1 /* 2 * Copyright 2014 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 23 #include <linux/types.h> 24 #include <linux/kernel.h> 25 #include <linux/pci.h> 26 #include <linux/errno.h> 27 #include <linux/acpi.h> 28 #include <linux/hash.h> 29 #include <linux/cpufreq.h> 30 #include <linux/log2.h> 31 #include <linux/dmi.h> 32 #include <linux/atomic.h> 33 34 #include "kfd_priv.h" 35 #include "kfd_crat.h" 36 #include "kfd_topology.h" 37 #include "kfd_device_queue_manager.h" 38 #include "kfd_iommu.h" 39 40 /* topology_device_list - Master list of all topology devices */ 41 static struct list_head topology_device_list; 42 static struct kfd_system_properties sys_props; 43 44 static DECLARE_RWSEM(topology_lock); 45 static atomic_t topology_crat_proximity_domain; 46 47 struct kfd_topology_device *kfd_topology_device_by_proximity_domain( 48 uint32_t proximity_domain) 49 { 50 struct kfd_topology_device *top_dev; 51 struct kfd_topology_device *device = NULL; 52 53 down_read(&topology_lock); 54 55 list_for_each_entry(top_dev, &topology_device_list, list) 56 if (top_dev->proximity_domain == proximity_domain) { 57 device = top_dev; 58 break; 59 } 60 61 up_read(&topology_lock); 62 63 return device; 64 } 65 66 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id) 67 { 68 struct kfd_topology_device *top_dev; 69 struct kfd_dev *device = NULL; 70 71 down_read(&topology_lock); 72 73 list_for_each_entry(top_dev, &topology_device_list, list) 74 if (top_dev->gpu_id == gpu_id) { 75 device = top_dev->gpu; 76 break; 77 } 78 79 up_read(&topology_lock); 80 81 return device; 82 } 83 84 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev) 85 { 86 struct kfd_topology_device *top_dev; 87 struct kfd_dev *device = NULL; 88 89 down_read(&topology_lock); 90 91 list_for_each_entry(top_dev, &topology_device_list, list) 92 if (top_dev->gpu->pdev == pdev) { 93 device = top_dev->gpu; 94 break; 95 } 96 97 up_read(&topology_lock); 98 99 return device; 100 } 101 102 /* Called with write topology_lock acquired */ 103 static void kfd_release_topology_device(struct kfd_topology_device *dev) 104 { 105 struct kfd_mem_properties *mem; 106 struct kfd_cache_properties *cache; 107 struct kfd_iolink_properties *iolink; 108 struct kfd_perf_properties *perf; 109 110 list_del(&dev->list); 111 112 while (dev->mem_props.next != &dev->mem_props) { 113 mem = container_of(dev->mem_props.next, 114 struct kfd_mem_properties, list); 115 list_del(&mem->list); 116 kfree(mem); 117 } 118 119 while (dev->cache_props.next != &dev->cache_props) { 120 cache = container_of(dev->cache_props.next, 121 struct kfd_cache_properties, list); 122 list_del(&cache->list); 123 kfree(cache); 124 } 125 126 while (dev->io_link_props.next != &dev->io_link_props) { 127 iolink = container_of(dev->io_link_props.next, 128 struct kfd_iolink_properties, list); 129 list_del(&iolink->list); 130 kfree(iolink); 131 } 132 133 while (dev->perf_props.next != &dev->perf_props) { 134 perf = container_of(dev->perf_props.next, 135 struct kfd_perf_properties, list); 136 list_del(&perf->list); 137 kfree(perf); 138 } 139 140 kfree(dev); 141 } 142 143 void kfd_release_topology_device_list(struct list_head *device_list) 144 { 145 struct kfd_topology_device *dev; 146 147 while (!list_empty(device_list)) { 148 dev = list_first_entry(device_list, 149 struct kfd_topology_device, list); 150 kfd_release_topology_device(dev); 151 } 152 } 153 154 static void kfd_release_live_view(void) 155 { 156 kfd_release_topology_device_list(&topology_device_list); 157 memset(&sys_props, 0, sizeof(sys_props)); 158 } 159 160 struct kfd_topology_device *kfd_create_topology_device( 161 struct list_head *device_list) 162 { 163 struct kfd_topology_device *dev; 164 165 dev = kfd_alloc_struct(dev); 166 if (!dev) { 167 pr_err("No memory to allocate a topology device"); 168 return NULL; 169 } 170 171 INIT_LIST_HEAD(&dev->mem_props); 172 INIT_LIST_HEAD(&dev->cache_props); 173 INIT_LIST_HEAD(&dev->io_link_props); 174 INIT_LIST_HEAD(&dev->perf_props); 175 176 list_add_tail(&dev->list, device_list); 177 178 return dev; 179 } 180 181 182 #define sysfs_show_gen_prop(buffer, fmt, ...) \ 183 snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__) 184 #define sysfs_show_32bit_prop(buffer, name, value) \ 185 sysfs_show_gen_prop(buffer, "%s %u\n", name, value) 186 #define sysfs_show_64bit_prop(buffer, name, value) \ 187 sysfs_show_gen_prop(buffer, "%s %llu\n", name, value) 188 #define sysfs_show_32bit_val(buffer, value) \ 189 sysfs_show_gen_prop(buffer, "%u\n", value) 190 #define sysfs_show_str_val(buffer, value) \ 191 sysfs_show_gen_prop(buffer, "%s\n", value) 192 193 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr, 194 char *buffer) 195 { 196 ssize_t ret; 197 198 /* Making sure that the buffer is an empty string */ 199 buffer[0] = 0; 200 201 if (attr == &sys_props.attr_genid) { 202 ret = sysfs_show_32bit_val(buffer, sys_props.generation_count); 203 } else if (attr == &sys_props.attr_props) { 204 sysfs_show_64bit_prop(buffer, "platform_oem", 205 sys_props.platform_oem); 206 sysfs_show_64bit_prop(buffer, "platform_id", 207 sys_props.platform_id); 208 ret = sysfs_show_64bit_prop(buffer, "platform_rev", 209 sys_props.platform_rev); 210 } else { 211 ret = -EINVAL; 212 } 213 214 return ret; 215 } 216 217 static void kfd_topology_kobj_release(struct kobject *kobj) 218 { 219 kfree(kobj); 220 } 221 222 static const struct sysfs_ops sysprops_ops = { 223 .show = sysprops_show, 224 }; 225 226 static struct kobj_type sysprops_type = { 227 .release = kfd_topology_kobj_release, 228 .sysfs_ops = &sysprops_ops, 229 }; 230 231 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr, 232 char *buffer) 233 { 234 ssize_t ret; 235 struct kfd_iolink_properties *iolink; 236 237 /* Making sure that the buffer is an empty string */ 238 buffer[0] = 0; 239 240 iolink = container_of(attr, struct kfd_iolink_properties, attr); 241 sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type); 242 sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj); 243 sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min); 244 sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from); 245 sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to); 246 sysfs_show_32bit_prop(buffer, "weight", iolink->weight); 247 sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency); 248 sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency); 249 sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth); 250 sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth); 251 sysfs_show_32bit_prop(buffer, "recommended_transfer_size", 252 iolink->rec_transfer_size); 253 ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags); 254 255 return ret; 256 } 257 258 static const struct sysfs_ops iolink_ops = { 259 .show = iolink_show, 260 }; 261 262 static struct kobj_type iolink_type = { 263 .release = kfd_topology_kobj_release, 264 .sysfs_ops = &iolink_ops, 265 }; 266 267 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr, 268 char *buffer) 269 { 270 ssize_t ret; 271 struct kfd_mem_properties *mem; 272 273 /* Making sure that the buffer is an empty string */ 274 buffer[0] = 0; 275 276 mem = container_of(attr, struct kfd_mem_properties, attr); 277 sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type); 278 sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes); 279 sysfs_show_32bit_prop(buffer, "flags", mem->flags); 280 sysfs_show_32bit_prop(buffer, "width", mem->width); 281 ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max); 282 283 return ret; 284 } 285 286 static const struct sysfs_ops mem_ops = { 287 .show = mem_show, 288 }; 289 290 static struct kobj_type mem_type = { 291 .release = kfd_topology_kobj_release, 292 .sysfs_ops = &mem_ops, 293 }; 294 295 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr, 296 char *buffer) 297 { 298 ssize_t ret; 299 uint32_t i, j; 300 struct kfd_cache_properties *cache; 301 302 /* Making sure that the buffer is an empty string */ 303 buffer[0] = 0; 304 305 cache = container_of(attr, struct kfd_cache_properties, attr); 306 sysfs_show_32bit_prop(buffer, "processor_id_low", 307 cache->processor_id_low); 308 sysfs_show_32bit_prop(buffer, "level", cache->cache_level); 309 sysfs_show_32bit_prop(buffer, "size", cache->cache_size); 310 sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size); 311 sysfs_show_32bit_prop(buffer, "cache_lines_per_tag", 312 cache->cachelines_per_tag); 313 sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc); 314 sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency); 315 sysfs_show_32bit_prop(buffer, "type", cache->cache_type); 316 snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer); 317 for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++) 318 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++) { 319 /* Check each bit */ 320 if (cache->sibling_map[i] & (1 << j)) 321 ret = snprintf(buffer, PAGE_SIZE, 322 "%s%d%s", buffer, 1, ","); 323 else 324 ret = snprintf(buffer, PAGE_SIZE, 325 "%s%d%s", buffer, 0, ","); 326 } 327 /* Replace the last "," with end of line */ 328 *(buffer + strlen(buffer) - 1) = 0xA; 329 return ret; 330 } 331 332 static const struct sysfs_ops cache_ops = { 333 .show = kfd_cache_show, 334 }; 335 336 static struct kobj_type cache_type = { 337 .release = kfd_topology_kobj_release, 338 .sysfs_ops = &cache_ops, 339 }; 340 341 /****** Sysfs of Performance Counters ******/ 342 343 struct kfd_perf_attr { 344 struct kobj_attribute attr; 345 uint32_t data; 346 }; 347 348 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs, 349 char *buf) 350 { 351 struct kfd_perf_attr *attr; 352 353 buf[0] = 0; 354 attr = container_of(attrs, struct kfd_perf_attr, attr); 355 if (!attr->data) /* invalid data for PMC */ 356 return 0; 357 else 358 return sysfs_show_32bit_val(buf, attr->data); 359 } 360 361 #define KFD_PERF_DESC(_name, _data) \ 362 { \ 363 .attr = __ATTR(_name, 0444, perf_show, NULL), \ 364 .data = _data, \ 365 } 366 367 static struct kfd_perf_attr perf_attr_iommu[] = { 368 KFD_PERF_DESC(max_concurrent, 0), 369 KFD_PERF_DESC(num_counters, 0), 370 KFD_PERF_DESC(counter_ids, 0), 371 }; 372 /****************************************/ 373 374 static ssize_t node_show(struct kobject *kobj, struct attribute *attr, 375 char *buffer) 376 { 377 struct kfd_topology_device *dev; 378 char public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE]; 379 uint32_t i; 380 uint32_t log_max_watch_addr; 381 382 /* Making sure that the buffer is an empty string */ 383 buffer[0] = 0; 384 385 if (strcmp(attr->name, "gpu_id") == 0) { 386 dev = container_of(attr, struct kfd_topology_device, 387 attr_gpuid); 388 return sysfs_show_32bit_val(buffer, dev->gpu_id); 389 } 390 391 if (strcmp(attr->name, "name") == 0) { 392 dev = container_of(attr, struct kfd_topology_device, 393 attr_name); 394 for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE; i++) { 395 public_name[i] = 396 (char)dev->node_props.marketing_name[i]; 397 if (dev->node_props.marketing_name[i] == 0) 398 break; 399 } 400 public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1] = 0x0; 401 return sysfs_show_str_val(buffer, public_name); 402 } 403 404 dev = container_of(attr, struct kfd_topology_device, 405 attr_props); 406 sysfs_show_32bit_prop(buffer, "cpu_cores_count", 407 dev->node_props.cpu_cores_count); 408 sysfs_show_32bit_prop(buffer, "simd_count", 409 dev->node_props.simd_count); 410 sysfs_show_32bit_prop(buffer, "mem_banks_count", 411 dev->node_props.mem_banks_count); 412 sysfs_show_32bit_prop(buffer, "caches_count", 413 dev->node_props.caches_count); 414 sysfs_show_32bit_prop(buffer, "io_links_count", 415 dev->node_props.io_links_count); 416 sysfs_show_32bit_prop(buffer, "cpu_core_id_base", 417 dev->node_props.cpu_core_id_base); 418 sysfs_show_32bit_prop(buffer, "simd_id_base", 419 dev->node_props.simd_id_base); 420 sysfs_show_32bit_prop(buffer, "max_waves_per_simd", 421 dev->node_props.max_waves_per_simd); 422 sysfs_show_32bit_prop(buffer, "lds_size_in_kb", 423 dev->node_props.lds_size_in_kb); 424 sysfs_show_32bit_prop(buffer, "gds_size_in_kb", 425 dev->node_props.gds_size_in_kb); 426 sysfs_show_32bit_prop(buffer, "wave_front_size", 427 dev->node_props.wave_front_size); 428 sysfs_show_32bit_prop(buffer, "array_count", 429 dev->node_props.array_count); 430 sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine", 431 dev->node_props.simd_arrays_per_engine); 432 sysfs_show_32bit_prop(buffer, "cu_per_simd_array", 433 dev->node_props.cu_per_simd_array); 434 sysfs_show_32bit_prop(buffer, "simd_per_cu", 435 dev->node_props.simd_per_cu); 436 sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu", 437 dev->node_props.max_slots_scratch_cu); 438 sysfs_show_32bit_prop(buffer, "vendor_id", 439 dev->node_props.vendor_id); 440 sysfs_show_32bit_prop(buffer, "device_id", 441 dev->node_props.device_id); 442 sysfs_show_32bit_prop(buffer, "location_id", 443 dev->node_props.location_id); 444 sysfs_show_32bit_prop(buffer, "drm_render_minor", 445 dev->node_props.drm_render_minor); 446 447 if (dev->gpu) { 448 log_max_watch_addr = 449 __ilog2_u32(dev->gpu->device_info->num_of_watch_points); 450 451 if (log_max_watch_addr) { 452 dev->node_props.capability |= 453 HSA_CAP_WATCH_POINTS_SUPPORTED; 454 455 dev->node_props.capability |= 456 ((log_max_watch_addr << 457 HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) & 458 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK); 459 } 460 461 if (dev->gpu->device_info->asic_family == CHIP_TONGA) 462 dev->node_props.capability |= 463 HSA_CAP_AQL_QUEUE_DOUBLE_MAP; 464 465 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute", 466 dev->node_props.max_engine_clk_fcompute); 467 468 sysfs_show_64bit_prop(buffer, "local_mem_size", 469 (unsigned long long int) 0); 470 471 sysfs_show_32bit_prop(buffer, "fw_version", 472 dev->gpu->kfd2kgd->get_fw_version( 473 dev->gpu->kgd, 474 KGD_ENGINE_MEC1)); 475 sysfs_show_32bit_prop(buffer, "capability", 476 dev->node_props.capability); 477 } 478 479 return sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute", 480 cpufreq_quick_get_max(0)/1000); 481 } 482 483 static const struct sysfs_ops node_ops = { 484 .show = node_show, 485 }; 486 487 static struct kobj_type node_type = { 488 .release = kfd_topology_kobj_release, 489 .sysfs_ops = &node_ops, 490 }; 491 492 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr) 493 { 494 sysfs_remove_file(kobj, attr); 495 kobject_del(kobj); 496 kobject_put(kobj); 497 } 498 499 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev) 500 { 501 struct kfd_iolink_properties *iolink; 502 struct kfd_cache_properties *cache; 503 struct kfd_mem_properties *mem; 504 struct kfd_perf_properties *perf; 505 506 if (dev->kobj_iolink) { 507 list_for_each_entry(iolink, &dev->io_link_props, list) 508 if (iolink->kobj) { 509 kfd_remove_sysfs_file(iolink->kobj, 510 &iolink->attr); 511 iolink->kobj = NULL; 512 } 513 kobject_del(dev->kobj_iolink); 514 kobject_put(dev->kobj_iolink); 515 dev->kobj_iolink = NULL; 516 } 517 518 if (dev->kobj_cache) { 519 list_for_each_entry(cache, &dev->cache_props, list) 520 if (cache->kobj) { 521 kfd_remove_sysfs_file(cache->kobj, 522 &cache->attr); 523 cache->kobj = NULL; 524 } 525 kobject_del(dev->kobj_cache); 526 kobject_put(dev->kobj_cache); 527 dev->kobj_cache = NULL; 528 } 529 530 if (dev->kobj_mem) { 531 list_for_each_entry(mem, &dev->mem_props, list) 532 if (mem->kobj) { 533 kfd_remove_sysfs_file(mem->kobj, &mem->attr); 534 mem->kobj = NULL; 535 } 536 kobject_del(dev->kobj_mem); 537 kobject_put(dev->kobj_mem); 538 dev->kobj_mem = NULL; 539 } 540 541 if (dev->kobj_perf) { 542 list_for_each_entry(perf, &dev->perf_props, list) { 543 kfree(perf->attr_group); 544 perf->attr_group = NULL; 545 } 546 kobject_del(dev->kobj_perf); 547 kobject_put(dev->kobj_perf); 548 dev->kobj_perf = NULL; 549 } 550 551 if (dev->kobj_node) { 552 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid); 553 sysfs_remove_file(dev->kobj_node, &dev->attr_name); 554 sysfs_remove_file(dev->kobj_node, &dev->attr_props); 555 kobject_del(dev->kobj_node); 556 kobject_put(dev->kobj_node); 557 dev->kobj_node = NULL; 558 } 559 } 560 561 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev, 562 uint32_t id) 563 { 564 struct kfd_iolink_properties *iolink; 565 struct kfd_cache_properties *cache; 566 struct kfd_mem_properties *mem; 567 struct kfd_perf_properties *perf; 568 int ret; 569 uint32_t i, num_attrs; 570 struct attribute **attrs; 571 572 if (WARN_ON(dev->kobj_node)) 573 return -EEXIST; 574 575 /* 576 * Creating the sysfs folders 577 */ 578 dev->kobj_node = kfd_alloc_struct(dev->kobj_node); 579 if (!dev->kobj_node) 580 return -ENOMEM; 581 582 ret = kobject_init_and_add(dev->kobj_node, &node_type, 583 sys_props.kobj_nodes, "%d", id); 584 if (ret < 0) 585 return ret; 586 587 dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node); 588 if (!dev->kobj_mem) 589 return -ENOMEM; 590 591 dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node); 592 if (!dev->kobj_cache) 593 return -ENOMEM; 594 595 dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node); 596 if (!dev->kobj_iolink) 597 return -ENOMEM; 598 599 dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node); 600 if (!dev->kobj_perf) 601 return -ENOMEM; 602 603 /* 604 * Creating sysfs files for node properties 605 */ 606 dev->attr_gpuid.name = "gpu_id"; 607 dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE; 608 sysfs_attr_init(&dev->attr_gpuid); 609 dev->attr_name.name = "name"; 610 dev->attr_name.mode = KFD_SYSFS_FILE_MODE; 611 sysfs_attr_init(&dev->attr_name); 612 dev->attr_props.name = "properties"; 613 dev->attr_props.mode = KFD_SYSFS_FILE_MODE; 614 sysfs_attr_init(&dev->attr_props); 615 ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid); 616 if (ret < 0) 617 return ret; 618 ret = sysfs_create_file(dev->kobj_node, &dev->attr_name); 619 if (ret < 0) 620 return ret; 621 ret = sysfs_create_file(dev->kobj_node, &dev->attr_props); 622 if (ret < 0) 623 return ret; 624 625 i = 0; 626 list_for_each_entry(mem, &dev->mem_props, list) { 627 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); 628 if (!mem->kobj) 629 return -ENOMEM; 630 ret = kobject_init_and_add(mem->kobj, &mem_type, 631 dev->kobj_mem, "%d", i); 632 if (ret < 0) 633 return ret; 634 635 mem->attr.name = "properties"; 636 mem->attr.mode = KFD_SYSFS_FILE_MODE; 637 sysfs_attr_init(&mem->attr); 638 ret = sysfs_create_file(mem->kobj, &mem->attr); 639 if (ret < 0) 640 return ret; 641 i++; 642 } 643 644 i = 0; 645 list_for_each_entry(cache, &dev->cache_props, list) { 646 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); 647 if (!cache->kobj) 648 return -ENOMEM; 649 ret = kobject_init_and_add(cache->kobj, &cache_type, 650 dev->kobj_cache, "%d", i); 651 if (ret < 0) 652 return ret; 653 654 cache->attr.name = "properties"; 655 cache->attr.mode = KFD_SYSFS_FILE_MODE; 656 sysfs_attr_init(&cache->attr); 657 ret = sysfs_create_file(cache->kobj, &cache->attr); 658 if (ret < 0) 659 return ret; 660 i++; 661 } 662 663 i = 0; 664 list_for_each_entry(iolink, &dev->io_link_props, list) { 665 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); 666 if (!iolink->kobj) 667 return -ENOMEM; 668 ret = kobject_init_and_add(iolink->kobj, &iolink_type, 669 dev->kobj_iolink, "%d", i); 670 if (ret < 0) 671 return ret; 672 673 iolink->attr.name = "properties"; 674 iolink->attr.mode = KFD_SYSFS_FILE_MODE; 675 sysfs_attr_init(&iolink->attr); 676 ret = sysfs_create_file(iolink->kobj, &iolink->attr); 677 if (ret < 0) 678 return ret; 679 i++; 680 } 681 682 /* All hardware blocks have the same number of attributes. */ 683 num_attrs = ARRAY_SIZE(perf_attr_iommu); 684 list_for_each_entry(perf, &dev->perf_props, list) { 685 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr) 686 * num_attrs + sizeof(struct attribute_group), 687 GFP_KERNEL); 688 if (!perf->attr_group) 689 return -ENOMEM; 690 691 attrs = (struct attribute **)(perf->attr_group + 1); 692 if (!strcmp(perf->block_name, "iommu")) { 693 /* Information of IOMMU's num_counters and counter_ids is shown 694 * under /sys/bus/event_source/devices/amd_iommu. We don't 695 * duplicate here. 696 */ 697 perf_attr_iommu[0].data = perf->max_concurrent; 698 for (i = 0; i < num_attrs; i++) 699 attrs[i] = &perf_attr_iommu[i].attr.attr; 700 } 701 perf->attr_group->name = perf->block_name; 702 perf->attr_group->attrs = attrs; 703 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group); 704 if (ret < 0) 705 return ret; 706 } 707 708 return 0; 709 } 710 711 /* Called with write topology lock acquired */ 712 static int kfd_build_sysfs_node_tree(void) 713 { 714 struct kfd_topology_device *dev; 715 int ret; 716 uint32_t i = 0; 717 718 list_for_each_entry(dev, &topology_device_list, list) { 719 ret = kfd_build_sysfs_node_entry(dev, i); 720 if (ret < 0) 721 return ret; 722 i++; 723 } 724 725 return 0; 726 } 727 728 /* Called with write topology lock acquired */ 729 static void kfd_remove_sysfs_node_tree(void) 730 { 731 struct kfd_topology_device *dev; 732 733 list_for_each_entry(dev, &topology_device_list, list) 734 kfd_remove_sysfs_node_entry(dev); 735 } 736 737 static int kfd_topology_update_sysfs(void) 738 { 739 int ret; 740 741 pr_info("Creating topology SYSFS entries\n"); 742 if (!sys_props.kobj_topology) { 743 sys_props.kobj_topology = 744 kfd_alloc_struct(sys_props.kobj_topology); 745 if (!sys_props.kobj_topology) 746 return -ENOMEM; 747 748 ret = kobject_init_and_add(sys_props.kobj_topology, 749 &sysprops_type, &kfd_device->kobj, 750 "topology"); 751 if (ret < 0) 752 return ret; 753 754 sys_props.kobj_nodes = kobject_create_and_add("nodes", 755 sys_props.kobj_topology); 756 if (!sys_props.kobj_nodes) 757 return -ENOMEM; 758 759 sys_props.attr_genid.name = "generation_id"; 760 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE; 761 sysfs_attr_init(&sys_props.attr_genid); 762 ret = sysfs_create_file(sys_props.kobj_topology, 763 &sys_props.attr_genid); 764 if (ret < 0) 765 return ret; 766 767 sys_props.attr_props.name = "system_properties"; 768 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE; 769 sysfs_attr_init(&sys_props.attr_props); 770 ret = sysfs_create_file(sys_props.kobj_topology, 771 &sys_props.attr_props); 772 if (ret < 0) 773 return ret; 774 } 775 776 kfd_remove_sysfs_node_tree(); 777 778 return kfd_build_sysfs_node_tree(); 779 } 780 781 static void kfd_topology_release_sysfs(void) 782 { 783 kfd_remove_sysfs_node_tree(); 784 if (sys_props.kobj_topology) { 785 sysfs_remove_file(sys_props.kobj_topology, 786 &sys_props.attr_genid); 787 sysfs_remove_file(sys_props.kobj_topology, 788 &sys_props.attr_props); 789 if (sys_props.kobj_nodes) { 790 kobject_del(sys_props.kobj_nodes); 791 kobject_put(sys_props.kobj_nodes); 792 sys_props.kobj_nodes = NULL; 793 } 794 kobject_del(sys_props.kobj_topology); 795 kobject_put(sys_props.kobj_topology); 796 sys_props.kobj_topology = NULL; 797 } 798 } 799 800 /* Called with write topology_lock acquired */ 801 static void kfd_topology_update_device_list(struct list_head *temp_list, 802 struct list_head *master_list) 803 { 804 while (!list_empty(temp_list)) { 805 list_move_tail(temp_list->next, master_list); 806 sys_props.num_devices++; 807 } 808 } 809 810 static void kfd_debug_print_topology(void) 811 { 812 struct kfd_topology_device *dev; 813 814 down_read(&topology_lock); 815 816 dev = list_last_entry(&topology_device_list, 817 struct kfd_topology_device, list); 818 if (dev) { 819 if (dev->node_props.cpu_cores_count && 820 dev->node_props.simd_count) { 821 pr_info("Topology: Add APU node [0x%0x:0x%0x]\n", 822 dev->node_props.device_id, 823 dev->node_props.vendor_id); 824 } else if (dev->node_props.cpu_cores_count) 825 pr_info("Topology: Add CPU node\n"); 826 else if (dev->node_props.simd_count) 827 pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n", 828 dev->node_props.device_id, 829 dev->node_props.vendor_id); 830 } 831 up_read(&topology_lock); 832 } 833 834 /* Helper function for intializing platform_xx members of 835 * kfd_system_properties. Uses OEM info from the last CPU/APU node. 836 */ 837 static void kfd_update_system_properties(void) 838 { 839 struct kfd_topology_device *dev; 840 841 down_read(&topology_lock); 842 dev = list_last_entry(&topology_device_list, 843 struct kfd_topology_device, list); 844 if (dev) { 845 sys_props.platform_id = 846 (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK; 847 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id); 848 sys_props.platform_rev = dev->oem_revision; 849 } 850 up_read(&topology_lock); 851 } 852 853 static void find_system_memory(const struct dmi_header *dm, 854 void *private) 855 { 856 struct kfd_mem_properties *mem; 857 u16 mem_width, mem_clock; 858 struct kfd_topology_device *kdev = 859 (struct kfd_topology_device *)private; 860 const u8 *dmi_data = (const u8 *)(dm + 1); 861 862 if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) { 863 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6)); 864 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11)); 865 list_for_each_entry(mem, &kdev->mem_props, list) { 866 if (mem_width != 0xFFFF && mem_width != 0) 867 mem->width = mem_width; 868 if (mem_clock != 0) 869 mem->mem_clk_max = mem_clock; 870 } 871 } 872 } 873 874 /* 875 * Performance counters information is not part of CRAT but we would like to 876 * put them in the sysfs under topology directory for Thunk to get the data. 877 * This function is called before updating the sysfs. 878 */ 879 static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev) 880 { 881 /* These are the only counters supported so far */ 882 return kfd_iommu_add_perf_counters(kdev); 883 } 884 885 /* kfd_add_non_crat_information - Add information that is not currently 886 * defined in CRAT but is necessary for KFD topology 887 * @dev - topology device to which addition info is added 888 */ 889 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev) 890 { 891 /* Check if CPU only node. */ 892 if (!kdev->gpu) { 893 /* Add system memory information */ 894 dmi_walk(find_system_memory, kdev); 895 } 896 /* TODO: For GPU node, rearrange code from kfd_topology_add_device */ 897 } 898 899 /* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices. 900 * Ignore CRAT for all other devices. AMD APU is identified if both CPU 901 * and GPU cores are present. 902 * @device_list - topology device list created by parsing ACPI CRAT table. 903 * @return - TRUE if invalid, FALSE is valid. 904 */ 905 static bool kfd_is_acpi_crat_invalid(struct list_head *device_list) 906 { 907 struct kfd_topology_device *dev; 908 909 list_for_each_entry(dev, device_list, list) { 910 if (dev->node_props.cpu_cores_count && 911 dev->node_props.simd_count) 912 return false; 913 } 914 pr_info("Ignoring ACPI CRAT on non-APU system\n"); 915 return true; 916 } 917 918 int kfd_topology_init(void) 919 { 920 void *crat_image = NULL; 921 size_t image_size = 0; 922 int ret; 923 struct list_head temp_topology_device_list; 924 int cpu_only_node = 0; 925 struct kfd_topology_device *kdev; 926 int proximity_domain; 927 928 /* topology_device_list - Master list of all topology devices 929 * temp_topology_device_list - temporary list created while parsing CRAT 930 * or VCRAT. Once parsing is complete the contents of list is moved to 931 * topology_device_list 932 */ 933 934 /* Initialize the head for the both the lists */ 935 INIT_LIST_HEAD(&topology_device_list); 936 INIT_LIST_HEAD(&temp_topology_device_list); 937 init_rwsem(&topology_lock); 938 939 memset(&sys_props, 0, sizeof(sys_props)); 940 941 /* Proximity domains in ACPI CRAT tables start counting at 942 * 0. The same should be true for virtual CRAT tables created 943 * at this stage. GPUs added later in kfd_topology_add_device 944 * use a counter. 945 */ 946 proximity_domain = 0; 947 948 /* 949 * Get the CRAT image from the ACPI. If ACPI doesn't have one 950 * or if ACPI CRAT is invalid create a virtual CRAT. 951 * NOTE: The current implementation expects all AMD APUs to have 952 * CRAT. If no CRAT is available, it is assumed to be a CPU 953 */ 954 ret = kfd_create_crat_image_acpi(&crat_image, &image_size); 955 if (!ret) { 956 ret = kfd_parse_crat_table(crat_image, 957 &temp_topology_device_list, 958 proximity_domain); 959 if (ret || 960 kfd_is_acpi_crat_invalid(&temp_topology_device_list)) { 961 kfd_release_topology_device_list( 962 &temp_topology_device_list); 963 kfd_destroy_crat_image(crat_image); 964 crat_image = NULL; 965 } 966 } 967 968 if (!crat_image) { 969 ret = kfd_create_crat_image_virtual(&crat_image, &image_size, 970 COMPUTE_UNIT_CPU, NULL, 971 proximity_domain); 972 cpu_only_node = 1; 973 if (ret) { 974 pr_err("Error creating VCRAT table for CPU\n"); 975 return ret; 976 } 977 978 ret = kfd_parse_crat_table(crat_image, 979 &temp_topology_device_list, 980 proximity_domain); 981 if (ret) { 982 pr_err("Error parsing VCRAT table for CPU\n"); 983 goto err; 984 } 985 } 986 987 kdev = list_first_entry(&temp_topology_device_list, 988 struct kfd_topology_device, list); 989 kfd_add_perf_to_topology(kdev); 990 991 down_write(&topology_lock); 992 kfd_topology_update_device_list(&temp_topology_device_list, 993 &topology_device_list); 994 atomic_set(&topology_crat_proximity_domain, sys_props.num_devices-1); 995 ret = kfd_topology_update_sysfs(); 996 up_write(&topology_lock); 997 998 if (!ret) { 999 sys_props.generation_count++; 1000 kfd_update_system_properties(); 1001 kfd_debug_print_topology(); 1002 pr_info("Finished initializing topology\n"); 1003 } else 1004 pr_err("Failed to update topology in sysfs ret=%d\n", ret); 1005 1006 /* For nodes with GPU, this information gets added 1007 * when GPU is detected (kfd_topology_add_device). 1008 */ 1009 if (cpu_only_node) { 1010 /* Add additional information to CPU only node created above */ 1011 down_write(&topology_lock); 1012 kdev = list_first_entry(&topology_device_list, 1013 struct kfd_topology_device, list); 1014 up_write(&topology_lock); 1015 kfd_add_non_crat_information(kdev); 1016 } 1017 1018 err: 1019 kfd_destroy_crat_image(crat_image); 1020 return ret; 1021 } 1022 1023 void kfd_topology_shutdown(void) 1024 { 1025 down_write(&topology_lock); 1026 kfd_topology_release_sysfs(); 1027 kfd_release_live_view(); 1028 up_write(&topology_lock); 1029 } 1030 1031 static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu) 1032 { 1033 uint32_t hashout; 1034 uint32_t buf[7]; 1035 uint64_t local_mem_size; 1036 int i; 1037 struct kfd_local_mem_info local_mem_info; 1038 1039 if (!gpu) 1040 return 0; 1041 1042 gpu->kfd2kgd->get_local_mem_info(gpu->kgd, &local_mem_info); 1043 1044 local_mem_size = local_mem_info.local_mem_size_private + 1045 local_mem_info.local_mem_size_public; 1046 1047 buf[0] = gpu->pdev->devfn; 1048 buf[1] = gpu->pdev->subsystem_vendor; 1049 buf[2] = gpu->pdev->subsystem_device; 1050 buf[3] = gpu->pdev->device; 1051 buf[4] = gpu->pdev->bus->number; 1052 buf[5] = lower_32_bits(local_mem_size); 1053 buf[6] = upper_32_bits(local_mem_size); 1054 1055 for (i = 0, hashout = 0; i < 7; i++) 1056 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH); 1057 1058 return hashout; 1059 } 1060 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If 1061 * the GPU device is not already present in the topology device 1062 * list then return NULL. This means a new topology device has to 1063 * be created for this GPU. 1064 * TODO: Rather than assiging @gpu to first topology device withtout 1065 * gpu attached, it will better to have more stringent check. 1066 */ 1067 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu) 1068 { 1069 struct kfd_topology_device *dev; 1070 struct kfd_topology_device *out_dev = NULL; 1071 1072 down_write(&topology_lock); 1073 list_for_each_entry(dev, &topology_device_list, list) 1074 if (!dev->gpu && (dev->node_props.simd_count > 0)) { 1075 dev->gpu = gpu; 1076 out_dev = dev; 1077 break; 1078 } 1079 up_write(&topology_lock); 1080 return out_dev; 1081 } 1082 1083 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival) 1084 { 1085 /* 1086 * TODO: Generate an event for thunk about the arrival/removal 1087 * of the GPU 1088 */ 1089 } 1090 1091 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info, 1092 * patch this after CRAT parsing. 1093 */ 1094 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev) 1095 { 1096 struct kfd_mem_properties *mem; 1097 struct kfd_local_mem_info local_mem_info; 1098 1099 if (!dev) 1100 return; 1101 1102 /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with 1103 * single bank of VRAM local memory. 1104 * for dGPUs - VCRAT reports only one bank of Local Memory 1105 * for APUs - If CRAT from ACPI reports more than one bank, then 1106 * all the banks will report the same mem_clk_max information 1107 */ 1108 dev->gpu->kfd2kgd->get_local_mem_info(dev->gpu->kgd, 1109 &local_mem_info); 1110 1111 list_for_each_entry(mem, &dev->mem_props, list) 1112 mem->mem_clk_max = local_mem_info.mem_clk_max; 1113 } 1114 1115 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev) 1116 { 1117 struct kfd_iolink_properties *link; 1118 1119 if (!dev || !dev->gpu) 1120 return; 1121 1122 /* GPU only creates direck links so apply flags setting to all */ 1123 if (dev->gpu->device_info->asic_family == CHIP_HAWAII) 1124 list_for_each_entry(link, &dev->io_link_props, list) 1125 link->flags = CRAT_IOLINK_FLAGS_ENABLED | 1126 CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT | 1127 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT; 1128 } 1129 1130 int kfd_topology_add_device(struct kfd_dev *gpu) 1131 { 1132 uint32_t gpu_id; 1133 struct kfd_topology_device *dev; 1134 struct kfd_cu_info cu_info; 1135 int res = 0; 1136 struct list_head temp_topology_device_list; 1137 void *crat_image = NULL; 1138 size_t image_size = 0; 1139 int proximity_domain; 1140 1141 INIT_LIST_HEAD(&temp_topology_device_list); 1142 1143 gpu_id = kfd_generate_gpu_id(gpu); 1144 1145 pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id); 1146 1147 proximity_domain = atomic_inc_return(&topology_crat_proximity_domain); 1148 1149 /* Check to see if this gpu device exists in the topology_device_list. 1150 * If so, assign the gpu to that device, 1151 * else create a Virtual CRAT for this gpu device and then parse that 1152 * CRAT to create a new topology device. Once created assign the gpu to 1153 * that topology device 1154 */ 1155 dev = kfd_assign_gpu(gpu); 1156 if (!dev) { 1157 res = kfd_create_crat_image_virtual(&crat_image, &image_size, 1158 COMPUTE_UNIT_GPU, gpu, 1159 proximity_domain); 1160 if (res) { 1161 pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n", 1162 gpu_id); 1163 return res; 1164 } 1165 res = kfd_parse_crat_table(crat_image, 1166 &temp_topology_device_list, 1167 proximity_domain); 1168 if (res) { 1169 pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n", 1170 gpu_id); 1171 goto err; 1172 } 1173 1174 down_write(&topology_lock); 1175 kfd_topology_update_device_list(&temp_topology_device_list, 1176 &topology_device_list); 1177 1178 /* Update the SYSFS tree, since we added another topology 1179 * device 1180 */ 1181 res = kfd_topology_update_sysfs(); 1182 up_write(&topology_lock); 1183 1184 if (!res) 1185 sys_props.generation_count++; 1186 else 1187 pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n", 1188 gpu_id, res); 1189 dev = kfd_assign_gpu(gpu); 1190 if (WARN_ON(!dev)) { 1191 res = -ENODEV; 1192 goto err; 1193 } 1194 } 1195 1196 dev->gpu_id = gpu_id; 1197 gpu->id = gpu_id; 1198 1199 /* TODO: Move the following lines to function 1200 * kfd_add_non_crat_information 1201 */ 1202 1203 /* Fill-in additional information that is not available in CRAT but 1204 * needed for the topology 1205 */ 1206 1207 dev->gpu->kfd2kgd->get_cu_info(dev->gpu->kgd, &cu_info); 1208 dev->node_props.simd_arrays_per_engine = 1209 cu_info.num_shader_arrays_per_engine; 1210 1211 dev->node_props.vendor_id = gpu->pdev->vendor; 1212 dev->node_props.device_id = gpu->pdev->device; 1213 dev->node_props.location_id = PCI_DEVID(gpu->pdev->bus->number, 1214 gpu->pdev->devfn); 1215 dev->node_props.max_engine_clk_fcompute = 1216 dev->gpu->kfd2kgd->get_max_engine_clock_in_mhz(dev->gpu->kgd); 1217 dev->node_props.max_engine_clk_ccompute = 1218 cpufreq_quick_get_max(0) / 1000; 1219 dev->node_props.drm_render_minor = 1220 gpu->shared_resources.drm_render_minor; 1221 1222 kfd_fill_mem_clk_max_info(dev); 1223 kfd_fill_iolink_non_crat_info(dev); 1224 1225 switch (dev->gpu->device_info->asic_family) { 1226 case CHIP_KAVERI: 1227 case CHIP_HAWAII: 1228 case CHIP_TONGA: 1229 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 << 1230 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) & 1231 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK); 1232 break; 1233 case CHIP_CARRIZO: 1234 case CHIP_FIJI: 1235 case CHIP_POLARIS10: 1236 case CHIP_POLARIS11: 1237 pr_debug("Adding doorbell packet type capability\n"); 1238 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 << 1239 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) & 1240 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK); 1241 break; 1242 case CHIP_VEGA10: 1243 case CHIP_RAVEN: 1244 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 << 1245 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) & 1246 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK); 1247 break; 1248 default: 1249 WARN(1, "Unexpected ASIC family %u", 1250 dev->gpu->device_info->asic_family); 1251 } 1252 1253 /* Fix errors in CZ CRAT. 1254 * simd_count: Carrizo CRAT reports wrong simd_count, probably 1255 * because it doesn't consider masked out CUs 1256 * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd 1257 * capability flag: Carrizo CRAT doesn't report IOMMU flags 1258 */ 1259 if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) { 1260 dev->node_props.simd_count = 1261 cu_info.simd_per_cu * cu_info.cu_active_number; 1262 dev->node_props.max_waves_per_simd = 10; 1263 dev->node_props.capability |= HSA_CAP_ATS_PRESENT; 1264 } 1265 1266 kfd_debug_print_topology(); 1267 1268 if (!res) 1269 kfd_notify_gpu_change(gpu_id, 1); 1270 err: 1271 kfd_destroy_crat_image(crat_image); 1272 return res; 1273 } 1274 1275 int kfd_topology_remove_device(struct kfd_dev *gpu) 1276 { 1277 struct kfd_topology_device *dev, *tmp; 1278 uint32_t gpu_id; 1279 int res = -ENODEV; 1280 1281 down_write(&topology_lock); 1282 1283 list_for_each_entry_safe(dev, tmp, &topology_device_list, list) 1284 if (dev->gpu == gpu) { 1285 gpu_id = dev->gpu_id; 1286 kfd_remove_sysfs_node_entry(dev); 1287 kfd_release_topology_device(dev); 1288 sys_props.num_devices--; 1289 res = 0; 1290 if (kfd_topology_update_sysfs() < 0) 1291 kfd_topology_release_sysfs(); 1292 break; 1293 } 1294 1295 up_write(&topology_lock); 1296 1297 if (!res) 1298 kfd_notify_gpu_change(gpu_id, 0); 1299 1300 return res; 1301 } 1302 1303 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD 1304 * topology. If GPU device is found @idx, then valid kfd_dev pointer is 1305 * returned through @kdev 1306 * Return - 0: On success (@kdev will be NULL for non GPU nodes) 1307 * -1: If end of list 1308 */ 1309 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev) 1310 { 1311 1312 struct kfd_topology_device *top_dev; 1313 uint8_t device_idx = 0; 1314 1315 *kdev = NULL; 1316 down_read(&topology_lock); 1317 1318 list_for_each_entry(top_dev, &topology_device_list, list) { 1319 if (device_idx == idx) { 1320 *kdev = top_dev->gpu; 1321 up_read(&topology_lock); 1322 return 0; 1323 } 1324 1325 device_idx++; 1326 } 1327 1328 up_read(&topology_lock); 1329 1330 return -1; 1331 1332 } 1333 1334 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask) 1335 { 1336 const struct cpuinfo_x86 *cpuinfo; 1337 int first_cpu_of_numa_node; 1338 1339 if (!cpumask || cpumask == cpu_none_mask) 1340 return -1; 1341 first_cpu_of_numa_node = cpumask_first(cpumask); 1342 if (first_cpu_of_numa_node >= nr_cpu_ids) 1343 return -1; 1344 cpuinfo = &cpu_data(first_cpu_of_numa_node); 1345 1346 return cpuinfo->apicid; 1347 } 1348 1349 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor 1350 * of the given NUMA node (numa_node_id) 1351 * Return -1 on failure 1352 */ 1353 int kfd_numa_node_to_apic_id(int numa_node_id) 1354 { 1355 if (numa_node_id == -1) { 1356 pr_warn("Invalid NUMA Node. Use online CPU mask\n"); 1357 return kfd_cpumask_to_apic_id(cpu_online_mask); 1358 } 1359 return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id)); 1360 } 1361 1362 #if defined(CONFIG_DEBUG_FS) 1363 1364 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data) 1365 { 1366 struct kfd_topology_device *dev; 1367 unsigned int i = 0; 1368 int r = 0; 1369 1370 down_read(&topology_lock); 1371 1372 list_for_each_entry(dev, &topology_device_list, list) { 1373 if (!dev->gpu) { 1374 i++; 1375 continue; 1376 } 1377 1378 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id); 1379 r = dqm_debugfs_hqds(m, dev->gpu->dqm); 1380 if (r) 1381 break; 1382 } 1383 1384 up_read(&topology_lock); 1385 1386 return r; 1387 } 1388 1389 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data) 1390 { 1391 struct kfd_topology_device *dev; 1392 unsigned int i = 0; 1393 int r = 0; 1394 1395 down_read(&topology_lock); 1396 1397 list_for_each_entry(dev, &topology_device_list, list) { 1398 if (!dev->gpu) { 1399 i++; 1400 continue; 1401 } 1402 1403 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id); 1404 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packets); 1405 if (r) 1406 break; 1407 } 1408 1409 up_read(&topology_lock); 1410 1411 return r; 1412 } 1413 1414 #endif 1415