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ba4e7d97 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | /* | |
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
29 | */ | |
30 | ||
31 | #include "ttm/ttm_module.h" | |
32 | #include "ttm/ttm_bo_driver.h" | |
33 | #include "ttm/ttm_placement.h" | |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/file.h> | |
39 | #include <linux/module.h> | |
06fba6d4 | 40 | #include <asm/atomic.h> |
ba4e7d97 TH |
41 | |
42 | #define TTM_ASSERT_LOCKED(param) | |
43 | #define TTM_DEBUG(fmt, arg...) | |
44 | #define TTM_BO_HASH_ORDER 13 | |
45 | ||
46 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 | 47 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
a987fcaa TH |
48 | static void ttm_bo_global_kobj_release(struct kobject *kobj); |
49 | ||
50 | static struct attribute ttm_bo_count = { | |
51 | .name = "bo_count", | |
52 | .mode = S_IRUGO | |
53 | }; | |
54 | ||
fb53f862 JG |
55 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
56 | { | |
57 | int i; | |
58 | ||
59 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
60 | if (flags & (1 << i)) { | |
61 | *mem_type = i; | |
62 | return 0; | |
63 | } | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
5012f506 | 67 | static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
fb53f862 | 68 | { |
5012f506 JG |
69 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
70 | ||
fb53f862 JG |
71 | printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type); |
72 | printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type); | |
73 | printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags); | |
74 | printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset); | |
eb6d2c39 | 75 | printk(KERN_ERR TTM_PFX " size: %llu\n", man->size); |
fb53f862 JG |
76 | printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n", |
77 | man->available_caching); | |
78 | printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n", | |
79 | man->default_caching); | |
d961db75 BS |
80 | if (mem_type != TTM_PL_SYSTEM) |
81 | (*man->func->debug)(man, TTM_PFX); | |
fb53f862 JG |
82 | } |
83 | ||
84 | static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, | |
85 | struct ttm_placement *placement) | |
86 | { | |
fb53f862 JG |
87 | int i, ret, mem_type; |
88 | ||
eb6d2c39 | 89 | printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n", |
fb53f862 JG |
90 | bo, bo->mem.num_pages, bo->mem.size >> 10, |
91 | bo->mem.size >> 20); | |
92 | for (i = 0; i < placement->num_placement; i++) { | |
93 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
94 | &mem_type); | |
95 | if (ret) | |
96 | return; | |
fb53f862 JG |
97 | printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n", |
98 | i, placement->placement[i], mem_type); | |
5012f506 | 99 | ttm_mem_type_debug(bo->bdev, mem_type); |
fb53f862 JG |
100 | } |
101 | } | |
102 | ||
a987fcaa TH |
103 | static ssize_t ttm_bo_global_show(struct kobject *kobj, |
104 | struct attribute *attr, | |
105 | char *buffer) | |
106 | { | |
107 | struct ttm_bo_global *glob = | |
108 | container_of(kobj, struct ttm_bo_global, kobj); | |
109 | ||
110 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
111 | (unsigned long) atomic_read(&glob->bo_count)); | |
112 | } | |
113 | ||
114 | static struct attribute *ttm_bo_global_attrs[] = { | |
115 | &ttm_bo_count, | |
116 | NULL | |
117 | }; | |
118 | ||
52cf25d0 | 119 | static const struct sysfs_ops ttm_bo_global_ops = { |
a987fcaa TH |
120 | .show = &ttm_bo_global_show |
121 | }; | |
122 | ||
123 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
124 | .release = &ttm_bo_global_kobj_release, | |
125 | .sysfs_ops = &ttm_bo_global_ops, | |
126 | .default_attrs = ttm_bo_global_attrs | |
127 | }; | |
128 | ||
ba4e7d97 TH |
129 | |
130 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
131 | { | |
132 | return 1 << (type); | |
133 | } | |
134 | ||
135 | static void ttm_bo_release_list(struct kref *list_kref) | |
136 | { | |
137 | struct ttm_buffer_object *bo = | |
138 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
139 | struct ttm_bo_device *bdev = bo->bdev; | |
140 | ||
141 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
142 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
143 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
144 | BUG_ON(bo->sync_obj != NULL); | |
145 | BUG_ON(bo->mem.mm_node != NULL); | |
146 | BUG_ON(!list_empty(&bo->lru)); | |
147 | BUG_ON(!list_empty(&bo->ddestroy)); | |
148 | ||
149 | if (bo->ttm) | |
150 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 151 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
152 | if (bo->destroy) |
153 | bo->destroy(bo); | |
154 | else { | |
a987fcaa | 155 | ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size); |
ba4e7d97 TH |
156 | kfree(bo); |
157 | } | |
158 | } | |
159 | ||
160 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
161 | { | |
ba4e7d97 | 162 | if (interruptible) { |
965d3807 | 163 | return wait_event_interruptible(bo->event_queue, |
ba4e7d97 | 164 | atomic_read(&bo->reserved) == 0); |
ba4e7d97 TH |
165 | } else { |
166 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
965d3807 | 167 | return 0; |
ba4e7d97 | 168 | } |
ba4e7d97 | 169 | } |
d1ede145 | 170 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 TH |
171 | |
172 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
173 | { | |
174 | struct ttm_bo_device *bdev = bo->bdev; | |
175 | struct ttm_mem_type_manager *man; | |
176 | ||
177 | BUG_ON(!atomic_read(&bo->reserved)); | |
178 | ||
179 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
180 | ||
181 | BUG_ON(!list_empty(&bo->lru)); | |
182 | ||
183 | man = &bdev->man[bo->mem.mem_type]; | |
184 | list_add_tail(&bo->lru, &man->lru); | |
185 | kref_get(&bo->list_kref); | |
186 | ||
187 | if (bo->ttm != NULL) { | |
a987fcaa | 188 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
189 | kref_get(&bo->list_kref); |
190 | } | |
191 | } | |
192 | } | |
193 | ||
194 | /** | |
195 | * Call with the lru_lock held. | |
196 | */ | |
197 | ||
198 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
199 | { | |
200 | int put_count = 0; | |
201 | ||
202 | if (!list_empty(&bo->swap)) { | |
203 | list_del_init(&bo->swap); | |
204 | ++put_count; | |
205 | } | |
206 | if (!list_empty(&bo->lru)) { | |
207 | list_del_init(&bo->lru); | |
208 | ++put_count; | |
209 | } | |
210 | ||
211 | /* | |
212 | * TODO: Add a driver hook to delete from | |
213 | * driver-specific LRU's here. | |
214 | */ | |
215 | ||
216 | return put_count; | |
217 | } | |
218 | ||
219 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
220 | bool interruptible, | |
221 | bool no_wait, bool use_sequence, uint32_t sequence) | |
222 | { | |
a987fcaa | 223 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
224 | int ret; |
225 | ||
226 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
227 | if (use_sequence && bo->seq_valid && | |
228 | (sequence - bo->val_seq < (1 << 31))) { | |
229 | return -EAGAIN; | |
230 | } | |
231 | ||
232 | if (no_wait) | |
233 | return -EBUSY; | |
234 | ||
a987fcaa | 235 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 236 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 237 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
238 | |
239 | if (unlikely(ret)) | |
240 | return ret; | |
241 | } | |
242 | ||
243 | if (use_sequence) { | |
244 | bo->val_seq = sequence; | |
245 | bo->seq_valid = true; | |
246 | } else { | |
247 | bo->seq_valid = false; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | EXPORT_SYMBOL(ttm_bo_reserve); | |
253 | ||
254 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
255 | { | |
256 | BUG(); | |
257 | } | |
258 | ||
259 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
260 | bool interruptible, | |
261 | bool no_wait, bool use_sequence, uint32_t sequence) | |
262 | { | |
a987fcaa | 263 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
264 | int put_count = 0; |
265 | int ret; | |
266 | ||
a987fcaa | 267 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
268 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
269 | sequence); | |
270 | if (likely(ret == 0)) | |
271 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 272 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
273 | |
274 | while (put_count--) | |
275 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
276 | ||
277 | return ret; | |
278 | } | |
279 | ||
280 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
281 | { | |
a987fcaa | 282 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 283 | |
a987fcaa | 284 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
285 | ttm_bo_add_to_lru(bo); |
286 | atomic_set(&bo->reserved, 0); | |
287 | wake_up_all(&bo->event_queue); | |
a987fcaa | 288 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
289 | } |
290 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
291 | ||
292 | /* | |
293 | * Call bo->mutex locked. | |
294 | */ | |
ba4e7d97 TH |
295 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
296 | { | |
297 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 298 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
299 | int ret = 0; |
300 | uint32_t page_flags = 0; | |
301 | ||
302 | TTM_ASSERT_LOCKED(&bo->mutex); | |
303 | bo->ttm = NULL; | |
304 | ||
ad49f501 DA |
305 | if (bdev->need_dma32) |
306 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
307 | ||
ba4e7d97 TH |
308 | switch (bo->type) { |
309 | case ttm_bo_type_device: | |
310 | if (zero_alloc) | |
311 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
312 | case ttm_bo_type_kernel: | |
313 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 314 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
315 | if (unlikely(bo->ttm == NULL)) |
316 | ret = -ENOMEM; | |
317 | break; | |
318 | case ttm_bo_type_user: | |
319 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
320 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 321 | glob->dummy_read_page); |
447aeb90 | 322 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 323 | ret = -ENOMEM; |
447aeb90 DA |
324 | break; |
325 | } | |
ba4e7d97 TH |
326 | |
327 | ret = ttm_tt_set_user(bo->ttm, current, | |
328 | bo->buffer_start, bo->num_pages); | |
329 | if (unlikely(ret != 0)) | |
330 | ttm_tt_destroy(bo->ttm); | |
331 | break; | |
332 | default: | |
333 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
334 | ret = -EINVAL; | |
335 | break; | |
336 | } | |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
341 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
342 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
343 | bool evict, bool interruptible, |
344 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
345 | { |
346 | struct ttm_bo_device *bdev = bo->bdev; | |
347 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
348 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
349 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
350 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
351 | int ret = 0; | |
352 | ||
353 | if (old_is_pci || new_is_pci || | |
354 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
355 | ttm_bo_unmap_virtual(bo); | |
356 | ||
357 | /* | |
358 | * Create and bind a ttm if required. | |
359 | */ | |
360 | ||
361 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
362 | ret = ttm_bo_add_ttm(bo, false); | |
363 | if (ret) | |
364 | goto out_err; | |
365 | ||
366 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
367 | if (ret) | |
87ef9209 | 368 | goto out_err; |
ba4e7d97 TH |
369 | |
370 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
371 | ret = ttm_tt_bind(bo->ttm, mem); | |
372 | if (ret) | |
373 | goto out_err; | |
374 | } | |
375 | ||
376 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 377 | bo->mem = *mem; |
ba4e7d97 | 378 | mem->mm_node = NULL; |
ba4e7d97 TH |
379 | goto moved; |
380 | } | |
381 | ||
382 | } | |
383 | ||
e024e110 DA |
384 | if (bdev->driver->move_notify) |
385 | bdev->driver->move_notify(bo, mem); | |
386 | ||
ba4e7d97 TH |
387 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
388 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 389 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
390 | else if (bdev->driver->move) |
391 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 392 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 393 | else |
9d87fa21 | 394 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
395 | |
396 | if (ret) | |
397 | goto out_err; | |
398 | ||
399 | moved: | |
400 | if (bo->evicted) { | |
401 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
402 | if (ret) | |
403 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
404 | bo->evicted = false; | |
405 | } | |
406 | ||
407 | if (bo->mem.mm_node) { | |
408 | spin_lock(&bo->lock); | |
d961db75 | 409 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
410 | bdev->man[bo->mem.mem_type].gpu_offset; |
411 | bo->cur_placement = bo->mem.placement; | |
412 | spin_unlock(&bo->lock); | |
354fb52c TH |
413 | } else |
414 | bo->offset = 0; | |
ba4e7d97 TH |
415 | |
416 | return 0; | |
417 | ||
418 | out_err: | |
419 | new_man = &bdev->man[bo->mem.mem_type]; | |
420 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
421 | ttm_tt_unbind(bo->ttm); | |
422 | ttm_tt_destroy(bo->ttm); | |
423 | bo->ttm = NULL; | |
424 | } | |
425 | ||
426 | return ret; | |
427 | } | |
428 | ||
1df6a2eb | 429 | /** |
40d857bb | 430 | * Call bo::reserved. |
1df6a2eb | 431 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
432 | * This is the place to put in driver specific hooks to release |
433 | * driver private resources. | |
434 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
435 | */ |
436 | ||
437 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
438 | { | |
1df6a2eb | 439 | if (bo->ttm) { |
1df6a2eb TH |
440 | ttm_tt_unbind(bo->ttm); |
441 | ttm_tt_destroy(bo->ttm); | |
442 | bo->ttm = NULL; | |
1df6a2eb TH |
443 | } |
444 | ||
40d857bb | 445 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
446 | |
447 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
448 | |
449 | /* | |
450 | * Make processes trying to reserve really pick it up. | |
451 | */ | |
452 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 453 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
454 | } |
455 | ||
e1efc9b6 | 456 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
457 | { |
458 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 459 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 460 | struct ttm_bo_driver *driver; |
aa123268 | 461 | void *sync_obj = NULL; |
e1efc9b6 TH |
462 | void *sync_obj_arg; |
463 | int put_count; | |
ba4e7d97 TH |
464 | int ret; |
465 | ||
466 | spin_lock(&bo->lock); | |
e1efc9b6 | 467 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 468 | if (!bo->sync_obj) { |
ba4e7d97 | 469 | |
a987fcaa | 470 | spin_lock(&glob->lru_lock); |
aaa20736 | 471 | |
1df6a2eb | 472 | /** |
e1efc9b6 TH |
473 | * Lock inversion between bo::reserve and bo::lock here, |
474 | * but that's OK, since we're only trylocking. | |
1df6a2eb TH |
475 | */ |
476 | ||
e1efc9b6 | 477 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 478 | |
e1efc9b6 TH |
479 | if (unlikely(ret == -EBUSY)) |
480 | goto queue; | |
1df6a2eb | 481 | |
e1efc9b6 | 482 | spin_unlock(&bo->lock); |
1df6a2eb | 483 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 484 | |
40d857bb | 485 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 486 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 TH |
487 | |
488 | while (put_count--) | |
aaa20736 | 489 | kref_put(&bo->list_kref, ttm_bo_ref_bug); |
ba4e7d97 | 490 | |
e1efc9b6 TH |
491 | return; |
492 | } else { | |
493 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 494 | } |
e1efc9b6 | 495 | queue: |
e1efc9b6 | 496 | driver = bdev->driver; |
aa123268 TH |
497 | if (bo->sync_obj) |
498 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
499 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
500 | |
501 | kref_get(&bo->list_kref); | |
502 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
503 | spin_unlock(&glob->lru_lock); | |
504 | spin_unlock(&bo->lock); | |
505 | ||
aa123268 | 506 | if (sync_obj) { |
e1efc9b6 | 507 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
508 | driver->sync_obj_unref(&sync_obj); |
509 | } | |
e1efc9b6 TH |
510 | schedule_delayed_work(&bdev->wq, |
511 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
512 | } | |
513 | ||
514 | /** | |
515 | * function ttm_bo_cleanup_refs | |
516 | * If bo idle, remove from delayed- and lru lists, and unref. | |
517 | * If not idle, do nothing. | |
518 | * | |
519 | * @interruptible Any sleeps should occur interruptibly. | |
520 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
521 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
522 | */ | |
523 | ||
524 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
525 | bool interruptible, | |
526 | bool no_wait_reserve, | |
527 | bool no_wait_gpu) | |
528 | { | |
529 | struct ttm_bo_global *glob = bo->glob; | |
530 | int put_count; | |
531 | int ret = 0; | |
532 | ||
533 | retry: | |
534 | spin_lock(&bo->lock); | |
535 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); | |
536 | spin_unlock(&bo->lock); | |
537 | ||
538 | if (unlikely(ret != 0)) | |
539 | return ret; | |
540 | ||
a987fcaa | 541 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
542 | ret = ttm_bo_reserve_locked(bo, interruptible, |
543 | no_wait_reserve, false, 0); | |
ba4e7d97 | 544 | |
e1efc9b6 | 545 | if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) { |
a987fcaa | 546 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
547 | return ret; |
548 | } | |
ba4e7d97 | 549 | |
e1efc9b6 TH |
550 | /** |
551 | * We can re-check for sync object without taking | |
552 | * the bo::lock since setting the sync object requires | |
553 | * also bo::reserved. A busy object at this point may | |
554 | * be caused by another thread recently starting an accelerated | |
555 | * eviction. | |
556 | */ | |
ba4e7d97 | 557 | |
e1efc9b6 TH |
558 | if (unlikely(bo->sync_obj)) { |
559 | atomic_set(&bo->reserved, 0); | |
560 | wake_up_all(&bo->event_queue); | |
a987fcaa | 561 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 562 | goto retry; |
ba4e7d97 TH |
563 | } |
564 | ||
e1efc9b6 TH |
565 | put_count = ttm_bo_del_from_lru(bo); |
566 | list_del_init(&bo->ddestroy); | |
567 | ++put_count; | |
568 | ||
569 | spin_unlock(&glob->lru_lock); | |
570 | ttm_bo_cleanup_memtype_use(bo); | |
571 | ||
572 | while (put_count--) | |
573 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
574 | ||
575 | return 0; | |
ba4e7d97 TH |
576 | } |
577 | ||
578 | /** | |
579 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
580 | * encountered buffers. | |
581 | */ | |
582 | ||
583 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
584 | { | |
a987fcaa | 585 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
586 | struct ttm_buffer_object *entry = NULL; |
587 | int ret = 0; | |
ba4e7d97 | 588 | |
a987fcaa | 589 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
590 | if (list_empty(&bdev->ddestroy)) |
591 | goto out_unlock; | |
592 | ||
593 | entry = list_first_entry(&bdev->ddestroy, | |
594 | struct ttm_buffer_object, ddestroy); | |
595 | kref_get(&entry->list_kref); | |
596 | ||
597 | for (;;) { | |
598 | struct ttm_buffer_object *nentry = NULL; | |
599 | ||
600 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
601 | nentry = list_first_entry(&entry->ddestroy, | |
602 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
603 | kref_get(&nentry->list_kref); |
604 | } | |
ba4e7d97 | 605 | |
a987fcaa | 606 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
607 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
608 | !remove_all); | |
ba4e7d97 | 609 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
610 | entry = nentry; |
611 | ||
612 | if (ret || !entry) | |
613 | goto out; | |
ba4e7d97 | 614 | |
a987fcaa | 615 | spin_lock(&glob->lru_lock); |
1a961ce0 | 616 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
617 | break; |
618 | } | |
ba4e7d97 | 619 | |
1a961ce0 LB |
620 | out_unlock: |
621 | spin_unlock(&glob->lru_lock); | |
622 | out: | |
623 | if (entry) | |
624 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
625 | return ret; |
626 | } | |
627 | ||
628 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
629 | { | |
630 | struct ttm_bo_device *bdev = | |
631 | container_of(work, struct ttm_bo_device, wq.work); | |
632 | ||
633 | if (ttm_bo_delayed_delete(bdev, false)) { | |
634 | schedule_delayed_work(&bdev->wq, | |
635 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
636 | } | |
637 | } | |
638 | ||
639 | static void ttm_bo_release(struct kref *kref) | |
640 | { | |
641 | struct ttm_buffer_object *bo = | |
642 | container_of(kref, struct ttm_buffer_object, kref); | |
643 | struct ttm_bo_device *bdev = bo->bdev; | |
644 | ||
645 | if (likely(bo->vm_node != NULL)) { | |
646 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
647 | drm_mm_put_block(bo->vm_node); | |
648 | bo->vm_node = NULL; | |
649 | } | |
650 | write_unlock(&bdev->vm_lock); | |
e1efc9b6 | 651 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
652 | kref_put(&bo->list_kref, ttm_bo_release_list); |
653 | write_lock(&bdev->vm_lock); | |
654 | } | |
655 | ||
656 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
657 | { | |
658 | struct ttm_buffer_object *bo = *p_bo; | |
659 | struct ttm_bo_device *bdev = bo->bdev; | |
660 | ||
661 | *p_bo = NULL; | |
662 | write_lock(&bdev->vm_lock); | |
663 | kref_put(&bo->kref, ttm_bo_release); | |
664 | write_unlock(&bdev->vm_lock); | |
665 | } | |
666 | EXPORT_SYMBOL(ttm_bo_unref); | |
667 | ||
7c5ee536 MG |
668 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
669 | { | |
670 | return cancel_delayed_work_sync(&bdev->wq); | |
671 | } | |
672 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
673 | ||
674 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
675 | { | |
676 | if (resched) | |
677 | schedule_delayed_work(&bdev->wq, | |
678 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
679 | } | |
680 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
681 | ||
ca262a99 | 682 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 683 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 684 | { |
ba4e7d97 TH |
685 | struct ttm_bo_device *bdev = bo->bdev; |
686 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
687 | struct ttm_placement placement; |
688 | int ret = 0; | |
ba4e7d97 TH |
689 | |
690 | spin_lock(&bo->lock); | |
9d87fa21 | 691 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 TH |
692 | spin_unlock(&bo->lock); |
693 | ||
78ecf091 | 694 | if (unlikely(ret != 0)) { |
98ffc415 | 695 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
696 | printk(KERN_ERR TTM_PFX |
697 | "Failed to expire sync object before " | |
698 | "buffer eviction.\n"); | |
699 | } | |
ba4e7d97 TH |
700 | goto out; |
701 | } | |
702 | ||
703 | BUG_ON(!atomic_read(&bo->reserved)); | |
704 | ||
705 | evict_mem = bo->mem; | |
706 | evict_mem.mm_node = NULL; | |
82c5da6b | 707 | evict_mem.bus.io_reserved = false; |
ba4e7d97 | 708 | |
7cb7d1d7 JG |
709 | placement.fpfn = 0; |
710 | placement.lpfn = 0; | |
711 | placement.num_placement = 0; | |
712 | placement.num_busy_placement = 0; | |
ca262a99 JG |
713 | bdev->driver->evict_flags(bo, &placement); |
714 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 715 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 716 | if (ret) { |
fb53f862 | 717 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
718 | printk(KERN_ERR TTM_PFX |
719 | "Failed to find memory space for " | |
720 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
721 | ttm_bo_mem_space_debug(bo, &placement); |
722 | } | |
ba4e7d97 TH |
723 | goto out; |
724 | } | |
725 | ||
726 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 727 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 728 | if (ret) { |
98ffc415 | 729 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 730 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 731 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
732 | goto out; |
733 | } | |
ca262a99 JG |
734 | bo->evicted = true; |
735 | out: | |
736 | return ret; | |
737 | } | |
738 | ||
739 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
740 | uint32_t mem_type, | |
9d87fa21 JG |
741 | bool interruptible, bool no_wait_reserve, |
742 | bool no_wait_gpu) | |
ca262a99 JG |
743 | { |
744 | struct ttm_bo_global *glob = bdev->glob; | |
745 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
746 | struct ttm_buffer_object *bo; | |
747 | int ret, put_count = 0; | |
ba4e7d97 | 748 | |
9c51ba1d | 749 | retry: |
a987fcaa | 750 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
751 | if (list_empty(&man->lru)) { |
752 | spin_unlock(&glob->lru_lock); | |
753 | return -EBUSY; | |
754 | } | |
755 | ||
ca262a99 JG |
756 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
757 | kref_get(&bo->list_kref); | |
9c51ba1d | 758 | |
e1efc9b6 TH |
759 | if (!list_empty(&bo->ddestroy)) { |
760 | spin_unlock(&glob->lru_lock); | |
761 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
762 | no_wait_reserve, no_wait_gpu); | |
763 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
764 | ||
765 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
766 | return ret; | |
767 | ||
768 | goto retry; | |
769 | } | |
770 | ||
9d87fa21 | 771 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
772 | |
773 | if (unlikely(ret == -EBUSY)) { | |
774 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 775 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
776 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
777 | ||
778 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
779 | ||
780 | /** | |
781 | * We *need* to retry after releasing the lru lock. | |
782 | */ | |
783 | ||
784 | if (unlikely(ret != 0)) | |
785 | return ret; | |
786 | goto retry; | |
787 | } | |
788 | ||
789 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 790 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
791 | |
792 | BUG_ON(ret != 0); | |
793 | ||
ca262a99 JG |
794 | while (put_count--) |
795 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
9c51ba1d | 796 | |
9d87fa21 | 797 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 798 | ttm_bo_unreserve(bo); |
9c51ba1d | 799 | |
ca262a99 | 800 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
801 | return ret; |
802 | } | |
803 | ||
42311ff9 BS |
804 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
805 | { | |
d961db75 | 806 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 807 | |
d961db75 BS |
808 | if (mem->mm_node) |
809 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
810 | } |
811 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
812 | ||
ba4e7d97 TH |
813 | /** |
814 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
815 | * space, or we've evicted everything and there isn't enough space. | |
816 | */ | |
ca262a99 JG |
817 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
818 | uint32_t mem_type, | |
819 | struct ttm_placement *placement, | |
820 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
821 | bool interruptible, |
822 | bool no_wait_reserve, | |
823 | bool no_wait_gpu) | |
ba4e7d97 | 824 | { |
ca262a99 | 825 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 826 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
827 | int ret; |
828 | ||
ba4e7d97 | 829 | do { |
d961db75 | 830 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
831 | if (unlikely(ret != 0)) |
832 | return ret; | |
d961db75 | 833 | if (mem->mm_node) |
ba4e7d97 | 834 | break; |
ca262a99 | 835 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 836 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
837 | if (unlikely(ret != 0)) |
838 | return ret; | |
ba4e7d97 | 839 | } while (1); |
d961db75 | 840 | if (mem->mm_node == NULL) |
ba4e7d97 | 841 | return -ENOMEM; |
ba4e7d97 TH |
842 | mem->mem_type = mem_type; |
843 | return 0; | |
844 | } | |
845 | ||
ae3e8122 TH |
846 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
847 | uint32_t cur_placement, | |
848 | uint32_t proposed_placement) | |
849 | { | |
850 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
851 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
852 | ||
853 | /** | |
854 | * Keep current caching if possible. | |
855 | */ | |
856 | ||
857 | if ((cur_placement & caching) != 0) | |
858 | result |= (cur_placement & caching); | |
859 | else if ((man->default_caching & caching) != 0) | |
860 | result |= man->default_caching; | |
861 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
862 | result |= TTM_PL_FLAG_CACHED; | |
863 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
864 | result |= TTM_PL_FLAG_WC; | |
865 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
866 | result |= TTM_PL_FLAG_UNCACHED; | |
867 | ||
868 | return result; | |
869 | } | |
870 | ||
ba4e7d97 TH |
871 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
872 | bool disallow_fixed, | |
873 | uint32_t mem_type, | |
ae3e8122 TH |
874 | uint32_t proposed_placement, |
875 | uint32_t *masked_placement) | |
ba4e7d97 TH |
876 | { |
877 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
878 | ||
879 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
880 | return false; | |
881 | ||
ae3e8122 | 882 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
883 | return false; |
884 | ||
ae3e8122 | 885 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 886 | return false; |
ba4e7d97 | 887 | |
ae3e8122 TH |
888 | cur_flags |= (proposed_placement & man->available_caching); |
889 | ||
890 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
891 | return true; |
892 | } | |
893 | ||
894 | /** | |
895 | * Creates space for memory region @mem according to its type. | |
896 | * | |
897 | * This function first searches for free space in compatible memory types in | |
898 | * the priority order defined by the driver. If free space isn't found, then | |
899 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
900 | * space. | |
901 | */ | |
902 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
903 | struct ttm_placement *placement, |
904 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
905 | bool interruptible, bool no_wait_reserve, |
906 | bool no_wait_gpu) | |
ba4e7d97 TH |
907 | { |
908 | struct ttm_bo_device *bdev = bo->bdev; | |
909 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
910 | uint32_t mem_type = TTM_PL_SYSTEM; |
911 | uint32_t cur_flags = 0; | |
912 | bool type_found = false; | |
913 | bool type_ok = false; | |
98ffc415 | 914 | bool has_erestartsys = false; |
ca262a99 | 915 | int i, ret; |
ba4e7d97 TH |
916 | |
917 | mem->mm_node = NULL; | |
b6637526 | 918 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
919 | ret = ttm_mem_type_from_flags(placement->placement[i], |
920 | &mem_type); | |
921 | if (ret) | |
922 | return ret; | |
ba4e7d97 TH |
923 | man = &bdev->man[mem_type]; |
924 | ||
925 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
926 | bo->type == ttm_bo_type_user, |
927 | mem_type, | |
928 | placement->placement[i], | |
929 | &cur_flags); | |
ba4e7d97 TH |
930 | |
931 | if (!type_ok) | |
932 | continue; | |
933 | ||
ae3e8122 TH |
934 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
935 | cur_flags); | |
ca262a99 JG |
936 | /* |
937 | * Use the access and other non-mapping-related flag bits from | |
938 | * the memory placement flags to the current flags | |
939 | */ | |
940 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
941 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 942 | |
ba4e7d97 TH |
943 | if (mem_type == TTM_PL_SYSTEM) |
944 | break; | |
945 | ||
946 | if (man->has_type && man->use_type) { | |
947 | type_found = true; | |
d961db75 | 948 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
949 | if (unlikely(ret)) |
950 | return ret; | |
ba4e7d97 | 951 | } |
d961db75 | 952 | if (mem->mm_node) |
ba4e7d97 TH |
953 | break; |
954 | } | |
955 | ||
d961db75 | 956 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
957 | mem->mem_type = mem_type; |
958 | mem->placement = cur_flags; | |
959 | return 0; | |
960 | } | |
961 | ||
962 | if (!type_found) | |
963 | return -EINVAL; | |
964 | ||
b6637526 DA |
965 | for (i = 0; i < placement->num_busy_placement; ++i) { |
966 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
967 | &mem_type); |
968 | if (ret) | |
969 | return ret; | |
ba4e7d97 | 970 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
971 | if (!man->has_type) |
972 | continue; | |
ba4e7d97 | 973 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
974 | bo->type == ttm_bo_type_user, |
975 | mem_type, | |
b6637526 | 976 | placement->busy_placement[i], |
ca262a99 | 977 | &cur_flags)) |
ba4e7d97 TH |
978 | continue; |
979 | ||
ae3e8122 TH |
980 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
981 | cur_flags); | |
ca262a99 JG |
982 | /* |
983 | * Use the access and other non-mapping-related flag bits from | |
984 | * the memory placement flags to the current flags | |
985 | */ | |
b6637526 | 986 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 987 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 988 | |
0eaddb28 TH |
989 | |
990 | if (mem_type == TTM_PL_SYSTEM) { | |
991 | mem->mem_type = mem_type; | |
992 | mem->placement = cur_flags; | |
993 | mem->mm_node = NULL; | |
994 | return 0; | |
995 | } | |
996 | ||
ca262a99 | 997 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 998 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
999 | if (ret == 0 && mem->mm_node) { |
1000 | mem->placement = cur_flags; | |
1001 | return 0; | |
1002 | } | |
98ffc415 TH |
1003 | if (ret == -ERESTARTSYS) |
1004 | has_erestartsys = true; | |
ba4e7d97 | 1005 | } |
98ffc415 | 1006 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1007 | return ret; |
1008 | } | |
1009 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1010 | ||
1011 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1012 | { | |
ba4e7d97 TH |
1013 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1014 | return -EBUSY; | |
1015 | ||
98ffc415 TH |
1016 | return wait_event_interruptible(bo->event_queue, |
1017 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1018 | } |
d1ede145 | 1019 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1020 | |
1021 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1022 | struct ttm_placement *placement, |
9d87fa21 JG |
1023 | bool interruptible, bool no_wait_reserve, |
1024 | bool no_wait_gpu) | |
ba4e7d97 | 1025 | { |
ba4e7d97 TH |
1026 | int ret = 0; |
1027 | struct ttm_mem_reg mem; | |
1028 | ||
1029 | BUG_ON(!atomic_read(&bo->reserved)); | |
1030 | ||
1031 | /* | |
1032 | * FIXME: It's possible to pipeline buffer moves. | |
1033 | * Have the driver move function wait for idle when necessary, | |
1034 | * instead of doing it here. | |
1035 | */ | |
ba4e7d97 | 1036 | spin_lock(&bo->lock); |
9d87fa21 | 1037 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 | 1038 | spin_unlock(&bo->lock); |
ba4e7d97 TH |
1039 | if (ret) |
1040 | return ret; | |
ba4e7d97 TH |
1041 | mem.num_pages = bo->num_pages; |
1042 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1043 | mem.page_alignment = bo->mem.page_alignment; | |
82c5da6b | 1044 | mem.bus.io_reserved = false; |
ba4e7d97 TH |
1045 | /* |
1046 | * Determine where to move the buffer. | |
1047 | */ | |
9d87fa21 | 1048 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1049 | if (ret) |
1050 | goto out_unlock; | |
9d87fa21 | 1051 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1052 | out_unlock: |
d961db75 BS |
1053 | if (ret && mem.mm_node) |
1054 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1055 | return ret; |
1056 | } | |
1057 | ||
ca262a99 | 1058 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1059 | struct ttm_mem_reg *mem) |
1060 | { | |
ca262a99 | 1061 | int i; |
e22238ea | 1062 | |
d961db75 BS |
1063 | if (mem->mm_node && placement->lpfn != 0 && |
1064 | (mem->start < placement->fpfn || | |
1065 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1066 | return -1; |
ca262a99 JG |
1067 | |
1068 | for (i = 0; i < placement->num_placement; i++) { | |
1069 | if ((placement->placement[i] & mem->placement & | |
1070 | TTM_PL_MASK_CACHING) && | |
1071 | (placement->placement[i] & mem->placement & | |
1072 | TTM_PL_MASK_MEM)) | |
1073 | return i; | |
1074 | } | |
1075 | return -1; | |
ba4e7d97 TH |
1076 | } |
1077 | ||
09855acb JG |
1078 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1079 | struct ttm_placement *placement, | |
9d87fa21 JG |
1080 | bool interruptible, bool no_wait_reserve, |
1081 | bool no_wait_gpu) | |
ba4e7d97 TH |
1082 | { |
1083 | int ret; | |
1084 | ||
1085 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1086 | /* Check that range is valid */ |
1087 | if (placement->lpfn || placement->fpfn) | |
1088 | if (placement->fpfn > placement->lpfn || | |
1089 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1090 | return -EINVAL; | |
ba4e7d97 TH |
1091 | /* |
1092 | * Check whether we need to move buffer. | |
1093 | */ | |
ca262a99 JG |
1094 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1095 | if (ret < 0) { | |
9d87fa21 | 1096 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1097 | if (ret) |
ba4e7d97 | 1098 | return ret; |
ca262a99 JG |
1099 | } else { |
1100 | /* | |
1101 | * Use the access and other non-mapping-related flag bits from | |
1102 | * the compatible memory placement flags to the active flags | |
1103 | */ | |
1104 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1105 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1106 | } |
ba4e7d97 TH |
1107 | /* |
1108 | * We might need to add a TTM. | |
1109 | */ | |
ba4e7d97 TH |
1110 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1111 | ret = ttm_bo_add_ttm(bo, true); | |
1112 | if (ret) | |
1113 | return ret; | |
1114 | } | |
ba4e7d97 TH |
1115 | return 0; |
1116 | } | |
09855acb | 1117 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1118 | |
09855acb JG |
1119 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1120 | struct ttm_placement *placement) | |
ba4e7d97 | 1121 | { |
29e190e0 TH |
1122 | BUG_ON((placement->fpfn || placement->lpfn) && |
1123 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1124 | |
ba4e7d97 TH |
1125 | return 0; |
1126 | } | |
1127 | ||
09855acb JG |
1128 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1129 | struct ttm_buffer_object *bo, | |
1130 | unsigned long size, | |
1131 | enum ttm_bo_type type, | |
1132 | struct ttm_placement *placement, | |
1133 | uint32_t page_alignment, | |
1134 | unsigned long buffer_start, | |
1135 | bool interruptible, | |
1136 | struct file *persistant_swap_storage, | |
1137 | size_t acc_size, | |
1138 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1139 | { |
09855acb | 1140 | int ret = 0; |
ba4e7d97 TH |
1141 | unsigned long num_pages; |
1142 | ||
1143 | size += buffer_start & ~PAGE_MASK; | |
1144 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1145 | if (num_pages == 0) { | |
1146 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
7dfbbdcf TH |
1147 | if (destroy) |
1148 | (*destroy)(bo); | |
1149 | else | |
1150 | kfree(bo); | |
ba4e7d97 TH |
1151 | return -EINVAL; |
1152 | } | |
1153 | bo->destroy = destroy; | |
1154 | ||
1155 | spin_lock_init(&bo->lock); | |
1156 | kref_init(&bo->kref); | |
1157 | kref_init(&bo->list_kref); | |
1158 | atomic_set(&bo->cpu_writers, 0); | |
1159 | atomic_set(&bo->reserved, 1); | |
1160 | init_waitqueue_head(&bo->event_queue); | |
1161 | INIT_LIST_HEAD(&bo->lru); | |
1162 | INIT_LIST_HEAD(&bo->ddestroy); | |
1163 | INIT_LIST_HEAD(&bo->swap); | |
1164 | bo->bdev = bdev; | |
a987fcaa | 1165 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1166 | bo->type = type; |
1167 | bo->num_pages = num_pages; | |
eb6d2c39 | 1168 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1169 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1170 | bo->mem.num_pages = bo->num_pages; | |
1171 | bo->mem.mm_node = NULL; | |
1172 | bo->mem.page_alignment = page_alignment; | |
82c5da6b | 1173 | bo->mem.bus.io_reserved = false; |
ba4e7d97 TH |
1174 | bo->buffer_start = buffer_start & PAGE_MASK; |
1175 | bo->priv_flags = 0; | |
1176 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1177 | bo->seq_valid = false; | |
1178 | bo->persistant_swap_storage = persistant_swap_storage; | |
1179 | bo->acc_size = acc_size; | |
a987fcaa | 1180 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1181 | |
09855acb | 1182 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1183 | if (unlikely(ret != 0)) |
1184 | goto out_err; | |
1185 | ||
ba4e7d97 TH |
1186 | /* |
1187 | * For ttm_bo_type_device buffers, allocate | |
1188 | * address space from the device. | |
1189 | */ | |
ba4e7d97 TH |
1190 | if (bo->type == ttm_bo_type_device) { |
1191 | ret = ttm_bo_setup_vm(bo); | |
1192 | if (ret) | |
1193 | goto out_err; | |
1194 | } | |
1195 | ||
9d87fa21 | 1196 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1197 | if (ret) |
1198 | goto out_err; | |
1199 | ||
1200 | ttm_bo_unreserve(bo); | |
1201 | return 0; | |
1202 | ||
1203 | out_err: | |
1204 | ttm_bo_unreserve(bo); | |
1205 | ttm_bo_unref(&bo); | |
1206 | ||
1207 | return ret; | |
1208 | } | |
09855acb | 1209 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1210 | |
a987fcaa | 1211 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1212 | unsigned long num_pages) |
1213 | { | |
1214 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1215 | PAGE_MASK; | |
1216 | ||
a987fcaa | 1217 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1218 | } |
1219 | ||
09855acb JG |
1220 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1221 | unsigned long size, | |
1222 | enum ttm_bo_type type, | |
1223 | struct ttm_placement *placement, | |
1224 | uint32_t page_alignment, | |
1225 | unsigned long buffer_start, | |
1226 | bool interruptible, | |
1227 | struct file *persistant_swap_storage, | |
1228 | struct ttm_buffer_object **p_bo) | |
ba4e7d97 TH |
1229 | { |
1230 | struct ttm_buffer_object *bo; | |
a987fcaa | 1231 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1232 | int ret; |
ba4e7d97 TH |
1233 | |
1234 | size_t acc_size = | |
a987fcaa | 1235 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1236 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1237 | if (unlikely(ret != 0)) |
1238 | return ret; | |
1239 | ||
1240 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1241 | ||
1242 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1243 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1244 | return -ENOMEM; |
1245 | } | |
1246 | ||
09855acb JG |
1247 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1248 | buffer_start, interruptible, | |
1249 | persistant_swap_storage, acc_size, NULL); | |
ba4e7d97 TH |
1250 | if (likely(ret == 0)) |
1251 | *p_bo = bo; | |
1252 | ||
1253 | return ret; | |
1254 | } | |
1255 | ||
ba4e7d97 | 1256 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1257 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1258 | { |
ca262a99 | 1259 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1260 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1261 | int ret; |
ba4e7d97 TH |
1262 | |
1263 | /* | |
1264 | * Can't use standard list traversal since we're unlocking. | |
1265 | */ | |
1266 | ||
a987fcaa | 1267 | spin_lock(&glob->lru_lock); |
ca262a99 | 1268 | while (!list_empty(&man->lru)) { |
a987fcaa | 1269 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1270 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1271 | if (ret) { |
1272 | if (allow_errors) { | |
1273 | return ret; | |
1274 | } else { | |
1275 | printk(KERN_ERR TTM_PFX | |
1276 | "Cleanup eviction failed\n"); | |
1277 | } | |
1278 | } | |
a987fcaa | 1279 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1280 | } |
a987fcaa | 1281 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1282 | return 0; |
1283 | } | |
1284 | ||
1285 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1286 | { | |
c96e7c7a | 1287 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1288 | int ret = -EINVAL; |
1289 | ||
1290 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1291 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1292 | return ret; | |
1293 | } | |
c96e7c7a | 1294 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1295 | |
1296 | if (!man->has_type) { | |
1297 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1298 | "memory manager type %u\n", mem_type); | |
1299 | return ret; | |
1300 | } | |
1301 | ||
1302 | man->use_type = false; | |
1303 | man->has_type = false; | |
1304 | ||
1305 | ret = 0; | |
1306 | if (mem_type > 0) { | |
ca262a99 | 1307 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1308 | |
d961db75 | 1309 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1310 | } |
1311 | ||
1312 | return ret; | |
1313 | } | |
1314 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1315 | ||
1316 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1317 | { | |
1318 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1319 | ||
1320 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1321 | printk(KERN_ERR TTM_PFX | |
1322 | "Illegal memory manager memory type %u.\n", | |
1323 | mem_type); | |
1324 | return -EINVAL; | |
1325 | } | |
1326 | ||
1327 | if (!man->has_type) { | |
1328 | printk(KERN_ERR TTM_PFX | |
1329 | "Memory type %u has not been initialized.\n", | |
1330 | mem_type); | |
1331 | return 0; | |
1332 | } | |
1333 | ||
ca262a99 | 1334 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1335 | } |
1336 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1337 | ||
1338 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1339 | unsigned long p_size) |
ba4e7d97 TH |
1340 | { |
1341 | int ret = -EINVAL; | |
1342 | struct ttm_mem_type_manager *man; | |
1343 | ||
dbc4a5b8 | 1344 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1345 | man = &bdev->man[type]; |
dbc4a5b8 | 1346 | BUG_ON(man->has_type); |
ba4e7d97 TH |
1347 | |
1348 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1349 | if (ret) | |
1350 | return ret; | |
d961db75 | 1351 | man->bdev = bdev; |
ba4e7d97 TH |
1352 | |
1353 | ret = 0; | |
1354 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1355 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1356 | if (ret) |
1357 | return ret; | |
1358 | } | |
1359 | man->has_type = true; | |
1360 | man->use_type = true; | |
1361 | man->size = p_size; | |
1362 | ||
1363 | INIT_LIST_HEAD(&man->lru); | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1368 | ||
a987fcaa TH |
1369 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1370 | { | |
1371 | struct ttm_bo_global *glob = | |
1372 | container_of(kobj, struct ttm_bo_global, kobj); | |
1373 | ||
a987fcaa TH |
1374 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1375 | __free_page(glob->dummy_read_page); | |
1376 | kfree(glob); | |
1377 | } | |
1378 | ||
ba4420c2 | 1379 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1380 | { |
1381 | struct ttm_bo_global *glob = ref->object; | |
1382 | ||
1383 | kobject_del(&glob->kobj); | |
1384 | kobject_put(&glob->kobj); | |
1385 | } | |
1386 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1387 | ||
ba4420c2 | 1388 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1389 | { |
1390 | struct ttm_bo_global_ref *bo_ref = | |
1391 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1392 | struct ttm_bo_global *glob = ref->object; | |
1393 | int ret; | |
1394 | ||
1395 | mutex_init(&glob->device_list_mutex); | |
1396 | spin_lock_init(&glob->lru_lock); | |
1397 | glob->mem_glob = bo_ref->mem_glob; | |
1398 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1399 | ||
1400 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1401 | ret = -ENOMEM; | |
1402 | goto out_no_drp; | |
1403 | } | |
1404 | ||
1405 | INIT_LIST_HEAD(&glob->swap_lru); | |
1406 | INIT_LIST_HEAD(&glob->device_list); | |
1407 | ||
1408 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1409 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1410 | if (unlikely(ret != 0)) { | |
1411 | printk(KERN_ERR TTM_PFX | |
1412 | "Could not register buffer object swapout.\n"); | |
1413 | goto out_no_shrink; | |
1414 | } | |
1415 | ||
1416 | glob->ttm_bo_extra_size = | |
1417 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1418 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1419 | ||
1420 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1421 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1422 | ||
1423 | atomic_set(&glob->bo_count, 0); | |
1424 | ||
b642ed06 RD |
1425 | ret = kobject_init_and_add( |
1426 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1427 | if (unlikely(ret != 0)) |
1428 | kobject_put(&glob->kobj); | |
1429 | return ret; | |
1430 | out_no_shrink: | |
1431 | __free_page(glob->dummy_read_page); | |
1432 | out_no_drp: | |
1433 | kfree(glob); | |
1434 | return ret; | |
1435 | } | |
1436 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1437 | ||
1438 | ||
ba4e7d97 TH |
1439 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1440 | { | |
1441 | int ret = 0; | |
1442 | unsigned i = TTM_NUM_MEM_TYPES; | |
1443 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1444 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1445 | |
1446 | while (i--) { | |
1447 | man = &bdev->man[i]; | |
1448 | if (man->has_type) { | |
1449 | man->use_type = false; | |
1450 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1451 | ret = -EBUSY; | |
1452 | printk(KERN_ERR TTM_PFX | |
1453 | "DRM memory manager type %d " | |
1454 | "is not clean.\n", i); | |
1455 | } | |
1456 | man->has_type = false; | |
1457 | } | |
1458 | } | |
1459 | ||
a987fcaa TH |
1460 | mutex_lock(&glob->device_list_mutex); |
1461 | list_del(&bdev->device_list); | |
1462 | mutex_unlock(&glob->device_list_mutex); | |
1463 | ||
ba4e7d97 TH |
1464 | if (!cancel_delayed_work(&bdev->wq)) |
1465 | flush_scheduled_work(); | |
1466 | ||
1467 | while (ttm_bo_delayed_delete(bdev, true)) | |
1468 | ; | |
1469 | ||
a987fcaa | 1470 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1471 | if (list_empty(&bdev->ddestroy)) |
1472 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1473 | ||
1474 | if (list_empty(&bdev->man[0].lru)) | |
1475 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1476 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1477 | |
ba4e7d97 TH |
1478 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1479 | write_lock(&bdev->vm_lock); | |
1480 | drm_mm_takedown(&bdev->addr_space_mm); | |
1481 | write_unlock(&bdev->vm_lock); | |
1482 | ||
ba4e7d97 TH |
1483 | return ret; |
1484 | } | |
1485 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1486 | ||
ba4e7d97 | 1487 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1488 | struct ttm_bo_global *glob, |
1489 | struct ttm_bo_driver *driver, | |
51c8b407 | 1490 | uint64_t file_page_offset, |
ad49f501 | 1491 | bool need_dma32) |
ba4e7d97 TH |
1492 | { |
1493 | int ret = -EINVAL; | |
1494 | ||
ba4e7d97 | 1495 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1496 | bdev->driver = driver; |
ba4e7d97 TH |
1497 | |
1498 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1499 | ||
ba4e7d97 TH |
1500 | /* |
1501 | * Initialize the system memory buffer type. | |
1502 | * Other types need to be driver / IOCTL initialized. | |
1503 | */ | |
ca262a99 | 1504 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1505 | if (unlikely(ret != 0)) |
a987fcaa | 1506 | goto out_no_sys; |
ba4e7d97 TH |
1507 | |
1508 | bdev->addr_space_rb = RB_ROOT; | |
1509 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1510 | if (unlikely(ret != 0)) | |
a987fcaa | 1511 | goto out_no_addr_mm; |
ba4e7d97 TH |
1512 | |
1513 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1514 | bdev->nice_mode = true; | |
1515 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1516 | bdev->dev_mapping = NULL; |
a987fcaa | 1517 | bdev->glob = glob; |
ad49f501 | 1518 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1519 | |
a987fcaa TH |
1520 | mutex_lock(&glob->device_list_mutex); |
1521 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1522 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1523 | |
1524 | return 0; | |
a987fcaa | 1525 | out_no_addr_mm: |
ba4e7d97 | 1526 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1527 | out_no_sys: |
ba4e7d97 TH |
1528 | return ret; |
1529 | } | |
1530 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1531 | ||
1532 | /* | |
1533 | * buffer object vm functions. | |
1534 | */ | |
1535 | ||
1536 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1537 | { | |
1538 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1539 | ||
1540 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1541 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1542 | return false; | |
1543 | ||
1544 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1545 | return false; | |
1546 | ||
1547 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1548 | return false; | |
1549 | } | |
1550 | return true; | |
1551 | } | |
1552 | ||
ba4e7d97 TH |
1553 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) |
1554 | { | |
1555 | struct ttm_bo_device *bdev = bo->bdev; | |
1556 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1557 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1558 | ||
1559 | if (!bdev->dev_mapping) | |
1560 | return; | |
ba4e7d97 | 1561 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
82c5da6b | 1562 | ttm_mem_io_free(bdev, &bo->mem); |
ba4e7d97 | 1563 | } |
e024e110 | 1564 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1565 | |
1566 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1567 | { | |
1568 | struct ttm_bo_device *bdev = bo->bdev; | |
1569 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1570 | struct rb_node *parent = NULL; | |
1571 | struct ttm_buffer_object *cur_bo; | |
1572 | unsigned long offset = bo->vm_node->start; | |
1573 | unsigned long cur_offset; | |
1574 | ||
1575 | while (*cur) { | |
1576 | parent = *cur; | |
1577 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1578 | cur_offset = cur_bo->vm_node->start; | |
1579 | if (offset < cur_offset) | |
1580 | cur = &parent->rb_left; | |
1581 | else if (offset > cur_offset) | |
1582 | cur = &parent->rb_right; | |
1583 | else | |
1584 | BUG(); | |
1585 | } | |
1586 | ||
1587 | rb_link_node(&bo->vm_rb, parent, cur); | |
1588 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1589 | } | |
1590 | ||
1591 | /** | |
1592 | * ttm_bo_setup_vm: | |
1593 | * | |
1594 | * @bo: the buffer to allocate address space for | |
1595 | * | |
1596 | * Allocate address space in the drm device so that applications | |
1597 | * can mmap the buffer and access the contents. This only | |
1598 | * applies to ttm_bo_type_device objects as others are not | |
1599 | * placed in the drm device address space. | |
1600 | */ | |
1601 | ||
1602 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1603 | { | |
1604 | struct ttm_bo_device *bdev = bo->bdev; | |
1605 | int ret; | |
1606 | ||
1607 | retry_pre_get: | |
1608 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1609 | if (unlikely(ret != 0)) | |
1610 | return ret; | |
1611 | ||
1612 | write_lock(&bdev->vm_lock); | |
1613 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1614 | bo->mem.num_pages, 0, 0); | |
1615 | ||
1616 | if (unlikely(bo->vm_node == NULL)) { | |
1617 | ret = -ENOMEM; | |
1618 | goto out_unlock; | |
1619 | } | |
1620 | ||
1621 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1622 | bo->mem.num_pages, 0); | |
1623 | ||
1624 | if (unlikely(bo->vm_node == NULL)) { | |
1625 | write_unlock(&bdev->vm_lock); | |
1626 | goto retry_pre_get; | |
1627 | } | |
1628 | ||
1629 | ttm_bo_vm_insert_rb(bo); | |
1630 | write_unlock(&bdev->vm_lock); | |
1631 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1632 | ||
1633 | return 0; | |
1634 | out_unlock: | |
1635 | write_unlock(&bdev->vm_lock); | |
1636 | return ret; | |
1637 | } | |
1638 | ||
1639 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1640 | bool lazy, bool interruptible, bool no_wait) | |
1641 | { | |
1642 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1643 | void *sync_obj; | |
1644 | void *sync_obj_arg; | |
1645 | int ret = 0; | |
1646 | ||
1647 | if (likely(bo->sync_obj == NULL)) | |
1648 | return 0; | |
1649 | ||
1650 | while (bo->sync_obj) { | |
1651 | ||
1652 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1653 | void *tmp_obj = bo->sync_obj; | |
1654 | bo->sync_obj = NULL; | |
1655 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1656 | spin_unlock(&bo->lock); | |
1657 | driver->sync_obj_unref(&tmp_obj); | |
1658 | spin_lock(&bo->lock); | |
1659 | continue; | |
1660 | } | |
1661 | ||
1662 | if (no_wait) | |
1663 | return -EBUSY; | |
1664 | ||
1665 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1666 | sync_obj_arg = bo->sync_obj_arg; | |
1667 | spin_unlock(&bo->lock); | |
1668 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1669 | lazy, interruptible); | |
1670 | if (unlikely(ret != 0)) { | |
1671 | driver->sync_obj_unref(&sync_obj); | |
1672 | spin_lock(&bo->lock); | |
1673 | return ret; | |
1674 | } | |
1675 | spin_lock(&bo->lock); | |
1676 | if (likely(bo->sync_obj == sync_obj && | |
1677 | bo->sync_obj_arg == sync_obj_arg)) { | |
1678 | void *tmp_obj = bo->sync_obj; | |
1679 | bo->sync_obj = NULL; | |
1680 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1681 | &bo->priv_flags); | |
1682 | spin_unlock(&bo->lock); | |
1683 | driver->sync_obj_unref(&sync_obj); | |
1684 | driver->sync_obj_unref(&tmp_obj); | |
1685 | spin_lock(&bo->lock); | |
fee280d3 TH |
1686 | } else { |
1687 | spin_unlock(&bo->lock); | |
1688 | driver->sync_obj_unref(&sync_obj); | |
1689 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1690 | } |
1691 | } | |
1692 | return 0; | |
1693 | } | |
1694 | EXPORT_SYMBOL(ttm_bo_wait); | |
1695 | ||
ba4e7d97 TH |
1696 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1697 | { | |
1698 | int ret = 0; | |
1699 | ||
1700 | /* | |
8cfe92d6 | 1701 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1702 | */ |
1703 | ||
1704 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1705 | if (unlikely(ret != 0)) | |
1706 | return ret; | |
1707 | spin_lock(&bo->lock); | |
1708 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1709 | spin_unlock(&bo->lock); | |
1710 | if (likely(ret == 0)) | |
1711 | atomic_inc(&bo->cpu_writers); | |
1712 | ttm_bo_unreserve(bo); | |
1713 | return ret; | |
1714 | } | |
d1ede145 | 1715 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1716 | |
1717 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1718 | { | |
1719 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1720 | wake_up_all(&bo->event_queue); | |
1721 | } | |
d1ede145 | 1722 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1723 | |
1724 | /** | |
1725 | * A buffer object shrink method that tries to swap out the first | |
1726 | * buffer object on the bo_global::swap_lru list. | |
1727 | */ | |
1728 | ||
1729 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1730 | { | |
a987fcaa TH |
1731 | struct ttm_bo_global *glob = |
1732 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1733 | struct ttm_buffer_object *bo; |
1734 | int ret = -EBUSY; | |
1735 | int put_count; | |
1736 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1737 | ||
a987fcaa | 1738 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1739 | while (ret == -EBUSY) { |
a987fcaa TH |
1740 | if (unlikely(list_empty(&glob->swap_lru))) { |
1741 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1742 | return -EBUSY; |
1743 | } | |
1744 | ||
a987fcaa | 1745 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1746 | struct ttm_buffer_object, swap); |
1747 | kref_get(&bo->list_kref); | |
1748 | ||
e1efc9b6 TH |
1749 | if (!list_empty(&bo->ddestroy)) { |
1750 | spin_unlock(&glob->lru_lock); | |
1751 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1752 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1753 | continue; | |
1754 | } | |
1755 | ||
ba4e7d97 TH |
1756 | /** |
1757 | * Reserve buffer. Since we unlock while sleeping, we need | |
1758 | * to re-check that nobody removed us from the swap-list while | |
1759 | * we slept. | |
1760 | */ | |
1761 | ||
1762 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1763 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1764 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1765 | ttm_bo_wait_unreserved(bo, false); |
1766 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1767 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1768 | } |
1769 | } | |
1770 | ||
1771 | BUG_ON(ret != 0); | |
1772 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1773 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1774 | |
1775 | while (put_count--) | |
1776 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
1777 | ||
1778 | /** | |
1779 | * Wait for GPU, then move to system cached. | |
1780 | */ | |
1781 | ||
1782 | spin_lock(&bo->lock); | |
1783 | ret = ttm_bo_wait(bo, false, false, false); | |
1784 | spin_unlock(&bo->lock); | |
1785 | ||
1786 | if (unlikely(ret != 0)) | |
1787 | goto out; | |
1788 | ||
1789 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1790 | struct ttm_mem_reg evict_mem; | |
1791 | ||
1792 | evict_mem = bo->mem; | |
1793 | evict_mem.mm_node = NULL; | |
1794 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1795 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1796 | ||
1797 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1798 | false, false, false); |
ba4e7d97 TH |
1799 | if (unlikely(ret != 0)) |
1800 | goto out; | |
1801 | } | |
1802 | ||
1803 | ttm_bo_unmap_virtual(bo); | |
1804 | ||
1805 | /** | |
1806 | * Swap out. Buffer will be swapped in again as soon as | |
1807 | * anyone tries to access a ttm page. | |
1808 | */ | |
1809 | ||
3f09ea4e TH |
1810 | if (bo->bdev->driver->swap_notify) |
1811 | bo->bdev->driver->swap_notify(bo); | |
1812 | ||
ba4e7d97 TH |
1813 | ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage); |
1814 | out: | |
1815 | ||
1816 | /** | |
1817 | * | |
1818 | * Unreserve without putting on LRU to avoid swapping out an | |
1819 | * already swapped buffer. | |
1820 | */ | |
1821 | ||
1822 | atomic_set(&bo->reserved, 0); | |
1823 | wake_up_all(&bo->event_queue); | |
1824 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1825 | return ret; | |
1826 | } | |
1827 | ||
1828 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1829 | { | |
a987fcaa | 1830 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1831 | ; |
1832 | } | |
e99e1e78 | 1833 | EXPORT_SYMBOL(ttm_bo_swapout_all); |