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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> | |
60063497 | 40 | #include <linux/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 | 171 | |
d6ea8886 | 172 | void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
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 | ||
d6ea8886 | 194 | int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
195 | { |
196 | int put_count = 0; | |
197 | ||
198 | if (!list_empty(&bo->swap)) { | |
199 | list_del_init(&bo->swap); | |
200 | ++put_count; | |
201 | } | |
202 | if (!list_empty(&bo->lru)) { | |
203 | list_del_init(&bo->lru); | |
204 | ++put_count; | |
205 | } | |
206 | ||
207 | /* | |
208 | * TODO: Add a driver hook to delete from | |
209 | * driver-specific LRU's here. | |
210 | */ | |
211 | ||
212 | return put_count; | |
213 | } | |
214 | ||
215 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
216 | bool interruptible, | |
217 | bool no_wait, bool use_sequence, uint32_t sequence) | |
218 | { | |
a987fcaa | 219 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
220 | int ret; |
221 | ||
222 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
95ccb0f3 TH |
223 | /** |
224 | * Deadlock avoidance for multi-bo reserving. | |
225 | */ | |
96726fe5 TH |
226 | if (use_sequence && bo->seq_valid) { |
227 | /** | |
228 | * We've already reserved this one. | |
229 | */ | |
230 | if (unlikely(sequence == bo->val_seq)) | |
231 | return -EDEADLK; | |
232 | /** | |
233 | * Already reserved by a thread that will not back | |
234 | * off for us. We need to back off. | |
235 | */ | |
236 | if (unlikely(sequence - bo->val_seq < (1 << 31))) | |
237 | return -EAGAIN; | |
ba4e7d97 TH |
238 | } |
239 | ||
240 | if (no_wait) | |
241 | return -EBUSY; | |
242 | ||
a987fcaa | 243 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 244 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 245 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
246 | |
247 | if (unlikely(ret)) | |
248 | return ret; | |
249 | } | |
250 | ||
251 | if (use_sequence) { | |
95ccb0f3 TH |
252 | /** |
253 | * Wake up waiters that may need to recheck for deadlock, | |
254 | * if we decreased the sequence number. | |
255 | */ | |
256 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
257 | || !bo->seq_valid)) | |
258 | wake_up_all(&bo->event_queue); | |
259 | ||
ba4e7d97 TH |
260 | bo->val_seq = sequence; |
261 | bo->seq_valid = true; | |
262 | } else { | |
263 | bo->seq_valid = false; | |
264 | } | |
265 | ||
266 | return 0; | |
267 | } | |
268 | EXPORT_SYMBOL(ttm_bo_reserve); | |
269 | ||
270 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
271 | { | |
272 | BUG(); | |
273 | } | |
274 | ||
d6ea8886 DA |
275 | void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
276 | bool never_free) | |
277 | { | |
2357cbe5 TH |
278 | kref_sub(&bo->list_kref, count, |
279 | (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list); | |
d6ea8886 DA |
280 | } |
281 | ||
ba4e7d97 TH |
282 | int ttm_bo_reserve(struct ttm_buffer_object *bo, |
283 | bool interruptible, | |
284 | bool no_wait, bool use_sequence, uint32_t sequence) | |
285 | { | |
a987fcaa | 286 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
287 | int put_count = 0; |
288 | int ret; | |
289 | ||
a987fcaa | 290 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
291 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
292 | sequence); | |
293 | if (likely(ret == 0)) | |
294 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 295 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 296 | |
d6ea8886 | 297 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
298 | |
299 | return ret; | |
300 | } | |
301 | ||
95762c2b TH |
302 | void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo) |
303 | { | |
304 | ttm_bo_add_to_lru(bo); | |
305 | atomic_set(&bo->reserved, 0); | |
306 | wake_up_all(&bo->event_queue); | |
307 | } | |
308 | ||
ba4e7d97 TH |
309 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) |
310 | { | |
a987fcaa | 311 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 312 | |
a987fcaa | 313 | spin_lock(&glob->lru_lock); |
95762c2b | 314 | ttm_bo_unreserve_locked(bo); |
a987fcaa | 315 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
316 | } |
317 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
318 | ||
319 | /* | |
320 | * Call bo->mutex locked. | |
321 | */ | |
ba4e7d97 TH |
322 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
323 | { | |
324 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 325 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
326 | int ret = 0; |
327 | uint32_t page_flags = 0; | |
328 | ||
329 | TTM_ASSERT_LOCKED(&bo->mutex); | |
330 | bo->ttm = NULL; | |
331 | ||
ad49f501 DA |
332 | if (bdev->need_dma32) |
333 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
334 | ||
ba4e7d97 TH |
335 | switch (bo->type) { |
336 | case ttm_bo_type_device: | |
337 | if (zero_alloc) | |
338 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
339 | case ttm_bo_type_kernel: | |
340 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 341 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
342 | if (unlikely(bo->ttm == NULL)) |
343 | ret = -ENOMEM; | |
344 | break; | |
345 | case ttm_bo_type_user: | |
346 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
347 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 348 | glob->dummy_read_page); |
447aeb90 | 349 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 350 | ret = -ENOMEM; |
447aeb90 DA |
351 | break; |
352 | } | |
ba4e7d97 TH |
353 | |
354 | ret = ttm_tt_set_user(bo->ttm, current, | |
355 | bo->buffer_start, bo->num_pages); | |
7c4c3960 | 356 | if (unlikely(ret != 0)) { |
ba4e7d97 | 357 | ttm_tt_destroy(bo->ttm); |
7c4c3960 MS |
358 | bo->ttm = NULL; |
359 | } | |
ba4e7d97 TH |
360 | break; |
361 | default: | |
362 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
363 | ret = -EINVAL; | |
364 | break; | |
365 | } | |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
370 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
371 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
372 | bool evict, bool interruptible, |
373 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
374 | { |
375 | struct ttm_bo_device *bdev = bo->bdev; | |
376 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
377 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
378 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
379 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
380 | int ret = 0; | |
381 | ||
382 | if (old_is_pci || new_is_pci || | |
eba67093 TH |
383 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { |
384 | ret = ttm_mem_io_lock(old_man, true); | |
385 | if (unlikely(ret != 0)) | |
386 | goto out_err; | |
387 | ttm_bo_unmap_virtual_locked(bo); | |
388 | ttm_mem_io_unlock(old_man); | |
389 | } | |
ba4e7d97 TH |
390 | |
391 | /* | |
392 | * Create and bind a ttm if required. | |
393 | */ | |
394 | ||
8d3bb236 BS |
395 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
396 | if (bo->ttm == NULL) { | |
397 | ret = ttm_bo_add_ttm(bo, false); | |
398 | if (ret) | |
399 | goto out_err; | |
400 | } | |
ba4e7d97 TH |
401 | |
402 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
403 | if (ret) | |
87ef9209 | 404 | goto out_err; |
ba4e7d97 TH |
405 | |
406 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
407 | ret = ttm_tt_bind(bo->ttm, mem); | |
408 | if (ret) | |
409 | goto out_err; | |
410 | } | |
411 | ||
412 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
82ef594e BS |
413 | if (bdev->driver->move_notify) |
414 | bdev->driver->move_notify(bo, mem); | |
ca262a99 | 415 | bo->mem = *mem; |
ba4e7d97 | 416 | mem->mm_node = NULL; |
ba4e7d97 TH |
417 | goto moved; |
418 | } | |
ba4e7d97 TH |
419 | } |
420 | ||
e024e110 DA |
421 | if (bdev->driver->move_notify) |
422 | bdev->driver->move_notify(bo, mem); | |
423 | ||
ba4e7d97 TH |
424 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
425 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 426 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
427 | else if (bdev->driver->move) |
428 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 429 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 430 | else |
9d87fa21 | 431 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
432 | |
433 | if (ret) | |
434 | goto out_err; | |
435 | ||
436 | moved: | |
437 | if (bo->evicted) { | |
438 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
439 | if (ret) | |
440 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
441 | bo->evicted = false; | |
442 | } | |
443 | ||
444 | if (bo->mem.mm_node) { | |
d961db75 | 445 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
446 | bdev->man[bo->mem.mem_type].gpu_offset; |
447 | bo->cur_placement = bo->mem.placement; | |
354fb52c TH |
448 | } else |
449 | bo->offset = 0; | |
ba4e7d97 TH |
450 | |
451 | return 0; | |
452 | ||
453 | out_err: | |
454 | new_man = &bdev->man[bo->mem.mem_type]; | |
455 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
456 | ttm_tt_unbind(bo->ttm); | |
457 | ttm_tt_destroy(bo->ttm); | |
458 | bo->ttm = NULL; | |
459 | } | |
460 | ||
461 | return ret; | |
462 | } | |
463 | ||
1df6a2eb | 464 | /** |
40d857bb | 465 | * Call bo::reserved. |
1df6a2eb | 466 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
467 | * This is the place to put in driver specific hooks to release |
468 | * driver private resources. | |
469 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
470 | */ |
471 | ||
472 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
473 | { | |
1df6a2eb | 474 | if (bo->ttm) { |
1df6a2eb TH |
475 | ttm_tt_unbind(bo->ttm); |
476 | ttm_tt_destroy(bo->ttm); | |
477 | bo->ttm = NULL; | |
1df6a2eb | 478 | } |
40d857bb | 479 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
480 | |
481 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
482 | |
483 | /* | |
484 | * Make processes trying to reserve really pick it up. | |
485 | */ | |
486 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 487 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
488 | } |
489 | ||
e1efc9b6 | 490 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
491 | { |
492 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 493 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 494 | struct ttm_bo_driver *driver; |
aa123268 | 495 | void *sync_obj = NULL; |
e1efc9b6 TH |
496 | void *sync_obj_arg; |
497 | int put_count; | |
ba4e7d97 TH |
498 | int ret; |
499 | ||
702adba2 | 500 | spin_lock(&bdev->fence_lock); |
e1efc9b6 | 501 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 502 | if (!bo->sync_obj) { |
ba4e7d97 | 503 | |
a987fcaa | 504 | spin_lock(&glob->lru_lock); |
aaa20736 | 505 | |
1df6a2eb | 506 | /** |
702adba2 | 507 | * Lock inversion between bo:reserve and bdev::fence_lock here, |
e1efc9b6 | 508 | * but that's OK, since we're only trylocking. |
1df6a2eb TH |
509 | */ |
510 | ||
e1efc9b6 | 511 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 512 | |
e1efc9b6 TH |
513 | if (unlikely(ret == -EBUSY)) |
514 | goto queue; | |
1df6a2eb | 515 | |
702adba2 | 516 | spin_unlock(&bdev->fence_lock); |
1df6a2eb | 517 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 518 | |
40d857bb | 519 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 520 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 521 | |
d6ea8886 | 522 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 523 | |
e1efc9b6 TH |
524 | return; |
525 | } else { | |
526 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 527 | } |
e1efc9b6 | 528 | queue: |
e1efc9b6 | 529 | driver = bdev->driver; |
aa123268 TH |
530 | if (bo->sync_obj) |
531 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
532 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
533 | |
534 | kref_get(&bo->list_kref); | |
535 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
536 | spin_unlock(&glob->lru_lock); | |
702adba2 | 537 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 | 538 | |
aa123268 | 539 | if (sync_obj) { |
e1efc9b6 | 540 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
541 | driver->sync_obj_unref(&sync_obj); |
542 | } | |
e1efc9b6 TH |
543 | schedule_delayed_work(&bdev->wq, |
544 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
545 | } | |
546 | ||
547 | /** | |
548 | * function ttm_bo_cleanup_refs | |
549 | * If bo idle, remove from delayed- and lru lists, and unref. | |
550 | * If not idle, do nothing. | |
551 | * | |
552 | * @interruptible Any sleeps should occur interruptibly. | |
553 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
554 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
555 | */ | |
556 | ||
557 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
558 | bool interruptible, | |
559 | bool no_wait_reserve, | |
560 | bool no_wait_gpu) | |
561 | { | |
702adba2 | 562 | struct ttm_bo_device *bdev = bo->bdev; |
e1efc9b6 TH |
563 | struct ttm_bo_global *glob = bo->glob; |
564 | int put_count; | |
565 | int ret = 0; | |
566 | ||
567 | retry: | |
702adba2 | 568 | spin_lock(&bdev->fence_lock); |
e1efc9b6 | 569 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 570 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 TH |
571 | |
572 | if (unlikely(ret != 0)) | |
573 | return ret; | |
574 | ||
a987fcaa | 575 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
576 | ret = ttm_bo_reserve_locked(bo, interruptible, |
577 | no_wait_reserve, false, 0); | |
ba4e7d97 | 578 | |
e1efc9b6 | 579 | if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) { |
a987fcaa | 580 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
581 | return ret; |
582 | } | |
ba4e7d97 | 583 | |
e1efc9b6 TH |
584 | /** |
585 | * We can re-check for sync object without taking | |
586 | * the bo::lock since setting the sync object requires | |
587 | * also bo::reserved. A busy object at this point may | |
588 | * be caused by another thread recently starting an accelerated | |
589 | * eviction. | |
590 | */ | |
ba4e7d97 | 591 | |
e1efc9b6 TH |
592 | if (unlikely(bo->sync_obj)) { |
593 | atomic_set(&bo->reserved, 0); | |
594 | wake_up_all(&bo->event_queue); | |
a987fcaa | 595 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 596 | goto retry; |
ba4e7d97 TH |
597 | } |
598 | ||
e1efc9b6 TH |
599 | put_count = ttm_bo_del_from_lru(bo); |
600 | list_del_init(&bo->ddestroy); | |
601 | ++put_count; | |
602 | ||
603 | spin_unlock(&glob->lru_lock); | |
604 | ttm_bo_cleanup_memtype_use(bo); | |
605 | ||
d6ea8886 | 606 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
607 | |
608 | return 0; | |
ba4e7d97 TH |
609 | } |
610 | ||
611 | /** | |
612 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
613 | * encountered buffers. | |
614 | */ | |
615 | ||
616 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
617 | { | |
a987fcaa | 618 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
619 | struct ttm_buffer_object *entry = NULL; |
620 | int ret = 0; | |
ba4e7d97 | 621 | |
a987fcaa | 622 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
623 | if (list_empty(&bdev->ddestroy)) |
624 | goto out_unlock; | |
625 | ||
626 | entry = list_first_entry(&bdev->ddestroy, | |
627 | struct ttm_buffer_object, ddestroy); | |
628 | kref_get(&entry->list_kref); | |
629 | ||
630 | for (;;) { | |
631 | struct ttm_buffer_object *nentry = NULL; | |
632 | ||
633 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
634 | nentry = list_first_entry(&entry->ddestroy, | |
635 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
636 | kref_get(&nentry->list_kref); |
637 | } | |
ba4e7d97 | 638 | |
a987fcaa | 639 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
640 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
641 | !remove_all); | |
ba4e7d97 | 642 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
643 | entry = nentry; |
644 | ||
645 | if (ret || !entry) | |
646 | goto out; | |
ba4e7d97 | 647 | |
a987fcaa | 648 | spin_lock(&glob->lru_lock); |
1a961ce0 | 649 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
650 | break; |
651 | } | |
ba4e7d97 | 652 | |
1a961ce0 LB |
653 | out_unlock: |
654 | spin_unlock(&glob->lru_lock); | |
655 | out: | |
656 | if (entry) | |
657 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
658 | return ret; |
659 | } | |
660 | ||
661 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
662 | { | |
663 | struct ttm_bo_device *bdev = | |
664 | container_of(work, struct ttm_bo_device, wq.work); | |
665 | ||
666 | if (ttm_bo_delayed_delete(bdev, false)) { | |
667 | schedule_delayed_work(&bdev->wq, | |
668 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
669 | } | |
670 | } | |
671 | ||
672 | static void ttm_bo_release(struct kref *kref) | |
673 | { | |
674 | struct ttm_buffer_object *bo = | |
675 | container_of(kref, struct ttm_buffer_object, kref); | |
676 | struct ttm_bo_device *bdev = bo->bdev; | |
eba67093 | 677 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
ba4e7d97 TH |
678 | |
679 | if (likely(bo->vm_node != NULL)) { | |
680 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
681 | drm_mm_put_block(bo->vm_node); | |
682 | bo->vm_node = NULL; | |
683 | } | |
684 | write_unlock(&bdev->vm_lock); | |
eba67093 TH |
685 | ttm_mem_io_lock(man, false); |
686 | ttm_mem_io_free_vm(bo); | |
687 | ttm_mem_io_unlock(man); | |
e1efc9b6 | 688 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
689 | kref_put(&bo->list_kref, ttm_bo_release_list); |
690 | write_lock(&bdev->vm_lock); | |
691 | } | |
692 | ||
693 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
694 | { | |
695 | struct ttm_buffer_object *bo = *p_bo; | |
696 | struct ttm_bo_device *bdev = bo->bdev; | |
697 | ||
698 | *p_bo = NULL; | |
699 | write_lock(&bdev->vm_lock); | |
700 | kref_put(&bo->kref, ttm_bo_release); | |
701 | write_unlock(&bdev->vm_lock); | |
702 | } | |
703 | EXPORT_SYMBOL(ttm_bo_unref); | |
704 | ||
7c5ee536 MG |
705 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
706 | { | |
707 | return cancel_delayed_work_sync(&bdev->wq); | |
708 | } | |
709 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
710 | ||
711 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
712 | { | |
713 | if (resched) | |
714 | schedule_delayed_work(&bdev->wq, | |
715 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
716 | } | |
717 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
718 | ||
ca262a99 | 719 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 720 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 721 | { |
ba4e7d97 TH |
722 | struct ttm_bo_device *bdev = bo->bdev; |
723 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
724 | struct ttm_placement placement; |
725 | int ret = 0; | |
ba4e7d97 | 726 | |
702adba2 | 727 | spin_lock(&bdev->fence_lock); |
9d87fa21 | 728 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 729 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 730 | |
78ecf091 | 731 | if (unlikely(ret != 0)) { |
98ffc415 | 732 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
733 | printk(KERN_ERR TTM_PFX |
734 | "Failed to expire sync object before " | |
735 | "buffer eviction.\n"); | |
736 | } | |
ba4e7d97 TH |
737 | goto out; |
738 | } | |
739 | ||
740 | BUG_ON(!atomic_read(&bo->reserved)); | |
741 | ||
742 | evict_mem = bo->mem; | |
743 | evict_mem.mm_node = NULL; | |
eba67093 TH |
744 | evict_mem.bus.io_reserved_vm = false; |
745 | evict_mem.bus.io_reserved_count = 0; | |
ba4e7d97 | 746 | |
7cb7d1d7 JG |
747 | placement.fpfn = 0; |
748 | placement.lpfn = 0; | |
749 | placement.num_placement = 0; | |
750 | placement.num_busy_placement = 0; | |
ca262a99 JG |
751 | bdev->driver->evict_flags(bo, &placement); |
752 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 753 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 754 | if (ret) { |
fb53f862 | 755 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
756 | printk(KERN_ERR TTM_PFX |
757 | "Failed to find memory space for " | |
758 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
759 | ttm_bo_mem_space_debug(bo, &placement); |
760 | } | |
ba4e7d97 TH |
761 | goto out; |
762 | } | |
763 | ||
764 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 765 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 766 | if (ret) { |
98ffc415 | 767 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 768 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 769 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
770 | goto out; |
771 | } | |
ca262a99 JG |
772 | bo->evicted = true; |
773 | out: | |
774 | return ret; | |
775 | } | |
776 | ||
777 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
778 | uint32_t mem_type, | |
9d87fa21 JG |
779 | bool interruptible, bool no_wait_reserve, |
780 | bool no_wait_gpu) | |
ca262a99 JG |
781 | { |
782 | struct ttm_bo_global *glob = bdev->glob; | |
783 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
784 | struct ttm_buffer_object *bo; | |
785 | int ret, put_count = 0; | |
ba4e7d97 | 786 | |
9c51ba1d | 787 | retry: |
a987fcaa | 788 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
789 | if (list_empty(&man->lru)) { |
790 | spin_unlock(&glob->lru_lock); | |
791 | return -EBUSY; | |
792 | } | |
793 | ||
ca262a99 JG |
794 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
795 | kref_get(&bo->list_kref); | |
9c51ba1d | 796 | |
e1efc9b6 TH |
797 | if (!list_empty(&bo->ddestroy)) { |
798 | spin_unlock(&glob->lru_lock); | |
799 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
800 | no_wait_reserve, no_wait_gpu); | |
801 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
802 | ||
803 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
804 | return ret; | |
805 | ||
806 | goto retry; | |
807 | } | |
808 | ||
9d87fa21 | 809 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
810 | |
811 | if (unlikely(ret == -EBUSY)) { | |
812 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 813 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
814 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
815 | ||
816 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
817 | ||
818 | /** | |
819 | * We *need* to retry after releasing the lru lock. | |
820 | */ | |
821 | ||
822 | if (unlikely(ret != 0)) | |
823 | return ret; | |
824 | goto retry; | |
825 | } | |
826 | ||
827 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 828 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
829 | |
830 | BUG_ON(ret != 0); | |
831 | ||
d6ea8886 | 832 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 833 | |
9d87fa21 | 834 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 835 | ttm_bo_unreserve(bo); |
9c51ba1d | 836 | |
ca262a99 | 837 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
838 | return ret; |
839 | } | |
840 | ||
42311ff9 BS |
841 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
842 | { | |
d961db75 | 843 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 844 | |
d961db75 BS |
845 | if (mem->mm_node) |
846 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
847 | } |
848 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
849 | ||
ba4e7d97 TH |
850 | /** |
851 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
852 | * space, or we've evicted everything and there isn't enough space. | |
853 | */ | |
ca262a99 JG |
854 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
855 | uint32_t mem_type, | |
856 | struct ttm_placement *placement, | |
857 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
858 | bool interruptible, |
859 | bool no_wait_reserve, | |
860 | bool no_wait_gpu) | |
ba4e7d97 | 861 | { |
ca262a99 | 862 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 863 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
864 | int ret; |
865 | ||
ba4e7d97 | 866 | do { |
d961db75 | 867 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
868 | if (unlikely(ret != 0)) |
869 | return ret; | |
d961db75 | 870 | if (mem->mm_node) |
ba4e7d97 | 871 | break; |
ca262a99 | 872 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 873 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
874 | if (unlikely(ret != 0)) |
875 | return ret; | |
ba4e7d97 | 876 | } while (1); |
d961db75 | 877 | if (mem->mm_node == NULL) |
ba4e7d97 | 878 | return -ENOMEM; |
ba4e7d97 TH |
879 | mem->mem_type = mem_type; |
880 | return 0; | |
881 | } | |
882 | ||
ae3e8122 TH |
883 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
884 | uint32_t cur_placement, | |
885 | uint32_t proposed_placement) | |
886 | { | |
887 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
888 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
889 | ||
890 | /** | |
891 | * Keep current caching if possible. | |
892 | */ | |
893 | ||
894 | if ((cur_placement & caching) != 0) | |
895 | result |= (cur_placement & caching); | |
896 | else if ((man->default_caching & caching) != 0) | |
897 | result |= man->default_caching; | |
898 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
899 | result |= TTM_PL_FLAG_CACHED; | |
900 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
901 | result |= TTM_PL_FLAG_WC; | |
902 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
903 | result |= TTM_PL_FLAG_UNCACHED; | |
904 | ||
905 | return result; | |
906 | } | |
907 | ||
ba4e7d97 TH |
908 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
909 | bool disallow_fixed, | |
910 | uint32_t mem_type, | |
ae3e8122 TH |
911 | uint32_t proposed_placement, |
912 | uint32_t *masked_placement) | |
ba4e7d97 TH |
913 | { |
914 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
915 | ||
916 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
917 | return false; | |
918 | ||
ae3e8122 | 919 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
920 | return false; |
921 | ||
ae3e8122 | 922 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 923 | return false; |
ba4e7d97 | 924 | |
ae3e8122 TH |
925 | cur_flags |= (proposed_placement & man->available_caching); |
926 | ||
927 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
928 | return true; |
929 | } | |
930 | ||
931 | /** | |
932 | * Creates space for memory region @mem according to its type. | |
933 | * | |
934 | * This function first searches for free space in compatible memory types in | |
935 | * the priority order defined by the driver. If free space isn't found, then | |
936 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
937 | * space. | |
938 | */ | |
939 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
940 | struct ttm_placement *placement, |
941 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
942 | bool interruptible, bool no_wait_reserve, |
943 | bool no_wait_gpu) | |
ba4e7d97 TH |
944 | { |
945 | struct ttm_bo_device *bdev = bo->bdev; | |
946 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
947 | uint32_t mem_type = TTM_PL_SYSTEM; |
948 | uint32_t cur_flags = 0; | |
949 | bool type_found = false; | |
950 | bool type_ok = false; | |
98ffc415 | 951 | bool has_erestartsys = false; |
ca262a99 | 952 | int i, ret; |
ba4e7d97 TH |
953 | |
954 | mem->mm_node = NULL; | |
b6637526 | 955 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
956 | ret = ttm_mem_type_from_flags(placement->placement[i], |
957 | &mem_type); | |
958 | if (ret) | |
959 | return ret; | |
ba4e7d97 TH |
960 | man = &bdev->man[mem_type]; |
961 | ||
962 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
963 | bo->type == ttm_bo_type_user, |
964 | mem_type, | |
965 | placement->placement[i], | |
966 | &cur_flags); | |
ba4e7d97 TH |
967 | |
968 | if (!type_ok) | |
969 | continue; | |
970 | ||
ae3e8122 TH |
971 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
972 | cur_flags); | |
ca262a99 JG |
973 | /* |
974 | * Use the access and other non-mapping-related flag bits from | |
975 | * the memory placement flags to the current flags | |
976 | */ | |
977 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
978 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 979 | |
ba4e7d97 TH |
980 | if (mem_type == TTM_PL_SYSTEM) |
981 | break; | |
982 | ||
983 | if (man->has_type && man->use_type) { | |
984 | type_found = true; | |
d961db75 | 985 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
986 | if (unlikely(ret)) |
987 | return ret; | |
ba4e7d97 | 988 | } |
d961db75 | 989 | if (mem->mm_node) |
ba4e7d97 TH |
990 | break; |
991 | } | |
992 | ||
d961db75 | 993 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
994 | mem->mem_type = mem_type; |
995 | mem->placement = cur_flags; | |
996 | return 0; | |
997 | } | |
998 | ||
999 | if (!type_found) | |
1000 | return -EINVAL; | |
1001 | ||
b6637526 DA |
1002 | for (i = 0; i < placement->num_busy_placement; ++i) { |
1003 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
1004 | &mem_type); |
1005 | if (ret) | |
1006 | return ret; | |
ba4e7d97 | 1007 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1008 | if (!man->has_type) |
1009 | continue; | |
ba4e7d97 | 1010 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
1011 | bo->type == ttm_bo_type_user, |
1012 | mem_type, | |
b6637526 | 1013 | placement->busy_placement[i], |
ca262a99 | 1014 | &cur_flags)) |
ba4e7d97 TH |
1015 | continue; |
1016 | ||
ae3e8122 TH |
1017 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1018 | cur_flags); | |
ca262a99 JG |
1019 | /* |
1020 | * Use the access and other non-mapping-related flag bits from | |
1021 | * the memory placement flags to the current flags | |
1022 | */ | |
b6637526 | 1023 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 1024 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1025 | |
0eaddb28 TH |
1026 | |
1027 | if (mem_type == TTM_PL_SYSTEM) { | |
1028 | mem->mem_type = mem_type; | |
1029 | mem->placement = cur_flags; | |
1030 | mem->mm_node = NULL; | |
1031 | return 0; | |
1032 | } | |
1033 | ||
ca262a99 | 1034 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1035 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1036 | if (ret == 0 && mem->mm_node) { |
1037 | mem->placement = cur_flags; | |
1038 | return 0; | |
1039 | } | |
98ffc415 TH |
1040 | if (ret == -ERESTARTSYS) |
1041 | has_erestartsys = true; | |
ba4e7d97 | 1042 | } |
98ffc415 | 1043 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1044 | return ret; |
1045 | } | |
1046 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1047 | ||
1048 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1049 | { | |
ba4e7d97 TH |
1050 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1051 | return -EBUSY; | |
1052 | ||
98ffc415 TH |
1053 | return wait_event_interruptible(bo->event_queue, |
1054 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1055 | } |
d1ede145 | 1056 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1057 | |
1058 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1059 | struct ttm_placement *placement, |
9d87fa21 JG |
1060 | bool interruptible, bool no_wait_reserve, |
1061 | bool no_wait_gpu) | |
ba4e7d97 | 1062 | { |
ba4e7d97 TH |
1063 | int ret = 0; |
1064 | struct ttm_mem_reg mem; | |
702adba2 | 1065 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1066 | |
1067 | BUG_ON(!atomic_read(&bo->reserved)); | |
1068 | ||
1069 | /* | |
1070 | * FIXME: It's possible to pipeline buffer moves. | |
1071 | * Have the driver move function wait for idle when necessary, | |
1072 | * instead of doing it here. | |
1073 | */ | |
702adba2 | 1074 | spin_lock(&bdev->fence_lock); |
9d87fa21 | 1075 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 1076 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1077 | if (ret) |
1078 | return ret; | |
ba4e7d97 TH |
1079 | mem.num_pages = bo->num_pages; |
1080 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1081 | mem.page_alignment = bo->mem.page_alignment; | |
eba67093 TH |
1082 | mem.bus.io_reserved_vm = false; |
1083 | mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1084 | /* |
1085 | * Determine where to move the buffer. | |
1086 | */ | |
9d87fa21 | 1087 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1088 | if (ret) |
1089 | goto out_unlock; | |
9d87fa21 | 1090 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1091 | out_unlock: |
d961db75 BS |
1092 | if (ret && mem.mm_node) |
1093 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1094 | return ret; |
1095 | } | |
1096 | ||
ca262a99 | 1097 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1098 | struct ttm_mem_reg *mem) |
1099 | { | |
ca262a99 | 1100 | int i; |
e22238ea | 1101 | |
d961db75 BS |
1102 | if (mem->mm_node && placement->lpfn != 0 && |
1103 | (mem->start < placement->fpfn || | |
1104 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1105 | return -1; |
ca262a99 JG |
1106 | |
1107 | for (i = 0; i < placement->num_placement; i++) { | |
1108 | if ((placement->placement[i] & mem->placement & | |
1109 | TTM_PL_MASK_CACHING) && | |
1110 | (placement->placement[i] & mem->placement & | |
1111 | TTM_PL_MASK_MEM)) | |
1112 | return i; | |
1113 | } | |
1114 | return -1; | |
ba4e7d97 TH |
1115 | } |
1116 | ||
09855acb JG |
1117 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1118 | struct ttm_placement *placement, | |
9d87fa21 JG |
1119 | bool interruptible, bool no_wait_reserve, |
1120 | bool no_wait_gpu) | |
ba4e7d97 TH |
1121 | { |
1122 | int ret; | |
1123 | ||
1124 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1125 | /* Check that range is valid */ |
1126 | if (placement->lpfn || placement->fpfn) | |
1127 | if (placement->fpfn > placement->lpfn || | |
1128 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1129 | return -EINVAL; | |
ba4e7d97 TH |
1130 | /* |
1131 | * Check whether we need to move buffer. | |
1132 | */ | |
ca262a99 JG |
1133 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1134 | if (ret < 0) { | |
9d87fa21 | 1135 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1136 | if (ret) |
ba4e7d97 | 1137 | return ret; |
ca262a99 JG |
1138 | } else { |
1139 | /* | |
1140 | * Use the access and other non-mapping-related flag bits from | |
1141 | * the compatible memory placement flags to the active flags | |
1142 | */ | |
1143 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1144 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1145 | } |
ba4e7d97 TH |
1146 | /* |
1147 | * We might need to add a TTM. | |
1148 | */ | |
ba4e7d97 TH |
1149 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1150 | ret = ttm_bo_add_ttm(bo, true); | |
1151 | if (ret) | |
1152 | return ret; | |
1153 | } | |
ba4e7d97 TH |
1154 | return 0; |
1155 | } | |
09855acb | 1156 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1157 | |
09855acb JG |
1158 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1159 | struct ttm_placement *placement) | |
ba4e7d97 | 1160 | { |
29e190e0 TH |
1161 | BUG_ON((placement->fpfn || placement->lpfn) && |
1162 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1163 | |
ba4e7d97 TH |
1164 | return 0; |
1165 | } | |
1166 | ||
09855acb JG |
1167 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1168 | struct ttm_buffer_object *bo, | |
1169 | unsigned long size, | |
1170 | enum ttm_bo_type type, | |
1171 | struct ttm_placement *placement, | |
1172 | uint32_t page_alignment, | |
1173 | unsigned long buffer_start, | |
1174 | bool interruptible, | |
5df23979 | 1175 | struct file *persistent_swap_storage, |
09855acb JG |
1176 | size_t acc_size, |
1177 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1178 | { |
09855acb | 1179 | int ret = 0; |
ba4e7d97 TH |
1180 | unsigned long num_pages; |
1181 | ||
1182 | size += buffer_start & ~PAGE_MASK; | |
1183 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1184 | if (num_pages == 0) { | |
1185 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
7dfbbdcf TH |
1186 | if (destroy) |
1187 | (*destroy)(bo); | |
1188 | else | |
1189 | kfree(bo); | |
ba4e7d97 TH |
1190 | return -EINVAL; |
1191 | } | |
1192 | bo->destroy = destroy; | |
1193 | ||
ba4e7d97 TH |
1194 | kref_init(&bo->kref); |
1195 | kref_init(&bo->list_kref); | |
1196 | atomic_set(&bo->cpu_writers, 0); | |
1197 | atomic_set(&bo->reserved, 1); | |
1198 | init_waitqueue_head(&bo->event_queue); | |
1199 | INIT_LIST_HEAD(&bo->lru); | |
1200 | INIT_LIST_HEAD(&bo->ddestroy); | |
1201 | INIT_LIST_HEAD(&bo->swap); | |
eba67093 | 1202 | INIT_LIST_HEAD(&bo->io_reserve_lru); |
ba4e7d97 | 1203 | bo->bdev = bdev; |
a987fcaa | 1204 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1205 | bo->type = type; |
1206 | bo->num_pages = num_pages; | |
eb6d2c39 | 1207 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1208 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1209 | bo->mem.num_pages = bo->num_pages; | |
1210 | bo->mem.mm_node = NULL; | |
1211 | bo->mem.page_alignment = page_alignment; | |
eba67093 TH |
1212 | bo->mem.bus.io_reserved_vm = false; |
1213 | bo->mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1214 | bo->buffer_start = buffer_start & PAGE_MASK; |
1215 | bo->priv_flags = 0; | |
1216 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1217 | bo->seq_valid = false; | |
5df23979 | 1218 | bo->persistent_swap_storage = persistent_swap_storage; |
ba4e7d97 | 1219 | bo->acc_size = acc_size; |
a987fcaa | 1220 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1221 | |
09855acb | 1222 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1223 | if (unlikely(ret != 0)) |
1224 | goto out_err; | |
1225 | ||
ba4e7d97 TH |
1226 | /* |
1227 | * For ttm_bo_type_device buffers, allocate | |
1228 | * address space from the device. | |
1229 | */ | |
ba4e7d97 TH |
1230 | if (bo->type == ttm_bo_type_device) { |
1231 | ret = ttm_bo_setup_vm(bo); | |
1232 | if (ret) | |
1233 | goto out_err; | |
1234 | } | |
1235 | ||
9d87fa21 | 1236 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1237 | if (ret) |
1238 | goto out_err; | |
1239 | ||
1240 | ttm_bo_unreserve(bo); | |
1241 | return 0; | |
1242 | ||
1243 | out_err: | |
1244 | ttm_bo_unreserve(bo); | |
1245 | ttm_bo_unref(&bo); | |
1246 | ||
1247 | return ret; | |
1248 | } | |
09855acb | 1249 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1250 | |
a987fcaa | 1251 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1252 | unsigned long num_pages) |
1253 | { | |
1254 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1255 | PAGE_MASK; | |
1256 | ||
a987fcaa | 1257 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1258 | } |
1259 | ||
09855acb JG |
1260 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1261 | unsigned long size, | |
1262 | enum ttm_bo_type type, | |
1263 | struct ttm_placement *placement, | |
1264 | uint32_t page_alignment, | |
1265 | unsigned long buffer_start, | |
1266 | bool interruptible, | |
5df23979 | 1267 | struct file *persistent_swap_storage, |
09855acb | 1268 | struct ttm_buffer_object **p_bo) |
ba4e7d97 TH |
1269 | { |
1270 | struct ttm_buffer_object *bo; | |
a987fcaa | 1271 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1272 | int ret; |
ba4e7d97 TH |
1273 | |
1274 | size_t acc_size = | |
a987fcaa | 1275 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1276 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1277 | if (unlikely(ret != 0)) |
1278 | return ret; | |
1279 | ||
1280 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1281 | ||
1282 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1283 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1284 | return -ENOMEM; |
1285 | } | |
1286 | ||
09855acb JG |
1287 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1288 | buffer_start, interruptible, | |
5df23979 | 1289 | persistent_swap_storage, acc_size, NULL); |
ba4e7d97 TH |
1290 | if (likely(ret == 0)) |
1291 | *p_bo = bo; | |
1292 | ||
1293 | return ret; | |
1294 | } | |
1295 | ||
ba4e7d97 | 1296 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1297 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1298 | { |
ca262a99 | 1299 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1300 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1301 | int ret; |
ba4e7d97 TH |
1302 | |
1303 | /* | |
1304 | * Can't use standard list traversal since we're unlocking. | |
1305 | */ | |
1306 | ||
a987fcaa | 1307 | spin_lock(&glob->lru_lock); |
ca262a99 | 1308 | while (!list_empty(&man->lru)) { |
a987fcaa | 1309 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1310 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1311 | if (ret) { |
1312 | if (allow_errors) { | |
1313 | return ret; | |
1314 | } else { | |
1315 | printk(KERN_ERR TTM_PFX | |
1316 | "Cleanup eviction failed\n"); | |
1317 | } | |
1318 | } | |
a987fcaa | 1319 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1320 | } |
a987fcaa | 1321 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1322 | return 0; |
1323 | } | |
1324 | ||
1325 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1326 | { | |
c96e7c7a | 1327 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1328 | int ret = -EINVAL; |
1329 | ||
1330 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1331 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1332 | return ret; | |
1333 | } | |
c96e7c7a | 1334 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1335 | |
1336 | if (!man->has_type) { | |
1337 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1338 | "memory manager type %u\n", mem_type); | |
1339 | return ret; | |
1340 | } | |
1341 | ||
1342 | man->use_type = false; | |
1343 | man->has_type = false; | |
1344 | ||
1345 | ret = 0; | |
1346 | if (mem_type > 0) { | |
ca262a99 | 1347 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1348 | |
d961db75 | 1349 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1350 | } |
1351 | ||
1352 | return ret; | |
1353 | } | |
1354 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1355 | ||
1356 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1357 | { | |
1358 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1359 | ||
1360 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1361 | printk(KERN_ERR TTM_PFX | |
1362 | "Illegal memory manager memory type %u.\n", | |
1363 | mem_type); | |
1364 | return -EINVAL; | |
1365 | } | |
1366 | ||
1367 | if (!man->has_type) { | |
1368 | printk(KERN_ERR TTM_PFX | |
1369 | "Memory type %u has not been initialized.\n", | |
1370 | mem_type); | |
1371 | return 0; | |
1372 | } | |
1373 | ||
ca262a99 | 1374 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1375 | } |
1376 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1377 | ||
1378 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1379 | unsigned long p_size) |
ba4e7d97 TH |
1380 | { |
1381 | int ret = -EINVAL; | |
1382 | struct ttm_mem_type_manager *man; | |
1383 | ||
dbc4a5b8 | 1384 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1385 | man = &bdev->man[type]; |
dbc4a5b8 | 1386 | BUG_ON(man->has_type); |
eba67093 TH |
1387 | man->io_reserve_fastpath = true; |
1388 | man->use_io_reserve_lru = false; | |
1389 | mutex_init(&man->io_reserve_mutex); | |
1390 | INIT_LIST_HEAD(&man->io_reserve_lru); | |
ba4e7d97 TH |
1391 | |
1392 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1393 | if (ret) | |
1394 | return ret; | |
d961db75 | 1395 | man->bdev = bdev; |
ba4e7d97 TH |
1396 | |
1397 | ret = 0; | |
1398 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1399 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1400 | if (ret) |
1401 | return ret; | |
1402 | } | |
1403 | man->has_type = true; | |
1404 | man->use_type = true; | |
1405 | man->size = p_size; | |
1406 | ||
1407 | INIT_LIST_HEAD(&man->lru); | |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1412 | ||
a987fcaa TH |
1413 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1414 | { | |
1415 | struct ttm_bo_global *glob = | |
1416 | container_of(kobj, struct ttm_bo_global, kobj); | |
1417 | ||
a987fcaa TH |
1418 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1419 | __free_page(glob->dummy_read_page); | |
1420 | kfree(glob); | |
1421 | } | |
1422 | ||
ba4420c2 | 1423 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1424 | { |
1425 | struct ttm_bo_global *glob = ref->object; | |
1426 | ||
1427 | kobject_del(&glob->kobj); | |
1428 | kobject_put(&glob->kobj); | |
1429 | } | |
1430 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1431 | ||
ba4420c2 | 1432 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1433 | { |
1434 | struct ttm_bo_global_ref *bo_ref = | |
1435 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1436 | struct ttm_bo_global *glob = ref->object; | |
1437 | int ret; | |
1438 | ||
1439 | mutex_init(&glob->device_list_mutex); | |
1440 | spin_lock_init(&glob->lru_lock); | |
1441 | glob->mem_glob = bo_ref->mem_glob; | |
1442 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1443 | ||
1444 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1445 | ret = -ENOMEM; | |
1446 | goto out_no_drp; | |
1447 | } | |
1448 | ||
1449 | INIT_LIST_HEAD(&glob->swap_lru); | |
1450 | INIT_LIST_HEAD(&glob->device_list); | |
1451 | ||
1452 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1453 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1454 | if (unlikely(ret != 0)) { | |
1455 | printk(KERN_ERR TTM_PFX | |
1456 | "Could not register buffer object swapout.\n"); | |
1457 | goto out_no_shrink; | |
1458 | } | |
1459 | ||
1460 | glob->ttm_bo_extra_size = | |
1461 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1462 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1463 | ||
1464 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1465 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1466 | ||
1467 | atomic_set(&glob->bo_count, 0); | |
1468 | ||
b642ed06 RD |
1469 | ret = kobject_init_and_add( |
1470 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1471 | if (unlikely(ret != 0)) |
1472 | kobject_put(&glob->kobj); | |
1473 | return ret; | |
1474 | out_no_shrink: | |
1475 | __free_page(glob->dummy_read_page); | |
1476 | out_no_drp: | |
1477 | kfree(glob); | |
1478 | return ret; | |
1479 | } | |
1480 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1481 | ||
1482 | ||
ba4e7d97 TH |
1483 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1484 | { | |
1485 | int ret = 0; | |
1486 | unsigned i = TTM_NUM_MEM_TYPES; | |
1487 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1488 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1489 | |
1490 | while (i--) { | |
1491 | man = &bdev->man[i]; | |
1492 | if (man->has_type) { | |
1493 | man->use_type = false; | |
1494 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1495 | ret = -EBUSY; | |
1496 | printk(KERN_ERR TTM_PFX | |
1497 | "DRM memory manager type %d " | |
1498 | "is not clean.\n", i); | |
1499 | } | |
1500 | man->has_type = false; | |
1501 | } | |
1502 | } | |
1503 | ||
a987fcaa TH |
1504 | mutex_lock(&glob->device_list_mutex); |
1505 | list_del(&bdev->device_list); | |
1506 | mutex_unlock(&glob->device_list_mutex); | |
1507 | ||
f094cfc6 | 1508 | cancel_delayed_work_sync(&bdev->wq); |
ba4e7d97 TH |
1509 | |
1510 | while (ttm_bo_delayed_delete(bdev, true)) | |
1511 | ; | |
1512 | ||
a987fcaa | 1513 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1514 | if (list_empty(&bdev->ddestroy)) |
1515 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1516 | ||
1517 | if (list_empty(&bdev->man[0].lru)) | |
1518 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1519 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1520 | |
ba4e7d97 TH |
1521 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1522 | write_lock(&bdev->vm_lock); | |
1523 | drm_mm_takedown(&bdev->addr_space_mm); | |
1524 | write_unlock(&bdev->vm_lock); | |
1525 | ||
ba4e7d97 TH |
1526 | return ret; |
1527 | } | |
1528 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1529 | ||
ba4e7d97 | 1530 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1531 | struct ttm_bo_global *glob, |
1532 | struct ttm_bo_driver *driver, | |
51c8b407 | 1533 | uint64_t file_page_offset, |
ad49f501 | 1534 | bool need_dma32) |
ba4e7d97 TH |
1535 | { |
1536 | int ret = -EINVAL; | |
1537 | ||
ba4e7d97 | 1538 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1539 | bdev->driver = driver; |
ba4e7d97 TH |
1540 | |
1541 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1542 | ||
ba4e7d97 TH |
1543 | /* |
1544 | * Initialize the system memory buffer type. | |
1545 | * Other types need to be driver / IOCTL initialized. | |
1546 | */ | |
ca262a99 | 1547 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1548 | if (unlikely(ret != 0)) |
a987fcaa | 1549 | goto out_no_sys; |
ba4e7d97 TH |
1550 | |
1551 | bdev->addr_space_rb = RB_ROOT; | |
1552 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1553 | if (unlikely(ret != 0)) | |
a987fcaa | 1554 | goto out_no_addr_mm; |
ba4e7d97 TH |
1555 | |
1556 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1557 | bdev->nice_mode = true; | |
1558 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1559 | bdev->dev_mapping = NULL; |
a987fcaa | 1560 | bdev->glob = glob; |
ad49f501 | 1561 | bdev->need_dma32 = need_dma32; |
65705962 | 1562 | bdev->val_seq = 0; |
702adba2 | 1563 | spin_lock_init(&bdev->fence_lock); |
a987fcaa TH |
1564 | mutex_lock(&glob->device_list_mutex); |
1565 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1566 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1567 | |
1568 | return 0; | |
a987fcaa | 1569 | out_no_addr_mm: |
ba4e7d97 | 1570 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1571 | out_no_sys: |
ba4e7d97 TH |
1572 | return ret; |
1573 | } | |
1574 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1575 | ||
1576 | /* | |
1577 | * buffer object vm functions. | |
1578 | */ | |
1579 | ||
1580 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1581 | { | |
1582 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1583 | ||
1584 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1585 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1586 | return false; | |
1587 | ||
1588 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1589 | return false; | |
1590 | ||
1591 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1592 | return false; | |
1593 | } | |
1594 | return true; | |
1595 | } | |
1596 | ||
eba67093 | 1597 | void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
1598 | { |
1599 | struct ttm_bo_device *bdev = bo->bdev; | |
1600 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1601 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1602 | ||
1603 | if (!bdev->dev_mapping) | |
1604 | return; | |
ba4e7d97 | 1605 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
eba67093 | 1606 | ttm_mem_io_free_vm(bo); |
ba4e7d97 | 1607 | } |
eba67093 TH |
1608 | |
1609 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1610 | { | |
1611 | struct ttm_bo_device *bdev = bo->bdev; | |
1612 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; | |
1613 | ||
1614 | ttm_mem_io_lock(man, false); | |
1615 | ttm_bo_unmap_virtual_locked(bo); | |
1616 | ttm_mem_io_unlock(man); | |
ba4e7d97 | 1617 | } |
eba67093 TH |
1618 | |
1619 | ||
e024e110 | 1620 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1621 | |
1622 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1623 | { | |
1624 | struct ttm_bo_device *bdev = bo->bdev; | |
1625 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1626 | struct rb_node *parent = NULL; | |
1627 | struct ttm_buffer_object *cur_bo; | |
1628 | unsigned long offset = bo->vm_node->start; | |
1629 | unsigned long cur_offset; | |
1630 | ||
1631 | while (*cur) { | |
1632 | parent = *cur; | |
1633 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1634 | cur_offset = cur_bo->vm_node->start; | |
1635 | if (offset < cur_offset) | |
1636 | cur = &parent->rb_left; | |
1637 | else if (offset > cur_offset) | |
1638 | cur = &parent->rb_right; | |
1639 | else | |
1640 | BUG(); | |
1641 | } | |
1642 | ||
1643 | rb_link_node(&bo->vm_rb, parent, cur); | |
1644 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1645 | } | |
1646 | ||
1647 | /** | |
1648 | * ttm_bo_setup_vm: | |
1649 | * | |
1650 | * @bo: the buffer to allocate address space for | |
1651 | * | |
1652 | * Allocate address space in the drm device so that applications | |
1653 | * can mmap the buffer and access the contents. This only | |
1654 | * applies to ttm_bo_type_device objects as others are not | |
1655 | * placed in the drm device address space. | |
1656 | */ | |
1657 | ||
1658 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1659 | { | |
1660 | struct ttm_bo_device *bdev = bo->bdev; | |
1661 | int ret; | |
1662 | ||
1663 | retry_pre_get: | |
1664 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1665 | if (unlikely(ret != 0)) | |
1666 | return ret; | |
1667 | ||
1668 | write_lock(&bdev->vm_lock); | |
1669 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1670 | bo->mem.num_pages, 0, 0); | |
1671 | ||
1672 | if (unlikely(bo->vm_node == NULL)) { | |
1673 | ret = -ENOMEM; | |
1674 | goto out_unlock; | |
1675 | } | |
1676 | ||
1677 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1678 | bo->mem.num_pages, 0); | |
1679 | ||
1680 | if (unlikely(bo->vm_node == NULL)) { | |
1681 | write_unlock(&bdev->vm_lock); | |
1682 | goto retry_pre_get; | |
1683 | } | |
1684 | ||
1685 | ttm_bo_vm_insert_rb(bo); | |
1686 | write_unlock(&bdev->vm_lock); | |
1687 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1688 | ||
1689 | return 0; | |
1690 | out_unlock: | |
1691 | write_unlock(&bdev->vm_lock); | |
1692 | return ret; | |
1693 | } | |
1694 | ||
1695 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1696 | bool lazy, bool interruptible, bool no_wait) | |
1697 | { | |
1698 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
702adba2 | 1699 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1700 | void *sync_obj; |
1701 | void *sync_obj_arg; | |
1702 | int ret = 0; | |
1703 | ||
1704 | if (likely(bo->sync_obj == NULL)) | |
1705 | return 0; | |
1706 | ||
1707 | while (bo->sync_obj) { | |
1708 | ||
1709 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1710 | void *tmp_obj = bo->sync_obj; | |
1711 | bo->sync_obj = NULL; | |
1712 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
702adba2 | 1713 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 1714 | driver->sync_obj_unref(&tmp_obj); |
702adba2 | 1715 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1716 | continue; |
1717 | } | |
1718 | ||
1719 | if (no_wait) | |
1720 | return -EBUSY; | |
1721 | ||
1722 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1723 | sync_obj_arg = bo->sync_obj_arg; | |
702adba2 | 1724 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1725 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, |
1726 | lazy, interruptible); | |
1727 | if (unlikely(ret != 0)) { | |
1728 | driver->sync_obj_unref(&sync_obj); | |
702adba2 | 1729 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1730 | return ret; |
1731 | } | |
702adba2 | 1732 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1733 | if (likely(bo->sync_obj == sync_obj && |
1734 | bo->sync_obj_arg == sync_obj_arg)) { | |
1735 | void *tmp_obj = bo->sync_obj; | |
1736 | bo->sync_obj = NULL; | |
1737 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1738 | &bo->priv_flags); | |
702adba2 | 1739 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1740 | driver->sync_obj_unref(&sync_obj); |
1741 | driver->sync_obj_unref(&tmp_obj); | |
702adba2 | 1742 | spin_lock(&bdev->fence_lock); |
fee280d3 | 1743 | } else { |
702adba2 | 1744 | spin_unlock(&bdev->fence_lock); |
fee280d3 | 1745 | driver->sync_obj_unref(&sync_obj); |
702adba2 | 1746 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1747 | } |
1748 | } | |
1749 | return 0; | |
1750 | } | |
1751 | EXPORT_SYMBOL(ttm_bo_wait); | |
1752 | ||
ba4e7d97 TH |
1753 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1754 | { | |
702adba2 | 1755 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1756 | int ret = 0; |
1757 | ||
1758 | /* | |
8cfe92d6 | 1759 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1760 | */ |
1761 | ||
1762 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1763 | if (unlikely(ret != 0)) | |
1764 | return ret; | |
702adba2 | 1765 | spin_lock(&bdev->fence_lock); |
ba4e7d97 | 1766 | ret = ttm_bo_wait(bo, false, true, no_wait); |
702adba2 | 1767 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1768 | if (likely(ret == 0)) |
1769 | atomic_inc(&bo->cpu_writers); | |
1770 | ttm_bo_unreserve(bo); | |
1771 | return ret; | |
1772 | } | |
d1ede145 | 1773 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1774 | |
1775 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1776 | { | |
1777 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1778 | wake_up_all(&bo->event_queue); | |
1779 | } | |
d1ede145 | 1780 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1781 | |
1782 | /** | |
1783 | * A buffer object shrink method that tries to swap out the first | |
1784 | * buffer object on the bo_global::swap_lru list. | |
1785 | */ | |
1786 | ||
1787 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1788 | { | |
a987fcaa TH |
1789 | struct ttm_bo_global *glob = |
1790 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1791 | struct ttm_buffer_object *bo; |
1792 | int ret = -EBUSY; | |
1793 | int put_count; | |
1794 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1795 | ||
a987fcaa | 1796 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1797 | while (ret == -EBUSY) { |
a987fcaa TH |
1798 | if (unlikely(list_empty(&glob->swap_lru))) { |
1799 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1800 | return -EBUSY; |
1801 | } | |
1802 | ||
a987fcaa | 1803 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1804 | struct ttm_buffer_object, swap); |
1805 | kref_get(&bo->list_kref); | |
1806 | ||
e1efc9b6 TH |
1807 | if (!list_empty(&bo->ddestroy)) { |
1808 | spin_unlock(&glob->lru_lock); | |
1809 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1810 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1811 | continue; | |
1812 | } | |
1813 | ||
ba4e7d97 TH |
1814 | /** |
1815 | * Reserve buffer. Since we unlock while sleeping, we need | |
1816 | * to re-check that nobody removed us from the swap-list while | |
1817 | * we slept. | |
1818 | */ | |
1819 | ||
1820 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1821 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1822 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1823 | ttm_bo_wait_unreserved(bo, false); |
1824 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1825 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1826 | } |
1827 | } | |
1828 | ||
1829 | BUG_ON(ret != 0); | |
1830 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1831 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1832 | |
d6ea8886 | 1833 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
1834 | |
1835 | /** | |
1836 | * Wait for GPU, then move to system cached. | |
1837 | */ | |
1838 | ||
702adba2 | 1839 | spin_lock(&bo->bdev->fence_lock); |
ba4e7d97 | 1840 | ret = ttm_bo_wait(bo, false, false, false); |
702adba2 | 1841 | spin_unlock(&bo->bdev->fence_lock); |
ba4e7d97 TH |
1842 | |
1843 | if (unlikely(ret != 0)) | |
1844 | goto out; | |
1845 | ||
1846 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1847 | struct ttm_mem_reg evict_mem; | |
1848 | ||
1849 | evict_mem = bo->mem; | |
1850 | evict_mem.mm_node = NULL; | |
1851 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1852 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1853 | ||
1854 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1855 | false, false, false); |
ba4e7d97 TH |
1856 | if (unlikely(ret != 0)) |
1857 | goto out; | |
1858 | } | |
1859 | ||
1860 | ttm_bo_unmap_virtual(bo); | |
1861 | ||
1862 | /** | |
1863 | * Swap out. Buffer will be swapped in again as soon as | |
1864 | * anyone tries to access a ttm page. | |
1865 | */ | |
1866 | ||
3f09ea4e TH |
1867 | if (bo->bdev->driver->swap_notify) |
1868 | bo->bdev->driver->swap_notify(bo); | |
1869 | ||
5df23979 | 1870 | ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); |
ba4e7d97 TH |
1871 | out: |
1872 | ||
1873 | /** | |
1874 | * | |
1875 | * Unreserve without putting on LRU to avoid swapping out an | |
1876 | * already swapped buffer. | |
1877 | */ | |
1878 | ||
1879 | atomic_set(&bo->reserved, 0); | |
1880 | wake_up_all(&bo->event_queue); | |
1881 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1882 | return ret; | |
1883 | } | |
1884 | ||
1885 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1886 | { | |
a987fcaa | 1887 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1888 | ; |
1889 | } | |
e99e1e78 | 1890 | EXPORT_SYMBOL(ttm_bo_swapout_all); |