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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 | ||
cc4c0c4d ML |
161 | static int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, |
162 | bool interruptible) | |
ba4e7d97 | 163 | { |
ba4e7d97 | 164 | if (interruptible) { |
965d3807 | 165 | return wait_event_interruptible(bo->event_queue, |
a9dbfff1 | 166 | !ttm_bo_is_reserved(bo)); |
ba4e7d97 | 167 | } else { |
a9dbfff1 | 168 | wait_event(bo->event_queue, !ttm_bo_is_reserved(bo)); |
965d3807 | 169 | return 0; |
ba4e7d97 | 170 | } |
ba4e7d97 TH |
171 | } |
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 | ||
63d0a419 | 216 | int ttm_bo_reserve_nolru(struct ttm_buffer_object *bo, |
ba4e7d97 TH |
217 | bool interruptible, |
218 | bool no_wait, bool use_sequence, uint32_t sequence) | |
219 | { | |
ba4e7d97 TH |
220 | int ret; |
221 | ||
63d0a419 | 222 | while (unlikely(atomic_xchg(&bo->reserved, 1) != 0)) { |
95ccb0f3 TH |
223 | /** |
224 | * Deadlock avoidance for multi-bo reserving. | |
225 | */ | |
96726fe5 TH |
226 | if (use_sequence && bo->seq_valid) { |
227 | /** | |
228 | * We've already reserved this one. | |
229 | */ | |
230 | if (unlikely(sequence == bo->val_seq)) | |
231 | return -EDEADLK; | |
232 | /** | |
233 | * Already reserved by a thread that will not back | |
234 | * off for us. We need to back off. | |
235 | */ | |
236 | if (unlikely(sequence - bo->val_seq < (1 << 31))) | |
237 | return -EAGAIN; | |
ba4e7d97 TH |
238 | } |
239 | ||
240 | if (no_wait) | |
241 | return -EBUSY; | |
242 | ||
ba4e7d97 | 243 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
ba4e7d97 TH |
244 | |
245 | if (unlikely(ret)) | |
246 | return ret; | |
247 | } | |
248 | ||
249 | if (use_sequence) { | |
63d0a419 | 250 | bool wake_up = false; |
95ccb0f3 TH |
251 | /** |
252 | * Wake up waiters that may need to recheck for deadlock, | |
253 | * if we decreased the sequence number. | |
254 | */ | |
255 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
256 | || !bo->seq_valid)) | |
63d0a419 | 257 | wake_up = true; |
95ccb0f3 | 258 | |
63d0a419 ML |
259 | /* |
260 | * In the worst case with memory ordering these values can be | |
261 | * seen in the wrong order. However since we call wake_up_all | |
262 | * in that case, this will hopefully not pose a problem, | |
263 | * and the worst case would only cause someone to accidentally | |
264 | * hit -EAGAIN in ttm_bo_reserve when they see old value of | |
265 | * val_seq. However this would only happen if seq_valid was | |
266 | * written before val_seq was, and just means some slightly | |
267 | * increased cpu usage | |
268 | */ | |
ba4e7d97 TH |
269 | bo->val_seq = sequence; |
270 | bo->seq_valid = true; | |
63d0a419 ML |
271 | if (wake_up) |
272 | wake_up_all(&bo->event_queue); | |
ba4e7d97 TH |
273 | } else { |
274 | bo->seq_valid = false; | |
275 | } | |
276 | ||
277 | return 0; | |
278 | } | |
279 | EXPORT_SYMBOL(ttm_bo_reserve); | |
280 | ||
281 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
282 | { | |
283 | BUG(); | |
284 | } | |
285 | ||
d6ea8886 DA |
286 | void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
287 | bool never_free) | |
288 | { | |
2357cbe5 TH |
289 | kref_sub(&bo->list_kref, count, |
290 | (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list); | |
d6ea8886 DA |
291 | } |
292 | ||
ba4e7d97 TH |
293 | int ttm_bo_reserve(struct ttm_buffer_object *bo, |
294 | bool interruptible, | |
295 | bool no_wait, bool use_sequence, uint32_t sequence) | |
296 | { | |
a987fcaa | 297 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
298 | int put_count = 0; |
299 | int ret; | |
300 | ||
63d0a419 ML |
301 | ret = ttm_bo_reserve_nolru(bo, interruptible, no_wait, use_sequence, |
302 | sequence); | |
303 | if (likely(ret == 0)) { | |
304 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 305 | put_count = ttm_bo_del_from_lru(bo); |
63d0a419 ML |
306 | spin_unlock(&glob->lru_lock); |
307 | ttm_bo_list_ref_sub(bo, put_count, true); | |
308 | } | |
ba4e7d97 | 309 | |
ba4e7d97 TH |
310 | return ret; |
311 | } | |
312 | ||
5e45d7df ML |
313 | int ttm_bo_reserve_slowpath_nolru(struct ttm_buffer_object *bo, |
314 | bool interruptible, uint32_t sequence) | |
315 | { | |
316 | bool wake_up = false; | |
317 | int ret; | |
318 | ||
319 | while (unlikely(atomic_xchg(&bo->reserved, 1) != 0)) { | |
320 | WARN_ON(bo->seq_valid && sequence == bo->val_seq); | |
321 | ||
322 | ret = ttm_bo_wait_unreserved(bo, interruptible); | |
ba4e7d97 | 323 | |
5e45d7df ML |
324 | if (unlikely(ret)) |
325 | return ret; | |
326 | } | |
327 | ||
328 | if ((bo->val_seq - sequence < (1 << 31)) || !bo->seq_valid) | |
329 | wake_up = true; | |
330 | ||
331 | /** | |
332 | * Wake up waiters that may need to recheck for deadlock, | |
333 | * if we decreased the sequence number. | |
334 | */ | |
335 | bo->val_seq = sequence; | |
336 | bo->seq_valid = true; | |
337 | if (wake_up) | |
338 | wake_up_all(&bo->event_queue); | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo, | |
344 | bool interruptible, uint32_t sequence) | |
345 | { | |
346 | struct ttm_bo_global *glob = bo->glob; | |
347 | int put_count, ret; | |
348 | ||
349 | ret = ttm_bo_reserve_slowpath_nolru(bo, interruptible, sequence); | |
350 | if (likely(!ret)) { | |
351 | spin_lock(&glob->lru_lock); | |
352 | put_count = ttm_bo_del_from_lru(bo); | |
353 | spin_unlock(&glob->lru_lock); | |
354 | ttm_bo_list_ref_sub(bo, put_count, true); | |
355 | } | |
ba4e7d97 TH |
356 | return ret; |
357 | } | |
5e45d7df | 358 | EXPORT_SYMBOL(ttm_bo_reserve_slowpath); |
ba4e7d97 | 359 | |
95762c2b TH |
360 | void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo) |
361 | { | |
362 | ttm_bo_add_to_lru(bo); | |
363 | atomic_set(&bo->reserved, 0); | |
364 | wake_up_all(&bo->event_queue); | |
365 | } | |
366 | ||
ba4e7d97 TH |
367 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) |
368 | { | |
a987fcaa | 369 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 370 | |
a987fcaa | 371 | spin_lock(&glob->lru_lock); |
95762c2b | 372 | ttm_bo_unreserve_locked(bo); |
a987fcaa | 373 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
374 | } |
375 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
376 | ||
377 | /* | |
378 | * Call bo->mutex locked. | |
379 | */ | |
ba4e7d97 TH |
380 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
381 | { | |
382 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 383 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
384 | int ret = 0; |
385 | uint32_t page_flags = 0; | |
386 | ||
387 | TTM_ASSERT_LOCKED(&bo->mutex); | |
388 | bo->ttm = NULL; | |
389 | ||
ad49f501 DA |
390 | if (bdev->need_dma32) |
391 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
392 | ||
ba4e7d97 TH |
393 | switch (bo->type) { |
394 | case ttm_bo_type_device: | |
395 | if (zero_alloc) | |
396 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
397 | case ttm_bo_type_kernel: | |
649bf3ca JG |
398 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, |
399 | page_flags, glob->dummy_read_page); | |
ba4e7d97 TH |
400 | if (unlikely(bo->ttm == NULL)) |
401 | ret = -ENOMEM; | |
402 | break; | |
129b78bf DA |
403 | case ttm_bo_type_sg: |
404 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
405 | page_flags | TTM_PAGE_FLAG_SG, | |
406 | glob->dummy_read_page); | |
407 | if (unlikely(bo->ttm == NULL)) { | |
408 | ret = -ENOMEM; | |
409 | break; | |
410 | } | |
411 | bo->ttm->sg = bo->sg; | |
412 | break; | |
ba4e7d97 | 413 | default: |
25d0479a | 414 | pr_err("Illegal buffer object type\n"); |
ba4e7d97 TH |
415 | ret = -EINVAL; |
416 | break; | |
417 | } | |
418 | ||
419 | return ret; | |
420 | } | |
421 | ||
422 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
423 | struct ttm_mem_reg *mem, | |
9d87fa21 | 424 | bool evict, bool interruptible, |
97a875cb | 425 | bool no_wait_gpu) |
ba4e7d97 TH |
426 | { |
427 | struct ttm_bo_device *bdev = bo->bdev; | |
428 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
429 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
430 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
431 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
432 | int ret = 0; | |
433 | ||
434 | if (old_is_pci || new_is_pci || | |
eba67093 TH |
435 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { |
436 | ret = ttm_mem_io_lock(old_man, true); | |
437 | if (unlikely(ret != 0)) | |
438 | goto out_err; | |
439 | ttm_bo_unmap_virtual_locked(bo); | |
440 | ttm_mem_io_unlock(old_man); | |
441 | } | |
ba4e7d97 TH |
442 | |
443 | /* | |
444 | * Create and bind a ttm if required. | |
445 | */ | |
446 | ||
8d3bb236 BS |
447 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
448 | if (bo->ttm == NULL) { | |
ff02b13f BS |
449 | bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); |
450 | ret = ttm_bo_add_ttm(bo, zero); | |
8d3bb236 BS |
451 | if (ret) |
452 | goto out_err; | |
453 | } | |
ba4e7d97 TH |
454 | |
455 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
456 | if (ret) | |
87ef9209 | 457 | goto out_err; |
ba4e7d97 TH |
458 | |
459 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
460 | ret = ttm_tt_bind(bo->ttm, mem); | |
461 | if (ret) | |
462 | goto out_err; | |
463 | } | |
464 | ||
465 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
82ef594e BS |
466 | if (bdev->driver->move_notify) |
467 | bdev->driver->move_notify(bo, mem); | |
ca262a99 | 468 | bo->mem = *mem; |
ba4e7d97 | 469 | mem->mm_node = NULL; |
ba4e7d97 TH |
470 | goto moved; |
471 | } | |
ba4e7d97 TH |
472 | } |
473 | ||
9f1feed2 BS |
474 | if (bdev->driver->move_notify) |
475 | bdev->driver->move_notify(bo, mem); | |
476 | ||
ba4e7d97 TH |
477 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
478 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
97a875cb | 479 | ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem); |
ba4e7d97 TH |
480 | else if (bdev->driver->move) |
481 | ret = bdev->driver->move(bo, evict, interruptible, | |
97a875cb | 482 | no_wait_gpu, mem); |
ba4e7d97 | 483 | else |
97a875cb | 484 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem); |
ba4e7d97 | 485 | |
9f1feed2 BS |
486 | if (ret) { |
487 | if (bdev->driver->move_notify) { | |
488 | struct ttm_mem_reg tmp_mem = *mem; | |
489 | *mem = bo->mem; | |
490 | bo->mem = tmp_mem; | |
491 | bdev->driver->move_notify(bo, mem); | |
492 | bo->mem = *mem; | |
014b3440 | 493 | *mem = tmp_mem; |
9f1feed2 | 494 | } |
ba4e7d97 | 495 | |
9f1feed2 BS |
496 | goto out_err; |
497 | } | |
dc97b340 | 498 | |
ba4e7d97 TH |
499 | moved: |
500 | if (bo->evicted) { | |
501 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
502 | if (ret) | |
25d0479a | 503 | pr_err("Can not flush read caches\n"); |
ba4e7d97 TH |
504 | bo->evicted = false; |
505 | } | |
506 | ||
507 | if (bo->mem.mm_node) { | |
d961db75 | 508 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
509 | bdev->man[bo->mem.mem_type].gpu_offset; |
510 | bo->cur_placement = bo->mem.placement; | |
354fb52c TH |
511 | } else |
512 | bo->offset = 0; | |
ba4e7d97 TH |
513 | |
514 | return 0; | |
515 | ||
516 | out_err: | |
517 | new_man = &bdev->man[bo->mem.mem_type]; | |
518 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
519 | ttm_tt_unbind(bo->ttm); | |
520 | ttm_tt_destroy(bo->ttm); | |
521 | bo->ttm = NULL; | |
522 | } | |
523 | ||
524 | return ret; | |
525 | } | |
526 | ||
1df6a2eb | 527 | /** |
40d857bb | 528 | * Call bo::reserved. |
1df6a2eb | 529 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
530 | * This is the place to put in driver specific hooks to release |
531 | * driver private resources. | |
532 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
533 | */ |
534 | ||
535 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
536 | { | |
dc97b340 JG |
537 | if (bo->bdev->driver->move_notify) |
538 | bo->bdev->driver->move_notify(bo, NULL); | |
539 | ||
1df6a2eb | 540 | if (bo->ttm) { |
1df6a2eb TH |
541 | ttm_tt_unbind(bo->ttm); |
542 | ttm_tt_destroy(bo->ttm); | |
543 | bo->ttm = NULL; | |
1df6a2eb | 544 | } |
40d857bb | 545 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
546 | |
547 | atomic_set(&bo->reserved, 0); | |
85b144f8 | 548 | wake_up_all(&bo->event_queue); |
06fba6d4 TH |
549 | |
550 | /* | |
85b144f8 ML |
551 | * Since the final reference to this bo may not be dropped by |
552 | * the current task we have to put a memory barrier here to make | |
553 | * sure the changes done in this function are always visible. | |
554 | * | |
555 | * This function only needs protection against the final kref_put. | |
06fba6d4 | 556 | */ |
85b144f8 | 557 | smp_mb__before_atomic_dec(); |
1df6a2eb TH |
558 | } |
559 | ||
e1efc9b6 | 560 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
561 | { |
562 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 563 | struct ttm_bo_global *glob = bo->glob; |
4154f051 | 564 | struct ttm_bo_driver *driver = bdev->driver; |
aa123268 | 565 | void *sync_obj = NULL; |
e1efc9b6 | 566 | int put_count; |
ba4e7d97 TH |
567 | int ret; |
568 | ||
4154f051 | 569 | spin_lock(&glob->lru_lock); |
63d0a419 | 570 | ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
4154f051 | 571 | |
702adba2 | 572 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 573 | (void) ttm_bo_wait(bo, false, false, true); |
4154f051 | 574 | if (!ret && !bo->sync_obj) { |
702adba2 | 575 | spin_unlock(&bdev->fence_lock); |
1df6a2eb | 576 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 577 | |
40d857bb | 578 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 579 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 580 | |
d6ea8886 | 581 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 582 | |
e1efc9b6 | 583 | return; |
ba4e7d97 | 584 | } |
aa123268 TH |
585 | if (bo->sync_obj) |
586 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
4154f051 ML |
587 | spin_unlock(&bdev->fence_lock); |
588 | ||
589 | if (!ret) { | |
590 | atomic_set(&bo->reserved, 0); | |
591 | wake_up_all(&bo->event_queue); | |
592 | } | |
e1efc9b6 TH |
593 | |
594 | kref_get(&bo->list_kref); | |
595 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
596 | spin_unlock(&glob->lru_lock); | |
e1efc9b6 | 597 | |
aa123268 | 598 | if (sync_obj) { |
dedfdffd | 599 | driver->sync_obj_flush(sync_obj); |
aa123268 TH |
600 | driver->sync_obj_unref(&sync_obj); |
601 | } | |
e1efc9b6 TH |
602 | schedule_delayed_work(&bdev->wq, |
603 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
604 | } | |
605 | ||
606 | /** | |
85b144f8 | 607 | * function ttm_bo_cleanup_refs_and_unlock |
e1efc9b6 TH |
608 | * If bo idle, remove from delayed- and lru lists, and unref. |
609 | * If not idle, do nothing. | |
610 | * | |
85b144f8 ML |
611 | * Must be called with lru_lock and reservation held, this function |
612 | * will drop both before returning. | |
613 | * | |
e1efc9b6 | 614 | * @interruptible Any sleeps should occur interruptibly. |
e1efc9b6 TH |
615 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. |
616 | */ | |
617 | ||
85b144f8 ML |
618 | static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, |
619 | bool interruptible, | |
620 | bool no_wait_gpu) | |
e1efc9b6 | 621 | { |
702adba2 | 622 | struct ttm_bo_device *bdev = bo->bdev; |
85b144f8 | 623 | struct ttm_bo_driver *driver = bdev->driver; |
e1efc9b6 TH |
624 | struct ttm_bo_global *glob = bo->glob; |
625 | int put_count; | |
85b144f8 | 626 | int ret; |
e1efc9b6 | 627 | |
702adba2 | 628 | spin_lock(&bdev->fence_lock); |
85b144f8 | 629 | ret = ttm_bo_wait(bo, false, false, true); |
e1efc9b6 | 630 | |
85b144f8 ML |
631 | if (ret && !no_wait_gpu) { |
632 | void *sync_obj; | |
e1efc9b6 | 633 | |
85b144f8 ML |
634 | /* |
635 | * Take a reference to the fence and unreserve, | |
636 | * at this point the buffer should be dead, so | |
637 | * no new sync objects can be attached. | |
638 | */ | |
0953e76e | 639 | sync_obj = driver->sync_obj_ref(bo->sync_obj); |
85b144f8 | 640 | spin_unlock(&bdev->fence_lock); |
26cc40a8 | 641 | |
85b144f8 ML |
642 | atomic_set(&bo->reserved, 0); |
643 | wake_up_all(&bo->event_queue); | |
26cc40a8 | 644 | spin_unlock(&glob->lru_lock); |
26cc40a8 | 645 | |
85b144f8 ML |
646 | ret = driver->sync_obj_wait(sync_obj, false, interruptible); |
647 | driver->sync_obj_unref(&sync_obj); | |
648 | if (ret) | |
b8e902f2 TH |
649 | return ret; |
650 | ||
85b144f8 ML |
651 | /* |
652 | * remove sync_obj with ttm_bo_wait, the wait should be | |
653 | * finished, and no new wait object should have been added. | |
654 | */ | |
655 | spin_lock(&bdev->fence_lock); | |
656 | ret = ttm_bo_wait(bo, false, false, true); | |
657 | WARN_ON(ret); | |
658 | spin_unlock(&bdev->fence_lock); | |
659 | if (ret) | |
660 | return ret; | |
ba4e7d97 | 661 | |
85b144f8 | 662 | spin_lock(&glob->lru_lock); |
63d0a419 | 663 | ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
b8e902f2 | 664 | |
85b144f8 ML |
665 | /* |
666 | * We raced, and lost, someone else holds the reservation now, | |
667 | * and is probably busy in ttm_bo_cleanup_memtype_use. | |
668 | * | |
669 | * Even if it's not the case, because we finished waiting any | |
670 | * delayed destruction would succeed, so just return success | |
671 | * here. | |
672 | */ | |
673 | if (ret) { | |
674 | spin_unlock(&glob->lru_lock); | |
675 | return 0; | |
676 | } | |
677 | } else | |
678 | spin_unlock(&bdev->fence_lock); | |
ba4e7d97 | 679 | |
85b144f8 | 680 | if (ret || unlikely(list_empty(&bo->ddestroy))) { |
e1efc9b6 TH |
681 | atomic_set(&bo->reserved, 0); |
682 | wake_up_all(&bo->event_queue); | |
a987fcaa | 683 | spin_unlock(&glob->lru_lock); |
85b144f8 | 684 | return ret; |
ba4e7d97 TH |
685 | } |
686 | ||
e1efc9b6 TH |
687 | put_count = ttm_bo_del_from_lru(bo); |
688 | list_del_init(&bo->ddestroy); | |
689 | ++put_count; | |
690 | ||
691 | spin_unlock(&glob->lru_lock); | |
692 | ttm_bo_cleanup_memtype_use(bo); | |
693 | ||
d6ea8886 | 694 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
695 | |
696 | return 0; | |
ba4e7d97 TH |
697 | } |
698 | ||
699 | /** | |
700 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
701 | * encountered buffers. | |
702 | */ | |
703 | ||
704 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
705 | { | |
a987fcaa | 706 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
707 | struct ttm_buffer_object *entry = NULL; |
708 | int ret = 0; | |
ba4e7d97 | 709 | |
a987fcaa | 710 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
711 | if (list_empty(&bdev->ddestroy)) |
712 | goto out_unlock; | |
713 | ||
714 | entry = list_first_entry(&bdev->ddestroy, | |
715 | struct ttm_buffer_object, ddestroy); | |
716 | kref_get(&entry->list_kref); | |
717 | ||
718 | for (;;) { | |
719 | struct ttm_buffer_object *nentry = NULL; | |
720 | ||
721 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
722 | nentry = list_first_entry(&entry->ddestroy, | |
723 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
724 | kref_get(&nentry->list_kref); |
725 | } | |
ba4e7d97 | 726 | |
63d0a419 ML |
727 | ret = ttm_bo_reserve_nolru(entry, false, true, false, 0); |
728 | if (remove_all && ret) { | |
729 | spin_unlock(&glob->lru_lock); | |
730 | ret = ttm_bo_reserve_nolru(entry, false, false, | |
731 | false, 0); | |
732 | spin_lock(&glob->lru_lock); | |
733 | } | |
734 | ||
85b144f8 ML |
735 | if (!ret) |
736 | ret = ttm_bo_cleanup_refs_and_unlock(entry, false, | |
737 | !remove_all); | |
738 | else | |
739 | spin_unlock(&glob->lru_lock); | |
740 | ||
ba4e7d97 | 741 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
742 | entry = nentry; |
743 | ||
744 | if (ret || !entry) | |
745 | goto out; | |
ba4e7d97 | 746 | |
a987fcaa | 747 | spin_lock(&glob->lru_lock); |
1a961ce0 | 748 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
749 | break; |
750 | } | |
ba4e7d97 | 751 | |
1a961ce0 LB |
752 | out_unlock: |
753 | spin_unlock(&glob->lru_lock); | |
754 | out: | |
755 | if (entry) | |
756 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
757 | return ret; |
758 | } | |
759 | ||
760 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
761 | { | |
762 | struct ttm_bo_device *bdev = | |
763 | container_of(work, struct ttm_bo_device, wq.work); | |
764 | ||
765 | if (ttm_bo_delayed_delete(bdev, false)) { | |
766 | schedule_delayed_work(&bdev->wq, | |
767 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
768 | } | |
769 | } | |
770 | ||
771 | static void ttm_bo_release(struct kref *kref) | |
772 | { | |
773 | struct ttm_buffer_object *bo = | |
774 | container_of(kref, struct ttm_buffer_object, kref); | |
775 | struct ttm_bo_device *bdev = bo->bdev; | |
eba67093 | 776 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
ba4e7d97 | 777 | |
82fe50bc | 778 | write_lock(&bdev->vm_lock); |
ba4e7d97 TH |
779 | if (likely(bo->vm_node != NULL)) { |
780 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
781 | drm_mm_put_block(bo->vm_node); | |
782 | bo->vm_node = NULL; | |
783 | } | |
784 | write_unlock(&bdev->vm_lock); | |
eba67093 TH |
785 | ttm_mem_io_lock(man, false); |
786 | ttm_mem_io_free_vm(bo); | |
787 | ttm_mem_io_unlock(man); | |
e1efc9b6 | 788 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 | 789 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
790 | } |
791 | ||
792 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
793 | { | |
794 | struct ttm_buffer_object *bo = *p_bo; | |
ba4e7d97 TH |
795 | |
796 | *p_bo = NULL; | |
ba4e7d97 | 797 | kref_put(&bo->kref, ttm_bo_release); |
ba4e7d97 TH |
798 | } |
799 | EXPORT_SYMBOL(ttm_bo_unref); | |
800 | ||
7c5ee536 MG |
801 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
802 | { | |
803 | return cancel_delayed_work_sync(&bdev->wq); | |
804 | } | |
805 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
806 | ||
807 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
808 | { | |
809 | if (resched) | |
810 | schedule_delayed_work(&bdev->wq, | |
811 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
812 | } | |
813 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
814 | ||
ca262a99 | 815 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
97a875cb | 816 | bool no_wait_gpu) |
ba4e7d97 | 817 | { |
ba4e7d97 TH |
818 | struct ttm_bo_device *bdev = bo->bdev; |
819 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
820 | struct ttm_placement placement; |
821 | int ret = 0; | |
ba4e7d97 | 822 | |
702adba2 | 823 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 824 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 825 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 826 | |
78ecf091 | 827 | if (unlikely(ret != 0)) { |
98ffc415 | 828 | if (ret != -ERESTARTSYS) { |
25d0479a | 829 | pr_err("Failed to expire sync object before buffer eviction\n"); |
78ecf091 | 830 | } |
ba4e7d97 TH |
831 | goto out; |
832 | } | |
833 | ||
a9dbfff1 | 834 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ba4e7d97 TH |
835 | |
836 | evict_mem = bo->mem; | |
837 | evict_mem.mm_node = NULL; | |
eba67093 TH |
838 | evict_mem.bus.io_reserved_vm = false; |
839 | evict_mem.bus.io_reserved_count = 0; | |
ba4e7d97 | 840 | |
7cb7d1d7 JG |
841 | placement.fpfn = 0; |
842 | placement.lpfn = 0; | |
843 | placement.num_placement = 0; | |
844 | placement.num_busy_placement = 0; | |
ca262a99 JG |
845 | bdev->driver->evict_flags(bo, &placement); |
846 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
97a875cb | 847 | no_wait_gpu); |
ba4e7d97 | 848 | if (ret) { |
fb53f862 | 849 | if (ret != -ERESTARTSYS) { |
25d0479a JP |
850 | pr_err("Failed to find memory space for buffer 0x%p eviction\n", |
851 | bo); | |
fb53f862 JG |
852 | ttm_bo_mem_space_debug(bo, &placement); |
853 | } | |
ba4e7d97 TH |
854 | goto out; |
855 | } | |
856 | ||
857 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
97a875cb | 858 | no_wait_gpu); |
ba4e7d97 | 859 | if (ret) { |
98ffc415 | 860 | if (ret != -ERESTARTSYS) |
25d0479a | 861 | pr_err("Buffer eviction failed\n"); |
42311ff9 | 862 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
863 | goto out; |
864 | } | |
ca262a99 JG |
865 | bo->evicted = true; |
866 | out: | |
867 | return ret; | |
868 | } | |
869 | ||
870 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
871 | uint32_t mem_type, | |
97a875cb | 872 | bool interruptible, |
9d87fa21 | 873 | bool no_wait_gpu) |
ca262a99 JG |
874 | { |
875 | struct ttm_bo_global *glob = bdev->glob; | |
876 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
877 | struct ttm_buffer_object *bo; | |
e7ab2019 | 878 | int ret = -EBUSY, put_count; |
ba4e7d97 | 879 | |
a987fcaa | 880 | spin_lock(&glob->lru_lock); |
e7ab2019 | 881 | list_for_each_entry(bo, &man->lru, lru) { |
63d0a419 | 882 | ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
e7ab2019 ML |
883 | if (!ret) |
884 | break; | |
885 | } | |
886 | ||
887 | if (ret) { | |
9c51ba1d | 888 | spin_unlock(&glob->lru_lock); |
e7ab2019 | 889 | return ret; |
9c51ba1d TH |
890 | } |
891 | ||
ca262a99 | 892 | kref_get(&bo->list_kref); |
9c51ba1d | 893 | |
e1efc9b6 | 894 | if (!list_empty(&bo->ddestroy)) { |
e7ab2019 ML |
895 | ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible, |
896 | no_wait_gpu); | |
e1efc9b6 | 897 | kref_put(&bo->list_kref, ttm_bo_release_list); |
b8e902f2 | 898 | return ret; |
e1efc9b6 TH |
899 | } |
900 | ||
9c51ba1d | 901 | put_count = ttm_bo_del_from_lru(bo); |
a987fcaa | 902 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
903 | |
904 | BUG_ON(ret != 0); | |
905 | ||
d6ea8886 | 906 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 907 | |
97a875cb | 908 | ret = ttm_bo_evict(bo, interruptible, no_wait_gpu); |
ca262a99 | 909 | ttm_bo_unreserve(bo); |
9c51ba1d | 910 | |
ca262a99 | 911 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
912 | return ret; |
913 | } | |
914 | ||
42311ff9 BS |
915 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
916 | { | |
d961db75 | 917 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 918 | |
d961db75 BS |
919 | if (mem->mm_node) |
920 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
921 | } |
922 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
923 | ||
ba4e7d97 TH |
924 | /** |
925 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
926 | * space, or we've evicted everything and there isn't enough space. | |
927 | */ | |
ca262a99 JG |
928 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
929 | uint32_t mem_type, | |
930 | struct ttm_placement *placement, | |
931 | struct ttm_mem_reg *mem, | |
9d87fa21 | 932 | bool interruptible, |
9d87fa21 | 933 | bool no_wait_gpu) |
ba4e7d97 | 934 | { |
ca262a99 | 935 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 936 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
937 | int ret; |
938 | ||
ba4e7d97 | 939 | do { |
d961db75 | 940 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
941 | if (unlikely(ret != 0)) |
942 | return ret; | |
d961db75 | 943 | if (mem->mm_node) |
ba4e7d97 | 944 | break; |
97a875cb ML |
945 | ret = ttm_mem_evict_first(bdev, mem_type, |
946 | interruptible, no_wait_gpu); | |
ba4e7d97 TH |
947 | if (unlikely(ret != 0)) |
948 | return ret; | |
ba4e7d97 | 949 | } while (1); |
d961db75 | 950 | if (mem->mm_node == NULL) |
ba4e7d97 | 951 | return -ENOMEM; |
ba4e7d97 TH |
952 | mem->mem_type = mem_type; |
953 | return 0; | |
954 | } | |
955 | ||
ae3e8122 TH |
956 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
957 | uint32_t cur_placement, | |
958 | uint32_t proposed_placement) | |
959 | { | |
960 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
961 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
962 | ||
963 | /** | |
964 | * Keep current caching if possible. | |
965 | */ | |
966 | ||
967 | if ((cur_placement & caching) != 0) | |
968 | result |= (cur_placement & caching); | |
969 | else if ((man->default_caching & caching) != 0) | |
970 | result |= man->default_caching; | |
971 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
972 | result |= TTM_PL_FLAG_CACHED; | |
973 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
974 | result |= TTM_PL_FLAG_WC; | |
975 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
976 | result |= TTM_PL_FLAG_UNCACHED; | |
977 | ||
978 | return result; | |
979 | } | |
980 | ||
ba4e7d97 | 981 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
ba4e7d97 | 982 | uint32_t mem_type, |
ae3e8122 TH |
983 | uint32_t proposed_placement, |
984 | uint32_t *masked_placement) | |
ba4e7d97 TH |
985 | { |
986 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
987 | ||
ae3e8122 | 988 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
989 | return false; |
990 | ||
ae3e8122 | 991 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 992 | return false; |
ba4e7d97 | 993 | |
ae3e8122 TH |
994 | cur_flags |= (proposed_placement & man->available_caching); |
995 | ||
996 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
997 | return true; |
998 | } | |
999 | ||
1000 | /** | |
1001 | * Creates space for memory region @mem according to its type. | |
1002 | * | |
1003 | * This function first searches for free space in compatible memory types in | |
1004 | * the priority order defined by the driver. If free space isn't found, then | |
1005 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
1006 | * space. | |
1007 | */ | |
1008 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
1009 | struct ttm_placement *placement, |
1010 | struct ttm_mem_reg *mem, | |
97a875cb | 1011 | bool interruptible, |
9d87fa21 | 1012 | bool no_wait_gpu) |
ba4e7d97 TH |
1013 | { |
1014 | struct ttm_bo_device *bdev = bo->bdev; | |
1015 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
1016 | uint32_t mem_type = TTM_PL_SYSTEM; |
1017 | uint32_t cur_flags = 0; | |
1018 | bool type_found = false; | |
1019 | bool type_ok = false; | |
98ffc415 | 1020 | bool has_erestartsys = false; |
ca262a99 | 1021 | int i, ret; |
ba4e7d97 TH |
1022 | |
1023 | mem->mm_node = NULL; | |
b6637526 | 1024 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
1025 | ret = ttm_mem_type_from_flags(placement->placement[i], |
1026 | &mem_type); | |
1027 | if (ret) | |
1028 | return ret; | |
ba4e7d97 TH |
1029 | man = &bdev->man[mem_type]; |
1030 | ||
1031 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
1032 | mem_type, |
1033 | placement->placement[i], | |
1034 | &cur_flags); | |
ba4e7d97 TH |
1035 | |
1036 | if (!type_ok) | |
1037 | continue; | |
1038 | ||
ae3e8122 TH |
1039 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1040 | cur_flags); | |
ca262a99 JG |
1041 | /* |
1042 | * Use the access and other non-mapping-related flag bits from | |
1043 | * the memory placement flags to the current flags | |
1044 | */ | |
1045 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
1046 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 1047 | |
ba4e7d97 TH |
1048 | if (mem_type == TTM_PL_SYSTEM) |
1049 | break; | |
1050 | ||
1051 | if (man->has_type && man->use_type) { | |
1052 | type_found = true; | |
d961db75 | 1053 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
1054 | if (unlikely(ret)) |
1055 | return ret; | |
ba4e7d97 | 1056 | } |
d961db75 | 1057 | if (mem->mm_node) |
ba4e7d97 TH |
1058 | break; |
1059 | } | |
1060 | ||
d961db75 | 1061 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
1062 | mem->mem_type = mem_type; |
1063 | mem->placement = cur_flags; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | if (!type_found) | |
1068 | return -EINVAL; | |
1069 | ||
b6637526 DA |
1070 | for (i = 0; i < placement->num_busy_placement; ++i) { |
1071 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
1072 | &mem_type); |
1073 | if (ret) | |
1074 | return ret; | |
ba4e7d97 | 1075 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1076 | if (!man->has_type) |
1077 | continue; | |
ba4e7d97 | 1078 | if (!ttm_bo_mt_compatible(man, |
ca262a99 | 1079 | mem_type, |
b6637526 | 1080 | placement->busy_placement[i], |
ca262a99 | 1081 | &cur_flags)) |
ba4e7d97 TH |
1082 | continue; |
1083 | ||
ae3e8122 TH |
1084 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1085 | cur_flags); | |
ca262a99 JG |
1086 | /* |
1087 | * Use the access and other non-mapping-related flag bits from | |
1088 | * the memory placement flags to the current flags | |
1089 | */ | |
b6637526 | 1090 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 1091 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1092 | |
0eaddb28 TH |
1093 | |
1094 | if (mem_type == TTM_PL_SYSTEM) { | |
1095 | mem->mem_type = mem_type; | |
1096 | mem->placement = cur_flags; | |
1097 | mem->mm_node = NULL; | |
1098 | return 0; | |
1099 | } | |
1100 | ||
ca262a99 | 1101 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
97a875cb | 1102 | interruptible, no_wait_gpu); |
ba4e7d97 TH |
1103 | if (ret == 0 && mem->mm_node) { |
1104 | mem->placement = cur_flags; | |
1105 | return 0; | |
1106 | } | |
98ffc415 TH |
1107 | if (ret == -ERESTARTSYS) |
1108 | has_erestartsys = true; | |
ba4e7d97 | 1109 | } |
98ffc415 | 1110 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1111 | return ret; |
1112 | } | |
1113 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1114 | ||
ba4e7d97 | 1115 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, |
ca262a99 | 1116 | struct ttm_placement *placement, |
97a875cb | 1117 | bool interruptible, |
9d87fa21 | 1118 | bool no_wait_gpu) |
ba4e7d97 | 1119 | { |
ba4e7d97 TH |
1120 | int ret = 0; |
1121 | struct ttm_mem_reg mem; | |
702adba2 | 1122 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 1123 | |
a9dbfff1 | 1124 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ba4e7d97 TH |
1125 | |
1126 | /* | |
1127 | * FIXME: It's possible to pipeline buffer moves. | |
1128 | * Have the driver move function wait for idle when necessary, | |
1129 | * instead of doing it here. | |
1130 | */ | |
702adba2 | 1131 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1132 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 1133 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1134 | if (ret) |
1135 | return ret; | |
ba4e7d97 TH |
1136 | mem.num_pages = bo->num_pages; |
1137 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1138 | mem.page_alignment = bo->mem.page_alignment; | |
eba67093 TH |
1139 | mem.bus.io_reserved_vm = false; |
1140 | mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1141 | /* |
1142 | * Determine where to move the buffer. | |
1143 | */ | |
97a875cb ML |
1144 | ret = ttm_bo_mem_space(bo, placement, &mem, |
1145 | interruptible, no_wait_gpu); | |
ba4e7d97 TH |
1146 | if (ret) |
1147 | goto out_unlock; | |
97a875cb ML |
1148 | ret = ttm_bo_handle_move_mem(bo, &mem, false, |
1149 | interruptible, no_wait_gpu); | |
ba4e7d97 | 1150 | out_unlock: |
d961db75 BS |
1151 | if (ret && mem.mm_node) |
1152 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1153 | return ret; |
1154 | } | |
1155 | ||
ca262a99 | 1156 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1157 | struct ttm_mem_reg *mem) |
1158 | { | |
ca262a99 | 1159 | int i; |
e22238ea | 1160 | |
d961db75 BS |
1161 | if (mem->mm_node && placement->lpfn != 0 && |
1162 | (mem->start < placement->fpfn || | |
1163 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1164 | return -1; |
ca262a99 JG |
1165 | |
1166 | for (i = 0; i < placement->num_placement; i++) { | |
1167 | if ((placement->placement[i] & mem->placement & | |
1168 | TTM_PL_MASK_CACHING) && | |
1169 | (placement->placement[i] & mem->placement & | |
1170 | TTM_PL_MASK_MEM)) | |
1171 | return i; | |
1172 | } | |
1173 | return -1; | |
ba4e7d97 TH |
1174 | } |
1175 | ||
09855acb JG |
1176 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1177 | struct ttm_placement *placement, | |
97a875cb | 1178 | bool interruptible, |
9d87fa21 | 1179 | bool no_wait_gpu) |
ba4e7d97 TH |
1180 | { |
1181 | int ret; | |
1182 | ||
a9dbfff1 | 1183 | BUG_ON(!ttm_bo_is_reserved(bo)); |
ca262a99 JG |
1184 | /* Check that range is valid */ |
1185 | if (placement->lpfn || placement->fpfn) | |
1186 | if (placement->fpfn > placement->lpfn || | |
1187 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1188 | return -EINVAL; | |
ba4e7d97 TH |
1189 | /* |
1190 | * Check whether we need to move buffer. | |
1191 | */ | |
ca262a99 JG |
1192 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1193 | if (ret < 0) { | |
97a875cb ML |
1194 | ret = ttm_bo_move_buffer(bo, placement, interruptible, |
1195 | no_wait_gpu); | |
ca262a99 | 1196 | if (ret) |
ba4e7d97 | 1197 | return ret; |
ca262a99 JG |
1198 | } else { |
1199 | /* | |
1200 | * Use the access and other non-mapping-related flag bits from | |
1201 | * the compatible memory placement flags to the active flags | |
1202 | */ | |
1203 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1204 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1205 | } |
ba4e7d97 TH |
1206 | /* |
1207 | * We might need to add a TTM. | |
1208 | */ | |
ba4e7d97 TH |
1209 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1210 | ret = ttm_bo_add_ttm(bo, true); | |
1211 | if (ret) | |
1212 | return ret; | |
1213 | } | |
ba4e7d97 TH |
1214 | return 0; |
1215 | } | |
09855acb | 1216 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1217 | |
09855acb JG |
1218 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1219 | struct ttm_placement *placement) | |
ba4e7d97 | 1220 | { |
29e190e0 TH |
1221 | BUG_ON((placement->fpfn || placement->lpfn) && |
1222 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1223 | |
ba4e7d97 TH |
1224 | return 0; |
1225 | } | |
1226 | ||
09855acb JG |
1227 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1228 | struct ttm_buffer_object *bo, | |
1229 | unsigned long size, | |
1230 | enum ttm_bo_type type, | |
1231 | struct ttm_placement *placement, | |
1232 | uint32_t page_alignment, | |
09855acb | 1233 | bool interruptible, |
5df23979 | 1234 | struct file *persistent_swap_storage, |
09855acb | 1235 | size_t acc_size, |
129b78bf | 1236 | struct sg_table *sg, |
09855acb | 1237 | void (*destroy) (struct ttm_buffer_object *)) |
ba4e7d97 | 1238 | { |
09855acb | 1239 | int ret = 0; |
ba4e7d97 | 1240 | unsigned long num_pages; |
57de4ba9 JG |
1241 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
1242 | ||
1243 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); | |
1244 | if (ret) { | |
25d0479a | 1245 | pr_err("Out of kernel memory\n"); |
57de4ba9 JG |
1246 | if (destroy) |
1247 | (*destroy)(bo); | |
1248 | else | |
1249 | kfree(bo); | |
1250 | return -ENOMEM; | |
1251 | } | |
ba4e7d97 | 1252 | |
ba4e7d97 TH |
1253 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; |
1254 | if (num_pages == 0) { | |
25d0479a | 1255 | pr_err("Illegal buffer object size\n"); |
7dfbbdcf TH |
1256 | if (destroy) |
1257 | (*destroy)(bo); | |
1258 | else | |
1259 | kfree(bo); | |
a393c730 | 1260 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1261 | return -EINVAL; |
1262 | } | |
1263 | bo->destroy = destroy; | |
1264 | ||
ba4e7d97 TH |
1265 | kref_init(&bo->kref); |
1266 | kref_init(&bo->list_kref); | |
1267 | atomic_set(&bo->cpu_writers, 0); | |
1268 | atomic_set(&bo->reserved, 1); | |
1269 | init_waitqueue_head(&bo->event_queue); | |
1270 | INIT_LIST_HEAD(&bo->lru); | |
1271 | INIT_LIST_HEAD(&bo->ddestroy); | |
1272 | INIT_LIST_HEAD(&bo->swap); | |
eba67093 | 1273 | INIT_LIST_HEAD(&bo->io_reserve_lru); |
ba4e7d97 | 1274 | bo->bdev = bdev; |
a987fcaa | 1275 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1276 | bo->type = type; |
1277 | bo->num_pages = num_pages; | |
eb6d2c39 | 1278 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1279 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1280 | bo->mem.num_pages = bo->num_pages; | |
1281 | bo->mem.mm_node = NULL; | |
1282 | bo->mem.page_alignment = page_alignment; | |
eba67093 TH |
1283 | bo->mem.bus.io_reserved_vm = false; |
1284 | bo->mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1285 | bo->priv_flags = 0; |
1286 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1287 | bo->seq_valid = false; | |
5df23979 | 1288 | bo->persistent_swap_storage = persistent_swap_storage; |
ba4e7d97 | 1289 | bo->acc_size = acc_size; |
129b78bf | 1290 | bo->sg = sg; |
a987fcaa | 1291 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1292 | |
09855acb | 1293 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1294 | if (unlikely(ret != 0)) |
1295 | goto out_err; | |
1296 | ||
ba4e7d97 TH |
1297 | /* |
1298 | * For ttm_bo_type_device buffers, allocate | |
1299 | * address space from the device. | |
1300 | */ | |
129b78bf DA |
1301 | if (bo->type == ttm_bo_type_device || |
1302 | bo->type == ttm_bo_type_sg) { | |
ba4e7d97 TH |
1303 | ret = ttm_bo_setup_vm(bo); |
1304 | if (ret) | |
1305 | goto out_err; | |
1306 | } | |
1307 | ||
97a875cb | 1308 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
ba4e7d97 TH |
1309 | if (ret) |
1310 | goto out_err; | |
1311 | ||
1312 | ttm_bo_unreserve(bo); | |
1313 | return 0; | |
1314 | ||
1315 | out_err: | |
1316 | ttm_bo_unreserve(bo); | |
1317 | ttm_bo_unref(&bo); | |
1318 | ||
1319 | return ret; | |
1320 | } | |
09855acb | 1321 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1322 | |
57de4ba9 JG |
1323 | size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, |
1324 | unsigned long bo_size, | |
1325 | unsigned struct_size) | |
ba4e7d97 | 1326 | { |
57de4ba9 JG |
1327 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
1328 | size_t size = 0; | |
ba4e7d97 | 1329 | |
57de4ba9 JG |
1330 | size += ttm_round_pot(struct_size); |
1331 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1332 | size += ttm_round_pot(sizeof(struct ttm_tt)); | |
1333 | return size; | |
ba4e7d97 | 1334 | } |
57de4ba9 JG |
1335 | EXPORT_SYMBOL(ttm_bo_acc_size); |
1336 | ||
1337 | size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, | |
1338 | unsigned long bo_size, | |
1339 | unsigned struct_size) | |
1340 | { | |
1341 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; | |
1342 | size_t size = 0; | |
1343 | ||
1344 | size += ttm_round_pot(struct_size); | |
1345 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1346 | size += PAGE_ALIGN(npages * sizeof(dma_addr_t)); | |
1347 | size += ttm_round_pot(sizeof(struct ttm_dma_tt)); | |
1348 | return size; | |
1349 | } | |
1350 | EXPORT_SYMBOL(ttm_bo_dma_acc_size); | |
ba4e7d97 | 1351 | |
09855acb JG |
1352 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1353 | unsigned long size, | |
1354 | enum ttm_bo_type type, | |
1355 | struct ttm_placement *placement, | |
1356 | uint32_t page_alignment, | |
09855acb | 1357 | bool interruptible, |
5df23979 | 1358 | struct file *persistent_swap_storage, |
09855acb | 1359 | struct ttm_buffer_object **p_bo) |
ba4e7d97 TH |
1360 | { |
1361 | struct ttm_buffer_object *bo; | |
57de4ba9 | 1362 | size_t acc_size; |
ca262a99 | 1363 | int ret; |
ba4e7d97 | 1364 | |
ba4e7d97 | 1365 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
a393c730 | 1366 | if (unlikely(bo == NULL)) |
ba4e7d97 | 1367 | return -ENOMEM; |
ba4e7d97 | 1368 | |
a393c730 | 1369 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); |
09855acb | 1370 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
0b91c4a1 MS |
1371 | interruptible, persistent_swap_storage, acc_size, |
1372 | NULL, NULL); | |
ba4e7d97 TH |
1373 | if (likely(ret == 0)) |
1374 | *p_bo = bo; | |
1375 | ||
1376 | return ret; | |
1377 | } | |
4d798937 | 1378 | EXPORT_SYMBOL(ttm_bo_create); |
ba4e7d97 | 1379 | |
ba4e7d97 | 1380 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1381 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1382 | { |
ca262a99 | 1383 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1384 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1385 | int ret; |
ba4e7d97 TH |
1386 | |
1387 | /* | |
1388 | * Can't use standard list traversal since we're unlocking. | |
1389 | */ | |
1390 | ||
a987fcaa | 1391 | spin_lock(&glob->lru_lock); |
ca262a99 | 1392 | while (!list_empty(&man->lru)) { |
a987fcaa | 1393 | spin_unlock(&glob->lru_lock); |
97a875cb | 1394 | ret = ttm_mem_evict_first(bdev, mem_type, false, false); |
ca262a99 JG |
1395 | if (ret) { |
1396 | if (allow_errors) { | |
1397 | return ret; | |
1398 | } else { | |
25d0479a | 1399 | pr_err("Cleanup eviction failed\n"); |
ca262a99 JG |
1400 | } |
1401 | } | |
a987fcaa | 1402 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1403 | } |
a987fcaa | 1404 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1405 | return 0; |
1406 | } | |
1407 | ||
1408 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1409 | { | |
c96e7c7a | 1410 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1411 | int ret = -EINVAL; |
1412 | ||
1413 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
25d0479a | 1414 | pr_err("Illegal memory type %d\n", mem_type); |
ba4e7d97 TH |
1415 | return ret; |
1416 | } | |
c96e7c7a | 1417 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1418 | |
1419 | if (!man->has_type) { | |
25d0479a JP |
1420 | pr_err("Trying to take down uninitialized memory manager type %u\n", |
1421 | mem_type); | |
ba4e7d97 TH |
1422 | return ret; |
1423 | } | |
1424 | ||
1425 | man->use_type = false; | |
1426 | man->has_type = false; | |
1427 | ||
1428 | ret = 0; | |
1429 | if (mem_type > 0) { | |
ca262a99 | 1430 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1431 | |
d961db75 | 1432 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1433 | } |
1434 | ||
1435 | return ret; | |
1436 | } | |
1437 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1438 | ||
1439 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1440 | { | |
1441 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1442 | ||
1443 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
25d0479a | 1444 | pr_err("Illegal memory manager memory type %u\n", mem_type); |
ba4e7d97 TH |
1445 | return -EINVAL; |
1446 | } | |
1447 | ||
1448 | if (!man->has_type) { | |
25d0479a | 1449 | pr_err("Memory type %u has not been initialized\n", mem_type); |
ba4e7d97 TH |
1450 | return 0; |
1451 | } | |
1452 | ||
ca262a99 | 1453 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1454 | } |
1455 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1456 | ||
1457 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1458 | unsigned long p_size) |
ba4e7d97 TH |
1459 | { |
1460 | int ret = -EINVAL; | |
1461 | struct ttm_mem_type_manager *man; | |
1462 | ||
dbc4a5b8 | 1463 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1464 | man = &bdev->man[type]; |
dbc4a5b8 | 1465 | BUG_ON(man->has_type); |
eba67093 TH |
1466 | man->io_reserve_fastpath = true; |
1467 | man->use_io_reserve_lru = false; | |
1468 | mutex_init(&man->io_reserve_mutex); | |
1469 | INIT_LIST_HEAD(&man->io_reserve_lru); | |
ba4e7d97 TH |
1470 | |
1471 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1472 | if (ret) | |
1473 | return ret; | |
d961db75 | 1474 | man->bdev = bdev; |
ba4e7d97 TH |
1475 | |
1476 | ret = 0; | |
1477 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1478 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1479 | if (ret) |
1480 | return ret; | |
1481 | } | |
1482 | man->has_type = true; | |
1483 | man->use_type = true; | |
1484 | man->size = p_size; | |
1485 | ||
1486 | INIT_LIST_HEAD(&man->lru); | |
1487 | ||
1488 | return 0; | |
1489 | } | |
1490 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1491 | ||
a987fcaa TH |
1492 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1493 | { | |
1494 | struct ttm_bo_global *glob = | |
1495 | container_of(kobj, struct ttm_bo_global, kobj); | |
1496 | ||
a987fcaa TH |
1497 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1498 | __free_page(glob->dummy_read_page); | |
1499 | kfree(glob); | |
1500 | } | |
1501 | ||
ba4420c2 | 1502 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1503 | { |
1504 | struct ttm_bo_global *glob = ref->object; | |
1505 | ||
1506 | kobject_del(&glob->kobj); | |
1507 | kobject_put(&glob->kobj); | |
1508 | } | |
1509 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1510 | ||
ba4420c2 | 1511 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1512 | { |
1513 | struct ttm_bo_global_ref *bo_ref = | |
1514 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1515 | struct ttm_bo_global *glob = ref->object; | |
1516 | int ret; | |
1517 | ||
1518 | mutex_init(&glob->device_list_mutex); | |
1519 | spin_lock_init(&glob->lru_lock); | |
1520 | glob->mem_glob = bo_ref->mem_glob; | |
1521 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1522 | ||
1523 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1524 | ret = -ENOMEM; | |
1525 | goto out_no_drp; | |
1526 | } | |
1527 | ||
1528 | INIT_LIST_HEAD(&glob->swap_lru); | |
1529 | INIT_LIST_HEAD(&glob->device_list); | |
1530 | ||
1531 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1532 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1533 | if (unlikely(ret != 0)) { | |
25d0479a | 1534 | pr_err("Could not register buffer object swapout\n"); |
a987fcaa TH |
1535 | goto out_no_shrink; |
1536 | } | |
1537 | ||
a987fcaa TH |
1538 | atomic_set(&glob->bo_count, 0); |
1539 | ||
b642ed06 RD |
1540 | ret = kobject_init_and_add( |
1541 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1542 | if (unlikely(ret != 0)) |
1543 | kobject_put(&glob->kobj); | |
1544 | return ret; | |
1545 | out_no_shrink: | |
1546 | __free_page(glob->dummy_read_page); | |
1547 | out_no_drp: | |
1548 | kfree(glob); | |
1549 | return ret; | |
1550 | } | |
1551 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1552 | ||
1553 | ||
ba4e7d97 TH |
1554 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1555 | { | |
1556 | int ret = 0; | |
1557 | unsigned i = TTM_NUM_MEM_TYPES; | |
1558 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1559 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1560 | |
1561 | while (i--) { | |
1562 | man = &bdev->man[i]; | |
1563 | if (man->has_type) { | |
1564 | man->use_type = false; | |
1565 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1566 | ret = -EBUSY; | |
25d0479a JP |
1567 | pr_err("DRM memory manager type %d is not clean\n", |
1568 | i); | |
ba4e7d97 TH |
1569 | } |
1570 | man->has_type = false; | |
1571 | } | |
1572 | } | |
1573 | ||
a987fcaa TH |
1574 | mutex_lock(&glob->device_list_mutex); |
1575 | list_del(&bdev->device_list); | |
1576 | mutex_unlock(&glob->device_list_mutex); | |
1577 | ||
f094cfc6 | 1578 | cancel_delayed_work_sync(&bdev->wq); |
ba4e7d97 TH |
1579 | |
1580 | while (ttm_bo_delayed_delete(bdev, true)) | |
1581 | ; | |
1582 | ||
a987fcaa | 1583 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1584 | if (list_empty(&bdev->ddestroy)) |
1585 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1586 | ||
1587 | if (list_empty(&bdev->man[0].lru)) | |
1588 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1589 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1590 | |
ba4e7d97 TH |
1591 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1592 | write_lock(&bdev->vm_lock); | |
1593 | drm_mm_takedown(&bdev->addr_space_mm); | |
1594 | write_unlock(&bdev->vm_lock); | |
1595 | ||
ba4e7d97 TH |
1596 | return ret; |
1597 | } | |
1598 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1599 | ||
ba4e7d97 | 1600 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1601 | struct ttm_bo_global *glob, |
1602 | struct ttm_bo_driver *driver, | |
51c8b407 | 1603 | uint64_t file_page_offset, |
ad49f501 | 1604 | bool need_dma32) |
ba4e7d97 TH |
1605 | { |
1606 | int ret = -EINVAL; | |
1607 | ||
ba4e7d97 | 1608 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1609 | bdev->driver = driver; |
ba4e7d97 TH |
1610 | |
1611 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1612 | ||
ba4e7d97 TH |
1613 | /* |
1614 | * Initialize the system memory buffer type. | |
1615 | * Other types need to be driver / IOCTL initialized. | |
1616 | */ | |
ca262a99 | 1617 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1618 | if (unlikely(ret != 0)) |
a987fcaa | 1619 | goto out_no_sys; |
ba4e7d97 TH |
1620 | |
1621 | bdev->addr_space_rb = RB_ROOT; | |
1622 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1623 | if (unlikely(ret != 0)) | |
a987fcaa | 1624 | goto out_no_addr_mm; |
ba4e7d97 TH |
1625 | |
1626 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
ba4e7d97 | 1627 | INIT_LIST_HEAD(&bdev->ddestroy); |
ba4e7d97 | 1628 | bdev->dev_mapping = NULL; |
a987fcaa | 1629 | bdev->glob = glob; |
ad49f501 | 1630 | bdev->need_dma32 = need_dma32; |
65705962 | 1631 | bdev->val_seq = 0; |
702adba2 | 1632 | spin_lock_init(&bdev->fence_lock); |
a987fcaa TH |
1633 | mutex_lock(&glob->device_list_mutex); |
1634 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1635 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1636 | |
1637 | return 0; | |
a987fcaa | 1638 | out_no_addr_mm: |
ba4e7d97 | 1639 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1640 | out_no_sys: |
ba4e7d97 TH |
1641 | return ret; |
1642 | } | |
1643 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1644 | ||
1645 | /* | |
1646 | * buffer object vm functions. | |
1647 | */ | |
1648 | ||
1649 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1650 | { | |
1651 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1652 | ||
1653 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1654 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1655 | return false; | |
1656 | ||
1657 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1658 | return false; | |
1659 | ||
1660 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1661 | return false; | |
1662 | } | |
1663 | return true; | |
1664 | } | |
1665 | ||
eba67093 | 1666 | void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
1667 | { |
1668 | struct ttm_bo_device *bdev = bo->bdev; | |
1669 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1670 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1671 | ||
1672 | if (!bdev->dev_mapping) | |
1673 | return; | |
ba4e7d97 | 1674 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
eba67093 | 1675 | ttm_mem_io_free_vm(bo); |
ba4e7d97 | 1676 | } |
eba67093 TH |
1677 | |
1678 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1679 | { | |
1680 | struct ttm_bo_device *bdev = bo->bdev; | |
1681 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; | |
1682 | ||
1683 | ttm_mem_io_lock(man, false); | |
1684 | ttm_bo_unmap_virtual_locked(bo); | |
1685 | ttm_mem_io_unlock(man); | |
ba4e7d97 | 1686 | } |
eba67093 TH |
1687 | |
1688 | ||
e024e110 | 1689 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1690 | |
1691 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1692 | { | |
1693 | struct ttm_bo_device *bdev = bo->bdev; | |
1694 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1695 | struct rb_node *parent = NULL; | |
1696 | struct ttm_buffer_object *cur_bo; | |
1697 | unsigned long offset = bo->vm_node->start; | |
1698 | unsigned long cur_offset; | |
1699 | ||
1700 | while (*cur) { | |
1701 | parent = *cur; | |
1702 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1703 | cur_offset = cur_bo->vm_node->start; | |
1704 | if (offset < cur_offset) | |
1705 | cur = &parent->rb_left; | |
1706 | else if (offset > cur_offset) | |
1707 | cur = &parent->rb_right; | |
1708 | else | |
1709 | BUG(); | |
1710 | } | |
1711 | ||
1712 | rb_link_node(&bo->vm_rb, parent, cur); | |
1713 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1714 | } | |
1715 | ||
1716 | /** | |
1717 | * ttm_bo_setup_vm: | |
1718 | * | |
1719 | * @bo: the buffer to allocate address space for | |
1720 | * | |
1721 | * Allocate address space in the drm device so that applications | |
1722 | * can mmap the buffer and access the contents. This only | |
1723 | * applies to ttm_bo_type_device objects as others are not | |
1724 | * placed in the drm device address space. | |
1725 | */ | |
1726 | ||
1727 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1728 | { | |
1729 | struct ttm_bo_device *bdev = bo->bdev; | |
1730 | int ret; | |
1731 | ||
1732 | retry_pre_get: | |
1733 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1734 | if (unlikely(ret != 0)) | |
1735 | return ret; | |
1736 | ||
1737 | write_lock(&bdev->vm_lock); | |
1738 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1739 | bo->mem.num_pages, 0, 0); | |
1740 | ||
1741 | if (unlikely(bo->vm_node == NULL)) { | |
1742 | ret = -ENOMEM; | |
1743 | goto out_unlock; | |
1744 | } | |
1745 | ||
1746 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1747 | bo->mem.num_pages, 0); | |
1748 | ||
1749 | if (unlikely(bo->vm_node == NULL)) { | |
1750 | write_unlock(&bdev->vm_lock); | |
1751 | goto retry_pre_get; | |
1752 | } | |
1753 | ||
1754 | ttm_bo_vm_insert_rb(bo); | |
1755 | write_unlock(&bdev->vm_lock); | |
1756 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1757 | ||
1758 | return 0; | |
1759 | out_unlock: | |
1760 | write_unlock(&bdev->vm_lock); | |
1761 | return ret; | |
1762 | } | |
1763 | ||
1764 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1717c0e2 | 1765 | bool lazy, bool interruptible, bool no_wait) |
ba4e7d97 TH |
1766 | { |
1767 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
702adba2 | 1768 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 1769 | void *sync_obj; |
ba4e7d97 TH |
1770 | int ret = 0; |
1771 | ||
1717c0e2 | 1772 | if (likely(bo->sync_obj == NULL)) |
ba4e7d97 TH |
1773 | return 0; |
1774 | ||
1717c0e2 | 1775 | while (bo->sync_obj) { |
ba4e7d97 | 1776 | |
dedfdffd | 1777 | if (driver->sync_obj_signaled(bo->sync_obj)) { |
1717c0e2 DA |
1778 | void *tmp_obj = bo->sync_obj; |
1779 | bo->sync_obj = NULL; | |
1780 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1781 | spin_unlock(&bdev->fence_lock); | |
1782 | driver->sync_obj_unref(&tmp_obj); | |
1783 | spin_lock(&bdev->fence_lock); | |
ba4e7d97 TH |
1784 | continue; |
1785 | } | |
1786 | ||
1787 | if (no_wait) | |
1788 | return -EBUSY; | |
1789 | ||
1717c0e2 | 1790 | sync_obj = driver->sync_obj_ref(bo->sync_obj); |
702adba2 | 1791 | spin_unlock(&bdev->fence_lock); |
dedfdffd | 1792 | ret = driver->sync_obj_wait(sync_obj, |
ba4e7d97 TH |
1793 | lazy, interruptible); |
1794 | if (unlikely(ret != 0)) { | |
1795 | driver->sync_obj_unref(&sync_obj); | |
702adba2 | 1796 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1797 | return ret; |
1798 | } | |
702adba2 | 1799 | spin_lock(&bdev->fence_lock); |
5fb4ef0e | 1800 | if (likely(bo->sync_obj == sync_obj)) { |
1717c0e2 DA |
1801 | void *tmp_obj = bo->sync_obj; |
1802 | bo->sync_obj = NULL; | |
1803 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1804 | &bo->priv_flags); | |
1805 | spin_unlock(&bdev->fence_lock); | |
1806 | driver->sync_obj_unref(&sync_obj); | |
1807 | driver->sync_obj_unref(&tmp_obj); | |
1808 | spin_lock(&bdev->fence_lock); | |
fee280d3 | 1809 | } else { |
702adba2 | 1810 | spin_unlock(&bdev->fence_lock); |
fee280d3 | 1811 | driver->sync_obj_unref(&sync_obj); |
702adba2 | 1812 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1813 | } |
1814 | } | |
1815 | return 0; | |
1816 | } | |
1817 | EXPORT_SYMBOL(ttm_bo_wait); | |
1818 | ||
ba4e7d97 TH |
1819 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1820 | { | |
702adba2 | 1821 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1822 | int ret = 0; |
1823 | ||
1824 | /* | |
8cfe92d6 | 1825 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1826 | */ |
1827 | ||
1828 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1829 | if (unlikely(ret != 0)) | |
1830 | return ret; | |
702adba2 | 1831 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1832 | ret = ttm_bo_wait(bo, false, true, no_wait); |
702adba2 | 1833 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1834 | if (likely(ret == 0)) |
1835 | atomic_inc(&bo->cpu_writers); | |
1836 | ttm_bo_unreserve(bo); | |
1837 | return ret; | |
1838 | } | |
d1ede145 | 1839 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1840 | |
1841 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1842 | { | |
654aa792 | 1843 | atomic_dec(&bo->cpu_writers); |
ba4e7d97 | 1844 | } |
d1ede145 | 1845 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1846 | |
1847 | /** | |
1848 | * A buffer object shrink method that tries to swap out the first | |
1849 | * buffer object on the bo_global::swap_lru list. | |
1850 | */ | |
1851 | ||
1852 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1853 | { | |
a987fcaa TH |
1854 | struct ttm_bo_global *glob = |
1855 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1856 | struct ttm_buffer_object *bo; |
1857 | int ret = -EBUSY; | |
1858 | int put_count; | |
1859 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1860 | ||
a987fcaa | 1861 | spin_lock(&glob->lru_lock); |
2b7b3ad2 | 1862 | list_for_each_entry(bo, &glob->swap_lru, swap) { |
63d0a419 | 1863 | ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
2b7b3ad2 ML |
1864 | if (!ret) |
1865 | break; | |
1866 | } | |
85b144f8 | 1867 | |
2b7b3ad2 ML |
1868 | if (ret) { |
1869 | spin_unlock(&glob->lru_lock); | |
1870 | return ret; | |
1871 | } | |
e1efc9b6 | 1872 | |
2b7b3ad2 | 1873 | kref_get(&bo->list_kref); |
ba4e7d97 | 1874 | |
2b7b3ad2 ML |
1875 | if (!list_empty(&bo->ddestroy)) { |
1876 | ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false); | |
1877 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1878 | return ret; | |
ba4e7d97 TH |
1879 | } |
1880 | ||
ba4e7d97 | 1881 | put_count = ttm_bo_del_from_lru(bo); |
a987fcaa | 1882 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1883 | |
d6ea8886 | 1884 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
1885 | |
1886 | /** | |
1887 | * Wait for GPU, then move to system cached. | |
1888 | */ | |
1889 | ||
702adba2 | 1890 | spin_lock(&bo->bdev->fence_lock); |
1717c0e2 | 1891 | ret = ttm_bo_wait(bo, false, false, false); |
702adba2 | 1892 | spin_unlock(&bo->bdev->fence_lock); |
ba4e7d97 TH |
1893 | |
1894 | if (unlikely(ret != 0)) | |
1895 | goto out; | |
1896 | ||
1897 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1898 | struct ttm_mem_reg evict_mem; | |
1899 | ||
1900 | evict_mem = bo->mem; | |
1901 | evict_mem.mm_node = NULL; | |
1902 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1903 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1904 | ||
1905 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
97a875cb | 1906 | false, false); |
ba4e7d97 TH |
1907 | if (unlikely(ret != 0)) |
1908 | goto out; | |
1909 | } | |
1910 | ||
1911 | ttm_bo_unmap_virtual(bo); | |
1912 | ||
1913 | /** | |
1914 | * Swap out. Buffer will be swapped in again as soon as | |
1915 | * anyone tries to access a ttm page. | |
1916 | */ | |
1917 | ||
3f09ea4e TH |
1918 | if (bo->bdev->driver->swap_notify) |
1919 | bo->bdev->driver->swap_notify(bo); | |
1920 | ||
5df23979 | 1921 | ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); |
ba4e7d97 TH |
1922 | out: |
1923 | ||
1924 | /** | |
1925 | * | |
1926 | * Unreserve without putting on LRU to avoid swapping out an | |
1927 | * already swapped buffer. | |
1928 | */ | |
1929 | ||
1930 | atomic_set(&bo->reserved, 0); | |
1931 | wake_up_all(&bo->event_queue); | |
1932 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1933 | return ret; | |
1934 | } | |
1935 | ||
1936 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1937 | { | |
a987fcaa | 1938 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1939 | ; |
1940 | } | |
e99e1e78 | 1941 | EXPORT_SYMBOL(ttm_bo_swapout_all); |