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 struct amdgpu_vram_mgr { 32 struct drm_mm mm; 33 spinlock_t lock; 34 atomic64_t usage; 35 atomic64_t vis_usage; 36 }; 37 38 /** 39 * DOC: mem_info_vram_total 40 * 41 * The amdgpu driver provides a sysfs API for reporting current total VRAM 42 * available on the device 43 * The file mem_info_vram_total is used for this and returns the total 44 * amount of VRAM in bytes 45 */ 46 static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev, 47 struct device_attribute *attr, char *buf) 48 { 49 struct drm_device *ddev = dev_get_drvdata(dev); 50 struct amdgpu_device *adev = ddev->dev_private; 51 52 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.real_vram_size); 53 } 54 55 /** 56 * DOC: mem_info_vis_vram_total 57 * 58 * The amdgpu driver provides a sysfs API for reporting current total 59 * visible VRAM available on the device 60 * The file mem_info_vis_vram_total is used for this and returns the total 61 * amount of visible VRAM in bytes 62 */ 63 static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev, 64 struct device_attribute *attr, char *buf) 65 { 66 struct drm_device *ddev = dev_get_drvdata(dev); 67 struct amdgpu_device *adev = ddev->dev_private; 68 69 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.visible_vram_size); 70 } 71 72 /** 73 * DOC: mem_info_vram_used 74 * 75 * The amdgpu driver provides a sysfs API for reporting current total VRAM 76 * available on the device 77 * The file mem_info_vram_used is used for this and returns the total 78 * amount of currently used VRAM in bytes 79 */ 80 static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev, 81 struct device_attribute *attr, char *buf) 82 { 83 struct drm_device *ddev = dev_get_drvdata(dev); 84 struct amdgpu_device *adev = ddev->dev_private; 85 86 return snprintf(buf, PAGE_SIZE, "%llu\n", 87 amdgpu_vram_mgr_usage(&adev->mman.bdev.man[TTM_PL_VRAM])); 88 } 89 90 /** 91 * DOC: mem_info_vis_vram_used 92 * 93 * The amdgpu driver provides a sysfs API for reporting current total of 94 * used visible VRAM 95 * The file mem_info_vis_vram_used is used for this and returns the total 96 * amount of currently used visible VRAM in bytes 97 */ 98 static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev, 99 struct device_attribute *attr, char *buf) 100 { 101 struct drm_device *ddev = dev_get_drvdata(dev); 102 struct amdgpu_device *adev = ddev->dev_private; 103 104 return snprintf(buf, PAGE_SIZE, "%llu\n", 105 amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM])); 106 } 107 108 static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev, 109 struct device_attribute *attr, 110 char *buf) 111 { 112 struct drm_device *ddev = dev_get_drvdata(dev); 113 struct amdgpu_device *adev = ddev->dev_private; 114 115 switch (adev->gmc.vram_vendor) { 116 case SAMSUNG: 117 return snprintf(buf, PAGE_SIZE, "samsung\n"); 118 case INFINEON: 119 return snprintf(buf, PAGE_SIZE, "infineon\n"); 120 case ELPIDA: 121 return snprintf(buf, PAGE_SIZE, "elpida\n"); 122 case ETRON: 123 return snprintf(buf, PAGE_SIZE, "etron\n"); 124 case NANYA: 125 return snprintf(buf, PAGE_SIZE, "nanya\n"); 126 case HYNIX: 127 return snprintf(buf, PAGE_SIZE, "hynix\n"); 128 case MOSEL: 129 return snprintf(buf, PAGE_SIZE, "mosel\n"); 130 case WINBOND: 131 return snprintf(buf, PAGE_SIZE, "winbond\n"); 132 case ESMT: 133 return snprintf(buf, PAGE_SIZE, "esmt\n"); 134 case MICRON: 135 return snprintf(buf, PAGE_SIZE, "micron\n"); 136 default: 137 return snprintf(buf, PAGE_SIZE, "unknown\n"); 138 } 139 } 140 141 static DEVICE_ATTR(mem_info_vram_total, S_IRUGO, 142 amdgpu_mem_info_vram_total_show, NULL); 143 static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO, 144 amdgpu_mem_info_vis_vram_total_show,NULL); 145 static DEVICE_ATTR(mem_info_vram_used, S_IRUGO, 146 amdgpu_mem_info_vram_used_show, NULL); 147 static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO, 148 amdgpu_mem_info_vis_vram_used_show, NULL); 149 static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO, 150 amdgpu_mem_info_vram_vendor, NULL); 151 152 static const struct attribute *amdgpu_vram_mgr_attributes[] = { 153 &dev_attr_mem_info_vram_total.attr, 154 &dev_attr_mem_info_vis_vram_total.attr, 155 &dev_attr_mem_info_vram_used.attr, 156 &dev_attr_mem_info_vis_vram_used.attr, 157 &dev_attr_mem_info_vram_vendor.attr, 158 NULL 159 }; 160 161 /** 162 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM 163 * 164 * @man: TTM memory type manager 165 * @p_size: maximum size of VRAM 166 * 167 * Allocate and initialize the VRAM manager. 168 */ 169 static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man, 170 unsigned long p_size) 171 { 172 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev); 173 struct amdgpu_vram_mgr *mgr; 174 int ret; 175 176 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); 177 if (!mgr) 178 return -ENOMEM; 179 180 drm_mm_init(&mgr->mm, 0, p_size); 181 spin_lock_init(&mgr->lock); 182 man->priv = mgr; 183 184 /* Add the two VRAM-related sysfs files */ 185 ret = sysfs_create_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes); 186 if (ret) 187 DRM_ERROR("Failed to register sysfs\n"); 188 189 return 0; 190 } 191 192 /** 193 * amdgpu_vram_mgr_fini - free and destroy VRAM manager 194 * 195 * @man: TTM memory type manager 196 * 197 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still 198 * allocated inside it. 199 */ 200 static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man) 201 { 202 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev); 203 struct amdgpu_vram_mgr *mgr = man->priv; 204 205 spin_lock(&mgr->lock); 206 drm_mm_takedown(&mgr->mm); 207 spin_unlock(&mgr->lock); 208 kfree(mgr); 209 man->priv = NULL; 210 sysfs_remove_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes); 211 return 0; 212 } 213 214 /** 215 * amdgpu_vram_mgr_vis_size - Calculate visible node size 216 * 217 * @adev: amdgpu device structure 218 * @node: MM node structure 219 * 220 * Calculate how many bytes of the MM node are inside visible VRAM 221 */ 222 static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev, 223 struct drm_mm_node *node) 224 { 225 uint64_t start = node->start << PAGE_SHIFT; 226 uint64_t end = (node->size + node->start) << PAGE_SHIFT; 227 228 if (start >= adev->gmc.visible_vram_size) 229 return 0; 230 231 return (end > adev->gmc.visible_vram_size ? 232 adev->gmc.visible_vram_size : end) - start; 233 } 234 235 /** 236 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size 237 * 238 * @bo: &amdgpu_bo buffer object (must be in VRAM) 239 * 240 * Returns: 241 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM. 242 */ 243 u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo) 244 { 245 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 246 struct ttm_mem_reg *mem = &bo->tbo.mem; 247 struct drm_mm_node *nodes = mem->mm_node; 248 unsigned pages = mem->num_pages; 249 u64 usage; 250 251 if (amdgpu_gmc_vram_full_visible(&adev->gmc)) 252 return amdgpu_bo_size(bo); 253 254 if (mem->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT) 255 return 0; 256 257 for (usage = 0; nodes && pages; pages -= nodes->size, nodes++) 258 usage += amdgpu_vram_mgr_vis_size(adev, nodes); 259 260 return usage; 261 } 262 263 /** 264 * amdgpu_vram_mgr_virt_start - update virtual start address 265 * 266 * @mem: ttm_mem_reg to update 267 * @node: just allocated node 268 * 269 * Calculate a virtual BO start address to easily check if everything is CPU 270 * accessible. 271 */ 272 static void amdgpu_vram_mgr_virt_start(struct ttm_mem_reg *mem, 273 struct drm_mm_node *node) 274 { 275 unsigned long start; 276 277 start = node->start + node->size; 278 if (start > mem->num_pages) 279 start -= mem->num_pages; 280 else 281 start = 0; 282 mem->start = max(mem->start, start); 283 } 284 285 /** 286 * amdgpu_vram_mgr_new - allocate new ranges 287 * 288 * @man: TTM memory type manager 289 * @tbo: TTM BO we need this range for 290 * @place: placement flags and restrictions 291 * @mem: the resulting mem object 292 * 293 * Allocate VRAM for the given BO. 294 */ 295 static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man, 296 struct ttm_buffer_object *tbo, 297 const struct ttm_place *place, 298 struct ttm_mem_reg *mem) 299 { 300 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev); 301 struct amdgpu_vram_mgr *mgr = man->priv; 302 struct drm_mm *mm = &mgr->mm; 303 struct drm_mm_node *nodes; 304 enum drm_mm_insert_mode mode; 305 unsigned long lpfn, num_nodes, pages_per_node, pages_left; 306 uint64_t vis_usage = 0, mem_bytes, max_bytes; 307 unsigned i; 308 int r; 309 310 lpfn = place->lpfn; 311 if (!lpfn) 312 lpfn = man->size; 313 314 max_bytes = adev->gmc.mc_vram_size; 315 if (tbo->type != ttm_bo_type_kernel) 316 max_bytes -= AMDGPU_VM_RESERVED_VRAM; 317 318 /* bail out quickly if there's likely not enough VRAM for this BO */ 319 mem_bytes = (u64)mem->num_pages << PAGE_SHIFT; 320 if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) { 321 atomic64_sub(mem_bytes, &mgr->usage); 322 return -ENOSPC; 323 } 324 325 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { 326 pages_per_node = ~0ul; 327 num_nodes = 1; 328 } else { 329 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 330 pages_per_node = HPAGE_PMD_NR; 331 #else 332 /* default to 2MB */ 333 pages_per_node = (2UL << (20UL - PAGE_SHIFT)); 334 #endif 335 pages_per_node = max((uint32_t)pages_per_node, mem->page_alignment); 336 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node); 337 } 338 339 nodes = kvmalloc_array((uint32_t)num_nodes, sizeof(*nodes), 340 GFP_KERNEL | __GFP_ZERO); 341 if (!nodes) { 342 atomic64_sub(mem_bytes, &mgr->usage); 343 return -ENOMEM; 344 } 345 346 mode = DRM_MM_INSERT_BEST; 347 if (place->flags & TTM_PL_FLAG_TOPDOWN) 348 mode = DRM_MM_INSERT_HIGH; 349 350 mem->start = 0; 351 pages_left = mem->num_pages; 352 353 spin_lock(&mgr->lock); 354 for (i = 0; pages_left >= pages_per_node; ++i) { 355 unsigned long pages = rounddown_pow_of_two(pages_left); 356 357 r = drm_mm_insert_node_in_range(mm, &nodes[i], pages, 358 pages_per_node, 0, 359 place->fpfn, lpfn, 360 mode); 361 if (unlikely(r)) 362 break; 363 364 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]); 365 amdgpu_vram_mgr_virt_start(mem, &nodes[i]); 366 pages_left -= pages; 367 } 368 369 for (; pages_left; ++i) { 370 unsigned long pages = min(pages_left, pages_per_node); 371 uint32_t alignment = mem->page_alignment; 372 373 if (pages == pages_per_node) 374 alignment = pages_per_node; 375 376 r = drm_mm_insert_node_in_range(mm, &nodes[i], 377 pages, alignment, 0, 378 place->fpfn, lpfn, 379 mode); 380 if (unlikely(r)) 381 goto error; 382 383 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]); 384 amdgpu_vram_mgr_virt_start(mem, &nodes[i]); 385 pages_left -= pages; 386 } 387 spin_unlock(&mgr->lock); 388 389 atomic64_add(vis_usage, &mgr->vis_usage); 390 391 mem->mm_node = nodes; 392 393 return 0; 394 395 error: 396 while (i--) 397 drm_mm_remove_node(&nodes[i]); 398 spin_unlock(&mgr->lock); 399 atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage); 400 401 kvfree(nodes); 402 return r; 403 } 404 405 /** 406 * amdgpu_vram_mgr_del - free ranges 407 * 408 * @man: TTM memory type manager 409 * @mem: TTM memory object 410 * 411 * Free the allocated VRAM again. 412 */ 413 static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man, 414 struct ttm_mem_reg *mem) 415 { 416 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev); 417 struct amdgpu_vram_mgr *mgr = man->priv; 418 struct drm_mm_node *nodes = mem->mm_node; 419 uint64_t usage = 0, vis_usage = 0; 420 unsigned pages = mem->num_pages; 421 422 if (!mem->mm_node) 423 return; 424 425 spin_lock(&mgr->lock); 426 while (pages) { 427 pages -= nodes->size; 428 drm_mm_remove_node(nodes); 429 usage += nodes->size << PAGE_SHIFT; 430 vis_usage += amdgpu_vram_mgr_vis_size(adev, nodes); 431 ++nodes; 432 } 433 spin_unlock(&mgr->lock); 434 435 atomic64_sub(usage, &mgr->usage); 436 atomic64_sub(vis_usage, &mgr->vis_usage); 437 438 kvfree(mem->mm_node); 439 mem->mm_node = NULL; 440 } 441 442 /** 443 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table 444 * 445 * @adev: amdgpu device pointer 446 * @mem: TTM memory object 447 * @dev: the other device 448 * @dir: dma direction 449 * @sgt: resulting sg table 450 * 451 * Allocate and fill a sg table from a VRAM allocation. 452 */ 453 int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, 454 struct ttm_mem_reg *mem, 455 struct device *dev, 456 enum dma_data_direction dir, 457 struct sg_table **sgt) 458 { 459 struct drm_mm_node *node; 460 struct scatterlist *sg; 461 int num_entries = 0; 462 unsigned int pages; 463 int i, r; 464 465 *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL); 466 if (!*sgt) 467 return -ENOMEM; 468 469 for (pages = mem->num_pages, node = mem->mm_node; 470 pages; pages -= node->size, ++node) 471 ++num_entries; 472 473 r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL); 474 if (r) 475 goto error_free; 476 477 for_each_sgtable_sg((*sgt), sg, i) 478 sg->length = 0; 479 480 node = mem->mm_node; 481 for_each_sgtable_sg((*sgt), sg, i) { 482 phys_addr_t phys = (node->start << PAGE_SHIFT) + 483 adev->gmc.aper_base; 484 size_t size = node->size << PAGE_SHIFT; 485 dma_addr_t addr; 486 487 ++node; 488 addr = dma_map_resource(dev, phys, size, dir, 489 DMA_ATTR_SKIP_CPU_SYNC); 490 r = dma_mapping_error(dev, addr); 491 if (r) 492 goto error_unmap; 493 494 sg_set_page(sg, NULL, size, 0); 495 sg_dma_address(sg) = addr; 496 sg_dma_len(sg) = size; 497 } 498 return 0; 499 500 error_unmap: 501 for_each_sgtable_sg((*sgt), sg, i) { 502 if (!sg->length) 503 continue; 504 505 dma_unmap_resource(dev, sg->dma_address, 506 sg->length, dir, 507 DMA_ATTR_SKIP_CPU_SYNC); 508 } 509 sg_free_table(*sgt); 510 511 error_free: 512 kfree(*sgt); 513 return r; 514 } 515 516 /** 517 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table 518 * 519 * @adev: amdgpu device pointer 520 * @sgt: sg table to free 521 * 522 * Free a previously allocate sg table. 523 */ 524 void amdgpu_vram_mgr_free_sgt(struct amdgpu_device *adev, 525 struct device *dev, 526 enum dma_data_direction dir, 527 struct sg_table *sgt) 528 { 529 struct scatterlist *sg; 530 int i; 531 532 for_each_sgtable_sg(sgt, sg, i) 533 dma_unmap_resource(dev, sg->dma_address, 534 sg->length, dir, 535 DMA_ATTR_SKIP_CPU_SYNC); 536 sg_free_table(sgt); 537 kfree(sgt); 538 } 539 540 /** 541 * amdgpu_vram_mgr_usage - how many bytes are used in this domain 542 * 543 * @man: TTM memory type manager 544 * 545 * Returns how many bytes are used in this domain. 546 */ 547 uint64_t amdgpu_vram_mgr_usage(struct ttm_mem_type_manager *man) 548 { 549 struct amdgpu_vram_mgr *mgr = man->priv; 550 551 return atomic64_read(&mgr->usage); 552 } 553 554 /** 555 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part 556 * 557 * @man: TTM memory type manager 558 * 559 * Returns how many bytes are used in the visible part of VRAM 560 */ 561 uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_mem_type_manager *man) 562 { 563 struct amdgpu_vram_mgr *mgr = man->priv; 564 565 return atomic64_read(&mgr->vis_usage); 566 } 567 568 /** 569 * amdgpu_vram_mgr_debug - dump VRAM table 570 * 571 * @man: TTM memory type manager 572 * @printer: DRM printer to use 573 * 574 * Dump the table content using printk. 575 */ 576 static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man, 577 struct drm_printer *printer) 578 { 579 struct amdgpu_vram_mgr *mgr = man->priv; 580 581 spin_lock(&mgr->lock); 582 drm_mm_print(&mgr->mm, printer); 583 spin_unlock(&mgr->lock); 584 585 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n", 586 man->size, amdgpu_vram_mgr_usage(man) >> 20, 587 amdgpu_vram_mgr_vis_usage(man) >> 20); 588 } 589 590 const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func = { 591 .init = amdgpu_vram_mgr_init, 592 .takedown = amdgpu_vram_mgr_fini, 593 .get_node = amdgpu_vram_mgr_new, 594 .put_node = amdgpu_vram_mgr_del, 595 .debug = amdgpu_vram_mgr_debug 596 }; 597