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
  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_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
  67 {
  68         struct kfd_topology_device *top_dev = NULL;
  69         struct kfd_topology_device *ret = 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                         ret = top_dev;
  76                         break;
  77                 }
  78
  79         up_read(&topology_lock);
  80
  81         return ret;
  82 }
  83
  84 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
  85 {
  86         struct kfd_topology_device *top_dev;
  87
  88         top_dev = kfd_topology_device_by_id(gpu_id);
  89         if (!top_dev)
  90                 return NULL;
  91
  92         return top_dev->gpu;
  93 }
  94
  95 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
  96 {
  97         struct kfd_topology_device *top_dev;
  98         struct kfd_dev *device = NULL;
  99
 100         down_read(&topology_lock);
 101
 102         list_for_each_entry(top_dev, &topology_device_list, list)
 103                 if (top_dev->gpu->pdev == pdev) {
 104                         device = top_dev->gpu;
 105                         break;
 106                 }
 107
 108         up_read(&topology_lock);
 109
 110         return device;
 111 }
 112
 113 /* Called with write topology_lock acquired */
 114 static void kfd_release_topology_device(struct kfd_topology_device *dev)
 115 {
 116         struct kfd_mem_properties *mem;
 117         struct kfd_cache_properties *cache;
 118         struct kfd_iolink_properties *iolink;
 119         struct kfd_perf_properties *perf;
 120
 121         list_del(&dev->list);
 122
 123         while (dev->mem_props.next != &dev->mem_props) {
 124                 mem = container_of(dev->mem_props.next,
 125                                 struct kfd_mem_properties, list);
 126                 list_del(&mem->list);
 127                 kfree(mem);
 128         }
 129
 130         while (dev->cache_props.next != &dev->cache_props) {
 131                 cache = container_of(dev->cache_props.next,
 132                                 struct kfd_cache_properties, list);
 133                 list_del(&cache->list);
 134                 kfree(cache);
 135         }
 136
 137         while (dev->io_link_props.next != &dev->io_link_props) {
 138                 iolink = container_of(dev->io_link_props.next,
 139                                 struct kfd_iolink_properties, list);
 140                 list_del(&iolink->list);
 141                 kfree(iolink);
 142         }
 143
 144         while (dev->perf_props.next != &dev->perf_props) {
 145                 perf = container_of(dev->perf_props.next,
 146                                 struct kfd_perf_properties, list);
 147                 list_del(&perf->list);
 148                 kfree(perf);
 149         }
 150
 151         kfree(dev);
 152 }
 153
 154 void kfd_release_topology_device_list(struct list_head *device_list)
 155 {
 156         struct kfd_topology_device *dev;
 157
 158         while (!list_empty(device_list)) {
 159                 dev = list_first_entry(device_list,
 160                                        struct kfd_topology_device, list);
 161                 kfd_release_topology_device(dev);
 162         }
 163 }
 164
 165 static void kfd_release_live_view(void)
 166 {
 167         kfd_release_topology_device_list(&topology_device_list);
 168         memset(&sys_props, 0, sizeof(sys_props));
 169 }
 170
 171 struct kfd_topology_device *kfd_create_topology_device(
 172                                 struct list_head *device_list)
 173 {
 174         struct kfd_topology_device *dev;
 175
 176         dev = kfd_alloc_struct(dev);
 177         if (!dev) {
 178                 pr_err("No memory to allocate a topology device");
 179                 return NULL;
 180         }
 181
 182         INIT_LIST_HEAD(&dev->mem_props);
 183         INIT_LIST_HEAD(&dev->cache_props);
 184         INIT_LIST_HEAD(&dev->io_link_props);
 185         INIT_LIST_HEAD(&dev->perf_props);
 186
 187         list_add_tail(&dev->list, device_list);
 188
 189         return dev;
 190 }
 191
 192
 193 #define sysfs_show_gen_prop(buffer, fmt, ...) \
 194                 snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__)
 195 #define sysfs_show_32bit_prop(buffer, name, value) \
 196                 sysfs_show_gen_prop(buffer, "%s %u\n", name, value)
 197 #define sysfs_show_64bit_prop(buffer, name, value) \
 198                 sysfs_show_gen_prop(buffer, "%s %llu\n", name, value)
 199 #define sysfs_show_32bit_val(buffer, value) \
 200                 sysfs_show_gen_prop(buffer, "%u\n", value)
 201 #define sysfs_show_str_val(buffer, value) \
 202                 sysfs_show_gen_prop(buffer, "%s\n", value)
 203
 204 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
 205                 char *buffer)
 206 {
 207         ssize_t ret;
 208
 209         /* Making sure that the buffer is an empty string */
 210         buffer[0] = 0;
 211
 212         if (attr == &sys_props.attr_genid) {
 213                 ret = sysfs_show_32bit_val(buffer, sys_props.generation_count);
 214         } else if (attr == &sys_props.attr_props) {
 215                 sysfs_show_64bit_prop(buffer, "platform_oem",
 216                                 sys_props.platform_oem);
 217                 sysfs_show_64bit_prop(buffer, "platform_id",
 218                                 sys_props.platform_id);
 219                 ret = sysfs_show_64bit_prop(buffer, "platform_rev",
 220                                 sys_props.platform_rev);
 221         } else {
 222                 ret = -EINVAL;
 223         }
 224
 225         return ret;
 226 }
 227
 228 static void kfd_topology_kobj_release(struct kobject *kobj)
 229 {
 230         kfree(kobj);
 231 }
 232
 233 static const struct sysfs_ops sysprops_ops = {
 234         .show = sysprops_show,
 235 };
 236
 237 static struct kobj_type sysprops_type = {
 238         .release = kfd_topology_kobj_release,
 239         .sysfs_ops = &sysprops_ops,
 240 };
 241
 242 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
 243                 char *buffer)
 244 {
 245         ssize_t ret;
 246         struct kfd_iolink_properties *iolink;
 247
 248         /* Making sure that the buffer is an empty string */
 249         buffer[0] = 0;
 250
 251         iolink = container_of(attr, struct kfd_iolink_properties, attr);
 252         sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type);
 253         sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj);
 254         sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min);
 255         sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from);
 256         sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to);
 257         sysfs_show_32bit_prop(buffer, "weight", iolink->weight);
 258         sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency);
 259         sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency);
 260         sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth);
 261         sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth);
 262         sysfs_show_32bit_prop(buffer, "recommended_transfer_size",
 263                         iolink->rec_transfer_size);
 264         ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags);
 265
 266         return ret;
 267 }
 268
 269 static const struct sysfs_ops iolink_ops = {
 270         .show = iolink_show,
 271 };
 272
 273 static struct kobj_type iolink_type = {
 274         .release = kfd_topology_kobj_release,
 275         .sysfs_ops = &iolink_ops,
 276 };
 277
 278 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
 279                 char *buffer)
 280 {
 281         ssize_t ret;
 282         struct kfd_mem_properties *mem;
 283
 284         /* Making sure that the buffer is an empty string */
 285         buffer[0] = 0;
 286
 287         mem = container_of(attr, struct kfd_mem_properties, attr);
 288         sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type);
 289         sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes);
 290         sysfs_show_32bit_prop(buffer, "flags", mem->flags);
 291         sysfs_show_32bit_prop(buffer, "width", mem->width);
 292         ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max);
 293
 294         return ret;
 295 }
 296
 297 static const struct sysfs_ops mem_ops = {
 298         .show = mem_show,
 299 };
 300
 301 static struct kobj_type mem_type = {
 302         .release = kfd_topology_kobj_release,
 303         .sysfs_ops = &mem_ops,
 304 };
 305
 306 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
 307                 char *buffer)
 308 {
 309         ssize_t ret;
 310         uint32_t i, j;
 311         struct kfd_cache_properties *cache;
 312
 313         /* Making sure that the buffer is an empty string */
 314         buffer[0] = 0;
 315
 316         cache = container_of(attr, struct kfd_cache_properties, attr);
 317         sysfs_show_32bit_prop(buffer, "processor_id_low",
 318                         cache->processor_id_low);
 319         sysfs_show_32bit_prop(buffer, "level", cache->cache_level);
 320         sysfs_show_32bit_prop(buffer, "size", cache->cache_size);
 321         sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size);
 322         sysfs_show_32bit_prop(buffer, "cache_lines_per_tag",
 323                         cache->cachelines_per_tag);
 324         sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc);
 325         sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency);
 326         sysfs_show_32bit_prop(buffer, "type", cache->cache_type);
 327         snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer);
 328         for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++)
 329                 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++) {
 330                         /* Check each bit */
 331                         if (cache->sibling_map[i] & (1 << j))
 332                                 ret = snprintf(buffer, PAGE_SIZE,
 333                                          "%s%d%s", buffer, 1, ",");
 334                         else
 335                                 ret = snprintf(buffer, PAGE_SIZE,
 336                                          "%s%d%s", buffer, 0, ",");
 337                 }
 338         /* Replace the last "," with end of line */
 339         *(buffer + strlen(buffer) - 1) = 0xA;
 340         return ret;
 341 }
 342
 343 static const struct sysfs_ops cache_ops = {
 344         .show = kfd_cache_show,
 345 };
 346
 347 static struct kobj_type cache_type = {
 348         .release = kfd_topology_kobj_release,
 349         .sysfs_ops = &cache_ops,
 350 };
 351
 352 /****** Sysfs of Performance Counters ******/
 353
 354 struct kfd_perf_attr {
 355         struct kobj_attribute attr;
 356         uint32_t data;
 357 };
 358
 359 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
 360                         char *buf)
 361 {
 362         struct kfd_perf_attr *attr;
 363
 364         buf[0] = 0;
 365         attr = container_of(attrs, struct kfd_perf_attr, attr);
 366         if (!attr->data) /* invalid data for PMC */
 367                 return 0;
 368         else
 369                 return sysfs_show_32bit_val(buf, attr->data);
 370 }
 371
 372 #define KFD_PERF_DESC(_name, _data)                     \
 373 {                                                       \
 374         .attr  = __ATTR(_name, 0444, perf_show, NULL),  \
 375         .data = _data,                                  \
 376 }
 377
 378 static struct kfd_perf_attr perf_attr_iommu[] = {
 379         KFD_PERF_DESC(max_concurrent, 0),
 380         KFD_PERF_DESC(num_counters, 0),
 381         KFD_PERF_DESC(counter_ids, 0),
 382 };
 383 /****************************************/
 384
 385 static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
 386                 char *buffer)
 387 {
 388         struct kfd_topology_device *dev;
 389         char public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE];
 390         uint32_t i;
 391         uint32_t log_max_watch_addr;
 392
 393         /* Making sure that the buffer is an empty string */
 394         buffer[0] = 0;
 395
 396         if (strcmp(attr->name, "gpu_id") == 0) {
 397                 dev = container_of(attr, struct kfd_topology_device,
 398                                 attr_gpuid);
 399                 return sysfs_show_32bit_val(buffer, dev->gpu_id);
 400         }
 401
 402         if (strcmp(attr->name, "name") == 0) {
 403                 dev = container_of(attr, struct kfd_topology_device,
 404                                 attr_name);
 405                 for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE; i++) {
 406                         public_name[i] =
 407                                         (char)dev->node_props.marketing_name[i];
 408                         if (dev->node_props.marketing_name[i] == 0)
 409                                 break;
 410                 }
 411                 public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1] = 0x0;
 412                 return sysfs_show_str_val(buffer, public_name);
 413         }
 414
 415         dev = container_of(attr, struct kfd_topology_device,
 416                         attr_props);
 417         sysfs_show_32bit_prop(buffer, "cpu_cores_count",
 418                         dev->node_props.cpu_cores_count);
 419         sysfs_show_32bit_prop(buffer, "simd_count",
 420                         dev->node_props.simd_count);
 421         sysfs_show_32bit_prop(buffer, "mem_banks_count",
 422                         dev->node_props.mem_banks_count);
 423         sysfs_show_32bit_prop(buffer, "caches_count",
 424                         dev->node_props.caches_count);
 425         sysfs_show_32bit_prop(buffer, "io_links_count",
 426                         dev->node_props.io_links_count);
 427         sysfs_show_32bit_prop(buffer, "cpu_core_id_base",
 428                         dev->node_props.cpu_core_id_base);
 429         sysfs_show_32bit_prop(buffer, "simd_id_base",
 430                         dev->node_props.simd_id_base);
 431         sysfs_show_32bit_prop(buffer, "max_waves_per_simd",
 432                         dev->node_props.max_waves_per_simd);
 433         sysfs_show_32bit_prop(buffer, "lds_size_in_kb",
 434                         dev->node_props.lds_size_in_kb);
 435         sysfs_show_32bit_prop(buffer, "gds_size_in_kb",
 436                         dev->node_props.gds_size_in_kb);
 437         sysfs_show_32bit_prop(buffer, "wave_front_size",
 438                         dev->node_props.wave_front_size);
 439         sysfs_show_32bit_prop(buffer, "array_count",
 440                         dev->node_props.array_count);
 441         sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine",
 442                         dev->node_props.simd_arrays_per_engine);
 443         sysfs_show_32bit_prop(buffer, "cu_per_simd_array",
 444                         dev->node_props.cu_per_simd_array);
 445         sysfs_show_32bit_prop(buffer, "simd_per_cu",
 446                         dev->node_props.simd_per_cu);
 447         sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu",
 448                         dev->node_props.max_slots_scratch_cu);
 449         sysfs_show_32bit_prop(buffer, "vendor_id",
 450                         dev->node_props.vendor_id);
 451         sysfs_show_32bit_prop(buffer, "device_id",
 452                         dev->node_props.device_id);
 453         sysfs_show_32bit_prop(buffer, "location_id",
 454                         dev->node_props.location_id);
 455         sysfs_show_32bit_prop(buffer, "drm_render_minor",
 456                         dev->node_props.drm_render_minor);
 457
 458         if (dev->gpu) {
 459                 log_max_watch_addr =
 460                         __ilog2_u32(dev->gpu->device_info->num_of_watch_points);
 461
 462                 if (log_max_watch_addr) {
 463                         dev->node_props.capability |=
 464                                         HSA_CAP_WATCH_POINTS_SUPPORTED;
 465
 466                         dev->node_props.capability |=
 467                                 ((log_max_watch_addr <<
 468                                         HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
 469                                 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
 470                 }
 471
 472                 if (dev->gpu->device_info->asic_family == CHIP_TONGA)
 473                         dev->node_props.capability |=
 474                                         HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
 475
 476                 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute",
 477                         dev->node_props.max_engine_clk_fcompute);
 478
 479                 sysfs_show_64bit_prop(buffer, "local_mem_size",
 480                                 (unsigned long long int) 0);
 481
 482                 sysfs_show_32bit_prop(buffer, "fw_version",
 483                         dev->gpu->kfd2kgd->get_fw_version(
 484                                                 dev->gpu->kgd,
 485                                                 KGD_ENGINE_MEC1));
 486                 sysfs_show_32bit_prop(buffer, "capability",
 487                                 dev->node_props.capability);
 488         }
 489
 490         return sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute",
 491                                         cpufreq_quick_get_max(0)/1000);
 492 }
 493
 494 static const struct sysfs_ops node_ops = {
 495         .show = node_show,
 496 };
 497
 498 static struct kobj_type node_type = {
 499         .release = kfd_topology_kobj_release,
 500         .sysfs_ops = &node_ops,
 501 };
 502
 503 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
 504 {
 505         sysfs_remove_file(kobj, attr);
 506         kobject_del(kobj);
 507         kobject_put(kobj);
 508 }
 509
 510 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
 511 {
 512         struct kfd_iolink_properties *iolink;
 513         struct kfd_cache_properties *cache;
 514         struct kfd_mem_properties *mem;
 515         struct kfd_perf_properties *perf;
 516
 517         if (dev->kobj_iolink) {
 518                 list_for_each_entry(iolink, &dev->io_link_props, list)
 519                         if (iolink->kobj) {
 520                                 kfd_remove_sysfs_file(iolink->kobj,
 521                                                         &iolink->attr);
 522                                 iolink->kobj = NULL;
 523                         }
 524                 kobject_del(dev->kobj_iolink);
 525                 kobject_put(dev->kobj_iolink);
 526                 dev->kobj_iolink = NULL;
 527         }
 528
 529         if (dev->kobj_cache) {
 530                 list_for_each_entry(cache, &dev->cache_props, list)
 531                         if (cache->kobj) {
 532                                 kfd_remove_sysfs_file(cache->kobj,
 533                                                         &cache->attr);
 534                                 cache->kobj = NULL;
 535                         }
 536                 kobject_del(dev->kobj_cache);
 537                 kobject_put(dev->kobj_cache);
 538                 dev->kobj_cache = NULL;
 539         }
 540
 541         if (dev->kobj_mem) {
 542                 list_for_each_entry(mem, &dev->mem_props, list)
 543                         if (mem->kobj) {
 544                                 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
 545                                 mem->kobj = NULL;
 546                         }
 547                 kobject_del(dev->kobj_mem);
 548                 kobject_put(dev->kobj_mem);
 549                 dev->kobj_mem = NULL;
 550         }
 551
 552         if (dev->kobj_perf) {
 553                 list_for_each_entry(perf, &dev->perf_props, list) {
 554                         kfree(perf->attr_group);
 555                         perf->attr_group = NULL;
 556                 }
 557                 kobject_del(dev->kobj_perf);
 558                 kobject_put(dev->kobj_perf);
 559                 dev->kobj_perf = NULL;
 560         }
 561
 562         if (dev->kobj_node) {
 563                 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
 564                 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
 565                 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
 566                 kobject_del(dev->kobj_node);
 567                 kobject_put(dev->kobj_node);
 568                 dev->kobj_node = NULL;
 569         }
 570 }
 571
 572 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
 573                 uint32_t id)
 574 {
 575         struct kfd_iolink_properties *iolink;
 576         struct kfd_cache_properties *cache;
 577         struct kfd_mem_properties *mem;
 578         struct kfd_perf_properties *perf;
 579         int ret;
 580         uint32_t i, num_attrs;
 581         struct attribute **attrs;
 582
 583         if (WARN_ON(dev->kobj_node))
 584                 return -EEXIST;
 585
 586         /*
 587          * Creating the sysfs folders
 588          */
 589         dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
 590         if (!dev->kobj_node)
 591                 return -ENOMEM;
 592
 593         ret = kobject_init_and_add(dev->kobj_node, &node_type,
 594                         sys_props.kobj_nodes, "%d", id);
 595         if (ret < 0) {
 596                 kobject_put(dev->kobj_node);
 597                 return ret;
 598         }
 599
 600         dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
 601         if (!dev->kobj_mem)
 602                 return -ENOMEM;
 603
 604         dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
 605         if (!dev->kobj_cache)
 606                 return -ENOMEM;
 607
 608         dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
 609         if (!dev->kobj_iolink)
 610                 return -ENOMEM;
 611
 612         dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
 613         if (!dev->kobj_perf)
 614                 return -ENOMEM;
 615
 616         /*
 617          * Creating sysfs files for node properties
 618          */
 619         dev->attr_gpuid.name = "gpu_id";
 620         dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
 621         sysfs_attr_init(&dev->attr_gpuid);
 622         dev->attr_name.name = "name";
 623         dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
 624         sysfs_attr_init(&dev->attr_name);
 625         dev->attr_props.name = "properties";
 626         dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
 627         sysfs_attr_init(&dev->attr_props);
 628         ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
 629         if (ret < 0)
 630                 return ret;
 631         ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
 632         if (ret < 0)
 633                 return ret;
 634         ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
 635         if (ret < 0)
 636                 return ret;
 637
 638         i = 0;
 639         list_for_each_entry(mem, &dev->mem_props, list) {
 640                 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 641                 if (!mem->kobj)
 642                         return -ENOMEM;
 643                 ret = kobject_init_and_add(mem->kobj, &mem_type,
 644                                 dev->kobj_mem, "%d", i);
 645                 if (ret < 0) {
 646                         kobject_put(mem->kobj);
 647                         return ret;
 648                 }
 649
 650                 mem->attr.name = "properties";
 651                 mem->attr.mode = KFD_SYSFS_FILE_MODE;
 652                 sysfs_attr_init(&mem->attr);
 653                 ret = sysfs_create_file(mem->kobj, &mem->attr);
 654                 if (ret < 0)
 655                         return ret;
 656                 i++;
 657         }
 658
 659         i = 0;
 660         list_for_each_entry(cache, &dev->cache_props, list) {
 661                 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 662                 if (!cache->kobj)
 663                         return -ENOMEM;
 664                 ret = kobject_init_and_add(cache->kobj, &cache_type,
 665                                 dev->kobj_cache, "%d", i);
 666                 if (ret < 0) {
 667                         kobject_put(cache->kobj);
 668                         return ret;
 669                 }
 670
 671                 cache->attr.name = "properties";
 672                 cache->attr.mode = KFD_SYSFS_FILE_MODE;
 673                 sysfs_attr_init(&cache->attr);
 674                 ret = sysfs_create_file(cache->kobj, &cache->attr);
 675                 if (ret < 0)
 676                         return ret;
 677                 i++;
 678         }
 679
 680         i = 0;
 681         list_for_each_entry(iolink, &dev->io_link_props, list) {
 682                 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 683                 if (!iolink->kobj)
 684                         return -ENOMEM;
 685                 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
 686                                 dev->kobj_iolink, "%d", i);
 687                 if (ret < 0) {
 688                         kobject_put(iolink->kobj);
 689                         return ret;
 690                 }
 691
 692                 iolink->attr.name = "properties";
 693                 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
 694                 sysfs_attr_init(&iolink->attr);
 695                 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
 696                 if (ret < 0)
 697                         return ret;
 698                 i++;
 699         }
 700
 701         /* All hardware blocks have the same number of attributes. */
 702         num_attrs = ARRAY_SIZE(perf_attr_iommu);
 703         list_for_each_entry(perf, &dev->perf_props, list) {
 704                 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
 705                         * num_attrs + sizeof(struct attribute_group),
 706                         GFP_KERNEL);
 707                 if (!perf->attr_group)
 708                         return -ENOMEM;
 709
 710                 attrs = (struct attribute **)(perf->attr_group + 1);
 711                 if (!strcmp(perf->block_name, "iommu")) {
 712                 /* Information of IOMMU's num_counters and counter_ids is shown
 713                  * under /sys/bus/event_source/devices/amd_iommu. We don't
 714                  * duplicate here.
 715                  */
 716                         perf_attr_iommu[0].data = perf->max_concurrent;
 717                         for (i = 0; i < num_attrs; i++)
 718                                 attrs[i] = &perf_attr_iommu[i].attr.attr;
 719                 }
 720                 perf->attr_group->name = perf->block_name;
 721                 perf->attr_group->attrs = attrs;
 722                 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
 723                 if (ret < 0)
 724                         return ret;
 725         }
 726
 727         return 0;
 728 }
 729
 730 /* Called with write topology lock acquired */
 731 static int kfd_build_sysfs_node_tree(void)
 732 {
 733         struct kfd_topology_device *dev;
 734         int ret;
 735         uint32_t i = 0;
 736
 737         list_for_each_entry(dev, &topology_device_list, list) {
 738                 ret = kfd_build_sysfs_node_entry(dev, i);
 739                 if (ret < 0)
 740                         return ret;
 741                 i++;
 742         }
 743
 744         return 0;
 745 }
 746
 747 /* Called with write topology lock acquired */
 748 static void kfd_remove_sysfs_node_tree(void)
 749 {
 750         struct kfd_topology_device *dev;
 751
 752         list_for_each_entry(dev, &topology_device_list, list)
 753                 kfd_remove_sysfs_node_entry(dev);
 754 }
 755
 756 static int kfd_topology_update_sysfs(void)
 757 {
 758         int ret;
 759
 760         pr_info("Creating topology SYSFS entries\n");
 761         if (!sys_props.kobj_topology) {
 762                 sys_props.kobj_topology =
 763                                 kfd_alloc_struct(sys_props.kobj_topology);
 764                 if (!sys_props.kobj_topology)
 765                         return -ENOMEM;
 766
 767                 ret = kobject_init_and_add(sys_props.kobj_topology,
 768                                 &sysprops_type,  &kfd_device->kobj,
 769                                 "topology");
 770                 if (ret < 0) {
 771                         kobject_put(sys_props.kobj_topology);
 772                         return ret;
 773                 }
 774
 775                 sys_props.kobj_nodes = kobject_create_and_add("nodes",
 776                                 sys_props.kobj_topology);
 777                 if (!sys_props.kobj_nodes)
 778                         return -ENOMEM;
 779
 780                 sys_props.attr_genid.name = "generation_id";
 781                 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
 782                 sysfs_attr_init(&sys_props.attr_genid);
 783                 ret = sysfs_create_file(sys_props.kobj_topology,
 784                                 &sys_props.attr_genid);
 785                 if (ret < 0)
 786                         return ret;
 787
 788                 sys_props.attr_props.name = "system_properties";
 789                 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
 790                 sysfs_attr_init(&sys_props.attr_props);
 791                 ret = sysfs_create_file(sys_props.kobj_topology,
 792                                 &sys_props.attr_props);
 793                 if (ret < 0)
 794                         return ret;
 795         }
 796
 797         kfd_remove_sysfs_node_tree();
 798
 799         return kfd_build_sysfs_node_tree();
 800 }
 801
 802 static void kfd_topology_release_sysfs(void)
 803 {
 804         kfd_remove_sysfs_node_tree();
 805         if (sys_props.kobj_topology) {
 806                 sysfs_remove_file(sys_props.kobj_topology,
 807                                 &sys_props.attr_genid);
 808                 sysfs_remove_file(sys_props.kobj_topology,
 809                                 &sys_props.attr_props);
 810                 if (sys_props.kobj_nodes) {
 811                         kobject_del(sys_props.kobj_nodes);
 812                         kobject_put(sys_props.kobj_nodes);
 813                         sys_props.kobj_nodes = NULL;
 814                 }
 815                 kobject_del(sys_props.kobj_topology);
 816                 kobject_put(sys_props.kobj_topology);
 817                 sys_props.kobj_topology = NULL;
 818         }
 819 }
 820
 821 /* Called with write topology_lock acquired */
 822 static void kfd_topology_update_device_list(struct list_head *temp_list,
 823                                         struct list_head *master_list)
 824 {
 825         while (!list_empty(temp_list)) {
 826                 list_move_tail(temp_list->next, master_list);
 827                 sys_props.num_devices++;
 828         }
 829 }
 830
 831 static void kfd_debug_print_topology(void)
 832 {
 833         struct kfd_topology_device *dev;
 834
 835         down_read(&topology_lock);
 836
 837         dev = list_last_entry(&topology_device_list,
 838                         struct kfd_topology_device, list);
 839         if (dev) {
 840                 if (dev->node_props.cpu_cores_count &&
 841                                 dev->node_props.simd_count) {
 842                         pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
 843                                 dev->node_props.device_id,
 844                                 dev->node_props.vendor_id);
 845                 } else if (dev->node_props.cpu_cores_count)
 846                         pr_info("Topology: Add CPU node\n");
 847                 else if (dev->node_props.simd_count)
 848                         pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
 849                                 dev->node_props.device_id,
 850                                 dev->node_props.vendor_id);
 851         }
 852         up_read(&topology_lock);
 853 }
 854
 855 /* Helper function for intializing platform_xx members of
 856  * kfd_system_properties. Uses OEM info from the last CPU/APU node.
 857  */
 858 static void kfd_update_system_properties(void)
 859 {
 860         struct kfd_topology_device *dev;
 861
 862         down_read(&topology_lock);
 863         dev = list_last_entry(&topology_device_list,
 864                         struct kfd_topology_device, list);
 865         if (dev) {
 866                 sys_props.platform_id =
 867                         (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
 868                 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
 869                 sys_props.platform_rev = dev->oem_revision;
 870         }
 871         up_read(&topology_lock);
 872 }
 873
 874 static void find_system_memory(const struct dmi_header *dm,
 875         void *private)
 876 {
 877         struct kfd_mem_properties *mem;
 878         u16 mem_width, mem_clock;
 879         struct kfd_topology_device *kdev =
 880                 (struct kfd_topology_device *)private;
 881         const u8 *dmi_data = (const u8 *)(dm + 1);
 882
 883         if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
 884                 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
 885                 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
 886                 list_for_each_entry(mem, &kdev->mem_props, list) {
 887                         if (mem_width != 0xFFFF && mem_width != 0)
 888                                 mem->width = mem_width;
 889                         if (mem_clock != 0)
 890                                 mem->mem_clk_max = mem_clock;
 891                 }
 892         }
 893 }
 894
 895 /*
 896  * Performance counters information is not part of CRAT but we would like to
 897  * put them in the sysfs under topology directory for Thunk to get the data.
 898  * This function is called before updating the sysfs.
 899  */
 900 static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev)
 901 {
 902         /* These are the only counters supported so far */
 903         return kfd_iommu_add_perf_counters(kdev);
 904 }
 905
 906 /* kfd_add_non_crat_information - Add information that is not currently
 907  *      defined in CRAT but is necessary for KFD topology
 908  * @dev - topology device to which addition info is added
 909  */
 910 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
 911 {
 912         /* Check if CPU only node. */
 913         if (!kdev->gpu) {
 914                 /* Add system memory information */
 915                 dmi_walk(find_system_memory, kdev);
 916         }
 917         /* TODO: For GPU node, rearrange code from kfd_topology_add_device */
 918 }
 919
 920 /* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices.
 921  *      Ignore CRAT for all other devices. AMD APU is identified if both CPU
 922  *      and GPU cores are present.
 923  * @device_list - topology device list created by parsing ACPI CRAT table.
 924  * @return - TRUE if invalid, FALSE is valid.
 925  */
 926 static bool kfd_is_acpi_crat_invalid(struct list_head *device_list)
 927 {
 928         struct kfd_topology_device *dev;
 929
 930         list_for_each_entry(dev, device_list, list) {
 931                 if (dev->node_props.cpu_cores_count &&
 932                         dev->node_props.simd_count)
 933                         return false;
 934         }
 935         pr_info("Ignoring ACPI CRAT on non-APU system\n");
 936         return true;
 937 }
 938
 939 int kfd_topology_init(void)
 940 {
 941         void *crat_image = NULL;
 942         size_t image_size = 0;
 943         int ret;
 944         struct list_head temp_topology_device_list;
 945         int cpu_only_node = 0;
 946         struct kfd_topology_device *kdev;
 947         int proximity_domain;
 948
 949         /* topology_device_list - Master list of all topology devices
 950          * temp_topology_device_list - temporary list created while parsing CRAT
 951          * or VCRAT. Once parsing is complete the contents of list is moved to
 952          * topology_device_list
 953          */
 954
 955         /* Initialize the head for the both the lists */
 956         INIT_LIST_HEAD(&topology_device_list);
 957         INIT_LIST_HEAD(&temp_topology_device_list);
 958         init_rwsem(&topology_lock);
 959
 960         memset(&sys_props, 0, sizeof(sys_props));
 961
 962         /* Proximity domains in ACPI CRAT tables start counting at
 963          * 0. The same should be true for virtual CRAT tables created
 964          * at this stage. GPUs added later in kfd_topology_add_device
 965          * use a counter.
 966          */
 967         proximity_domain = 0;
 968
 969         /*
 970          * Get the CRAT image from the ACPI. If ACPI doesn't have one
 971          * or if ACPI CRAT is invalid create a virtual CRAT.
 972          * NOTE: The current implementation expects all AMD APUs to have
 973          *      CRAT. If no CRAT is available, it is assumed to be a CPU
 974          */
 975         ret = kfd_create_crat_image_acpi(&crat_image, &image_size);
 976         if (!ret) {
 977                 ret = kfd_parse_crat_table(crat_image,
 978                                            &temp_topology_device_list,
 979                                            proximity_domain);
 980                 if (ret ||
 981                     kfd_is_acpi_crat_invalid(&temp_topology_device_list)) {
 982                         kfd_release_topology_device_list(
 983                                 &temp_topology_device_list);
 984                         kfd_destroy_crat_image(crat_image);
 985                         crat_image = NULL;
 986                 }
 987         }
 988
 989         if (!crat_image) {
 990                 ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
 991                                                     COMPUTE_UNIT_CPU, NULL,
 992                                                     proximity_domain);
 993                 cpu_only_node = 1;
 994                 if (ret) {
 995                         pr_err("Error creating VCRAT table for CPU\n");
 996                         return ret;
 997                 }
 998
 999                 ret = kfd_parse_crat_table(crat_image,
1000                                            &temp_topology_device_list,
1001                                            proximity_domain);
1002                 if (ret) {
1003                         pr_err("Error parsing VCRAT table for CPU\n");
1004                         goto err;
1005                 }
1006         }
1007
1008         kdev = list_first_entry(&temp_topology_device_list,
1009                                 struct kfd_topology_device, list);
1010         kfd_add_perf_to_topology(kdev);
1011
1012         down_write(&topology_lock);
1013         kfd_topology_update_device_list(&temp_topology_device_list,
1014                                         &topology_device_list);
1015         atomic_set(&topology_crat_proximity_domain, sys_props.num_devices-1);
1016         ret = kfd_topology_update_sysfs();
1017         up_write(&topology_lock);
1018
1019         if (!ret) {
1020                 sys_props.generation_count++;
1021                 kfd_update_system_properties();
1022                 kfd_debug_print_topology();
1023                 pr_info("Finished initializing topology\n");
1024         } else
1025                 pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1026
1027         /* For nodes with GPU, this information gets added
1028          * when GPU is detected (kfd_topology_add_device).
1029          */
1030         if (cpu_only_node) {
1031                 /* Add additional information to CPU only node created above */
1032                 down_write(&topology_lock);
1033                 kdev = list_first_entry(&topology_device_list,
1034                                 struct kfd_topology_device, list);
1035                 up_write(&topology_lock);
1036                 kfd_add_non_crat_information(kdev);
1037         }
1038
1039 err:
1040         kfd_destroy_crat_image(crat_image);
1041         return ret;
1042 }
1043
1044 void kfd_topology_shutdown(void)
1045 {
1046         down_write(&topology_lock);
1047         kfd_topology_release_sysfs();
1048         kfd_release_live_view();
1049         up_write(&topology_lock);
1050 }
1051
1052 static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1053 {
1054         uint32_t hashout;
1055         uint32_t buf[7];
1056         uint64_t local_mem_size;
1057         int i;
1058         struct kfd_local_mem_info local_mem_info;
1059
1060         if (!gpu)
1061                 return 0;
1062
1063         gpu->kfd2kgd->get_local_mem_info(gpu->kgd, &local_mem_info);
1064
1065         local_mem_size = local_mem_info.local_mem_size_private +
1066                         local_mem_info.local_mem_size_public;
1067
1068         buf[0] = gpu->pdev->devfn;
1069         buf[1] = gpu->pdev->subsystem_vendor;
1070         buf[2] = gpu->pdev->subsystem_device;
1071         buf[3] = gpu->pdev->device;
1072         buf[4] = gpu->pdev->bus->number;
1073         buf[5] = lower_32_bits(local_mem_size);
1074         buf[6] = upper_32_bits(local_mem_size);
1075
1076         for (i = 0, hashout = 0; i < 7; i++)
1077                 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1078
1079         return hashout;
1080 }
1081 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1082  *              the GPU device is not already present in the topology device
1083  *              list then return NULL. This means a new topology device has to
1084  *              be created for this GPU.
1085  */
1086 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1087 {
1088         struct kfd_topology_device *dev;
1089         struct kfd_topology_device *out_dev = NULL;
1090
1091         down_write(&topology_lock);
1092         list_for_each_entry(dev, &topology_device_list, list) {
1093                 /* Discrete GPUs need their own topology device list
1094                  * entries. Don't assign them to CPU/APU nodes.
1095                  */
1096                 if (!gpu->device_info->needs_iommu_device &&
1097                     dev->node_props.cpu_cores_count)
1098                         continue;
1099
1100                 if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1101                         dev->gpu = gpu;
1102                         out_dev = dev;
1103                         break;
1104                 }
1105         }
1106         up_write(&topology_lock);
1107         return out_dev;
1108 }
1109
1110 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1111 {
1112         /*
1113          * TODO: Generate an event for thunk about the arrival/removal
1114          * of the GPU
1115          */
1116 }
1117
1118 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1119  *              patch this after CRAT parsing.
1120  */
1121 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1122 {
1123         struct kfd_mem_properties *mem;
1124         struct kfd_local_mem_info local_mem_info;
1125
1126         if (!dev)
1127                 return;
1128
1129         /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1130          * single bank of VRAM local memory.
1131          * for dGPUs - VCRAT reports only one bank of Local Memory
1132          * for APUs - If CRAT from ACPI reports more than one bank, then
1133          *      all the banks will report the same mem_clk_max information
1134          */
1135         dev->gpu->kfd2kgd->get_local_mem_info(dev->gpu->kgd,
1136                 &local_mem_info);
1137
1138         list_for_each_entry(mem, &dev->mem_props, list)
1139                 mem->mem_clk_max = local_mem_info.mem_clk_max;
1140 }
1141
1142 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1143 {
1144         struct kfd_iolink_properties *link;
1145
1146         if (!dev || !dev->gpu)
1147                 return;
1148
1149         /* GPU only creates direck links so apply flags setting to all */
1150         if (dev->gpu->device_info->asic_family == CHIP_HAWAII)
1151                 list_for_each_entry(link, &dev->io_link_props, list)
1152                         link->flags = CRAT_IOLINK_FLAGS_ENABLED |
1153                                 CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1154                                 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1155 }
1156
1157 int kfd_topology_add_device(struct kfd_dev *gpu)
1158 {
1159         uint32_t gpu_id;
1160         struct kfd_topology_device *dev;
1161         struct kfd_cu_info cu_info;
1162         int res = 0;
1163         struct list_head temp_topology_device_list;
1164         void *crat_image = NULL;
1165         size_t image_size = 0;
1166         int proximity_domain;
1167
1168         INIT_LIST_HEAD(&temp_topology_device_list);
1169
1170         gpu_id = kfd_generate_gpu_id(gpu);
1171
1172         pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1173
1174         proximity_domain = atomic_inc_return(&topology_crat_proximity_domain);
1175
1176         /* Check to see if this gpu device exists in the topology_device_list.
1177          * If so, assign the gpu to that device,
1178          * else create a Virtual CRAT for this gpu device and then parse that
1179          * CRAT to create a new topology device. Once created assign the gpu to
1180          * that topology device
1181          */
1182         dev = kfd_assign_gpu(gpu);
1183         if (!dev) {
1184                 res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1185                                                     COMPUTE_UNIT_GPU, gpu,
1186                                                     proximity_domain);
1187                 if (res) {
1188                         pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1189                                gpu_id);
1190                         return res;
1191                 }
1192                 res = kfd_parse_crat_table(crat_image,
1193                                            &temp_topology_device_list,
1194                                            proximity_domain);
1195                 if (res) {
1196                         pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1197                                gpu_id);
1198                         goto err;
1199                 }
1200
1201                 down_write(&topology_lock);
1202                 kfd_topology_update_device_list(&temp_topology_device_list,
1203                         &topology_device_list);
1204
1205                 /* Update the SYSFS tree, since we added another topology
1206                  * device
1207                  */
1208                 res = kfd_topology_update_sysfs();
1209                 up_write(&topology_lock);
1210
1211                 if (!res)
1212                         sys_props.generation_count++;
1213                 else
1214                         pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1215                                                 gpu_id, res);
1216                 dev = kfd_assign_gpu(gpu);
1217                 if (WARN_ON(!dev)) {
1218                         res = -ENODEV;
1219                         goto err;
1220                 }
1221         }
1222
1223         dev->gpu_id = gpu_id;
1224         gpu->id = gpu_id;
1225
1226         /* TODO: Move the following lines to function
1227          *      kfd_add_non_crat_information
1228          */
1229
1230         /* Fill-in additional information that is not available in CRAT but
1231          * needed for the topology
1232          */
1233
1234         dev->gpu->kfd2kgd->get_cu_info(dev->gpu->kgd, &cu_info);
1235         dev->node_props.simd_arrays_per_engine =
1236                 cu_info.num_shader_arrays_per_engine;
1237
1238         dev->node_props.vendor_id = gpu->pdev->vendor;
1239         dev->node_props.device_id = gpu->pdev->device;
1240         dev->node_props.location_id = PCI_DEVID(gpu->pdev->bus->number,
1241                 gpu->pdev->devfn);
1242         dev->node_props.max_engine_clk_fcompute =
1243                 dev->gpu->kfd2kgd->get_max_engine_clock_in_mhz(dev->gpu->kgd);
1244         dev->node_props.max_engine_clk_ccompute =
1245                 cpufreq_quick_get_max(0) / 1000;
1246         dev->node_props.drm_render_minor =
1247                 gpu->shared_resources.drm_render_minor;
1248
1249         kfd_fill_mem_clk_max_info(dev);
1250         kfd_fill_iolink_non_crat_info(dev);
1251
1252         switch (dev->gpu->device_info->asic_family) {
1253         case CHIP_KAVERI:
1254         case CHIP_HAWAII:
1255         case CHIP_TONGA:
1256                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
1257                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1258                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1259                 break;
1260         case CHIP_CARRIZO:
1261         case CHIP_FIJI:
1262         case CHIP_POLARIS10:
1263         case CHIP_POLARIS11:
1264                 pr_debug("Adding doorbell packet type capability\n");
1265                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
1266                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1267                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1268                 break;
1269         case CHIP_VEGA10:
1270         case CHIP_RAVEN:
1271                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1272                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1273                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1274                 break;
1275         default:
1276                 WARN(1, "Unexpected ASIC family %u",
1277                      dev->gpu->device_info->asic_family);
1278         }
1279
1280         /* Fix errors in CZ CRAT.
1281          * simd_count: Carrizo CRAT reports wrong simd_count, probably
1282          *              because it doesn't consider masked out CUs
1283          * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
1284          * capability flag: Carrizo CRAT doesn't report IOMMU flags
1285          */
1286         if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) {
1287                 dev->node_props.simd_count =
1288                         cu_info.simd_per_cu * cu_info.cu_active_number;
1289                 dev->node_props.max_waves_per_simd = 10;
1290                 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
1291         }
1292
1293         kfd_debug_print_topology();
1294
1295         if (!res)
1296                 kfd_notify_gpu_change(gpu_id, 1);
1297 err:
1298         kfd_destroy_crat_image(crat_image);
1299         return res;
1300 }
1301
1302 int kfd_topology_remove_device(struct kfd_dev *gpu)
1303 {
1304         struct kfd_topology_device *dev, *tmp;
1305         uint32_t gpu_id;
1306         int res = -ENODEV;
1307
1308         down_write(&topology_lock);
1309
1310         list_for_each_entry_safe(dev, tmp, &topology_device_list, list)
1311                 if (dev->gpu == gpu) {
1312                         gpu_id = dev->gpu_id;
1313                         kfd_remove_sysfs_node_entry(dev);
1314                         kfd_release_topology_device(dev);
1315                         sys_props.num_devices--;
1316                         res = 0;
1317                         if (kfd_topology_update_sysfs() < 0)
1318                                 kfd_topology_release_sysfs();
1319                         break;
1320                 }
1321
1322         up_write(&topology_lock);
1323
1324         if (!res)
1325                 kfd_notify_gpu_change(gpu_id, 0);
1326
1327         return res;
1328 }
1329
1330 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
1331  *      topology. If GPU device is found @idx, then valid kfd_dev pointer is
1332  *      returned through @kdev
1333  * Return -     0: On success (@kdev will be NULL for non GPU nodes)
1334  *              -1: If end of list
1335  */
1336 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
1337 {
1338
1339         struct kfd_topology_device *top_dev;
1340         uint8_t device_idx = 0;
1341
1342         *kdev = NULL;
1343         down_read(&topology_lock);
1344
1345         list_for_each_entry(top_dev, &topology_device_list, list) {
1346                 if (device_idx == idx) {
1347                         *kdev = top_dev->gpu;
1348                         up_read(&topology_lock);
1349                         return 0;
1350                 }
1351
1352                 device_idx++;
1353         }
1354
1355         up_read(&topology_lock);
1356
1357         return -1;
1358
1359 }
1360
1361 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
1362 {
1363         const struct cpuinfo_x86 *cpuinfo;
1364         int first_cpu_of_numa_node;
1365
1366         if (!cpumask || cpumask == cpu_none_mask)
1367                 return -1;
1368         first_cpu_of_numa_node = cpumask_first(cpumask);
1369         if (first_cpu_of_numa_node >= nr_cpu_ids)
1370                 return -1;
1371         cpuinfo = &cpu_data(first_cpu_of_numa_node);
1372
1373         return cpuinfo->apicid;
1374 }
1375
1376 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
1377  *      of the given NUMA node (numa_node_id)
1378  * Return -1 on failure
1379  */
1380 int kfd_numa_node_to_apic_id(int numa_node_id)
1381 {
1382         if (numa_node_id == -1) {
1383                 pr_warn("Invalid NUMA Node. Use online CPU mask\n");
1384                 return kfd_cpumask_to_apic_id(cpu_online_mask);
1385         }
1386         return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
1387 }
1388
1389 #if defined(CONFIG_DEBUG_FS)
1390
1391 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
1392 {
1393         struct kfd_topology_device *dev;
1394         unsigned int i = 0;
1395         int r = 0;
1396
1397         down_read(&topology_lock);
1398
1399         list_for_each_entry(dev, &topology_device_list, list) {
1400                 if (!dev->gpu) {
1401                         i++;
1402                         continue;
1403                 }
1404
1405                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1406                 r = dqm_debugfs_hqds(m, dev->gpu->dqm);
1407                 if (r)
1408                         break;
1409         }
1410
1411         up_read(&topology_lock);
1412
1413         return r;
1414 }
1415
1416 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
1417 {
1418         struct kfd_topology_device *dev;
1419         unsigned int i = 0;
1420         int r = 0;
1421
1422         down_read(&topology_lock);
1423
1424         list_for_each_entry(dev, &topology_device_list, list) {
1425                 if (!dev->gpu) {
1426                         i++;
1427                         continue;
1428                 }
1429
1430                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1431                 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packets);
1432                 if (r)
1433                         break;
1434         }
1435
1436         up_read(&topology_lock);
1437
1438         return r;
1439 }
1440
1441 #endif