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ba4e7d97 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | /* | |
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
29 | */ | |
30 | ||
31 | #include "ttm/ttm_module.h" | |
32 | #include "ttm/ttm_bo_driver.h" | |
33 | #include "ttm/ttm_placement.h" | |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/file.h> | |
39 | #include <linux/module.h> | |
06fba6d4 | 40 | #include <asm/atomic.h> |
ba4e7d97 TH |
41 | |
42 | #define TTM_ASSERT_LOCKED(param) | |
43 | #define TTM_DEBUG(fmt, arg...) | |
44 | #define TTM_BO_HASH_ORDER 13 | |
45 | ||
46 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo); | |
ba4e7d97 | 47 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink); |
a987fcaa TH |
48 | static void ttm_bo_global_kobj_release(struct kobject *kobj); |
49 | ||
50 | static struct attribute ttm_bo_count = { | |
51 | .name = "bo_count", | |
52 | .mode = S_IRUGO | |
53 | }; | |
54 | ||
fb53f862 JG |
55 | static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type) |
56 | { | |
57 | int i; | |
58 | ||
59 | for (i = 0; i <= TTM_PL_PRIV5; i++) | |
60 | if (flags & (1 << i)) { | |
61 | *mem_type = i; | |
62 | return 0; | |
63 | } | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
5012f506 | 67 | static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
fb53f862 | 68 | { |
5012f506 JG |
69 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
70 | ||
fb53f862 JG |
71 | printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type); |
72 | printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type); | |
73 | printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags); | |
74 | printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset); | |
eb6d2c39 | 75 | printk(KERN_ERR TTM_PFX " size: %llu\n", man->size); |
fb53f862 JG |
76 | printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n", |
77 | man->available_caching); | |
78 | printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n", | |
79 | man->default_caching); | |
d961db75 BS |
80 | if (mem_type != TTM_PL_SYSTEM) |
81 | (*man->func->debug)(man, TTM_PFX); | |
fb53f862 JG |
82 | } |
83 | ||
84 | static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, | |
85 | struct ttm_placement *placement) | |
86 | { | |
fb53f862 JG |
87 | int i, ret, mem_type; |
88 | ||
eb6d2c39 | 89 | printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n", |
fb53f862 JG |
90 | bo, bo->mem.num_pages, bo->mem.size >> 10, |
91 | bo->mem.size >> 20); | |
92 | for (i = 0; i < placement->num_placement; i++) { | |
93 | ret = ttm_mem_type_from_flags(placement->placement[i], | |
94 | &mem_type); | |
95 | if (ret) | |
96 | return; | |
fb53f862 JG |
97 | printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n", |
98 | i, placement->placement[i], mem_type); | |
5012f506 | 99 | ttm_mem_type_debug(bo->bdev, mem_type); |
fb53f862 JG |
100 | } |
101 | } | |
102 | ||
a987fcaa TH |
103 | static ssize_t ttm_bo_global_show(struct kobject *kobj, |
104 | struct attribute *attr, | |
105 | char *buffer) | |
106 | { | |
107 | struct ttm_bo_global *glob = | |
108 | container_of(kobj, struct ttm_bo_global, kobj); | |
109 | ||
110 | return snprintf(buffer, PAGE_SIZE, "%lu\n", | |
111 | (unsigned long) atomic_read(&glob->bo_count)); | |
112 | } | |
113 | ||
114 | static struct attribute *ttm_bo_global_attrs[] = { | |
115 | &ttm_bo_count, | |
116 | NULL | |
117 | }; | |
118 | ||
52cf25d0 | 119 | static const struct sysfs_ops ttm_bo_global_ops = { |
a987fcaa TH |
120 | .show = &ttm_bo_global_show |
121 | }; | |
122 | ||
123 | static struct kobj_type ttm_bo_glob_kobj_type = { | |
124 | .release = &ttm_bo_global_kobj_release, | |
125 | .sysfs_ops = &ttm_bo_global_ops, | |
126 | .default_attrs = ttm_bo_global_attrs | |
127 | }; | |
128 | ||
ba4e7d97 TH |
129 | |
130 | static inline uint32_t ttm_bo_type_flags(unsigned type) | |
131 | { | |
132 | return 1 << (type); | |
133 | } | |
134 | ||
135 | static void ttm_bo_release_list(struct kref *list_kref) | |
136 | { | |
137 | struct ttm_buffer_object *bo = | |
138 | container_of(list_kref, struct ttm_buffer_object, list_kref); | |
139 | struct ttm_bo_device *bdev = bo->bdev; | |
140 | ||
141 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
142 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
143 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
144 | BUG_ON(bo->sync_obj != NULL); | |
145 | BUG_ON(bo->mem.mm_node != NULL); | |
146 | BUG_ON(!list_empty(&bo->lru)); | |
147 | BUG_ON(!list_empty(&bo->ddestroy)); | |
148 | ||
149 | if (bo->ttm) | |
150 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 151 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
152 | if (bo->destroy) |
153 | bo->destroy(bo); | |
154 | else { | |
a987fcaa | 155 | ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size); |
ba4e7d97 TH |
156 | kfree(bo); |
157 | } | |
158 | } | |
159 | ||
160 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
161 | { | |
ba4e7d97 | 162 | if (interruptible) { |
965d3807 | 163 | return wait_event_interruptible(bo->event_queue, |
ba4e7d97 | 164 | atomic_read(&bo->reserved) == 0); |
ba4e7d97 TH |
165 | } else { |
166 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
965d3807 | 167 | return 0; |
ba4e7d97 | 168 | } |
ba4e7d97 | 169 | } |
d1ede145 | 170 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 TH |
171 | |
172 | static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) | |
173 | { | |
174 | struct ttm_bo_device *bdev = bo->bdev; | |
175 | struct ttm_mem_type_manager *man; | |
176 | ||
177 | BUG_ON(!atomic_read(&bo->reserved)); | |
178 | ||
179 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
180 | ||
181 | BUG_ON(!list_empty(&bo->lru)); | |
182 | ||
183 | man = &bdev->man[bo->mem.mem_type]; | |
184 | list_add_tail(&bo->lru, &man->lru); | |
185 | kref_get(&bo->list_kref); | |
186 | ||
187 | if (bo->ttm != NULL) { | |
a987fcaa | 188 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
189 | kref_get(&bo->list_kref); |
190 | } | |
191 | } | |
192 | } | |
193 | ||
194 | /** | |
195 | * Call with the lru_lock held. | |
196 | */ | |
197 | ||
198 | static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) | |
199 | { | |
200 | int put_count = 0; | |
201 | ||
202 | if (!list_empty(&bo->swap)) { | |
203 | list_del_init(&bo->swap); | |
204 | ++put_count; | |
205 | } | |
206 | if (!list_empty(&bo->lru)) { | |
207 | list_del_init(&bo->lru); | |
208 | ++put_count; | |
209 | } | |
210 | ||
211 | /* | |
212 | * TODO: Add a driver hook to delete from | |
213 | * driver-specific LRU's here. | |
214 | */ | |
215 | ||
216 | return put_count; | |
217 | } | |
218 | ||
219 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
220 | bool interruptible, | |
221 | bool no_wait, bool use_sequence, uint32_t sequence) | |
222 | { | |
a987fcaa | 223 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
224 | int ret; |
225 | ||
226 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
95ccb0f3 TH |
227 | /** |
228 | * Deadlock avoidance for multi-bo reserving. | |
229 | */ | |
ba4e7d97 TH |
230 | if (use_sequence && bo->seq_valid && |
231 | (sequence - bo->val_seq < (1 << 31))) { | |
232 | return -EAGAIN; | |
233 | } | |
234 | ||
235 | if (no_wait) | |
236 | return -EBUSY; | |
237 | ||
a987fcaa | 238 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 239 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 240 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
241 | |
242 | if (unlikely(ret)) | |
243 | return ret; | |
244 | } | |
245 | ||
246 | if (use_sequence) { | |
95ccb0f3 TH |
247 | /** |
248 | * Wake up waiters that may need to recheck for deadlock, | |
249 | * if we decreased the sequence number. | |
250 | */ | |
251 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
252 | || !bo->seq_valid)) | |
253 | wake_up_all(&bo->event_queue); | |
254 | ||
ba4e7d97 TH |
255 | bo->val_seq = sequence; |
256 | bo->seq_valid = true; | |
257 | } else { | |
258 | bo->seq_valid = false; | |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
263 | EXPORT_SYMBOL(ttm_bo_reserve); | |
264 | ||
265 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
266 | { | |
267 | BUG(); | |
268 | } | |
269 | ||
270 | int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
271 | bool interruptible, | |
272 | bool no_wait, bool use_sequence, uint32_t sequence) | |
273 | { | |
a987fcaa | 274 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
275 | int put_count = 0; |
276 | int ret; | |
277 | ||
a987fcaa | 278 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
279 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
280 | sequence); | |
281 | if (likely(ret == 0)) | |
282 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 283 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
284 | |
285 | while (put_count--) | |
286 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
287 | ||
288 | return ret; | |
289 | } | |
290 | ||
291 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
292 | { | |
a987fcaa | 293 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 294 | |
a987fcaa | 295 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
296 | ttm_bo_add_to_lru(bo); |
297 | atomic_set(&bo->reserved, 0); | |
298 | wake_up_all(&bo->event_queue); | |
a987fcaa | 299 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
300 | } |
301 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
302 | ||
303 | /* | |
304 | * Call bo->mutex locked. | |
305 | */ | |
ba4e7d97 TH |
306 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
307 | { | |
308 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 309 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
310 | int ret = 0; |
311 | uint32_t page_flags = 0; | |
312 | ||
313 | TTM_ASSERT_LOCKED(&bo->mutex); | |
314 | bo->ttm = NULL; | |
315 | ||
ad49f501 DA |
316 | if (bdev->need_dma32) |
317 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
318 | ||
ba4e7d97 TH |
319 | switch (bo->type) { |
320 | case ttm_bo_type_device: | |
321 | if (zero_alloc) | |
322 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
323 | case ttm_bo_type_kernel: | |
324 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 325 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
326 | if (unlikely(bo->ttm == NULL)) |
327 | ret = -ENOMEM; | |
328 | break; | |
329 | case ttm_bo_type_user: | |
330 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
331 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 332 | glob->dummy_read_page); |
447aeb90 | 333 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 334 | ret = -ENOMEM; |
447aeb90 DA |
335 | break; |
336 | } | |
ba4e7d97 TH |
337 | |
338 | ret = ttm_tt_set_user(bo->ttm, current, | |
339 | bo->buffer_start, bo->num_pages); | |
340 | if (unlikely(ret != 0)) | |
341 | ttm_tt_destroy(bo->ttm); | |
342 | break; | |
343 | default: | |
344 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
345 | ret = -EINVAL; | |
346 | break; | |
347 | } | |
348 | ||
349 | return ret; | |
350 | } | |
351 | ||
352 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
353 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
354 | bool evict, bool interruptible, |
355 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
356 | { |
357 | struct ttm_bo_device *bdev = bo->bdev; | |
358 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
359 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
360 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
361 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
362 | int ret = 0; | |
363 | ||
364 | if (old_is_pci || new_is_pci || | |
365 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
366 | ttm_bo_unmap_virtual(bo); | |
367 | ||
368 | /* | |
369 | * Create and bind a ttm if required. | |
370 | */ | |
371 | ||
372 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
373 | ret = ttm_bo_add_ttm(bo, false); | |
374 | if (ret) | |
375 | goto out_err; | |
376 | ||
377 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
378 | if (ret) | |
87ef9209 | 379 | goto out_err; |
ba4e7d97 TH |
380 | |
381 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
382 | ret = ttm_tt_bind(bo->ttm, mem); | |
383 | if (ret) | |
384 | goto out_err; | |
385 | } | |
386 | ||
387 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 388 | bo->mem = *mem; |
ba4e7d97 | 389 | mem->mm_node = NULL; |
ba4e7d97 TH |
390 | goto moved; |
391 | } | |
392 | ||
393 | } | |
394 | ||
e024e110 DA |
395 | if (bdev->driver->move_notify) |
396 | bdev->driver->move_notify(bo, mem); | |
397 | ||
ba4e7d97 TH |
398 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
399 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 400 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
401 | else if (bdev->driver->move) |
402 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 403 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 404 | else |
9d87fa21 | 405 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
406 | |
407 | if (ret) | |
408 | goto out_err; | |
409 | ||
410 | moved: | |
411 | if (bo->evicted) { | |
412 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
413 | if (ret) | |
414 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
415 | bo->evicted = false; | |
416 | } | |
417 | ||
418 | if (bo->mem.mm_node) { | |
419 | spin_lock(&bo->lock); | |
d961db75 | 420 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
421 | bdev->man[bo->mem.mem_type].gpu_offset; |
422 | bo->cur_placement = bo->mem.placement; | |
423 | spin_unlock(&bo->lock); | |
354fb52c TH |
424 | } else |
425 | bo->offset = 0; | |
ba4e7d97 TH |
426 | |
427 | return 0; | |
428 | ||
429 | out_err: | |
430 | new_man = &bdev->man[bo->mem.mem_type]; | |
431 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
432 | ttm_tt_unbind(bo->ttm); | |
433 | ttm_tt_destroy(bo->ttm); | |
434 | bo->ttm = NULL; | |
435 | } | |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
1df6a2eb | 440 | /** |
40d857bb | 441 | * Call bo::reserved. |
1df6a2eb | 442 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
443 | * This is the place to put in driver specific hooks to release |
444 | * driver private resources. | |
445 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
446 | */ |
447 | ||
448 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
449 | { | |
1df6a2eb | 450 | if (bo->ttm) { |
1df6a2eb TH |
451 | ttm_tt_unbind(bo->ttm); |
452 | ttm_tt_destroy(bo->ttm); | |
453 | bo->ttm = NULL; | |
1df6a2eb TH |
454 | } |
455 | ||
40d857bb | 456 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
457 | |
458 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
459 | |
460 | /* | |
461 | * Make processes trying to reserve really pick it up. | |
462 | */ | |
463 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 464 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
465 | } |
466 | ||
e1efc9b6 | 467 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
468 | { |
469 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 470 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 471 | struct ttm_bo_driver *driver; |
aa123268 | 472 | void *sync_obj = NULL; |
e1efc9b6 TH |
473 | void *sync_obj_arg; |
474 | int put_count; | |
ba4e7d97 TH |
475 | int ret; |
476 | ||
477 | spin_lock(&bo->lock); | |
e1efc9b6 | 478 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 479 | if (!bo->sync_obj) { |
ba4e7d97 | 480 | |
a987fcaa | 481 | spin_lock(&glob->lru_lock); |
aaa20736 | 482 | |
1df6a2eb | 483 | /** |
e1efc9b6 TH |
484 | * Lock inversion between bo::reserve and bo::lock here, |
485 | * but that's OK, since we're only trylocking. | |
1df6a2eb TH |
486 | */ |
487 | ||
e1efc9b6 | 488 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 489 | |
e1efc9b6 TH |
490 | if (unlikely(ret == -EBUSY)) |
491 | goto queue; | |
1df6a2eb | 492 | |
e1efc9b6 | 493 | spin_unlock(&bo->lock); |
1df6a2eb | 494 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 495 | |
40d857bb | 496 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 497 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 TH |
498 | |
499 | while (put_count--) | |
aaa20736 | 500 | kref_put(&bo->list_kref, ttm_bo_ref_bug); |
ba4e7d97 | 501 | |
e1efc9b6 TH |
502 | return; |
503 | } else { | |
504 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 505 | } |
e1efc9b6 | 506 | queue: |
e1efc9b6 | 507 | driver = bdev->driver; |
aa123268 TH |
508 | if (bo->sync_obj) |
509 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
510 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
511 | |
512 | kref_get(&bo->list_kref); | |
513 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
514 | spin_unlock(&glob->lru_lock); | |
515 | spin_unlock(&bo->lock); | |
516 | ||
aa123268 | 517 | if (sync_obj) { |
e1efc9b6 | 518 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
519 | driver->sync_obj_unref(&sync_obj); |
520 | } | |
e1efc9b6 TH |
521 | schedule_delayed_work(&bdev->wq, |
522 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
523 | } | |
524 | ||
525 | /** | |
526 | * function ttm_bo_cleanup_refs | |
527 | * If bo idle, remove from delayed- and lru lists, and unref. | |
528 | * If not idle, do nothing. | |
529 | * | |
530 | * @interruptible Any sleeps should occur interruptibly. | |
531 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
532 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
533 | */ | |
534 | ||
535 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
536 | bool interruptible, | |
537 | bool no_wait_reserve, | |
538 | bool no_wait_gpu) | |
539 | { | |
540 | struct ttm_bo_global *glob = bo->glob; | |
541 | int put_count; | |
542 | int ret = 0; | |
543 | ||
544 | retry: | |
545 | spin_lock(&bo->lock); | |
546 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); | |
547 | spin_unlock(&bo->lock); | |
548 | ||
549 | if (unlikely(ret != 0)) | |
550 | return ret; | |
551 | ||
a987fcaa | 552 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
553 | ret = ttm_bo_reserve_locked(bo, interruptible, |
554 | no_wait_reserve, false, 0); | |
ba4e7d97 | 555 | |
e1efc9b6 | 556 | if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) { |
a987fcaa | 557 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
558 | return ret; |
559 | } | |
ba4e7d97 | 560 | |
e1efc9b6 TH |
561 | /** |
562 | * We can re-check for sync object without taking | |
563 | * the bo::lock since setting the sync object requires | |
564 | * also bo::reserved. A busy object at this point may | |
565 | * be caused by another thread recently starting an accelerated | |
566 | * eviction. | |
567 | */ | |
ba4e7d97 | 568 | |
e1efc9b6 TH |
569 | if (unlikely(bo->sync_obj)) { |
570 | atomic_set(&bo->reserved, 0); | |
571 | wake_up_all(&bo->event_queue); | |
a987fcaa | 572 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 573 | goto retry; |
ba4e7d97 TH |
574 | } |
575 | ||
e1efc9b6 TH |
576 | put_count = ttm_bo_del_from_lru(bo); |
577 | list_del_init(&bo->ddestroy); | |
578 | ++put_count; | |
579 | ||
580 | spin_unlock(&glob->lru_lock); | |
581 | ttm_bo_cleanup_memtype_use(bo); | |
582 | ||
583 | while (put_count--) | |
584 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
585 | ||
586 | return 0; | |
ba4e7d97 TH |
587 | } |
588 | ||
589 | /** | |
590 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
591 | * encountered buffers. | |
592 | */ | |
593 | ||
594 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
595 | { | |
a987fcaa | 596 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
597 | struct ttm_buffer_object *entry = NULL; |
598 | int ret = 0; | |
ba4e7d97 | 599 | |
a987fcaa | 600 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
601 | if (list_empty(&bdev->ddestroy)) |
602 | goto out_unlock; | |
603 | ||
604 | entry = list_first_entry(&bdev->ddestroy, | |
605 | struct ttm_buffer_object, ddestroy); | |
606 | kref_get(&entry->list_kref); | |
607 | ||
608 | for (;;) { | |
609 | struct ttm_buffer_object *nentry = NULL; | |
610 | ||
611 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
612 | nentry = list_first_entry(&entry->ddestroy, | |
613 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
614 | kref_get(&nentry->list_kref); |
615 | } | |
ba4e7d97 | 616 | |
a987fcaa | 617 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
618 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
619 | !remove_all); | |
ba4e7d97 | 620 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
621 | entry = nentry; |
622 | ||
623 | if (ret || !entry) | |
624 | goto out; | |
ba4e7d97 | 625 | |
a987fcaa | 626 | spin_lock(&glob->lru_lock); |
1a961ce0 | 627 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
628 | break; |
629 | } | |
ba4e7d97 | 630 | |
1a961ce0 LB |
631 | out_unlock: |
632 | spin_unlock(&glob->lru_lock); | |
633 | out: | |
634 | if (entry) | |
635 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
636 | return ret; |
637 | } | |
638 | ||
639 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
640 | { | |
641 | struct ttm_bo_device *bdev = | |
642 | container_of(work, struct ttm_bo_device, wq.work); | |
643 | ||
644 | if (ttm_bo_delayed_delete(bdev, false)) { | |
645 | schedule_delayed_work(&bdev->wq, | |
646 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
647 | } | |
648 | } | |
649 | ||
650 | static void ttm_bo_release(struct kref *kref) | |
651 | { | |
652 | struct ttm_buffer_object *bo = | |
653 | container_of(kref, struct ttm_buffer_object, kref); | |
654 | struct ttm_bo_device *bdev = bo->bdev; | |
655 | ||
656 | if (likely(bo->vm_node != NULL)) { | |
657 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
658 | drm_mm_put_block(bo->vm_node); | |
659 | bo->vm_node = NULL; | |
660 | } | |
661 | write_unlock(&bdev->vm_lock); | |
e1efc9b6 | 662 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
663 | kref_put(&bo->list_kref, ttm_bo_release_list); |
664 | write_lock(&bdev->vm_lock); | |
665 | } | |
666 | ||
667 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
668 | { | |
669 | struct ttm_buffer_object *bo = *p_bo; | |
670 | struct ttm_bo_device *bdev = bo->bdev; | |
671 | ||
672 | *p_bo = NULL; | |
673 | write_lock(&bdev->vm_lock); | |
674 | kref_put(&bo->kref, ttm_bo_release); | |
675 | write_unlock(&bdev->vm_lock); | |
676 | } | |
677 | EXPORT_SYMBOL(ttm_bo_unref); | |
678 | ||
7c5ee536 MG |
679 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
680 | { | |
681 | return cancel_delayed_work_sync(&bdev->wq); | |
682 | } | |
683 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
684 | ||
685 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
686 | { | |
687 | if (resched) | |
688 | schedule_delayed_work(&bdev->wq, | |
689 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
690 | } | |
691 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
692 | ||
ca262a99 | 693 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 694 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 695 | { |
ba4e7d97 TH |
696 | struct ttm_bo_device *bdev = bo->bdev; |
697 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
698 | struct ttm_placement placement; |
699 | int ret = 0; | |
ba4e7d97 TH |
700 | |
701 | spin_lock(&bo->lock); | |
9d87fa21 | 702 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 TH |
703 | spin_unlock(&bo->lock); |
704 | ||
78ecf091 | 705 | if (unlikely(ret != 0)) { |
98ffc415 | 706 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
707 | printk(KERN_ERR TTM_PFX |
708 | "Failed to expire sync object before " | |
709 | "buffer eviction.\n"); | |
710 | } | |
ba4e7d97 TH |
711 | goto out; |
712 | } | |
713 | ||
714 | BUG_ON(!atomic_read(&bo->reserved)); | |
715 | ||
716 | evict_mem = bo->mem; | |
717 | evict_mem.mm_node = NULL; | |
82c5da6b | 718 | evict_mem.bus.io_reserved = false; |
ba4e7d97 | 719 | |
7cb7d1d7 JG |
720 | placement.fpfn = 0; |
721 | placement.lpfn = 0; | |
722 | placement.num_placement = 0; | |
723 | placement.num_busy_placement = 0; | |
ca262a99 JG |
724 | bdev->driver->evict_flags(bo, &placement); |
725 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 726 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 727 | if (ret) { |
fb53f862 | 728 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
729 | printk(KERN_ERR TTM_PFX |
730 | "Failed to find memory space for " | |
731 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
732 | ttm_bo_mem_space_debug(bo, &placement); |
733 | } | |
ba4e7d97 TH |
734 | goto out; |
735 | } | |
736 | ||
737 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 738 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 739 | if (ret) { |
98ffc415 | 740 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 741 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 742 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
743 | goto out; |
744 | } | |
ca262a99 JG |
745 | bo->evicted = true; |
746 | out: | |
747 | return ret; | |
748 | } | |
749 | ||
750 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
751 | uint32_t mem_type, | |
9d87fa21 JG |
752 | bool interruptible, bool no_wait_reserve, |
753 | bool no_wait_gpu) | |
ca262a99 JG |
754 | { |
755 | struct ttm_bo_global *glob = bdev->glob; | |
756 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
757 | struct ttm_buffer_object *bo; | |
758 | int ret, put_count = 0; | |
ba4e7d97 | 759 | |
9c51ba1d | 760 | retry: |
a987fcaa | 761 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
762 | if (list_empty(&man->lru)) { |
763 | spin_unlock(&glob->lru_lock); | |
764 | return -EBUSY; | |
765 | } | |
766 | ||
ca262a99 JG |
767 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
768 | kref_get(&bo->list_kref); | |
9c51ba1d | 769 | |
e1efc9b6 TH |
770 | if (!list_empty(&bo->ddestroy)) { |
771 | spin_unlock(&glob->lru_lock); | |
772 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
773 | no_wait_reserve, no_wait_gpu); | |
774 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
775 | ||
776 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
777 | return ret; | |
778 | ||
779 | goto retry; | |
780 | } | |
781 | ||
9d87fa21 | 782 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
783 | |
784 | if (unlikely(ret == -EBUSY)) { | |
785 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 786 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
787 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
788 | ||
789 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
790 | ||
791 | /** | |
792 | * We *need* to retry after releasing the lru lock. | |
793 | */ | |
794 | ||
795 | if (unlikely(ret != 0)) | |
796 | return ret; | |
797 | goto retry; | |
798 | } | |
799 | ||
800 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 801 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
802 | |
803 | BUG_ON(ret != 0); | |
804 | ||
ca262a99 JG |
805 | while (put_count--) |
806 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
9c51ba1d | 807 | |
9d87fa21 | 808 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 809 | ttm_bo_unreserve(bo); |
9c51ba1d | 810 | |
ca262a99 | 811 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
812 | return ret; |
813 | } | |
814 | ||
42311ff9 BS |
815 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
816 | { | |
d961db75 | 817 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 818 | |
d961db75 BS |
819 | if (mem->mm_node) |
820 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
821 | } |
822 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
823 | ||
ba4e7d97 TH |
824 | /** |
825 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
826 | * space, or we've evicted everything and there isn't enough space. | |
827 | */ | |
ca262a99 JG |
828 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
829 | uint32_t mem_type, | |
830 | struct ttm_placement *placement, | |
831 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
832 | bool interruptible, |
833 | bool no_wait_reserve, | |
834 | bool no_wait_gpu) | |
ba4e7d97 | 835 | { |
ca262a99 | 836 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 837 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
838 | int ret; |
839 | ||
ba4e7d97 | 840 | do { |
d961db75 | 841 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
842 | if (unlikely(ret != 0)) |
843 | return ret; | |
d961db75 | 844 | if (mem->mm_node) |
ba4e7d97 | 845 | break; |
ca262a99 | 846 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 847 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
848 | if (unlikely(ret != 0)) |
849 | return ret; | |
ba4e7d97 | 850 | } while (1); |
d961db75 | 851 | if (mem->mm_node == NULL) |
ba4e7d97 | 852 | return -ENOMEM; |
ba4e7d97 TH |
853 | mem->mem_type = mem_type; |
854 | return 0; | |
855 | } | |
856 | ||
ae3e8122 TH |
857 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
858 | uint32_t cur_placement, | |
859 | uint32_t proposed_placement) | |
860 | { | |
861 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
862 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
863 | ||
864 | /** | |
865 | * Keep current caching if possible. | |
866 | */ | |
867 | ||
868 | if ((cur_placement & caching) != 0) | |
869 | result |= (cur_placement & caching); | |
870 | else if ((man->default_caching & caching) != 0) | |
871 | result |= man->default_caching; | |
872 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
873 | result |= TTM_PL_FLAG_CACHED; | |
874 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
875 | result |= TTM_PL_FLAG_WC; | |
876 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
877 | result |= TTM_PL_FLAG_UNCACHED; | |
878 | ||
879 | return result; | |
880 | } | |
881 | ||
ba4e7d97 TH |
882 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
883 | bool disallow_fixed, | |
884 | uint32_t mem_type, | |
ae3e8122 TH |
885 | uint32_t proposed_placement, |
886 | uint32_t *masked_placement) | |
ba4e7d97 TH |
887 | { |
888 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
889 | ||
890 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
891 | return false; | |
892 | ||
ae3e8122 | 893 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
894 | return false; |
895 | ||
ae3e8122 | 896 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 897 | return false; |
ba4e7d97 | 898 | |
ae3e8122 TH |
899 | cur_flags |= (proposed_placement & man->available_caching); |
900 | ||
901 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
902 | return true; |
903 | } | |
904 | ||
905 | /** | |
906 | * Creates space for memory region @mem according to its type. | |
907 | * | |
908 | * This function first searches for free space in compatible memory types in | |
909 | * the priority order defined by the driver. If free space isn't found, then | |
910 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
911 | * space. | |
912 | */ | |
913 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
914 | struct ttm_placement *placement, |
915 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
916 | bool interruptible, bool no_wait_reserve, |
917 | bool no_wait_gpu) | |
ba4e7d97 TH |
918 | { |
919 | struct ttm_bo_device *bdev = bo->bdev; | |
920 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
921 | uint32_t mem_type = TTM_PL_SYSTEM; |
922 | uint32_t cur_flags = 0; | |
923 | bool type_found = false; | |
924 | bool type_ok = false; | |
98ffc415 | 925 | bool has_erestartsys = false; |
ca262a99 | 926 | int i, ret; |
ba4e7d97 TH |
927 | |
928 | mem->mm_node = NULL; | |
b6637526 | 929 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
930 | ret = ttm_mem_type_from_flags(placement->placement[i], |
931 | &mem_type); | |
932 | if (ret) | |
933 | return ret; | |
ba4e7d97 TH |
934 | man = &bdev->man[mem_type]; |
935 | ||
936 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
937 | bo->type == ttm_bo_type_user, |
938 | mem_type, | |
939 | placement->placement[i], | |
940 | &cur_flags); | |
ba4e7d97 TH |
941 | |
942 | if (!type_ok) | |
943 | continue; | |
944 | ||
ae3e8122 TH |
945 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
946 | cur_flags); | |
ca262a99 JG |
947 | /* |
948 | * Use the access and other non-mapping-related flag bits from | |
949 | * the memory placement flags to the current flags | |
950 | */ | |
951 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
952 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 953 | |
ba4e7d97 TH |
954 | if (mem_type == TTM_PL_SYSTEM) |
955 | break; | |
956 | ||
957 | if (man->has_type && man->use_type) { | |
958 | type_found = true; | |
d961db75 | 959 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
960 | if (unlikely(ret)) |
961 | return ret; | |
ba4e7d97 | 962 | } |
d961db75 | 963 | if (mem->mm_node) |
ba4e7d97 TH |
964 | break; |
965 | } | |
966 | ||
d961db75 | 967 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
968 | mem->mem_type = mem_type; |
969 | mem->placement = cur_flags; | |
970 | return 0; | |
971 | } | |
972 | ||
973 | if (!type_found) | |
974 | return -EINVAL; | |
975 | ||
b6637526 DA |
976 | for (i = 0; i < placement->num_busy_placement; ++i) { |
977 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
978 | &mem_type); |
979 | if (ret) | |
980 | return ret; | |
ba4e7d97 | 981 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
982 | if (!man->has_type) |
983 | continue; | |
ba4e7d97 | 984 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
985 | bo->type == ttm_bo_type_user, |
986 | mem_type, | |
b6637526 | 987 | placement->busy_placement[i], |
ca262a99 | 988 | &cur_flags)) |
ba4e7d97 TH |
989 | continue; |
990 | ||
ae3e8122 TH |
991 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
992 | cur_flags); | |
ca262a99 JG |
993 | /* |
994 | * Use the access and other non-mapping-related flag bits from | |
995 | * the memory placement flags to the current flags | |
996 | */ | |
b6637526 | 997 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 998 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 999 | |
0eaddb28 TH |
1000 | |
1001 | if (mem_type == TTM_PL_SYSTEM) { | |
1002 | mem->mem_type = mem_type; | |
1003 | mem->placement = cur_flags; | |
1004 | mem->mm_node = NULL; | |
1005 | return 0; | |
1006 | } | |
1007 | ||
ca262a99 | 1008 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1009 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1010 | if (ret == 0 && mem->mm_node) { |
1011 | mem->placement = cur_flags; | |
1012 | return 0; | |
1013 | } | |
98ffc415 TH |
1014 | if (ret == -ERESTARTSYS) |
1015 | has_erestartsys = true; | |
ba4e7d97 | 1016 | } |
98ffc415 | 1017 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1018 | return ret; |
1019 | } | |
1020 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1021 | ||
1022 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1023 | { | |
ba4e7d97 TH |
1024 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1025 | return -EBUSY; | |
1026 | ||
98ffc415 TH |
1027 | return wait_event_interruptible(bo->event_queue, |
1028 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1029 | } |
d1ede145 | 1030 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1031 | |
1032 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1033 | struct ttm_placement *placement, |
9d87fa21 JG |
1034 | bool interruptible, bool no_wait_reserve, |
1035 | bool no_wait_gpu) | |
ba4e7d97 | 1036 | { |
ba4e7d97 TH |
1037 | int ret = 0; |
1038 | struct ttm_mem_reg mem; | |
1039 | ||
1040 | BUG_ON(!atomic_read(&bo->reserved)); | |
1041 | ||
1042 | /* | |
1043 | * FIXME: It's possible to pipeline buffer moves. | |
1044 | * Have the driver move function wait for idle when necessary, | |
1045 | * instead of doing it here. | |
1046 | */ | |
ba4e7d97 | 1047 | spin_lock(&bo->lock); |
9d87fa21 | 1048 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 | 1049 | spin_unlock(&bo->lock); |
ba4e7d97 TH |
1050 | if (ret) |
1051 | return ret; | |
ba4e7d97 TH |
1052 | mem.num_pages = bo->num_pages; |
1053 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1054 | mem.page_alignment = bo->mem.page_alignment; | |
82c5da6b | 1055 | mem.bus.io_reserved = false; |
ba4e7d97 TH |
1056 | /* |
1057 | * Determine where to move the buffer. | |
1058 | */ | |
9d87fa21 | 1059 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1060 | if (ret) |
1061 | goto out_unlock; | |
9d87fa21 | 1062 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1063 | out_unlock: |
d961db75 BS |
1064 | if (ret && mem.mm_node) |
1065 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1066 | return ret; |
1067 | } | |
1068 | ||
ca262a99 | 1069 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1070 | struct ttm_mem_reg *mem) |
1071 | { | |
ca262a99 | 1072 | int i; |
e22238ea | 1073 | |
d961db75 BS |
1074 | if (mem->mm_node && placement->lpfn != 0 && |
1075 | (mem->start < placement->fpfn || | |
1076 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1077 | return -1; |
ca262a99 JG |
1078 | |
1079 | for (i = 0; i < placement->num_placement; i++) { | |
1080 | if ((placement->placement[i] & mem->placement & | |
1081 | TTM_PL_MASK_CACHING) && | |
1082 | (placement->placement[i] & mem->placement & | |
1083 | TTM_PL_MASK_MEM)) | |
1084 | return i; | |
1085 | } | |
1086 | return -1; | |
ba4e7d97 TH |
1087 | } |
1088 | ||
09855acb JG |
1089 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1090 | struct ttm_placement *placement, | |
9d87fa21 JG |
1091 | bool interruptible, bool no_wait_reserve, |
1092 | bool no_wait_gpu) | |
ba4e7d97 TH |
1093 | { |
1094 | int ret; | |
1095 | ||
1096 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1097 | /* Check that range is valid */ |
1098 | if (placement->lpfn || placement->fpfn) | |
1099 | if (placement->fpfn > placement->lpfn || | |
1100 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1101 | return -EINVAL; | |
ba4e7d97 TH |
1102 | /* |
1103 | * Check whether we need to move buffer. | |
1104 | */ | |
ca262a99 JG |
1105 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1106 | if (ret < 0) { | |
9d87fa21 | 1107 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1108 | if (ret) |
ba4e7d97 | 1109 | return ret; |
ca262a99 JG |
1110 | } else { |
1111 | /* | |
1112 | * Use the access and other non-mapping-related flag bits from | |
1113 | * the compatible memory placement flags to the active flags | |
1114 | */ | |
1115 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1116 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1117 | } |
ba4e7d97 TH |
1118 | /* |
1119 | * We might need to add a TTM. | |
1120 | */ | |
ba4e7d97 TH |
1121 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1122 | ret = ttm_bo_add_ttm(bo, true); | |
1123 | if (ret) | |
1124 | return ret; | |
1125 | } | |
ba4e7d97 TH |
1126 | return 0; |
1127 | } | |
09855acb | 1128 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1129 | |
09855acb JG |
1130 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1131 | struct ttm_placement *placement) | |
ba4e7d97 | 1132 | { |
29e190e0 TH |
1133 | BUG_ON((placement->fpfn || placement->lpfn) && |
1134 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1135 | |
ba4e7d97 TH |
1136 | return 0; |
1137 | } | |
1138 | ||
09855acb JG |
1139 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1140 | struct ttm_buffer_object *bo, | |
1141 | unsigned long size, | |
1142 | enum ttm_bo_type type, | |
1143 | struct ttm_placement *placement, | |
1144 | uint32_t page_alignment, | |
1145 | unsigned long buffer_start, | |
1146 | bool interruptible, | |
1147 | struct file *persistant_swap_storage, | |
1148 | size_t acc_size, | |
1149 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1150 | { |
09855acb | 1151 | int ret = 0; |
ba4e7d97 TH |
1152 | unsigned long num_pages; |
1153 | ||
1154 | size += buffer_start & ~PAGE_MASK; | |
1155 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1156 | if (num_pages == 0) { | |
1157 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
7dfbbdcf TH |
1158 | if (destroy) |
1159 | (*destroy)(bo); | |
1160 | else | |
1161 | kfree(bo); | |
ba4e7d97 TH |
1162 | return -EINVAL; |
1163 | } | |
1164 | bo->destroy = destroy; | |
1165 | ||
1166 | spin_lock_init(&bo->lock); | |
1167 | kref_init(&bo->kref); | |
1168 | kref_init(&bo->list_kref); | |
1169 | atomic_set(&bo->cpu_writers, 0); | |
1170 | atomic_set(&bo->reserved, 1); | |
1171 | init_waitqueue_head(&bo->event_queue); | |
1172 | INIT_LIST_HEAD(&bo->lru); | |
1173 | INIT_LIST_HEAD(&bo->ddestroy); | |
1174 | INIT_LIST_HEAD(&bo->swap); | |
1175 | bo->bdev = bdev; | |
a987fcaa | 1176 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1177 | bo->type = type; |
1178 | bo->num_pages = num_pages; | |
eb6d2c39 | 1179 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1180 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1181 | bo->mem.num_pages = bo->num_pages; | |
1182 | bo->mem.mm_node = NULL; | |
1183 | bo->mem.page_alignment = page_alignment; | |
82c5da6b | 1184 | bo->mem.bus.io_reserved = false; |
ba4e7d97 TH |
1185 | bo->buffer_start = buffer_start & PAGE_MASK; |
1186 | bo->priv_flags = 0; | |
1187 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1188 | bo->seq_valid = false; | |
1189 | bo->persistant_swap_storage = persistant_swap_storage; | |
1190 | bo->acc_size = acc_size; | |
a987fcaa | 1191 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1192 | |
09855acb | 1193 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1194 | if (unlikely(ret != 0)) |
1195 | goto out_err; | |
1196 | ||
ba4e7d97 TH |
1197 | /* |
1198 | * For ttm_bo_type_device buffers, allocate | |
1199 | * address space from the device. | |
1200 | */ | |
ba4e7d97 TH |
1201 | if (bo->type == ttm_bo_type_device) { |
1202 | ret = ttm_bo_setup_vm(bo); | |
1203 | if (ret) | |
1204 | goto out_err; | |
1205 | } | |
1206 | ||
9d87fa21 | 1207 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1208 | if (ret) |
1209 | goto out_err; | |
1210 | ||
1211 | ttm_bo_unreserve(bo); | |
1212 | return 0; | |
1213 | ||
1214 | out_err: | |
1215 | ttm_bo_unreserve(bo); | |
1216 | ttm_bo_unref(&bo); | |
1217 | ||
1218 | return ret; | |
1219 | } | |
09855acb | 1220 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1221 | |
a987fcaa | 1222 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1223 | unsigned long num_pages) |
1224 | { | |
1225 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1226 | PAGE_MASK; | |
1227 | ||
a987fcaa | 1228 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1229 | } |
1230 | ||
09855acb JG |
1231 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1232 | unsigned long size, | |
1233 | enum ttm_bo_type type, | |
1234 | struct ttm_placement *placement, | |
1235 | uint32_t page_alignment, | |
1236 | unsigned long buffer_start, | |
1237 | bool interruptible, | |
1238 | struct file *persistant_swap_storage, | |
1239 | struct ttm_buffer_object **p_bo) | |
ba4e7d97 TH |
1240 | { |
1241 | struct ttm_buffer_object *bo; | |
a987fcaa | 1242 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1243 | int ret; |
ba4e7d97 TH |
1244 | |
1245 | size_t acc_size = | |
a987fcaa | 1246 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1247 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1248 | if (unlikely(ret != 0)) |
1249 | return ret; | |
1250 | ||
1251 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1252 | ||
1253 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1254 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1255 | return -ENOMEM; |
1256 | } | |
1257 | ||
09855acb JG |
1258 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1259 | buffer_start, interruptible, | |
1260 | persistant_swap_storage, acc_size, NULL); | |
ba4e7d97 TH |
1261 | if (likely(ret == 0)) |
1262 | *p_bo = bo; | |
1263 | ||
1264 | return ret; | |
1265 | } | |
1266 | ||
ba4e7d97 | 1267 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1268 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1269 | { |
ca262a99 | 1270 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1271 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1272 | int ret; |
ba4e7d97 TH |
1273 | |
1274 | /* | |
1275 | * Can't use standard list traversal since we're unlocking. | |
1276 | */ | |
1277 | ||
a987fcaa | 1278 | spin_lock(&glob->lru_lock); |
ca262a99 | 1279 | while (!list_empty(&man->lru)) { |
a987fcaa | 1280 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1281 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1282 | if (ret) { |
1283 | if (allow_errors) { | |
1284 | return ret; | |
1285 | } else { | |
1286 | printk(KERN_ERR TTM_PFX | |
1287 | "Cleanup eviction failed\n"); | |
1288 | } | |
1289 | } | |
a987fcaa | 1290 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1291 | } |
a987fcaa | 1292 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1293 | return 0; |
1294 | } | |
1295 | ||
1296 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1297 | { | |
c96e7c7a | 1298 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1299 | int ret = -EINVAL; |
1300 | ||
1301 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1302 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1303 | return ret; | |
1304 | } | |
c96e7c7a | 1305 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1306 | |
1307 | if (!man->has_type) { | |
1308 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1309 | "memory manager type %u\n", mem_type); | |
1310 | return ret; | |
1311 | } | |
1312 | ||
1313 | man->use_type = false; | |
1314 | man->has_type = false; | |
1315 | ||
1316 | ret = 0; | |
1317 | if (mem_type > 0) { | |
ca262a99 | 1318 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1319 | |
d961db75 | 1320 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1321 | } |
1322 | ||
1323 | return ret; | |
1324 | } | |
1325 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1326 | ||
1327 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1328 | { | |
1329 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1330 | ||
1331 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1332 | printk(KERN_ERR TTM_PFX | |
1333 | "Illegal memory manager memory type %u.\n", | |
1334 | mem_type); | |
1335 | return -EINVAL; | |
1336 | } | |
1337 | ||
1338 | if (!man->has_type) { | |
1339 | printk(KERN_ERR TTM_PFX | |
1340 | "Memory type %u has not been initialized.\n", | |
1341 | mem_type); | |
1342 | return 0; | |
1343 | } | |
1344 | ||
ca262a99 | 1345 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1346 | } |
1347 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1348 | ||
1349 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1350 | unsigned long p_size) |
ba4e7d97 TH |
1351 | { |
1352 | int ret = -EINVAL; | |
1353 | struct ttm_mem_type_manager *man; | |
1354 | ||
dbc4a5b8 | 1355 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1356 | man = &bdev->man[type]; |
dbc4a5b8 | 1357 | BUG_ON(man->has_type); |
ba4e7d97 TH |
1358 | |
1359 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1360 | if (ret) | |
1361 | return ret; | |
d961db75 | 1362 | man->bdev = bdev; |
ba4e7d97 TH |
1363 | |
1364 | ret = 0; | |
1365 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1366 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1367 | if (ret) |
1368 | return ret; | |
1369 | } | |
1370 | man->has_type = true; | |
1371 | man->use_type = true; | |
1372 | man->size = p_size; | |
1373 | ||
1374 | INIT_LIST_HEAD(&man->lru); | |
1375 | ||
1376 | return 0; | |
1377 | } | |
1378 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1379 | ||
a987fcaa TH |
1380 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1381 | { | |
1382 | struct ttm_bo_global *glob = | |
1383 | container_of(kobj, struct ttm_bo_global, kobj); | |
1384 | ||
a987fcaa TH |
1385 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1386 | __free_page(glob->dummy_read_page); | |
1387 | kfree(glob); | |
1388 | } | |
1389 | ||
ba4420c2 | 1390 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1391 | { |
1392 | struct ttm_bo_global *glob = ref->object; | |
1393 | ||
1394 | kobject_del(&glob->kobj); | |
1395 | kobject_put(&glob->kobj); | |
1396 | } | |
1397 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1398 | ||
ba4420c2 | 1399 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1400 | { |
1401 | struct ttm_bo_global_ref *bo_ref = | |
1402 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1403 | struct ttm_bo_global *glob = ref->object; | |
1404 | int ret; | |
1405 | ||
1406 | mutex_init(&glob->device_list_mutex); | |
1407 | spin_lock_init(&glob->lru_lock); | |
1408 | glob->mem_glob = bo_ref->mem_glob; | |
1409 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1410 | ||
1411 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1412 | ret = -ENOMEM; | |
1413 | goto out_no_drp; | |
1414 | } | |
1415 | ||
1416 | INIT_LIST_HEAD(&glob->swap_lru); | |
1417 | INIT_LIST_HEAD(&glob->device_list); | |
1418 | ||
1419 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1420 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1421 | if (unlikely(ret != 0)) { | |
1422 | printk(KERN_ERR TTM_PFX | |
1423 | "Could not register buffer object swapout.\n"); | |
1424 | goto out_no_shrink; | |
1425 | } | |
1426 | ||
1427 | glob->ttm_bo_extra_size = | |
1428 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1429 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1430 | ||
1431 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1432 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1433 | ||
1434 | atomic_set(&glob->bo_count, 0); | |
1435 | ||
b642ed06 RD |
1436 | ret = kobject_init_and_add( |
1437 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1438 | if (unlikely(ret != 0)) |
1439 | kobject_put(&glob->kobj); | |
1440 | return ret; | |
1441 | out_no_shrink: | |
1442 | __free_page(glob->dummy_read_page); | |
1443 | out_no_drp: | |
1444 | kfree(glob); | |
1445 | return ret; | |
1446 | } | |
1447 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1448 | ||
1449 | ||
ba4e7d97 TH |
1450 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1451 | { | |
1452 | int ret = 0; | |
1453 | unsigned i = TTM_NUM_MEM_TYPES; | |
1454 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1455 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1456 | |
1457 | while (i--) { | |
1458 | man = &bdev->man[i]; | |
1459 | if (man->has_type) { | |
1460 | man->use_type = false; | |
1461 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1462 | ret = -EBUSY; | |
1463 | printk(KERN_ERR TTM_PFX | |
1464 | "DRM memory manager type %d " | |
1465 | "is not clean.\n", i); | |
1466 | } | |
1467 | man->has_type = false; | |
1468 | } | |
1469 | } | |
1470 | ||
a987fcaa TH |
1471 | mutex_lock(&glob->device_list_mutex); |
1472 | list_del(&bdev->device_list); | |
1473 | mutex_unlock(&glob->device_list_mutex); | |
1474 | ||
ba4e7d97 TH |
1475 | if (!cancel_delayed_work(&bdev->wq)) |
1476 | flush_scheduled_work(); | |
1477 | ||
1478 | while (ttm_bo_delayed_delete(bdev, true)) | |
1479 | ; | |
1480 | ||
a987fcaa | 1481 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1482 | if (list_empty(&bdev->ddestroy)) |
1483 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1484 | ||
1485 | if (list_empty(&bdev->man[0].lru)) | |
1486 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1487 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1488 | |
ba4e7d97 TH |
1489 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1490 | write_lock(&bdev->vm_lock); | |
1491 | drm_mm_takedown(&bdev->addr_space_mm); | |
1492 | write_unlock(&bdev->vm_lock); | |
1493 | ||
ba4e7d97 TH |
1494 | return ret; |
1495 | } | |
1496 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1497 | ||
ba4e7d97 | 1498 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1499 | struct ttm_bo_global *glob, |
1500 | struct ttm_bo_driver *driver, | |
51c8b407 | 1501 | uint64_t file_page_offset, |
ad49f501 | 1502 | bool need_dma32) |
ba4e7d97 TH |
1503 | { |
1504 | int ret = -EINVAL; | |
1505 | ||
ba4e7d97 | 1506 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1507 | bdev->driver = driver; |
ba4e7d97 TH |
1508 | |
1509 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1510 | ||
ba4e7d97 TH |
1511 | /* |
1512 | * Initialize the system memory buffer type. | |
1513 | * Other types need to be driver / IOCTL initialized. | |
1514 | */ | |
ca262a99 | 1515 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1516 | if (unlikely(ret != 0)) |
a987fcaa | 1517 | goto out_no_sys; |
ba4e7d97 TH |
1518 | |
1519 | bdev->addr_space_rb = RB_ROOT; | |
1520 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1521 | if (unlikely(ret != 0)) | |
a987fcaa | 1522 | goto out_no_addr_mm; |
ba4e7d97 TH |
1523 | |
1524 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1525 | bdev->nice_mode = true; | |
1526 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1527 | bdev->dev_mapping = NULL; |
a987fcaa | 1528 | bdev->glob = glob; |
ad49f501 | 1529 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1530 | |
a987fcaa TH |
1531 | mutex_lock(&glob->device_list_mutex); |
1532 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1533 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1534 | |
1535 | return 0; | |
a987fcaa | 1536 | out_no_addr_mm: |
ba4e7d97 | 1537 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1538 | out_no_sys: |
ba4e7d97 TH |
1539 | return ret; |
1540 | } | |
1541 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1542 | ||
1543 | /* | |
1544 | * buffer object vm functions. | |
1545 | */ | |
1546 | ||
1547 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1548 | { | |
1549 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1550 | ||
1551 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1552 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1553 | return false; | |
1554 | ||
1555 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1556 | return false; | |
1557 | ||
1558 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1559 | return false; | |
1560 | } | |
1561 | return true; | |
1562 | } | |
1563 | ||
ba4e7d97 TH |
1564 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) |
1565 | { | |
1566 | struct ttm_bo_device *bdev = bo->bdev; | |
1567 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1568 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1569 | ||
1570 | if (!bdev->dev_mapping) | |
1571 | return; | |
ba4e7d97 | 1572 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
82c5da6b | 1573 | ttm_mem_io_free(bdev, &bo->mem); |
ba4e7d97 | 1574 | } |
e024e110 | 1575 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1576 | |
1577 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1578 | { | |
1579 | struct ttm_bo_device *bdev = bo->bdev; | |
1580 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1581 | struct rb_node *parent = NULL; | |
1582 | struct ttm_buffer_object *cur_bo; | |
1583 | unsigned long offset = bo->vm_node->start; | |
1584 | unsigned long cur_offset; | |
1585 | ||
1586 | while (*cur) { | |
1587 | parent = *cur; | |
1588 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1589 | cur_offset = cur_bo->vm_node->start; | |
1590 | if (offset < cur_offset) | |
1591 | cur = &parent->rb_left; | |
1592 | else if (offset > cur_offset) | |
1593 | cur = &parent->rb_right; | |
1594 | else | |
1595 | BUG(); | |
1596 | } | |
1597 | ||
1598 | rb_link_node(&bo->vm_rb, parent, cur); | |
1599 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * ttm_bo_setup_vm: | |
1604 | * | |
1605 | * @bo: the buffer to allocate address space for | |
1606 | * | |
1607 | * Allocate address space in the drm device so that applications | |
1608 | * can mmap the buffer and access the contents. This only | |
1609 | * applies to ttm_bo_type_device objects as others are not | |
1610 | * placed in the drm device address space. | |
1611 | */ | |
1612 | ||
1613 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1614 | { | |
1615 | struct ttm_bo_device *bdev = bo->bdev; | |
1616 | int ret; | |
1617 | ||
1618 | retry_pre_get: | |
1619 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1620 | if (unlikely(ret != 0)) | |
1621 | return ret; | |
1622 | ||
1623 | write_lock(&bdev->vm_lock); | |
1624 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1625 | bo->mem.num_pages, 0, 0); | |
1626 | ||
1627 | if (unlikely(bo->vm_node == NULL)) { | |
1628 | ret = -ENOMEM; | |
1629 | goto out_unlock; | |
1630 | } | |
1631 | ||
1632 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1633 | bo->mem.num_pages, 0); | |
1634 | ||
1635 | if (unlikely(bo->vm_node == NULL)) { | |
1636 | write_unlock(&bdev->vm_lock); | |
1637 | goto retry_pre_get; | |
1638 | } | |
1639 | ||
1640 | ttm_bo_vm_insert_rb(bo); | |
1641 | write_unlock(&bdev->vm_lock); | |
1642 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1643 | ||
1644 | return 0; | |
1645 | out_unlock: | |
1646 | write_unlock(&bdev->vm_lock); | |
1647 | return ret; | |
1648 | } | |
1649 | ||
1650 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1651 | bool lazy, bool interruptible, bool no_wait) | |
1652 | { | |
1653 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1654 | void *sync_obj; | |
1655 | void *sync_obj_arg; | |
1656 | int ret = 0; | |
1657 | ||
1658 | if (likely(bo->sync_obj == NULL)) | |
1659 | return 0; | |
1660 | ||
1661 | while (bo->sync_obj) { | |
1662 | ||
1663 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1664 | void *tmp_obj = bo->sync_obj; | |
1665 | bo->sync_obj = NULL; | |
1666 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1667 | spin_unlock(&bo->lock); | |
1668 | driver->sync_obj_unref(&tmp_obj); | |
1669 | spin_lock(&bo->lock); | |
1670 | continue; | |
1671 | } | |
1672 | ||
1673 | if (no_wait) | |
1674 | return -EBUSY; | |
1675 | ||
1676 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1677 | sync_obj_arg = bo->sync_obj_arg; | |
1678 | spin_unlock(&bo->lock); | |
1679 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1680 | lazy, interruptible); | |
1681 | if (unlikely(ret != 0)) { | |
1682 | driver->sync_obj_unref(&sync_obj); | |
1683 | spin_lock(&bo->lock); | |
1684 | return ret; | |
1685 | } | |
1686 | spin_lock(&bo->lock); | |
1687 | if (likely(bo->sync_obj == sync_obj && | |
1688 | bo->sync_obj_arg == sync_obj_arg)) { | |
1689 | void *tmp_obj = bo->sync_obj; | |
1690 | bo->sync_obj = NULL; | |
1691 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1692 | &bo->priv_flags); | |
1693 | spin_unlock(&bo->lock); | |
1694 | driver->sync_obj_unref(&sync_obj); | |
1695 | driver->sync_obj_unref(&tmp_obj); | |
1696 | spin_lock(&bo->lock); | |
fee280d3 TH |
1697 | } else { |
1698 | spin_unlock(&bo->lock); | |
1699 | driver->sync_obj_unref(&sync_obj); | |
1700 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1701 | } |
1702 | } | |
1703 | return 0; | |
1704 | } | |
1705 | EXPORT_SYMBOL(ttm_bo_wait); | |
1706 | ||
ba4e7d97 TH |
1707 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1708 | { | |
1709 | int ret = 0; | |
1710 | ||
1711 | /* | |
8cfe92d6 | 1712 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1713 | */ |
1714 | ||
1715 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1716 | if (unlikely(ret != 0)) | |
1717 | return ret; | |
1718 | spin_lock(&bo->lock); | |
1719 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1720 | spin_unlock(&bo->lock); | |
1721 | if (likely(ret == 0)) | |
1722 | atomic_inc(&bo->cpu_writers); | |
1723 | ttm_bo_unreserve(bo); | |
1724 | return ret; | |
1725 | } | |
d1ede145 | 1726 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1727 | |
1728 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1729 | { | |
1730 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1731 | wake_up_all(&bo->event_queue); | |
1732 | } | |
d1ede145 | 1733 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1734 | |
1735 | /** | |
1736 | * A buffer object shrink method that tries to swap out the first | |
1737 | * buffer object on the bo_global::swap_lru list. | |
1738 | */ | |
1739 | ||
1740 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1741 | { | |
a987fcaa TH |
1742 | struct ttm_bo_global *glob = |
1743 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1744 | struct ttm_buffer_object *bo; |
1745 | int ret = -EBUSY; | |
1746 | int put_count; | |
1747 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1748 | ||
a987fcaa | 1749 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1750 | while (ret == -EBUSY) { |
a987fcaa TH |
1751 | if (unlikely(list_empty(&glob->swap_lru))) { |
1752 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1753 | return -EBUSY; |
1754 | } | |
1755 | ||
a987fcaa | 1756 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1757 | struct ttm_buffer_object, swap); |
1758 | kref_get(&bo->list_kref); | |
1759 | ||
e1efc9b6 TH |
1760 | if (!list_empty(&bo->ddestroy)) { |
1761 | spin_unlock(&glob->lru_lock); | |
1762 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1763 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1764 | continue; | |
1765 | } | |
1766 | ||
ba4e7d97 TH |
1767 | /** |
1768 | * Reserve buffer. Since we unlock while sleeping, we need | |
1769 | * to re-check that nobody removed us from the swap-list while | |
1770 | * we slept. | |
1771 | */ | |
1772 | ||
1773 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1774 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1775 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1776 | ttm_bo_wait_unreserved(bo, false); |
1777 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1778 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1779 | } |
1780 | } | |
1781 | ||
1782 | BUG_ON(ret != 0); | |
1783 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1784 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1785 | |
1786 | while (put_count--) | |
1787 | kref_put(&bo->list_kref, ttm_bo_ref_bug); | |
1788 | ||
1789 | /** | |
1790 | * Wait for GPU, then move to system cached. | |
1791 | */ | |
1792 | ||
1793 | spin_lock(&bo->lock); | |
1794 | ret = ttm_bo_wait(bo, false, false, false); | |
1795 | spin_unlock(&bo->lock); | |
1796 | ||
1797 | if (unlikely(ret != 0)) | |
1798 | goto out; | |
1799 | ||
1800 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1801 | struct ttm_mem_reg evict_mem; | |
1802 | ||
1803 | evict_mem = bo->mem; | |
1804 | evict_mem.mm_node = NULL; | |
1805 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1806 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1807 | ||
1808 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1809 | false, false, false); |
ba4e7d97 TH |
1810 | if (unlikely(ret != 0)) |
1811 | goto out; | |
1812 | } | |
1813 | ||
1814 | ttm_bo_unmap_virtual(bo); | |
1815 | ||
1816 | /** | |
1817 | * Swap out. Buffer will be swapped in again as soon as | |
1818 | * anyone tries to access a ttm page. | |
1819 | */ | |
1820 | ||
3f09ea4e TH |
1821 | if (bo->bdev->driver->swap_notify) |
1822 | bo->bdev->driver->swap_notify(bo); | |
1823 | ||
ba4e7d97 TH |
1824 | ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage); |
1825 | out: | |
1826 | ||
1827 | /** | |
1828 | * | |
1829 | * Unreserve without putting on LRU to avoid swapping out an | |
1830 | * already swapped buffer. | |
1831 | */ | |
1832 | ||
1833 | atomic_set(&bo->reserved, 0); | |
1834 | wake_up_all(&bo->event_queue); | |
1835 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1836 | return ret; | |
1837 | } | |
1838 | ||
1839 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1840 | { | |
a987fcaa | 1841 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1842 | ; |
1843 | } | |
e99e1e78 | 1844 | EXPORT_SYMBOL(ttm_bo_swapout_all); |