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_res_cursor.h" 29 #include "amdgpu_atomfirmware.h" 30 #include "atom.h" 31 32 struct amdgpu_vram_reservation { 33 struct list_head node; 34 struct drm_mm_node mm_node; 35 }; 36 37 static inline struct amdgpu_vram_mgr * 38 to_vram_mgr(struct ttm_resource_manager *man) 39 { 40 return container_of(man, struct amdgpu_vram_mgr, manager); 41 } 42 43 static inline struct amdgpu_device * 44 to_amdgpu_device(struct amdgpu_vram_mgr *mgr) 45 { 46 return container_of(mgr, struct amdgpu_device, mman.vram_mgr); 47 } 48 49 /** 50 * DOC: mem_info_vram_total 51 * 52 * The amdgpu driver provides a sysfs API for reporting current total VRAM 53 * available on the device 54 * The file mem_info_vram_total is used for this and returns the total 55 * amount of VRAM in bytes 56 */ 57 static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev, 58 struct device_attribute *attr, char *buf) 59 { 60 struct drm_device *ddev = dev_get_drvdata(dev); 61 struct amdgpu_device *adev = drm_to_adev(ddev); 62 63 return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size); 64 } 65 66 /** 67 * DOC: mem_info_vis_vram_total 68 * 69 * The amdgpu driver provides a sysfs API for reporting current total 70 * visible VRAM available on the device 71 * The file mem_info_vis_vram_total is used for this and returns the total 72 * amount of visible VRAM in bytes 73 */ 74 static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev, 75 struct device_attribute *attr, char *buf) 76 { 77 struct drm_device *ddev = dev_get_drvdata(dev); 78 struct amdgpu_device *adev = drm_to_adev(ddev); 79 80 return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size); 81 } 82 83 /** 84 * DOC: mem_info_vram_used 85 * 86 * The amdgpu driver provides a sysfs API for reporting current total VRAM 87 * available on the device 88 * The file mem_info_vram_used is used for this and returns the total 89 * amount of currently used VRAM in bytes 90 */ 91 static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev, 92 struct device_attribute *attr, 93 char *buf) 94 { 95 struct drm_device *ddev = dev_get_drvdata(dev); 96 struct amdgpu_device *adev = drm_to_adev(ddev); 97 struct ttm_resource_manager *man; 98 99 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM); 100 return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_usage(man)); 101 } 102 103 /** 104 * DOC: mem_info_vis_vram_used 105 * 106 * The amdgpu driver provides a sysfs API for reporting current total of 107 * used visible VRAM 108 * The file mem_info_vis_vram_used is used for this and returns the total 109 * amount of currently used visible VRAM in bytes 110 */ 111 static ssize_t amdgpu_mem_info_vis_vram_used_show(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 struct ttm_resource_manager *man; 118 119 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM); 120 return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_vis_usage(man)); 121 } 122 123 /** 124 * DOC: mem_info_vram_vendor 125 * 126 * The amdgpu driver provides a sysfs API for reporting the vendor of the 127 * installed VRAM 128 * The file mem_info_vram_vendor is used for this and returns the name of the 129 * vendor. 130 */ 131 static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev, 132 struct device_attribute *attr, 133 char *buf) 134 { 135 struct drm_device *ddev = dev_get_drvdata(dev); 136 struct amdgpu_device *adev = drm_to_adev(ddev); 137 138 switch (adev->gmc.vram_vendor) { 139 case SAMSUNG: 140 return sysfs_emit(buf, "samsung\n"); 141 case INFINEON: 142 return sysfs_emit(buf, "infineon\n"); 143 case ELPIDA: 144 return sysfs_emit(buf, "elpida\n"); 145 case ETRON: 146 return sysfs_emit(buf, "etron\n"); 147 case NANYA: 148 return sysfs_emit(buf, "nanya\n"); 149 case HYNIX: 150 return sysfs_emit(buf, "hynix\n"); 151 case MOSEL: 152 return sysfs_emit(buf, "mosel\n"); 153 case WINBOND: 154 return sysfs_emit(buf, "winbond\n"); 155 case ESMT: 156 return sysfs_emit(buf, "esmt\n"); 157 case MICRON: 158 return sysfs_emit(buf, "micron\n"); 159 default: 160 return sysfs_emit(buf, "unknown\n"); 161 } 162 } 163 164 static DEVICE_ATTR(mem_info_vram_total, S_IRUGO, 165 amdgpu_mem_info_vram_total_show, NULL); 166 static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO, 167 amdgpu_mem_info_vis_vram_total_show,NULL); 168 static DEVICE_ATTR(mem_info_vram_used, S_IRUGO, 169 amdgpu_mem_info_vram_used_show, NULL); 170 static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO, 171 amdgpu_mem_info_vis_vram_used_show, NULL); 172 static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO, 173 amdgpu_mem_info_vram_vendor, NULL); 174 175 static struct attribute *amdgpu_vram_mgr_attributes[] = { 176 &dev_attr_mem_info_vram_total.attr, 177 &dev_attr_mem_info_vis_vram_total.attr, 178 &dev_attr_mem_info_vram_used.attr, 179 &dev_attr_mem_info_vis_vram_used.attr, 180 &dev_attr_mem_info_vram_vendor.attr, 181 NULL 182 }; 183 184 const struct attribute_group amdgpu_vram_mgr_attr_group = { 185 .attrs = amdgpu_vram_mgr_attributes 186 }; 187 188 /** 189 * amdgpu_vram_mgr_vis_size - Calculate visible node size 190 * 191 * @adev: amdgpu_device pointer 192 * @node: MM node structure 193 * 194 * Calculate how many bytes of the MM node are inside visible VRAM 195 */ 196 static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev, 197 struct drm_mm_node *node) 198 { 199 uint64_t start = node->start << PAGE_SHIFT; 200 uint64_t end = (node->size + node->start) << PAGE_SHIFT; 201 202 if (start >= adev->gmc.visible_vram_size) 203 return 0; 204 205 return (end > adev->gmc.visible_vram_size ? 206 adev->gmc.visible_vram_size : end) - start; 207 } 208 209 /** 210 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size 211 * 212 * @bo: &amdgpu_bo buffer object (must be in VRAM) 213 * 214 * Returns: 215 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM. 216 */ 217 u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo) 218 { 219 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 220 struct ttm_resource *mem = &bo->tbo.mem; 221 struct drm_mm_node *nodes = mem->mm_node; 222 unsigned pages = mem->num_pages; 223 u64 usage; 224 225 if (amdgpu_gmc_vram_full_visible(&adev->gmc)) 226 return amdgpu_bo_size(bo); 227 228 if (mem->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT) 229 return 0; 230 231 for (usage = 0; nodes && pages; pages -= nodes->size, nodes++) 232 usage += amdgpu_vram_mgr_vis_size(adev, nodes); 233 234 return usage; 235 } 236 237 /* Commit the reservation of VRAM pages */ 238 static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man) 239 { 240 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 241 struct amdgpu_device *adev = to_amdgpu_device(mgr); 242 struct drm_mm *mm = &mgr->mm; 243 struct amdgpu_vram_reservation *rsv, *temp; 244 uint64_t vis_usage; 245 246 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) { 247 if (drm_mm_reserve_node(mm, &rsv->mm_node)) 248 continue; 249 250 dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n", 251 rsv->mm_node.start, rsv->mm_node.size); 252 253 vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node); 254 atomic64_add(vis_usage, &mgr->vis_usage); 255 atomic64_add(rsv->mm_node.size << PAGE_SHIFT, &mgr->usage); 256 list_move(&rsv->node, &mgr->reserved_pages); 257 } 258 } 259 260 /** 261 * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM 262 * 263 * @man: TTM memory type manager 264 * @start: start address of the range in VRAM 265 * @size: size of the range 266 * 267 * Reserve memory from start addess with the specified size in VRAM 268 */ 269 int amdgpu_vram_mgr_reserve_range(struct ttm_resource_manager *man, 270 uint64_t start, uint64_t size) 271 { 272 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 273 struct amdgpu_vram_reservation *rsv; 274 275 rsv = kzalloc(sizeof(*rsv), GFP_KERNEL); 276 if (!rsv) 277 return -ENOMEM; 278 279 INIT_LIST_HEAD(&rsv->node); 280 rsv->mm_node.start = start >> PAGE_SHIFT; 281 rsv->mm_node.size = size >> PAGE_SHIFT; 282 283 spin_lock(&mgr->lock); 284 list_add_tail(&mgr->reservations_pending, &rsv->node); 285 amdgpu_vram_mgr_do_reserve(man); 286 spin_unlock(&mgr->lock); 287 288 return 0; 289 } 290 291 /** 292 * amdgpu_vram_mgr_query_page_status - query the reservation status 293 * 294 * @man: TTM memory type manager 295 * @start: start address of a page in VRAM 296 * 297 * Returns: 298 * -EBUSY: the page is still hold and in pending list 299 * 0: the page has been reserved 300 * -ENOENT: the input page is not a reservation 301 */ 302 int amdgpu_vram_mgr_query_page_status(struct ttm_resource_manager *man, 303 uint64_t start) 304 { 305 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 306 struct amdgpu_vram_reservation *rsv; 307 int ret; 308 309 spin_lock(&mgr->lock); 310 311 list_for_each_entry(rsv, &mgr->reservations_pending, node) { 312 if ((rsv->mm_node.start <= start) && 313 (start < (rsv->mm_node.start + rsv->mm_node.size))) { 314 ret = -EBUSY; 315 goto out; 316 } 317 } 318 319 list_for_each_entry(rsv, &mgr->reserved_pages, node) { 320 if ((rsv->mm_node.start <= start) && 321 (start < (rsv->mm_node.start + rsv->mm_node.size))) { 322 ret = 0; 323 goto out; 324 } 325 } 326 327 ret = -ENOENT; 328 out: 329 spin_unlock(&mgr->lock); 330 return ret; 331 } 332 333 /** 334 * amdgpu_vram_mgr_virt_start - update virtual start address 335 * 336 * @mem: ttm_resource to update 337 * @node: just allocated node 338 * 339 * Calculate a virtual BO start address to easily check if everything is CPU 340 * accessible. 341 */ 342 static void amdgpu_vram_mgr_virt_start(struct ttm_resource *mem, 343 struct drm_mm_node *node) 344 { 345 unsigned long start; 346 347 start = node->start + node->size; 348 if (start > mem->num_pages) 349 start -= mem->num_pages; 350 else 351 start = 0; 352 mem->start = max(mem->start, start); 353 } 354 355 /** 356 * amdgpu_vram_mgr_new - allocate new ranges 357 * 358 * @man: TTM memory type manager 359 * @tbo: TTM BO we need this range for 360 * @place: placement flags and restrictions 361 * @mem: the resulting mem object 362 * 363 * Allocate VRAM for the given BO. 364 */ 365 static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, 366 struct ttm_buffer_object *tbo, 367 const struct ttm_place *place, 368 struct ttm_resource *mem) 369 { 370 unsigned long lpfn, num_nodes, pages_per_node, pages_left, pages; 371 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 372 struct amdgpu_device *adev = to_amdgpu_device(mgr); 373 uint64_t vis_usage = 0, mem_bytes, max_bytes; 374 struct drm_mm *mm = &mgr->mm; 375 enum drm_mm_insert_mode mode; 376 struct drm_mm_node *nodes; 377 unsigned i; 378 int r; 379 380 lpfn = place->lpfn; 381 if (!lpfn) 382 lpfn = man->size; 383 384 max_bytes = adev->gmc.mc_vram_size; 385 if (tbo->type != ttm_bo_type_kernel) 386 max_bytes -= AMDGPU_VM_RESERVED_VRAM; 387 388 /* bail out quickly if there's likely not enough VRAM for this BO */ 389 mem_bytes = (u64)mem->num_pages << PAGE_SHIFT; 390 if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) { 391 atomic64_sub(mem_bytes, &mgr->usage); 392 return -ENOSPC; 393 } 394 395 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { 396 pages_per_node = ~0ul; 397 num_nodes = 1; 398 } else { 399 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 400 pages_per_node = HPAGE_PMD_NR; 401 #else 402 /* default to 2MB */ 403 pages_per_node = 2UL << (20UL - PAGE_SHIFT); 404 #endif 405 pages_per_node = max_t(uint32_t, pages_per_node, 406 tbo->page_alignment); 407 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node); 408 } 409 410 nodes = kvmalloc_array((uint32_t)num_nodes, sizeof(*nodes), 411 GFP_KERNEL | __GFP_ZERO); 412 if (!nodes) { 413 atomic64_sub(mem_bytes, &mgr->usage); 414 return -ENOMEM; 415 } 416 417 mode = DRM_MM_INSERT_BEST; 418 if (place->flags & TTM_PL_FLAG_TOPDOWN) 419 mode = DRM_MM_INSERT_HIGH; 420 421 mem->start = 0; 422 pages_left = mem->num_pages; 423 424 /* Limit maximum size to 2GB due to SG table limitations */ 425 pages = min(pages_left, 2UL << (30 - PAGE_SHIFT)); 426 427 i = 0; 428 spin_lock(&mgr->lock); 429 while (pages_left) { 430 uint32_t alignment = tbo->page_alignment; 431 432 if (pages >= pages_per_node) 433 alignment = pages_per_node; 434 435 r = drm_mm_insert_node_in_range(mm, &nodes[i], pages, alignment, 436 0, place->fpfn, lpfn, mode); 437 if (unlikely(r)) { 438 if (pages > pages_per_node) { 439 if (is_power_of_2(pages)) 440 pages = pages / 2; 441 else 442 pages = rounddown_pow_of_two(pages); 443 continue; 444 } 445 goto error; 446 } 447 448 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]); 449 amdgpu_vram_mgr_virt_start(mem, &nodes[i]); 450 pages_left -= pages; 451 ++i; 452 453 if (pages > pages_left) 454 pages = pages_left; 455 } 456 spin_unlock(&mgr->lock); 457 458 if (i == 1) 459 mem->placement |= TTM_PL_FLAG_CONTIGUOUS; 460 461 atomic64_add(vis_usage, &mgr->vis_usage); 462 mem->mm_node = nodes; 463 return 0; 464 465 error: 466 while (i--) 467 drm_mm_remove_node(&nodes[i]); 468 spin_unlock(&mgr->lock); 469 atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage); 470 471 kvfree(nodes); 472 return r; 473 } 474 475 /** 476 * amdgpu_vram_mgr_del - free ranges 477 * 478 * @man: TTM memory type manager 479 * @mem: TTM memory object 480 * 481 * Free the allocated VRAM again. 482 */ 483 static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man, 484 struct ttm_resource *mem) 485 { 486 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 487 struct amdgpu_device *adev = to_amdgpu_device(mgr); 488 struct drm_mm_node *nodes = mem->mm_node; 489 uint64_t usage = 0, vis_usage = 0; 490 unsigned pages = mem->num_pages; 491 492 if (!mem->mm_node) 493 return; 494 495 spin_lock(&mgr->lock); 496 while (pages) { 497 pages -= nodes->size; 498 drm_mm_remove_node(nodes); 499 usage += nodes->size << PAGE_SHIFT; 500 vis_usage += amdgpu_vram_mgr_vis_size(adev, nodes); 501 ++nodes; 502 } 503 amdgpu_vram_mgr_do_reserve(man); 504 spin_unlock(&mgr->lock); 505 506 atomic64_sub(usage, &mgr->usage); 507 atomic64_sub(vis_usage, &mgr->vis_usage); 508 509 kvfree(mem->mm_node); 510 mem->mm_node = NULL; 511 } 512 513 /** 514 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table 515 * 516 * @adev: amdgpu device pointer 517 * @mem: TTM memory object 518 * @offset: byte offset from the base of VRAM BO 519 * @length: number of bytes to export in sg_table 520 * @dev: the other device 521 * @dir: dma direction 522 * @sgt: resulting sg table 523 * 524 * Allocate and fill a sg table from a VRAM allocation. 525 */ 526 int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, 527 struct ttm_resource *mem, 528 u64 offset, u64 length, 529 struct device *dev, 530 enum dma_data_direction dir, 531 struct sg_table **sgt) 532 { 533 struct amdgpu_res_cursor cursor; 534 struct scatterlist *sg; 535 int num_entries = 0; 536 int i, r; 537 538 *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL); 539 if (!*sgt) 540 return -ENOMEM; 541 542 /* Determine the number of DRM_MM nodes to export */ 543 amdgpu_res_first(mem, offset, length, &cursor); 544 while (cursor.remaining) { 545 num_entries++; 546 amdgpu_res_next(&cursor, cursor.size); 547 } 548 549 r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL); 550 if (r) 551 goto error_free; 552 553 /* Initialize scatterlist nodes of sg_table */ 554 for_each_sgtable_sg((*sgt), sg, i) 555 sg->length = 0; 556 557 /* 558 * Walk down DRM_MM nodes to populate scatterlist nodes 559 * @note: Use iterator api to get first the DRM_MM node 560 * and the number of bytes from it. Access the following 561 * DRM_MM node(s) if more buffer needs to exported 562 */ 563 amdgpu_res_first(mem, offset, length, &cursor); 564 for_each_sgtable_sg((*sgt), sg, i) { 565 phys_addr_t phys = cursor.start + adev->gmc.aper_base; 566 size_t size = cursor.size; 567 dma_addr_t addr; 568 569 addr = dma_map_resource(dev, phys, size, dir, 570 DMA_ATTR_SKIP_CPU_SYNC); 571 r = dma_mapping_error(dev, addr); 572 if (r) 573 goto error_unmap; 574 575 sg_set_page(sg, NULL, size, 0); 576 sg_dma_address(sg) = addr; 577 sg_dma_len(sg) = size; 578 579 amdgpu_res_next(&cursor, cursor.size); 580 } 581 582 return 0; 583 584 error_unmap: 585 for_each_sgtable_sg((*sgt), sg, i) { 586 if (!sg->length) 587 continue; 588 589 dma_unmap_resource(dev, sg->dma_address, 590 sg->length, dir, 591 DMA_ATTR_SKIP_CPU_SYNC); 592 } 593 sg_free_table(*sgt); 594 595 error_free: 596 kfree(*sgt); 597 return r; 598 } 599 600 /** 601 * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table 602 * 603 * @dev: device pointer 604 * @dir: data direction of resource to unmap 605 * @sgt: sg table to free 606 * 607 * Free a previously allocate sg table. 608 */ 609 void amdgpu_vram_mgr_free_sgt(struct device *dev, 610 enum dma_data_direction dir, 611 struct sg_table *sgt) 612 { 613 struct scatterlist *sg; 614 int i; 615 616 for_each_sgtable_sg(sgt, sg, i) 617 dma_unmap_resource(dev, sg->dma_address, 618 sg->length, dir, 619 DMA_ATTR_SKIP_CPU_SYNC); 620 sg_free_table(sgt); 621 kfree(sgt); 622 } 623 624 /** 625 * amdgpu_vram_mgr_usage - how many bytes are used in this domain 626 * 627 * @man: TTM memory type manager 628 * 629 * Returns how many bytes are used in this domain. 630 */ 631 uint64_t amdgpu_vram_mgr_usage(struct ttm_resource_manager *man) 632 { 633 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 634 635 return atomic64_read(&mgr->usage); 636 } 637 638 /** 639 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part 640 * 641 * @man: TTM memory type manager 642 * 643 * Returns how many bytes are used in the visible part of VRAM 644 */ 645 uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_resource_manager *man) 646 { 647 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 648 649 return atomic64_read(&mgr->vis_usage); 650 } 651 652 /** 653 * amdgpu_vram_mgr_debug - dump VRAM table 654 * 655 * @man: TTM memory type manager 656 * @printer: DRM printer to use 657 * 658 * Dump the table content using printk. 659 */ 660 static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man, 661 struct drm_printer *printer) 662 { 663 struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); 664 665 spin_lock(&mgr->lock); 666 drm_mm_print(&mgr->mm, printer); 667 spin_unlock(&mgr->lock); 668 669 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n", 670 man->size, amdgpu_vram_mgr_usage(man) >> 20, 671 amdgpu_vram_mgr_vis_usage(man) >> 20); 672 } 673 674 static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = { 675 .alloc = amdgpu_vram_mgr_new, 676 .free = amdgpu_vram_mgr_del, 677 .debug = amdgpu_vram_mgr_debug 678 }; 679 680 /** 681 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM 682 * 683 * @adev: amdgpu_device pointer 684 * 685 * Allocate and initialize the VRAM manager. 686 */ 687 int amdgpu_vram_mgr_init(struct amdgpu_device *adev) 688 { 689 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; 690 struct ttm_resource_manager *man = &mgr->manager; 691 692 ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT); 693 694 man->func = &amdgpu_vram_mgr_func; 695 696 drm_mm_init(&mgr->mm, 0, man->size); 697 spin_lock_init(&mgr->lock); 698 INIT_LIST_HEAD(&mgr->reservations_pending); 699 INIT_LIST_HEAD(&mgr->reserved_pages); 700 701 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager); 702 ttm_resource_manager_set_used(man, true); 703 return 0; 704 } 705 706 /** 707 * amdgpu_vram_mgr_fini - free and destroy VRAM manager 708 * 709 * @adev: amdgpu_device pointer 710 * 711 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still 712 * allocated inside it. 713 */ 714 void amdgpu_vram_mgr_fini(struct amdgpu_device *adev) 715 { 716 struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; 717 struct ttm_resource_manager *man = &mgr->manager; 718 int ret; 719 struct amdgpu_vram_reservation *rsv, *temp; 720 721 ttm_resource_manager_set_used(man, false); 722 723 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); 724 if (ret) 725 return; 726 727 spin_lock(&mgr->lock); 728 list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) 729 kfree(rsv); 730 731 list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) { 732 drm_mm_remove_node(&rsv->mm_node); 733 kfree(rsv); 734 } 735 drm_mm_takedown(&mgr->mm); 736 spin_unlock(&mgr->lock); 737 738 ttm_resource_manager_cleanup(man); 739 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL); 740 } 741