1 /* 2 * Copyright 2009 Jerome Glisse. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 19 * USE OR OTHER DEALINGS IN THE SOFTWARE. 20 * 21 * The above copyright notice and this permission notice (including the 22 * next paragraph) shall be included in all copies or substantial portions 23 * of the Software. 24 * 25 */ 26 /* 27 * Authors: 28 * Jerome Glisse <glisse@freedesktop.org> 29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> 30 * Dave Airlie 31 */ 32 #include <linux/list.h> 33 #include <linux/slab.h> 34 #include <linux/dma-buf.h> 35 36 #include <drm/amdgpu_drm.h> 37 #include <drm/drm_cache.h> 38 #include "amdgpu.h" 39 #include "amdgpu_trace.h" 40 #include "amdgpu_amdkfd.h" 41 42 /** 43 * DOC: amdgpu_object 44 * 45 * This defines the interfaces to operate on an &amdgpu_bo buffer object which 46 * represents memory used by driver (VRAM, system memory, etc.). The driver 47 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces 48 * to create/destroy/set buffer object which are then managed by the kernel TTM 49 * memory manager. 50 * The interfaces are also used internally by kernel clients, including gfx, 51 * uvd, etc. for kernel managed allocations used by the GPU. 52 * 53 */ 54 55 /** 56 * amdgpu_bo_subtract_pin_size - Remove BO from pin_size accounting 57 * 58 * @bo: &amdgpu_bo buffer object 59 * 60 * This function is called when a BO stops being pinned, and updates the 61 * &amdgpu_device pin_size values accordingly. 62 */ 63 static void amdgpu_bo_subtract_pin_size(struct amdgpu_bo *bo) 64 { 65 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 66 67 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) { 68 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size); 69 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo), 70 &adev->visible_pin_size); 71 } else if (bo->tbo.mem.mem_type == TTM_PL_TT) { 72 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size); 73 } 74 } 75 76 static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo) 77 { 78 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev); 79 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo); 80 81 if (bo->pin_count > 0) 82 amdgpu_bo_subtract_pin_size(bo); 83 84 amdgpu_bo_kunmap(bo); 85 86 if (bo->tbo.base.import_attach) 87 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg); 88 drm_gem_object_release(&bo->tbo.base); 89 /* in case amdgpu_device_recover_vram got NULL of bo->parent */ 90 if (!list_empty(&bo->shadow_list)) { 91 mutex_lock(&adev->shadow_list_lock); 92 list_del_init(&bo->shadow_list); 93 mutex_unlock(&adev->shadow_list_lock); 94 } 95 amdgpu_bo_unref(&bo->parent); 96 97 kfree(bo->metadata); 98 kfree(bo); 99 } 100 101 /** 102 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo 103 * @bo: buffer object to be checked 104 * 105 * Uses destroy function associated with the object to determine if this is 106 * an &amdgpu_bo. 107 * 108 * Returns: 109 * true if the object belongs to &amdgpu_bo, false if not. 110 */ 111 bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo) 112 { 113 if (bo->destroy == &amdgpu_bo_destroy) 114 return true; 115 return false; 116 } 117 118 /** 119 * amdgpu_bo_placement_from_domain - set buffer's placement 120 * @abo: &amdgpu_bo buffer object whose placement is to be set 121 * @domain: requested domain 122 * 123 * Sets buffer's placement according to requested domain and the buffer's 124 * flags. 125 */ 126 void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain) 127 { 128 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev); 129 struct ttm_placement *placement = &abo->placement; 130 struct ttm_place *places = abo->placements; 131 u64 flags = abo->flags; 132 u32 c = 0; 133 134 if (domain & AMDGPU_GEM_DOMAIN_VRAM) { 135 unsigned visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT; 136 137 places[c].fpfn = 0; 138 places[c].lpfn = 0; 139 places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | 140 TTM_PL_FLAG_VRAM; 141 142 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) 143 places[c].lpfn = visible_pfn; 144 else 145 places[c].flags |= TTM_PL_FLAG_TOPDOWN; 146 147 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) 148 places[c].flags |= TTM_PL_FLAG_CONTIGUOUS; 149 c++; 150 } 151 152 if (domain & AMDGPU_GEM_DOMAIN_GTT) { 153 places[c].fpfn = 0; 154 places[c].lpfn = 0; 155 places[c].flags = TTM_PL_FLAG_TT; 156 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) 157 places[c].flags |= TTM_PL_FLAG_WC | 158 TTM_PL_FLAG_UNCACHED; 159 else 160 places[c].flags |= TTM_PL_FLAG_CACHED; 161 c++; 162 } 163 164 if (domain & AMDGPU_GEM_DOMAIN_CPU) { 165 places[c].fpfn = 0; 166 places[c].lpfn = 0; 167 places[c].flags = TTM_PL_FLAG_SYSTEM; 168 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) 169 places[c].flags |= TTM_PL_FLAG_WC | 170 TTM_PL_FLAG_UNCACHED; 171 else 172 places[c].flags |= TTM_PL_FLAG_CACHED; 173 c++; 174 } 175 176 if (domain & AMDGPU_GEM_DOMAIN_GDS) { 177 places[c].fpfn = 0; 178 places[c].lpfn = 0; 179 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GDS; 180 c++; 181 } 182 183 if (domain & AMDGPU_GEM_DOMAIN_GWS) { 184 places[c].fpfn = 0; 185 places[c].lpfn = 0; 186 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GWS; 187 c++; 188 } 189 190 if (domain & AMDGPU_GEM_DOMAIN_OA) { 191 places[c].fpfn = 0; 192 places[c].lpfn = 0; 193 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_OA; 194 c++; 195 } 196 197 if (!c) { 198 places[c].fpfn = 0; 199 places[c].lpfn = 0; 200 places[c].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; 201 c++; 202 } 203 204 BUG_ON(c >= AMDGPU_BO_MAX_PLACEMENTS); 205 206 placement->num_placement = c; 207 placement->placement = places; 208 209 placement->num_busy_placement = c; 210 placement->busy_placement = places; 211 } 212 213 /** 214 * amdgpu_bo_create_reserved - create reserved BO for kernel use 215 * 216 * @adev: amdgpu device object 217 * @size: size for the new BO 218 * @align: alignment for the new BO 219 * @domain: where to place it 220 * @bo_ptr: used to initialize BOs in structures 221 * @gpu_addr: GPU addr of the pinned BO 222 * @cpu_addr: optional CPU address mapping 223 * 224 * Allocates and pins a BO for kernel internal use, and returns it still 225 * reserved. 226 * 227 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL. 228 * 229 * Returns: 230 * 0 on success, negative error code otherwise. 231 */ 232 int amdgpu_bo_create_reserved(struct amdgpu_device *adev, 233 unsigned long size, int align, 234 u32 domain, struct amdgpu_bo **bo_ptr, 235 u64 *gpu_addr, void **cpu_addr) 236 { 237 struct amdgpu_bo_param bp; 238 bool free = false; 239 int r; 240 241 if (!size) { 242 amdgpu_bo_unref(bo_ptr); 243 return 0; 244 } 245 246 memset(&bp, 0, sizeof(bp)); 247 bp.size = size; 248 bp.byte_align = align; 249 bp.domain = domain; 250 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED 251 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS; 252 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS; 253 bp.type = ttm_bo_type_kernel; 254 bp.resv = NULL; 255 256 if (!*bo_ptr) { 257 r = amdgpu_bo_create(adev, &bp, bo_ptr); 258 if (r) { 259 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n", 260 r); 261 return r; 262 } 263 free = true; 264 } 265 266 r = amdgpu_bo_reserve(*bo_ptr, false); 267 if (r) { 268 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r); 269 goto error_free; 270 } 271 272 r = amdgpu_bo_pin(*bo_ptr, domain); 273 if (r) { 274 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r); 275 goto error_unreserve; 276 } 277 278 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo); 279 if (r) { 280 dev_err(adev->dev, "%p bind failed\n", *bo_ptr); 281 goto error_unpin; 282 } 283 284 if (gpu_addr) 285 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr); 286 287 if (cpu_addr) { 288 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr); 289 if (r) { 290 dev_err(adev->dev, "(%d) kernel bo map failed\n", r); 291 goto error_unpin; 292 } 293 } 294 295 return 0; 296 297 error_unpin: 298 amdgpu_bo_unpin(*bo_ptr); 299 error_unreserve: 300 amdgpu_bo_unreserve(*bo_ptr); 301 302 error_free: 303 if (free) 304 amdgpu_bo_unref(bo_ptr); 305 306 return r; 307 } 308 309 /** 310 * amdgpu_bo_create_kernel - create BO for kernel use 311 * 312 * @adev: amdgpu device object 313 * @size: size for the new BO 314 * @align: alignment for the new BO 315 * @domain: where to place it 316 * @bo_ptr: used to initialize BOs in structures 317 * @gpu_addr: GPU addr of the pinned BO 318 * @cpu_addr: optional CPU address mapping 319 * 320 * Allocates and pins a BO for kernel internal use. 321 * 322 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL. 323 * 324 * Returns: 325 * 0 on success, negative error code otherwise. 326 */ 327 int amdgpu_bo_create_kernel(struct amdgpu_device *adev, 328 unsigned long size, int align, 329 u32 domain, struct amdgpu_bo **bo_ptr, 330 u64 *gpu_addr, void **cpu_addr) 331 { 332 int r; 333 334 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr, 335 gpu_addr, cpu_addr); 336 337 if (r) 338 return r; 339 340 if (*bo_ptr) 341 amdgpu_bo_unreserve(*bo_ptr); 342 343 return 0; 344 } 345 346 /** 347 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location 348 * 349 * @adev: amdgpu device object 350 * @offset: offset of the BO 351 * @size: size of the BO 352 * @domain: where to place it 353 * @bo_ptr: used to initialize BOs in structures 354 * @cpu_addr: optional CPU address mapping 355 * 356 * Creates a kernel BO at a specific offset in the address space of the domain. 357 * 358 * Returns: 359 * 0 on success, negative error code otherwise. 360 */ 361 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev, 362 uint64_t offset, uint64_t size, uint32_t domain, 363 struct amdgpu_bo **bo_ptr, void **cpu_addr) 364 { 365 struct ttm_operation_ctx ctx = { false, false }; 366 unsigned int i; 367 int r; 368 369 offset &= PAGE_MASK; 370 size = ALIGN(size, PAGE_SIZE); 371 372 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE, domain, bo_ptr, 373 NULL, cpu_addr); 374 if (r) 375 return r; 376 377 /* 378 * Remove the original mem node and create a new one at the request 379 * position. 380 */ 381 if (cpu_addr) 382 amdgpu_bo_kunmap(*bo_ptr); 383 384 ttm_bo_mem_put(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.mem); 385 386 for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) { 387 (*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT; 388 (*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT; 389 } 390 r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement, 391 &(*bo_ptr)->tbo.mem, &ctx); 392 if (r) 393 goto error; 394 395 if (cpu_addr) { 396 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr); 397 if (r) 398 goto error; 399 } 400 401 amdgpu_bo_unreserve(*bo_ptr); 402 return 0; 403 404 error: 405 amdgpu_bo_unreserve(*bo_ptr); 406 amdgpu_bo_unref(bo_ptr); 407 return r; 408 } 409 410 /** 411 * amdgpu_bo_free_kernel - free BO for kernel use 412 * 413 * @bo: amdgpu BO to free 414 * @gpu_addr: pointer to where the BO's GPU memory space address was stored 415 * @cpu_addr: pointer to where the BO's CPU memory space address was stored 416 * 417 * unmaps and unpin a BO for kernel internal use. 418 */ 419 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr, 420 void **cpu_addr) 421 { 422 if (*bo == NULL) 423 return; 424 425 if (likely(amdgpu_bo_reserve(*bo, true) == 0)) { 426 if (cpu_addr) 427 amdgpu_bo_kunmap(*bo); 428 429 amdgpu_bo_unpin(*bo); 430 amdgpu_bo_unreserve(*bo); 431 } 432 amdgpu_bo_unref(bo); 433 434 if (gpu_addr) 435 *gpu_addr = 0; 436 437 if (cpu_addr) 438 *cpu_addr = NULL; 439 } 440 441 /* Validate bo size is bit bigger then the request domain */ 442 static bool amdgpu_bo_validate_size(struct amdgpu_device *adev, 443 unsigned long size, u32 domain) 444 { 445 struct ttm_mem_type_manager *man = NULL; 446 447 /* 448 * If GTT is part of requested domains the check must succeed to 449 * allow fall back to GTT 450 */ 451 if (domain & AMDGPU_GEM_DOMAIN_GTT) { 452 man = &adev->mman.bdev.man[TTM_PL_TT]; 453 454 if (size < (man->size << PAGE_SHIFT)) 455 return true; 456 else 457 goto fail; 458 } 459 460 if (domain & AMDGPU_GEM_DOMAIN_VRAM) { 461 man = &adev->mman.bdev.man[TTM_PL_VRAM]; 462 463 if (size < (man->size << PAGE_SHIFT)) 464 return true; 465 else 466 goto fail; 467 } 468 469 470 /* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU */ 471 return true; 472 473 fail: 474 DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size, 475 man->size << PAGE_SHIFT); 476 return false; 477 } 478 479 bool amdgpu_bo_support_uswc(u64 bo_flags) 480 { 481 482 #ifdef CONFIG_X86_32 483 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit 484 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627 485 */ 486 return false; 487 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT) 488 /* Don't try to enable write-combining when it can't work, or things 489 * may be slow 490 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758 491 */ 492 493 #ifndef CONFIG_COMPILE_TEST 494 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \ 495 thanks to write-combining 496 #endif 497 498 if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) 499 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for " 500 "better performance thanks to write-combining\n"); 501 return false; 502 #else 503 /* For architectures that don't support WC memory, 504 * mask out the WC flag from the BO 505 */ 506 if (!drm_arch_can_wc_memory()) 507 return false; 508 509 return true; 510 #endif 511 } 512 513 static int amdgpu_bo_do_create(struct amdgpu_device *adev, 514 struct amdgpu_bo_param *bp, 515 struct amdgpu_bo **bo_ptr) 516 { 517 struct ttm_operation_ctx ctx = { 518 .interruptible = (bp->type != ttm_bo_type_kernel), 519 .no_wait_gpu = bp->no_wait_gpu, 520 .resv = bp->resv, 521 .flags = bp->type != ttm_bo_type_kernel ? 522 TTM_OPT_FLAG_ALLOW_RES_EVICT : 0 523 }; 524 struct amdgpu_bo *bo; 525 unsigned long page_align, size = bp->size; 526 size_t acc_size; 527 int r; 528 529 /* Note that GDS/GWS/OA allocates 1 page per byte/resource. */ 530 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) { 531 /* GWS and OA don't need any alignment. */ 532 page_align = bp->byte_align; 533 size <<= PAGE_SHIFT; 534 } else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) { 535 /* Both size and alignment must be a multiple of 4. */ 536 page_align = ALIGN(bp->byte_align, 4); 537 size = ALIGN(size, 4) << PAGE_SHIFT; 538 } else { 539 /* Memory should be aligned at least to a page size. */ 540 page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT; 541 size = ALIGN(size, PAGE_SIZE); 542 } 543 544 if (!amdgpu_bo_validate_size(adev, size, bp->domain)) 545 return -ENOMEM; 546 547 *bo_ptr = NULL; 548 549 acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size, 550 sizeof(struct amdgpu_bo)); 551 552 bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL); 553 if (bo == NULL) 554 return -ENOMEM; 555 drm_gem_private_object_init(adev->ddev, &bo->tbo.base, size); 556 INIT_LIST_HEAD(&bo->shadow_list); 557 bo->vm_bo = NULL; 558 bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain : 559 bp->domain; 560 bo->allowed_domains = bo->preferred_domains; 561 if (bp->type != ttm_bo_type_kernel && 562 bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM) 563 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT; 564 565 bo->flags = bp->flags; 566 567 if (!amdgpu_bo_support_uswc(bo->flags)) 568 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC; 569 570 bo->tbo.bdev = &adev->mman.bdev; 571 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA | 572 AMDGPU_GEM_DOMAIN_GDS)) 573 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU); 574 else 575 amdgpu_bo_placement_from_domain(bo, bp->domain); 576 if (bp->type == ttm_bo_type_kernel) 577 bo->tbo.priority = 1; 578 579 r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, bp->type, 580 &bo->placement, page_align, &ctx, acc_size, 581 NULL, bp->resv, &amdgpu_bo_destroy); 582 if (unlikely(r != 0)) 583 return r; 584 585 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) && 586 bo->tbo.mem.mem_type == TTM_PL_VRAM && 587 bo->tbo.mem.start < adev->gmc.visible_vram_size >> PAGE_SHIFT) 588 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 589 ctx.bytes_moved); 590 else 591 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0); 592 593 if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED && 594 bo->tbo.mem.placement & TTM_PL_FLAG_VRAM) { 595 struct dma_fence *fence; 596 597 r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence); 598 if (unlikely(r)) 599 goto fail_unreserve; 600 601 amdgpu_bo_fence(bo, fence, false); 602 dma_fence_put(bo->tbo.moving); 603 bo->tbo.moving = dma_fence_get(fence); 604 dma_fence_put(fence); 605 } 606 if (!bp->resv) 607 amdgpu_bo_unreserve(bo); 608 *bo_ptr = bo; 609 610 trace_amdgpu_bo_create(bo); 611 612 /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */ 613 if (bp->type == ttm_bo_type_device) 614 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 615 616 return 0; 617 618 fail_unreserve: 619 if (!bp->resv) 620 dma_resv_unlock(bo->tbo.base.resv); 621 amdgpu_bo_unref(&bo); 622 return r; 623 } 624 625 static int amdgpu_bo_create_shadow(struct amdgpu_device *adev, 626 unsigned long size, 627 struct amdgpu_bo *bo) 628 { 629 struct amdgpu_bo_param bp; 630 int r; 631 632 if (bo->shadow) 633 return 0; 634 635 memset(&bp, 0, sizeof(bp)); 636 bp.size = size; 637 bp.domain = AMDGPU_GEM_DOMAIN_GTT; 638 bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC | 639 AMDGPU_GEM_CREATE_SHADOW; 640 bp.type = ttm_bo_type_kernel; 641 bp.resv = bo->tbo.base.resv; 642 643 r = amdgpu_bo_do_create(adev, &bp, &bo->shadow); 644 if (!r) { 645 bo->shadow->parent = amdgpu_bo_ref(bo); 646 mutex_lock(&adev->shadow_list_lock); 647 list_add_tail(&bo->shadow->shadow_list, &adev->shadow_list); 648 mutex_unlock(&adev->shadow_list_lock); 649 } 650 651 return r; 652 } 653 654 /** 655 * amdgpu_bo_create - create an &amdgpu_bo buffer object 656 * @adev: amdgpu device object 657 * @bp: parameters to be used for the buffer object 658 * @bo_ptr: pointer to the buffer object pointer 659 * 660 * Creates an &amdgpu_bo buffer object; and if requested, also creates a 661 * shadow object. 662 * Shadow object is used to backup the original buffer object, and is always 663 * in GTT. 664 * 665 * Returns: 666 * 0 for success or a negative error code on failure. 667 */ 668 int amdgpu_bo_create(struct amdgpu_device *adev, 669 struct amdgpu_bo_param *bp, 670 struct amdgpu_bo **bo_ptr) 671 { 672 u64 flags = bp->flags; 673 int r; 674 675 bp->flags = bp->flags & ~AMDGPU_GEM_CREATE_SHADOW; 676 r = amdgpu_bo_do_create(adev, bp, bo_ptr); 677 if (r) 678 return r; 679 680 if ((flags & AMDGPU_GEM_CREATE_SHADOW) && !(adev->flags & AMD_IS_APU)) { 681 if (!bp->resv) 682 WARN_ON(dma_resv_lock((*bo_ptr)->tbo.base.resv, 683 NULL)); 684 685 r = amdgpu_bo_create_shadow(adev, bp->size, *bo_ptr); 686 687 if (!bp->resv) 688 dma_resv_unlock((*bo_ptr)->tbo.base.resv); 689 690 if (r) 691 amdgpu_bo_unref(bo_ptr); 692 } 693 694 return r; 695 } 696 697 /** 698 * amdgpu_bo_validate - validate an &amdgpu_bo buffer object 699 * @bo: pointer to the buffer object 700 * 701 * Sets placement according to domain; and changes placement and caching 702 * policy of the buffer object according to the placement. 703 * This is used for validating shadow bos. It calls ttm_bo_validate() to 704 * make sure the buffer is resident where it needs to be. 705 * 706 * Returns: 707 * 0 for success or a negative error code on failure. 708 */ 709 int amdgpu_bo_validate(struct amdgpu_bo *bo) 710 { 711 struct ttm_operation_ctx ctx = { false, false }; 712 uint32_t domain; 713 int r; 714 715 if (bo->pin_count) 716 return 0; 717 718 domain = bo->preferred_domains; 719 720 retry: 721 amdgpu_bo_placement_from_domain(bo, domain); 722 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 723 if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) { 724 domain = bo->allowed_domains; 725 goto retry; 726 } 727 728 return r; 729 } 730 731 /** 732 * amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow 733 * 734 * @shadow: &amdgpu_bo shadow to be restored 735 * @fence: dma_fence associated with the operation 736 * 737 * Copies a buffer object's shadow content back to the object. 738 * This is used for recovering a buffer from its shadow in case of a gpu 739 * reset where vram context may be lost. 740 * 741 * Returns: 742 * 0 for success or a negative error code on failure. 743 */ 744 int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence) 745 746 { 747 struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev); 748 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; 749 uint64_t shadow_addr, parent_addr; 750 751 shadow_addr = amdgpu_bo_gpu_offset(shadow); 752 parent_addr = amdgpu_bo_gpu_offset(shadow->parent); 753 754 return amdgpu_copy_buffer(ring, shadow_addr, parent_addr, 755 amdgpu_bo_size(shadow), NULL, fence, 756 true, false); 757 } 758 759 /** 760 * amdgpu_bo_kmap - map an &amdgpu_bo buffer object 761 * @bo: &amdgpu_bo buffer object to be mapped 762 * @ptr: kernel virtual address to be returned 763 * 764 * Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls 765 * amdgpu_bo_kptr() to get the kernel virtual address. 766 * 767 * Returns: 768 * 0 for success or a negative error code on failure. 769 */ 770 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr) 771 { 772 void *kptr; 773 long r; 774 775 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) 776 return -EPERM; 777 778 kptr = amdgpu_bo_kptr(bo); 779 if (kptr) { 780 if (ptr) 781 *ptr = kptr; 782 return 0; 783 } 784 785 r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv, false, false, 786 MAX_SCHEDULE_TIMEOUT); 787 if (r < 0) 788 return r; 789 790 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap); 791 if (r) 792 return r; 793 794 if (ptr) 795 *ptr = amdgpu_bo_kptr(bo); 796 797 return 0; 798 } 799 800 /** 801 * amdgpu_bo_kptr - returns a kernel virtual address of the buffer object 802 * @bo: &amdgpu_bo buffer object 803 * 804 * Calls ttm_kmap_obj_virtual() to get the kernel virtual address 805 * 806 * Returns: 807 * the virtual address of a buffer object area. 808 */ 809 void *amdgpu_bo_kptr(struct amdgpu_bo *bo) 810 { 811 bool is_iomem; 812 813 return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); 814 } 815 816 /** 817 * amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object 818 * @bo: &amdgpu_bo buffer object to be unmapped 819 * 820 * Unmaps a kernel map set up by amdgpu_bo_kmap(). 821 */ 822 void amdgpu_bo_kunmap(struct amdgpu_bo *bo) 823 { 824 if (bo->kmap.bo) 825 ttm_bo_kunmap(&bo->kmap); 826 } 827 828 /** 829 * amdgpu_bo_ref - reference an &amdgpu_bo buffer object 830 * @bo: &amdgpu_bo buffer object 831 * 832 * References the contained &ttm_buffer_object. 833 * 834 * Returns: 835 * a refcounted pointer to the &amdgpu_bo buffer object. 836 */ 837 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo) 838 { 839 if (bo == NULL) 840 return NULL; 841 842 ttm_bo_get(&bo->tbo); 843 return bo; 844 } 845 846 /** 847 * amdgpu_bo_unref - unreference an &amdgpu_bo buffer object 848 * @bo: &amdgpu_bo buffer object 849 * 850 * Unreferences the contained &ttm_buffer_object and clear the pointer 851 */ 852 void amdgpu_bo_unref(struct amdgpu_bo **bo) 853 { 854 struct ttm_buffer_object *tbo; 855 856 if ((*bo) == NULL) 857 return; 858 859 tbo = &((*bo)->tbo); 860 ttm_bo_put(tbo); 861 *bo = NULL; 862 } 863 864 /** 865 * amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object 866 * @bo: &amdgpu_bo buffer object to be pinned 867 * @domain: domain to be pinned to 868 * @min_offset: the start of requested address range 869 * @max_offset: the end of requested address range 870 * 871 * Pins the buffer object according to requested domain and address range. If 872 * the memory is unbound gart memory, binds the pages into gart table. Adjusts 873 * pin_count and pin_size accordingly. 874 * 875 * Pinning means to lock pages in memory along with keeping them at a fixed 876 * offset. It is required when a buffer can not be moved, for example, when 877 * a display buffer is being scanned out. 878 * 879 * Compared with amdgpu_bo_pin(), this function gives more flexibility on 880 * where to pin a buffer if there are specific restrictions on where a buffer 881 * must be located. 882 * 883 * Returns: 884 * 0 for success or a negative error code on failure. 885 */ 886 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain, 887 u64 min_offset, u64 max_offset) 888 { 889 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 890 struct ttm_operation_ctx ctx = { false, false }; 891 int r, i; 892 893 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm)) 894 return -EPERM; 895 896 if (WARN_ON_ONCE(min_offset > max_offset)) 897 return -EINVAL; 898 899 /* A shared bo cannot be migrated to VRAM */ 900 if (bo->prime_shared_count) { 901 if (domain & AMDGPU_GEM_DOMAIN_GTT) 902 domain = AMDGPU_GEM_DOMAIN_GTT; 903 else 904 return -EINVAL; 905 } 906 907 /* This assumes only APU display buffers are pinned with (VRAM|GTT). 908 * See function amdgpu_display_supported_domains() 909 */ 910 domain = amdgpu_bo_get_preferred_pin_domain(adev, domain); 911 912 if (bo->pin_count) { 913 uint32_t mem_type = bo->tbo.mem.mem_type; 914 915 if (!(domain & amdgpu_mem_type_to_domain(mem_type))) 916 return -EINVAL; 917 918 bo->pin_count++; 919 920 if (max_offset != 0) { 921 u64 domain_start = bo->tbo.bdev->man[mem_type].gpu_offset; 922 WARN_ON_ONCE(max_offset < 923 (amdgpu_bo_gpu_offset(bo) - domain_start)); 924 } 925 926 return 0; 927 } 928 929 if (bo->tbo.base.import_attach) 930 dma_buf_pin(bo->tbo.base.import_attach); 931 932 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS; 933 /* force to pin into visible video ram */ 934 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) 935 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 936 amdgpu_bo_placement_from_domain(bo, domain); 937 for (i = 0; i < bo->placement.num_placement; i++) { 938 unsigned fpfn, lpfn; 939 940 fpfn = min_offset >> PAGE_SHIFT; 941 lpfn = max_offset >> PAGE_SHIFT; 942 943 if (fpfn > bo->placements[i].fpfn) 944 bo->placements[i].fpfn = fpfn; 945 if (!bo->placements[i].lpfn || 946 (lpfn && lpfn < bo->placements[i].lpfn)) 947 bo->placements[i].lpfn = lpfn; 948 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; 949 } 950 951 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 952 if (unlikely(r)) { 953 dev_err(adev->dev, "%p pin failed\n", bo); 954 goto error; 955 } 956 957 bo->pin_count = 1; 958 959 domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type); 960 if (domain == AMDGPU_GEM_DOMAIN_VRAM) { 961 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size); 962 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo), 963 &adev->visible_pin_size); 964 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) { 965 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size); 966 } 967 968 error: 969 return r; 970 } 971 972 /** 973 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object 974 * @bo: &amdgpu_bo buffer object to be pinned 975 * @domain: domain to be pinned to 976 * 977 * A simple wrapper to amdgpu_bo_pin_restricted(). 978 * Provides a simpler API for buffers that do not have any strict restrictions 979 * on where a buffer must be located. 980 * 981 * Returns: 982 * 0 for success or a negative error code on failure. 983 */ 984 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain) 985 { 986 return amdgpu_bo_pin_restricted(bo, domain, 0, 0); 987 } 988 989 /** 990 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object 991 * @bo: &amdgpu_bo buffer object to be unpinned 992 * 993 * Decreases the pin_count, and clears the flags if pin_count reaches 0. 994 * Changes placement and pin size accordingly. 995 * 996 * Returns: 997 * 0 for success or a negative error code on failure. 998 */ 999 int amdgpu_bo_unpin(struct amdgpu_bo *bo) 1000 { 1001 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1002 struct ttm_operation_ctx ctx = { false, false }; 1003 int r, i; 1004 1005 if (WARN_ON_ONCE(!bo->pin_count)) { 1006 dev_warn(adev->dev, "%p unpin not necessary\n", bo); 1007 return 0; 1008 } 1009 bo->pin_count--; 1010 if (bo->pin_count) 1011 return 0; 1012 1013 amdgpu_bo_subtract_pin_size(bo); 1014 1015 if (bo->tbo.base.import_attach) 1016 dma_buf_unpin(bo->tbo.base.import_attach); 1017 1018 for (i = 0; i < bo->placement.num_placement; i++) { 1019 bo->placements[i].lpfn = 0; 1020 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; 1021 } 1022 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 1023 if (unlikely(r)) 1024 dev_err(adev->dev, "%p validate failed for unpin\n", bo); 1025 1026 return r; 1027 } 1028 1029 /** 1030 * amdgpu_bo_evict_vram - evict VRAM buffers 1031 * @adev: amdgpu device object 1032 * 1033 * Evicts all VRAM buffers on the lru list of the memory type. 1034 * Mainly used for evicting vram at suspend time. 1035 * 1036 * Returns: 1037 * 0 for success or a negative error code on failure. 1038 */ 1039 int amdgpu_bo_evict_vram(struct amdgpu_device *adev) 1040 { 1041 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */ 1042 #ifndef CONFIG_HIBERNATION 1043 if (adev->flags & AMD_IS_APU) { 1044 /* Useless to evict on IGP chips */ 1045 return 0; 1046 } 1047 #endif 1048 return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM); 1049 } 1050 1051 static const char *amdgpu_vram_names[] = { 1052 "UNKNOWN", 1053 "GDDR1", 1054 "DDR2", 1055 "GDDR3", 1056 "GDDR4", 1057 "GDDR5", 1058 "HBM", 1059 "DDR3", 1060 "DDR4", 1061 "GDDR6", 1062 }; 1063 1064 /** 1065 * amdgpu_bo_init - initialize memory manager 1066 * @adev: amdgpu device object 1067 * 1068 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager. 1069 * 1070 * Returns: 1071 * 0 for success or a negative error code on failure. 1072 */ 1073 int amdgpu_bo_init(struct amdgpu_device *adev) 1074 { 1075 /* reserve PAT memory space to WC for VRAM */ 1076 arch_io_reserve_memtype_wc(adev->gmc.aper_base, 1077 adev->gmc.aper_size); 1078 1079 /* Add an MTRR for the VRAM */ 1080 adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base, 1081 adev->gmc.aper_size); 1082 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n", 1083 adev->gmc.mc_vram_size >> 20, 1084 (unsigned long long)adev->gmc.aper_size >> 20); 1085 DRM_INFO("RAM width %dbits %s\n", 1086 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]); 1087 return amdgpu_ttm_init(adev); 1088 } 1089 1090 /** 1091 * amdgpu_bo_late_init - late init 1092 * @adev: amdgpu device object 1093 * 1094 * Calls amdgpu_ttm_late_init() to free resources used earlier during 1095 * initialization. 1096 * 1097 * Returns: 1098 * 0 for success or a negative error code on failure. 1099 */ 1100 int amdgpu_bo_late_init(struct amdgpu_device *adev) 1101 { 1102 amdgpu_ttm_late_init(adev); 1103 1104 return 0; 1105 } 1106 1107 /** 1108 * amdgpu_bo_fini - tear down memory manager 1109 * @adev: amdgpu device object 1110 * 1111 * Reverses amdgpu_bo_init() to tear down memory manager. 1112 */ 1113 void amdgpu_bo_fini(struct amdgpu_device *adev) 1114 { 1115 amdgpu_ttm_fini(adev); 1116 arch_phys_wc_del(adev->gmc.vram_mtrr); 1117 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size); 1118 } 1119 1120 /** 1121 * amdgpu_bo_fbdev_mmap - mmap fbdev memory 1122 * @bo: &amdgpu_bo buffer object 1123 * @vma: vma as input from the fbdev mmap method 1124 * 1125 * Calls ttm_fbdev_mmap() to mmap fbdev memory if it is backed by a bo. 1126 * 1127 * Returns: 1128 * 0 for success or a negative error code on failure. 1129 */ 1130 int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo, 1131 struct vm_area_struct *vma) 1132 { 1133 if (vma->vm_pgoff != 0) 1134 return -EACCES; 1135 1136 return ttm_bo_mmap_obj(vma, &bo->tbo); 1137 } 1138 1139 /** 1140 * amdgpu_bo_set_tiling_flags - set tiling flags 1141 * @bo: &amdgpu_bo buffer object 1142 * @tiling_flags: new flags 1143 * 1144 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or 1145 * kernel driver to set the tiling flags on a buffer. 1146 * 1147 * Returns: 1148 * 0 for success or a negative error code on failure. 1149 */ 1150 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags) 1151 { 1152 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1153 1154 if (adev->family <= AMDGPU_FAMILY_CZ && 1155 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6) 1156 return -EINVAL; 1157 1158 bo->tiling_flags = tiling_flags; 1159 return 0; 1160 } 1161 1162 /** 1163 * amdgpu_bo_get_tiling_flags - get tiling flags 1164 * @bo: &amdgpu_bo buffer object 1165 * @tiling_flags: returned flags 1166 * 1167 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to 1168 * set the tiling flags on a buffer. 1169 */ 1170 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags) 1171 { 1172 dma_resv_assert_held(bo->tbo.base.resv); 1173 1174 if (tiling_flags) 1175 *tiling_flags = bo->tiling_flags; 1176 } 1177 1178 /** 1179 * amdgpu_bo_set_metadata - set metadata 1180 * @bo: &amdgpu_bo buffer object 1181 * @metadata: new metadata 1182 * @metadata_size: size of the new metadata 1183 * @flags: flags of the new metadata 1184 * 1185 * Sets buffer object's metadata, its size and flags. 1186 * Used via GEM ioctl. 1187 * 1188 * Returns: 1189 * 0 for success or a negative error code on failure. 1190 */ 1191 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata, 1192 uint32_t metadata_size, uint64_t flags) 1193 { 1194 void *buffer; 1195 1196 if (!metadata_size) { 1197 if (bo->metadata_size) { 1198 kfree(bo->metadata); 1199 bo->metadata = NULL; 1200 bo->metadata_size = 0; 1201 } 1202 return 0; 1203 } 1204 1205 if (metadata == NULL) 1206 return -EINVAL; 1207 1208 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL); 1209 if (buffer == NULL) 1210 return -ENOMEM; 1211 1212 kfree(bo->metadata); 1213 bo->metadata_flags = flags; 1214 bo->metadata = buffer; 1215 bo->metadata_size = metadata_size; 1216 1217 return 0; 1218 } 1219 1220 /** 1221 * amdgpu_bo_get_metadata - get metadata 1222 * @bo: &amdgpu_bo buffer object 1223 * @buffer: returned metadata 1224 * @buffer_size: size of the buffer 1225 * @metadata_size: size of the returned metadata 1226 * @flags: flags of the returned metadata 1227 * 1228 * Gets buffer object's metadata, its size and flags. buffer_size shall not be 1229 * less than metadata_size. 1230 * Used via GEM ioctl. 1231 * 1232 * Returns: 1233 * 0 for success or a negative error code on failure. 1234 */ 1235 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer, 1236 size_t buffer_size, uint32_t *metadata_size, 1237 uint64_t *flags) 1238 { 1239 if (!buffer && !metadata_size) 1240 return -EINVAL; 1241 1242 if (buffer) { 1243 if (buffer_size < bo->metadata_size) 1244 return -EINVAL; 1245 1246 if (bo->metadata_size) 1247 memcpy(buffer, bo->metadata, bo->metadata_size); 1248 } 1249 1250 if (metadata_size) 1251 *metadata_size = bo->metadata_size; 1252 if (flags) 1253 *flags = bo->metadata_flags; 1254 1255 return 0; 1256 } 1257 1258 /** 1259 * amdgpu_bo_move_notify - notification about a memory move 1260 * @bo: pointer to a buffer object 1261 * @evict: if this move is evicting the buffer from the graphics address space 1262 * @new_mem: new information of the bufer object 1263 * 1264 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs 1265 * bookkeeping. 1266 * TTM driver callback which is called when ttm moves a buffer. 1267 */ 1268 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, 1269 bool evict, 1270 struct ttm_mem_reg *new_mem) 1271 { 1272 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 1273 struct amdgpu_bo *abo; 1274 struct ttm_mem_reg *old_mem = &bo->mem; 1275 1276 if (!amdgpu_bo_is_amdgpu_bo(bo)) 1277 return; 1278 1279 abo = ttm_to_amdgpu_bo(bo); 1280 amdgpu_vm_bo_invalidate(adev, abo, evict); 1281 1282 amdgpu_bo_kunmap(abo); 1283 1284 if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach && 1285 bo->mem.mem_type != TTM_PL_SYSTEM) 1286 dma_buf_move_notify(abo->tbo.base.dma_buf); 1287 1288 /* remember the eviction */ 1289 if (evict) 1290 atomic64_inc(&adev->num_evictions); 1291 1292 /* update statistics */ 1293 if (!new_mem) 1294 return; 1295 1296 /* move_notify is called before move happens */ 1297 trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type); 1298 } 1299 1300 /** 1301 * amdgpu_bo_move_notify - notification about a BO being released 1302 * @bo: pointer to a buffer object 1303 * 1304 * Wipes VRAM buffers whose contents should not be leaked before the 1305 * memory is released. 1306 */ 1307 void amdgpu_bo_release_notify(struct ttm_buffer_object *bo) 1308 { 1309 struct dma_fence *fence = NULL; 1310 struct amdgpu_bo *abo; 1311 int r; 1312 1313 if (!amdgpu_bo_is_amdgpu_bo(bo)) 1314 return; 1315 1316 abo = ttm_to_amdgpu_bo(bo); 1317 1318 if (abo->kfd_bo) 1319 amdgpu_amdkfd_unreserve_memory_limit(abo); 1320 1321 /* We only remove the fence if the resv has individualized. */ 1322 WARN_ON_ONCE(bo->type == ttm_bo_type_kernel 1323 && bo->base.resv != &bo->base._resv); 1324 if (bo->base.resv == &bo->base._resv) 1325 amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo); 1326 1327 if (bo->mem.mem_type != TTM_PL_VRAM || !bo->mem.mm_node || 1328 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) 1329 return; 1330 1331 dma_resv_lock(bo->base.resv, NULL); 1332 1333 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence); 1334 if (!WARN_ON(r)) { 1335 amdgpu_bo_fence(abo, fence, false); 1336 dma_fence_put(fence); 1337 } 1338 1339 dma_resv_unlock(bo->base.resv); 1340 } 1341 1342 /** 1343 * amdgpu_bo_fault_reserve_notify - notification about a memory fault 1344 * @bo: pointer to a buffer object 1345 * 1346 * Notifies the driver we are taking a fault on this BO and have reserved it, 1347 * also performs bookkeeping. 1348 * TTM driver callback for dealing with vm faults. 1349 * 1350 * Returns: 1351 * 0 for success or a negative error code on failure. 1352 */ 1353 int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo) 1354 { 1355 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 1356 struct ttm_operation_ctx ctx = { false, false }; 1357 struct amdgpu_bo *abo; 1358 unsigned long offset, size; 1359 int r; 1360 1361 if (!amdgpu_bo_is_amdgpu_bo(bo)) 1362 return 0; 1363 1364 abo = ttm_to_amdgpu_bo(bo); 1365 1366 /* Remember that this BO was accessed by the CPU */ 1367 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 1368 1369 if (bo->mem.mem_type != TTM_PL_VRAM) 1370 return 0; 1371 1372 size = bo->mem.num_pages << PAGE_SHIFT; 1373 offset = bo->mem.start << PAGE_SHIFT; 1374 if ((offset + size) <= adev->gmc.visible_vram_size) 1375 return 0; 1376 1377 /* Can't move a pinned BO to visible VRAM */ 1378 if (abo->pin_count > 0) 1379 return -EINVAL; 1380 1381 /* hurrah the memory is not visible ! */ 1382 atomic64_inc(&adev->num_vram_cpu_page_faults); 1383 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM | 1384 AMDGPU_GEM_DOMAIN_GTT); 1385 1386 /* Avoid costly evictions; only set GTT as a busy placement */ 1387 abo->placement.num_busy_placement = 1; 1388 abo->placement.busy_placement = &abo->placements[1]; 1389 1390 r = ttm_bo_validate(bo, &abo->placement, &ctx); 1391 if (unlikely(r != 0)) 1392 return r; 1393 1394 offset = bo->mem.start << PAGE_SHIFT; 1395 /* this should never happen */ 1396 if (bo->mem.mem_type == TTM_PL_VRAM && 1397 (offset + size) > adev->gmc.visible_vram_size) 1398 return -EINVAL; 1399 1400 return 0; 1401 } 1402 1403 /** 1404 * amdgpu_bo_fence - add fence to buffer object 1405 * 1406 * @bo: buffer object in question 1407 * @fence: fence to add 1408 * @shared: true if fence should be added shared 1409 * 1410 */ 1411 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence, 1412 bool shared) 1413 { 1414 struct dma_resv *resv = bo->tbo.base.resv; 1415 1416 if (shared) 1417 dma_resv_add_shared_fence(resv, fence); 1418 else 1419 dma_resv_add_excl_fence(resv, fence); 1420 } 1421 1422 /** 1423 * amdgpu_bo_sync_wait_resv - Wait for BO reservation fences 1424 * 1425 * @adev: amdgpu device pointer 1426 * @resv: reservation object to sync to 1427 * @sync_mode: synchronization mode 1428 * @owner: fence owner 1429 * @intr: Whether the wait is interruptible 1430 * 1431 * Extract the fences from the reservation object and waits for them to finish. 1432 * 1433 * Returns: 1434 * 0 on success, errno otherwise. 1435 */ 1436 int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv, 1437 enum amdgpu_sync_mode sync_mode, void *owner, 1438 bool intr) 1439 { 1440 struct amdgpu_sync sync; 1441 int r; 1442 1443 amdgpu_sync_create(&sync); 1444 amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner); 1445 r = amdgpu_sync_wait(&sync, intr); 1446 amdgpu_sync_free(&sync); 1447 return r; 1448 } 1449 1450 /** 1451 * amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv 1452 * @bo: buffer object to wait for 1453 * @owner: fence owner 1454 * @intr: Whether the wait is interruptible 1455 * 1456 * Wrapper to wait for fences in a BO. 1457 * Returns: 1458 * 0 on success, errno otherwise. 1459 */ 1460 int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr) 1461 { 1462 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1463 1464 return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv, 1465 AMDGPU_SYNC_NE_OWNER, owner, intr); 1466 } 1467 1468 /** 1469 * amdgpu_bo_gpu_offset - return GPU offset of bo 1470 * @bo: amdgpu object for which we query the offset 1471 * 1472 * Note: object should either be pinned or reserved when calling this 1473 * function, it might be useful to add check for this for debugging. 1474 * 1475 * Returns: 1476 * current GPU offset of the object. 1477 */ 1478 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo) 1479 { 1480 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM); 1481 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) && 1482 !bo->pin_count && bo->tbo.type != ttm_bo_type_kernel); 1483 WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET); 1484 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM && 1485 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)); 1486 1487 return amdgpu_gmc_sign_extend(bo->tbo.offset); 1488 } 1489 1490 /** 1491 * amdgpu_bo_get_preferred_pin_domain - get preferred domain for scanout 1492 * @adev: amdgpu device object 1493 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>` 1494 * 1495 * Returns: 1496 * Which of the allowed domains is preferred for pinning the BO for scanout. 1497 */ 1498 uint32_t amdgpu_bo_get_preferred_pin_domain(struct amdgpu_device *adev, 1499 uint32_t domain) 1500 { 1501 if (domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) { 1502 domain = AMDGPU_GEM_DOMAIN_VRAM; 1503 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD) 1504 domain = AMDGPU_GEM_DOMAIN_GTT; 1505 } 1506 return domain; 1507 } 1508