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 33 #include <linux/dma-mapping.h> 34 #include <linux/iommu.h> 35 #include <linux/hmm.h> 36 #include <linux/pagemap.h> 37 #include <linux/sched/task.h> 38 #include <linux/sched/mm.h> 39 #include <linux/seq_file.h> 40 #include <linux/slab.h> 41 #include <linux/swap.h> 42 #include <linux/swiotlb.h> 43 #include <linux/dma-buf.h> 44 #include <linux/sizes.h> 45 46 #include <drm/ttm/ttm_bo_api.h> 47 #include <drm/ttm/ttm_bo_driver.h> 48 #include <drm/ttm/ttm_placement.h> 49 #include <drm/ttm/ttm_module.h> 50 51 #include <drm/drm_debugfs.h> 52 #include <drm/amdgpu_drm.h> 53 54 #include "amdgpu.h" 55 #include "amdgpu_object.h" 56 #include "amdgpu_trace.h" 57 #include "amdgpu_amdkfd.h" 58 #include "amdgpu_sdma.h" 59 #include "amdgpu_ras.h" 60 #include "amdgpu_atomfirmware.h" 61 #include "bif/bif_4_1_d.h" 62 63 #define AMDGPU_TTM_VRAM_MAX_DW_READ (size_t)128 64 65 static int amdgpu_ttm_backend_bind(struct ttm_bo_device *bdev, 66 struct ttm_tt *ttm, 67 struct ttm_resource *bo_mem); 68 static void amdgpu_ttm_backend_unbind(struct ttm_bo_device *bdev, 69 struct ttm_tt *ttm); 70 71 static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev, 72 unsigned int type, 73 uint64_t size_in_page) 74 { 75 return ttm_range_man_init(&adev->mman.bdev, type, 76 false, size_in_page); 77 } 78 79 /** 80 * amdgpu_evict_flags - Compute placement flags 81 * 82 * @bo: The buffer object to evict 83 * @placement: Possible destination(s) for evicted BO 84 * 85 * Fill in placement data when ttm_bo_evict() is called 86 */ 87 static void amdgpu_evict_flags(struct ttm_buffer_object *bo, 88 struct ttm_placement *placement) 89 { 90 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 91 struct amdgpu_bo *abo; 92 static const struct ttm_place placements = { 93 .fpfn = 0, 94 .lpfn = 0, 95 .mem_type = TTM_PL_SYSTEM, 96 .flags = 0 97 }; 98 99 /* Don't handle scatter gather BOs */ 100 if (bo->type == ttm_bo_type_sg) { 101 placement->num_placement = 0; 102 placement->num_busy_placement = 0; 103 return; 104 } 105 106 /* Object isn't an AMDGPU object so ignore */ 107 if (!amdgpu_bo_is_amdgpu_bo(bo)) { 108 placement->placement = &placements; 109 placement->busy_placement = &placements; 110 placement->num_placement = 1; 111 placement->num_busy_placement = 1; 112 return; 113 } 114 115 abo = ttm_to_amdgpu_bo(bo); 116 switch (bo->mem.mem_type) { 117 case AMDGPU_PL_GDS: 118 case AMDGPU_PL_GWS: 119 case AMDGPU_PL_OA: 120 placement->num_placement = 0; 121 placement->num_busy_placement = 0; 122 return; 123 124 case TTM_PL_VRAM: 125 if (!adev->mman.buffer_funcs_enabled) { 126 /* Move to system memory */ 127 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU); 128 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) && 129 !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) && 130 amdgpu_bo_in_cpu_visible_vram(abo)) { 131 132 /* Try evicting to the CPU inaccessible part of VRAM 133 * first, but only set GTT as busy placement, so this 134 * BO will be evicted to GTT rather than causing other 135 * BOs to be evicted from VRAM 136 */ 137 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM | 138 AMDGPU_GEM_DOMAIN_GTT); 139 abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT; 140 abo->placements[0].lpfn = 0; 141 abo->placement.busy_placement = &abo->placements[1]; 142 abo->placement.num_busy_placement = 1; 143 } else { 144 /* Move to GTT memory */ 145 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT); 146 } 147 break; 148 case TTM_PL_TT: 149 default: 150 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU); 151 break; 152 } 153 *placement = abo->placement; 154 } 155 156 /** 157 * amdgpu_verify_access - Verify access for a mmap call 158 * 159 * @bo: The buffer object to map 160 * @filp: The file pointer from the process performing the mmap 161 * 162 * This is called by ttm_bo_mmap() to verify whether a process 163 * has the right to mmap a BO to their process space. 164 */ 165 static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp) 166 { 167 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo); 168 169 /* 170 * Don't verify access for KFD BOs. They don't have a GEM 171 * object associated with them. 172 */ 173 if (abo->kfd_bo) 174 return 0; 175 176 if (amdgpu_ttm_tt_get_usermm(bo->ttm)) 177 return -EPERM; 178 return drm_vma_node_verify_access(&abo->tbo.base.vma_node, 179 filp->private_data); 180 } 181 182 /** 183 * amdgpu_mm_node_addr - Compute the GPU relative offset of a GTT buffer. 184 * 185 * @bo: The bo to assign the memory to. 186 * @mm_node: Memory manager node for drm allocator. 187 * @mem: The region where the bo resides. 188 * 189 */ 190 static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo, 191 struct drm_mm_node *mm_node, 192 struct ttm_resource *mem) 193 { 194 uint64_t addr = 0; 195 196 if (mm_node->start != AMDGPU_BO_INVALID_OFFSET) { 197 addr = mm_node->start << PAGE_SHIFT; 198 addr += amdgpu_ttm_domain_start(amdgpu_ttm_adev(bo->bdev), 199 mem->mem_type); 200 } 201 return addr; 202 } 203 204 /** 205 * amdgpu_find_mm_node - Helper function finds the drm_mm_node corresponding to 206 * @offset. It also modifies the offset to be within the drm_mm_node returned 207 * 208 * @mem: The region where the bo resides. 209 * @offset: The offset that drm_mm_node is used for finding. 210 * 211 */ 212 static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_resource *mem, 213 uint64_t *offset) 214 { 215 struct drm_mm_node *mm_node = mem->mm_node; 216 217 while (*offset >= (mm_node->size << PAGE_SHIFT)) { 218 *offset -= (mm_node->size << PAGE_SHIFT); 219 ++mm_node; 220 } 221 return mm_node; 222 } 223 224 /** 225 * amdgpu_ttm_map_buffer - Map memory into the GART windows 226 * @bo: buffer object to map 227 * @mem: memory object to map 228 * @mm_node: drm_mm node object to map 229 * @num_pages: number of pages to map 230 * @offset: offset into @mm_node where to start 231 * @window: which GART window to use 232 * @ring: DMA ring to use for the copy 233 * @tmz: if we should setup a TMZ enabled mapping 234 * @addr: resulting address inside the MC address space 235 * 236 * Setup one of the GART windows to access a specific piece of memory or return 237 * the physical address for local memory. 238 */ 239 static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo, 240 struct ttm_resource *mem, 241 struct drm_mm_node *mm_node, 242 unsigned num_pages, uint64_t offset, 243 unsigned window, struct amdgpu_ring *ring, 244 bool tmz, uint64_t *addr) 245 { 246 struct amdgpu_device *adev = ring->adev; 247 struct amdgpu_job *job; 248 unsigned num_dw, num_bytes; 249 struct dma_fence *fence; 250 uint64_t src_addr, dst_addr; 251 void *cpu_addr; 252 uint64_t flags; 253 unsigned int i; 254 int r; 255 256 BUG_ON(adev->mman.buffer_funcs->copy_max_bytes < 257 AMDGPU_GTT_MAX_TRANSFER_SIZE * 8); 258 259 /* Map only what can't be accessed directly */ 260 if (!tmz && mem->start != AMDGPU_BO_INVALID_OFFSET) { 261 *addr = amdgpu_mm_node_addr(bo, mm_node, mem) + offset; 262 return 0; 263 } 264 265 *addr = adev->gmc.gart_start; 266 *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 267 AMDGPU_GPU_PAGE_SIZE; 268 *addr += offset & ~PAGE_MASK; 269 270 num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8); 271 num_bytes = num_pages * 8; 272 273 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, 274 AMDGPU_IB_POOL_DELAYED, &job); 275 if (r) 276 return r; 277 278 src_addr = num_dw * 4; 279 src_addr += job->ibs[0].gpu_addr; 280 281 dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo); 282 dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8; 283 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, 284 dst_addr, num_bytes, false); 285 286 amdgpu_ring_pad_ib(ring, &job->ibs[0]); 287 WARN_ON(job->ibs[0].length_dw > num_dw); 288 289 flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem); 290 if (tmz) 291 flags |= AMDGPU_PTE_TMZ; 292 293 cpu_addr = &job->ibs[0].ptr[num_dw]; 294 295 if (mem->mem_type == TTM_PL_TT) { 296 dma_addr_t *dma_address; 297 298 dma_address = &bo->ttm->dma_address[offset >> PAGE_SHIFT]; 299 r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags, 300 cpu_addr); 301 if (r) 302 goto error_free; 303 } else { 304 dma_addr_t dma_address; 305 306 dma_address = (mm_node->start << PAGE_SHIFT) + offset; 307 dma_address += adev->vm_manager.vram_base_offset; 308 309 for (i = 0; i < num_pages; ++i) { 310 r = amdgpu_gart_map(adev, i << PAGE_SHIFT, 1, 311 &dma_address, flags, cpu_addr); 312 if (r) 313 goto error_free; 314 315 dma_address += PAGE_SIZE; 316 } 317 } 318 319 r = amdgpu_job_submit(job, &adev->mman.entity, 320 AMDGPU_FENCE_OWNER_UNDEFINED, &fence); 321 if (r) 322 goto error_free; 323 324 dma_fence_put(fence); 325 326 return r; 327 328 error_free: 329 amdgpu_job_free(job); 330 return r; 331 } 332 333 /** 334 * amdgpu_copy_ttm_mem_to_mem - Helper function for copy 335 * @adev: amdgpu device 336 * @src: buffer/address where to read from 337 * @dst: buffer/address where to write to 338 * @size: number of bytes to copy 339 * @tmz: if a secure copy should be used 340 * @resv: resv object to sync to 341 * @f: Returns the last fence if multiple jobs are submitted. 342 * 343 * The function copies @size bytes from {src->mem + src->offset} to 344 * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a 345 * move and different for a BO to BO copy. 346 * 347 */ 348 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev, 349 const struct amdgpu_copy_mem *src, 350 const struct amdgpu_copy_mem *dst, 351 uint64_t size, bool tmz, 352 struct dma_resv *resv, 353 struct dma_fence **f) 354 { 355 const uint32_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE * 356 AMDGPU_GPU_PAGE_SIZE); 357 358 uint64_t src_node_size, dst_node_size, src_offset, dst_offset; 359 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; 360 struct drm_mm_node *src_mm, *dst_mm; 361 struct dma_fence *fence = NULL; 362 int r = 0; 363 364 if (!adev->mman.buffer_funcs_enabled) { 365 DRM_ERROR("Trying to move memory with ring turned off.\n"); 366 return -EINVAL; 367 } 368 369 src_offset = src->offset; 370 if (src->mem->mm_node) { 371 src_mm = amdgpu_find_mm_node(src->mem, &src_offset); 372 src_node_size = (src_mm->size << PAGE_SHIFT) - src_offset; 373 } else { 374 src_mm = NULL; 375 src_node_size = ULLONG_MAX; 376 } 377 378 dst_offset = dst->offset; 379 if (dst->mem->mm_node) { 380 dst_mm = amdgpu_find_mm_node(dst->mem, &dst_offset); 381 dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst_offset; 382 } else { 383 dst_mm = NULL; 384 dst_node_size = ULLONG_MAX; 385 } 386 387 mutex_lock(&adev->mman.gtt_window_lock); 388 389 while (size) { 390 uint32_t src_page_offset = src_offset & ~PAGE_MASK; 391 uint32_t dst_page_offset = dst_offset & ~PAGE_MASK; 392 struct dma_fence *next; 393 uint32_t cur_size; 394 uint64_t from, to; 395 396 /* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst 397 * begins at an offset, then adjust the size accordingly 398 */ 399 cur_size = max(src_page_offset, dst_page_offset); 400 cur_size = min(min3(src_node_size, dst_node_size, size), 401 (uint64_t)(GTT_MAX_BYTES - cur_size)); 402 403 /* Map src to window 0 and dst to window 1. */ 404 r = amdgpu_ttm_map_buffer(src->bo, src->mem, src_mm, 405 PFN_UP(cur_size + src_page_offset), 406 src_offset, 0, ring, tmz, &from); 407 if (r) 408 goto error; 409 410 r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, dst_mm, 411 PFN_UP(cur_size + dst_page_offset), 412 dst_offset, 1, ring, tmz, &to); 413 if (r) 414 goto error; 415 416 r = amdgpu_copy_buffer(ring, from, to, cur_size, 417 resv, &next, false, true, tmz); 418 if (r) 419 goto error; 420 421 dma_fence_put(fence); 422 fence = next; 423 424 size -= cur_size; 425 if (!size) 426 break; 427 428 src_node_size -= cur_size; 429 if (!src_node_size) { 430 ++src_mm; 431 src_node_size = src_mm->size << PAGE_SHIFT; 432 src_offset = 0; 433 } else { 434 src_offset += cur_size; 435 } 436 437 dst_node_size -= cur_size; 438 if (!dst_node_size) { 439 ++dst_mm; 440 dst_node_size = dst_mm->size << PAGE_SHIFT; 441 dst_offset = 0; 442 } else { 443 dst_offset += cur_size; 444 } 445 } 446 error: 447 mutex_unlock(&adev->mman.gtt_window_lock); 448 if (f) 449 *f = dma_fence_get(fence); 450 dma_fence_put(fence); 451 return r; 452 } 453 454 /* 455 * amdgpu_move_blit - Copy an entire buffer to another buffer 456 * 457 * This is a helper called by amdgpu_bo_move() and amdgpu_move_vram_ram() to 458 * help move buffers to and from VRAM. 459 */ 460 static int amdgpu_move_blit(struct ttm_buffer_object *bo, 461 bool evict, 462 struct ttm_resource *new_mem, 463 struct ttm_resource *old_mem) 464 { 465 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 466 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo); 467 struct amdgpu_copy_mem src, dst; 468 struct dma_fence *fence = NULL; 469 int r; 470 471 src.bo = bo; 472 dst.bo = bo; 473 src.mem = old_mem; 474 dst.mem = new_mem; 475 src.offset = 0; 476 dst.offset = 0; 477 478 r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst, 479 new_mem->num_pages << PAGE_SHIFT, 480 amdgpu_bo_encrypted(abo), 481 bo->base.resv, &fence); 482 if (r) 483 goto error; 484 485 /* clear the space being freed */ 486 if (old_mem->mem_type == TTM_PL_VRAM && 487 (abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) { 488 struct dma_fence *wipe_fence = NULL; 489 490 r = amdgpu_fill_buffer(ttm_to_amdgpu_bo(bo), AMDGPU_POISON, 491 NULL, &wipe_fence); 492 if (r) { 493 goto error; 494 } else if (wipe_fence) { 495 dma_fence_put(fence); 496 fence = wipe_fence; 497 } 498 } 499 500 /* Always block for VM page tables before committing the new location */ 501 if (bo->type == ttm_bo_type_kernel) 502 r = ttm_bo_move_accel_cleanup(bo, fence, true, false, new_mem); 503 else 504 r = ttm_bo_move_accel_cleanup(bo, fence, evict, true, new_mem); 505 dma_fence_put(fence); 506 return r; 507 508 error: 509 if (fence) 510 dma_fence_wait(fence, false); 511 dma_fence_put(fence); 512 return r; 513 } 514 515 /** 516 * amdgpu_move_vram_ram - Copy VRAM buffer to RAM buffer 517 * 518 * Called by amdgpu_bo_move(). 519 */ 520 static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo, bool evict, 521 struct ttm_operation_ctx *ctx, 522 struct ttm_resource *new_mem) 523 { 524 struct ttm_resource *old_mem = &bo->mem; 525 struct ttm_resource tmp_mem; 526 struct ttm_place placements; 527 struct ttm_placement placement; 528 int r; 529 530 /* create space/pages for new_mem in GTT space */ 531 tmp_mem = *new_mem; 532 tmp_mem.mm_node = NULL; 533 placement.num_placement = 1; 534 placement.placement = &placements; 535 placement.num_busy_placement = 1; 536 placement.busy_placement = &placements; 537 placements.fpfn = 0; 538 placements.lpfn = 0; 539 placements.mem_type = TTM_PL_TT; 540 placements.flags = 0; 541 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx); 542 if (unlikely(r)) { 543 pr_err("Failed to find GTT space for blit from VRAM\n"); 544 return r; 545 } 546 547 r = ttm_tt_populate(bo->bdev, bo->ttm, ctx); 548 if (unlikely(r)) 549 goto out_cleanup; 550 551 /* Bind the memory to the GTT space */ 552 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, &tmp_mem); 553 if (unlikely(r)) { 554 goto out_cleanup; 555 } 556 557 /* blit VRAM to GTT */ 558 r = amdgpu_move_blit(bo, evict, &tmp_mem, old_mem); 559 if (unlikely(r)) { 560 goto out_cleanup; 561 } 562 563 r = ttm_bo_wait_ctx(bo, ctx); 564 if (unlikely(r)) 565 goto out_cleanup; 566 567 amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm); 568 ttm_resource_free(bo, &bo->mem); 569 ttm_bo_assign_mem(bo, new_mem); 570 out_cleanup: 571 ttm_resource_free(bo, &tmp_mem); 572 return r; 573 } 574 575 /** 576 * amdgpu_move_ram_vram - Copy buffer from RAM to VRAM 577 * 578 * Called by amdgpu_bo_move(). 579 */ 580 static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo, bool evict, 581 struct ttm_operation_ctx *ctx, 582 struct ttm_resource *new_mem) 583 { 584 struct ttm_resource *old_mem = &bo->mem; 585 struct ttm_resource tmp_mem; 586 struct ttm_placement placement; 587 struct ttm_place placements; 588 int r; 589 590 /* make space in GTT for old_mem buffer */ 591 tmp_mem = *new_mem; 592 tmp_mem.mm_node = NULL; 593 placement.num_placement = 1; 594 placement.placement = &placements; 595 placement.num_busy_placement = 1; 596 placement.busy_placement = &placements; 597 placements.fpfn = 0; 598 placements.lpfn = 0; 599 placements.mem_type = TTM_PL_TT; 600 placements.flags = 0; 601 r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx); 602 if (unlikely(r)) { 603 pr_err("Failed to find GTT space for blit to VRAM\n"); 604 return r; 605 } 606 607 /* move/bind old memory to GTT space */ 608 r = ttm_tt_populate(bo->bdev, bo->ttm, ctx); 609 if (unlikely(r)) 610 return r; 611 612 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, &tmp_mem); 613 if (unlikely(r)) { 614 goto out_cleanup; 615 } 616 617 ttm_bo_assign_mem(bo, &tmp_mem); 618 /* copy to VRAM */ 619 r = amdgpu_move_blit(bo, evict, new_mem, old_mem); 620 if (unlikely(r)) { 621 goto out_cleanup; 622 } 623 out_cleanup: 624 ttm_resource_free(bo, &tmp_mem); 625 return r; 626 } 627 628 /* 629 * amdgpu_mem_visible - Check that memory can be accessed by ttm_bo_move_memcpy 630 * 631 * Called by amdgpu_bo_move() 632 */ 633 static bool amdgpu_mem_visible(struct amdgpu_device *adev, 634 struct ttm_resource *mem) 635 { 636 struct drm_mm_node *nodes = mem->mm_node; 637 638 if (mem->mem_type == TTM_PL_SYSTEM || 639 mem->mem_type == TTM_PL_TT) 640 return true; 641 if (mem->mem_type != TTM_PL_VRAM) 642 return false; 643 644 /* ttm_resource_ioremap only supports contiguous memory */ 645 if (nodes->size != mem->num_pages) 646 return false; 647 648 return ((nodes->start + nodes->size) << PAGE_SHIFT) 649 <= adev->gmc.visible_vram_size; 650 } 651 652 /* 653 * amdgpu_bo_move - Move a buffer object to a new memory location 654 * 655 * Called by ttm_bo_handle_move_mem() 656 */ 657 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict, 658 struct ttm_operation_ctx *ctx, 659 struct ttm_resource *new_mem) 660 { 661 struct amdgpu_device *adev; 662 struct amdgpu_bo *abo; 663 struct ttm_resource *old_mem = &bo->mem; 664 int r; 665 666 if (new_mem->mem_type == TTM_PL_TT) { 667 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem); 668 if (r) 669 return r; 670 } 671 672 amdgpu_bo_move_notify(bo, evict, new_mem); 673 674 /* Can't move a pinned BO */ 675 abo = ttm_to_amdgpu_bo(bo); 676 if (WARN_ON_ONCE(abo->tbo.pin_count > 0)) 677 return -EINVAL; 678 679 adev = amdgpu_ttm_adev(bo->bdev); 680 681 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 682 ttm_bo_move_null(bo, new_mem); 683 return 0; 684 } 685 if (old_mem->mem_type == TTM_PL_SYSTEM && 686 new_mem->mem_type == TTM_PL_TT) { 687 ttm_bo_move_null(bo, new_mem); 688 return 0; 689 } 690 691 if (old_mem->mem_type == TTM_PL_TT && 692 new_mem->mem_type == TTM_PL_SYSTEM) { 693 r = ttm_bo_wait_ctx(bo, ctx); 694 if (r) 695 goto fail; 696 697 amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm); 698 ttm_resource_free(bo, &bo->mem); 699 ttm_bo_assign_mem(bo, new_mem); 700 return 0; 701 } 702 703 if (old_mem->mem_type == AMDGPU_PL_GDS || 704 old_mem->mem_type == AMDGPU_PL_GWS || 705 old_mem->mem_type == AMDGPU_PL_OA || 706 new_mem->mem_type == AMDGPU_PL_GDS || 707 new_mem->mem_type == AMDGPU_PL_GWS || 708 new_mem->mem_type == AMDGPU_PL_OA) { 709 /* Nothing to save here */ 710 ttm_bo_move_null(bo, new_mem); 711 return 0; 712 } 713 714 if (!adev->mman.buffer_funcs_enabled) { 715 r = -ENODEV; 716 goto memcpy; 717 } 718 719 if (old_mem->mem_type == TTM_PL_VRAM && 720 new_mem->mem_type == TTM_PL_SYSTEM) { 721 r = amdgpu_move_vram_ram(bo, evict, ctx, new_mem); 722 } else if (old_mem->mem_type == TTM_PL_SYSTEM && 723 new_mem->mem_type == TTM_PL_VRAM) { 724 r = amdgpu_move_ram_vram(bo, evict, ctx, new_mem); 725 } else { 726 r = amdgpu_move_blit(bo, evict, 727 new_mem, old_mem); 728 } 729 730 if (r) { 731 memcpy: 732 /* Check that all memory is CPU accessible */ 733 if (!amdgpu_mem_visible(adev, old_mem) || 734 !amdgpu_mem_visible(adev, new_mem)) { 735 pr_err("Move buffer fallback to memcpy unavailable\n"); 736 goto fail; 737 } 738 739 r = ttm_bo_move_memcpy(bo, ctx, new_mem); 740 if (r) 741 goto fail; 742 } 743 744 if (bo->type == ttm_bo_type_device && 745 new_mem->mem_type == TTM_PL_VRAM && 746 old_mem->mem_type != TTM_PL_VRAM) { 747 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU 748 * accesses the BO after it's moved. 749 */ 750 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; 751 } 752 753 /* update statistics */ 754 atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &adev->num_bytes_moved); 755 return 0; 756 fail: 757 swap(*new_mem, bo->mem); 758 amdgpu_bo_move_notify(bo, false, new_mem); 759 swap(*new_mem, bo->mem); 760 return r; 761 } 762 763 /* 764 * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault 765 * 766 * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault() 767 */ 768 static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_resource *mem) 769 { 770 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev); 771 struct drm_mm_node *mm_node = mem->mm_node; 772 size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT; 773 774 switch (mem->mem_type) { 775 case TTM_PL_SYSTEM: 776 /* system memory */ 777 return 0; 778 case TTM_PL_TT: 779 break; 780 case TTM_PL_VRAM: 781 mem->bus.offset = mem->start << PAGE_SHIFT; 782 /* check if it's visible */ 783 if ((mem->bus.offset + bus_size) > adev->gmc.visible_vram_size) 784 return -EINVAL; 785 /* Only physically contiguous buffers apply. In a contiguous 786 * buffer, size of the first mm_node would match the number of 787 * pages in ttm_resource. 788 */ 789 if (adev->mman.aper_base_kaddr && 790 (mm_node->size == mem->num_pages)) 791 mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr + 792 mem->bus.offset; 793 794 mem->bus.offset += adev->gmc.aper_base; 795 mem->bus.is_iomem = true; 796 mem->bus.caching = ttm_write_combined; 797 break; 798 default: 799 return -EINVAL; 800 } 801 return 0; 802 } 803 804 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo, 805 unsigned long page_offset) 806 { 807 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 808 uint64_t offset = (page_offset << PAGE_SHIFT); 809 struct drm_mm_node *mm; 810 811 mm = amdgpu_find_mm_node(&bo->mem, &offset); 812 offset += adev->gmc.aper_base; 813 return mm->start + (offset >> PAGE_SHIFT); 814 } 815 816 /** 817 * amdgpu_ttm_domain_start - Returns GPU start address 818 * @adev: amdgpu device object 819 * @type: type of the memory 820 * 821 * Returns: 822 * GPU start address of a memory domain 823 */ 824 825 uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type) 826 { 827 switch (type) { 828 case TTM_PL_TT: 829 return adev->gmc.gart_start; 830 case TTM_PL_VRAM: 831 return adev->gmc.vram_start; 832 } 833 834 return 0; 835 } 836 837 /* 838 * TTM backend functions. 839 */ 840 struct amdgpu_ttm_tt { 841 struct ttm_tt ttm; 842 struct drm_gem_object *gobj; 843 u64 offset; 844 uint64_t userptr; 845 struct task_struct *usertask; 846 uint32_t userflags; 847 bool bound; 848 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR) 849 struct hmm_range *range; 850 #endif 851 }; 852 853 #ifdef CONFIG_DRM_AMDGPU_USERPTR 854 /* 855 * amdgpu_ttm_tt_get_user_pages - get device accessible pages that back user 856 * memory and start HMM tracking CPU page table update 857 * 858 * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and only 859 * once afterwards to stop HMM tracking 860 */ 861 int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages) 862 { 863 struct ttm_tt *ttm = bo->tbo.ttm; 864 struct amdgpu_ttm_tt *gtt = (void *)ttm; 865 unsigned long start = gtt->userptr; 866 struct vm_area_struct *vma; 867 struct hmm_range *range; 868 unsigned long timeout; 869 struct mm_struct *mm; 870 unsigned long i; 871 int r = 0; 872 873 mm = bo->notifier.mm; 874 if (unlikely(!mm)) { 875 DRM_DEBUG_DRIVER("BO is not registered?\n"); 876 return -EFAULT; 877 } 878 879 /* Another get_user_pages is running at the same time?? */ 880 if (WARN_ON(gtt->range)) 881 return -EFAULT; 882 883 if (!mmget_not_zero(mm)) /* Happens during process shutdown */ 884 return -ESRCH; 885 886 range = kzalloc(sizeof(*range), GFP_KERNEL); 887 if (unlikely(!range)) { 888 r = -ENOMEM; 889 goto out; 890 } 891 range->notifier = &bo->notifier; 892 range->start = bo->notifier.interval_tree.start; 893 range->end = bo->notifier.interval_tree.last + 1; 894 range->default_flags = HMM_PFN_REQ_FAULT; 895 if (!amdgpu_ttm_tt_is_readonly(ttm)) 896 range->default_flags |= HMM_PFN_REQ_WRITE; 897 898 range->hmm_pfns = kvmalloc_array(ttm->num_pages, 899 sizeof(*range->hmm_pfns), GFP_KERNEL); 900 if (unlikely(!range->hmm_pfns)) { 901 r = -ENOMEM; 902 goto out_free_ranges; 903 } 904 905 mmap_read_lock(mm); 906 vma = find_vma(mm, start); 907 if (unlikely(!vma || start < vma->vm_start)) { 908 r = -EFAULT; 909 goto out_unlock; 910 } 911 if (unlikely((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) && 912 vma->vm_file)) { 913 r = -EPERM; 914 goto out_unlock; 915 } 916 mmap_read_unlock(mm); 917 timeout = jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT); 918 919 retry: 920 range->notifier_seq = mmu_interval_read_begin(&bo->notifier); 921 922 mmap_read_lock(mm); 923 r = hmm_range_fault(range); 924 mmap_read_unlock(mm); 925 if (unlikely(r)) { 926 /* 927 * FIXME: This timeout should encompass the retry from 928 * mmu_interval_read_retry() as well. 929 */ 930 if (r == -EBUSY && !time_after(jiffies, timeout)) 931 goto retry; 932 goto out_free_pfns; 933 } 934 935 /* 936 * Due to default_flags, all pages are HMM_PFN_VALID or 937 * hmm_range_fault() fails. FIXME: The pages cannot be touched outside 938 * the notifier_lock, and mmu_interval_read_retry() must be done first. 939 */ 940 for (i = 0; i < ttm->num_pages; i++) 941 pages[i] = hmm_pfn_to_page(range->hmm_pfns[i]); 942 943 gtt->range = range; 944 mmput(mm); 945 946 return 0; 947 948 out_unlock: 949 mmap_read_unlock(mm); 950 out_free_pfns: 951 kvfree(range->hmm_pfns); 952 out_free_ranges: 953 kfree(range); 954 out: 955 mmput(mm); 956 return r; 957 } 958 959 /* 960 * amdgpu_ttm_tt_userptr_range_done - stop HMM track the CPU page table change 961 * Check if the pages backing this ttm range have been invalidated 962 * 963 * Returns: true if pages are still valid 964 */ 965 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm) 966 { 967 struct amdgpu_ttm_tt *gtt = (void *)ttm; 968 bool r = false; 969 970 if (!gtt || !gtt->userptr) 971 return false; 972 973 DRM_DEBUG_DRIVER("user_pages_done 0x%llx pages 0x%x\n", 974 gtt->userptr, ttm->num_pages); 975 976 WARN_ONCE(!gtt->range || !gtt->range->hmm_pfns, 977 "No user pages to check\n"); 978 979 if (gtt->range) { 980 /* 981 * FIXME: Must always hold notifier_lock for this, and must 982 * not ignore the return code. 983 */ 984 r = mmu_interval_read_retry(gtt->range->notifier, 985 gtt->range->notifier_seq); 986 kvfree(gtt->range->hmm_pfns); 987 kfree(gtt->range); 988 gtt->range = NULL; 989 } 990 991 return !r; 992 } 993 #endif 994 995 /* 996 * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary. 997 * 998 * Called by amdgpu_cs_list_validate(). This creates the page list 999 * that backs user memory and will ultimately be mapped into the device 1000 * address space. 1001 */ 1002 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages) 1003 { 1004 unsigned long i; 1005 1006 for (i = 0; i < ttm->num_pages; ++i) 1007 ttm->pages[i] = pages ? pages[i] : NULL; 1008 } 1009 1010 /* 1011 * amdgpu_ttm_tt_pin_userptr - prepare the sg table with the user pages 1012 * 1013 * Called by amdgpu_ttm_backend_bind() 1014 **/ 1015 static int amdgpu_ttm_tt_pin_userptr(struct ttm_bo_device *bdev, 1016 struct ttm_tt *ttm) 1017 { 1018 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev); 1019 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1020 int r; 1021 1022 int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY); 1023 enum dma_data_direction direction = write ? 1024 DMA_BIDIRECTIONAL : DMA_TO_DEVICE; 1025 1026 /* Allocate an SG array and squash pages into it */ 1027 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0, 1028 ttm->num_pages << PAGE_SHIFT, 1029 GFP_KERNEL); 1030 if (r) 1031 goto release_sg; 1032 1033 /* Map SG to device */ 1034 r = dma_map_sgtable(adev->dev, ttm->sg, direction, 0); 1035 if (r) 1036 goto release_sg; 1037 1038 /* convert SG to linear array of pages and dma addresses */ 1039 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages, 1040 gtt->ttm.dma_address, ttm->num_pages); 1041 1042 return 0; 1043 1044 release_sg: 1045 kfree(ttm->sg); 1046 ttm->sg = NULL; 1047 return r; 1048 } 1049 1050 /* 1051 * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages 1052 */ 1053 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_bo_device *bdev, 1054 struct ttm_tt *ttm) 1055 { 1056 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev); 1057 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1058 1059 int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY); 1060 enum dma_data_direction direction = write ? 1061 DMA_BIDIRECTIONAL : DMA_TO_DEVICE; 1062 1063 /* double check that we don't free the table twice */ 1064 if (!ttm->sg->sgl) 1065 return; 1066 1067 /* unmap the pages mapped to the device */ 1068 dma_unmap_sgtable(adev->dev, ttm->sg, direction, 0); 1069 sg_free_table(ttm->sg); 1070 1071 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR) 1072 if (gtt->range) { 1073 unsigned long i; 1074 1075 for (i = 0; i < ttm->num_pages; i++) { 1076 if (ttm->pages[i] != 1077 hmm_pfn_to_page(gtt->range->hmm_pfns[i])) 1078 break; 1079 } 1080 1081 WARN((i == ttm->num_pages), "Missing get_user_page_done\n"); 1082 } 1083 #endif 1084 } 1085 1086 static int amdgpu_ttm_gart_bind(struct amdgpu_device *adev, 1087 struct ttm_buffer_object *tbo, 1088 uint64_t flags) 1089 { 1090 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo); 1091 struct ttm_tt *ttm = tbo->ttm; 1092 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1093 int r; 1094 1095 if (amdgpu_bo_encrypted(abo)) 1096 flags |= AMDGPU_PTE_TMZ; 1097 1098 if (abo->flags & AMDGPU_GEM_CREATE_CP_MQD_GFX9) { 1099 uint64_t page_idx = 1; 1100 1101 r = amdgpu_gart_bind(adev, gtt->offset, page_idx, 1102 ttm->pages, gtt->ttm.dma_address, flags); 1103 if (r) 1104 goto gart_bind_fail; 1105 1106 /* The memory type of the first page defaults to UC. Now 1107 * modify the memory type to NC from the second page of 1108 * the BO onward. 1109 */ 1110 flags &= ~AMDGPU_PTE_MTYPE_VG10_MASK; 1111 flags |= AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_NC); 1112 1113 r = amdgpu_gart_bind(adev, 1114 gtt->offset + (page_idx << PAGE_SHIFT), 1115 ttm->num_pages - page_idx, 1116 &ttm->pages[page_idx], 1117 &(gtt->ttm.dma_address[page_idx]), flags); 1118 } else { 1119 r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages, 1120 ttm->pages, gtt->ttm.dma_address, flags); 1121 } 1122 1123 gart_bind_fail: 1124 if (r) 1125 DRM_ERROR("failed to bind %u pages at 0x%08llX\n", 1126 ttm->num_pages, gtt->offset); 1127 1128 return r; 1129 } 1130 1131 /* 1132 * amdgpu_ttm_backend_bind - Bind GTT memory 1133 * 1134 * Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem(). 1135 * This handles binding GTT memory to the device address space. 1136 */ 1137 static int amdgpu_ttm_backend_bind(struct ttm_bo_device *bdev, 1138 struct ttm_tt *ttm, 1139 struct ttm_resource *bo_mem) 1140 { 1141 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev); 1142 struct amdgpu_ttm_tt *gtt = (void*)ttm; 1143 uint64_t flags; 1144 int r = 0; 1145 1146 if (!bo_mem) 1147 return -EINVAL; 1148 1149 if (gtt->bound) 1150 return 0; 1151 1152 if (gtt->userptr) { 1153 r = amdgpu_ttm_tt_pin_userptr(bdev, ttm); 1154 if (r) { 1155 DRM_ERROR("failed to pin userptr\n"); 1156 return r; 1157 } 1158 } 1159 if (!ttm->num_pages) { 1160 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n", 1161 ttm->num_pages, bo_mem, ttm); 1162 } 1163 1164 if (bo_mem->mem_type == AMDGPU_PL_GDS || 1165 bo_mem->mem_type == AMDGPU_PL_GWS || 1166 bo_mem->mem_type == AMDGPU_PL_OA) 1167 return -EINVAL; 1168 1169 if (!amdgpu_gtt_mgr_has_gart_addr(bo_mem)) { 1170 gtt->offset = AMDGPU_BO_INVALID_OFFSET; 1171 return 0; 1172 } 1173 1174 /* compute PTE flags relevant to this BO memory */ 1175 flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem); 1176 1177 /* bind pages into GART page tables */ 1178 gtt->offset = (u64)bo_mem->start << PAGE_SHIFT; 1179 r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages, 1180 ttm->pages, gtt->ttm.dma_address, flags); 1181 1182 if (r) 1183 DRM_ERROR("failed to bind %u pages at 0x%08llX\n", 1184 ttm->num_pages, gtt->offset); 1185 gtt->bound = true; 1186 return r; 1187 } 1188 1189 /* 1190 * amdgpu_ttm_alloc_gart - Make sure buffer object is accessible either 1191 * through AGP or GART aperture. 1192 * 1193 * If bo is accessible through AGP aperture, then use AGP aperture 1194 * to access bo; otherwise allocate logical space in GART aperture 1195 * and map bo to GART aperture. 1196 */ 1197 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo) 1198 { 1199 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 1200 struct ttm_operation_ctx ctx = { false, false }; 1201 struct amdgpu_ttm_tt *gtt = (void *)bo->ttm; 1202 struct ttm_resource tmp; 1203 struct ttm_placement placement; 1204 struct ttm_place placements; 1205 uint64_t addr, flags; 1206 int r; 1207 1208 if (bo->mem.start != AMDGPU_BO_INVALID_OFFSET) 1209 return 0; 1210 1211 addr = amdgpu_gmc_agp_addr(bo); 1212 if (addr != AMDGPU_BO_INVALID_OFFSET) { 1213 bo->mem.start = addr >> PAGE_SHIFT; 1214 } else { 1215 1216 /* allocate GART space */ 1217 tmp = bo->mem; 1218 tmp.mm_node = NULL; 1219 placement.num_placement = 1; 1220 placement.placement = &placements; 1221 placement.num_busy_placement = 1; 1222 placement.busy_placement = &placements; 1223 placements.fpfn = 0; 1224 placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT; 1225 placements.mem_type = TTM_PL_TT; 1226 placements.flags = bo->mem.placement; 1227 1228 r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx); 1229 if (unlikely(r)) 1230 return r; 1231 1232 /* compute PTE flags for this buffer object */ 1233 flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, &tmp); 1234 1235 /* Bind pages */ 1236 gtt->offset = (u64)tmp.start << PAGE_SHIFT; 1237 r = amdgpu_ttm_gart_bind(adev, bo, flags); 1238 if (unlikely(r)) { 1239 ttm_resource_free(bo, &tmp); 1240 return r; 1241 } 1242 1243 ttm_resource_free(bo, &bo->mem); 1244 bo->mem = tmp; 1245 } 1246 1247 return 0; 1248 } 1249 1250 /* 1251 * amdgpu_ttm_recover_gart - Rebind GTT pages 1252 * 1253 * Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to 1254 * rebind GTT pages during a GPU reset. 1255 */ 1256 int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo) 1257 { 1258 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev); 1259 uint64_t flags; 1260 int r; 1261 1262 if (!tbo->ttm) 1263 return 0; 1264 1265 flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, &tbo->mem); 1266 r = amdgpu_ttm_gart_bind(adev, tbo, flags); 1267 1268 return r; 1269 } 1270 1271 /* 1272 * amdgpu_ttm_backend_unbind - Unbind GTT mapped pages 1273 * 1274 * Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and 1275 * ttm_tt_destroy(). 1276 */ 1277 static void amdgpu_ttm_backend_unbind(struct ttm_bo_device *bdev, 1278 struct ttm_tt *ttm) 1279 { 1280 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev); 1281 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1282 int r; 1283 1284 if (!gtt->bound) 1285 return; 1286 1287 /* if the pages have userptr pinning then clear that first */ 1288 if (gtt->userptr) 1289 amdgpu_ttm_tt_unpin_userptr(bdev, ttm); 1290 1291 if (gtt->offset == AMDGPU_BO_INVALID_OFFSET) 1292 return; 1293 1294 /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */ 1295 r = amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages); 1296 if (r) 1297 DRM_ERROR("failed to unbind %u pages at 0x%08llX\n", 1298 gtt->ttm.num_pages, gtt->offset); 1299 gtt->bound = false; 1300 } 1301 1302 static void amdgpu_ttm_backend_destroy(struct ttm_bo_device *bdev, 1303 struct ttm_tt *ttm) 1304 { 1305 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1306 1307 amdgpu_ttm_backend_unbind(bdev, ttm); 1308 ttm_tt_destroy_common(bdev, ttm); 1309 if (gtt->usertask) 1310 put_task_struct(gtt->usertask); 1311 1312 ttm_tt_fini(>t->ttm); 1313 kfree(gtt); 1314 } 1315 1316 /** 1317 * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO 1318 * 1319 * @bo: The buffer object to create a GTT ttm_tt object around 1320 * 1321 * Called by ttm_tt_create(). 1322 */ 1323 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo, 1324 uint32_t page_flags) 1325 { 1326 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo); 1327 struct amdgpu_ttm_tt *gtt; 1328 enum ttm_caching caching; 1329 1330 gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL); 1331 if (gtt == NULL) { 1332 return NULL; 1333 } 1334 gtt->gobj = &bo->base; 1335 1336 if (abo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) 1337 caching = ttm_write_combined; 1338 else 1339 caching = ttm_cached; 1340 1341 /* allocate space for the uninitialized page entries */ 1342 if (ttm_sg_tt_init(>t->ttm, bo, page_flags, caching)) { 1343 kfree(gtt); 1344 return NULL; 1345 } 1346 return >t->ttm; 1347 } 1348 1349 /* 1350 * amdgpu_ttm_tt_populate - Map GTT pages visible to the device 1351 * 1352 * Map the pages of a ttm_tt object to an address space visible 1353 * to the underlying device. 1354 */ 1355 static int amdgpu_ttm_tt_populate(struct ttm_bo_device *bdev, 1356 struct ttm_tt *ttm, 1357 struct ttm_operation_ctx *ctx) 1358 { 1359 struct amdgpu_device *adev = amdgpu_ttm_adev(bdev); 1360 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1361 1362 /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */ 1363 if (gtt && gtt->userptr) { 1364 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL); 1365 if (!ttm->sg) 1366 return -ENOMEM; 1367 1368 ttm->page_flags |= TTM_PAGE_FLAG_SG; 1369 return 0; 1370 } 1371 1372 if (ttm->page_flags & TTM_PAGE_FLAG_SG) { 1373 if (!ttm->sg) { 1374 struct dma_buf_attachment *attach; 1375 struct sg_table *sgt; 1376 1377 attach = gtt->gobj->import_attach; 1378 sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); 1379 if (IS_ERR(sgt)) 1380 return PTR_ERR(sgt); 1381 1382 ttm->sg = sgt; 1383 } 1384 1385 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages, 1386 gtt->ttm.dma_address, 1387 ttm->num_pages); 1388 return 0; 1389 } 1390 1391 return ttm_pool_alloc(&adev->mman.bdev.pool, ttm, ctx); 1392 } 1393 1394 /* 1395 * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays 1396 * 1397 * Unmaps pages of a ttm_tt object from the device address space and 1398 * unpopulates the page array backing it. 1399 */ 1400 static void amdgpu_ttm_tt_unpopulate(struct ttm_bo_device *bdev, 1401 struct ttm_tt *ttm) 1402 { 1403 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1404 struct amdgpu_device *adev; 1405 1406 if (gtt && gtt->userptr) { 1407 amdgpu_ttm_tt_set_user_pages(ttm, NULL); 1408 kfree(ttm->sg); 1409 ttm->page_flags &= ~TTM_PAGE_FLAG_SG; 1410 return; 1411 } 1412 1413 if (ttm->sg && gtt->gobj->import_attach) { 1414 struct dma_buf_attachment *attach; 1415 1416 attach = gtt->gobj->import_attach; 1417 dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL); 1418 ttm->sg = NULL; 1419 return; 1420 } 1421 1422 if (ttm->page_flags & TTM_PAGE_FLAG_SG) 1423 return; 1424 1425 adev = amdgpu_ttm_adev(bdev); 1426 return ttm_pool_free(&adev->mman.bdev.pool, ttm); 1427 } 1428 1429 /** 1430 * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current 1431 * task 1432 * 1433 * @bo: The ttm_buffer_object to bind this userptr to 1434 * @addr: The address in the current tasks VM space to use 1435 * @flags: Requirements of userptr object. 1436 * 1437 * Called by amdgpu_gem_userptr_ioctl() to bind userptr pages 1438 * to current task 1439 */ 1440 int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo, 1441 uint64_t addr, uint32_t flags) 1442 { 1443 struct amdgpu_ttm_tt *gtt; 1444 1445 if (!bo->ttm) { 1446 /* TODO: We want a separate TTM object type for userptrs */ 1447 bo->ttm = amdgpu_ttm_tt_create(bo, 0); 1448 if (bo->ttm == NULL) 1449 return -ENOMEM; 1450 } 1451 1452 gtt = (void *)bo->ttm; 1453 gtt->userptr = addr; 1454 gtt->userflags = flags; 1455 1456 if (gtt->usertask) 1457 put_task_struct(gtt->usertask); 1458 gtt->usertask = current->group_leader; 1459 get_task_struct(gtt->usertask); 1460 1461 return 0; 1462 } 1463 1464 /* 1465 * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object 1466 */ 1467 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm) 1468 { 1469 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1470 1471 if (gtt == NULL) 1472 return NULL; 1473 1474 if (gtt->usertask == NULL) 1475 return NULL; 1476 1477 return gtt->usertask->mm; 1478 } 1479 1480 /* 1481 * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an 1482 * address range for the current task. 1483 * 1484 */ 1485 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start, 1486 unsigned long end) 1487 { 1488 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1489 unsigned long size; 1490 1491 if (gtt == NULL || !gtt->userptr) 1492 return false; 1493 1494 /* Return false if no part of the ttm_tt object lies within 1495 * the range 1496 */ 1497 size = (unsigned long)gtt->ttm.num_pages * PAGE_SIZE; 1498 if (gtt->userptr > end || gtt->userptr + size <= start) 1499 return false; 1500 1501 return true; 1502 } 1503 1504 /* 1505 * amdgpu_ttm_tt_is_userptr - Have the pages backing by userptr? 1506 */ 1507 bool amdgpu_ttm_tt_is_userptr(struct ttm_tt *ttm) 1508 { 1509 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1510 1511 if (gtt == NULL || !gtt->userptr) 1512 return false; 1513 1514 return true; 1515 } 1516 1517 /* 1518 * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only? 1519 */ 1520 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm) 1521 { 1522 struct amdgpu_ttm_tt *gtt = (void *)ttm; 1523 1524 if (gtt == NULL) 1525 return false; 1526 1527 return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY); 1528 } 1529 1530 /** 1531 * amdgpu_ttm_tt_pde_flags - Compute PDE flags for ttm_tt object 1532 * 1533 * @ttm: The ttm_tt object to compute the flags for 1534 * @mem: The memory registry backing this ttm_tt object 1535 * 1536 * Figure out the flags to use for a VM PDE (Page Directory Entry). 1537 */ 1538 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem) 1539 { 1540 uint64_t flags = 0; 1541 1542 if (mem && mem->mem_type != TTM_PL_SYSTEM) 1543 flags |= AMDGPU_PTE_VALID; 1544 1545 if (mem && mem->mem_type == TTM_PL_TT) { 1546 flags |= AMDGPU_PTE_SYSTEM; 1547 1548 if (ttm->caching == ttm_cached) 1549 flags |= AMDGPU_PTE_SNOOPED; 1550 } 1551 1552 return flags; 1553 } 1554 1555 /** 1556 * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object 1557 * 1558 * @adev: amdgpu_device pointer 1559 * @ttm: The ttm_tt object to compute the flags for 1560 * @mem: The memory registry backing this ttm_tt object 1561 * 1562 * Figure out the flags to use for a VM PTE (Page Table Entry). 1563 */ 1564 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm, 1565 struct ttm_resource *mem) 1566 { 1567 uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem); 1568 1569 flags |= adev->gart.gart_pte_flags; 1570 flags |= AMDGPU_PTE_READABLE; 1571 1572 if (!amdgpu_ttm_tt_is_readonly(ttm)) 1573 flags |= AMDGPU_PTE_WRITEABLE; 1574 1575 return flags; 1576 } 1577 1578 /* 1579 * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer 1580 * object. 1581 * 1582 * Return true if eviction is sensible. Called by ttm_mem_evict_first() on 1583 * behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until 1584 * it can find space for a new object and by ttm_bo_force_list_clean() which is 1585 * used to clean out a memory space. 1586 */ 1587 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo, 1588 const struct ttm_place *place) 1589 { 1590 unsigned long num_pages = bo->mem.num_pages; 1591 struct drm_mm_node *node = bo->mem.mm_node; 1592 struct dma_resv_list *flist; 1593 struct dma_fence *f; 1594 int i; 1595 1596 if (bo->type == ttm_bo_type_kernel && 1597 !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo))) 1598 return false; 1599 1600 /* If bo is a KFD BO, check if the bo belongs to the current process. 1601 * If true, then return false as any KFD process needs all its BOs to 1602 * be resident to run successfully 1603 */ 1604 flist = dma_resv_get_list(bo->base.resv); 1605 if (flist) { 1606 for (i = 0; i < flist->shared_count; ++i) { 1607 f = rcu_dereference_protected(flist->shared[i], 1608 dma_resv_held(bo->base.resv)); 1609 if (amdkfd_fence_check_mm(f, current->mm)) 1610 return false; 1611 } 1612 } 1613 1614 switch (bo->mem.mem_type) { 1615 case TTM_PL_TT: 1616 if (amdgpu_bo_is_amdgpu_bo(bo) && 1617 amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo))) 1618 return false; 1619 return true; 1620 1621 case TTM_PL_VRAM: 1622 /* Check each drm MM node individually */ 1623 while (num_pages) { 1624 if (place->fpfn < (node->start + node->size) && 1625 !(place->lpfn && place->lpfn <= node->start)) 1626 return true; 1627 1628 num_pages -= node->size; 1629 ++node; 1630 } 1631 return false; 1632 1633 default: 1634 break; 1635 } 1636 1637 return ttm_bo_eviction_valuable(bo, place); 1638 } 1639 1640 /** 1641 * amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object. 1642 * 1643 * @bo: The buffer object to read/write 1644 * @offset: Offset into buffer object 1645 * @buf: Secondary buffer to write/read from 1646 * @len: Length in bytes of access 1647 * @write: true if writing 1648 * 1649 * This is used to access VRAM that backs a buffer object via MMIO 1650 * access for debugging purposes. 1651 */ 1652 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo, 1653 unsigned long offset, 1654 void *buf, int len, int write) 1655 { 1656 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo); 1657 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev); 1658 struct drm_mm_node *nodes; 1659 uint32_t value = 0; 1660 int ret = 0; 1661 uint64_t pos; 1662 unsigned long flags; 1663 1664 if (bo->mem.mem_type != TTM_PL_VRAM) 1665 return -EIO; 1666 1667 pos = offset; 1668 nodes = amdgpu_find_mm_node(&abo->tbo.mem, &pos); 1669 pos += (nodes->start << PAGE_SHIFT); 1670 1671 while (len && pos < adev->gmc.mc_vram_size) { 1672 uint64_t aligned_pos = pos & ~(uint64_t)3; 1673 uint64_t bytes = 4 - (pos & 3); 1674 uint32_t shift = (pos & 3) * 8; 1675 uint32_t mask = 0xffffffff << shift; 1676 1677 if (len < bytes) { 1678 mask &= 0xffffffff >> (bytes - len) * 8; 1679 bytes = len; 1680 } 1681 1682 if (mask != 0xffffffff) { 1683 spin_lock_irqsave(&adev->mmio_idx_lock, flags); 1684 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)aligned_pos) | 0x80000000); 1685 WREG32_NO_KIQ(mmMM_INDEX_HI, aligned_pos >> 31); 1686 if (!write || mask != 0xffffffff) 1687 value = RREG32_NO_KIQ(mmMM_DATA); 1688 if (write) { 1689 value &= ~mask; 1690 value |= (*(uint32_t *)buf << shift) & mask; 1691 WREG32_NO_KIQ(mmMM_DATA, value); 1692 } 1693 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); 1694 if (!write) { 1695 value = (value & mask) >> shift; 1696 memcpy(buf, &value, bytes); 1697 } 1698 } else { 1699 bytes = (nodes->start + nodes->size) << PAGE_SHIFT; 1700 bytes = min(bytes - pos, (uint64_t)len & ~0x3ull); 1701 1702 amdgpu_device_vram_access(adev, pos, (uint32_t *)buf, 1703 bytes, write); 1704 } 1705 1706 ret += bytes; 1707 buf = (uint8_t *)buf + bytes; 1708 pos += bytes; 1709 len -= bytes; 1710 if (pos >= (nodes->start + nodes->size) << PAGE_SHIFT) { 1711 ++nodes; 1712 pos = (nodes->start << PAGE_SHIFT); 1713 } 1714 } 1715 1716 return ret; 1717 } 1718 1719 static void 1720 amdgpu_bo_delete_mem_notify(struct ttm_buffer_object *bo) 1721 { 1722 amdgpu_bo_move_notify(bo, false, NULL); 1723 } 1724 1725 static struct ttm_bo_driver amdgpu_bo_driver = { 1726 .ttm_tt_create = &amdgpu_ttm_tt_create, 1727 .ttm_tt_populate = &amdgpu_ttm_tt_populate, 1728 .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate, 1729 .ttm_tt_destroy = &amdgpu_ttm_backend_destroy, 1730 .eviction_valuable = amdgpu_ttm_bo_eviction_valuable, 1731 .evict_flags = &amdgpu_evict_flags, 1732 .move = &amdgpu_bo_move, 1733 .verify_access = &amdgpu_verify_access, 1734 .delete_mem_notify = &amdgpu_bo_delete_mem_notify, 1735 .release_notify = &amdgpu_bo_release_notify, 1736 .io_mem_reserve = &amdgpu_ttm_io_mem_reserve, 1737 .io_mem_pfn = amdgpu_ttm_io_mem_pfn, 1738 .access_memory = &amdgpu_ttm_access_memory, 1739 .del_from_lru_notify = &amdgpu_vm_del_from_lru_notify 1740 }; 1741 1742 /* 1743 * Firmware Reservation functions 1744 */ 1745 /** 1746 * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram 1747 * 1748 * @adev: amdgpu_device pointer 1749 * 1750 * free fw reserved vram if it has been reserved. 1751 */ 1752 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev) 1753 { 1754 amdgpu_bo_free_kernel(&adev->mman.fw_vram_usage_reserved_bo, 1755 NULL, &adev->mman.fw_vram_usage_va); 1756 } 1757 1758 /** 1759 * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw 1760 * 1761 * @adev: amdgpu_device pointer 1762 * 1763 * create bo vram reservation from fw. 1764 */ 1765 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev) 1766 { 1767 uint64_t vram_size = adev->gmc.visible_vram_size; 1768 1769 adev->mman.fw_vram_usage_va = NULL; 1770 adev->mman.fw_vram_usage_reserved_bo = NULL; 1771 1772 if (adev->mman.fw_vram_usage_size == 0 || 1773 adev->mman.fw_vram_usage_size > vram_size) 1774 return 0; 1775 1776 return amdgpu_bo_create_kernel_at(adev, 1777 adev->mman.fw_vram_usage_start_offset, 1778 adev->mman.fw_vram_usage_size, 1779 AMDGPU_GEM_DOMAIN_VRAM, 1780 &adev->mman.fw_vram_usage_reserved_bo, 1781 &adev->mman.fw_vram_usage_va); 1782 } 1783 1784 /* 1785 * Memoy training reservation functions 1786 */ 1787 1788 /** 1789 * amdgpu_ttm_training_reserve_vram_fini - free memory training reserved vram 1790 * 1791 * @adev: amdgpu_device pointer 1792 * 1793 * free memory training reserved vram if it has been reserved. 1794 */ 1795 static int amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device *adev) 1796 { 1797 struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx; 1798 1799 ctx->init = PSP_MEM_TRAIN_NOT_SUPPORT; 1800 amdgpu_bo_free_kernel(&ctx->c2p_bo, NULL, NULL); 1801 ctx->c2p_bo = NULL; 1802 1803 return 0; 1804 } 1805 1806 static void amdgpu_ttm_training_data_block_init(struct amdgpu_device *adev) 1807 { 1808 struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx; 1809 1810 memset(ctx, 0, sizeof(*ctx)); 1811 1812 ctx->c2p_train_data_offset = 1813 ALIGN((adev->gmc.mc_vram_size - adev->mman.discovery_tmr_size - SZ_1M), SZ_1M); 1814 ctx->p2c_train_data_offset = 1815 (adev->gmc.mc_vram_size - GDDR6_MEM_TRAINING_OFFSET); 1816 ctx->train_data_size = 1817 GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES; 1818 1819 DRM_DEBUG("train_data_size:%llx,p2c_train_data_offset:%llx,c2p_train_data_offset:%llx.\n", 1820 ctx->train_data_size, 1821 ctx->p2c_train_data_offset, 1822 ctx->c2p_train_data_offset); 1823 } 1824 1825 /* 1826 * reserve TMR memory at the top of VRAM which holds 1827 * IP Discovery data and is protected by PSP. 1828 */ 1829 static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev) 1830 { 1831 int ret; 1832 struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx; 1833 bool mem_train_support = false; 1834 1835 if (!amdgpu_sriov_vf(adev)) { 1836 ret = amdgpu_mem_train_support(adev); 1837 if (ret == 1) 1838 mem_train_support = true; 1839 else if (ret == -1) 1840 return -EINVAL; 1841 else 1842 DRM_DEBUG("memory training does not support!\n"); 1843 } 1844 1845 /* 1846 * Query reserved tmr size through atom firmwareinfo for Sienna_Cichlid and onwards for all 1847 * the use cases (IP discovery/G6 memory training/profiling/diagnostic data.etc) 1848 * 1849 * Otherwise, fallback to legacy approach to check and reserve tmr block for ip 1850 * discovery data and G6 memory training data respectively 1851 */ 1852 adev->mman.discovery_tmr_size = 1853 amdgpu_atomfirmware_get_fw_reserved_fb_size(adev); 1854 if (!adev->mman.discovery_tmr_size) 1855 adev->mman.discovery_tmr_size = DISCOVERY_TMR_OFFSET; 1856 1857 if (mem_train_support) { 1858 /* reserve vram for mem train according to TMR location */ 1859 amdgpu_ttm_training_data_block_init(adev); 1860 ret = amdgpu_bo_create_kernel_at(adev, 1861 ctx->c2p_train_data_offset, 1862 ctx->train_data_size, 1863 AMDGPU_GEM_DOMAIN_VRAM, 1864 &ctx->c2p_bo, 1865 NULL); 1866 if (ret) { 1867 DRM_ERROR("alloc c2p_bo failed(%d)!\n", ret); 1868 amdgpu_ttm_training_reserve_vram_fini(adev); 1869 return ret; 1870 } 1871 ctx->init = PSP_MEM_TRAIN_RESERVE_SUCCESS; 1872 } 1873 1874 ret = amdgpu_bo_create_kernel_at(adev, 1875 adev->gmc.real_vram_size - adev->mman.discovery_tmr_size, 1876 adev->mman.discovery_tmr_size, 1877 AMDGPU_GEM_DOMAIN_VRAM, 1878 &adev->mman.discovery_memory, 1879 NULL); 1880 if (ret) { 1881 DRM_ERROR("alloc tmr failed(%d)!\n", ret); 1882 amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL); 1883 return ret; 1884 } 1885 1886 return 0; 1887 } 1888 1889 /* 1890 * amdgpu_ttm_init - Init the memory management (ttm) as well as various 1891 * gtt/vram related fields. 1892 * 1893 * This initializes all of the memory space pools that the TTM layer 1894 * will need such as the GTT space (system memory mapped to the device), 1895 * VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which 1896 * can be mapped per VMID. 1897 */ 1898 int amdgpu_ttm_init(struct amdgpu_device *adev) 1899 { 1900 uint64_t gtt_size; 1901 int r; 1902 u64 vis_vram_limit; 1903 1904 mutex_init(&adev->mman.gtt_window_lock); 1905 1906 /* No others user of address space so set it to 0 */ 1907 r = ttm_bo_device_init(&adev->mman.bdev, &amdgpu_bo_driver, adev->dev, 1908 adev_to_drm(adev)->anon_inode->i_mapping, 1909 adev_to_drm(adev)->vma_offset_manager, 1910 adev->need_swiotlb, 1911 dma_addressing_limited(adev->dev)); 1912 if (r) { 1913 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 1914 return r; 1915 } 1916 adev->mman.initialized = true; 1917 1918 /* Initialize VRAM pool with all of VRAM divided into pages */ 1919 r = amdgpu_vram_mgr_init(adev); 1920 if (r) { 1921 DRM_ERROR("Failed initializing VRAM heap.\n"); 1922 return r; 1923 } 1924 1925 /* Reduce size of CPU-visible VRAM if requested */ 1926 vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024; 1927 if (amdgpu_vis_vram_limit > 0 && 1928 vis_vram_limit <= adev->gmc.visible_vram_size) 1929 adev->gmc.visible_vram_size = vis_vram_limit; 1930 1931 /* Change the size here instead of the init above so only lpfn is affected */ 1932 amdgpu_ttm_set_buffer_funcs_status(adev, false); 1933 #ifdef CONFIG_64BIT 1934 adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base, 1935 adev->gmc.visible_vram_size); 1936 #endif 1937 1938 /* 1939 *The reserved vram for firmware must be pinned to the specified 1940 *place on the VRAM, so reserve it early. 1941 */ 1942 r = amdgpu_ttm_fw_reserve_vram_init(adev); 1943 if (r) { 1944 return r; 1945 } 1946 1947 /* 1948 * only NAVI10 and onwards ASIC support for IP discovery. 1949 * If IP discovery enabled, a block of memory should be 1950 * reserved for IP discovey. 1951 */ 1952 if (adev->mman.discovery_bin) { 1953 r = amdgpu_ttm_reserve_tmr(adev); 1954 if (r) 1955 return r; 1956 } 1957 1958 /* allocate memory as required for VGA 1959 * This is used for VGA emulation and pre-OS scanout buffers to 1960 * avoid display artifacts while transitioning between pre-OS 1961 * and driver. */ 1962 r = amdgpu_bo_create_kernel_at(adev, 0, adev->mman.stolen_vga_size, 1963 AMDGPU_GEM_DOMAIN_VRAM, 1964 &adev->mman.stolen_vga_memory, 1965 NULL); 1966 if (r) 1967 return r; 1968 r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_vga_size, 1969 adev->mman.stolen_extended_size, 1970 AMDGPU_GEM_DOMAIN_VRAM, 1971 &adev->mman.stolen_extended_memory, 1972 NULL); 1973 if (r) 1974 return r; 1975 1976 DRM_INFO("amdgpu: %uM of VRAM memory ready\n", 1977 (unsigned) (adev->gmc.real_vram_size / (1024 * 1024))); 1978 1979 /* Compute GTT size, either bsaed on 3/4th the size of RAM size 1980 * or whatever the user passed on module init */ 1981 if (amdgpu_gtt_size == -1) { 1982 struct sysinfo si; 1983 1984 si_meminfo(&si); 1985 gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20), 1986 adev->gmc.mc_vram_size), 1987 ((uint64_t)si.totalram * si.mem_unit * 3/4)); 1988 } 1989 else 1990 gtt_size = (uint64_t)amdgpu_gtt_size << 20; 1991 1992 /* Initialize GTT memory pool */ 1993 r = amdgpu_gtt_mgr_init(adev, gtt_size); 1994 if (r) { 1995 DRM_ERROR("Failed initializing GTT heap.\n"); 1996 return r; 1997 } 1998 DRM_INFO("amdgpu: %uM of GTT memory ready.\n", 1999 (unsigned)(gtt_size / (1024 * 1024))); 2000 2001 /* Initialize various on-chip memory pools */ 2002 r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GDS, adev->gds.gds_size); 2003 if (r) { 2004 DRM_ERROR("Failed initializing GDS heap.\n"); 2005 return r; 2006 } 2007 2008 r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GWS, adev->gds.gws_size); 2009 if (r) { 2010 DRM_ERROR("Failed initializing gws heap.\n"); 2011 return r; 2012 } 2013 2014 r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_OA, adev->gds.oa_size); 2015 if (r) { 2016 DRM_ERROR("Failed initializing oa heap.\n"); 2017 return r; 2018 } 2019 2020 return 0; 2021 } 2022 2023 /* 2024 * amdgpu_ttm_late_init - Handle any late initialization for amdgpu_ttm 2025 */ 2026 void amdgpu_ttm_late_init(struct amdgpu_device *adev) 2027 { 2028 /* return the VGA stolen memory (if any) back to VRAM */ 2029 if (!adev->mman.keep_stolen_vga_memory) 2030 amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL); 2031 amdgpu_bo_free_kernel(&adev->mman.stolen_extended_memory, NULL, NULL); 2032 } 2033 2034 /* 2035 * amdgpu_ttm_fini - De-initialize the TTM memory pools 2036 */ 2037 void amdgpu_ttm_fini(struct amdgpu_device *adev) 2038 { 2039 if (!adev->mman.initialized) 2040 return; 2041 2042 amdgpu_ttm_training_reserve_vram_fini(adev); 2043 /* return the stolen vga memory back to VRAM */ 2044 if (adev->mman.keep_stolen_vga_memory) 2045 amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL); 2046 /* return the IP Discovery TMR memory back to VRAM */ 2047 amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL); 2048 amdgpu_ttm_fw_reserve_vram_fini(adev); 2049 2050 if (adev->mman.aper_base_kaddr) 2051 iounmap(adev->mman.aper_base_kaddr); 2052 adev->mman.aper_base_kaddr = NULL; 2053 2054 amdgpu_vram_mgr_fini(adev); 2055 amdgpu_gtt_mgr_fini(adev); 2056 ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS); 2057 ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS); 2058 ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA); 2059 ttm_bo_device_release(&adev->mman.bdev); 2060 adev->mman.initialized = false; 2061 DRM_INFO("amdgpu: ttm finalized\n"); 2062 } 2063 2064 /** 2065 * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions 2066 * 2067 * @adev: amdgpu_device pointer 2068 * @enable: true when we can use buffer functions. 2069 * 2070 * Enable/disable use of buffer functions during suspend/resume. This should 2071 * only be called at bootup or when userspace isn't running. 2072 */ 2073 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable) 2074 { 2075 struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM); 2076 uint64_t size; 2077 int r; 2078 2079 if (!adev->mman.initialized || amdgpu_in_reset(adev) || 2080 adev->mman.buffer_funcs_enabled == enable) 2081 return; 2082 2083 if (enable) { 2084 struct amdgpu_ring *ring; 2085 struct drm_gpu_scheduler *sched; 2086 2087 ring = adev->mman.buffer_funcs_ring; 2088 sched = &ring->sched; 2089 r = drm_sched_entity_init(&adev->mman.entity, 2090 DRM_SCHED_PRIORITY_KERNEL, &sched, 2091 1, NULL); 2092 if (r) { 2093 DRM_ERROR("Failed setting up TTM BO move entity (%d)\n", 2094 r); 2095 return; 2096 } 2097 } else { 2098 drm_sched_entity_destroy(&adev->mman.entity); 2099 dma_fence_put(man->move); 2100 man->move = NULL; 2101 } 2102 2103 /* this just adjusts TTM size idea, which sets lpfn to the correct value */ 2104 if (enable) 2105 size = adev->gmc.real_vram_size; 2106 else 2107 size = adev->gmc.visible_vram_size; 2108 man->size = size >> PAGE_SHIFT; 2109 adev->mman.buffer_funcs_enabled = enable; 2110 } 2111 2112 static vm_fault_t amdgpu_ttm_fault(struct vm_fault *vmf) 2113 { 2114 struct ttm_buffer_object *bo = vmf->vma->vm_private_data; 2115 vm_fault_t ret; 2116 2117 ret = ttm_bo_vm_reserve(bo, vmf); 2118 if (ret) 2119 return ret; 2120 2121 ret = amdgpu_bo_fault_reserve_notify(bo); 2122 if (ret) 2123 goto unlock; 2124 2125 ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot, 2126 TTM_BO_VM_NUM_PREFAULT, 1); 2127 if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) 2128 return ret; 2129 2130 unlock: 2131 dma_resv_unlock(bo->base.resv); 2132 return ret; 2133 } 2134 2135 static struct vm_operations_struct amdgpu_ttm_vm_ops = { 2136 .fault = amdgpu_ttm_fault, 2137 .open = ttm_bo_vm_open, 2138 .close = ttm_bo_vm_close, 2139 .access = ttm_bo_vm_access 2140 }; 2141 2142 int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma) 2143 { 2144 struct drm_file *file_priv = filp->private_data; 2145 struct amdgpu_device *adev = drm_to_adev(file_priv->minor->dev); 2146 int r; 2147 2148 r = ttm_bo_mmap(filp, vma, &adev->mman.bdev); 2149 if (unlikely(r != 0)) 2150 return r; 2151 2152 vma->vm_ops = &amdgpu_ttm_vm_ops; 2153 return 0; 2154 } 2155 2156 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset, 2157 uint64_t dst_offset, uint32_t byte_count, 2158 struct dma_resv *resv, 2159 struct dma_fence **fence, bool direct_submit, 2160 bool vm_needs_flush, bool tmz) 2161 { 2162 enum amdgpu_ib_pool_type pool = direct_submit ? AMDGPU_IB_POOL_DIRECT : 2163 AMDGPU_IB_POOL_DELAYED; 2164 struct amdgpu_device *adev = ring->adev; 2165 struct amdgpu_job *job; 2166 2167 uint32_t max_bytes; 2168 unsigned num_loops, num_dw; 2169 unsigned i; 2170 int r; 2171 2172 if (direct_submit && !ring->sched.ready) { 2173 DRM_ERROR("Trying to move memory with ring turned off.\n"); 2174 return -EINVAL; 2175 } 2176 2177 max_bytes = adev->mman.buffer_funcs->copy_max_bytes; 2178 num_loops = DIV_ROUND_UP(byte_count, max_bytes); 2179 num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8); 2180 2181 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, pool, &job); 2182 if (r) 2183 return r; 2184 2185 if (vm_needs_flush) { 2186 job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo); 2187 job->vm_needs_flush = true; 2188 } 2189 if (resv) { 2190 r = amdgpu_sync_resv(adev, &job->sync, resv, 2191 AMDGPU_SYNC_ALWAYS, 2192 AMDGPU_FENCE_OWNER_UNDEFINED); 2193 if (r) { 2194 DRM_ERROR("sync failed (%d).\n", r); 2195 goto error_free; 2196 } 2197 } 2198 2199 for (i = 0; i < num_loops; i++) { 2200 uint32_t cur_size_in_bytes = min(byte_count, max_bytes); 2201 2202 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset, 2203 dst_offset, cur_size_in_bytes, tmz); 2204 2205 src_offset += cur_size_in_bytes; 2206 dst_offset += cur_size_in_bytes; 2207 byte_count -= cur_size_in_bytes; 2208 } 2209 2210 amdgpu_ring_pad_ib(ring, &job->ibs[0]); 2211 WARN_ON(job->ibs[0].length_dw > num_dw); 2212 if (direct_submit) 2213 r = amdgpu_job_submit_direct(job, ring, fence); 2214 else 2215 r = amdgpu_job_submit(job, &adev->mman.entity, 2216 AMDGPU_FENCE_OWNER_UNDEFINED, fence); 2217 if (r) 2218 goto error_free; 2219 2220 return r; 2221 2222 error_free: 2223 amdgpu_job_free(job); 2224 DRM_ERROR("Error scheduling IBs (%d)\n", r); 2225 return r; 2226 } 2227 2228 int amdgpu_fill_buffer(struct amdgpu_bo *bo, 2229 uint32_t src_data, 2230 struct dma_resv *resv, 2231 struct dma_fence **fence) 2232 { 2233 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 2234 uint32_t max_bytes = adev->mman.buffer_funcs->fill_max_bytes; 2235 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; 2236 2237 struct drm_mm_node *mm_node; 2238 unsigned long num_pages; 2239 unsigned int num_loops, num_dw; 2240 2241 struct amdgpu_job *job; 2242 int r; 2243 2244 if (!adev->mman.buffer_funcs_enabled) { 2245 DRM_ERROR("Trying to clear memory with ring turned off.\n"); 2246 return -EINVAL; 2247 } 2248 2249 if (bo->tbo.mem.mem_type == TTM_PL_TT) { 2250 r = amdgpu_ttm_alloc_gart(&bo->tbo); 2251 if (r) 2252 return r; 2253 } 2254 2255 num_pages = bo->tbo.num_pages; 2256 mm_node = bo->tbo.mem.mm_node; 2257 num_loops = 0; 2258 while (num_pages) { 2259 uint64_t byte_count = mm_node->size << PAGE_SHIFT; 2260 2261 num_loops += DIV_ROUND_UP_ULL(byte_count, max_bytes); 2262 num_pages -= mm_node->size; 2263 ++mm_node; 2264 } 2265 num_dw = num_loops * adev->mman.buffer_funcs->fill_num_dw; 2266 2267 /* for IB padding */ 2268 num_dw += 64; 2269 2270 r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, AMDGPU_IB_POOL_DELAYED, 2271 &job); 2272 if (r) 2273 return r; 2274 2275 if (resv) { 2276 r = amdgpu_sync_resv(adev, &job->sync, resv, 2277 AMDGPU_SYNC_ALWAYS, 2278 AMDGPU_FENCE_OWNER_UNDEFINED); 2279 if (r) { 2280 DRM_ERROR("sync failed (%d).\n", r); 2281 goto error_free; 2282 } 2283 } 2284 2285 num_pages = bo->tbo.num_pages; 2286 mm_node = bo->tbo.mem.mm_node; 2287 2288 while (num_pages) { 2289 uint64_t byte_count = mm_node->size << PAGE_SHIFT; 2290 uint64_t dst_addr; 2291 2292 dst_addr = amdgpu_mm_node_addr(&bo->tbo, mm_node, &bo->tbo.mem); 2293 while (byte_count) { 2294 uint32_t cur_size_in_bytes = min_t(uint64_t, byte_count, 2295 max_bytes); 2296 2297 amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data, 2298 dst_addr, cur_size_in_bytes); 2299 2300 dst_addr += cur_size_in_bytes; 2301 byte_count -= cur_size_in_bytes; 2302 } 2303 2304 num_pages -= mm_node->size; 2305 ++mm_node; 2306 } 2307 2308 amdgpu_ring_pad_ib(ring, &job->ibs[0]); 2309 WARN_ON(job->ibs[0].length_dw > num_dw); 2310 r = amdgpu_job_submit(job, &adev->mman.entity, 2311 AMDGPU_FENCE_OWNER_UNDEFINED, fence); 2312 if (r) 2313 goto error_free; 2314 2315 return 0; 2316 2317 error_free: 2318 amdgpu_job_free(job); 2319 return r; 2320 } 2321 2322 #if defined(CONFIG_DEBUG_FS) 2323 2324 static int amdgpu_mm_dump_table(struct seq_file *m, void *data) 2325 { 2326 struct drm_info_node *node = (struct drm_info_node *)m->private; 2327 unsigned ttm_pl = (uintptr_t)node->info_ent->data; 2328 struct drm_device *dev = node->minor->dev; 2329 struct amdgpu_device *adev = drm_to_adev(dev); 2330 struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, ttm_pl); 2331 struct drm_printer p = drm_seq_file_printer(m); 2332 2333 man->func->debug(man, &p); 2334 return 0; 2335 } 2336 2337 static int amdgpu_ttm_pool_debugfs(struct seq_file *m, void *data) 2338 { 2339 struct drm_info_node *node = (struct drm_info_node *)m->private; 2340 struct drm_device *dev = node->minor->dev; 2341 struct amdgpu_device *adev = drm_to_adev(dev); 2342 2343 return ttm_pool_debugfs(&adev->mman.bdev.pool, m); 2344 } 2345 2346 static const struct drm_info_list amdgpu_ttm_debugfs_list[] = { 2347 {"amdgpu_vram_mm", amdgpu_mm_dump_table, 0, (void *)TTM_PL_VRAM}, 2348 {"amdgpu_gtt_mm", amdgpu_mm_dump_table, 0, (void *)TTM_PL_TT}, 2349 {"amdgpu_gds_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_GDS}, 2350 {"amdgpu_gws_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_GWS}, 2351 {"amdgpu_oa_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_OA}, 2352 {"ttm_page_pool", amdgpu_ttm_pool_debugfs, 0, NULL}, 2353 }; 2354 2355 /* 2356 * amdgpu_ttm_vram_read - Linear read access to VRAM 2357 * 2358 * Accesses VRAM via MMIO for debugging purposes. 2359 */ 2360 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf, 2361 size_t size, loff_t *pos) 2362 { 2363 struct amdgpu_device *adev = file_inode(f)->i_private; 2364 ssize_t result = 0; 2365 2366 if (size & 0x3 || *pos & 0x3) 2367 return -EINVAL; 2368 2369 if (*pos >= adev->gmc.mc_vram_size) 2370 return -ENXIO; 2371 2372 size = min(size, (size_t)(adev->gmc.mc_vram_size - *pos)); 2373 while (size) { 2374 size_t bytes = min(size, AMDGPU_TTM_VRAM_MAX_DW_READ * 4); 2375 uint32_t value[AMDGPU_TTM_VRAM_MAX_DW_READ]; 2376 2377 amdgpu_device_vram_access(adev, *pos, value, bytes, false); 2378 if (copy_to_user(buf, value, bytes)) 2379 return -EFAULT; 2380 2381 result += bytes; 2382 buf += bytes; 2383 *pos += bytes; 2384 size -= bytes; 2385 } 2386 2387 return result; 2388 } 2389 2390 /* 2391 * amdgpu_ttm_vram_write - Linear write access to VRAM 2392 * 2393 * Accesses VRAM via MMIO for debugging purposes. 2394 */ 2395 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf, 2396 size_t size, loff_t *pos) 2397 { 2398 struct amdgpu_device *adev = file_inode(f)->i_private; 2399 ssize_t result = 0; 2400 int r; 2401 2402 if (size & 0x3 || *pos & 0x3) 2403 return -EINVAL; 2404 2405 if (*pos >= adev->gmc.mc_vram_size) 2406 return -ENXIO; 2407 2408 while (size) { 2409 unsigned long flags; 2410 uint32_t value; 2411 2412 if (*pos >= adev->gmc.mc_vram_size) 2413 return result; 2414 2415 r = get_user(value, (uint32_t *)buf); 2416 if (r) 2417 return r; 2418 2419 spin_lock_irqsave(&adev->mmio_idx_lock, flags); 2420 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000); 2421 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31); 2422 WREG32_NO_KIQ(mmMM_DATA, value); 2423 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); 2424 2425 result += 4; 2426 buf += 4; 2427 *pos += 4; 2428 size -= 4; 2429 } 2430 2431 return result; 2432 } 2433 2434 static const struct file_operations amdgpu_ttm_vram_fops = { 2435 .owner = THIS_MODULE, 2436 .read = amdgpu_ttm_vram_read, 2437 .write = amdgpu_ttm_vram_write, 2438 .llseek = default_llseek, 2439 }; 2440 2441 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS 2442 2443 /* 2444 * amdgpu_ttm_gtt_read - Linear read access to GTT memory 2445 */ 2446 static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf, 2447 size_t size, loff_t *pos) 2448 { 2449 struct amdgpu_device *adev = file_inode(f)->i_private; 2450 ssize_t result = 0; 2451 int r; 2452 2453 while (size) { 2454 loff_t p = *pos / PAGE_SIZE; 2455 unsigned off = *pos & ~PAGE_MASK; 2456 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off); 2457 struct page *page; 2458 void *ptr; 2459 2460 if (p >= adev->gart.num_cpu_pages) 2461 return result; 2462 2463 page = adev->gart.pages[p]; 2464 if (page) { 2465 ptr = kmap(page); 2466 ptr += off; 2467 2468 r = copy_to_user(buf, ptr, cur_size); 2469 kunmap(adev->gart.pages[p]); 2470 } else 2471 r = clear_user(buf, cur_size); 2472 2473 if (r) 2474 return -EFAULT; 2475 2476 result += cur_size; 2477 buf += cur_size; 2478 *pos += cur_size; 2479 size -= cur_size; 2480 } 2481 2482 return result; 2483 } 2484 2485 static const struct file_operations amdgpu_ttm_gtt_fops = { 2486 .owner = THIS_MODULE, 2487 .read = amdgpu_ttm_gtt_read, 2488 .llseek = default_llseek 2489 }; 2490 2491 #endif 2492 2493 /* 2494 * amdgpu_iomem_read - Virtual read access to GPU mapped memory 2495 * 2496 * This function is used to read memory that has been mapped to the 2497 * GPU and the known addresses are not physical addresses but instead 2498 * bus addresses (e.g., what you'd put in an IB or ring buffer). 2499 */ 2500 static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf, 2501 size_t size, loff_t *pos) 2502 { 2503 struct amdgpu_device *adev = file_inode(f)->i_private; 2504 struct iommu_domain *dom; 2505 ssize_t result = 0; 2506 int r; 2507 2508 /* retrieve the IOMMU domain if any for this device */ 2509 dom = iommu_get_domain_for_dev(adev->dev); 2510 2511 while (size) { 2512 phys_addr_t addr = *pos & PAGE_MASK; 2513 loff_t off = *pos & ~PAGE_MASK; 2514 size_t bytes = PAGE_SIZE - off; 2515 unsigned long pfn; 2516 struct page *p; 2517 void *ptr; 2518 2519 bytes = bytes < size ? bytes : size; 2520 2521 /* Translate the bus address to a physical address. If 2522 * the domain is NULL it means there is no IOMMU active 2523 * and the address translation is the identity 2524 */ 2525 addr = dom ? iommu_iova_to_phys(dom, addr) : addr; 2526 2527 pfn = addr >> PAGE_SHIFT; 2528 if (!pfn_valid(pfn)) 2529 return -EPERM; 2530 2531 p = pfn_to_page(pfn); 2532 if (p->mapping != adev->mman.bdev.dev_mapping) 2533 return -EPERM; 2534 2535 ptr = kmap(p); 2536 r = copy_to_user(buf, ptr + off, bytes); 2537 kunmap(p); 2538 if (r) 2539 return -EFAULT; 2540 2541 size -= bytes; 2542 *pos += bytes; 2543 result += bytes; 2544 } 2545 2546 return result; 2547 } 2548 2549 /* 2550 * amdgpu_iomem_write - Virtual write access to GPU mapped memory 2551 * 2552 * This function is used to write memory that has been mapped to the 2553 * GPU and the known addresses are not physical addresses but instead 2554 * bus addresses (e.g., what you'd put in an IB or ring buffer). 2555 */ 2556 static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf, 2557 size_t size, loff_t *pos) 2558 { 2559 struct amdgpu_device *adev = file_inode(f)->i_private; 2560 struct iommu_domain *dom; 2561 ssize_t result = 0; 2562 int r; 2563 2564 dom = iommu_get_domain_for_dev(adev->dev); 2565 2566 while (size) { 2567 phys_addr_t addr = *pos & PAGE_MASK; 2568 loff_t off = *pos & ~PAGE_MASK; 2569 size_t bytes = PAGE_SIZE - off; 2570 unsigned long pfn; 2571 struct page *p; 2572 void *ptr; 2573 2574 bytes = bytes < size ? bytes : size; 2575 2576 addr = dom ? iommu_iova_to_phys(dom, addr) : addr; 2577 2578 pfn = addr >> PAGE_SHIFT; 2579 if (!pfn_valid(pfn)) 2580 return -EPERM; 2581 2582 p = pfn_to_page(pfn); 2583 if (p->mapping != adev->mman.bdev.dev_mapping) 2584 return -EPERM; 2585 2586 ptr = kmap(p); 2587 r = copy_from_user(ptr + off, buf, bytes); 2588 kunmap(p); 2589 if (r) 2590 return -EFAULT; 2591 2592 size -= bytes; 2593 *pos += bytes; 2594 result += bytes; 2595 } 2596 2597 return result; 2598 } 2599 2600 static const struct file_operations amdgpu_ttm_iomem_fops = { 2601 .owner = THIS_MODULE, 2602 .read = amdgpu_iomem_read, 2603 .write = amdgpu_iomem_write, 2604 .llseek = default_llseek 2605 }; 2606 2607 static const struct { 2608 char *name; 2609 const struct file_operations *fops; 2610 int domain; 2611 } ttm_debugfs_entries[] = { 2612 { "amdgpu_vram", &amdgpu_ttm_vram_fops, TTM_PL_VRAM }, 2613 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS 2614 { "amdgpu_gtt", &amdgpu_ttm_gtt_fops, TTM_PL_TT }, 2615 #endif 2616 { "amdgpu_iomem", &amdgpu_ttm_iomem_fops, TTM_PL_SYSTEM }, 2617 }; 2618 2619 #endif 2620 2621 int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev) 2622 { 2623 #if defined(CONFIG_DEBUG_FS) 2624 unsigned count; 2625 2626 struct drm_minor *minor = adev_to_drm(adev)->primary; 2627 struct dentry *ent, *root = minor->debugfs_root; 2628 2629 for (count = 0; count < ARRAY_SIZE(ttm_debugfs_entries); count++) { 2630 ent = debugfs_create_file( 2631 ttm_debugfs_entries[count].name, 2632 S_IFREG | S_IRUGO, root, 2633 adev, 2634 ttm_debugfs_entries[count].fops); 2635 if (IS_ERR(ent)) 2636 return PTR_ERR(ent); 2637 if (ttm_debugfs_entries[count].domain == TTM_PL_VRAM) 2638 i_size_write(ent->d_inode, adev->gmc.mc_vram_size); 2639 else if (ttm_debugfs_entries[count].domain == TTM_PL_TT) 2640 i_size_write(ent->d_inode, adev->gmc.gart_size); 2641 adev->mman.debugfs_entries[count] = ent; 2642 } 2643 2644 count = ARRAY_SIZE(amdgpu_ttm_debugfs_list); 2645 return amdgpu_debugfs_add_files(adev, amdgpu_ttm_debugfs_list, count); 2646 #else 2647 return 0; 2648 #endif 2649 } 2650