drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c

   1 /*
   2  * Copyright 2016 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Christian König
  23  */
  24
  25 #include <linux/dma-mapping.h>
  26 #include <drm/ttm/ttm_range_manager.h>
  27
  28 #include "amdgpu.h"
  29 #include "amdgpu_vm.h"
  30 #include "amdgpu_res_cursor.h"
  31 #include "amdgpu_atomfirmware.h"
  32 #include "atom.h"
  33
  34 struct amdgpu_vram_reservation {
  35         u64 start;
  36         u64 size;
  37         struct list_head allocated;
  38         struct list_head blocks;
  39 };
  40
  41 static inline struct amdgpu_vram_mgr *
  42 to_vram_mgr(struct ttm_resource_manager *man)
  43 {
  44         return container_of(man, struct amdgpu_vram_mgr, manager);
  45 }
  46
  47 static inline struct amdgpu_device *
  48 to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
  49 {
  50         return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
  51 }
  52
  53 static inline struct drm_buddy_block *
  54 amdgpu_vram_mgr_first_block(struct list_head *list)
  55 {
  56         return list_first_entry_or_null(list, struct drm_buddy_block, link);
  57 }
  58
  59 static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head)
  60 {
  61         struct drm_buddy_block *block;
  62         u64 start, size;
  63
  64         block = amdgpu_vram_mgr_first_block(head);
  65         if (!block)
  66                 return false;
  67
  68         while (head != block->link.next) {
  69                 start = amdgpu_vram_mgr_block_start(block);
  70                 size = amdgpu_vram_mgr_block_size(block);
  71
  72                 block = list_entry(block->link.next, struct drm_buddy_block, link);
  73                 if (start + size != amdgpu_vram_mgr_block_start(block))
  74                         return false;
  75         }
  76
  77         return true;
  78 }
  79
  80 static inline u64 amdgpu_vram_mgr_blocks_size(struct list_head *head)
  81 {
  82         struct drm_buddy_block *block;
  83         u64 size = 0;
  84
  85         list_for_each_entry(block, head, link)
  86                 size += amdgpu_vram_mgr_block_size(block);
  87
  88         return size;
  89 }
  90
  91 /**
  92  * DOC: mem_info_vram_total
  93  *
  94  * The amdgpu driver provides a sysfs API for reporting current total VRAM
  95  * available on the device
  96  * The file mem_info_vram_total is used for this and returns the total
  97  * amount of VRAM in bytes
  98  */
  99 static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
 100                 struct device_attribute *attr, char *buf)
 101 {
 102         struct drm_device *ddev = dev_get_drvdata(dev);
 103         struct amdgpu_device *adev = drm_to_adev(ddev);
 104
 105         return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
 106 }
 107
 108 /**
 109  * DOC: mem_info_vis_vram_total
 110  *
 111  * The amdgpu driver provides a sysfs API for reporting current total
 112  * visible VRAM available on the device
 113  * The file mem_info_vis_vram_total is used for this and returns the total
 114  * amount of visible VRAM in bytes
 115  */
 116 static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
 117                 struct device_attribute *attr, char *buf)
 118 {
 119         struct drm_device *ddev = dev_get_drvdata(dev);
 120         struct amdgpu_device *adev = drm_to_adev(ddev);
 121
 122         return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
 123 }
 124
 125 /**
 126  * DOC: mem_info_vram_used
 127  *
 128  * The amdgpu driver provides a sysfs API for reporting current total VRAM
 129  * available on the device
 130  * The file mem_info_vram_used is used for this and returns the total
 131  * amount of currently used VRAM in bytes
 132  */
 133 static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
 134                                               struct device_attribute *attr,
 135                                               char *buf)
 136 {
 137         struct drm_device *ddev = dev_get_drvdata(dev);
 138         struct amdgpu_device *adev = drm_to_adev(ddev);
 139         struct ttm_resource_manager *man = &adev->mman.vram_mgr.manager;
 140
 141         return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
 142 }
 143
 144 /**
 145  * DOC: mem_info_vis_vram_used
 146  *
 147  * The amdgpu driver provides a sysfs API for reporting current total of
 148  * used visible VRAM
 149  * The file mem_info_vis_vram_used is used for this and returns the total
 150  * amount of currently used visible VRAM in bytes
 151  */
 152 static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
 153                                                   struct device_attribute *attr,
 154                                                   char *buf)
 155 {
 156         struct drm_device *ddev = dev_get_drvdata(dev);
 157         struct amdgpu_device *adev = drm_to_adev(ddev);
 158
 159         return sysfs_emit(buf, "%llu\n",
 160                           amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr));
 161 }
 162
 163 /**
 164  * DOC: mem_info_vram_vendor
 165  *
 166  * The amdgpu driver provides a sysfs API for reporting the vendor of the
 167  * installed VRAM
 168  * The file mem_info_vram_vendor is used for this and returns the name of the
 169  * vendor.
 170  */
 171 static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
 172                                            struct device_attribute *attr,
 173                                            char *buf)
 174 {
 175         struct drm_device *ddev = dev_get_drvdata(dev);
 176         struct amdgpu_device *adev = drm_to_adev(ddev);
 177
 178         switch (adev->gmc.vram_vendor) {
 179         case SAMSUNG:
 180                 return sysfs_emit(buf, "samsung\n");
 181         case INFINEON:
 182                 return sysfs_emit(buf, "infineon\n");
 183         case ELPIDA:
 184                 return sysfs_emit(buf, "elpida\n");
 185         case ETRON:
 186                 return sysfs_emit(buf, "etron\n");
 187         case NANYA:
 188                 return sysfs_emit(buf, "nanya\n");
 189         case HYNIX:
 190                 return sysfs_emit(buf, "hynix\n");
 191         case MOSEL:
 192                 return sysfs_emit(buf, "mosel\n");
 193         case WINBOND:
 194                 return sysfs_emit(buf, "winbond\n");
 195         case ESMT:
 196                 return sysfs_emit(buf, "esmt\n");
 197         case MICRON:
 198                 return sysfs_emit(buf, "micron\n");
 199         default:
 200                 return sysfs_emit(buf, "unknown\n");
 201         }
 202 }
 203
 204 static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
 205                    amdgpu_mem_info_vram_total_show, NULL);
 206 static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
 207                    amdgpu_mem_info_vis_vram_total_show,NULL);
 208 static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
 209                    amdgpu_mem_info_vram_used_show, NULL);
 210 static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
 211                    amdgpu_mem_info_vis_vram_used_show, NULL);
 212 static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
 213                    amdgpu_mem_info_vram_vendor, NULL);
 214
 215 static struct attribute *amdgpu_vram_mgr_attributes[] = {
 216         &dev_attr_mem_info_vram_total.attr,
 217         &dev_attr_mem_info_vis_vram_total.attr,
 218         &dev_attr_mem_info_vram_used.attr,
 219         &dev_attr_mem_info_vis_vram_used.attr,
 220         &dev_attr_mem_info_vram_vendor.attr,
 221         NULL
 222 };
 223
 224 static umode_t amdgpu_vram_attrs_is_visible(struct kobject *kobj,
 225                                             struct attribute *attr, int i)
 226 {
 227         struct device *dev = kobj_to_dev(kobj);
 228         struct drm_device *ddev = dev_get_drvdata(dev);
 229         struct amdgpu_device *adev = drm_to_adev(ddev);
 230
 231         if (attr == &dev_attr_mem_info_vram_vendor.attr &&
 232             !adev->gmc.vram_vendor)
 233                 return 0;
 234
 235         return attr->mode;
 236 }
 237
 238 const struct attribute_group amdgpu_vram_mgr_attr_group = {
 239         .attrs = amdgpu_vram_mgr_attributes,
 240         .is_visible = amdgpu_vram_attrs_is_visible
 241 };
 242
 243 /**
 244  * amdgpu_vram_mgr_vis_size - Calculate visible block size
 245  *
 246  * @adev: amdgpu_device pointer
 247  * @block: DRM BUDDY block structure
 248  *
 249  * Calculate how many bytes of the DRM BUDDY block are inside visible VRAM
 250  */
 251 static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
 252                                     struct drm_buddy_block *block)
 253 {
 254         u64 start = amdgpu_vram_mgr_block_start(block);
 255         u64 end = start + amdgpu_vram_mgr_block_size(block);
 256
 257         if (start >= adev->gmc.visible_vram_size)
 258                 return 0;
 259
 260         return (end > adev->gmc.visible_vram_size ?
 261                 adev->gmc.visible_vram_size : end) - start;
 262 }
 263
 264 /**
 265  * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
 266  *
 267  * @bo: &amdgpu_bo buffer object (must be in VRAM)
 268  *
 269  * Returns:
 270  * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
 271  */
 272 u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
 273 {
 274         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 275         struct ttm_resource *res = bo->tbo.resource;
 276         struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
 277         struct drm_buddy_block *block;
 278         u64 usage = 0;
 279
 280         if (amdgpu_gmc_vram_full_visible(&adev->gmc))
 281                 return amdgpu_bo_size(bo);
 282
 283         if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
 284                 return 0;
 285
 286         list_for_each_entry(block, &vres->blocks, link)
 287                 usage += amdgpu_vram_mgr_vis_size(adev, block);
 288
 289         return usage;
 290 }
 291
 292 /* Commit the reservation of VRAM pages */
 293 static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
 294 {
 295         struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
 296         struct amdgpu_device *adev = to_amdgpu_device(mgr);
 297         struct drm_buddy *mm = &mgr->mm;
 298         struct amdgpu_vram_reservation *rsv, *temp;
 299         struct drm_buddy_block *block;
 300         uint64_t vis_usage;
 301
 302         list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) {
 303                 if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size,
 304                                            rsv->size, mm->chunk_size, &rsv->allocated,
 305                                            DRM_BUDDY_RANGE_ALLOCATION))
 306                         continue;
 307
 308                 block = amdgpu_vram_mgr_first_block(&rsv->allocated);
 309                 if (!block)
 310                         continue;
 311
 312                 dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
 313                         rsv->start, rsv->size);
 314
 315                 vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
 316                 atomic64_add(vis_usage, &mgr->vis_usage);
 317                 spin_lock(&man->bdev->lru_lock);
 318                 man->usage += rsv->size;
 319                 spin_unlock(&man->bdev->lru_lock);
 320                 list_move(&rsv->blocks, &mgr->reserved_pages);
 321         }
 322 }
 323
 324 /**
 325  * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
 326  *
 327  * @mgr: amdgpu_vram_mgr pointer
 328  * @start: start address of the range in VRAM
 329  * @size: size of the range
 330  *
 331  * Reserve memory from start address with the specified size in VRAM
 332  */
 333 int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
 334                                   uint64_t start, uint64_t size)
 335 {
 336         struct amdgpu_vram_reservation *rsv;
 337
 338         rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
 339         if (!rsv)
 340                 return -ENOMEM;
 341
 342         INIT_LIST_HEAD(&rsv->allocated);
 343         INIT_LIST_HEAD(&rsv->blocks);
 344
 345         rsv->start = start;
 346         rsv->size = size;
 347
 348         mutex_lock(&mgr->lock);
 349         list_add_tail(&rsv->blocks, &mgr->reservations_pending);
 350         amdgpu_vram_mgr_do_reserve(&mgr->manager);
 351         mutex_unlock(&mgr->lock);
 352
 353         return 0;
 354 }
 355
 356 /**
 357  * amdgpu_vram_mgr_query_page_status - query the reservation status
 358  *
 359  * @mgr: amdgpu_vram_mgr pointer
 360  * @start: start address of a page in VRAM
 361  *
 362  * Returns:
 363  *      -EBUSY: the page is still hold and in pending list
 364  *      0: the page has been reserved
 365  *      -ENOENT: the input page is not a reservation
 366  */
 367 int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
 368                                       uint64_t start)
 369 {
 370         struct amdgpu_vram_reservation *rsv;
 371         int ret;
 372
 373         mutex_lock(&mgr->lock);
 374
 375         list_for_each_entry(rsv, &mgr->reservations_pending, blocks) {
 376                 if (rsv->start <= start &&
 377                     (start < (rsv->start + rsv->size))) {
 378                         ret = -EBUSY;
 379                         goto out;
 380                 }
 381         }
 382
 383         list_for_each_entry(rsv, &mgr->reserved_pages, blocks) {
 384                 if (rsv->start <= start &&
 385                     (start < (rsv->start + rsv->size))) {
 386                         ret = 0;
 387                         goto out;
 388                 }
 389         }
 390
 391         ret = -ENOENT;
 392 out:
 393         mutex_unlock(&mgr->lock);
 394         return ret;
 395 }
 396
 397 static void amdgpu_dummy_vram_mgr_debug(struct ttm_resource_manager *man,
 398                                   struct drm_printer *printer)
 399 {
 400         DRM_DEBUG_DRIVER("Dummy vram mgr debug\n");
 401 }
 402
 403 static bool amdgpu_dummy_vram_mgr_compatible(struct ttm_resource_manager *man,
 404                                        struct ttm_resource *res,
 405                                        const struct ttm_place *place,
 406                                        size_t size)
 407 {
 408         DRM_DEBUG_DRIVER("Dummy vram mgr compatible\n");
 409         return false;
 410 }
 411
 412 static bool amdgpu_dummy_vram_mgr_intersects(struct ttm_resource_manager *man,
 413                                        struct ttm_resource *res,
 414                                        const struct ttm_place *place,
 415                                        size_t size)
 416 {
 417         DRM_DEBUG_DRIVER("Dummy vram mgr intersects\n");
 418         return true;
 419 }
 420
 421 static void amdgpu_dummy_vram_mgr_del(struct ttm_resource_manager *man,
 422                                 struct ttm_resource *res)
 423 {
 424         DRM_DEBUG_DRIVER("Dummy vram mgr deleted\n");
 425 }
 426
 427 static int amdgpu_dummy_vram_mgr_new(struct ttm_resource_manager *man,
 428                                struct ttm_buffer_object *tbo,
 429                                const struct ttm_place *place,
 430                                struct ttm_resource **res)
 431 {
 432         DRM_DEBUG_DRIVER("Dummy vram mgr new\n");
 433         return -ENOSPC;
 434 }
 435
 436 /**
 437  * amdgpu_vram_mgr_new - allocate new ranges
 438  *
 439  * @man: TTM memory type manager
 440  * @tbo: TTM BO we need this range for
 441  * @place: placement flags and restrictions
 442  * @res: the resulting mem object
 443  *
 444  * Allocate VRAM for the given BO.
 445  */
 446 static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
 447                                struct ttm_buffer_object *tbo,
 448                                const struct ttm_place *place,
 449                                struct ttm_resource **res)
 450 {
 451         struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
 452         struct amdgpu_device *adev = to_amdgpu_device(mgr);
 453         u64 vis_usage = 0, max_bytes, min_block_size;
 454         struct amdgpu_vram_mgr_resource *vres;
 455         u64 size, remaining_size, lpfn, fpfn;
 456         struct drm_buddy *mm = &mgr->mm;
 457         struct drm_buddy_block *block;
 458         unsigned long pages_per_block;
 459         int r;
 460
 461         lpfn = (u64)place->lpfn << PAGE_SHIFT;
 462         if (!lpfn)
 463                 lpfn = man->size;
 464
 465         fpfn = (u64)place->fpfn << PAGE_SHIFT;
 466
 467         max_bytes = adev->gmc.mc_vram_size;
 468         if (tbo->type != ttm_bo_type_kernel)
 469                 max_bytes -= AMDGPU_VM_RESERVED_VRAM;
 470
 471         if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
 472                 pages_per_block = ~0ul;
 473         } else {
 474 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 475                 pages_per_block = HPAGE_PMD_NR;
 476 #else
 477                 /* default to 2MB */
 478                 pages_per_block = 2UL << (20UL - PAGE_SHIFT);
 479 #endif
 480                 pages_per_block = max_t(uint32_t, pages_per_block,
 481                                         tbo->page_alignment);
 482         }
 483
 484         vres = kzalloc(sizeof(*vres), GFP_KERNEL);
 485         if (!vres)
 486                 return -ENOMEM;
 487
 488         ttm_resource_init(tbo, place, &vres->base);
 489
 490         /* bail out quickly if there's likely not enough VRAM for this BO */
 491         if (ttm_resource_manager_usage(man) > max_bytes) {
 492                 r = -ENOSPC;
 493                 goto error_fini;
 494         }
 495
 496         INIT_LIST_HEAD(&vres->blocks);
 497
 498         if (place->flags & TTM_PL_FLAG_TOPDOWN)
 499                 vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
 500
 501         if (place->flags & TTM_PL_FLAG_CONTIGUOUS)
 502                 vres->flags |= DRM_BUDDY_CONTIGUOUS_ALLOCATION;
 503
 504         if (fpfn || lpfn != mgr->mm.size)
 505                 /* Allocate blocks in desired range */
 506                 vres->flags |= DRM_BUDDY_RANGE_ALLOCATION;
 507
 508         remaining_size = (u64)vres->base.size;
 509
 510         mutex_lock(&mgr->lock);
 511         while (remaining_size) {
 512                 if (tbo->page_alignment)
 513                         min_block_size = (u64)tbo->page_alignment << PAGE_SHIFT;
 514                 else
 515                         min_block_size = mgr->default_page_size;
 516
 517                 BUG_ON(min_block_size < mm->chunk_size);
 518
 519                 /* Limit maximum size to 2GiB due to SG table limitations */
 520                 size = min(remaining_size, 2ULL << 30);
 521
 522                 if ((size >= (u64)pages_per_block << PAGE_SHIFT) &&
 523                                 !(size & (((u64)pages_per_block << PAGE_SHIFT) - 1)))
 524                         min_block_size = (u64)pages_per_block << PAGE_SHIFT;
 525
 526                 r = drm_buddy_alloc_blocks(mm, fpfn,
 527                                            lpfn,
 528                                            size,
 529                                            min_block_size,
 530                                            &vres->blocks,
 531                                            vres->flags);
 532                 if (unlikely(r))
 533                         goto error_free_blocks;
 534
 535                 if (size > remaining_size)
 536                         remaining_size = 0;
 537                 else
 538                         remaining_size -= size;
 539         }
 540         mutex_unlock(&mgr->lock);
 541
 542         vres->base.start = 0;
 543         size = max_t(u64, amdgpu_vram_mgr_blocks_size(&vres->blocks),
 544                      vres->base.size);
 545         list_for_each_entry(block, &vres->blocks, link) {
 546                 unsigned long start;
 547
 548                 start = amdgpu_vram_mgr_block_start(block) +
 549                         amdgpu_vram_mgr_block_size(block);
 550                 start >>= PAGE_SHIFT;
 551
 552                 if (start > PFN_UP(size))
 553                         start -= PFN_UP(size);
 554                 else
 555                         start = 0;
 556                 vres->base.start = max(vres->base.start, start);
 557
 558                 vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
 559         }
 560
 561         if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks))
 562                 vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
 563
 564         if (adev->gmc.xgmi.connected_to_cpu)
 565                 vres->base.bus.caching = ttm_cached;
 566         else
 567                 vres->base.bus.caching = ttm_write_combined;
 568
 569         atomic64_add(vis_usage, &mgr->vis_usage);
 570         *res = &vres->base;
 571         return 0;
 572
 573 error_free_blocks:
 574         drm_buddy_free_list(mm, &vres->blocks);
 575         mutex_unlock(&mgr->lock);
 576 error_fini:
 577         ttm_resource_fini(man, &vres->base);
 578         kfree(vres);
 579
 580         return r;
 581 }
 582
 583 /**
 584  * amdgpu_vram_mgr_del - free ranges
 585  *
 586  * @man: TTM memory type manager
 587  * @res: TTM memory object
 588  *
 589  * Free the allocated VRAM again.
 590  */
 591 static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
 592                                 struct ttm_resource *res)
 593 {
 594         struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
 595         struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
 596         struct amdgpu_device *adev = to_amdgpu_device(mgr);
 597         struct drm_buddy *mm = &mgr->mm;
 598         struct drm_buddy_block *block;
 599         uint64_t vis_usage = 0;
 600
 601         mutex_lock(&mgr->lock);
 602         list_for_each_entry(block, &vres->blocks, link)
 603                 vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
 604
 605         amdgpu_vram_mgr_do_reserve(man);
 606
 607         drm_buddy_free_list(mm, &vres->blocks);
 608         mutex_unlock(&mgr->lock);
 609
 610         atomic64_sub(vis_usage, &mgr->vis_usage);
 611
 612         ttm_resource_fini(man, res);
 613         kfree(vres);
 614 }
 615
 616 /**
 617  * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
 618  *
 619  * @adev: amdgpu device pointer
 620  * @res: TTM memory object
 621  * @offset: byte offset from the base of VRAM BO
 622  * @length: number of bytes to export in sg_table
 623  * @dev: the other device
 624  * @dir: dma direction
 625  * @sgt: resulting sg table
 626  *
 627  * Allocate and fill a sg table from a VRAM allocation.
 628  */
 629 int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
 630                               struct ttm_resource *res,
 631                               u64 offset, u64 length,
 632                               struct device *dev,
 633                               enum dma_data_direction dir,
 634                               struct sg_table **sgt)
 635 {
 636         struct amdgpu_res_cursor cursor;
 637         struct scatterlist *sg;
 638         int num_entries = 0;
 639         int i, r;
 640
 641         *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
 642         if (!*sgt)
 643                 return -ENOMEM;
 644
 645         /* Determine the number of DRM_BUDDY blocks to export */
 646         amdgpu_res_first(res, offset, length, &cursor);
 647         while (cursor.remaining) {
 648                 num_entries++;
 649                 amdgpu_res_next(&cursor, cursor.size);
 650         }
 651
 652         r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
 653         if (r)
 654                 goto error_free;
 655
 656         /* Initialize scatterlist nodes of sg_table */
 657         for_each_sgtable_sg((*sgt), sg, i)
 658                 sg->length = 0;
 659
 660         /*
 661          * Walk down DRM_BUDDY blocks to populate scatterlist nodes
 662          * @note: Use iterator api to get first the DRM_BUDDY block
 663          * and the number of bytes from it. Access the following
 664          * DRM_BUDDY block(s) if more buffer needs to exported
 665          */
 666         amdgpu_res_first(res, offset, length, &cursor);
 667         for_each_sgtable_sg((*sgt), sg, i) {
 668                 phys_addr_t phys = cursor.start + adev->gmc.aper_base;
 669                 size_t size = cursor.size;
 670                 dma_addr_t addr;
 671
 672                 addr = dma_map_resource(dev, phys, size, dir,
 673                                         DMA_ATTR_SKIP_CPU_SYNC);
 674                 r = dma_mapping_error(dev, addr);
 675                 if (r)
 676                         goto error_unmap;
 677
 678                 sg_set_page(sg, NULL, size, 0);
 679                 sg_dma_address(sg) = addr;
 680                 sg_dma_len(sg) = size;
 681
 682                 amdgpu_res_next(&cursor, cursor.size);
 683         }
 684
 685         return 0;
 686
 687 error_unmap:
 688         for_each_sgtable_sg((*sgt), sg, i) {
 689                 if (!sg->length)
 690                         continue;
 691
 692                 dma_unmap_resource(dev, sg->dma_address,
 693                                    sg->length, dir,
 694                                    DMA_ATTR_SKIP_CPU_SYNC);
 695         }
 696         sg_free_table(*sgt);
 697
 698 error_free:
 699         kfree(*sgt);
 700         return r;
 701 }
 702
 703 /**
 704  * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
 705  *
 706  * @dev: device pointer
 707  * @dir: data direction of resource to unmap
 708  * @sgt: sg table to free
 709  *
 710  * Free a previously allocate sg table.
 711  */
 712 void amdgpu_vram_mgr_free_sgt(struct device *dev,
 713                               enum dma_data_direction dir,
 714                               struct sg_table *sgt)
 715 {
 716         struct scatterlist *sg;
 717         int i;
 718
 719         for_each_sgtable_sg(sgt, sg, i)
 720                 dma_unmap_resource(dev, sg->dma_address,
 721                                    sg->length, dir,
 722                                    DMA_ATTR_SKIP_CPU_SYNC);
 723         sg_free_table(sgt);
 724         kfree(sgt);
 725 }
 726
 727 /**
 728  * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
 729  *
 730  * @mgr: amdgpu_vram_mgr pointer
 731  *
 732  * Returns how many bytes are used in the visible part of VRAM
 733  */
 734 uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr)
 735 {
 736         return atomic64_read(&mgr->vis_usage);
 737 }
 738
 739 /**
 740  * amdgpu_vram_mgr_intersects - test each drm buddy block for intersection
 741  *
 742  * @man: TTM memory type manager
 743  * @res: The resource to test
 744  * @place: The place to test against
 745  * @size: Size of the new allocation
 746  *
 747  * Test each drm buddy block for intersection for eviction decision.
 748  */
 749 static bool amdgpu_vram_mgr_intersects(struct ttm_resource_manager *man,
 750                                        struct ttm_resource *res,
 751                                        const struct ttm_place *place,
 752                                        size_t size)
 753 {
 754         struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
 755         struct drm_buddy_block *block;
 756
 757         /* Check each drm buddy block individually */
 758         list_for_each_entry(block, &mgr->blocks, link) {
 759                 unsigned long fpfn =
 760                         amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
 761                 unsigned long lpfn = fpfn +
 762                         (amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
 763
 764                 if (place->fpfn < lpfn &&
 765                     (!place->lpfn || place->lpfn > fpfn))
 766                         return true;
 767         }
 768
 769         return false;
 770 }
 771
 772 /**
 773  * amdgpu_vram_mgr_compatible - test each drm buddy block for compatibility
 774  *
 775  * @man: TTM memory type manager
 776  * @res: The resource to test
 777  * @place: The place to test against
 778  * @size: Size of the new allocation
 779  *
 780  * Test each drm buddy block for placement compatibility.
 781  */
 782 static bool amdgpu_vram_mgr_compatible(struct ttm_resource_manager *man,
 783                                        struct ttm_resource *res,
 784                                        const struct ttm_place *place,
 785                                        size_t size)
 786 {
 787         struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
 788         struct drm_buddy_block *block;
 789
 790         /* Check each drm buddy block individually */
 791         list_for_each_entry(block, &mgr->blocks, link) {
 792                 unsigned long fpfn =
 793                         amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
 794                 unsigned long lpfn = fpfn +
 795                         (amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
 796
 797                 if (fpfn < place->fpfn ||
 798                     (place->lpfn && lpfn > place->lpfn))
 799                         return false;
 800         }
 801
 802         return true;
 803 }
 804
 805 /**
 806  * amdgpu_vram_mgr_debug - dump VRAM table
 807  *
 808  * @man: TTM memory type manager
 809  * @printer: DRM printer to use
 810  *
 811  * Dump the table content using printk.
 812  */
 813 static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
 814                                   struct drm_printer *printer)
 815 {
 816         struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
 817         struct drm_buddy *mm = &mgr->mm;
 818         struct amdgpu_vram_reservation *rsv;
 819
 820         drm_printf(printer, "  vis usage:%llu\n",
 821                    amdgpu_vram_mgr_vis_usage(mgr));
 822
 823         mutex_lock(&mgr->lock);
 824         drm_printf(printer, "default_page_size: %lluKiB\n",
 825                    mgr->default_page_size >> 10);
 826
 827         drm_buddy_print(mm, printer);
 828
 829         drm_printf(printer, "reserved:\n");
 830         list_for_each_entry(rsv, &mgr->reserved_pages, blocks)
 831                 drm_printf(printer, "%#018llx-%#018llx: %llu\n",
 832                         rsv->start, rsv->start + rsv->size, rsv->size);
 833         mutex_unlock(&mgr->lock);
 834 }
 835
 836 static const struct ttm_resource_manager_func amdgpu_dummy_vram_mgr_func = {
 837         .alloc  = amdgpu_dummy_vram_mgr_new,
 838         .free   = amdgpu_dummy_vram_mgr_del,
 839         .intersects = amdgpu_dummy_vram_mgr_intersects,
 840         .compatible = amdgpu_dummy_vram_mgr_compatible,
 841         .debug  = amdgpu_dummy_vram_mgr_debug
 842 };
 843
 844 static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
 845         .alloc  = amdgpu_vram_mgr_new,
 846         .free   = amdgpu_vram_mgr_del,
 847         .intersects = amdgpu_vram_mgr_intersects,
 848         .compatible = amdgpu_vram_mgr_compatible,
 849         .debug  = amdgpu_vram_mgr_debug
 850 };
 851
 852 /**
 853  * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
 854  *
 855  * @adev: amdgpu_device pointer
 856  *
 857  * Allocate and initialize the VRAM manager.
 858  */
 859 int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
 860 {
 861         struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
 862         struct ttm_resource_manager *man = &mgr->manager;
 863         int err;
 864
 865         ttm_resource_manager_init(man, &adev->mman.bdev,
 866                                   adev->gmc.real_vram_size);
 867
 868         mutex_init(&mgr->lock);
 869         INIT_LIST_HEAD(&mgr->reservations_pending);
 870         INIT_LIST_HEAD(&mgr->reserved_pages);
 871         mgr->default_page_size = PAGE_SIZE;
 872
 873         if (!adev->gmc.is_app_apu) {
 874                 man->func = &amdgpu_vram_mgr_func;
 875
 876                 err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
 877                 if (err)
 878                         return err;
 879         } else {
 880                 man->func = &amdgpu_dummy_vram_mgr_func;
 881                 DRM_INFO("Setup dummy vram mgr\n");
 882         }
 883
 884         ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
 885         ttm_resource_manager_set_used(man, true);
 886         return 0;
 887 }
 888
 889 /**
 890  * amdgpu_vram_mgr_fini - free and destroy VRAM manager
 891  *
 892  * @adev: amdgpu_device pointer
 893  *
 894  * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
 895  * allocated inside it.
 896  */
 897 void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
 898 {
 899         struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
 900         struct ttm_resource_manager *man = &mgr->manager;
 901         int ret;
 902         struct amdgpu_vram_reservation *rsv, *temp;
 903
 904         ttm_resource_manager_set_used(man, false);
 905
 906         ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
 907         if (ret)
 908                 return;
 909
 910         mutex_lock(&mgr->lock);
 911         list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks)
 912                 kfree(rsv);
 913
 914         list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) {
 915                 drm_buddy_free_list(&mgr->mm, &rsv->allocated);
 916                 kfree(rsv);
 917         }
 918         if (!adev->gmc.is_app_apu)
 919                 drm_buddy_fini(&mgr->mm);
 920         mutex_unlock(&mgr->lock);
 921
 922         ttm_resource_manager_cleanup(man);
 923         ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
 924 }