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 <drm/ttm/ttm_bo_driver.h> 32 #include <drm/ttm/ttm_placement.h> 33 #include <drm/drm_vma_manager.h> 34 #include <linux/io.h> 35 #include <linux/highmem.h> 36 #include <linux/wait.h> 37 #include <linux/slab.h> 38 #include <linux/vmalloc.h> 39 #include <linux/module.h> 40 41 void ttm_bo_free_old_node(struct ttm_buffer_object *bo) 42 { 43 ttm_bo_mem_put(bo, &bo->mem); 44 } 45 46 int ttm_bo_move_ttm(struct ttm_buffer_object *bo, 47 bool evict, 48 bool no_wait_gpu, struct ttm_mem_reg *new_mem) 49 { 50 struct ttm_tt *ttm = bo->ttm; 51 struct ttm_mem_reg *old_mem = &bo->mem; 52 int ret; 53 54 if (old_mem->mem_type != TTM_PL_SYSTEM) { 55 ttm_tt_unbind(ttm); 56 ttm_bo_free_old_node(bo); 57 ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, 58 TTM_PL_MASK_MEM); 59 old_mem->mem_type = TTM_PL_SYSTEM; 60 } 61 62 ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); 63 if (unlikely(ret != 0)) 64 return ret; 65 66 if (new_mem->mem_type != TTM_PL_SYSTEM) { 67 ret = ttm_tt_bind(ttm, new_mem); 68 if (unlikely(ret != 0)) 69 return ret; 70 } 71 72 *old_mem = *new_mem; 73 new_mem->mm_node = NULL; 74 75 return 0; 76 } 77 EXPORT_SYMBOL(ttm_bo_move_ttm); 78 79 int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) 80 { 81 if (likely(man->io_reserve_fastpath)) 82 return 0; 83 84 if (interruptible) 85 return mutex_lock_interruptible(&man->io_reserve_mutex); 86 87 mutex_lock(&man->io_reserve_mutex); 88 return 0; 89 } 90 EXPORT_SYMBOL(ttm_mem_io_lock); 91 92 void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) 93 { 94 if (likely(man->io_reserve_fastpath)) 95 return; 96 97 mutex_unlock(&man->io_reserve_mutex); 98 } 99 EXPORT_SYMBOL(ttm_mem_io_unlock); 100 101 static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) 102 { 103 struct ttm_buffer_object *bo; 104 105 if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) 106 return -EAGAIN; 107 108 bo = list_first_entry(&man->io_reserve_lru, 109 struct ttm_buffer_object, 110 io_reserve_lru); 111 list_del_init(&bo->io_reserve_lru); 112 ttm_bo_unmap_virtual_locked(bo); 113 114 return 0; 115 } 116 117 118 int ttm_mem_io_reserve(struct ttm_bo_device *bdev, 119 struct ttm_mem_reg *mem) 120 { 121 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 122 int ret = 0; 123 124 if (!bdev->driver->io_mem_reserve) 125 return 0; 126 if (likely(man->io_reserve_fastpath)) 127 return bdev->driver->io_mem_reserve(bdev, mem); 128 129 if (bdev->driver->io_mem_reserve && 130 mem->bus.io_reserved_count++ == 0) { 131 retry: 132 ret = bdev->driver->io_mem_reserve(bdev, mem); 133 if (ret == -EAGAIN) { 134 ret = ttm_mem_io_evict(man); 135 if (ret == 0) 136 goto retry; 137 } 138 } 139 return ret; 140 } 141 EXPORT_SYMBOL(ttm_mem_io_reserve); 142 143 void ttm_mem_io_free(struct ttm_bo_device *bdev, 144 struct ttm_mem_reg *mem) 145 { 146 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 147 148 if (likely(man->io_reserve_fastpath)) 149 return; 150 151 if (bdev->driver->io_mem_reserve && 152 --mem->bus.io_reserved_count == 0 && 153 bdev->driver->io_mem_free) 154 bdev->driver->io_mem_free(bdev, mem); 155 156 } 157 EXPORT_SYMBOL(ttm_mem_io_free); 158 159 int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo) 160 { 161 struct ttm_mem_reg *mem = &bo->mem; 162 int ret; 163 164 if (!mem->bus.io_reserved_vm) { 165 struct ttm_mem_type_manager *man = 166 &bo->bdev->man[mem->mem_type]; 167 168 ret = ttm_mem_io_reserve(bo->bdev, mem); 169 if (unlikely(ret != 0)) 170 return ret; 171 mem->bus.io_reserved_vm = true; 172 if (man->use_io_reserve_lru) 173 list_add_tail(&bo->io_reserve_lru, 174 &man->io_reserve_lru); 175 } 176 return 0; 177 } 178 179 void ttm_mem_io_free_vm(struct ttm_buffer_object *bo) 180 { 181 struct ttm_mem_reg *mem = &bo->mem; 182 183 if (mem->bus.io_reserved_vm) { 184 mem->bus.io_reserved_vm = false; 185 list_del_init(&bo->io_reserve_lru); 186 ttm_mem_io_free(bo->bdev, mem); 187 } 188 } 189 190 int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, 191 void **virtual) 192 { 193 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 194 int ret; 195 void *addr; 196 197 *virtual = NULL; 198 (void) ttm_mem_io_lock(man, false); 199 ret = ttm_mem_io_reserve(bdev, mem); 200 ttm_mem_io_unlock(man); 201 if (ret || !mem->bus.is_iomem) 202 return ret; 203 204 if (mem->bus.addr) { 205 addr = mem->bus.addr; 206 } else { 207 if (mem->placement & TTM_PL_FLAG_WC) 208 addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size); 209 else 210 addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); 211 if (!addr) { 212 (void) ttm_mem_io_lock(man, false); 213 ttm_mem_io_free(bdev, mem); 214 ttm_mem_io_unlock(man); 215 return -ENOMEM; 216 } 217 } 218 *virtual = addr; 219 return 0; 220 } 221 222 void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, 223 void *virtual) 224 { 225 struct ttm_mem_type_manager *man; 226 227 man = &bdev->man[mem->mem_type]; 228 229 if (virtual && mem->bus.addr == NULL) 230 iounmap(virtual); 231 (void) ttm_mem_io_lock(man, false); 232 ttm_mem_io_free(bdev, mem); 233 ttm_mem_io_unlock(man); 234 } 235 236 static int ttm_copy_io_page(void *dst, void *src, unsigned long page) 237 { 238 uint32_t *dstP = 239 (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); 240 uint32_t *srcP = 241 (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); 242 243 int i; 244 for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) 245 iowrite32(ioread32(srcP++), dstP++); 246 return 0; 247 } 248 249 static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, 250 unsigned long page, 251 pgprot_t prot) 252 { 253 struct page *d = ttm->pages[page]; 254 void *dst; 255 256 if (!d) 257 return -ENOMEM; 258 259 src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); 260 261 #ifdef CONFIG_X86 262 dst = kmap_atomic_prot(d, prot); 263 #else 264 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 265 dst = vmap(&d, 1, 0, prot); 266 else 267 dst = kmap(d); 268 #endif 269 if (!dst) 270 return -ENOMEM; 271 272 memcpy_fromio(dst, src, PAGE_SIZE); 273 274 #ifdef CONFIG_X86 275 kunmap_atomic(dst); 276 #else 277 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 278 vunmap(dst); 279 else 280 kunmap(d); 281 #endif 282 283 return 0; 284 } 285 286 static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, 287 unsigned long page, 288 pgprot_t prot) 289 { 290 struct page *s = ttm->pages[page]; 291 void *src; 292 293 if (!s) 294 return -ENOMEM; 295 296 dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); 297 #ifdef CONFIG_X86 298 src = kmap_atomic_prot(s, prot); 299 #else 300 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 301 src = vmap(&s, 1, 0, prot); 302 else 303 src = kmap(s); 304 #endif 305 if (!src) 306 return -ENOMEM; 307 308 memcpy_toio(dst, src, PAGE_SIZE); 309 310 #ifdef CONFIG_X86 311 kunmap_atomic(src); 312 #else 313 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 314 vunmap(src); 315 else 316 kunmap(s); 317 #endif 318 319 return 0; 320 } 321 322 int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, 323 bool evict, bool no_wait_gpu, 324 struct ttm_mem_reg *new_mem) 325 { 326 struct ttm_bo_device *bdev = bo->bdev; 327 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 328 struct ttm_tt *ttm = bo->ttm; 329 struct ttm_mem_reg *old_mem = &bo->mem; 330 struct ttm_mem_reg old_copy = *old_mem; 331 void *old_iomap; 332 void *new_iomap; 333 int ret; 334 unsigned long i; 335 unsigned long page; 336 unsigned long add = 0; 337 int dir; 338 339 ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); 340 if (ret) 341 return ret; 342 ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); 343 if (ret) 344 goto out; 345 346 if (old_iomap == NULL && new_iomap == NULL) 347 goto out2; 348 if (old_iomap == NULL && ttm == NULL) 349 goto out2; 350 351 if (ttm->state == tt_unpopulated) { 352 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 353 if (ret) { 354 /* if we fail here don't nuke the mm node 355 * as the bo still owns it */ 356 old_copy.mm_node = NULL; 357 goto out1; 358 } 359 } 360 361 add = 0; 362 dir = 1; 363 364 if ((old_mem->mem_type == new_mem->mem_type) && 365 (new_mem->start < old_mem->start + old_mem->size)) { 366 dir = -1; 367 add = new_mem->num_pages - 1; 368 } 369 370 for (i = 0; i < new_mem->num_pages; ++i) { 371 page = i * dir + add; 372 if (old_iomap == NULL) { 373 pgprot_t prot = ttm_io_prot(old_mem->placement, 374 PAGE_KERNEL); 375 ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, 376 prot); 377 } else if (new_iomap == NULL) { 378 pgprot_t prot = ttm_io_prot(new_mem->placement, 379 PAGE_KERNEL); 380 ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, 381 prot); 382 } else 383 ret = ttm_copy_io_page(new_iomap, old_iomap, page); 384 if (ret) { 385 /* failing here, means keep old copy as-is */ 386 old_copy.mm_node = NULL; 387 goto out1; 388 } 389 } 390 mb(); 391 out2: 392 old_copy = *old_mem; 393 *old_mem = *new_mem; 394 new_mem->mm_node = NULL; 395 396 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { 397 ttm_tt_unbind(ttm); 398 ttm_tt_destroy(ttm); 399 bo->ttm = NULL; 400 } 401 402 out1: 403 ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); 404 out: 405 ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); 406 ttm_bo_mem_put(bo, &old_copy); 407 return ret; 408 } 409 EXPORT_SYMBOL(ttm_bo_move_memcpy); 410 411 static void ttm_transfered_destroy(struct ttm_buffer_object *bo) 412 { 413 kfree(bo); 414 } 415 416 /** 417 * ttm_buffer_object_transfer 418 * 419 * @bo: A pointer to a struct ttm_buffer_object. 420 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, 421 * holding the data of @bo with the old placement. 422 * 423 * This is a utility function that may be called after an accelerated move 424 * has been scheduled. A new buffer object is created as a placeholder for 425 * the old data while it's being copied. When that buffer object is idle, 426 * it can be destroyed, releasing the space of the old placement. 427 * Returns: 428 * !0: Failure. 429 */ 430 431 static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, 432 struct ttm_buffer_object **new_obj) 433 { 434 struct ttm_buffer_object *fbo; 435 struct ttm_bo_device *bdev = bo->bdev; 436 struct ttm_bo_driver *driver = bdev->driver; 437 int ret; 438 439 fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); 440 if (!fbo) 441 return -ENOMEM; 442 443 *fbo = *bo; 444 445 /** 446 * Fix up members that we shouldn't copy directly: 447 * TODO: Explicit member copy would probably be better here. 448 */ 449 450 INIT_LIST_HEAD(&fbo->ddestroy); 451 INIT_LIST_HEAD(&fbo->lru); 452 INIT_LIST_HEAD(&fbo->swap); 453 INIT_LIST_HEAD(&fbo->io_reserve_lru); 454 drm_vma_node_reset(&fbo->vma_node); 455 atomic_set(&fbo->cpu_writers, 0); 456 457 spin_lock(&bdev->fence_lock); 458 if (bo->sync_obj) 459 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); 460 else 461 fbo->sync_obj = NULL; 462 spin_unlock(&bdev->fence_lock); 463 kref_init(&fbo->list_kref); 464 kref_init(&fbo->kref); 465 fbo->destroy = &ttm_transfered_destroy; 466 fbo->acc_size = 0; 467 fbo->resv = &fbo->ttm_resv; 468 reservation_object_init(fbo->resv); 469 ret = ww_mutex_trylock(&fbo->resv->lock); 470 WARN_ON(!ret); 471 472 *new_obj = fbo; 473 return 0; 474 } 475 476 pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) 477 { 478 #if defined(__i386__) || defined(__x86_64__) 479 if (caching_flags & TTM_PL_FLAG_WC) 480 tmp = pgprot_writecombine(tmp); 481 else if (boot_cpu_data.x86 > 3) 482 tmp = pgprot_noncached(tmp); 483 484 #elif defined(__powerpc__) 485 if (!(caching_flags & TTM_PL_FLAG_CACHED)) { 486 pgprot_val(tmp) |= _PAGE_NO_CACHE; 487 if (caching_flags & TTM_PL_FLAG_UNCACHED) 488 pgprot_val(tmp) |= _PAGE_GUARDED; 489 } 490 #endif 491 #if defined(__ia64__) 492 if (caching_flags & TTM_PL_FLAG_WC) 493 tmp = pgprot_writecombine(tmp); 494 else 495 tmp = pgprot_noncached(tmp); 496 #endif 497 #if defined(__sparc__) || defined(__mips__) 498 if (!(caching_flags & TTM_PL_FLAG_CACHED)) 499 tmp = pgprot_noncached(tmp); 500 #endif 501 return tmp; 502 } 503 EXPORT_SYMBOL(ttm_io_prot); 504 505 static int ttm_bo_ioremap(struct ttm_buffer_object *bo, 506 unsigned long offset, 507 unsigned long size, 508 struct ttm_bo_kmap_obj *map) 509 { 510 struct ttm_mem_reg *mem = &bo->mem; 511 512 if (bo->mem.bus.addr) { 513 map->bo_kmap_type = ttm_bo_map_premapped; 514 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); 515 } else { 516 map->bo_kmap_type = ttm_bo_map_iomap; 517 if (mem->placement & TTM_PL_FLAG_WC) 518 map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, 519 size); 520 else 521 map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, 522 size); 523 } 524 return (!map->virtual) ? -ENOMEM : 0; 525 } 526 527 static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, 528 unsigned long start_page, 529 unsigned long num_pages, 530 struct ttm_bo_kmap_obj *map) 531 { 532 struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; 533 struct ttm_tt *ttm = bo->ttm; 534 int ret; 535 536 BUG_ON(!ttm); 537 538 if (ttm->state == tt_unpopulated) { 539 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 540 if (ret) 541 return ret; 542 } 543 544 if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { 545 /* 546 * We're mapping a single page, and the desired 547 * page protection is consistent with the bo. 548 */ 549 550 map->bo_kmap_type = ttm_bo_map_kmap; 551 map->page = ttm->pages[start_page]; 552 map->virtual = kmap(map->page); 553 } else { 554 /* 555 * We need to use vmap to get the desired page protection 556 * or to make the buffer object look contiguous. 557 */ 558 prot = (mem->placement & TTM_PL_FLAG_CACHED) ? 559 PAGE_KERNEL : 560 ttm_io_prot(mem->placement, PAGE_KERNEL); 561 map->bo_kmap_type = ttm_bo_map_vmap; 562 map->virtual = vmap(ttm->pages + start_page, num_pages, 563 0, prot); 564 } 565 return (!map->virtual) ? -ENOMEM : 0; 566 } 567 568 int ttm_bo_kmap(struct ttm_buffer_object *bo, 569 unsigned long start_page, unsigned long num_pages, 570 struct ttm_bo_kmap_obj *map) 571 { 572 struct ttm_mem_type_manager *man = 573 &bo->bdev->man[bo->mem.mem_type]; 574 unsigned long offset, size; 575 int ret; 576 577 BUG_ON(!list_empty(&bo->swap)); 578 map->virtual = NULL; 579 map->bo = bo; 580 if (num_pages > bo->num_pages) 581 return -EINVAL; 582 if (start_page > bo->num_pages) 583 return -EINVAL; 584 #if 0 585 if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC)) 586 return -EPERM; 587 #endif 588 (void) ttm_mem_io_lock(man, false); 589 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); 590 ttm_mem_io_unlock(man); 591 if (ret) 592 return ret; 593 if (!bo->mem.bus.is_iomem) { 594 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); 595 } else { 596 offset = start_page << PAGE_SHIFT; 597 size = num_pages << PAGE_SHIFT; 598 return ttm_bo_ioremap(bo, offset, size, map); 599 } 600 } 601 EXPORT_SYMBOL(ttm_bo_kmap); 602 603 void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) 604 { 605 struct ttm_buffer_object *bo = map->bo; 606 struct ttm_mem_type_manager *man = 607 &bo->bdev->man[bo->mem.mem_type]; 608 609 if (!map->virtual) 610 return; 611 switch (map->bo_kmap_type) { 612 case ttm_bo_map_iomap: 613 iounmap(map->virtual); 614 break; 615 case ttm_bo_map_vmap: 616 vunmap(map->virtual); 617 break; 618 case ttm_bo_map_kmap: 619 kunmap(map->page); 620 break; 621 case ttm_bo_map_premapped: 622 break; 623 default: 624 BUG(); 625 } 626 (void) ttm_mem_io_lock(man, false); 627 ttm_mem_io_free(map->bo->bdev, &map->bo->mem); 628 ttm_mem_io_unlock(man); 629 map->virtual = NULL; 630 map->page = NULL; 631 } 632 EXPORT_SYMBOL(ttm_bo_kunmap); 633 634 int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, 635 void *sync_obj, 636 bool evict, 637 bool no_wait_gpu, 638 struct ttm_mem_reg *new_mem) 639 { 640 struct ttm_bo_device *bdev = bo->bdev; 641 struct ttm_bo_driver *driver = bdev->driver; 642 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 643 struct ttm_mem_reg *old_mem = &bo->mem; 644 int ret; 645 struct ttm_buffer_object *ghost_obj; 646 void *tmp_obj = NULL; 647 648 spin_lock(&bdev->fence_lock); 649 if (bo->sync_obj) { 650 tmp_obj = bo->sync_obj; 651 bo->sync_obj = NULL; 652 } 653 bo->sync_obj = driver->sync_obj_ref(sync_obj); 654 if (evict) { 655 ret = ttm_bo_wait(bo, false, false, false); 656 spin_unlock(&bdev->fence_lock); 657 if (tmp_obj) 658 driver->sync_obj_unref(&tmp_obj); 659 if (ret) 660 return ret; 661 662 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && 663 (bo->ttm != NULL)) { 664 ttm_tt_unbind(bo->ttm); 665 ttm_tt_destroy(bo->ttm); 666 bo->ttm = NULL; 667 } 668 ttm_bo_free_old_node(bo); 669 } else { 670 /** 671 * This should help pipeline ordinary buffer moves. 672 * 673 * Hang old buffer memory on a new buffer object, 674 * and leave it to be released when the GPU 675 * operation has completed. 676 */ 677 678 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); 679 spin_unlock(&bdev->fence_lock); 680 if (tmp_obj) 681 driver->sync_obj_unref(&tmp_obj); 682 683 ret = ttm_buffer_object_transfer(bo, &ghost_obj); 684 if (ret) 685 return ret; 686 687 /** 688 * If we're not moving to fixed memory, the TTM object 689 * needs to stay alive. Otherwhise hang it on the ghost 690 * bo to be unbound and destroyed. 691 */ 692 693 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) 694 ghost_obj->ttm = NULL; 695 else 696 bo->ttm = NULL; 697 698 ttm_bo_unreserve(ghost_obj); 699 ttm_bo_unref(&ghost_obj); 700 } 701 702 *old_mem = *new_mem; 703 new_mem->mm_node = NULL; 704 705 return 0; 706 } 707 EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); 708