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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 | */ | |
30 | ||
31 | #include "ttm/ttm_module.h" | |
32 | #include "ttm/ttm_bo_driver.h" | |
33 | #include "ttm/ttm_placement.h" | |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/file.h> | |
39 | #include <linux/module.h> | |
60063497 | 40 | #include <linux/atomic.h> |
ba4e7d97 TH |
41 | |
42 | #define TTM_ASSERT_LOCKED(param) | |
43 | #define TTM_DEBUG(fmt, arg...) | |
44 | #define TTM_BO_HASH_ORDER 13 | |
45 | ||
46 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 | 47 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
a987fcaa TH |
48 | static void ttm_bo_global_kobj_release(struct kobject *kobj); |
49 | ||
50 | static struct attribute ttm_bo_count = { | |
51 | .name = "bo_count", | |
52 | .mode = S_IRUGO | |
53 | }; | |
54 | ||
fb53f862 JG |
55 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
56 | { | |
57 | int i; | |
58 | ||
59 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
60 | if (flags & (1 << i)) { | |
61 | *mem_type = i; | |
62 | return 0; | |
63 | } | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
5012f506 | 67 | static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
fb53f862 | 68 | { |
5012f506 JG |
69 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
70 | ||
fb53f862 JG |
71 | printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type); |
72 | printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type); | |
73 | printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags); | |
74 | printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset); | |
eb6d2c39 | 75 | printk(KERN_ERR TTM_PFX " size: %llu\n", man->size); |
fb53f862 JG |
76 | printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n", |
77 | man->available_caching); | |
78 | printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n", | |
79 | man->default_caching); | |
d961db75 BS |
80 | if (mem_type != TTM_PL_SYSTEM) |
81 | (*man->func->debug)(man, TTM_PFX); | |
fb53f862 JG |
82 | } |
83 | ||
84 | static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, | |
85 | struct ttm_placement *placement) | |
86 | { | |
fb53f862 JG |
87 | int i, ret, mem_type; |
88 | ||
eb6d2c39 | 89 | printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n", |
fb53f862 JG |
90 | bo, bo->mem.num_pages, bo->mem.size >> 10, |
91 | bo->mem.size >> 20); | |
92 | for (i = 0; i < placement->num_placement; i++) { | |
93 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
94 | &mem_type); | |
95 | if (ret) | |
96 | return; | |
fb53f862 JG |
97 | printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n", |
98 | i, placement->placement[i], mem_type); | |
5012f506 | 99 | ttm_mem_type_debug(bo->bdev, mem_type); |
fb53f862 JG |
100 | } |
101 | } | |
102 | ||
a987fcaa TH |
103 | static ssize_t ttm_bo_global_show(struct kobject *kobj, |
104 | struct attribute *attr, | |
105 | char *buffer) | |
106 | { | |
107 | struct ttm_bo_global *glob = | |
108 | container_of(kobj, struct ttm_bo_global, kobj); | |
109 | ||
110 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
111 | (unsigned long) atomic_read(&glob->bo_count)); | |
112 | } | |
113 | ||
114 | static struct attribute *ttm_bo_global_attrs[] = { | |
115 | &ttm_bo_count, | |
116 | NULL | |
117 | }; | |
118 | ||
52cf25d0 | 119 | static const struct sysfs_ops ttm_bo_global_ops = { |
a987fcaa TH |
120 | .show = &ttm_bo_global_show |
121 | }; | |
122 | ||
123 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
124 | .release = &ttm_bo_global_kobj_release, | |
125 | .sysfs_ops = &ttm_bo_global_ops, | |
126 | .default_attrs = ttm_bo_global_attrs | |
127 | }; | |
128 | ||
ba4e7d97 TH |
129 | |
130 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
131 | { | |
132 | return 1 << (type); | |
133 | } | |
134 | ||
135 | static void ttm_bo_release_list(struct kref *list_kref) | |
136 | { | |
137 | struct ttm_buffer_object *bo = | |
138 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
139 | struct ttm_bo_device *bdev = bo->bdev; | |
57de4ba9 | 140 | size_t acc_size = bo->acc_size; |
ba4e7d97 TH |
141 | |
142 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
143 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
144 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
145 | BUG_ON(bo->sync_obj != NULL); | |
146 | BUG_ON(bo->mem.mm_node != NULL); | |
147 | BUG_ON(!list_empty(&bo->lru)); | |
148 | BUG_ON(!list_empty(&bo->ddestroy)); | |
149 | ||
150 | if (bo->ttm) | |
151 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 152 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
153 | if (bo->destroy) |
154 | bo->destroy(bo); | |
155 | else { | |
ba4e7d97 TH |
156 | kfree(bo); |
157 | } | |
57de4ba9 | 158 | ttm_mem_global_free(bdev->glob->mem_glob, acc_size); |
ba4e7d97 TH |
159 | } |
160 | ||
161 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
162 | { | |
ba4e7d97 | 163 | if (interruptible) { |
965d3807 | 164 | return wait_event_interruptible(bo->event_queue, |
ba4e7d97 | 165 | atomic_read(&bo->reserved) == 0); |
ba4e7d97 TH |
166 | } else { |
167 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
965d3807 | 168 | return 0; |
ba4e7d97 | 169 | } |
ba4e7d97 | 170 | } |
d1ede145 | 171 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 | 172 | |
d6ea8886 | 173 | void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
174 | { |
175 | struct ttm_bo_device *bdev = bo->bdev; | |
176 | struct ttm_mem_type_manager *man; | |
177 | ||
178 | BUG_ON(!atomic_read(&bo->reserved)); | |
179 | ||
180 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
181 | ||
182 | BUG_ON(!list_empty(&bo->lru)); | |
183 | ||
184 | man = &bdev->man[bo->mem.mem_type]; | |
185 | list_add_tail(&bo->lru, &man->lru); | |
186 | kref_get(&bo->list_kref); | |
187 | ||
188 | if (bo->ttm != NULL) { | |
a987fcaa | 189 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
190 | kref_get(&bo->list_kref); |
191 | } | |
192 | } | |
193 | } | |
194 | ||
d6ea8886 | 195 | int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
196 | { |
197 | int put_count = 0; | |
198 | ||
199 | if (!list_empty(&bo->swap)) { | |
200 | list_del_init(&bo->swap); | |
201 | ++put_count; | |
202 | } | |
203 | if (!list_empty(&bo->lru)) { | |
204 | list_del_init(&bo->lru); | |
205 | ++put_count; | |
206 | } | |
207 | ||
208 | /* | |
209 | * TODO: Add a driver hook to delete from | |
210 | * driver-specific LRU's here. | |
211 | */ | |
212 | ||
213 | return put_count; | |
214 | } | |
215 | ||
216 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
217 | bool interruptible, | |
218 | bool no_wait, bool use_sequence, uint32_t sequence) | |
219 | { | |
a987fcaa | 220 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
221 | int ret; |
222 | ||
223 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
95ccb0f3 TH |
224 | /** |
225 | * Deadlock avoidance for multi-bo reserving. | |
226 | */ | |
96726fe5 TH |
227 | if (use_sequence && bo->seq_valid) { |
228 | /** | |
229 | * We've already reserved this one. | |
230 | */ | |
231 | if (unlikely(sequence == bo->val_seq)) | |
232 | return -EDEADLK; | |
233 | /** | |
234 | * Already reserved by a thread that will not back | |
235 | * off for us. We need to back off. | |
236 | */ | |
237 | if (unlikely(sequence - bo->val_seq < (1 << 31))) | |
238 | return -EAGAIN; | |
ba4e7d97 TH |
239 | } |
240 | ||
241 | if (no_wait) | |
242 | return -EBUSY; | |
243 | ||
a987fcaa | 244 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 245 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 246 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
247 | |
248 | if (unlikely(ret)) | |
249 | return ret; | |
250 | } | |
251 | ||
252 | if (use_sequence) { | |
95ccb0f3 TH |
253 | /** |
254 | * Wake up waiters that may need to recheck for deadlock, | |
255 | * if we decreased the sequence number. | |
256 | */ | |
257 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
258 | || !bo->seq_valid)) | |
259 | wake_up_all(&bo->event_queue); | |
260 | ||
ba4e7d97 TH |
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 | ||
d6ea8886 DA |
276 | void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
277 | bool never_free) | |
278 | { | |
2357cbe5 TH |
279 | kref_sub(&bo->list_kref, count, |
280 | (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list); | |
d6ea8886 DA |
281 | } |
282 | ||
ba4e7d97 TH |
283 | int ttm_bo_reserve(struct ttm_buffer_object *bo, |
284 | bool interruptible, | |
285 | bool no_wait, bool use_sequence, uint32_t sequence) | |
286 | { | |
a987fcaa | 287 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
288 | int put_count = 0; |
289 | int ret; | |
290 | ||
a987fcaa | 291 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
292 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
293 | sequence); | |
294 | if (likely(ret == 0)) | |
295 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 296 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 297 | |
d6ea8886 | 298 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
299 | |
300 | return ret; | |
301 | } | |
302 | ||
95762c2b TH |
303 | void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo) |
304 | { | |
305 | ttm_bo_add_to_lru(bo); | |
306 | atomic_set(&bo->reserved, 0); | |
307 | wake_up_all(&bo->event_queue); | |
308 | } | |
309 | ||
ba4e7d97 TH |
310 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) |
311 | { | |
a987fcaa | 312 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 313 | |
a987fcaa | 314 | spin_lock(&glob->lru_lock); |
95762c2b | 315 | ttm_bo_unreserve_locked(bo); |
a987fcaa | 316 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
317 | } |
318 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
319 | ||
320 | /* | |
321 | * Call bo->mutex locked. | |
322 | */ | |
ba4e7d97 TH |
323 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
324 | { | |
325 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 326 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
327 | int ret = 0; |
328 | uint32_t page_flags = 0; | |
329 | ||
330 | TTM_ASSERT_LOCKED(&bo->mutex); | |
331 | bo->ttm = NULL; | |
332 | ||
ad49f501 DA |
333 | if (bdev->need_dma32) |
334 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
335 | ||
ba4e7d97 TH |
336 | switch (bo->type) { |
337 | case ttm_bo_type_device: | |
338 | if (zero_alloc) | |
339 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
340 | case ttm_bo_type_kernel: | |
649bf3ca JG |
341 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, |
342 | page_flags, glob->dummy_read_page); | |
ba4e7d97 TH |
343 | if (unlikely(bo->ttm == NULL)) |
344 | ret = -ENOMEM; | |
345 | break; | |
ba4e7d97 TH |
346 | default: |
347 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
348 | ret = -EINVAL; | |
349 | break; | |
350 | } | |
351 | ||
352 | return ret; | |
353 | } | |
354 | ||
355 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
356 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
357 | bool evict, bool interruptible, |
358 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
359 | { |
360 | struct ttm_bo_device *bdev = bo->bdev; | |
361 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
362 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
363 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
364 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
365 | int ret = 0; | |
366 | ||
367 | if (old_is_pci || new_is_pci || | |
eba67093 TH |
368 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { |
369 | ret = ttm_mem_io_lock(old_man, true); | |
370 | if (unlikely(ret != 0)) | |
371 | goto out_err; | |
372 | ttm_bo_unmap_virtual_locked(bo); | |
373 | ttm_mem_io_unlock(old_man); | |
374 | } | |
ba4e7d97 TH |
375 | |
376 | /* | |
377 | * Create and bind a ttm if required. | |
378 | */ | |
379 | ||
8d3bb236 BS |
380 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
381 | if (bo->ttm == NULL) { | |
ff02b13f BS |
382 | bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); |
383 | ret = ttm_bo_add_ttm(bo, zero); | |
8d3bb236 BS |
384 | if (ret) |
385 | goto out_err; | |
386 | } | |
ba4e7d97 TH |
387 | |
388 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
389 | if (ret) | |
87ef9209 | 390 | goto out_err; |
ba4e7d97 TH |
391 | |
392 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
393 | ret = ttm_tt_bind(bo->ttm, mem); | |
394 | if (ret) | |
395 | goto out_err; | |
396 | } | |
397 | ||
398 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
82ef594e BS |
399 | if (bdev->driver->move_notify) |
400 | bdev->driver->move_notify(bo, mem); | |
ca262a99 | 401 | bo->mem = *mem; |
ba4e7d97 | 402 | mem->mm_node = NULL; |
ba4e7d97 TH |
403 | goto moved; |
404 | } | |
ba4e7d97 TH |
405 | } |
406 | ||
9f1feed2 BS |
407 | if (bdev->driver->move_notify) |
408 | bdev->driver->move_notify(bo, mem); | |
409 | ||
ba4e7d97 TH |
410 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
411 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 412 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
413 | else if (bdev->driver->move) |
414 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 415 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 416 | else |
9d87fa21 | 417 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 418 | |
9f1feed2 BS |
419 | if (ret) { |
420 | if (bdev->driver->move_notify) { | |
421 | struct ttm_mem_reg tmp_mem = *mem; | |
422 | *mem = bo->mem; | |
423 | bo->mem = tmp_mem; | |
424 | bdev->driver->move_notify(bo, mem); | |
425 | bo->mem = *mem; | |
426 | } | |
ba4e7d97 | 427 | |
9f1feed2 BS |
428 | goto out_err; |
429 | } | |
dc97b340 | 430 | |
ba4e7d97 TH |
431 | moved: |
432 | if (bo->evicted) { | |
433 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
434 | if (ret) | |
435 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
436 | bo->evicted = false; | |
437 | } | |
438 | ||
439 | if (bo->mem.mm_node) { | |
d961db75 | 440 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
441 | bdev->man[bo->mem.mem_type].gpu_offset; |
442 | bo->cur_placement = bo->mem.placement; | |
354fb52c TH |
443 | } else |
444 | bo->offset = 0; | |
ba4e7d97 TH |
445 | |
446 | return 0; | |
447 | ||
448 | out_err: | |
449 | new_man = &bdev->man[bo->mem.mem_type]; | |
450 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
451 | ttm_tt_unbind(bo->ttm); | |
452 | ttm_tt_destroy(bo->ttm); | |
453 | bo->ttm = NULL; | |
454 | } | |
455 | ||
456 | return ret; | |
457 | } | |
458 | ||
1df6a2eb | 459 | /** |
40d857bb | 460 | * Call bo::reserved. |
1df6a2eb | 461 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
462 | * This is the place to put in driver specific hooks to release |
463 | * driver private resources. | |
464 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
465 | */ |
466 | ||
467 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
468 | { | |
dc97b340 JG |
469 | if (bo->bdev->driver->move_notify) |
470 | bo->bdev->driver->move_notify(bo, NULL); | |
471 | ||
1df6a2eb | 472 | if (bo->ttm) { |
1df6a2eb TH |
473 | ttm_tt_unbind(bo->ttm); |
474 | ttm_tt_destroy(bo->ttm); | |
475 | bo->ttm = NULL; | |
1df6a2eb | 476 | } |
40d857bb | 477 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
478 | |
479 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
480 | |
481 | /* | |
482 | * Make processes trying to reserve really pick it up. | |
483 | */ | |
484 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 485 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
486 | } |
487 | ||
e1efc9b6 | 488 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
489 | { |
490 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 491 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 492 | struct ttm_bo_driver *driver; |
aa123268 | 493 | void *sync_obj = NULL; |
e1efc9b6 TH |
494 | void *sync_obj_arg; |
495 | int put_count; | |
ba4e7d97 TH |
496 | int ret; |
497 | ||
702adba2 | 498 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 499 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 500 | if (!bo->sync_obj) { |
ba4e7d97 | 501 | |
a987fcaa | 502 | spin_lock(&glob->lru_lock); |
aaa20736 | 503 | |
1df6a2eb | 504 | /** |
702adba2 | 505 | * Lock inversion between bo:reserve and bdev::fence_lock here, |
e1efc9b6 | 506 | * but that's OK, since we're only trylocking. |
1df6a2eb TH |
507 | */ |
508 | ||
e1efc9b6 | 509 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 510 | |
e1efc9b6 TH |
511 | if (unlikely(ret == -EBUSY)) |
512 | goto queue; | |
1df6a2eb | 513 | |
702adba2 | 514 | spin_unlock(&bdev->fence_lock); |
1df6a2eb | 515 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 516 | |
40d857bb | 517 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 518 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 519 | |
d6ea8886 | 520 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 521 | |
e1efc9b6 TH |
522 | return; |
523 | } else { | |
524 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 525 | } |
e1efc9b6 | 526 | queue: |
e1efc9b6 | 527 | driver = bdev->driver; |
aa123268 TH |
528 | if (bo->sync_obj) |
529 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
530 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
531 | |
532 | kref_get(&bo->list_kref); | |
533 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
534 | spin_unlock(&glob->lru_lock); | |
702adba2 | 535 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 | 536 | |
aa123268 | 537 | if (sync_obj) { |
e1efc9b6 | 538 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
539 | driver->sync_obj_unref(&sync_obj); |
540 | } | |
e1efc9b6 TH |
541 | schedule_delayed_work(&bdev->wq, |
542 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
543 | } | |
544 | ||
545 | /** | |
546 | * function ttm_bo_cleanup_refs | |
547 | * If bo idle, remove from delayed- and lru lists, and unref. | |
548 | * If not idle, do nothing. | |
549 | * | |
550 | * @interruptible Any sleeps should occur interruptibly. | |
551 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
552 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
553 | */ | |
554 | ||
555 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
556 | bool interruptible, | |
557 | bool no_wait_reserve, | |
558 | bool no_wait_gpu) | |
559 | { | |
702adba2 | 560 | struct ttm_bo_device *bdev = bo->bdev; |
e1efc9b6 TH |
561 | struct ttm_bo_global *glob = bo->glob; |
562 | int put_count; | |
563 | int ret = 0; | |
564 | ||
565 | retry: | |
702adba2 | 566 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 567 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 568 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 TH |
569 | |
570 | if (unlikely(ret != 0)) | |
571 | return ret; | |
572 | ||
a987fcaa | 573 | spin_lock(&glob->lru_lock); |
26cc40a8 TH |
574 | |
575 | if (unlikely(list_empty(&bo->ddestroy))) { | |
576 | spin_unlock(&glob->lru_lock); | |
577 | return 0; | |
578 | } | |
579 | ||
e1efc9b6 TH |
580 | ret = ttm_bo_reserve_locked(bo, interruptible, |
581 | no_wait_reserve, false, 0); | |
ba4e7d97 | 582 | |
26cc40a8 | 583 | if (unlikely(ret != 0)) { |
a987fcaa | 584 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
585 | return ret; |
586 | } | |
ba4e7d97 | 587 | |
e1efc9b6 TH |
588 | /** |
589 | * We can re-check for sync object without taking | |
590 | * the bo::lock since setting the sync object requires | |
591 | * also bo::reserved. A busy object at this point may | |
592 | * be caused by another thread recently starting an accelerated | |
593 | * eviction. | |
594 | */ | |
ba4e7d97 | 595 | |
e1efc9b6 TH |
596 | if (unlikely(bo->sync_obj)) { |
597 | atomic_set(&bo->reserved, 0); | |
598 | wake_up_all(&bo->event_queue); | |
a987fcaa | 599 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 600 | goto retry; |
ba4e7d97 TH |
601 | } |
602 | ||
e1efc9b6 TH |
603 | put_count = ttm_bo_del_from_lru(bo); |
604 | list_del_init(&bo->ddestroy); | |
605 | ++put_count; | |
606 | ||
607 | spin_unlock(&glob->lru_lock); | |
608 | ttm_bo_cleanup_memtype_use(bo); | |
609 | ||
d6ea8886 | 610 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
611 | |
612 | return 0; | |
ba4e7d97 TH |
613 | } |
614 | ||
615 | /** | |
616 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
617 | * encountered buffers. | |
618 | */ | |
619 | ||
620 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
621 | { | |
a987fcaa | 622 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
623 | struct ttm_buffer_object *entry = NULL; |
624 | int ret = 0; | |
ba4e7d97 | 625 | |
a987fcaa | 626 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
627 | if (list_empty(&bdev->ddestroy)) |
628 | goto out_unlock; | |
629 | ||
630 | entry = list_first_entry(&bdev->ddestroy, | |
631 | struct ttm_buffer_object, ddestroy); | |
632 | kref_get(&entry->list_kref); | |
633 | ||
634 | for (;;) { | |
635 | struct ttm_buffer_object *nentry = NULL; | |
636 | ||
637 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
638 | nentry = list_first_entry(&entry->ddestroy, | |
639 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
640 | kref_get(&nentry->list_kref); |
641 | } | |
ba4e7d97 | 642 | |
a987fcaa | 643 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
644 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
645 | !remove_all); | |
ba4e7d97 | 646 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
647 | entry = nentry; |
648 | ||
649 | if (ret || !entry) | |
650 | goto out; | |
ba4e7d97 | 651 | |
a987fcaa | 652 | spin_lock(&glob->lru_lock); |
1a961ce0 | 653 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
654 | break; |
655 | } | |
ba4e7d97 | 656 | |
1a961ce0 LB |
657 | out_unlock: |
658 | spin_unlock(&glob->lru_lock); | |
659 | out: | |
660 | if (entry) | |
661 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
662 | return ret; |
663 | } | |
664 | ||
665 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
666 | { | |
667 | struct ttm_bo_device *bdev = | |
668 | container_of(work, struct ttm_bo_device, wq.work); | |
669 | ||
670 | if (ttm_bo_delayed_delete(bdev, false)) { | |
671 | schedule_delayed_work(&bdev->wq, | |
672 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
673 | } | |
674 | } | |
675 | ||
676 | static void ttm_bo_release(struct kref *kref) | |
677 | { | |
678 | struct ttm_buffer_object *bo = | |
679 | container_of(kref, struct ttm_buffer_object, kref); | |
680 | struct ttm_bo_device *bdev = bo->bdev; | |
eba67093 | 681 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
ba4e7d97 TH |
682 | |
683 | if (likely(bo->vm_node != NULL)) { | |
684 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
685 | drm_mm_put_block(bo->vm_node); | |
686 | bo->vm_node = NULL; | |
687 | } | |
688 | write_unlock(&bdev->vm_lock); | |
eba67093 TH |
689 | ttm_mem_io_lock(man, false); |
690 | ttm_mem_io_free_vm(bo); | |
691 | ttm_mem_io_unlock(man); | |
e1efc9b6 | 692 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
693 | kref_put(&bo->list_kref, ttm_bo_release_list); |
694 | write_lock(&bdev->vm_lock); | |
695 | } | |
696 | ||
697 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
698 | { | |
699 | struct ttm_buffer_object *bo = *p_bo; | |
700 | struct ttm_bo_device *bdev = bo->bdev; | |
701 | ||
702 | *p_bo = NULL; | |
703 | write_lock(&bdev->vm_lock); | |
704 | kref_put(&bo->kref, ttm_bo_release); | |
705 | write_unlock(&bdev->vm_lock); | |
706 | } | |
707 | EXPORT_SYMBOL(ttm_bo_unref); | |
708 | ||
7c5ee536 MG |
709 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
710 | { | |
711 | return cancel_delayed_work_sync(&bdev->wq); | |
712 | } | |
713 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
714 | ||
715 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
716 | { | |
717 | if (resched) | |
718 | schedule_delayed_work(&bdev->wq, | |
719 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
720 | } | |
721 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
722 | ||
ca262a99 | 723 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 724 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 725 | { |
ba4e7d97 TH |
726 | struct ttm_bo_device *bdev = bo->bdev; |
727 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
728 | struct ttm_placement placement; |
729 | int ret = 0; | |
ba4e7d97 | 730 | |
702adba2 | 731 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 732 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 733 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 734 | |
78ecf091 | 735 | if (unlikely(ret != 0)) { |
98ffc415 | 736 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
737 | printk(KERN_ERR TTM_PFX |
738 | "Failed to expire sync object before " | |
739 | "buffer eviction.\n"); | |
740 | } | |
ba4e7d97 TH |
741 | goto out; |
742 | } | |
743 | ||
744 | BUG_ON(!atomic_read(&bo->reserved)); | |
745 | ||
746 | evict_mem = bo->mem; | |
747 | evict_mem.mm_node = NULL; | |
eba67093 TH |
748 | evict_mem.bus.io_reserved_vm = false; |
749 | evict_mem.bus.io_reserved_count = 0; | |
ba4e7d97 | 750 | |
7cb7d1d7 JG |
751 | placement.fpfn = 0; |
752 | placement.lpfn = 0; | |
753 | placement.num_placement = 0; | |
754 | placement.num_busy_placement = 0; | |
ca262a99 JG |
755 | bdev->driver->evict_flags(bo, &placement); |
756 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 757 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 758 | if (ret) { |
fb53f862 | 759 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
760 | printk(KERN_ERR TTM_PFX |
761 | "Failed to find memory space for " | |
762 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
763 | ttm_bo_mem_space_debug(bo, &placement); |
764 | } | |
ba4e7d97 TH |
765 | goto out; |
766 | } | |
767 | ||
768 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 769 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 770 | if (ret) { |
98ffc415 | 771 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 772 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 773 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
774 | goto out; |
775 | } | |
ca262a99 JG |
776 | bo->evicted = true; |
777 | out: | |
778 | return ret; | |
779 | } | |
780 | ||
781 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
782 | uint32_t mem_type, | |
9d87fa21 JG |
783 | bool interruptible, bool no_wait_reserve, |
784 | bool no_wait_gpu) | |
ca262a99 JG |
785 | { |
786 | struct ttm_bo_global *glob = bdev->glob; | |
787 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
788 | struct ttm_buffer_object *bo; | |
789 | int ret, put_count = 0; | |
ba4e7d97 | 790 | |
9c51ba1d | 791 | retry: |
a987fcaa | 792 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
793 | if (list_empty(&man->lru)) { |
794 | spin_unlock(&glob->lru_lock); | |
795 | return -EBUSY; | |
796 | } | |
797 | ||
ca262a99 JG |
798 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
799 | kref_get(&bo->list_kref); | |
9c51ba1d | 800 | |
e1efc9b6 TH |
801 | if (!list_empty(&bo->ddestroy)) { |
802 | spin_unlock(&glob->lru_lock); | |
803 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
804 | no_wait_reserve, no_wait_gpu); | |
805 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
806 | ||
807 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
808 | return ret; | |
809 | ||
810 | goto retry; | |
811 | } | |
812 | ||
9d87fa21 | 813 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
814 | |
815 | if (unlikely(ret == -EBUSY)) { | |
816 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 817 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
818 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
819 | ||
820 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
821 | ||
822 | /** | |
823 | * We *need* to retry after releasing the lru lock. | |
824 | */ | |
825 | ||
826 | if (unlikely(ret != 0)) | |
827 | return ret; | |
828 | goto retry; | |
829 | } | |
830 | ||
831 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 832 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
833 | |
834 | BUG_ON(ret != 0); | |
835 | ||
d6ea8886 | 836 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 837 | |
9d87fa21 | 838 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 839 | ttm_bo_unreserve(bo); |
9c51ba1d | 840 | |
ca262a99 | 841 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
842 | return ret; |
843 | } | |
844 | ||
42311ff9 BS |
845 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
846 | { | |
d961db75 | 847 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 848 | |
d961db75 BS |
849 | if (mem->mm_node) |
850 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
851 | } |
852 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
853 | ||
ba4e7d97 TH |
854 | /** |
855 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
856 | * space, or we've evicted everything and there isn't enough space. | |
857 | */ | |
ca262a99 JG |
858 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
859 | uint32_t mem_type, | |
860 | struct ttm_placement *placement, | |
861 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
862 | bool interruptible, |
863 | bool no_wait_reserve, | |
864 | bool no_wait_gpu) | |
ba4e7d97 | 865 | { |
ca262a99 | 866 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 867 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
868 | int ret; |
869 | ||
ba4e7d97 | 870 | do { |
d961db75 | 871 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
872 | if (unlikely(ret != 0)) |
873 | return ret; | |
d961db75 | 874 | if (mem->mm_node) |
ba4e7d97 | 875 | break; |
ca262a99 | 876 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 877 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
878 | if (unlikely(ret != 0)) |
879 | return ret; | |
ba4e7d97 | 880 | } while (1); |
d961db75 | 881 | if (mem->mm_node == NULL) |
ba4e7d97 | 882 | return -ENOMEM; |
ba4e7d97 TH |
883 | mem->mem_type = mem_type; |
884 | return 0; | |
885 | } | |
886 | ||
ae3e8122 TH |
887 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
888 | uint32_t cur_placement, | |
889 | uint32_t proposed_placement) | |
890 | { | |
891 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
892 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
893 | ||
894 | /** | |
895 | * Keep current caching if possible. | |
896 | */ | |
897 | ||
898 | if ((cur_placement & caching) != 0) | |
899 | result |= (cur_placement & caching); | |
900 | else if ((man->default_caching & caching) != 0) | |
901 | result |= man->default_caching; | |
902 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
903 | result |= TTM_PL_FLAG_CACHED; | |
904 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
905 | result |= TTM_PL_FLAG_WC; | |
906 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
907 | result |= TTM_PL_FLAG_UNCACHED; | |
908 | ||
909 | return result; | |
910 | } | |
911 | ||
ba4e7d97 | 912 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
ba4e7d97 | 913 | uint32_t mem_type, |
ae3e8122 TH |
914 | uint32_t proposed_placement, |
915 | uint32_t *masked_placement) | |
ba4e7d97 TH |
916 | { |
917 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
918 | ||
ae3e8122 | 919 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
920 | return false; |
921 | ||
ae3e8122 | 922 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 923 | return false; |
ba4e7d97 | 924 | |
ae3e8122 TH |
925 | cur_flags |= (proposed_placement & man->available_caching); |
926 | ||
927 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
928 | return true; |
929 | } | |
930 | ||
931 | /** | |
932 | * Creates space for memory region @mem according to its type. | |
933 | * | |
934 | * This function first searches for free space in compatible memory types in | |
935 | * the priority order defined by the driver. If free space isn't found, then | |
936 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
937 | * space. | |
938 | */ | |
939 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
940 | struct ttm_placement *placement, |
941 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
942 | bool interruptible, bool no_wait_reserve, |
943 | bool no_wait_gpu) | |
ba4e7d97 TH |
944 | { |
945 | struct ttm_bo_device *bdev = bo->bdev; | |
946 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
947 | uint32_t mem_type = TTM_PL_SYSTEM; |
948 | uint32_t cur_flags = 0; | |
949 | bool type_found = false; | |
950 | bool type_ok = false; | |
98ffc415 | 951 | bool has_erestartsys = false; |
ca262a99 | 952 | int i, ret; |
ba4e7d97 TH |
953 | |
954 | mem->mm_node = NULL; | |
b6637526 | 955 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
956 | ret = ttm_mem_type_from_flags(placement->placement[i], |
957 | &mem_type); | |
958 | if (ret) | |
959 | return ret; | |
ba4e7d97 TH |
960 | man = &bdev->man[mem_type]; |
961 | ||
962 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
963 | mem_type, |
964 | placement->placement[i], | |
965 | &cur_flags); | |
ba4e7d97 TH |
966 | |
967 | if (!type_ok) | |
968 | continue; | |
969 | ||
ae3e8122 TH |
970 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
971 | cur_flags); | |
ca262a99 JG |
972 | /* |
973 | * Use the access and other non-mapping-related flag bits from | |
974 | * the memory placement flags to the current flags | |
975 | */ | |
976 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
977 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 978 | |
ba4e7d97 TH |
979 | if (mem_type == TTM_PL_SYSTEM) |
980 | break; | |
981 | ||
982 | if (man->has_type && man->use_type) { | |
983 | type_found = true; | |
d961db75 | 984 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
985 | if (unlikely(ret)) |
986 | return ret; | |
ba4e7d97 | 987 | } |
d961db75 | 988 | if (mem->mm_node) |
ba4e7d97 TH |
989 | break; |
990 | } | |
991 | ||
d961db75 | 992 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
993 | mem->mem_type = mem_type; |
994 | mem->placement = cur_flags; | |
995 | return 0; | |
996 | } | |
997 | ||
998 | if (!type_found) | |
999 | return -EINVAL; | |
1000 | ||
b6637526 DA |
1001 | for (i = 0; i < placement->num_busy_placement; ++i) { |
1002 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
1003 | &mem_type); |
1004 | if (ret) | |
1005 | return ret; | |
ba4e7d97 | 1006 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1007 | if (!man->has_type) |
1008 | continue; | |
ba4e7d97 | 1009 | if (!ttm_bo_mt_compatible(man, |
ca262a99 | 1010 | mem_type, |
b6637526 | 1011 | placement->busy_placement[i], |
ca262a99 | 1012 | &cur_flags)) |
ba4e7d97 TH |
1013 | continue; |
1014 | ||
ae3e8122 TH |
1015 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1016 | cur_flags); | |
ca262a99 JG |
1017 | /* |
1018 | * Use the access and other non-mapping-related flag bits from | |
1019 | * the memory placement flags to the current flags | |
1020 | */ | |
b6637526 | 1021 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 1022 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1023 | |
0eaddb28 TH |
1024 | |
1025 | if (mem_type == TTM_PL_SYSTEM) { | |
1026 | mem->mem_type = mem_type; | |
1027 | mem->placement = cur_flags; | |
1028 | mem->mm_node = NULL; | |
1029 | return 0; | |
1030 | } | |
1031 | ||
ca262a99 | 1032 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1033 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1034 | if (ret == 0 && mem->mm_node) { |
1035 | mem->placement = cur_flags; | |
1036 | return 0; | |
1037 | } | |
98ffc415 TH |
1038 | if (ret == -ERESTARTSYS) |
1039 | has_erestartsys = true; | |
ba4e7d97 | 1040 | } |
98ffc415 | 1041 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1042 | return ret; |
1043 | } | |
1044 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1045 | ||
1046 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1047 | { | |
ba4e7d97 TH |
1048 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1049 | return -EBUSY; | |
1050 | ||
98ffc415 TH |
1051 | return wait_event_interruptible(bo->event_queue, |
1052 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1053 | } |
d1ede145 | 1054 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1055 | |
1056 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1057 | struct ttm_placement *placement, |
9d87fa21 JG |
1058 | bool interruptible, bool no_wait_reserve, |
1059 | bool no_wait_gpu) | |
ba4e7d97 | 1060 | { |
ba4e7d97 TH |
1061 | int ret = 0; |
1062 | struct ttm_mem_reg mem; | |
702adba2 | 1063 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1064 | |
1065 | BUG_ON(!atomic_read(&bo->reserved)); | |
1066 | ||
1067 | /* | |
1068 | * FIXME: It's possible to pipeline buffer moves. | |
1069 | * Have the driver move function wait for idle when necessary, | |
1070 | * instead of doing it here. | |
1071 | */ | |
702adba2 | 1072 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1073 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 1074 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1075 | if (ret) |
1076 | return ret; | |
ba4e7d97 TH |
1077 | mem.num_pages = bo->num_pages; |
1078 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1079 | mem.page_alignment = bo->mem.page_alignment; | |
eba67093 TH |
1080 | mem.bus.io_reserved_vm = false; |
1081 | mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1082 | /* |
1083 | * Determine where to move the buffer. | |
1084 | */ | |
9d87fa21 | 1085 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1086 | if (ret) |
1087 | goto out_unlock; | |
9d87fa21 | 1088 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1089 | out_unlock: |
d961db75 BS |
1090 | if (ret && mem.mm_node) |
1091 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1092 | return ret; |
1093 | } | |
1094 | ||
ca262a99 | 1095 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1096 | struct ttm_mem_reg *mem) |
1097 | { | |
ca262a99 | 1098 | int i; |
e22238ea | 1099 | |
d961db75 BS |
1100 | if (mem->mm_node && placement->lpfn != 0 && |
1101 | (mem->start < placement->fpfn || | |
1102 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1103 | return -1; |
ca262a99 JG |
1104 | |
1105 | for (i = 0; i < placement->num_placement; i++) { | |
1106 | if ((placement->placement[i] & mem->placement & | |
1107 | TTM_PL_MASK_CACHING) && | |
1108 | (placement->placement[i] & mem->placement & | |
1109 | TTM_PL_MASK_MEM)) | |
1110 | return i; | |
1111 | } | |
1112 | return -1; | |
ba4e7d97 TH |
1113 | } |
1114 | ||
09855acb JG |
1115 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1116 | struct ttm_placement *placement, | |
9d87fa21 JG |
1117 | bool interruptible, bool no_wait_reserve, |
1118 | bool no_wait_gpu) | |
ba4e7d97 TH |
1119 | { |
1120 | int ret; | |
1121 | ||
1122 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1123 | /* Check that range is valid */ |
1124 | if (placement->lpfn || placement->fpfn) | |
1125 | if (placement->fpfn > placement->lpfn || | |
1126 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1127 | return -EINVAL; | |
ba4e7d97 TH |
1128 | /* |
1129 | * Check whether we need to move buffer. | |
1130 | */ | |
ca262a99 JG |
1131 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1132 | if (ret < 0) { | |
9d87fa21 | 1133 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1134 | if (ret) |
ba4e7d97 | 1135 | return ret; |
ca262a99 JG |
1136 | } else { |
1137 | /* | |
1138 | * Use the access and other non-mapping-related flag bits from | |
1139 | * the compatible memory placement flags to the active flags | |
1140 | */ | |
1141 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1142 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1143 | } |
ba4e7d97 TH |
1144 | /* |
1145 | * We might need to add a TTM. | |
1146 | */ | |
ba4e7d97 TH |
1147 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1148 | ret = ttm_bo_add_ttm(bo, true); | |
1149 | if (ret) | |
1150 | return ret; | |
1151 | } | |
ba4e7d97 TH |
1152 | return 0; |
1153 | } | |
09855acb | 1154 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1155 | |
09855acb JG |
1156 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1157 | struct ttm_placement *placement) | |
ba4e7d97 | 1158 | { |
29e190e0 TH |
1159 | BUG_ON((placement->fpfn || placement->lpfn) && |
1160 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1161 | |
ba4e7d97 TH |
1162 | return 0; |
1163 | } | |
1164 | ||
09855acb JG |
1165 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1166 | struct ttm_buffer_object *bo, | |
1167 | unsigned long size, | |
1168 | enum ttm_bo_type type, | |
1169 | struct ttm_placement *placement, | |
1170 | uint32_t page_alignment, | |
1171 | unsigned long buffer_start, | |
1172 | bool interruptible, | |
5df23979 | 1173 | struct file *persistent_swap_storage, |
09855acb JG |
1174 | size_t acc_size, |
1175 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1176 | { |
09855acb | 1177 | int ret = 0; |
ba4e7d97 | 1178 | unsigned long num_pages; |
57de4ba9 JG |
1179 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
1180 | ||
1181 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); | |
1182 | if (ret) { | |
1183 | printk(KERN_ERR TTM_PFX "Out of kernel memory.\n"); | |
1184 | if (destroy) | |
1185 | (*destroy)(bo); | |
1186 | else | |
1187 | kfree(bo); | |
1188 | return -ENOMEM; | |
1189 | } | |
ba4e7d97 TH |
1190 | |
1191 | size += buffer_start & ~PAGE_MASK; | |
1192 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1193 | if (num_pages == 0) { | |
1194 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
7dfbbdcf TH |
1195 | if (destroy) |
1196 | (*destroy)(bo); | |
1197 | else | |
1198 | kfree(bo); | |
ba4e7d97 TH |
1199 | return -EINVAL; |
1200 | } | |
1201 | bo->destroy = destroy; | |
1202 | ||
ba4e7d97 TH |
1203 | kref_init(&bo->kref); |
1204 | kref_init(&bo->list_kref); | |
1205 | atomic_set(&bo->cpu_writers, 0); | |
1206 | atomic_set(&bo->reserved, 1); | |
1207 | init_waitqueue_head(&bo->event_queue); | |
1208 | INIT_LIST_HEAD(&bo->lru); | |
1209 | INIT_LIST_HEAD(&bo->ddestroy); | |
1210 | INIT_LIST_HEAD(&bo->swap); | |
eba67093 | 1211 | INIT_LIST_HEAD(&bo->io_reserve_lru); |
ba4e7d97 | 1212 | bo->bdev = bdev; |
a987fcaa | 1213 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1214 | bo->type = type; |
1215 | bo->num_pages = num_pages; | |
eb6d2c39 | 1216 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1217 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1218 | bo->mem.num_pages = bo->num_pages; | |
1219 | bo->mem.mm_node = NULL; | |
1220 | bo->mem.page_alignment = page_alignment; | |
eba67093 TH |
1221 | bo->mem.bus.io_reserved_vm = false; |
1222 | bo->mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1223 | bo->buffer_start = buffer_start & PAGE_MASK; |
1224 | bo->priv_flags = 0; | |
1225 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1226 | bo->seq_valid = false; | |
5df23979 | 1227 | bo->persistent_swap_storage = persistent_swap_storage; |
ba4e7d97 | 1228 | bo->acc_size = acc_size; |
a987fcaa | 1229 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1230 | |
09855acb | 1231 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1232 | if (unlikely(ret != 0)) |
1233 | goto out_err; | |
1234 | ||
ba4e7d97 TH |
1235 | /* |
1236 | * For ttm_bo_type_device buffers, allocate | |
1237 | * address space from the device. | |
1238 | */ | |
ba4e7d97 TH |
1239 | if (bo->type == ttm_bo_type_device) { |
1240 | ret = ttm_bo_setup_vm(bo); | |
1241 | if (ret) | |
1242 | goto out_err; | |
1243 | } | |
1244 | ||
9d87fa21 | 1245 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1246 | if (ret) |
1247 | goto out_err; | |
1248 | ||
1249 | ttm_bo_unreserve(bo); | |
1250 | return 0; | |
1251 | ||
1252 | out_err: | |
1253 | ttm_bo_unreserve(bo); | |
1254 | ttm_bo_unref(&bo); | |
1255 | ||
1256 | return ret; | |
1257 | } | |
09855acb | 1258 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1259 | |
57de4ba9 JG |
1260 | size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, |
1261 | unsigned long bo_size, | |
1262 | unsigned struct_size) | |
ba4e7d97 | 1263 | { |
57de4ba9 JG |
1264 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
1265 | size_t size = 0; | |
ba4e7d97 | 1266 | |
57de4ba9 JG |
1267 | size += ttm_round_pot(struct_size); |
1268 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1269 | size += ttm_round_pot(sizeof(struct ttm_tt)); | |
1270 | return size; | |
ba4e7d97 | 1271 | } |
57de4ba9 JG |
1272 | EXPORT_SYMBOL(ttm_bo_acc_size); |
1273 | ||
1274 | size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, | |
1275 | unsigned long bo_size, | |
1276 | unsigned struct_size) | |
1277 | { | |
1278 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; | |
1279 | size_t size = 0; | |
1280 | ||
1281 | size += ttm_round_pot(struct_size); | |
1282 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1283 | size += PAGE_ALIGN(npages * sizeof(dma_addr_t)); | |
1284 | size += ttm_round_pot(sizeof(struct ttm_dma_tt)); | |
1285 | return size; | |
1286 | } | |
1287 | EXPORT_SYMBOL(ttm_bo_dma_acc_size); | |
ba4e7d97 | 1288 | |
09855acb JG |
1289 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1290 | unsigned long size, | |
1291 | enum ttm_bo_type type, | |
1292 | struct ttm_placement *placement, | |
1293 | uint32_t page_alignment, | |
1294 | unsigned long buffer_start, | |
1295 | bool interruptible, | |
5df23979 | 1296 | struct file *persistent_swap_storage, |
09855acb | 1297 | struct ttm_buffer_object **p_bo) |
ba4e7d97 TH |
1298 | { |
1299 | struct ttm_buffer_object *bo; | |
a987fcaa | 1300 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
57de4ba9 | 1301 | size_t acc_size; |
ca262a99 | 1302 | int ret; |
ba4e7d97 | 1303 | |
57de4ba9 | 1304 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); |
5fd9cbad | 1305 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1306 | if (unlikely(ret != 0)) |
1307 | return ret; | |
1308 | ||
1309 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1310 | ||
1311 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1312 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1313 | return -ENOMEM; |
1314 | } | |
1315 | ||
09855acb JG |
1316 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1317 | buffer_start, interruptible, | |
5df23979 | 1318 | persistent_swap_storage, acc_size, NULL); |
ba4e7d97 TH |
1319 | if (likely(ret == 0)) |
1320 | *p_bo = bo; | |
1321 | ||
1322 | return ret; | |
1323 | } | |
4d798937 | 1324 | EXPORT_SYMBOL(ttm_bo_create); |
ba4e7d97 | 1325 | |
ba4e7d97 | 1326 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1327 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1328 | { |
ca262a99 | 1329 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1330 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1331 | int ret; |
ba4e7d97 TH |
1332 | |
1333 | /* | |
1334 | * Can't use standard list traversal since we're unlocking. | |
1335 | */ | |
1336 | ||
a987fcaa | 1337 | spin_lock(&glob->lru_lock); |
ca262a99 | 1338 | while (!list_empty(&man->lru)) { |
a987fcaa | 1339 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1340 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1341 | if (ret) { |
1342 | if (allow_errors) { | |
1343 | return ret; | |
1344 | } else { | |
1345 | printk(KERN_ERR TTM_PFX | |
1346 | "Cleanup eviction failed\n"); | |
1347 | } | |
1348 | } | |
a987fcaa | 1349 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1350 | } |
a987fcaa | 1351 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1352 | return 0; |
1353 | } | |
1354 | ||
1355 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1356 | { | |
c96e7c7a | 1357 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1358 | int ret = -EINVAL; |
1359 | ||
1360 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1361 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1362 | return ret; | |
1363 | } | |
c96e7c7a | 1364 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1365 | |
1366 | if (!man->has_type) { | |
1367 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1368 | "memory manager type %u\n", mem_type); | |
1369 | return ret; | |
1370 | } | |
1371 | ||
1372 | man->use_type = false; | |
1373 | man->has_type = false; | |
1374 | ||
1375 | ret = 0; | |
1376 | if (mem_type > 0) { | |
ca262a99 | 1377 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1378 | |
d961db75 | 1379 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1380 | } |
1381 | ||
1382 | return ret; | |
1383 | } | |
1384 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1385 | ||
1386 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1387 | { | |
1388 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1389 | ||
1390 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1391 | printk(KERN_ERR TTM_PFX | |
1392 | "Illegal memory manager memory type %u.\n", | |
1393 | mem_type); | |
1394 | return -EINVAL; | |
1395 | } | |
1396 | ||
1397 | if (!man->has_type) { | |
1398 | printk(KERN_ERR TTM_PFX | |
1399 | "Memory type %u has not been initialized.\n", | |
1400 | mem_type); | |
1401 | return 0; | |
1402 | } | |
1403 | ||
ca262a99 | 1404 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1405 | } |
1406 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1407 | ||
1408 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1409 | unsigned long p_size) |
ba4e7d97 TH |
1410 | { |
1411 | int ret = -EINVAL; | |
1412 | struct ttm_mem_type_manager *man; | |
1413 | ||
dbc4a5b8 | 1414 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1415 | man = &bdev->man[type]; |
dbc4a5b8 | 1416 | BUG_ON(man->has_type); |
eba67093 TH |
1417 | man->io_reserve_fastpath = true; |
1418 | man->use_io_reserve_lru = false; | |
1419 | mutex_init(&man->io_reserve_mutex); | |
1420 | INIT_LIST_HEAD(&man->io_reserve_lru); | |
ba4e7d97 TH |
1421 | |
1422 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1423 | if (ret) | |
1424 | return ret; | |
d961db75 | 1425 | man->bdev = bdev; |
ba4e7d97 TH |
1426 | |
1427 | ret = 0; | |
1428 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1429 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1430 | if (ret) |
1431 | return ret; | |
1432 | } | |
1433 | man->has_type = true; | |
1434 | man->use_type = true; | |
1435 | man->size = p_size; | |
1436 | ||
1437 | INIT_LIST_HEAD(&man->lru); | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1442 | ||
a987fcaa TH |
1443 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1444 | { | |
1445 | struct ttm_bo_global *glob = | |
1446 | container_of(kobj, struct ttm_bo_global, kobj); | |
1447 | ||
a987fcaa TH |
1448 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1449 | __free_page(glob->dummy_read_page); | |
1450 | kfree(glob); | |
1451 | } | |
1452 | ||
ba4420c2 | 1453 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1454 | { |
1455 | struct ttm_bo_global *glob = ref->object; | |
1456 | ||
1457 | kobject_del(&glob->kobj); | |
1458 | kobject_put(&glob->kobj); | |
1459 | } | |
1460 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1461 | ||
ba4420c2 | 1462 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1463 | { |
1464 | struct ttm_bo_global_ref *bo_ref = | |
1465 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1466 | struct ttm_bo_global *glob = ref->object; | |
1467 | int ret; | |
1468 | ||
1469 | mutex_init(&glob->device_list_mutex); | |
1470 | spin_lock_init(&glob->lru_lock); | |
1471 | glob->mem_glob = bo_ref->mem_glob; | |
1472 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1473 | ||
1474 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1475 | ret = -ENOMEM; | |
1476 | goto out_no_drp; | |
1477 | } | |
1478 | ||
1479 | INIT_LIST_HEAD(&glob->swap_lru); | |
1480 | INIT_LIST_HEAD(&glob->device_list); | |
1481 | ||
1482 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1483 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1484 | if (unlikely(ret != 0)) { | |
1485 | printk(KERN_ERR TTM_PFX | |
1486 | "Could not register buffer object swapout.\n"); | |
1487 | goto out_no_shrink; | |
1488 | } | |
1489 | ||
a987fcaa TH |
1490 | atomic_set(&glob->bo_count, 0); |
1491 | ||
b642ed06 RD |
1492 | ret = kobject_init_and_add( |
1493 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1494 | if (unlikely(ret != 0)) |
1495 | kobject_put(&glob->kobj); | |
1496 | return ret; | |
1497 | out_no_shrink: | |
1498 | __free_page(glob->dummy_read_page); | |
1499 | out_no_drp: | |
1500 | kfree(glob); | |
1501 | return ret; | |
1502 | } | |
1503 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1504 | ||
1505 | ||
ba4e7d97 TH |
1506 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1507 | { | |
1508 | int ret = 0; | |
1509 | unsigned i = TTM_NUM_MEM_TYPES; | |
1510 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1511 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1512 | |
1513 | while (i--) { | |
1514 | man = &bdev->man[i]; | |
1515 | if (man->has_type) { | |
1516 | man->use_type = false; | |
1517 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1518 | ret = -EBUSY; | |
1519 | printk(KERN_ERR TTM_PFX | |
1520 | "DRM memory manager type %d " | |
1521 | "is not clean.\n", i); | |
1522 | } | |
1523 | man->has_type = false; | |
1524 | } | |
1525 | } | |
1526 | ||
a987fcaa TH |
1527 | mutex_lock(&glob->device_list_mutex); |
1528 | list_del(&bdev->device_list); | |
1529 | mutex_unlock(&glob->device_list_mutex); | |
1530 | ||
f094cfc6 | 1531 | cancel_delayed_work_sync(&bdev->wq); |
ba4e7d97 TH |
1532 | |
1533 | while (ttm_bo_delayed_delete(bdev, true)) | |
1534 | ; | |
1535 | ||
a987fcaa | 1536 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1537 | if (list_empty(&bdev->ddestroy)) |
1538 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1539 | ||
1540 | if (list_empty(&bdev->man[0].lru)) | |
1541 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1542 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1543 | |
ba4e7d97 TH |
1544 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1545 | write_lock(&bdev->vm_lock); | |
1546 | drm_mm_takedown(&bdev->addr_space_mm); | |
1547 | write_unlock(&bdev->vm_lock); | |
1548 | ||
ba4e7d97 TH |
1549 | return ret; |
1550 | } | |
1551 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1552 | ||
ba4e7d97 | 1553 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1554 | struct ttm_bo_global *glob, |
1555 | struct ttm_bo_driver *driver, | |
51c8b407 | 1556 | uint64_t file_page_offset, |
ad49f501 | 1557 | bool need_dma32) |
ba4e7d97 TH |
1558 | { |
1559 | int ret = -EINVAL; | |
1560 | ||
ba4e7d97 | 1561 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1562 | bdev->driver = driver; |
ba4e7d97 TH |
1563 | |
1564 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1565 | ||
ba4e7d97 TH |
1566 | /* |
1567 | * Initialize the system memory buffer type. | |
1568 | * Other types need to be driver / IOCTL initialized. | |
1569 | */ | |
ca262a99 | 1570 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1571 | if (unlikely(ret != 0)) |
a987fcaa | 1572 | goto out_no_sys; |
ba4e7d97 TH |
1573 | |
1574 | bdev->addr_space_rb = RB_ROOT; | |
1575 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1576 | if (unlikely(ret != 0)) | |
a987fcaa | 1577 | goto out_no_addr_mm; |
ba4e7d97 TH |
1578 | |
1579 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1580 | bdev->nice_mode = true; | |
1581 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1582 | bdev->dev_mapping = NULL; |
a987fcaa | 1583 | bdev->glob = glob; |
ad49f501 | 1584 | bdev->need_dma32 = need_dma32; |
65705962 | 1585 | bdev->val_seq = 0; |
702adba2 | 1586 | spin_lock_init(&bdev->fence_lock); |
a987fcaa TH |
1587 | mutex_lock(&glob->device_list_mutex); |
1588 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1589 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1590 | |
1591 | return 0; | |
a987fcaa | 1592 | out_no_addr_mm: |
ba4e7d97 | 1593 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1594 | out_no_sys: |
ba4e7d97 TH |
1595 | return ret; |
1596 | } | |
1597 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1598 | ||
1599 | /* | |
1600 | * buffer object vm functions. | |
1601 | */ | |
1602 | ||
1603 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1604 | { | |
1605 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1606 | ||
1607 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1608 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1609 | return false; | |
1610 | ||
1611 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1612 | return false; | |
1613 | ||
1614 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1615 | return false; | |
1616 | } | |
1617 | return true; | |
1618 | } | |
1619 | ||
eba67093 | 1620 | void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
1621 | { |
1622 | struct ttm_bo_device *bdev = bo->bdev; | |
1623 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1624 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1625 | ||
1626 | if (!bdev->dev_mapping) | |
1627 | return; | |
ba4e7d97 | 1628 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
eba67093 | 1629 | ttm_mem_io_free_vm(bo); |
ba4e7d97 | 1630 | } |
eba67093 TH |
1631 | |
1632 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1633 | { | |
1634 | struct ttm_bo_device *bdev = bo->bdev; | |
1635 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; | |
1636 | ||
1637 | ttm_mem_io_lock(man, false); | |
1638 | ttm_bo_unmap_virtual_locked(bo); | |
1639 | ttm_mem_io_unlock(man); | |
ba4e7d97 | 1640 | } |
eba67093 TH |
1641 | |
1642 | ||
e024e110 | 1643 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1644 | |
1645 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1646 | { | |
1647 | struct ttm_bo_device *bdev = bo->bdev; | |
1648 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1649 | struct rb_node *parent = NULL; | |
1650 | struct ttm_buffer_object *cur_bo; | |
1651 | unsigned long offset = bo->vm_node->start; | |
1652 | unsigned long cur_offset; | |
1653 | ||
1654 | while (*cur) { | |
1655 | parent = *cur; | |
1656 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1657 | cur_offset = cur_bo->vm_node->start; | |
1658 | if (offset < cur_offset) | |
1659 | cur = &parent->rb_left; | |
1660 | else if (offset > cur_offset) | |
1661 | cur = &parent->rb_right; | |
1662 | else | |
1663 | BUG(); | |
1664 | } | |
1665 | ||
1666 | rb_link_node(&bo->vm_rb, parent, cur); | |
1667 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1668 | } | |
1669 | ||
1670 | /** | |
1671 | * ttm_bo_setup_vm: | |
1672 | * | |
1673 | * @bo: the buffer to allocate address space for | |
1674 | * | |
1675 | * Allocate address space in the drm device so that applications | |
1676 | * can mmap the buffer and access the contents. This only | |
1677 | * applies to ttm_bo_type_device objects as others are not | |
1678 | * placed in the drm device address space. | |
1679 | */ | |
1680 | ||
1681 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1682 | { | |
1683 | struct ttm_bo_device *bdev = bo->bdev; | |
1684 | int ret; | |
1685 | ||
1686 | retry_pre_get: | |
1687 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1688 | if (unlikely(ret != 0)) | |
1689 | return ret; | |
1690 | ||
1691 | write_lock(&bdev->vm_lock); | |
1692 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1693 | bo->mem.num_pages, 0, 0); | |
1694 | ||
1695 | if (unlikely(bo->vm_node == NULL)) { | |
1696 | ret = -ENOMEM; | |
1697 | goto out_unlock; | |
1698 | } | |
1699 | ||
1700 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1701 | bo->mem.num_pages, 0); | |
1702 | ||
1703 | if (unlikely(bo->vm_node == NULL)) { | |
1704 | write_unlock(&bdev->vm_lock); | |
1705 | goto retry_pre_get; | |
1706 | } | |
1707 | ||
1708 | ttm_bo_vm_insert_rb(bo); | |
1709 | write_unlock(&bdev->vm_lock); | |
1710 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1711 | ||
1712 | return 0; | |
1713 | out_unlock: | |
1714 | write_unlock(&bdev->vm_lock); | |
1715 | return ret; | |
1716 | } | |
1717 | ||
1718 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1717c0e2 | 1719 | bool lazy, bool interruptible, bool no_wait) |
ba4e7d97 TH |
1720 | { |
1721 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
702adba2 | 1722 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1723 | void *sync_obj; |
1724 | void *sync_obj_arg; | |
1725 | int ret = 0; | |
1726 | ||
1717c0e2 | 1727 | if (likely(bo->sync_obj == NULL)) |
ba4e7d97 TH |
1728 | return 0; |
1729 | ||
1717c0e2 | 1730 | while (bo->sync_obj) { |
ba4e7d97 | 1731 | |
1717c0e2 DA |
1732 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { |
1733 | void *tmp_obj = bo->sync_obj; | |
1734 | bo->sync_obj = NULL; | |
1735 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1736 | spin_unlock(&bdev->fence_lock); | |
1737 | driver->sync_obj_unref(&tmp_obj); | |
1738 | spin_lock(&bdev->fence_lock); | |
ba4e7d97 TH |
1739 | continue; |
1740 | } | |
1741 | ||
1742 | if (no_wait) | |
1743 | return -EBUSY; | |
1744 | ||
1717c0e2 | 1745 | sync_obj = driver->sync_obj_ref(bo->sync_obj); |
ba4e7d97 | 1746 | sync_obj_arg = bo->sync_obj_arg; |
702adba2 | 1747 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1748 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, |
1749 | lazy, interruptible); | |
1750 | if (unlikely(ret != 0)) { | |
1751 | driver->sync_obj_unref(&sync_obj); | |
702adba2 | 1752 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1753 | return ret; |
1754 | } | |
702adba2 | 1755 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1756 | if (likely(bo->sync_obj == sync_obj && |
ba4e7d97 | 1757 | bo->sync_obj_arg == sync_obj_arg)) { |
1717c0e2 DA |
1758 | void *tmp_obj = bo->sync_obj; |
1759 | bo->sync_obj = NULL; | |
1760 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1761 | &bo->priv_flags); | |
1762 | spin_unlock(&bdev->fence_lock); | |
1763 | driver->sync_obj_unref(&sync_obj); | |
1764 | driver->sync_obj_unref(&tmp_obj); | |
1765 | spin_lock(&bdev->fence_lock); | |
fee280d3 | 1766 | } else { |
702adba2 | 1767 | spin_unlock(&bdev->fence_lock); |
fee280d3 | 1768 | driver->sync_obj_unref(&sync_obj); |
702adba2 | 1769 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1770 | } |
1771 | } | |
1772 | return 0; | |
1773 | } | |
1774 | EXPORT_SYMBOL(ttm_bo_wait); | |
1775 | ||
ba4e7d97 TH |
1776 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1777 | { | |
702adba2 | 1778 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1779 | int ret = 0; |
1780 | ||
1781 | /* | |
8cfe92d6 | 1782 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1783 | */ |
1784 | ||
1785 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1786 | if (unlikely(ret != 0)) | |
1787 | return ret; | |
702adba2 | 1788 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1789 | ret = ttm_bo_wait(bo, false, true, no_wait); |
702adba2 | 1790 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1791 | if (likely(ret == 0)) |
1792 | atomic_inc(&bo->cpu_writers); | |
1793 | ttm_bo_unreserve(bo); | |
1794 | return ret; | |
1795 | } | |
d1ede145 | 1796 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1797 | |
1798 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1799 | { | |
1800 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1801 | wake_up_all(&bo->event_queue); | |
1802 | } | |
d1ede145 | 1803 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1804 | |
1805 | /** | |
1806 | * A buffer object shrink method that tries to swap out the first | |
1807 | * buffer object on the bo_global::swap_lru list. | |
1808 | */ | |
1809 | ||
1810 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1811 | { | |
a987fcaa TH |
1812 | struct ttm_bo_global *glob = |
1813 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1814 | struct ttm_buffer_object *bo; |
1815 | int ret = -EBUSY; | |
1816 | int put_count; | |
1817 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1818 | ||
a987fcaa | 1819 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1820 | while (ret == -EBUSY) { |
a987fcaa TH |
1821 | if (unlikely(list_empty(&glob->swap_lru))) { |
1822 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1823 | return -EBUSY; |
1824 | } | |
1825 | ||
a987fcaa | 1826 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1827 | struct ttm_buffer_object, swap); |
1828 | kref_get(&bo->list_kref); | |
1829 | ||
e1efc9b6 TH |
1830 | if (!list_empty(&bo->ddestroy)) { |
1831 | spin_unlock(&glob->lru_lock); | |
1832 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1833 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1834 | continue; | |
1835 | } | |
1836 | ||
ba4e7d97 TH |
1837 | /** |
1838 | * Reserve buffer. Since we unlock while sleeping, we need | |
1839 | * to re-check that nobody removed us from the swap-list while | |
1840 | * we slept. | |
1841 | */ | |
1842 | ||
1843 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1844 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1845 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1846 | ttm_bo_wait_unreserved(bo, false); |
1847 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1848 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1849 | } |
1850 | } | |
1851 | ||
1852 | BUG_ON(ret != 0); | |
1853 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1854 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1855 | |
d6ea8886 | 1856 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
1857 | |
1858 | /** | |
1859 | * Wait for GPU, then move to system cached. | |
1860 | */ | |
1861 | ||
702adba2 | 1862 | spin_lock(&bo->bdev->fence_lock); |
1717c0e2 | 1863 | ret = ttm_bo_wait(bo, false, false, false); |
702adba2 | 1864 | spin_unlock(&bo->bdev->fence_lock); |
ba4e7d97 TH |
1865 | |
1866 | if (unlikely(ret != 0)) | |
1867 | goto out; | |
1868 | ||
1869 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1870 | struct ttm_mem_reg evict_mem; | |
1871 | ||
1872 | evict_mem = bo->mem; | |
1873 | evict_mem.mm_node = NULL; | |
1874 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1875 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1876 | ||
1877 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1878 | false, false, false); |
ba4e7d97 TH |
1879 | if (unlikely(ret != 0)) |
1880 | goto out; | |
1881 | } | |
1882 | ||
1883 | ttm_bo_unmap_virtual(bo); | |
1884 | ||
1885 | /** | |
1886 | * Swap out. Buffer will be swapped in again as soon as | |
1887 | * anyone tries to access a ttm page. | |
1888 | */ | |
1889 | ||
3f09ea4e TH |
1890 | if (bo->bdev->driver->swap_notify) |
1891 | bo->bdev->driver->swap_notify(bo); | |
1892 | ||
5df23979 | 1893 | ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); |
ba4e7d97 TH |
1894 | out: |
1895 | ||
1896 | /** | |
1897 | * | |
1898 | * Unreserve without putting on LRU to avoid swapping out an | |
1899 | * already swapped buffer. | |
1900 | */ | |
1901 | ||
1902 | atomic_set(&bo->reserved, 0); | |
1903 | wake_up_all(&bo->event_queue); | |
1904 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1905 | return ret; | |
1906 | } | |
1907 | ||
1908 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1909 | { | |
a987fcaa | 1910 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1911 | ; |
1912 | } | |
e99e1e78 | 1913 | EXPORT_SYMBOL(ttm_bo_swapout_all); |