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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 | ||
fb53f862 JG |
62 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
63 | { | |
64 | int i; | |
65 | ||
66 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
67 | if (flags & (1 << i)) { | |
68 | *mem_type = i; | |
69 | return 0; | |
70 | } | |
71 | return -EINVAL; | |
72 | } | |
73 | ||
5012f506 | 74 | static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
fb53f862 | 75 | { |
5012f506 JG |
76 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
77 | ||
fb53f862 JG |
78 | printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type); |
79 | printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type); | |
80 | printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags); | |
81 | printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset); | |
82 | printk(KERN_ERR TTM_PFX " io_offset: 0x%08lX\n", man->io_offset); | |
83 | printk(KERN_ERR TTM_PFX " io_size: %ld\n", man->io_size); | |
eb6d2c39 | 84 | printk(KERN_ERR TTM_PFX " size: %llu\n", man->size); |
fb53f862 JG |
85 | printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n", |
86 | man->available_caching); | |
87 | printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n", | |
88 | man->default_caching); | |
5012f506 JG |
89 | if (mem_type != TTM_PL_SYSTEM) { |
90 | spin_lock(&bdev->glob->lru_lock); | |
91 | drm_mm_debug_table(&man->manager, TTM_PFX); | |
92 | spin_unlock(&bdev->glob->lru_lock); | |
93 | } | |
fb53f862 JG |
94 | } |
95 | ||
96 | static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, | |
97 | struct ttm_placement *placement) | |
98 | { | |
fb53f862 JG |
99 | int i, ret, mem_type; |
100 | ||
eb6d2c39 | 101 | printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n", |
fb53f862 JG |
102 | bo, bo->mem.num_pages, bo->mem.size >> 10, |
103 | bo->mem.size >> 20); | |
104 | for (i = 0; i < placement->num_placement; i++) { | |
105 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
106 | &mem_type); | |
107 | if (ret) | |
108 | return; | |
fb53f862 JG |
109 | printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n", |
110 | i, placement->placement[i], mem_type); | |
5012f506 | 111 | ttm_mem_type_debug(bo->bdev, mem_type); |
fb53f862 JG |
112 | } |
113 | } | |
114 | ||
a987fcaa TH |
115 | static ssize_t ttm_bo_global_show(struct kobject *kobj, |
116 | struct attribute *attr, | |
117 | char *buffer) | |
118 | { | |
119 | struct ttm_bo_global *glob = | |
120 | container_of(kobj, struct ttm_bo_global, kobj); | |
121 | ||
122 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
123 | (unsigned long) atomic_read(&glob->bo_count)); | |
124 | } | |
125 | ||
126 | static struct attribute *ttm_bo_global_attrs[] = { | |
127 | &ttm_bo_count, | |
128 | NULL | |
129 | }; | |
130 | ||
52cf25d0 | 131 | static const struct sysfs_ops ttm_bo_global_ops = { |
a987fcaa TH |
132 | .show = &ttm_bo_global_show |
133 | }; | |
134 | ||
135 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
136 | .release = &ttm_bo_global_kobj_release, | |
137 | .sysfs_ops = &ttm_bo_global_ops, | |
138 | .default_attrs = ttm_bo_global_attrs | |
139 | }; | |
140 | ||
ba4e7d97 TH |
141 | |
142 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
143 | { | |
144 | return 1 << (type); | |
145 | } | |
146 | ||
147 | static void ttm_bo_release_list(struct kref *list_kref) | |
148 | { | |
149 | struct ttm_buffer_object *bo = | |
150 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
151 | struct ttm_bo_device *bdev = bo->bdev; | |
152 | ||
153 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
154 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
155 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
156 | BUG_ON(bo->sync_obj != NULL); | |
157 | BUG_ON(bo->mem.mm_node != NULL); | |
158 | BUG_ON(!list_empty(&bo->lru)); | |
159 | BUG_ON(!list_empty(&bo->ddestroy)); | |
160 | ||
161 | if (bo->ttm) | |
162 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 163 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
164 | if (bo->destroy) |
165 | bo->destroy(bo); | |
166 | else { | |
a987fcaa | 167 | ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size); |
ba4e7d97 TH |
168 | kfree(bo); |
169 | } | |
170 | } | |
171 | ||
172 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
173 | { | |
174 | ||
175 | if (interruptible) { | |
176 | int ret = 0; | |
177 | ||
178 | ret = wait_event_interruptible(bo->event_queue, | |
179 | atomic_read(&bo->reserved) == 0); | |
180 | if (unlikely(ret != 0)) | |
98ffc415 | 181 | return ret; |
ba4e7d97 TH |
182 | } else { |
183 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
184 | } | |
185 | return 0; | |
186 | } | |
d1ede145 | 187 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 TH |
188 | |
189 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
190 | { | |
191 | struct ttm_bo_device *bdev = bo->bdev; | |
192 | struct ttm_mem_type_manager *man; | |
193 | ||
194 | BUG_ON(!atomic_read(&bo->reserved)); | |
195 | ||
196 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
197 | ||
198 | BUG_ON(!list_empty(&bo->lru)); | |
199 | ||
200 | man = &bdev->man[bo->mem.mem_type]; | |
201 | list_add_tail(&bo->lru, &man->lru); | |
202 | kref_get(&bo->list_kref); | |
203 | ||
204 | if (bo->ttm != NULL) { | |
a987fcaa | 205 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
206 | kref_get(&bo->list_kref); |
207 | } | |
208 | } | |
209 | } | |
210 | ||
211 | /** | |
212 | * Call with the lru_lock held. | |
213 | */ | |
214 | ||
215 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
216 | { | |
217 | int put_count = 0; | |
218 | ||
219 | if (!list_empty(&bo->swap)) { | |
220 | list_del_init(&bo->swap); | |
221 | ++put_count; | |
222 | } | |
223 | if (!list_empty(&bo->lru)) { | |
224 | list_del_init(&bo->lru); | |
225 | ++put_count; | |
226 | } | |
227 | ||
228 | /* | |
229 | * TODO: Add a driver hook to delete from | |
230 | * driver-specific LRU's here. | |
231 | */ | |
232 | ||
233 | return put_count; | |
234 | } | |
235 | ||
236 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
237 | bool interruptible, | |
238 | bool no_wait, bool use_sequence, uint32_t sequence) | |
239 | { | |
a987fcaa | 240 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
241 | int ret; |
242 | ||
243 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
244 | if (use_sequence && bo->seq_valid && | |
245 | (sequence - bo->val_seq < (1 << 31))) { | |
246 | return -EAGAIN; | |
247 | } | |
248 | ||
249 | if (no_wait) | |
250 | return -EBUSY; | |
251 | ||
a987fcaa | 252 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 253 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 254 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
255 | |
256 | if (unlikely(ret)) | |
257 | return ret; | |
258 | } | |
259 | ||
260 | if (use_sequence) { | |
261 | bo->val_seq = sequence; | |
262 | bo->seq_valid = true; | |
263 | } else { | |
264 | bo->seq_valid = false; | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | EXPORT_SYMBOL(ttm_bo_reserve); | |
270 | ||
271 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
272 | { | |
273 | BUG(); | |
274 | } | |
275 | ||
276 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
277 | bool interruptible, | |
278 | bool no_wait, bool use_sequence, uint32_t sequence) | |
279 | { | |
a987fcaa | 280 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
281 | int put_count = 0; |
282 | int ret; | |
283 | ||
a987fcaa | 284 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
285 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
286 | sequence); | |
287 | if (likely(ret == 0)) | |
288 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 289 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
290 | |
291 | while (put_count--) | |
292 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
297 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
298 | { | |
a987fcaa | 299 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 300 | |
a987fcaa | 301 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
302 | ttm_bo_add_to_lru(bo); |
303 | atomic_set(&bo->reserved, 0); | |
304 | wake_up_all(&bo->event_queue); | |
a987fcaa | 305 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
306 | } |
307 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
308 | ||
309 | /* | |
310 | * Call bo->mutex locked. | |
311 | */ | |
ba4e7d97 TH |
312 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
313 | { | |
314 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 315 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
316 | int ret = 0; |
317 | uint32_t page_flags = 0; | |
318 | ||
319 | TTM_ASSERT_LOCKED(&bo->mutex); | |
320 | bo->ttm = NULL; | |
321 | ||
ad49f501 DA |
322 | if (bdev->need_dma32) |
323 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
324 | ||
ba4e7d97 TH |
325 | switch (bo->type) { |
326 | case ttm_bo_type_device: | |
327 | if (zero_alloc) | |
328 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
329 | case ttm_bo_type_kernel: | |
330 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 331 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
332 | if (unlikely(bo->ttm == NULL)) |
333 | ret = -ENOMEM; | |
334 | break; | |
335 | case ttm_bo_type_user: | |
336 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
337 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 338 | glob->dummy_read_page); |
447aeb90 | 339 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 340 | ret = -ENOMEM; |
447aeb90 DA |
341 | break; |
342 | } | |
ba4e7d97 TH |
343 | |
344 | ret = ttm_tt_set_user(bo->ttm, current, | |
345 | bo->buffer_start, bo->num_pages); | |
346 | if (unlikely(ret != 0)) | |
347 | ttm_tt_destroy(bo->ttm); | |
348 | break; | |
349 | default: | |
350 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
351 | ret = -EINVAL; | |
352 | break; | |
353 | } | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
358 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
359 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
360 | bool evict, bool interruptible, |
361 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
362 | { |
363 | struct ttm_bo_device *bdev = bo->bdev; | |
364 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
365 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
366 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
367 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
368 | int ret = 0; | |
369 | ||
370 | if (old_is_pci || new_is_pci || | |
371 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
372 | ttm_bo_unmap_virtual(bo); | |
373 | ||
374 | /* | |
375 | * Create and bind a ttm if required. | |
376 | */ | |
377 | ||
378 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
379 | ret = ttm_bo_add_ttm(bo, false); | |
380 | if (ret) | |
381 | goto out_err; | |
382 | ||
383 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
384 | if (ret) | |
87ef9209 | 385 | goto out_err; |
ba4e7d97 TH |
386 | |
387 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
388 | ret = ttm_tt_bind(bo->ttm, mem); | |
389 | if (ret) | |
390 | goto out_err; | |
391 | } | |
392 | ||
393 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 394 | bo->mem = *mem; |
ba4e7d97 | 395 | mem->mm_node = NULL; |
ba4e7d97 TH |
396 | goto moved; |
397 | } | |
398 | ||
399 | } | |
400 | ||
e024e110 DA |
401 | if (bdev->driver->move_notify) |
402 | bdev->driver->move_notify(bo, mem); | |
403 | ||
ba4e7d97 TH |
404 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
405 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 406 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
407 | else if (bdev->driver->move) |
408 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 409 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 410 | else |
9d87fa21 | 411 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
412 | |
413 | if (ret) | |
414 | goto out_err; | |
415 | ||
416 | moved: | |
417 | if (bo->evicted) { | |
418 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
419 | if (ret) | |
420 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
421 | bo->evicted = false; | |
422 | } | |
423 | ||
424 | if (bo->mem.mm_node) { | |
425 | spin_lock(&bo->lock); | |
426 | bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) + | |
427 | bdev->man[bo->mem.mem_type].gpu_offset; | |
428 | bo->cur_placement = bo->mem.placement; | |
429 | spin_unlock(&bo->lock); | |
354fb52c TH |
430 | } else |
431 | bo->offset = 0; | |
ba4e7d97 TH |
432 | |
433 | return 0; | |
434 | ||
435 | out_err: | |
436 | new_man = &bdev->man[bo->mem.mem_type]; | |
437 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
438 | ttm_tt_unbind(bo->ttm); | |
439 | ttm_tt_destroy(bo->ttm); | |
440 | bo->ttm = NULL; | |
441 | } | |
442 | ||
443 | return ret; | |
444 | } | |
445 | ||
446 | /** | |
447 | * If bo idle, remove from delayed- and lru lists, and unref. | |
448 | * If not idle, and already on delayed list, do nothing. | |
449 | * If not idle, and not on delayed list, put on delayed list, | |
450 | * up the list_kref and schedule a delayed list check. | |
451 | */ | |
452 | ||
453 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all) | |
454 | { | |
455 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 456 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
457 | struct ttm_bo_driver *driver = bdev->driver; |
458 | int ret; | |
459 | ||
460 | spin_lock(&bo->lock); | |
461 | (void) ttm_bo_wait(bo, false, false, !remove_all); | |
462 | ||
463 | if (!bo->sync_obj) { | |
464 | int put_count; | |
465 | ||
466 | spin_unlock(&bo->lock); | |
467 | ||
a987fcaa | 468 | spin_lock(&glob->lru_lock); |
aaa20736 TH |
469 | put_count = ttm_bo_del_from_lru(bo); |
470 | ||
ba4e7d97 TH |
471 | ret = ttm_bo_reserve_locked(bo, false, false, false, 0); |
472 | BUG_ON(ret); | |
473 | if (bo->ttm) | |
474 | ttm_tt_unbind(bo->ttm); | |
475 | ||
476 | if (!list_empty(&bo->ddestroy)) { | |
477 | list_del_init(&bo->ddestroy); | |
aaa20736 | 478 | ++put_count; |
ba4e7d97 TH |
479 | } |
480 | if (bo->mem.mm_node) { | |
ca262a99 | 481 | bo->mem.mm_node->private = NULL; |
ba4e7d97 TH |
482 | drm_mm_put_block(bo->mem.mm_node); |
483 | bo->mem.mm_node = NULL; | |
484 | } | |
a987fcaa | 485 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
486 | |
487 | atomic_set(&bo->reserved, 0); | |
488 | ||
489 | while (put_count--) | |
aaa20736 | 490 | kref_put(&bo->list_kref, ttm_bo_ref_bug); |
ba4e7d97 TH |
491 | |
492 | return 0; | |
493 | } | |
494 | ||
a987fcaa | 495 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
496 | if (list_empty(&bo->ddestroy)) { |
497 | void *sync_obj = bo->sync_obj; | |
498 | void *sync_obj_arg = bo->sync_obj_arg; | |
499 | ||
500 | kref_get(&bo->list_kref); | |
501 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
a987fcaa | 502 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
503 | spin_unlock(&bo->lock); |
504 | ||
505 | if (sync_obj) | |
506 | driver->sync_obj_flush(sync_obj, sync_obj_arg); | |
507 | schedule_delayed_work(&bdev->wq, | |
508 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
509 | ret = 0; | |
510 | ||
511 | } else { | |
a987fcaa | 512 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
513 | spin_unlock(&bo->lock); |
514 | ret = -EBUSY; | |
515 | } | |
516 | ||
517 | return ret; | |
518 | } | |
519 | ||
520 | /** | |
521 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
522 | * encountered buffers. | |
523 | */ | |
524 | ||
525 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
526 | { | |
a987fcaa | 527 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
528 | struct ttm_buffer_object *entry = NULL; |
529 | int ret = 0; | |
ba4e7d97 | 530 | |
a987fcaa | 531 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
532 | if (list_empty(&bdev->ddestroy)) |
533 | goto out_unlock; | |
534 | ||
535 | entry = list_first_entry(&bdev->ddestroy, | |
536 | struct ttm_buffer_object, ddestroy); | |
537 | kref_get(&entry->list_kref); | |
538 | ||
539 | for (;;) { | |
540 | struct ttm_buffer_object *nentry = NULL; | |
541 | ||
542 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
543 | nentry = list_first_entry(&entry->ddestroy, | |
544 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
545 | kref_get(&nentry->list_kref); |
546 | } | |
ba4e7d97 | 547 | |
a987fcaa | 548 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
549 | ret = ttm_bo_cleanup_refs(entry, remove_all); |
550 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
1a961ce0 LB |
551 | entry = nentry; |
552 | ||
553 | if (ret || !entry) | |
554 | goto out; | |
ba4e7d97 | 555 | |
a987fcaa | 556 | spin_lock(&glob->lru_lock); |
1a961ce0 | 557 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
558 | break; |
559 | } | |
ba4e7d97 | 560 | |
1a961ce0 LB |
561 | out_unlock: |
562 | spin_unlock(&glob->lru_lock); | |
563 | out: | |
564 | if (entry) | |
565 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
566 | return ret; |
567 | } | |
568 | ||
569 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
570 | { | |
571 | struct ttm_bo_device *bdev = | |
572 | container_of(work, struct ttm_bo_device, wq.work); | |
573 | ||
574 | if (ttm_bo_delayed_delete(bdev, false)) { | |
575 | schedule_delayed_work(&bdev->wq, | |
576 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
577 | } | |
578 | } | |
579 | ||
580 | static void ttm_bo_release(struct kref *kref) | |
581 | { | |
582 | struct ttm_buffer_object *bo = | |
583 | container_of(kref, struct ttm_buffer_object, kref); | |
584 | struct ttm_bo_device *bdev = bo->bdev; | |
585 | ||
586 | if (likely(bo->vm_node != NULL)) { | |
587 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
588 | drm_mm_put_block(bo->vm_node); | |
589 | bo->vm_node = NULL; | |
590 | } | |
591 | write_unlock(&bdev->vm_lock); | |
592 | ttm_bo_cleanup_refs(bo, false); | |
593 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
594 | write_lock(&bdev->vm_lock); | |
595 | } | |
596 | ||
597 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
598 | { | |
599 | struct ttm_buffer_object *bo = *p_bo; | |
600 | struct ttm_bo_device *bdev = bo->bdev; | |
601 | ||
602 | *p_bo = NULL; | |
603 | write_lock(&bdev->vm_lock); | |
604 | kref_put(&bo->kref, ttm_bo_release); | |
605 | write_unlock(&bdev->vm_lock); | |
606 | } | |
607 | EXPORT_SYMBOL(ttm_bo_unref); | |
608 | ||
ca262a99 | 609 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 610 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 611 | { |
ba4e7d97 | 612 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 613 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 614 | struct ttm_mem_reg evict_mem; |
ca262a99 JG |
615 | struct ttm_placement placement; |
616 | int ret = 0; | |
ba4e7d97 TH |
617 | |
618 | spin_lock(&bo->lock); | |
9d87fa21 | 619 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 TH |
620 | spin_unlock(&bo->lock); |
621 | ||
78ecf091 | 622 | if (unlikely(ret != 0)) { |
98ffc415 | 623 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
624 | printk(KERN_ERR TTM_PFX |
625 | "Failed to expire sync object before " | |
626 | "buffer eviction.\n"); | |
627 | } | |
ba4e7d97 TH |
628 | goto out; |
629 | } | |
630 | ||
631 | BUG_ON(!atomic_read(&bo->reserved)); | |
632 | ||
633 | evict_mem = bo->mem; | |
634 | evict_mem.mm_node = NULL; | |
82c5da6b | 635 | evict_mem.bus.io_reserved = false; |
ba4e7d97 | 636 | |
7cb7d1d7 JG |
637 | placement.fpfn = 0; |
638 | placement.lpfn = 0; | |
639 | placement.num_placement = 0; | |
640 | placement.num_busy_placement = 0; | |
ca262a99 JG |
641 | bdev->driver->evict_flags(bo, &placement); |
642 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 643 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 644 | if (ret) { |
fb53f862 | 645 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
646 | printk(KERN_ERR TTM_PFX |
647 | "Failed to find memory space for " | |
648 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
649 | ttm_bo_mem_space_debug(bo, &placement); |
650 | } | |
ba4e7d97 TH |
651 | goto out; |
652 | } | |
653 | ||
654 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 655 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 656 | if (ret) { |
98ffc415 | 657 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 658 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
ca262a99 JG |
659 | spin_lock(&glob->lru_lock); |
660 | if (evict_mem.mm_node) { | |
661 | evict_mem.mm_node->private = NULL; | |
662 | drm_mm_put_block(evict_mem.mm_node); | |
663 | evict_mem.mm_node = NULL; | |
664 | } | |
665 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
666 | goto out; |
667 | } | |
ca262a99 JG |
668 | bo->evicted = true; |
669 | out: | |
670 | return ret; | |
671 | } | |
672 | ||
673 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
674 | uint32_t mem_type, | |
9d87fa21 JG |
675 | bool interruptible, bool no_wait_reserve, |
676 | bool no_wait_gpu) | |
ca262a99 JG |
677 | { |
678 | struct ttm_bo_global *glob = bdev->glob; | |
679 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
680 | struct ttm_buffer_object *bo; | |
681 | int ret, put_count = 0; | |
ba4e7d97 | 682 | |
9c51ba1d | 683 | retry: |
a987fcaa | 684 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
685 | if (list_empty(&man->lru)) { |
686 | spin_unlock(&glob->lru_lock); | |
687 | return -EBUSY; | |
688 | } | |
689 | ||
ca262a99 JG |
690 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
691 | kref_get(&bo->list_kref); | |
9c51ba1d | 692 | |
9d87fa21 | 693 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
694 | |
695 | if (unlikely(ret == -EBUSY)) { | |
696 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 697 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
698 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
699 | ||
700 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
701 | ||
702 | /** | |
703 | * We *need* to retry after releasing the lru lock. | |
704 | */ | |
705 | ||
706 | if (unlikely(ret != 0)) | |
707 | return ret; | |
708 | goto retry; | |
709 | } | |
710 | ||
711 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 712 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
713 | |
714 | BUG_ON(ret != 0); | |
715 | ||
ca262a99 JG |
716 | while (put_count--) |
717 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
9c51ba1d | 718 | |
9d87fa21 | 719 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 720 | ttm_bo_unreserve(bo); |
9c51ba1d | 721 | |
ca262a99 | 722 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
723 | return ret; |
724 | } | |
725 | ||
ca262a99 JG |
726 | static int ttm_bo_man_get_node(struct ttm_buffer_object *bo, |
727 | struct ttm_mem_type_manager *man, | |
728 | struct ttm_placement *placement, | |
729 | struct ttm_mem_reg *mem, | |
730 | struct drm_mm_node **node) | |
731 | { | |
732 | struct ttm_bo_global *glob = bo->glob; | |
733 | unsigned long lpfn; | |
734 | int ret; | |
735 | ||
736 | lpfn = placement->lpfn; | |
737 | if (!lpfn) | |
738 | lpfn = man->size; | |
739 | *node = NULL; | |
740 | do { | |
741 | ret = drm_mm_pre_get(&man->manager); | |
742 | if (unlikely(ret)) | |
743 | return ret; | |
744 | ||
745 | spin_lock(&glob->lru_lock); | |
746 | *node = drm_mm_search_free_in_range(&man->manager, | |
747 | mem->num_pages, mem->page_alignment, | |
748 | placement->fpfn, lpfn, 1); | |
749 | if (unlikely(*node == NULL)) { | |
750 | spin_unlock(&glob->lru_lock); | |
751 | return 0; | |
752 | } | |
753 | *node = drm_mm_get_block_atomic_range(*node, mem->num_pages, | |
754 | mem->page_alignment, | |
755 | placement->fpfn, | |
756 | lpfn); | |
757 | spin_unlock(&glob->lru_lock); | |
758 | } while (*node == NULL); | |
759 | return 0; | |
760 | } | |
761 | ||
ba4e7d97 TH |
762 | /** |
763 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
764 | * space, or we've evicted everything and there isn't enough space. | |
765 | */ | |
ca262a99 JG |
766 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
767 | uint32_t mem_type, | |
768 | struct ttm_placement *placement, | |
769 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
770 | bool interruptible, |
771 | bool no_wait_reserve, | |
772 | bool no_wait_gpu) | |
ba4e7d97 | 773 | { |
ca262a99 | 774 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 775 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 776 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ca262a99 | 777 | struct drm_mm_node *node; |
ba4e7d97 TH |
778 | int ret; |
779 | ||
ba4e7d97 | 780 | do { |
ca262a99 JG |
781 | ret = ttm_bo_man_get_node(bo, man, placement, mem, &node); |
782 | if (unlikely(ret != 0)) | |
783 | return ret; | |
ba4e7d97 TH |
784 | if (node) |
785 | break; | |
ca262a99 JG |
786 | spin_lock(&glob->lru_lock); |
787 | if (list_empty(&man->lru)) { | |
788 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 | 789 | break; |
ca262a99 | 790 | } |
a987fcaa | 791 | spin_unlock(&glob->lru_lock); |
ca262a99 | 792 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 793 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
794 | if (unlikely(ret != 0)) |
795 | return ret; | |
ba4e7d97 | 796 | } while (1); |
ca262a99 | 797 | if (node == NULL) |
ba4e7d97 | 798 | return -ENOMEM; |
ba4e7d97 TH |
799 | mem->mm_node = node; |
800 | mem->mem_type = mem_type; | |
801 | return 0; | |
802 | } | |
803 | ||
ae3e8122 TH |
804 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
805 | uint32_t cur_placement, | |
806 | uint32_t proposed_placement) | |
807 | { | |
808 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
809 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
810 | ||
811 | /** | |
812 | * Keep current caching if possible. | |
813 | */ | |
814 | ||
815 | if ((cur_placement & caching) != 0) | |
816 | result |= (cur_placement & caching); | |
817 | else if ((man->default_caching & caching) != 0) | |
818 | result |= man->default_caching; | |
819 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
820 | result |= TTM_PL_FLAG_CACHED; | |
821 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
822 | result |= TTM_PL_FLAG_WC; | |
823 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
824 | result |= TTM_PL_FLAG_UNCACHED; | |
825 | ||
826 | return result; | |
827 | } | |
828 | ||
ba4e7d97 TH |
829 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
830 | bool disallow_fixed, | |
831 | uint32_t mem_type, | |
ae3e8122 TH |
832 | uint32_t proposed_placement, |
833 | uint32_t *masked_placement) | |
ba4e7d97 TH |
834 | { |
835 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
836 | ||
837 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
838 | return false; | |
839 | ||
ae3e8122 | 840 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
841 | return false; |
842 | ||
ae3e8122 | 843 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 844 | return false; |
ba4e7d97 | 845 | |
ae3e8122 TH |
846 | cur_flags |= (proposed_placement & man->available_caching); |
847 | ||
848 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
849 | return true; |
850 | } | |
851 | ||
852 | /** | |
853 | * Creates space for memory region @mem according to its type. | |
854 | * | |
855 | * This function first searches for free space in compatible memory types in | |
856 | * the priority order defined by the driver. If free space isn't found, then | |
857 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
858 | * space. | |
859 | */ | |
860 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
861 | struct ttm_placement *placement, |
862 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
863 | bool interruptible, bool no_wait_reserve, |
864 | bool no_wait_gpu) | |
ba4e7d97 TH |
865 | { |
866 | struct ttm_bo_device *bdev = bo->bdev; | |
867 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
868 | uint32_t mem_type = TTM_PL_SYSTEM; |
869 | uint32_t cur_flags = 0; | |
870 | bool type_found = false; | |
871 | bool type_ok = false; | |
98ffc415 | 872 | bool has_erestartsys = false; |
ba4e7d97 | 873 | struct drm_mm_node *node = NULL; |
ca262a99 | 874 | int i, ret; |
ba4e7d97 TH |
875 | |
876 | mem->mm_node = NULL; | |
b6637526 | 877 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
878 | ret = ttm_mem_type_from_flags(placement->placement[i], |
879 | &mem_type); | |
880 | if (ret) | |
881 | return ret; | |
ba4e7d97 TH |
882 | man = &bdev->man[mem_type]; |
883 | ||
884 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
885 | bo->type == ttm_bo_type_user, |
886 | mem_type, | |
887 | placement->placement[i], | |
888 | &cur_flags); | |
ba4e7d97 TH |
889 | |
890 | if (!type_ok) | |
891 | continue; | |
892 | ||
ae3e8122 TH |
893 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
894 | cur_flags); | |
ca262a99 JG |
895 | /* |
896 | * Use the access and other non-mapping-related flag bits from | |
897 | * the memory placement flags to the current flags | |
898 | */ | |
899 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
900 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 901 | |
ba4e7d97 TH |
902 | if (mem_type == TTM_PL_SYSTEM) |
903 | break; | |
904 | ||
905 | if (man->has_type && man->use_type) { | |
906 | type_found = true; | |
ca262a99 JG |
907 | ret = ttm_bo_man_get_node(bo, man, placement, mem, |
908 | &node); | |
909 | if (unlikely(ret)) | |
910 | return ret; | |
ba4e7d97 TH |
911 | } |
912 | if (node) | |
913 | break; | |
914 | } | |
915 | ||
916 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) { | |
917 | mem->mm_node = node; | |
918 | mem->mem_type = mem_type; | |
919 | mem->placement = cur_flags; | |
ca262a99 JG |
920 | if (node) |
921 | node->private = bo; | |
ba4e7d97 TH |
922 | return 0; |
923 | } | |
924 | ||
925 | if (!type_found) | |
926 | return -EINVAL; | |
927 | ||
b6637526 DA |
928 | for (i = 0; i < placement->num_busy_placement; ++i) { |
929 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
930 | &mem_type); |
931 | if (ret) | |
932 | return ret; | |
ba4e7d97 | 933 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
934 | if (!man->has_type) |
935 | continue; | |
ba4e7d97 | 936 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
937 | bo->type == ttm_bo_type_user, |
938 | mem_type, | |
b6637526 | 939 | placement->busy_placement[i], |
ca262a99 | 940 | &cur_flags)) |
ba4e7d97 TH |
941 | continue; |
942 | ||
ae3e8122 TH |
943 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
944 | cur_flags); | |
ca262a99 JG |
945 | /* |
946 | * Use the access and other non-mapping-related flag bits from | |
947 | * the memory placement flags to the current flags | |
948 | */ | |
b6637526 | 949 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 950 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 951 | |
0eaddb28 TH |
952 | |
953 | if (mem_type == TTM_PL_SYSTEM) { | |
954 | mem->mem_type = mem_type; | |
955 | mem->placement = cur_flags; | |
956 | mem->mm_node = NULL; | |
957 | return 0; | |
958 | } | |
959 | ||
ca262a99 | 960 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 961 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
962 | if (ret == 0 && mem->mm_node) { |
963 | mem->placement = cur_flags; | |
ca262a99 | 964 | mem->mm_node->private = bo; |
ba4e7d97 TH |
965 | return 0; |
966 | } | |
98ffc415 TH |
967 | if (ret == -ERESTARTSYS) |
968 | has_erestartsys = true; | |
ba4e7d97 | 969 | } |
98ffc415 | 970 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
971 | return ret; |
972 | } | |
973 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
974 | ||
975 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
976 | { | |
ba4e7d97 TH |
977 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
978 | return -EBUSY; | |
979 | ||
98ffc415 TH |
980 | return wait_event_interruptible(bo->event_queue, |
981 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 982 | } |
d1ede145 | 983 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
984 | |
985 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 986 | struct ttm_placement *placement, |
9d87fa21 JG |
987 | bool interruptible, bool no_wait_reserve, |
988 | bool no_wait_gpu) | |
ba4e7d97 | 989 | { |
a987fcaa | 990 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
991 | int ret = 0; |
992 | struct ttm_mem_reg mem; | |
993 | ||
994 | BUG_ON(!atomic_read(&bo->reserved)); | |
995 | ||
996 | /* | |
997 | * FIXME: It's possible to pipeline buffer moves. | |
998 | * Have the driver move function wait for idle when necessary, | |
999 | * instead of doing it here. | |
1000 | */ | |
ba4e7d97 | 1001 | spin_lock(&bo->lock); |
9d87fa21 | 1002 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 | 1003 | spin_unlock(&bo->lock); |
ba4e7d97 TH |
1004 | if (ret) |
1005 | return ret; | |
ba4e7d97 TH |
1006 | mem.num_pages = bo->num_pages; |
1007 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1008 | mem.page_alignment = bo->mem.page_alignment; | |
82c5da6b | 1009 | mem.bus.io_reserved = false; |
ba4e7d97 TH |
1010 | /* |
1011 | * Determine where to move the buffer. | |
1012 | */ | |
9d87fa21 | 1013 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1014 | if (ret) |
1015 | goto out_unlock; | |
9d87fa21 | 1016 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1017 | out_unlock: |
1018 | if (ret && mem.mm_node) { | |
a987fcaa | 1019 | spin_lock(&glob->lru_lock); |
ca262a99 | 1020 | mem.mm_node->private = NULL; |
ba4e7d97 | 1021 | drm_mm_put_block(mem.mm_node); |
a987fcaa | 1022 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1023 | } |
1024 | return ret; | |
1025 | } | |
1026 | ||
ca262a99 | 1027 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1028 | struct ttm_mem_reg *mem) |
1029 | { | |
ca262a99 | 1030 | int i; |
e22238ea TH |
1031 | struct drm_mm_node *node = mem->mm_node; |
1032 | ||
1033 | if (node && placement->lpfn != 0 && | |
1034 | (node->start < placement->fpfn || | |
1035 | node->start + node->size > placement->lpfn)) | |
1036 | return -1; | |
ca262a99 JG |
1037 | |
1038 | for (i = 0; i < placement->num_placement; i++) { | |
1039 | if ((placement->placement[i] & mem->placement & | |
1040 | TTM_PL_MASK_CACHING) && | |
1041 | (placement->placement[i] & mem->placement & | |
1042 | TTM_PL_MASK_MEM)) | |
1043 | return i; | |
1044 | } | |
1045 | return -1; | |
ba4e7d97 TH |
1046 | } |
1047 | ||
09855acb JG |
1048 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1049 | struct ttm_placement *placement, | |
9d87fa21 JG |
1050 | bool interruptible, bool no_wait_reserve, |
1051 | bool no_wait_gpu) | |
ba4e7d97 TH |
1052 | { |
1053 | int ret; | |
1054 | ||
1055 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1056 | /* Check that range is valid */ |
1057 | if (placement->lpfn || placement->fpfn) | |
1058 | if (placement->fpfn > placement->lpfn || | |
1059 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1060 | return -EINVAL; | |
ba4e7d97 TH |
1061 | /* |
1062 | * Check whether we need to move buffer. | |
1063 | */ | |
ca262a99 JG |
1064 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1065 | if (ret < 0) { | |
9d87fa21 | 1066 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1067 | if (ret) |
ba4e7d97 | 1068 | return ret; |
ca262a99 JG |
1069 | } else { |
1070 | /* | |
1071 | * Use the access and other non-mapping-related flag bits from | |
1072 | * the compatible memory placement flags to the active flags | |
1073 | */ | |
1074 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1075 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1076 | } |
ba4e7d97 TH |
1077 | /* |
1078 | * We might need to add a TTM. | |
1079 | */ | |
ba4e7d97 TH |
1080 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1081 | ret = ttm_bo_add_ttm(bo, true); | |
1082 | if (ret) | |
1083 | return ret; | |
1084 | } | |
ba4e7d97 TH |
1085 | return 0; |
1086 | } | |
09855acb | 1087 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1088 | |
09855acb JG |
1089 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1090 | struct ttm_placement *placement) | |
ba4e7d97 | 1091 | { |
09855acb | 1092 | int i; |
ba4e7d97 | 1093 | |
09855acb JG |
1094 | if (placement->fpfn || placement->lpfn) { |
1095 | if (bo->mem.num_pages > (placement->lpfn - placement->fpfn)) { | |
1096 | printk(KERN_ERR TTM_PFX "Page number range to small " | |
1097 | "Need %lu pages, range is [%u, %u]\n", | |
1098 | bo->mem.num_pages, placement->fpfn, | |
1099 | placement->lpfn); | |
ba4e7d97 TH |
1100 | return -EINVAL; |
1101 | } | |
09855acb JG |
1102 | } |
1103 | for (i = 0; i < placement->num_placement; i++) { | |
1104 | if (!capable(CAP_SYS_ADMIN)) { | |
1105 | if (placement->placement[i] & TTM_PL_FLAG_NO_EVICT) { | |
1106 | printk(KERN_ERR TTM_PFX "Need to be root to " | |
1107 | "modify NO_EVICT status.\n"); | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | } | |
1111 | } | |
1112 | for (i = 0; i < placement->num_busy_placement; i++) { | |
1113 | if (!capable(CAP_SYS_ADMIN)) { | |
1114 | if (placement->busy_placement[i] & TTM_PL_FLAG_NO_EVICT) { | |
1115 | printk(KERN_ERR TTM_PFX "Need to be root to " | |
1116 | "modify NO_EVICT status.\n"); | |
1117 | return -EINVAL; | |
1118 | } | |
ba4e7d97 TH |
1119 | } |
1120 | } | |
1121 | return 0; | |
1122 | } | |
1123 | ||
09855acb JG |
1124 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1125 | struct ttm_buffer_object *bo, | |
1126 | unsigned long size, | |
1127 | enum ttm_bo_type type, | |
1128 | struct ttm_placement *placement, | |
1129 | uint32_t page_alignment, | |
1130 | unsigned long buffer_start, | |
1131 | bool interruptible, | |
1132 | struct file *persistant_swap_storage, | |
1133 | size_t acc_size, | |
1134 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1135 | { |
09855acb | 1136 | int ret = 0; |
ba4e7d97 TH |
1137 | unsigned long num_pages; |
1138 | ||
1139 | size += buffer_start & ~PAGE_MASK; | |
1140 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1141 | if (num_pages == 0) { | |
1142 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
1143 | return -EINVAL; | |
1144 | } | |
1145 | bo->destroy = destroy; | |
1146 | ||
1147 | spin_lock_init(&bo->lock); | |
1148 | kref_init(&bo->kref); | |
1149 | kref_init(&bo->list_kref); | |
1150 | atomic_set(&bo->cpu_writers, 0); | |
1151 | atomic_set(&bo->reserved, 1); | |
1152 | init_waitqueue_head(&bo->event_queue); | |
1153 | INIT_LIST_HEAD(&bo->lru); | |
1154 | INIT_LIST_HEAD(&bo->ddestroy); | |
1155 | INIT_LIST_HEAD(&bo->swap); | |
1156 | bo->bdev = bdev; | |
a987fcaa | 1157 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1158 | bo->type = type; |
1159 | bo->num_pages = num_pages; | |
eb6d2c39 | 1160 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1161 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1162 | bo->mem.num_pages = bo->num_pages; | |
1163 | bo->mem.mm_node = NULL; | |
1164 | bo->mem.page_alignment = page_alignment; | |
82c5da6b | 1165 | bo->mem.bus.io_reserved = false; |
ba4e7d97 TH |
1166 | bo->buffer_start = buffer_start & PAGE_MASK; |
1167 | bo->priv_flags = 0; | |
1168 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1169 | bo->seq_valid = false; | |
1170 | bo->persistant_swap_storage = persistant_swap_storage; | |
1171 | bo->acc_size = acc_size; | |
a987fcaa | 1172 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1173 | |
09855acb | 1174 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1175 | if (unlikely(ret != 0)) |
1176 | goto out_err; | |
1177 | ||
ba4e7d97 TH |
1178 | /* |
1179 | * For ttm_bo_type_device buffers, allocate | |
1180 | * address space from the device. | |
1181 | */ | |
ba4e7d97 TH |
1182 | if (bo->type == ttm_bo_type_device) { |
1183 | ret = ttm_bo_setup_vm(bo); | |
1184 | if (ret) | |
1185 | goto out_err; | |
1186 | } | |
1187 | ||
9d87fa21 | 1188 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1189 | if (ret) |
1190 | goto out_err; | |
1191 | ||
1192 | ttm_bo_unreserve(bo); | |
1193 | return 0; | |
1194 | ||
1195 | out_err: | |
1196 | ttm_bo_unreserve(bo); | |
1197 | ttm_bo_unref(&bo); | |
1198 | ||
1199 | return ret; | |
1200 | } | |
09855acb | 1201 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1202 | |
a987fcaa | 1203 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1204 | unsigned long num_pages) |
1205 | { | |
1206 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1207 | PAGE_MASK; | |
1208 | ||
a987fcaa | 1209 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1210 | } |
1211 | ||
09855acb JG |
1212 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1213 | unsigned long size, | |
1214 | enum ttm_bo_type type, | |
1215 | struct ttm_placement *placement, | |
1216 | uint32_t page_alignment, | |
1217 | unsigned long buffer_start, | |
1218 | bool interruptible, | |
1219 | struct file *persistant_swap_storage, | |
1220 | struct ttm_buffer_object **p_bo) | |
ba4e7d97 TH |
1221 | { |
1222 | struct ttm_buffer_object *bo; | |
a987fcaa | 1223 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1224 | int ret; |
ba4e7d97 TH |
1225 | |
1226 | size_t acc_size = | |
a987fcaa | 1227 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1228 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1229 | if (unlikely(ret != 0)) |
1230 | return ret; | |
1231 | ||
1232 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1233 | ||
1234 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1235 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1236 | return -ENOMEM; |
1237 | } | |
1238 | ||
09855acb JG |
1239 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1240 | buffer_start, interruptible, | |
1241 | persistant_swap_storage, acc_size, NULL); | |
ba4e7d97 TH |
1242 | if (likely(ret == 0)) |
1243 | *p_bo = bo; | |
1244 | ||
1245 | return ret; | |
1246 | } | |
1247 | ||
ba4e7d97 | 1248 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1249 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1250 | { |
ca262a99 | 1251 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1252 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1253 | int ret; |
ba4e7d97 TH |
1254 | |
1255 | /* | |
1256 | * Can't use standard list traversal since we're unlocking. | |
1257 | */ | |
1258 | ||
a987fcaa | 1259 | spin_lock(&glob->lru_lock); |
ca262a99 | 1260 | while (!list_empty(&man->lru)) { |
a987fcaa | 1261 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1262 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1263 | if (ret) { |
1264 | if (allow_errors) { | |
1265 | return ret; | |
1266 | } else { | |
1267 | printk(KERN_ERR TTM_PFX | |
1268 | "Cleanup eviction failed\n"); | |
1269 | } | |
1270 | } | |
a987fcaa | 1271 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1272 | } |
a987fcaa | 1273 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1274 | return 0; |
1275 | } | |
1276 | ||
1277 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1278 | { | |
a987fcaa | 1279 | struct ttm_bo_global *glob = bdev->glob; |
c96e7c7a | 1280 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1281 | int ret = -EINVAL; |
1282 | ||
1283 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1284 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1285 | return ret; | |
1286 | } | |
c96e7c7a | 1287 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1288 | |
1289 | if (!man->has_type) { | |
1290 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1291 | "memory manager type %u\n", mem_type); | |
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | man->use_type = false; | |
1296 | man->has_type = false; | |
1297 | ||
1298 | ret = 0; | |
1299 | if (mem_type > 0) { | |
ca262a99 | 1300 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1301 | |
a987fcaa | 1302 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1303 | if (drm_mm_clean(&man->manager)) |
1304 | drm_mm_takedown(&man->manager); | |
1305 | else | |
1306 | ret = -EBUSY; | |
1307 | ||
a987fcaa | 1308 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1309 | } |
1310 | ||
1311 | return ret; | |
1312 | } | |
1313 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1314 | ||
1315 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1316 | { | |
1317 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1318 | ||
1319 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1320 | printk(KERN_ERR TTM_PFX | |
1321 | "Illegal memory manager memory type %u.\n", | |
1322 | mem_type); | |
1323 | return -EINVAL; | |
1324 | } | |
1325 | ||
1326 | if (!man->has_type) { | |
1327 | printk(KERN_ERR TTM_PFX | |
1328 | "Memory type %u has not been initialized.\n", | |
1329 | mem_type); | |
1330 | return 0; | |
1331 | } | |
1332 | ||
ca262a99 | 1333 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1334 | } |
1335 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1336 | ||
1337 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1338 | unsigned long p_size) |
ba4e7d97 TH |
1339 | { |
1340 | int ret = -EINVAL; | |
1341 | struct ttm_mem_type_manager *man; | |
1342 | ||
1343 | if (type >= TTM_NUM_MEM_TYPES) { | |
1344 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); | |
1345 | return ret; | |
1346 | } | |
1347 | ||
1348 | man = &bdev->man[type]; | |
1349 | if (man->has_type) { | |
1350 | printk(KERN_ERR TTM_PFX | |
1351 | "Memory manager already initialized for type %d\n", | |
1352 | type); | |
1353 | return ret; | |
1354 | } | |
1355 | ||
1356 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1357 | if (ret) | |
1358 | return ret; | |
1359 | ||
1360 | ret = 0; | |
1361 | if (type != TTM_PL_SYSTEM) { | |
1362 | if (!p_size) { | |
1363 | printk(KERN_ERR TTM_PFX | |
1364 | "Zero size memory manager type %d\n", | |
1365 | type); | |
1366 | return ret; | |
1367 | } | |
ca262a99 | 1368 | ret = drm_mm_init(&man->manager, 0, p_size); |
ba4e7d97 TH |
1369 | if (ret) |
1370 | return ret; | |
1371 | } | |
1372 | man->has_type = true; | |
1373 | man->use_type = true; | |
1374 | man->size = p_size; | |
1375 | ||
1376 | INIT_LIST_HEAD(&man->lru); | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1381 | ||
a987fcaa TH |
1382 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1383 | { | |
1384 | struct ttm_bo_global *glob = | |
1385 | container_of(kobj, struct ttm_bo_global, kobj); | |
1386 | ||
a987fcaa TH |
1387 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1388 | __free_page(glob->dummy_read_page); | |
1389 | kfree(glob); | |
1390 | } | |
1391 | ||
1392 | void ttm_bo_global_release(struct ttm_global_reference *ref) | |
1393 | { | |
1394 | struct ttm_bo_global *glob = ref->object; | |
1395 | ||
1396 | kobject_del(&glob->kobj); | |
1397 | kobject_put(&glob->kobj); | |
1398 | } | |
1399 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1400 | ||
1401 | int ttm_bo_global_init(struct ttm_global_reference *ref) | |
1402 | { | |
1403 | struct ttm_bo_global_ref *bo_ref = | |
1404 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1405 | struct ttm_bo_global *glob = ref->object; | |
1406 | int ret; | |
1407 | ||
1408 | mutex_init(&glob->device_list_mutex); | |
1409 | spin_lock_init(&glob->lru_lock); | |
1410 | glob->mem_glob = bo_ref->mem_glob; | |
1411 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1412 | ||
1413 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1414 | ret = -ENOMEM; | |
1415 | goto out_no_drp; | |
1416 | } | |
1417 | ||
1418 | INIT_LIST_HEAD(&glob->swap_lru); | |
1419 | INIT_LIST_HEAD(&glob->device_list); | |
1420 | ||
1421 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1422 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1423 | if (unlikely(ret != 0)) { | |
1424 | printk(KERN_ERR TTM_PFX | |
1425 | "Could not register buffer object swapout.\n"); | |
1426 | goto out_no_shrink; | |
1427 | } | |
1428 | ||
1429 | glob->ttm_bo_extra_size = | |
1430 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1431 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1432 | ||
1433 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1434 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1435 | ||
1436 | atomic_set(&glob->bo_count, 0); | |
1437 | ||
b642ed06 RD |
1438 | ret = kobject_init_and_add( |
1439 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1440 | if (unlikely(ret != 0)) |
1441 | kobject_put(&glob->kobj); | |
1442 | return ret; | |
1443 | out_no_shrink: | |
1444 | __free_page(glob->dummy_read_page); | |
1445 | out_no_drp: | |
1446 | kfree(glob); | |
1447 | return ret; | |
1448 | } | |
1449 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1450 | ||
1451 | ||
ba4e7d97 TH |
1452 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1453 | { | |
1454 | int ret = 0; | |
1455 | unsigned i = TTM_NUM_MEM_TYPES; | |
1456 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1457 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1458 | |
1459 | while (i--) { | |
1460 | man = &bdev->man[i]; | |
1461 | if (man->has_type) { | |
1462 | man->use_type = false; | |
1463 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1464 | ret = -EBUSY; | |
1465 | printk(KERN_ERR TTM_PFX | |
1466 | "DRM memory manager type %d " | |
1467 | "is not clean.\n", i); | |
1468 | } | |
1469 | man->has_type = false; | |
1470 | } | |
1471 | } | |
1472 | ||
a987fcaa TH |
1473 | mutex_lock(&glob->device_list_mutex); |
1474 | list_del(&bdev->device_list); | |
1475 | mutex_unlock(&glob->device_list_mutex); | |
1476 | ||
ba4e7d97 TH |
1477 | if (!cancel_delayed_work(&bdev->wq)) |
1478 | flush_scheduled_work(); | |
1479 | ||
1480 | while (ttm_bo_delayed_delete(bdev, true)) | |
1481 | ; | |
1482 | ||
a987fcaa | 1483 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1484 | if (list_empty(&bdev->ddestroy)) |
1485 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1486 | ||
1487 | if (list_empty(&bdev->man[0].lru)) | |
1488 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1489 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1490 | |
ba4e7d97 TH |
1491 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1492 | write_lock(&bdev->vm_lock); | |
1493 | drm_mm_takedown(&bdev->addr_space_mm); | |
1494 | write_unlock(&bdev->vm_lock); | |
1495 | ||
ba4e7d97 TH |
1496 | return ret; |
1497 | } | |
1498 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1499 | ||
ba4e7d97 | 1500 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1501 | struct ttm_bo_global *glob, |
1502 | struct ttm_bo_driver *driver, | |
51c8b407 | 1503 | uint64_t file_page_offset, |
ad49f501 | 1504 | bool need_dma32) |
ba4e7d97 TH |
1505 | { |
1506 | int ret = -EINVAL; | |
1507 | ||
ba4e7d97 | 1508 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1509 | bdev->driver = driver; |
ba4e7d97 TH |
1510 | |
1511 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1512 | ||
ba4e7d97 TH |
1513 | /* |
1514 | * Initialize the system memory buffer type. | |
1515 | * Other types need to be driver / IOCTL initialized. | |
1516 | */ | |
ca262a99 | 1517 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1518 | if (unlikely(ret != 0)) |
a987fcaa | 1519 | goto out_no_sys; |
ba4e7d97 TH |
1520 | |
1521 | bdev->addr_space_rb = RB_ROOT; | |
1522 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1523 | if (unlikely(ret != 0)) | |
a987fcaa | 1524 | goto out_no_addr_mm; |
ba4e7d97 TH |
1525 | |
1526 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1527 | bdev->nice_mode = true; | |
1528 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1529 | bdev->dev_mapping = NULL; |
a987fcaa | 1530 | bdev->glob = glob; |
ad49f501 | 1531 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1532 | |
a987fcaa TH |
1533 | mutex_lock(&glob->device_list_mutex); |
1534 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1535 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1536 | |
1537 | return 0; | |
a987fcaa | 1538 | out_no_addr_mm: |
ba4e7d97 | 1539 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1540 | out_no_sys: |
ba4e7d97 TH |
1541 | return ret; |
1542 | } | |
1543 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1544 | ||
1545 | /* | |
1546 | * buffer object vm functions. | |
1547 | */ | |
1548 | ||
1549 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1550 | { | |
1551 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1552 | ||
1553 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1554 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1555 | return false; | |
1556 | ||
1557 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1558 | return false; | |
1559 | ||
1560 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1561 | return false; | |
1562 | } | |
1563 | return true; | |
1564 | } | |
1565 | ||
1566 | int ttm_bo_pci_offset(struct ttm_bo_device *bdev, | |
1567 | struct ttm_mem_reg *mem, | |
1568 | unsigned long *bus_base, | |
1569 | unsigned long *bus_offset, unsigned long *bus_size) | |
1570 | { | |
1571 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1572 | ||
1573 | *bus_size = 0; | |
1574 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
1575 | return -EINVAL; | |
1576 | ||
1577 | if (ttm_mem_reg_is_pci(bdev, mem)) { | |
1578 | *bus_offset = mem->mm_node->start << PAGE_SHIFT; | |
1579 | *bus_size = mem->num_pages << PAGE_SHIFT; | |
82c5da6b | 1580 | *bus_base = man->io_offset + (uintptr_t)man->io_addr; |
ba4e7d97 TH |
1581 | } |
1582 | ||
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1587 | { | |
1588 | struct ttm_bo_device *bdev = bo->bdev; | |
1589 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1590 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1591 | ||
1592 | if (!bdev->dev_mapping) | |
1593 | return; | |
ba4e7d97 | 1594 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
82c5da6b | 1595 | ttm_mem_io_free(bdev, &bo->mem); |
ba4e7d97 | 1596 | } |
e024e110 | 1597 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1598 | |
1599 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1600 | { | |
1601 | struct ttm_bo_device *bdev = bo->bdev; | |
1602 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1603 | struct rb_node *parent = NULL; | |
1604 | struct ttm_buffer_object *cur_bo; | |
1605 | unsigned long offset = bo->vm_node->start; | |
1606 | unsigned long cur_offset; | |
1607 | ||
1608 | while (*cur) { | |
1609 | parent = *cur; | |
1610 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1611 | cur_offset = cur_bo->vm_node->start; | |
1612 | if (offset < cur_offset) | |
1613 | cur = &parent->rb_left; | |
1614 | else if (offset > cur_offset) | |
1615 | cur = &parent->rb_right; | |
1616 | else | |
1617 | BUG(); | |
1618 | } | |
1619 | ||
1620 | rb_link_node(&bo->vm_rb, parent, cur); | |
1621 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1622 | } | |
1623 | ||
1624 | /** | |
1625 | * ttm_bo_setup_vm: | |
1626 | * | |
1627 | * @bo: the buffer to allocate address space for | |
1628 | * | |
1629 | * Allocate address space in the drm device so that applications | |
1630 | * can mmap the buffer and access the contents. This only | |
1631 | * applies to ttm_bo_type_device objects as others are not | |
1632 | * placed in the drm device address space. | |
1633 | */ | |
1634 | ||
1635 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1636 | { | |
1637 | struct ttm_bo_device *bdev = bo->bdev; | |
1638 | int ret; | |
1639 | ||
1640 | retry_pre_get: | |
1641 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1642 | if (unlikely(ret != 0)) | |
1643 | return ret; | |
1644 | ||
1645 | write_lock(&bdev->vm_lock); | |
1646 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1647 | bo->mem.num_pages, 0, 0); | |
1648 | ||
1649 | if (unlikely(bo->vm_node == NULL)) { | |
1650 | ret = -ENOMEM; | |
1651 | goto out_unlock; | |
1652 | } | |
1653 | ||
1654 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1655 | bo->mem.num_pages, 0); | |
1656 | ||
1657 | if (unlikely(bo->vm_node == NULL)) { | |
1658 | write_unlock(&bdev->vm_lock); | |
1659 | goto retry_pre_get; | |
1660 | } | |
1661 | ||
1662 | ttm_bo_vm_insert_rb(bo); | |
1663 | write_unlock(&bdev->vm_lock); | |
1664 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1665 | ||
1666 | return 0; | |
1667 | out_unlock: | |
1668 | write_unlock(&bdev->vm_lock); | |
1669 | return ret; | |
1670 | } | |
1671 | ||
1672 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1673 | bool lazy, bool interruptible, bool no_wait) | |
1674 | { | |
1675 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1676 | void *sync_obj; | |
1677 | void *sync_obj_arg; | |
1678 | int ret = 0; | |
1679 | ||
1680 | if (likely(bo->sync_obj == NULL)) | |
1681 | return 0; | |
1682 | ||
1683 | while (bo->sync_obj) { | |
1684 | ||
1685 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1686 | void *tmp_obj = bo->sync_obj; | |
1687 | bo->sync_obj = NULL; | |
1688 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1689 | spin_unlock(&bo->lock); | |
1690 | driver->sync_obj_unref(&tmp_obj); | |
1691 | spin_lock(&bo->lock); | |
1692 | continue; | |
1693 | } | |
1694 | ||
1695 | if (no_wait) | |
1696 | return -EBUSY; | |
1697 | ||
1698 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1699 | sync_obj_arg = bo->sync_obj_arg; | |
1700 | spin_unlock(&bo->lock); | |
1701 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1702 | lazy, interruptible); | |
1703 | if (unlikely(ret != 0)) { | |
1704 | driver->sync_obj_unref(&sync_obj); | |
1705 | spin_lock(&bo->lock); | |
1706 | return ret; | |
1707 | } | |
1708 | spin_lock(&bo->lock); | |
1709 | if (likely(bo->sync_obj == sync_obj && | |
1710 | bo->sync_obj_arg == sync_obj_arg)) { | |
1711 | void *tmp_obj = bo->sync_obj; | |
1712 | bo->sync_obj = NULL; | |
1713 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1714 | &bo->priv_flags); | |
1715 | spin_unlock(&bo->lock); | |
1716 | driver->sync_obj_unref(&sync_obj); | |
1717 | driver->sync_obj_unref(&tmp_obj); | |
1718 | spin_lock(&bo->lock); | |
fee280d3 TH |
1719 | } else { |
1720 | spin_unlock(&bo->lock); | |
1721 | driver->sync_obj_unref(&sync_obj); | |
1722 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1723 | } |
1724 | } | |
1725 | return 0; | |
1726 | } | |
1727 | EXPORT_SYMBOL(ttm_bo_wait); | |
1728 | ||
1729 | void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo) | |
1730 | { | |
1731 | atomic_set(&bo->reserved, 0); | |
1732 | wake_up_all(&bo->event_queue); | |
1733 | } | |
1734 | ||
1735 | int ttm_bo_block_reservation(struct ttm_buffer_object *bo, bool interruptible, | |
1736 | bool no_wait) | |
1737 | { | |
1738 | int ret; | |
1739 | ||
1740 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
1741 | if (no_wait) | |
1742 | return -EBUSY; | |
1743 | else if (interruptible) { | |
1744 | ret = wait_event_interruptible | |
1745 | (bo->event_queue, atomic_read(&bo->reserved) == 0); | |
1746 | if (unlikely(ret != 0)) | |
98ffc415 | 1747 | return ret; |
ba4e7d97 TH |
1748 | } else { |
1749 | wait_event(bo->event_queue, | |
1750 | atomic_read(&bo->reserved) == 0); | |
1751 | } | |
1752 | } | |
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) | |
1757 | { | |
1758 | int ret = 0; | |
1759 | ||
1760 | /* | |
1761 | * Using ttm_bo_reserve instead of ttm_bo_block_reservation | |
1762 | * makes sure the lru lists are updated. | |
1763 | */ | |
1764 | ||
1765 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1766 | if (unlikely(ret != 0)) | |
1767 | return ret; | |
1768 | spin_lock(&bo->lock); | |
1769 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1770 | spin_unlock(&bo->lock); | |
1771 | if (likely(ret == 0)) | |
1772 | atomic_inc(&bo->cpu_writers); | |
1773 | ttm_bo_unreserve(bo); | |
1774 | return ret; | |
1775 | } | |
d1ede145 | 1776 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1777 | |
1778 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1779 | { | |
1780 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1781 | wake_up_all(&bo->event_queue); | |
1782 | } | |
d1ede145 | 1783 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1784 | |
1785 | /** | |
1786 | * A buffer object shrink method that tries to swap out the first | |
1787 | * buffer object on the bo_global::swap_lru list. | |
1788 | */ | |
1789 | ||
1790 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1791 | { | |
a987fcaa TH |
1792 | struct ttm_bo_global *glob = |
1793 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1794 | struct ttm_buffer_object *bo; |
1795 | int ret = -EBUSY; | |
1796 | int put_count; | |
1797 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1798 | ||
a987fcaa | 1799 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1800 | while (ret == -EBUSY) { |
a987fcaa TH |
1801 | if (unlikely(list_empty(&glob->swap_lru))) { |
1802 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1803 | return -EBUSY; |
1804 | } | |
1805 | ||
a987fcaa | 1806 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1807 | struct ttm_buffer_object, swap); |
1808 | kref_get(&bo->list_kref); | |
1809 | ||
1810 | /** | |
1811 | * Reserve buffer. Since we unlock while sleeping, we need | |
1812 | * to re-check that nobody removed us from the swap-list while | |
1813 | * we slept. | |
1814 | */ | |
1815 | ||
1816 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1817 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1818 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1819 | ttm_bo_wait_unreserved(bo, false); |
1820 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1821 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1822 | } |
1823 | } | |
1824 | ||
1825 | BUG_ON(ret != 0); | |
1826 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1827 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1828 | |
1829 | while (put_count--) | |
1830 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
1831 | ||
1832 | /** | |
1833 | * Wait for GPU, then move to system cached. | |
1834 | */ | |
1835 | ||
1836 | spin_lock(&bo->lock); | |
1837 | ret = ttm_bo_wait(bo, false, false, false); | |
1838 | spin_unlock(&bo->lock); | |
1839 | ||
1840 | if (unlikely(ret != 0)) | |
1841 | goto out; | |
1842 | ||
1843 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1844 | struct ttm_mem_reg evict_mem; | |
1845 | ||
1846 | evict_mem = bo->mem; | |
1847 | evict_mem.mm_node = NULL; | |
1848 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1849 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1850 | ||
1851 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1852 | false, false, false); |
ba4e7d97 TH |
1853 | if (unlikely(ret != 0)) |
1854 | goto out; | |
1855 | } | |
1856 | ||
1857 | ttm_bo_unmap_virtual(bo); | |
1858 | ||
1859 | /** | |
1860 | * Swap out. Buffer will be swapped in again as soon as | |
1861 | * anyone tries to access a ttm page. | |
1862 | */ | |
1863 | ||
3f09ea4e TH |
1864 | if (bo->bdev->driver->swap_notify) |
1865 | bo->bdev->driver->swap_notify(bo); | |
1866 | ||
ba4e7d97 TH |
1867 | ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage); |
1868 | out: | |
1869 | ||
1870 | /** | |
1871 | * | |
1872 | * Unreserve without putting on LRU to avoid swapping out an | |
1873 | * already swapped buffer. | |
1874 | */ | |
1875 | ||
1876 | atomic_set(&bo->reserved, 0); | |
1877 | wake_up_all(&bo->event_queue); | |
1878 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1879 | return ret; | |
1880 | } | |
1881 | ||
1882 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1883 | { | |
a987fcaa | 1884 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1885 | ; |
1886 | } | |
e99e1e78 | 1887 | EXPORT_SYMBOL(ttm_bo_swapout_all); |