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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 | ||
760285e7 DH |
33 | #include <drm/ttm/ttm_module.h> |
34 | #include <drm/ttm/ttm_bo_driver.h> | |
35 | #include <drm/ttm/ttm_placement.h> | |
ba4e7d97 TH |
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, |
a9dbfff1 | 165 | !ttm_bo_is_reserved(bo)); |
ba4e7d97 | 166 | } else { |
a9dbfff1 | 167 | wait_event(bo->event_queue, !ttm_bo_is_reserved(bo)); |
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 | ||
a9dbfff1 | 178 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ba4e7d97 TH |
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 | ||
6c1e963c | 223 | while (unlikely(atomic_read(&bo->reserved) != 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 | ||
6c1e963c | 252 | atomic_set(&bo->reserved, 1); |
ba4e7d97 | 253 | if (use_sequence) { |
95ccb0f3 TH |
254 | /** |
255 | * Wake up waiters that may need to recheck for deadlock, | |
256 | * if we decreased the sequence number. | |
257 | */ | |
258 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
259 | || !bo->seq_valid)) | |
260 | wake_up_all(&bo->event_queue); | |
261 | ||
ba4e7d97 TH |
262 | bo->val_seq = sequence; |
263 | bo->seq_valid = true; | |
264 | } else { | |
265 | bo->seq_valid = false; | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | EXPORT_SYMBOL(ttm_bo_reserve); | |
271 | ||
272 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
273 | { | |
274 | BUG(); | |
275 | } | |
276 | ||
d6ea8886 DA |
277 | void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
278 | bool never_free) | |
279 | { | |
2357cbe5 TH |
280 | kref_sub(&bo->list_kref, count, |
281 | (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list); | |
d6ea8886 DA |
282 | } |
283 | ||
ba4e7d97 TH |
284 | int ttm_bo_reserve(struct ttm_buffer_object *bo, |
285 | bool interruptible, | |
286 | bool no_wait, bool use_sequence, uint32_t sequence) | |
287 | { | |
a987fcaa | 288 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
289 | int put_count = 0; |
290 | int ret; | |
291 | ||
a987fcaa | 292 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
293 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
294 | sequence); | |
295 | if (likely(ret == 0)) | |
296 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 297 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 298 | |
d6ea8886 | 299 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
300 | |
301 | return ret; | |
302 | } | |
303 | ||
95762c2b TH |
304 | void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo) |
305 | { | |
306 | ttm_bo_add_to_lru(bo); | |
307 | atomic_set(&bo->reserved, 0); | |
308 | wake_up_all(&bo->event_queue); | |
309 | } | |
310 | ||
ba4e7d97 TH |
311 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) |
312 | { | |
a987fcaa | 313 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 314 | |
a987fcaa | 315 | spin_lock(&glob->lru_lock); |
95762c2b | 316 | ttm_bo_unreserve_locked(bo); |
a987fcaa | 317 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
318 | } |
319 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
320 | ||
321 | /* | |
322 | * Call bo->mutex locked. | |
323 | */ | |
ba4e7d97 TH |
324 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
325 | { | |
326 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 327 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
328 | int ret = 0; |
329 | uint32_t page_flags = 0; | |
330 | ||
331 | TTM_ASSERT_LOCKED(&bo->mutex); | |
332 | bo->ttm = NULL; | |
333 | ||
ad49f501 DA |
334 | if (bdev->need_dma32) |
335 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
336 | ||
ba4e7d97 TH |
337 | switch (bo->type) { |
338 | case ttm_bo_type_device: | |
339 | if (zero_alloc) | |
340 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
341 | case ttm_bo_type_kernel: | |
649bf3ca JG |
342 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, |
343 | page_flags, glob->dummy_read_page); | |
ba4e7d97 TH |
344 | if (unlikely(bo->ttm == NULL)) |
345 | ret = -ENOMEM; | |
346 | break; | |
129b78bf DA |
347 | case ttm_bo_type_sg: |
348 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
349 | page_flags | TTM_PAGE_FLAG_SG, | |
350 | glob->dummy_read_page); | |
351 | if (unlikely(bo->ttm == NULL)) { | |
352 | ret = -ENOMEM; | |
353 | break; | |
354 | } | |
355 | bo->ttm->sg = bo->sg; | |
356 | break; | |
ba4e7d97 | 357 | default: |
25d0479a | 358 | pr_err("Illegal buffer object type\n"); |
ba4e7d97 TH |
359 | ret = -EINVAL; |
360 | break; | |
361 | } | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
367 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
368 | bool evict, bool interruptible, |
369 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
370 | { |
371 | struct ttm_bo_device *bdev = bo->bdev; | |
372 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
373 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
374 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
375 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
376 | int ret = 0; | |
377 | ||
378 | if (old_is_pci || new_is_pci || | |
eba67093 TH |
379 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { |
380 | ret = ttm_mem_io_lock(old_man, true); | |
381 | if (unlikely(ret != 0)) | |
382 | goto out_err; | |
383 | ttm_bo_unmap_virtual_locked(bo); | |
384 | ttm_mem_io_unlock(old_man); | |
385 | } | |
ba4e7d97 TH |
386 | |
387 | /* | |
388 | * Create and bind a ttm if required. | |
389 | */ | |
390 | ||
8d3bb236 BS |
391 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
392 | if (bo->ttm == NULL) { | |
ff02b13f BS |
393 | bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); |
394 | ret = ttm_bo_add_ttm(bo, zero); | |
8d3bb236 BS |
395 | if (ret) |
396 | goto out_err; | |
397 | } | |
ba4e7d97 TH |
398 | |
399 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
400 | if (ret) | |
87ef9209 | 401 | goto out_err; |
ba4e7d97 TH |
402 | |
403 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
404 | ret = ttm_tt_bind(bo->ttm, mem); | |
405 | if (ret) | |
406 | goto out_err; | |
407 | } | |
408 | ||
409 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
82ef594e BS |
410 | if (bdev->driver->move_notify) |
411 | bdev->driver->move_notify(bo, mem); | |
ca262a99 | 412 | bo->mem = *mem; |
ba4e7d97 | 413 | mem->mm_node = NULL; |
ba4e7d97 TH |
414 | goto moved; |
415 | } | |
ba4e7d97 TH |
416 | } |
417 | ||
9f1feed2 BS |
418 | if (bdev->driver->move_notify) |
419 | bdev->driver->move_notify(bo, mem); | |
420 | ||
ba4e7d97 TH |
421 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
422 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 423 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
424 | else if (bdev->driver->move) |
425 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 426 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 427 | else |
9d87fa21 | 428 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 429 | |
9f1feed2 BS |
430 | if (ret) { |
431 | if (bdev->driver->move_notify) { | |
432 | struct ttm_mem_reg tmp_mem = *mem; | |
433 | *mem = bo->mem; | |
434 | bo->mem = tmp_mem; | |
435 | bdev->driver->move_notify(bo, mem); | |
436 | bo->mem = *mem; | |
437 | } | |
ba4e7d97 | 438 | |
9f1feed2 BS |
439 | goto out_err; |
440 | } | |
dc97b340 | 441 | |
ba4e7d97 TH |
442 | moved: |
443 | if (bo->evicted) { | |
444 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
445 | if (ret) | |
25d0479a | 446 | pr_err("Can not flush read caches\n"); |
ba4e7d97 TH |
447 | bo->evicted = false; |
448 | } | |
449 | ||
450 | if (bo->mem.mm_node) { | |
d961db75 | 451 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
452 | bdev->man[bo->mem.mem_type].gpu_offset; |
453 | bo->cur_placement = bo->mem.placement; | |
354fb52c TH |
454 | } else |
455 | bo->offset = 0; | |
ba4e7d97 TH |
456 | |
457 | return 0; | |
458 | ||
459 | out_err: | |
460 | new_man = &bdev->man[bo->mem.mem_type]; | |
461 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
462 | ttm_tt_unbind(bo->ttm); | |
463 | ttm_tt_destroy(bo->ttm); | |
464 | bo->ttm = NULL; | |
465 | } | |
466 | ||
467 | return ret; | |
468 | } | |
469 | ||
1df6a2eb | 470 | /** |
40d857bb | 471 | * Call bo::reserved. |
1df6a2eb | 472 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
473 | * This is the place to put in driver specific hooks to release |
474 | * driver private resources. | |
475 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
476 | */ |
477 | ||
478 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
479 | { | |
dc97b340 JG |
480 | if (bo->bdev->driver->move_notify) |
481 | bo->bdev->driver->move_notify(bo, NULL); | |
482 | ||
1df6a2eb | 483 | if (bo->ttm) { |
1df6a2eb TH |
484 | ttm_tt_unbind(bo->ttm); |
485 | ttm_tt_destroy(bo->ttm); | |
486 | bo->ttm = NULL; | |
1df6a2eb | 487 | } |
40d857bb | 488 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
489 | |
490 | atomic_set(&bo->reserved, 0); | |
85b144f8 | 491 | wake_up_all(&bo->event_queue); |
06fba6d4 TH |
492 | |
493 | /* | |
85b144f8 ML |
494 | * Since the final reference to this bo may not be dropped by |
495 | * the current task we have to put a memory barrier here to make | |
496 | * sure the changes done in this function are always visible. | |
497 | * | |
498 | * This function only needs protection against the final kref_put. | |
06fba6d4 | 499 | */ |
85b144f8 | 500 | smp_mb__before_atomic_dec(); |
1df6a2eb TH |
501 | } |
502 | ||
e1efc9b6 | 503 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
504 | { |
505 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 506 | struct ttm_bo_global *glob = bo->glob; |
4154f051 | 507 | struct ttm_bo_driver *driver = bdev->driver; |
aa123268 | 508 | void *sync_obj = NULL; |
e1efc9b6 | 509 | int put_count; |
ba4e7d97 TH |
510 | int ret; |
511 | ||
4154f051 ML |
512 | spin_lock(&glob->lru_lock); |
513 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
514 | ||
702adba2 | 515 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 516 | (void) ttm_bo_wait(bo, false, false, true); |
4154f051 | 517 | if (!ret && !bo->sync_obj) { |
702adba2 | 518 | spin_unlock(&bdev->fence_lock); |
1df6a2eb | 519 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 520 | |
40d857bb | 521 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 522 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 523 | |
d6ea8886 | 524 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 525 | |
e1efc9b6 | 526 | return; |
ba4e7d97 | 527 | } |
aa123268 TH |
528 | if (bo->sync_obj) |
529 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
4154f051 ML |
530 | spin_unlock(&bdev->fence_lock); |
531 | ||
532 | if (!ret) { | |
533 | atomic_set(&bo->reserved, 0); | |
534 | wake_up_all(&bo->event_queue); | |
535 | } | |
e1efc9b6 TH |
536 | |
537 | kref_get(&bo->list_kref); | |
538 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
539 | spin_unlock(&glob->lru_lock); | |
e1efc9b6 | 540 | |
aa123268 | 541 | if (sync_obj) { |
dedfdffd | 542 | driver->sync_obj_flush(sync_obj); |
aa123268 TH |
543 | driver->sync_obj_unref(&sync_obj); |
544 | } | |
e1efc9b6 TH |
545 | schedule_delayed_work(&bdev->wq, |
546 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
547 | } | |
548 | ||
549 | /** | |
85b144f8 | 550 | * function ttm_bo_cleanup_refs_and_unlock |
e1efc9b6 TH |
551 | * If bo idle, remove from delayed- and lru lists, and unref. |
552 | * If not idle, do nothing. | |
553 | * | |
85b144f8 ML |
554 | * Must be called with lru_lock and reservation held, this function |
555 | * will drop both before returning. | |
556 | * | |
e1efc9b6 | 557 | * @interruptible Any sleeps should occur interruptibly. |
e1efc9b6 TH |
558 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. |
559 | */ | |
560 | ||
85b144f8 ML |
561 | static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, |
562 | bool interruptible, | |
563 | bool no_wait_gpu) | |
e1efc9b6 | 564 | { |
702adba2 | 565 | struct ttm_bo_device *bdev = bo->bdev; |
85b144f8 | 566 | struct ttm_bo_driver *driver = bdev->driver; |
e1efc9b6 TH |
567 | struct ttm_bo_global *glob = bo->glob; |
568 | int put_count; | |
85b144f8 | 569 | int ret; |
e1efc9b6 | 570 | |
702adba2 | 571 | spin_lock(&bdev->fence_lock); |
85b144f8 | 572 | ret = ttm_bo_wait(bo, false, false, true); |
e1efc9b6 | 573 | |
85b144f8 ML |
574 | if (ret && !no_wait_gpu) { |
575 | void *sync_obj; | |
e1efc9b6 | 576 | |
85b144f8 ML |
577 | /* |
578 | * Take a reference to the fence and unreserve, | |
579 | * at this point the buffer should be dead, so | |
580 | * no new sync objects can be attached. | |
581 | */ | |
582 | sync_obj = driver->sync_obj_ref(&bo->sync_obj); | |
583 | spin_unlock(&bdev->fence_lock); | |
26cc40a8 | 584 | |
85b144f8 ML |
585 | atomic_set(&bo->reserved, 0); |
586 | wake_up_all(&bo->event_queue); | |
26cc40a8 | 587 | spin_unlock(&glob->lru_lock); |
26cc40a8 | 588 | |
85b144f8 ML |
589 | ret = driver->sync_obj_wait(sync_obj, false, interruptible); |
590 | driver->sync_obj_unref(&sync_obj); | |
591 | if (ret) | |
b8e902f2 TH |
592 | return ret; |
593 | ||
85b144f8 ML |
594 | /* |
595 | * remove sync_obj with ttm_bo_wait, the wait should be | |
596 | * finished, and no new wait object should have been added. | |
597 | */ | |
598 | spin_lock(&bdev->fence_lock); | |
599 | ret = ttm_bo_wait(bo, false, false, true); | |
600 | WARN_ON(ret); | |
601 | spin_unlock(&bdev->fence_lock); | |
602 | if (ret) | |
603 | return ret; | |
ba4e7d97 | 604 | |
85b144f8 ML |
605 | spin_lock(&glob->lru_lock); |
606 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
b8e902f2 | 607 | |
85b144f8 ML |
608 | /* |
609 | * We raced, and lost, someone else holds the reservation now, | |
610 | * and is probably busy in ttm_bo_cleanup_memtype_use. | |
611 | * | |
612 | * Even if it's not the case, because we finished waiting any | |
613 | * delayed destruction would succeed, so just return success | |
614 | * here. | |
615 | */ | |
616 | if (ret) { | |
617 | spin_unlock(&glob->lru_lock); | |
618 | return 0; | |
619 | } | |
620 | } else | |
621 | spin_unlock(&bdev->fence_lock); | |
ba4e7d97 | 622 | |
85b144f8 | 623 | if (ret || unlikely(list_empty(&bo->ddestroy))) { |
e1efc9b6 TH |
624 | atomic_set(&bo->reserved, 0); |
625 | wake_up_all(&bo->event_queue); | |
a987fcaa | 626 | spin_unlock(&glob->lru_lock); |
85b144f8 | 627 | return ret; |
ba4e7d97 TH |
628 | } |
629 | ||
e1efc9b6 TH |
630 | put_count = ttm_bo_del_from_lru(bo); |
631 | list_del_init(&bo->ddestroy); | |
632 | ++put_count; | |
633 | ||
634 | spin_unlock(&glob->lru_lock); | |
635 | ttm_bo_cleanup_memtype_use(bo); | |
636 | ||
d6ea8886 | 637 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
638 | |
639 | return 0; | |
ba4e7d97 TH |
640 | } |
641 | ||
642 | /** | |
643 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
644 | * encountered buffers. | |
645 | */ | |
646 | ||
647 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
648 | { | |
a987fcaa | 649 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
650 | struct ttm_buffer_object *entry = NULL; |
651 | int ret = 0; | |
ba4e7d97 | 652 | |
a987fcaa | 653 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
654 | if (list_empty(&bdev->ddestroy)) |
655 | goto out_unlock; | |
656 | ||
657 | entry = list_first_entry(&bdev->ddestroy, | |
658 | struct ttm_buffer_object, ddestroy); | |
659 | kref_get(&entry->list_kref); | |
660 | ||
661 | for (;;) { | |
662 | struct ttm_buffer_object *nentry = NULL; | |
663 | ||
664 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
665 | nentry = list_first_entry(&entry->ddestroy, | |
666 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
667 | kref_get(&nentry->list_kref); |
668 | } | |
ba4e7d97 | 669 | |
85b144f8 ML |
670 | ret = ttm_bo_reserve_locked(entry, false, !remove_all, false, 0); |
671 | if (!ret) | |
672 | ret = ttm_bo_cleanup_refs_and_unlock(entry, false, | |
673 | !remove_all); | |
674 | else | |
675 | spin_unlock(&glob->lru_lock); | |
676 | ||
ba4e7d97 | 677 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
678 | entry = nentry; |
679 | ||
680 | if (ret || !entry) | |
681 | goto out; | |
ba4e7d97 | 682 | |
a987fcaa | 683 | spin_lock(&glob->lru_lock); |
1a961ce0 | 684 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
685 | break; |
686 | } | |
ba4e7d97 | 687 | |
1a961ce0 LB |
688 | out_unlock: |
689 | spin_unlock(&glob->lru_lock); | |
690 | out: | |
691 | if (entry) | |
692 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
693 | return ret; |
694 | } | |
695 | ||
696 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
697 | { | |
698 | struct ttm_bo_device *bdev = | |
699 | container_of(work, struct ttm_bo_device, wq.work); | |
700 | ||
701 | if (ttm_bo_delayed_delete(bdev, false)) { | |
702 | schedule_delayed_work(&bdev->wq, | |
703 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
704 | } | |
705 | } | |
706 | ||
707 | static void ttm_bo_release(struct kref *kref) | |
708 | { | |
709 | struct ttm_buffer_object *bo = | |
710 | container_of(kref, struct ttm_buffer_object, kref); | |
711 | struct ttm_bo_device *bdev = bo->bdev; | |
eba67093 | 712 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
ba4e7d97 | 713 | |
82fe50bc | 714 | write_lock(&bdev->vm_lock); |
ba4e7d97 TH |
715 | if (likely(bo->vm_node != NULL)) { |
716 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
717 | drm_mm_put_block(bo->vm_node); | |
718 | bo->vm_node = NULL; | |
719 | } | |
720 | write_unlock(&bdev->vm_lock); | |
eba67093 TH |
721 | ttm_mem_io_lock(man, false); |
722 | ttm_mem_io_free_vm(bo); | |
723 | ttm_mem_io_unlock(man); | |
e1efc9b6 | 724 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 | 725 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
726 | } |
727 | ||
728 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
729 | { | |
730 | struct ttm_buffer_object *bo = *p_bo; | |
ba4e7d97 TH |
731 | |
732 | *p_bo = NULL; | |
ba4e7d97 | 733 | kref_put(&bo->kref, ttm_bo_release); |
ba4e7d97 TH |
734 | } |
735 | EXPORT_SYMBOL(ttm_bo_unref); | |
736 | ||
7c5ee536 MG |
737 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
738 | { | |
739 | return cancel_delayed_work_sync(&bdev->wq); | |
740 | } | |
741 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
742 | ||
743 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
744 | { | |
745 | if (resched) | |
746 | schedule_delayed_work(&bdev->wq, | |
747 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
748 | } | |
749 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
750 | ||
ca262a99 | 751 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 752 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 753 | { |
ba4e7d97 TH |
754 | struct ttm_bo_device *bdev = bo->bdev; |
755 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
756 | struct ttm_placement placement; |
757 | int ret = 0; | |
ba4e7d97 | 758 | |
702adba2 | 759 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 760 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 761 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 762 | |
78ecf091 | 763 | if (unlikely(ret != 0)) { |
98ffc415 | 764 | if (ret != -ERESTARTSYS) { |
25d0479a | 765 | pr_err("Failed to expire sync object before buffer eviction\n"); |
78ecf091 | 766 | } |
ba4e7d97 TH |
767 | goto out; |
768 | } | |
769 | ||
a9dbfff1 | 770 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ba4e7d97 TH |
771 | |
772 | evict_mem = bo->mem; | |
773 | evict_mem.mm_node = NULL; | |
eba67093 TH |
774 | evict_mem.bus.io_reserved_vm = false; |
775 | evict_mem.bus.io_reserved_count = 0; | |
ba4e7d97 | 776 | |
7cb7d1d7 JG |
777 | placement.fpfn = 0; |
778 | placement.lpfn = 0; | |
779 | placement.num_placement = 0; | |
780 | placement.num_busy_placement = 0; | |
ca262a99 JG |
781 | bdev->driver->evict_flags(bo, &placement); |
782 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 783 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 784 | if (ret) { |
fb53f862 | 785 | if (ret != -ERESTARTSYS) { |
25d0479a JP |
786 | pr_err("Failed to find memory space for buffer 0x%p eviction\n", |
787 | bo); | |
fb53f862 JG |
788 | ttm_bo_mem_space_debug(bo, &placement); |
789 | } | |
ba4e7d97 TH |
790 | goto out; |
791 | } | |
792 | ||
793 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 794 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 795 | if (ret) { |
98ffc415 | 796 | if (ret != -ERESTARTSYS) |
25d0479a | 797 | pr_err("Buffer eviction failed\n"); |
42311ff9 | 798 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
799 | goto out; |
800 | } | |
ca262a99 JG |
801 | bo->evicted = true; |
802 | out: | |
803 | return ret; | |
804 | } | |
805 | ||
806 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
807 | uint32_t mem_type, | |
9d87fa21 JG |
808 | bool interruptible, bool no_wait_reserve, |
809 | bool no_wait_gpu) | |
ca262a99 JG |
810 | { |
811 | struct ttm_bo_global *glob = bdev->glob; | |
812 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
813 | struct ttm_buffer_object *bo; | |
814 | int ret, put_count = 0; | |
ba4e7d97 | 815 | |
9c51ba1d | 816 | retry: |
a987fcaa | 817 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
818 | if (list_empty(&man->lru)) { |
819 | spin_unlock(&glob->lru_lock); | |
820 | return -EBUSY; | |
821 | } | |
822 | ||
ca262a99 JG |
823 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
824 | kref_get(&bo->list_kref); | |
9c51ba1d | 825 | |
e1efc9b6 | 826 | if (!list_empty(&bo->ddestroy)) { |
85b144f8 ML |
827 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait_reserve, false, 0); |
828 | if (!ret) | |
829 | ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible, | |
830 | no_wait_gpu); | |
831 | else | |
832 | spin_unlock(&glob->lru_lock); | |
833 | ||
e1efc9b6 TH |
834 | kref_put(&bo->list_kref, ttm_bo_release_list); |
835 | ||
b8e902f2 | 836 | return ret; |
e1efc9b6 TH |
837 | } |
838 | ||
7bc17a78 | 839 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
9c51ba1d TH |
840 | |
841 | if (unlikely(ret == -EBUSY)) { | |
842 | spin_unlock(&glob->lru_lock); | |
7bc17a78 | 843 | if (likely(!no_wait_reserve)) |
9c51ba1d TH |
844 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
845 | ||
846 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
847 | ||
848 | /** | |
849 | * We *need* to retry after releasing the lru lock. | |
850 | */ | |
851 | ||
852 | if (unlikely(ret != 0)) | |
853 | return ret; | |
854 | goto retry; | |
855 | } | |
856 | ||
857 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 858 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
859 | |
860 | BUG_ON(ret != 0); | |
861 | ||
d6ea8886 | 862 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 863 | |
9d87fa21 | 864 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 865 | ttm_bo_unreserve(bo); |
9c51ba1d | 866 | |
ca262a99 | 867 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
868 | return ret; |
869 | } | |
870 | ||
42311ff9 BS |
871 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
872 | { | |
d961db75 | 873 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 874 | |
d961db75 BS |
875 | if (mem->mm_node) |
876 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
877 | } |
878 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
879 | ||
ba4e7d97 TH |
880 | /** |
881 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
882 | * space, or we've evicted everything and there isn't enough space. | |
883 | */ | |
ca262a99 JG |
884 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
885 | uint32_t mem_type, | |
886 | struct ttm_placement *placement, | |
887 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
888 | bool interruptible, |
889 | bool no_wait_reserve, | |
890 | bool no_wait_gpu) | |
ba4e7d97 | 891 | { |
ca262a99 | 892 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 893 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
894 | int ret; |
895 | ||
ba4e7d97 | 896 | do { |
d961db75 | 897 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
898 | if (unlikely(ret != 0)) |
899 | return ret; | |
d961db75 | 900 | if (mem->mm_node) |
ba4e7d97 | 901 | break; |
ca262a99 | 902 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 903 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
904 | if (unlikely(ret != 0)) |
905 | return ret; | |
ba4e7d97 | 906 | } while (1); |
d961db75 | 907 | if (mem->mm_node == NULL) |
ba4e7d97 | 908 | return -ENOMEM; |
ba4e7d97 TH |
909 | mem->mem_type = mem_type; |
910 | return 0; | |
911 | } | |
912 | ||
ae3e8122 TH |
913 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
914 | uint32_t cur_placement, | |
915 | uint32_t proposed_placement) | |
916 | { | |
917 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
918 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
919 | ||
920 | /** | |
921 | * Keep current caching if possible. | |
922 | */ | |
923 | ||
924 | if ((cur_placement & caching) != 0) | |
925 | result |= (cur_placement & caching); | |
926 | else if ((man->default_caching & caching) != 0) | |
927 | result |= man->default_caching; | |
928 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
929 | result |= TTM_PL_FLAG_CACHED; | |
930 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
931 | result |= TTM_PL_FLAG_WC; | |
932 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
933 | result |= TTM_PL_FLAG_UNCACHED; | |
934 | ||
935 | return result; | |
936 | } | |
937 | ||
ba4e7d97 | 938 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
ba4e7d97 | 939 | uint32_t mem_type, |
ae3e8122 TH |
940 | uint32_t proposed_placement, |
941 | uint32_t *masked_placement) | |
ba4e7d97 TH |
942 | { |
943 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
944 | ||
ae3e8122 | 945 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
946 | return false; |
947 | ||
ae3e8122 | 948 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 949 | return false; |
ba4e7d97 | 950 | |
ae3e8122 TH |
951 | cur_flags |= (proposed_placement & man->available_caching); |
952 | ||
953 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
954 | return true; |
955 | } | |
956 | ||
957 | /** | |
958 | * Creates space for memory region @mem according to its type. | |
959 | * | |
960 | * This function first searches for free space in compatible memory types in | |
961 | * the priority order defined by the driver. If free space isn't found, then | |
962 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
963 | * space. | |
964 | */ | |
965 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
966 | struct ttm_placement *placement, |
967 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
968 | bool interruptible, bool no_wait_reserve, |
969 | bool no_wait_gpu) | |
ba4e7d97 TH |
970 | { |
971 | struct ttm_bo_device *bdev = bo->bdev; | |
972 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
973 | uint32_t mem_type = TTM_PL_SYSTEM; |
974 | uint32_t cur_flags = 0; | |
975 | bool type_found = false; | |
976 | bool type_ok = false; | |
98ffc415 | 977 | bool has_erestartsys = false; |
ca262a99 | 978 | int i, ret; |
ba4e7d97 TH |
979 | |
980 | mem->mm_node = NULL; | |
b6637526 | 981 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
982 | ret = ttm_mem_type_from_flags(placement->placement[i], |
983 | &mem_type); | |
984 | if (ret) | |
985 | return ret; | |
ba4e7d97 TH |
986 | man = &bdev->man[mem_type]; |
987 | ||
988 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
989 | mem_type, |
990 | placement->placement[i], | |
991 | &cur_flags); | |
ba4e7d97 TH |
992 | |
993 | if (!type_ok) | |
994 | continue; | |
995 | ||
ae3e8122 TH |
996 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
997 | cur_flags); | |
ca262a99 JG |
998 | /* |
999 | * Use the access and other non-mapping-related flag bits from | |
1000 | * the memory placement flags to the current flags | |
1001 | */ | |
1002 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
1003 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 1004 | |
ba4e7d97 TH |
1005 | if (mem_type == TTM_PL_SYSTEM) |
1006 | break; | |
1007 | ||
1008 | if (man->has_type && man->use_type) { | |
1009 | type_found = true; | |
d961db75 | 1010 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
1011 | if (unlikely(ret)) |
1012 | return ret; | |
ba4e7d97 | 1013 | } |
d961db75 | 1014 | if (mem->mm_node) |
ba4e7d97 TH |
1015 | break; |
1016 | } | |
1017 | ||
d961db75 | 1018 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
1019 | mem->mem_type = mem_type; |
1020 | mem->placement = cur_flags; | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | if (!type_found) | |
1025 | return -EINVAL; | |
1026 | ||
b6637526 DA |
1027 | for (i = 0; i < placement->num_busy_placement; ++i) { |
1028 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
1029 | &mem_type); |
1030 | if (ret) | |
1031 | return ret; | |
ba4e7d97 | 1032 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1033 | if (!man->has_type) |
1034 | continue; | |
ba4e7d97 | 1035 | if (!ttm_bo_mt_compatible(man, |
ca262a99 | 1036 | mem_type, |
b6637526 | 1037 | placement->busy_placement[i], |
ca262a99 | 1038 | &cur_flags)) |
ba4e7d97 TH |
1039 | continue; |
1040 | ||
ae3e8122 TH |
1041 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1042 | cur_flags); | |
ca262a99 JG |
1043 | /* |
1044 | * Use the access and other non-mapping-related flag bits from | |
1045 | * the memory placement flags to the current flags | |
1046 | */ | |
b6637526 | 1047 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 1048 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1049 | |
0eaddb28 TH |
1050 | |
1051 | if (mem_type == TTM_PL_SYSTEM) { | |
1052 | mem->mem_type = mem_type; | |
1053 | mem->placement = cur_flags; | |
1054 | mem->mm_node = NULL; | |
1055 | return 0; | |
1056 | } | |
1057 | ||
ca262a99 | 1058 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1059 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1060 | if (ret == 0 && mem->mm_node) { |
1061 | mem->placement = cur_flags; | |
1062 | return 0; | |
1063 | } | |
98ffc415 TH |
1064 | if (ret == -ERESTARTSYS) |
1065 | has_erestartsys = true; | |
ba4e7d97 | 1066 | } |
98ffc415 | 1067 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1068 | return ret; |
1069 | } | |
1070 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1071 | ||
ba4e7d97 | 1072 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, |
ca262a99 | 1073 | struct ttm_placement *placement, |
9d87fa21 JG |
1074 | bool interruptible, bool no_wait_reserve, |
1075 | bool no_wait_gpu) | |
ba4e7d97 | 1076 | { |
ba4e7d97 TH |
1077 | int ret = 0; |
1078 | struct ttm_mem_reg mem; | |
702adba2 | 1079 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 1080 | |
a9dbfff1 | 1081 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ba4e7d97 TH |
1082 | |
1083 | /* | |
1084 | * FIXME: It's possible to pipeline buffer moves. | |
1085 | * Have the driver move function wait for idle when necessary, | |
1086 | * instead of doing it here. | |
1087 | */ | |
702adba2 | 1088 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1089 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 1090 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1091 | if (ret) |
1092 | return ret; | |
ba4e7d97 TH |
1093 | mem.num_pages = bo->num_pages; |
1094 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1095 | mem.page_alignment = bo->mem.page_alignment; | |
eba67093 TH |
1096 | mem.bus.io_reserved_vm = false; |
1097 | mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1098 | /* |
1099 | * Determine where to move the buffer. | |
1100 | */ | |
9d87fa21 | 1101 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1102 | if (ret) |
1103 | goto out_unlock; | |
9d87fa21 | 1104 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1105 | out_unlock: |
d961db75 BS |
1106 | if (ret && mem.mm_node) |
1107 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1108 | return ret; |
1109 | } | |
1110 | ||
ca262a99 | 1111 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1112 | struct ttm_mem_reg *mem) |
1113 | { | |
ca262a99 | 1114 | int i; |
e22238ea | 1115 | |
d961db75 BS |
1116 | if (mem->mm_node && placement->lpfn != 0 && |
1117 | (mem->start < placement->fpfn || | |
1118 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1119 | return -1; |
ca262a99 JG |
1120 | |
1121 | for (i = 0; i < placement->num_placement; i++) { | |
1122 | if ((placement->placement[i] & mem->placement & | |
1123 | TTM_PL_MASK_CACHING) && | |
1124 | (placement->placement[i] & mem->placement & | |
1125 | TTM_PL_MASK_MEM)) | |
1126 | return i; | |
1127 | } | |
1128 | return -1; | |
ba4e7d97 TH |
1129 | } |
1130 | ||
09855acb JG |
1131 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1132 | struct ttm_placement *placement, | |
9d87fa21 JG |
1133 | bool interruptible, bool no_wait_reserve, |
1134 | bool no_wait_gpu) | |
ba4e7d97 TH |
1135 | { |
1136 | int ret; | |
1137 | ||
a9dbfff1 | 1138 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ca262a99 JG |
1139 | /* Check that range is valid */ |
1140 | if (placement->lpfn || placement->fpfn) | |
1141 | if (placement->fpfn > placement->lpfn || | |
1142 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1143 | return -EINVAL; | |
ba4e7d97 TH |
1144 | /* |
1145 | * Check whether we need to move buffer. | |
1146 | */ | |
ca262a99 JG |
1147 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1148 | if (ret < 0) { | |
9d87fa21 | 1149 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1150 | if (ret) |
ba4e7d97 | 1151 | return ret; |
ca262a99 JG |
1152 | } else { |
1153 | /* | |
1154 | * Use the access and other non-mapping-related flag bits from | |
1155 | * the compatible memory placement flags to the active flags | |
1156 | */ | |
1157 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1158 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1159 | } |
ba4e7d97 TH |
1160 | /* |
1161 | * We might need to add a TTM. | |
1162 | */ | |
ba4e7d97 TH |
1163 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1164 | ret = ttm_bo_add_ttm(bo, true); | |
1165 | if (ret) | |
1166 | return ret; | |
1167 | } | |
ba4e7d97 TH |
1168 | return 0; |
1169 | } | |
09855acb | 1170 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1171 | |
09855acb JG |
1172 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1173 | struct ttm_placement *placement) | |
ba4e7d97 | 1174 | { |
29e190e0 TH |
1175 | BUG_ON((placement->fpfn || placement->lpfn) && |
1176 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1177 | |
ba4e7d97 TH |
1178 | return 0; |
1179 | } | |
1180 | ||
09855acb JG |
1181 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1182 | struct ttm_buffer_object *bo, | |
1183 | unsigned long size, | |
1184 | enum ttm_bo_type type, | |
1185 | struct ttm_placement *placement, | |
1186 | uint32_t page_alignment, | |
09855acb | 1187 | bool interruptible, |
5df23979 | 1188 | struct file *persistent_swap_storage, |
09855acb | 1189 | size_t acc_size, |
129b78bf | 1190 | struct sg_table *sg, |
09855acb | 1191 | void (*destroy) (struct ttm_buffer_object *)) |
ba4e7d97 | 1192 | { |
09855acb | 1193 | int ret = 0; |
ba4e7d97 | 1194 | unsigned long num_pages; |
57de4ba9 JG |
1195 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
1196 | ||
1197 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); | |
1198 | if (ret) { | |
25d0479a | 1199 | pr_err("Out of kernel memory\n"); |
57de4ba9 JG |
1200 | if (destroy) |
1201 | (*destroy)(bo); | |
1202 | else | |
1203 | kfree(bo); | |
1204 | return -ENOMEM; | |
1205 | } | |
ba4e7d97 | 1206 | |
ba4e7d97 TH |
1207 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; |
1208 | if (num_pages == 0) { | |
25d0479a | 1209 | pr_err("Illegal buffer object size\n"); |
7dfbbdcf TH |
1210 | if (destroy) |
1211 | (*destroy)(bo); | |
1212 | else | |
1213 | kfree(bo); | |
a393c730 | 1214 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1215 | return -EINVAL; |
1216 | } | |
1217 | bo->destroy = destroy; | |
1218 | ||
ba4e7d97 TH |
1219 | kref_init(&bo->kref); |
1220 | kref_init(&bo->list_kref); | |
1221 | atomic_set(&bo->cpu_writers, 0); | |
1222 | atomic_set(&bo->reserved, 1); | |
1223 | init_waitqueue_head(&bo->event_queue); | |
1224 | INIT_LIST_HEAD(&bo->lru); | |
1225 | INIT_LIST_HEAD(&bo->ddestroy); | |
1226 | INIT_LIST_HEAD(&bo->swap); | |
eba67093 | 1227 | INIT_LIST_HEAD(&bo->io_reserve_lru); |
ba4e7d97 | 1228 | bo->bdev = bdev; |
a987fcaa | 1229 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1230 | bo->type = type; |
1231 | bo->num_pages = num_pages; | |
eb6d2c39 | 1232 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1233 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1234 | bo->mem.num_pages = bo->num_pages; | |
1235 | bo->mem.mm_node = NULL; | |
1236 | bo->mem.page_alignment = page_alignment; | |
eba67093 TH |
1237 | bo->mem.bus.io_reserved_vm = false; |
1238 | bo->mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1239 | bo->priv_flags = 0; |
1240 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1241 | bo->seq_valid = false; | |
5df23979 | 1242 | bo->persistent_swap_storage = persistent_swap_storage; |
ba4e7d97 | 1243 | bo->acc_size = acc_size; |
129b78bf | 1244 | bo->sg = sg; |
a987fcaa | 1245 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1246 | |
09855acb | 1247 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1248 | if (unlikely(ret != 0)) |
1249 | goto out_err; | |
1250 | ||
ba4e7d97 TH |
1251 | /* |
1252 | * For ttm_bo_type_device buffers, allocate | |
1253 | * address space from the device. | |
1254 | */ | |
129b78bf DA |
1255 | if (bo->type == ttm_bo_type_device || |
1256 | bo->type == ttm_bo_type_sg) { | |
ba4e7d97 TH |
1257 | ret = ttm_bo_setup_vm(bo); |
1258 | if (ret) | |
1259 | goto out_err; | |
1260 | } | |
1261 | ||
9d87fa21 | 1262 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1263 | if (ret) |
1264 | goto out_err; | |
1265 | ||
1266 | ttm_bo_unreserve(bo); | |
1267 | return 0; | |
1268 | ||
1269 | out_err: | |
1270 | ttm_bo_unreserve(bo); | |
1271 | ttm_bo_unref(&bo); | |
1272 | ||
1273 | return ret; | |
1274 | } | |
09855acb | 1275 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1276 | |
57de4ba9 JG |
1277 | size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, |
1278 | unsigned long bo_size, | |
1279 | unsigned struct_size) | |
ba4e7d97 | 1280 | { |
57de4ba9 JG |
1281 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
1282 | size_t size = 0; | |
ba4e7d97 | 1283 | |
57de4ba9 JG |
1284 | size += ttm_round_pot(struct_size); |
1285 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1286 | size += ttm_round_pot(sizeof(struct ttm_tt)); | |
1287 | return size; | |
ba4e7d97 | 1288 | } |
57de4ba9 JG |
1289 | EXPORT_SYMBOL(ttm_bo_acc_size); |
1290 | ||
1291 | size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, | |
1292 | unsigned long bo_size, | |
1293 | unsigned struct_size) | |
1294 | { | |
1295 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; | |
1296 | size_t size = 0; | |
1297 | ||
1298 | size += ttm_round_pot(struct_size); | |
1299 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1300 | size += PAGE_ALIGN(npages * sizeof(dma_addr_t)); | |
1301 | size += ttm_round_pot(sizeof(struct ttm_dma_tt)); | |
1302 | return size; | |
1303 | } | |
1304 | EXPORT_SYMBOL(ttm_bo_dma_acc_size); | |
ba4e7d97 | 1305 | |
09855acb JG |
1306 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1307 | unsigned long size, | |
1308 | enum ttm_bo_type type, | |
1309 | struct ttm_placement *placement, | |
1310 | uint32_t page_alignment, | |
09855acb | 1311 | bool interruptible, |
5df23979 | 1312 | struct file *persistent_swap_storage, |
09855acb | 1313 | struct ttm_buffer_object **p_bo) |
ba4e7d97 TH |
1314 | { |
1315 | struct ttm_buffer_object *bo; | |
57de4ba9 | 1316 | size_t acc_size; |
ca262a99 | 1317 | int ret; |
ba4e7d97 | 1318 | |
ba4e7d97 | 1319 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
a393c730 | 1320 | if (unlikely(bo == NULL)) |
ba4e7d97 | 1321 | return -ENOMEM; |
ba4e7d97 | 1322 | |
a393c730 | 1323 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); |
09855acb | 1324 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
0b91c4a1 MS |
1325 | interruptible, persistent_swap_storage, acc_size, |
1326 | NULL, NULL); | |
ba4e7d97 TH |
1327 | if (likely(ret == 0)) |
1328 | *p_bo = bo; | |
1329 | ||
1330 | return ret; | |
1331 | } | |
4d798937 | 1332 | EXPORT_SYMBOL(ttm_bo_create); |
ba4e7d97 | 1333 | |
ba4e7d97 | 1334 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1335 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1336 | { |
ca262a99 | 1337 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1338 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1339 | int ret; |
ba4e7d97 TH |
1340 | |
1341 | /* | |
1342 | * Can't use standard list traversal since we're unlocking. | |
1343 | */ | |
1344 | ||
a987fcaa | 1345 | spin_lock(&glob->lru_lock); |
ca262a99 | 1346 | while (!list_empty(&man->lru)) { |
a987fcaa | 1347 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1348 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1349 | if (ret) { |
1350 | if (allow_errors) { | |
1351 | return ret; | |
1352 | } else { | |
25d0479a | 1353 | pr_err("Cleanup eviction failed\n"); |
ca262a99 JG |
1354 | } |
1355 | } | |
a987fcaa | 1356 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1357 | } |
a987fcaa | 1358 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1359 | return 0; |
1360 | } | |
1361 | ||
1362 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1363 | { | |
c96e7c7a | 1364 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1365 | int ret = -EINVAL; |
1366 | ||
1367 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
25d0479a | 1368 | pr_err("Illegal memory type %d\n", mem_type); |
ba4e7d97 TH |
1369 | return ret; |
1370 | } | |
c96e7c7a | 1371 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1372 | |
1373 | if (!man->has_type) { | |
25d0479a JP |
1374 | pr_err("Trying to take down uninitialized memory manager type %u\n", |
1375 | mem_type); | |
ba4e7d97 TH |
1376 | return ret; |
1377 | } | |
1378 | ||
1379 | man->use_type = false; | |
1380 | man->has_type = false; | |
1381 | ||
1382 | ret = 0; | |
1383 | if (mem_type > 0) { | |
ca262a99 | 1384 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1385 | |
d961db75 | 1386 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1387 | } |
1388 | ||
1389 | return ret; | |
1390 | } | |
1391 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1392 | ||
1393 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1394 | { | |
1395 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1396 | ||
1397 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
25d0479a | 1398 | pr_err("Illegal memory manager memory type %u\n", mem_type); |
ba4e7d97 TH |
1399 | return -EINVAL; |
1400 | } | |
1401 | ||
1402 | if (!man->has_type) { | |
25d0479a | 1403 | pr_err("Memory type %u has not been initialized\n", mem_type); |
ba4e7d97 TH |
1404 | return 0; |
1405 | } | |
1406 | ||
ca262a99 | 1407 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1408 | } |
1409 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1410 | ||
1411 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1412 | unsigned long p_size) |
ba4e7d97 TH |
1413 | { |
1414 | int ret = -EINVAL; | |
1415 | struct ttm_mem_type_manager *man; | |
1416 | ||
dbc4a5b8 | 1417 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1418 | man = &bdev->man[type]; |
dbc4a5b8 | 1419 | BUG_ON(man->has_type); |
eba67093 TH |
1420 | man->io_reserve_fastpath = true; |
1421 | man->use_io_reserve_lru = false; | |
1422 | mutex_init(&man->io_reserve_mutex); | |
1423 | INIT_LIST_HEAD(&man->io_reserve_lru); | |
ba4e7d97 TH |
1424 | |
1425 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1426 | if (ret) | |
1427 | return ret; | |
d961db75 | 1428 | man->bdev = bdev; |
ba4e7d97 TH |
1429 | |
1430 | ret = 0; | |
1431 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1432 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1433 | if (ret) |
1434 | return ret; | |
1435 | } | |
1436 | man->has_type = true; | |
1437 | man->use_type = true; | |
1438 | man->size = p_size; | |
1439 | ||
1440 | INIT_LIST_HEAD(&man->lru); | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1445 | ||
a987fcaa TH |
1446 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1447 | { | |
1448 | struct ttm_bo_global *glob = | |
1449 | container_of(kobj, struct ttm_bo_global, kobj); | |
1450 | ||
a987fcaa TH |
1451 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1452 | __free_page(glob->dummy_read_page); | |
1453 | kfree(glob); | |
1454 | } | |
1455 | ||
ba4420c2 | 1456 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1457 | { |
1458 | struct ttm_bo_global *glob = ref->object; | |
1459 | ||
1460 | kobject_del(&glob->kobj); | |
1461 | kobject_put(&glob->kobj); | |
1462 | } | |
1463 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1464 | ||
ba4420c2 | 1465 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1466 | { |
1467 | struct ttm_bo_global_ref *bo_ref = | |
1468 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1469 | struct ttm_bo_global *glob = ref->object; | |
1470 | int ret; | |
1471 | ||
1472 | mutex_init(&glob->device_list_mutex); | |
1473 | spin_lock_init(&glob->lru_lock); | |
1474 | glob->mem_glob = bo_ref->mem_glob; | |
1475 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1476 | ||
1477 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1478 | ret = -ENOMEM; | |
1479 | goto out_no_drp; | |
1480 | } | |
1481 | ||
1482 | INIT_LIST_HEAD(&glob->swap_lru); | |
1483 | INIT_LIST_HEAD(&glob->device_list); | |
1484 | ||
1485 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1486 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1487 | if (unlikely(ret != 0)) { | |
25d0479a | 1488 | pr_err("Could not register buffer object swapout\n"); |
a987fcaa TH |
1489 | goto out_no_shrink; |
1490 | } | |
1491 | ||
a987fcaa TH |
1492 | atomic_set(&glob->bo_count, 0); |
1493 | ||
b642ed06 RD |
1494 | ret = kobject_init_and_add( |
1495 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1496 | if (unlikely(ret != 0)) |
1497 | kobject_put(&glob->kobj); | |
1498 | return ret; | |
1499 | out_no_shrink: | |
1500 | __free_page(glob->dummy_read_page); | |
1501 | out_no_drp: | |
1502 | kfree(glob); | |
1503 | return ret; | |
1504 | } | |
1505 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1506 | ||
1507 | ||
ba4e7d97 TH |
1508 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1509 | { | |
1510 | int ret = 0; | |
1511 | unsigned i = TTM_NUM_MEM_TYPES; | |
1512 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1513 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1514 | |
1515 | while (i--) { | |
1516 | man = &bdev->man[i]; | |
1517 | if (man->has_type) { | |
1518 | man->use_type = false; | |
1519 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1520 | ret = -EBUSY; | |
25d0479a JP |
1521 | pr_err("DRM memory manager type %d is not clean\n", |
1522 | i); | |
ba4e7d97 TH |
1523 | } |
1524 | man->has_type = false; | |
1525 | } | |
1526 | } | |
1527 | ||
a987fcaa TH |
1528 | mutex_lock(&glob->device_list_mutex); |
1529 | list_del(&bdev->device_list); | |
1530 | mutex_unlock(&glob->device_list_mutex); | |
1531 | ||
f094cfc6 | 1532 | cancel_delayed_work_sync(&bdev->wq); |
ba4e7d97 TH |
1533 | |
1534 | while (ttm_bo_delayed_delete(bdev, true)) | |
1535 | ; | |
1536 | ||
a987fcaa | 1537 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1538 | if (list_empty(&bdev->ddestroy)) |
1539 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1540 | ||
1541 | if (list_empty(&bdev->man[0].lru)) | |
1542 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1543 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1544 | |
ba4e7d97 TH |
1545 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1546 | write_lock(&bdev->vm_lock); | |
1547 | drm_mm_takedown(&bdev->addr_space_mm); | |
1548 | write_unlock(&bdev->vm_lock); | |
1549 | ||
ba4e7d97 TH |
1550 | return ret; |
1551 | } | |
1552 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1553 | ||
ba4e7d97 | 1554 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1555 | struct ttm_bo_global *glob, |
1556 | struct ttm_bo_driver *driver, | |
51c8b407 | 1557 | uint64_t file_page_offset, |
ad49f501 | 1558 | bool need_dma32) |
ba4e7d97 TH |
1559 | { |
1560 | int ret = -EINVAL; | |
1561 | ||
ba4e7d97 | 1562 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1563 | bdev->driver = driver; |
ba4e7d97 TH |
1564 | |
1565 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1566 | ||
ba4e7d97 TH |
1567 | /* |
1568 | * Initialize the system memory buffer type. | |
1569 | * Other types need to be driver / IOCTL initialized. | |
1570 | */ | |
ca262a99 | 1571 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1572 | if (unlikely(ret != 0)) |
a987fcaa | 1573 | goto out_no_sys; |
ba4e7d97 TH |
1574 | |
1575 | bdev->addr_space_rb = RB_ROOT; | |
1576 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1577 | if (unlikely(ret != 0)) | |
a987fcaa | 1578 | goto out_no_addr_mm; |
ba4e7d97 TH |
1579 | |
1580 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
ba4e7d97 | 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 | 1723 | void *sync_obj; |
ba4e7d97 TH |
1724 | int ret = 0; |
1725 | ||
1717c0e2 | 1726 | if (likely(bo->sync_obj == NULL)) |
ba4e7d97 TH |
1727 | return 0; |
1728 | ||
1717c0e2 | 1729 | while (bo->sync_obj) { |
ba4e7d97 | 1730 | |
dedfdffd | 1731 | if (driver->sync_obj_signaled(bo->sync_obj)) { |
1717c0e2 DA |
1732 | void *tmp_obj = bo->sync_obj; |
1733 | bo->sync_obj = NULL; | |
1734 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1735 | spin_unlock(&bdev->fence_lock); | |
1736 | driver->sync_obj_unref(&tmp_obj); | |
1737 | spin_lock(&bdev->fence_lock); | |
ba4e7d97 TH |
1738 | continue; |
1739 | } | |
1740 | ||
1741 | if (no_wait) | |
1742 | return -EBUSY; | |
1743 | ||
1717c0e2 | 1744 | sync_obj = driver->sync_obj_ref(bo->sync_obj); |
702adba2 | 1745 | spin_unlock(&bdev->fence_lock); |
dedfdffd | 1746 | ret = driver->sync_obj_wait(sync_obj, |
ba4e7d97 TH |
1747 | lazy, interruptible); |
1748 | if (unlikely(ret != 0)) { | |
1749 | driver->sync_obj_unref(&sync_obj); | |
702adba2 | 1750 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1751 | return ret; |
1752 | } | |
702adba2 | 1753 | spin_lock(&bdev->fence_lock); |
5fb4ef0e | 1754 | if (likely(bo->sync_obj == sync_obj)) { |
1717c0e2 DA |
1755 | void *tmp_obj = bo->sync_obj; |
1756 | bo->sync_obj = NULL; | |
1757 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1758 | &bo->priv_flags); | |
1759 | spin_unlock(&bdev->fence_lock); | |
1760 | driver->sync_obj_unref(&sync_obj); | |
1761 | driver->sync_obj_unref(&tmp_obj); | |
1762 | spin_lock(&bdev->fence_lock); | |
fee280d3 | 1763 | } else { |
702adba2 | 1764 | spin_unlock(&bdev->fence_lock); |
fee280d3 | 1765 | driver->sync_obj_unref(&sync_obj); |
702adba2 | 1766 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1767 | } |
1768 | } | |
1769 | return 0; | |
1770 | } | |
1771 | EXPORT_SYMBOL(ttm_bo_wait); | |
1772 | ||
ba4e7d97 TH |
1773 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1774 | { | |
702adba2 | 1775 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1776 | int ret = 0; |
1777 | ||
1778 | /* | |
8cfe92d6 | 1779 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1780 | */ |
1781 | ||
1782 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1783 | if (unlikely(ret != 0)) | |
1784 | return ret; | |
702adba2 | 1785 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1786 | ret = ttm_bo_wait(bo, false, true, no_wait); |
702adba2 | 1787 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1788 | if (likely(ret == 0)) |
1789 | atomic_inc(&bo->cpu_writers); | |
1790 | ttm_bo_unreserve(bo); | |
1791 | return ret; | |
1792 | } | |
d1ede145 | 1793 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1794 | |
1795 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1796 | { | |
654aa792 | 1797 | atomic_dec(&bo->cpu_writers); |
ba4e7d97 | 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 | 1826 | if (!list_empty(&bo->ddestroy)) { |
85b144f8 ML |
1827 | ttm_bo_reserve_locked(bo, false, false, false, 0); |
1828 | ttm_bo_cleanup_refs_and_unlock(bo, false, false); | |
1829 | ||
e1efc9b6 | 1830 | kref_put(&bo->list_kref, ttm_bo_release_list); |
a8ff3ee2 | 1831 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
1832 | continue; |
1833 | } | |
1834 | ||
ba4e7d97 TH |
1835 | /** |
1836 | * Reserve buffer. Since we unlock while sleeping, we need | |
1837 | * to re-check that nobody removed us from the swap-list while | |
1838 | * we slept. | |
1839 | */ | |
1840 | ||
1841 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1842 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1843 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1844 | ttm_bo_wait_unreserved(bo, false); |
1845 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1846 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1847 | } |
1848 | } | |
1849 | ||
1850 | BUG_ON(ret != 0); | |
1851 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1852 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1853 | |
d6ea8886 | 1854 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
1855 | |
1856 | /** | |
1857 | * Wait for GPU, then move to system cached. | |
1858 | */ | |
1859 | ||
702adba2 | 1860 | spin_lock(&bo->bdev->fence_lock); |
1717c0e2 | 1861 | ret = ttm_bo_wait(bo, false, false, false); |
702adba2 | 1862 | spin_unlock(&bo->bdev->fence_lock); |
ba4e7d97 TH |
1863 | |
1864 | if (unlikely(ret != 0)) | |
1865 | goto out; | |
1866 | ||
1867 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1868 | struct ttm_mem_reg evict_mem; | |
1869 | ||
1870 | evict_mem = bo->mem; | |
1871 | evict_mem.mm_node = NULL; | |
1872 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1873 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1874 | ||
1875 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1876 | false, false, false); |
ba4e7d97 TH |
1877 | if (unlikely(ret != 0)) |
1878 | goto out; | |
1879 | } | |
1880 | ||
1881 | ttm_bo_unmap_virtual(bo); | |
1882 | ||
1883 | /** | |
1884 | * Swap out. Buffer will be swapped in again as soon as | |
1885 | * anyone tries to access a ttm page. | |
1886 | */ | |
1887 | ||
3f09ea4e TH |
1888 | if (bo->bdev->driver->swap_notify) |
1889 | bo->bdev->driver->swap_notify(bo); | |
1890 | ||
5df23979 | 1891 | ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); |
ba4e7d97 TH |
1892 | out: |
1893 | ||
1894 | /** | |
1895 | * | |
1896 | * Unreserve without putting on LRU to avoid swapping out an | |
1897 | * already swapped buffer. | |
1898 | */ | |
1899 | ||
1900 | atomic_set(&bo->reserved, 0); | |
1901 | wake_up_all(&bo->event_queue); | |
1902 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1903 | return ret; | |
1904 | } | |
1905 | ||
1906 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1907 | { | |
a987fcaa | 1908 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1909 | ; |
1910 | } | |
e99e1e78 | 1911 | EXPORT_SYMBOL(ttm_bo_swapout_all); |