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1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2007-2009 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_bo_driver.h" | |
32 | #include "ttm/ttm_placement.h" | |
33 | #include <linux/io.h> | |
34 | #include <linux/highmem.h> | |
35 | #include <linux/wait.h> | |
36 | #include <linux/vmalloc.h> | |
37 | #include <linux/version.h> | |
38 | #include <linux/module.h> | |
39 | ||
40 | void ttm_bo_free_old_node(struct ttm_buffer_object *bo) | |
41 | { | |
42 | struct ttm_mem_reg *old_mem = &bo->mem; | |
43 | ||
44 | if (old_mem->mm_node) { | |
45 | spin_lock(&bo->bdev->lru_lock); | |
46 | drm_mm_put_block(old_mem->mm_node); | |
47 | spin_unlock(&bo->bdev->lru_lock); | |
48 | } | |
49 | old_mem->mm_node = NULL; | |
50 | } | |
51 | ||
52 | int ttm_bo_move_ttm(struct ttm_buffer_object *bo, | |
53 | bool evict, bool no_wait, struct ttm_mem_reg *new_mem) | |
54 | { | |
55 | struct ttm_tt *ttm = bo->ttm; | |
56 | struct ttm_mem_reg *old_mem = &bo->mem; | |
57 | uint32_t save_flags = old_mem->placement; | |
58 | int ret; | |
59 | ||
60 | if (old_mem->mem_type != TTM_PL_SYSTEM) { | |
61 | ttm_tt_unbind(ttm); | |
62 | ttm_bo_free_old_node(bo); | |
63 | ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, | |
64 | TTM_PL_MASK_MEM); | |
65 | old_mem->mem_type = TTM_PL_SYSTEM; | |
66 | save_flags = old_mem->placement; | |
67 | } | |
68 | ||
69 | ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); | |
70 | if (unlikely(ret != 0)) | |
71 | return ret; | |
72 | ||
73 | if (new_mem->mem_type != TTM_PL_SYSTEM) { | |
74 | ret = ttm_tt_bind(ttm, new_mem); | |
75 | if (unlikely(ret != 0)) | |
76 | return ret; | |
77 | } | |
78 | ||
79 | *old_mem = *new_mem; | |
80 | new_mem->mm_node = NULL; | |
81 | ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE); | |
82 | return 0; | |
83 | } | |
84 | EXPORT_SYMBOL(ttm_bo_move_ttm); | |
85 | ||
86 | int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, | |
87 | void **virtual) | |
88 | { | |
89 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
90 | unsigned long bus_offset; | |
91 | unsigned long bus_size; | |
92 | unsigned long bus_base; | |
93 | int ret; | |
94 | void *addr; | |
95 | ||
96 | *virtual = NULL; | |
97 | ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset, &bus_size); | |
98 | if (ret || bus_size == 0) | |
99 | return ret; | |
100 | ||
101 | if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) | |
102 | addr = (void *)(((u8 *) man->io_addr) + bus_offset); | |
103 | else { | |
104 | if (mem->placement & TTM_PL_FLAG_WC) | |
105 | addr = ioremap_wc(bus_base + bus_offset, bus_size); | |
106 | else | |
107 | addr = ioremap_nocache(bus_base + bus_offset, bus_size); | |
108 | if (!addr) | |
109 | return -ENOMEM; | |
110 | } | |
111 | *virtual = addr; | |
112 | return 0; | |
113 | } | |
114 | ||
115 | void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, | |
116 | void *virtual) | |
117 | { | |
118 | struct ttm_mem_type_manager *man; | |
119 | ||
120 | man = &bdev->man[mem->mem_type]; | |
121 | ||
122 | if (virtual && (man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) | |
123 | iounmap(virtual); | |
124 | } | |
125 | ||
126 | static int ttm_copy_io_page(void *dst, void *src, unsigned long page) | |
127 | { | |
128 | uint32_t *dstP = | |
129 | (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); | |
130 | uint32_t *srcP = | |
131 | (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); | |
132 | ||
133 | int i; | |
134 | for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) | |
135 | iowrite32(ioread32(srcP++), dstP++); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, | |
140 | unsigned long page) | |
141 | { | |
142 | struct page *d = ttm_tt_get_page(ttm, page); | |
143 | void *dst; | |
144 | ||
145 | if (!d) | |
146 | return -ENOMEM; | |
147 | ||
148 | src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); | |
149 | dst = kmap(d); | |
150 | if (!dst) | |
151 | return -ENOMEM; | |
152 | ||
153 | memcpy_fromio(dst, src, PAGE_SIZE); | |
154 | kunmap(d); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, | |
159 | unsigned long page) | |
160 | { | |
161 | struct page *s = ttm_tt_get_page(ttm, page); | |
162 | void *src; | |
163 | ||
164 | if (!s) | |
165 | return -ENOMEM; | |
166 | ||
167 | dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); | |
168 | src = kmap(s); | |
169 | if (!src) | |
170 | return -ENOMEM; | |
171 | ||
172 | memcpy_toio(dst, src, PAGE_SIZE); | |
173 | kunmap(s); | |
174 | return 0; | |
175 | } | |
176 | ||
177 | int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, | |
178 | bool evict, bool no_wait, struct ttm_mem_reg *new_mem) | |
179 | { | |
180 | struct ttm_bo_device *bdev = bo->bdev; | |
181 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
182 | struct ttm_tt *ttm = bo->ttm; | |
183 | struct ttm_mem_reg *old_mem = &bo->mem; | |
184 | struct ttm_mem_reg old_copy = *old_mem; | |
185 | void *old_iomap; | |
186 | void *new_iomap; | |
187 | int ret; | |
188 | uint32_t save_flags = old_mem->placement; | |
189 | unsigned long i; | |
190 | unsigned long page; | |
191 | unsigned long add = 0; | |
192 | int dir; | |
193 | ||
194 | ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); | |
195 | if (ret) | |
196 | return ret; | |
197 | ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); | |
198 | if (ret) | |
199 | goto out; | |
200 | ||
201 | if (old_iomap == NULL && new_iomap == NULL) | |
202 | goto out2; | |
203 | if (old_iomap == NULL && ttm == NULL) | |
204 | goto out2; | |
205 | ||
206 | add = 0; | |
207 | dir = 1; | |
208 | ||
209 | if ((old_mem->mem_type == new_mem->mem_type) && | |
210 | (new_mem->mm_node->start < | |
211 | old_mem->mm_node->start + old_mem->mm_node->size)) { | |
212 | dir = -1; | |
213 | add = new_mem->num_pages - 1; | |
214 | } | |
215 | ||
216 | for (i = 0; i < new_mem->num_pages; ++i) { | |
217 | page = i * dir + add; | |
218 | if (old_iomap == NULL) | |
219 | ret = ttm_copy_ttm_io_page(ttm, new_iomap, page); | |
220 | else if (new_iomap == NULL) | |
221 | ret = ttm_copy_io_ttm_page(ttm, old_iomap, page); | |
222 | else | |
223 | ret = ttm_copy_io_page(new_iomap, old_iomap, page); | |
224 | if (ret) | |
225 | goto out1; | |
226 | } | |
227 | mb(); | |
228 | out2: | |
229 | ttm_bo_free_old_node(bo); | |
230 | ||
231 | *old_mem = *new_mem; | |
232 | new_mem->mm_node = NULL; | |
233 | ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE); | |
234 | ||
235 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { | |
236 | ttm_tt_unbind(ttm); | |
237 | ttm_tt_destroy(ttm); | |
238 | bo->ttm = NULL; | |
239 | } | |
240 | ||
241 | out1: | |
242 | ttm_mem_reg_iounmap(bdev, new_mem, new_iomap); | |
243 | out: | |
244 | ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); | |
245 | return ret; | |
246 | } | |
247 | EXPORT_SYMBOL(ttm_bo_move_memcpy); | |
248 | ||
249 | static void ttm_transfered_destroy(struct ttm_buffer_object *bo) | |
250 | { | |
251 | kfree(bo); | |
252 | } | |
253 | ||
254 | /** | |
255 | * ttm_buffer_object_transfer | |
256 | * | |
257 | * @bo: A pointer to a struct ttm_buffer_object. | |
258 | * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, | |
259 | * holding the data of @bo with the old placement. | |
260 | * | |
261 | * This is a utility function that may be called after an accelerated move | |
262 | * has been scheduled. A new buffer object is created as a placeholder for | |
263 | * the old data while it's being copied. When that buffer object is idle, | |
264 | * it can be destroyed, releasing the space of the old placement. | |
265 | * Returns: | |
266 | * !0: Failure. | |
267 | */ | |
268 | ||
269 | static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, | |
270 | struct ttm_buffer_object **new_obj) | |
271 | { | |
272 | struct ttm_buffer_object *fbo; | |
273 | struct ttm_bo_device *bdev = bo->bdev; | |
274 | struct ttm_bo_driver *driver = bdev->driver; | |
275 | ||
276 | fbo = kzalloc(sizeof(*fbo), GFP_KERNEL); | |
277 | if (!fbo) | |
278 | return -ENOMEM; | |
279 | ||
280 | *fbo = *bo; | |
281 | ||
282 | /** | |
283 | * Fix up members that we shouldn't copy directly: | |
284 | * TODO: Explicit member copy would probably be better here. | |
285 | */ | |
286 | ||
287 | spin_lock_init(&fbo->lock); | |
288 | init_waitqueue_head(&fbo->event_queue); | |
289 | INIT_LIST_HEAD(&fbo->ddestroy); | |
290 | INIT_LIST_HEAD(&fbo->lru); | |
291 | INIT_LIST_HEAD(&fbo->swap); | |
292 | fbo->vm_node = NULL; | |
293 | ||
294 | fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); | |
295 | if (fbo->mem.mm_node) | |
296 | fbo->mem.mm_node->private = (void *)fbo; | |
297 | kref_init(&fbo->list_kref); | |
298 | kref_init(&fbo->kref); | |
299 | fbo->destroy = &ttm_transfered_destroy; | |
300 | ||
301 | *new_obj = fbo; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) | |
306 | { | |
307 | #if defined(__i386__) || defined(__x86_64__) | |
308 | if (caching_flags & TTM_PL_FLAG_WC) | |
309 | tmp = pgprot_writecombine(tmp); | |
310 | else if (boot_cpu_data.x86 > 3) | |
311 | tmp = pgprot_noncached(tmp); | |
312 | ||
313 | #elif defined(__powerpc__) | |
314 | if (!(caching_flags & TTM_PL_FLAG_CACHED)) { | |
315 | pgprot_val(tmp) |= _PAGE_NO_CACHE; | |
316 | if (caching_flags & TTM_PL_FLAG_UNCACHED) | |
317 | pgprot_val(tmp) |= _PAGE_GUARDED; | |
318 | } | |
319 | #endif | |
320 | #if defined(__ia64__) | |
321 | if (caching_flags & TTM_PL_FLAG_WC) | |
322 | tmp = pgprot_writecombine(tmp); | |
323 | else | |
324 | tmp = pgprot_noncached(tmp); | |
325 | #endif | |
326 | #if defined(__sparc__) | |
327 | if (!(caching_flags & TTM_PL_FLAG_CACHED)) | |
328 | tmp = pgprot_noncached(tmp); | |
329 | #endif | |
330 | return tmp; | |
331 | } | |
332 | ||
333 | static int ttm_bo_ioremap(struct ttm_buffer_object *bo, | |
334 | unsigned long bus_base, | |
335 | unsigned long bus_offset, | |
336 | unsigned long bus_size, | |
337 | struct ttm_bo_kmap_obj *map) | |
338 | { | |
339 | struct ttm_bo_device *bdev = bo->bdev; | |
340 | struct ttm_mem_reg *mem = &bo->mem; | |
341 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
342 | ||
343 | if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) { | |
344 | map->bo_kmap_type = ttm_bo_map_premapped; | |
345 | map->virtual = (void *)(((u8 *) man->io_addr) + bus_offset); | |
346 | } else { | |
347 | map->bo_kmap_type = ttm_bo_map_iomap; | |
348 | if (mem->placement & TTM_PL_FLAG_WC) | |
349 | map->virtual = ioremap_wc(bus_base + bus_offset, | |
350 | bus_size); | |
351 | else | |
352 | map->virtual = ioremap_nocache(bus_base + bus_offset, | |
353 | bus_size); | |
354 | } | |
355 | return (!map->virtual) ? -ENOMEM : 0; | |
356 | } | |
357 | ||
358 | static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, | |
359 | unsigned long start_page, | |
360 | unsigned long num_pages, | |
361 | struct ttm_bo_kmap_obj *map) | |
362 | { | |
363 | struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; | |
364 | struct ttm_tt *ttm = bo->ttm; | |
365 | struct page *d; | |
366 | int i; | |
367 | ||
368 | BUG_ON(!ttm); | |
369 | if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { | |
370 | /* | |
371 | * We're mapping a single page, and the desired | |
372 | * page protection is consistent with the bo. | |
373 | */ | |
374 | ||
375 | map->bo_kmap_type = ttm_bo_map_kmap; | |
376 | map->page = ttm_tt_get_page(ttm, start_page); | |
377 | map->virtual = kmap(map->page); | |
378 | } else { | |
379 | /* | |
380 | * Populate the part we're mapping; | |
381 | */ | |
382 | for (i = start_page; i < start_page + num_pages; ++i) { | |
383 | d = ttm_tt_get_page(ttm, i); | |
384 | if (!d) | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
388 | /* | |
389 | * We need to use vmap to get the desired page protection | |
390 | * or to make the buffer object look contigous. | |
391 | */ | |
392 | prot = (mem->placement & TTM_PL_FLAG_CACHED) ? | |
393 | PAGE_KERNEL : | |
394 | ttm_io_prot(mem->placement, PAGE_KERNEL); | |
395 | map->bo_kmap_type = ttm_bo_map_vmap; | |
396 | map->virtual = vmap(ttm->pages + start_page, num_pages, | |
397 | 0, prot); | |
398 | } | |
399 | return (!map->virtual) ? -ENOMEM : 0; | |
400 | } | |
401 | ||
402 | int ttm_bo_kmap(struct ttm_buffer_object *bo, | |
403 | unsigned long start_page, unsigned long num_pages, | |
404 | struct ttm_bo_kmap_obj *map) | |
405 | { | |
406 | int ret; | |
407 | unsigned long bus_base; | |
408 | unsigned long bus_offset; | |
409 | unsigned long bus_size; | |
410 | ||
411 | BUG_ON(!list_empty(&bo->swap)); | |
412 | map->virtual = NULL; | |
413 | if (num_pages > bo->num_pages) | |
414 | return -EINVAL; | |
415 | if (start_page > bo->num_pages) | |
416 | return -EINVAL; | |
417 | #if 0 | |
418 | if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC)) | |
419 | return -EPERM; | |
420 | #endif | |
421 | ret = ttm_bo_pci_offset(bo->bdev, &bo->mem, &bus_base, | |
422 | &bus_offset, &bus_size); | |
423 | if (ret) | |
424 | return ret; | |
425 | if (bus_size == 0) { | |
426 | return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); | |
427 | } else { | |
428 | bus_offset += start_page << PAGE_SHIFT; | |
429 | bus_size = num_pages << PAGE_SHIFT; | |
430 | return ttm_bo_ioremap(bo, bus_base, bus_offset, bus_size, map); | |
431 | } | |
432 | } | |
433 | EXPORT_SYMBOL(ttm_bo_kmap); | |
434 | ||
435 | void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) | |
436 | { | |
437 | if (!map->virtual) | |
438 | return; | |
439 | switch (map->bo_kmap_type) { | |
440 | case ttm_bo_map_iomap: | |
441 | iounmap(map->virtual); | |
442 | break; | |
443 | case ttm_bo_map_vmap: | |
444 | vunmap(map->virtual); | |
445 | break; | |
446 | case ttm_bo_map_kmap: | |
447 | kunmap(map->page); | |
448 | break; | |
449 | case ttm_bo_map_premapped: | |
450 | break; | |
451 | default: | |
452 | BUG(); | |
453 | } | |
454 | map->virtual = NULL; | |
455 | map->page = NULL; | |
456 | } | |
457 | EXPORT_SYMBOL(ttm_bo_kunmap); | |
458 | ||
459 | int ttm_bo_pfn_prot(struct ttm_buffer_object *bo, | |
460 | unsigned long dst_offset, | |
461 | unsigned long *pfn, pgprot_t *prot) | |
462 | { | |
463 | struct ttm_mem_reg *mem = &bo->mem; | |
464 | struct ttm_bo_device *bdev = bo->bdev; | |
465 | unsigned long bus_offset; | |
466 | unsigned long bus_size; | |
467 | unsigned long bus_base; | |
468 | int ret; | |
469 | ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset, | |
470 | &bus_size); | |
471 | if (ret) | |
472 | return -EINVAL; | |
473 | if (bus_size != 0) | |
474 | *pfn = (bus_base + bus_offset + dst_offset) >> PAGE_SHIFT; | |
475 | else | |
476 | if (!bo->ttm) | |
477 | return -EINVAL; | |
478 | else | |
479 | *pfn = page_to_pfn(ttm_tt_get_page(bo->ttm, | |
480 | dst_offset >> | |
481 | PAGE_SHIFT)); | |
482 | *prot = (mem->placement & TTM_PL_FLAG_CACHED) ? | |
483 | PAGE_KERNEL : ttm_io_prot(mem->placement, PAGE_KERNEL); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, | |
489 | void *sync_obj, | |
490 | void *sync_obj_arg, | |
491 | bool evict, bool no_wait, | |
492 | struct ttm_mem_reg *new_mem) | |
493 | { | |
494 | struct ttm_bo_device *bdev = bo->bdev; | |
495 | struct ttm_bo_driver *driver = bdev->driver; | |
496 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
497 | struct ttm_mem_reg *old_mem = &bo->mem; | |
498 | int ret; | |
499 | uint32_t save_flags = old_mem->placement; | |
500 | struct ttm_buffer_object *ghost_obj; | |
501 | void *tmp_obj = NULL; | |
502 | ||
503 | spin_lock(&bo->lock); | |
504 | if (bo->sync_obj) { | |
505 | tmp_obj = bo->sync_obj; | |
506 | bo->sync_obj = NULL; | |
507 | } | |
508 | bo->sync_obj = driver->sync_obj_ref(sync_obj); | |
509 | bo->sync_obj_arg = sync_obj_arg; | |
510 | if (evict) { | |
511 | ret = ttm_bo_wait(bo, false, false, false); | |
512 | spin_unlock(&bo->lock); | |
513 | driver->sync_obj_unref(&bo->sync_obj); | |
514 | ||
515 | if (ret) | |
516 | return ret; | |
517 | ||
518 | ttm_bo_free_old_node(bo); | |
519 | if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && | |
520 | (bo->ttm != NULL)) { | |
521 | ttm_tt_unbind(bo->ttm); | |
522 | ttm_tt_destroy(bo->ttm); | |
523 | bo->ttm = NULL; | |
524 | } | |
525 | } else { | |
526 | /** | |
527 | * This should help pipeline ordinary buffer moves. | |
528 | * | |
529 | * Hang old buffer memory on a new buffer object, | |
530 | * and leave it to be released when the GPU | |
531 | * operation has completed. | |
532 | */ | |
533 | ||
534 | set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); | |
535 | spin_unlock(&bo->lock); | |
536 | ||
537 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); | |
538 | if (ret) | |
539 | return ret; | |
540 | ||
541 | /** | |
542 | * If we're not moving to fixed memory, the TTM object | |
543 | * needs to stay alive. Otherwhise hang it on the ghost | |
544 | * bo to be unbound and destroyed. | |
545 | */ | |
546 | ||
547 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
548 | ghost_obj->ttm = NULL; | |
549 | else | |
550 | bo->ttm = NULL; | |
551 | ||
552 | ttm_bo_unreserve(ghost_obj); | |
553 | ttm_bo_unref(&ghost_obj); | |
554 | } | |
555 | ||
556 | *old_mem = *new_mem; | |
557 | new_mem->mm_node = NULL; | |
558 | ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE); | |
559 | return 0; | |
560 | } | |
561 | EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); |