drivers/gpu/drm/ttm/ttm_bo_util.c

   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 <linux/io.h>
  34 #include <linux/highmem.h>
  35 #include <linux/wait.h>
  36 #include <linux/slab.h>
  37 #include <linux/vmalloc.h>
  38 #include <linux/module.h>
  39
  40 void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
  41 {
  42         ttm_bo_mem_put(bo, &bo->mem);
  43 }
  44
  45 int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
  46                     bool evict,
  47                     bool no_wait_gpu, struct ttm_mem_reg *new_mem)
  48 {
  49         struct ttm_tt *ttm = bo->ttm;
  50         struct ttm_mem_reg *old_mem = &bo->mem;
  51         int ret;
  52
  53         if (old_mem->mem_type != TTM_PL_SYSTEM) {
  54                 ttm_tt_unbind(ttm);
  55                 ttm_bo_free_old_node(bo);
  56                 ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
  57                                 TTM_PL_MASK_MEM);
  58                 old_mem->mem_type = TTM_PL_SYSTEM;
  59         }
  60
  61         ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
  62         if (unlikely(ret != 0))
  63                 return ret;
  64
  65         if (new_mem->mem_type != TTM_PL_SYSTEM) {
  66                 ret = ttm_tt_bind(ttm, new_mem);
  67                 if (unlikely(ret != 0))
  68                         return ret;
  69         }
  70
  71         *old_mem = *new_mem;
  72         new_mem->mm_node = NULL;
  73
  74         return 0;
  75 }
  76 EXPORT_SYMBOL(ttm_bo_move_ttm);
  77
  78 int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
  79 {
  80         if (likely(man->io_reserve_fastpath))
  81                 return 0;
  82
  83         if (interruptible)
  84                 return mutex_lock_interruptible(&man->io_reserve_mutex);
  85
  86         mutex_lock(&man->io_reserve_mutex);
  87         return 0;
  88 }
  89 EXPORT_SYMBOL(ttm_mem_io_lock);
  90
  91 void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
  92 {
  93         if (likely(man->io_reserve_fastpath))
  94                 return;
  95
  96         mutex_unlock(&man->io_reserve_mutex);
  97 }
  98 EXPORT_SYMBOL(ttm_mem_io_unlock);
  99
 100 static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
 101 {
 102         struct ttm_buffer_object *bo;
 103
 104         if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
 105                 return -EAGAIN;
 106
 107         bo = list_first_entry(&man->io_reserve_lru,
 108                               struct ttm_buffer_object,
 109                               io_reserve_lru);
 110         list_del_init(&bo->io_reserve_lru);
 111         ttm_bo_unmap_virtual_locked(bo);
 112
 113         return 0;
 114 }
 115
 116
 117 int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
 118                        struct ttm_mem_reg *mem)
 119 {
 120         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 121         int ret = 0;
 122
 123         if (!bdev->driver->io_mem_reserve)
 124                 return 0;
 125         if (likely(man->io_reserve_fastpath))
 126                 return bdev->driver->io_mem_reserve(bdev, mem);
 127
 128         if (bdev->driver->io_mem_reserve &&
 129             mem->bus.io_reserved_count++ == 0) {
 130 retry:
 131                 ret = bdev->driver->io_mem_reserve(bdev, mem);
 132                 if (ret == -EAGAIN) {
 133                         ret = ttm_mem_io_evict(man);
 134                         if (ret == 0)
 135                                 goto retry;
 136                 }
 137         }
 138         return ret;
 139 }
 140 EXPORT_SYMBOL(ttm_mem_io_reserve);
 141
 142 void ttm_mem_io_free(struct ttm_bo_device *bdev,
 143                      struct ttm_mem_reg *mem)
 144 {
 145         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 146
 147         if (likely(man->io_reserve_fastpath))
 148                 return;
 149
 150         if (bdev->driver->io_mem_reserve &&
 151             --mem->bus.io_reserved_count == 0 &&
 152             bdev->driver->io_mem_free)
 153                 bdev->driver->io_mem_free(bdev, mem);
 154
 155 }
 156 EXPORT_SYMBOL(ttm_mem_io_free);
 157
 158 int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
 159 {
 160         struct ttm_mem_reg *mem = &bo->mem;
 161         int ret;
 162
 163         if (!mem->bus.io_reserved_vm) {
 164                 struct ttm_mem_type_manager *man =
 165                         &bo->bdev->man[mem->mem_type];
 166
 167                 ret = ttm_mem_io_reserve(bo->bdev, mem);
 168                 if (unlikely(ret != 0))
 169                         return ret;
 170                 mem->bus.io_reserved_vm = true;
 171                 if (man->use_io_reserve_lru)
 172                         list_add_tail(&bo->io_reserve_lru,
 173                                       &man->io_reserve_lru);
 174         }
 175         return 0;
 176 }
 177
 178 void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
 179 {
 180         struct ttm_mem_reg *mem = &bo->mem;
 181
 182         if (mem->bus.io_reserved_vm) {
 183                 mem->bus.io_reserved_vm = false;
 184                 list_del_init(&bo->io_reserve_lru);
 185                 ttm_mem_io_free(bo->bdev, mem);
 186         }
 187 }
 188
 189 int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
 190                         void **virtual)
 191 {
 192         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 193         int ret;
 194         void *addr;
 195
 196         *virtual = NULL;
 197         (void) ttm_mem_io_lock(man, false);
 198         ret = ttm_mem_io_reserve(bdev, mem);
 199         ttm_mem_io_unlock(man);
 200         if (ret || !mem->bus.is_iomem)
 201                 return ret;
 202
 203         if (mem->bus.addr) {
 204                 addr = mem->bus.addr;
 205         } else {
 206                 if (mem->placement & TTM_PL_FLAG_WC)
 207                         addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
 208                 else
 209                         addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
 210                 if (!addr) {
 211                         (void) ttm_mem_io_lock(man, false);
 212                         ttm_mem_io_free(bdev, mem);
 213                         ttm_mem_io_unlock(man);
 214                         return -ENOMEM;
 215                 }
 216         }
 217         *virtual = addr;
 218         return 0;
 219 }
 220
 221 void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
 222                          void *virtual)
 223 {
 224         struct ttm_mem_type_manager *man;
 225
 226         man = &bdev->man[mem->mem_type];
 227
 228         if (virtual && mem->bus.addr == NULL)
 229                 iounmap(virtual);
 230         (void) ttm_mem_io_lock(man, false);
 231         ttm_mem_io_free(bdev, mem);
 232         ttm_mem_io_unlock(man);
 233 }
 234
 235 static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
 236 {
 237         uint32_t *dstP =
 238             (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
 239         uint32_t *srcP =
 240             (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
 241
 242         int i;
 243         for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
 244                 iowrite32(ioread32(srcP++), dstP++);
 245         return 0;
 246 }
 247
 248 static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
 249                                 unsigned long page,
 250                                 pgprot_t prot)
 251 {
 252         struct page *d = ttm->pages[page];
 253         void *dst;
 254
 255         if (!d)
 256                 return -ENOMEM;
 257
 258         src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
 259
 260 #ifdef CONFIG_X86
 261         dst = kmap_atomic_prot(d, prot);
 262 #else
 263         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
 264                 dst = vmap(&d, 1, 0, prot);
 265         else
 266                 dst = kmap(d);
 267 #endif
 268         if (!dst)
 269                 return -ENOMEM;
 270
 271         memcpy_fromio(dst, src, PAGE_SIZE);
 272
 273 #ifdef CONFIG_X86
 274         kunmap_atomic(dst);
 275 #else
 276         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
 277                 vunmap(dst);
 278         else
 279                 kunmap(d);
 280 #endif
 281
 282         return 0;
 283 }
 284
 285 static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
 286                                 unsigned long page,
 287                                 pgprot_t prot)
 288 {
 289         struct page *s = ttm->pages[page];
 290         void *src;
 291
 292         if (!s)
 293                 return -ENOMEM;
 294
 295         dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
 296 #ifdef CONFIG_X86
 297         src = kmap_atomic_prot(s, prot);
 298 #else
 299         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
 300                 src = vmap(&s, 1, 0, prot);
 301         else
 302                 src = kmap(s);
 303 #endif
 304         if (!src)
 305                 return -ENOMEM;
 306
 307         memcpy_toio(dst, src, PAGE_SIZE);
 308
 309 #ifdef CONFIG_X86
 310         kunmap_atomic(src);
 311 #else
 312         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
 313                 vunmap(src);
 314         else
 315                 kunmap(s);
 316 #endif
 317
 318         return 0;
 319 }
 320
 321 int 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         mb();
 393 out2:
 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
 404 out1:
 405         ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
 406 out:
 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 }
 416 EXPORT_SYMBOL(ttm_bo_move_memcpy);
 417
 418 static 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
 438 static 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         init_waitqueue_head(&fbo->event_queue);
 457         INIT_LIST_HEAD(&fbo->ddestroy);
 458         INIT_LIST_HEAD(&fbo->lru);
 459         INIT_LIST_HEAD(&fbo->swap);
 460         INIT_LIST_HEAD(&fbo->io_reserve_lru);
 461         fbo->vm_node = NULL;
 462         atomic_set(&fbo->cpu_writers, 0);
 463
 464         spin_lock(&bdev->fence_lock);
 465         if (bo->sync_obj)
 466                 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
 467         else
 468                 fbo->sync_obj = NULL;
 469         spin_unlock(&bdev->fence_lock);
 470         kref_init(&fbo->list_kref);
 471         kref_init(&fbo->kref);
 472         fbo->destroy = &ttm_transfered_destroy;
 473         fbo->acc_size = 0;
 474
 475         *new_obj = fbo;
 476         return 0;
 477 }
 478
 479 pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
 480 {
 481 #if defined(__i386__) || defined(__x86_64__)
 482         if (caching_flags & TTM_PL_FLAG_WC)
 483                 tmp = pgprot_writecombine(tmp);
 484         else if (boot_cpu_data.x86 > 3)
 485                 tmp = pgprot_noncached(tmp);
 486
 487 #elif defined(__powerpc__)
 488         if (!(caching_flags & TTM_PL_FLAG_CACHED)) {
 489                 pgprot_val(tmp) |= _PAGE_NO_CACHE;
 490                 if (caching_flags & TTM_PL_FLAG_UNCACHED)
 491                         pgprot_val(tmp) |= _PAGE_GUARDED;
 492         }
 493 #endif
 494 #if defined(__ia64__)
 495         if (caching_flags & TTM_PL_FLAG_WC)
 496                 tmp = pgprot_writecombine(tmp);
 497         else
 498                 tmp = pgprot_noncached(tmp);
 499 #endif
 500 #if defined(__sparc__) || defined(__mips__)
 501         if (!(caching_flags & TTM_PL_FLAG_CACHED))
 502                 tmp = pgprot_noncached(tmp);
 503 #endif
 504         return tmp;
 505 }
 506 EXPORT_SYMBOL(ttm_io_prot);
 507
 508 static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
 509                           unsigned long offset,
 510                           unsigned long size,
 511                           struct ttm_bo_kmap_obj *map)
 512 {
 513         struct ttm_mem_reg *mem = &bo->mem;
 514
 515         if (bo->mem.bus.addr) {
 516                 map->bo_kmap_type = ttm_bo_map_premapped;
 517                 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
 518         } else {
 519                 map->bo_kmap_type = ttm_bo_map_iomap;
 520                 if (mem->placement & TTM_PL_FLAG_WC)
 521                         map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
 522                                                   size);
 523                 else
 524                         map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
 525                                                        size);
 526         }
 527         return (!map->virtual) ? -ENOMEM : 0;
 528 }
 529
 530 static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
 531                            unsigned long start_page,
 532                            unsigned long num_pages,
 533                            struct ttm_bo_kmap_obj *map)
 534 {
 535         struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
 536         struct ttm_tt *ttm = bo->ttm;
 537         int ret;
 538
 539         BUG_ON(!ttm);
 540
 541         if (ttm->state == tt_unpopulated) {
 542                 ret = ttm->bdev->driver->ttm_tt_populate(ttm);
 543                 if (ret)
 544                         return ret;
 545         }
 546
 547         if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
 548                 /*
 549                  * We're mapping a single page, and the desired
 550                  * page protection is consistent with the bo.
 551                  */
 552
 553                 map->bo_kmap_type = ttm_bo_map_kmap;
 554                 map->page = ttm->pages[start_page];
 555                 map->virtual = kmap(map->page);
 556         } else {
 557                 /*
 558                  * We need to use vmap to get the desired page protection
 559                  * or to make the buffer object look contiguous.
 560                  */
 561                 prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
 562                         PAGE_KERNEL :
 563                         ttm_io_prot(mem->placement, PAGE_KERNEL);
 564                 map->bo_kmap_type = ttm_bo_map_vmap;
 565                 map->virtual = vmap(ttm->pages + start_page, num_pages,
 566                                     0, prot);
 567         }
 568         return (!map->virtual) ? -ENOMEM : 0;
 569 }
 570
 571 int ttm_bo_kmap(struct ttm_buffer_object *bo,
 572                 unsigned long start_page, unsigned long num_pages,
 573                 struct ttm_bo_kmap_obj *map)
 574 {
 575         struct ttm_mem_type_manager *man =
 576                 &bo->bdev->man[bo->mem.mem_type];
 577         unsigned long offset, size;
 578         int ret;
 579
 580         BUG_ON(!list_empty(&bo->swap));
 581         map->virtual = NULL;
 582         map->bo = bo;
 583         if (num_pages > bo->num_pages)
 584                 return -EINVAL;
 585         if (start_page > bo->num_pages)
 586                 return -EINVAL;
 587 #if 0
 588         if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC))
 589                 return -EPERM;
 590 #endif
 591         (void) ttm_mem_io_lock(man, false);
 592         ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
 593         ttm_mem_io_unlock(man);
 594         if (ret)
 595                 return ret;
 596         if (!bo->mem.bus.is_iomem) {
 597                 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
 598         } else {
 599                 offset = start_page << PAGE_SHIFT;
 600                 size = num_pages << PAGE_SHIFT;
 601                 return ttm_bo_ioremap(bo, offset, size, map);
 602         }
 603 }
 604 EXPORT_SYMBOL(ttm_bo_kmap);
 605
 606 void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
 607 {
 608         struct ttm_buffer_object *bo = map->bo;
 609         struct ttm_mem_type_manager *man =
 610                 &bo->bdev->man[bo->mem.mem_type];
 611
 612         if (!map->virtual)
 613                 return;
 614         switch (map->bo_kmap_type) {
 615         case ttm_bo_map_iomap:
 616                 iounmap(map->virtual);
 617                 break;
 618         case ttm_bo_map_vmap:
 619                 vunmap(map->virtual);
 620                 break;
 621         case ttm_bo_map_kmap:
 622                 kunmap(map->page);
 623                 break;
 624         case ttm_bo_map_premapped:
 625                 break;
 626         default:
 627                 BUG();
 628         }
 629         (void) ttm_mem_io_lock(man, false);
 630         ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
 631         ttm_mem_io_unlock(man);
 632         map->virtual = NULL;
 633         map->page = NULL;
 634 }
 635 EXPORT_SYMBOL(ttm_bo_kunmap);
 636
 637 int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
 638                               void *sync_obj,
 639                               bool evict,
 640                               bool no_wait_gpu,
 641                               struct ttm_mem_reg *new_mem)
 642 {
 643         struct ttm_bo_device *bdev = bo->bdev;
 644         struct ttm_bo_driver *driver = bdev->driver;
 645         struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
 646         struct ttm_mem_reg *old_mem = &bo->mem;
 647         int ret;
 648         struct ttm_buffer_object *ghost_obj;
 649         void *tmp_obj = NULL;
 650
 651         spin_lock(&bdev->fence_lock);
 652         if (bo->sync_obj) {
 653                 tmp_obj = bo->sync_obj;
 654                 bo->sync_obj = NULL;
 655         }
 656         bo->sync_obj = driver->sync_obj_ref(sync_obj);
 657         if (evict) {
 658                 ret = ttm_bo_wait(bo, false, false, false);
 659                 spin_unlock(&bdev->fence_lock);
 660                 if (tmp_obj)
 661                         driver->sync_obj_unref(&tmp_obj);
 662                 if (ret)
 663                         return ret;
 664
 665                 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
 666                     (bo->ttm != NULL)) {
 667                         ttm_tt_unbind(bo->ttm);
 668                         ttm_tt_destroy(bo->ttm);
 669                         bo->ttm = NULL;
 670                 }
 671                 ttm_bo_free_old_node(bo);
 672         } else {
 673                 /**
 674                  * This should help pipeline ordinary buffer moves.
 675                  *
 676                  * Hang old buffer memory on a new buffer object,
 677                  * and leave it to be released when the GPU
 678                  * operation has completed.
 679                  */
 680
 681                 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
 682                 spin_unlock(&bdev->fence_lock);
 683                 if (tmp_obj)
 684                         driver->sync_obj_unref(&tmp_obj);
 685
 686                 ret = ttm_buffer_object_transfer(bo, &ghost_obj);
 687                 if (ret)
 688                         return ret;
 689
 690                 /**
 691                  * If we're not moving to fixed memory, the TTM object
 692                  * needs to stay alive. Otherwhise hang it on the ghost
 693                  * bo to be unbound and destroyed.
 694                  */
 695
 696                 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
 697                         ghost_obj->ttm = NULL;
 698                 else
 699                         bo->ttm = NULL;
 700
 701                 ttm_bo_unreserve(ghost_obj);
 702                 ttm_bo_unref(&ghost_obj);
 703         }
 704
 705         *old_mem = *new_mem;
 706         new_mem->mm_node = NULL;
 707
 708         return 0;
 709 }
 710 EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);