1 /* 2 * Copyright 2016 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Christian König 23 */ 24 25 #include <linux/dma-mapping.h> 26 #include "amdgpu.h" 27 #include "amdgpu_vm.h" 28 #include "amdgpu_atomfirmware.h" 29 #include "atom.h" 30 31 static inline struct amdgpu_vram_mgr *to_vram_mgr(struct ttm_resource_manager *man) 32 { 33 return container_of(man, struct amdgpu_vram_mgr, manager); 34 } 35 36 static inline struct amdgpu_device *to_amdgpu_device(struct amdgpu_vram_mgr *mgr) 37 { 38 return container_of(mgr, struct amdgpu_device, mman.vram_mgr); 39 } 40 41 /** 42 * DOC: mem_info_vram_total 43 * 44 * The amdgpu driver provides a sysfs API for reporting current total VRAM 45 * available on the device 46 * The file mem_info_vram_total is used for this and returns the total 47 * amount of VRAM in bytes 48 */ 49 static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev, 50 struct device_attribute *attr, char *buf) 51 { 52 struct drm_device *ddev = dev_get_drvdata(dev); 53 struct amdgpu_device *adev = drm_to_adev(ddev); 54 55 return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size); 56 } 57 58 /** 59 * DOC: mem_info_vis_vram_total 60 * 61 * The amdgpu driver provides a sysfs API for reporting current total 62 * visible VRAM available on the device 63 * The file mem_info_vis_vram_total is used for this and returns the total 64 * amount of visible VRAM in bytes 65 */ 66 static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev, 67 struct device_attribute *attr, char *buf) 68 { 69 struct drm_device *ddev = dev_get_drvdata(dev); 70 struct amdgpu_device *adev = drm_to_adev(ddev); 71 72 return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size); 73 } 74 75 /** 76 * DOC: mem_info_vram_used 77 * 78 * The amdgpu driver provides a sysfs API for reporting current total VRAM 79 * available on the device 80 * The file mem_info_vram_used is used for this and returns the total 81 * amount of currently used VRAM in bytes 82 */ 83 static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev, 84 struct device_attribute *attr, char *buf) 85 { 86 struct drm_device *ddev = dev_get_drvdata(dev); 87 struct amdgpu_device *adev = drm_to_adev(ddev); 88 struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM); 89 90 return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_usage(man)); 91 } 92 93 /** 94 * DOC: mem_info_vis_vram_used 95 * 96 * The amdgpu driver provides a sysfs API for reporting current total of 97 * used visible VRAM 98 * The file mem_info_vis_vram_used is used for this and returns the total 99 * amount of currently used visible VRAM in bytes 100 */ 101 static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev, 102 struct device_attribute *attr, char *buf) 103 { 104 struct drm_device *ddev = dev_get_drvdata(dev); 105 struct amdgpu_device *adev = drm_to_adev(ddev); 106 struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM); 107 108 return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_vis_usage(man)); 109 } 110 111 static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev, 112 struct device_attribute *attr, 113 char *buf) 114 { 115 struct drm_device *ddev = dev_get_drvdata(dev); 116 struct amdgpu_device *adev = drm_to_adev(ddev); 117 118 switch (adev->gmc.vram_vendor) { 119 case SAMSUNG: 120 return sysfs_emit(buf, "samsung\n"); 121 case INFINEON: 122 return sysfs_emit(buf, "infineon\n"); 123 case ELPIDA: 124 return sysfs_emit(buf, "elpida\n"); 125 case ETRON: 126 return sysfs_emit(buf, "etron\n"); 127 case NANYA: 128 return sysfs_emit(buf, "nanya\n"); 129 case HYNIX: 130 return sysfs_emit(buf, "hynix\n"); 131 case MOSEL: 132 return sysfs_emit(buf, "mosel\n"); 133 case WINBOND: 134 return sysfs_emit(buf, "winbond\n"); 135 case ESMT: 136 return sysfs_emit(buf, "esmt\n"); 137 case MICRON: 138 return sysfs_emit(buf, "micron\n"); 139 default: 140 return sysfs_emit(buf, "unknown\n"); 141 } 142 } 143 144 static DEVICE_ATTR(mem_info_vram_total, S_IRUGO, 145 amdgpu_mem_info_vram_total_show, NULL); 146 static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO, 147 amdgpu_mem_info_vis_vram_total_show,NULL); 148 static DEVICE_ATTR(mem_info_vram_used, S_IRUGO, 149 amdgpu_mem_info_vram_used_show, NULL); 150 static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO, 151 amdgpu_mem_info_vis_vram_used_show, NULL); 152 static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO, 153 amdgpu_mem_info_vram_vendor, NULL); 154 155 static const struct attribute *amdgpu_vram_mgr_attributes[] = { 156 &dev_attr_mem_info_vram_total.attr, 157 &dev_attr_mem_info_vis_vram_total.attr, 158 &dev_attr_mem_info_vram_used.attr, 159 &dev_attr_mem_info_vis_vram_used.attr, 160 &dev_attr_mem_info_vram_vendor.attr, 161 NULL 162 }; 163 164 static const struct ttm_resource_manager_func amdgpu_vram_mgr_func; 165 166 /** 167 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM 168 * 169 * @adev: amdgpu_device pointer 170 * 171 * Allocate and initialize the VRAM manager. 172 */ 173 int amdgpu_vram_mgr_init(struct amdgpu_device *adev) 174 { 175 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; 176 struct ttm_resource_manager *man = &mgr->manager; 177 int ret; 178 179 ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT); 180 181 man->func = &amdgpu_vram_mgr_func; 182 183 drm_mm_init(&mgr->mm, 0, man->size); 184 spin_lock_init(&mgr->lock); 185 INIT_LIST_HEAD(&mgr->reservations_pending); 186 INIT_LIST_HEAD(&mgr->reserved_pages); 187 188 /* Add the two VRAM-related sysfs files */ 189 ret = sysfs_create_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes); 190 if (ret) 191 DRM_ERROR("Failed to register sysfs\n"); 192 193 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager); 194 ttm_resource_manager_set_used(man, true); 195 return 0; 196 } 197 198 /** 199 * amdgpu_vram_mgr_fini - free and destroy VRAM manager 200 * 201 * @adev: amdgpu_device pointer 202 * 203 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still 204 * allocated inside it. 205 */ 206 void amdgpu_vram_mgr_fini(struct amdgpu_device *adev) 207 { 208 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; 209 struct ttm_resource_manager *man = &mgr->manager; 210 int ret; 211 struct amdgpu_vram_reservation *rsv, *temp; 212 213 ttm_resource_manager_set_used(man, false); 214 215 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); 216 if (ret) 217 return; 218 219 spin_lock(&mgr->lock); 220 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) 221 kfree(rsv); 222 223 list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) { 224 drm_mm_remove_node(&rsv->mm_node); 225 kfree(rsv); 226 } 227 drm_mm_takedown(&mgr->mm); 228 spin_unlock(&mgr->lock); 229 230 sysfs_remove_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes); 231 232 ttm_resource_manager_cleanup(man); 233 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL); 234 } 235 236 /** 237 * amdgpu_vram_mgr_vis_size - Calculate visible node size 238 * 239 * @adev: amdgpu_device pointer 240 * @node: MM node structure 241 * 242 * Calculate how many bytes of the MM node are inside visible VRAM 243 */ 244 static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev, 245 struct drm_mm_node *node) 246 { 247 uint64_t start = node->start << PAGE_SHIFT; 248 uint64_t end = (node->size + node->start) << PAGE_SHIFT; 249 250 if (start >= adev->gmc.visible_vram_size) 251 return 0; 252 253 return (end > adev->gmc.visible_vram_size ? 254 adev->gmc.visible_vram_size : end) - start; 255 } 256 257 /** 258 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size 259 * 260 * @bo: &amdgpu_bo buffer object (must be in VRAM) 261 * 262 * Returns: 263 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM. 264 */ 265 u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo) 266 { 267 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 268 struct ttm_resource *mem = &bo->tbo.mem; 269 struct drm_mm_node *nodes = mem->mm_node; 270 unsigned pages = mem->num_pages; 271 u64 usage; 272 273 if (amdgpu_gmc_vram_full_visible(&adev->gmc)) 274 return amdgpu_bo_size(bo); 275 276 if (mem->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT) 277 return 0; 278 279 for (usage = 0; nodes && pages; pages -= nodes->size, nodes++) 280 usage += amdgpu_vram_mgr_vis_size(adev, nodes); 281 282 return usage; 283 } 284 285 static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man) 286 { 287 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 288 struct amdgpu_device *adev = to_amdgpu_device(mgr); 289 struct drm_mm *mm = &mgr->mm; 290 struct amdgpu_vram_reservation *rsv, *temp; 291 uint64_t vis_usage; 292 293 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) { 294 if (drm_mm_reserve_node(mm, &rsv->mm_node)) 295 continue; 296 297 dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n", 298 rsv->mm_node.start, rsv->mm_node.size); 299 300 vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node); 301 atomic64_add(vis_usage, &mgr->vis_usage); 302 atomic64_add(rsv->mm_node.size << PAGE_SHIFT, &mgr->usage); 303 list_move(&rsv->node, &mgr->reserved_pages); 304 } 305 } 306 307 /** 308 * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM 309 * 310 * @man: TTM memory type manager 311 * @start: start address of the range in VRAM 312 * @size: size of the range 313 * 314 * Reserve memory from start addess with the specified size in VRAM 315 */ 316 int amdgpu_vram_mgr_reserve_range(struct ttm_resource_manager *man, 317 uint64_t start, uint64_t size) 318 { 319 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 320 struct amdgpu_vram_reservation *rsv; 321 322 rsv = kzalloc(sizeof(*rsv), GFP_KERNEL); 323 if (!rsv) 324 return -ENOMEM; 325 326 INIT_LIST_HEAD(&rsv->node); 327 rsv->mm_node.start = start >> PAGE_SHIFT; 328 rsv->mm_node.size = size >> PAGE_SHIFT; 329 330 spin_lock(&mgr->lock); 331 list_add_tail(&mgr->reservations_pending, &rsv->node); 332 amdgpu_vram_mgr_do_reserve(man); 333 spin_unlock(&mgr->lock); 334 335 return 0; 336 } 337 338 /** 339 * amdgpu_vram_mgr_query_page_status - query the reservation status 340 * 341 * @man: TTM memory type manager 342 * @start: start address of a page in VRAM 343 * 344 * Returns: 345 * -EBUSY: the page is still hold and in pending list 346 * 0: the page has been reserved 347 * -ENOENT: the input page is not a reservation 348 */ 349 int amdgpu_vram_mgr_query_page_status(struct ttm_resource_manager *man, 350 uint64_t start) 351 { 352 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 353 struct amdgpu_vram_reservation *rsv; 354 int ret; 355 356 spin_lock(&mgr->lock); 357 358 list_for_each_entry(rsv, &mgr->reservations_pending, node) { 359 if ((rsv->mm_node.start <= start) && 360 (start < (rsv->mm_node.start + rsv->mm_node.size))) { 361 ret = -EBUSY; 362 goto out; 363 } 364 } 365 366 list_for_each_entry(rsv, &mgr->reserved_pages, node) { 367 if ((rsv->mm_node.start <= start) && 368 (start < (rsv->mm_node.start + rsv->mm_node.size))) { 369 ret = 0; 370 goto out; 371 } 372 } 373 374 ret = -ENOENT; 375 out: 376 spin_unlock(&mgr->lock); 377 return ret; 378 } 379 380 /** 381 * amdgpu_vram_mgr_virt_start - update virtual start address 382 * 383 * @mem: ttm_resource to update 384 * @node: just allocated node 385 * 386 * Calculate a virtual BO start address to easily check if everything is CPU 387 * accessible. 388 */ 389 static void amdgpu_vram_mgr_virt_start(struct ttm_resource *mem, 390 struct drm_mm_node *node) 391 { 392 unsigned long start; 393 394 start = node->start + node->size; 395 if (start > mem->num_pages) 396 start -= mem->num_pages; 397 else 398 start = 0; 399 mem->start = max(mem->start, start); 400 } 401 402 /** 403 * amdgpu_vram_mgr_new - allocate new ranges 404 * 405 * @man: TTM memory type manager 406 * @tbo: TTM BO we need this range for 407 * @place: placement flags and restrictions 408 * @mem: the resulting mem object 409 * 410 * Allocate VRAM for the given BO. 411 */ 412 static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, 413 struct ttm_buffer_object *tbo, 414 const struct ttm_place *place, 415 struct ttm_resource *mem) 416 { 417 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 418 struct amdgpu_device *adev = to_amdgpu_device(mgr); 419 struct drm_mm *mm = &mgr->mm; 420 struct drm_mm_node *nodes; 421 enum drm_mm_insert_mode mode; 422 unsigned long lpfn, num_nodes, pages_per_node, pages_left; 423 uint64_t vis_usage = 0, mem_bytes, max_bytes; 424 unsigned i; 425 int r; 426 427 lpfn = place->lpfn; 428 if (!lpfn) 429 lpfn = man->size; 430 431 max_bytes = adev->gmc.mc_vram_size; 432 if (tbo->type != ttm_bo_type_kernel) 433 max_bytes -= AMDGPU_VM_RESERVED_VRAM; 434 435 /* bail out quickly if there's likely not enough VRAM for this BO */ 436 mem_bytes = (u64)mem->num_pages << PAGE_SHIFT; 437 if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) { 438 atomic64_sub(mem_bytes, &mgr->usage); 439 return -ENOSPC; 440 } 441 442 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { 443 pages_per_node = ~0ul; 444 num_nodes = 1; 445 } else { 446 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 447 pages_per_node = HPAGE_PMD_NR; 448 #else 449 /* default to 2MB */ 450 pages_per_node = (2UL << (20UL - PAGE_SHIFT)); 451 #endif 452 pages_per_node = max((uint32_t)pages_per_node, mem->page_alignment); 453 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node); 454 } 455 456 nodes = kvmalloc_array((uint32_t)num_nodes, sizeof(*nodes), 457 GFP_KERNEL | __GFP_ZERO); 458 if (!nodes) { 459 atomic64_sub(mem_bytes, &mgr->usage); 460 return -ENOMEM; 461 } 462 463 mode = DRM_MM_INSERT_BEST; 464 if (place->flags & TTM_PL_FLAG_TOPDOWN) 465 mode = DRM_MM_INSERT_HIGH; 466 467 mem->start = 0; 468 pages_left = mem->num_pages; 469 470 spin_lock(&mgr->lock); 471 for (i = 0; pages_left >= pages_per_node; ++i) { 472 unsigned long pages = rounddown_pow_of_two(pages_left); 473 474 /* Limit maximum size to 2GB due to SG table limitations */ 475 pages = min(pages, (2UL << (30 - PAGE_SHIFT))); 476 477 r = drm_mm_insert_node_in_range(mm, &nodes[i], pages, 478 pages_per_node, 0, 479 place->fpfn, lpfn, 480 mode); 481 if (unlikely(r)) 482 break; 483 484 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]); 485 amdgpu_vram_mgr_virt_start(mem, &nodes[i]); 486 pages_left -= pages; 487 } 488 489 for (; pages_left; ++i) { 490 unsigned long pages = min(pages_left, pages_per_node); 491 uint32_t alignment = mem->page_alignment; 492 493 if (pages == pages_per_node) 494 alignment = pages_per_node; 495 496 r = drm_mm_insert_node_in_range(mm, &nodes[i], 497 pages, alignment, 0, 498 place->fpfn, lpfn, 499 mode); 500 if (unlikely(r)) 501 goto error; 502 503 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]); 504 amdgpu_vram_mgr_virt_start(mem, &nodes[i]); 505 pages_left -= pages; 506 } 507 spin_unlock(&mgr->lock); 508 509 atomic64_add(vis_usage, &mgr->vis_usage); 510 511 mem->mm_node = nodes; 512 513 return 0; 514 515 error: 516 while (i--) 517 drm_mm_remove_node(&nodes[i]); 518 spin_unlock(&mgr->lock); 519 atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage); 520 521 kvfree(nodes); 522 return r; 523 } 524 525 /** 526 * amdgpu_vram_mgr_del - free ranges 527 * 528 * @man: TTM memory type manager 529 * @mem: TTM memory object 530 * 531 * Free the allocated VRAM again. 532 */ 533 static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man, 534 struct ttm_resource *mem) 535 { 536 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 537 struct amdgpu_device *adev = to_amdgpu_device(mgr); 538 struct drm_mm_node *nodes = mem->mm_node; 539 uint64_t usage = 0, vis_usage = 0; 540 unsigned pages = mem->num_pages; 541 542 if (!mem->mm_node) 543 return; 544 545 spin_lock(&mgr->lock); 546 while (pages) { 547 pages -= nodes->size; 548 drm_mm_remove_node(nodes); 549 usage += nodes->size << PAGE_SHIFT; 550 vis_usage += amdgpu_vram_mgr_vis_size(adev, nodes); 551 ++nodes; 552 } 553 amdgpu_vram_mgr_do_reserve(man); 554 spin_unlock(&mgr->lock); 555 556 atomic64_sub(usage, &mgr->usage); 557 atomic64_sub(vis_usage, &mgr->vis_usage); 558 559 kvfree(mem->mm_node); 560 mem->mm_node = NULL; 561 } 562 563 /** 564 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table 565 * 566 * @adev: amdgpu device pointer 567 * @mem: TTM memory object 568 * @dev: the other device 569 * @dir: dma direction 570 * @sgt: resulting sg table 571 * 572 * Allocate and fill a sg table from a VRAM allocation. 573 */ 574 int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, 575 struct ttm_resource *mem, 576 struct device *dev, 577 enum dma_data_direction dir, 578 struct sg_table **sgt) 579 { 580 struct drm_mm_node *node; 581 struct scatterlist *sg; 582 int num_entries = 0; 583 unsigned int pages; 584 int i, r; 585 586 *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL); 587 if (!*sgt) 588 return -ENOMEM; 589 590 for (pages = mem->num_pages, node = mem->mm_node; 591 pages; pages -= node->size, ++node) 592 ++num_entries; 593 594 r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL); 595 if (r) 596 goto error_free; 597 598 for_each_sgtable_sg((*sgt), sg, i) 599 sg->length = 0; 600 601 node = mem->mm_node; 602 for_each_sgtable_sg((*sgt), sg, i) { 603 phys_addr_t phys = (node->start << PAGE_SHIFT) + 604 adev->gmc.aper_base; 605 size_t size = node->size << PAGE_SHIFT; 606 dma_addr_t addr; 607 608 ++node; 609 addr = dma_map_resource(dev, phys, size, dir, 610 DMA_ATTR_SKIP_CPU_SYNC); 611 r = dma_mapping_error(dev, addr); 612 if (r) 613 goto error_unmap; 614 615 sg_set_page(sg, NULL, size, 0); 616 sg_dma_address(sg) = addr; 617 sg_dma_len(sg) = size; 618 } 619 return 0; 620 621 error_unmap: 622 for_each_sgtable_sg((*sgt), sg, i) { 623 if (!sg->length) 624 continue; 625 626 dma_unmap_resource(dev, sg->dma_address, 627 sg->length, dir, 628 DMA_ATTR_SKIP_CPU_SYNC); 629 } 630 sg_free_table(*sgt); 631 632 error_free: 633 kfree(*sgt); 634 return r; 635 } 636 637 /** 638 * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table 639 * 640 * @dev: device pointer 641 * @dir: data direction of resource to unmap 642 * @sgt: sg table to free 643 * 644 * Free a previously allocate sg table. 645 */ 646 void amdgpu_vram_mgr_free_sgt(struct device *dev, 647 enum dma_data_direction dir, 648 struct sg_table *sgt) 649 { 650 struct scatterlist *sg; 651 int i; 652 653 for_each_sgtable_sg(sgt, sg, i) 654 dma_unmap_resource(dev, sg->dma_address, 655 sg->length, dir, 656 DMA_ATTR_SKIP_CPU_SYNC); 657 sg_free_table(sgt); 658 kfree(sgt); 659 } 660 661 /** 662 * amdgpu_vram_mgr_usage - how many bytes are used in this domain 663 * 664 * @man: TTM memory type manager 665 * 666 * Returns how many bytes are used in this domain. 667 */ 668 uint64_t amdgpu_vram_mgr_usage(struct ttm_resource_manager *man) 669 { 670 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 671 672 return atomic64_read(&mgr->usage); 673 } 674 675 /** 676 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part 677 * 678 * @man: TTM memory type manager 679 * 680 * Returns how many bytes are used in the visible part of VRAM 681 */ 682 uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_resource_manager *man) 683 { 684 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 685 686 return atomic64_read(&mgr->vis_usage); 687 } 688 689 /** 690 * amdgpu_vram_mgr_debug - dump VRAM table 691 * 692 * @man: TTM memory type manager 693 * @printer: DRM printer to use 694 * 695 * Dump the table content using printk. 696 */ 697 static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man, 698 struct drm_printer *printer) 699 { 700 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 701 702 spin_lock(&mgr->lock); 703 drm_mm_print(&mgr->mm, printer); 704 spin_unlock(&mgr->lock); 705 706 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n", 707 man->size, amdgpu_vram_mgr_usage(man) >> 20, 708 amdgpu_vram_mgr_vis_usage(man) >> 20); 709 } 710 711 static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = { 712 .alloc = amdgpu_vram_mgr_new, 713 .free = amdgpu_vram_mgr_del, 714 .debug = amdgpu_vram_mgr_debug 715 }; 716