drivers/gpu/drm/amd/amdkfd/kfd_topology.c

   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 #include "amdgpu_amdkfd.h"
  40
  41 /* topology_device_list - Master list of all topology devices */
  42 static struct list_head topology_device_list;
  43 static struct kfd_system_properties sys_props;
  44
  45 static DECLARE_RWSEM(topology_lock);
  46 static atomic_t topology_crat_proximity_domain;
  47
  48 struct kfd_topology_device *kfd_topology_device_by_proximity_domain(
  49                                                 uint32_t proximity_domain)
  50 {
  51         struct kfd_topology_device *top_dev;
  52         struct kfd_topology_device *device = NULL;
  53
  54         down_read(&topology_lock);
  55
  56         list_for_each_entry(top_dev, &topology_device_list, list)
  57                 if (top_dev->proximity_domain == proximity_domain) {
  58                         device = top_dev;
  59                         break;
  60                 }
  61
  62         up_read(&topology_lock);
  63
  64         return device;
  65 }
  66
  67 struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
  68 {
  69         struct kfd_topology_device *top_dev = NULL;
  70         struct kfd_topology_device *ret = NULL;
  71
  72         down_read(&topology_lock);
  73
  74         list_for_each_entry(top_dev, &topology_device_list, list)
  75                 if (top_dev->gpu_id == gpu_id) {
  76                         ret = top_dev;
  77                         break;
  78                 }
  79
  80         up_read(&topology_lock);
  81
  82         return ret;
  83 }
  84
  85 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
  86 {
  87         struct kfd_topology_device *top_dev;
  88
  89         top_dev = kfd_topology_device_by_id(gpu_id);
  90         if (!top_dev)
  91                 return NULL;
  92
  93         return top_dev->gpu;
  94 }
  95
  96 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
  97 {
  98         struct kfd_topology_device *top_dev;
  99         struct kfd_dev *device = NULL;
 100
 101         down_read(&topology_lock);
 102
 103         list_for_each_entry(top_dev, &topology_device_list, list)
 104                 if (top_dev->gpu && top_dev->gpu->pdev == pdev) {
 105                         device = top_dev->gpu;
 106                         break;
 107                 }
 108
 109         up_read(&topology_lock);
 110
 111         return device;
 112 }
 113
 114 struct kfd_dev *kfd_device_by_kgd(const struct kgd_dev *kgd)
 115 {
 116         struct kfd_topology_device *top_dev;
 117         struct kfd_dev *device = NULL;
 118
 119         down_read(&topology_lock);
 120
 121         list_for_each_entry(top_dev, &topology_device_list, list)
 122                 if (top_dev->gpu && top_dev->gpu->kgd == kgd) {
 123                         device = top_dev->gpu;
 124                         break;
 125                 }
 126
 127         up_read(&topology_lock);
 128
 129         return device;
 130 }
 131
 132 /* Called with write topology_lock acquired */
 133 static void kfd_release_topology_device(struct kfd_topology_device *dev)
 134 {
 135         struct kfd_mem_properties *mem;
 136         struct kfd_cache_properties *cache;
 137         struct kfd_iolink_properties *iolink;
 138         struct kfd_perf_properties *perf;
 139
 140         list_del(&dev->list);
 141
 142         while (dev->mem_props.next != &dev->mem_props) {
 143                 mem = container_of(dev->mem_props.next,
 144                                 struct kfd_mem_properties, list);
 145                 list_del(&mem->list);
 146                 kfree(mem);
 147         }
 148
 149         while (dev->cache_props.next != &dev->cache_props) {
 150                 cache = container_of(dev->cache_props.next,
 151                                 struct kfd_cache_properties, list);
 152                 list_del(&cache->list);
 153                 kfree(cache);
 154         }
 155
 156         while (dev->io_link_props.next != &dev->io_link_props) {
 157                 iolink = container_of(dev->io_link_props.next,
 158                                 struct kfd_iolink_properties, list);
 159                 list_del(&iolink->list);
 160                 kfree(iolink);
 161         }
 162
 163         while (dev->perf_props.next != &dev->perf_props) {
 164                 perf = container_of(dev->perf_props.next,
 165                                 struct kfd_perf_properties, list);
 166                 list_del(&perf->list);
 167                 kfree(perf);
 168         }
 169
 170         kfree(dev);
 171 }
 172
 173 void kfd_release_topology_device_list(struct list_head *device_list)
 174 {
 175         struct kfd_topology_device *dev;
 176
 177         while (!list_empty(device_list)) {
 178                 dev = list_first_entry(device_list,
 179                                        struct kfd_topology_device, list);
 180                 kfd_release_topology_device(dev);
 181         }
 182 }
 183
 184 static void kfd_release_live_view(void)
 185 {
 186         kfd_release_topology_device_list(&topology_device_list);
 187         memset(&sys_props, 0, sizeof(sys_props));
 188 }
 189
 190 struct kfd_topology_device *kfd_create_topology_device(
 191                                 struct list_head *device_list)
 192 {
 193         struct kfd_topology_device *dev;
 194
 195         dev = kfd_alloc_struct(dev);
 196         if (!dev) {
 197                 pr_err("No memory to allocate a topology device");
 198                 return NULL;
 199         }
 200
 201         INIT_LIST_HEAD(&dev->mem_props);
 202         INIT_LIST_HEAD(&dev->cache_props);
 203         INIT_LIST_HEAD(&dev->io_link_props);
 204         INIT_LIST_HEAD(&dev->perf_props);
 205
 206         list_add_tail(&dev->list, device_list);
 207
 208         return dev;
 209 }
 210
 211
 212 #define sysfs_show_gen_prop(buffer, fmt, ...) \
 213                 snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__)
 214 #define sysfs_show_32bit_prop(buffer, name, value) \
 215                 sysfs_show_gen_prop(buffer, "%s %u\n", name, value)
 216 #define sysfs_show_64bit_prop(buffer, name, value) \
 217                 sysfs_show_gen_prop(buffer, "%s %llu\n", name, value)
 218 #define sysfs_show_32bit_val(buffer, value) \
 219                 sysfs_show_gen_prop(buffer, "%u\n", value)
 220 #define sysfs_show_str_val(buffer, value) \
 221                 sysfs_show_gen_prop(buffer, "%s\n", value)
 222
 223 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
 224                 char *buffer)
 225 {
 226         ssize_t ret;
 227
 228         /* Making sure that the buffer is an empty string */
 229         buffer[0] = 0;
 230
 231         if (attr == &sys_props.attr_genid) {
 232                 ret = sysfs_show_32bit_val(buffer, sys_props.generation_count);
 233         } else if (attr == &sys_props.attr_props) {
 234                 sysfs_show_64bit_prop(buffer, "platform_oem",
 235                                 sys_props.platform_oem);
 236                 sysfs_show_64bit_prop(buffer, "platform_id",
 237                                 sys_props.platform_id);
 238                 ret = sysfs_show_64bit_prop(buffer, "platform_rev",
 239                                 sys_props.platform_rev);
 240         } else {
 241                 ret = -EINVAL;
 242         }
 243
 244         return ret;
 245 }
 246
 247 static void kfd_topology_kobj_release(struct kobject *kobj)
 248 {
 249         kfree(kobj);
 250 }
 251
 252 static const struct sysfs_ops sysprops_ops = {
 253         .show = sysprops_show,
 254 };
 255
 256 static struct kobj_type sysprops_type = {
 257         .release = kfd_topology_kobj_release,
 258         .sysfs_ops = &sysprops_ops,
 259 };
 260
 261 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
 262                 char *buffer)
 263 {
 264         ssize_t ret;
 265         struct kfd_iolink_properties *iolink;
 266
 267         /* Making sure that the buffer is an empty string */
 268         buffer[0] = 0;
 269
 270         iolink = container_of(attr, struct kfd_iolink_properties, attr);
 271         sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type);
 272         sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj);
 273         sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min);
 274         sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from);
 275         sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to);
 276         sysfs_show_32bit_prop(buffer, "weight", iolink->weight);
 277         sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency);
 278         sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency);
 279         sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth);
 280         sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth);
 281         sysfs_show_32bit_prop(buffer, "recommended_transfer_size",
 282                         iolink->rec_transfer_size);
 283         ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags);
 284
 285         return ret;
 286 }
 287
 288 static const struct sysfs_ops iolink_ops = {
 289         .show = iolink_show,
 290 };
 291
 292 static struct kobj_type iolink_type = {
 293         .release = kfd_topology_kobj_release,
 294         .sysfs_ops = &iolink_ops,
 295 };
 296
 297 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
 298                 char *buffer)
 299 {
 300         ssize_t ret;
 301         struct kfd_mem_properties *mem;
 302
 303         /* Making sure that the buffer is an empty string */
 304         buffer[0] = 0;
 305
 306         mem = container_of(attr, struct kfd_mem_properties, attr);
 307         sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type);
 308         sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes);
 309         sysfs_show_32bit_prop(buffer, "flags", mem->flags);
 310         sysfs_show_32bit_prop(buffer, "width", mem->width);
 311         ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max);
 312
 313         return ret;
 314 }
 315
 316 static const struct sysfs_ops mem_ops = {
 317         .show = mem_show,
 318 };
 319
 320 static struct kobj_type mem_type = {
 321         .release = kfd_topology_kobj_release,
 322         .sysfs_ops = &mem_ops,
 323 };
 324
 325 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
 326                 char *buffer)
 327 {
 328         ssize_t ret;
 329         uint32_t i, j;
 330         struct kfd_cache_properties *cache;
 331
 332         /* Making sure that the buffer is an empty string */
 333         buffer[0] = 0;
 334
 335         cache = container_of(attr, struct kfd_cache_properties, attr);
 336         sysfs_show_32bit_prop(buffer, "processor_id_low",
 337                         cache->processor_id_low);
 338         sysfs_show_32bit_prop(buffer, "level", cache->cache_level);
 339         sysfs_show_32bit_prop(buffer, "size", cache->cache_size);
 340         sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size);
 341         sysfs_show_32bit_prop(buffer, "cache_lines_per_tag",
 342                         cache->cachelines_per_tag);
 343         sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc);
 344         sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency);
 345         sysfs_show_32bit_prop(buffer, "type", cache->cache_type);
 346         snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer);
 347         for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++)
 348                 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++) {
 349                         /* Check each bit */
 350                         if (cache->sibling_map[i] & (1 << j))
 351                                 ret = snprintf(buffer, PAGE_SIZE,
 352                                          "%s%d%s", buffer, 1, ",");
 353                         else
 354                                 ret = snprintf(buffer, PAGE_SIZE,
 355                                          "%s%d%s", buffer, 0, ",");
 356                 }
 357         /* Replace the last "," with end of line */
 358         *(buffer + strlen(buffer) - 1) = 0xA;
 359         return ret;
 360 }
 361
 362 static const struct sysfs_ops cache_ops = {
 363         .show = kfd_cache_show,
 364 };
 365
 366 static struct kobj_type cache_type = {
 367         .release = kfd_topology_kobj_release,
 368         .sysfs_ops = &cache_ops,
 369 };
 370
 371 /****** Sysfs of Performance Counters ******/
 372
 373 struct kfd_perf_attr {
 374         struct kobj_attribute attr;
 375         uint32_t data;
 376 };
 377
 378 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
 379                         char *buf)
 380 {
 381         struct kfd_perf_attr *attr;
 382
 383         buf[0] = 0;
 384         attr = container_of(attrs, struct kfd_perf_attr, attr);
 385         if (!attr->data) /* invalid data for PMC */
 386                 return 0;
 387         else
 388                 return sysfs_show_32bit_val(buf, attr->data);
 389 }
 390
 391 #define KFD_PERF_DESC(_name, _data)                     \
 392 {                                                       \
 393         .attr  = __ATTR(_name, 0444, perf_show, NULL),  \
 394         .data = _data,                                  \
 395 }
 396
 397 static struct kfd_perf_attr perf_attr_iommu[] = {
 398         KFD_PERF_DESC(max_concurrent, 0),
 399         KFD_PERF_DESC(num_counters, 0),
 400         KFD_PERF_DESC(counter_ids, 0),
 401 };
 402 /****************************************/
 403
 404 static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
 405                 char *buffer)
 406 {
 407         struct kfd_topology_device *dev;
 408         char public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE];
 409         uint32_t i;
 410         uint32_t log_max_watch_addr;
 411
 412         /* Making sure that the buffer is an empty string */
 413         buffer[0] = 0;
 414
 415         if (strcmp(attr->name, "gpu_id") == 0) {
 416                 dev = container_of(attr, struct kfd_topology_device,
 417                                 attr_gpuid);
 418                 return sysfs_show_32bit_val(buffer, dev->gpu_id);
 419         }
 420
 421         if (strcmp(attr->name, "name") == 0) {
 422                 dev = container_of(attr, struct kfd_topology_device,
 423                                 attr_name);
 424                 for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE; i++) {
 425                         public_name[i] =
 426                                         (char)dev->node_props.marketing_name[i];
 427                         if (dev->node_props.marketing_name[i] == 0)
 428                                 break;
 429                 }
 430                 public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1] = 0x0;
 431                 return sysfs_show_str_val(buffer, public_name);
 432         }
 433
 434         dev = container_of(attr, struct kfd_topology_device,
 435                         attr_props);
 436         sysfs_show_32bit_prop(buffer, "cpu_cores_count",
 437                         dev->node_props.cpu_cores_count);
 438         sysfs_show_32bit_prop(buffer, "simd_count",
 439                         dev->node_props.simd_count);
 440         sysfs_show_32bit_prop(buffer, "mem_banks_count",
 441                         dev->node_props.mem_banks_count);
 442         sysfs_show_32bit_prop(buffer, "caches_count",
 443                         dev->node_props.caches_count);
 444         sysfs_show_32bit_prop(buffer, "io_links_count",
 445                         dev->node_props.io_links_count);
 446         sysfs_show_32bit_prop(buffer, "cpu_core_id_base",
 447                         dev->node_props.cpu_core_id_base);
 448         sysfs_show_32bit_prop(buffer, "simd_id_base",
 449                         dev->node_props.simd_id_base);
 450         sysfs_show_32bit_prop(buffer, "max_waves_per_simd",
 451                         dev->node_props.max_waves_per_simd);
 452         sysfs_show_32bit_prop(buffer, "lds_size_in_kb",
 453                         dev->node_props.lds_size_in_kb);
 454         sysfs_show_32bit_prop(buffer, "gds_size_in_kb",
 455                         dev->node_props.gds_size_in_kb);
 456         sysfs_show_32bit_prop(buffer, "wave_front_size",
 457                         dev->node_props.wave_front_size);
 458         sysfs_show_32bit_prop(buffer, "array_count",
 459                         dev->node_props.array_count);
 460         sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine",
 461                         dev->node_props.simd_arrays_per_engine);
 462         sysfs_show_32bit_prop(buffer, "cu_per_simd_array",
 463                         dev->node_props.cu_per_simd_array);
 464         sysfs_show_32bit_prop(buffer, "simd_per_cu",
 465                         dev->node_props.simd_per_cu);
 466         sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu",
 467                         dev->node_props.max_slots_scratch_cu);
 468         sysfs_show_32bit_prop(buffer, "vendor_id",
 469                         dev->node_props.vendor_id);
 470         sysfs_show_32bit_prop(buffer, "device_id",
 471                         dev->node_props.device_id);
 472         sysfs_show_32bit_prop(buffer, "location_id",
 473                         dev->node_props.location_id);
 474         sysfs_show_32bit_prop(buffer, "drm_render_minor",
 475                         dev->node_props.drm_render_minor);
 476         sysfs_show_64bit_prop(buffer, "hive_id",
 477                         dev->node_props.hive_id);
 478
 479         if (dev->gpu) {
 480                 log_max_watch_addr =
 481                         __ilog2_u32(dev->gpu->device_info->num_of_watch_points);
 482
 483                 if (log_max_watch_addr) {
 484                         dev->node_props.capability |=
 485                                         HSA_CAP_WATCH_POINTS_SUPPORTED;
 486
 487                         dev->node_props.capability |=
 488                                 ((log_max_watch_addr <<
 489                                         HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
 490                                 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
 491                 }
 492
 493                 if (dev->gpu->device_info->asic_family == CHIP_TONGA)
 494                         dev->node_props.capability |=
 495                                         HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
 496
 497                 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute",
 498                         dev->node_props.max_engine_clk_fcompute);
 499
 500                 sysfs_show_64bit_prop(buffer, "local_mem_size",
 501                                 (unsigned long long int) 0);
 502
 503                 sysfs_show_32bit_prop(buffer, "fw_version",
 504                                 dev->gpu->mec_fw_version);
 505                 sysfs_show_32bit_prop(buffer, "capability",
 506                                 dev->node_props.capability);
 507                 sysfs_show_32bit_prop(buffer, "sdma_fw_version",
 508                                 dev->gpu->sdma_fw_version);
 509         }
 510
 511         return sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute",
 512                                         cpufreq_quick_get_max(0)/1000);
 513 }
 514
 515 static const struct sysfs_ops node_ops = {
 516         .show = node_show,
 517 };
 518
 519 static struct kobj_type node_type = {
 520         .release = kfd_topology_kobj_release,
 521         .sysfs_ops = &node_ops,
 522 };
 523
 524 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
 525 {
 526         sysfs_remove_file(kobj, attr);
 527         kobject_del(kobj);
 528         kobject_put(kobj);
 529 }
 530
 531 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
 532 {
 533         struct kfd_iolink_properties *iolink;
 534         struct kfd_cache_properties *cache;
 535         struct kfd_mem_properties *mem;
 536         struct kfd_perf_properties *perf;
 537
 538         if (dev->kobj_iolink) {
 539                 list_for_each_entry(iolink, &dev->io_link_props, list)
 540                         if (iolink->kobj) {
 541                                 kfd_remove_sysfs_file(iolink->kobj,
 542                                                         &iolink->attr);
 543                                 iolink->kobj = NULL;
 544                         }
 545                 kobject_del(dev->kobj_iolink);
 546                 kobject_put(dev->kobj_iolink);
 547                 dev->kobj_iolink = NULL;
 548         }
 549
 550         if (dev->kobj_cache) {
 551                 list_for_each_entry(cache, &dev->cache_props, list)
 552                         if (cache->kobj) {
 553                                 kfd_remove_sysfs_file(cache->kobj,
 554                                                         &cache->attr);
 555                                 cache->kobj = NULL;
 556                         }
 557                 kobject_del(dev->kobj_cache);
 558                 kobject_put(dev->kobj_cache);
 559                 dev->kobj_cache = NULL;
 560         }
 561
 562         if (dev->kobj_mem) {
 563                 list_for_each_entry(mem, &dev->mem_props, list)
 564                         if (mem->kobj) {
 565                                 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
 566                                 mem->kobj = NULL;
 567                         }
 568                 kobject_del(dev->kobj_mem);
 569                 kobject_put(dev->kobj_mem);
 570                 dev->kobj_mem = NULL;
 571         }
 572
 573         if (dev->kobj_perf) {
 574                 list_for_each_entry(perf, &dev->perf_props, list) {
 575                         kfree(perf->attr_group);
 576                         perf->attr_group = NULL;
 577                 }
 578                 kobject_del(dev->kobj_perf);
 579                 kobject_put(dev->kobj_perf);
 580                 dev->kobj_perf = NULL;
 581         }
 582
 583         if (dev->kobj_node) {
 584                 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
 585                 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
 586                 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
 587                 kobject_del(dev->kobj_node);
 588                 kobject_put(dev->kobj_node);
 589                 dev->kobj_node = NULL;
 590         }
 591 }
 592
 593 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
 594                 uint32_t id)
 595 {
 596         struct kfd_iolink_properties *iolink;
 597         struct kfd_cache_properties *cache;
 598         struct kfd_mem_properties *mem;
 599         struct kfd_perf_properties *perf;
 600         int ret;
 601         uint32_t i, num_attrs;
 602         struct attribute **attrs;
 603
 604         if (WARN_ON(dev->kobj_node))
 605                 return -EEXIST;
 606
 607         /*
 608          * Creating the sysfs folders
 609          */
 610         dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
 611         if (!dev->kobj_node)
 612                 return -ENOMEM;
 613
 614         ret = kobject_init_and_add(dev->kobj_node, &node_type,
 615                         sys_props.kobj_nodes, "%d", id);
 616         if (ret < 0)
 617                 return ret;
 618
 619         dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
 620         if (!dev->kobj_mem)
 621                 return -ENOMEM;
 622
 623         dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
 624         if (!dev->kobj_cache)
 625                 return -ENOMEM;
 626
 627         dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
 628         if (!dev->kobj_iolink)
 629                 return -ENOMEM;
 630
 631         dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
 632         if (!dev->kobj_perf)
 633                 return -ENOMEM;
 634
 635         /*
 636          * Creating sysfs files for node properties
 637          */
 638         dev->attr_gpuid.name = "gpu_id";
 639         dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
 640         sysfs_attr_init(&dev->attr_gpuid);
 641         dev->attr_name.name = "name";
 642         dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
 643         sysfs_attr_init(&dev->attr_name);
 644         dev->attr_props.name = "properties";
 645         dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
 646         sysfs_attr_init(&dev->attr_props);
 647         ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
 648         if (ret < 0)
 649                 return ret;
 650         ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
 651         if (ret < 0)
 652                 return ret;
 653         ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
 654         if (ret < 0)
 655                 return ret;
 656
 657         i = 0;
 658         list_for_each_entry(mem, &dev->mem_props, list) {
 659                 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 660                 if (!mem->kobj)
 661                         return -ENOMEM;
 662                 ret = kobject_init_and_add(mem->kobj, &mem_type,
 663                                 dev->kobj_mem, "%d", i);
 664                 if (ret < 0)
 665                         return ret;
 666
 667                 mem->attr.name = "properties";
 668                 mem->attr.mode = KFD_SYSFS_FILE_MODE;
 669                 sysfs_attr_init(&mem->attr);
 670                 ret = sysfs_create_file(mem->kobj, &mem->attr);
 671                 if (ret < 0)
 672                         return ret;
 673                 i++;
 674         }
 675
 676         i = 0;
 677         list_for_each_entry(cache, &dev->cache_props, list) {
 678                 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 679                 if (!cache->kobj)
 680                         return -ENOMEM;
 681                 ret = kobject_init_and_add(cache->kobj, &cache_type,
 682                                 dev->kobj_cache, "%d", i);
 683                 if (ret < 0)
 684                         return ret;
 685
 686                 cache->attr.name = "properties";
 687                 cache->attr.mode = KFD_SYSFS_FILE_MODE;
 688                 sysfs_attr_init(&cache->attr);
 689                 ret = sysfs_create_file(cache->kobj, &cache->attr);
 690                 if (ret < 0)
 691                         return ret;
 692                 i++;
 693         }
 694
 695         i = 0;
 696         list_for_each_entry(iolink, &dev->io_link_props, list) {
 697                 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 698                 if (!iolink->kobj)
 699                         return -ENOMEM;
 700                 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
 701                                 dev->kobj_iolink, "%d", i);
 702                 if (ret < 0)
 703                         return ret;
 704
 705                 iolink->attr.name = "properties";
 706                 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
 707                 sysfs_attr_init(&iolink->attr);
 708                 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
 709                 if (ret < 0)
 710                         return ret;
 711                 i++;
 712         }
 713
 714         /* All hardware blocks have the same number of attributes. */
 715         num_attrs = ARRAY_SIZE(perf_attr_iommu);
 716         list_for_each_entry(perf, &dev->perf_props, list) {
 717                 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
 718                         * num_attrs + sizeof(struct attribute_group),
 719                         GFP_KERNEL);
 720                 if (!perf->attr_group)
 721                         return -ENOMEM;
 722
 723                 attrs = (struct attribute **)(perf->attr_group + 1);
 724                 if (!strcmp(perf->block_name, "iommu")) {
 725                 /* Information of IOMMU's num_counters and counter_ids is shown
 726                  * under /sys/bus/event_source/devices/amd_iommu. We don't
 727                  * duplicate here.
 728                  */
 729                         perf_attr_iommu[0].data = perf->max_concurrent;
 730                         for (i = 0; i < num_attrs; i++)
 731                                 attrs[i] = &perf_attr_iommu[i].attr.attr;
 732                 }
 733                 perf->attr_group->name = perf->block_name;
 734                 perf->attr_group->attrs = attrs;
 735                 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
 736                 if (ret < 0)
 737                         return ret;
 738         }
 739
 740         return 0;
 741 }
 742
 743 /* Called with write topology lock acquired */
 744 static int kfd_build_sysfs_node_tree(void)
 745 {
 746         struct kfd_topology_device *dev;
 747         int ret;
 748         uint32_t i = 0;
 749
 750         list_for_each_entry(dev, &topology_device_list, list) {
 751                 ret = kfd_build_sysfs_node_entry(dev, i);
 752                 if (ret < 0)
 753                         return ret;
 754                 i++;
 755         }
 756
 757         return 0;
 758 }
 759
 760 /* Called with write topology lock acquired */
 761 static void kfd_remove_sysfs_node_tree(void)
 762 {
 763         struct kfd_topology_device *dev;
 764
 765         list_for_each_entry(dev, &topology_device_list, list)
 766                 kfd_remove_sysfs_node_entry(dev);
 767 }
 768
 769 static int kfd_topology_update_sysfs(void)
 770 {
 771         int ret;
 772
 773         pr_info("Creating topology SYSFS entries\n");
 774         if (!sys_props.kobj_topology) {
 775                 sys_props.kobj_topology =
 776                                 kfd_alloc_struct(sys_props.kobj_topology);
 777                 if (!sys_props.kobj_topology)
 778                         return -ENOMEM;
 779
 780                 ret = kobject_init_and_add(sys_props.kobj_topology,
 781                                 &sysprops_type,  &kfd_device->kobj,
 782                                 "topology");
 783                 if (ret < 0)
 784                         return ret;
 785
 786                 sys_props.kobj_nodes = kobject_create_and_add("nodes",
 787                                 sys_props.kobj_topology);
 788                 if (!sys_props.kobj_nodes)
 789                         return -ENOMEM;
 790
 791                 sys_props.attr_genid.name = "generation_id";
 792                 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
 793                 sysfs_attr_init(&sys_props.attr_genid);
 794                 ret = sysfs_create_file(sys_props.kobj_topology,
 795                                 &sys_props.attr_genid);
 796                 if (ret < 0)
 797                         return ret;
 798
 799                 sys_props.attr_props.name = "system_properties";
 800                 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
 801                 sysfs_attr_init(&sys_props.attr_props);
 802                 ret = sysfs_create_file(sys_props.kobj_topology,
 803                                 &sys_props.attr_props);
 804                 if (ret < 0)
 805                         return ret;
 806         }
 807
 808         kfd_remove_sysfs_node_tree();
 809
 810         return kfd_build_sysfs_node_tree();
 811 }
 812
 813 static void kfd_topology_release_sysfs(void)
 814 {
 815         kfd_remove_sysfs_node_tree();
 816         if (sys_props.kobj_topology) {
 817                 sysfs_remove_file(sys_props.kobj_topology,
 818                                 &sys_props.attr_genid);
 819                 sysfs_remove_file(sys_props.kobj_topology,
 820                                 &sys_props.attr_props);
 821                 if (sys_props.kobj_nodes) {
 822                         kobject_del(sys_props.kobj_nodes);
 823                         kobject_put(sys_props.kobj_nodes);
 824                         sys_props.kobj_nodes = NULL;
 825                 }
 826                 kobject_del(sys_props.kobj_topology);
 827                 kobject_put(sys_props.kobj_topology);
 828                 sys_props.kobj_topology = NULL;
 829         }
 830 }
 831
 832 /* Called with write topology_lock acquired */
 833 static void kfd_topology_update_device_list(struct list_head *temp_list,
 834                                         struct list_head *master_list)
 835 {
 836         while (!list_empty(temp_list)) {
 837                 list_move_tail(temp_list->next, master_list);
 838                 sys_props.num_devices++;
 839         }
 840 }
 841
 842 static void kfd_debug_print_topology(void)
 843 {
 844         struct kfd_topology_device *dev;
 845
 846         down_read(&topology_lock);
 847
 848         dev = list_last_entry(&topology_device_list,
 849                         struct kfd_topology_device, list);
 850         if (dev) {
 851                 if (dev->node_props.cpu_cores_count &&
 852                                 dev->node_props.simd_count) {
 853                         pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
 854                                 dev->node_props.device_id,
 855                                 dev->node_props.vendor_id);
 856                 } else if (dev->node_props.cpu_cores_count)
 857                         pr_info("Topology: Add CPU node\n");
 858                 else if (dev->node_props.simd_count)
 859                         pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
 860                                 dev->node_props.device_id,
 861                                 dev->node_props.vendor_id);
 862         }
 863         up_read(&topology_lock);
 864 }
 865
 866 /* Helper function for intializing platform_xx members of
 867  * kfd_system_properties. Uses OEM info from the last CPU/APU node.
 868  */
 869 static void kfd_update_system_properties(void)
 870 {
 871         struct kfd_topology_device *dev;
 872
 873         down_read(&topology_lock);
 874         dev = list_last_entry(&topology_device_list,
 875                         struct kfd_topology_device, list);
 876         if (dev) {
 877                 sys_props.platform_id =
 878                         (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
 879                 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
 880                 sys_props.platform_rev = dev->oem_revision;
 881         }
 882         up_read(&topology_lock);
 883 }
 884
 885 static void find_system_memory(const struct dmi_header *dm,
 886         void *private)
 887 {
 888         struct kfd_mem_properties *mem;
 889         u16 mem_width, mem_clock;
 890         struct kfd_topology_device *kdev =
 891                 (struct kfd_topology_device *)private;
 892         const u8 *dmi_data = (const u8 *)(dm + 1);
 893
 894         if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
 895                 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
 896                 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
 897                 list_for_each_entry(mem, &kdev->mem_props, list) {
 898                         if (mem_width != 0xFFFF && mem_width != 0)
 899                                 mem->width = mem_width;
 900                         if (mem_clock != 0)
 901                                 mem->mem_clk_max = mem_clock;
 902                 }
 903         }
 904 }
 905
 906 /*
 907  * Performance counters information is not part of CRAT but we would like to
 908  * put them in the sysfs under topology directory for Thunk to get the data.
 909  * This function is called before updating the sysfs.
 910  */
 911 static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev)
 912 {
 913         /* These are the only counters supported so far */
 914         return kfd_iommu_add_perf_counters(kdev);
 915 }
 916
 917 /* kfd_add_non_crat_information - Add information that is not currently
 918  *      defined in CRAT but is necessary for KFD topology
 919  * @dev - topology device to which addition info is added
 920  */
 921 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
 922 {
 923         /* Check if CPU only node. */
 924         if (!kdev->gpu) {
 925                 /* Add system memory information */
 926                 dmi_walk(find_system_memory, kdev);
 927         }
 928         /* TODO: For GPU node, rearrange code from kfd_topology_add_device */
 929 }
 930
 931 /* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices.
 932  *      Ignore CRAT for all other devices. AMD APU is identified if both CPU
 933  *      and GPU cores are present.
 934  * @device_list - topology device list created by parsing ACPI CRAT table.
 935  * @return - TRUE if invalid, FALSE is valid.
 936  */
 937 static bool kfd_is_acpi_crat_invalid(struct list_head *device_list)
 938 {
 939         struct kfd_topology_device *dev;
 940
 941         list_for_each_entry(dev, device_list, list) {
 942                 if (dev->node_props.cpu_cores_count &&
 943                         dev->node_props.simd_count)
 944                         return false;
 945         }
 946         pr_info("Ignoring ACPI CRAT on non-APU system\n");
 947         return true;
 948 }
 949
 950 int kfd_topology_init(void)
 951 {
 952         void *crat_image = NULL;
 953         size_t image_size = 0;
 954         int ret;
 955         struct list_head temp_topology_device_list;
 956         int cpu_only_node = 0;
 957         struct kfd_topology_device *kdev;
 958         int proximity_domain;
 959
 960         /* topology_device_list - Master list of all topology devices
 961          * temp_topology_device_list - temporary list created while parsing CRAT
 962          * or VCRAT. Once parsing is complete the contents of list is moved to
 963          * topology_device_list
 964          */
 965
 966         /* Initialize the head for the both the lists */
 967         INIT_LIST_HEAD(&topology_device_list);
 968         INIT_LIST_HEAD(&temp_topology_device_list);
 969         init_rwsem(&topology_lock);
 970
 971         memset(&sys_props, 0, sizeof(sys_props));
 972
 973         /* Proximity domains in ACPI CRAT tables start counting at
 974          * 0. The same should be true for virtual CRAT tables created
 975          * at this stage. GPUs added later in kfd_topology_add_device
 976          * use a counter.
 977          */
 978         proximity_domain = 0;
 979
 980         /*
 981          * Get the CRAT image from the ACPI. If ACPI doesn't have one
 982          * or if ACPI CRAT is invalid create a virtual CRAT.
 983          * NOTE: The current implementation expects all AMD APUs to have
 984          *      CRAT. If no CRAT is available, it is assumed to be a CPU
 985          */
 986         ret = kfd_create_crat_image_acpi(&crat_image, &image_size);
 987         if (!ret) {
 988                 ret = kfd_parse_crat_table(crat_image,
 989                                            &temp_topology_device_list,
 990                                            proximity_domain);
 991                 if (ret ||
 992                     kfd_is_acpi_crat_invalid(&temp_topology_device_list)) {
 993                         kfd_release_topology_device_list(
 994                                 &temp_topology_device_list);
 995                         kfd_destroy_crat_image(crat_image);
 996                         crat_image = NULL;
 997                 }
 998         }
 999
1000         if (!crat_image) {
1001                 ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
1002                                                     COMPUTE_UNIT_CPU, NULL,
1003                                                     proximity_domain);
1004                 cpu_only_node = 1;
1005                 if (ret) {
1006                         pr_err("Error creating VCRAT table for CPU\n");
1007                         return ret;
1008                 }
1009
1010                 ret = kfd_parse_crat_table(crat_image,
1011                                            &temp_topology_device_list,
1012                                            proximity_domain);
1013                 if (ret) {
1014                         pr_err("Error parsing VCRAT table for CPU\n");
1015                         goto err;
1016                 }
1017         }
1018
1019         kdev = list_first_entry(&temp_topology_device_list,
1020                                 struct kfd_topology_device, list);
1021         kfd_add_perf_to_topology(kdev);
1022
1023         down_write(&topology_lock);
1024         kfd_topology_update_device_list(&temp_topology_device_list,
1025                                         &topology_device_list);
1026         atomic_set(&topology_crat_proximity_domain, sys_props.num_devices-1);
1027         ret = kfd_topology_update_sysfs();
1028         up_write(&topology_lock);
1029
1030         if (!ret) {
1031                 sys_props.generation_count++;
1032                 kfd_update_system_properties();
1033                 kfd_debug_print_topology();
1034                 pr_info("Finished initializing topology\n");
1035         } else
1036                 pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1037
1038         /* For nodes with GPU, this information gets added
1039          * when GPU is detected (kfd_topology_add_device).
1040          */
1041         if (cpu_only_node) {
1042                 /* Add additional information to CPU only node created above */
1043                 down_write(&topology_lock);
1044                 kdev = list_first_entry(&topology_device_list,
1045                                 struct kfd_topology_device, list);
1046                 up_write(&topology_lock);
1047                 kfd_add_non_crat_information(kdev);
1048         }
1049
1050 err:
1051         kfd_destroy_crat_image(crat_image);
1052         return ret;
1053 }
1054
1055 void kfd_topology_shutdown(void)
1056 {
1057         down_write(&topology_lock);
1058         kfd_topology_release_sysfs();
1059         kfd_release_live_view();
1060         up_write(&topology_lock);
1061 }
1062
1063 static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1064 {
1065         uint32_t hashout;
1066         uint32_t buf[7];
1067         uint64_t local_mem_size;
1068         int i;
1069         struct kfd_local_mem_info local_mem_info;
1070
1071         if (!gpu)
1072                 return 0;
1073
1074         amdgpu_amdkfd_get_local_mem_info(gpu->kgd, &local_mem_info);
1075
1076         local_mem_size = local_mem_info.local_mem_size_private +
1077                         local_mem_info.local_mem_size_public;
1078
1079         buf[0] = gpu->pdev->devfn;
1080         buf[1] = gpu->pdev->subsystem_vendor;
1081         buf[2] = gpu->pdev->subsystem_device;
1082         buf[3] = gpu->pdev->device;
1083         buf[4] = gpu->pdev->bus->number;
1084         buf[5] = lower_32_bits(local_mem_size);
1085         buf[6] = upper_32_bits(local_mem_size);
1086
1087         for (i = 0, hashout = 0; i < 7; i++)
1088                 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1089
1090         return hashout;
1091 }
1092 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1093  *              the GPU device is not already present in the topology device
1094  *              list then return NULL. This means a new topology device has to
1095  *              be created for this GPU.
1096  */
1097 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1098 {
1099         struct kfd_topology_device *dev;
1100         struct kfd_topology_device *out_dev = NULL;
1101
1102         down_write(&topology_lock);
1103         list_for_each_entry(dev, &topology_device_list, list) {
1104                 /* Discrete GPUs need their own topology device list
1105                  * entries. Don't assign them to CPU/APU nodes.
1106                  */
1107                 if (!gpu->device_info->needs_iommu_device &&
1108                     dev->node_props.cpu_cores_count)
1109                         continue;
1110
1111                 if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1112                         dev->gpu = gpu;
1113                         out_dev = dev;
1114                         break;
1115                 }
1116         }
1117         up_write(&topology_lock);
1118         return out_dev;
1119 }
1120
1121 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1122 {
1123         /*
1124          * TODO: Generate an event for thunk about the arrival/removal
1125          * of the GPU
1126          */
1127 }
1128
1129 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1130  *              patch this after CRAT parsing.
1131  */
1132 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1133 {
1134         struct kfd_mem_properties *mem;
1135         struct kfd_local_mem_info local_mem_info;
1136
1137         if (!dev)
1138                 return;
1139
1140         /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1141          * single bank of VRAM local memory.
1142          * for dGPUs - VCRAT reports only one bank of Local Memory
1143          * for APUs - If CRAT from ACPI reports more than one bank, then
1144          *      all the banks will report the same mem_clk_max information
1145          */
1146         amdgpu_amdkfd_get_local_mem_info(dev->gpu->kgd, &local_mem_info);
1147
1148         list_for_each_entry(mem, &dev->mem_props, list)
1149                 mem->mem_clk_max = local_mem_info.mem_clk_max;
1150 }
1151
1152 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1153 {
1154         struct kfd_iolink_properties *link, *cpu_link;
1155         struct kfd_topology_device *cpu_dev;
1156         uint32_t cap;
1157         uint32_t cpu_flag = CRAT_IOLINK_FLAGS_ENABLED;
1158         uint32_t flag = CRAT_IOLINK_FLAGS_ENABLED;
1159
1160         if (!dev || !dev->gpu)
1161                 return;
1162
1163         pcie_capability_read_dword(dev->gpu->pdev,
1164                         PCI_EXP_DEVCAP2, &cap);
1165
1166         if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
1167                      PCI_EXP_DEVCAP2_ATOMIC_COMP64)))
1168                 cpu_flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1169                         CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1170
1171         if (!dev->gpu->pci_atomic_requested ||
1172             dev->gpu->device_info->asic_family == CHIP_HAWAII)
1173                 flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1174                         CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1175
1176         /* GPU only creates direct links so apply flags setting to all */
1177         list_for_each_entry(link, &dev->io_link_props, list) {
1178                 link->flags = flag;
1179                 cpu_dev = kfd_topology_device_by_proximity_domain(
1180                                 link->node_to);
1181                 if (cpu_dev) {
1182                         list_for_each_entry(cpu_link,
1183                                             &cpu_dev->io_link_props, list)
1184                                 if (cpu_link->node_to == link->node_from)
1185                                         cpu_link->flags = cpu_flag;
1186                 }
1187         }
1188 }
1189
1190 int kfd_topology_add_device(struct kfd_dev *gpu)
1191 {
1192         uint32_t gpu_id;
1193         struct kfd_topology_device *dev;
1194         struct kfd_cu_info cu_info;
1195         int res = 0;
1196         struct list_head temp_topology_device_list;
1197         void *crat_image = NULL;
1198         size_t image_size = 0;
1199         int proximity_domain;
1200
1201         INIT_LIST_HEAD(&temp_topology_device_list);
1202
1203         gpu_id = kfd_generate_gpu_id(gpu);
1204
1205         pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1206
1207         proximity_domain = atomic_inc_return(&topology_crat_proximity_domain);
1208
1209         /* Check to see if this gpu device exists in the topology_device_list.
1210          * If so, assign the gpu to that device,
1211          * else create a Virtual CRAT for this gpu device and then parse that
1212          * CRAT to create a new topology device. Once created assign the gpu to
1213          * that topology device
1214          */
1215         dev = kfd_assign_gpu(gpu);
1216         if (!dev) {
1217                 res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1218                                                     COMPUTE_UNIT_GPU, gpu,
1219                                                     proximity_domain);
1220                 if (res) {
1221                         pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1222                                gpu_id);
1223                         return res;
1224                 }
1225                 res = kfd_parse_crat_table(crat_image,
1226                                            &temp_topology_device_list,
1227                                            proximity_domain);
1228                 if (res) {
1229                         pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1230                                gpu_id);
1231                         goto err;
1232                 }
1233
1234                 down_write(&topology_lock);
1235                 kfd_topology_update_device_list(&temp_topology_device_list,
1236                         &topology_device_list);
1237
1238                 /* Update the SYSFS tree, since we added another topology
1239                  * device
1240                  */
1241                 res = kfd_topology_update_sysfs();
1242                 up_write(&topology_lock);
1243
1244                 if (!res)
1245                         sys_props.generation_count++;
1246                 else
1247                         pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1248                                                 gpu_id, res);
1249                 dev = kfd_assign_gpu(gpu);
1250                 if (WARN_ON(!dev)) {
1251                         res = -ENODEV;
1252                         goto err;
1253                 }
1254         }
1255
1256         dev->gpu_id = gpu_id;
1257         gpu->id = gpu_id;
1258
1259         /* TODO: Move the following lines to function
1260          *      kfd_add_non_crat_information
1261          */
1262
1263         /* Fill-in additional information that is not available in CRAT but
1264          * needed for the topology
1265          */
1266
1267         amdgpu_amdkfd_get_cu_info(dev->gpu->kgd, &cu_info);
1268         dev->node_props.simd_arrays_per_engine =
1269                 cu_info.num_shader_arrays_per_engine;
1270
1271         dev->node_props.vendor_id = gpu->pdev->vendor;
1272         dev->node_props.device_id = gpu->pdev->device;
1273         dev->node_props.location_id = PCI_DEVID(gpu->pdev->bus->number,
1274                 gpu->pdev->devfn);
1275         dev->node_props.max_engine_clk_fcompute =
1276                 amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->kgd);
1277         dev->node_props.max_engine_clk_ccompute =
1278                 cpufreq_quick_get_max(0) / 1000;
1279         dev->node_props.drm_render_minor =
1280                 gpu->shared_resources.drm_render_minor;
1281
1282         dev->node_props.hive_id = gpu->hive_id;
1283
1284         kfd_fill_mem_clk_max_info(dev);
1285         kfd_fill_iolink_non_crat_info(dev);
1286
1287         switch (dev->gpu->device_info->asic_family) {
1288         case CHIP_KAVERI:
1289         case CHIP_HAWAII:
1290         case CHIP_TONGA:
1291                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
1292                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1293                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1294                 break;
1295         case CHIP_CARRIZO:
1296         case CHIP_FIJI:
1297         case CHIP_POLARIS10:
1298         case CHIP_POLARIS11:
1299         case CHIP_POLARIS12:
1300                 pr_debug("Adding doorbell packet type capability\n");
1301                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
1302                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1303                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1304                 break;
1305         case CHIP_VEGA10:
1306         case CHIP_VEGA12:
1307         case CHIP_VEGA20:
1308         case CHIP_RAVEN:
1309                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1310                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1311                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1312                 break;
1313         default:
1314                 WARN(1, "Unexpected ASIC family %u",
1315                      dev->gpu->device_info->asic_family);
1316         }
1317
1318         /* Fix errors in CZ CRAT.
1319          * simd_count: Carrizo CRAT reports wrong simd_count, probably
1320          *              because it doesn't consider masked out CUs
1321          * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
1322          * capability flag: Carrizo CRAT doesn't report IOMMU flags
1323          */
1324         if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) {
1325                 dev->node_props.simd_count =
1326                         cu_info.simd_per_cu * cu_info.cu_active_number;
1327                 dev->node_props.max_waves_per_simd = 10;
1328                 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
1329         }
1330
1331         kfd_debug_print_topology();
1332
1333         if (!res)
1334                 kfd_notify_gpu_change(gpu_id, 1);
1335 err:
1336         kfd_destroy_crat_image(crat_image);
1337         return res;
1338 }
1339
1340 int kfd_topology_remove_device(struct kfd_dev *gpu)
1341 {
1342         struct kfd_topology_device *dev, *tmp;
1343         uint32_t gpu_id;
1344         int res = -ENODEV;
1345
1346         down_write(&topology_lock);
1347
1348         list_for_each_entry_safe(dev, tmp, &topology_device_list, list)
1349                 if (dev->gpu == gpu) {
1350                         gpu_id = dev->gpu_id;
1351                         kfd_remove_sysfs_node_entry(dev);
1352                         kfd_release_topology_device(dev);
1353                         sys_props.num_devices--;
1354                         res = 0;
1355                         if (kfd_topology_update_sysfs() < 0)
1356                                 kfd_topology_release_sysfs();
1357                         break;
1358                 }
1359
1360         up_write(&topology_lock);
1361
1362         if (!res)
1363                 kfd_notify_gpu_change(gpu_id, 0);
1364
1365         return res;
1366 }
1367
1368 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
1369  *      topology. If GPU device is found @idx, then valid kfd_dev pointer is
1370  *      returned through @kdev
1371  * Return -     0: On success (@kdev will be NULL for non GPU nodes)
1372  *              -1: If end of list
1373  */
1374 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
1375 {
1376
1377         struct kfd_topology_device *top_dev;
1378         uint8_t device_idx = 0;
1379
1380         *kdev = NULL;
1381         down_read(&topology_lock);
1382
1383         list_for_each_entry(top_dev, &topology_device_list, list) {
1384                 if (device_idx == idx) {
1385                         *kdev = top_dev->gpu;
1386                         up_read(&topology_lock);
1387                         return 0;
1388                 }
1389
1390                 device_idx++;
1391         }
1392
1393         up_read(&topology_lock);
1394
1395         return -1;
1396
1397 }
1398
1399 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
1400 {
1401         int first_cpu_of_numa_node;
1402
1403         if (!cpumask || cpumask == cpu_none_mask)
1404                 return -1;
1405         first_cpu_of_numa_node = cpumask_first(cpumask);
1406         if (first_cpu_of_numa_node >= nr_cpu_ids)
1407                 return -1;
1408 #ifdef CONFIG_X86_64
1409         return cpu_data(first_cpu_of_numa_node).apicid;
1410 #else
1411         return first_cpu_of_numa_node;
1412 #endif
1413 }
1414
1415 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
1416  *      of the given NUMA node (numa_node_id)
1417  * Return -1 on failure
1418  */
1419 int kfd_numa_node_to_apic_id(int numa_node_id)
1420 {
1421         if (numa_node_id == -1) {
1422                 pr_warn("Invalid NUMA Node. Use online CPU mask\n");
1423                 return kfd_cpumask_to_apic_id(cpu_online_mask);
1424         }
1425         return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
1426 }
1427
1428 #if defined(CONFIG_DEBUG_FS)
1429
1430 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
1431 {
1432         struct kfd_topology_device *dev;
1433         unsigned int i = 0;
1434         int r = 0;
1435
1436         down_read(&topology_lock);
1437
1438         list_for_each_entry(dev, &topology_device_list, list) {
1439                 if (!dev->gpu) {
1440                         i++;
1441                         continue;
1442                 }
1443
1444                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1445                 r = dqm_debugfs_hqds(m, dev->gpu->dqm);
1446                 if (r)
1447                         break;
1448         }
1449
1450         up_read(&topology_lock);
1451
1452         return r;
1453 }
1454
1455 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
1456 {
1457         struct kfd_topology_device *dev;
1458         unsigned int i = 0;
1459         int r = 0;
1460
1461         down_read(&topology_lock);
1462
1463         list_for_each_entry(dev, &topology_device_list, list) {
1464                 if (!dev->gpu) {
1465                         i++;
1466                         continue;
1467                 }
1468
1469                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1470                 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packets);
1471                 if (r)
1472                         break;
1473         }
1474
1475         up_read(&topology_lock);
1476
1477         return r;
1478 }
1479
1480 #endif