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/pagemap.h> 35 #include <linux/pci.h> 36 #include <linux/seq_file.h> 37 #include <linux/slab.h> 38 #include <linux/swap.h> 39 #include <linux/swiotlb.h> 40 41 #include <drm/drm_device.h> 42 #include <drm/drm_file.h> 43 #include <drm/drm_prime.h> 44 #include <drm/radeon_drm.h> 45 #include <drm/ttm/ttm_bo.h> 46 #include <drm/ttm/ttm_placement.h> 47 #include <drm/ttm/ttm_range_manager.h> 48 #include <drm/ttm/ttm_tt.h> 49 50 #include "radeon_reg.h" 51 #include "radeon.h" 52 #include "radeon_ttm.h" 53 54 static void radeon_ttm_debugfs_init(struct radeon_device *rdev); 55 56 static int radeon_ttm_tt_bind(struct ttm_device *bdev, struct ttm_tt *ttm, 57 struct ttm_resource *bo_mem); 58 static void radeon_ttm_tt_unbind(struct ttm_device *bdev, struct ttm_tt *ttm); 59 60 struct radeon_device *radeon_get_rdev(struct ttm_device *bdev) 61 { 62 struct radeon_mman *mman; 63 struct radeon_device *rdev; 64 65 mman = container_of(bdev, struct radeon_mman, bdev); 66 rdev = container_of(mman, struct radeon_device, mman); 67 return rdev; 68 } 69 70 static int radeon_ttm_init_vram(struct radeon_device *rdev) 71 { 72 return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM, 73 false, rdev->mc.real_vram_size >> PAGE_SHIFT); 74 } 75 76 static int radeon_ttm_init_gtt(struct radeon_device *rdev) 77 { 78 return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT, 79 true, rdev->mc.gtt_size >> PAGE_SHIFT); 80 } 81 82 static void radeon_evict_flags(struct ttm_buffer_object *bo, 83 struct ttm_placement *placement) 84 { 85 static const struct ttm_place placements = { 86 .fpfn = 0, 87 .lpfn = 0, 88 .mem_type = TTM_PL_SYSTEM, 89 .flags = 0 90 }; 91 92 struct radeon_bo *rbo; 93 94 if (!radeon_ttm_bo_is_radeon_bo(bo)) { 95 placement->placement = &placements; 96 placement->busy_placement = &placements; 97 placement->num_placement = 1; 98 placement->num_busy_placement = 1; 99 return; 100 } 101 rbo = container_of(bo, struct radeon_bo, tbo); 102 switch (bo->resource->mem_type) { 103 case TTM_PL_VRAM: 104 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false) 105 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU); 106 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size && 107 bo->resource->start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) { 108 unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 109 int i; 110 111 /* Try evicting to the CPU inaccessible part of VRAM 112 * first, but only set GTT as busy placement, so this 113 * BO will be evicted to GTT rather than causing other 114 * BOs to be evicted from VRAM 115 */ 116 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM | 117 RADEON_GEM_DOMAIN_GTT); 118 rbo->placement.num_busy_placement = 0; 119 for (i = 0; i < rbo->placement.num_placement; i++) { 120 if (rbo->placements[i].mem_type == TTM_PL_VRAM) { 121 if (rbo->placements[i].fpfn < fpfn) 122 rbo->placements[i].fpfn = fpfn; 123 } else { 124 rbo->placement.busy_placement = 125 &rbo->placements[i]; 126 rbo->placement.num_busy_placement = 1; 127 } 128 } 129 } else 130 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT); 131 break; 132 case TTM_PL_TT: 133 default: 134 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU); 135 } 136 *placement = rbo->placement; 137 } 138 139 static int radeon_move_blit(struct ttm_buffer_object *bo, 140 bool evict, 141 struct ttm_resource *new_mem, 142 struct ttm_resource *old_mem) 143 { 144 struct radeon_device *rdev; 145 uint64_t old_start, new_start; 146 struct radeon_fence *fence; 147 unsigned num_pages; 148 int r, ridx; 149 150 rdev = radeon_get_rdev(bo->bdev); 151 ridx = radeon_copy_ring_index(rdev); 152 old_start = (u64)old_mem->start << PAGE_SHIFT; 153 new_start = (u64)new_mem->start << PAGE_SHIFT; 154 155 switch (old_mem->mem_type) { 156 case TTM_PL_VRAM: 157 old_start += rdev->mc.vram_start; 158 break; 159 case TTM_PL_TT: 160 old_start += rdev->mc.gtt_start; 161 break; 162 default: 163 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type); 164 return -EINVAL; 165 } 166 switch (new_mem->mem_type) { 167 case TTM_PL_VRAM: 168 new_start += rdev->mc.vram_start; 169 break; 170 case TTM_PL_TT: 171 new_start += rdev->mc.gtt_start; 172 break; 173 default: 174 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type); 175 return -EINVAL; 176 } 177 if (!rdev->ring[ridx].ready) { 178 DRM_ERROR("Trying to move memory with ring turned off.\n"); 179 return -EINVAL; 180 } 181 182 BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0); 183 184 num_pages = PFN_UP(new_mem->size) * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); 185 fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->base.resv); 186 if (IS_ERR(fence)) 187 return PTR_ERR(fence); 188 189 r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, false, new_mem); 190 radeon_fence_unref(&fence); 191 return r; 192 } 193 194 static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict, 195 struct ttm_operation_ctx *ctx, 196 struct ttm_resource *new_mem, 197 struct ttm_place *hop) 198 { 199 struct ttm_resource *old_mem = bo->resource; 200 struct radeon_device *rdev; 201 struct radeon_bo *rbo; 202 int r; 203 204 if (new_mem->mem_type == TTM_PL_TT) { 205 r = radeon_ttm_tt_bind(bo->bdev, bo->ttm, new_mem); 206 if (r) 207 return r; 208 } 209 210 r = ttm_bo_wait_ctx(bo, ctx); 211 if (r) 212 return r; 213 214 rbo = container_of(bo, struct radeon_bo, tbo); 215 rdev = radeon_get_rdev(bo->bdev); 216 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 217 ttm_bo_move_null(bo, new_mem); 218 goto out; 219 } 220 if (old_mem->mem_type == TTM_PL_SYSTEM && 221 new_mem->mem_type == TTM_PL_TT) { 222 ttm_bo_move_null(bo, new_mem); 223 goto out; 224 } 225 226 if (old_mem->mem_type == TTM_PL_TT && 227 new_mem->mem_type == TTM_PL_SYSTEM) { 228 radeon_ttm_tt_unbind(bo->bdev, bo->ttm); 229 ttm_resource_free(bo, &bo->resource); 230 ttm_bo_assign_mem(bo, new_mem); 231 goto out; 232 } 233 if (rdev->ring[radeon_copy_ring_index(rdev)].ready && 234 rdev->asic->copy.copy != NULL) { 235 if ((old_mem->mem_type == TTM_PL_SYSTEM && 236 new_mem->mem_type == TTM_PL_VRAM) || 237 (old_mem->mem_type == TTM_PL_VRAM && 238 new_mem->mem_type == TTM_PL_SYSTEM)) { 239 hop->fpfn = 0; 240 hop->lpfn = 0; 241 hop->mem_type = TTM_PL_TT; 242 hop->flags = 0; 243 return -EMULTIHOP; 244 } 245 246 r = radeon_move_blit(bo, evict, new_mem, old_mem); 247 } else { 248 r = -ENODEV; 249 } 250 251 if (r) { 252 r = ttm_bo_move_memcpy(bo, ctx, new_mem); 253 if (r) 254 return r; 255 } 256 257 out: 258 /* update statistics */ 259 atomic64_add(bo->base.size, &rdev->num_bytes_moved); 260 radeon_bo_move_notify(bo); 261 return 0; 262 } 263 264 static int radeon_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem) 265 { 266 struct radeon_device *rdev = radeon_get_rdev(bdev); 267 size_t bus_size = (size_t)mem->size; 268 269 switch (mem->mem_type) { 270 case TTM_PL_SYSTEM: 271 /* system memory */ 272 return 0; 273 case TTM_PL_TT: 274 #if IS_ENABLED(CONFIG_AGP) 275 if (rdev->flags & RADEON_IS_AGP) { 276 /* RADEON_IS_AGP is set only if AGP is active */ 277 mem->bus.offset = (mem->start << PAGE_SHIFT) + 278 rdev->mc.agp_base; 279 mem->bus.is_iomem = !rdev->agp->cant_use_aperture; 280 mem->bus.caching = ttm_write_combined; 281 } 282 #endif 283 break; 284 case TTM_PL_VRAM: 285 mem->bus.offset = mem->start << PAGE_SHIFT; 286 /* check if it's visible */ 287 if ((mem->bus.offset + bus_size) > rdev->mc.visible_vram_size) 288 return -EINVAL; 289 mem->bus.offset += rdev->mc.aper_base; 290 mem->bus.is_iomem = true; 291 mem->bus.caching = ttm_write_combined; 292 #ifdef __alpha__ 293 /* 294 * Alpha: use bus.addr to hold the ioremap() return, 295 * so we can modify bus.base below. 296 */ 297 mem->bus.addr = ioremap_wc(mem->bus.offset, bus_size); 298 if (!mem->bus.addr) 299 return -ENOMEM; 300 301 /* 302 * Alpha: Use just the bus offset plus 303 * the hose/domain memory base for bus.base. 304 * It then can be used to build PTEs for VRAM 305 * access, as done in ttm_bo_vm_fault(). 306 */ 307 mem->bus.offset = (mem->bus.offset & 0x0ffffffffUL) + 308 rdev->hose->dense_mem_base; 309 #endif 310 break; 311 default: 312 return -EINVAL; 313 } 314 return 0; 315 } 316 317 /* 318 * TTM backend functions. 319 */ 320 struct radeon_ttm_tt { 321 struct ttm_tt ttm; 322 u64 offset; 323 324 uint64_t userptr; 325 struct mm_struct *usermm; 326 uint32_t userflags; 327 bool bound; 328 }; 329 330 /* prepare the sg table with the user pages */ 331 static int radeon_ttm_tt_pin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm) 332 { 333 struct radeon_device *rdev = radeon_get_rdev(bdev); 334 struct radeon_ttm_tt *gtt = (void *)ttm; 335 unsigned pinned = 0; 336 int r; 337 338 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY); 339 enum dma_data_direction direction = write ? 340 DMA_BIDIRECTIONAL : DMA_TO_DEVICE; 341 342 if (current->mm != gtt->usermm) 343 return -EPERM; 344 345 if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) { 346 /* check that we only pin down anonymous memory 347 to prevent problems with writeback */ 348 unsigned long end = gtt->userptr + (u64)ttm->num_pages * PAGE_SIZE; 349 struct vm_area_struct *vma; 350 vma = find_vma(gtt->usermm, gtt->userptr); 351 if (!vma || vma->vm_file || vma->vm_end < end) 352 return -EPERM; 353 } 354 355 do { 356 unsigned num_pages = ttm->num_pages - pinned; 357 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE; 358 struct page **pages = ttm->pages + pinned; 359 360 r = get_user_pages(userptr, num_pages, write ? FOLL_WRITE : 0, 361 pages, NULL); 362 if (r < 0) 363 goto release_pages; 364 365 pinned += r; 366 367 } while (pinned < ttm->num_pages); 368 369 r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0, 370 (u64)ttm->num_pages << PAGE_SHIFT, 371 GFP_KERNEL); 372 if (r) 373 goto release_sg; 374 375 r = dma_map_sgtable(rdev->dev, ttm->sg, direction, 0); 376 if (r) 377 goto release_sg; 378 379 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address, 380 ttm->num_pages); 381 382 return 0; 383 384 release_sg: 385 kfree(ttm->sg); 386 387 release_pages: 388 release_pages(ttm->pages, pinned); 389 return r; 390 } 391 392 static void radeon_ttm_tt_unpin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm) 393 { 394 struct radeon_device *rdev = radeon_get_rdev(bdev); 395 struct radeon_ttm_tt *gtt = (void *)ttm; 396 struct sg_page_iter sg_iter; 397 398 int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY); 399 enum dma_data_direction direction = write ? 400 DMA_BIDIRECTIONAL : DMA_TO_DEVICE; 401 402 /* double check that we don't free the table twice */ 403 if (!ttm->sg || !ttm->sg->sgl) 404 return; 405 406 /* free the sg table and pages again */ 407 dma_unmap_sgtable(rdev->dev, ttm->sg, direction, 0); 408 409 for_each_sgtable_page(ttm->sg, &sg_iter, 0) { 410 struct page *page = sg_page_iter_page(&sg_iter); 411 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY)) 412 set_page_dirty(page); 413 414 mark_page_accessed(page); 415 put_page(page); 416 } 417 418 sg_free_table(ttm->sg); 419 } 420 421 static bool radeon_ttm_backend_is_bound(struct ttm_tt *ttm) 422 { 423 struct radeon_ttm_tt *gtt = (void*)ttm; 424 425 return (gtt->bound); 426 } 427 428 static int radeon_ttm_backend_bind(struct ttm_device *bdev, 429 struct ttm_tt *ttm, 430 struct ttm_resource *bo_mem) 431 { 432 struct radeon_ttm_tt *gtt = (void*)ttm; 433 struct radeon_device *rdev = radeon_get_rdev(bdev); 434 uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ | 435 RADEON_GART_PAGE_WRITE; 436 int r; 437 438 if (gtt->bound) 439 return 0; 440 441 if (gtt->userptr) { 442 radeon_ttm_tt_pin_userptr(bdev, ttm); 443 flags &= ~RADEON_GART_PAGE_WRITE; 444 } 445 446 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 447 if (!ttm->num_pages) { 448 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n", 449 ttm->num_pages, bo_mem, ttm); 450 } 451 if (ttm->caching == ttm_cached) 452 flags |= RADEON_GART_PAGE_SNOOP; 453 r = radeon_gart_bind(rdev, gtt->offset, ttm->num_pages, 454 ttm->pages, gtt->ttm.dma_address, flags); 455 if (r) { 456 DRM_ERROR("failed to bind %u pages at 0x%08X\n", 457 ttm->num_pages, (unsigned)gtt->offset); 458 return r; 459 } 460 gtt->bound = true; 461 return 0; 462 } 463 464 static void radeon_ttm_backend_unbind(struct ttm_device *bdev, struct ttm_tt *ttm) 465 { 466 struct radeon_ttm_tt *gtt = (void *)ttm; 467 struct radeon_device *rdev = radeon_get_rdev(bdev); 468 469 if (gtt->userptr) 470 radeon_ttm_tt_unpin_userptr(bdev, ttm); 471 472 if (!gtt->bound) 473 return; 474 475 radeon_gart_unbind(rdev, gtt->offset, ttm->num_pages); 476 477 gtt->bound = false; 478 } 479 480 static void radeon_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm) 481 { 482 struct radeon_ttm_tt *gtt = (void *)ttm; 483 484 ttm_tt_fini(>t->ttm); 485 kfree(gtt); 486 } 487 488 static struct ttm_tt *radeon_ttm_tt_create(struct ttm_buffer_object *bo, 489 uint32_t page_flags) 490 { 491 struct radeon_ttm_tt *gtt; 492 enum ttm_caching caching; 493 struct radeon_bo *rbo; 494 #if IS_ENABLED(CONFIG_AGP) 495 struct radeon_device *rdev = radeon_get_rdev(bo->bdev); 496 497 if (rdev->flags & RADEON_IS_AGP) { 498 return ttm_agp_tt_create(bo, rdev->agp->bridge, page_flags); 499 } 500 #endif 501 rbo = container_of(bo, struct radeon_bo, tbo); 502 503 gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL); 504 if (gtt == NULL) { 505 return NULL; 506 } 507 508 if (rbo->flags & RADEON_GEM_GTT_UC) 509 caching = ttm_uncached; 510 else if (rbo->flags & RADEON_GEM_GTT_WC) 511 caching = ttm_write_combined; 512 else 513 caching = ttm_cached; 514 515 if (ttm_sg_tt_init(>t->ttm, bo, page_flags, caching)) { 516 kfree(gtt); 517 return NULL; 518 } 519 return >t->ttm; 520 } 521 522 static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct radeon_device *rdev, 523 struct ttm_tt *ttm) 524 { 525 #if IS_ENABLED(CONFIG_AGP) 526 if (rdev->flags & RADEON_IS_AGP) 527 return NULL; 528 #endif 529 530 if (!ttm) 531 return NULL; 532 return container_of(ttm, struct radeon_ttm_tt, ttm); 533 } 534 535 static int radeon_ttm_tt_populate(struct ttm_device *bdev, 536 struct ttm_tt *ttm, 537 struct ttm_operation_ctx *ctx) 538 { 539 struct radeon_device *rdev = radeon_get_rdev(bdev); 540 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm); 541 bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL); 542 543 if (gtt && gtt->userptr) { 544 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL); 545 if (!ttm->sg) 546 return -ENOMEM; 547 548 ttm->page_flags |= TTM_TT_FLAG_EXTERNAL; 549 return 0; 550 } 551 552 if (slave && ttm->sg) { 553 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address, 554 ttm->num_pages); 555 return 0; 556 } 557 558 return ttm_pool_alloc(&rdev->mman.bdev.pool, ttm, ctx); 559 } 560 561 static void radeon_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm) 562 { 563 struct radeon_device *rdev = radeon_get_rdev(bdev); 564 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm); 565 bool slave = !!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL); 566 567 radeon_ttm_tt_unbind(bdev, ttm); 568 569 if (gtt && gtt->userptr) { 570 kfree(ttm->sg); 571 ttm->page_flags &= ~TTM_TT_FLAG_EXTERNAL; 572 return; 573 } 574 575 if (slave) 576 return; 577 578 return ttm_pool_free(&rdev->mman.bdev.pool, ttm); 579 } 580 581 int radeon_ttm_tt_set_userptr(struct radeon_device *rdev, 582 struct ttm_tt *ttm, uint64_t addr, 583 uint32_t flags) 584 { 585 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm); 586 587 if (gtt == NULL) 588 return -EINVAL; 589 590 gtt->userptr = addr; 591 gtt->usermm = current->mm; 592 gtt->userflags = flags; 593 return 0; 594 } 595 596 bool radeon_ttm_tt_is_bound(struct ttm_device *bdev, 597 struct ttm_tt *ttm) 598 { 599 #if IS_ENABLED(CONFIG_AGP) 600 struct radeon_device *rdev = radeon_get_rdev(bdev); 601 if (rdev->flags & RADEON_IS_AGP) 602 return ttm_agp_is_bound(ttm); 603 #endif 604 return radeon_ttm_backend_is_bound(ttm); 605 } 606 607 static int radeon_ttm_tt_bind(struct ttm_device *bdev, 608 struct ttm_tt *ttm, 609 struct ttm_resource *bo_mem) 610 { 611 #if IS_ENABLED(CONFIG_AGP) 612 struct radeon_device *rdev = radeon_get_rdev(bdev); 613 #endif 614 615 if (!bo_mem) 616 return -EINVAL; 617 #if IS_ENABLED(CONFIG_AGP) 618 if (rdev->flags & RADEON_IS_AGP) 619 return ttm_agp_bind(ttm, bo_mem); 620 #endif 621 622 return radeon_ttm_backend_bind(bdev, ttm, bo_mem); 623 } 624 625 static void radeon_ttm_tt_unbind(struct ttm_device *bdev, 626 struct ttm_tt *ttm) 627 { 628 #if IS_ENABLED(CONFIG_AGP) 629 struct radeon_device *rdev = radeon_get_rdev(bdev); 630 631 if (rdev->flags & RADEON_IS_AGP) { 632 ttm_agp_unbind(ttm); 633 return; 634 } 635 #endif 636 radeon_ttm_backend_unbind(bdev, ttm); 637 } 638 639 static void radeon_ttm_tt_destroy(struct ttm_device *bdev, 640 struct ttm_tt *ttm) 641 { 642 #if IS_ENABLED(CONFIG_AGP) 643 struct radeon_device *rdev = radeon_get_rdev(bdev); 644 645 if (rdev->flags & RADEON_IS_AGP) { 646 ttm_agp_destroy(ttm); 647 return; 648 } 649 #endif 650 radeon_ttm_backend_destroy(bdev, ttm); 651 } 652 653 bool radeon_ttm_tt_has_userptr(struct radeon_device *rdev, 654 struct ttm_tt *ttm) 655 { 656 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm); 657 658 if (gtt == NULL) 659 return false; 660 661 return !!gtt->userptr; 662 } 663 664 bool radeon_ttm_tt_is_readonly(struct radeon_device *rdev, 665 struct ttm_tt *ttm) 666 { 667 struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm); 668 669 if (gtt == NULL) 670 return false; 671 672 return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY); 673 } 674 675 static struct ttm_device_funcs radeon_bo_driver = { 676 .ttm_tt_create = &radeon_ttm_tt_create, 677 .ttm_tt_populate = &radeon_ttm_tt_populate, 678 .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate, 679 .ttm_tt_destroy = &radeon_ttm_tt_destroy, 680 .eviction_valuable = ttm_bo_eviction_valuable, 681 .evict_flags = &radeon_evict_flags, 682 .move = &radeon_bo_move, 683 .io_mem_reserve = &radeon_ttm_io_mem_reserve, 684 }; 685 686 int radeon_ttm_init(struct radeon_device *rdev) 687 { 688 int r; 689 690 /* No others user of address space so set it to 0 */ 691 r = ttm_device_init(&rdev->mman.bdev, &radeon_bo_driver, rdev->dev, 692 rdev->ddev->anon_inode->i_mapping, 693 rdev->ddev->vma_offset_manager, 694 rdev->need_swiotlb, 695 dma_addressing_limited(&rdev->pdev->dev)); 696 if (r) { 697 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 698 return r; 699 } 700 rdev->mman.initialized = true; 701 702 r = radeon_ttm_init_vram(rdev); 703 if (r) { 704 DRM_ERROR("Failed initializing VRAM heap.\n"); 705 return r; 706 } 707 /* Change the size here instead of the init above so only lpfn is affected */ 708 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size); 709 710 r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true, 711 RADEON_GEM_DOMAIN_VRAM, 0, NULL, 712 NULL, &rdev->stolen_vga_memory); 713 if (r) { 714 return r; 715 } 716 r = radeon_bo_reserve(rdev->stolen_vga_memory, false); 717 if (r) 718 return r; 719 r = radeon_bo_pin(rdev->stolen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL); 720 radeon_bo_unreserve(rdev->stolen_vga_memory); 721 if (r) { 722 radeon_bo_unref(&rdev->stolen_vga_memory); 723 return r; 724 } 725 DRM_INFO("radeon: %uM of VRAM memory ready\n", 726 (unsigned) (rdev->mc.real_vram_size / (1024 * 1024))); 727 728 r = radeon_ttm_init_gtt(rdev); 729 if (r) { 730 DRM_ERROR("Failed initializing GTT heap.\n"); 731 return r; 732 } 733 DRM_INFO("radeon: %uM of GTT memory ready.\n", 734 (unsigned)(rdev->mc.gtt_size / (1024 * 1024))); 735 736 radeon_ttm_debugfs_init(rdev); 737 738 return 0; 739 } 740 741 void radeon_ttm_fini(struct radeon_device *rdev) 742 { 743 int r; 744 745 if (!rdev->mman.initialized) 746 return; 747 748 if (rdev->stolen_vga_memory) { 749 r = radeon_bo_reserve(rdev->stolen_vga_memory, false); 750 if (r == 0) { 751 radeon_bo_unpin(rdev->stolen_vga_memory); 752 radeon_bo_unreserve(rdev->stolen_vga_memory); 753 } 754 radeon_bo_unref(&rdev->stolen_vga_memory); 755 } 756 ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_VRAM); 757 ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_TT); 758 ttm_device_fini(&rdev->mman.bdev); 759 radeon_gart_fini(rdev); 760 rdev->mman.initialized = false; 761 DRM_INFO("radeon: ttm finalized\n"); 762 } 763 764 /* this should only be called at bootup or when userspace 765 * isn't running */ 766 void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size) 767 { 768 struct ttm_resource_manager *man; 769 770 if (!rdev->mman.initialized) 771 return; 772 773 man = ttm_manager_type(&rdev->mman.bdev, TTM_PL_VRAM); 774 /* this just adjusts TTM size idea, which sets lpfn to the correct value */ 775 man->size = size >> PAGE_SHIFT; 776 } 777 778 #if defined(CONFIG_DEBUG_FS) 779 780 static int radeon_ttm_page_pool_show(struct seq_file *m, void *data) 781 { 782 struct radeon_device *rdev = (struct radeon_device *)m->private; 783 784 return ttm_pool_debugfs(&rdev->mman.bdev.pool, m); 785 } 786 787 DEFINE_SHOW_ATTRIBUTE(radeon_ttm_page_pool); 788 789 static int radeon_ttm_vram_open(struct inode *inode, struct file *filep) 790 { 791 struct radeon_device *rdev = inode->i_private; 792 i_size_write(inode, rdev->mc.mc_vram_size); 793 filep->private_data = inode->i_private; 794 return 0; 795 } 796 797 static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf, 798 size_t size, loff_t *pos) 799 { 800 struct radeon_device *rdev = f->private_data; 801 ssize_t result = 0; 802 int r; 803 804 if (size & 0x3 || *pos & 0x3) 805 return -EINVAL; 806 807 while (size) { 808 unsigned long flags; 809 uint32_t value; 810 811 if (*pos >= rdev->mc.mc_vram_size) 812 return result; 813 814 spin_lock_irqsave(&rdev->mmio_idx_lock, flags); 815 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000); 816 if (rdev->family >= CHIP_CEDAR) 817 WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31); 818 value = RREG32(RADEON_MM_DATA); 819 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags); 820 821 r = put_user(value, (uint32_t __user *)buf); 822 if (r) 823 return r; 824 825 result += 4; 826 buf += 4; 827 *pos += 4; 828 size -= 4; 829 } 830 831 return result; 832 } 833 834 static const struct file_operations radeon_ttm_vram_fops = { 835 .owner = THIS_MODULE, 836 .open = radeon_ttm_vram_open, 837 .read = radeon_ttm_vram_read, 838 .llseek = default_llseek 839 }; 840 841 static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep) 842 { 843 struct radeon_device *rdev = inode->i_private; 844 i_size_write(inode, rdev->mc.gtt_size); 845 filep->private_data = inode->i_private; 846 return 0; 847 } 848 849 static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf, 850 size_t size, loff_t *pos) 851 { 852 struct radeon_device *rdev = f->private_data; 853 ssize_t result = 0; 854 int r; 855 856 while (size) { 857 loff_t p = *pos / PAGE_SIZE; 858 unsigned off = *pos & ~PAGE_MASK; 859 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off); 860 struct page *page; 861 void *ptr; 862 863 if (p >= rdev->gart.num_cpu_pages) 864 return result; 865 866 page = rdev->gart.pages[p]; 867 if (page) { 868 ptr = kmap_local_page(page); 869 ptr += off; 870 871 r = copy_to_user(buf, ptr, cur_size); 872 kunmap_local(ptr); 873 } else 874 r = clear_user(buf, cur_size); 875 876 if (r) 877 return -EFAULT; 878 879 result += cur_size; 880 buf += cur_size; 881 *pos += cur_size; 882 size -= cur_size; 883 } 884 885 return result; 886 } 887 888 static const struct file_operations radeon_ttm_gtt_fops = { 889 .owner = THIS_MODULE, 890 .open = radeon_ttm_gtt_open, 891 .read = radeon_ttm_gtt_read, 892 .llseek = default_llseek 893 }; 894 895 #endif 896 897 static void radeon_ttm_debugfs_init(struct radeon_device *rdev) 898 { 899 #if defined(CONFIG_DEBUG_FS) 900 struct drm_minor *minor = rdev->ddev->primary; 901 struct dentry *root = minor->debugfs_root; 902 903 debugfs_create_file("radeon_vram", 0444, root, rdev, 904 &radeon_ttm_vram_fops); 905 debugfs_create_file("radeon_gtt", 0444, root, rdev, 906 &radeon_ttm_gtt_fops); 907 debugfs_create_file("ttm_page_pool", 0444, root, rdev, 908 &radeon_ttm_page_pool_fops); 909 ttm_resource_manager_create_debugfs(ttm_manager_type(&rdev->mman.bdev, 910 TTM_PL_VRAM), 911 root, "radeon_vram_mm"); 912 ttm_resource_manager_create_debugfs(ttm_manager_type(&rdev->mman.bdev, 913 TTM_PL_TT), 914 root, "radeon_gtt_mm"); 915 #endif 916 } 917