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 static 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 static 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 /* 347 * Single TTM move. NOP. 348 */ 349 if (old_iomap == NULL && new_iomap == NULL) 350 goto out2; 351 352 /* 353 * Don't move nonexistent data. Clear destination instead. 354 */ 355 if (old_iomap == NULL && 356 (ttm == NULL || (ttm->state == tt_unpopulated && 357 !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) { 358 memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE); 359 goto out2; 360 } 361 362 /* 363 * TTM might be null for moves within the same region. 364 */ 365 if (ttm && ttm->state == tt_unpopulated) { 366 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 367 if (ret) 368 goto out1; 369 } 370 371 add = 0; 372 dir = 1; 373 374 if ((old_mem->mem_type == new_mem->mem_type) && 375 (new_mem->start < old_mem->start + old_mem->size)) { 376 dir = -1; 377 add = new_mem->num_pages - 1; 378 } 379 380 for (i = 0; i < new_mem->num_pages; ++i) { 381 page = i * dir + add; 382 if (old_iomap == NULL) { 383 pgprot_t prot = ttm_io_prot(old_mem->placement, 384 PAGE_KERNEL); 385 ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, 386 prot); 387 } else if (new_iomap == NULL) { 388 pgprot_t prot = ttm_io_prot(new_mem->placement, 389 PAGE_KERNEL); 390 ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, 391 prot); 392 } else 393 ret = ttm_copy_io_page(new_iomap, old_iomap, page); 394 if (ret) 395 goto out1; 396 } 397 mb(); 398 out2: 399 old_copy = *old_mem; 400 *old_mem = *new_mem; 401 new_mem->mm_node = NULL; 402 403 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { 404 ttm_tt_unbind(ttm); 405 ttm_tt_destroy(ttm); 406 bo->ttm = NULL; 407 } 408 409 out1: 410 ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); 411 out: 412 ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); 413 414 /* 415 * On error, keep the mm node! 416 */ 417 if (!ret) 418 ttm_bo_mem_put(bo, &old_copy); 419 return ret; 420 } 421 EXPORT_SYMBOL(ttm_bo_move_memcpy); 422 423 static void ttm_transfered_destroy(struct ttm_buffer_object *bo) 424 { 425 kfree(bo); 426 } 427 428 /** 429 * ttm_buffer_object_transfer 430 * 431 * @bo: A pointer to a struct ttm_buffer_object. 432 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, 433 * holding the data of @bo with the old placement. 434 * 435 * This is a utility function that may be called after an accelerated move 436 * has been scheduled. A new buffer object is created as a placeholder for 437 * the old data while it's being copied. When that buffer object is idle, 438 * it can be destroyed, releasing the space of the old placement. 439 * Returns: 440 * !0: Failure. 441 */ 442 443 static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, 444 struct ttm_buffer_object **new_obj) 445 { 446 struct ttm_buffer_object *fbo; 447 struct ttm_bo_device *bdev = bo->bdev; 448 struct ttm_bo_driver *driver = bdev->driver; 449 int ret; 450 451 fbo = kmalloc(sizeof(*fbo), M_DRM, M_WAITOK); 452 if (!fbo) 453 return -ENOMEM; 454 455 *fbo = *bo; 456 457 /** 458 * Fix up members that we shouldn't copy directly: 459 * TODO: Explicit member copy would probably be better here. 460 */ 461 462 INIT_LIST_HEAD(&fbo->ddestroy); 463 INIT_LIST_HEAD(&fbo->lru); 464 INIT_LIST_HEAD(&fbo->swap); 465 INIT_LIST_HEAD(&fbo->io_reserve_lru); 466 drm_vma_node_reset(&fbo->vma_node); 467 atomic_set(&fbo->cpu_writers, 0); 468 469 lockmgr(&bdev->fence_lock, LK_EXCLUSIVE); 470 if (bo->sync_obj) 471 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); 472 else 473 fbo->sync_obj = NULL; 474 lockmgr(&bdev->fence_lock, LK_RELEASE); 475 kref_init(&fbo->list_kref); 476 kref_init(&fbo->kref); 477 fbo->destroy = &ttm_transfered_destroy; 478 fbo->acc_size = 0; 479 fbo->resv = &fbo->ttm_resv; 480 reservation_object_init(fbo->resv); 481 ret = ww_mutex_trylock(&fbo->resv->lock); 482 WARN_ON(!ret); 483 484 /* 485 * Mirror ref from kref_init() for list_kref. 486 */ 487 set_bit(TTM_BO_PRIV_FLAG_ACTIVE, &fbo->priv_flags); 488 489 *new_obj = fbo; 490 return 0; 491 } 492 493 pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) 494 { 495 #if defined(__i386__) || defined(__x86_64__) 496 if (caching_flags & TTM_PL_FLAG_WC) 497 tmp = pgprot_writecombine(tmp); 498 else 499 tmp = pgprot_noncached(tmp); 500 501 #elif defined(__powerpc__) 502 if (!(caching_flags & TTM_PL_FLAG_CACHED)) { 503 pgprot_val(tmp) |= _PAGE_NO_CACHE; 504 if (caching_flags & TTM_PL_FLAG_UNCACHED) 505 pgprot_val(tmp) |= _PAGE_GUARDED; 506 } 507 #endif 508 #if defined(__ia64__) 509 if (caching_flags & TTM_PL_FLAG_WC) 510 tmp = pgprot_writecombine(tmp); 511 else 512 tmp = pgprot_noncached(tmp); 513 #endif 514 #if defined(__sparc__) || defined(__mips__) 515 if (!(caching_flags & TTM_PL_FLAG_CACHED)) 516 tmp = pgprot_noncached(tmp); 517 #endif 518 return tmp; 519 } 520 EXPORT_SYMBOL(ttm_io_prot); 521 522 static int ttm_bo_ioremap(struct ttm_buffer_object *bo, 523 unsigned long offset, 524 unsigned long size, 525 struct ttm_bo_kmap_obj *map) 526 { 527 struct ttm_mem_reg *mem = &bo->mem; 528 529 if (bo->mem.bus.addr) { 530 map->bo_kmap_type = ttm_bo_map_premapped; 531 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); 532 } else { 533 map->bo_kmap_type = ttm_bo_map_iomap; 534 if (mem->placement & TTM_PL_FLAG_WC) 535 map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, 536 size); 537 else 538 map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, 539 size); 540 } 541 return (!map->virtual) ? -ENOMEM : 0; 542 } 543 544 static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, 545 unsigned long start_page, 546 unsigned long num_pages, 547 struct ttm_bo_kmap_obj *map) 548 { 549 struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; 550 struct ttm_tt *ttm = bo->ttm; 551 int ret; 552 553 BUG_ON(!ttm); 554 555 if (ttm->state == tt_unpopulated) { 556 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 557 if (ret) 558 return ret; 559 } 560 561 if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { 562 /* 563 * We're mapping a single page, and the desired 564 * page protection is consistent with the bo. 565 */ 566 567 map->bo_kmap_type = ttm_bo_map_kmap; 568 map->page = ttm->pages[start_page]; 569 map->virtual = kmap(map->page); 570 } else { 571 /* 572 * We need to use vmap to get the desired page protection 573 * or to make the buffer object look contiguous. 574 */ 575 prot = (mem->placement & TTM_PL_FLAG_CACHED) ? 576 PAGE_KERNEL : 577 ttm_io_prot(mem->placement, PAGE_KERNEL); 578 map->bo_kmap_type = ttm_bo_map_vmap; 579 map->virtual = vmap(ttm->pages + start_page, num_pages, 580 0, prot); 581 } 582 return (!map->virtual) ? -ENOMEM : 0; 583 } 584 585 int ttm_bo_kmap(struct ttm_buffer_object *bo, 586 unsigned long start_page, unsigned long num_pages, 587 struct ttm_bo_kmap_obj *map) 588 { 589 struct ttm_mem_type_manager *man = 590 &bo->bdev->man[bo->mem.mem_type]; 591 unsigned long offset, size; 592 int ret; 593 594 BUG_ON(!list_empty(&bo->swap)); 595 map->virtual = NULL; 596 map->bo = bo; 597 if (num_pages > bo->num_pages) 598 return -EINVAL; 599 if (start_page > bo->num_pages) 600 return -EINVAL; 601 #if 0 602 if (num_pages > 1 && !capable(CAP_SYS_ADMIN)) 603 return -EPERM; 604 #endif 605 (void) ttm_mem_io_lock(man, false); 606 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); 607 ttm_mem_io_unlock(man); 608 if (ret) 609 return ret; 610 if (!bo->mem.bus.is_iomem) { 611 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); 612 } else { 613 offset = start_page << PAGE_SHIFT; 614 size = num_pages << PAGE_SHIFT; 615 return ttm_bo_ioremap(bo, offset, size, map); 616 } 617 } 618 EXPORT_SYMBOL(ttm_bo_kmap); 619 620 void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) 621 { 622 struct ttm_buffer_object *bo = map->bo; 623 struct ttm_mem_type_manager *man = 624 &bo->bdev->man[bo->mem.mem_type]; 625 626 if (!map->virtual) 627 return; 628 switch (map->bo_kmap_type) { 629 case ttm_bo_map_iomap: 630 iounmap(map->virtual); 631 break; 632 case ttm_bo_map_vmap: 633 vunmap(map->virtual); 634 break; 635 case ttm_bo_map_kmap: 636 kunmap(map->page); 637 break; 638 case ttm_bo_map_premapped: 639 break; 640 default: 641 BUG(); 642 } 643 (void) ttm_mem_io_lock(man, false); 644 ttm_mem_io_free(map->bo->bdev, &map->bo->mem); 645 ttm_mem_io_unlock(man); 646 map->virtual = NULL; 647 map->page = NULL; 648 } 649 EXPORT_SYMBOL(ttm_bo_kunmap); 650 651 int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, 652 void *sync_obj, 653 bool evict, 654 bool no_wait_gpu, 655 struct ttm_mem_reg *new_mem) 656 { 657 struct ttm_bo_device *bdev = bo->bdev; 658 struct ttm_bo_driver *driver = bdev->driver; 659 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 660 struct ttm_mem_reg *old_mem = &bo->mem; 661 int ret; 662 struct ttm_buffer_object *ghost_obj; 663 void *tmp_obj = NULL; 664 665 lockmgr(&bdev->fence_lock, LK_EXCLUSIVE); 666 if (bo->sync_obj) { 667 tmp_obj = bo->sync_obj; 668 bo->sync_obj = NULL; 669 } 670 bo->sync_obj = driver->sync_obj_ref(sync_obj); 671 if (evict) { 672 ret = ttm_bo_wait(bo, false, false, false); 673 lockmgr(&bdev->fence_lock, LK_RELEASE); 674 if (tmp_obj) 675 driver->sync_obj_unref(&tmp_obj); 676 if (ret) 677 return ret; 678 679 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && 680 (bo->ttm != NULL)) { 681 ttm_tt_unbind(bo->ttm); 682 ttm_tt_destroy(bo->ttm); 683 bo->ttm = NULL; 684 } 685 ttm_bo_free_old_node(bo); 686 } else { 687 /** 688 * This should help pipeline ordinary buffer moves. 689 * 690 * Hang old buffer memory on a new buffer object, 691 * and leave it to be released when the GPU 692 * operation has completed. 693 */ 694 695 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); 696 lockmgr(&bdev->fence_lock, LK_RELEASE); 697 if (tmp_obj) 698 driver->sync_obj_unref(&tmp_obj); 699 700 ret = ttm_buffer_object_transfer(bo, &ghost_obj); 701 if (ret) 702 return ret; 703 704 /** 705 * If we're not moving to fixed memory, the TTM object 706 * needs to stay alive. Otherwhise hang it on the ghost 707 * bo to be unbound and destroyed. 708 */ 709 710 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) 711 ghost_obj->ttm = NULL; 712 else 713 bo->ttm = NULL; 714 715 ttm_bo_unreserve(ghost_obj); 716 ttm_bo_unref(&ghost_obj); 717 } 718 719 *old_mem = *new_mem; 720 new_mem->mm_node = NULL; 721 722 return 0; 723 } 724 EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); 725