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 if (lockmgr(&man->io_reserve_mutex, 86 LK_EXCLUSIVE | LK_SLEEPFAIL)) 87 return (-EINTR); 88 else 89 return (0); 90 } 91 92 lockmgr(&man->io_reserve_mutex, LK_EXCLUSIVE); 93 return 0; 94 } 95 EXPORT_SYMBOL(ttm_mem_io_lock); 96 97 void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) 98 { 99 if (likely(man->io_reserve_fastpath)) 100 return; 101 102 lockmgr(&man->io_reserve_mutex, LK_RELEASE); 103 } 104 EXPORT_SYMBOL(ttm_mem_io_unlock); 105 106 static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) 107 { 108 struct ttm_buffer_object *bo; 109 110 if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) 111 return -EAGAIN; 112 113 bo = list_first_entry(&man->io_reserve_lru, 114 struct ttm_buffer_object, 115 io_reserve_lru); 116 list_del_init(&bo->io_reserve_lru); 117 ttm_bo_unmap_virtual_locked(bo); 118 119 return 0; 120 } 121 122 123 int ttm_mem_io_reserve(struct ttm_bo_device *bdev, 124 struct ttm_mem_reg *mem) 125 { 126 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 127 int ret = 0; 128 129 if (!bdev->driver->io_mem_reserve) 130 return 0; 131 if (likely(man->io_reserve_fastpath)) 132 return bdev->driver->io_mem_reserve(bdev, mem); 133 134 if (bdev->driver->io_mem_reserve && 135 mem->bus.io_reserved_count++ == 0) { 136 retry: 137 ret = bdev->driver->io_mem_reserve(bdev, mem); 138 if (ret == -EAGAIN) { 139 ret = ttm_mem_io_evict(man); 140 if (ret == 0) 141 goto retry; 142 } 143 } 144 return ret; 145 } 146 EXPORT_SYMBOL(ttm_mem_io_reserve); 147 148 void ttm_mem_io_free(struct ttm_bo_device *bdev, 149 struct ttm_mem_reg *mem) 150 { 151 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 152 153 if (likely(man->io_reserve_fastpath)) 154 return; 155 156 if (bdev->driver->io_mem_reserve && 157 --mem->bus.io_reserved_count == 0 && 158 bdev->driver->io_mem_free) 159 bdev->driver->io_mem_free(bdev, mem); 160 161 } 162 EXPORT_SYMBOL(ttm_mem_io_free); 163 164 int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo) 165 { 166 struct ttm_mem_reg *mem = &bo->mem; 167 int ret; 168 169 if (!mem->bus.io_reserved_vm) { 170 struct ttm_mem_type_manager *man = 171 &bo->bdev->man[mem->mem_type]; 172 173 ret = ttm_mem_io_reserve(bo->bdev, mem); 174 if (unlikely(ret != 0)) 175 return ret; 176 mem->bus.io_reserved_vm = true; 177 if (man->use_io_reserve_lru) 178 list_add_tail(&bo->io_reserve_lru, 179 &man->io_reserve_lru); 180 } 181 return 0; 182 } 183 184 void ttm_mem_io_free_vm(struct ttm_buffer_object *bo) 185 { 186 struct ttm_mem_reg *mem = &bo->mem; 187 188 if (mem->bus.io_reserved_vm) { 189 mem->bus.io_reserved_vm = false; 190 list_del_init(&bo->io_reserve_lru); 191 ttm_mem_io_free(bo->bdev, mem); 192 } 193 } 194 195 static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, 196 void **virtual) 197 { 198 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 199 int ret; 200 void *addr; 201 202 *virtual = NULL; 203 (void) ttm_mem_io_lock(man, false); 204 ret = ttm_mem_io_reserve(bdev, mem); 205 ttm_mem_io_unlock(man); 206 if (ret || !mem->bus.is_iomem) 207 return ret; 208 209 if (mem->bus.addr) { 210 addr = mem->bus.addr; 211 } else { 212 addr = pmap_mapdev_attr(mem->bus.base + mem->bus.offset, 213 mem->bus.size, (mem->placement & TTM_PL_FLAG_WC) ? 214 VM_MEMATTR_WRITE_COMBINING : VM_MEMATTR_UNCACHEABLE); 215 if (!addr) { 216 (void) ttm_mem_io_lock(man, false); 217 ttm_mem_io_free(bdev, mem); 218 ttm_mem_io_unlock(man); 219 return -ENOMEM; 220 } 221 } 222 *virtual = addr; 223 return 0; 224 } 225 226 static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, 227 void *virtual) 228 { 229 struct ttm_mem_type_manager *man; 230 231 man = &bdev->man[mem->mem_type]; 232 233 if (virtual && mem->bus.addr == NULL) 234 pmap_unmapdev((vm_offset_t)virtual, mem->bus.size); 235 (void) ttm_mem_io_lock(man, false); 236 ttm_mem_io_free(bdev, mem); 237 ttm_mem_io_unlock(man); 238 } 239 240 static int ttm_copy_io_page(void *dst, void *src, unsigned long page) 241 { 242 uint32_t *dstP = 243 (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); 244 uint32_t *srcP = 245 (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); 246 247 int i; 248 for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) 249 /* iowrite32(ioread32(srcP++), dstP++); */ 250 *dstP++ = *srcP++; 251 return 0; 252 } 253 254 static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, 255 unsigned long page, 256 pgprot_t prot) 257 { 258 struct page *d = ttm->pages[page]; 259 void *dst; 260 261 if (!d) 262 return -ENOMEM; 263 264 src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); 265 266 #ifdef CONFIG_X86 267 dst = kmap_atomic_prot(d, prot); 268 #else 269 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 270 dst = vmap(&d, 1, 0, prot); 271 else 272 dst = kmap(d); 273 #endif 274 if (!dst) 275 return -ENOMEM; 276 277 memcpy_fromio(dst, src, PAGE_SIZE); 278 279 #ifdef CONFIG_X86 280 kunmap_atomic(dst); 281 #else 282 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 283 vunmap(dst); 284 else 285 kunmap(d); 286 #endif 287 288 return 0; 289 } 290 291 static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, 292 unsigned long page, 293 pgprot_t prot) 294 { 295 struct page *s = ttm->pages[page]; 296 void *src; 297 298 if (!s) 299 return -ENOMEM; 300 301 dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); 302 #ifdef CONFIG_X86 303 src = kmap_atomic_prot(s, prot); 304 #else 305 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 306 src = vmap(&s, 1, 0, prot); 307 else 308 src = kmap(s); 309 #endif 310 if (!src) 311 return -ENOMEM; 312 313 memcpy_toio(dst, src, PAGE_SIZE); 314 315 #ifdef CONFIG_X86 316 kunmap_atomic(src); 317 #else 318 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 319 vunmap(src); 320 else 321 kunmap(s); 322 #endif 323 324 return 0; 325 } 326 327 int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, 328 bool evict, bool no_wait_gpu, 329 struct ttm_mem_reg *new_mem) 330 { 331 struct ttm_bo_device *bdev = bo->bdev; 332 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 333 struct ttm_tt *ttm = bo->ttm; 334 struct ttm_mem_reg *old_mem = &bo->mem; 335 struct ttm_mem_reg old_copy = *old_mem; 336 void *old_iomap; 337 void *new_iomap; 338 int ret; 339 unsigned long i; 340 unsigned long page; 341 unsigned long add = 0; 342 int dir; 343 344 ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); 345 if (ret) 346 return ret; 347 ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); 348 if (ret) 349 goto out; 350 351 /* 352 * Single TTM move. NOP. 353 */ 354 if (old_iomap == NULL && new_iomap == NULL) 355 goto out2; 356 357 /* 358 * Don't move nonexistent data. Clear destination instead. 359 */ 360 if (old_iomap == NULL && 361 (ttm == NULL || (ttm->state == tt_unpopulated && 362 !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) { 363 memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE); 364 goto out2; 365 } 366 367 /* 368 * TTM might be null for moves within the same region. 369 */ 370 if (ttm && ttm->state == tt_unpopulated) { 371 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 372 if (ret) 373 goto out1; 374 } 375 376 add = 0; 377 dir = 1; 378 379 if ((old_mem->mem_type == new_mem->mem_type) && 380 (new_mem->start < old_mem->start + old_mem->size)) { 381 dir = -1; 382 add = new_mem->num_pages - 1; 383 } 384 385 for (i = 0; i < new_mem->num_pages; ++i) { 386 page = i * dir + add; 387 if (old_iomap == NULL) { 388 pgprot_t prot = ttm_io_prot(old_mem->placement, 389 PAGE_KERNEL); 390 ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, 391 prot); 392 } else if (new_iomap == NULL) { 393 pgprot_t prot = ttm_io_prot(new_mem->placement, 394 PAGE_KERNEL); 395 ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, 396 prot); 397 } else 398 ret = ttm_copy_io_page(new_iomap, old_iomap, page); 399 if (ret) { 400 /* failing here, means keep old copy as-is */ 401 old_copy.mm_node = NULL; 402 goto out1; 403 } 404 } 405 cpu_mfence(); 406 out2: 407 old_copy = *old_mem; 408 *old_mem = *new_mem; 409 new_mem->mm_node = NULL; 410 411 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { 412 ttm_tt_unbind(ttm); 413 ttm_tt_destroy(ttm); 414 bo->ttm = NULL; 415 } 416 417 out1: 418 ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); 419 out: 420 ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); 421 422 /* 423 * On error, keep the mm node! 424 */ 425 if (!ret) 426 ttm_bo_mem_put(bo, &old_copy); 427 return ret; 428 } 429 EXPORT_SYMBOL(ttm_bo_move_memcpy); 430 431 static void ttm_transfered_destroy(struct ttm_buffer_object *bo) 432 { 433 kfree(bo); 434 } 435 436 /** 437 * ttm_buffer_object_transfer 438 * 439 * @bo: A pointer to a struct ttm_buffer_object. 440 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, 441 * holding the data of @bo with the old placement. 442 * 443 * This is a utility function that may be called after an accelerated move 444 * has been scheduled. A new buffer object is created as a placeholder for 445 * the old data while it's being copied. When that buffer object is idle, 446 * it can be destroyed, releasing the space of the old placement. 447 * Returns: 448 * !0: Failure. 449 */ 450 451 static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, 452 struct ttm_buffer_object **new_obj) 453 { 454 struct ttm_buffer_object *fbo; 455 struct ttm_bo_device *bdev = bo->bdev; 456 struct ttm_bo_driver *driver = bdev->driver; 457 int ret; 458 459 fbo = kmalloc(sizeof(*fbo), M_DRM, M_WAITOK); 460 if (!fbo) 461 return -ENOMEM; 462 463 *fbo = *bo; 464 465 /** 466 * Fix up members that we shouldn't copy directly: 467 * TODO: Explicit member copy would probably be better here. 468 */ 469 470 INIT_LIST_HEAD(&fbo->ddestroy); 471 INIT_LIST_HEAD(&fbo->lru); 472 INIT_LIST_HEAD(&fbo->swap); 473 INIT_LIST_HEAD(&fbo->io_reserve_lru); 474 drm_vma_node_reset(&fbo->vma_node); 475 atomic_set(&fbo->cpu_writers, 0); 476 477 lockmgr(&bdev->fence_lock, LK_EXCLUSIVE); 478 if (bo->sync_obj) 479 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); 480 else 481 fbo->sync_obj = NULL; 482 lockmgr(&bdev->fence_lock, LK_RELEASE); 483 kref_init(&fbo->list_kref); 484 kref_init(&fbo->kref); 485 fbo->destroy = &ttm_transfered_destroy; 486 fbo->acc_size = 0; 487 fbo->resv = &fbo->ttm_resv; 488 reservation_object_init(fbo->resv); 489 ret = ww_mutex_trylock(&fbo->resv->lock); 490 WARN_ON(!ret); 491 492 /* 493 * Mirror ref from kref_init() for list_kref. 494 */ 495 set_bit(TTM_BO_PRIV_FLAG_ACTIVE, &fbo->priv_flags); 496 497 *new_obj = fbo; 498 return 0; 499 } 500 501 pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) 502 { 503 #if defined(__i386__) || defined(__x86_64__) 504 if (caching_flags & TTM_PL_FLAG_WC) 505 tmp = pgprot_writecombine(tmp); 506 else 507 tmp = pgprot_noncached(tmp); 508 509 #elif defined(__powerpc__) 510 if (!(caching_flags & TTM_PL_FLAG_CACHED)) { 511 pgprot_val(tmp) |= _PAGE_NO_CACHE; 512 if (caching_flags & TTM_PL_FLAG_UNCACHED) 513 pgprot_val(tmp) |= _PAGE_GUARDED; 514 } 515 #endif 516 #if defined(__ia64__) 517 if (caching_flags & TTM_PL_FLAG_WC) 518 tmp = pgprot_writecombine(tmp); 519 else 520 tmp = pgprot_noncached(tmp); 521 #endif 522 #if defined(__sparc__) || defined(__mips__) 523 if (!(caching_flags & TTM_PL_FLAG_CACHED)) 524 tmp = pgprot_noncached(tmp); 525 #endif 526 return tmp; 527 } 528 EXPORT_SYMBOL(ttm_io_prot); 529 530 static int ttm_bo_ioremap(struct ttm_buffer_object *bo, 531 unsigned long offset, 532 unsigned long size, 533 struct ttm_bo_kmap_obj *map) 534 { 535 struct ttm_mem_reg *mem = &bo->mem; 536 537 if (bo->mem.bus.addr) { 538 map->bo_kmap_type = ttm_bo_map_premapped; 539 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); 540 } else { 541 map->bo_kmap_type = ttm_bo_map_iomap; 542 if (mem->placement & TTM_PL_FLAG_WC) 543 map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, 544 size); 545 else 546 map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, 547 size); 548 } 549 return (!map->virtual) ? -ENOMEM : 0; 550 } 551 552 static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, 553 unsigned long start_page, 554 unsigned long num_pages, 555 struct ttm_bo_kmap_obj *map) 556 { 557 struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; 558 struct ttm_tt *ttm = bo->ttm; 559 int ret; 560 561 BUG_ON(!ttm); 562 563 if (ttm->state == tt_unpopulated) { 564 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 565 if (ret) 566 return ret; 567 } 568 569 if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { 570 /* 571 * We're mapping a single page, and the desired 572 * page protection is consistent with the bo. 573 */ 574 575 map->bo_kmap_type = ttm_bo_map_kmap; 576 map->page = ttm->pages[start_page]; 577 map->virtual = kmap(map->page); 578 } else { 579 /* 580 * We need to use vmap to get the desired page protection 581 * or to make the buffer object look contiguous. 582 */ 583 prot = (mem->placement & TTM_PL_FLAG_CACHED) ? 584 PAGE_KERNEL : 585 ttm_io_prot(mem->placement, PAGE_KERNEL); 586 map->bo_kmap_type = ttm_bo_map_vmap; 587 map->virtual = vmap(ttm->pages + start_page, num_pages, 588 0, prot); 589 } 590 return (!map->virtual) ? -ENOMEM : 0; 591 } 592 593 int ttm_bo_kmap(struct ttm_buffer_object *bo, 594 unsigned long start_page, unsigned long num_pages, 595 struct ttm_bo_kmap_obj *map) 596 { 597 struct ttm_mem_type_manager *man = 598 &bo->bdev->man[bo->mem.mem_type]; 599 unsigned long offset, size; 600 int ret; 601 602 BUG_ON(!list_empty(&bo->swap)); 603 map->virtual = NULL; 604 map->bo = bo; 605 if (num_pages > bo->num_pages) 606 return -EINVAL; 607 if (start_page > bo->num_pages) 608 return -EINVAL; 609 #if 0 610 if (num_pages > 1 && !capable(CAP_SYS_ADMIN)) 611 return -EPERM; 612 #endif 613 (void) ttm_mem_io_lock(man, false); 614 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); 615 ttm_mem_io_unlock(man); 616 if (ret) 617 return ret; 618 if (!bo->mem.bus.is_iomem) { 619 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); 620 } else { 621 offset = start_page << PAGE_SHIFT; 622 size = num_pages << PAGE_SHIFT; 623 return ttm_bo_ioremap(bo, offset, size, map); 624 } 625 } 626 EXPORT_SYMBOL(ttm_bo_kmap); 627 628 void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) 629 { 630 struct ttm_buffer_object *bo = map->bo; 631 struct ttm_mem_type_manager *man = 632 &bo->bdev->man[bo->mem.mem_type]; 633 634 if (!map->virtual) 635 return; 636 switch (map->bo_kmap_type) { 637 case ttm_bo_map_iomap: 638 iounmap(map->virtual); 639 break; 640 case ttm_bo_map_vmap: 641 vunmap(map->virtual); 642 break; 643 case ttm_bo_map_kmap: 644 kunmap(map->page); 645 break; 646 case ttm_bo_map_premapped: 647 break; 648 default: 649 BUG(); 650 } 651 (void) ttm_mem_io_lock(man, false); 652 ttm_mem_io_free(map->bo->bdev, &map->bo->mem); 653 ttm_mem_io_unlock(man); 654 map->virtual = NULL; 655 map->page = NULL; 656 } 657 EXPORT_SYMBOL(ttm_bo_kunmap); 658 659 int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, 660 void *sync_obj, 661 bool evict, 662 bool no_wait_gpu, 663 struct ttm_mem_reg *new_mem) 664 { 665 struct ttm_bo_device *bdev = bo->bdev; 666 struct ttm_bo_driver *driver = bdev->driver; 667 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 668 struct ttm_mem_reg *old_mem = &bo->mem; 669 int ret; 670 struct ttm_buffer_object *ghost_obj; 671 void *tmp_obj = NULL; 672 673 lockmgr(&bdev->fence_lock, LK_EXCLUSIVE); 674 if (bo->sync_obj) { 675 tmp_obj = bo->sync_obj; 676 bo->sync_obj = NULL; 677 } 678 bo->sync_obj = driver->sync_obj_ref(sync_obj); 679 if (evict) { 680 ret = ttm_bo_wait(bo, false, false, false); 681 lockmgr(&bdev->fence_lock, LK_RELEASE); 682 if (tmp_obj) 683 driver->sync_obj_unref(&tmp_obj); 684 if (ret) 685 return ret; 686 687 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && 688 (bo->ttm != NULL)) { 689 ttm_tt_unbind(bo->ttm); 690 ttm_tt_destroy(bo->ttm); 691 bo->ttm = NULL; 692 } 693 ttm_bo_free_old_node(bo); 694 } else { 695 /** 696 * This should help pipeline ordinary buffer moves. 697 * 698 * Hang old buffer memory on a new buffer object, 699 * and leave it to be released when the GPU 700 * operation has completed. 701 */ 702 703 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); 704 lockmgr(&bdev->fence_lock, LK_RELEASE); 705 if (tmp_obj) 706 driver->sync_obj_unref(&tmp_obj); 707 708 ret = ttm_buffer_object_transfer(bo, &ghost_obj); 709 if (ret) 710 return ret; 711 712 /** 713 * If we're not moving to fixed memory, the TTM object 714 * needs to stay alive. Otherwhise hang it on the ghost 715 * bo to be unbound and destroyed. 716 */ 717 718 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) 719 ghost_obj->ttm = NULL; 720 else 721 bo->ttm = NULL; 722 723 ttm_bo_unreserve(ghost_obj); 724 ttm_bo_unref(&ghost_obj); 725 } 726 727 *old_mem = *new_mem; 728 new_mem->mm_node = NULL; 729 730 return 0; 731 } 732 EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); 733