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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); | |
82 | printk(KERN_ERR TTM_PFX " io_offset: 0x%08lX\n", man->io_offset); | |
83 | printk(KERN_ERR TTM_PFX " io_size: %ld\n", man->io_size); | |
eb6d2c39 | 84 | printk(KERN_ERR TTM_PFX " size: %llu\n", man->size); |
fb53f862 JG |
85 | printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n", |
86 | man->available_caching); | |
87 | printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n", | |
88 | man->default_caching); | |
5012f506 JG |
89 | if (mem_type != TTM_PL_SYSTEM) { |
90 | spin_lock(&bdev->glob->lru_lock); | |
91 | drm_mm_debug_table(&man->manager, TTM_PFX); | |
92 | spin_unlock(&bdev->glob->lru_lock); | |
93 | } | |
fb53f862 JG |
94 | } |
95 | ||
96 | static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, | |
97 | struct ttm_placement *placement) | |
98 | { | |
fb53f862 JG |
99 | int i, ret, mem_type; |
100 | ||
eb6d2c39 | 101 | printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n", |
fb53f862 JG |
102 | bo, bo->mem.num_pages, bo->mem.size >> 10, |
103 | bo->mem.size >> 20); | |
104 | for (i = 0; i < placement->num_placement; i++) { | |
105 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
106 | &mem_type); | |
107 | if (ret) | |
108 | return; | |
fb53f862 JG |
109 | printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n", |
110 | i, placement->placement[i], mem_type); | |
5012f506 | 111 | ttm_mem_type_debug(bo->bdev, mem_type); |
fb53f862 JG |
112 | } |
113 | } | |
114 | ||
a987fcaa TH |
115 | static ssize_t ttm_bo_global_show(struct kobject *kobj, |
116 | struct attribute *attr, | |
117 | char *buffer) | |
118 | { | |
119 | struct ttm_bo_global *glob = | |
120 | container_of(kobj, struct ttm_bo_global, kobj); | |
121 | ||
122 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
123 | (unsigned long) atomic_read(&glob->bo_count)); | |
124 | } | |
125 | ||
126 | static struct attribute *ttm_bo_global_attrs[] = { | |
127 | &ttm_bo_count, | |
128 | NULL | |
129 | }; | |
130 | ||
52cf25d0 | 131 | static const struct sysfs_ops ttm_bo_global_ops = { |
a987fcaa TH |
132 | .show = &ttm_bo_global_show |
133 | }; | |
134 | ||
135 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
136 | .release = &ttm_bo_global_kobj_release, | |
137 | .sysfs_ops = &ttm_bo_global_ops, | |
138 | .default_attrs = ttm_bo_global_attrs | |
139 | }; | |
140 | ||
ba4e7d97 TH |
141 | |
142 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
143 | { | |
144 | return 1 << (type); | |
145 | } | |
146 | ||
147 | static void ttm_bo_release_list(struct kref *list_kref) | |
148 | { | |
149 | struct ttm_buffer_object *bo = | |
150 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
151 | struct ttm_bo_device *bdev = bo->bdev; | |
152 | ||
153 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
154 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
155 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
156 | BUG_ON(bo->sync_obj != NULL); | |
157 | BUG_ON(bo->mem.mm_node != NULL); | |
158 | BUG_ON(!list_empty(&bo->lru)); | |
159 | BUG_ON(!list_empty(&bo->ddestroy)); | |
160 | ||
161 | if (bo->ttm) | |
162 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 163 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
164 | if (bo->destroy) |
165 | bo->destroy(bo); | |
166 | else { | |
a987fcaa | 167 | ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size); |
ba4e7d97 TH |
168 | kfree(bo); |
169 | } | |
170 | } | |
171 | ||
172 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
173 | { | |
174 | ||
175 | if (interruptible) { | |
176 | int ret = 0; | |
177 | ||
178 | ret = wait_event_interruptible(bo->event_queue, | |
179 | atomic_read(&bo->reserved) == 0); | |
180 | if (unlikely(ret != 0)) | |
98ffc415 | 181 | return ret; |
ba4e7d97 TH |
182 | } else { |
183 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
184 | } | |
185 | return 0; | |
186 | } | |
d1ede145 | 187 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 TH |
188 | |
189 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
190 | { | |
191 | struct ttm_bo_device *bdev = bo->bdev; | |
192 | struct ttm_mem_type_manager *man; | |
193 | ||
194 | BUG_ON(!atomic_read(&bo->reserved)); | |
195 | ||
196 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
197 | ||
198 | BUG_ON(!list_empty(&bo->lru)); | |
199 | ||
200 | man = &bdev->man[bo->mem.mem_type]; | |
201 | list_add_tail(&bo->lru, &man->lru); | |
202 | kref_get(&bo->list_kref); | |
203 | ||
204 | if (bo->ttm != NULL) { | |
a987fcaa | 205 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
206 | kref_get(&bo->list_kref); |
207 | } | |
208 | } | |
209 | } | |
210 | ||
211 | /** | |
212 | * Call with the lru_lock held. | |
213 | */ | |
214 | ||
215 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
216 | { | |
217 | int put_count = 0; | |
218 | ||
219 | if (!list_empty(&bo->swap)) { | |
220 | list_del_init(&bo->swap); | |
221 | ++put_count; | |
222 | } | |
223 | if (!list_empty(&bo->lru)) { | |
224 | list_del_init(&bo->lru); | |
225 | ++put_count; | |
226 | } | |
227 | ||
228 | /* | |
229 | * TODO: Add a driver hook to delete from | |
230 | * driver-specific LRU's here. | |
231 | */ | |
232 | ||
233 | return put_count; | |
234 | } | |
235 | ||
236 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
237 | bool interruptible, | |
238 | bool no_wait, bool use_sequence, uint32_t sequence) | |
239 | { | |
a987fcaa | 240 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
241 | int ret; |
242 | ||
243 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
244 | if (use_sequence && bo->seq_valid && | |
245 | (sequence - bo->val_seq < (1 << 31))) { | |
246 | return -EAGAIN; | |
247 | } | |
248 | ||
249 | if (no_wait) | |
250 | return -EBUSY; | |
251 | ||
a987fcaa | 252 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 253 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 254 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
255 | |
256 | if (unlikely(ret)) | |
257 | return ret; | |
258 | } | |
259 | ||
260 | if (use_sequence) { | |
261 | bo->val_seq = sequence; | |
262 | bo->seq_valid = true; | |
263 | } else { | |
264 | bo->seq_valid = false; | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | EXPORT_SYMBOL(ttm_bo_reserve); | |
270 | ||
271 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
272 | { | |
273 | BUG(); | |
274 | } | |
275 | ||
276 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
277 | bool interruptible, | |
278 | bool no_wait, bool use_sequence, uint32_t sequence) | |
279 | { | |
a987fcaa | 280 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
281 | int put_count = 0; |
282 | int ret; | |
283 | ||
a987fcaa | 284 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
285 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
286 | sequence); | |
287 | if (likely(ret == 0)) | |
288 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 289 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
290 | |
291 | while (put_count--) | |
292 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
297 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
298 | { | |
a987fcaa | 299 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 300 | |
a987fcaa | 301 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
302 | ttm_bo_add_to_lru(bo); |
303 | atomic_set(&bo->reserved, 0); | |
304 | wake_up_all(&bo->event_queue); | |
a987fcaa | 305 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
306 | } |
307 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
308 | ||
309 | /* | |
310 | * Call bo->mutex locked. | |
311 | */ | |
ba4e7d97 TH |
312 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
313 | { | |
314 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 315 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
316 | int ret = 0; |
317 | uint32_t page_flags = 0; | |
318 | ||
319 | TTM_ASSERT_LOCKED(&bo->mutex); | |
320 | bo->ttm = NULL; | |
321 | ||
ad49f501 DA |
322 | if (bdev->need_dma32) |
323 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
324 | ||
ba4e7d97 TH |
325 | switch (bo->type) { |
326 | case ttm_bo_type_device: | |
327 | if (zero_alloc) | |
328 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
329 | case ttm_bo_type_kernel: | |
330 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 331 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
332 | if (unlikely(bo->ttm == NULL)) |
333 | ret = -ENOMEM; | |
334 | break; | |
335 | case ttm_bo_type_user: | |
336 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
337 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 338 | glob->dummy_read_page); |
447aeb90 | 339 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 340 | ret = -ENOMEM; |
447aeb90 DA |
341 | break; |
342 | } | |
ba4e7d97 TH |
343 | |
344 | ret = ttm_tt_set_user(bo->ttm, current, | |
345 | bo->buffer_start, bo->num_pages); | |
346 | if (unlikely(ret != 0)) | |
347 | ttm_tt_destroy(bo->ttm); | |
348 | break; | |
349 | default: | |
350 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
351 | ret = -EINVAL; | |
352 | break; | |
353 | } | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
358 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
359 | struct ttm_mem_reg *mem, | |
360 | bool evict, bool interruptible, bool no_wait) | |
361 | { | |
362 | struct ttm_bo_device *bdev = bo->bdev; | |
363 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
364 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
365 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
366 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
367 | int ret = 0; | |
368 | ||
369 | if (old_is_pci || new_is_pci || | |
370 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
371 | ttm_bo_unmap_virtual(bo); | |
372 | ||
373 | /* | |
374 | * Create and bind a ttm if required. | |
375 | */ | |
376 | ||
377 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
378 | ret = ttm_bo_add_ttm(bo, false); | |
379 | if (ret) | |
380 | goto out_err; | |
381 | ||
382 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
383 | if (ret) | |
87ef9209 | 384 | goto out_err; |
ba4e7d97 TH |
385 | |
386 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
387 | ret = ttm_tt_bind(bo->ttm, mem); | |
388 | if (ret) | |
389 | goto out_err; | |
390 | } | |
391 | ||
392 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 393 | bo->mem = *mem; |
ba4e7d97 | 394 | mem->mm_node = NULL; |
ba4e7d97 TH |
395 | goto moved; |
396 | } | |
397 | ||
398 | } | |
399 | ||
e024e110 DA |
400 | if (bdev->driver->move_notify) |
401 | bdev->driver->move_notify(bo, mem); | |
402 | ||
ba4e7d97 TH |
403 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
404 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
405 | ret = ttm_bo_move_ttm(bo, evict, no_wait, mem); | |
406 | else if (bdev->driver->move) | |
407 | ret = bdev->driver->move(bo, evict, interruptible, | |
408 | no_wait, mem); | |
409 | else | |
410 | ret = ttm_bo_move_memcpy(bo, evict, no_wait, mem); | |
411 | ||
412 | if (ret) | |
413 | goto out_err; | |
414 | ||
415 | moved: | |
416 | if (bo->evicted) { | |
417 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
418 | if (ret) | |
419 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
420 | bo->evicted = false; | |
421 | } | |
422 | ||
423 | if (bo->mem.mm_node) { | |
424 | spin_lock(&bo->lock); | |
425 | bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) + | |
426 | bdev->man[bo->mem.mem_type].gpu_offset; | |
427 | bo->cur_placement = bo->mem.placement; | |
428 | spin_unlock(&bo->lock); | |
354fb52c TH |
429 | } else |
430 | bo->offset = 0; | |
ba4e7d97 TH |
431 | |
432 | return 0; | |
433 | ||
434 | out_err: | |
435 | new_man = &bdev->man[bo->mem.mem_type]; | |
436 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
437 | ttm_tt_unbind(bo->ttm); | |
438 | ttm_tt_destroy(bo->ttm); | |
439 | bo->ttm = NULL; | |
440 | } | |
441 | ||
442 | return ret; | |
443 | } | |
444 | ||
445 | /** | |
446 | * If bo idle, remove from delayed- and lru lists, and unref. | |
447 | * If not idle, and already on delayed list, do nothing. | |
448 | * If not idle, and not on delayed list, put on delayed list, | |
449 | * up the list_kref and schedule a delayed list check. | |
450 | */ | |
451 | ||
452 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all) | |
453 | { | |
454 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 455 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
456 | struct ttm_bo_driver *driver = bdev->driver; |
457 | int ret; | |
458 | ||
459 | spin_lock(&bo->lock); | |
460 | (void) ttm_bo_wait(bo, false, false, !remove_all); | |
461 | ||
462 | if (!bo->sync_obj) { | |
463 | int put_count; | |
464 | ||
465 | spin_unlock(&bo->lock); | |
466 | ||
a987fcaa | 467 | spin_lock(&glob->lru_lock); |
aaa20736 TH |
468 | put_count = ttm_bo_del_from_lru(bo); |
469 | ||
ba4e7d97 TH |
470 | ret = ttm_bo_reserve_locked(bo, false, false, false, 0); |
471 | BUG_ON(ret); | |
472 | if (bo->ttm) | |
473 | ttm_tt_unbind(bo->ttm); | |
474 | ||
475 | if (!list_empty(&bo->ddestroy)) { | |
476 | list_del_init(&bo->ddestroy); | |
aaa20736 | 477 | ++put_count; |
ba4e7d97 TH |
478 | } |
479 | if (bo->mem.mm_node) { | |
ca262a99 | 480 | bo->mem.mm_node->private = NULL; |
ba4e7d97 TH |
481 | drm_mm_put_block(bo->mem.mm_node); |
482 | bo->mem.mm_node = NULL; | |
483 | } | |
a987fcaa | 484 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
485 | |
486 | atomic_set(&bo->reserved, 0); | |
487 | ||
488 | while (put_count--) | |
aaa20736 | 489 | kref_put(&bo->list_kref, ttm_bo_ref_bug); |
ba4e7d97 TH |
490 | |
491 | return 0; | |
492 | } | |
493 | ||
a987fcaa | 494 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
495 | if (list_empty(&bo->ddestroy)) { |
496 | void *sync_obj = bo->sync_obj; | |
497 | void *sync_obj_arg = bo->sync_obj_arg; | |
498 | ||
499 | kref_get(&bo->list_kref); | |
500 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
a987fcaa | 501 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
502 | spin_unlock(&bo->lock); |
503 | ||
504 | if (sync_obj) | |
505 | driver->sync_obj_flush(sync_obj, sync_obj_arg); | |
506 | schedule_delayed_work(&bdev->wq, | |
507 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
508 | ret = 0; | |
509 | ||
510 | } else { | |
a987fcaa | 511 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
512 | spin_unlock(&bo->lock); |
513 | ret = -EBUSY; | |
514 | } | |
515 | ||
516 | return ret; | |
517 | } | |
518 | ||
519 | /** | |
520 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
521 | * encountered buffers. | |
522 | */ | |
523 | ||
524 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
525 | { | |
a987fcaa | 526 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
527 | struct ttm_buffer_object *entry = NULL; |
528 | int ret = 0; | |
ba4e7d97 | 529 | |
a987fcaa | 530 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
531 | if (list_empty(&bdev->ddestroy)) |
532 | goto out_unlock; | |
533 | ||
534 | entry = list_first_entry(&bdev->ddestroy, | |
535 | struct ttm_buffer_object, ddestroy); | |
536 | kref_get(&entry->list_kref); | |
537 | ||
538 | for (;;) { | |
539 | struct ttm_buffer_object *nentry = NULL; | |
540 | ||
541 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
542 | nentry = list_first_entry(&entry->ddestroy, | |
543 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
544 | kref_get(&nentry->list_kref); |
545 | } | |
ba4e7d97 | 546 | |
a987fcaa | 547 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
548 | ret = ttm_bo_cleanup_refs(entry, remove_all); |
549 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
1a961ce0 LB |
550 | entry = nentry; |
551 | ||
552 | if (ret || !entry) | |
553 | goto out; | |
ba4e7d97 | 554 | |
a987fcaa | 555 | spin_lock(&glob->lru_lock); |
1a961ce0 | 556 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
557 | break; |
558 | } | |
ba4e7d97 | 559 | |
1a961ce0 LB |
560 | out_unlock: |
561 | spin_unlock(&glob->lru_lock); | |
562 | out: | |
563 | if (entry) | |
564 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
565 | return ret; |
566 | } | |
567 | ||
568 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
569 | { | |
570 | struct ttm_bo_device *bdev = | |
571 | container_of(work, struct ttm_bo_device, wq.work); | |
572 | ||
573 | if (ttm_bo_delayed_delete(bdev, false)) { | |
574 | schedule_delayed_work(&bdev->wq, | |
575 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
576 | } | |
577 | } | |
578 | ||
579 | static void ttm_bo_release(struct kref *kref) | |
580 | { | |
581 | struct ttm_buffer_object *bo = | |
582 | container_of(kref, struct ttm_buffer_object, kref); | |
583 | struct ttm_bo_device *bdev = bo->bdev; | |
584 | ||
585 | if (likely(bo->vm_node != NULL)) { | |
586 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
587 | drm_mm_put_block(bo->vm_node); | |
588 | bo->vm_node = NULL; | |
589 | } | |
590 | write_unlock(&bdev->vm_lock); | |
591 | ttm_bo_cleanup_refs(bo, false); | |
592 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
593 | write_lock(&bdev->vm_lock); | |
594 | } | |
595 | ||
596 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
597 | { | |
598 | struct ttm_buffer_object *bo = *p_bo; | |
599 | struct ttm_bo_device *bdev = bo->bdev; | |
600 | ||
601 | *p_bo = NULL; | |
602 | write_lock(&bdev->vm_lock); | |
603 | kref_put(&bo->kref, ttm_bo_release); | |
604 | write_unlock(&bdev->vm_lock); | |
605 | } | |
606 | EXPORT_SYMBOL(ttm_bo_unref); | |
607 | ||
ca262a99 JG |
608 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
609 | bool no_wait) | |
ba4e7d97 | 610 | { |
ba4e7d97 | 611 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 612 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 613 | struct ttm_mem_reg evict_mem; |
ca262a99 JG |
614 | struct ttm_placement placement; |
615 | int ret = 0; | |
ba4e7d97 TH |
616 | |
617 | spin_lock(&bo->lock); | |
618 | ret = ttm_bo_wait(bo, false, interruptible, no_wait); | |
619 | spin_unlock(&bo->lock); | |
620 | ||
78ecf091 | 621 | if (unlikely(ret != 0)) { |
98ffc415 | 622 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
623 | printk(KERN_ERR TTM_PFX |
624 | "Failed to expire sync object before " | |
625 | "buffer eviction.\n"); | |
626 | } | |
ba4e7d97 TH |
627 | goto out; |
628 | } | |
629 | ||
630 | BUG_ON(!atomic_read(&bo->reserved)); | |
631 | ||
632 | evict_mem = bo->mem; | |
633 | evict_mem.mm_node = NULL; | |
634 | ||
7cb7d1d7 JG |
635 | placement.fpfn = 0; |
636 | placement.lpfn = 0; | |
637 | placement.num_placement = 0; | |
638 | placement.num_busy_placement = 0; | |
ca262a99 JG |
639 | bdev->driver->evict_flags(bo, &placement); |
640 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
641 | no_wait); | |
ba4e7d97 | 642 | if (ret) { |
fb53f862 | 643 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
644 | printk(KERN_ERR TTM_PFX |
645 | "Failed to find memory space for " | |
646 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
647 | ttm_bo_mem_space_debug(bo, &placement); |
648 | } | |
ba4e7d97 TH |
649 | goto out; |
650 | } | |
651 | ||
652 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
653 | no_wait); | |
654 | if (ret) { | |
98ffc415 | 655 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 656 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
ca262a99 JG |
657 | spin_lock(&glob->lru_lock); |
658 | if (evict_mem.mm_node) { | |
659 | evict_mem.mm_node->private = NULL; | |
660 | drm_mm_put_block(evict_mem.mm_node); | |
661 | evict_mem.mm_node = NULL; | |
662 | } | |
663 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
664 | goto out; |
665 | } | |
ca262a99 JG |
666 | bo->evicted = true; |
667 | out: | |
668 | return ret; | |
669 | } | |
670 | ||
671 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
672 | uint32_t mem_type, | |
673 | bool interruptible, bool no_wait) | |
674 | { | |
675 | struct ttm_bo_global *glob = bdev->glob; | |
676 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
677 | struct ttm_buffer_object *bo; | |
678 | int ret, put_count = 0; | |
ba4e7d97 | 679 | |
9c51ba1d | 680 | retry: |
a987fcaa | 681 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
682 | if (list_empty(&man->lru)) { |
683 | spin_unlock(&glob->lru_lock); | |
684 | return -EBUSY; | |
685 | } | |
686 | ||
ca262a99 JG |
687 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
688 | kref_get(&bo->list_kref); | |
9c51ba1d TH |
689 | |
690 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
691 | ||
692 | if (unlikely(ret == -EBUSY)) { | |
693 | spin_unlock(&glob->lru_lock); | |
694 | if (likely(!no_wait)) | |
695 | ret = ttm_bo_wait_unreserved(bo, interruptible); | |
696 | ||
697 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
698 | ||
699 | /** | |
700 | * We *need* to retry after releasing the lru lock. | |
701 | */ | |
702 | ||
703 | if (unlikely(ret != 0)) | |
704 | return ret; | |
705 | goto retry; | |
706 | } | |
707 | ||
708 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 709 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
710 | |
711 | BUG_ON(ret != 0); | |
712 | ||
ca262a99 JG |
713 | while (put_count--) |
714 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
9c51ba1d | 715 | |
ca262a99 JG |
716 | ret = ttm_bo_evict(bo, interruptible, no_wait); |
717 | ttm_bo_unreserve(bo); | |
9c51ba1d | 718 | |
ca262a99 | 719 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
720 | return ret; |
721 | } | |
722 | ||
ca262a99 JG |
723 | static int ttm_bo_man_get_node(struct ttm_buffer_object *bo, |
724 | struct ttm_mem_type_manager *man, | |
725 | struct ttm_placement *placement, | |
726 | struct ttm_mem_reg *mem, | |
727 | struct drm_mm_node **node) | |
728 | { | |
729 | struct ttm_bo_global *glob = bo->glob; | |
730 | unsigned long lpfn; | |
731 | int ret; | |
732 | ||
733 | lpfn = placement->lpfn; | |
734 | if (!lpfn) | |
735 | lpfn = man->size; | |
736 | *node = NULL; | |
737 | do { | |
738 | ret = drm_mm_pre_get(&man->manager); | |
739 | if (unlikely(ret)) | |
740 | return ret; | |
741 | ||
742 | spin_lock(&glob->lru_lock); | |
743 | *node = drm_mm_search_free_in_range(&man->manager, | |
744 | mem->num_pages, mem->page_alignment, | |
745 | placement->fpfn, lpfn, 1); | |
746 | if (unlikely(*node == NULL)) { | |
747 | spin_unlock(&glob->lru_lock); | |
748 | return 0; | |
749 | } | |
750 | *node = drm_mm_get_block_atomic_range(*node, mem->num_pages, | |
751 | mem->page_alignment, | |
752 | placement->fpfn, | |
753 | lpfn); | |
754 | spin_unlock(&glob->lru_lock); | |
755 | } while (*node == NULL); | |
756 | return 0; | |
757 | } | |
758 | ||
ba4e7d97 TH |
759 | /** |
760 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
761 | * space, or we've evicted everything and there isn't enough space. | |
762 | */ | |
ca262a99 JG |
763 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
764 | uint32_t mem_type, | |
765 | struct ttm_placement *placement, | |
766 | struct ttm_mem_reg *mem, | |
767 | bool interruptible, bool no_wait) | |
ba4e7d97 | 768 | { |
ca262a99 | 769 | struct ttm_bo_device *bdev = bo->bdev; |
a987fcaa | 770 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 771 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ca262a99 | 772 | struct drm_mm_node *node; |
ba4e7d97 TH |
773 | int ret; |
774 | ||
ba4e7d97 | 775 | do { |
ca262a99 JG |
776 | ret = ttm_bo_man_get_node(bo, man, placement, mem, &node); |
777 | if (unlikely(ret != 0)) | |
778 | return ret; | |
ba4e7d97 TH |
779 | if (node) |
780 | break; | |
ca262a99 JG |
781 | spin_lock(&glob->lru_lock); |
782 | if (list_empty(&man->lru)) { | |
783 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 | 784 | break; |
ca262a99 | 785 | } |
a987fcaa | 786 | spin_unlock(&glob->lru_lock); |
ca262a99 JG |
787 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
788 | no_wait); | |
ba4e7d97 TH |
789 | if (unlikely(ret != 0)) |
790 | return ret; | |
ba4e7d97 | 791 | } while (1); |
ca262a99 | 792 | if (node == NULL) |
ba4e7d97 | 793 | return -ENOMEM; |
ba4e7d97 TH |
794 | mem->mm_node = node; |
795 | mem->mem_type = mem_type; | |
796 | return 0; | |
797 | } | |
798 | ||
ae3e8122 TH |
799 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
800 | uint32_t cur_placement, | |
801 | uint32_t proposed_placement) | |
802 | { | |
803 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
804 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
805 | ||
806 | /** | |
807 | * Keep current caching if possible. | |
808 | */ | |
809 | ||
810 | if ((cur_placement & caching) != 0) | |
811 | result |= (cur_placement & caching); | |
812 | else if ((man->default_caching & caching) != 0) | |
813 | result |= man->default_caching; | |
814 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
815 | result |= TTM_PL_FLAG_CACHED; | |
816 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
817 | result |= TTM_PL_FLAG_WC; | |
818 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
819 | result |= TTM_PL_FLAG_UNCACHED; | |
820 | ||
821 | return result; | |
822 | } | |
823 | ||
ba4e7d97 TH |
824 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
825 | bool disallow_fixed, | |
826 | uint32_t mem_type, | |
ae3e8122 TH |
827 | uint32_t proposed_placement, |
828 | uint32_t *masked_placement) | |
ba4e7d97 TH |
829 | { |
830 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
831 | ||
832 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
833 | return false; | |
834 | ||
ae3e8122 | 835 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
836 | return false; |
837 | ||
ae3e8122 | 838 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 839 | return false; |
ba4e7d97 | 840 | |
ae3e8122 TH |
841 | cur_flags |= (proposed_placement & man->available_caching); |
842 | ||
843 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
844 | return true; |
845 | } | |
846 | ||
847 | /** | |
848 | * Creates space for memory region @mem according to its type. | |
849 | * | |
850 | * This function first searches for free space in compatible memory types in | |
851 | * the priority order defined by the driver. If free space isn't found, then | |
852 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
853 | * space. | |
854 | */ | |
855 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
856 | struct ttm_placement *placement, |
857 | struct ttm_mem_reg *mem, | |
858 | bool interruptible, bool no_wait) | |
ba4e7d97 TH |
859 | { |
860 | struct ttm_bo_device *bdev = bo->bdev; | |
861 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
862 | uint32_t mem_type = TTM_PL_SYSTEM; |
863 | uint32_t cur_flags = 0; | |
864 | bool type_found = false; | |
865 | bool type_ok = false; | |
98ffc415 | 866 | bool has_erestartsys = false; |
ba4e7d97 | 867 | struct drm_mm_node *node = NULL; |
ca262a99 | 868 | int i, ret; |
ba4e7d97 TH |
869 | |
870 | mem->mm_node = NULL; | |
b6637526 | 871 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
872 | ret = ttm_mem_type_from_flags(placement->placement[i], |
873 | &mem_type); | |
874 | if (ret) | |
875 | return ret; | |
ba4e7d97 TH |
876 | man = &bdev->man[mem_type]; |
877 | ||
878 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
879 | bo->type == ttm_bo_type_user, |
880 | mem_type, | |
881 | placement->placement[i], | |
882 | &cur_flags); | |
ba4e7d97 TH |
883 | |
884 | if (!type_ok) | |
885 | continue; | |
886 | ||
ae3e8122 TH |
887 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
888 | cur_flags); | |
ca262a99 JG |
889 | /* |
890 | * Use the access and other non-mapping-related flag bits from | |
891 | * the memory placement flags to the current flags | |
892 | */ | |
893 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
894 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 895 | |
ba4e7d97 TH |
896 | if (mem_type == TTM_PL_SYSTEM) |
897 | break; | |
898 | ||
899 | if (man->has_type && man->use_type) { | |
900 | type_found = true; | |
ca262a99 JG |
901 | ret = ttm_bo_man_get_node(bo, man, placement, mem, |
902 | &node); | |
903 | if (unlikely(ret)) | |
904 | return ret; | |
ba4e7d97 TH |
905 | } |
906 | if (node) | |
907 | break; | |
908 | } | |
909 | ||
910 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) { | |
911 | mem->mm_node = node; | |
912 | mem->mem_type = mem_type; | |
913 | mem->placement = cur_flags; | |
ca262a99 JG |
914 | if (node) |
915 | node->private = bo; | |
ba4e7d97 TH |
916 | return 0; |
917 | } | |
918 | ||
919 | if (!type_found) | |
920 | return -EINVAL; | |
921 | ||
b6637526 DA |
922 | for (i = 0; i < placement->num_busy_placement; ++i) { |
923 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
924 | &mem_type); |
925 | if (ret) | |
926 | return ret; | |
ba4e7d97 | 927 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
928 | if (!man->has_type) |
929 | continue; | |
ba4e7d97 | 930 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
931 | bo->type == ttm_bo_type_user, |
932 | mem_type, | |
b6637526 | 933 | placement->busy_placement[i], |
ca262a99 | 934 | &cur_flags)) |
ba4e7d97 TH |
935 | continue; |
936 | ||
ae3e8122 TH |
937 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
938 | cur_flags); | |
ca262a99 JG |
939 | /* |
940 | * Use the access and other non-mapping-related flag bits from | |
941 | * the memory placement flags to the current flags | |
942 | */ | |
b6637526 | 943 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 944 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 945 | |
0eaddb28 TH |
946 | |
947 | if (mem_type == TTM_PL_SYSTEM) { | |
948 | mem->mem_type = mem_type; | |
949 | mem->placement = cur_flags; | |
950 | mem->mm_node = NULL; | |
951 | return 0; | |
952 | } | |
953 | ||
ca262a99 JG |
954 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
955 | interruptible, no_wait); | |
ba4e7d97 TH |
956 | if (ret == 0 && mem->mm_node) { |
957 | mem->placement = cur_flags; | |
ca262a99 | 958 | mem->mm_node->private = bo; |
ba4e7d97 TH |
959 | return 0; |
960 | } | |
98ffc415 TH |
961 | if (ret == -ERESTARTSYS) |
962 | has_erestartsys = true; | |
ba4e7d97 | 963 | } |
98ffc415 | 964 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
965 | return ret; |
966 | } | |
967 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
968 | ||
969 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
970 | { | |
ba4e7d97 TH |
971 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
972 | return -EBUSY; | |
973 | ||
98ffc415 TH |
974 | return wait_event_interruptible(bo->event_queue, |
975 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 976 | } |
d1ede145 | 977 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
978 | |
979 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 JG |
980 | struct ttm_placement *placement, |
981 | bool interruptible, bool no_wait) | |
ba4e7d97 | 982 | { |
a987fcaa | 983 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
984 | int ret = 0; |
985 | struct ttm_mem_reg mem; | |
986 | ||
987 | BUG_ON(!atomic_read(&bo->reserved)); | |
988 | ||
989 | /* | |
990 | * FIXME: It's possible to pipeline buffer moves. | |
991 | * Have the driver move function wait for idle when necessary, | |
992 | * instead of doing it here. | |
993 | */ | |
ba4e7d97 TH |
994 | spin_lock(&bo->lock); |
995 | ret = ttm_bo_wait(bo, false, interruptible, no_wait); | |
996 | spin_unlock(&bo->lock); | |
ba4e7d97 TH |
997 | if (ret) |
998 | return ret; | |
ba4e7d97 TH |
999 | mem.num_pages = bo->num_pages; |
1000 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1001 | mem.page_alignment = bo->mem.page_alignment; | |
ba4e7d97 TH |
1002 | /* |
1003 | * Determine where to move the buffer. | |
1004 | */ | |
ca262a99 | 1005 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait); |
ba4e7d97 TH |
1006 | if (ret) |
1007 | goto out_unlock; | |
ba4e7d97 | 1008 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait); |
ba4e7d97 TH |
1009 | out_unlock: |
1010 | if (ret && mem.mm_node) { | |
a987fcaa | 1011 | spin_lock(&glob->lru_lock); |
ca262a99 | 1012 | mem.mm_node->private = NULL; |
ba4e7d97 | 1013 | drm_mm_put_block(mem.mm_node); |
a987fcaa | 1014 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1015 | } |
1016 | return ret; | |
1017 | } | |
1018 | ||
ca262a99 | 1019 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1020 | struct ttm_mem_reg *mem) |
1021 | { | |
ca262a99 | 1022 | int i; |
e22238ea TH |
1023 | struct drm_mm_node *node = mem->mm_node; |
1024 | ||
1025 | if (node && placement->lpfn != 0 && | |
1026 | (node->start < placement->fpfn || | |
1027 | node->start + node->size > placement->lpfn)) | |
1028 | return -1; | |
ca262a99 JG |
1029 | |
1030 | for (i = 0; i < placement->num_placement; i++) { | |
1031 | if ((placement->placement[i] & mem->placement & | |
1032 | TTM_PL_MASK_CACHING) && | |
1033 | (placement->placement[i] & mem->placement & | |
1034 | TTM_PL_MASK_MEM)) | |
1035 | return i; | |
1036 | } | |
1037 | return -1; | |
ba4e7d97 TH |
1038 | } |
1039 | ||
09855acb JG |
1040 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1041 | struct ttm_placement *placement, | |
1042 | bool interruptible, bool no_wait) | |
ba4e7d97 TH |
1043 | { |
1044 | int ret; | |
1045 | ||
1046 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1047 | /* Check that range is valid */ |
1048 | if (placement->lpfn || placement->fpfn) | |
1049 | if (placement->fpfn > placement->lpfn || | |
1050 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1051 | return -EINVAL; | |
ba4e7d97 TH |
1052 | /* |
1053 | * Check whether we need to move buffer. | |
1054 | */ | |
ca262a99 JG |
1055 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1056 | if (ret < 0) { | |
1057 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait); | |
1058 | if (ret) | |
ba4e7d97 | 1059 | return ret; |
ca262a99 JG |
1060 | } else { |
1061 | /* | |
1062 | * Use the access and other non-mapping-related flag bits from | |
1063 | * the compatible memory placement flags to the active flags | |
1064 | */ | |
1065 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1066 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1067 | } |
ba4e7d97 TH |
1068 | /* |
1069 | * We might need to add a TTM. | |
1070 | */ | |
ba4e7d97 TH |
1071 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1072 | ret = ttm_bo_add_ttm(bo, true); | |
1073 | if (ret) | |
1074 | return ret; | |
1075 | } | |
ba4e7d97 TH |
1076 | return 0; |
1077 | } | |
09855acb | 1078 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1079 | |
09855acb JG |
1080 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1081 | struct ttm_placement *placement) | |
ba4e7d97 | 1082 | { |
09855acb | 1083 | int i; |
ba4e7d97 | 1084 | |
09855acb JG |
1085 | if (placement->fpfn || placement->lpfn) { |
1086 | if (bo->mem.num_pages > (placement->lpfn - placement->fpfn)) { | |
1087 | printk(KERN_ERR TTM_PFX "Page number range to small " | |
1088 | "Need %lu pages, range is [%u, %u]\n", | |
1089 | bo->mem.num_pages, placement->fpfn, | |
1090 | placement->lpfn); | |
ba4e7d97 TH |
1091 | return -EINVAL; |
1092 | } | |
09855acb JG |
1093 | } |
1094 | for (i = 0; i < placement->num_placement; i++) { | |
1095 | if (!capable(CAP_SYS_ADMIN)) { | |
1096 | if (placement->placement[i] & TTM_PL_FLAG_NO_EVICT) { | |
1097 | printk(KERN_ERR TTM_PFX "Need to be root to " | |
1098 | "modify NO_EVICT status.\n"); | |
1099 | return -EINVAL; | |
1100 | } | |
1101 | } | |
1102 | } | |
1103 | for (i = 0; i < placement->num_busy_placement; i++) { | |
1104 | if (!capable(CAP_SYS_ADMIN)) { | |
1105 | if (placement->busy_placement[i] & TTM_PL_FLAG_NO_EVICT) { | |
1106 | printk(KERN_ERR TTM_PFX "Need to be root to " | |
1107 | "modify NO_EVICT status.\n"); | |
1108 | return -EINVAL; | |
1109 | } | |
ba4e7d97 TH |
1110 | } |
1111 | } | |
1112 | return 0; | |
1113 | } | |
1114 | ||
09855acb JG |
1115 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1116 | struct ttm_buffer_object *bo, | |
1117 | unsigned long size, | |
1118 | enum ttm_bo_type type, | |
1119 | struct ttm_placement *placement, | |
1120 | uint32_t page_alignment, | |
1121 | unsigned long buffer_start, | |
1122 | bool interruptible, | |
1123 | struct file *persistant_swap_storage, | |
1124 | size_t acc_size, | |
1125 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1126 | { |
09855acb | 1127 | int ret = 0; |
ba4e7d97 TH |
1128 | unsigned long num_pages; |
1129 | ||
1130 | size += buffer_start & ~PAGE_MASK; | |
1131 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1132 | if (num_pages == 0) { | |
1133 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
1134 | return -EINVAL; | |
1135 | } | |
1136 | bo->destroy = destroy; | |
1137 | ||
1138 | spin_lock_init(&bo->lock); | |
1139 | kref_init(&bo->kref); | |
1140 | kref_init(&bo->list_kref); | |
1141 | atomic_set(&bo->cpu_writers, 0); | |
1142 | atomic_set(&bo->reserved, 1); | |
1143 | init_waitqueue_head(&bo->event_queue); | |
1144 | INIT_LIST_HEAD(&bo->lru); | |
1145 | INIT_LIST_HEAD(&bo->ddestroy); | |
1146 | INIT_LIST_HEAD(&bo->swap); | |
1147 | bo->bdev = bdev; | |
a987fcaa | 1148 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1149 | bo->type = type; |
1150 | bo->num_pages = num_pages; | |
eb6d2c39 | 1151 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1152 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1153 | bo->mem.num_pages = bo->num_pages; | |
1154 | bo->mem.mm_node = NULL; | |
1155 | bo->mem.page_alignment = page_alignment; | |
1156 | bo->buffer_start = buffer_start & PAGE_MASK; | |
1157 | bo->priv_flags = 0; | |
1158 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1159 | bo->seq_valid = false; | |
1160 | bo->persistant_swap_storage = persistant_swap_storage; | |
1161 | bo->acc_size = acc_size; | |
a987fcaa | 1162 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1163 | |
09855acb | 1164 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1165 | if (unlikely(ret != 0)) |
1166 | goto out_err; | |
1167 | ||
ba4e7d97 TH |
1168 | /* |
1169 | * For ttm_bo_type_device buffers, allocate | |
1170 | * address space from the device. | |
1171 | */ | |
ba4e7d97 TH |
1172 | if (bo->type == ttm_bo_type_device) { |
1173 | ret = ttm_bo_setup_vm(bo); | |
1174 | if (ret) | |
1175 | goto out_err; | |
1176 | } | |
1177 | ||
09855acb | 1178 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
ba4e7d97 TH |
1179 | if (ret) |
1180 | goto out_err; | |
1181 | ||
1182 | ttm_bo_unreserve(bo); | |
1183 | return 0; | |
1184 | ||
1185 | out_err: | |
1186 | ttm_bo_unreserve(bo); | |
1187 | ttm_bo_unref(&bo); | |
1188 | ||
1189 | return ret; | |
1190 | } | |
09855acb | 1191 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1192 | |
a987fcaa | 1193 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1194 | unsigned long num_pages) |
1195 | { | |
1196 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1197 | PAGE_MASK; | |
1198 | ||
a987fcaa | 1199 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1200 | } |
1201 | ||
09855acb JG |
1202 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1203 | unsigned long size, | |
1204 | enum ttm_bo_type type, | |
1205 | struct ttm_placement *placement, | |
1206 | uint32_t page_alignment, | |
1207 | unsigned long buffer_start, | |
1208 | bool interruptible, | |
1209 | struct file *persistant_swap_storage, | |
1210 | struct ttm_buffer_object **p_bo) | |
ba4e7d97 TH |
1211 | { |
1212 | struct ttm_buffer_object *bo; | |
a987fcaa | 1213 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1214 | int ret; |
ba4e7d97 TH |
1215 | |
1216 | size_t acc_size = | |
a987fcaa | 1217 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1218 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1219 | if (unlikely(ret != 0)) |
1220 | return ret; | |
1221 | ||
1222 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1223 | ||
1224 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1225 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1226 | return -ENOMEM; |
1227 | } | |
1228 | ||
09855acb JG |
1229 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1230 | buffer_start, interruptible, | |
1231 | persistant_swap_storage, acc_size, NULL); | |
ba4e7d97 TH |
1232 | if (likely(ret == 0)) |
1233 | *p_bo = bo; | |
1234 | ||
1235 | return ret; | |
1236 | } | |
1237 | ||
ba4e7d97 | 1238 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1239 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1240 | { |
ca262a99 | 1241 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1242 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1243 | int ret; |
ba4e7d97 TH |
1244 | |
1245 | /* | |
1246 | * Can't use standard list traversal since we're unlocking. | |
1247 | */ | |
1248 | ||
a987fcaa | 1249 | spin_lock(&glob->lru_lock); |
ca262a99 | 1250 | while (!list_empty(&man->lru)) { |
a987fcaa | 1251 | spin_unlock(&glob->lru_lock); |
ca262a99 JG |
1252 | ret = ttm_mem_evict_first(bdev, mem_type, false, false); |
1253 | if (ret) { | |
1254 | if (allow_errors) { | |
1255 | return ret; | |
1256 | } else { | |
1257 | printk(KERN_ERR TTM_PFX | |
1258 | "Cleanup eviction failed\n"); | |
1259 | } | |
1260 | } | |
a987fcaa | 1261 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1262 | } |
a987fcaa | 1263 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1264 | return 0; |
1265 | } | |
1266 | ||
1267 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1268 | { | |
a987fcaa | 1269 | struct ttm_bo_global *glob = bdev->glob; |
c96e7c7a | 1270 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1271 | int ret = -EINVAL; |
1272 | ||
1273 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1274 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1275 | return ret; | |
1276 | } | |
c96e7c7a | 1277 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1278 | |
1279 | if (!man->has_type) { | |
1280 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1281 | "memory manager type %u\n", mem_type); | |
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | man->use_type = false; | |
1286 | man->has_type = false; | |
1287 | ||
1288 | ret = 0; | |
1289 | if (mem_type > 0) { | |
ca262a99 | 1290 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1291 | |
a987fcaa | 1292 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1293 | if (drm_mm_clean(&man->manager)) |
1294 | drm_mm_takedown(&man->manager); | |
1295 | else | |
1296 | ret = -EBUSY; | |
1297 | ||
a987fcaa | 1298 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1299 | } |
1300 | ||
1301 | return ret; | |
1302 | } | |
1303 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1304 | ||
1305 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1306 | { | |
1307 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1308 | ||
1309 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1310 | printk(KERN_ERR TTM_PFX | |
1311 | "Illegal memory manager memory type %u.\n", | |
1312 | mem_type); | |
1313 | return -EINVAL; | |
1314 | } | |
1315 | ||
1316 | if (!man->has_type) { | |
1317 | printk(KERN_ERR TTM_PFX | |
1318 | "Memory type %u has not been initialized.\n", | |
1319 | mem_type); | |
1320 | return 0; | |
1321 | } | |
1322 | ||
ca262a99 | 1323 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1324 | } |
1325 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1326 | ||
1327 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1328 | unsigned long p_size) |
ba4e7d97 TH |
1329 | { |
1330 | int ret = -EINVAL; | |
1331 | struct ttm_mem_type_manager *man; | |
1332 | ||
1333 | if (type >= TTM_NUM_MEM_TYPES) { | |
1334 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); | |
1335 | return ret; | |
1336 | } | |
1337 | ||
1338 | man = &bdev->man[type]; | |
1339 | if (man->has_type) { | |
1340 | printk(KERN_ERR TTM_PFX | |
1341 | "Memory manager already initialized for type %d\n", | |
1342 | type); | |
1343 | return ret; | |
1344 | } | |
1345 | ||
1346 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1347 | if (ret) | |
1348 | return ret; | |
1349 | ||
1350 | ret = 0; | |
1351 | if (type != TTM_PL_SYSTEM) { | |
1352 | if (!p_size) { | |
1353 | printk(KERN_ERR TTM_PFX | |
1354 | "Zero size memory manager type %d\n", | |
1355 | type); | |
1356 | return ret; | |
1357 | } | |
ca262a99 | 1358 | ret = drm_mm_init(&man->manager, 0, p_size); |
ba4e7d97 TH |
1359 | if (ret) |
1360 | return ret; | |
1361 | } | |
1362 | man->has_type = true; | |
1363 | man->use_type = true; | |
1364 | man->size = p_size; | |
1365 | ||
1366 | INIT_LIST_HEAD(&man->lru); | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1371 | ||
a987fcaa TH |
1372 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1373 | { | |
1374 | struct ttm_bo_global *glob = | |
1375 | container_of(kobj, struct ttm_bo_global, kobj); | |
1376 | ||
a987fcaa TH |
1377 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1378 | __free_page(glob->dummy_read_page); | |
1379 | kfree(glob); | |
1380 | } | |
1381 | ||
1382 | void ttm_bo_global_release(struct ttm_global_reference *ref) | |
1383 | { | |
1384 | struct ttm_bo_global *glob = ref->object; | |
1385 | ||
1386 | kobject_del(&glob->kobj); | |
1387 | kobject_put(&glob->kobj); | |
1388 | } | |
1389 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1390 | ||
1391 | int ttm_bo_global_init(struct ttm_global_reference *ref) | |
1392 | { | |
1393 | struct ttm_bo_global_ref *bo_ref = | |
1394 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1395 | struct ttm_bo_global *glob = ref->object; | |
1396 | int ret; | |
1397 | ||
1398 | mutex_init(&glob->device_list_mutex); | |
1399 | spin_lock_init(&glob->lru_lock); | |
1400 | glob->mem_glob = bo_ref->mem_glob; | |
1401 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1402 | ||
1403 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1404 | ret = -ENOMEM; | |
1405 | goto out_no_drp; | |
1406 | } | |
1407 | ||
1408 | INIT_LIST_HEAD(&glob->swap_lru); | |
1409 | INIT_LIST_HEAD(&glob->device_list); | |
1410 | ||
1411 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1412 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1413 | if (unlikely(ret != 0)) { | |
1414 | printk(KERN_ERR TTM_PFX | |
1415 | "Could not register buffer object swapout.\n"); | |
1416 | goto out_no_shrink; | |
1417 | } | |
1418 | ||
1419 | glob->ttm_bo_extra_size = | |
1420 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1421 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1422 | ||
1423 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1424 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1425 | ||
1426 | atomic_set(&glob->bo_count, 0); | |
1427 | ||
b642ed06 RD |
1428 | ret = kobject_init_and_add( |
1429 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1430 | if (unlikely(ret != 0)) |
1431 | kobject_put(&glob->kobj); | |
1432 | return ret; | |
1433 | out_no_shrink: | |
1434 | __free_page(glob->dummy_read_page); | |
1435 | out_no_drp: | |
1436 | kfree(glob); | |
1437 | return ret; | |
1438 | } | |
1439 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1440 | ||
1441 | ||
ba4e7d97 TH |
1442 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1443 | { | |
1444 | int ret = 0; | |
1445 | unsigned i = TTM_NUM_MEM_TYPES; | |
1446 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1447 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1448 | |
1449 | while (i--) { | |
1450 | man = &bdev->man[i]; | |
1451 | if (man->has_type) { | |
1452 | man->use_type = false; | |
1453 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1454 | ret = -EBUSY; | |
1455 | printk(KERN_ERR TTM_PFX | |
1456 | "DRM memory manager type %d " | |
1457 | "is not clean.\n", i); | |
1458 | } | |
1459 | man->has_type = false; | |
1460 | } | |
1461 | } | |
1462 | ||
a987fcaa TH |
1463 | mutex_lock(&glob->device_list_mutex); |
1464 | list_del(&bdev->device_list); | |
1465 | mutex_unlock(&glob->device_list_mutex); | |
1466 | ||
ba4e7d97 TH |
1467 | if (!cancel_delayed_work(&bdev->wq)) |
1468 | flush_scheduled_work(); | |
1469 | ||
1470 | while (ttm_bo_delayed_delete(bdev, true)) | |
1471 | ; | |
1472 | ||
a987fcaa | 1473 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1474 | if (list_empty(&bdev->ddestroy)) |
1475 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1476 | ||
1477 | if (list_empty(&bdev->man[0].lru)) | |
1478 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1479 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1480 | |
ba4e7d97 TH |
1481 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1482 | write_lock(&bdev->vm_lock); | |
1483 | drm_mm_takedown(&bdev->addr_space_mm); | |
1484 | write_unlock(&bdev->vm_lock); | |
1485 | ||
ba4e7d97 TH |
1486 | return ret; |
1487 | } | |
1488 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1489 | ||
ba4e7d97 | 1490 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1491 | struct ttm_bo_global *glob, |
1492 | struct ttm_bo_driver *driver, | |
51c8b407 | 1493 | uint64_t file_page_offset, |
ad49f501 | 1494 | bool need_dma32) |
ba4e7d97 TH |
1495 | { |
1496 | int ret = -EINVAL; | |
1497 | ||
ba4e7d97 | 1498 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1499 | bdev->driver = driver; |
ba4e7d97 TH |
1500 | |
1501 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1502 | ||
ba4e7d97 TH |
1503 | /* |
1504 | * Initialize the system memory buffer type. | |
1505 | * Other types need to be driver / IOCTL initialized. | |
1506 | */ | |
ca262a99 | 1507 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1508 | if (unlikely(ret != 0)) |
a987fcaa | 1509 | goto out_no_sys; |
ba4e7d97 TH |
1510 | |
1511 | bdev->addr_space_rb = RB_ROOT; | |
1512 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1513 | if (unlikely(ret != 0)) | |
a987fcaa | 1514 | goto out_no_addr_mm; |
ba4e7d97 TH |
1515 | |
1516 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1517 | bdev->nice_mode = true; | |
1518 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1519 | bdev->dev_mapping = NULL; |
a987fcaa | 1520 | bdev->glob = glob; |
ad49f501 | 1521 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1522 | |
a987fcaa TH |
1523 | mutex_lock(&glob->device_list_mutex); |
1524 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1525 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1526 | |
1527 | return 0; | |
a987fcaa | 1528 | out_no_addr_mm: |
ba4e7d97 | 1529 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1530 | out_no_sys: |
ba4e7d97 TH |
1531 | return ret; |
1532 | } | |
1533 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1534 | ||
1535 | /* | |
1536 | * buffer object vm functions. | |
1537 | */ | |
1538 | ||
1539 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1540 | { | |
1541 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1542 | ||
1543 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1544 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1545 | return false; | |
1546 | ||
1547 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1548 | return false; | |
1549 | ||
1550 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1551 | return false; | |
1552 | } | |
1553 | return true; | |
1554 | } | |
1555 | ||
1556 | int ttm_bo_pci_offset(struct ttm_bo_device *bdev, | |
1557 | struct ttm_mem_reg *mem, | |
1558 | unsigned long *bus_base, | |
1559 | unsigned long *bus_offset, unsigned long *bus_size) | |
1560 | { | |
1561 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1562 | ||
1563 | *bus_size = 0; | |
1564 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
1565 | return -EINVAL; | |
1566 | ||
1567 | if (ttm_mem_reg_is_pci(bdev, mem)) { | |
1568 | *bus_offset = mem->mm_node->start << PAGE_SHIFT; | |
1569 | *bus_size = mem->num_pages << PAGE_SHIFT; | |
1570 | *bus_base = man->io_offset; | |
1571 | } | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1577 | { | |
1578 | struct ttm_bo_device *bdev = bo->bdev; | |
1579 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1580 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1581 | ||
1582 | if (!bdev->dev_mapping) | |
1583 | return; | |
1584 | ||
1585 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); | |
1586 | } | |
e024e110 | 1587 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1588 | |
1589 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1590 | { | |
1591 | struct ttm_bo_device *bdev = bo->bdev; | |
1592 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1593 | struct rb_node *parent = NULL; | |
1594 | struct ttm_buffer_object *cur_bo; | |
1595 | unsigned long offset = bo->vm_node->start; | |
1596 | unsigned long cur_offset; | |
1597 | ||
1598 | while (*cur) { | |
1599 | parent = *cur; | |
1600 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1601 | cur_offset = cur_bo->vm_node->start; | |
1602 | if (offset < cur_offset) | |
1603 | cur = &parent->rb_left; | |
1604 | else if (offset > cur_offset) | |
1605 | cur = &parent->rb_right; | |
1606 | else | |
1607 | BUG(); | |
1608 | } | |
1609 | ||
1610 | rb_link_node(&bo->vm_rb, parent, cur); | |
1611 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1612 | } | |
1613 | ||
1614 | /** | |
1615 | * ttm_bo_setup_vm: | |
1616 | * | |
1617 | * @bo: the buffer to allocate address space for | |
1618 | * | |
1619 | * Allocate address space in the drm device so that applications | |
1620 | * can mmap the buffer and access the contents. This only | |
1621 | * applies to ttm_bo_type_device objects as others are not | |
1622 | * placed in the drm device address space. | |
1623 | */ | |
1624 | ||
1625 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1626 | { | |
1627 | struct ttm_bo_device *bdev = bo->bdev; | |
1628 | int ret; | |
1629 | ||
1630 | retry_pre_get: | |
1631 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1632 | if (unlikely(ret != 0)) | |
1633 | return ret; | |
1634 | ||
1635 | write_lock(&bdev->vm_lock); | |
1636 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1637 | bo->mem.num_pages, 0, 0); | |
1638 | ||
1639 | if (unlikely(bo->vm_node == NULL)) { | |
1640 | ret = -ENOMEM; | |
1641 | goto out_unlock; | |
1642 | } | |
1643 | ||
1644 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1645 | bo->mem.num_pages, 0); | |
1646 | ||
1647 | if (unlikely(bo->vm_node == NULL)) { | |
1648 | write_unlock(&bdev->vm_lock); | |
1649 | goto retry_pre_get; | |
1650 | } | |
1651 | ||
1652 | ttm_bo_vm_insert_rb(bo); | |
1653 | write_unlock(&bdev->vm_lock); | |
1654 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1655 | ||
1656 | return 0; | |
1657 | out_unlock: | |
1658 | write_unlock(&bdev->vm_lock); | |
1659 | return ret; | |
1660 | } | |
1661 | ||
1662 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1663 | bool lazy, bool interruptible, bool no_wait) | |
1664 | { | |
1665 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1666 | void *sync_obj; | |
1667 | void *sync_obj_arg; | |
1668 | int ret = 0; | |
1669 | ||
1670 | if (likely(bo->sync_obj == NULL)) | |
1671 | return 0; | |
1672 | ||
1673 | while (bo->sync_obj) { | |
1674 | ||
1675 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1676 | void *tmp_obj = bo->sync_obj; | |
1677 | bo->sync_obj = NULL; | |
1678 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1679 | spin_unlock(&bo->lock); | |
1680 | driver->sync_obj_unref(&tmp_obj); | |
1681 | spin_lock(&bo->lock); | |
1682 | continue; | |
1683 | } | |
1684 | ||
1685 | if (no_wait) | |
1686 | return -EBUSY; | |
1687 | ||
1688 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1689 | sync_obj_arg = bo->sync_obj_arg; | |
1690 | spin_unlock(&bo->lock); | |
1691 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1692 | lazy, interruptible); | |
1693 | if (unlikely(ret != 0)) { | |
1694 | driver->sync_obj_unref(&sync_obj); | |
1695 | spin_lock(&bo->lock); | |
1696 | return ret; | |
1697 | } | |
1698 | spin_lock(&bo->lock); | |
1699 | if (likely(bo->sync_obj == sync_obj && | |
1700 | bo->sync_obj_arg == sync_obj_arg)) { | |
1701 | void *tmp_obj = bo->sync_obj; | |
1702 | bo->sync_obj = NULL; | |
1703 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1704 | &bo->priv_flags); | |
1705 | spin_unlock(&bo->lock); | |
1706 | driver->sync_obj_unref(&sync_obj); | |
1707 | driver->sync_obj_unref(&tmp_obj); | |
1708 | spin_lock(&bo->lock); | |
fee280d3 TH |
1709 | } else { |
1710 | spin_unlock(&bo->lock); | |
1711 | driver->sync_obj_unref(&sync_obj); | |
1712 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1713 | } |
1714 | } | |
1715 | return 0; | |
1716 | } | |
1717 | EXPORT_SYMBOL(ttm_bo_wait); | |
1718 | ||
1719 | void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo) | |
1720 | { | |
1721 | atomic_set(&bo->reserved, 0); | |
1722 | wake_up_all(&bo->event_queue); | |
1723 | } | |
1724 | ||
1725 | int ttm_bo_block_reservation(struct ttm_buffer_object *bo, bool interruptible, | |
1726 | bool no_wait) | |
1727 | { | |
1728 | int ret; | |
1729 | ||
1730 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
1731 | if (no_wait) | |
1732 | return -EBUSY; | |
1733 | else if (interruptible) { | |
1734 | ret = wait_event_interruptible | |
1735 | (bo->event_queue, atomic_read(&bo->reserved) == 0); | |
1736 | if (unlikely(ret != 0)) | |
98ffc415 | 1737 | return ret; |
ba4e7d97 TH |
1738 | } else { |
1739 | wait_event(bo->event_queue, | |
1740 | atomic_read(&bo->reserved) == 0); | |
1741 | } | |
1742 | } | |
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) | |
1747 | { | |
1748 | int ret = 0; | |
1749 | ||
1750 | /* | |
1751 | * Using ttm_bo_reserve instead of ttm_bo_block_reservation | |
1752 | * makes sure the lru lists are updated. | |
1753 | */ | |
1754 | ||
1755 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1756 | if (unlikely(ret != 0)) | |
1757 | return ret; | |
1758 | spin_lock(&bo->lock); | |
1759 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1760 | spin_unlock(&bo->lock); | |
1761 | if (likely(ret == 0)) | |
1762 | atomic_inc(&bo->cpu_writers); | |
1763 | ttm_bo_unreserve(bo); | |
1764 | return ret; | |
1765 | } | |
d1ede145 | 1766 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1767 | |
1768 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1769 | { | |
1770 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1771 | wake_up_all(&bo->event_queue); | |
1772 | } | |
d1ede145 | 1773 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1774 | |
1775 | /** | |
1776 | * A buffer object shrink method that tries to swap out the first | |
1777 | * buffer object on the bo_global::swap_lru list. | |
1778 | */ | |
1779 | ||
1780 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1781 | { | |
a987fcaa TH |
1782 | struct ttm_bo_global *glob = |
1783 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1784 | struct ttm_buffer_object *bo; |
1785 | int ret = -EBUSY; | |
1786 | int put_count; | |
1787 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1788 | ||
a987fcaa | 1789 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1790 | while (ret == -EBUSY) { |
a987fcaa TH |
1791 | if (unlikely(list_empty(&glob->swap_lru))) { |
1792 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1793 | return -EBUSY; |
1794 | } | |
1795 | ||
a987fcaa | 1796 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1797 | struct ttm_buffer_object, swap); |
1798 | kref_get(&bo->list_kref); | |
1799 | ||
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, | |
1842 | false, false); | |
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); |