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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; | |
57de4ba9 | 140 | size_t acc_size = bo->acc_size; |
ba4e7d97 TH |
141 | |
142 | BUG_ON(atomic_read(&bo->list_kref.refcount)); | |
143 | BUG_ON(atomic_read(&bo->kref.refcount)); | |
144 | BUG_ON(atomic_read(&bo->cpu_writers)); | |
145 | BUG_ON(bo->sync_obj != NULL); | |
146 | BUG_ON(bo->mem.mm_node != NULL); | |
147 | BUG_ON(!list_empty(&bo->lru)); | |
148 | BUG_ON(!list_empty(&bo->ddestroy)); | |
149 | ||
150 | if (bo->ttm) | |
151 | ttm_tt_destroy(bo->ttm); | |
a987fcaa | 152 | atomic_dec(&bo->glob->bo_count); |
ba4e7d97 TH |
153 | if (bo->destroy) |
154 | bo->destroy(bo); | |
155 | else { | |
ba4e7d97 TH |
156 | kfree(bo); |
157 | } | |
57de4ba9 | 158 | ttm_mem_global_free(bdev->glob->mem_glob, acc_size); |
ba4e7d97 TH |
159 | } |
160 | ||
161 | int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible) | |
162 | { | |
ba4e7d97 | 163 | if (interruptible) { |
965d3807 | 164 | return wait_event_interruptible(bo->event_queue, |
ba4e7d97 | 165 | atomic_read(&bo->reserved) == 0); |
ba4e7d97 TH |
166 | } else { |
167 | wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0); | |
965d3807 | 168 | return 0; |
ba4e7d97 | 169 | } |
ba4e7d97 | 170 | } |
d1ede145 | 171 | EXPORT_SYMBOL(ttm_bo_wait_unreserved); |
ba4e7d97 | 172 | |
d6ea8886 | 173 | void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
174 | { |
175 | struct ttm_bo_device *bdev = bo->bdev; | |
176 | struct ttm_mem_type_manager *man; | |
177 | ||
178 | BUG_ON(!atomic_read(&bo->reserved)); | |
179 | ||
180 | if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { | |
181 | ||
182 | BUG_ON(!list_empty(&bo->lru)); | |
183 | ||
184 | man = &bdev->man[bo->mem.mem_type]; | |
185 | list_add_tail(&bo->lru, &man->lru); | |
186 | kref_get(&bo->list_kref); | |
187 | ||
188 | if (bo->ttm != NULL) { | |
a987fcaa | 189 | list_add_tail(&bo->swap, &bo->glob->swap_lru); |
ba4e7d97 TH |
190 | kref_get(&bo->list_kref); |
191 | } | |
192 | } | |
193 | } | |
194 | ||
d6ea8886 | 195 | int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
196 | { |
197 | int put_count = 0; | |
198 | ||
199 | if (!list_empty(&bo->swap)) { | |
200 | list_del_init(&bo->swap); | |
201 | ++put_count; | |
202 | } | |
203 | if (!list_empty(&bo->lru)) { | |
204 | list_del_init(&bo->lru); | |
205 | ++put_count; | |
206 | } | |
207 | ||
208 | /* | |
209 | * TODO: Add a driver hook to delete from | |
210 | * driver-specific LRU's here. | |
211 | */ | |
212 | ||
213 | return put_count; | |
214 | } | |
215 | ||
216 | int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, | |
217 | bool interruptible, | |
218 | bool no_wait, bool use_sequence, uint32_t sequence) | |
219 | { | |
a987fcaa | 220 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
221 | int ret; |
222 | ||
223 | while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) { | |
95ccb0f3 TH |
224 | /** |
225 | * Deadlock avoidance for multi-bo reserving. | |
226 | */ | |
96726fe5 TH |
227 | if (use_sequence && bo->seq_valid) { |
228 | /** | |
229 | * We've already reserved this one. | |
230 | */ | |
231 | if (unlikely(sequence == bo->val_seq)) | |
232 | return -EDEADLK; | |
233 | /** | |
234 | * Already reserved by a thread that will not back | |
235 | * off for us. We need to back off. | |
236 | */ | |
237 | if (unlikely(sequence - bo->val_seq < (1 << 31))) | |
238 | return -EAGAIN; | |
ba4e7d97 TH |
239 | } |
240 | ||
241 | if (no_wait) | |
242 | return -EBUSY; | |
243 | ||
a987fcaa | 244 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 245 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
a987fcaa | 246 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
247 | |
248 | if (unlikely(ret)) | |
249 | return ret; | |
250 | } | |
251 | ||
252 | if (use_sequence) { | |
95ccb0f3 TH |
253 | /** |
254 | * Wake up waiters that may need to recheck for deadlock, | |
255 | * if we decreased the sequence number. | |
256 | */ | |
257 | if (unlikely((bo->val_seq - sequence < (1 << 31)) | |
258 | || !bo->seq_valid)) | |
259 | wake_up_all(&bo->event_queue); | |
260 | ||
ba4e7d97 TH |
261 | bo->val_seq = sequence; |
262 | bo->seq_valid = true; | |
263 | } else { | |
264 | bo->seq_valid = false; | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | EXPORT_SYMBOL(ttm_bo_reserve); | |
270 | ||
271 | static void ttm_bo_ref_bug(struct kref *list_kref) | |
272 | { | |
273 | BUG(); | |
274 | } | |
275 | ||
d6ea8886 DA |
276 | void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
277 | bool never_free) | |
278 | { | |
2357cbe5 TH |
279 | kref_sub(&bo->list_kref, count, |
280 | (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list); | |
d6ea8886 DA |
281 | } |
282 | ||
ba4e7d97 TH |
283 | int ttm_bo_reserve(struct ttm_buffer_object *bo, |
284 | bool interruptible, | |
285 | bool no_wait, bool use_sequence, uint32_t sequence) | |
286 | { | |
a987fcaa | 287 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
288 | int put_count = 0; |
289 | int ret; | |
290 | ||
a987fcaa | 291 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
292 | ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence, |
293 | sequence); | |
294 | if (likely(ret == 0)) | |
295 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 296 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 297 | |
d6ea8886 | 298 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
299 | |
300 | return ret; | |
301 | } | |
302 | ||
95762c2b TH |
303 | void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo) |
304 | { | |
305 | ttm_bo_add_to_lru(bo); | |
306 | atomic_set(&bo->reserved, 0); | |
307 | wake_up_all(&bo->event_queue); | |
308 | } | |
309 | ||
ba4e7d97 TH |
310 | void ttm_bo_unreserve(struct ttm_buffer_object *bo) |
311 | { | |
a987fcaa | 312 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 | 313 | |
a987fcaa | 314 | spin_lock(&glob->lru_lock); |
95762c2b | 315 | ttm_bo_unreserve_locked(bo); |
a987fcaa | 316 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
317 | } |
318 | EXPORT_SYMBOL(ttm_bo_unreserve); | |
319 | ||
320 | /* | |
321 | * Call bo->mutex locked. | |
322 | */ | |
ba4e7d97 TH |
323 | static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) |
324 | { | |
325 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 326 | struct ttm_bo_global *glob = bo->glob; |
ba4e7d97 TH |
327 | int ret = 0; |
328 | uint32_t page_flags = 0; | |
329 | ||
330 | TTM_ASSERT_LOCKED(&bo->mutex); | |
331 | bo->ttm = NULL; | |
332 | ||
ad49f501 DA |
333 | if (bdev->need_dma32) |
334 | page_flags |= TTM_PAGE_FLAG_DMA32; | |
335 | ||
ba4e7d97 TH |
336 | switch (bo->type) { |
337 | case ttm_bo_type_device: | |
338 | if (zero_alloc) | |
339 | page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; | |
340 | case ttm_bo_type_kernel: | |
649bf3ca JG |
341 | bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, |
342 | page_flags, glob->dummy_read_page); | |
ba4e7d97 TH |
343 | if (unlikely(bo->ttm == NULL)) |
344 | ret = -ENOMEM; | |
345 | break; | |
ba4e7d97 TH |
346 | default: |
347 | printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); | |
348 | ret = -EINVAL; | |
349 | break; | |
350 | } | |
351 | ||
352 | return ret; | |
353 | } | |
354 | ||
355 | static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, | |
356 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
357 | bool evict, bool interruptible, |
358 | bool no_wait_reserve, bool no_wait_gpu) | |
ba4e7d97 TH |
359 | { |
360 | struct ttm_bo_device *bdev = bo->bdev; | |
361 | bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); | |
362 | bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); | |
363 | struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; | |
364 | struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; | |
365 | int ret = 0; | |
366 | ||
367 | if (old_is_pci || new_is_pci || | |
eba67093 TH |
368 | ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { |
369 | ret = ttm_mem_io_lock(old_man, true); | |
370 | if (unlikely(ret != 0)) | |
371 | goto out_err; | |
372 | ttm_bo_unmap_virtual_locked(bo); | |
373 | ttm_mem_io_unlock(old_man); | |
374 | } | |
ba4e7d97 TH |
375 | |
376 | /* | |
377 | * Create and bind a ttm if required. | |
378 | */ | |
379 | ||
8d3bb236 BS |
380 | if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
381 | if (bo->ttm == NULL) { | |
ff02b13f BS |
382 | bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); |
383 | ret = ttm_bo_add_ttm(bo, zero); | |
8d3bb236 BS |
384 | if (ret) |
385 | goto out_err; | |
386 | } | |
ba4e7d97 TH |
387 | |
388 | ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); | |
389 | if (ret) | |
87ef9209 | 390 | goto out_err; |
ba4e7d97 TH |
391 | |
392 | if (mem->mem_type != TTM_PL_SYSTEM) { | |
393 | ret = ttm_tt_bind(bo->ttm, mem); | |
394 | if (ret) | |
395 | goto out_err; | |
396 | } | |
397 | ||
398 | if (bo->mem.mem_type == TTM_PL_SYSTEM) { | |
82ef594e BS |
399 | if (bdev->driver->move_notify) |
400 | bdev->driver->move_notify(bo, mem); | |
ca262a99 | 401 | bo->mem = *mem; |
ba4e7d97 | 402 | mem->mm_node = NULL; |
ba4e7d97 TH |
403 | goto moved; |
404 | } | |
ba4e7d97 TH |
405 | } |
406 | ||
407 | if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && | |
408 | !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
9d87fa21 | 409 | ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
410 | else if (bdev->driver->move) |
411 | ret = bdev->driver->move(bo, evict, interruptible, | |
9d87fa21 | 412 | no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 | 413 | else |
9d87fa21 | 414 | ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem); |
ba4e7d97 TH |
415 | |
416 | if (ret) | |
417 | goto out_err; | |
418 | ||
dc97b340 JG |
419 | if (bdev->driver->move_notify) |
420 | bdev->driver->move_notify(bo, mem); | |
421 | ||
ba4e7d97 TH |
422 | moved: |
423 | if (bo->evicted) { | |
424 | ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); | |
425 | if (ret) | |
426 | printk(KERN_ERR TTM_PFX "Can not flush read caches\n"); | |
427 | bo->evicted = false; | |
428 | } | |
429 | ||
430 | if (bo->mem.mm_node) { | |
d961db75 | 431 | bo->offset = (bo->mem.start << PAGE_SHIFT) + |
ba4e7d97 TH |
432 | bdev->man[bo->mem.mem_type].gpu_offset; |
433 | bo->cur_placement = bo->mem.placement; | |
354fb52c TH |
434 | } else |
435 | bo->offset = 0; | |
ba4e7d97 TH |
436 | |
437 | return 0; | |
438 | ||
439 | out_err: | |
440 | new_man = &bdev->man[bo->mem.mem_type]; | |
441 | if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) { | |
442 | ttm_tt_unbind(bo->ttm); | |
443 | ttm_tt_destroy(bo->ttm); | |
444 | bo->ttm = NULL; | |
445 | } | |
446 | ||
447 | return ret; | |
448 | } | |
449 | ||
1df6a2eb | 450 | /** |
40d857bb | 451 | * Call bo::reserved. |
1df6a2eb | 452 | * Will release GPU memory type usage on destruction. |
40d857bb TH |
453 | * This is the place to put in driver specific hooks to release |
454 | * driver private resources. | |
455 | * Will release the bo::reserved lock. | |
1df6a2eb TH |
456 | */ |
457 | ||
458 | static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) | |
459 | { | |
dc97b340 JG |
460 | if (bo->bdev->driver->move_notify) |
461 | bo->bdev->driver->move_notify(bo, NULL); | |
462 | ||
1df6a2eb | 463 | if (bo->ttm) { |
1df6a2eb TH |
464 | ttm_tt_unbind(bo->ttm); |
465 | ttm_tt_destroy(bo->ttm); | |
466 | bo->ttm = NULL; | |
1df6a2eb | 467 | } |
40d857bb | 468 | ttm_bo_mem_put(bo, &bo->mem); |
1df6a2eb TH |
469 | |
470 | atomic_set(&bo->reserved, 0); | |
06fba6d4 TH |
471 | |
472 | /* | |
473 | * Make processes trying to reserve really pick it up. | |
474 | */ | |
475 | smp_mb__after_atomic_dec(); | |
1df6a2eb | 476 | wake_up_all(&bo->event_queue); |
1df6a2eb TH |
477 | } |
478 | ||
e1efc9b6 | 479 | static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
480 | { |
481 | struct ttm_bo_device *bdev = bo->bdev; | |
a987fcaa | 482 | struct ttm_bo_global *glob = bo->glob; |
e1efc9b6 | 483 | struct ttm_bo_driver *driver; |
aa123268 | 484 | void *sync_obj = NULL; |
e1efc9b6 TH |
485 | void *sync_obj_arg; |
486 | int put_count; | |
ba4e7d97 TH |
487 | int ret; |
488 | ||
702adba2 | 489 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 490 | (void) ttm_bo_wait(bo, false, false, true); |
ba4e7d97 | 491 | if (!bo->sync_obj) { |
ba4e7d97 | 492 | |
a987fcaa | 493 | spin_lock(&glob->lru_lock); |
aaa20736 | 494 | |
1df6a2eb | 495 | /** |
702adba2 | 496 | * Lock inversion between bo:reserve and bdev::fence_lock here, |
e1efc9b6 | 497 | * but that's OK, since we're only trylocking. |
1df6a2eb TH |
498 | */ |
499 | ||
e1efc9b6 | 500 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); |
1df6a2eb | 501 | |
e1efc9b6 TH |
502 | if (unlikely(ret == -EBUSY)) |
503 | goto queue; | |
1df6a2eb | 504 | |
702adba2 | 505 | spin_unlock(&bdev->fence_lock); |
1df6a2eb | 506 | put_count = ttm_bo_del_from_lru(bo); |
ba4e7d97 | 507 | |
40d857bb | 508 | spin_unlock(&glob->lru_lock); |
1df6a2eb | 509 | ttm_bo_cleanup_memtype_use(bo); |
ba4e7d97 | 510 | |
d6ea8886 | 511 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 | 512 | |
e1efc9b6 TH |
513 | return; |
514 | } else { | |
515 | spin_lock(&glob->lru_lock); | |
ba4e7d97 | 516 | } |
e1efc9b6 | 517 | queue: |
e1efc9b6 | 518 | driver = bdev->driver; |
aa123268 TH |
519 | if (bo->sync_obj) |
520 | sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
521 | sync_obj_arg = bo->sync_obj_arg; | |
e1efc9b6 TH |
522 | |
523 | kref_get(&bo->list_kref); | |
524 | list_add_tail(&bo->ddestroy, &bdev->ddestroy); | |
525 | spin_unlock(&glob->lru_lock); | |
702adba2 | 526 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 | 527 | |
aa123268 | 528 | if (sync_obj) { |
e1efc9b6 | 529 | driver->sync_obj_flush(sync_obj, sync_obj_arg); |
aa123268 TH |
530 | driver->sync_obj_unref(&sync_obj); |
531 | } | |
e1efc9b6 TH |
532 | schedule_delayed_work(&bdev->wq, |
533 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
534 | } | |
535 | ||
536 | /** | |
537 | * function ttm_bo_cleanup_refs | |
538 | * If bo idle, remove from delayed- and lru lists, and unref. | |
539 | * If not idle, do nothing. | |
540 | * | |
541 | * @interruptible Any sleeps should occur interruptibly. | |
542 | * @no_wait_reserve Never wait for reserve. Return -EBUSY instead. | |
543 | * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. | |
544 | */ | |
545 | ||
546 | static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, | |
547 | bool interruptible, | |
548 | bool no_wait_reserve, | |
549 | bool no_wait_gpu) | |
550 | { | |
702adba2 | 551 | struct ttm_bo_device *bdev = bo->bdev; |
e1efc9b6 TH |
552 | struct ttm_bo_global *glob = bo->glob; |
553 | int put_count; | |
554 | int ret = 0; | |
555 | ||
556 | retry: | |
702adba2 | 557 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 558 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 559 | spin_unlock(&bdev->fence_lock); |
e1efc9b6 TH |
560 | |
561 | if (unlikely(ret != 0)) | |
562 | return ret; | |
563 | ||
a987fcaa | 564 | spin_lock(&glob->lru_lock); |
26cc40a8 TH |
565 | |
566 | if (unlikely(list_empty(&bo->ddestroy))) { | |
567 | spin_unlock(&glob->lru_lock); | |
568 | return 0; | |
569 | } | |
570 | ||
e1efc9b6 TH |
571 | ret = ttm_bo_reserve_locked(bo, interruptible, |
572 | no_wait_reserve, false, 0); | |
ba4e7d97 | 573 | |
26cc40a8 | 574 | if (unlikely(ret != 0)) { |
a987fcaa | 575 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
576 | return ret; |
577 | } | |
ba4e7d97 | 578 | |
e1efc9b6 TH |
579 | /** |
580 | * We can re-check for sync object without taking | |
581 | * the bo::lock since setting the sync object requires | |
582 | * also bo::reserved. A busy object at this point may | |
583 | * be caused by another thread recently starting an accelerated | |
584 | * eviction. | |
585 | */ | |
ba4e7d97 | 586 | |
e1efc9b6 TH |
587 | if (unlikely(bo->sync_obj)) { |
588 | atomic_set(&bo->reserved, 0); | |
589 | wake_up_all(&bo->event_queue); | |
a987fcaa | 590 | spin_unlock(&glob->lru_lock); |
e1efc9b6 | 591 | goto retry; |
ba4e7d97 TH |
592 | } |
593 | ||
e1efc9b6 TH |
594 | put_count = ttm_bo_del_from_lru(bo); |
595 | list_del_init(&bo->ddestroy); | |
596 | ++put_count; | |
597 | ||
598 | spin_unlock(&glob->lru_lock); | |
599 | ttm_bo_cleanup_memtype_use(bo); | |
600 | ||
d6ea8886 | 601 | ttm_bo_list_ref_sub(bo, put_count, true); |
e1efc9b6 TH |
602 | |
603 | return 0; | |
ba4e7d97 TH |
604 | } |
605 | ||
606 | /** | |
607 | * Traverse the delayed list, and call ttm_bo_cleanup_refs on all | |
608 | * encountered buffers. | |
609 | */ | |
610 | ||
611 | static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) | |
612 | { | |
a987fcaa | 613 | struct ttm_bo_global *glob = bdev->glob; |
1a961ce0 LB |
614 | struct ttm_buffer_object *entry = NULL; |
615 | int ret = 0; | |
ba4e7d97 | 616 | |
a987fcaa | 617 | spin_lock(&glob->lru_lock); |
1a961ce0 LB |
618 | if (list_empty(&bdev->ddestroy)) |
619 | goto out_unlock; | |
620 | ||
621 | entry = list_first_entry(&bdev->ddestroy, | |
622 | struct ttm_buffer_object, ddestroy); | |
623 | kref_get(&entry->list_kref); | |
624 | ||
625 | for (;;) { | |
626 | struct ttm_buffer_object *nentry = NULL; | |
627 | ||
628 | if (entry->ddestroy.next != &bdev->ddestroy) { | |
629 | nentry = list_first_entry(&entry->ddestroy, | |
630 | struct ttm_buffer_object, ddestroy); | |
ba4e7d97 TH |
631 | kref_get(&nentry->list_kref); |
632 | } | |
ba4e7d97 | 633 | |
a987fcaa | 634 | spin_unlock(&glob->lru_lock); |
e1efc9b6 TH |
635 | ret = ttm_bo_cleanup_refs(entry, false, !remove_all, |
636 | !remove_all); | |
ba4e7d97 | 637 | kref_put(&entry->list_kref, ttm_bo_release_list); |
1a961ce0 LB |
638 | entry = nentry; |
639 | ||
640 | if (ret || !entry) | |
641 | goto out; | |
ba4e7d97 | 642 | |
a987fcaa | 643 | spin_lock(&glob->lru_lock); |
1a961ce0 | 644 | if (list_empty(&entry->ddestroy)) |
ba4e7d97 TH |
645 | break; |
646 | } | |
ba4e7d97 | 647 | |
1a961ce0 LB |
648 | out_unlock: |
649 | spin_unlock(&glob->lru_lock); | |
650 | out: | |
651 | if (entry) | |
652 | kref_put(&entry->list_kref, ttm_bo_release_list); | |
ba4e7d97 TH |
653 | return ret; |
654 | } | |
655 | ||
656 | static void ttm_bo_delayed_workqueue(struct work_struct *work) | |
657 | { | |
658 | struct ttm_bo_device *bdev = | |
659 | container_of(work, struct ttm_bo_device, wq.work); | |
660 | ||
661 | if (ttm_bo_delayed_delete(bdev, false)) { | |
662 | schedule_delayed_work(&bdev->wq, | |
663 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
664 | } | |
665 | } | |
666 | ||
667 | static void ttm_bo_release(struct kref *kref) | |
668 | { | |
669 | struct ttm_buffer_object *bo = | |
670 | container_of(kref, struct ttm_buffer_object, kref); | |
671 | struct ttm_bo_device *bdev = bo->bdev; | |
eba67093 | 672 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
ba4e7d97 TH |
673 | |
674 | if (likely(bo->vm_node != NULL)) { | |
675 | rb_erase(&bo->vm_rb, &bdev->addr_space_rb); | |
676 | drm_mm_put_block(bo->vm_node); | |
677 | bo->vm_node = NULL; | |
678 | } | |
679 | write_unlock(&bdev->vm_lock); | |
eba67093 TH |
680 | ttm_mem_io_lock(man, false); |
681 | ttm_mem_io_free_vm(bo); | |
682 | ttm_mem_io_unlock(man); | |
e1efc9b6 | 683 | ttm_bo_cleanup_refs_or_queue(bo); |
ba4e7d97 TH |
684 | kref_put(&bo->list_kref, ttm_bo_release_list); |
685 | write_lock(&bdev->vm_lock); | |
686 | } | |
687 | ||
688 | void ttm_bo_unref(struct ttm_buffer_object **p_bo) | |
689 | { | |
690 | struct ttm_buffer_object *bo = *p_bo; | |
691 | struct ttm_bo_device *bdev = bo->bdev; | |
692 | ||
693 | *p_bo = NULL; | |
694 | write_lock(&bdev->vm_lock); | |
695 | kref_put(&bo->kref, ttm_bo_release); | |
696 | write_unlock(&bdev->vm_lock); | |
697 | } | |
698 | EXPORT_SYMBOL(ttm_bo_unref); | |
699 | ||
7c5ee536 MG |
700 | int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
701 | { | |
702 | return cancel_delayed_work_sync(&bdev->wq); | |
703 | } | |
704 | EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); | |
705 | ||
706 | void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) | |
707 | { | |
708 | if (resched) | |
709 | schedule_delayed_work(&bdev->wq, | |
710 | ((HZ / 100) < 1) ? 1 : HZ / 100); | |
711 | } | |
712 | EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); | |
713 | ||
ca262a99 | 714 | static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
9d87fa21 | 715 | bool no_wait_reserve, bool no_wait_gpu) |
ba4e7d97 | 716 | { |
ba4e7d97 TH |
717 | struct ttm_bo_device *bdev = bo->bdev; |
718 | struct ttm_mem_reg evict_mem; | |
ca262a99 JG |
719 | struct ttm_placement placement; |
720 | int ret = 0; | |
ba4e7d97 | 721 | |
702adba2 | 722 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 723 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 724 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 | 725 | |
78ecf091 | 726 | if (unlikely(ret != 0)) { |
98ffc415 | 727 | if (ret != -ERESTARTSYS) { |
78ecf091 TH |
728 | printk(KERN_ERR TTM_PFX |
729 | "Failed to expire sync object before " | |
730 | "buffer eviction.\n"); | |
731 | } | |
ba4e7d97 TH |
732 | goto out; |
733 | } | |
734 | ||
735 | BUG_ON(!atomic_read(&bo->reserved)); | |
736 | ||
737 | evict_mem = bo->mem; | |
738 | evict_mem.mm_node = NULL; | |
eba67093 TH |
739 | evict_mem.bus.io_reserved_vm = false; |
740 | evict_mem.bus.io_reserved_count = 0; | |
ba4e7d97 | 741 | |
7cb7d1d7 JG |
742 | placement.fpfn = 0; |
743 | placement.lpfn = 0; | |
744 | placement.num_placement = 0; | |
745 | placement.num_busy_placement = 0; | |
ca262a99 JG |
746 | bdev->driver->evict_flags(bo, &placement); |
747 | ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, | |
9d87fa21 | 748 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 749 | if (ret) { |
fb53f862 | 750 | if (ret != -ERESTARTSYS) { |
ba4e7d97 TH |
751 | printk(KERN_ERR TTM_PFX |
752 | "Failed to find memory space for " | |
753 | "buffer 0x%p eviction.\n", bo); | |
fb53f862 JG |
754 | ttm_bo_mem_space_debug(bo, &placement); |
755 | } | |
ba4e7d97 TH |
756 | goto out; |
757 | } | |
758 | ||
759 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, | |
9d87fa21 | 760 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 761 | if (ret) { |
98ffc415 | 762 | if (ret != -ERESTARTSYS) |
ba4e7d97 | 763 | printk(KERN_ERR TTM_PFX "Buffer eviction failed\n"); |
42311ff9 | 764 | ttm_bo_mem_put(bo, &evict_mem); |
ba4e7d97 TH |
765 | goto out; |
766 | } | |
ca262a99 JG |
767 | bo->evicted = true; |
768 | out: | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static int ttm_mem_evict_first(struct ttm_bo_device *bdev, | |
773 | uint32_t mem_type, | |
9d87fa21 JG |
774 | bool interruptible, bool no_wait_reserve, |
775 | bool no_wait_gpu) | |
ca262a99 JG |
776 | { |
777 | struct ttm_bo_global *glob = bdev->glob; | |
778 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
779 | struct ttm_buffer_object *bo; | |
780 | int ret, put_count = 0; | |
ba4e7d97 | 781 | |
9c51ba1d | 782 | retry: |
a987fcaa | 783 | spin_lock(&glob->lru_lock); |
9c51ba1d TH |
784 | if (list_empty(&man->lru)) { |
785 | spin_unlock(&glob->lru_lock); | |
786 | return -EBUSY; | |
787 | } | |
788 | ||
ca262a99 JG |
789 | bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru); |
790 | kref_get(&bo->list_kref); | |
9c51ba1d | 791 | |
e1efc9b6 TH |
792 | if (!list_empty(&bo->ddestroy)) { |
793 | spin_unlock(&glob->lru_lock); | |
794 | ret = ttm_bo_cleanup_refs(bo, interruptible, | |
795 | no_wait_reserve, no_wait_gpu); | |
796 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
797 | ||
798 | if (likely(ret == 0 || ret == -ERESTARTSYS)) | |
799 | return ret; | |
800 | ||
801 | goto retry; | |
802 | } | |
803 | ||
9d87fa21 | 804 | ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0); |
9c51ba1d TH |
805 | |
806 | if (unlikely(ret == -EBUSY)) { | |
807 | spin_unlock(&glob->lru_lock); | |
9d87fa21 | 808 | if (likely(!no_wait_gpu)) |
9c51ba1d TH |
809 | ret = ttm_bo_wait_unreserved(bo, interruptible); |
810 | ||
811 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
812 | ||
813 | /** | |
814 | * We *need* to retry after releasing the lru lock. | |
815 | */ | |
816 | ||
817 | if (unlikely(ret != 0)) | |
818 | return ret; | |
819 | goto retry; | |
820 | } | |
821 | ||
822 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 823 | spin_unlock(&glob->lru_lock); |
9c51ba1d TH |
824 | |
825 | BUG_ON(ret != 0); | |
826 | ||
d6ea8886 | 827 | ttm_bo_list_ref_sub(bo, put_count, true); |
9c51ba1d | 828 | |
9d87fa21 | 829 | ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 830 | ttm_bo_unreserve(bo); |
9c51ba1d | 831 | |
ca262a99 | 832 | kref_put(&bo->list_kref, ttm_bo_release_list); |
ba4e7d97 TH |
833 | return ret; |
834 | } | |
835 | ||
42311ff9 BS |
836 | void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
837 | { | |
d961db75 | 838 | struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
42311ff9 | 839 | |
d961db75 BS |
840 | if (mem->mm_node) |
841 | (*man->func->put_node)(man, mem); | |
42311ff9 BS |
842 | } |
843 | EXPORT_SYMBOL(ttm_bo_mem_put); | |
844 | ||
ba4e7d97 TH |
845 | /** |
846 | * Repeatedly evict memory from the LRU for @mem_type until we create enough | |
847 | * space, or we've evicted everything and there isn't enough space. | |
848 | */ | |
ca262a99 JG |
849 | static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
850 | uint32_t mem_type, | |
851 | struct ttm_placement *placement, | |
852 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
853 | bool interruptible, |
854 | bool no_wait_reserve, | |
855 | bool no_wait_gpu) | |
ba4e7d97 | 856 | { |
ca262a99 | 857 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 | 858 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
ba4e7d97 TH |
859 | int ret; |
860 | ||
ba4e7d97 | 861 | do { |
d961db75 | 862 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
863 | if (unlikely(ret != 0)) |
864 | return ret; | |
d961db75 | 865 | if (mem->mm_node) |
ba4e7d97 | 866 | break; |
ca262a99 | 867 | ret = ttm_mem_evict_first(bdev, mem_type, interruptible, |
9d87fa21 | 868 | no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
869 | if (unlikely(ret != 0)) |
870 | return ret; | |
ba4e7d97 | 871 | } while (1); |
d961db75 | 872 | if (mem->mm_node == NULL) |
ba4e7d97 | 873 | return -ENOMEM; |
ba4e7d97 TH |
874 | mem->mem_type = mem_type; |
875 | return 0; | |
876 | } | |
877 | ||
ae3e8122 TH |
878 | static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
879 | uint32_t cur_placement, | |
880 | uint32_t proposed_placement) | |
881 | { | |
882 | uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; | |
883 | uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; | |
884 | ||
885 | /** | |
886 | * Keep current caching if possible. | |
887 | */ | |
888 | ||
889 | if ((cur_placement & caching) != 0) | |
890 | result |= (cur_placement & caching); | |
891 | else if ((man->default_caching & caching) != 0) | |
892 | result |= man->default_caching; | |
893 | else if ((TTM_PL_FLAG_CACHED & caching) != 0) | |
894 | result |= TTM_PL_FLAG_CACHED; | |
895 | else if ((TTM_PL_FLAG_WC & caching) != 0) | |
896 | result |= TTM_PL_FLAG_WC; | |
897 | else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) | |
898 | result |= TTM_PL_FLAG_UNCACHED; | |
899 | ||
900 | return result; | |
901 | } | |
902 | ||
ba4e7d97 | 903 | static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
ba4e7d97 | 904 | uint32_t mem_type, |
ae3e8122 TH |
905 | uint32_t proposed_placement, |
906 | uint32_t *masked_placement) | |
ba4e7d97 TH |
907 | { |
908 | uint32_t cur_flags = ttm_bo_type_flags(mem_type); | |
909 | ||
ae3e8122 | 910 | if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
ba4e7d97 TH |
911 | return false; |
912 | ||
ae3e8122 | 913 | if ((proposed_placement & man->available_caching) == 0) |
ba4e7d97 | 914 | return false; |
ba4e7d97 | 915 | |
ae3e8122 TH |
916 | cur_flags |= (proposed_placement & man->available_caching); |
917 | ||
918 | *masked_placement = cur_flags; | |
ba4e7d97 TH |
919 | return true; |
920 | } | |
921 | ||
922 | /** | |
923 | * Creates space for memory region @mem according to its type. | |
924 | * | |
925 | * This function first searches for free space in compatible memory types in | |
926 | * the priority order defined by the driver. If free space isn't found, then | |
927 | * ttm_bo_mem_force_space is attempted in priority order to evict and find | |
928 | * space. | |
929 | */ | |
930 | int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
931 | struct ttm_placement *placement, |
932 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
933 | bool interruptible, bool no_wait_reserve, |
934 | bool no_wait_gpu) | |
ba4e7d97 TH |
935 | { |
936 | struct ttm_bo_device *bdev = bo->bdev; | |
937 | struct ttm_mem_type_manager *man; | |
ba4e7d97 TH |
938 | uint32_t mem_type = TTM_PL_SYSTEM; |
939 | uint32_t cur_flags = 0; | |
940 | bool type_found = false; | |
941 | bool type_ok = false; | |
98ffc415 | 942 | bool has_erestartsys = false; |
ca262a99 | 943 | int i, ret; |
ba4e7d97 TH |
944 | |
945 | mem->mm_node = NULL; | |
b6637526 | 946 | for (i = 0; i < placement->num_placement; ++i) { |
ca262a99 JG |
947 | ret = ttm_mem_type_from_flags(placement->placement[i], |
948 | &mem_type); | |
949 | if (ret) | |
950 | return ret; | |
ba4e7d97 TH |
951 | man = &bdev->man[mem_type]; |
952 | ||
953 | type_ok = ttm_bo_mt_compatible(man, | |
ca262a99 JG |
954 | mem_type, |
955 | placement->placement[i], | |
956 | &cur_flags); | |
ba4e7d97 TH |
957 | |
958 | if (!type_ok) | |
959 | continue; | |
960 | ||
ae3e8122 TH |
961 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
962 | cur_flags); | |
ca262a99 JG |
963 | /* |
964 | * Use the access and other non-mapping-related flag bits from | |
965 | * the memory placement flags to the current flags | |
966 | */ | |
967 | ttm_flag_masked(&cur_flags, placement->placement[i], | |
968 | ~TTM_PL_MASK_MEMTYPE); | |
ae3e8122 | 969 | |
ba4e7d97 TH |
970 | if (mem_type == TTM_PL_SYSTEM) |
971 | break; | |
972 | ||
973 | if (man->has_type && man->use_type) { | |
974 | type_found = true; | |
d961db75 | 975 | ret = (*man->func->get_node)(man, bo, placement, mem); |
ca262a99 JG |
976 | if (unlikely(ret)) |
977 | return ret; | |
ba4e7d97 | 978 | } |
d961db75 | 979 | if (mem->mm_node) |
ba4e7d97 TH |
980 | break; |
981 | } | |
982 | ||
d961db75 | 983 | if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
ba4e7d97 TH |
984 | mem->mem_type = mem_type; |
985 | mem->placement = cur_flags; | |
986 | return 0; | |
987 | } | |
988 | ||
989 | if (!type_found) | |
990 | return -EINVAL; | |
991 | ||
b6637526 DA |
992 | for (i = 0; i < placement->num_busy_placement; ++i) { |
993 | ret = ttm_mem_type_from_flags(placement->busy_placement[i], | |
ca262a99 JG |
994 | &mem_type); |
995 | if (ret) | |
996 | return ret; | |
ba4e7d97 | 997 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
998 | if (!man->has_type) |
999 | continue; | |
ba4e7d97 | 1000 | if (!ttm_bo_mt_compatible(man, |
ca262a99 | 1001 | mem_type, |
b6637526 | 1002 | placement->busy_placement[i], |
ca262a99 | 1003 | &cur_flags)) |
ba4e7d97 TH |
1004 | continue; |
1005 | ||
ae3e8122 TH |
1006 | cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
1007 | cur_flags); | |
ca262a99 JG |
1008 | /* |
1009 | * Use the access and other non-mapping-related flag bits from | |
1010 | * the memory placement flags to the current flags | |
1011 | */ | |
b6637526 | 1012 | ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
ca262a99 | 1013 | ~TTM_PL_MASK_MEMTYPE); |
ae3e8122 | 1014 | |
0eaddb28 TH |
1015 | |
1016 | if (mem_type == TTM_PL_SYSTEM) { | |
1017 | mem->mem_type = mem_type; | |
1018 | mem->placement = cur_flags; | |
1019 | mem->mm_node = NULL; | |
1020 | return 0; | |
1021 | } | |
1022 | ||
ca262a99 | 1023 | ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
9d87fa21 | 1024 | interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1025 | if (ret == 0 && mem->mm_node) { |
1026 | mem->placement = cur_flags; | |
1027 | return 0; | |
1028 | } | |
98ffc415 TH |
1029 | if (ret == -ERESTARTSYS) |
1030 | has_erestartsys = true; | |
ba4e7d97 | 1031 | } |
98ffc415 | 1032 | ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
ba4e7d97 TH |
1033 | return ret; |
1034 | } | |
1035 | EXPORT_SYMBOL(ttm_bo_mem_space); | |
1036 | ||
1037 | int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait) | |
1038 | { | |
ba4e7d97 TH |
1039 | if ((atomic_read(&bo->cpu_writers) > 0) && no_wait) |
1040 | return -EBUSY; | |
1041 | ||
98ffc415 TH |
1042 | return wait_event_interruptible(bo->event_queue, |
1043 | atomic_read(&bo->cpu_writers) == 0); | |
ba4e7d97 | 1044 | } |
d1ede145 | 1045 | EXPORT_SYMBOL(ttm_bo_wait_cpu); |
ba4e7d97 TH |
1046 | |
1047 | int ttm_bo_move_buffer(struct ttm_buffer_object *bo, | |
ca262a99 | 1048 | struct ttm_placement *placement, |
9d87fa21 JG |
1049 | bool interruptible, bool no_wait_reserve, |
1050 | bool no_wait_gpu) | |
ba4e7d97 | 1051 | { |
ba4e7d97 TH |
1052 | int ret = 0; |
1053 | struct ttm_mem_reg mem; | |
702adba2 | 1054 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1055 | |
1056 | BUG_ON(!atomic_read(&bo->reserved)); | |
1057 | ||
1058 | /* | |
1059 | * FIXME: It's possible to pipeline buffer moves. | |
1060 | * Have the driver move function wait for idle when necessary, | |
1061 | * instead of doing it here. | |
1062 | */ | |
702adba2 | 1063 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1064 | ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
702adba2 | 1065 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1066 | if (ret) |
1067 | return ret; | |
ba4e7d97 TH |
1068 | mem.num_pages = bo->num_pages; |
1069 | mem.size = mem.num_pages << PAGE_SHIFT; | |
1070 | mem.page_alignment = bo->mem.page_alignment; | |
eba67093 TH |
1071 | mem.bus.io_reserved_vm = false; |
1072 | mem.bus.io_reserved_count = 0; | |
ba4e7d97 TH |
1073 | /* |
1074 | * Determine where to move the buffer. | |
1075 | */ | |
9d87fa21 | 1076 | ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 TH |
1077 | if (ret) |
1078 | goto out_unlock; | |
9d87fa21 | 1079 | ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu); |
ba4e7d97 | 1080 | out_unlock: |
d961db75 BS |
1081 | if (ret && mem.mm_node) |
1082 | ttm_bo_mem_put(bo, &mem); | |
ba4e7d97 TH |
1083 | return ret; |
1084 | } | |
1085 | ||
ca262a99 | 1086 | static int ttm_bo_mem_compat(struct ttm_placement *placement, |
ba4e7d97 TH |
1087 | struct ttm_mem_reg *mem) |
1088 | { | |
ca262a99 | 1089 | int i; |
e22238ea | 1090 | |
d961db75 BS |
1091 | if (mem->mm_node && placement->lpfn != 0 && |
1092 | (mem->start < placement->fpfn || | |
1093 | mem->start + mem->num_pages > placement->lpfn)) | |
e22238ea | 1094 | return -1; |
ca262a99 JG |
1095 | |
1096 | for (i = 0; i < placement->num_placement; i++) { | |
1097 | if ((placement->placement[i] & mem->placement & | |
1098 | TTM_PL_MASK_CACHING) && | |
1099 | (placement->placement[i] & mem->placement & | |
1100 | TTM_PL_MASK_MEM)) | |
1101 | return i; | |
1102 | } | |
1103 | return -1; | |
ba4e7d97 TH |
1104 | } |
1105 | ||
09855acb JG |
1106 | int ttm_bo_validate(struct ttm_buffer_object *bo, |
1107 | struct ttm_placement *placement, | |
9d87fa21 JG |
1108 | bool interruptible, bool no_wait_reserve, |
1109 | bool no_wait_gpu) | |
ba4e7d97 TH |
1110 | { |
1111 | int ret; | |
1112 | ||
1113 | BUG_ON(!atomic_read(&bo->reserved)); | |
ca262a99 JG |
1114 | /* Check that range is valid */ |
1115 | if (placement->lpfn || placement->fpfn) | |
1116 | if (placement->fpfn > placement->lpfn || | |
1117 | (placement->lpfn - placement->fpfn) < bo->num_pages) | |
1118 | return -EINVAL; | |
ba4e7d97 TH |
1119 | /* |
1120 | * Check whether we need to move buffer. | |
1121 | */ | |
ca262a99 JG |
1122 | ret = ttm_bo_mem_compat(placement, &bo->mem); |
1123 | if (ret < 0) { | |
9d87fa21 | 1124 | ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); |
ca262a99 | 1125 | if (ret) |
ba4e7d97 | 1126 | return ret; |
ca262a99 JG |
1127 | } else { |
1128 | /* | |
1129 | * Use the access and other non-mapping-related flag bits from | |
1130 | * the compatible memory placement flags to the active flags | |
1131 | */ | |
1132 | ttm_flag_masked(&bo->mem.placement, placement->placement[ret], | |
1133 | ~TTM_PL_MASK_MEMTYPE); | |
ba4e7d97 | 1134 | } |
ba4e7d97 TH |
1135 | /* |
1136 | * We might need to add a TTM. | |
1137 | */ | |
ba4e7d97 TH |
1138 | if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
1139 | ret = ttm_bo_add_ttm(bo, true); | |
1140 | if (ret) | |
1141 | return ret; | |
1142 | } | |
ba4e7d97 TH |
1143 | return 0; |
1144 | } | |
09855acb | 1145 | EXPORT_SYMBOL(ttm_bo_validate); |
ba4e7d97 | 1146 | |
09855acb JG |
1147 | int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
1148 | struct ttm_placement *placement) | |
ba4e7d97 | 1149 | { |
29e190e0 TH |
1150 | BUG_ON((placement->fpfn || placement->lpfn) && |
1151 | (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); | |
ba4e7d97 | 1152 | |
ba4e7d97 TH |
1153 | return 0; |
1154 | } | |
1155 | ||
09855acb JG |
1156 | int ttm_bo_init(struct ttm_bo_device *bdev, |
1157 | struct ttm_buffer_object *bo, | |
1158 | unsigned long size, | |
1159 | enum ttm_bo_type type, | |
1160 | struct ttm_placement *placement, | |
1161 | uint32_t page_alignment, | |
1162 | unsigned long buffer_start, | |
1163 | bool interruptible, | |
5df23979 | 1164 | struct file *persistent_swap_storage, |
09855acb JG |
1165 | size_t acc_size, |
1166 | void (*destroy) (struct ttm_buffer_object *)) | |
ba4e7d97 | 1167 | { |
09855acb | 1168 | int ret = 0; |
ba4e7d97 | 1169 | unsigned long num_pages; |
57de4ba9 JG |
1170 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
1171 | ||
1172 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); | |
1173 | if (ret) { | |
1174 | printk(KERN_ERR TTM_PFX "Out of kernel memory.\n"); | |
1175 | if (destroy) | |
1176 | (*destroy)(bo); | |
1177 | else | |
1178 | kfree(bo); | |
1179 | return -ENOMEM; | |
1180 | } | |
ba4e7d97 TH |
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 | |
57de4ba9 JG |
1251 | size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, |
1252 | unsigned long bo_size, | |
1253 | unsigned struct_size) | |
ba4e7d97 | 1254 | { |
57de4ba9 JG |
1255 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
1256 | size_t size = 0; | |
ba4e7d97 | 1257 | |
57de4ba9 JG |
1258 | size += ttm_round_pot(struct_size); |
1259 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1260 | size += ttm_round_pot(sizeof(struct ttm_tt)); | |
1261 | return size; | |
ba4e7d97 | 1262 | } |
57de4ba9 JG |
1263 | EXPORT_SYMBOL(ttm_bo_acc_size); |
1264 | ||
1265 | size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, | |
1266 | unsigned long bo_size, | |
1267 | unsigned struct_size) | |
1268 | { | |
1269 | unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; | |
1270 | size_t size = 0; | |
1271 | ||
1272 | size += ttm_round_pot(struct_size); | |
1273 | size += PAGE_ALIGN(npages * sizeof(void *)); | |
1274 | size += PAGE_ALIGN(npages * sizeof(dma_addr_t)); | |
1275 | size += ttm_round_pot(sizeof(struct ttm_dma_tt)); | |
1276 | return size; | |
1277 | } | |
1278 | EXPORT_SYMBOL(ttm_bo_dma_acc_size); | |
ba4e7d97 | 1279 | |
09855acb JG |
1280 | int ttm_bo_create(struct ttm_bo_device *bdev, |
1281 | unsigned long size, | |
1282 | enum ttm_bo_type type, | |
1283 | struct ttm_placement *placement, | |
1284 | uint32_t page_alignment, | |
1285 | unsigned long buffer_start, | |
1286 | bool interruptible, | |
5df23979 | 1287 | struct file *persistent_swap_storage, |
09855acb | 1288 | struct ttm_buffer_object **p_bo) |
ba4e7d97 TH |
1289 | { |
1290 | struct ttm_buffer_object *bo; | |
a987fcaa | 1291 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
57de4ba9 | 1292 | size_t acc_size; |
ca262a99 | 1293 | int ret; |
ba4e7d97 | 1294 | |
57de4ba9 | 1295 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); |
5fd9cbad | 1296 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
ba4e7d97 TH |
1297 | if (unlikely(ret != 0)) |
1298 | return ret; | |
1299 | ||
1300 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); | |
1301 | ||
1302 | if (unlikely(bo == NULL)) { | |
5fd9cbad | 1303 | ttm_mem_global_free(mem_glob, acc_size); |
ba4e7d97 TH |
1304 | return -ENOMEM; |
1305 | } | |
1306 | ||
09855acb JG |
1307 | ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
1308 | buffer_start, interruptible, | |
5df23979 | 1309 | persistent_swap_storage, acc_size, NULL); |
ba4e7d97 TH |
1310 | if (likely(ret == 0)) |
1311 | *p_bo = bo; | |
1312 | ||
1313 | return ret; | |
1314 | } | |
4d798937 | 1315 | EXPORT_SYMBOL(ttm_bo_create); |
ba4e7d97 | 1316 | |
ba4e7d97 | 1317 | static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, |
ca262a99 | 1318 | unsigned mem_type, bool allow_errors) |
ba4e7d97 | 1319 | { |
ca262a99 | 1320 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
a987fcaa | 1321 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 | 1322 | int ret; |
ba4e7d97 TH |
1323 | |
1324 | /* | |
1325 | * Can't use standard list traversal since we're unlocking. | |
1326 | */ | |
1327 | ||
a987fcaa | 1328 | spin_lock(&glob->lru_lock); |
ca262a99 | 1329 | while (!list_empty(&man->lru)) { |
a987fcaa | 1330 | spin_unlock(&glob->lru_lock); |
9d87fa21 | 1331 | ret = ttm_mem_evict_first(bdev, mem_type, false, false, false); |
ca262a99 JG |
1332 | if (ret) { |
1333 | if (allow_errors) { | |
1334 | return ret; | |
1335 | } else { | |
1336 | printk(KERN_ERR TTM_PFX | |
1337 | "Cleanup eviction failed\n"); | |
1338 | } | |
1339 | } | |
a987fcaa | 1340 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1341 | } |
a987fcaa | 1342 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1343 | return 0; |
1344 | } | |
1345 | ||
1346 | int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1347 | { | |
c96e7c7a | 1348 | struct ttm_mem_type_manager *man; |
ba4e7d97 TH |
1349 | int ret = -EINVAL; |
1350 | ||
1351 | if (mem_type >= TTM_NUM_MEM_TYPES) { | |
1352 | printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); | |
1353 | return ret; | |
1354 | } | |
c96e7c7a | 1355 | man = &bdev->man[mem_type]; |
ba4e7d97 TH |
1356 | |
1357 | if (!man->has_type) { | |
1358 | printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " | |
1359 | "memory manager type %u\n", mem_type); | |
1360 | return ret; | |
1361 | } | |
1362 | ||
1363 | man->use_type = false; | |
1364 | man->has_type = false; | |
1365 | ||
1366 | ret = 0; | |
1367 | if (mem_type > 0) { | |
ca262a99 | 1368 | ttm_bo_force_list_clean(bdev, mem_type, false); |
ba4e7d97 | 1369 | |
d961db75 | 1370 | ret = (*man->func->takedown)(man); |
ba4e7d97 TH |
1371 | } |
1372 | ||
1373 | return ret; | |
1374 | } | |
1375 | EXPORT_SYMBOL(ttm_bo_clean_mm); | |
1376 | ||
1377 | int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) | |
1378 | { | |
1379 | struct ttm_mem_type_manager *man = &bdev->man[mem_type]; | |
1380 | ||
1381 | if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { | |
1382 | printk(KERN_ERR TTM_PFX | |
1383 | "Illegal memory manager memory type %u.\n", | |
1384 | mem_type); | |
1385 | return -EINVAL; | |
1386 | } | |
1387 | ||
1388 | if (!man->has_type) { | |
1389 | printk(KERN_ERR TTM_PFX | |
1390 | "Memory type %u has not been initialized.\n", | |
1391 | mem_type); | |
1392 | return 0; | |
1393 | } | |
1394 | ||
ca262a99 | 1395 | return ttm_bo_force_list_clean(bdev, mem_type, true); |
ba4e7d97 TH |
1396 | } |
1397 | EXPORT_SYMBOL(ttm_bo_evict_mm); | |
1398 | ||
1399 | int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, | |
ca262a99 | 1400 | unsigned long p_size) |
ba4e7d97 TH |
1401 | { |
1402 | int ret = -EINVAL; | |
1403 | struct ttm_mem_type_manager *man; | |
1404 | ||
dbc4a5b8 | 1405 | BUG_ON(type >= TTM_NUM_MEM_TYPES); |
ba4e7d97 | 1406 | man = &bdev->man[type]; |
dbc4a5b8 | 1407 | BUG_ON(man->has_type); |
eba67093 TH |
1408 | man->io_reserve_fastpath = true; |
1409 | man->use_io_reserve_lru = false; | |
1410 | mutex_init(&man->io_reserve_mutex); | |
1411 | INIT_LIST_HEAD(&man->io_reserve_lru); | |
ba4e7d97 TH |
1412 | |
1413 | ret = bdev->driver->init_mem_type(bdev, type, man); | |
1414 | if (ret) | |
1415 | return ret; | |
d961db75 | 1416 | man->bdev = bdev; |
ba4e7d97 TH |
1417 | |
1418 | ret = 0; | |
1419 | if (type != TTM_PL_SYSTEM) { | |
d961db75 | 1420 | ret = (*man->func->init)(man, p_size); |
ba4e7d97 TH |
1421 | if (ret) |
1422 | return ret; | |
1423 | } | |
1424 | man->has_type = true; | |
1425 | man->use_type = true; | |
1426 | man->size = p_size; | |
1427 | ||
1428 | INIT_LIST_HEAD(&man->lru); | |
1429 | ||
1430 | return 0; | |
1431 | } | |
1432 | EXPORT_SYMBOL(ttm_bo_init_mm); | |
1433 | ||
a987fcaa TH |
1434 | static void ttm_bo_global_kobj_release(struct kobject *kobj) |
1435 | { | |
1436 | struct ttm_bo_global *glob = | |
1437 | container_of(kobj, struct ttm_bo_global, kobj); | |
1438 | ||
a987fcaa TH |
1439 | ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink); |
1440 | __free_page(glob->dummy_read_page); | |
1441 | kfree(glob); | |
1442 | } | |
1443 | ||
ba4420c2 | 1444 | void ttm_bo_global_release(struct drm_global_reference *ref) |
a987fcaa TH |
1445 | { |
1446 | struct ttm_bo_global *glob = ref->object; | |
1447 | ||
1448 | kobject_del(&glob->kobj); | |
1449 | kobject_put(&glob->kobj); | |
1450 | } | |
1451 | EXPORT_SYMBOL(ttm_bo_global_release); | |
1452 | ||
ba4420c2 | 1453 | int ttm_bo_global_init(struct drm_global_reference *ref) |
a987fcaa TH |
1454 | { |
1455 | struct ttm_bo_global_ref *bo_ref = | |
1456 | container_of(ref, struct ttm_bo_global_ref, ref); | |
1457 | struct ttm_bo_global *glob = ref->object; | |
1458 | int ret; | |
1459 | ||
1460 | mutex_init(&glob->device_list_mutex); | |
1461 | spin_lock_init(&glob->lru_lock); | |
1462 | glob->mem_glob = bo_ref->mem_glob; | |
1463 | glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); | |
1464 | ||
1465 | if (unlikely(glob->dummy_read_page == NULL)) { | |
1466 | ret = -ENOMEM; | |
1467 | goto out_no_drp; | |
1468 | } | |
1469 | ||
1470 | INIT_LIST_HEAD(&glob->swap_lru); | |
1471 | INIT_LIST_HEAD(&glob->device_list); | |
1472 | ||
1473 | ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); | |
1474 | ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); | |
1475 | if (unlikely(ret != 0)) { | |
1476 | printk(KERN_ERR TTM_PFX | |
1477 | "Could not register buffer object swapout.\n"); | |
1478 | goto out_no_shrink; | |
1479 | } | |
1480 | ||
a987fcaa TH |
1481 | atomic_set(&glob->bo_count, 0); |
1482 | ||
b642ed06 RD |
1483 | ret = kobject_init_and_add( |
1484 | &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); | |
a987fcaa TH |
1485 | if (unlikely(ret != 0)) |
1486 | kobject_put(&glob->kobj); | |
1487 | return ret; | |
1488 | out_no_shrink: | |
1489 | __free_page(glob->dummy_read_page); | |
1490 | out_no_drp: | |
1491 | kfree(glob); | |
1492 | return ret; | |
1493 | } | |
1494 | EXPORT_SYMBOL(ttm_bo_global_init); | |
1495 | ||
1496 | ||
ba4e7d97 TH |
1497 | int ttm_bo_device_release(struct ttm_bo_device *bdev) |
1498 | { | |
1499 | int ret = 0; | |
1500 | unsigned i = TTM_NUM_MEM_TYPES; | |
1501 | struct ttm_mem_type_manager *man; | |
a987fcaa | 1502 | struct ttm_bo_global *glob = bdev->glob; |
ba4e7d97 TH |
1503 | |
1504 | while (i--) { | |
1505 | man = &bdev->man[i]; | |
1506 | if (man->has_type) { | |
1507 | man->use_type = false; | |
1508 | if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { | |
1509 | ret = -EBUSY; | |
1510 | printk(KERN_ERR TTM_PFX | |
1511 | "DRM memory manager type %d " | |
1512 | "is not clean.\n", i); | |
1513 | } | |
1514 | man->has_type = false; | |
1515 | } | |
1516 | } | |
1517 | ||
a987fcaa TH |
1518 | mutex_lock(&glob->device_list_mutex); |
1519 | list_del(&bdev->device_list); | |
1520 | mutex_unlock(&glob->device_list_mutex); | |
1521 | ||
f094cfc6 | 1522 | cancel_delayed_work_sync(&bdev->wq); |
ba4e7d97 TH |
1523 | |
1524 | while (ttm_bo_delayed_delete(bdev, true)) | |
1525 | ; | |
1526 | ||
a987fcaa | 1527 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1528 | if (list_empty(&bdev->ddestroy)) |
1529 | TTM_DEBUG("Delayed destroy list was clean\n"); | |
1530 | ||
1531 | if (list_empty(&bdev->man[0].lru)) | |
1532 | TTM_DEBUG("Swap list was clean\n"); | |
a987fcaa | 1533 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1534 | |
ba4e7d97 TH |
1535 | BUG_ON(!drm_mm_clean(&bdev->addr_space_mm)); |
1536 | write_lock(&bdev->vm_lock); | |
1537 | drm_mm_takedown(&bdev->addr_space_mm); | |
1538 | write_unlock(&bdev->vm_lock); | |
1539 | ||
ba4e7d97 TH |
1540 | return ret; |
1541 | } | |
1542 | EXPORT_SYMBOL(ttm_bo_device_release); | |
1543 | ||
ba4e7d97 | 1544 | int ttm_bo_device_init(struct ttm_bo_device *bdev, |
a987fcaa TH |
1545 | struct ttm_bo_global *glob, |
1546 | struct ttm_bo_driver *driver, | |
51c8b407 | 1547 | uint64_t file_page_offset, |
ad49f501 | 1548 | bool need_dma32) |
ba4e7d97 TH |
1549 | { |
1550 | int ret = -EINVAL; | |
1551 | ||
ba4e7d97 | 1552 | rwlock_init(&bdev->vm_lock); |
ba4e7d97 | 1553 | bdev->driver = driver; |
ba4e7d97 TH |
1554 | |
1555 | memset(bdev->man, 0, sizeof(bdev->man)); | |
1556 | ||
ba4e7d97 TH |
1557 | /* |
1558 | * Initialize the system memory buffer type. | |
1559 | * Other types need to be driver / IOCTL initialized. | |
1560 | */ | |
ca262a99 | 1561 | ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
ba4e7d97 | 1562 | if (unlikely(ret != 0)) |
a987fcaa | 1563 | goto out_no_sys; |
ba4e7d97 TH |
1564 | |
1565 | bdev->addr_space_rb = RB_ROOT; | |
1566 | ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); | |
1567 | if (unlikely(ret != 0)) | |
a987fcaa | 1568 | goto out_no_addr_mm; |
ba4e7d97 TH |
1569 | |
1570 | INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); | |
1571 | bdev->nice_mode = true; | |
1572 | INIT_LIST_HEAD(&bdev->ddestroy); | |
ba4e7d97 | 1573 | bdev->dev_mapping = NULL; |
a987fcaa | 1574 | bdev->glob = glob; |
ad49f501 | 1575 | bdev->need_dma32 = need_dma32; |
65705962 | 1576 | bdev->val_seq = 0; |
702adba2 | 1577 | spin_lock_init(&bdev->fence_lock); |
a987fcaa TH |
1578 | mutex_lock(&glob->device_list_mutex); |
1579 | list_add_tail(&bdev->device_list, &glob->device_list); | |
1580 | mutex_unlock(&glob->device_list_mutex); | |
ba4e7d97 TH |
1581 | |
1582 | return 0; | |
a987fcaa | 1583 | out_no_addr_mm: |
ba4e7d97 | 1584 | ttm_bo_clean_mm(bdev, 0); |
a987fcaa | 1585 | out_no_sys: |
ba4e7d97 TH |
1586 | return ret; |
1587 | } | |
1588 | EXPORT_SYMBOL(ttm_bo_device_init); | |
1589 | ||
1590 | /* | |
1591 | * buffer object vm functions. | |
1592 | */ | |
1593 | ||
1594 | bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) | |
1595 | { | |
1596 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
1597 | ||
1598 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { | |
1599 | if (mem->mem_type == TTM_PL_SYSTEM) | |
1600 | return false; | |
1601 | ||
1602 | if (man->flags & TTM_MEMTYPE_FLAG_CMA) | |
1603 | return false; | |
1604 | ||
1605 | if (mem->placement & TTM_PL_FLAG_CACHED) | |
1606 | return false; | |
1607 | } | |
1608 | return true; | |
1609 | } | |
1610 | ||
eba67093 | 1611 | void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo) |
ba4e7d97 TH |
1612 | { |
1613 | struct ttm_bo_device *bdev = bo->bdev; | |
1614 | loff_t offset = (loff_t) bo->addr_space_offset; | |
1615 | loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT; | |
1616 | ||
1617 | if (!bdev->dev_mapping) | |
1618 | return; | |
ba4e7d97 | 1619 | unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); |
eba67093 | 1620 | ttm_mem_io_free_vm(bo); |
ba4e7d97 | 1621 | } |
eba67093 TH |
1622 | |
1623 | void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) | |
1624 | { | |
1625 | struct ttm_bo_device *bdev = bo->bdev; | |
1626 | struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; | |
1627 | ||
1628 | ttm_mem_io_lock(man, false); | |
1629 | ttm_bo_unmap_virtual_locked(bo); | |
1630 | ttm_mem_io_unlock(man); | |
ba4e7d97 | 1631 | } |
eba67093 TH |
1632 | |
1633 | ||
e024e110 | 1634 | EXPORT_SYMBOL(ttm_bo_unmap_virtual); |
ba4e7d97 TH |
1635 | |
1636 | static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo) | |
1637 | { | |
1638 | struct ttm_bo_device *bdev = bo->bdev; | |
1639 | struct rb_node **cur = &bdev->addr_space_rb.rb_node; | |
1640 | struct rb_node *parent = NULL; | |
1641 | struct ttm_buffer_object *cur_bo; | |
1642 | unsigned long offset = bo->vm_node->start; | |
1643 | unsigned long cur_offset; | |
1644 | ||
1645 | while (*cur) { | |
1646 | parent = *cur; | |
1647 | cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb); | |
1648 | cur_offset = cur_bo->vm_node->start; | |
1649 | if (offset < cur_offset) | |
1650 | cur = &parent->rb_left; | |
1651 | else if (offset > cur_offset) | |
1652 | cur = &parent->rb_right; | |
1653 | else | |
1654 | BUG(); | |
1655 | } | |
1656 | ||
1657 | rb_link_node(&bo->vm_rb, parent, cur); | |
1658 | rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb); | |
1659 | } | |
1660 | ||
1661 | /** | |
1662 | * ttm_bo_setup_vm: | |
1663 | * | |
1664 | * @bo: the buffer to allocate address space for | |
1665 | * | |
1666 | * Allocate address space in the drm device so that applications | |
1667 | * can mmap the buffer and access the contents. This only | |
1668 | * applies to ttm_bo_type_device objects as others are not | |
1669 | * placed in the drm device address space. | |
1670 | */ | |
1671 | ||
1672 | static int ttm_bo_setup_vm(struct ttm_buffer_object *bo) | |
1673 | { | |
1674 | struct ttm_bo_device *bdev = bo->bdev; | |
1675 | int ret; | |
1676 | ||
1677 | retry_pre_get: | |
1678 | ret = drm_mm_pre_get(&bdev->addr_space_mm); | |
1679 | if (unlikely(ret != 0)) | |
1680 | return ret; | |
1681 | ||
1682 | write_lock(&bdev->vm_lock); | |
1683 | bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm, | |
1684 | bo->mem.num_pages, 0, 0); | |
1685 | ||
1686 | if (unlikely(bo->vm_node == NULL)) { | |
1687 | ret = -ENOMEM; | |
1688 | goto out_unlock; | |
1689 | } | |
1690 | ||
1691 | bo->vm_node = drm_mm_get_block_atomic(bo->vm_node, | |
1692 | bo->mem.num_pages, 0); | |
1693 | ||
1694 | if (unlikely(bo->vm_node == NULL)) { | |
1695 | write_unlock(&bdev->vm_lock); | |
1696 | goto retry_pre_get; | |
1697 | } | |
1698 | ||
1699 | ttm_bo_vm_insert_rb(bo); | |
1700 | write_unlock(&bdev->vm_lock); | |
1701 | bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT; | |
1702 | ||
1703 | return 0; | |
1704 | out_unlock: | |
1705 | write_unlock(&bdev->vm_lock); | |
1706 | return ret; | |
1707 | } | |
1708 | ||
1709 | int ttm_bo_wait(struct ttm_buffer_object *bo, | |
1717c0e2 | 1710 | bool lazy, bool interruptible, bool no_wait) |
ba4e7d97 TH |
1711 | { |
1712 | struct ttm_bo_driver *driver = bo->bdev->driver; | |
702adba2 | 1713 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1714 | void *sync_obj; |
1715 | void *sync_obj_arg; | |
1716 | int ret = 0; | |
1717 | ||
1717c0e2 | 1718 | if (likely(bo->sync_obj == NULL)) |
ba4e7d97 TH |
1719 | return 0; |
1720 | ||
1717c0e2 | 1721 | while (bo->sync_obj) { |
ba4e7d97 | 1722 | |
1717c0e2 DA |
1723 | if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) { |
1724 | void *tmp_obj = bo->sync_obj; | |
1725 | bo->sync_obj = NULL; | |
1726 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
1727 | spin_unlock(&bdev->fence_lock); | |
1728 | driver->sync_obj_unref(&tmp_obj); | |
1729 | spin_lock(&bdev->fence_lock); | |
ba4e7d97 TH |
1730 | continue; |
1731 | } | |
1732 | ||
1733 | if (no_wait) | |
1734 | return -EBUSY; | |
1735 | ||
1717c0e2 | 1736 | sync_obj = driver->sync_obj_ref(bo->sync_obj); |
ba4e7d97 | 1737 | sync_obj_arg = bo->sync_obj_arg; |
702adba2 | 1738 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1739 | ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, |
1740 | lazy, interruptible); | |
1741 | if (unlikely(ret != 0)) { | |
1742 | driver->sync_obj_unref(&sync_obj); | |
702adba2 | 1743 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1744 | return ret; |
1745 | } | |
702adba2 | 1746 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1747 | if (likely(bo->sync_obj == sync_obj && |
ba4e7d97 | 1748 | bo->sync_obj_arg == sync_obj_arg)) { |
1717c0e2 DA |
1749 | void *tmp_obj = bo->sync_obj; |
1750 | bo->sync_obj = NULL; | |
1751 | clear_bit(TTM_BO_PRIV_FLAG_MOVING, | |
1752 | &bo->priv_flags); | |
1753 | spin_unlock(&bdev->fence_lock); | |
1754 | driver->sync_obj_unref(&sync_obj); | |
1755 | driver->sync_obj_unref(&tmp_obj); | |
1756 | spin_lock(&bdev->fence_lock); | |
fee280d3 | 1757 | } else { |
702adba2 | 1758 | spin_unlock(&bdev->fence_lock); |
fee280d3 | 1759 | driver->sync_obj_unref(&sync_obj); |
702adba2 | 1760 | spin_lock(&bdev->fence_lock); |
ba4e7d97 TH |
1761 | } |
1762 | } | |
1763 | return 0; | |
1764 | } | |
1765 | EXPORT_SYMBOL(ttm_bo_wait); | |
1766 | ||
ba4e7d97 TH |
1767 | int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait) |
1768 | { | |
702adba2 | 1769 | struct ttm_bo_device *bdev = bo->bdev; |
ba4e7d97 TH |
1770 | int ret = 0; |
1771 | ||
1772 | /* | |
8cfe92d6 | 1773 | * Using ttm_bo_reserve makes sure the lru lists are updated. |
ba4e7d97 TH |
1774 | */ |
1775 | ||
1776 | ret = ttm_bo_reserve(bo, true, no_wait, false, 0); | |
1777 | if (unlikely(ret != 0)) | |
1778 | return ret; | |
702adba2 | 1779 | spin_lock(&bdev->fence_lock); |
1717c0e2 | 1780 | ret = ttm_bo_wait(bo, false, true, no_wait); |
702adba2 | 1781 | spin_unlock(&bdev->fence_lock); |
ba4e7d97 TH |
1782 | if (likely(ret == 0)) |
1783 | atomic_inc(&bo->cpu_writers); | |
1784 | ttm_bo_unreserve(bo); | |
1785 | return ret; | |
1786 | } | |
d1ede145 | 1787 | EXPORT_SYMBOL(ttm_bo_synccpu_write_grab); |
ba4e7d97 TH |
1788 | |
1789 | void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo) | |
1790 | { | |
1791 | if (atomic_dec_and_test(&bo->cpu_writers)) | |
1792 | wake_up_all(&bo->event_queue); | |
1793 | } | |
d1ede145 | 1794 | EXPORT_SYMBOL(ttm_bo_synccpu_write_release); |
ba4e7d97 TH |
1795 | |
1796 | /** | |
1797 | * A buffer object shrink method that tries to swap out the first | |
1798 | * buffer object on the bo_global::swap_lru list. | |
1799 | */ | |
1800 | ||
1801 | static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) | |
1802 | { | |
a987fcaa TH |
1803 | struct ttm_bo_global *glob = |
1804 | container_of(shrink, struct ttm_bo_global, shrink); | |
ba4e7d97 TH |
1805 | struct ttm_buffer_object *bo; |
1806 | int ret = -EBUSY; | |
1807 | int put_count; | |
1808 | uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); | |
1809 | ||
a987fcaa | 1810 | spin_lock(&glob->lru_lock); |
ba4e7d97 | 1811 | while (ret == -EBUSY) { |
a987fcaa TH |
1812 | if (unlikely(list_empty(&glob->swap_lru))) { |
1813 | spin_unlock(&glob->lru_lock); | |
ba4e7d97 TH |
1814 | return -EBUSY; |
1815 | } | |
1816 | ||
a987fcaa | 1817 | bo = list_first_entry(&glob->swap_lru, |
ba4e7d97 TH |
1818 | struct ttm_buffer_object, swap); |
1819 | kref_get(&bo->list_kref); | |
1820 | ||
e1efc9b6 TH |
1821 | if (!list_empty(&bo->ddestroy)) { |
1822 | spin_unlock(&glob->lru_lock); | |
1823 | (void) ttm_bo_cleanup_refs(bo, false, false, false); | |
1824 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1825 | continue; | |
1826 | } | |
1827 | ||
ba4e7d97 TH |
1828 | /** |
1829 | * Reserve buffer. Since we unlock while sleeping, we need | |
1830 | * to re-check that nobody removed us from the swap-list while | |
1831 | * we slept. | |
1832 | */ | |
1833 | ||
1834 | ret = ttm_bo_reserve_locked(bo, false, true, false, 0); | |
1835 | if (unlikely(ret == -EBUSY)) { | |
a987fcaa | 1836 | spin_unlock(&glob->lru_lock); |
ba4e7d97 TH |
1837 | ttm_bo_wait_unreserved(bo, false); |
1838 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
a987fcaa | 1839 | spin_lock(&glob->lru_lock); |
ba4e7d97 TH |
1840 | } |
1841 | } | |
1842 | ||
1843 | BUG_ON(ret != 0); | |
1844 | put_count = ttm_bo_del_from_lru(bo); | |
a987fcaa | 1845 | spin_unlock(&glob->lru_lock); |
ba4e7d97 | 1846 | |
d6ea8886 | 1847 | ttm_bo_list_ref_sub(bo, put_count, true); |
ba4e7d97 TH |
1848 | |
1849 | /** | |
1850 | * Wait for GPU, then move to system cached. | |
1851 | */ | |
1852 | ||
702adba2 | 1853 | spin_lock(&bo->bdev->fence_lock); |
1717c0e2 | 1854 | ret = ttm_bo_wait(bo, false, false, false); |
702adba2 | 1855 | spin_unlock(&bo->bdev->fence_lock); |
ba4e7d97 TH |
1856 | |
1857 | if (unlikely(ret != 0)) | |
1858 | goto out; | |
1859 | ||
1860 | if ((bo->mem.placement & swap_placement) != swap_placement) { | |
1861 | struct ttm_mem_reg evict_mem; | |
1862 | ||
1863 | evict_mem = bo->mem; | |
1864 | evict_mem.mm_node = NULL; | |
1865 | evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; | |
1866 | evict_mem.mem_type = TTM_PL_SYSTEM; | |
1867 | ||
1868 | ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, | |
9d87fa21 | 1869 | false, false, false); |
ba4e7d97 TH |
1870 | if (unlikely(ret != 0)) |
1871 | goto out; | |
1872 | } | |
1873 | ||
1874 | ttm_bo_unmap_virtual(bo); | |
1875 | ||
1876 | /** | |
1877 | * Swap out. Buffer will be swapped in again as soon as | |
1878 | * anyone tries to access a ttm page. | |
1879 | */ | |
1880 | ||
3f09ea4e TH |
1881 | if (bo->bdev->driver->swap_notify) |
1882 | bo->bdev->driver->swap_notify(bo); | |
1883 | ||
5df23979 | 1884 | ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); |
ba4e7d97 TH |
1885 | out: |
1886 | ||
1887 | /** | |
1888 | * | |
1889 | * Unreserve without putting on LRU to avoid swapping out an | |
1890 | * already swapped buffer. | |
1891 | */ | |
1892 | ||
1893 | atomic_set(&bo->reserved, 0); | |
1894 | wake_up_all(&bo->event_queue); | |
1895 | kref_put(&bo->list_kref, ttm_bo_release_list); | |
1896 | return ret; | |
1897 | } | |
1898 | ||
1899 | void ttm_bo_swapout_all(struct ttm_bo_device *bdev) | |
1900 | { | |
a987fcaa | 1901 | while (ttm_bo_swapout(&bdev->glob->shrink) == 0) |
ba4e7d97 TH |
1902 | ; |
1903 | } | |
e99e1e78 | 1904 | EXPORT_SYMBOL(ttm_bo_swapout_all); |