ttm_bo_util.c revision 1.8
1/* $OpenBSD: ttm_bo_util.c,v 1.8 2015/02/10 10:50:49 jsg Exp $ */ 2/************************************************************************** 3 * 4 * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 25 * USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28/* 29 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> 30 */ 31 32#include <dev/pci/drm/ttm/ttm_bo_driver.h> 33#include <dev/pci/drm/ttm/ttm_placement.h> 34#include <dev/pci/drm/refcount.h> 35 36int ttm_mem_reg_ioremap(struct ttm_bo_device *, struct ttm_mem_reg *, 37 void **); 38void ttm_mem_reg_iounmap(struct ttm_bo_device *, struct ttm_mem_reg *, 39 void *); 40 41void *kmap(struct vm_page *); 42void kunmap(void *addr); 43void *vmap(struct vm_page **, unsigned int, unsigned long, pgprot_t); 44void vunmap(void *, size_t); 45 46void ttm_bo_free_old_node(struct ttm_buffer_object *bo) 47{ 48 ttm_bo_mem_put(bo, &bo->mem); 49} 50 51int ttm_bo_move_ttm(struct ttm_buffer_object *bo, 52 bool evict, 53 bool no_wait_gpu, struct ttm_mem_reg *new_mem) 54{ 55 struct ttm_tt *ttm = bo->ttm; 56 struct ttm_mem_reg *old_mem = &bo->mem; 57 int ret; 58 59 if (old_mem->mem_type != TTM_PL_SYSTEM) { 60 ttm_tt_unbind(ttm); 61 ttm_bo_free_old_node(bo); 62 ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, 63 TTM_PL_MASK_MEM); 64 old_mem->mem_type = TTM_PL_SYSTEM; 65 } 66 67 ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); 68 if (unlikely(ret != 0)) 69 return ret; 70 71 if (new_mem->mem_type != TTM_PL_SYSTEM) { 72 ret = ttm_tt_bind(ttm, new_mem); 73 if (unlikely(ret != 0)) 74 return ret; 75 } 76 77 *old_mem = *new_mem; 78 new_mem->mm_node = NULL; 79 80 return 0; 81} 82EXPORT_SYMBOL(ttm_bo_move_ttm); 83 84int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) 85{ 86 if (likely(man->io_reserve_fastpath)) 87 return 0; 88 89 if (interruptible) 90 return mutex_lock_interruptible(&man->io_reserve_mutex); 91 92 mutex_lock(&man->io_reserve_mutex); 93 return 0; 94} 95 96void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) 97{ 98 if (likely(man->io_reserve_fastpath)) 99 return; 100 101 mutex_unlock(&man->io_reserve_mutex); 102} 103 104static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) 105{ 106 struct ttm_buffer_object *bo; 107 108 if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) 109 return -EAGAIN; 110 111 bo = list_first_entry(&man->io_reserve_lru, 112 struct ttm_buffer_object, 113 io_reserve_lru); 114 list_del_init(&bo->io_reserve_lru); 115 ttm_bo_unmap_virtual_locked(bo); 116 117 return 0; 118} 119 120static int ttm_mem_io_reserve(struct ttm_bo_device *bdev, 121 struct ttm_mem_reg *mem) 122{ 123 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 124 int ret = 0; 125 126 if (!bdev->driver->io_mem_reserve) 127 return 0; 128 if (likely(man->io_reserve_fastpath)) 129 return bdev->driver->io_mem_reserve(bdev, mem); 130 131 if (bdev->driver->io_mem_reserve && 132 mem->bus.io_reserved_count++ == 0) { 133retry: 134 ret = bdev->driver->io_mem_reserve(bdev, mem); 135 if (ret == -EAGAIN) { 136 ret = ttm_mem_io_evict(man); 137 if (ret == 0) 138 goto retry; 139 } 140 } 141 return ret; 142} 143 144static void 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} 158 159int 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 179void 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 190int 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 int flags; 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 flags = BUS_SPACE_MAP_PREFETCHABLE; 210 else 211 flags = 0; 212 213 if (bus_space_map(bdev->memt, mem->bus.base + mem->bus.offset, 214 mem->bus.size, BUS_SPACE_MAP_LINEAR | flags, &mem->bus.bsh)) { 215 printf("%s bus_space_map failed\n", __func__); 216 return -ENOMEM; 217 } 218 219 addr = bus_space_vaddr(bdev->memt, mem->bus.bsh); 220 221 if (!addr) { 222 (void) ttm_mem_io_lock(man, false); 223 ttm_mem_io_free(bdev, mem); 224 ttm_mem_io_unlock(man); 225 return -ENOMEM; 226 } 227 } 228 *virtual = addr; 229 return 0; 230} 231 232void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, 233 void *virtual) 234{ 235 struct ttm_mem_type_manager *man; 236 237 man = &bdev->man[mem->mem_type]; 238 239 if (virtual && mem->bus.addr == NULL) 240 bus_space_unmap(bdev->memt, mem->bus.bsh, mem->bus.size); 241 (void) ttm_mem_io_lock(man, false); 242 ttm_mem_io_free(bdev, mem); 243 ttm_mem_io_unlock(man); 244} 245 246static int ttm_copy_io_page(void *dst, void *src, unsigned long page) 247{ 248 uint32_t *dstP = 249 (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); 250 uint32_t *srcP = 251 (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); 252 253 int i; 254 for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) 255#ifdef notyet 256 iowrite32(ioread32(srcP++), dstP++); 257#else 258 *dstP++ = *srcP++; 259#endif 260 return 0; 261} 262 263static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, 264 unsigned long page, 265 pgprot_t prot) 266{ 267 struct vm_page *d = ttm->pages[page]; 268 void *dst; 269 270 if (!d) 271 return -ENOMEM; 272 273 src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); 274 275 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 276 dst = vmap(&d, 1, 0, prot); 277 else 278 dst = kmap(d); 279 if (!dst) 280 return -ENOMEM; 281 282 memcpy(dst, src, PAGE_SIZE); 283 284 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 285 vunmap(dst, PAGE_SIZE); 286 else 287 kunmap(d); 288 289 return 0; 290} 291 292static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, 293 unsigned long page, 294 vm_prot_t prot) 295{ 296 struct vm_page *s = ttm->pages[page]; 297 void *src; 298 299 if (!s) 300 return -ENOMEM; 301 302 dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); 303 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 304 src = vmap(&s, 1, 0, prot); 305 else 306 src = kmap(s); 307 if (!src) 308 return -ENOMEM; 309 310#define memcpy_toio(d, s, n) memcpy(d, s, n) 311 memcpy_toio(dst, src, PAGE_SIZE); 312 313 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) 314 vunmap(src, PAGE_SIZE); 315 else 316 kunmap(s); 317 318 return 0; 319} 320 321int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, 322 bool evict, bool no_wait_gpu, 323 struct ttm_mem_reg *new_mem) 324{ 325 struct ttm_bo_device *bdev = bo->bdev; 326 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 327 struct ttm_tt *ttm = bo->ttm; 328 struct ttm_mem_reg *old_mem = &bo->mem; 329 struct ttm_mem_reg old_copy = *old_mem; 330 void *old_iomap; 331 void *new_iomap; 332 int ret; 333 unsigned long i; 334 unsigned long page; 335 unsigned long add = 0; 336 int dir; 337 338 ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); 339 if (ret) 340 return ret; 341 ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); 342 if (ret) 343 goto out; 344 345 /* 346 * Single TTM move. NOP. 347 */ 348 if (old_iomap == NULL && new_iomap == NULL) 349 goto out2; 350 351 /* 352 * Move nonexistent data. NOP. 353 */ 354 if (old_iomap == NULL && ttm == NULL) 355 goto out2; 356 357 /* 358 * TTM might be null for moves within the same region. 359 */ 360 if (ttm && ttm->state == tt_unpopulated) { 361 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 362 if (ret) 363 goto out1; 364 } 365 366 add = 0; 367 dir = 1; 368 369 if ((old_mem->mem_type == new_mem->mem_type) && 370 (new_mem->start < old_mem->start + old_mem->size)) { 371 dir = -1; 372 add = new_mem->num_pages - 1; 373 } 374 375 for (i = 0; i < new_mem->num_pages; ++i) { 376 page = i * dir + add; 377 if (old_iomap == NULL) { 378 pgprot_t prot = ttm_io_prot(old_mem->placement, 379 PAGE_KERNEL); 380 ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, 381 prot); 382 } else if (new_iomap == NULL) { 383 pgprot_t prot = ttm_io_prot(new_mem->placement, 384 PAGE_KERNEL); 385 ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, 386 prot); 387 } else 388 ret = ttm_copy_io_page(new_iomap, old_iomap, page); 389 if (ret) 390 goto out1; 391 } 392 DRM_MEMORYBARRIER(); 393out2: 394 old_copy = *old_mem; 395 *old_mem = *new_mem; 396 new_mem->mm_node = NULL; 397 398 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) { 399 ttm_tt_unbind(ttm); 400 ttm_tt_destroy(ttm); 401 bo->ttm = NULL; 402 } 403 404out1: 405 ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); 406out: 407 ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); 408 409 /* 410 * On error, keep the mm node! 411 */ 412 if (!ret) 413 ttm_bo_mem_put(bo, &old_copy); 414 return ret; 415} 416EXPORT_SYMBOL(ttm_bo_move_memcpy); 417 418static void ttm_transfered_destroy(struct ttm_buffer_object *bo) 419{ 420 kfree(bo); 421} 422 423/** 424 * ttm_buffer_object_transfer 425 * 426 * @bo: A pointer to a struct ttm_buffer_object. 427 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, 428 * holding the data of @bo with the old placement. 429 * 430 * This is a utility function that may be called after an accelerated move 431 * has been scheduled. A new buffer object is created as a placeholder for 432 * the old data while it's being copied. When that buffer object is idle, 433 * it can be destroyed, releasing the space of the old placement. 434 * Returns: 435 * !0: Failure. 436 */ 437 438static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, 439 struct ttm_buffer_object **new_obj) 440{ 441 struct ttm_buffer_object *fbo; 442 struct ttm_bo_device *bdev = bo->bdev; 443 struct ttm_bo_driver *driver = bdev->driver; 444 445 fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); 446 if (!fbo) 447 return -ENOMEM; 448 449 *fbo = *bo; 450 451 /** 452 * Fix up members that we shouldn't copy directly: 453 * TODO: Explicit member copy would probably be better here. 454 */ 455 456#ifdef notyet 457 init_waitqueue_head(&fbo->event_queue); 458#endif 459 INIT_LIST_HEAD(&fbo->ddestroy); 460 INIT_LIST_HEAD(&fbo->lru); 461 INIT_LIST_HEAD(&fbo->swap); 462 INIT_LIST_HEAD(&fbo->io_reserve_lru); 463 fbo->vm_node = NULL; 464 atomic_set(&fbo->cpu_writers, 0); 465 466 spin_lock(&bdev->fence_lock); 467 if (bo->sync_obj) 468 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj); 469 else 470 fbo->sync_obj = NULL; 471 spin_unlock(&bdev->fence_lock); 472 refcount_init(&fbo->list_kref, 1); 473 refcount_init(&fbo->kref, 1); 474 fbo->destroy = &ttm_transfered_destroy; 475 fbo->acc_size = 0; 476 477 *new_obj = fbo; 478 return 0; 479} 480 481pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) 482{ 483#ifdef PMAP_WC 484 if (caching_flags & TTM_PL_FLAG_WC) 485 return PMAP_WC; 486 else 487#endif 488 return PMAP_NOCACHE; 489} 490EXPORT_SYMBOL(ttm_io_prot); 491 492static int ttm_bo_ioremap(struct ttm_buffer_object *bo, 493 unsigned long offset, 494 unsigned long size, 495 struct ttm_bo_kmap_obj *map) 496{ 497 struct ttm_mem_reg *mem = &bo->mem; 498 int flags; 499 500 if (bo->mem.bus.addr) { 501 map->bo_kmap_type = ttm_bo_map_premapped; 502 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); 503 } else { 504 map->bo_kmap_type = ttm_bo_map_iomap; 505 if (mem->placement & TTM_PL_FLAG_WC) 506 flags = BUS_SPACE_MAP_PREFETCHABLE; 507 else 508 flags = 0; 509 510 if (bus_space_map(bo->bdev->memt, 511 mem->bus.base + bo->mem.bus.offset + offset, 512 size, BUS_SPACE_MAP_LINEAR | flags, 513 &bo->mem.bus.bsh)) { 514 printf("%s bus_space_map failed\n", __func__); 515 map->virtual = 0; 516 } else 517 map->virtual = bus_space_vaddr(bo->bdev->memt, 518 bo->mem.bus.bsh); 519 } 520 return (!map->virtual) ? -ENOMEM : 0; 521} 522 523void * 524kmap(struct vm_page *pg) 525{ 526 vaddr_t va; 527 528#if defined (__HAVE_PMAP_DIRECT) 529 va = pmap_map_direct(pg); 530#else 531 va = uvm_km_valloc(kernel_map, PAGE_SIZE); 532 if (va == 0) 533 return (NULL); 534 pmap_kenter_pa(va, VM_PAGE_TO_PHYS(pg), PROT_READ | PROT_WRITE); 535 pmap_update(pmap_kernel()); 536#endif 537 return (void *)va; 538} 539 540void 541kunmap(void *addr) 542{ 543 vaddr_t va = (vaddr_t)addr; 544 545#if defined (__HAVE_PMAP_DIRECT) 546 pmap_unmap_direct(va); 547#else 548 pmap_kremove(va, PAGE_SIZE); 549 pmap_update(pmap_kernel()); 550 uvm_km_free(kernel_map, va, PAGE_SIZE); 551#endif 552} 553 554void * 555vmap(struct vm_page **pages, unsigned int npages, unsigned long flags, 556 pgprot_t prot) 557{ 558 vaddr_t va; 559 paddr_t pa; 560 int i; 561 562 va = uvm_km_valloc(kernel_map, PAGE_SIZE * npages); 563 if (va == 0) 564 return NULL; 565 for (i = 0; i < npages; i++) { 566 pa = VM_PAGE_TO_PHYS(pages[i]) | prot; 567 pmap_enter(pmap_kernel(), va + (i * PAGE_SIZE), pa, 568 PROT_READ | PROT_WRITE, 569 PROT_READ | PROT_WRITE | PMAP_WIRED); 570 pmap_update(pmap_kernel()); 571 } 572 573 return (void *)va; 574} 575 576void 577vunmap(void *addr, size_t size) 578{ 579 vaddr_t va = (vaddr_t)addr; 580 581 pmap_remove(pmap_kernel(), va, va + size); 582 pmap_update(pmap_kernel()); 583 uvm_km_free(kernel_map, va, size); 584} 585 586static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, 587 unsigned long start_page, 588 unsigned long num_pages, 589 struct ttm_bo_kmap_obj *map) 590{ 591 struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; 592 struct ttm_tt *ttm = bo->ttm; 593 int ret; 594 595 BUG_ON(!ttm); 596 597 if (ttm->state == tt_unpopulated) { 598 ret = ttm->bdev->driver->ttm_tt_populate(ttm); 599 if (ret) 600 return ret; 601 } 602 603 if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { 604 /* 605 * We're mapping a single page, and the desired 606 * page protection is consistent with the bo. 607 */ 608 609 map->bo_kmap_type = ttm_bo_map_kmap; 610 map->page = ttm->pages[start_page]; 611 map->virtual = kmap(map->page); 612 } else { 613 /* 614 * We need to use vmap to get the desired page protection 615 * or to make the buffer object look contiguous. 616 */ 617 prot = (mem->placement & TTM_PL_FLAG_CACHED) ? 618 PAGE_KERNEL : 619 ttm_io_prot(mem->placement, PAGE_KERNEL); 620 map->bo_kmap_type = ttm_bo_map_vmap; 621 map->virtual = vmap(ttm->pages + start_page, num_pages, 622 0, prot); 623 } 624 return (!map->virtual) ? -ENOMEM : 0; 625} 626 627int ttm_bo_kmap(struct ttm_buffer_object *bo, 628 unsigned long start_page, unsigned long num_pages, 629 struct ttm_bo_kmap_obj *map) 630{ 631 struct ttm_mem_type_manager *man = 632 &bo->bdev->man[bo->mem.mem_type]; 633 unsigned long offset, size; 634 int ret; 635 636 BUG_ON(!list_empty(&bo->swap)); 637 map->virtual = NULL; 638 map->bo = bo; 639 if (num_pages > bo->num_pages) 640 return -EINVAL; 641 if (start_page > bo->num_pages) 642 return -EINVAL; 643#if 0 644 if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC)) 645 return -EPERM; 646#endif 647 (void) ttm_mem_io_lock(man, false); 648 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); 649 ttm_mem_io_unlock(man); 650 if (ret) 651 return ret; 652 if (!bo->mem.bus.is_iomem) { 653 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); 654 } else { 655 offset = start_page << PAGE_SHIFT; 656 size = num_pages << PAGE_SHIFT; 657 return ttm_bo_ioremap(bo, offset, size, map); 658 } 659} 660EXPORT_SYMBOL(ttm_bo_kmap); 661 662void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) 663{ 664 struct ttm_buffer_object *bo = map->bo; 665 struct ttm_mem_type_manager *man = 666 &bo->bdev->man[bo->mem.mem_type]; 667 668 if (!map->virtual) 669 return; 670 switch (map->bo_kmap_type) { 671 case ttm_bo_map_iomap: 672 bus_space_unmap(bo->bdev->memt, bo->mem.bus.bsh, 673 bo->mem.bus.size); 674 break; 675 case ttm_bo_map_vmap: 676 vunmap(map->virtual, bo->mem.bus.size); 677 break; 678 case ttm_bo_map_kmap: 679 kunmap(map->virtual); 680 break; 681 case ttm_bo_map_premapped: 682 break; 683 default: 684 BUG(); 685 } 686 (void) ttm_mem_io_lock(man, false); 687 ttm_mem_io_free(map->bo->bdev, &map->bo->mem); 688 ttm_mem_io_unlock(man); 689 map->virtual = NULL; 690 map->page = NULL; 691} 692EXPORT_SYMBOL(ttm_bo_kunmap); 693 694int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, 695 void *sync_obj, 696 bool evict, 697 bool no_wait_gpu, 698 struct ttm_mem_reg *new_mem) 699{ 700 struct ttm_bo_device *bdev = bo->bdev; 701 struct ttm_bo_driver *driver = bdev->driver; 702 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; 703 struct ttm_mem_reg *old_mem = &bo->mem; 704 int ret; 705 struct ttm_buffer_object *ghost_obj; 706 void *tmp_obj = NULL; 707 708 spin_lock(&bdev->fence_lock); 709 if (bo->sync_obj) { 710 tmp_obj = bo->sync_obj; 711 bo->sync_obj = NULL; 712 } 713 bo->sync_obj = driver->sync_obj_ref(sync_obj); 714 if (evict) { 715 ret = ttm_bo_wait(bo, false, false, false); 716 spin_unlock(&bdev->fence_lock); 717 if (tmp_obj) 718 driver->sync_obj_unref(&tmp_obj); 719 if (ret) 720 return ret; 721 722 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && 723 (bo->ttm != NULL)) { 724 ttm_tt_unbind(bo->ttm); 725 ttm_tt_destroy(bo->ttm); 726 bo->ttm = NULL; 727 } 728 ttm_bo_free_old_node(bo); 729 } else { 730 /** 731 * This should help pipeline ordinary buffer moves. 732 * 733 * Hang old buffer memory on a new buffer object, 734 * and leave it to be released when the GPU 735 * operation has completed. 736 */ 737 738 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags); 739 spin_unlock(&bdev->fence_lock); 740 if (tmp_obj) 741 driver->sync_obj_unref(&tmp_obj); 742 743 ret = ttm_buffer_object_transfer(bo, &ghost_obj); 744 if (ret) 745 return ret; 746 747 /** 748 * If we're not moving to fixed memory, the TTM object 749 * needs to stay alive. Otherwhise hang it on the ghost 750 * bo to be unbound and destroyed. 751 */ 752 753 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) 754 ghost_obj->ttm = NULL; 755 else 756 bo->ttm = NULL; 757 758 ttm_bo_unreserve(ghost_obj); 759 ttm_bo_unref(&ghost_obj); 760 } 761 762 *old_mem = *new_mem; 763 new_mem->mm_node = NULL; 764 765 return 0; 766} 767EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); 768