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/drm_drv.h> 37 #include <drm/amdgpu_drm.h> 38 #include <drm/drm_cache.h> 39 #include "amdgpu.h" 40 #include "amdgpu_trace.h" 41 #include "amdgpu_amdkfd.h" 42 43 /** 44 * DOC: amdgpu_object 45 * 46 * This defines the interfaces to operate on an &amdgpu_bo buffer object which 47 * represents memory used by driver (VRAM, system memory, etc.). The driver 48 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces 49 * to create/destroy/set buffer object which are then managed by the kernel TTM 50 * memory manager. 51 * The interfaces are also used internally by kernel clients, including gfx, 52 * uvd, etc. for kernel managed allocations used by the GPU. 53 * 54 */ 55 56 static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo) 57 { 58 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo); 59 60 amdgpu_bo_kunmap(bo); 61 62 if (bo->tbo.base.import_attach) 63 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg); 64 drm_gem_object_release(&bo->tbo.base); 65 amdgpu_bo_unref(&bo->parent); 66 kvfree(bo); 67 } 68 69 static void amdgpu_bo_user_destroy(struct ttm_buffer_object *tbo) 70 { 71 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo); 72 struct amdgpu_bo_user *ubo; 73 74 ubo = to_amdgpu_bo_user(bo); 75 kfree(ubo->metadata); 76 amdgpu_bo_destroy(tbo); 77 } 78 79 static void amdgpu_bo_vm_destroy(struct ttm_buffer_object *tbo) 80 { 81 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev); 82 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo); 83 struct amdgpu_bo_vm *vmbo; 84 85 vmbo = to_amdgpu_bo_vm(bo); 86 /* in case amdgpu_device_recover_vram got NULL of bo->parent */ 87 if (!list_empty(&vmbo->shadow_list)) { 88 mutex_lock(&adev->shadow_list_lock); 89 list_del_init(&vmbo->shadow_list); 90 mutex_unlock(&adev->shadow_list_lock); 91 } 92 93 amdgpu_bo_destroy(tbo); 94 } 95 96 /** 97 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo 98 * @bo: buffer object to be checked 99 * 100 * Uses destroy function associated with the object to determine if this is 101 * an &amdgpu_bo. 102 * 103 * Returns: 104 * true if the object belongs to &amdgpu_bo, false if not. 105 */ 106 bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo) 107 { 108 if (bo->destroy == &amdgpu_bo_destroy || 109 bo->destroy == &amdgpu_bo_user_destroy || 110 bo->destroy == &amdgpu_bo_vm_destroy) 111 return true; 112 113 return false; 114 } 115 116 /** 117 * amdgpu_bo_placement_from_domain - set buffer's placement 118 * @abo: &amdgpu_bo buffer object whose placement is to be set 119 * @domain: requested domain 120 * 121 * Sets buffer's placement according to requested domain and the buffer's 122 * flags. 123 */ 124 void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain) 125 { 126 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev); 127 struct ttm_placement *placement = &abo->placement; 128 struct ttm_place *places = abo->placements; 129 u64 flags = abo->flags; 130 u32 c = 0; 131 132 if (domain & AMDGPU_GEM_DOMAIN_VRAM) { 133 unsigned visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT; 134 135 places[c].fpfn = 0; 136 places[c].lpfn = 0; 137 places[c].mem_type = TTM_PL_VRAM; 138 places[c].flags = 0; 139 140 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) 141 places[c].lpfn = visible_pfn; 142 else 143 places[c].flags |= TTM_PL_FLAG_TOPDOWN; 144 145 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) 146 places[c].flags |= TTM_PL_FLAG_CONTIGUOUS; 147 c++; 148 } 149 150 if (domain & AMDGPU_GEM_DOMAIN_GTT) { 151 places[c].fpfn = 0; 152 places[c].lpfn = 0; 153 places[c].mem_type = 154 abo->flags & AMDGPU_GEM_CREATE_PREEMPTIBLE ? 155 AMDGPU_PL_PREEMPT : TTM_PL_TT; 156 places[c].flags = 0; 157 c++; 158 } 159 160 if (domain & AMDGPU_GEM_DOMAIN_CPU) { 161 places[c].fpfn = 0; 162 places[c].lpfn = 0; 163 places[c].mem_type = TTM_PL_SYSTEM; 164 places[c].flags = 0; 165 c++; 166 } 167 168 if (domain & AMDGPU_GEM_DOMAIN_GDS) { 169 places[c].fpfn = 0; 170 places[c].lpfn = 0; 171 places[c].mem_type = AMDGPU_PL_GDS; 172 places[c].flags = 0; 173 c++; 174 } 175 176 if (domain & AMDGPU_GEM_DOMAIN_GWS) { 177 places[c].fpfn = 0; 178 places[c].lpfn = 0; 179 places[c].mem_type = AMDGPU_PL_GWS; 180 places[c].flags = 0; 181 c++; 182 } 183 184 if (domain & AMDGPU_GEM_DOMAIN_OA) { 185 places[c].fpfn = 0; 186 places[c].lpfn = 0; 187 places[c].mem_type = AMDGPU_PL_OA; 188 places[c].flags = 0; 189 c++; 190 } 191 192 if (!c) { 193 places[c].fpfn = 0; 194 places[c].lpfn = 0; 195 places[c].mem_type = TTM_PL_SYSTEM; 196 places[c].flags = 0; 197 c++; 198 } 199 200 BUG_ON(c > AMDGPU_BO_MAX_PLACEMENTS); 201 202 placement->num_placement = c; 203 placement->placement = places; 204 205 placement->num_busy_placement = c; 206 placement->busy_placement = places; 207 } 208 209 /** 210 * amdgpu_bo_create_reserved - create reserved BO for kernel use 211 * 212 * @adev: amdgpu device object 213 * @size: size for the new BO 214 * @align: alignment for the new BO 215 * @domain: where to place it 216 * @bo_ptr: used to initialize BOs in structures 217 * @gpu_addr: GPU addr of the pinned BO 218 * @cpu_addr: optional CPU address mapping 219 * 220 * Allocates and pins a BO for kernel internal use, and returns it still 221 * reserved. 222 * 223 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL. 224 * 225 * Returns: 226 * 0 on success, negative error code otherwise. 227 */ 228 int amdgpu_bo_create_reserved(struct amdgpu_device *adev, 229 unsigned long size, int align, 230 u32 domain, struct amdgpu_bo **bo_ptr, 231 u64 *gpu_addr, void **cpu_addr) 232 { 233 struct amdgpu_bo_param bp; 234 bool free = false; 235 int r; 236 237 if (!size) { 238 amdgpu_bo_unref(bo_ptr); 239 return 0; 240 } 241 242 memset(&bp, 0, sizeof(bp)); 243 bp.size = size; 244 bp.byte_align = align; 245 bp.domain = domain; 246 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED 247 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS; 248 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS; 249 bp.type = ttm_bo_type_kernel; 250 bp.resv = NULL; 251 bp.bo_ptr_size = sizeof(struct amdgpu_bo); 252 253 if (!*bo_ptr) { 254 r = amdgpu_bo_create(adev, &bp, bo_ptr); 255 if (r) { 256 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n", 257 r); 258 return r; 259 } 260 free = true; 261 } 262 263 r = amdgpu_bo_reserve(*bo_ptr, false); 264 if (r) { 265 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r); 266 goto error_free; 267 } 268 269 r = amdgpu_bo_pin(*bo_ptr, domain); 270 if (r) { 271 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r); 272 goto error_unreserve; 273 } 274 275 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo); 276 if (r) { 277 dev_err(adev->dev, "%p bind failed\n", *bo_ptr); 278 goto error_unpin; 279 } 280 281 if (gpu_addr) 282 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr); 283 284 if (cpu_addr) { 285 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr); 286 if (r) { 287 dev_err(adev->dev, "(%d) kernel bo map failed\n", r); 288 goto error_unpin; 289 } 290 } 291 292 return 0; 293 294 error_unpin: 295 amdgpu_bo_unpin(*bo_ptr); 296 error_unreserve: 297 amdgpu_bo_unreserve(*bo_ptr); 298 299 error_free: 300 if (free) 301 amdgpu_bo_unref(bo_ptr); 302 303 return r; 304 } 305 306 /** 307 * amdgpu_bo_create_kernel - create BO for kernel use 308 * 309 * @adev: amdgpu device object 310 * @size: size for the new BO 311 * @align: alignment for the new BO 312 * @domain: where to place it 313 * @bo_ptr: used to initialize BOs in structures 314 * @gpu_addr: GPU addr of the pinned BO 315 * @cpu_addr: optional CPU address mapping 316 * 317 * Allocates and pins a BO for kernel internal use. 318 * 319 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL. 320 * 321 * Returns: 322 * 0 on success, negative error code otherwise. 323 */ 324 int amdgpu_bo_create_kernel(struct amdgpu_device *adev, 325 unsigned long size, int align, 326 u32 domain, struct amdgpu_bo **bo_ptr, 327 u64 *gpu_addr, void **cpu_addr) 328 { 329 int r; 330 331 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr, 332 gpu_addr, cpu_addr); 333 334 if (r) 335 return r; 336 337 if (*bo_ptr) 338 amdgpu_bo_unreserve(*bo_ptr); 339 340 return 0; 341 } 342 343 /** 344 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location 345 * 346 * @adev: amdgpu device object 347 * @offset: offset of the BO 348 * @size: size of the BO 349 * @bo_ptr: used to initialize BOs in structures 350 * @cpu_addr: optional CPU address mapping 351 * 352 * Creates a kernel BO at a specific offset in VRAM. 353 * 354 * Returns: 355 * 0 on success, negative error code otherwise. 356 */ 357 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev, 358 uint64_t offset, uint64_t size, 359 struct amdgpu_bo **bo_ptr, void **cpu_addr) 360 { 361 struct ttm_operation_ctx ctx = { false, false }; 362 unsigned int i; 363 int r; 364 365 offset &= PAGE_MASK; 366 size = ALIGN(size, PAGE_SIZE); 367 368 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE, 369 AMDGPU_GEM_DOMAIN_VRAM, bo_ptr, NULL, 370 cpu_addr); 371 if (r) 372 return r; 373 374 if ((*bo_ptr) == NULL) 375 return 0; 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_resource_free(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.resource); 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.resource, &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 WARN_ON(amdgpu_ttm_adev((*bo)->tbo.bdev)->in_suspend); 426 427 if (likely(amdgpu_bo_reserve(*bo, true) == 0)) { 428 if (cpu_addr) 429 amdgpu_bo_kunmap(*bo); 430 431 amdgpu_bo_unpin(*bo); 432 amdgpu_bo_unreserve(*bo); 433 } 434 amdgpu_bo_unref(bo); 435 436 if (gpu_addr) 437 *gpu_addr = 0; 438 439 if (cpu_addr) 440 *cpu_addr = NULL; 441 } 442 443 /* Validate bo size is bit bigger then the request domain */ 444 static bool amdgpu_bo_validate_size(struct amdgpu_device *adev, 445 unsigned long size, u32 domain) 446 { 447 struct ttm_resource_manager *man = NULL; 448 449 /* 450 * If GTT is part of requested domains the check must succeed to 451 * allow fall back to GTT. 452 */ 453 if (domain & AMDGPU_GEM_DOMAIN_GTT) { 454 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT); 455 456 if (man && size < man->size) 457 return true; 458 else if (!man) 459 WARN_ON_ONCE("GTT domain requested but GTT mem manager uninitialized"); 460 goto fail; 461 } else if (domain & AMDGPU_GEM_DOMAIN_VRAM) { 462 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM); 463 464 if (man && size < man->size) 465 return true; 466 goto fail; 467 } 468 469 /* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU */ 470 return true; 471 472 fail: 473 DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size, 474 man->size); 475 return false; 476 } 477 478 bool amdgpu_bo_support_uswc(u64 bo_flags) 479 { 480 481 #ifdef CONFIG_X86_32 482 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit 483 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627 484 */ 485 return false; 486 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT) 487 /* Don't try to enable write-combining when it can't work, or things 488 * may be slow 489 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758 490 */ 491 492 #ifndef CONFIG_COMPILE_TEST 493 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \ 494 thanks to write-combining 495 #endif 496 497 if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) 498 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for " 499 "better performance thanks to write-combining\n"); 500 return false; 501 #else 502 /* For architectures that don't support WC memory, 503 * mask out the WC flag from the BO 504 */ 505 if (!drm_arch_can_wc_memory()) 506 return false; 507 508 return true; 509 #endif 510 } 511 512 /** 513 * amdgpu_bo_create - create an &amdgpu_bo buffer object 514 * @adev: amdgpu device object 515 * @bp: parameters to be used for the buffer object 516 * @bo_ptr: pointer to the buffer object pointer 517 * 518 * Creates an &amdgpu_bo buffer object. 519 * 520 * Returns: 521 * 0 for success or a negative error code on failure. 522 */ 523 int amdgpu_bo_create(struct amdgpu_device *adev, 524 struct amdgpu_bo_param *bp, 525 struct amdgpu_bo **bo_ptr) 526 { 527 struct ttm_operation_ctx ctx = { 528 .interruptible = (bp->type != ttm_bo_type_kernel), 529 .no_wait_gpu = bp->no_wait_gpu, 530 /* We opt to avoid OOM on system pages allocations */ 531 .gfp_retry_mayfail = true, 532 .allow_res_evict = bp->type != ttm_bo_type_kernel, 533 .resv = bp->resv 534 }; 535 struct amdgpu_bo *bo; 536 unsigned long page_align, size = bp->size; 537 int r; 538 539 /* Note that GDS/GWS/OA allocates 1 page per byte/resource. */ 540 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) { 541 /* GWS and OA don't need any alignment. */ 542 page_align = bp->byte_align; 543 size <<= PAGE_SHIFT; 544 545 } else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) { 546 /* Both size and alignment must be a multiple of 4. */ 547 page_align = ALIGN(bp->byte_align, 4); 548 size = ALIGN(size, 4) << PAGE_SHIFT; 549 } else { 550 /* Memory should be aligned at least to a page size. */ 551 page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT; 552 size = ALIGN(size, PAGE_SIZE); 553 } 554 555 if (!amdgpu_bo_validate_size(adev, size, bp->domain)) 556 return -ENOMEM; 557 558 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo)); 559 560 *bo_ptr = NULL; 561 bo = kvzalloc(bp->bo_ptr_size, GFP_KERNEL); 562 if (bo == NULL) 563 return -ENOMEM; 564 drm_gem_private_object_init(adev_to_drm(adev), &bo->tbo.base, size); 565 bo->vm_bo = NULL; 566 bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain : 567 bp->domain; 568 bo->allowed_domains = bo->preferred_domains; 569 if (bp->type != ttm_bo_type_kernel && 570 !(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE) && 571 bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM) 572 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT; 573 574 bo->flags = bp->flags; 575 576 if (!amdgpu_bo_support_uswc(bo->flags)) 577 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC; 578 579 if (adev->ras_enabled) 580 bo->flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE; 581 582 bo->tbo.bdev = &adev->mman.bdev; 583 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA | 584 AMDGPU_GEM_DOMAIN_GDS)) 585 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU); 586 else 587 amdgpu_bo_placement_from_domain(bo, bp->domain); 588 if (bp->type == ttm_bo_type_kernel) 589 bo->tbo.priority = 1; 590 591 if (!bp->destroy) 592 bp->destroy = &amdgpu_bo_destroy; 593 594 r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, bp->type, 595 &bo->placement, page_align, &ctx, NULL, 596 bp->resv, bp->destroy); 597 if (unlikely(r != 0)) 598 return r; 599 600 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) && 601 bo->tbo.resource->mem_type == TTM_PL_VRAM && 602 bo->tbo.resource->start < adev->gmc.visible_vram_size >> PAGE_SHIFT) 603 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 604 ctx.bytes_moved); 605 else 606 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0); 607 608 if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED && 609 bo->tbo.resource->mem_type == TTM_PL_VRAM) { 610 struct dma_fence *fence; 611 612 r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence); 613 if (unlikely(r)) 614 goto fail_unreserve; 615 616 dma_resv_add_fence(bo->tbo.base.resv, fence, 617 DMA_RESV_USAGE_KERNEL); 618 dma_fence_put(fence); 619 } 620 if (!bp->resv) 621 amdgpu_bo_unreserve(bo); 622 *bo_ptr = bo; 623 624 trace_amdgpu_bo_create(bo); 625 626 /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */ 627 if (bp->type == ttm_bo_type_device) 628 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 629 630 return 0; 631 632 fail_unreserve: 633 if (!bp->resv) 634 dma_resv_unlock(bo->tbo.base.resv); 635 amdgpu_bo_unref(&bo); 636 return r; 637 } 638 639 /** 640 * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object 641 * @adev: amdgpu device object 642 * @bp: parameters to be used for the buffer object 643 * @ubo_ptr: pointer to the buffer object pointer 644 * 645 * Create a BO to be used by user application; 646 * 647 * Returns: 648 * 0 for success or a negative error code on failure. 649 */ 650 651 int amdgpu_bo_create_user(struct amdgpu_device *adev, 652 struct amdgpu_bo_param *bp, 653 struct amdgpu_bo_user **ubo_ptr) 654 { 655 struct amdgpu_bo *bo_ptr; 656 int r; 657 658 bp->bo_ptr_size = sizeof(struct amdgpu_bo_user); 659 bp->destroy = &amdgpu_bo_user_destroy; 660 r = amdgpu_bo_create(adev, bp, &bo_ptr); 661 if (r) 662 return r; 663 664 *ubo_ptr = to_amdgpu_bo_user(bo_ptr); 665 return r; 666 } 667 668 /** 669 * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object 670 * @adev: amdgpu device object 671 * @bp: parameters to be used for the buffer object 672 * @vmbo_ptr: pointer to the buffer object pointer 673 * 674 * Create a BO to be for GPUVM. 675 * 676 * Returns: 677 * 0 for success or a negative error code on failure. 678 */ 679 680 int amdgpu_bo_create_vm(struct amdgpu_device *adev, 681 struct amdgpu_bo_param *bp, 682 struct amdgpu_bo_vm **vmbo_ptr) 683 { 684 struct amdgpu_bo *bo_ptr; 685 int r; 686 687 /* bo_ptr_size will be determined by the caller and it depends on 688 * num of amdgpu_vm_pt entries. 689 */ 690 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm)); 691 r = amdgpu_bo_create(adev, bp, &bo_ptr); 692 if (r) 693 return r; 694 695 *vmbo_ptr = to_amdgpu_bo_vm(bo_ptr); 696 INIT_LIST_HEAD(&(*vmbo_ptr)->shadow_list); 697 /* Set destroy callback to amdgpu_bo_vm_destroy after vmbo->shadow_list 698 * is initialized. 699 */ 700 bo_ptr->tbo.destroy = &amdgpu_bo_vm_destroy; 701 return r; 702 } 703 704 /** 705 * amdgpu_bo_add_to_shadow_list - add a BO to the shadow list 706 * 707 * @vmbo: BO that will be inserted into the shadow list 708 * 709 * Insert a BO to the shadow list. 710 */ 711 void amdgpu_bo_add_to_shadow_list(struct amdgpu_bo_vm *vmbo) 712 { 713 struct amdgpu_device *adev = amdgpu_ttm_adev(vmbo->bo.tbo.bdev); 714 715 mutex_lock(&adev->shadow_list_lock); 716 list_add_tail(&vmbo->shadow_list, &adev->shadow_list); 717 mutex_unlock(&adev->shadow_list_lock); 718 } 719 720 /** 721 * amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow 722 * 723 * @shadow: &amdgpu_bo shadow to be restored 724 * @fence: dma_fence associated with the operation 725 * 726 * Copies a buffer object's shadow content back to the object. 727 * This is used for recovering a buffer from its shadow in case of a gpu 728 * reset where vram context may be lost. 729 * 730 * Returns: 731 * 0 for success or a negative error code on failure. 732 */ 733 int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence) 734 735 { 736 struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev); 737 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; 738 uint64_t shadow_addr, parent_addr; 739 740 shadow_addr = amdgpu_bo_gpu_offset(shadow); 741 parent_addr = amdgpu_bo_gpu_offset(shadow->parent); 742 743 return amdgpu_copy_buffer(ring, shadow_addr, parent_addr, 744 amdgpu_bo_size(shadow), NULL, fence, 745 true, false, false); 746 } 747 748 /** 749 * amdgpu_bo_kmap - map an &amdgpu_bo buffer object 750 * @bo: &amdgpu_bo buffer object to be mapped 751 * @ptr: kernel virtual address to be returned 752 * 753 * Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls 754 * amdgpu_bo_kptr() to get the kernel virtual address. 755 * 756 * Returns: 757 * 0 for success or a negative error code on failure. 758 */ 759 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr) 760 { 761 void *kptr; 762 long r; 763 764 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) 765 return -EPERM; 766 767 r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL, 768 false, MAX_SCHEDULE_TIMEOUT); 769 if (r < 0) 770 return r; 771 772 kptr = amdgpu_bo_kptr(bo); 773 if (kptr) { 774 if (ptr) 775 *ptr = kptr; 776 return 0; 777 } 778 779 r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap); 780 if (r) 781 return r; 782 783 if (ptr) 784 *ptr = amdgpu_bo_kptr(bo); 785 786 return 0; 787 } 788 789 /** 790 * amdgpu_bo_kptr - returns a kernel virtual address of the buffer object 791 * @bo: &amdgpu_bo buffer object 792 * 793 * Calls ttm_kmap_obj_virtual() to get the kernel virtual address 794 * 795 * Returns: 796 * the virtual address of a buffer object area. 797 */ 798 void *amdgpu_bo_kptr(struct amdgpu_bo *bo) 799 { 800 bool is_iomem; 801 802 return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); 803 } 804 805 /** 806 * amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object 807 * @bo: &amdgpu_bo buffer object to be unmapped 808 * 809 * Unmaps a kernel map set up by amdgpu_bo_kmap(). 810 */ 811 void amdgpu_bo_kunmap(struct amdgpu_bo *bo) 812 { 813 if (bo->kmap.bo) 814 ttm_bo_kunmap(&bo->kmap); 815 } 816 817 /** 818 * amdgpu_bo_ref - reference an &amdgpu_bo buffer object 819 * @bo: &amdgpu_bo buffer object 820 * 821 * References the contained &ttm_buffer_object. 822 * 823 * Returns: 824 * a refcounted pointer to the &amdgpu_bo buffer object. 825 */ 826 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo) 827 { 828 if (bo == NULL) 829 return NULL; 830 831 ttm_bo_get(&bo->tbo); 832 return bo; 833 } 834 835 /** 836 * amdgpu_bo_unref - unreference an &amdgpu_bo buffer object 837 * @bo: &amdgpu_bo buffer object 838 * 839 * Unreferences the contained &ttm_buffer_object and clear the pointer 840 */ 841 void amdgpu_bo_unref(struct amdgpu_bo **bo) 842 { 843 struct ttm_buffer_object *tbo; 844 845 if ((*bo) == NULL) 846 return; 847 848 tbo = &((*bo)->tbo); 849 ttm_bo_put(tbo); 850 *bo = NULL; 851 } 852 853 /** 854 * amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object 855 * @bo: &amdgpu_bo buffer object to be pinned 856 * @domain: domain to be pinned to 857 * @min_offset: the start of requested address range 858 * @max_offset: the end of requested address range 859 * 860 * Pins the buffer object according to requested domain and address range. If 861 * the memory is unbound gart memory, binds the pages into gart table. Adjusts 862 * pin_count and pin_size accordingly. 863 * 864 * Pinning means to lock pages in memory along with keeping them at a fixed 865 * offset. It is required when a buffer can not be moved, for example, when 866 * a display buffer is being scanned out. 867 * 868 * Compared with amdgpu_bo_pin(), this function gives more flexibility on 869 * where to pin a buffer if there are specific restrictions on where a buffer 870 * must be located. 871 * 872 * Returns: 873 * 0 for success or a negative error code on failure. 874 */ 875 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain, 876 u64 min_offset, u64 max_offset) 877 { 878 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 879 struct ttm_operation_ctx ctx = { false, false }; 880 int r, i; 881 882 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm)) 883 return -EPERM; 884 885 if (WARN_ON_ONCE(min_offset > max_offset)) 886 return -EINVAL; 887 888 /* Check domain to be pinned to against preferred domains */ 889 if (bo->preferred_domains & domain) 890 domain = bo->preferred_domains & domain; 891 892 /* A shared bo cannot be migrated to VRAM */ 893 if (bo->tbo.base.import_attach) { 894 if (domain & AMDGPU_GEM_DOMAIN_GTT) 895 domain = AMDGPU_GEM_DOMAIN_GTT; 896 else 897 return -EINVAL; 898 } 899 900 if (bo->tbo.pin_count) { 901 uint32_t mem_type = bo->tbo.resource->mem_type; 902 uint32_t mem_flags = bo->tbo.resource->placement; 903 904 if (!(domain & amdgpu_mem_type_to_domain(mem_type))) 905 return -EINVAL; 906 907 if ((mem_type == TTM_PL_VRAM) && 908 (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) && 909 !(mem_flags & TTM_PL_FLAG_CONTIGUOUS)) 910 return -EINVAL; 911 912 ttm_bo_pin(&bo->tbo); 913 914 if (max_offset != 0) { 915 u64 domain_start = amdgpu_ttm_domain_start(adev, 916 mem_type); 917 WARN_ON_ONCE(max_offset < 918 (amdgpu_bo_gpu_offset(bo) - domain_start)); 919 } 920 921 return 0; 922 } 923 924 /* This assumes only APU display buffers are pinned with (VRAM|GTT). 925 * See function amdgpu_display_supported_domains() 926 */ 927 domain = amdgpu_bo_get_preferred_domain(adev, domain); 928 929 if (bo->tbo.base.import_attach) 930 dma_buf_pin(bo->tbo.base.import_attach); 931 932 /* force to pin into visible video ram */ 933 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) 934 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 935 amdgpu_bo_placement_from_domain(bo, domain); 936 for (i = 0; i < bo->placement.num_placement; i++) { 937 unsigned fpfn, lpfn; 938 939 fpfn = min_offset >> PAGE_SHIFT; 940 lpfn = max_offset >> PAGE_SHIFT; 941 942 if (fpfn > bo->placements[i].fpfn) 943 bo->placements[i].fpfn = fpfn; 944 if (!bo->placements[i].lpfn || 945 (lpfn && lpfn < bo->placements[i].lpfn)) 946 bo->placements[i].lpfn = lpfn; 947 } 948 949 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 950 if (unlikely(r)) { 951 dev_err(adev->dev, "%p pin failed\n", bo); 952 goto error; 953 } 954 955 ttm_bo_pin(&bo->tbo); 956 957 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type); 958 if (domain == AMDGPU_GEM_DOMAIN_VRAM) { 959 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size); 960 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo), 961 &adev->visible_pin_size); 962 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) { 963 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size); 964 } 965 966 error: 967 return r; 968 } 969 970 /** 971 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object 972 * @bo: &amdgpu_bo buffer object to be pinned 973 * @domain: domain to be pinned to 974 * 975 * A simple wrapper to amdgpu_bo_pin_restricted(). 976 * Provides a simpler API for buffers that do not have any strict restrictions 977 * on where a buffer must be located. 978 * 979 * Returns: 980 * 0 for success or a negative error code on failure. 981 */ 982 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain) 983 { 984 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS; 985 return amdgpu_bo_pin_restricted(bo, domain, 0, 0); 986 } 987 988 /** 989 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object 990 * @bo: &amdgpu_bo buffer object to be unpinned 991 * 992 * Decreases the pin_count, and clears the flags if pin_count reaches 0. 993 * Changes placement and pin size accordingly. 994 * 995 * Returns: 996 * 0 for success or a negative error code on failure. 997 */ 998 void amdgpu_bo_unpin(struct amdgpu_bo *bo) 999 { 1000 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1001 1002 ttm_bo_unpin(&bo->tbo); 1003 if (bo->tbo.pin_count) 1004 return; 1005 1006 if (bo->tbo.base.import_attach) 1007 dma_buf_unpin(bo->tbo.base.import_attach); 1008 1009 if (bo->tbo.resource->mem_type == TTM_PL_VRAM) { 1010 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size); 1011 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo), 1012 &adev->visible_pin_size); 1013 } else if (bo->tbo.resource->mem_type == TTM_PL_TT) { 1014 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size); 1015 } 1016 } 1017 1018 static const char *amdgpu_vram_names[] = { 1019 "UNKNOWN", 1020 "GDDR1", 1021 "DDR2", 1022 "GDDR3", 1023 "GDDR4", 1024 "GDDR5", 1025 "HBM", 1026 "DDR3", 1027 "DDR4", 1028 "GDDR6", 1029 "DDR5", 1030 "LPDDR4", 1031 "LPDDR5" 1032 }; 1033 1034 /** 1035 * amdgpu_bo_init - initialize memory manager 1036 * @adev: amdgpu device object 1037 * 1038 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager. 1039 * 1040 * Returns: 1041 * 0 for success or a negative error code on failure. 1042 */ 1043 int amdgpu_bo_init(struct amdgpu_device *adev) 1044 { 1045 /* On A+A platform, VRAM can be mapped as WB */ 1046 if (!adev->gmc.xgmi.connected_to_cpu) { 1047 /* reserve PAT memory space to WC for VRAM */ 1048 int r = arch_io_reserve_memtype_wc(adev->gmc.aper_base, 1049 adev->gmc.aper_size); 1050 1051 if (r) { 1052 DRM_ERROR("Unable to set WC memtype for the aperture base\n"); 1053 return r; 1054 } 1055 1056 /* Add an MTRR for the VRAM */ 1057 adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base, 1058 adev->gmc.aper_size); 1059 } 1060 1061 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n", 1062 adev->gmc.mc_vram_size >> 20, 1063 (unsigned long long)adev->gmc.aper_size >> 20); 1064 DRM_INFO("RAM width %dbits %s\n", 1065 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]); 1066 return amdgpu_ttm_init(adev); 1067 } 1068 1069 /** 1070 * amdgpu_bo_fini - tear down memory manager 1071 * @adev: amdgpu device object 1072 * 1073 * Reverses amdgpu_bo_init() to tear down memory manager. 1074 */ 1075 void amdgpu_bo_fini(struct amdgpu_device *adev) 1076 { 1077 int idx; 1078 1079 amdgpu_ttm_fini(adev); 1080 1081 if (drm_dev_enter(adev_to_drm(adev), &idx)) { 1082 1083 if (!adev->gmc.xgmi.connected_to_cpu) { 1084 arch_phys_wc_del(adev->gmc.vram_mtrr); 1085 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size); 1086 } 1087 drm_dev_exit(idx); 1088 } 1089 } 1090 1091 /** 1092 * amdgpu_bo_set_tiling_flags - set tiling flags 1093 * @bo: &amdgpu_bo buffer object 1094 * @tiling_flags: new flags 1095 * 1096 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or 1097 * kernel driver to set the tiling flags on a buffer. 1098 * 1099 * Returns: 1100 * 0 for success or a negative error code on failure. 1101 */ 1102 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags) 1103 { 1104 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1105 struct amdgpu_bo_user *ubo; 1106 1107 BUG_ON(bo->tbo.type == ttm_bo_type_kernel); 1108 if (adev->family <= AMDGPU_FAMILY_CZ && 1109 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6) 1110 return -EINVAL; 1111 1112 ubo = to_amdgpu_bo_user(bo); 1113 ubo->tiling_flags = tiling_flags; 1114 return 0; 1115 } 1116 1117 /** 1118 * amdgpu_bo_get_tiling_flags - get tiling flags 1119 * @bo: &amdgpu_bo buffer object 1120 * @tiling_flags: returned flags 1121 * 1122 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to 1123 * set the tiling flags on a buffer. 1124 */ 1125 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags) 1126 { 1127 struct amdgpu_bo_user *ubo; 1128 1129 BUG_ON(bo->tbo.type == ttm_bo_type_kernel); 1130 dma_resv_assert_held(bo->tbo.base.resv); 1131 ubo = to_amdgpu_bo_user(bo); 1132 1133 if (tiling_flags) 1134 *tiling_flags = ubo->tiling_flags; 1135 } 1136 1137 /** 1138 * amdgpu_bo_set_metadata - set metadata 1139 * @bo: &amdgpu_bo buffer object 1140 * @metadata: new metadata 1141 * @metadata_size: size of the new metadata 1142 * @flags: flags of the new metadata 1143 * 1144 * Sets buffer object's metadata, its size and flags. 1145 * Used via GEM ioctl. 1146 * 1147 * Returns: 1148 * 0 for success or a negative error code on failure. 1149 */ 1150 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata, 1151 uint32_t metadata_size, uint64_t flags) 1152 { 1153 struct amdgpu_bo_user *ubo; 1154 void *buffer; 1155 1156 BUG_ON(bo->tbo.type == ttm_bo_type_kernel); 1157 ubo = to_amdgpu_bo_user(bo); 1158 if (!metadata_size) { 1159 if (ubo->metadata_size) { 1160 kfree(ubo->metadata); 1161 ubo->metadata = NULL; 1162 ubo->metadata_size = 0; 1163 } 1164 return 0; 1165 } 1166 1167 if (metadata == NULL) 1168 return -EINVAL; 1169 1170 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL); 1171 if (buffer == NULL) 1172 return -ENOMEM; 1173 1174 kfree(ubo->metadata); 1175 ubo->metadata_flags = flags; 1176 ubo->metadata = buffer; 1177 ubo->metadata_size = metadata_size; 1178 1179 return 0; 1180 } 1181 1182 /** 1183 * amdgpu_bo_get_metadata - get metadata 1184 * @bo: &amdgpu_bo buffer object 1185 * @buffer: returned metadata 1186 * @buffer_size: size of the buffer 1187 * @metadata_size: size of the returned metadata 1188 * @flags: flags of the returned metadata 1189 * 1190 * Gets buffer object's metadata, its size and flags. buffer_size shall not be 1191 * less than metadata_size. 1192 * Used via GEM ioctl. 1193 * 1194 * Returns: 1195 * 0 for success or a negative error code on failure. 1196 */ 1197 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer, 1198 size_t buffer_size, uint32_t *metadata_size, 1199 uint64_t *flags) 1200 { 1201 struct amdgpu_bo_user *ubo; 1202 1203 if (!buffer && !metadata_size) 1204 return -EINVAL; 1205 1206 BUG_ON(bo->tbo.type == ttm_bo_type_kernel); 1207 ubo = to_amdgpu_bo_user(bo); 1208 if (metadata_size) 1209 *metadata_size = ubo->metadata_size; 1210 1211 if (buffer) { 1212 if (buffer_size < ubo->metadata_size) 1213 return -EINVAL; 1214 1215 if (ubo->metadata_size) 1216 memcpy(buffer, ubo->metadata, ubo->metadata_size); 1217 } 1218 1219 if (flags) 1220 *flags = ubo->metadata_flags; 1221 1222 return 0; 1223 } 1224 1225 /** 1226 * amdgpu_bo_move_notify - notification about a memory move 1227 * @bo: pointer to a buffer object 1228 * @evict: if this move is evicting the buffer from the graphics address space 1229 * @new_mem: new information of the bufer object 1230 * 1231 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs 1232 * bookkeeping. 1233 * TTM driver callback which is called when ttm moves a buffer. 1234 */ 1235 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, 1236 bool evict, 1237 struct ttm_resource *new_mem) 1238 { 1239 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 1240 struct amdgpu_bo *abo; 1241 struct ttm_resource *old_mem = bo->resource; 1242 1243 if (!amdgpu_bo_is_amdgpu_bo(bo)) 1244 return; 1245 1246 abo = ttm_to_amdgpu_bo(bo); 1247 amdgpu_vm_bo_invalidate(adev, abo, evict); 1248 1249 amdgpu_bo_kunmap(abo); 1250 1251 if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach && 1252 bo->resource->mem_type != TTM_PL_SYSTEM) 1253 dma_buf_move_notify(abo->tbo.base.dma_buf); 1254 1255 /* remember the eviction */ 1256 if (evict) 1257 atomic64_inc(&adev->num_evictions); 1258 1259 /* update statistics */ 1260 if (!new_mem) 1261 return; 1262 1263 /* move_notify is called before move happens */ 1264 trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type); 1265 } 1266 1267 void amdgpu_bo_get_memory(struct amdgpu_bo *bo, uint64_t *vram_mem, 1268 uint64_t *gtt_mem, uint64_t *cpu_mem) 1269 { 1270 unsigned int domain; 1271 1272 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type); 1273 switch (domain) { 1274 case AMDGPU_GEM_DOMAIN_VRAM: 1275 *vram_mem += amdgpu_bo_size(bo); 1276 break; 1277 case AMDGPU_GEM_DOMAIN_GTT: 1278 *gtt_mem += amdgpu_bo_size(bo); 1279 break; 1280 case AMDGPU_GEM_DOMAIN_CPU: 1281 default: 1282 *cpu_mem += amdgpu_bo_size(bo); 1283 break; 1284 } 1285 } 1286 1287 /** 1288 * amdgpu_bo_release_notify - notification about a BO being released 1289 * @bo: pointer to a buffer object 1290 * 1291 * Wipes VRAM buffers whose contents should not be leaked before the 1292 * memory is released. 1293 */ 1294 void amdgpu_bo_release_notify(struct ttm_buffer_object *bo) 1295 { 1296 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 1297 struct dma_fence *fence = NULL; 1298 struct amdgpu_bo *abo; 1299 int r; 1300 1301 if (!amdgpu_bo_is_amdgpu_bo(bo)) 1302 return; 1303 1304 abo = ttm_to_amdgpu_bo(bo); 1305 1306 if (abo->kfd_bo) 1307 amdgpu_amdkfd_release_notify(abo); 1308 1309 /* We only remove the fence if the resv has individualized. */ 1310 WARN_ON_ONCE(bo->type == ttm_bo_type_kernel 1311 && bo->base.resv != &bo->base._resv); 1312 if (bo->base.resv == &bo->base._resv) 1313 amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo); 1314 1315 if (!bo->resource || bo->resource->mem_type != TTM_PL_VRAM || 1316 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE) || 1317 adev->in_suspend || adev->shutdown) 1318 return; 1319 1320 if (WARN_ON_ONCE(!dma_resv_trylock(bo->base.resv))) 1321 return; 1322 1323 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence); 1324 if (!WARN_ON(r)) { 1325 amdgpu_bo_fence(abo, fence, false); 1326 dma_fence_put(fence); 1327 } 1328 1329 dma_resv_unlock(bo->base.resv); 1330 } 1331 1332 /** 1333 * amdgpu_bo_fault_reserve_notify - notification about a memory fault 1334 * @bo: pointer to a buffer object 1335 * 1336 * Notifies the driver we are taking a fault on this BO and have reserved it, 1337 * also performs bookkeeping. 1338 * TTM driver callback for dealing with vm faults. 1339 * 1340 * Returns: 1341 * 0 for success or a negative error code on failure. 1342 */ 1343 vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo) 1344 { 1345 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 1346 struct ttm_operation_ctx ctx = { false, false }; 1347 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo); 1348 unsigned long offset; 1349 int r; 1350 1351 /* Remember that this BO was accessed by the CPU */ 1352 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 1353 1354 if (bo->resource->mem_type != TTM_PL_VRAM) 1355 return 0; 1356 1357 offset = bo->resource->start << PAGE_SHIFT; 1358 if ((offset + bo->base.size) <= adev->gmc.visible_vram_size) 1359 return 0; 1360 1361 /* Can't move a pinned BO to visible VRAM */ 1362 if (abo->tbo.pin_count > 0) 1363 return VM_FAULT_SIGBUS; 1364 1365 /* hurrah the memory is not visible ! */ 1366 atomic64_inc(&adev->num_vram_cpu_page_faults); 1367 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM | 1368 AMDGPU_GEM_DOMAIN_GTT); 1369 1370 /* Avoid costly evictions; only set GTT as a busy placement */ 1371 abo->placement.num_busy_placement = 1; 1372 abo->placement.busy_placement = &abo->placements[1]; 1373 1374 r = ttm_bo_validate(bo, &abo->placement, &ctx); 1375 if (unlikely(r == -EBUSY || r == -ERESTARTSYS)) 1376 return VM_FAULT_NOPAGE; 1377 else if (unlikely(r)) 1378 return VM_FAULT_SIGBUS; 1379 1380 offset = bo->resource->start << PAGE_SHIFT; 1381 /* this should never happen */ 1382 if (bo->resource->mem_type == TTM_PL_VRAM && 1383 (offset + bo->base.size) > adev->gmc.visible_vram_size) 1384 return VM_FAULT_SIGBUS; 1385 1386 ttm_bo_move_to_lru_tail_unlocked(bo); 1387 return 0; 1388 } 1389 1390 /** 1391 * amdgpu_bo_fence - add fence to buffer object 1392 * 1393 * @bo: buffer object in question 1394 * @fence: fence to add 1395 * @shared: true if fence should be added shared 1396 * 1397 */ 1398 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence, 1399 bool shared) 1400 { 1401 struct dma_resv *resv = bo->tbo.base.resv; 1402 int r; 1403 1404 r = dma_resv_reserve_fences(resv, 1); 1405 if (r) { 1406 /* As last resort on OOM we block for the fence */ 1407 dma_fence_wait(fence, false); 1408 return; 1409 } 1410 1411 dma_resv_add_fence(resv, fence, shared ? DMA_RESV_USAGE_READ : 1412 DMA_RESV_USAGE_WRITE); 1413 } 1414 1415 /** 1416 * amdgpu_bo_sync_wait_resv - Wait for BO reservation fences 1417 * 1418 * @adev: amdgpu device pointer 1419 * @resv: reservation object to sync to 1420 * @sync_mode: synchronization mode 1421 * @owner: fence owner 1422 * @intr: Whether the wait is interruptible 1423 * 1424 * Extract the fences from the reservation object and waits for them to finish. 1425 * 1426 * Returns: 1427 * 0 on success, errno otherwise. 1428 */ 1429 int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv, 1430 enum amdgpu_sync_mode sync_mode, void *owner, 1431 bool intr) 1432 { 1433 struct amdgpu_sync sync; 1434 int r; 1435 1436 amdgpu_sync_create(&sync); 1437 amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner); 1438 r = amdgpu_sync_wait(&sync, intr); 1439 amdgpu_sync_free(&sync); 1440 return r; 1441 } 1442 1443 /** 1444 * amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv 1445 * @bo: buffer object to wait for 1446 * @owner: fence owner 1447 * @intr: Whether the wait is interruptible 1448 * 1449 * Wrapper to wait for fences in a BO. 1450 * Returns: 1451 * 0 on success, errno otherwise. 1452 */ 1453 int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr) 1454 { 1455 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1456 1457 return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv, 1458 AMDGPU_SYNC_NE_OWNER, owner, intr); 1459 } 1460 1461 /** 1462 * amdgpu_bo_gpu_offset - return GPU offset of bo 1463 * @bo: amdgpu object for which we query the offset 1464 * 1465 * Note: object should either be pinned or reserved when calling this 1466 * function, it might be useful to add check for this for debugging. 1467 * 1468 * Returns: 1469 * current GPU offset of the object. 1470 */ 1471 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo) 1472 { 1473 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_SYSTEM); 1474 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) && 1475 !bo->tbo.pin_count && bo->tbo.type != ttm_bo_type_kernel); 1476 WARN_ON_ONCE(bo->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET); 1477 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_VRAM && 1478 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)); 1479 1480 return amdgpu_bo_gpu_offset_no_check(bo); 1481 } 1482 1483 /** 1484 * amdgpu_bo_gpu_offset_no_check - return GPU offset of bo 1485 * @bo: amdgpu object for which we query the offset 1486 * 1487 * Returns: 1488 * current GPU offset of the object without raising warnings. 1489 */ 1490 u64 amdgpu_bo_gpu_offset_no_check(struct amdgpu_bo *bo) 1491 { 1492 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 1493 uint64_t offset; 1494 1495 offset = (bo->tbo.resource->start << PAGE_SHIFT) + 1496 amdgpu_ttm_domain_start(adev, bo->tbo.resource->mem_type); 1497 1498 return amdgpu_gmc_sign_extend(offset); 1499 } 1500 1501 /** 1502 * amdgpu_bo_get_preferred_domain - get preferred domain 1503 * @adev: amdgpu device object 1504 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>` 1505 * 1506 * Returns: 1507 * Which of the allowed domains is preferred for allocating the BO. 1508 */ 1509 uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev, 1510 uint32_t domain) 1511 { 1512 if ((domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) && 1513 ((adev->asic_type == CHIP_CARRIZO) || (adev->asic_type == CHIP_STONEY))) { 1514 domain = AMDGPU_GEM_DOMAIN_VRAM; 1515 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD) 1516 domain = AMDGPU_GEM_DOMAIN_GTT; 1517 } 1518 return domain; 1519 } 1520 1521 #if defined(CONFIG_DEBUG_FS) 1522 #define amdgpu_bo_print_flag(m, bo, flag) \ 1523 do { \ 1524 if (bo->flags & (AMDGPU_GEM_CREATE_ ## flag)) { \ 1525 seq_printf((m), " " #flag); \ 1526 } \ 1527 } while (0) 1528 1529 /** 1530 * amdgpu_bo_print_info - print BO info in debugfs file 1531 * 1532 * @id: Index or Id of the BO 1533 * @bo: Requested BO for printing info 1534 * @m: debugfs file 1535 * 1536 * Print BO information in debugfs file 1537 * 1538 * Returns: 1539 * Size of the BO in bytes. 1540 */ 1541 u64 amdgpu_bo_print_info(int id, struct amdgpu_bo *bo, struct seq_file *m) 1542 { 1543 struct dma_buf_attachment *attachment; 1544 struct dma_buf *dma_buf; 1545 unsigned int domain; 1546 const char *placement; 1547 unsigned int pin_count; 1548 u64 size; 1549 1550 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type); 1551 switch (domain) { 1552 case AMDGPU_GEM_DOMAIN_VRAM: 1553 placement = "VRAM"; 1554 break; 1555 case AMDGPU_GEM_DOMAIN_GTT: 1556 placement = " GTT"; 1557 break; 1558 case AMDGPU_GEM_DOMAIN_CPU: 1559 default: 1560 placement = " CPU"; 1561 break; 1562 } 1563 1564 size = amdgpu_bo_size(bo); 1565 seq_printf(m, "\t\t0x%08x: %12lld byte %s", 1566 id, size, placement); 1567 1568 pin_count = READ_ONCE(bo->tbo.pin_count); 1569 if (pin_count) 1570 seq_printf(m, " pin count %d", pin_count); 1571 1572 dma_buf = READ_ONCE(bo->tbo.base.dma_buf); 1573 attachment = READ_ONCE(bo->tbo.base.import_attach); 1574 1575 if (attachment) 1576 seq_printf(m, " imported from %p", dma_buf); 1577 else if (dma_buf) 1578 seq_printf(m, " exported as %p", dma_buf); 1579 1580 amdgpu_bo_print_flag(m, bo, CPU_ACCESS_REQUIRED); 1581 amdgpu_bo_print_flag(m, bo, NO_CPU_ACCESS); 1582 amdgpu_bo_print_flag(m, bo, CPU_GTT_USWC); 1583 amdgpu_bo_print_flag(m, bo, VRAM_CLEARED); 1584 amdgpu_bo_print_flag(m, bo, VRAM_CONTIGUOUS); 1585 amdgpu_bo_print_flag(m, bo, VM_ALWAYS_VALID); 1586 amdgpu_bo_print_flag(m, bo, EXPLICIT_SYNC); 1587 1588 seq_puts(m, "\n"); 1589 1590 return size; 1591 } 1592 #endif 1593