 0)) | |
604 | return ret; | |
605 | ||
606 | spin_lock(&bdev->lru_lock); | |
607 | do { | |
608 | node = drm_mm_search_free(&man->manager, num_pages, | |
609 | mem->page_alignment, 1); | |
610 | if (node) | |
611 | break; | |
612 | ||
613 | lru = &man->lru; | |
614 | if (list_empty(lru)) | |
615 | break; | |
616 | ||
617 | entry = list_first_entry(lru, struct ttm_buffer_object, lru); | |
618 | kref_get(&entry->list_kref); | |
619 | ||
620 | ret = | |
621 | ttm_bo_reserve_locked(entry, interruptible, no_wait, | |
622 | false, 0); | |
623 | ||
624 | if (likely(ret == 0)) | |
625 | put_count = ttm_bo_del_from_lru(entry); | |
626 | ||
627 | spin_unlock(&bdev->lru_lock); | |
628 | ||
629 | if (unlikely(ret != 0)) | |
630 | return ret; | |
631 | ||
632 | while (put_count--) | |
633 | kref_put(&entry->list_kref, ttm_bo_ref_bug); | |
634 | ||
635 | ret = ttm_bo_evict(entry, mem_type, interruptible, no_wait); | |
636 | ||
637 | ttm_bo_unreserve(entry); | |
638 | ||
639 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
640 | if (ret) | |
641 | return ret; | |
642 | ||
643 | spin_lock(&bdev->lru_lock); | |
644 | } while (1); | |
645 | ||
646 | if (!node) { | |
647 | spin_unlock(&bdev->lru_lock); | |
648 | return -ENOMEM; | |
649 | } | |
650 | ||
651 | node = drm_mm_get_block_atomic(node, num_pages, mem->page_alignment); | |
652 | if (unlikely(!node)) { | |
653 | spin_unlock(&bdev->lru_lock); | |
654 | goto retry_pre_get; | |
655 | } | |
656 | ||
657 | spin_unlock(&bdev->lru_lock); | |
658 | mem->mm_node = node; | |
659 | mem->mem_type = mem_type; | |
660 | return 0; | |
661 | } | |
662 | ||
ae3e8122 TH |
663 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
664 | uint32_t cur_placement, | |
665 | uint32_t proposed_placement) | |
666 | { | |
667 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
668 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
669 | ||
670 | /** | |
671 | * Keep current caching if possible. | |
672 | */ | |
673 | ||
674 | if ((cur_placement & caching) != 0) | |
675 | result |= (cur_placement & caching); | |
676 | else if ((man->default_caching & caching) != 0) | |
677 | result |= man->default_caching; | |
678 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
679 | result |= TTM_PL_FLAG_CACHED; | |
680 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
681 | result |= TTM_PL_FLAG_WC; | |
682 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
683 | result |= TTM_PL_FLAG_UNCACHED; | |
684 | ||
685 | return result; | |
686 | } | |
687 | ||
688 | ||
ba4e7d97 TH |
689 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
690 | bool disallow_fixed, | |
691 | uint32_t mem_type, | |
ae3e8122 TH |
692 | uint32_t proposed_placement, |
693 | uint32_t *masked_placement) | |
ba4e7d97 TH |
694 | { |
695 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
696 | ||
697 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
698 | return false; | |
699 | ||
ae3e8122 | 700 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
701 | return false; |
702 | ||
ae3e8122 | 703 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 704 | return false; |
ba4e7d97 | 705 | |
ae3e8122 TH |
706 | cur_flags |= (proposed_placement & man->available_caching); |
707 | ||
708 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
709 | return true; |
710 | } | |
711 | ||
712 | /** | |
713 | * Creates space for memory region @mem according to its type. | |
714 | * | |
715 | * This function first searches for free space in compatible memory types in | |
716 | * the priority order defined by the driver. If free space isn't found, then | |
717 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
718 | * space. | |
719 | */ | |
720 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
721 | uint32_t proposed_placement, | |
722 | struct ttm_mem_reg *mem, | |
723 | bool interruptible, bool no_wait) | |
724 | { | |
725 | struct ttm_bo_device *bdev = bo->bdev; | |
726 | struct ttm_mem_type_manager *man; | |
727 | ||
728 | uint32_t num_prios = bdev->driver->num_mem_type_prio; | |
729 | const uint32_t *prios = bdev->driver->mem_type_prio; | |
730 | uint32_t i; | |
731 | uint32_t mem_type = TTM_PL_SYSTEM; | |
732 | uint32_t cur_flags = 0; | |
733 | bool type_found = false; | |
734 | bool type_ok = false; | |
735 | bool has_eagain = false; | |
736 | struct drm_mm_node *node = NULL; | |
737 | int ret; | |
738 | ||
739 | mem->mm_node = NULL; | |
740 | for (i = 0; i < num_prios; ++i) { | |
741 | mem_type = prios[i]; | |
742 | man = &bdev->man[mem_type]; | |
743 | ||
744 | type_ok = ttm_bo_mt_compatible(man, | |
745 | bo->type == ttm_bo_type_user, | |
746 | mem_type, proposed_placement, | |
747 | &cur_flags); | |
748 | ||
749 | if (!type_ok) | |
750 | continue; | |
751 | ||
ae3e8122 TH |
752 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
753 | cur_flags); | |
754 | ||
ba4e7d97 TH |
755 | if (mem_type == TTM_PL_SYSTEM) |
756 | break; | |
757 | ||
758 | if (man->has_type && man->use_type) { | |
759 | type_found = true; | |
760 | do { | |
761 | ret = drm_mm_pre_get(&man->manager); | |
762 | if (unlikely(ret)) | |
763 | return ret; | |
764 | ||
765 | spin_lock(&bdev->lru_lock); | |
766 | node = drm_mm_search_free(&man->manager, | |
767 | mem->num_pages, | |
768 | mem->page_alignment, | |
769 | 1); | |
770 | if (unlikely(!node)) { | |
771 | spin_unlock(&bdev->lru_lock); | |
772 | break; | |
773 | } | |
774 | node = drm_mm_get_block_atomic(node, | |
775 | mem->num_pages, | |
776 | mem-> | |
777 | page_alignment); | |
778 | spin_unlock(&bdev->lru_lock); | |
779 | } while (!node); | |
780 | } | |
781 | if (node) | |
782 | break; | |
783 | } | |
784 | ||
785 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) { | |
786 | mem->mm_node = node; | |
787 | mem->mem_type = mem_type; | |
788 | mem->placement = cur_flags; | |
789 | return 0; | |
790 | } | |
791 | ||
792 | if (!type_found) | |
793 | return -EINVAL; | |
794 | ||
795 | num_prios = bdev->driver->num_mem_busy_prio; | |
796 | prios = bdev->driver->mem_busy_prio; | |
797 | ||
798 | for (i = 0; i < num_prios; ++i) { | |
799 | mem_type = prios[i]; | |
800 | man = &bdev->man[mem_type]; | |
801 | ||
802 | if (!man->has_type) | |
803 | continue; | |
804 | ||
805 | if (!ttm_bo_mt_compatible(man, | |
806 | bo->type == ttm_bo_type_user, | |
807 | mem_type, | |
808 | proposed_placement, &cur_flags)) | |
809 | continue; | |
810 | ||
ae3e8122 TH |
811 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
812 | cur_flags); | |
813 | ||
ba4e7d97 TH |
814 | ret = ttm_bo_mem_force_space(bdev, mem, mem_type, |
815 | interruptible, no_wait); | |
816 | ||
817 | if (ret == 0 && mem->mm_node) { | |
818 | mem->placement = cur_flags; | |
819 | return 0; | |
820 | } | |
821 | ||
822 | if (ret == -ERESTART) | |
823 | has_eagain = true; | |
824 | } | |
825 | ||
826 | ret = (has_eagain) ? -ERESTART : -ENOMEM; | |
827 | return ret; | |
828 | } | |
829 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
830 | ||
831 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
832 | { | |
833 | int ret = 0; | |
834 | ||
835 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) | |
836 | return -EBUSY; | |
837 | ||
838 | ret = wait_event_interruptible(bo->event_queue, | |
839 | atomic_read(&bo->cpu_writers) == 0); | |
840 | ||
841 | if (ret == -ERESTARTSYS) | |
842 | ret = -ERESTART; | |
843 | ||
844 | return ret; | |
845 | } | |
846 | ||
847 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
848 | uint32_t proposed_placement, | |
849 | bool interruptible, bool no_wait) | |
850 | { | |
851 | struct ttm_bo_device *bdev = bo->bdev; | |
852 | int ret = 0; | |
853 | struct ttm_mem_reg mem; | |
854 | ||
855 | BUG_ON(!atomic_read(&bo->reserved)); | |
856 | ||
857 | /* | |
858 | * FIXME: It's possible to pipeline buffer moves. | |
859 | * Have the driver move function wait for idle when necessary, | |
860 | * instead of doing it here. | |
861 | */ | |
862 | ||
863 | spin_lock(&bo->lock); | |
864 | ret = ttm_bo_wait(bo, false, interruptible, no_wait); | |
865 | spin_unlock(&bo->lock); | |
866 | ||
867 | if (ret) | |
868 | return ret; | |
869 | ||
870 | mem.num_pages = bo->num_pages; | |
871 | mem.size = mem.num_pages << PAGE_SHIFT; | |
872 | mem.page_alignment = bo->mem.page_alignment; | |
873 | ||
874 | /* | |
875 | * Determine where to move the buffer. | |
876 | */ | |
877 | ||
878 | ret = ttm_bo_mem_space(bo, proposed_placement, &mem, | |
879 | interruptible, no_wait); | |
880 | if (ret) | |
881 | goto out_unlock; | |
882 | ||
883 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait); | |
884 | ||
885 | out_unlock: | |
886 | if (ret && mem.mm_node) { | |
887 | spin_lock(&bdev->lru_lock); | |
888 | drm_mm_put_block(mem.mm_node); | |
889 | spin_unlock(&bdev->lru_lock); | |
890 | } | |
891 | return ret; | |
892 | } | |
893 | ||
894 | static int ttm_bo_mem_compat(uint32_t proposed_placement, | |
895 | struct ttm_mem_reg *mem) | |
896 | { | |
897 | if ((proposed_placement & mem->placement & TTM_PL_MASK_MEM) == 0) | |
898 | return 0; | |
899 | if ((proposed_placement & mem->placement & TTM_PL_MASK_CACHING) == 0) | |
900 | return 0; | |
901 | ||
902 | return 1; | |
903 | } | |
904 | ||
905 | int ttm_buffer_object_validate(struct ttm_buffer_object *bo, | |
906 | uint32_t proposed_placement, | |
907 | bool interruptible, bool no_wait) | |
908 | { | |
909 | int ret; | |
910 | ||
911 | BUG_ON(!atomic_read(&bo->reserved)); | |
912 | bo->proposed_placement = proposed_placement; | |
913 | ||
914 | TTM_DEBUG("Proposed placement 0x%08lx, Old flags 0x%08lx\n", | |
915 | (unsigned long)proposed_placement, | |
916 | (unsigned long)bo->mem.placement); | |
917 | ||
918 | /* | |
919 | * Check whether we need to move buffer. | |
920 | */ | |
921 | ||
922 | if (!ttm_bo_mem_compat(bo->proposed_placement, &bo->mem)) { | |
923 | ret = ttm_bo_move_buffer(bo, bo->proposed_placement, | |
924 | interruptible, no_wait); | |
925 | if (ret) { | |
926 | if (ret != -ERESTART) | |
927 | printk(KERN_ERR TTM_PFX | |
928 | "Failed moving buffer. " | |
929 | "Proposed placement 0x%08x\n", | |
930 | bo->proposed_placement); | |
931 | if (ret == -ENOMEM) | |
932 | printk(KERN_ERR TTM_PFX | |
933 | "Out of aperture space or " | |
934 | "DRM memory quota.\n"); | |
935 | return ret; | |
936 | } | |
937 | } | |
938 | ||
939 | /* | |
940 | * We might need to add a TTM. | |
941 | */ | |
942 | ||
943 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { | |
944 | ret = ttm_bo_add_ttm(bo, true); | |
945 | if (ret) | |
946 | return ret; | |
947 | } | |
948 | /* | |
949 | * Validation has succeeded, move the access and other | |
950 | * non-mapping-related flag bits from the proposed flags to | |
951 | * the active flags | |
952 | */ | |
953 | ||
954 | ttm_flag_masked(&bo->mem.placement, bo->proposed_placement, | |
955 | ~TTM_PL_MASK_MEMTYPE); | |
956 | ||
957 | return 0; | |
958 | } | |
959 | EXPORT_SYMBOL(ttm_buffer_object_validate); | |
960 | ||
961 | int | |
962 | ttm_bo_check_placement(struct ttm_buffer_object *bo, | |
963 | uint32_t set_flags, uint32_t clr_flags) | |
964 | { | |
965 | uint32_t new_mask = set_flags | clr_flags; | |
966 | ||
967 | if ((bo->type == ttm_bo_type_user) && | |
968 | (clr_flags & TTM_PL_FLAG_CACHED)) { | |
969 | printk(KERN_ERR TTM_PFX | |
970 | "User buffers require cache-coherent memory.\n"); | |
971 | return -EINVAL; | |
972 | } | |
973 | ||
974 | if (!capable(CAP_SYS_ADMIN)) { | |
975 | if (new_mask & TTM_PL_FLAG_NO_EVICT) { | |
976 | printk(KERN_ERR TTM_PFX "Need to be root to modify" | |
977 | " NO_EVICT status.\n"); | |
978 | return -EINVAL; | |
979 | } | |
980 | ||
981 | if ((clr_flags & bo->mem.placement & TTM_PL_MASK_MEMTYPE) && | |
982 | (bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
983 | printk(KERN_ERR TTM_PFX | |
984 | "Incompatible memory specification" | |
985 | " for NO_EVICT buffer.\n"); | |
986 | return -EINVAL; | |
987 | } | |
988 | } | |
989 | return 0; | |
990 | } | |
991 | ||
992 | int ttm_buffer_object_init(struct ttm_bo_device *bdev, | |
993 | struct ttm_buffer_object *bo, | |
994 | unsigned long size, | |
995 | enum ttm_bo_type type, | |
996 | uint32_t flags, | |
997 | uint32_t page_alignment, | |
998 | unsigned long buffer_start, | |
999 | bool interruptible, | |
1000 | struct file *persistant_swap_storage, | |
1001 | size_t acc_size, | |
1002 | void (*destroy) (struct ttm_buffer_object *)) | |
1003 | { | |
1004 | int ret = 0; | |
1005 | unsigned long num_pages; | |
1006 | ||
1007 | size += buffer_start & ~PAGE_MASK; | |
1008 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1009 | if (num_pages == 0) { | |
1010 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
1011 | return -EINVAL; | |
1012 | } | |
1013 | bo->destroy = destroy; | |
1014 | ||
1015 | spin_lock_init(&bo->lock); | |
1016 | kref_init(&bo->kref); | |
1017 | kref_init(&bo->list_kref); | |
1018 | atomic_set(&bo->cpu_writers, 0); | |
1019 | atomic_set(&bo->reserved, 1); | |
1020 | init_waitqueue_head(&bo->event_queue); | |
1021 | INIT_LIST_HEAD(&bo->lru); | |
1022 | INIT_LIST_HEAD(&bo->ddestroy); | |
1023 | INIT_LIST_HEAD(&bo->swap); | |
1024 | bo->bdev = bdev; | |
1025 | bo->type = type; | |
1026 | bo->num_pages = num_pages; | |
1027 | bo->mem.mem_type = TTM_PL_SYSTEM; | |
1028 | bo->mem.num_pages = bo->num_pages; | |
1029 | bo->mem.mm_node = NULL; | |
1030 | bo->mem.page_alignment = page_alignment; | |
1031 | bo->buffer_start = buffer_start & PAGE_MASK; | |
1032 | bo->priv_flags = 0; | |
1033 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1034 | bo->seq_valid = false; | |
1035 | bo->persistant_swap_storage = persistant_swap_storage; | |
1036 | bo->acc_size = acc_size; | |
1037 | ||
1038 | ret = ttm_bo_check_placement(bo, flags, 0ULL); | |
1039 | if (unlikely(ret != 0)) | |
1040 | goto out_err; | |
1041 | ||
1042 | /* | |
1043 | * If no caching attributes are set, accept any form of caching. | |
1044 | */ | |
1045 | ||
1046 | if ((flags & TTM_PL_MASK_CACHING) == 0) | |
1047 | flags |= TTM_PL_MASK_CACHING; | |
1048 | ||
1049 | /* | |
1050 | * For ttm_bo_type_device buffers, allocate | |
1051 | * address space from the device. | |
1052 | */ | |
1053 | ||
1054 | if (bo->type == ttm_bo_type_device) { | |
1055 | ret = ttm_bo_setup_vm(bo); | |
1056 | if (ret) | |
1057 | goto out_err; | |
1058 | } | |
1059 | ||
1060 | ret = ttm_buffer_object_validate(bo, flags, interruptible, false); | |
1061 | if (ret) | |
1062 | goto out_err; | |
1063 | ||
1064 | ttm_bo_unreserve(bo); | |
1065 | return 0; | |
1066 | ||
1067 | out_err: | |
1068 | ttm_bo_unreserve(bo); | |
1069 | ttm_bo_unref(&bo); | |
1070 | ||
1071 | return ret; | |
1072 | } | |
1073 | EXPORT_SYMBOL(ttm_buffer_object_init); | |
1074 | ||
1075 | static inline size_t ttm_bo_size(struct ttm_bo_device *bdev, | |
1076 | unsigned long num_pages) | |
1077 | { | |
1078 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1079 | PAGE_MASK; | |
1080 | ||
1081 | return bdev->ttm_bo_size + 2 * page_array_size; | |
1082 | } | |
1083 | ||
1084 | int ttm_buffer_object_create(struct ttm_bo_device *bdev, | |
1085 | unsigned long size, | |
1086 | enum ttm_bo_type type, | |
1087 | uint32_t flags, | |
1088 | uint32_t page_alignment, | |
1089 | unsigned long buffer_start, | |
1090 | bool interruptible, | |
1091 | struct file *persistant_swap_storage, | |
1092 | struct ttm_buffer_object **p_bo) | |
1093 | { | |
1094 | struct ttm_buffer_object *bo; | |
1095 | int ret; | |
1096 | struct ttm_mem_global *mem_glob = bdev->mem_glob; | |
1097 | ||
1098 | size_t acc_size = | |
1099 | ttm_bo_size(bdev, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); | |
1100 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false, false); | |
1101 | if (unlikely(ret != 0)) | |
1102 | return ret; | |
1103 | ||
1104 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1105 | ||
1106 | if (unlikely(bo == NULL)) { | |
1107 | ttm_mem_global_free(mem_glob, acc_size, false); | |
1108 | return -ENOMEM; | |
1109 | } | |
1110 | ||
1111 | ret = ttm_buffer_object_init(bdev, bo, size, type, flags, | |
1112 | page_alignment, buffer_start, | |
1113 | interruptible, | |
1114 | persistant_swap_storage, acc_size, NULL); | |
1115 | if (likely(ret == 0)) | |
1116 | *p_bo = bo; | |
1117 | ||
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | static int ttm_bo_leave_list(struct ttm_buffer_object *bo, | |
1122 | uint32_t mem_type, bool allow_errors) | |
1123 | { | |
1124 | int ret; | |
1125 | ||
1126 | spin_lock(&bo->lock); | |
1127 | ret = ttm_bo_wait(bo, false, false, false); | |
1128 | spin_unlock(&bo->lock); | |
1129 | ||
1130 | if (ret && allow_errors) | |
1131 | goto out; | |
1132 | ||
1133 | if (bo->mem.mem_type == mem_type) | |
1134 | ret = ttm_bo_evict(bo, mem_type, false, false); | |
1135 | ||
1136 | if (ret) { | |
1137 | if (allow_errors) { | |
1138 | goto out; | |
1139 | } else { | |
1140 | ret = 0; | |
1141 | printk(KERN_ERR TTM_PFX "Cleanup eviction failed\n"); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | out: | |
1146 | return ret; | |
1147 | } | |
1148 | ||
1149 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, | |
1150 | struct list_head *head, | |
1151 | unsigned mem_type, bool allow_errors) | |
1152 | { | |
1153 | struct ttm_buffer_object *entry; | |
1154 | int ret; | |
1155 | int put_count; | |
1156 | ||
1157 | /* | |
1158 | * Can't use standard list traversal since we're unlocking. | |
1159 | */ | |
1160 | ||
1161 | spin_lock(&bdev->lru_lock); | |
1162 | ||
1163 | while (!list_empty(head)) { | |
1164 | entry = list_first_entry(head, struct ttm_buffer_object, lru); | |
1165 | kref_get(&entry->list_kref); | |
1166 | ret = ttm_bo_reserve_locked(entry, false, false, false, 0); | |
1167 | put_count = ttm_bo_del_from_lru(entry); | |
1168 | spin_unlock(&bdev->lru_lock); | |
1169 | while (put_count--) | |
1170 | kref_put(&entry->list_kref, ttm_bo_ref_bug); | |
1171 | BUG_ON(ret); | |
1172 | ret = ttm_bo_leave_list(entry, mem_type, allow_errors); | |
1173 | ttm_bo_unreserve(entry); | |
1174 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
1175 | spin_lock(&bdev->lru_lock); | |
1176 | } | |
1177 | ||
1178 | spin_unlock(&bdev->lru_lock); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1184 | { | |
1185 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1186 | int ret = -EINVAL; | |
1187 | ||
1188 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1189 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1190 | return ret; | |
1191 | } | |
1192 | ||
1193 | if (!man->has_type) { | |
1194 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1195 | "memory manager type %u\n", mem_type); | |
1196 | return ret; | |
1197 | } | |
1198 | ||
1199 | man->use_type = false; | |
1200 | man->has_type = false; | |
1201 | ||
1202 | ret = 0; | |
1203 | if (mem_type > 0) { | |
1204 | ttm_bo_force_list_clean(bdev, &man->lru, mem_type, false); | |
1205 | ||
1206 | spin_lock(&bdev->lru_lock); | |
1207 | if (drm_mm_clean(&man->manager)) | |
1208 | drm_mm_takedown(&man->manager); | |
1209 | else | |
1210 | ret = -EBUSY; | |
1211 | ||
1212 | spin_unlock(&bdev->lru_lock); | |
1213 | } | |
1214 | ||
1215 | return ret; | |
1216 | } | |
1217 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1218 | ||
1219 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1220 | { | |
1221 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1222 | ||
1223 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1224 | printk(KERN_ERR TTM_PFX | |
1225 | "Illegal memory manager memory type %u.\n", | |
1226 | mem_type); | |
1227 | return -EINVAL; | |
1228 | } | |
1229 | ||
1230 | if (!man->has_type) { | |
1231 | printk(KERN_ERR TTM_PFX | |
1232 | "Memory type %u has not been initialized.\n", | |
1233 | mem_type); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | return ttm_bo_force_list_clean(bdev, &man->lru, mem_type, true); | |
1238 | } | |
1239 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1240 | ||
1241 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
1242 | unsigned long p_offset, unsigned long p_size) | |
1243 | { | |
1244 | int ret = -EINVAL; | |
1245 | struct ttm_mem_type_manager *man; | |
1246 | ||
1247 | if (type >= TTM_NUM_MEM_TYPES) { | |
1248 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); | |
1249 | return ret; | |
1250 | } | |
1251 | ||
1252 | man = &bdev->man[type]; | |
1253 | if (man->has_type) { | |
1254 | printk(KERN_ERR TTM_PFX | |
1255 | "Memory manager already initialized for type %d\n", | |
1256 | type); | |
1257 | return ret; | |
1258 | } | |
1259 | ||
1260 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1261 | if (ret) | |
1262 | return ret; | |
1263 | ||
1264 | ret = 0; | |
1265 | if (type != TTM_PL_SYSTEM) { | |
1266 | if (!p_size) { | |
1267 | printk(KERN_ERR TTM_PFX | |
1268 | "Zero size memory manager type %d\n", | |
1269 | type); | |
1270 | return ret; | |
1271 | } | |
1272 | ret = drm_mm_init(&man->manager, p_offset, p_size); | |
1273 | if (ret) | |
1274 | return ret; | |
1275 | } | |
1276 | man->has_type = true; | |
1277 | man->use_type = true; | |
1278 | man->size = p_size; | |
1279 | ||
1280 | INIT_LIST_HEAD(&man->lru); | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1285 | ||
1286 | int ttm_bo_device_release(struct ttm_bo_device *bdev) | |
1287 | { | |
1288 | int ret = 0; | |
1289 | unsigned i = TTM_NUM_MEM_TYPES; | |
1290 | struct ttm_mem_type_manager *man; | |
1291 | ||
1292 | while (i--) { | |
1293 | man = &bdev->man[i]; | |
1294 | if (man->has_type) { | |
1295 | man->use_type = false; | |
1296 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1297 | ret = -EBUSY; | |
1298 | printk(KERN_ERR TTM_PFX | |
1299 | "DRM memory manager type %d " | |
1300 | "is not clean.\n", i); | |
1301 | } | |
1302 | man->has_type = false; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | if (!cancel_delayed_work(&bdev->wq)) | |
1307 | flush_scheduled_work(); | |
1308 | ||
1309 | while (ttm_bo_delayed_delete(bdev, true)) | |
1310 | ; | |
1311 | ||
1312 | spin_lock(&bdev->lru_lock); | |
1313 | if (list_empty(&bdev->ddestroy)) | |
1314 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1315 | ||
1316 | if (list_empty(&bdev->man[0].lru)) | |
1317 | TTM_DEBUG("Swap list was clean\n"); | |
1318 | spin_unlock(&bdev->lru_lock); | |
1319 | ||
1320 | ttm_mem_unregister_shrink(bdev->mem_glob, &bdev->shrink); | |
1321 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); | |
1322 | write_lock(&bdev->vm_lock); | |
1323 | drm_mm_takedown(&bdev->addr_space_mm); | |
1324 | write_unlock(&bdev->vm_lock); | |
1325 | ||
1326 | __free_page(bdev->dummy_read_page); | |
1327 | return ret; | |
1328 | } | |
1329 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1330 | ||
1331 | /* | |
1332 | * This function is intended to be called on drm driver load. | |
1333 | * If you decide to call it from firstopen, you must protect the call | |
1334 | * from a potentially racing ttm_bo_driver_finish in lastclose. | |
1335 | * (This may happen on X server restart). | |
1336 | */ | |
1337 | ||
1338 | int ttm_bo_device_init(struct ttm_bo_device *bdev, | |
1339 | struct ttm_mem_global *mem_glob, | |
ad49f501 DA |
1340 | struct ttm_bo_driver *driver, uint64_t file_page_offset, |
1341 | bool need_dma32) | |
ba4e7d97 TH |
1342 | { |
1343 | int ret = -EINVAL; | |
1344 | ||
1345 | bdev->dummy_read_page = NULL; | |
1346 | rwlock_init(&bdev->vm_lock); | |
1347 | spin_lock_init(&bdev->lru_lock); | |
1348 | ||
1349 | bdev->driver = driver; | |
1350 | bdev->mem_glob = mem_glob; | |
1351 | ||
1352 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1353 | ||
1354 | bdev->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1355 | if (unlikely(bdev->dummy_read_page == NULL)) { | |
1356 | ret = -ENOMEM; | |
1357 | goto out_err0; | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * Initialize the system memory buffer type. | |
1362 | * Other types need to be driver / IOCTL initialized. | |
1363 | */ | |
1364 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0, 0); | |
1365 | if (unlikely(ret != 0)) | |
1366 | goto out_err1; | |
1367 | ||
1368 | bdev->addr_space_rb = RB_ROOT; | |
1369 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1370 | if (unlikely(ret != 0)) | |
1371 | goto out_err2; | |
1372 | ||
1373 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1374 | bdev->nice_mode = true; | |
1375 | INIT_LIST_HEAD(&bdev->ddestroy); | |
1376 | INIT_LIST_HEAD(&bdev->swap_lru); | |
1377 | bdev->dev_mapping = NULL; | |
ad49f501 | 1378 | bdev->need_dma32 = need_dma32; |
ba4e7d97 TH |
1379 | ttm_mem_init_shrink(&bdev->shrink, ttm_bo_swapout); |
1380 | ret = ttm_mem_register_shrink(mem_glob, &bdev->shrink); | |
1381 | if (unlikely(ret != 0)) { | |
1382 | printk(KERN_ERR TTM_PFX | |
1383 | "Could not register buffer object swapout.\n"); | |
1384 | goto out_err2; | |
1385 | } | |
1386 | ||
1387 | bdev->ttm_bo_extra_size = | |
1388 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1389 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1390 | ||
1391 | bdev->ttm_bo_size = bdev->ttm_bo_extra_size + | |
1392 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1393 | ||
1394 | return 0; | |
1395 | out_err2: | |
1396 | ttm_bo_clean_mm(bdev, 0); | |
1397 | out_err1: | |
1398 | __free_page(bdev->dummy_read_page); | |
1399 | out_err0: | |
1400 | return ret; | |
1401 | } | |
1402 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1403 | ||
1404 | /* | |
1405 | * buffer object vm functions. | |
1406 | */ | |
1407 | ||
1408 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1409 | { | |
1410 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1411 | ||
1412 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1413 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1414 | return false; | |
1415 | ||
1416 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1417 | return false; | |
1418 | ||
1419 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1420 | return false; | |
1421 | } | |
1422 | return true; | |
1423 | } | |
1424 | ||
1425 | int ttm_bo_pci_offset(struct ttm_bo_device *bdev, | |
1426 | struct ttm_mem_reg *mem, | |
1427 | unsigned long *bus_base, | |
1428 | unsigned long *bus_offset, unsigned long *bus_size) | |
1429 | { | |
1430 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1431 | ||
1432 | *bus_size = 0; | |
1433 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
1434 | return -EINVAL; | |
1435 | ||
1436 | if (ttm_mem_reg_is_pci(bdev, mem)) { | |
1437 | *bus_offset = mem->mm_node->start << PAGE_SHIFT; | |
1438 | *bus_size = mem->num_pages << PAGE_SHIFT; | |
1439 | *bus_base = man->io_offset; | |
1440 | } | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
1445 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1446 | { | |
1447 | struct ttm_bo_device *bdev = bo->bdev; | |
1448 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1449 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1450 | ||
1451 | if (!bdev->dev_mapping) | |
1452 | return; | |
1453 | ||
1454 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); | |
1455 | } | |
e024e110 | 1456 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1457 | |
1458 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1459 | { | |
1460 | struct ttm_bo_device *bdev = bo->bdev; | |
1461 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1462 | struct rb_node *parent = NULL; | |
1463 | struct ttm_buffer_object *cur_bo; | |
1464 | unsigned long offset = bo->vm_node->start; | |
1465 | unsigned long cur_offset; | |
1466 | ||
1467 | while (*cur) { | |
1468 | parent = *cur; | |
1469 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1470 | cur_offset = cur_bo->vm_node->start; | |
1471 | if (offset < cur_offset) | |
1472 | cur = &parent->rb_left; | |
1473 | else if (offset > cur_offset) | |
1474 | cur = &parent->rb_right; | |
1475 | else | |
1476 | BUG(); | |
1477 | } | |
1478 | ||
1479 | rb_link_node(&bo->vm_rb, parent, cur); | |
1480 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1481 | } | |
1482 | ||
1483 | /** | |
1484 | * ttm_bo_setup_vm: | |
1485 | * | |
1486 | * @bo: the buffer to allocate address space for | |
1487 | * | |
1488 | * Allocate address space in the drm device so that applications | |
1489 | * can mmap the buffer and access the contents. This only | |
1490 | * applies to ttm_bo_type_device objects as others are not | |
1491 | * placed in the drm device address space. | |
1492 | */ | |
1493 | ||
1494 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1495 | { | |
1496 | struct ttm_bo_device *bdev = bo->bdev; | |
1497 | int ret; | |
1498 | ||
1499 | retry_pre_get: | |
1500 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1501 | if (unlikely(ret != 0)) | |
1502 | return ret; | |
1503 | ||
1504 | write_lock(&bdev->vm_lock); | |
1505 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1506 | bo->mem.num_pages, 0, 0); | |
1507 | ||
1508 | if (unlikely(bo->vm_node == NULL)) { | |
1509 | ret = -ENOMEM; | |
1510 | goto out_unlock; | |
1511 | } | |
1512 | ||
1513 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1514 | bo->mem.num_pages, 0); | |
1515 | ||
1516 | if (unlikely(bo->vm_node == NULL)) { | |
1517 | write_unlock(&bdev->vm_lock); | |
1518 | goto retry_pre_get; | |
1519 | } | |
1520 | ||
1521 | ttm_bo_vm_insert_rb(bo); | |
1522 | write_unlock(&bdev->vm_lock); | |
1523 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1524 | ||
1525 | return 0; | |
1526 | out_unlock: | |
1527 | write_unlock(&bdev->vm_lock); | |
1528 | return ret; | |
1529 | } | |
1530 | ||
1531 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1532 | bool lazy, bool interruptible, bool no_wait) | |
1533 | { | |
1534 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1535 | void *sync_obj; | |
1536 | void *sync_obj_arg; | |
1537 | int ret = 0; | |
1538 | ||
1539 | if (likely(bo->sync_obj == NULL)) | |
1540 | return 0; | |
1541 | ||
1542 | while (bo->sync_obj) { | |
1543 | ||
1544 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1545 | void *tmp_obj = bo->sync_obj; | |
1546 | bo->sync_obj = NULL; | |
1547 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1548 | spin_unlock(&bo->lock); | |
1549 | driver->sync_obj_unref(&tmp_obj); | |
1550 | spin_lock(&bo->lock); | |
1551 | continue; | |
1552 | } | |
1553 | ||
1554 | if (no_wait) | |
1555 | return -EBUSY; | |
1556 | ||
1557 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1558 | sync_obj_arg = bo->sync_obj_arg; | |
1559 | spin_unlock(&bo->lock); | |
1560 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1561 | lazy, interruptible); | |
1562 | if (unlikely(ret != 0)) { | |
1563 | driver->sync_obj_unref(&sync_obj); | |
1564 | spin_lock(&bo->lock); | |
1565 | return ret; | |
1566 | } | |
1567 | spin_lock(&bo->lock); | |
1568 | if (likely(bo->sync_obj == sync_obj && | |
1569 | bo->sync_obj_arg == sync_obj_arg)) { | |
1570 | void *tmp_obj = bo->sync_obj; | |
1571 | bo->sync_obj = NULL; | |
1572 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1573 | &bo->priv_flags); | |
1574 | spin_unlock(&bo->lock); | |
1575 | driver->sync_obj_unref(&sync_obj); | |
1576 | driver->sync_obj_unref(&tmp_obj); | |
1577 | spin_lock(&bo->lock); | |
1578 | } | |
1579 | } | |
1580 | return 0; | |
1581 | } | |
1582 | EXPORT_SYMBOL(ttm_bo_wait); | |
1583 | ||
1584 | void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo) | |
1585 | { | |
1586 | atomic_set(&bo->reserved, 0); | |
1587 | wake_up_all(&bo->event_queue); | |
1588 | } | |
1589 | ||
1590 | int ttm_bo_block_reservation(struct ttm_buffer_object *bo, bool interruptible, | |
1591 | bool no_wait) | |
1592 | { | |
1593 | int ret; | |
1594 | ||
1595 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
1596 | if (no_wait) | |
1597 | return -EBUSY; | |
1598 | else if (interruptible) { | |
1599 | ret = wait_event_interruptible | |
1600 | (bo->event_queue, atomic_read(&bo->reserved) == 0); | |
1601 | if (unlikely(ret != 0)) | |
1602 | return -ERESTART; | |
1603 | } else { | |
1604 | wait_event(bo->event_queue, | |
1605 | atomic_read(&bo->reserved) == 0); | |
1606 | } | |
1607 | } | |
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) | |
1612 | { | |
1613 | int ret = 0; | |
1614 | ||
1615 | /* | |
1616 | * Using ttm_bo_reserve instead of ttm_bo_block_reservation | |
1617 | * makes sure the lru lists are updated. | |
1618 | */ | |
1619 | ||
1620 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1621 | if (unlikely(ret != 0)) | |
1622 | return ret; | |
1623 | spin_lock(&bo->lock); | |
1624 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1625 | spin_unlock(&bo->lock); | |
1626 | if (likely(ret == 0)) | |
1627 | atomic_inc(&bo->cpu_writers); | |
1628 | ttm_bo_unreserve(bo); | |
1629 | return ret; | |
1630 | } | |
1631 | ||
1632 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1633 | { | |
1634 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1635 | wake_up_all(&bo->event_queue); | |
1636 | } | |
1637 | ||
1638 | /** | |
1639 | * A buffer object shrink method that tries to swap out the first | |
1640 | * buffer object on the bo_global::swap_lru list. | |
1641 | */ | |
1642 | ||
1643 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1644 | { | |
1645 | struct ttm_bo_device *bdev = | |
1646 | container_of(shrink, struct ttm_bo_device, shrink); | |
1647 | struct ttm_buffer_object *bo; | |
1648 | int ret = -EBUSY; | |
1649 | int put_count; | |
1650 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1651 | ||
1652 | spin_lock(&bdev->lru_lock); | |
1653 | while (ret == -EBUSY) { | |
1654 | if (unlikely(list_empty(&bdev->swap_lru))) { | |
1655 | spin_unlock(&bdev->lru_lock); | |
1656 | return -EBUSY; | |
1657 | } | |
1658 | ||
1659 | bo = list_first_entry(&bdev->swap_lru, | |
1660 | struct ttm_buffer_object, swap); | |
1661 | kref_get(&bo->list_kref); | |
1662 | ||
1663 | /** | |
1664 | * Reserve buffer. Since we unlock while sleeping, we need | |
1665 | * to re-check that nobody removed us from the swap-list while | |
1666 | * we slept. | |
1667 | */ | |
1668 | ||
1669 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1670 | if (unlikely(ret == -EBUSY)) { | |
1671 | spin_unlock(&bdev->lru_lock); | |
1672 | ttm_bo_wait_unreserved(bo, false); | |
1673 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1674 | spin_lock(&bdev->lru_lock); | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | BUG_ON(ret != 0); | |
1679 | put_count = ttm_bo_del_from_lru(bo); | |
1680 | spin_unlock(&bdev->lru_lock); | |
1681 | ||
1682 | while (put_count--) | |
1683 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
1684 | ||
1685 | /** | |
1686 | * Wait for GPU, then move to system cached. | |
1687 | */ | |
1688 | ||
1689 | spin_lock(&bo->lock); | |
1690 | ret = ttm_bo_wait(bo, false, false, false); | |
1691 | spin_unlock(&bo->lock); | |
1692 | ||
1693 | if (unlikely(ret != 0)) | |
1694 | goto out; | |
1695 | ||
1696 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1697 | struct ttm_mem_reg evict_mem; | |
1698 | ||
1699 | evict_mem = bo->mem; | |
1700 | evict_mem.mm_node = NULL; | |
1701 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1702 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1703 | ||
1704 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
1705 | false, false); | |
1706 | if (unlikely(ret != 0)) | |
1707 | goto out; | |
1708 | } | |
1709 | ||
1710 | ttm_bo_unmap_virtual(bo); | |
1711 | ||
1712 | /** | |
1713 | * Swap out. Buffer will be swapped in again as soon as | |
1714 | * anyone tries to access a ttm page. | |
1715 | */ | |
1716 | ||
1717 | ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage); | |
1718 | out: | |
1719 | ||
1720 | /** | |
1721 | * | |
1722 | * Unreserve without putting on LRU to avoid swapping out an | |
1723 | * already swapped buffer. | |
1724 | */ | |
1725 | ||
1726 | atomic_set(&bo->reserved, 0); | |
1727 | wake_up_all(&bo->event_queue); | |
1728 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1729 | return ret; | |
1730 | } | |
1731 | ||
1732 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1733 | { | |
1734 | while (ttm_bo_swapout(&bdev->shrink) == 0) | |
1735 | ; | |
1736 | } |