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ba4e7d97 TH |
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 | */ | |
ca262a99 JG |
30 | /* Notes: |
31 | * | |
32 | * We store bo pointer in drm_mm_node struct so we know which bo own a | |
33 | * specific node. There is no protection on the pointer, thus to make | |
34 | * sure things don't go berserk you have to access this pointer while | |
35 | * holding the global lru lock and make sure anytime you free a node you | |
36 | * reset the pointer to NULL. | |
37 | */ | |
ba4e7d97 TH |
38 | |
39 | #include "ttm/ttm_module.h" | |
40 | #include "ttm/ttm_bo_driver.h" | |
41 | #include "ttm/ttm_placement.h" | |
42 | #include <linux/jiffies.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/mm.h> | |
46 | #include <linux/file.h> | |
47 | #include <linux/module.h> | |
48 | ||
49 | #define TTM_ASSERT_LOCKED(param) | |
50 | #define TTM_DEBUG(fmt, arg...) | |
51 | #define TTM_BO_HASH_ORDER 13 | |
52 | ||
53 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 | 54 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
a987fcaa TH |
55 | static void ttm_bo_global_kobj_release(struct kobject *kobj); |
56 | ||
57 | static struct attribute ttm_bo_count = { | |
58 | .name = "bo_count", | |
59 | .mode = S_IRUGO | |
60 | }; | |
61 | ||
62 | static ssize_t ttm_bo_global_show(struct kobject *kobj, | |
63 | struct attribute *attr, | |
64 | char *buffer) | |
65 | { | |
66 | struct ttm_bo_global *glob = | |
67 | container_of(kobj, struct ttm_bo_global, kobj); | |
68 | ||
69 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
70 | (unsigned long) atomic_read(&glob->bo_count)); | |
71 | } | |
72 | ||
73 | static struct attribute *ttm_bo_global_attrs[] = { | |
74 | &ttm_bo_count, | |
75 | NULL | |
76 | }; | |
77 | ||
78 | static struct sysfs_ops ttm_bo_global_ops = { | |
79 | .show = &ttm_bo_global_show | |
80 | }; | |
81 | ||
82 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
83 | .release = &ttm_bo_global_kobj_release, | |
84 | .sysfs_ops = &ttm_bo_global_ops, | |
85 | .default_attrs = ttm_bo_global_attrs | |
86 | }; | |
87 | ||
ba4e7d97 TH |
88 | |
89 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
90 | { | |
91 | return 1 << (type); | |
92 | } | |
93 | ||
94 | static void ttm_bo_release_list(struct kref *list_kref) | |
95 | { | |
96 | struct ttm_buffer_object *bo = | |
97 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
98 | struct ttm_bo_device *bdev = bo->bdev; | |
99 | ||
100 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
101 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
102 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
103 | BUG_ON(bo->sync_obj != NULL); | |
104 | BUG_ON(bo->mem.mm_node != NULL); | |
105 | BUG_ON(!list_empty(&bo->lru)); | |
106 | BUG_ON(!list_empty(&bo->ddestroy)); | |
107 | ||
108 | if (bo->ttm) | |
109 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 110 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
111 | if (bo->destroy) |
112 | bo->destroy(bo); | |
113 | else { | |
a987fcaa | 114 | ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size); |
ba4e7d97 TH |
115 | kfree(bo); |
116 | } | |
117 | } | |
118 | ||
119 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
120 | { | |
121 | ||
122 | if (interruptible) { | |
123 | int ret = 0; | |
124 | ||
125 | ret = wait_event_interruptible(bo->event_queue, | |
126 | atomic_read(&bo->reserved) == 0); | |
127 | if (unlikely(ret != 0)) | |
98ffc415 | 128 | return ret; |
ba4e7d97 TH |
129 | } else { |
130 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
136 | { | |
137 | struct ttm_bo_device *bdev = bo->bdev; | |
138 | struct ttm_mem_type_manager *man; | |
139 | ||
140 | BUG_ON(!atomic_read(&bo->reserved)); | |
141 | ||
142 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
143 | ||
144 | BUG_ON(!list_empty(&bo->lru)); | |
145 | ||
146 | man = &bdev->man[bo->mem.mem_type]; | |
147 | list_add_tail(&bo->lru, &man->lru); | |
148 | kref_get(&bo->list_kref); | |
149 | ||
150 | if (bo->ttm != NULL) { | |
a987fcaa | 151 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
152 | kref_get(&bo->list_kref); |
153 | } | |
154 | } | |
155 | } | |
156 | ||
157 | /** | |
158 | * Call with the lru_lock held. | |
159 | */ | |
160 | ||
161 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
162 | { | |
163 | int put_count = 0; | |
164 | ||
165 | if (!list_empty(&bo->swap)) { | |
166 | list_del_init(&bo->swap); | |
167 | ++put_count; | |
168 | } | |
169 | if (!list_empty(&bo->lru)) { | |
170 | list_del_init(&bo->lru); | |
171 | ++put_count; | |
172 | } | |
173 | ||
174 | /* | |
175 | * TODO: Add a driver hook to delete from | |
176 | * driver-specific LRU's here. | |
177 | */ | |
178 | ||
179 | return put_count; | |
180 | } | |
181 | ||
182 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
183 | bool interruptible, | |
184 | bool no_wait, bool use_sequence, uint32_t sequence) | |
185 | { | |
a987fcaa | 186 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
187 | int ret; |
188 | ||
189 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
190 | if (use_sequence && bo->seq_valid && | |
191 | (sequence - bo->val_seq < (1 << 31))) { | |
192 | return -EAGAIN; | |
193 | } | |
194 | ||
195 | if (no_wait) | |
196 | return -EBUSY; | |
197 | ||
a987fcaa | 198 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 199 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 200 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
201 | |
202 | if (unlikely(ret)) | |
203 | return ret; | |
204 | } | |
205 | ||
206 | if (use_sequence) { | |
207 | bo->val_seq = sequence; | |
208 | bo->seq_valid = true; | |
209 | } else { | |
210 | bo->seq_valid = false; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | EXPORT_SYMBOL(ttm_bo_reserve); | |
216 | ||
217 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
218 | { | |
219 | BUG(); | |
220 | } | |
221 | ||
222 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
223 | bool interruptible, | |
224 | bool no_wait, bool use_sequence, uint32_t sequence) | |
225 | { | |
a987fcaa | 226 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
227 | int put_count = 0; |
228 | int ret; | |
229 | ||
a987fcaa | 230 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
231 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
232 | sequence); | |
233 | if (likely(ret == 0)) | |
234 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 235 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
236 | |
237 | while (put_count--) | |
238 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
239 | ||
240 | return ret; | |
241 | } | |
242 | ||
243 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
244 | { | |
a987fcaa | 245 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 246 | |
a987fcaa | 247 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
248 | ttm_bo_add_to_lru(bo); |
249 | atomic_set(&bo->reserved, 0); | |
250 | wake_up_all(&bo->event_queue); | |
a987fcaa | 251 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
252 | } |
253 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
254 | ||
255 | /* | |
256 | * Call bo->mutex locked. | |
257 | */ | |
ba4e7d97 TH |
258 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
259 | { | |
260 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 261 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
262 | int ret = 0; |
263 | uint32_t page_flags = 0; | |
264 | ||
265 | TTM_ASSERT_LOCKED(&bo->mutex); | |
266 | bo->ttm = NULL; | |
267 | ||
ad49f501 DA |
268 | if (bdev->need_dma32) |
269 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
270 | ||
ba4e7d97 TH |
271 | switch (bo->type) { |
272 | case ttm_bo_type_device: | |
273 | if (zero_alloc) | |
274 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
275 | case ttm_bo_type_kernel: | |
276 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 277 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
278 | if (unlikely(bo->ttm == NULL)) |
279 | ret = -ENOMEM; | |
280 | break; | |
281 | case ttm_bo_type_user: | |
282 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
283 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 284 | glob->dummy_read_page); |
447aeb90 | 285 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 286 | ret = -ENOMEM; |
447aeb90 DA |
287 | break; |
288 | } | |
ba4e7d97 TH |
289 | |
290 | ret = ttm_tt_set_user(bo->ttm, current, | |
291 | bo->buffer_start, bo->num_pages); | |
292 | if (unlikely(ret != 0)) | |
293 | ttm_tt_destroy(bo->ttm); | |
294 | break; | |
295 | default: | |
296 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
297 | ret = -EINVAL; | |
298 | break; | |
299 | } | |
300 | ||
301 | return ret; | |
302 | } | |
303 | ||
304 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
305 | struct ttm_mem_reg *mem, | |
306 | bool evict, bool interruptible, bool no_wait) | |
307 | { | |
308 | struct ttm_bo_device *bdev = bo->bdev; | |
309 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
310 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
311 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
312 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
313 | int ret = 0; | |
314 | ||
315 | if (old_is_pci || new_is_pci || | |
316 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
317 | ttm_bo_unmap_virtual(bo); | |
318 | ||
319 | /* | |
320 | * Create and bind a ttm if required. | |
321 | */ | |
322 | ||
323 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
324 | ret = ttm_bo_add_ttm(bo, false); | |
325 | if (ret) | |
326 | goto out_err; | |
327 | ||
328 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
329 | if (ret) | |
87ef9209 | 330 | goto out_err; |
ba4e7d97 TH |
331 | |
332 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
333 | ret = ttm_tt_bind(bo->ttm, mem); | |
334 | if (ret) | |
335 | goto out_err; | |
336 | } | |
337 | ||
338 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 339 | bo->mem = *mem; |
ba4e7d97 | 340 | mem->mm_node = NULL; |
ba4e7d97 TH |
341 | goto moved; |
342 | } | |
343 | ||
344 | } | |
345 | ||
e024e110 DA |
346 | if (bdev->driver->move_notify) |
347 | bdev->driver->move_notify(bo, mem); | |
348 | ||
ba4e7d97 TH |
349 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
350 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
351 | ret = ttm_bo_move_ttm(bo, evict, no_wait, mem); | |
352 | else if (bdev->driver->move) | |
353 | ret = bdev->driver->move(bo, evict, interruptible, | |
354 | no_wait, mem); | |
355 | else | |
356 | ret = ttm_bo_move_memcpy(bo, evict, no_wait, mem); | |
357 | ||
358 | if (ret) | |
359 | goto out_err; | |
360 | ||
361 | moved: | |
362 | if (bo->evicted) { | |
363 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
364 | if (ret) | |
365 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
366 | bo->evicted = false; | |
367 | } | |
368 | ||
369 | if (bo->mem.mm_node) { | |
370 | spin_lock(&bo->lock); | |
371 | bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) + | |
372 | bdev->man[bo->mem.mem_type].gpu_offset; | |
373 | bo->cur_placement = bo->mem.placement; | |
374 | spin_unlock(&bo->lock); | |
375 | } | |
376 | ||
377 | return 0; | |
378 | ||
379 | out_err: | |
380 | new_man = &bdev->man[bo->mem.mem_type]; | |
381 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
382 | ttm_tt_unbind(bo->ttm); | |
383 | ttm_tt_destroy(bo->ttm); | |
384 | bo->ttm = NULL; | |
385 | } | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
390 | /** | |
391 | * If bo idle, remove from delayed- and lru lists, and unref. | |
392 | * If not idle, and already on delayed list, do nothing. | |
393 | * If not idle, and not on delayed list, put on delayed list, | |
394 | * up the list_kref and schedule a delayed list check. | |
395 | */ | |
396 | ||
397 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all) | |
398 | { | |
399 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 400 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
401 | struct ttm_bo_driver *driver = bdev->driver; |
402 | int ret; | |
403 | ||
404 | spin_lock(&bo->lock); | |
405 | (void) ttm_bo_wait(bo, false, false, !remove_all); | |
406 | ||
407 | if (!bo->sync_obj) { | |
408 | int put_count; | |
409 | ||
410 | spin_unlock(&bo->lock); | |
411 | ||
a987fcaa | 412 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
413 | ret = ttm_bo_reserve_locked(bo, false, false, false, 0); |
414 | BUG_ON(ret); | |
415 | if (bo->ttm) | |
416 | ttm_tt_unbind(bo->ttm); | |
417 | ||
418 | if (!list_empty(&bo->ddestroy)) { | |
419 | list_del_init(&bo->ddestroy); | |
420 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
421 | } | |
422 | if (bo->mem.mm_node) { | |
ca262a99 | 423 | bo->mem.mm_node->private = NULL; |
ba4e7d97 TH |
424 | drm_mm_put_block(bo->mem.mm_node); |
425 | bo->mem.mm_node = NULL; | |
426 | } | |
427 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 428 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
429 | |
430 | atomic_set(&bo->reserved, 0); | |
431 | ||
432 | while (put_count--) | |
433 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
a987fcaa | 438 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
439 | if (list_empty(&bo->ddestroy)) { |
440 | void *sync_obj = bo->sync_obj; | |
441 | void *sync_obj_arg = bo->sync_obj_arg; | |
442 | ||
443 | kref_get(&bo->list_kref); | |
444 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
a987fcaa | 445 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
446 | spin_unlock(&bo->lock); |
447 | ||
448 | if (sync_obj) | |
449 | driver->sync_obj_flush(sync_obj, sync_obj_arg); | |
450 | schedule_delayed_work(&bdev->wq, | |
451 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
452 | ret = 0; | |
453 | ||
454 | } else { | |
a987fcaa | 455 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
456 | spin_unlock(&bo->lock); |
457 | ret = -EBUSY; | |
458 | } | |
459 | ||
460 | return ret; | |
461 | } | |
462 | ||
463 | /** | |
464 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
465 | * encountered buffers. | |
466 | */ | |
467 | ||
468 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
469 | { | |
a987fcaa | 470 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
471 | struct ttm_buffer_object *entry, *nentry; |
472 | struct list_head *list, *next; | |
473 | int ret; | |
474 | ||
a987fcaa | 475 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
476 | list_for_each_safe(list, next, &bdev->ddestroy) { |
477 | entry = list_entry(list, struct ttm_buffer_object, ddestroy); | |
478 | nentry = NULL; | |
479 | ||
480 | /* | |
481 | * Protect the next list entry from destruction while we | |
482 | * unlock the lru_lock. | |
483 | */ | |
484 | ||
485 | if (next != &bdev->ddestroy) { | |
486 | nentry = list_entry(next, struct ttm_buffer_object, | |
487 | ddestroy); | |
488 | kref_get(&nentry->list_kref); | |
489 | } | |
490 | kref_get(&entry->list_kref); | |
491 | ||
a987fcaa | 492 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
493 | ret = ttm_bo_cleanup_refs(entry, remove_all); |
494 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
495 | ||
a987fcaa | 496 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
497 | if (nentry) { |
498 | bool next_onlist = !list_empty(next); | |
a987fcaa | 499 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 500 | kref_put(&nentry->list_kref, ttm_bo_release_list); |
a987fcaa | 501 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
502 | /* |
503 | * Someone might have raced us and removed the | |
504 | * next entry from the list. We don't bother restarting | |
505 | * list traversal. | |
506 | */ | |
507 | ||
508 | if (!next_onlist) | |
509 | break; | |
510 | } | |
511 | if (ret) | |
512 | break; | |
513 | } | |
514 | ret = !list_empty(&bdev->ddestroy); | |
a987fcaa | 515 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
516 | |
517 | return ret; | |
518 | } | |
519 | ||
520 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
521 | { | |
522 | struct ttm_bo_device *bdev = | |
523 | container_of(work, struct ttm_bo_device, wq.work); | |
524 | ||
525 | if (ttm_bo_delayed_delete(bdev, false)) { | |
526 | schedule_delayed_work(&bdev->wq, | |
527 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
528 | } | |
529 | } | |
530 | ||
531 | static void ttm_bo_release(struct kref *kref) | |
532 | { | |
533 | struct ttm_buffer_object *bo = | |
534 | container_of(kref, struct ttm_buffer_object, kref); | |
535 | struct ttm_bo_device *bdev = bo->bdev; | |
536 | ||
537 | if (likely(bo->vm_node != NULL)) { | |
538 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
539 | drm_mm_put_block(bo->vm_node); | |
540 | bo->vm_node = NULL; | |
541 | } | |
542 | write_unlock(&bdev->vm_lock); | |
543 | ttm_bo_cleanup_refs(bo, false); | |
544 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
545 | write_lock(&bdev->vm_lock); | |
546 | } | |
547 | ||
548 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
549 | { | |
550 | struct ttm_buffer_object *bo = *p_bo; | |
551 | struct ttm_bo_device *bdev = bo->bdev; | |
552 | ||
553 | *p_bo = NULL; | |
554 | write_lock(&bdev->vm_lock); | |
555 | kref_put(&bo->kref, ttm_bo_release); | |
556 | write_unlock(&bdev->vm_lock); | |
557 | } | |
558 | EXPORT_SYMBOL(ttm_bo_unref); | |
559 | ||
ca262a99 JG |
560 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
561 | bool no_wait) | |
ba4e7d97 | 562 | { |
ba4e7d97 | 563 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 564 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 565 | struct ttm_mem_reg evict_mem; |
ca262a99 JG |
566 | struct ttm_placement placement; |
567 | int ret = 0; | |
ba4e7d97 TH |
568 | |
569 | spin_lock(&bo->lock); | |
570 | ret = ttm_bo_wait(bo, false, interruptible, no_wait); | |
571 | spin_unlock(&bo->lock); | |
572 | ||
78ecf091 | 573 | if (unlikely(ret != 0)) { |
98ffc415 | 574 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
575 | printk(KERN_ERR TTM_PFX |
576 | "Failed to expire sync object before " | |
577 | "buffer eviction.\n"); | |
578 | } | |
ba4e7d97 TH |
579 | goto out; |
580 | } | |
581 | ||
582 | BUG_ON(!atomic_read(&bo->reserved)); | |
583 | ||
584 | evict_mem = bo->mem; | |
585 | evict_mem.mm_node = NULL; | |
586 | ||
7cb7d1d7 JG |
587 | placement.fpfn = 0; |
588 | placement.lpfn = 0; | |
589 | placement.num_placement = 0; | |
590 | placement.num_busy_placement = 0; | |
ca262a99 JG |
591 | bdev->driver->evict_flags(bo, &placement); |
592 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
593 | no_wait); | |
ba4e7d97 | 594 | if (ret) { |
98ffc415 | 595 | if (ret != -ERESTARTSYS) |
ba4e7d97 TH |
596 | printk(KERN_ERR TTM_PFX |
597 | "Failed to find memory space for " | |
598 | "buffer 0x%p eviction.\n", bo); | |
599 | goto out; | |
600 | } | |
601 | ||
602 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
603 | no_wait); | |
604 | if (ret) { | |
98ffc415 | 605 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 606 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
ca262a99 JG |
607 | spin_lock(&glob->lru_lock); |
608 | if (evict_mem.mm_node) { | |
609 | evict_mem.mm_node->private = NULL; | |
610 | drm_mm_put_block(evict_mem.mm_node); | |
611 | evict_mem.mm_node = NULL; | |
612 | } | |
613 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
614 | goto out; |
615 | } | |
ca262a99 JG |
616 | bo->evicted = true; |
617 | out: | |
618 | return ret; | |
619 | } | |
620 | ||
621 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
622 | uint32_t mem_type, | |
623 | bool interruptible, bool no_wait) | |
624 | { | |
625 | struct ttm_bo_global *glob = bdev->glob; | |
626 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
627 | struct ttm_buffer_object *bo; | |
628 | int ret, put_count = 0; | |
ba4e7d97 | 629 | |
a987fcaa | 630 | spin_lock(&glob->lru_lock); |
ca262a99 JG |
631 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
632 | kref_get(&bo->list_kref); | |
633 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, false, 0); | |
634 | if (likely(ret == 0)) | |
635 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 636 | spin_unlock(&glob->lru_lock); |
ca262a99 JG |
637 | if (unlikely(ret != 0)) |
638 | return ret; | |
639 | while (put_count--) | |
640 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
641 | ret = ttm_bo_evict(bo, interruptible, no_wait); | |
642 | ttm_bo_unreserve(bo); | |
643 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
644 | return ret; |
645 | } | |
646 | ||
ca262a99 JG |
647 | static int ttm_bo_man_get_node(struct ttm_buffer_object *bo, |
648 | struct ttm_mem_type_manager *man, | |
649 | struct ttm_placement *placement, | |
650 | struct ttm_mem_reg *mem, | |
651 | struct drm_mm_node **node) | |
652 | { | |
653 | struct ttm_bo_global *glob = bo->glob; | |
654 | unsigned long lpfn; | |
655 | int ret; | |
656 | ||
657 | lpfn = placement->lpfn; | |
658 | if (!lpfn) | |
659 | lpfn = man->size; | |
660 | *node = NULL; | |
661 | do { | |
662 | ret = drm_mm_pre_get(&man->manager); | |
663 | if (unlikely(ret)) | |
664 | return ret; | |
665 | ||
666 | spin_lock(&glob->lru_lock); | |
667 | *node = drm_mm_search_free_in_range(&man->manager, | |
668 | mem->num_pages, mem->page_alignment, | |
669 | placement->fpfn, lpfn, 1); | |
670 | if (unlikely(*node == NULL)) { | |
671 | spin_unlock(&glob->lru_lock); | |
672 | return 0; | |
673 | } | |
674 | *node = drm_mm_get_block_atomic_range(*node, mem->num_pages, | |
675 | mem->page_alignment, | |
676 | placement->fpfn, | |
677 | lpfn); | |
678 | spin_unlock(&glob->lru_lock); | |
679 | } while (*node == NULL); | |
680 | return 0; | |
681 | } | |
682 | ||
ba4e7d97 TH |
683 | /** |
684 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
685 | * space, or we've evicted everything and there isn't enough space. | |
686 | */ | |
ca262a99 JG |
687 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
688 | uint32_t mem_type, | |
689 | struct ttm_placement *placement, | |
690 | struct ttm_mem_reg *mem, | |
691 | bool interruptible, bool no_wait) | |
ba4e7d97 | 692 | { |
ca262a99 | 693 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 694 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 695 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ca262a99 | 696 | struct drm_mm_node *node; |
ba4e7d97 TH |
697 | int ret; |
698 | ||
ba4e7d97 | 699 | do { |
ca262a99 JG |
700 | ret = ttm_bo_man_get_node(bo, man, placement, mem, &node); |
701 | if (unlikely(ret != 0)) | |
702 | return ret; | |
ba4e7d97 TH |
703 | if (node) |
704 | break; | |
ca262a99 JG |
705 | spin_lock(&glob->lru_lock); |
706 | if (list_empty(&man->lru)) { | |
707 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 | 708 | break; |
ca262a99 | 709 | } |
a987fcaa | 710 | spin_unlock(&glob->lru_lock); |
ca262a99 JG |
711 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
712 | no_wait); | |
ba4e7d97 TH |
713 | if (unlikely(ret != 0)) |
714 | return ret; | |
ba4e7d97 | 715 | } while (1); |
ca262a99 | 716 | if (node == NULL) |
ba4e7d97 | 717 | return -ENOMEM; |
ba4e7d97 TH |
718 | mem->mm_node = node; |
719 | mem->mem_type = mem_type; | |
720 | return 0; | |
721 | } | |
722 | ||
ae3e8122 TH |
723 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
724 | uint32_t cur_placement, | |
725 | uint32_t proposed_placement) | |
726 | { | |
727 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
728 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
729 | ||
730 | /** | |
731 | * Keep current caching if possible. | |
732 | */ | |
733 | ||
734 | if ((cur_placement & caching) != 0) | |
735 | result |= (cur_placement & caching); | |
736 | else if ((man->default_caching & caching) != 0) | |
737 | result |= man->default_caching; | |
738 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
739 | result |= TTM_PL_FLAG_CACHED; | |
740 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
741 | result |= TTM_PL_FLAG_WC; | |
742 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
743 | result |= TTM_PL_FLAG_UNCACHED; | |
744 | ||
745 | return result; | |
746 | } | |
747 | ||
ba4e7d97 TH |
748 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
749 | bool disallow_fixed, | |
750 | uint32_t mem_type, | |
ae3e8122 TH |
751 | uint32_t proposed_placement, |
752 | uint32_t *masked_placement) | |
ba4e7d97 TH |
753 | { |
754 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
755 | ||
756 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
757 | return false; | |
758 | ||
ae3e8122 | 759 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
760 | return false; |
761 | ||
ae3e8122 | 762 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 763 | return false; |
ba4e7d97 | 764 | |
ae3e8122 TH |
765 | cur_flags |= (proposed_placement & man->available_caching); |
766 | ||
767 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
768 | return true; |
769 | } | |
770 | ||
ca262a99 JG |
771 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
772 | { | |
773 | int i; | |
774 | ||
775 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
776 | if (flags & (1 << i)) { | |
777 | *mem_type = i; | |
778 | return 0; | |
779 | } | |
780 | return -EINVAL; | |
781 | } | |
782 | ||
ba4e7d97 TH |
783 | /** |
784 | * Creates space for memory region @mem according to its type. | |
785 | * | |
786 | * This function first searches for free space in compatible memory types in | |
787 | * the priority order defined by the driver. If free space isn't found, then | |
788 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
789 | * space. | |
790 | */ | |
791 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
792 | struct ttm_placement *placement, |
793 | struct ttm_mem_reg *mem, | |
794 | bool interruptible, bool no_wait) | |
ba4e7d97 TH |
795 | { |
796 | struct ttm_bo_device *bdev = bo->bdev; | |
797 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
798 | uint32_t mem_type = TTM_PL_SYSTEM; |
799 | uint32_t cur_flags = 0; | |
800 | bool type_found = false; | |
801 | bool type_ok = false; | |
98ffc415 | 802 | bool has_erestartsys = false; |
ba4e7d97 | 803 | struct drm_mm_node *node = NULL; |
ca262a99 | 804 | int i, ret; |
ba4e7d97 TH |
805 | |
806 | mem->mm_node = NULL; | |
ca262a99 JG |
807 | for (i = 0; i <= placement->num_placement; ++i) { |
808 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
809 | &mem_type); | |
810 | if (ret) | |
811 | return ret; | |
ba4e7d97 TH |
812 | man = &bdev->man[mem_type]; |
813 | ||
814 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
815 | bo->type == ttm_bo_type_user, |
816 | mem_type, | |
817 | placement->placement[i], | |
818 | &cur_flags); | |
ba4e7d97 TH |
819 | |
820 | if (!type_ok) | |
821 | continue; | |
822 | ||
ae3e8122 TH |
823 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
824 | cur_flags); | |
ca262a99 JG |
825 | /* |
826 | * Use the access and other non-mapping-related flag bits from | |
827 | * the memory placement flags to the current flags | |
828 | */ | |
829 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
830 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 831 | |
ba4e7d97 TH |
832 | if (mem_type == TTM_PL_SYSTEM) |
833 | break; | |
834 | ||
835 | if (man->has_type && man->use_type) { | |
836 | type_found = true; | |
ca262a99 JG |
837 | ret = ttm_bo_man_get_node(bo, man, placement, mem, |
838 | &node); | |
839 | if (unlikely(ret)) | |
840 | return ret; | |
ba4e7d97 TH |
841 | } |
842 | if (node) | |
843 | break; | |
844 | } | |
845 | ||
846 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) { | |
847 | mem->mm_node = node; | |
848 | mem->mem_type = mem_type; | |
849 | mem->placement = cur_flags; | |
ca262a99 JG |
850 | if (node) |
851 | node->private = bo; | |
ba4e7d97 TH |
852 | return 0; |
853 | } | |
854 | ||
855 | if (!type_found) | |
856 | return -EINVAL; | |
857 | ||
ca262a99 JG |
858 | for (i = 0; i <= placement->num_busy_placement; ++i) { |
859 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
860 | &mem_type); | |
861 | if (ret) | |
862 | return ret; | |
ba4e7d97 | 863 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
864 | if (!man->has_type) |
865 | continue; | |
ba4e7d97 | 866 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
867 | bo->type == ttm_bo_type_user, |
868 | mem_type, | |
869 | placement->placement[i], | |
870 | &cur_flags)) | |
ba4e7d97 TH |
871 | continue; |
872 | ||
ae3e8122 TH |
873 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
874 | cur_flags); | |
ca262a99 JG |
875 | /* |
876 | * Use the access and other non-mapping-related flag bits from | |
877 | * the memory placement flags to the current flags | |
878 | */ | |
879 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
880 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 881 | |
ca262a99 JG |
882 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
883 | interruptible, no_wait); | |
ba4e7d97 TH |
884 | if (ret == 0 && mem->mm_node) { |
885 | mem->placement = cur_flags; | |
ca262a99 | 886 | mem->mm_node->private = bo; |
ba4e7d97 TH |
887 | return 0; |
888 | } | |
98ffc415 TH |
889 | if (ret == -ERESTARTSYS) |
890 | has_erestartsys = true; | |
ba4e7d97 | 891 | } |
98ffc415 | 892 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
893 | return ret; |
894 | } | |
895 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
896 | ||
897 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
898 | { | |
ba4e7d97 TH |
899 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
900 | return -EBUSY; | |
901 | ||
98ffc415 TH |
902 | return wait_event_interruptible(bo->event_queue, |
903 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 TH |
904 | } |
905 | ||
906 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 JG |
907 | struct ttm_placement *placement, |
908 | bool interruptible, bool no_wait) | |
ba4e7d97 | 909 | { |
a987fcaa | 910 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
911 | int ret = 0; |
912 | struct ttm_mem_reg mem; | |
913 | ||
914 | BUG_ON(!atomic_read(&bo->reserved)); | |
915 | ||
916 | /* | |
917 | * FIXME: It's possible to pipeline buffer moves. | |
918 | * Have the driver move function wait for idle when necessary, | |
919 | * instead of doing it here. | |
920 | */ | |
ba4e7d97 TH |
921 | spin_lock(&bo->lock); |
922 | ret = ttm_bo_wait(bo, false, interruptible, no_wait); | |
923 | spin_unlock(&bo->lock); | |
ba4e7d97 TH |
924 | if (ret) |
925 | return ret; | |
ba4e7d97 TH |
926 | mem.num_pages = bo->num_pages; |
927 | mem.size = mem.num_pages << PAGE_SHIFT; | |
928 | mem.page_alignment = bo->mem.page_alignment; | |
ba4e7d97 TH |
929 | /* |
930 | * Determine where to move the buffer. | |
931 | */ | |
ca262a99 | 932 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait); |
ba4e7d97 TH |
933 | if (ret) |
934 | goto out_unlock; | |
ba4e7d97 | 935 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait); |
ba4e7d97 TH |
936 | out_unlock: |
937 | if (ret && mem.mm_node) { | |
a987fcaa | 938 | spin_lock(&glob->lru_lock); |
ca262a99 | 939 | mem.mm_node->private = NULL; |
ba4e7d97 | 940 | drm_mm_put_block(mem.mm_node); |
a987fcaa | 941 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
942 | } |
943 | return ret; | |
944 | } | |
945 | ||
ca262a99 | 946 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
947 | struct ttm_mem_reg *mem) |
948 | { | |
ca262a99 JG |
949 | int i; |
950 | ||
951 | for (i = 0; i < placement->num_placement; i++) { | |
952 | if ((placement->placement[i] & mem->placement & | |
953 | TTM_PL_MASK_CACHING) && | |
954 | (placement->placement[i] & mem->placement & | |
955 | TTM_PL_MASK_MEM)) | |
956 | return i; | |
957 | } | |
958 | return -1; | |
ba4e7d97 TH |
959 | } |
960 | ||
961 | int ttm_buffer_object_validate(struct ttm_buffer_object *bo, | |
ca262a99 JG |
962 | struct ttm_placement *placement, |
963 | bool interruptible, bool no_wait) | |
ba4e7d97 TH |
964 | { |
965 | int ret; | |
966 | ||
967 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
968 | /* Check that range is valid */ |
969 | if (placement->lpfn || placement->fpfn) | |
970 | if (placement->fpfn > placement->lpfn || | |
971 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
972 | return -EINVAL; | |
ba4e7d97 TH |
973 | /* |
974 | * Check whether we need to move buffer. | |
975 | */ | |
ca262a99 JG |
976 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
977 | if (ret < 0) { | |
978 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait); | |
979 | if (ret) | |
ba4e7d97 | 980 | return ret; |
ca262a99 JG |
981 | } else { |
982 | /* | |
983 | * Use the access and other non-mapping-related flag bits from | |
984 | * the compatible memory placement flags to the active flags | |
985 | */ | |
986 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
987 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 988 | } |
ba4e7d97 TH |
989 | /* |
990 | * We might need to add a TTM. | |
991 | */ | |
ba4e7d97 TH |
992 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
993 | ret = ttm_bo_add_ttm(bo, true); | |
994 | if (ret) | |
995 | return ret; | |
996 | } | |
ba4e7d97 TH |
997 | return 0; |
998 | } | |
999 | EXPORT_SYMBOL(ttm_buffer_object_validate); | |
1000 | ||
1001 | int | |
1002 | ttm_bo_check_placement(struct ttm_buffer_object *bo, | |
1003 | uint32_t set_flags, uint32_t clr_flags) | |
1004 | { | |
1005 | uint32_t new_mask = set_flags | clr_flags; | |
1006 | ||
1007 | if ((bo->type == ttm_bo_type_user) && | |
1008 | (clr_flags & TTM_PL_FLAG_CACHED)) { | |
1009 | printk(KERN_ERR TTM_PFX | |
1010 | "User buffers require cache-coherent memory.\n"); | |
1011 | return -EINVAL; | |
1012 | } | |
1013 | ||
1014 | if (!capable(CAP_SYS_ADMIN)) { | |
1015 | if (new_mask & TTM_PL_FLAG_NO_EVICT) { | |
1016 | printk(KERN_ERR TTM_PFX "Need to be root to modify" | |
1017 | " NO_EVICT status.\n"); | |
1018 | return -EINVAL; | |
1019 | } | |
1020 | ||
1021 | if ((clr_flags & bo->mem.placement & TTM_PL_MASK_MEMTYPE) && | |
1022 | (bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
1023 | printk(KERN_ERR TTM_PFX | |
1024 | "Incompatible memory specification" | |
1025 | " for NO_EVICT buffer.\n"); | |
1026 | return -EINVAL; | |
1027 | } | |
1028 | } | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | int ttm_buffer_object_init(struct ttm_bo_device *bdev, | |
1033 | struct ttm_buffer_object *bo, | |
1034 | unsigned long size, | |
1035 | enum ttm_bo_type type, | |
1036 | uint32_t flags, | |
1037 | uint32_t page_alignment, | |
1038 | unsigned long buffer_start, | |
1039 | bool interruptible, | |
1040 | struct file *persistant_swap_storage, | |
1041 | size_t acc_size, | |
1042 | void (*destroy) (struct ttm_buffer_object *)) | |
1043 | { | |
ca262a99 | 1044 | int i, c, ret = 0; |
ba4e7d97 | 1045 | unsigned long num_pages; |
ca262a99 JG |
1046 | uint32_t placements[8]; |
1047 | struct ttm_placement placement; | |
ba4e7d97 TH |
1048 | |
1049 | size += buffer_start & ~PAGE_MASK; | |
1050 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1051 | if (num_pages == 0) { | |
1052 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
1053 | return -EINVAL; | |
1054 | } | |
1055 | bo->destroy = destroy; | |
1056 | ||
1057 | spin_lock_init(&bo->lock); | |
1058 | kref_init(&bo->kref); | |
1059 | kref_init(&bo->list_kref); | |
1060 | atomic_set(&bo->cpu_writers, 0); | |
1061 | atomic_set(&bo->reserved, 1); | |
1062 | init_waitqueue_head(&bo->event_queue); | |
1063 | INIT_LIST_HEAD(&bo->lru); | |
1064 | INIT_LIST_HEAD(&bo->ddestroy); | |
1065 | INIT_LIST_HEAD(&bo->swap); | |
1066 | bo->bdev = bdev; | |
a987fcaa | 1067 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1068 | bo->type = type; |
1069 | bo->num_pages = num_pages; | |
1070 | bo->mem.mem_type = TTM_PL_SYSTEM; | |
1071 | bo->mem.num_pages = bo->num_pages; | |
1072 | bo->mem.mm_node = NULL; | |
1073 | bo->mem.page_alignment = page_alignment; | |
1074 | bo->buffer_start = buffer_start & PAGE_MASK; | |
1075 | bo->priv_flags = 0; | |
1076 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1077 | bo->seq_valid = false; | |
1078 | bo->persistant_swap_storage = persistant_swap_storage; | |
1079 | bo->acc_size = acc_size; | |
a987fcaa | 1080 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 TH |
1081 | |
1082 | ret = ttm_bo_check_placement(bo, flags, 0ULL); | |
1083 | if (unlikely(ret != 0)) | |
1084 | goto out_err; | |
1085 | ||
1086 | /* | |
1087 | * If no caching attributes are set, accept any form of caching. | |
1088 | */ | |
1089 | ||
1090 | if ((flags & TTM_PL_MASK_CACHING) == 0) | |
1091 | flags |= TTM_PL_MASK_CACHING; | |
1092 | ||
1093 | /* | |
1094 | * For ttm_bo_type_device buffers, allocate | |
1095 | * address space from the device. | |
1096 | */ | |
1097 | ||
1098 | if (bo->type == ttm_bo_type_device) { | |
1099 | ret = ttm_bo_setup_vm(bo); | |
1100 | if (ret) | |
1101 | goto out_err; | |
1102 | } | |
1103 | ||
ca262a99 JG |
1104 | placement.fpfn = 0; |
1105 | placement.lpfn = 0; | |
1106 | for (i = 0, c = 0; i <= TTM_PL_PRIV5; i++) | |
1107 | if (flags & (1 << i)) | |
1108 | placements[c++] = (flags & ~TTM_PL_MASK_MEM) | (1 << i); | |
1109 | placement.placement = placements; | |
1110 | placement.num_placement = c; | |
1111 | placement.busy_placement = placements; | |
1112 | placement.num_busy_placement = c; | |
1113 | ret = ttm_buffer_object_validate(bo, &placement, interruptible, false); | |
ba4e7d97 TH |
1114 | if (ret) |
1115 | goto out_err; | |
1116 | ||
1117 | ttm_bo_unreserve(bo); | |
1118 | return 0; | |
1119 | ||
1120 | out_err: | |
1121 | ttm_bo_unreserve(bo); | |
1122 | ttm_bo_unref(&bo); | |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | EXPORT_SYMBOL(ttm_buffer_object_init); | |
1127 | ||
a987fcaa | 1128 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1129 | unsigned long num_pages) |
1130 | { | |
1131 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1132 | PAGE_MASK; | |
1133 | ||
a987fcaa | 1134 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1135 | } |
1136 | ||
1137 | int ttm_buffer_object_create(struct ttm_bo_device *bdev, | |
1138 | unsigned long size, | |
1139 | enum ttm_bo_type type, | |
1140 | uint32_t flags, | |
1141 | uint32_t page_alignment, | |
1142 | unsigned long buffer_start, | |
1143 | bool interruptible, | |
1144 | struct file *persistant_swap_storage, | |
1145 | struct ttm_buffer_object **p_bo) | |
1146 | { | |
1147 | struct ttm_buffer_object *bo; | |
a987fcaa | 1148 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1149 | int ret; |
ba4e7d97 TH |
1150 | |
1151 | size_t acc_size = | |
a987fcaa | 1152 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1153 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1154 | if (unlikely(ret != 0)) |
1155 | return ret; | |
1156 | ||
1157 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1158 | ||
1159 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1160 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1161 | return -ENOMEM; |
1162 | } | |
1163 | ||
1164 | ret = ttm_buffer_object_init(bdev, bo, size, type, flags, | |
1165 | page_alignment, buffer_start, | |
1166 | interruptible, | |
1167 | persistant_swap_storage, acc_size, NULL); | |
1168 | if (likely(ret == 0)) | |
1169 | *p_bo = bo; | |
1170 | ||
1171 | return ret; | |
1172 | } | |
1173 | ||
ba4e7d97 | 1174 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1175 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1176 | { |
ca262a99 | 1177 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1178 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1179 | int ret; |
ba4e7d97 TH |
1180 | |
1181 | /* | |
1182 | * Can't use standard list traversal since we're unlocking. | |
1183 | */ | |
1184 | ||
a987fcaa | 1185 | spin_lock(&glob->lru_lock); |
ca262a99 | 1186 | while (!list_empty(&man->lru)) { |
a987fcaa | 1187 | spin_unlock(&glob->lru_lock); |
ca262a99 JG |
1188 | ret = ttm_mem_evict_first(bdev, mem_type, false, false); |
1189 | if (ret) { | |
1190 | if (allow_errors) { | |
1191 | return ret; | |
1192 | } else { | |
1193 | printk(KERN_ERR TTM_PFX | |
1194 | "Cleanup eviction failed\n"); | |
1195 | } | |
1196 | } | |
a987fcaa | 1197 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1198 | } |
a987fcaa | 1199 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1200 | return 0; |
1201 | } | |
1202 | ||
1203 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1204 | { | |
a987fcaa | 1205 | struct ttm_bo_global *glob = bdev->glob; |
c96e7c7a | 1206 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1207 | int ret = -EINVAL; |
1208 | ||
1209 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1210 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1211 | return ret; | |
1212 | } | |
c96e7c7a | 1213 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1214 | |
1215 | if (!man->has_type) { | |
1216 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1217 | "memory manager type %u\n", mem_type); | |
1218 | return ret; | |
1219 | } | |
1220 | ||
1221 | man->use_type = false; | |
1222 | man->has_type = false; | |
1223 | ||
1224 | ret = 0; | |
1225 | if (mem_type > 0) { | |
ca262a99 | 1226 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1227 | |
a987fcaa | 1228 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1229 | if (drm_mm_clean(&man->manager)) |
1230 | drm_mm_takedown(&man->manager); | |
1231 | else | |
1232 | ret = -EBUSY; | |
1233 | ||
a987fcaa | 1234 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1235 | } |
1236 | ||
1237 | return ret; | |
1238 | } | |
1239 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1240 | ||
1241 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1242 | { | |
1243 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1244 | ||
1245 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1246 | printk(KERN_ERR TTM_PFX | |
1247 | "Illegal memory manager memory type %u.\n", | |
1248 | mem_type); | |
1249 | return -EINVAL; | |
1250 | } | |
1251 | ||
1252 | if (!man->has_type) { | |
1253 | printk(KERN_ERR TTM_PFX | |
1254 | "Memory type %u has not been initialized.\n", | |
1255 | mem_type); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
ca262a99 | 1259 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1260 | } |
1261 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1262 | ||
1263 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1264 | unsigned long p_size) |
ba4e7d97 TH |
1265 | { |
1266 | int ret = -EINVAL; | |
1267 | struct ttm_mem_type_manager *man; | |
1268 | ||
1269 | if (type >= TTM_NUM_MEM_TYPES) { | |
1270 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); | |
1271 | return ret; | |
1272 | } | |
1273 | ||
1274 | man = &bdev->man[type]; | |
1275 | if (man->has_type) { | |
1276 | printk(KERN_ERR TTM_PFX | |
1277 | "Memory manager already initialized for type %d\n", | |
1278 | type); | |
1279 | return ret; | |
1280 | } | |
1281 | ||
1282 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1283 | if (ret) | |
1284 | return ret; | |
1285 | ||
1286 | ret = 0; | |
1287 | if (type != TTM_PL_SYSTEM) { | |
1288 | if (!p_size) { | |
1289 | printk(KERN_ERR TTM_PFX | |
1290 | "Zero size memory manager type %d\n", | |
1291 | type); | |
1292 | return ret; | |
1293 | } | |
ca262a99 | 1294 | ret = drm_mm_init(&man->manager, 0, p_size); |
ba4e7d97 TH |
1295 | if (ret) |
1296 | return ret; | |
1297 | } | |
1298 | man->has_type = true; | |
1299 | man->use_type = true; | |
1300 | man->size = p_size; | |
1301 | ||
1302 | INIT_LIST_HEAD(&man->lru); | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1307 | ||
a987fcaa TH |
1308 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1309 | { | |
1310 | struct ttm_bo_global *glob = | |
1311 | container_of(kobj, struct ttm_bo_global, kobj); | |
1312 | ||
a987fcaa TH |
1313 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1314 | __free_page(glob->dummy_read_page); | |
1315 | kfree(glob); | |
1316 | } | |
1317 | ||
1318 | void ttm_bo_global_release(struct ttm_global_reference *ref) | |
1319 | { | |
1320 | struct ttm_bo_global *glob = ref->object; | |
1321 | ||
1322 | kobject_del(&glob->kobj); | |
1323 | kobject_put(&glob->kobj); | |
1324 | } | |
1325 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1326 | ||
1327 | int ttm_bo_global_init(struct ttm_global_reference *ref) | |
1328 | { | |
1329 | struct ttm_bo_global_ref *bo_ref = | |
1330 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1331 | struct ttm_bo_global *glob = ref->object; | |
1332 | int ret; | |
1333 | ||
1334 | mutex_init(&glob->device_list_mutex); | |
1335 | spin_lock_init(&glob->lru_lock); | |
1336 | glob->mem_glob = bo_ref->mem_glob; | |
1337 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1338 | ||
1339 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1340 | ret = -ENOMEM; | |
1341 | goto out_no_drp; | |
1342 | } | |
1343 | ||
1344 | INIT_LIST_HEAD(&glob->swap_lru); | |
1345 | INIT_LIST_HEAD(&glob->device_list); | |
1346 | ||
1347 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1348 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1349 | if (unlikely(ret != 0)) { | |
1350 | printk(KERN_ERR TTM_PFX | |
1351 | "Could not register buffer object swapout.\n"); | |
1352 | goto out_no_shrink; | |
1353 | } | |
1354 | ||
1355 | glob->ttm_bo_extra_size = | |
1356 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1357 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1358 | ||
1359 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1360 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1361 | ||
1362 | atomic_set(&glob->bo_count, 0); | |
1363 | ||
1364 | kobject_init(&glob->kobj, &ttm_bo_glob_kobj_type); | |
1365 | ret = kobject_add(&glob->kobj, ttm_get_kobj(), "buffer_objects"); | |
1366 | if (unlikely(ret != 0)) | |
1367 | kobject_put(&glob->kobj); | |
1368 | return ret; | |
1369 | out_no_shrink: | |
1370 | __free_page(glob->dummy_read_page); | |
1371 | out_no_drp: | |
1372 | kfree(glob); | |
1373 | return ret; | |
1374 | } | |
1375 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1376 | ||
1377 | ||
ba4e7d97 TH |
1378 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1379 | { | |
1380 | int ret = 0; | |
1381 | unsigned i = TTM_NUM_MEM_TYPES; | |
1382 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1383 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1384 | |
1385 | while (i--) { | |
1386 | man = &bdev->man[i]; | |
1387 | if (man->has_type) { | |
1388 | man->use_type = false; | |
1389 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1390 | ret = -EBUSY; | |
1391 | printk(KERN_ERR TTM_PFX | |
1392 | "DRM memory manager type %d " | |
1393 | "is not clean.\n", i); | |
1394 | } | |
1395 | man->has_type = false; | |
1396 | } | |
1397 | } | |
1398 | ||
a987fcaa TH |
1399 | mutex_lock(&glob->device_list_mutex); |
1400 | list_del(&bdev->device_list); | |
1401 | mutex_unlock(&glob->device_list_mutex); | |
1402 | ||
ba4e7d97 TH |
1403 | if (!cancel_delayed_work(&bdev->wq)) |
1404 | flush_scheduled_work(); | |
1405 | ||
1406 | while (ttm_bo_delayed_delete(bdev, true)) | |
1407 | ; | |
1408 | ||
a987fcaa | 1409 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1410 | if (list_empty(&bdev->ddestroy)) |
1411 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1412 | ||
1413 | if (list_empty(&bdev->man[0].lru)) | |
1414 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1415 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1416 | |
ba4e7d97 TH |
1417 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1418 | write_lock(&bdev->vm_lock); | |
1419 | drm_mm_takedown(&bdev->addr_space_mm); | |
1420 | write_unlock(&bdev->vm_lock); | |
1421 | ||
ba4e7d97 TH |
1422 | return ret; |
1423 | } | |
1424 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1425 | ||
ba4e7d97 | 1426 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1427 | struct ttm_bo_global *glob, |
1428 | struct ttm_bo_driver *driver, | |
51c8b407 | 1429 | uint64_t file_page_offset, |
ad49f501 | 1430 | bool need_dma32) |
ba4e7d97 TH |
1431 | { |
1432 | int ret = -EINVAL; | |
1433 | ||
ba4e7d97 | 1434 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1435 | bdev->driver = driver; |
ba4e7d97 TH |
1436 | |
1437 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1438 | ||
ba4e7d97 TH |
1439 | /* |
1440 | * Initialize the system memory buffer type. | |
1441 | * Other types need to be driver / IOCTL initialized. | |
1442 | */ | |
ca262a99 | 1443 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1444 | if (unlikely(ret != 0)) |
a987fcaa | 1445 | goto out_no_sys; |
ba4e7d97 TH |
1446 | |
1447 | bdev->addr_space_rb = RB_ROOT; | |
1448 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1449 | if (unlikely(ret != 0)) | |
a987fcaa | 1450 | goto out_no_addr_mm; |
ba4e7d97 TH |
1451 | |
1452 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1453 | bdev->nice_mode = true; | |
1454 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1455 | bdev->dev_mapping = NULL; |
a987fcaa | 1456 | bdev->glob = glob; |
ad49f501 | 1457 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1458 | |
a987fcaa TH |
1459 | mutex_lock(&glob->device_list_mutex); |
1460 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1461 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1462 | |
1463 | return 0; | |
a987fcaa | 1464 | out_no_addr_mm: |
ba4e7d97 | 1465 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1466 | out_no_sys: |
ba4e7d97 TH |
1467 | return ret; |
1468 | } | |
1469 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1470 | ||
1471 | /* | |
1472 | * buffer object vm functions. | |
1473 | */ | |
1474 | ||
1475 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1476 | { | |
1477 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1478 | ||
1479 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1480 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1481 | return false; | |
1482 | ||
1483 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1484 | return false; | |
1485 | ||
1486 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1487 | return false; | |
1488 | } | |
1489 | return true; | |
1490 | } | |
1491 | ||
1492 | int ttm_bo_pci_offset(struct ttm_bo_device *bdev, | |
1493 | struct ttm_mem_reg *mem, | |
1494 | unsigned long *bus_base, | |
1495 | unsigned long *bus_offset, unsigned long *bus_size) | |
1496 | { | |
1497 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1498 | ||
1499 | *bus_size = 0; | |
1500 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
1501 | return -EINVAL; | |
1502 | ||
1503 | if (ttm_mem_reg_is_pci(bdev, mem)) { | |
1504 | *bus_offset = mem->mm_node->start << PAGE_SHIFT; | |
1505 | *bus_size = mem->num_pages << PAGE_SHIFT; | |
1506 | *bus_base = man->io_offset; | |
1507 | } | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1513 | { | |
1514 | struct ttm_bo_device *bdev = bo->bdev; | |
1515 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1516 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1517 | ||
1518 | if (!bdev->dev_mapping) | |
1519 | return; | |
1520 | ||
1521 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); | |
1522 | } | |
e024e110 | 1523 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1524 | |
1525 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1526 | { | |
1527 | struct ttm_bo_device *bdev = bo->bdev; | |
1528 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1529 | struct rb_node *parent = NULL; | |
1530 | struct ttm_buffer_object *cur_bo; | |
1531 | unsigned long offset = bo->vm_node->start; | |
1532 | unsigned long cur_offset; | |
1533 | ||
1534 | while (*cur) { | |
1535 | parent = *cur; | |
1536 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1537 | cur_offset = cur_bo->vm_node->start; | |
1538 | if (offset < cur_offset) | |
1539 | cur = &parent->rb_left; | |
1540 | else if (offset > cur_offset) | |
1541 | cur = &parent->rb_right; | |
1542 | else | |
1543 | BUG(); | |
1544 | } | |
1545 | ||
1546 | rb_link_node(&bo->vm_rb, parent, cur); | |
1547 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1548 | } | |
1549 | ||
1550 | /** | |
1551 | * ttm_bo_setup_vm: | |
1552 | * | |
1553 | * @bo: the buffer to allocate address space for | |
1554 | * | |
1555 | * Allocate address space in the drm device so that applications | |
1556 | * can mmap the buffer and access the contents. This only | |
1557 | * applies to ttm_bo_type_device objects as others are not | |
1558 | * placed in the drm device address space. | |
1559 | */ | |
1560 | ||
1561 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1562 | { | |
1563 | struct ttm_bo_device *bdev = bo->bdev; | |
1564 | int ret; | |
1565 | ||
1566 | retry_pre_get: | |
1567 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1568 | if (unlikely(ret != 0)) | |
1569 | return ret; | |
1570 | ||
1571 | write_lock(&bdev->vm_lock); | |
1572 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1573 | bo->mem.num_pages, 0, 0); | |
1574 | ||
1575 | if (unlikely(bo->vm_node == NULL)) { | |
1576 | ret = -ENOMEM; | |
1577 | goto out_unlock; | |
1578 | } | |
1579 | ||
1580 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1581 | bo->mem.num_pages, 0); | |
1582 | ||
1583 | if (unlikely(bo->vm_node == NULL)) { | |
1584 | write_unlock(&bdev->vm_lock); | |
1585 | goto retry_pre_get; | |
1586 | } | |
1587 | ||
1588 | ttm_bo_vm_insert_rb(bo); | |
1589 | write_unlock(&bdev->vm_lock); | |
1590 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1591 | ||
1592 | return 0; | |
1593 | out_unlock: | |
1594 | write_unlock(&bdev->vm_lock); | |
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1599 | bool lazy, bool interruptible, bool no_wait) | |
1600 | { | |
1601 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1602 | void *sync_obj; | |
1603 | void *sync_obj_arg; | |
1604 | int ret = 0; | |
1605 | ||
1606 | if (likely(bo->sync_obj == NULL)) | |
1607 | return 0; | |
1608 | ||
1609 | while (bo->sync_obj) { | |
1610 | ||
1611 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1612 | void *tmp_obj = bo->sync_obj; | |
1613 | bo->sync_obj = NULL; | |
1614 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1615 | spin_unlock(&bo->lock); | |
1616 | driver->sync_obj_unref(&tmp_obj); | |
1617 | spin_lock(&bo->lock); | |
1618 | continue; | |
1619 | } | |
1620 | ||
1621 | if (no_wait) | |
1622 | return -EBUSY; | |
1623 | ||
1624 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1625 | sync_obj_arg = bo->sync_obj_arg; | |
1626 | spin_unlock(&bo->lock); | |
1627 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1628 | lazy, interruptible); | |
1629 | if (unlikely(ret != 0)) { | |
1630 | driver->sync_obj_unref(&sync_obj); | |
1631 | spin_lock(&bo->lock); | |
1632 | return ret; | |
1633 | } | |
1634 | spin_lock(&bo->lock); | |
1635 | if (likely(bo->sync_obj == sync_obj && | |
1636 | bo->sync_obj_arg == sync_obj_arg)) { | |
1637 | void *tmp_obj = bo->sync_obj; | |
1638 | bo->sync_obj = NULL; | |
1639 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1640 | &bo->priv_flags); | |
1641 | spin_unlock(&bo->lock); | |
1642 | driver->sync_obj_unref(&sync_obj); | |
1643 | driver->sync_obj_unref(&tmp_obj); | |
1644 | spin_lock(&bo->lock); | |
fee280d3 TH |
1645 | } else { |
1646 | spin_unlock(&bo->lock); | |
1647 | driver->sync_obj_unref(&sync_obj); | |
1648 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1649 | } |
1650 | } | |
1651 | return 0; | |
1652 | } | |
1653 | EXPORT_SYMBOL(ttm_bo_wait); | |
1654 | ||
1655 | void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo) | |
1656 | { | |
1657 | atomic_set(&bo->reserved, 0); | |
1658 | wake_up_all(&bo->event_queue); | |
1659 | } | |
1660 | ||
1661 | int ttm_bo_block_reservation(struct ttm_buffer_object *bo, bool interruptible, | |
1662 | bool no_wait) | |
1663 | { | |
1664 | int ret; | |
1665 | ||
1666 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
1667 | if (no_wait) | |
1668 | return -EBUSY; | |
1669 | else if (interruptible) { | |
1670 | ret = wait_event_interruptible | |
1671 | (bo->event_queue, atomic_read(&bo->reserved) == 0); | |
1672 | if (unlikely(ret != 0)) | |
98ffc415 | 1673 | return ret; |
ba4e7d97 TH |
1674 | } else { |
1675 | wait_event(bo->event_queue, | |
1676 | atomic_read(&bo->reserved) == 0); | |
1677 | } | |
1678 | } | |
1679 | return 0; | |
1680 | } | |
1681 | ||
1682 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) | |
1683 | { | |
1684 | int ret = 0; | |
1685 | ||
1686 | /* | |
1687 | * Using ttm_bo_reserve instead of ttm_bo_block_reservation | |
1688 | * makes sure the lru lists are updated. | |
1689 | */ | |
1690 | ||
1691 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1692 | if (unlikely(ret != 0)) | |
1693 | return ret; | |
1694 | spin_lock(&bo->lock); | |
1695 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1696 | spin_unlock(&bo->lock); | |
1697 | if (likely(ret == 0)) | |
1698 | atomic_inc(&bo->cpu_writers); | |
1699 | ttm_bo_unreserve(bo); | |
1700 | return ret; | |
1701 | } | |
1702 | ||
1703 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1704 | { | |
1705 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1706 | wake_up_all(&bo->event_queue); | |
1707 | } | |
1708 | ||
1709 | /** | |
1710 | * A buffer object shrink method that tries to swap out the first | |
1711 | * buffer object on the bo_global::swap_lru list. | |
1712 | */ | |
1713 | ||
1714 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1715 | { | |
a987fcaa TH |
1716 | struct ttm_bo_global *glob = |
1717 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1718 | struct ttm_buffer_object *bo; |
1719 | int ret = -EBUSY; | |
1720 | int put_count; | |
1721 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1722 | ||
a987fcaa | 1723 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1724 | while (ret == -EBUSY) { |
a987fcaa TH |
1725 | if (unlikely(list_empty(&glob->swap_lru))) { |
1726 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1727 | return -EBUSY; |
1728 | } | |
1729 | ||
a987fcaa | 1730 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1731 | struct ttm_buffer_object, swap); |
1732 | kref_get(&bo->list_kref); | |
1733 | ||
1734 | /** | |
1735 | * Reserve buffer. Since we unlock while sleeping, we need | |
1736 | * to re-check that nobody removed us from the swap-list while | |
1737 | * we slept. | |
1738 | */ | |
1739 | ||
1740 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1741 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1742 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1743 | ttm_bo_wait_unreserved(bo, false); |
1744 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1745 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1746 | } |
1747 | } | |
1748 | ||
1749 | BUG_ON(ret != 0); | |
1750 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1751 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1752 | |
1753 | while (put_count--) | |
1754 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
1755 | ||
1756 | /** | |
1757 | * Wait for GPU, then move to system cached. | |
1758 | */ | |
1759 | ||
1760 | spin_lock(&bo->lock); | |
1761 | ret = ttm_bo_wait(bo, false, false, false); | |
1762 | spin_unlock(&bo->lock); | |
1763 | ||
1764 | if (unlikely(ret != 0)) | |
1765 | goto out; | |
1766 | ||
1767 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1768 | struct ttm_mem_reg evict_mem; | |
1769 | ||
1770 | evict_mem = bo->mem; | |
1771 | evict_mem.mm_node = NULL; | |
1772 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1773 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1774 | ||
1775 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
1776 | false, false); | |
1777 | if (unlikely(ret != 0)) | |
1778 | goto out; | |
1779 | } | |
1780 | ||
1781 | ttm_bo_unmap_virtual(bo); | |
1782 | ||
1783 | /** | |
1784 | * Swap out. Buffer will be swapped in again as soon as | |
1785 | * anyone tries to access a ttm page. | |
1786 | */ | |
1787 | ||
1788 | ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage); | |
1789 | out: | |
1790 | ||
1791 | /** | |
1792 | * | |
1793 | * Unreserve without putting on LRU to avoid swapping out an | |
1794 | * already swapped buffer. | |
1795 | */ | |
1796 | ||
1797 | atomic_set(&bo->reserved, 0); | |
1798 | wake_up_all(&bo->event_queue); | |
1799 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1800 | return ret; | |
1801 | } | |
1802 | ||
1803 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1804 | { | |
a987fcaa | 1805 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1806 | ; |
1807 | } |