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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 | ||
25d0479a JP |
31 | #define pr_fmt(fmt) "[TTM] " fmt |
32 | ||
ba4e7d97 TH |
33 | #include "ttm/ttm_module.h" |
34 | #include "ttm/ttm_bo_driver.h" | |
35 | #include "ttm/ttm_placement.h" | |
36 | #include <linux/jiffies.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/mm.h> | |
40 | #include <linux/file.h> | |
41 | #include <linux/module.h> | |
60063497 | 42 | #include <linux/atomic.h> |
ba4e7d97 TH |
43 | |
44 | #define TTM_ASSERT_LOCKED(param) | |
45 | #define TTM_DEBUG(fmt, arg...) | |
46 | #define TTM_BO_HASH_ORDER 13 | |
47 | ||
48 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 | 49 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
a987fcaa TH |
50 | static void ttm_bo_global_kobj_release(struct kobject *kobj); |
51 | ||
52 | static struct attribute ttm_bo_count = { | |
53 | .name = "bo_count", | |
54 | .mode = S_IRUGO | |
55 | }; | |
56 | ||
fb53f862 JG |
57 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
58 | { | |
59 | int i; | |
60 | ||
61 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
62 | if (flags & (1 << i)) { | |
63 | *mem_type = i; | |
64 | return 0; | |
65 | } | |
66 | return -EINVAL; | |
67 | } | |
68 | ||
5012f506 | 69 | static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
fb53f862 | 70 | { |
5012f506 JG |
71 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
72 | ||
25d0479a JP |
73 | pr_err(" has_type: %d\n", man->has_type); |
74 | pr_err(" use_type: %d\n", man->use_type); | |
75 | pr_err(" flags: 0x%08X\n", man->flags); | |
76 | pr_err(" gpu_offset: 0x%08lX\n", man->gpu_offset); | |
77 | pr_err(" size: %llu\n", man->size); | |
78 | pr_err(" available_caching: 0x%08X\n", man->available_caching); | |
79 | pr_err(" default_caching: 0x%08X\n", 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 | ||
25d0479a JP |
89 | pr_err("No space for %p (%lu pages, %luK, %luM)\n", |
90 | bo, bo->mem.num_pages, bo->mem.size >> 10, | |
91 | bo->mem.size >> 20); | |
fb53f862 JG |
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; | |
25d0479a JP |
97 | pr_err(" 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; | |
129b78bf DA |
346 | case ttm_bo_type_sg: |
347 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
348 | page_flags | TTM_PAGE_FLAG_SG, | |
349 | glob->dummy_read_page); | |
350 | if (unlikely(bo->ttm == NULL)) { | |
351 | ret = -ENOMEM; | |
352 | break; | |
353 | } | |
354 | bo->ttm->sg = bo->sg; | |
355 | break; | |
ba4e7d97 | 356 | default: |
25d0479a | 357 | pr_err("Illegal buffer object type\n"); |
ba4e7d97 TH |
358 | ret = -EINVAL; |
359 | break; | |
360 | } | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
365 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
366 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
367 | bool evict, bool interruptible, |
368 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
369 | { |
370 | struct ttm_bo_device *bdev = bo->bdev; | |
371 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
372 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
373 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
374 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
375 | int ret = 0; | |
376 | ||
377 | if (old_is_pci || new_is_pci || | |
eba67093 TH |
378 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { |
379 | ret = ttm_mem_io_lock(old_man, true); | |
380 | if (unlikely(ret != 0)) | |
381 | goto out_err; | |
382 | ttm_bo_unmap_virtual_locked(bo); | |
383 | ttm_mem_io_unlock(old_man); | |
384 | } | |
ba4e7d97 TH |
385 | |
386 | /* | |
387 | * Create and bind a ttm if required. | |
388 | */ | |
389 | ||
8d3bb236 BS |
390 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
391 | if (bo->ttm == NULL) { | |
ff02b13f BS |
392 | bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); |
393 | ret = ttm_bo_add_ttm(bo, zero); | |
8d3bb236 BS |
394 | if (ret) |
395 | goto out_err; | |
396 | } | |
ba4e7d97 TH |
397 | |
398 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
399 | if (ret) | |
87ef9209 | 400 | goto out_err; |
ba4e7d97 TH |
401 | |
402 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
403 | ret = ttm_tt_bind(bo->ttm, mem); | |
404 | if (ret) | |
405 | goto out_err; | |
406 | } | |
407 | ||
408 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
82ef594e BS |
409 | if (bdev->driver->move_notify) |
410 | bdev->driver->move_notify(bo, mem); | |
ca262a99 | 411 | bo->mem = *mem; |
ba4e7d97 | 412 | mem->mm_node = NULL; |
ba4e7d97 TH |
413 | goto moved; |
414 | } | |
ba4e7d97 TH |
415 | } |
416 | ||
9f1feed2 BS |
417 | if (bdev->driver->move_notify) |
418 | bdev->driver->move_notify(bo, mem); | |
419 | ||
ba4e7d97 TH |
420 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
421 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 422 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
423 | else if (bdev->driver->move) |
424 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 425 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 426 | else |
9d87fa21 | 427 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 428 | |
9f1feed2 BS |
429 | if (ret) { |
430 | if (bdev->driver->move_notify) { | |
431 | struct ttm_mem_reg tmp_mem = *mem; | |
432 | *mem = bo->mem; | |
433 | bo->mem = tmp_mem; | |
434 | bdev->driver->move_notify(bo, mem); | |
435 | bo->mem = *mem; | |
436 | } | |
ba4e7d97 | 437 | |
9f1feed2 BS |
438 | goto out_err; |
439 | } | |
dc97b340 | 440 | |
ba4e7d97 TH |
441 | moved: |
442 | if (bo->evicted) { | |
443 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
444 | if (ret) | |
25d0479a | 445 | pr_err("Can not flush read caches\n"); |
ba4e7d97 TH |
446 | bo->evicted = false; |
447 | } | |
448 | ||
449 | if (bo->mem.mm_node) { | |
d961db75 | 450 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
451 | bdev->man[bo->mem.mem_type].gpu_offset; |
452 | bo->cur_placement = bo->mem.placement; | |
354fb52c TH |
453 | } else |
454 | bo->offset = 0; | |
ba4e7d97 TH |
455 | |
456 | return 0; | |
457 | ||
458 | out_err: | |
459 | new_man = &bdev->man[bo->mem.mem_type]; | |
460 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
461 | ttm_tt_unbind(bo->ttm); | |
462 | ttm_tt_destroy(bo->ttm); | |
463 | bo->ttm = NULL; | |
464 | } | |
465 | ||
466 | return ret; | |
467 | } | |
468 | ||
1df6a2eb | 469 | /** |
40d857bb | 470 | * Call bo::reserved. |
1df6a2eb | 471 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
472 | * This is the place to put in driver specific hooks to release |
473 | * driver private resources. | |
474 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
475 | */ |
476 | ||
477 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
478 | { | |
dc97b340 JG |
479 | if (bo->bdev->driver->move_notify) |
480 | bo->bdev->driver->move_notify(bo, NULL); | |
481 | ||
1df6a2eb | 482 | if (bo->ttm) { |
1df6a2eb TH |
483 | ttm_tt_unbind(bo->ttm); |
484 | ttm_tt_destroy(bo->ttm); | |
485 | bo->ttm = NULL; | |
1df6a2eb | 486 | } |
40d857bb | 487 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
488 | |
489 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
490 | |
491 | /* | |
492 | * Make processes trying to reserve really pick it up. | |
493 | */ | |
494 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 495 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
496 | } |
497 | ||
e1efc9b6 | 498 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
499 | { |
500 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 501 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 502 | struct ttm_bo_driver *driver; |
aa123268 | 503 | void *sync_obj = NULL; |
e1efc9b6 TH |
504 | void *sync_obj_arg; |
505 | int put_count; | |
ba4e7d97 TH |
506 | int ret; |
507 | ||
702adba2 | 508 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 509 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 510 | if (!bo->sync_obj) { |
ba4e7d97 | 511 | |
a987fcaa | 512 | spin_lock(&glob->lru_lock); |
aaa20736 | 513 | |
1df6a2eb | 514 | /** |
702adba2 | 515 | * Lock inversion between bo:reserve and bdev::fence_lock here, |
e1efc9b6 | 516 | * but that's OK, since we're only trylocking. |
1df6a2eb TH |
517 | */ |
518 | ||
e1efc9b6 | 519 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 520 | |
e1efc9b6 TH |
521 | if (unlikely(ret == -EBUSY)) |
522 | goto queue; | |
1df6a2eb | 523 | |
702adba2 | 524 | spin_unlock(&bdev->fence_lock); |
1df6a2eb | 525 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 526 | |
40d857bb | 527 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 528 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 529 | |
d6ea8886 | 530 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 531 | |
e1efc9b6 TH |
532 | return; |
533 | } else { | |
534 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 535 | } |
e1efc9b6 | 536 | queue: |
e1efc9b6 | 537 | driver = bdev->driver; |
aa123268 TH |
538 | if (bo->sync_obj) |
539 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
540 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
541 | |
542 | kref_get(&bo->list_kref); | |
543 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
544 | spin_unlock(&glob->lru_lock); | |
702adba2 | 545 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 | 546 | |
aa123268 | 547 | if (sync_obj) { |
e1efc9b6 | 548 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
549 | driver->sync_obj_unref(&sync_obj); |
550 | } | |
e1efc9b6 TH |
551 | schedule_delayed_work(&bdev->wq, |
552 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
553 | } | |
554 | ||
555 | /** | |
556 | * function ttm_bo_cleanup_refs | |
557 | * If bo idle, remove from delayed- and lru lists, and unref. | |
558 | * If not idle, do nothing. | |
559 | * | |
560 | * @interruptible Any sleeps should occur interruptibly. | |
561 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
562 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
563 | */ | |
564 | ||
565 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
566 | bool interruptible, | |
567 | bool no_wait_reserve, | |
568 | bool no_wait_gpu) | |
569 | { | |
702adba2 | 570 | struct ttm_bo_device *bdev = bo->bdev; |
e1efc9b6 TH |
571 | struct ttm_bo_global *glob = bo->glob; |
572 | int put_count; | |
573 | int ret = 0; | |
574 | ||
575 | retry: | |
702adba2 | 576 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 577 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 578 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 TH |
579 | |
580 | if (unlikely(ret != 0)) | |
581 | return ret; | |
582 | ||
a987fcaa | 583 | spin_lock(&glob->lru_lock); |
26cc40a8 TH |
584 | |
585 | if (unlikely(list_empty(&bo->ddestroy))) { | |
586 | spin_unlock(&glob->lru_lock); | |
587 | return 0; | |
588 | } | |
589 | ||
e1efc9b6 TH |
590 | ret = ttm_bo_reserve_locked(bo, interruptible, |
591 | no_wait_reserve, false, 0); | |
ba4e7d97 | 592 | |
26cc40a8 | 593 | if (unlikely(ret != 0)) { |
a987fcaa | 594 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
595 | return ret; |
596 | } | |
ba4e7d97 | 597 | |
e1efc9b6 TH |
598 | /** |
599 | * We can re-check for sync object without taking | |
600 | * the bo::lock since setting the sync object requires | |
601 | * also bo::reserved. A busy object at this point may | |
602 | * be caused by another thread recently starting an accelerated | |
603 | * eviction. | |
604 | */ | |
ba4e7d97 | 605 | |
e1efc9b6 TH |
606 | if (unlikely(bo->sync_obj)) { |
607 | atomic_set(&bo->reserved, 0); | |
608 | wake_up_all(&bo->event_queue); | |
a987fcaa | 609 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 610 | goto retry; |
ba4e7d97 TH |
611 | } |
612 | ||
e1efc9b6 TH |
613 | put_count = ttm_bo_del_from_lru(bo); |
614 | list_del_init(&bo->ddestroy); | |
615 | ++put_count; | |
616 | ||
617 | spin_unlock(&glob->lru_lock); | |
618 | ttm_bo_cleanup_memtype_use(bo); | |
619 | ||
d6ea8886 | 620 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
621 | |
622 | return 0; | |
ba4e7d97 TH |
623 | } |
624 | ||
625 | /** | |
626 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
627 | * encountered buffers. | |
628 | */ | |
629 | ||
630 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
631 | { | |
a987fcaa | 632 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
633 | struct ttm_buffer_object *entry = NULL; |
634 | int ret = 0; | |
ba4e7d97 | 635 | |
a987fcaa | 636 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
637 | if (list_empty(&bdev->ddestroy)) |
638 | goto out_unlock; | |
639 | ||
640 | entry = list_first_entry(&bdev->ddestroy, | |
641 | struct ttm_buffer_object, ddestroy); | |
642 | kref_get(&entry->list_kref); | |
643 | ||
644 | for (;;) { | |
645 | struct ttm_buffer_object *nentry = NULL; | |
646 | ||
647 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
648 | nentry = list_first_entry(&entry->ddestroy, | |
649 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
650 | kref_get(&nentry->list_kref); |
651 | } | |
ba4e7d97 | 652 | |
a987fcaa | 653 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
654 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
655 | !remove_all); | |
ba4e7d97 | 656 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
657 | entry = nentry; |
658 | ||
659 | if (ret || !entry) | |
660 | goto out; | |
ba4e7d97 | 661 | |
a987fcaa | 662 | spin_lock(&glob->lru_lock); |
1a961ce0 | 663 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
664 | break; |
665 | } | |
ba4e7d97 | 666 | |
1a961ce0 LB |
667 | out_unlock: |
668 | spin_unlock(&glob->lru_lock); | |
669 | out: | |
670 | if (entry) | |
671 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
672 | return ret; |
673 | } | |
674 | ||
675 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
676 | { | |
677 | struct ttm_bo_device *bdev = | |
678 | container_of(work, struct ttm_bo_device, wq.work); | |
679 | ||
680 | if (ttm_bo_delayed_delete(bdev, false)) { | |
681 | schedule_delayed_work(&bdev->wq, | |
682 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
683 | } | |
684 | } | |
685 | ||
686 | static void ttm_bo_release(struct kref *kref) | |
687 | { | |
688 | struct ttm_buffer_object *bo = | |
689 | container_of(kref, struct ttm_buffer_object, kref); | |
690 | struct ttm_bo_device *bdev = bo->bdev; | |
eba67093 | 691 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
ba4e7d97 TH |
692 | |
693 | if (likely(bo->vm_node != NULL)) { | |
694 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
695 | drm_mm_put_block(bo->vm_node); | |
696 | bo->vm_node = NULL; | |
697 | } | |
698 | write_unlock(&bdev->vm_lock); | |
eba67093 TH |
699 | ttm_mem_io_lock(man, false); |
700 | ttm_mem_io_free_vm(bo); | |
701 | ttm_mem_io_unlock(man); | |
e1efc9b6 | 702 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
703 | kref_put(&bo->list_kref, ttm_bo_release_list); |
704 | write_lock(&bdev->vm_lock); | |
705 | } | |
706 | ||
707 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
708 | { | |
709 | struct ttm_buffer_object *bo = *p_bo; | |
710 | struct ttm_bo_device *bdev = bo->bdev; | |
711 | ||
712 | *p_bo = NULL; | |
713 | write_lock(&bdev->vm_lock); | |
714 | kref_put(&bo->kref, ttm_bo_release); | |
715 | write_unlock(&bdev->vm_lock); | |
716 | } | |
717 | EXPORT_SYMBOL(ttm_bo_unref); | |
718 | ||
7c5ee536 MG |
719 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
720 | { | |
721 | return cancel_delayed_work_sync(&bdev->wq); | |
722 | } | |
723 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
724 | ||
725 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
726 | { | |
727 | if (resched) | |
728 | schedule_delayed_work(&bdev->wq, | |
729 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
730 | } | |
731 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
732 | ||
ca262a99 | 733 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 734 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 735 | { |
ba4e7d97 TH |
736 | struct ttm_bo_device *bdev = bo->bdev; |
737 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
738 | struct ttm_placement placement; |
739 | int ret = 0; | |
ba4e7d97 | 740 | |
702adba2 | 741 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 742 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 743 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 744 | |
78ecf091 | 745 | if (unlikely(ret != 0)) { |
98ffc415 | 746 | if (ret != -ERESTARTSYS) { |
25d0479a | 747 | pr_err("Failed to expire sync object before buffer eviction\n"); |
78ecf091 | 748 | } |
ba4e7d97 TH |
749 | goto out; |
750 | } | |
751 | ||
752 | BUG_ON(!atomic_read(&bo->reserved)); | |
753 | ||
754 | evict_mem = bo->mem; | |
755 | evict_mem.mm_node = NULL; | |
eba67093 TH |
756 | evict_mem.bus.io_reserved_vm = false; |
757 | evict_mem.bus.io_reserved_count = 0; | |
ba4e7d97 | 758 | |
7cb7d1d7 JG |
759 | placement.fpfn = 0; |
760 | placement.lpfn = 0; | |
761 | placement.num_placement = 0; | |
762 | placement.num_busy_placement = 0; | |
ca262a99 JG |
763 | bdev->driver->evict_flags(bo, &placement); |
764 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 765 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 766 | if (ret) { |
fb53f862 | 767 | if (ret != -ERESTARTSYS) { |
25d0479a JP |
768 | pr_err("Failed to find memory space for buffer 0x%p eviction\n", |
769 | bo); | |
fb53f862 JG |
770 | ttm_bo_mem_space_debug(bo, &placement); |
771 | } | |
ba4e7d97 TH |
772 | goto out; |
773 | } | |
774 | ||
775 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 776 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 777 | if (ret) { |
98ffc415 | 778 | if (ret != -ERESTARTSYS) |
25d0479a | 779 | pr_err("Buffer eviction failed\n"); |
42311ff9 | 780 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
781 | goto out; |
782 | } | |
ca262a99 JG |
783 | bo->evicted = true; |
784 | out: | |
785 | return ret; | |
786 | } | |
787 | ||
788 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
789 | uint32_t mem_type, | |
9d87fa21 JG |
790 | bool interruptible, bool no_wait_reserve, |
791 | bool no_wait_gpu) | |
ca262a99 JG |
792 | { |
793 | struct ttm_bo_global *glob = bdev->glob; | |
794 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
795 | struct ttm_buffer_object *bo; | |
796 | int ret, put_count = 0; | |
ba4e7d97 | 797 | |
9c51ba1d | 798 | retry: |
a987fcaa | 799 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
800 | if (list_empty(&man->lru)) { |
801 | spin_unlock(&glob->lru_lock); | |
802 | return -EBUSY; | |
803 | } | |
804 | ||
ca262a99 JG |
805 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
806 | kref_get(&bo->list_kref); | |
9c51ba1d | 807 | |
e1efc9b6 TH |
808 | if (!list_empty(&bo->ddestroy)) { |
809 | spin_unlock(&glob->lru_lock); | |
810 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
811 | no_wait_reserve, no_wait_gpu); | |
812 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
813 | ||
814 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
815 | return ret; | |
816 | ||
817 | goto retry; | |
818 | } | |
819 | ||
9d87fa21 | 820 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
821 | |
822 | if (unlikely(ret == -EBUSY)) { | |
823 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 824 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
825 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
826 | ||
827 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
828 | ||
829 | /** | |
830 | * We *need* to retry after releasing the lru lock. | |
831 | */ | |
832 | ||
833 | if (unlikely(ret != 0)) | |
834 | return ret; | |
835 | goto retry; | |
836 | } | |
837 | ||
838 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 839 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
840 | |
841 | BUG_ON(ret != 0); | |
842 | ||
d6ea8886 | 843 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 844 | |
9d87fa21 | 845 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 846 | ttm_bo_unreserve(bo); |
9c51ba1d | 847 | |
ca262a99 | 848 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
849 | return ret; |
850 | } | |
851 | ||
42311ff9 BS |
852 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
853 | { | |
d961db75 | 854 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 855 | |
d961db75 BS |
856 | if (mem->mm_node) |
857 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
858 | } |
859 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
860 | ||
ba4e7d97 TH |
861 | /** |
862 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
863 | * space, or we've evicted everything and there isn't enough space. | |
864 | */ | |
ca262a99 JG |
865 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
866 | uint32_t mem_type, | |
867 | struct ttm_placement *placement, | |
868 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
869 | bool interruptible, |
870 | bool no_wait_reserve, | |
871 | bool no_wait_gpu) | |
ba4e7d97 | 872 | { |
ca262a99 | 873 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 874 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
875 | int ret; |
876 | ||
ba4e7d97 | 877 | do { |
d961db75 | 878 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
879 | if (unlikely(ret != 0)) |
880 | return ret; | |
d961db75 | 881 | if (mem->mm_node) |
ba4e7d97 | 882 | break; |
ca262a99 | 883 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 884 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
885 | if (unlikely(ret != 0)) |
886 | return ret; | |
ba4e7d97 | 887 | } while (1); |
d961db75 | 888 | if (mem->mm_node == NULL) |
ba4e7d97 | 889 | return -ENOMEM; |
ba4e7d97 TH |
890 | mem->mem_type = mem_type; |
891 | return 0; | |
892 | } | |
893 | ||
ae3e8122 TH |
894 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
895 | uint32_t cur_placement, | |
896 | uint32_t proposed_placement) | |
897 | { | |
898 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
899 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
900 | ||
901 | /** | |
902 | * Keep current caching if possible. | |
903 | */ | |
904 | ||
905 | if ((cur_placement & caching) != 0) | |
906 | result |= (cur_placement & caching); | |
907 | else if ((man->default_caching & caching) != 0) | |
908 | result |= man->default_caching; | |
909 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
910 | result |= TTM_PL_FLAG_CACHED; | |
911 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
912 | result |= TTM_PL_FLAG_WC; | |
913 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
914 | result |= TTM_PL_FLAG_UNCACHED; | |
915 | ||
916 | return result; | |
917 | } | |
918 | ||
ba4e7d97 | 919 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
ba4e7d97 | 920 | uint32_t mem_type, |
ae3e8122 TH |
921 | uint32_t proposed_placement, |
922 | uint32_t *masked_placement) | |
ba4e7d97 TH |
923 | { |
924 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
925 | ||
ae3e8122 | 926 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
927 | return false; |
928 | ||
ae3e8122 | 929 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 930 | return false; |
ba4e7d97 | 931 | |
ae3e8122 TH |
932 | cur_flags |= (proposed_placement & man->available_caching); |
933 | ||
934 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
935 | return true; |
936 | } | |
937 | ||
938 | /** | |
939 | * Creates space for memory region @mem according to its type. | |
940 | * | |
941 | * This function first searches for free space in compatible memory types in | |
942 | * the priority order defined by the driver. If free space isn't found, then | |
943 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
944 | * space. | |
945 | */ | |
946 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
947 | struct ttm_placement *placement, |
948 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
949 | bool interruptible, bool no_wait_reserve, |
950 | bool no_wait_gpu) | |
ba4e7d97 TH |
951 | { |
952 | struct ttm_bo_device *bdev = bo->bdev; | |
953 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
954 | uint32_t mem_type = TTM_PL_SYSTEM; |
955 | uint32_t cur_flags = 0; | |
956 | bool type_found = false; | |
957 | bool type_ok = false; | |
98ffc415 | 958 | bool has_erestartsys = false; |
ca262a99 | 959 | int i, ret; |
ba4e7d97 TH |
960 | |
961 | mem->mm_node = NULL; | |
b6637526 | 962 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
963 | ret = ttm_mem_type_from_flags(placement->placement[i], |
964 | &mem_type); | |
965 | if (ret) | |
966 | return ret; | |
ba4e7d97 TH |
967 | man = &bdev->man[mem_type]; |
968 | ||
969 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
970 | mem_type, |
971 | placement->placement[i], | |
972 | &cur_flags); | |
ba4e7d97 TH |
973 | |
974 | if (!type_ok) | |
975 | continue; | |
976 | ||
ae3e8122 TH |
977 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
978 | cur_flags); | |
ca262a99 JG |
979 | /* |
980 | * Use the access and other non-mapping-related flag bits from | |
981 | * the memory placement flags to the current flags | |
982 | */ | |
983 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
984 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 985 | |
ba4e7d97 TH |
986 | if (mem_type == TTM_PL_SYSTEM) |
987 | break; | |
988 | ||
989 | if (man->has_type && man->use_type) { | |
990 | type_found = true; | |
d961db75 | 991 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
992 | if (unlikely(ret)) |
993 | return ret; | |
ba4e7d97 | 994 | } |
d961db75 | 995 | if (mem->mm_node) |
ba4e7d97 TH |
996 | break; |
997 | } | |
998 | ||
d961db75 | 999 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
1000 | mem->mem_type = mem_type; |
1001 | mem->placement = cur_flags; | |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | if (!type_found) | |
1006 | return -EINVAL; | |
1007 | ||
b6637526 DA |
1008 | for (i = 0; i < placement->num_busy_placement; ++i) { |
1009 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
1010 | &mem_type); |
1011 | if (ret) | |
1012 | return ret; | |
ba4e7d97 | 1013 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1014 | if (!man->has_type) |
1015 | continue; | |
ba4e7d97 | 1016 | if (!ttm_bo_mt_compatible(man, |
ca262a99 | 1017 | mem_type, |
b6637526 | 1018 | placement->busy_placement[i], |
ca262a99 | 1019 | &cur_flags)) |
ba4e7d97 TH |
1020 | continue; |
1021 | ||
ae3e8122 TH |
1022 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1023 | cur_flags); | |
ca262a99 JG |
1024 | /* |
1025 | * Use the access and other non-mapping-related flag bits from | |
1026 | * the memory placement flags to the current flags | |
1027 | */ | |
b6637526 | 1028 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 1029 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1030 | |
0eaddb28 TH |
1031 | |
1032 | if (mem_type == TTM_PL_SYSTEM) { | |
1033 | mem->mem_type = mem_type; | |
1034 | mem->placement = cur_flags; | |
1035 | mem->mm_node = NULL; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
ca262a99 | 1039 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1040 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1041 | if (ret == 0 && mem->mm_node) { |
1042 | mem->placement = cur_flags; | |
1043 | return 0; | |
1044 | } | |
98ffc415 TH |
1045 | if (ret == -ERESTARTSYS) |
1046 | has_erestartsys = true; | |
ba4e7d97 | 1047 | } |
98ffc415 | 1048 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1049 | return ret; |
1050 | } | |
1051 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1052 | ||
1053 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1054 | { | |
ba4e7d97 TH |
1055 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1056 | return -EBUSY; | |
1057 | ||
98ffc415 TH |
1058 | return wait_event_interruptible(bo->event_queue, |
1059 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1060 | } |
d1ede145 | 1061 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1062 | |
1063 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1064 | struct ttm_placement *placement, |
9d87fa21 JG |
1065 | bool interruptible, bool no_wait_reserve, |
1066 | bool no_wait_gpu) | |
ba4e7d97 | 1067 | { |
ba4e7d97 TH |
1068 | int ret = 0; |
1069 | struct ttm_mem_reg mem; | |
702adba2 | 1070 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1071 | |
1072 | BUG_ON(!atomic_read(&bo->reserved)); | |
1073 | ||
1074 | /* | |
1075 | * FIXME: It's possible to pipeline buffer moves. | |
1076 | * Have the driver move function wait for idle when necessary, | |
1077 | * instead of doing it here. | |
1078 | */ | |
702adba2 | 1079 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1080 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 1081 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1082 | if (ret) |
1083 | return ret; | |
ba4e7d97 TH |
1084 | mem.num_pages = bo->num_pages; |
1085 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1086 | mem.page_alignment = bo->mem.page_alignment; | |
eba67093 TH |
1087 | mem.bus.io_reserved_vm = false; |
1088 | mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1089 | /* |
1090 | * Determine where to move the buffer. | |
1091 | */ | |
9d87fa21 | 1092 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1093 | if (ret) |
1094 | goto out_unlock; | |
9d87fa21 | 1095 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1096 | out_unlock: |
d961db75 BS |
1097 | if (ret && mem.mm_node) |
1098 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1099 | return ret; |
1100 | } | |
1101 | ||
ca262a99 | 1102 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1103 | struct ttm_mem_reg *mem) |
1104 | { | |
ca262a99 | 1105 | int i; |
e22238ea | 1106 | |
d961db75 BS |
1107 | if (mem->mm_node && placement->lpfn != 0 && |
1108 | (mem->start < placement->fpfn || | |
1109 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1110 | return -1; |
ca262a99 JG |
1111 | |
1112 | for (i = 0; i < placement->num_placement; i++) { | |
1113 | if ((placement->placement[i] & mem->placement & | |
1114 | TTM_PL_MASK_CACHING) && | |
1115 | (placement->placement[i] & mem->placement & | |
1116 | TTM_PL_MASK_MEM)) | |
1117 | return i; | |
1118 | } | |
1119 | return -1; | |
ba4e7d97 TH |
1120 | } |
1121 | ||
09855acb JG |
1122 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1123 | struct ttm_placement *placement, | |
9d87fa21 JG |
1124 | bool interruptible, bool no_wait_reserve, |
1125 | bool no_wait_gpu) | |
ba4e7d97 TH |
1126 | { |
1127 | int ret; | |
1128 | ||
1129 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1130 | /* Check that range is valid */ |
1131 | if (placement->lpfn || placement->fpfn) | |
1132 | if (placement->fpfn > placement->lpfn || | |
1133 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1134 | return -EINVAL; | |
ba4e7d97 TH |
1135 | /* |
1136 | * Check whether we need to move buffer. | |
1137 | */ | |
ca262a99 JG |
1138 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1139 | if (ret < 0) { | |
9d87fa21 | 1140 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1141 | if (ret) |
ba4e7d97 | 1142 | return ret; |
ca262a99 JG |
1143 | } else { |
1144 | /* | |
1145 | * Use the access and other non-mapping-related flag bits from | |
1146 | * the compatible memory placement flags to the active flags | |
1147 | */ | |
1148 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1149 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1150 | } |
ba4e7d97 TH |
1151 | /* |
1152 | * We might need to add a TTM. | |
1153 | */ | |
ba4e7d97 TH |
1154 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1155 | ret = ttm_bo_add_ttm(bo, true); | |
1156 | if (ret) | |
1157 | return ret; | |
1158 | } | |
ba4e7d97 TH |
1159 | return 0; |
1160 | } | |
09855acb | 1161 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1162 | |
09855acb JG |
1163 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1164 | struct ttm_placement *placement) | |
ba4e7d97 | 1165 | { |
29e190e0 TH |
1166 | BUG_ON((placement->fpfn || placement->lpfn) && |
1167 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1168 | |
ba4e7d97 TH |
1169 | return 0; |
1170 | } | |
1171 | ||
09855acb JG |
1172 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1173 | struct ttm_buffer_object *bo, | |
1174 | unsigned long size, | |
1175 | enum ttm_bo_type type, | |
1176 | struct ttm_placement *placement, | |
1177 | uint32_t page_alignment, | |
1178 | unsigned long buffer_start, | |
1179 | bool interruptible, | |
5df23979 | 1180 | struct file *persistent_swap_storage, |
09855acb | 1181 | size_t acc_size, |
129b78bf | 1182 | struct sg_table *sg, |
09855acb | 1183 | void (*destroy) (struct ttm_buffer_object *)) |
ba4e7d97 | 1184 | { |
09855acb | 1185 | int ret = 0; |
ba4e7d97 | 1186 | unsigned long num_pages; |
57de4ba9 JG |
1187 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
1188 | ||
1189 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); | |
1190 | if (ret) { | |
25d0479a | 1191 | pr_err("Out of kernel memory\n"); |
57de4ba9 JG |
1192 | if (destroy) |
1193 | (*destroy)(bo); | |
1194 | else | |
1195 | kfree(bo); | |
1196 | return -ENOMEM; | |
1197 | } | |
ba4e7d97 TH |
1198 | |
1199 | size += buffer_start & ~PAGE_MASK; | |
1200 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1201 | if (num_pages == 0) { | |
25d0479a | 1202 | pr_err("Illegal buffer object size\n"); |
7dfbbdcf TH |
1203 | if (destroy) |
1204 | (*destroy)(bo); | |
1205 | else | |
1206 | kfree(bo); | |
a393c730 | 1207 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1208 | return -EINVAL; |
1209 | } | |
1210 | bo->destroy = destroy; | |
1211 | ||
ba4e7d97 TH |
1212 | kref_init(&bo->kref); |
1213 | kref_init(&bo->list_kref); | |
1214 | atomic_set(&bo->cpu_writers, 0); | |
1215 | atomic_set(&bo->reserved, 1); | |
1216 | init_waitqueue_head(&bo->event_queue); | |
1217 | INIT_LIST_HEAD(&bo->lru); | |
1218 | INIT_LIST_HEAD(&bo->ddestroy); | |
1219 | INIT_LIST_HEAD(&bo->swap); | |
eba67093 | 1220 | INIT_LIST_HEAD(&bo->io_reserve_lru); |
ba4e7d97 | 1221 | bo->bdev = bdev; |
a987fcaa | 1222 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1223 | bo->type = type; |
1224 | bo->num_pages = num_pages; | |
eb6d2c39 | 1225 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1226 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1227 | bo->mem.num_pages = bo->num_pages; | |
1228 | bo->mem.mm_node = NULL; | |
1229 | bo->mem.page_alignment = page_alignment; | |
eba67093 TH |
1230 | bo->mem.bus.io_reserved_vm = false; |
1231 | bo->mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1232 | bo->buffer_start = buffer_start & PAGE_MASK; |
1233 | bo->priv_flags = 0; | |
1234 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1235 | bo->seq_valid = false; | |
5df23979 | 1236 | bo->persistent_swap_storage = persistent_swap_storage; |
ba4e7d97 | 1237 | bo->acc_size = acc_size; |
129b78bf | 1238 | bo->sg = sg; |
a987fcaa | 1239 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1240 | |
09855acb | 1241 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1242 | if (unlikely(ret != 0)) |
1243 | goto out_err; | |
1244 | ||
ba4e7d97 TH |
1245 | /* |
1246 | * For ttm_bo_type_device buffers, allocate | |
1247 | * address space from the device. | |
1248 | */ | |
129b78bf DA |
1249 | if (bo->type == ttm_bo_type_device || |
1250 | bo->type == ttm_bo_type_sg) { | |
ba4e7d97 TH |
1251 | ret = ttm_bo_setup_vm(bo); |
1252 | if (ret) | |
1253 | goto out_err; | |
1254 | } | |
1255 | ||
9d87fa21 | 1256 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1257 | if (ret) |
1258 | goto out_err; | |
1259 | ||
1260 | ttm_bo_unreserve(bo); | |
1261 | return 0; | |
1262 | ||
1263 | out_err: | |
1264 | ttm_bo_unreserve(bo); | |
1265 | ttm_bo_unref(&bo); | |
1266 | ||
1267 | return ret; | |
1268 | } | |
09855acb | 1269 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1270 | |
57de4ba9 JG |
1271 | size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, |
1272 | unsigned long bo_size, | |
1273 | unsigned struct_size) | |
ba4e7d97 | 1274 | { |
57de4ba9 JG |
1275 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
1276 | size_t size = 0; | |
ba4e7d97 | 1277 | |
57de4ba9 JG |
1278 | size += ttm_round_pot(struct_size); |
1279 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1280 | size += ttm_round_pot(sizeof(struct ttm_tt)); | |
1281 | return size; | |
ba4e7d97 | 1282 | } |
57de4ba9 JG |
1283 | EXPORT_SYMBOL(ttm_bo_acc_size); |
1284 | ||
1285 | size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, | |
1286 | unsigned long bo_size, | |
1287 | unsigned struct_size) | |
1288 | { | |
1289 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; | |
1290 | size_t size = 0; | |
1291 | ||
1292 | size += ttm_round_pot(struct_size); | |
1293 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1294 | size += PAGE_ALIGN(npages * sizeof(dma_addr_t)); | |
1295 | size += ttm_round_pot(sizeof(struct ttm_dma_tt)); | |
1296 | return size; | |
1297 | } | |
1298 | EXPORT_SYMBOL(ttm_bo_dma_acc_size); | |
ba4e7d97 | 1299 | |
09855acb JG |
1300 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1301 | unsigned long size, | |
1302 | enum ttm_bo_type type, | |
1303 | struct ttm_placement *placement, | |
1304 | uint32_t page_alignment, | |
1305 | unsigned long buffer_start, | |
1306 | bool interruptible, | |
5df23979 | 1307 | struct file *persistent_swap_storage, |
09855acb | 1308 | struct ttm_buffer_object **p_bo) |
ba4e7d97 TH |
1309 | { |
1310 | struct ttm_buffer_object *bo; | |
57de4ba9 | 1311 | size_t acc_size; |
ca262a99 | 1312 | int ret; |
ba4e7d97 | 1313 | |
ba4e7d97 | 1314 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
a393c730 | 1315 | if (unlikely(bo == NULL)) |
ba4e7d97 | 1316 | return -ENOMEM; |
ba4e7d97 | 1317 | |
a393c730 | 1318 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); |
09855acb JG |
1319 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1320 | buffer_start, interruptible, | |
129b78bf | 1321 | persistent_swap_storage, acc_size, NULL, NULL); |
ba4e7d97 TH |
1322 | if (likely(ret == 0)) |
1323 | *p_bo = bo; | |
1324 | ||
1325 | return ret; | |
1326 | } | |
4d798937 | 1327 | EXPORT_SYMBOL(ttm_bo_create); |
ba4e7d97 | 1328 | |
ba4e7d97 | 1329 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1330 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1331 | { |
ca262a99 | 1332 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1333 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1334 | int ret; |
ba4e7d97 TH |
1335 | |
1336 | /* | |
1337 | * Can't use standard list traversal since we're unlocking. | |
1338 | */ | |
1339 | ||
a987fcaa | 1340 | spin_lock(&glob->lru_lock); |
ca262a99 | 1341 | while (!list_empty(&man->lru)) { |
a987fcaa | 1342 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1343 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1344 | if (ret) { |
1345 | if (allow_errors) { | |
1346 | return ret; | |
1347 | } else { | |
25d0479a | 1348 | pr_err("Cleanup eviction failed\n"); |
ca262a99 JG |
1349 | } |
1350 | } | |
a987fcaa | 1351 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1352 | } |
a987fcaa | 1353 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1354 | return 0; |
1355 | } | |
1356 | ||
1357 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1358 | { | |
c96e7c7a | 1359 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1360 | int ret = -EINVAL; |
1361 | ||
1362 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
25d0479a | 1363 | pr_err("Illegal memory type %d\n", mem_type); |
ba4e7d97 TH |
1364 | return ret; |
1365 | } | |
c96e7c7a | 1366 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1367 | |
1368 | if (!man->has_type) { | |
25d0479a JP |
1369 | pr_err("Trying to take down uninitialized memory manager type %u\n", |
1370 | mem_type); | |
ba4e7d97 TH |
1371 | return ret; |
1372 | } | |
1373 | ||
1374 | man->use_type = false; | |
1375 | man->has_type = false; | |
1376 | ||
1377 | ret = 0; | |
1378 | if (mem_type > 0) { | |
ca262a99 | 1379 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1380 | |
d961db75 | 1381 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1382 | } |
1383 | ||
1384 | return ret; | |
1385 | } | |
1386 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1387 | ||
1388 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1389 | { | |
1390 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1391 | ||
1392 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
25d0479a | 1393 | pr_err("Illegal memory manager memory type %u\n", mem_type); |
ba4e7d97 TH |
1394 | return -EINVAL; |
1395 | } | |
1396 | ||
1397 | if (!man->has_type) { | |
25d0479a | 1398 | pr_err("Memory type %u has not been initialized\n", mem_type); |
ba4e7d97 TH |
1399 | return 0; |
1400 | } | |
1401 | ||
ca262a99 | 1402 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1403 | } |
1404 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1405 | ||
1406 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1407 | unsigned long p_size) |
ba4e7d97 TH |
1408 | { |
1409 | int ret = -EINVAL; | |
1410 | struct ttm_mem_type_manager *man; | |
1411 | ||
dbc4a5b8 | 1412 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1413 | man = &bdev->man[type]; |
dbc4a5b8 | 1414 | BUG_ON(man->has_type); |
eba67093 TH |
1415 | man->io_reserve_fastpath = true; |
1416 | man->use_io_reserve_lru = false; | |
1417 | mutex_init(&man->io_reserve_mutex); | |
1418 | INIT_LIST_HEAD(&man->io_reserve_lru); | |
ba4e7d97 TH |
1419 | |
1420 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1421 | if (ret) | |
1422 | return ret; | |
d961db75 | 1423 | man->bdev = bdev; |
ba4e7d97 TH |
1424 | |
1425 | ret = 0; | |
1426 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1427 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1428 | if (ret) |
1429 | return ret; | |
1430 | } | |
1431 | man->has_type = true; | |
1432 | man->use_type = true; | |
1433 | man->size = p_size; | |
1434 | ||
1435 | INIT_LIST_HEAD(&man->lru); | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1440 | ||
a987fcaa TH |
1441 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1442 | { | |
1443 | struct ttm_bo_global *glob = | |
1444 | container_of(kobj, struct ttm_bo_global, kobj); | |
1445 | ||
a987fcaa TH |
1446 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1447 | __free_page(glob->dummy_read_page); | |
1448 | kfree(glob); | |
1449 | } | |
1450 | ||
ba4420c2 | 1451 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1452 | { |
1453 | struct ttm_bo_global *glob = ref->object; | |
1454 | ||
1455 | kobject_del(&glob->kobj); | |
1456 | kobject_put(&glob->kobj); | |
1457 | } | |
1458 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1459 | ||
ba4420c2 | 1460 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1461 | { |
1462 | struct ttm_bo_global_ref *bo_ref = | |
1463 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1464 | struct ttm_bo_global *glob = ref->object; | |
1465 | int ret; | |
1466 | ||
1467 | mutex_init(&glob->device_list_mutex); | |
1468 | spin_lock_init(&glob->lru_lock); | |
1469 | glob->mem_glob = bo_ref->mem_glob; | |
1470 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1471 | ||
1472 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1473 | ret = -ENOMEM; | |
1474 | goto out_no_drp; | |
1475 | } | |
1476 | ||
1477 | INIT_LIST_HEAD(&glob->swap_lru); | |
1478 | INIT_LIST_HEAD(&glob->device_list); | |
1479 | ||
1480 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1481 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1482 | if (unlikely(ret != 0)) { | |
25d0479a | 1483 | pr_err("Could not register buffer object swapout\n"); |
a987fcaa TH |
1484 | goto out_no_shrink; |
1485 | } | |
1486 | ||
a987fcaa TH |
1487 | atomic_set(&glob->bo_count, 0); |
1488 | ||
b642ed06 RD |
1489 | ret = kobject_init_and_add( |
1490 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1491 | if (unlikely(ret != 0)) |
1492 | kobject_put(&glob->kobj); | |
1493 | return ret; | |
1494 | out_no_shrink: | |
1495 | __free_page(glob->dummy_read_page); | |
1496 | out_no_drp: | |
1497 | kfree(glob); | |
1498 | return ret; | |
1499 | } | |
1500 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1501 | ||
1502 | ||
ba4e7d97 TH |
1503 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1504 | { | |
1505 | int ret = 0; | |
1506 | unsigned i = TTM_NUM_MEM_TYPES; | |
1507 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1508 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1509 | |
1510 | while (i--) { | |
1511 | man = &bdev->man[i]; | |
1512 | if (man->has_type) { | |
1513 | man->use_type = false; | |
1514 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1515 | ret = -EBUSY; | |
25d0479a JP |
1516 | pr_err("DRM memory manager type %d is not clean\n", |
1517 | i); | |
ba4e7d97 TH |
1518 | } |
1519 | man->has_type = false; | |
1520 | } | |
1521 | } | |
1522 | ||
a987fcaa TH |
1523 | mutex_lock(&glob->device_list_mutex); |
1524 | list_del(&bdev->device_list); | |
1525 | mutex_unlock(&glob->device_list_mutex); | |
1526 | ||
f094cfc6 | 1527 | cancel_delayed_work_sync(&bdev->wq); |
ba4e7d97 TH |
1528 | |
1529 | while (ttm_bo_delayed_delete(bdev, true)) | |
1530 | ; | |
1531 | ||
a987fcaa | 1532 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1533 | if (list_empty(&bdev->ddestroy)) |
1534 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1535 | ||
1536 | if (list_empty(&bdev->man[0].lru)) | |
1537 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1538 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1539 | |
ba4e7d97 TH |
1540 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1541 | write_lock(&bdev->vm_lock); | |
1542 | drm_mm_takedown(&bdev->addr_space_mm); | |
1543 | write_unlock(&bdev->vm_lock); | |
1544 | ||
ba4e7d97 TH |
1545 | return ret; |
1546 | } | |
1547 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1548 | ||
ba4e7d97 | 1549 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1550 | struct ttm_bo_global *glob, |
1551 | struct ttm_bo_driver *driver, | |
51c8b407 | 1552 | uint64_t file_page_offset, |
ad49f501 | 1553 | bool need_dma32) |
ba4e7d97 TH |
1554 | { |
1555 | int ret = -EINVAL; | |
1556 | ||
ba4e7d97 | 1557 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1558 | bdev->driver = driver; |
ba4e7d97 TH |
1559 | |
1560 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1561 | ||
ba4e7d97 TH |
1562 | /* |
1563 | * Initialize the system memory buffer type. | |
1564 | * Other types need to be driver / IOCTL initialized. | |
1565 | */ | |
ca262a99 | 1566 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1567 | if (unlikely(ret != 0)) |
a987fcaa | 1568 | goto out_no_sys; |
ba4e7d97 TH |
1569 | |
1570 | bdev->addr_space_rb = RB_ROOT; | |
1571 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1572 | if (unlikely(ret != 0)) | |
a987fcaa | 1573 | goto out_no_addr_mm; |
ba4e7d97 TH |
1574 | |
1575 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1576 | bdev->nice_mode = true; | |
1577 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1578 | bdev->dev_mapping = NULL; |
a987fcaa | 1579 | bdev->glob = glob; |
ad49f501 | 1580 | bdev->need_dma32 = need_dma32; |
65705962 | 1581 | bdev->val_seq = 0; |
702adba2 | 1582 | spin_lock_init(&bdev->fence_lock); |
a987fcaa TH |
1583 | mutex_lock(&glob->device_list_mutex); |
1584 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1585 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1586 | |
1587 | return 0; | |
a987fcaa | 1588 | out_no_addr_mm: |
ba4e7d97 | 1589 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1590 | out_no_sys: |
ba4e7d97 TH |
1591 | return ret; |
1592 | } | |
1593 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1594 | ||
1595 | /* | |
1596 | * buffer object vm functions. | |
1597 | */ | |
1598 | ||
1599 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1600 | { | |
1601 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1602 | ||
1603 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1604 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1605 | return false; | |
1606 | ||
1607 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1608 | return false; | |
1609 | ||
1610 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1611 | return false; | |
1612 | } | |
1613 | return true; | |
1614 | } | |
1615 | ||
eba67093 | 1616 | void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
1617 | { |
1618 | struct ttm_bo_device *bdev = bo->bdev; | |
1619 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1620 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1621 | ||
1622 | if (!bdev->dev_mapping) | |
1623 | return; | |
ba4e7d97 | 1624 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
eba67093 | 1625 | ttm_mem_io_free_vm(bo); |
ba4e7d97 | 1626 | } |
eba67093 TH |
1627 | |
1628 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1629 | { | |
1630 | struct ttm_bo_device *bdev = bo->bdev; | |
1631 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; | |
1632 | ||
1633 | ttm_mem_io_lock(man, false); | |
1634 | ttm_bo_unmap_virtual_locked(bo); | |
1635 | ttm_mem_io_unlock(man); | |
ba4e7d97 | 1636 | } |
eba67093 TH |
1637 | |
1638 | ||
e024e110 | 1639 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1640 | |
1641 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1642 | { | |
1643 | struct ttm_bo_device *bdev = bo->bdev; | |
1644 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1645 | struct rb_node *parent = NULL; | |
1646 | struct ttm_buffer_object *cur_bo; | |
1647 | unsigned long offset = bo->vm_node->start; | |
1648 | unsigned long cur_offset; | |
1649 | ||
1650 | while (*cur) { | |
1651 | parent = *cur; | |
1652 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1653 | cur_offset = cur_bo->vm_node->start; | |
1654 | if (offset < cur_offset) | |
1655 | cur = &parent->rb_left; | |
1656 | else if (offset > cur_offset) | |
1657 | cur = &parent->rb_right; | |
1658 | else | |
1659 | BUG(); | |
1660 | } | |
1661 | ||
1662 | rb_link_node(&bo->vm_rb, parent, cur); | |
1663 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * ttm_bo_setup_vm: | |
1668 | * | |
1669 | * @bo: the buffer to allocate address space for | |
1670 | * | |
1671 | * Allocate address space in the drm device so that applications | |
1672 | * can mmap the buffer and access the contents. This only | |
1673 | * applies to ttm_bo_type_device objects as others are not | |
1674 | * placed in the drm device address space. | |
1675 | */ | |
1676 | ||
1677 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1678 | { | |
1679 | struct ttm_bo_device *bdev = bo->bdev; | |
1680 | int ret; | |
1681 | ||
1682 | retry_pre_get: | |
1683 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1684 | if (unlikely(ret != 0)) | |
1685 | return ret; | |
1686 | ||
1687 | write_lock(&bdev->vm_lock); | |
1688 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1689 | bo->mem.num_pages, 0, 0); | |
1690 | ||
1691 | if (unlikely(bo->vm_node == NULL)) { | |
1692 | ret = -ENOMEM; | |
1693 | goto out_unlock; | |
1694 | } | |
1695 | ||
1696 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1697 | bo->mem.num_pages, 0); | |
1698 | ||
1699 | if (unlikely(bo->vm_node == NULL)) { | |
1700 | write_unlock(&bdev->vm_lock); | |
1701 | goto retry_pre_get; | |
1702 | } | |
1703 | ||
1704 | ttm_bo_vm_insert_rb(bo); | |
1705 | write_unlock(&bdev->vm_lock); | |
1706 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1707 | ||
1708 | return 0; | |
1709 | out_unlock: | |
1710 | write_unlock(&bdev->vm_lock); | |
1711 | return ret; | |
1712 | } | |
1713 | ||
1714 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1717c0e2 | 1715 | bool lazy, bool interruptible, bool no_wait) |
ba4e7d97 TH |
1716 | { |
1717 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
702adba2 | 1718 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1719 | void *sync_obj; |
1720 | void *sync_obj_arg; | |
1721 | int ret = 0; | |
1722 | ||
1717c0e2 | 1723 | if (likely(bo->sync_obj == NULL)) |
ba4e7d97 TH |
1724 | return 0; |
1725 | ||
1717c0e2 | 1726 | while (bo->sync_obj) { |
ba4e7d97 | 1727 | |
1717c0e2 DA |
1728 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { |
1729 | void *tmp_obj = bo->sync_obj; | |
1730 | bo->sync_obj = NULL; | |
1731 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1732 | spin_unlock(&bdev->fence_lock); | |
1733 | driver->sync_obj_unref(&tmp_obj); | |
1734 | spin_lock(&bdev->fence_lock); | |
ba4e7d97 TH |
1735 | continue; |
1736 | } | |
1737 | ||
1738 | if (no_wait) | |
1739 | return -EBUSY; | |
1740 | ||
1717c0e2 | 1741 | sync_obj = driver->sync_obj_ref(bo->sync_obj); |
ba4e7d97 | 1742 | sync_obj_arg = bo->sync_obj_arg; |
702adba2 | 1743 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1744 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, |
1745 | lazy, interruptible); | |
1746 | if (unlikely(ret != 0)) { | |
1747 | driver->sync_obj_unref(&sync_obj); | |
702adba2 | 1748 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1749 | return ret; |
1750 | } | |
702adba2 | 1751 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1752 | if (likely(bo->sync_obj == sync_obj && |
ba4e7d97 | 1753 | bo->sync_obj_arg == sync_obj_arg)) { |
1717c0e2 DA |
1754 | void *tmp_obj = bo->sync_obj; |
1755 | bo->sync_obj = NULL; | |
1756 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1757 | &bo->priv_flags); | |
1758 | spin_unlock(&bdev->fence_lock); | |
1759 | driver->sync_obj_unref(&sync_obj); | |
1760 | driver->sync_obj_unref(&tmp_obj); | |
1761 | spin_lock(&bdev->fence_lock); | |
fee280d3 | 1762 | } else { |
702adba2 | 1763 | spin_unlock(&bdev->fence_lock); |
fee280d3 | 1764 | driver->sync_obj_unref(&sync_obj); |
702adba2 | 1765 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1766 | } |
1767 | } | |
1768 | return 0; | |
1769 | } | |
1770 | EXPORT_SYMBOL(ttm_bo_wait); | |
1771 | ||
ba4e7d97 TH |
1772 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1773 | { | |
702adba2 | 1774 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1775 | int ret = 0; |
1776 | ||
1777 | /* | |
8cfe92d6 | 1778 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1779 | */ |
1780 | ||
1781 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1782 | if (unlikely(ret != 0)) | |
1783 | return ret; | |
702adba2 | 1784 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1785 | ret = ttm_bo_wait(bo, false, true, no_wait); |
702adba2 | 1786 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1787 | if (likely(ret == 0)) |
1788 | atomic_inc(&bo->cpu_writers); | |
1789 | ttm_bo_unreserve(bo); | |
1790 | return ret; | |
1791 | } | |
d1ede145 | 1792 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1793 | |
1794 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1795 | { | |
1796 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1797 | wake_up_all(&bo->event_queue); | |
1798 | } | |
d1ede145 | 1799 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1800 | |
1801 | /** | |
1802 | * A buffer object shrink method that tries to swap out the first | |
1803 | * buffer object on the bo_global::swap_lru list. | |
1804 | */ | |
1805 | ||
1806 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1807 | { | |
a987fcaa TH |
1808 | struct ttm_bo_global *glob = |
1809 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1810 | struct ttm_buffer_object *bo; |
1811 | int ret = -EBUSY; | |
1812 | int put_count; | |
1813 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1814 | ||
a987fcaa | 1815 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1816 | while (ret == -EBUSY) { |
a987fcaa TH |
1817 | if (unlikely(list_empty(&glob->swap_lru))) { |
1818 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1819 | return -EBUSY; |
1820 | } | |
1821 | ||
a987fcaa | 1822 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1823 | struct ttm_buffer_object, swap); |
1824 | kref_get(&bo->list_kref); | |
1825 | ||
e1efc9b6 TH |
1826 | if (!list_empty(&bo->ddestroy)) { |
1827 | spin_unlock(&glob->lru_lock); | |
1828 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1829 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a8ff3ee2 | 1830 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
1831 | continue; |
1832 | } | |
1833 | ||
ba4e7d97 TH |
1834 | /** |
1835 | * Reserve buffer. Since we unlock while sleeping, we need | |
1836 | * to re-check that nobody removed us from the swap-list while | |
1837 | * we slept. | |
1838 | */ | |
1839 | ||
1840 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1841 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1842 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1843 | ttm_bo_wait_unreserved(bo, false); |
1844 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1845 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1846 | } |
1847 | } | |
1848 | ||
1849 | BUG_ON(ret != 0); | |
1850 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1851 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1852 | |
d6ea8886 | 1853 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
1854 | |
1855 | /** | |
1856 | * Wait for GPU, then move to system cached. | |
1857 | */ | |
1858 | ||
702adba2 | 1859 | spin_lock(&bo->bdev->fence_lock); |
1717c0e2 | 1860 | ret = ttm_bo_wait(bo, false, false, false); |
702adba2 | 1861 | spin_unlock(&bo->bdev->fence_lock); |
ba4e7d97 TH |
1862 | |
1863 | if (unlikely(ret != 0)) | |
1864 | goto out; | |
1865 | ||
1866 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1867 | struct ttm_mem_reg evict_mem; | |
1868 | ||
1869 | evict_mem = bo->mem; | |
1870 | evict_mem.mm_node = NULL; | |
1871 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1872 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1873 | ||
1874 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1875 | false, false, false); |
ba4e7d97 TH |
1876 | if (unlikely(ret != 0)) |
1877 | goto out; | |
1878 | } | |
1879 | ||
1880 | ttm_bo_unmap_virtual(bo); | |
1881 | ||
1882 | /** | |
1883 | * Swap out. Buffer will be swapped in again as soon as | |
1884 | * anyone tries to access a ttm page. | |
1885 | */ | |
1886 | ||
3f09ea4e TH |
1887 | if (bo->bdev->driver->swap_notify) |
1888 | bo->bdev->driver->swap_notify(bo); | |
1889 | ||
5df23979 | 1890 | ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); |
ba4e7d97 TH |
1891 | out: |
1892 | ||
1893 | /** | |
1894 | * | |
1895 | * Unreserve without putting on LRU to avoid swapping out an | |
1896 | * already swapped buffer. | |
1897 | */ | |
1898 | ||
1899 | atomic_set(&bo->reserved, 0); | |
1900 | wake_up_all(&bo->event_queue); | |
1901 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1902 | return ret; | |
1903 | } | |
1904 | ||
1905 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1906 | { | |
a987fcaa | 1907 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1908 | ; |
1909 | } | |
e99e1e78 | 1910 | EXPORT_SYMBOL(ttm_bo_swapout_all); |