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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 | */ | |
ca262a99 JG |
30 | /* Notes: |
31 | * | |
32 | * We store bo pointer in drm_mm_node struct so we know which bo own a | |
33 | * specific node. There is no protection on the pointer, thus to make | |
34 | * sure things don't go berserk you have to access this pointer while | |
35 | * holding the global lru lock and make sure anytime you free a node you | |
36 | * reset the pointer to NULL. | |
37 | */ | |
ba4e7d97 TH |
38 | |
39 | #include "ttm/ttm_module.h" | |
40 | #include "ttm/ttm_bo_driver.h" | |
41 | #include "ttm/ttm_placement.h" | |
42 | #include <linux/jiffies.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/mm.h> | |
46 | #include <linux/file.h> | |
47 | #include <linux/module.h> | |
48 | ||
49 | #define TTM_ASSERT_LOCKED(param) | |
50 | #define TTM_DEBUG(fmt, arg...) | |
51 | #define TTM_BO_HASH_ORDER 13 | |
52 | ||
53 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 | 54 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
a987fcaa TH |
55 | static void ttm_bo_global_kobj_release(struct kobject *kobj); |
56 | ||
57 | static struct attribute ttm_bo_count = { | |
58 | .name = "bo_count", | |
59 | .mode = S_IRUGO | |
60 | }; | |
61 | ||
fb53f862 JG |
62 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
63 | { | |
64 | int i; | |
65 | ||
66 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
67 | if (flags & (1 << i)) { | |
68 | *mem_type = i; | |
69 | return 0; | |
70 | } | |
71 | return -EINVAL; | |
72 | } | |
73 | ||
5012f506 | 74 | static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
fb53f862 | 75 | { |
5012f506 JG |
76 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
77 | ||
fb53f862 JG |
78 | printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type); |
79 | printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type); | |
80 | printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags); | |
81 | printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset); | |
eb6d2c39 | 82 | printk(KERN_ERR TTM_PFX " size: %llu\n", man->size); |
fb53f862 JG |
83 | printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n", |
84 | man->available_caching); | |
85 | printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n", | |
86 | man->default_caching); | |
d961db75 BS |
87 | if (mem_type != TTM_PL_SYSTEM) |
88 | (*man->func->debug)(man, TTM_PFX); | |
fb53f862 JG |
89 | } |
90 | ||
91 | static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, | |
92 | struct ttm_placement *placement) | |
93 | { | |
fb53f862 JG |
94 | int i, ret, mem_type; |
95 | ||
eb6d2c39 | 96 | printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n", |
fb53f862 JG |
97 | bo, bo->mem.num_pages, bo->mem.size >> 10, |
98 | bo->mem.size >> 20); | |
99 | for (i = 0; i < placement->num_placement; i++) { | |
100 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
101 | &mem_type); | |
102 | if (ret) | |
103 | return; | |
fb53f862 JG |
104 | printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n", |
105 | i, placement->placement[i], mem_type); | |
5012f506 | 106 | ttm_mem_type_debug(bo->bdev, mem_type); |
fb53f862 JG |
107 | } |
108 | } | |
109 | ||
a987fcaa TH |
110 | static ssize_t ttm_bo_global_show(struct kobject *kobj, |
111 | struct attribute *attr, | |
112 | char *buffer) | |
113 | { | |
114 | struct ttm_bo_global *glob = | |
115 | container_of(kobj, struct ttm_bo_global, kobj); | |
116 | ||
117 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
118 | (unsigned long) atomic_read(&glob->bo_count)); | |
119 | } | |
120 | ||
121 | static struct attribute *ttm_bo_global_attrs[] = { | |
122 | &ttm_bo_count, | |
123 | NULL | |
124 | }; | |
125 | ||
52cf25d0 | 126 | static const struct sysfs_ops ttm_bo_global_ops = { |
a987fcaa TH |
127 | .show = &ttm_bo_global_show |
128 | }; | |
129 | ||
130 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
131 | .release = &ttm_bo_global_kobj_release, | |
132 | .sysfs_ops = &ttm_bo_global_ops, | |
133 | .default_attrs = ttm_bo_global_attrs | |
134 | }; | |
135 | ||
ba4e7d97 TH |
136 | |
137 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
138 | { | |
139 | return 1 << (type); | |
140 | } | |
141 | ||
142 | static void ttm_bo_release_list(struct kref *list_kref) | |
143 | { | |
144 | struct ttm_buffer_object *bo = | |
145 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
146 | struct ttm_bo_device *bdev = bo->bdev; | |
147 | ||
148 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
149 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
150 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
151 | BUG_ON(bo->sync_obj != NULL); | |
152 | BUG_ON(bo->mem.mm_node != NULL); | |
153 | BUG_ON(!list_empty(&bo->lru)); | |
154 | BUG_ON(!list_empty(&bo->ddestroy)); | |
155 | ||
156 | if (bo->ttm) | |
157 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 158 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
159 | if (bo->destroy) |
160 | bo->destroy(bo); | |
161 | else { | |
a987fcaa | 162 | ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size); |
ba4e7d97 TH |
163 | kfree(bo); |
164 | } | |
165 | } | |
166 | ||
167 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
168 | { | |
ba4e7d97 | 169 | if (interruptible) { |
965d3807 | 170 | return wait_event_interruptible(bo->event_queue, |
ba4e7d97 | 171 | atomic_read(&bo->reserved) == 0); |
ba4e7d97 TH |
172 | } else { |
173 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
965d3807 | 174 | return 0; |
ba4e7d97 | 175 | } |
ba4e7d97 | 176 | } |
d1ede145 | 177 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 TH |
178 | |
179 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
180 | { | |
181 | struct ttm_bo_device *bdev = bo->bdev; | |
182 | struct ttm_mem_type_manager *man; | |
183 | ||
184 | BUG_ON(!atomic_read(&bo->reserved)); | |
185 | ||
186 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
187 | ||
188 | BUG_ON(!list_empty(&bo->lru)); | |
189 | ||
190 | man = &bdev->man[bo->mem.mem_type]; | |
191 | list_add_tail(&bo->lru, &man->lru); | |
192 | kref_get(&bo->list_kref); | |
193 | ||
194 | if (bo->ttm != NULL) { | |
a987fcaa | 195 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
196 | kref_get(&bo->list_kref); |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | /** | |
202 | * Call with the lru_lock held. | |
203 | */ | |
204 | ||
205 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
206 | { | |
207 | int put_count = 0; | |
208 | ||
209 | if (!list_empty(&bo->swap)) { | |
210 | list_del_init(&bo->swap); | |
211 | ++put_count; | |
212 | } | |
213 | if (!list_empty(&bo->lru)) { | |
214 | list_del_init(&bo->lru); | |
215 | ++put_count; | |
216 | } | |
217 | ||
218 | /* | |
219 | * TODO: Add a driver hook to delete from | |
220 | * driver-specific LRU's here. | |
221 | */ | |
222 | ||
223 | return put_count; | |
224 | } | |
225 | ||
226 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
227 | bool interruptible, | |
228 | bool no_wait, bool use_sequence, uint32_t sequence) | |
229 | { | |
a987fcaa | 230 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
231 | int ret; |
232 | ||
233 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
234 | if (use_sequence && bo->seq_valid && | |
235 | (sequence - bo->val_seq < (1 << 31))) { | |
236 | return -EAGAIN; | |
237 | } | |
238 | ||
239 | if (no_wait) | |
240 | return -EBUSY; | |
241 | ||
a987fcaa | 242 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 243 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 244 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
245 | |
246 | if (unlikely(ret)) | |
247 | return ret; | |
248 | } | |
249 | ||
250 | if (use_sequence) { | |
251 | bo->val_seq = sequence; | |
252 | bo->seq_valid = true; | |
253 | } else { | |
254 | bo->seq_valid = false; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | EXPORT_SYMBOL(ttm_bo_reserve); | |
260 | ||
261 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
262 | { | |
263 | BUG(); | |
264 | } | |
265 | ||
266 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
267 | bool interruptible, | |
268 | bool no_wait, bool use_sequence, uint32_t sequence) | |
269 | { | |
a987fcaa | 270 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
271 | int put_count = 0; |
272 | int ret; | |
273 | ||
a987fcaa | 274 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
275 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
276 | sequence); | |
277 | if (likely(ret == 0)) | |
278 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 279 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
280 | |
281 | while (put_count--) | |
282 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
283 | ||
284 | return ret; | |
285 | } | |
286 | ||
287 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
288 | { | |
a987fcaa | 289 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 290 | |
a987fcaa | 291 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
292 | ttm_bo_add_to_lru(bo); |
293 | atomic_set(&bo->reserved, 0); | |
294 | wake_up_all(&bo->event_queue); | |
a987fcaa | 295 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
296 | } |
297 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
298 | ||
299 | /* | |
300 | * Call bo->mutex locked. | |
301 | */ | |
ba4e7d97 TH |
302 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
303 | { | |
304 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 305 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
306 | int ret = 0; |
307 | uint32_t page_flags = 0; | |
308 | ||
309 | TTM_ASSERT_LOCKED(&bo->mutex); | |
310 | bo->ttm = NULL; | |
311 | ||
ad49f501 DA |
312 | if (bdev->need_dma32) |
313 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
314 | ||
ba4e7d97 TH |
315 | switch (bo->type) { |
316 | case ttm_bo_type_device: | |
317 | if (zero_alloc) | |
318 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
319 | case ttm_bo_type_kernel: | |
320 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 321 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
322 | if (unlikely(bo->ttm == NULL)) |
323 | ret = -ENOMEM; | |
324 | break; | |
325 | case ttm_bo_type_user: | |
326 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
327 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 328 | glob->dummy_read_page); |
447aeb90 | 329 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 330 | ret = -ENOMEM; |
447aeb90 DA |
331 | break; |
332 | } | |
ba4e7d97 TH |
333 | |
334 | ret = ttm_tt_set_user(bo->ttm, current, | |
335 | bo->buffer_start, bo->num_pages); | |
336 | if (unlikely(ret != 0)) | |
337 | ttm_tt_destroy(bo->ttm); | |
338 | break; | |
339 | default: | |
340 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
341 | ret = -EINVAL; | |
342 | break; | |
343 | } | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
348 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
349 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
350 | bool evict, bool interruptible, |
351 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
352 | { |
353 | struct ttm_bo_device *bdev = bo->bdev; | |
354 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
355 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
356 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
357 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
358 | int ret = 0; | |
359 | ||
360 | if (old_is_pci || new_is_pci || | |
361 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
362 | ttm_bo_unmap_virtual(bo); | |
363 | ||
364 | /* | |
365 | * Create and bind a ttm if required. | |
366 | */ | |
367 | ||
368 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
369 | ret = ttm_bo_add_ttm(bo, false); | |
370 | if (ret) | |
371 | goto out_err; | |
372 | ||
373 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
374 | if (ret) | |
87ef9209 | 375 | goto out_err; |
ba4e7d97 TH |
376 | |
377 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
378 | ret = ttm_tt_bind(bo->ttm, mem); | |
379 | if (ret) | |
380 | goto out_err; | |
381 | } | |
382 | ||
383 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 384 | bo->mem = *mem; |
ba4e7d97 | 385 | mem->mm_node = NULL; |
ba4e7d97 TH |
386 | goto moved; |
387 | } | |
388 | ||
389 | } | |
390 | ||
e024e110 DA |
391 | if (bdev->driver->move_notify) |
392 | bdev->driver->move_notify(bo, mem); | |
393 | ||
ba4e7d97 TH |
394 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
395 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 396 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
397 | else if (bdev->driver->move) |
398 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 399 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 400 | else |
9d87fa21 | 401 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
402 | |
403 | if (ret) | |
404 | goto out_err; | |
405 | ||
406 | moved: | |
407 | if (bo->evicted) { | |
408 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
409 | if (ret) | |
410 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
411 | bo->evicted = false; | |
412 | } | |
413 | ||
414 | if (bo->mem.mm_node) { | |
415 | spin_lock(&bo->lock); | |
d961db75 | 416 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
417 | bdev->man[bo->mem.mem_type].gpu_offset; |
418 | bo->cur_placement = bo->mem.placement; | |
419 | spin_unlock(&bo->lock); | |
354fb52c TH |
420 | } else |
421 | bo->offset = 0; | |
ba4e7d97 TH |
422 | |
423 | return 0; | |
424 | ||
425 | out_err: | |
426 | new_man = &bdev->man[bo->mem.mem_type]; | |
427 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
428 | ttm_tt_unbind(bo->ttm); | |
429 | ttm_tt_destroy(bo->ttm); | |
430 | bo->ttm = NULL; | |
431 | } | |
432 | ||
433 | return ret; | |
434 | } | |
435 | ||
1df6a2eb | 436 | /** |
40d857bb | 437 | * Call bo::reserved. |
1df6a2eb | 438 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
439 | * This is the place to put in driver specific hooks to release |
440 | * driver private resources. | |
441 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
442 | */ |
443 | ||
444 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
445 | { | |
1df6a2eb | 446 | if (bo->ttm) { |
1df6a2eb TH |
447 | ttm_tt_unbind(bo->ttm); |
448 | ttm_tt_destroy(bo->ttm); | |
449 | bo->ttm = NULL; | |
1df6a2eb TH |
450 | } |
451 | ||
40d857bb | 452 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
453 | |
454 | atomic_set(&bo->reserved, 0); | |
455 | wake_up_all(&bo->event_queue); | |
1df6a2eb TH |
456 | } |
457 | ||
e1efc9b6 | 458 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
459 | { |
460 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 461 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 TH |
462 | struct ttm_bo_driver *driver; |
463 | void *sync_obj; | |
464 | void *sync_obj_arg; | |
465 | int put_count; | |
ba4e7d97 TH |
466 | int ret; |
467 | ||
468 | spin_lock(&bo->lock); | |
e1efc9b6 | 469 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 470 | if (!bo->sync_obj) { |
ba4e7d97 | 471 | |
a987fcaa | 472 | spin_lock(&glob->lru_lock); |
aaa20736 | 473 | |
1df6a2eb | 474 | /** |
e1efc9b6 TH |
475 | * Lock inversion between bo::reserve and bo::lock here, |
476 | * but that's OK, since we're only trylocking. | |
1df6a2eb TH |
477 | */ |
478 | ||
e1efc9b6 | 479 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 480 | |
e1efc9b6 TH |
481 | if (unlikely(ret == -EBUSY)) |
482 | goto queue; | |
1df6a2eb | 483 | |
e1efc9b6 | 484 | spin_unlock(&bo->lock); |
1df6a2eb | 485 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 486 | |
40d857bb | 487 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 488 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 TH |
489 | |
490 | while (put_count--) | |
aaa20736 | 491 | kref_put(&bo->list_kref, ttm_bo_ref_bug); |
ba4e7d97 | 492 | |
e1efc9b6 TH |
493 | return; |
494 | } else { | |
495 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 496 | } |
e1efc9b6 TH |
497 | queue: |
498 | sync_obj = bo->sync_obj; | |
499 | sync_obj_arg = bo->sync_obj_arg; | |
500 | driver = bdev->driver; | |
501 | ||
502 | kref_get(&bo->list_kref); | |
503 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
504 | spin_unlock(&glob->lru_lock); | |
505 | spin_unlock(&bo->lock); | |
506 | ||
507 | if (sync_obj) | |
508 | driver->sync_obj_flush(sync_obj, sync_obj_arg); | |
509 | schedule_delayed_work(&bdev->wq, | |
510 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
511 | } | |
512 | ||
513 | /** | |
514 | * function ttm_bo_cleanup_refs | |
515 | * If bo idle, remove from delayed- and lru lists, and unref. | |
516 | * If not idle, do nothing. | |
517 | * | |
518 | * @interruptible Any sleeps should occur interruptibly. | |
519 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
520 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
521 | */ | |
522 | ||
523 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
524 | bool interruptible, | |
525 | bool no_wait_reserve, | |
526 | bool no_wait_gpu) | |
527 | { | |
528 | struct ttm_bo_global *glob = bo->glob; | |
529 | int put_count; | |
530 | int ret = 0; | |
531 | ||
532 | retry: | |
533 | spin_lock(&bo->lock); | |
534 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); | |
535 | spin_unlock(&bo->lock); | |
536 | ||
537 | if (unlikely(ret != 0)) | |
538 | return ret; | |
539 | ||
a987fcaa | 540 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
541 | ret = ttm_bo_reserve_locked(bo, interruptible, |
542 | no_wait_reserve, false, 0); | |
ba4e7d97 | 543 | |
e1efc9b6 | 544 | if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) { |
a987fcaa | 545 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
546 | return ret; |
547 | } | |
ba4e7d97 | 548 | |
e1efc9b6 TH |
549 | /** |
550 | * We can re-check for sync object without taking | |
551 | * the bo::lock since setting the sync object requires | |
552 | * also bo::reserved. A busy object at this point may | |
553 | * be caused by another thread recently starting an accelerated | |
554 | * eviction. | |
555 | */ | |
ba4e7d97 | 556 | |
e1efc9b6 TH |
557 | if (unlikely(bo->sync_obj)) { |
558 | atomic_set(&bo->reserved, 0); | |
559 | wake_up_all(&bo->event_queue); | |
a987fcaa | 560 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 561 | goto retry; |
ba4e7d97 TH |
562 | } |
563 | ||
e1efc9b6 TH |
564 | put_count = ttm_bo_del_from_lru(bo); |
565 | list_del_init(&bo->ddestroy); | |
566 | ++put_count; | |
567 | ||
568 | spin_unlock(&glob->lru_lock); | |
569 | ttm_bo_cleanup_memtype_use(bo); | |
570 | ||
571 | while (put_count--) | |
572 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
573 | ||
574 | return 0; | |
ba4e7d97 TH |
575 | } |
576 | ||
577 | /** | |
578 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
579 | * encountered buffers. | |
580 | */ | |
581 | ||
582 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
583 | { | |
a987fcaa | 584 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
585 | struct ttm_buffer_object *entry = NULL; |
586 | int ret = 0; | |
ba4e7d97 | 587 | |
a987fcaa | 588 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
589 | if (list_empty(&bdev->ddestroy)) |
590 | goto out_unlock; | |
591 | ||
592 | entry = list_first_entry(&bdev->ddestroy, | |
593 | struct ttm_buffer_object, ddestroy); | |
594 | kref_get(&entry->list_kref); | |
595 | ||
596 | for (;;) { | |
597 | struct ttm_buffer_object *nentry = NULL; | |
598 | ||
599 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
600 | nentry = list_first_entry(&entry->ddestroy, | |
601 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
602 | kref_get(&nentry->list_kref); |
603 | } | |
ba4e7d97 | 604 | |
a987fcaa | 605 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
606 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
607 | !remove_all); | |
ba4e7d97 | 608 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
609 | entry = nentry; |
610 | ||
611 | if (ret || !entry) | |
612 | goto out; | |
ba4e7d97 | 613 | |
a987fcaa | 614 | spin_lock(&glob->lru_lock); |
1a961ce0 | 615 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
616 | break; |
617 | } | |
ba4e7d97 | 618 | |
1a961ce0 LB |
619 | out_unlock: |
620 | spin_unlock(&glob->lru_lock); | |
621 | out: | |
622 | if (entry) | |
623 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
624 | return ret; |
625 | } | |
626 | ||
627 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
628 | { | |
629 | struct ttm_bo_device *bdev = | |
630 | container_of(work, struct ttm_bo_device, wq.work); | |
631 | ||
632 | if (ttm_bo_delayed_delete(bdev, false)) { | |
633 | schedule_delayed_work(&bdev->wq, | |
634 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
635 | } | |
636 | } | |
637 | ||
638 | static void ttm_bo_release(struct kref *kref) | |
639 | { | |
640 | struct ttm_buffer_object *bo = | |
641 | container_of(kref, struct ttm_buffer_object, kref); | |
642 | struct ttm_bo_device *bdev = bo->bdev; | |
643 | ||
644 | if (likely(bo->vm_node != NULL)) { | |
645 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
646 | drm_mm_put_block(bo->vm_node); | |
647 | bo->vm_node = NULL; | |
648 | } | |
649 | write_unlock(&bdev->vm_lock); | |
e1efc9b6 | 650 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
651 | kref_put(&bo->list_kref, ttm_bo_release_list); |
652 | write_lock(&bdev->vm_lock); | |
653 | } | |
654 | ||
655 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
656 | { | |
657 | struct ttm_buffer_object *bo = *p_bo; | |
658 | struct ttm_bo_device *bdev = bo->bdev; | |
659 | ||
660 | *p_bo = NULL; | |
661 | write_lock(&bdev->vm_lock); | |
662 | kref_put(&bo->kref, ttm_bo_release); | |
663 | write_unlock(&bdev->vm_lock); | |
664 | } | |
665 | EXPORT_SYMBOL(ttm_bo_unref); | |
666 | ||
7c5ee536 MG |
667 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
668 | { | |
669 | return cancel_delayed_work_sync(&bdev->wq); | |
670 | } | |
671 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
672 | ||
673 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
674 | { | |
675 | if (resched) | |
676 | schedule_delayed_work(&bdev->wq, | |
677 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
678 | } | |
679 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
680 | ||
ca262a99 | 681 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 682 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 683 | { |
ba4e7d97 TH |
684 | struct ttm_bo_device *bdev = bo->bdev; |
685 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
686 | struct ttm_placement placement; |
687 | int ret = 0; | |
ba4e7d97 TH |
688 | |
689 | spin_lock(&bo->lock); | |
9d87fa21 | 690 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 TH |
691 | spin_unlock(&bo->lock); |
692 | ||
78ecf091 | 693 | if (unlikely(ret != 0)) { |
98ffc415 | 694 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
695 | printk(KERN_ERR TTM_PFX |
696 | "Failed to expire sync object before " | |
697 | "buffer eviction.\n"); | |
698 | } | |
ba4e7d97 TH |
699 | goto out; |
700 | } | |
701 | ||
702 | BUG_ON(!atomic_read(&bo->reserved)); | |
703 | ||
704 | evict_mem = bo->mem; | |
705 | evict_mem.mm_node = NULL; | |
82c5da6b | 706 | evict_mem.bus.io_reserved = false; |
ba4e7d97 | 707 | |
7cb7d1d7 JG |
708 | placement.fpfn = 0; |
709 | placement.lpfn = 0; | |
710 | placement.num_placement = 0; | |
711 | placement.num_busy_placement = 0; | |
ca262a99 JG |
712 | bdev->driver->evict_flags(bo, &placement); |
713 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 714 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 715 | if (ret) { |
fb53f862 | 716 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
717 | printk(KERN_ERR TTM_PFX |
718 | "Failed to find memory space for " | |
719 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
720 | ttm_bo_mem_space_debug(bo, &placement); |
721 | } | |
ba4e7d97 TH |
722 | goto out; |
723 | } | |
724 | ||
725 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 726 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 727 | if (ret) { |
98ffc415 | 728 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 729 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 730 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
731 | goto out; |
732 | } | |
ca262a99 JG |
733 | bo->evicted = true; |
734 | out: | |
735 | return ret; | |
736 | } | |
737 | ||
738 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
739 | uint32_t mem_type, | |
9d87fa21 JG |
740 | bool interruptible, bool no_wait_reserve, |
741 | bool no_wait_gpu) | |
ca262a99 JG |
742 | { |
743 | struct ttm_bo_global *glob = bdev->glob; | |
744 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
745 | struct ttm_buffer_object *bo; | |
746 | int ret, put_count = 0; | |
ba4e7d97 | 747 | |
9c51ba1d | 748 | retry: |
a987fcaa | 749 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
750 | if (list_empty(&man->lru)) { |
751 | spin_unlock(&glob->lru_lock); | |
752 | return -EBUSY; | |
753 | } | |
754 | ||
ca262a99 JG |
755 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
756 | kref_get(&bo->list_kref); | |
9c51ba1d | 757 | |
e1efc9b6 TH |
758 | if (!list_empty(&bo->ddestroy)) { |
759 | spin_unlock(&glob->lru_lock); | |
760 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
761 | no_wait_reserve, no_wait_gpu); | |
762 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
763 | ||
764 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
765 | return ret; | |
766 | ||
767 | goto retry; | |
768 | } | |
769 | ||
9d87fa21 | 770 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
771 | |
772 | if (unlikely(ret == -EBUSY)) { | |
773 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 774 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
775 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
776 | ||
777 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
778 | ||
779 | /** | |
780 | * We *need* to retry after releasing the lru lock. | |
781 | */ | |
782 | ||
783 | if (unlikely(ret != 0)) | |
784 | return ret; | |
785 | goto retry; | |
786 | } | |
787 | ||
788 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 789 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
790 | |
791 | BUG_ON(ret != 0); | |
792 | ||
ca262a99 JG |
793 | while (put_count--) |
794 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
9c51ba1d | 795 | |
9d87fa21 | 796 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 797 | ttm_bo_unreserve(bo); |
9c51ba1d | 798 | |
ca262a99 | 799 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
800 | return ret; |
801 | } | |
802 | ||
42311ff9 BS |
803 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
804 | { | |
d961db75 | 805 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 806 | |
d961db75 BS |
807 | if (mem->mm_node) |
808 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
809 | } |
810 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
811 | ||
ba4e7d97 TH |
812 | /** |
813 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
814 | * space, or we've evicted everything and there isn't enough space. | |
815 | */ | |
ca262a99 JG |
816 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
817 | uint32_t mem_type, | |
818 | struct ttm_placement *placement, | |
819 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
820 | bool interruptible, |
821 | bool no_wait_reserve, | |
822 | bool no_wait_gpu) | |
ba4e7d97 | 823 | { |
ca262a99 | 824 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 825 | struct ttm_bo_global *glob = bdev->glob; |
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 JG |
835 | spin_lock(&glob->lru_lock); |
836 | if (list_empty(&man->lru)) { | |
837 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 | 838 | break; |
ca262a99 | 839 | } |
a987fcaa | 840 | spin_unlock(&glob->lru_lock); |
ca262a99 | 841 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 842 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
843 | if (unlikely(ret != 0)) |
844 | return ret; | |
ba4e7d97 | 845 | } while (1); |
d961db75 | 846 | if (mem->mm_node == NULL) |
ba4e7d97 | 847 | return -ENOMEM; |
ba4e7d97 TH |
848 | mem->mem_type = mem_type; |
849 | return 0; | |
850 | } | |
851 | ||
ae3e8122 TH |
852 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
853 | uint32_t cur_placement, | |
854 | uint32_t proposed_placement) | |
855 | { | |
856 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
857 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
858 | ||
859 | /** | |
860 | * Keep current caching if possible. | |
861 | */ | |
862 | ||
863 | if ((cur_placement & caching) != 0) | |
864 | result |= (cur_placement & caching); | |
865 | else if ((man->default_caching & caching) != 0) | |
866 | result |= man->default_caching; | |
867 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
868 | result |= TTM_PL_FLAG_CACHED; | |
869 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
870 | result |= TTM_PL_FLAG_WC; | |
871 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
872 | result |= TTM_PL_FLAG_UNCACHED; | |
873 | ||
874 | return result; | |
875 | } | |
876 | ||
ba4e7d97 TH |
877 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
878 | bool disallow_fixed, | |
879 | uint32_t mem_type, | |
ae3e8122 TH |
880 | uint32_t proposed_placement, |
881 | uint32_t *masked_placement) | |
ba4e7d97 TH |
882 | { |
883 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
884 | ||
885 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
886 | return false; | |
887 | ||
ae3e8122 | 888 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
889 | return false; |
890 | ||
ae3e8122 | 891 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 892 | return false; |
ba4e7d97 | 893 | |
ae3e8122 TH |
894 | cur_flags |= (proposed_placement & man->available_caching); |
895 | ||
896 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
897 | return true; |
898 | } | |
899 | ||
900 | /** | |
901 | * Creates space for memory region @mem according to its type. | |
902 | * | |
903 | * This function first searches for free space in compatible memory types in | |
904 | * the priority order defined by the driver. If free space isn't found, then | |
905 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
906 | * space. | |
907 | */ | |
908 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
909 | struct ttm_placement *placement, |
910 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
911 | bool interruptible, bool no_wait_reserve, |
912 | bool no_wait_gpu) | |
ba4e7d97 TH |
913 | { |
914 | struct ttm_bo_device *bdev = bo->bdev; | |
915 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
916 | uint32_t mem_type = TTM_PL_SYSTEM; |
917 | uint32_t cur_flags = 0; | |
918 | bool type_found = false; | |
919 | bool type_ok = false; | |
98ffc415 | 920 | bool has_erestartsys = false; |
ca262a99 | 921 | int i, ret; |
ba4e7d97 TH |
922 | |
923 | mem->mm_node = NULL; | |
b6637526 | 924 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
925 | ret = ttm_mem_type_from_flags(placement->placement[i], |
926 | &mem_type); | |
927 | if (ret) | |
928 | return ret; | |
ba4e7d97 TH |
929 | man = &bdev->man[mem_type]; |
930 | ||
931 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
932 | bo->type == ttm_bo_type_user, |
933 | mem_type, | |
934 | placement->placement[i], | |
935 | &cur_flags); | |
ba4e7d97 TH |
936 | |
937 | if (!type_ok) | |
938 | continue; | |
939 | ||
ae3e8122 TH |
940 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
941 | cur_flags); | |
ca262a99 JG |
942 | /* |
943 | * Use the access and other non-mapping-related flag bits from | |
944 | * the memory placement flags to the current flags | |
945 | */ | |
946 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
947 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 948 | |
ba4e7d97 TH |
949 | if (mem_type == TTM_PL_SYSTEM) |
950 | break; | |
951 | ||
952 | if (man->has_type && man->use_type) { | |
953 | type_found = true; | |
d961db75 | 954 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
955 | if (unlikely(ret)) |
956 | return ret; | |
ba4e7d97 | 957 | } |
d961db75 | 958 | if (mem->mm_node) |
ba4e7d97 TH |
959 | break; |
960 | } | |
961 | ||
d961db75 | 962 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
963 | mem->mem_type = mem_type; |
964 | mem->placement = cur_flags; | |
965 | return 0; | |
966 | } | |
967 | ||
968 | if (!type_found) | |
969 | return -EINVAL; | |
970 | ||
b6637526 DA |
971 | for (i = 0; i < placement->num_busy_placement; ++i) { |
972 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
973 | &mem_type); |
974 | if (ret) | |
975 | return ret; | |
ba4e7d97 | 976 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
977 | if (!man->has_type) |
978 | continue; | |
ba4e7d97 | 979 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
980 | bo->type == ttm_bo_type_user, |
981 | mem_type, | |
b6637526 | 982 | placement->busy_placement[i], |
ca262a99 | 983 | &cur_flags)) |
ba4e7d97 TH |
984 | continue; |
985 | ||
ae3e8122 TH |
986 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
987 | cur_flags); | |
ca262a99 JG |
988 | /* |
989 | * Use the access and other non-mapping-related flag bits from | |
990 | * the memory placement flags to the current flags | |
991 | */ | |
b6637526 | 992 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 993 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 994 | |
0eaddb28 TH |
995 | |
996 | if (mem_type == TTM_PL_SYSTEM) { | |
997 | mem->mem_type = mem_type; | |
998 | mem->placement = cur_flags; | |
999 | mem->mm_node = NULL; | |
1000 | return 0; | |
1001 | } | |
1002 | ||
ca262a99 | 1003 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1004 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1005 | if (ret == 0 && mem->mm_node) { |
1006 | mem->placement = cur_flags; | |
1007 | return 0; | |
1008 | } | |
98ffc415 TH |
1009 | if (ret == -ERESTARTSYS) |
1010 | has_erestartsys = true; | |
ba4e7d97 | 1011 | } |
98ffc415 | 1012 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1013 | return ret; |
1014 | } | |
1015 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1016 | ||
1017 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1018 | { | |
ba4e7d97 TH |
1019 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1020 | return -EBUSY; | |
1021 | ||
98ffc415 TH |
1022 | return wait_event_interruptible(bo->event_queue, |
1023 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1024 | } |
d1ede145 | 1025 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1026 | |
1027 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1028 | struct ttm_placement *placement, |
9d87fa21 JG |
1029 | bool interruptible, bool no_wait_reserve, |
1030 | bool no_wait_gpu) | |
ba4e7d97 | 1031 | { |
ba4e7d97 TH |
1032 | int ret = 0; |
1033 | struct ttm_mem_reg mem; | |
1034 | ||
1035 | BUG_ON(!atomic_read(&bo->reserved)); | |
1036 | ||
1037 | /* | |
1038 | * FIXME: It's possible to pipeline buffer moves. | |
1039 | * Have the driver move function wait for idle when necessary, | |
1040 | * instead of doing it here. | |
1041 | */ | |
ba4e7d97 | 1042 | spin_lock(&bo->lock); |
9d87fa21 | 1043 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 | 1044 | spin_unlock(&bo->lock); |
ba4e7d97 TH |
1045 | if (ret) |
1046 | return ret; | |
ba4e7d97 TH |
1047 | mem.num_pages = bo->num_pages; |
1048 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1049 | mem.page_alignment = bo->mem.page_alignment; | |
82c5da6b | 1050 | mem.bus.io_reserved = false; |
ba4e7d97 TH |
1051 | /* |
1052 | * Determine where to move the buffer. | |
1053 | */ | |
9d87fa21 | 1054 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1055 | if (ret) |
1056 | goto out_unlock; | |
9d87fa21 | 1057 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1058 | out_unlock: |
d961db75 BS |
1059 | if (ret && mem.mm_node) |
1060 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1061 | return ret; |
1062 | } | |
1063 | ||
ca262a99 | 1064 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1065 | struct ttm_mem_reg *mem) |
1066 | { | |
ca262a99 | 1067 | int i; |
e22238ea | 1068 | |
d961db75 BS |
1069 | if (mem->mm_node && placement->lpfn != 0 && |
1070 | (mem->start < placement->fpfn || | |
1071 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1072 | return -1; |
ca262a99 JG |
1073 | |
1074 | for (i = 0; i < placement->num_placement; i++) { | |
1075 | if ((placement->placement[i] & mem->placement & | |
1076 | TTM_PL_MASK_CACHING) && | |
1077 | (placement->placement[i] & mem->placement & | |
1078 | TTM_PL_MASK_MEM)) | |
1079 | return i; | |
1080 | } | |
1081 | return -1; | |
ba4e7d97 TH |
1082 | } |
1083 | ||
09855acb JG |
1084 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1085 | struct ttm_placement *placement, | |
9d87fa21 JG |
1086 | bool interruptible, bool no_wait_reserve, |
1087 | bool no_wait_gpu) | |
ba4e7d97 TH |
1088 | { |
1089 | int ret; | |
1090 | ||
1091 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1092 | /* Check that range is valid */ |
1093 | if (placement->lpfn || placement->fpfn) | |
1094 | if (placement->fpfn > placement->lpfn || | |
1095 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1096 | return -EINVAL; | |
ba4e7d97 TH |
1097 | /* |
1098 | * Check whether we need to move buffer. | |
1099 | */ | |
ca262a99 JG |
1100 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1101 | if (ret < 0) { | |
9d87fa21 | 1102 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1103 | if (ret) |
ba4e7d97 | 1104 | return ret; |
ca262a99 JG |
1105 | } else { |
1106 | /* | |
1107 | * Use the access and other non-mapping-related flag bits from | |
1108 | * the compatible memory placement flags to the active flags | |
1109 | */ | |
1110 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1111 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1112 | } |
ba4e7d97 TH |
1113 | /* |
1114 | * We might need to add a TTM. | |
1115 | */ | |
ba4e7d97 TH |
1116 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1117 | ret = ttm_bo_add_ttm(bo, true); | |
1118 | if (ret) | |
1119 | return ret; | |
1120 | } | |
ba4e7d97 TH |
1121 | return 0; |
1122 | } | |
09855acb | 1123 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1124 | |
09855acb JG |
1125 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1126 | struct ttm_placement *placement) | |
ba4e7d97 | 1127 | { |
09855acb | 1128 | int i; |
ba4e7d97 | 1129 | |
09855acb JG |
1130 | if (placement->fpfn || placement->lpfn) { |
1131 | if (bo->mem.num_pages > (placement->lpfn - placement->fpfn)) { | |
1132 | printk(KERN_ERR TTM_PFX "Page number range to small " | |
1133 | "Need %lu pages, range is [%u, %u]\n", | |
1134 | bo->mem.num_pages, placement->fpfn, | |
1135 | placement->lpfn); | |
ba4e7d97 TH |
1136 | return -EINVAL; |
1137 | } | |
09855acb JG |
1138 | } |
1139 | for (i = 0; i < placement->num_placement; i++) { | |
1140 | if (!capable(CAP_SYS_ADMIN)) { | |
1141 | if (placement->placement[i] & TTM_PL_FLAG_NO_EVICT) { | |
1142 | printk(KERN_ERR TTM_PFX "Need to be root to " | |
1143 | "modify NO_EVICT status.\n"); | |
1144 | return -EINVAL; | |
1145 | } | |
1146 | } | |
1147 | } | |
1148 | for (i = 0; i < placement->num_busy_placement; i++) { | |
1149 | if (!capable(CAP_SYS_ADMIN)) { | |
1150 | if (placement->busy_placement[i] & TTM_PL_FLAG_NO_EVICT) { | |
1151 | printk(KERN_ERR TTM_PFX "Need to be root to " | |
1152 | "modify NO_EVICT status.\n"); | |
1153 | return -EINVAL; | |
1154 | } | |
ba4e7d97 TH |
1155 | } |
1156 | } | |
1157 | return 0; | |
1158 | } | |
1159 | ||
09855acb JG |
1160 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1161 | struct ttm_buffer_object *bo, | |
1162 | unsigned long size, | |
1163 | enum ttm_bo_type type, | |
1164 | struct ttm_placement *placement, | |
1165 | uint32_t page_alignment, | |
1166 | unsigned long buffer_start, | |
1167 | bool interruptible, | |
1168 | struct file *persistant_swap_storage, | |
1169 | size_t acc_size, | |
1170 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1171 | { |
09855acb | 1172 | int ret = 0; |
ba4e7d97 TH |
1173 | unsigned long num_pages; |
1174 | ||
1175 | size += buffer_start & ~PAGE_MASK; | |
1176 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1177 | if (num_pages == 0) { | |
1178 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
1179 | return -EINVAL; | |
1180 | } | |
1181 | bo->destroy = destroy; | |
1182 | ||
1183 | spin_lock_init(&bo->lock); | |
1184 | kref_init(&bo->kref); | |
1185 | kref_init(&bo->list_kref); | |
1186 | atomic_set(&bo->cpu_writers, 0); | |
1187 | atomic_set(&bo->reserved, 1); | |
1188 | init_waitqueue_head(&bo->event_queue); | |
1189 | INIT_LIST_HEAD(&bo->lru); | |
1190 | INIT_LIST_HEAD(&bo->ddestroy); | |
1191 | INIT_LIST_HEAD(&bo->swap); | |
1192 | bo->bdev = bdev; | |
a987fcaa | 1193 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1194 | bo->type = type; |
1195 | bo->num_pages = num_pages; | |
eb6d2c39 | 1196 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1197 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1198 | bo->mem.num_pages = bo->num_pages; | |
1199 | bo->mem.mm_node = NULL; | |
1200 | bo->mem.page_alignment = page_alignment; | |
82c5da6b | 1201 | bo->mem.bus.io_reserved = false; |
ba4e7d97 TH |
1202 | bo->buffer_start = buffer_start & PAGE_MASK; |
1203 | bo->priv_flags = 0; | |
1204 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1205 | bo->seq_valid = false; | |
1206 | bo->persistant_swap_storage = persistant_swap_storage; | |
1207 | bo->acc_size = acc_size; | |
a987fcaa | 1208 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1209 | |
09855acb | 1210 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1211 | if (unlikely(ret != 0)) |
1212 | goto out_err; | |
1213 | ||
ba4e7d97 TH |
1214 | /* |
1215 | * For ttm_bo_type_device buffers, allocate | |
1216 | * address space from the device. | |
1217 | */ | |
ba4e7d97 TH |
1218 | if (bo->type == ttm_bo_type_device) { |
1219 | ret = ttm_bo_setup_vm(bo); | |
1220 | if (ret) | |
1221 | goto out_err; | |
1222 | } | |
1223 | ||
9d87fa21 | 1224 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1225 | if (ret) |
1226 | goto out_err; | |
1227 | ||
1228 | ttm_bo_unreserve(bo); | |
1229 | return 0; | |
1230 | ||
1231 | out_err: | |
1232 | ttm_bo_unreserve(bo); | |
1233 | ttm_bo_unref(&bo); | |
1234 | ||
1235 | return ret; | |
1236 | } | |
09855acb | 1237 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1238 | |
a987fcaa | 1239 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1240 | unsigned long num_pages) |
1241 | { | |
1242 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1243 | PAGE_MASK; | |
1244 | ||
a987fcaa | 1245 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1246 | } |
1247 | ||
09855acb JG |
1248 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1249 | unsigned long size, | |
1250 | enum ttm_bo_type type, | |
1251 | struct ttm_placement *placement, | |
1252 | uint32_t page_alignment, | |
1253 | unsigned long buffer_start, | |
1254 | bool interruptible, | |
1255 | struct file *persistant_swap_storage, | |
1256 | struct ttm_buffer_object **p_bo) | |
ba4e7d97 TH |
1257 | { |
1258 | struct ttm_buffer_object *bo; | |
a987fcaa | 1259 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1260 | int ret; |
ba4e7d97 TH |
1261 | |
1262 | size_t acc_size = | |
a987fcaa | 1263 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1264 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1265 | if (unlikely(ret != 0)) |
1266 | return ret; | |
1267 | ||
1268 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1269 | ||
1270 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1271 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1272 | return -ENOMEM; |
1273 | } | |
1274 | ||
09855acb JG |
1275 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1276 | buffer_start, interruptible, | |
1277 | persistant_swap_storage, acc_size, NULL); | |
ba4e7d97 TH |
1278 | if (likely(ret == 0)) |
1279 | *p_bo = bo; | |
1280 | ||
1281 | return ret; | |
1282 | } | |
1283 | ||
ba4e7d97 | 1284 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1285 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1286 | { |
ca262a99 | 1287 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1288 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1289 | int ret; |
ba4e7d97 TH |
1290 | |
1291 | /* | |
1292 | * Can't use standard list traversal since we're unlocking. | |
1293 | */ | |
1294 | ||
a987fcaa | 1295 | spin_lock(&glob->lru_lock); |
ca262a99 | 1296 | while (!list_empty(&man->lru)) { |
a987fcaa | 1297 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1298 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1299 | if (ret) { |
1300 | if (allow_errors) { | |
1301 | return ret; | |
1302 | } else { | |
1303 | printk(KERN_ERR TTM_PFX | |
1304 | "Cleanup eviction failed\n"); | |
1305 | } | |
1306 | } | |
a987fcaa | 1307 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1308 | } |
a987fcaa | 1309 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1310 | return 0; |
1311 | } | |
1312 | ||
1313 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1314 | { | |
c96e7c7a | 1315 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1316 | int ret = -EINVAL; |
1317 | ||
1318 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1319 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1320 | return ret; | |
1321 | } | |
c96e7c7a | 1322 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1323 | |
1324 | if (!man->has_type) { | |
1325 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1326 | "memory manager type %u\n", mem_type); | |
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | man->use_type = false; | |
1331 | man->has_type = false; | |
1332 | ||
1333 | ret = 0; | |
1334 | if (mem_type > 0) { | |
ca262a99 | 1335 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1336 | |
d961db75 | 1337 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1338 | } |
1339 | ||
1340 | return ret; | |
1341 | } | |
1342 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1343 | ||
1344 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1345 | { | |
1346 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1347 | ||
1348 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1349 | printk(KERN_ERR TTM_PFX | |
1350 | "Illegal memory manager memory type %u.\n", | |
1351 | mem_type); | |
1352 | return -EINVAL; | |
1353 | } | |
1354 | ||
1355 | if (!man->has_type) { | |
1356 | printk(KERN_ERR TTM_PFX | |
1357 | "Memory type %u has not been initialized.\n", | |
1358 | mem_type); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
ca262a99 | 1362 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1363 | } |
1364 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1365 | ||
1366 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1367 | unsigned long p_size) |
ba4e7d97 TH |
1368 | { |
1369 | int ret = -EINVAL; | |
1370 | struct ttm_mem_type_manager *man; | |
1371 | ||
1372 | if (type >= TTM_NUM_MEM_TYPES) { | |
1373 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); | |
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | man = &bdev->man[type]; | |
1378 | if (man->has_type) { | |
1379 | printk(KERN_ERR TTM_PFX | |
1380 | "Memory manager already initialized for type %d\n", | |
1381 | type); | |
1382 | return ret; | |
1383 | } | |
1384 | ||
1385 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1386 | if (ret) | |
1387 | return ret; | |
d961db75 | 1388 | man->bdev = bdev; |
ba4e7d97 TH |
1389 | |
1390 | ret = 0; | |
1391 | if (type != TTM_PL_SYSTEM) { | |
1392 | if (!p_size) { | |
1393 | printk(KERN_ERR TTM_PFX | |
1394 | "Zero size memory manager type %d\n", | |
1395 | type); | |
1396 | return ret; | |
1397 | } | |
d961db75 BS |
1398 | |
1399 | ret = (*man->func->init)(man, p_size); | |
ba4e7d97 TH |
1400 | if (ret) |
1401 | return ret; | |
1402 | } | |
1403 | man->has_type = true; | |
1404 | man->use_type = true; | |
1405 | man->size = p_size; | |
1406 | ||
1407 | INIT_LIST_HEAD(&man->lru); | |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1412 | ||
a987fcaa TH |
1413 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1414 | { | |
1415 | struct ttm_bo_global *glob = | |
1416 | container_of(kobj, struct ttm_bo_global, kobj); | |
1417 | ||
a987fcaa TH |
1418 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1419 | __free_page(glob->dummy_read_page); | |
1420 | kfree(glob); | |
1421 | } | |
1422 | ||
ba4420c2 | 1423 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1424 | { |
1425 | struct ttm_bo_global *glob = ref->object; | |
1426 | ||
1427 | kobject_del(&glob->kobj); | |
1428 | kobject_put(&glob->kobj); | |
1429 | } | |
1430 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1431 | ||
ba4420c2 | 1432 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1433 | { |
1434 | struct ttm_bo_global_ref *bo_ref = | |
1435 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1436 | struct ttm_bo_global *glob = ref->object; | |
1437 | int ret; | |
1438 | ||
1439 | mutex_init(&glob->device_list_mutex); | |
1440 | spin_lock_init(&glob->lru_lock); | |
1441 | glob->mem_glob = bo_ref->mem_glob; | |
1442 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1443 | ||
1444 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1445 | ret = -ENOMEM; | |
1446 | goto out_no_drp; | |
1447 | } | |
1448 | ||
1449 | INIT_LIST_HEAD(&glob->swap_lru); | |
1450 | INIT_LIST_HEAD(&glob->device_list); | |
1451 | ||
1452 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1453 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1454 | if (unlikely(ret != 0)) { | |
1455 | printk(KERN_ERR TTM_PFX | |
1456 | "Could not register buffer object swapout.\n"); | |
1457 | goto out_no_shrink; | |
1458 | } | |
1459 | ||
1460 | glob->ttm_bo_extra_size = | |
1461 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1462 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1463 | ||
1464 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1465 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1466 | ||
1467 | atomic_set(&glob->bo_count, 0); | |
1468 | ||
b642ed06 RD |
1469 | ret = kobject_init_and_add( |
1470 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1471 | if (unlikely(ret != 0)) |
1472 | kobject_put(&glob->kobj); | |
1473 | return ret; | |
1474 | out_no_shrink: | |
1475 | __free_page(glob->dummy_read_page); | |
1476 | out_no_drp: | |
1477 | kfree(glob); | |
1478 | return ret; | |
1479 | } | |
1480 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1481 | ||
1482 | ||
ba4e7d97 TH |
1483 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1484 | { | |
1485 | int ret = 0; | |
1486 | unsigned i = TTM_NUM_MEM_TYPES; | |
1487 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1488 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1489 | |
1490 | while (i--) { | |
1491 | man = &bdev->man[i]; | |
1492 | if (man->has_type) { | |
1493 | man->use_type = false; | |
1494 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1495 | ret = -EBUSY; | |
1496 | printk(KERN_ERR TTM_PFX | |
1497 | "DRM memory manager type %d " | |
1498 | "is not clean.\n", i); | |
1499 | } | |
1500 | man->has_type = false; | |
1501 | } | |
1502 | } | |
1503 | ||
a987fcaa TH |
1504 | mutex_lock(&glob->device_list_mutex); |
1505 | list_del(&bdev->device_list); | |
1506 | mutex_unlock(&glob->device_list_mutex); | |
1507 | ||
ba4e7d97 TH |
1508 | if (!cancel_delayed_work(&bdev->wq)) |
1509 | flush_scheduled_work(); | |
1510 | ||
1511 | while (ttm_bo_delayed_delete(bdev, true)) | |
1512 | ; | |
1513 | ||
a987fcaa | 1514 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1515 | if (list_empty(&bdev->ddestroy)) |
1516 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1517 | ||
1518 | if (list_empty(&bdev->man[0].lru)) | |
1519 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1520 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1521 | |
ba4e7d97 TH |
1522 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1523 | write_lock(&bdev->vm_lock); | |
1524 | drm_mm_takedown(&bdev->addr_space_mm); | |
1525 | write_unlock(&bdev->vm_lock); | |
1526 | ||
ba4e7d97 TH |
1527 | return ret; |
1528 | } | |
1529 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1530 | ||
ba4e7d97 | 1531 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1532 | struct ttm_bo_global *glob, |
1533 | struct ttm_bo_driver *driver, | |
51c8b407 | 1534 | uint64_t file_page_offset, |
ad49f501 | 1535 | bool need_dma32) |
ba4e7d97 TH |
1536 | { |
1537 | int ret = -EINVAL; | |
1538 | ||
ba4e7d97 | 1539 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1540 | bdev->driver = driver; |
ba4e7d97 TH |
1541 | |
1542 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1543 | ||
ba4e7d97 TH |
1544 | /* |
1545 | * Initialize the system memory buffer type. | |
1546 | * Other types need to be driver / IOCTL initialized. | |
1547 | */ | |
ca262a99 | 1548 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1549 | if (unlikely(ret != 0)) |
a987fcaa | 1550 | goto out_no_sys; |
ba4e7d97 TH |
1551 | |
1552 | bdev->addr_space_rb = RB_ROOT; | |
1553 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1554 | if (unlikely(ret != 0)) | |
a987fcaa | 1555 | goto out_no_addr_mm; |
ba4e7d97 TH |
1556 | |
1557 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1558 | bdev->nice_mode = true; | |
1559 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1560 | bdev->dev_mapping = NULL; |
a987fcaa | 1561 | bdev->glob = glob; |
ad49f501 | 1562 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1563 | |
a987fcaa TH |
1564 | mutex_lock(&glob->device_list_mutex); |
1565 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1566 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1567 | |
1568 | return 0; | |
a987fcaa | 1569 | out_no_addr_mm: |
ba4e7d97 | 1570 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1571 | out_no_sys: |
ba4e7d97 TH |
1572 | return ret; |
1573 | } | |
1574 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1575 | ||
1576 | /* | |
1577 | * buffer object vm functions. | |
1578 | */ | |
1579 | ||
1580 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1581 | { | |
1582 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1583 | ||
1584 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1585 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1586 | return false; | |
1587 | ||
1588 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1589 | return false; | |
1590 | ||
1591 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1592 | return false; | |
1593 | } | |
1594 | return true; | |
1595 | } | |
1596 | ||
ba4e7d97 TH |
1597 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) |
1598 | { | |
1599 | struct ttm_bo_device *bdev = bo->bdev; | |
1600 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1601 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1602 | ||
1603 | if (!bdev->dev_mapping) | |
1604 | return; | |
ba4e7d97 | 1605 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
82c5da6b | 1606 | ttm_mem_io_free(bdev, &bo->mem); |
ba4e7d97 | 1607 | } |
e024e110 | 1608 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1609 | |
1610 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1611 | { | |
1612 | struct ttm_bo_device *bdev = bo->bdev; | |
1613 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1614 | struct rb_node *parent = NULL; | |
1615 | struct ttm_buffer_object *cur_bo; | |
1616 | unsigned long offset = bo->vm_node->start; | |
1617 | unsigned long cur_offset; | |
1618 | ||
1619 | while (*cur) { | |
1620 | parent = *cur; | |
1621 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1622 | cur_offset = cur_bo->vm_node->start; | |
1623 | if (offset < cur_offset) | |
1624 | cur = &parent->rb_left; | |
1625 | else if (offset > cur_offset) | |
1626 | cur = &parent->rb_right; | |
1627 | else | |
1628 | BUG(); | |
1629 | } | |
1630 | ||
1631 | rb_link_node(&bo->vm_rb, parent, cur); | |
1632 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1633 | } | |
1634 | ||
1635 | /** | |
1636 | * ttm_bo_setup_vm: | |
1637 | * | |
1638 | * @bo: the buffer to allocate address space for | |
1639 | * | |
1640 | * Allocate address space in the drm device so that applications | |
1641 | * can mmap the buffer and access the contents. This only | |
1642 | * applies to ttm_bo_type_device objects as others are not | |
1643 | * placed in the drm device address space. | |
1644 | */ | |
1645 | ||
1646 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1647 | { | |
1648 | struct ttm_bo_device *bdev = bo->bdev; | |
1649 | int ret; | |
1650 | ||
1651 | retry_pre_get: | |
1652 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1653 | if (unlikely(ret != 0)) | |
1654 | return ret; | |
1655 | ||
1656 | write_lock(&bdev->vm_lock); | |
1657 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1658 | bo->mem.num_pages, 0, 0); | |
1659 | ||
1660 | if (unlikely(bo->vm_node == NULL)) { | |
1661 | ret = -ENOMEM; | |
1662 | goto out_unlock; | |
1663 | } | |
1664 | ||
1665 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1666 | bo->mem.num_pages, 0); | |
1667 | ||
1668 | if (unlikely(bo->vm_node == NULL)) { | |
1669 | write_unlock(&bdev->vm_lock); | |
1670 | goto retry_pre_get; | |
1671 | } | |
1672 | ||
1673 | ttm_bo_vm_insert_rb(bo); | |
1674 | write_unlock(&bdev->vm_lock); | |
1675 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1676 | ||
1677 | return 0; | |
1678 | out_unlock: | |
1679 | write_unlock(&bdev->vm_lock); | |
1680 | return ret; | |
1681 | } | |
1682 | ||
1683 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1684 | bool lazy, bool interruptible, bool no_wait) | |
1685 | { | |
1686 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1687 | void *sync_obj; | |
1688 | void *sync_obj_arg; | |
1689 | int ret = 0; | |
1690 | ||
1691 | if (likely(bo->sync_obj == NULL)) | |
1692 | return 0; | |
1693 | ||
1694 | while (bo->sync_obj) { | |
1695 | ||
1696 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1697 | void *tmp_obj = bo->sync_obj; | |
1698 | bo->sync_obj = NULL; | |
1699 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1700 | spin_unlock(&bo->lock); | |
1701 | driver->sync_obj_unref(&tmp_obj); | |
1702 | spin_lock(&bo->lock); | |
1703 | continue; | |
1704 | } | |
1705 | ||
1706 | if (no_wait) | |
1707 | return -EBUSY; | |
1708 | ||
1709 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1710 | sync_obj_arg = bo->sync_obj_arg; | |
1711 | spin_unlock(&bo->lock); | |
1712 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1713 | lazy, interruptible); | |
1714 | if (unlikely(ret != 0)) { | |
1715 | driver->sync_obj_unref(&sync_obj); | |
1716 | spin_lock(&bo->lock); | |
1717 | return ret; | |
1718 | } | |
1719 | spin_lock(&bo->lock); | |
1720 | if (likely(bo->sync_obj == sync_obj && | |
1721 | bo->sync_obj_arg == sync_obj_arg)) { | |
1722 | void *tmp_obj = bo->sync_obj; | |
1723 | bo->sync_obj = NULL; | |
1724 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1725 | &bo->priv_flags); | |
1726 | spin_unlock(&bo->lock); | |
1727 | driver->sync_obj_unref(&sync_obj); | |
1728 | driver->sync_obj_unref(&tmp_obj); | |
1729 | spin_lock(&bo->lock); | |
fee280d3 TH |
1730 | } else { |
1731 | spin_unlock(&bo->lock); | |
1732 | driver->sync_obj_unref(&sync_obj); | |
1733 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1734 | } |
1735 | } | |
1736 | return 0; | |
1737 | } | |
1738 | EXPORT_SYMBOL(ttm_bo_wait); | |
1739 | ||
ba4e7d97 TH |
1740 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1741 | { | |
1742 | int ret = 0; | |
1743 | ||
1744 | /* | |
8cfe92d6 | 1745 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1746 | */ |
1747 | ||
1748 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1749 | if (unlikely(ret != 0)) | |
1750 | return ret; | |
1751 | spin_lock(&bo->lock); | |
1752 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1753 | spin_unlock(&bo->lock); | |
1754 | if (likely(ret == 0)) | |
1755 | atomic_inc(&bo->cpu_writers); | |
1756 | ttm_bo_unreserve(bo); | |
1757 | return ret; | |
1758 | } | |
d1ede145 | 1759 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1760 | |
1761 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1762 | { | |
1763 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1764 | wake_up_all(&bo->event_queue); | |
1765 | } | |
d1ede145 | 1766 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1767 | |
1768 | /** | |
1769 | * A buffer object shrink method that tries to swap out the first | |
1770 | * buffer object on the bo_global::swap_lru list. | |
1771 | */ | |
1772 | ||
1773 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1774 | { | |
a987fcaa TH |
1775 | struct ttm_bo_global *glob = |
1776 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1777 | struct ttm_buffer_object *bo; |
1778 | int ret = -EBUSY; | |
1779 | int put_count; | |
1780 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1781 | ||
a987fcaa | 1782 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1783 | while (ret == -EBUSY) { |
a987fcaa TH |
1784 | if (unlikely(list_empty(&glob->swap_lru))) { |
1785 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1786 | return -EBUSY; |
1787 | } | |
1788 | ||
a987fcaa | 1789 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1790 | struct ttm_buffer_object, swap); |
1791 | kref_get(&bo->list_kref); | |
1792 | ||
e1efc9b6 TH |
1793 | if (!list_empty(&bo->ddestroy)) { |
1794 | spin_unlock(&glob->lru_lock); | |
1795 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1796 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1797 | continue; | |
1798 | } | |
1799 | ||
ba4e7d97 TH |
1800 | /** |
1801 | * Reserve buffer. Since we unlock while sleeping, we need | |
1802 | * to re-check that nobody removed us from the swap-list while | |
1803 | * we slept. | |
1804 | */ | |
1805 | ||
1806 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1807 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1808 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1809 | ttm_bo_wait_unreserved(bo, false); |
1810 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1811 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1812 | } |
1813 | } | |
1814 | ||
1815 | BUG_ON(ret != 0); | |
1816 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1817 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1818 | |
1819 | while (put_count--) | |
1820 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
1821 | ||
1822 | /** | |
1823 | * Wait for GPU, then move to system cached. | |
1824 | */ | |
1825 | ||
1826 | spin_lock(&bo->lock); | |
1827 | ret = ttm_bo_wait(bo, false, false, false); | |
1828 | spin_unlock(&bo->lock); | |
1829 | ||
1830 | if (unlikely(ret != 0)) | |
1831 | goto out; | |
1832 | ||
1833 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1834 | struct ttm_mem_reg evict_mem; | |
1835 | ||
1836 | evict_mem = bo->mem; | |
1837 | evict_mem.mm_node = NULL; | |
1838 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1839 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1840 | ||
1841 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1842 | false, false, false); |
ba4e7d97 TH |
1843 | if (unlikely(ret != 0)) |
1844 | goto out; | |
1845 | } | |
1846 | ||
1847 | ttm_bo_unmap_virtual(bo); | |
1848 | ||
1849 | /** | |
1850 | * Swap out. Buffer will be swapped in again as soon as | |
1851 | * anyone tries to access a ttm page. | |
1852 | */ | |
1853 | ||
3f09ea4e TH |
1854 | if (bo->bdev->driver->swap_notify) |
1855 | bo->bdev->driver->swap_notify(bo); | |
1856 | ||
ba4e7d97 TH |
1857 | ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage); |
1858 | out: | |
1859 | ||
1860 | /** | |
1861 | * | |
1862 | * Unreserve without putting on LRU to avoid swapping out an | |
1863 | * already swapped buffer. | |
1864 | */ | |
1865 | ||
1866 | atomic_set(&bo->reserved, 0); | |
1867 | wake_up_all(&bo->event_queue); | |
1868 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1869 | return ret; | |
1870 | } | |
1871 | ||
1872 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1873 | { | |
a987fcaa | 1874 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1875 | ; |
1876 | } | |
e99e1e78 | 1877 | EXPORT_SYMBOL(ttm_bo_swapout_all); |