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