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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 | 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 | */ | |
ba4e7d97 TH |
226 | if (use_sequence && bo->seq_valid && |
227 | (sequence - bo->val_seq < (1 << 31))) { | |
228 | return -EAGAIN; | |
229 | } | |
230 | ||
231 | if (no_wait) | |
232 | return -EBUSY; | |
233 | ||
a987fcaa | 234 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 235 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 236 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
237 | |
238 | if (unlikely(ret)) | |
239 | return ret; | |
240 | } | |
241 | ||
242 | if (use_sequence) { | |
95ccb0f3 TH |
243 | /** |
244 | * Wake up waiters that may need to recheck for deadlock, | |
245 | * if we decreased the sequence number. | |
246 | */ | |
247 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
248 | || !bo->seq_valid)) | |
249 | wake_up_all(&bo->event_queue); | |
250 | ||
ba4e7d97 TH |
251 | bo->val_seq = sequence; |
252 | bo->seq_valid = true; | |
253 | } else { | |
254 | bo->seq_valid = false; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | EXPORT_SYMBOL(ttm_bo_reserve); | |
260 | ||
261 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
262 | { | |
263 | BUG(); | |
264 | } | |
265 | ||
d6ea8886 DA |
266 | void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
267 | bool never_free) | |
268 | { | |
269 | while (count--) | |
270 | kref_put(&bo->list_kref, | |
271 | (never_free || (count >= 0)) ? ttm_bo_ref_bug : | |
272 | ttm_bo_release_list); | |
273 | } | |
274 | ||
ba4e7d97 TH |
275 | int ttm_bo_reserve(struct ttm_buffer_object *bo, |
276 | bool interruptible, | |
277 | bool no_wait, bool use_sequence, uint32_t sequence) | |
278 | { | |
a987fcaa | 279 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
280 | int put_count = 0; |
281 | int ret; | |
282 | ||
a987fcaa | 283 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
284 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
285 | sequence); | |
286 | if (likely(ret == 0)) | |
287 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 288 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 289 | |
d6ea8886 | 290 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
291 | |
292 | return ret; | |
293 | } | |
294 | ||
295 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) | |
296 | { | |
a987fcaa | 297 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 298 | |
a987fcaa | 299 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
300 | ttm_bo_add_to_lru(bo); |
301 | atomic_set(&bo->reserved, 0); | |
302 | wake_up_all(&bo->event_queue); | |
a987fcaa | 303 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
304 | } |
305 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
306 | ||
307 | /* | |
308 | * Call bo->mutex locked. | |
309 | */ | |
ba4e7d97 TH |
310 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
311 | { | |
312 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 313 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
314 | int ret = 0; |
315 | uint32_t page_flags = 0; | |
316 | ||
317 | TTM_ASSERT_LOCKED(&bo->mutex); | |
318 | bo->ttm = NULL; | |
319 | ||
ad49f501 DA |
320 | if (bdev->need_dma32) |
321 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
322 | ||
ba4e7d97 TH |
323 | switch (bo->type) { |
324 | case ttm_bo_type_device: | |
325 | if (zero_alloc) | |
326 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
327 | case ttm_bo_type_kernel: | |
328 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
a987fcaa | 329 | page_flags, glob->dummy_read_page); |
ba4e7d97 TH |
330 | if (unlikely(bo->ttm == NULL)) |
331 | ret = -ENOMEM; | |
332 | break; | |
333 | case ttm_bo_type_user: | |
334 | bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, | |
335 | page_flags | TTM_PAGE_FLAG_USER, | |
a987fcaa | 336 | glob->dummy_read_page); |
447aeb90 | 337 | if (unlikely(bo->ttm == NULL)) { |
ba4e7d97 | 338 | ret = -ENOMEM; |
447aeb90 DA |
339 | break; |
340 | } | |
ba4e7d97 TH |
341 | |
342 | ret = ttm_tt_set_user(bo->ttm, current, | |
343 | bo->buffer_start, bo->num_pages); | |
344 | if (unlikely(ret != 0)) | |
345 | ttm_tt_destroy(bo->ttm); | |
346 | break; | |
347 | default: | |
348 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
349 | ret = -EINVAL; | |
350 | break; | |
351 | } | |
352 | ||
353 | return ret; | |
354 | } | |
355 | ||
356 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
357 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
358 | bool evict, bool interruptible, |
359 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
360 | { |
361 | struct ttm_bo_device *bdev = bo->bdev; | |
362 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
363 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
364 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
365 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
366 | int ret = 0; | |
367 | ||
368 | if (old_is_pci || new_is_pci || | |
369 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) | |
370 | ttm_bo_unmap_virtual(bo); | |
371 | ||
372 | /* | |
373 | * Create and bind a ttm if required. | |
374 | */ | |
375 | ||
376 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) { | |
377 | ret = ttm_bo_add_ttm(bo, false); | |
378 | if (ret) | |
379 | goto out_err; | |
380 | ||
381 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
382 | if (ret) | |
87ef9209 | 383 | goto out_err; |
ba4e7d97 TH |
384 | |
385 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
386 | ret = ttm_tt_bind(bo->ttm, mem); | |
387 | if (ret) | |
388 | goto out_err; | |
389 | } | |
390 | ||
391 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
ca262a99 | 392 | bo->mem = *mem; |
ba4e7d97 | 393 | mem->mm_node = NULL; |
ba4e7d97 TH |
394 | goto moved; |
395 | } | |
396 | ||
397 | } | |
398 | ||
e024e110 DA |
399 | if (bdev->driver->move_notify) |
400 | bdev->driver->move_notify(bo, mem); | |
401 | ||
ba4e7d97 TH |
402 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && |
403 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 404 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
405 | else if (bdev->driver->move) |
406 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 407 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 408 | else |
9d87fa21 | 409 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
410 | |
411 | if (ret) | |
412 | goto out_err; | |
413 | ||
414 | moved: | |
415 | if (bo->evicted) { | |
416 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
417 | if (ret) | |
418 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
419 | bo->evicted = false; | |
420 | } | |
421 | ||
422 | if (bo->mem.mm_node) { | |
423 | spin_lock(&bo->lock); | |
d961db75 | 424 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
425 | bdev->man[bo->mem.mem_type].gpu_offset; |
426 | bo->cur_placement = bo->mem.placement; | |
427 | spin_unlock(&bo->lock); | |
354fb52c TH |
428 | } else |
429 | bo->offset = 0; | |
ba4e7d97 TH |
430 | |
431 | return 0; | |
432 | ||
433 | out_err: | |
434 | new_man = &bdev->man[bo->mem.mem_type]; | |
435 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
436 | ttm_tt_unbind(bo->ttm); | |
437 | ttm_tt_destroy(bo->ttm); | |
438 | bo->ttm = NULL; | |
439 | } | |
440 | ||
441 | return ret; | |
442 | } | |
443 | ||
1df6a2eb | 444 | /** |
40d857bb | 445 | * Call bo::reserved. |
1df6a2eb | 446 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
447 | * This is the place to put in driver specific hooks to release |
448 | * driver private resources. | |
449 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
450 | */ |
451 | ||
452 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
453 | { | |
1df6a2eb | 454 | if (bo->ttm) { |
1df6a2eb TH |
455 | ttm_tt_unbind(bo->ttm); |
456 | ttm_tt_destroy(bo->ttm); | |
457 | bo->ttm = NULL; | |
1df6a2eb TH |
458 | } |
459 | ||
40d857bb | 460 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
461 | |
462 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
463 | |
464 | /* | |
465 | * Make processes trying to reserve really pick it up. | |
466 | */ | |
467 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 468 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
469 | } |
470 | ||
e1efc9b6 | 471 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
472 | { |
473 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 474 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 475 | struct ttm_bo_driver *driver; |
aa123268 | 476 | void *sync_obj = NULL; |
e1efc9b6 TH |
477 | void *sync_obj_arg; |
478 | int put_count; | |
ba4e7d97 TH |
479 | int ret; |
480 | ||
481 | spin_lock(&bo->lock); | |
e1efc9b6 | 482 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 483 | if (!bo->sync_obj) { |
ba4e7d97 | 484 | |
a987fcaa | 485 | spin_lock(&glob->lru_lock); |
aaa20736 | 486 | |
1df6a2eb | 487 | /** |
e1efc9b6 TH |
488 | * Lock inversion between bo::reserve and bo::lock here, |
489 | * but that's OK, since we're only trylocking. | |
1df6a2eb TH |
490 | */ |
491 | ||
e1efc9b6 | 492 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 493 | |
e1efc9b6 TH |
494 | if (unlikely(ret == -EBUSY)) |
495 | goto queue; | |
1df6a2eb | 496 | |
e1efc9b6 | 497 | spin_unlock(&bo->lock); |
1df6a2eb | 498 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 499 | |
40d857bb | 500 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 501 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 502 | |
d6ea8886 | 503 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 504 | |
e1efc9b6 TH |
505 | return; |
506 | } else { | |
507 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 508 | } |
e1efc9b6 | 509 | queue: |
e1efc9b6 | 510 | driver = bdev->driver; |
aa123268 TH |
511 | if (bo->sync_obj) |
512 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
513 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
514 | |
515 | kref_get(&bo->list_kref); | |
516 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
517 | spin_unlock(&glob->lru_lock); | |
518 | spin_unlock(&bo->lock); | |
519 | ||
aa123268 | 520 | if (sync_obj) { |
e1efc9b6 | 521 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
522 | driver->sync_obj_unref(&sync_obj); |
523 | } | |
e1efc9b6 TH |
524 | schedule_delayed_work(&bdev->wq, |
525 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
526 | } | |
527 | ||
528 | /** | |
529 | * function ttm_bo_cleanup_refs | |
530 | * If bo idle, remove from delayed- and lru lists, and unref. | |
531 | * If not idle, do nothing. | |
532 | * | |
533 | * @interruptible Any sleeps should occur interruptibly. | |
534 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
535 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
536 | */ | |
537 | ||
538 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
539 | bool interruptible, | |
540 | bool no_wait_reserve, | |
541 | bool no_wait_gpu) | |
542 | { | |
543 | struct ttm_bo_global *glob = bo->glob; | |
544 | int put_count; | |
545 | int ret = 0; | |
546 | ||
547 | retry: | |
548 | spin_lock(&bo->lock); | |
549 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); | |
550 | spin_unlock(&bo->lock); | |
551 | ||
552 | if (unlikely(ret != 0)) | |
553 | return ret; | |
554 | ||
a987fcaa | 555 | spin_lock(&glob->lru_lock); |
e1efc9b6 TH |
556 | ret = ttm_bo_reserve_locked(bo, interruptible, |
557 | no_wait_reserve, false, 0); | |
ba4e7d97 | 558 | |
e1efc9b6 | 559 | if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) { |
a987fcaa | 560 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
561 | return ret; |
562 | } | |
ba4e7d97 | 563 | |
e1efc9b6 TH |
564 | /** |
565 | * We can re-check for sync object without taking | |
566 | * the bo::lock since setting the sync object requires | |
567 | * also bo::reserved. A busy object at this point may | |
568 | * be caused by another thread recently starting an accelerated | |
569 | * eviction. | |
570 | */ | |
ba4e7d97 | 571 | |
e1efc9b6 TH |
572 | if (unlikely(bo->sync_obj)) { |
573 | atomic_set(&bo->reserved, 0); | |
574 | wake_up_all(&bo->event_queue); | |
a987fcaa | 575 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 576 | goto retry; |
ba4e7d97 TH |
577 | } |
578 | ||
e1efc9b6 TH |
579 | put_count = ttm_bo_del_from_lru(bo); |
580 | list_del_init(&bo->ddestroy); | |
581 | ++put_count; | |
582 | ||
583 | spin_unlock(&glob->lru_lock); | |
584 | ttm_bo_cleanup_memtype_use(bo); | |
585 | ||
d6ea8886 | 586 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
587 | |
588 | return 0; | |
ba4e7d97 TH |
589 | } |
590 | ||
591 | /** | |
592 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
593 | * encountered buffers. | |
594 | */ | |
595 | ||
596 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
597 | { | |
a987fcaa | 598 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
599 | struct ttm_buffer_object *entry = NULL; |
600 | int ret = 0; | |
ba4e7d97 | 601 | |
a987fcaa | 602 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
603 | if (list_empty(&bdev->ddestroy)) |
604 | goto out_unlock; | |
605 | ||
606 | entry = list_first_entry(&bdev->ddestroy, | |
607 | struct ttm_buffer_object, ddestroy); | |
608 | kref_get(&entry->list_kref); | |
609 | ||
610 | for (;;) { | |
611 | struct ttm_buffer_object *nentry = NULL; | |
612 | ||
613 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
614 | nentry = list_first_entry(&entry->ddestroy, | |
615 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
616 | kref_get(&nentry->list_kref); |
617 | } | |
ba4e7d97 | 618 | |
a987fcaa | 619 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
620 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
621 | !remove_all); | |
ba4e7d97 | 622 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
623 | entry = nentry; |
624 | ||
625 | if (ret || !entry) | |
626 | goto out; | |
ba4e7d97 | 627 | |
a987fcaa | 628 | spin_lock(&glob->lru_lock); |
1a961ce0 | 629 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
630 | break; |
631 | } | |
ba4e7d97 | 632 | |
1a961ce0 LB |
633 | out_unlock: |
634 | spin_unlock(&glob->lru_lock); | |
635 | out: | |
636 | if (entry) | |
637 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
638 | return ret; |
639 | } | |
640 | ||
641 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
642 | { | |
643 | struct ttm_bo_device *bdev = | |
644 | container_of(work, struct ttm_bo_device, wq.work); | |
645 | ||
646 | if (ttm_bo_delayed_delete(bdev, false)) { | |
647 | schedule_delayed_work(&bdev->wq, | |
648 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
649 | } | |
650 | } | |
651 | ||
652 | static void ttm_bo_release(struct kref *kref) | |
653 | { | |
654 | struct ttm_buffer_object *bo = | |
655 | container_of(kref, struct ttm_buffer_object, kref); | |
656 | struct ttm_bo_device *bdev = bo->bdev; | |
657 | ||
658 | if (likely(bo->vm_node != NULL)) { | |
659 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
660 | drm_mm_put_block(bo->vm_node); | |
661 | bo->vm_node = NULL; | |
662 | } | |
663 | write_unlock(&bdev->vm_lock); | |
e1efc9b6 | 664 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
665 | kref_put(&bo->list_kref, ttm_bo_release_list); |
666 | write_lock(&bdev->vm_lock); | |
667 | } | |
668 | ||
669 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
670 | { | |
671 | struct ttm_buffer_object *bo = *p_bo; | |
672 | struct ttm_bo_device *bdev = bo->bdev; | |
673 | ||
674 | *p_bo = NULL; | |
675 | write_lock(&bdev->vm_lock); | |
676 | kref_put(&bo->kref, ttm_bo_release); | |
677 | write_unlock(&bdev->vm_lock); | |
678 | } | |
679 | EXPORT_SYMBOL(ttm_bo_unref); | |
680 | ||
7c5ee536 MG |
681 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
682 | { | |
683 | return cancel_delayed_work_sync(&bdev->wq); | |
684 | } | |
685 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
686 | ||
687 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
688 | { | |
689 | if (resched) | |
690 | schedule_delayed_work(&bdev->wq, | |
691 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
692 | } | |
693 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
694 | ||
ca262a99 | 695 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 696 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 697 | { |
ba4e7d97 TH |
698 | struct ttm_bo_device *bdev = bo->bdev; |
699 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
700 | struct ttm_placement placement; |
701 | int ret = 0; | |
ba4e7d97 TH |
702 | |
703 | spin_lock(&bo->lock); | |
9d87fa21 | 704 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 TH |
705 | spin_unlock(&bo->lock); |
706 | ||
78ecf091 | 707 | if (unlikely(ret != 0)) { |
98ffc415 | 708 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
709 | printk(KERN_ERR TTM_PFX |
710 | "Failed to expire sync object before " | |
711 | "buffer eviction.\n"); | |
712 | } | |
ba4e7d97 TH |
713 | goto out; |
714 | } | |
715 | ||
716 | BUG_ON(!atomic_read(&bo->reserved)); | |
717 | ||
718 | evict_mem = bo->mem; | |
719 | evict_mem.mm_node = NULL; | |
82c5da6b | 720 | evict_mem.bus.io_reserved = false; |
ba4e7d97 | 721 | |
7cb7d1d7 JG |
722 | placement.fpfn = 0; |
723 | placement.lpfn = 0; | |
724 | placement.num_placement = 0; | |
725 | placement.num_busy_placement = 0; | |
ca262a99 JG |
726 | bdev->driver->evict_flags(bo, &placement); |
727 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 728 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 729 | if (ret) { |
fb53f862 | 730 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
731 | printk(KERN_ERR TTM_PFX |
732 | "Failed to find memory space for " | |
733 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
734 | ttm_bo_mem_space_debug(bo, &placement); |
735 | } | |
ba4e7d97 TH |
736 | goto out; |
737 | } | |
738 | ||
739 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 740 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 741 | if (ret) { |
98ffc415 | 742 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 743 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 744 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
745 | goto out; |
746 | } | |
ca262a99 JG |
747 | bo->evicted = true; |
748 | out: | |
749 | return ret; | |
750 | } | |
751 | ||
752 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
753 | uint32_t mem_type, | |
9d87fa21 JG |
754 | bool interruptible, bool no_wait_reserve, |
755 | bool no_wait_gpu) | |
ca262a99 JG |
756 | { |
757 | struct ttm_bo_global *glob = bdev->glob; | |
758 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
759 | struct ttm_buffer_object *bo; | |
760 | int ret, put_count = 0; | |
ba4e7d97 | 761 | |
9c51ba1d | 762 | retry: |
a987fcaa | 763 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
764 | if (list_empty(&man->lru)) { |
765 | spin_unlock(&glob->lru_lock); | |
766 | return -EBUSY; | |
767 | } | |
768 | ||
ca262a99 JG |
769 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
770 | kref_get(&bo->list_kref); | |
9c51ba1d | 771 | |
e1efc9b6 TH |
772 | if (!list_empty(&bo->ddestroy)) { |
773 | spin_unlock(&glob->lru_lock); | |
774 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
775 | no_wait_reserve, no_wait_gpu); | |
776 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
777 | ||
778 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
779 | return ret; | |
780 | ||
781 | goto retry; | |
782 | } | |
783 | ||
9d87fa21 | 784 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
785 | |
786 | if (unlikely(ret == -EBUSY)) { | |
787 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 788 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
789 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
790 | ||
791 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
792 | ||
793 | /** | |
794 | * We *need* to retry after releasing the lru lock. | |
795 | */ | |
796 | ||
797 | if (unlikely(ret != 0)) | |
798 | return ret; | |
799 | goto retry; | |
800 | } | |
801 | ||
802 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 803 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
804 | |
805 | BUG_ON(ret != 0); | |
806 | ||
d6ea8886 | 807 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 808 | |
9d87fa21 | 809 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 810 | ttm_bo_unreserve(bo); |
9c51ba1d | 811 | |
ca262a99 | 812 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
813 | return ret; |
814 | } | |
815 | ||
42311ff9 BS |
816 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
817 | { | |
d961db75 | 818 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 819 | |
d961db75 BS |
820 | if (mem->mm_node) |
821 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
822 | } |
823 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
824 | ||
ba4e7d97 TH |
825 | /** |
826 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
827 | * space, or we've evicted everything and there isn't enough space. | |
828 | */ | |
ca262a99 JG |
829 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
830 | uint32_t mem_type, | |
831 | struct ttm_placement *placement, | |
832 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
833 | bool interruptible, |
834 | bool no_wait_reserve, | |
835 | bool no_wait_gpu) | |
ba4e7d97 | 836 | { |
ca262a99 | 837 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 838 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
839 | int ret; |
840 | ||
ba4e7d97 | 841 | do { |
d961db75 | 842 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
843 | if (unlikely(ret != 0)) |
844 | return ret; | |
d961db75 | 845 | if (mem->mm_node) |
ba4e7d97 | 846 | break; |
ca262a99 | 847 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 848 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
849 | if (unlikely(ret != 0)) |
850 | return ret; | |
ba4e7d97 | 851 | } while (1); |
d961db75 | 852 | if (mem->mm_node == NULL) |
ba4e7d97 | 853 | return -ENOMEM; |
ba4e7d97 TH |
854 | mem->mem_type = mem_type; |
855 | return 0; | |
856 | } | |
857 | ||
ae3e8122 TH |
858 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
859 | uint32_t cur_placement, | |
860 | uint32_t proposed_placement) | |
861 | { | |
862 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
863 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
864 | ||
865 | /** | |
866 | * Keep current caching if possible. | |
867 | */ | |
868 | ||
869 | if ((cur_placement & caching) != 0) | |
870 | result |= (cur_placement & caching); | |
871 | else if ((man->default_caching & caching) != 0) | |
872 | result |= man->default_caching; | |
873 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
874 | result |= TTM_PL_FLAG_CACHED; | |
875 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
876 | result |= TTM_PL_FLAG_WC; | |
877 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
878 | result |= TTM_PL_FLAG_UNCACHED; | |
879 | ||
880 | return result; | |
881 | } | |
882 | ||
ba4e7d97 TH |
883 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
884 | bool disallow_fixed, | |
885 | uint32_t mem_type, | |
ae3e8122 TH |
886 | uint32_t proposed_placement, |
887 | uint32_t *masked_placement) | |
ba4e7d97 TH |
888 | { |
889 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
890 | ||
891 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed) | |
892 | return false; | |
893 | ||
ae3e8122 | 894 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
895 | return false; |
896 | ||
ae3e8122 | 897 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 898 | return false; |
ba4e7d97 | 899 | |
ae3e8122 TH |
900 | cur_flags |= (proposed_placement & man->available_caching); |
901 | ||
902 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
903 | return true; |
904 | } | |
905 | ||
906 | /** | |
907 | * Creates space for memory region @mem according to its type. | |
908 | * | |
909 | * This function first searches for free space in compatible memory types in | |
910 | * the priority order defined by the driver. If free space isn't found, then | |
911 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
912 | * space. | |
913 | */ | |
914 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
915 | struct ttm_placement *placement, |
916 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
917 | bool interruptible, bool no_wait_reserve, |
918 | bool no_wait_gpu) | |
ba4e7d97 TH |
919 | { |
920 | struct ttm_bo_device *bdev = bo->bdev; | |
921 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
922 | uint32_t mem_type = TTM_PL_SYSTEM; |
923 | uint32_t cur_flags = 0; | |
924 | bool type_found = false; | |
925 | bool type_ok = false; | |
98ffc415 | 926 | bool has_erestartsys = false; |
ca262a99 | 927 | int i, ret; |
ba4e7d97 TH |
928 | |
929 | mem->mm_node = NULL; | |
b6637526 | 930 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
931 | ret = ttm_mem_type_from_flags(placement->placement[i], |
932 | &mem_type); | |
933 | if (ret) | |
934 | return ret; | |
ba4e7d97 TH |
935 | man = &bdev->man[mem_type]; |
936 | ||
937 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
938 | bo->type == ttm_bo_type_user, |
939 | mem_type, | |
940 | placement->placement[i], | |
941 | &cur_flags); | |
ba4e7d97 TH |
942 | |
943 | if (!type_ok) | |
944 | continue; | |
945 | ||
ae3e8122 TH |
946 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
947 | cur_flags); | |
ca262a99 JG |
948 | /* |
949 | * Use the access and other non-mapping-related flag bits from | |
950 | * the memory placement flags to the current flags | |
951 | */ | |
952 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
953 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 954 | |
ba4e7d97 TH |
955 | if (mem_type == TTM_PL_SYSTEM) |
956 | break; | |
957 | ||
958 | if (man->has_type && man->use_type) { | |
959 | type_found = true; | |
d961db75 | 960 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
961 | if (unlikely(ret)) |
962 | return ret; | |
ba4e7d97 | 963 | } |
d961db75 | 964 | if (mem->mm_node) |
ba4e7d97 TH |
965 | break; |
966 | } | |
967 | ||
d961db75 | 968 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
969 | mem->mem_type = mem_type; |
970 | mem->placement = cur_flags; | |
971 | return 0; | |
972 | } | |
973 | ||
974 | if (!type_found) | |
975 | return -EINVAL; | |
976 | ||
b6637526 DA |
977 | for (i = 0; i < placement->num_busy_placement; ++i) { |
978 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
979 | &mem_type); |
980 | if (ret) | |
981 | return ret; | |
ba4e7d97 | 982 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
983 | if (!man->has_type) |
984 | continue; | |
ba4e7d97 | 985 | if (!ttm_bo_mt_compatible(man, |
ca262a99 JG |
986 | bo->type == ttm_bo_type_user, |
987 | mem_type, | |
b6637526 | 988 | placement->busy_placement[i], |
ca262a99 | 989 | &cur_flags)) |
ba4e7d97 TH |
990 | continue; |
991 | ||
ae3e8122 TH |
992 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
993 | cur_flags); | |
ca262a99 JG |
994 | /* |
995 | * Use the access and other non-mapping-related flag bits from | |
996 | * the memory placement flags to the current flags | |
997 | */ | |
b6637526 | 998 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 999 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1000 | |
0eaddb28 TH |
1001 | |
1002 | if (mem_type == TTM_PL_SYSTEM) { | |
1003 | mem->mem_type = mem_type; | |
1004 | mem->placement = cur_flags; | |
1005 | mem->mm_node = NULL; | |
1006 | return 0; | |
1007 | } | |
1008 | ||
ca262a99 | 1009 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1010 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1011 | if (ret == 0 && mem->mm_node) { |
1012 | mem->placement = cur_flags; | |
1013 | return 0; | |
1014 | } | |
98ffc415 TH |
1015 | if (ret == -ERESTARTSYS) |
1016 | has_erestartsys = true; | |
ba4e7d97 | 1017 | } |
98ffc415 | 1018 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1019 | return ret; |
1020 | } | |
1021 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1022 | ||
1023 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1024 | { | |
ba4e7d97 TH |
1025 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1026 | return -EBUSY; | |
1027 | ||
98ffc415 TH |
1028 | return wait_event_interruptible(bo->event_queue, |
1029 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1030 | } |
d1ede145 | 1031 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1032 | |
1033 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1034 | struct ttm_placement *placement, |
9d87fa21 JG |
1035 | bool interruptible, bool no_wait_reserve, |
1036 | bool no_wait_gpu) | |
ba4e7d97 | 1037 | { |
ba4e7d97 TH |
1038 | int ret = 0; |
1039 | struct ttm_mem_reg mem; | |
1040 | ||
1041 | BUG_ON(!atomic_read(&bo->reserved)); | |
1042 | ||
1043 | /* | |
1044 | * FIXME: It's possible to pipeline buffer moves. | |
1045 | * Have the driver move function wait for idle when necessary, | |
1046 | * instead of doing it here. | |
1047 | */ | |
ba4e7d97 | 1048 | spin_lock(&bo->lock); |
9d87fa21 | 1049 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
ba4e7d97 | 1050 | spin_unlock(&bo->lock); |
ba4e7d97 TH |
1051 | if (ret) |
1052 | return ret; | |
ba4e7d97 TH |
1053 | mem.num_pages = bo->num_pages; |
1054 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1055 | mem.page_alignment = bo->mem.page_alignment; | |
82c5da6b | 1056 | mem.bus.io_reserved = false; |
ba4e7d97 TH |
1057 | /* |
1058 | * Determine where to move the buffer. | |
1059 | */ | |
9d87fa21 | 1060 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1061 | if (ret) |
1062 | goto out_unlock; | |
9d87fa21 | 1063 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1064 | out_unlock: |
d961db75 BS |
1065 | if (ret && mem.mm_node) |
1066 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1067 | return ret; |
1068 | } | |
1069 | ||
ca262a99 | 1070 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1071 | struct ttm_mem_reg *mem) |
1072 | { | |
ca262a99 | 1073 | int i; |
e22238ea | 1074 | |
d961db75 BS |
1075 | if (mem->mm_node && placement->lpfn != 0 && |
1076 | (mem->start < placement->fpfn || | |
1077 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1078 | return -1; |
ca262a99 JG |
1079 | |
1080 | for (i = 0; i < placement->num_placement; i++) { | |
1081 | if ((placement->placement[i] & mem->placement & | |
1082 | TTM_PL_MASK_CACHING) && | |
1083 | (placement->placement[i] & mem->placement & | |
1084 | TTM_PL_MASK_MEM)) | |
1085 | return i; | |
1086 | } | |
1087 | return -1; | |
ba4e7d97 TH |
1088 | } |
1089 | ||
09855acb JG |
1090 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1091 | struct ttm_placement *placement, | |
9d87fa21 JG |
1092 | bool interruptible, bool no_wait_reserve, |
1093 | bool no_wait_gpu) | |
ba4e7d97 TH |
1094 | { |
1095 | int ret; | |
1096 | ||
1097 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1098 | /* Check that range is valid */ |
1099 | if (placement->lpfn || placement->fpfn) | |
1100 | if (placement->fpfn > placement->lpfn || | |
1101 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1102 | return -EINVAL; | |
ba4e7d97 TH |
1103 | /* |
1104 | * Check whether we need to move buffer. | |
1105 | */ | |
ca262a99 JG |
1106 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1107 | if (ret < 0) { | |
9d87fa21 | 1108 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1109 | if (ret) |
ba4e7d97 | 1110 | return ret; |
ca262a99 JG |
1111 | } else { |
1112 | /* | |
1113 | * Use the access and other non-mapping-related flag bits from | |
1114 | * the compatible memory placement flags to the active flags | |
1115 | */ | |
1116 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1117 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1118 | } |
ba4e7d97 TH |
1119 | /* |
1120 | * We might need to add a TTM. | |
1121 | */ | |
ba4e7d97 TH |
1122 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1123 | ret = ttm_bo_add_ttm(bo, true); | |
1124 | if (ret) | |
1125 | return ret; | |
1126 | } | |
ba4e7d97 TH |
1127 | return 0; |
1128 | } | |
09855acb | 1129 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1130 | |
09855acb JG |
1131 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1132 | struct ttm_placement *placement) | |
ba4e7d97 | 1133 | { |
29e190e0 TH |
1134 | BUG_ON((placement->fpfn || placement->lpfn) && |
1135 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1136 | |
ba4e7d97 TH |
1137 | return 0; |
1138 | } | |
1139 | ||
09855acb JG |
1140 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1141 | struct ttm_buffer_object *bo, | |
1142 | unsigned long size, | |
1143 | enum ttm_bo_type type, | |
1144 | struct ttm_placement *placement, | |
1145 | uint32_t page_alignment, | |
1146 | unsigned long buffer_start, | |
1147 | bool interruptible, | |
1148 | struct file *persistant_swap_storage, | |
1149 | size_t acc_size, | |
1150 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1151 | { |
09855acb | 1152 | int ret = 0; |
ba4e7d97 TH |
1153 | unsigned long num_pages; |
1154 | ||
1155 | size += buffer_start & ~PAGE_MASK; | |
1156 | num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1157 | if (num_pages == 0) { | |
1158 | printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n"); | |
7dfbbdcf TH |
1159 | if (destroy) |
1160 | (*destroy)(bo); | |
1161 | else | |
1162 | kfree(bo); | |
ba4e7d97 TH |
1163 | return -EINVAL; |
1164 | } | |
1165 | bo->destroy = destroy; | |
1166 | ||
1167 | spin_lock_init(&bo->lock); | |
1168 | kref_init(&bo->kref); | |
1169 | kref_init(&bo->list_kref); | |
1170 | atomic_set(&bo->cpu_writers, 0); | |
1171 | atomic_set(&bo->reserved, 1); | |
1172 | init_waitqueue_head(&bo->event_queue); | |
1173 | INIT_LIST_HEAD(&bo->lru); | |
1174 | INIT_LIST_HEAD(&bo->ddestroy); | |
1175 | INIT_LIST_HEAD(&bo->swap); | |
1176 | bo->bdev = bdev; | |
a987fcaa | 1177 | bo->glob = bdev->glob; |
ba4e7d97 TH |
1178 | bo->type = type; |
1179 | bo->num_pages = num_pages; | |
eb6d2c39 | 1180 | bo->mem.size = num_pages << PAGE_SHIFT; |
ba4e7d97 TH |
1181 | bo->mem.mem_type = TTM_PL_SYSTEM; |
1182 | bo->mem.num_pages = bo->num_pages; | |
1183 | bo->mem.mm_node = NULL; | |
1184 | bo->mem.page_alignment = page_alignment; | |
82c5da6b | 1185 | bo->mem.bus.io_reserved = false; |
ba4e7d97 TH |
1186 | bo->buffer_start = buffer_start & PAGE_MASK; |
1187 | bo->priv_flags = 0; | |
1188 | bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); | |
1189 | bo->seq_valid = false; | |
1190 | bo->persistant_swap_storage = persistant_swap_storage; | |
1191 | bo->acc_size = acc_size; | |
a987fcaa | 1192 | atomic_inc(&bo->glob->bo_count); |
ba4e7d97 | 1193 | |
09855acb | 1194 | ret = ttm_bo_check_placement(bo, placement); |
ba4e7d97 TH |
1195 | if (unlikely(ret != 0)) |
1196 | goto out_err; | |
1197 | ||
ba4e7d97 TH |
1198 | /* |
1199 | * For ttm_bo_type_device buffers, allocate | |
1200 | * address space from the device. | |
1201 | */ | |
ba4e7d97 TH |
1202 | if (bo->type == ttm_bo_type_device) { |
1203 | ret = ttm_bo_setup_vm(bo); | |
1204 | if (ret) | |
1205 | goto out_err; | |
1206 | } | |
1207 | ||
9d87fa21 | 1208 | ret = ttm_bo_validate(bo, placement, interruptible, false, false); |
ba4e7d97 TH |
1209 | if (ret) |
1210 | goto out_err; | |
1211 | ||
1212 | ttm_bo_unreserve(bo); | |
1213 | return 0; | |
1214 | ||
1215 | out_err: | |
1216 | ttm_bo_unreserve(bo); | |
1217 | ttm_bo_unref(&bo); | |
1218 | ||
1219 | return ret; | |
1220 | } | |
09855acb | 1221 | EXPORT_SYMBOL(ttm_bo_init); |
ba4e7d97 | 1222 | |
a987fcaa | 1223 | static inline size_t ttm_bo_size(struct ttm_bo_global *glob, |
ba4e7d97 TH |
1224 | unsigned long num_pages) |
1225 | { | |
1226 | size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) & | |
1227 | PAGE_MASK; | |
1228 | ||
a987fcaa | 1229 | return glob->ttm_bo_size + 2 * page_array_size; |
ba4e7d97 TH |
1230 | } |
1231 | ||
09855acb JG |
1232 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1233 | unsigned long size, | |
1234 | enum ttm_bo_type type, | |
1235 | struct ttm_placement *placement, | |
1236 | uint32_t page_alignment, | |
1237 | unsigned long buffer_start, | |
1238 | bool interruptible, | |
1239 | struct file *persistant_swap_storage, | |
1240 | struct ttm_buffer_object **p_bo) | |
ba4e7d97 TH |
1241 | { |
1242 | struct ttm_buffer_object *bo; | |
a987fcaa | 1243 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
ca262a99 | 1244 | int ret; |
ba4e7d97 TH |
1245 | |
1246 | size_t acc_size = | |
a987fcaa | 1247 | ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT); |
5fd9cbad | 1248 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1249 | if (unlikely(ret != 0)) |
1250 | return ret; | |
1251 | ||
1252 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1253 | ||
1254 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1255 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1256 | return -ENOMEM; |
1257 | } | |
1258 | ||
09855acb JG |
1259 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1260 | buffer_start, interruptible, | |
1261 | persistant_swap_storage, acc_size, NULL); | |
ba4e7d97 TH |
1262 | if (likely(ret == 0)) |
1263 | *p_bo = bo; | |
1264 | ||
1265 | return ret; | |
1266 | } | |
1267 | ||
ba4e7d97 | 1268 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1269 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1270 | { |
ca262a99 | 1271 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1272 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1273 | int ret; |
ba4e7d97 TH |
1274 | |
1275 | /* | |
1276 | * Can't use standard list traversal since we're unlocking. | |
1277 | */ | |
1278 | ||
a987fcaa | 1279 | spin_lock(&glob->lru_lock); |
ca262a99 | 1280 | while (!list_empty(&man->lru)) { |
a987fcaa | 1281 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1282 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1283 | if (ret) { |
1284 | if (allow_errors) { | |
1285 | return ret; | |
1286 | } else { | |
1287 | printk(KERN_ERR TTM_PFX | |
1288 | "Cleanup eviction failed\n"); | |
1289 | } | |
1290 | } | |
a987fcaa | 1291 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1292 | } |
a987fcaa | 1293 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1294 | return 0; |
1295 | } | |
1296 | ||
1297 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1298 | { | |
c96e7c7a | 1299 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1300 | int ret = -EINVAL; |
1301 | ||
1302 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1303 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1304 | return ret; | |
1305 | } | |
c96e7c7a | 1306 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1307 | |
1308 | if (!man->has_type) { | |
1309 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1310 | "memory manager type %u\n", mem_type); | |
1311 | return ret; | |
1312 | } | |
1313 | ||
1314 | man->use_type = false; | |
1315 | man->has_type = false; | |
1316 | ||
1317 | ret = 0; | |
1318 | if (mem_type > 0) { | |
ca262a99 | 1319 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1320 | |
d961db75 | 1321 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1322 | } |
1323 | ||
1324 | return ret; | |
1325 | } | |
1326 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1327 | ||
1328 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1329 | { | |
1330 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1331 | ||
1332 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1333 | printk(KERN_ERR TTM_PFX | |
1334 | "Illegal memory manager memory type %u.\n", | |
1335 | mem_type); | |
1336 | return -EINVAL; | |
1337 | } | |
1338 | ||
1339 | if (!man->has_type) { | |
1340 | printk(KERN_ERR TTM_PFX | |
1341 | "Memory type %u has not been initialized.\n", | |
1342 | mem_type); | |
1343 | return 0; | |
1344 | } | |
1345 | ||
ca262a99 | 1346 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1347 | } |
1348 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1349 | ||
1350 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1351 | unsigned long p_size) |
ba4e7d97 TH |
1352 | { |
1353 | int ret = -EINVAL; | |
1354 | struct ttm_mem_type_manager *man; | |
1355 | ||
dbc4a5b8 | 1356 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1357 | man = &bdev->man[type]; |
dbc4a5b8 | 1358 | BUG_ON(man->has_type); |
ba4e7d97 TH |
1359 | |
1360 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1361 | if (ret) | |
1362 | return ret; | |
d961db75 | 1363 | man->bdev = bdev; |
ba4e7d97 TH |
1364 | |
1365 | ret = 0; | |
1366 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1367 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1368 | if (ret) |
1369 | return ret; | |
1370 | } | |
1371 | man->has_type = true; | |
1372 | man->use_type = true; | |
1373 | man->size = p_size; | |
1374 | ||
1375 | INIT_LIST_HEAD(&man->lru); | |
1376 | ||
1377 | return 0; | |
1378 | } | |
1379 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1380 | ||
a987fcaa TH |
1381 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1382 | { | |
1383 | struct ttm_bo_global *glob = | |
1384 | container_of(kobj, struct ttm_bo_global, kobj); | |
1385 | ||
a987fcaa TH |
1386 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1387 | __free_page(glob->dummy_read_page); | |
1388 | kfree(glob); | |
1389 | } | |
1390 | ||
ba4420c2 | 1391 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1392 | { |
1393 | struct ttm_bo_global *glob = ref->object; | |
1394 | ||
1395 | kobject_del(&glob->kobj); | |
1396 | kobject_put(&glob->kobj); | |
1397 | } | |
1398 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1399 | ||
ba4420c2 | 1400 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1401 | { |
1402 | struct ttm_bo_global_ref *bo_ref = | |
1403 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1404 | struct ttm_bo_global *glob = ref->object; | |
1405 | int ret; | |
1406 | ||
1407 | mutex_init(&glob->device_list_mutex); | |
1408 | spin_lock_init(&glob->lru_lock); | |
1409 | glob->mem_glob = bo_ref->mem_glob; | |
1410 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1411 | ||
1412 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1413 | ret = -ENOMEM; | |
1414 | goto out_no_drp; | |
1415 | } | |
1416 | ||
1417 | INIT_LIST_HEAD(&glob->swap_lru); | |
1418 | INIT_LIST_HEAD(&glob->device_list); | |
1419 | ||
1420 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1421 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1422 | if (unlikely(ret != 0)) { | |
1423 | printk(KERN_ERR TTM_PFX | |
1424 | "Could not register buffer object swapout.\n"); | |
1425 | goto out_no_shrink; | |
1426 | } | |
1427 | ||
1428 | glob->ttm_bo_extra_size = | |
1429 | ttm_round_pot(sizeof(struct ttm_tt)) + | |
1430 | ttm_round_pot(sizeof(struct ttm_backend)); | |
1431 | ||
1432 | glob->ttm_bo_size = glob->ttm_bo_extra_size + | |
1433 | ttm_round_pot(sizeof(struct ttm_buffer_object)); | |
1434 | ||
1435 | atomic_set(&glob->bo_count, 0); | |
1436 | ||
b642ed06 RD |
1437 | ret = kobject_init_and_add( |
1438 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1439 | if (unlikely(ret != 0)) |
1440 | kobject_put(&glob->kobj); | |
1441 | return ret; | |
1442 | out_no_shrink: | |
1443 | __free_page(glob->dummy_read_page); | |
1444 | out_no_drp: | |
1445 | kfree(glob); | |
1446 | return ret; | |
1447 | } | |
1448 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1449 | ||
1450 | ||
ba4e7d97 TH |
1451 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1452 | { | |
1453 | int ret = 0; | |
1454 | unsigned i = TTM_NUM_MEM_TYPES; | |
1455 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1456 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1457 | |
1458 | while (i--) { | |
1459 | man = &bdev->man[i]; | |
1460 | if (man->has_type) { | |
1461 | man->use_type = false; | |
1462 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1463 | ret = -EBUSY; | |
1464 | printk(KERN_ERR TTM_PFX | |
1465 | "DRM memory manager type %d " | |
1466 | "is not clean.\n", i); | |
1467 | } | |
1468 | man->has_type = false; | |
1469 | } | |
1470 | } | |
1471 | ||
a987fcaa TH |
1472 | mutex_lock(&glob->device_list_mutex); |
1473 | list_del(&bdev->device_list); | |
1474 | mutex_unlock(&glob->device_list_mutex); | |
1475 | ||
ba4e7d97 TH |
1476 | if (!cancel_delayed_work(&bdev->wq)) |
1477 | flush_scheduled_work(); | |
1478 | ||
1479 | while (ttm_bo_delayed_delete(bdev, true)) | |
1480 | ; | |
1481 | ||
a987fcaa | 1482 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1483 | if (list_empty(&bdev->ddestroy)) |
1484 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1485 | ||
1486 | if (list_empty(&bdev->man[0].lru)) | |
1487 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1488 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1489 | |
ba4e7d97 TH |
1490 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1491 | write_lock(&bdev->vm_lock); | |
1492 | drm_mm_takedown(&bdev->addr_space_mm); | |
1493 | write_unlock(&bdev->vm_lock); | |
1494 | ||
ba4e7d97 TH |
1495 | return ret; |
1496 | } | |
1497 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1498 | ||
ba4e7d97 | 1499 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1500 | struct ttm_bo_global *glob, |
1501 | struct ttm_bo_driver *driver, | |
51c8b407 | 1502 | uint64_t file_page_offset, |
ad49f501 | 1503 | bool need_dma32) |
ba4e7d97 TH |
1504 | { |
1505 | int ret = -EINVAL; | |
1506 | ||
ba4e7d97 | 1507 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1508 | bdev->driver = driver; |
ba4e7d97 TH |
1509 | |
1510 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1511 | ||
ba4e7d97 TH |
1512 | /* |
1513 | * Initialize the system memory buffer type. | |
1514 | * Other types need to be driver / IOCTL initialized. | |
1515 | */ | |
ca262a99 | 1516 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1517 | if (unlikely(ret != 0)) |
a987fcaa | 1518 | goto out_no_sys; |
ba4e7d97 TH |
1519 | |
1520 | bdev->addr_space_rb = RB_ROOT; | |
1521 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1522 | if (unlikely(ret != 0)) | |
a987fcaa | 1523 | goto out_no_addr_mm; |
ba4e7d97 TH |
1524 | |
1525 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1526 | bdev->nice_mode = true; | |
1527 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1528 | bdev->dev_mapping = NULL; |
a987fcaa | 1529 | bdev->glob = glob; |
ad49f501 | 1530 | bdev->need_dma32 = need_dma32; |
ba4e7d97 | 1531 | |
a987fcaa TH |
1532 | mutex_lock(&glob->device_list_mutex); |
1533 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1534 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1535 | |
1536 | return 0; | |
a987fcaa | 1537 | out_no_addr_mm: |
ba4e7d97 | 1538 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1539 | out_no_sys: |
ba4e7d97 TH |
1540 | return ret; |
1541 | } | |
1542 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1543 | ||
1544 | /* | |
1545 | * buffer object vm functions. | |
1546 | */ | |
1547 | ||
1548 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1549 | { | |
1550 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1551 | ||
1552 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1553 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1554 | return false; | |
1555 | ||
1556 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1557 | return false; | |
1558 | ||
1559 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1560 | return false; | |
1561 | } | |
1562 | return true; | |
1563 | } | |
1564 | ||
ba4e7d97 TH |
1565 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) |
1566 | { | |
1567 | struct ttm_bo_device *bdev = bo->bdev; | |
1568 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1569 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1570 | ||
1571 | if (!bdev->dev_mapping) | |
1572 | return; | |
ba4e7d97 | 1573 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
82c5da6b | 1574 | ttm_mem_io_free(bdev, &bo->mem); |
ba4e7d97 | 1575 | } |
e024e110 | 1576 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1577 | |
1578 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1579 | { | |
1580 | struct ttm_bo_device *bdev = bo->bdev; | |
1581 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1582 | struct rb_node *parent = NULL; | |
1583 | struct ttm_buffer_object *cur_bo; | |
1584 | unsigned long offset = bo->vm_node->start; | |
1585 | unsigned long cur_offset; | |
1586 | ||
1587 | while (*cur) { | |
1588 | parent = *cur; | |
1589 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1590 | cur_offset = cur_bo->vm_node->start; | |
1591 | if (offset < cur_offset) | |
1592 | cur = &parent->rb_left; | |
1593 | else if (offset > cur_offset) | |
1594 | cur = &parent->rb_right; | |
1595 | else | |
1596 | BUG(); | |
1597 | } | |
1598 | ||
1599 | rb_link_node(&bo->vm_rb, parent, cur); | |
1600 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1601 | } | |
1602 | ||
1603 | /** | |
1604 | * ttm_bo_setup_vm: | |
1605 | * | |
1606 | * @bo: the buffer to allocate address space for | |
1607 | * | |
1608 | * Allocate address space in the drm device so that applications | |
1609 | * can mmap the buffer and access the contents. This only | |
1610 | * applies to ttm_bo_type_device objects as others are not | |
1611 | * placed in the drm device address space. | |
1612 | */ | |
1613 | ||
1614 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1615 | { | |
1616 | struct ttm_bo_device *bdev = bo->bdev; | |
1617 | int ret; | |
1618 | ||
1619 | retry_pre_get: | |
1620 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1621 | if (unlikely(ret != 0)) | |
1622 | return ret; | |
1623 | ||
1624 | write_lock(&bdev->vm_lock); | |
1625 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1626 | bo->mem.num_pages, 0, 0); | |
1627 | ||
1628 | if (unlikely(bo->vm_node == NULL)) { | |
1629 | ret = -ENOMEM; | |
1630 | goto out_unlock; | |
1631 | } | |
1632 | ||
1633 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1634 | bo->mem.num_pages, 0); | |
1635 | ||
1636 | if (unlikely(bo->vm_node == NULL)) { | |
1637 | write_unlock(&bdev->vm_lock); | |
1638 | goto retry_pre_get; | |
1639 | } | |
1640 | ||
1641 | ttm_bo_vm_insert_rb(bo); | |
1642 | write_unlock(&bdev->vm_lock); | |
1643 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1644 | ||
1645 | return 0; | |
1646 | out_unlock: | |
1647 | write_unlock(&bdev->vm_lock); | |
1648 | return ret; | |
1649 | } | |
1650 | ||
1651 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1652 | bool lazy, bool interruptible, bool no_wait) | |
1653 | { | |
1654 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
1655 | void *sync_obj; | |
1656 | void *sync_obj_arg; | |
1657 | int ret = 0; | |
1658 | ||
1659 | if (likely(bo->sync_obj == NULL)) | |
1660 | return 0; | |
1661 | ||
1662 | while (bo->sync_obj) { | |
1663 | ||
1664 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { | |
1665 | void *tmp_obj = bo->sync_obj; | |
1666 | bo->sync_obj = NULL; | |
1667 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1668 | spin_unlock(&bo->lock); | |
1669 | driver->sync_obj_unref(&tmp_obj); | |
1670 | spin_lock(&bo->lock); | |
1671 | continue; | |
1672 | } | |
1673 | ||
1674 | if (no_wait) | |
1675 | return -EBUSY; | |
1676 | ||
1677 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
1678 | sync_obj_arg = bo->sync_obj_arg; | |
1679 | spin_unlock(&bo->lock); | |
1680 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, | |
1681 | lazy, interruptible); | |
1682 | if (unlikely(ret != 0)) { | |
1683 | driver->sync_obj_unref(&sync_obj); | |
1684 | spin_lock(&bo->lock); | |
1685 | return ret; | |
1686 | } | |
1687 | spin_lock(&bo->lock); | |
1688 | if (likely(bo->sync_obj == sync_obj && | |
1689 | bo->sync_obj_arg == sync_obj_arg)) { | |
1690 | void *tmp_obj = bo->sync_obj; | |
1691 | bo->sync_obj = NULL; | |
1692 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1693 | &bo->priv_flags); | |
1694 | spin_unlock(&bo->lock); | |
1695 | driver->sync_obj_unref(&sync_obj); | |
1696 | driver->sync_obj_unref(&tmp_obj); | |
1697 | spin_lock(&bo->lock); | |
fee280d3 TH |
1698 | } else { |
1699 | spin_unlock(&bo->lock); | |
1700 | driver->sync_obj_unref(&sync_obj); | |
1701 | spin_lock(&bo->lock); | |
ba4e7d97 TH |
1702 | } |
1703 | } | |
1704 | return 0; | |
1705 | } | |
1706 | EXPORT_SYMBOL(ttm_bo_wait); | |
1707 | ||
ba4e7d97 TH |
1708 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1709 | { | |
1710 | int ret = 0; | |
1711 | ||
1712 | /* | |
8cfe92d6 | 1713 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1714 | */ |
1715 | ||
1716 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1717 | if (unlikely(ret != 0)) | |
1718 | return ret; | |
1719 | spin_lock(&bo->lock); | |
1720 | ret = ttm_bo_wait(bo, false, true, no_wait); | |
1721 | spin_unlock(&bo->lock); | |
1722 | if (likely(ret == 0)) | |
1723 | atomic_inc(&bo->cpu_writers); | |
1724 | ttm_bo_unreserve(bo); | |
1725 | return ret; | |
1726 | } | |
d1ede145 | 1727 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1728 | |
1729 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1730 | { | |
1731 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1732 | wake_up_all(&bo->event_queue); | |
1733 | } | |
d1ede145 | 1734 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1735 | |
1736 | /** | |
1737 | * A buffer object shrink method that tries to swap out the first | |
1738 | * buffer object on the bo_global::swap_lru list. | |
1739 | */ | |
1740 | ||
1741 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1742 | { | |
a987fcaa TH |
1743 | struct ttm_bo_global *glob = |
1744 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1745 | struct ttm_buffer_object *bo; |
1746 | int ret = -EBUSY; | |
1747 | int put_count; | |
1748 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1749 | ||
a987fcaa | 1750 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1751 | while (ret == -EBUSY) { |
a987fcaa TH |
1752 | if (unlikely(list_empty(&glob->swap_lru))) { |
1753 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1754 | return -EBUSY; |
1755 | } | |
1756 | ||
a987fcaa | 1757 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1758 | struct ttm_buffer_object, swap); |
1759 | kref_get(&bo->list_kref); | |
1760 | ||
e1efc9b6 TH |
1761 | if (!list_empty(&bo->ddestroy)) { |
1762 | spin_unlock(&glob->lru_lock); | |
1763 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1764 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1765 | continue; | |
1766 | } | |
1767 | ||
ba4e7d97 TH |
1768 | /** |
1769 | * Reserve buffer. Since we unlock while sleeping, we need | |
1770 | * to re-check that nobody removed us from the swap-list while | |
1771 | * we slept. | |
1772 | */ | |
1773 | ||
1774 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1775 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1776 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1777 | ttm_bo_wait_unreserved(bo, false); |
1778 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1779 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1780 | } |
1781 | } | |
1782 | ||
1783 | BUG_ON(ret != 0); | |
1784 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1785 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1786 | |
d6ea8886 | 1787 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
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); |