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 "kfd_svm.h"
  40 #include "amdgpu_amdkfd.h"
  41 #include "amdgpu_ras.h"
  42
  43 /* topology_device_list - Master list of all topology devices */
  44 static struct list_head topology_device_list;
  45 static struct kfd_system_properties sys_props;
  46
  47 static DECLARE_RWSEM(topology_lock);
  48 static atomic_t topology_crat_proximity_domain;
  49
  50 struct kfd_topology_device *kfd_topology_device_by_proximity_domain(
  51                                                 uint32_t proximity_domain)
  52 {
  53         struct kfd_topology_device *top_dev;
  54         struct kfd_topology_device *device = NULL;
  55
  56         down_read(&topology_lock);
  57
  58         list_for_each_entry(top_dev, &topology_device_list, list)
  59                 if (top_dev->proximity_domain == proximity_domain) {
  60                         device = top_dev;
  61                         break;
  62                 }
  63
  64         up_read(&topology_lock);
  65
  66         return device;
  67 }
  68
  69 struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
  70 {
  71         struct kfd_topology_device *top_dev = NULL;
  72         struct kfd_topology_device *ret = NULL;
  73
  74         down_read(&topology_lock);
  75
  76         list_for_each_entry(top_dev, &topology_device_list, list)
  77                 if (top_dev->gpu_id == gpu_id) {
  78                         ret = top_dev;
  79                         break;
  80                 }
  81
  82         up_read(&topology_lock);
  83
  84         return ret;
  85 }
  86
  87 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
  88 {
  89         struct kfd_topology_device *top_dev;
  90
  91         top_dev = kfd_topology_device_by_id(gpu_id);
  92         if (!top_dev)
  93                 return NULL;
  94
  95         return top_dev->gpu;
  96 }
  97
  98 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
  99 {
 100         struct kfd_topology_device *top_dev;
 101         struct kfd_dev *device = NULL;
 102
 103         down_read(&topology_lock);
 104
 105         list_for_each_entry(top_dev, &topology_device_list, list)
 106                 if (top_dev->gpu && top_dev->gpu->pdev == pdev) {
 107                         device = top_dev->gpu;
 108                         break;
 109                 }
 110
 111         up_read(&topology_lock);
 112
 113         return device;
 114 }
 115
 116 struct kfd_dev *kfd_device_by_kgd(const struct kgd_dev *kgd)
 117 {
 118         struct kfd_topology_device *top_dev;
 119         struct kfd_dev *device = NULL;
 120
 121         down_read(&topology_lock);
 122
 123         list_for_each_entry(top_dev, &topology_device_list, list)
 124                 if (top_dev->gpu && top_dev->gpu->kgd == kgd) {
 125                         device = top_dev->gpu;
 126                         break;
 127                 }
 128
 129         up_read(&topology_lock);
 130
 131         return device;
 132 }
 133
 134 /* Called with write topology_lock acquired */
 135 static void kfd_release_topology_device(struct kfd_topology_device *dev)
 136 {
 137         struct kfd_mem_properties *mem;
 138         struct kfd_cache_properties *cache;
 139         struct kfd_iolink_properties *iolink;
 140         struct kfd_perf_properties *perf;
 141
 142         list_del(&dev->list);
 143
 144         while (dev->mem_props.next != &dev->mem_props) {
 145                 mem = container_of(dev->mem_props.next,
 146                                 struct kfd_mem_properties, list);
 147                 list_del(&mem->list);
 148                 kfree(mem);
 149         }
 150
 151         while (dev->cache_props.next != &dev->cache_props) {
 152                 cache = container_of(dev->cache_props.next,
 153                                 struct kfd_cache_properties, list);
 154                 list_del(&cache->list);
 155                 kfree(cache);
 156         }
 157
 158         while (dev->io_link_props.next != &dev->io_link_props) {
 159                 iolink = container_of(dev->io_link_props.next,
 160                                 struct kfd_iolink_properties, list);
 161                 list_del(&iolink->list);
 162                 kfree(iolink);
 163         }
 164
 165         while (dev->perf_props.next != &dev->perf_props) {
 166                 perf = container_of(dev->perf_props.next,
 167                                 struct kfd_perf_properties, list);
 168                 list_del(&perf->list);
 169                 kfree(perf);
 170         }
 171
 172         kfree(dev);
 173 }
 174
 175 void kfd_release_topology_device_list(struct list_head *device_list)
 176 {
 177         struct kfd_topology_device *dev;
 178
 179         while (!list_empty(device_list)) {
 180                 dev = list_first_entry(device_list,
 181                                        struct kfd_topology_device, list);
 182                 kfd_release_topology_device(dev);
 183         }
 184 }
 185
 186 static void kfd_release_live_view(void)
 187 {
 188         kfd_release_topology_device_list(&topology_device_list);
 189         memset(&sys_props, 0, sizeof(sys_props));
 190 }
 191
 192 struct kfd_topology_device *kfd_create_topology_device(
 193                                 struct list_head *device_list)
 194 {
 195         struct kfd_topology_device *dev;
 196
 197         dev = kfd_alloc_struct(dev);
 198         if (!dev) {
 199                 pr_err("No memory to allocate a topology device");
 200                 return NULL;
 201         }
 202
 203         INIT_LIST_HEAD(&dev->mem_props);
 204         INIT_LIST_HEAD(&dev->cache_props);
 205         INIT_LIST_HEAD(&dev->io_link_props);
 206         INIT_LIST_HEAD(&dev->perf_props);
 207
 208         list_add_tail(&dev->list, device_list);
 209
 210         return dev;
 211 }
 212
 213
 214 #define sysfs_show_gen_prop(buffer, offs, fmt, ...)             \
 215                 (offs += snprintf(buffer+offs, PAGE_SIZE-offs,  \
 216                                   fmt, __VA_ARGS__))
 217 #define sysfs_show_32bit_prop(buffer, offs, name, value) \
 218                 sysfs_show_gen_prop(buffer, offs, "%s %u\n", name, value)
 219 #define sysfs_show_64bit_prop(buffer, offs, name, value) \
 220                 sysfs_show_gen_prop(buffer, offs, "%s %llu\n", name, value)
 221 #define sysfs_show_32bit_val(buffer, offs, value) \
 222                 sysfs_show_gen_prop(buffer, offs, "%u\n", value)
 223 #define sysfs_show_str_val(buffer, offs, value) \
 224                 sysfs_show_gen_prop(buffer, offs, "%s\n", value)
 225
 226 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
 227                 char *buffer)
 228 {
 229         int offs = 0;
 230
 231         /* Making sure that the buffer is an empty string */
 232         buffer[0] = 0;
 233
 234         if (attr == &sys_props.attr_genid) {
 235                 sysfs_show_32bit_val(buffer, offs,
 236                                      sys_props.generation_count);
 237         } else if (attr == &sys_props.attr_props) {
 238                 sysfs_show_64bit_prop(buffer, offs, "platform_oem",
 239                                       sys_props.platform_oem);
 240                 sysfs_show_64bit_prop(buffer, offs, "platform_id",
 241                                       sys_props.platform_id);
 242                 sysfs_show_64bit_prop(buffer, offs, "platform_rev",
 243                                       sys_props.platform_rev);
 244         } else {
 245                 offs = -EINVAL;
 246         }
 247
 248         return offs;
 249 }
 250
 251 static void kfd_topology_kobj_release(struct kobject *kobj)
 252 {
 253         kfree(kobj);
 254 }
 255
 256 static const struct sysfs_ops sysprops_ops = {
 257         .show = sysprops_show,
 258 };
 259
 260 static struct kobj_type sysprops_type = {
 261         .release = kfd_topology_kobj_release,
 262         .sysfs_ops = &sysprops_ops,
 263 };
 264
 265 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
 266                 char *buffer)
 267 {
 268         int offs = 0;
 269         struct kfd_iolink_properties *iolink;
 270
 271         /* Making sure that the buffer is an empty string */
 272         buffer[0] = 0;
 273
 274         iolink = container_of(attr, struct kfd_iolink_properties, attr);
 275         if (iolink->gpu && kfd_devcgroup_check_permission(iolink->gpu))
 276                 return -EPERM;
 277         sysfs_show_32bit_prop(buffer, offs, "type", iolink->iolink_type);
 278         sysfs_show_32bit_prop(buffer, offs, "version_major", iolink->ver_maj);
 279         sysfs_show_32bit_prop(buffer, offs, "version_minor", iolink->ver_min);
 280         sysfs_show_32bit_prop(buffer, offs, "node_from", iolink->node_from);
 281         sysfs_show_32bit_prop(buffer, offs, "node_to", iolink->node_to);
 282         sysfs_show_32bit_prop(buffer, offs, "weight", iolink->weight);
 283         sysfs_show_32bit_prop(buffer, offs, "min_latency", iolink->min_latency);
 284         sysfs_show_32bit_prop(buffer, offs, "max_latency", iolink->max_latency);
 285         sysfs_show_32bit_prop(buffer, offs, "min_bandwidth",
 286                               iolink->min_bandwidth);
 287         sysfs_show_32bit_prop(buffer, offs, "max_bandwidth",
 288                               iolink->max_bandwidth);
 289         sysfs_show_32bit_prop(buffer, offs, "recommended_transfer_size",
 290                               iolink->rec_transfer_size);
 291         sysfs_show_32bit_prop(buffer, offs, "flags", iolink->flags);
 292
 293         return offs;
 294 }
 295
 296 static const struct sysfs_ops iolink_ops = {
 297         .show = iolink_show,
 298 };
 299
 300 static struct kobj_type iolink_type = {
 301         .release = kfd_topology_kobj_release,
 302         .sysfs_ops = &iolink_ops,
 303 };
 304
 305 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
 306                 char *buffer)
 307 {
 308         int offs = 0;
 309         struct kfd_mem_properties *mem;
 310
 311         /* Making sure that the buffer is an empty string */
 312         buffer[0] = 0;
 313
 314         mem = container_of(attr, struct kfd_mem_properties, attr);
 315         if (mem->gpu && kfd_devcgroup_check_permission(mem->gpu))
 316                 return -EPERM;
 317         sysfs_show_32bit_prop(buffer, offs, "heap_type", mem->heap_type);
 318         sysfs_show_64bit_prop(buffer, offs, "size_in_bytes",
 319                               mem->size_in_bytes);
 320         sysfs_show_32bit_prop(buffer, offs, "flags", mem->flags);
 321         sysfs_show_32bit_prop(buffer, offs, "width", mem->width);
 322         sysfs_show_32bit_prop(buffer, offs, "mem_clk_max",
 323                               mem->mem_clk_max);
 324
 325         return offs;
 326 }
 327
 328 static const struct sysfs_ops mem_ops = {
 329         .show = mem_show,
 330 };
 331
 332 static struct kobj_type mem_type = {
 333         .release = kfd_topology_kobj_release,
 334         .sysfs_ops = &mem_ops,
 335 };
 336
 337 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
 338                 char *buffer)
 339 {
 340         int offs = 0;
 341         uint32_t i, j;
 342         struct kfd_cache_properties *cache;
 343
 344         /* Making sure that the buffer is an empty string */
 345         buffer[0] = 0;
 346
 347         cache = container_of(attr, struct kfd_cache_properties, attr);
 348         if (cache->gpu && kfd_devcgroup_check_permission(cache->gpu))
 349                 return -EPERM;
 350         sysfs_show_32bit_prop(buffer, offs, "processor_id_low",
 351                         cache->processor_id_low);
 352         sysfs_show_32bit_prop(buffer, offs, "level", cache->cache_level);
 353         sysfs_show_32bit_prop(buffer, offs, "size", cache->cache_size);
 354         sysfs_show_32bit_prop(buffer, offs, "cache_line_size",
 355                               cache->cacheline_size);
 356         sysfs_show_32bit_prop(buffer, offs, "cache_lines_per_tag",
 357                               cache->cachelines_per_tag);
 358         sysfs_show_32bit_prop(buffer, offs, "association", cache->cache_assoc);
 359         sysfs_show_32bit_prop(buffer, offs, "latency", cache->cache_latency);
 360         sysfs_show_32bit_prop(buffer, offs, "type", cache->cache_type);
 361         offs += snprintf(buffer+offs, PAGE_SIZE-offs, "sibling_map ");
 362         for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++)
 363                 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++)
 364                         /* Check each bit */
 365                         offs += snprintf(buffer+offs, PAGE_SIZE-offs, "%d,",
 366                                          (cache->sibling_map[i] >> j) & 1);
 367
 368         /* Replace the last "," with end of line */
 369         buffer[offs-1] = '\n';
 370         return offs;
 371 }
 372
 373 static const struct sysfs_ops cache_ops = {
 374         .show = kfd_cache_show,
 375 };
 376
 377 static struct kobj_type cache_type = {
 378         .release = kfd_topology_kobj_release,
 379         .sysfs_ops = &cache_ops,
 380 };
 381
 382 /****** Sysfs of Performance Counters ******/
 383
 384 struct kfd_perf_attr {
 385         struct kobj_attribute attr;
 386         uint32_t data;
 387 };
 388
 389 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
 390                         char *buf)
 391 {
 392         int offs = 0;
 393         struct kfd_perf_attr *attr;
 394
 395         buf[0] = 0;
 396         attr = container_of(attrs, struct kfd_perf_attr, attr);
 397         if (!attr->data) /* invalid data for PMC */
 398                 return 0;
 399         else
 400                 return sysfs_show_32bit_val(buf, offs, attr->data);
 401 }
 402
 403 #define KFD_PERF_DESC(_name, _data)                     \
 404 {                                                       \
 405         .attr  = __ATTR(_name, 0444, perf_show, NULL),  \
 406         .data = _data,                                  \
 407 }
 408
 409 static struct kfd_perf_attr perf_attr_iommu[] = {
 410         KFD_PERF_DESC(max_concurrent, 0),
 411         KFD_PERF_DESC(num_counters, 0),
 412         KFD_PERF_DESC(counter_ids, 0),
 413 };
 414 /****************************************/
 415
 416 static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
 417                 char *buffer)
 418 {
 419         int offs = 0;
 420         struct kfd_topology_device *dev;
 421         uint32_t log_max_watch_addr;
 422
 423         /* Making sure that the buffer is an empty string */
 424         buffer[0] = 0;
 425
 426         if (strcmp(attr->name, "gpu_id") == 0) {
 427                 dev = container_of(attr, struct kfd_topology_device,
 428                                 attr_gpuid);
 429                 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 430                         return -EPERM;
 431                 return sysfs_show_32bit_val(buffer, offs, dev->gpu_id);
 432         }
 433
 434         if (strcmp(attr->name, "name") == 0) {
 435                 dev = container_of(attr, struct kfd_topology_device,
 436                                 attr_name);
 437
 438                 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 439                         return -EPERM;
 440                 return sysfs_show_str_val(buffer, offs, dev->node_props.name);
 441         }
 442
 443         dev = container_of(attr, struct kfd_topology_device,
 444                         attr_props);
 445         if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 446                 return -EPERM;
 447         sysfs_show_32bit_prop(buffer, offs, "cpu_cores_count",
 448                               dev->node_props.cpu_cores_count);
 449         sysfs_show_32bit_prop(buffer, offs, "simd_count",
 450                               dev->gpu ? dev->node_props.simd_count : 0);
 451         sysfs_show_32bit_prop(buffer, offs, "mem_banks_count",
 452                               dev->node_props.mem_banks_count);
 453         sysfs_show_32bit_prop(buffer, offs, "caches_count",
 454                               dev->node_props.caches_count);
 455         sysfs_show_32bit_prop(buffer, offs, "io_links_count",
 456                               dev->node_props.io_links_count);
 457         sysfs_show_32bit_prop(buffer, offs, "cpu_core_id_base",
 458                               dev->node_props.cpu_core_id_base);
 459         sysfs_show_32bit_prop(buffer, offs, "simd_id_base",
 460                               dev->node_props.simd_id_base);
 461         sysfs_show_32bit_prop(buffer, offs, "max_waves_per_simd",
 462                               dev->node_props.max_waves_per_simd);
 463         sysfs_show_32bit_prop(buffer, offs, "lds_size_in_kb",
 464                               dev->node_props.lds_size_in_kb);
 465         sysfs_show_32bit_prop(buffer, offs, "gds_size_in_kb",
 466                               dev->node_props.gds_size_in_kb);
 467         sysfs_show_32bit_prop(buffer, offs, "num_gws",
 468                               dev->node_props.num_gws);
 469         sysfs_show_32bit_prop(buffer, offs, "wave_front_size",
 470                               dev->node_props.wave_front_size);
 471         sysfs_show_32bit_prop(buffer, offs, "array_count",
 472                               dev->node_props.array_count);
 473         sysfs_show_32bit_prop(buffer, offs, "simd_arrays_per_engine",
 474                               dev->node_props.simd_arrays_per_engine);
 475         sysfs_show_32bit_prop(buffer, offs, "cu_per_simd_array",
 476                               dev->node_props.cu_per_simd_array);
 477         sysfs_show_32bit_prop(buffer, offs, "simd_per_cu",
 478                               dev->node_props.simd_per_cu);
 479         sysfs_show_32bit_prop(buffer, offs, "max_slots_scratch_cu",
 480                               dev->node_props.max_slots_scratch_cu);
 481         sysfs_show_32bit_prop(buffer, offs, "vendor_id",
 482                               dev->node_props.vendor_id);
 483         sysfs_show_32bit_prop(buffer, offs, "device_id",
 484                               dev->node_props.device_id);
 485         sysfs_show_32bit_prop(buffer, offs, "location_id",
 486                               dev->node_props.location_id);
 487         sysfs_show_32bit_prop(buffer, offs, "domain",
 488                               dev->node_props.domain);
 489         sysfs_show_32bit_prop(buffer, offs, "drm_render_minor",
 490                               dev->node_props.drm_render_minor);
 491         sysfs_show_64bit_prop(buffer, offs, "hive_id",
 492                               dev->node_props.hive_id);
 493         sysfs_show_32bit_prop(buffer, offs, "num_sdma_engines",
 494                               dev->node_props.num_sdma_engines);
 495         sysfs_show_32bit_prop(buffer, offs, "num_sdma_xgmi_engines",
 496                               dev->node_props.num_sdma_xgmi_engines);
 497         sysfs_show_32bit_prop(buffer, offs, "num_sdma_queues_per_engine",
 498                               dev->node_props.num_sdma_queues_per_engine);
 499         sysfs_show_32bit_prop(buffer, offs, "num_cp_queues",
 500                               dev->node_props.num_cp_queues);
 501
 502         if (dev->gpu) {
 503                 log_max_watch_addr =
 504                         __ilog2_u32(dev->gpu->device_info->num_of_watch_points);
 505
 506                 if (log_max_watch_addr) {
 507                         dev->node_props.capability |=
 508                                         HSA_CAP_WATCH_POINTS_SUPPORTED;
 509
 510                         dev->node_props.capability |=
 511                                 ((log_max_watch_addr <<
 512                                         HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
 513                                 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
 514                 }
 515
 516                 if (dev->gpu->device_info->asic_family == CHIP_TONGA)
 517                         dev->node_props.capability |=
 518                                         HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
 519
 520                 sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_fcompute",
 521                         dev->node_props.max_engine_clk_fcompute);
 522
 523                 sysfs_show_64bit_prop(buffer, offs, "local_mem_size", 0ULL);
 524
 525                 sysfs_show_32bit_prop(buffer, offs, "fw_version",
 526                                       dev->gpu->mec_fw_version);
 527                 sysfs_show_32bit_prop(buffer, offs, "capability",
 528                                       dev->node_props.capability);
 529                 sysfs_show_32bit_prop(buffer, offs, "sdma_fw_version",
 530                                       dev->gpu->sdma_fw_version);
 531                 sysfs_show_64bit_prop(buffer, offs, "unique_id",
 532                                       amdgpu_amdkfd_get_unique_id(dev->gpu->kgd));
 533
 534         }
 535
 536         return sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_ccompute",
 537                                      cpufreq_quick_get_max(0)/1000);
 538 }
 539
 540 static const struct sysfs_ops node_ops = {
 541         .show = node_show,
 542 };
 543
 544 static struct kobj_type node_type = {
 545         .release = kfd_topology_kobj_release,
 546         .sysfs_ops = &node_ops,
 547 };
 548
 549 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
 550 {
 551         sysfs_remove_file(kobj, attr);
 552         kobject_del(kobj);
 553         kobject_put(kobj);
 554 }
 555
 556 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
 557 {
 558         struct kfd_iolink_properties *iolink;
 559         struct kfd_cache_properties *cache;
 560         struct kfd_mem_properties *mem;
 561         struct kfd_perf_properties *perf;
 562
 563         if (dev->kobj_iolink) {
 564                 list_for_each_entry(iolink, &dev->io_link_props, list)
 565                         if (iolink->kobj) {
 566                                 kfd_remove_sysfs_file(iolink->kobj,
 567                                                         &iolink->attr);
 568                                 iolink->kobj = NULL;
 569                         }
 570                 kobject_del(dev->kobj_iolink);
 571                 kobject_put(dev->kobj_iolink);
 572                 dev->kobj_iolink = NULL;
 573         }
 574
 575         if (dev->kobj_cache) {
 576                 list_for_each_entry(cache, &dev->cache_props, list)
 577                         if (cache->kobj) {
 578                                 kfd_remove_sysfs_file(cache->kobj,
 579                                                         &cache->attr);
 580                                 cache->kobj = NULL;
 581                         }
 582                 kobject_del(dev->kobj_cache);
 583                 kobject_put(dev->kobj_cache);
 584                 dev->kobj_cache = NULL;
 585         }
 586
 587         if (dev->kobj_mem) {
 588                 list_for_each_entry(mem, &dev->mem_props, list)
 589                         if (mem->kobj) {
 590                                 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
 591                                 mem->kobj = NULL;
 592                         }
 593                 kobject_del(dev->kobj_mem);
 594                 kobject_put(dev->kobj_mem);
 595                 dev->kobj_mem = NULL;
 596         }
 597
 598         if (dev->kobj_perf) {
 599                 list_for_each_entry(perf, &dev->perf_props, list) {
 600                         kfree(perf->attr_group);
 601                         perf->attr_group = NULL;
 602                 }
 603                 kobject_del(dev->kobj_perf);
 604                 kobject_put(dev->kobj_perf);
 605                 dev->kobj_perf = NULL;
 606         }
 607
 608         if (dev->kobj_node) {
 609                 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
 610                 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
 611                 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
 612                 kobject_del(dev->kobj_node);
 613                 kobject_put(dev->kobj_node);
 614                 dev->kobj_node = NULL;
 615         }
 616 }
 617
 618 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
 619                 uint32_t id)
 620 {
 621         struct kfd_iolink_properties *iolink;
 622         struct kfd_cache_properties *cache;
 623         struct kfd_mem_properties *mem;
 624         struct kfd_perf_properties *perf;
 625         int ret;
 626         uint32_t i, num_attrs;
 627         struct attribute **attrs;
 628
 629         if (WARN_ON(dev->kobj_node))
 630                 return -EEXIST;
 631
 632         /*
 633          * Creating the sysfs folders
 634          */
 635         dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
 636         if (!dev->kobj_node)
 637                 return -ENOMEM;
 638
 639         ret = kobject_init_and_add(dev->kobj_node, &node_type,
 640                         sys_props.kobj_nodes, "%d", id);
 641         if (ret < 0) {
 642                 kobject_put(dev->kobj_node);
 643                 return ret;
 644         }
 645
 646         dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
 647         if (!dev->kobj_mem)
 648                 return -ENOMEM;
 649
 650         dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
 651         if (!dev->kobj_cache)
 652                 return -ENOMEM;
 653
 654         dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
 655         if (!dev->kobj_iolink)
 656                 return -ENOMEM;
 657
 658         dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
 659         if (!dev->kobj_perf)
 660                 return -ENOMEM;
 661
 662         /*
 663          * Creating sysfs files for node properties
 664          */
 665         dev->attr_gpuid.name = "gpu_id";
 666         dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
 667         sysfs_attr_init(&dev->attr_gpuid);
 668         dev->attr_name.name = "name";
 669         dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
 670         sysfs_attr_init(&dev->attr_name);
 671         dev->attr_props.name = "properties";
 672         dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
 673         sysfs_attr_init(&dev->attr_props);
 674         ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
 675         if (ret < 0)
 676                 return ret;
 677         ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
 678         if (ret < 0)
 679                 return ret;
 680         ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
 681         if (ret < 0)
 682                 return ret;
 683
 684         i = 0;
 685         list_for_each_entry(mem, &dev->mem_props, list) {
 686                 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 687                 if (!mem->kobj)
 688                         return -ENOMEM;
 689                 ret = kobject_init_and_add(mem->kobj, &mem_type,
 690                                 dev->kobj_mem, "%d", i);
 691                 if (ret < 0) {
 692                         kobject_put(mem->kobj);
 693                         return ret;
 694                 }
 695
 696                 mem->attr.name = "properties";
 697                 mem->attr.mode = KFD_SYSFS_FILE_MODE;
 698                 sysfs_attr_init(&mem->attr);
 699                 ret = sysfs_create_file(mem->kobj, &mem->attr);
 700                 if (ret < 0)
 701                         return ret;
 702                 i++;
 703         }
 704
 705         i = 0;
 706         list_for_each_entry(cache, &dev->cache_props, list) {
 707                 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 708                 if (!cache->kobj)
 709                         return -ENOMEM;
 710                 ret = kobject_init_and_add(cache->kobj, &cache_type,
 711                                 dev->kobj_cache, "%d", i);
 712                 if (ret < 0) {
 713                         kobject_put(cache->kobj);
 714                         return ret;
 715                 }
 716
 717                 cache->attr.name = "properties";
 718                 cache->attr.mode = KFD_SYSFS_FILE_MODE;
 719                 sysfs_attr_init(&cache->attr);
 720                 ret = sysfs_create_file(cache->kobj, &cache->attr);
 721                 if (ret < 0)
 722                         return ret;
 723                 i++;
 724         }
 725
 726         i = 0;
 727         list_for_each_entry(iolink, &dev->io_link_props, list) {
 728                 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 729                 if (!iolink->kobj)
 730                         return -ENOMEM;
 731                 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
 732                                 dev->kobj_iolink, "%d", i);
 733                 if (ret < 0) {
 734                         kobject_put(iolink->kobj);
 735                         return ret;
 736                 }
 737
 738                 iolink->attr.name = "properties";
 739                 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
 740                 sysfs_attr_init(&iolink->attr);
 741                 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
 742                 if (ret < 0)
 743                         return ret;
 744                 i++;
 745         }
 746
 747         /* All hardware blocks have the same number of attributes. */
 748         num_attrs = ARRAY_SIZE(perf_attr_iommu);
 749         list_for_each_entry(perf, &dev->perf_props, list) {
 750                 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
 751                         * num_attrs + sizeof(struct attribute_group),
 752                         GFP_KERNEL);
 753                 if (!perf->attr_group)
 754                         return -ENOMEM;
 755
 756                 attrs = (struct attribute **)(perf->attr_group + 1);
 757                 if (!strcmp(perf->block_name, "iommu")) {
 758                 /* Information of IOMMU's num_counters and counter_ids is shown
 759                  * under /sys/bus/event_source/devices/amd_iommu. We don't
 760                  * duplicate here.
 761                  */
 762                         perf_attr_iommu[0].data = perf->max_concurrent;
 763                         for (i = 0; i < num_attrs; i++)
 764                                 attrs[i] = &perf_attr_iommu[i].attr.attr;
 765                 }
 766                 perf->attr_group->name = perf->block_name;
 767                 perf->attr_group->attrs = attrs;
 768                 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
 769                 if (ret < 0)
 770                         return ret;
 771         }
 772
 773         return 0;
 774 }
 775
 776 /* Called with write topology lock acquired */
 777 static int kfd_build_sysfs_node_tree(void)
 778 {
 779         struct kfd_topology_device *dev;
 780         int ret;
 781         uint32_t i = 0;
 782
 783         list_for_each_entry(dev, &topology_device_list, list) {
 784                 ret = kfd_build_sysfs_node_entry(dev, i);
 785                 if (ret < 0)
 786                         return ret;
 787                 i++;
 788         }
 789
 790         return 0;
 791 }
 792
 793 /* Called with write topology lock acquired */
 794 static void kfd_remove_sysfs_node_tree(void)
 795 {
 796         struct kfd_topology_device *dev;
 797
 798         list_for_each_entry(dev, &topology_device_list, list)
 799                 kfd_remove_sysfs_node_entry(dev);
 800 }
 801
 802 static int kfd_topology_update_sysfs(void)
 803 {
 804         int ret;
 805
 806         if (!sys_props.kobj_topology) {
 807                 sys_props.kobj_topology =
 808                                 kfd_alloc_struct(sys_props.kobj_topology);
 809                 if (!sys_props.kobj_topology)
 810                         return -ENOMEM;
 811
 812                 ret = kobject_init_and_add(sys_props.kobj_topology,
 813                                 &sysprops_type,  &kfd_device->kobj,
 814                                 "topology");
 815                 if (ret < 0) {
 816                         kobject_put(sys_props.kobj_topology);
 817                         return ret;
 818                 }
 819
 820                 sys_props.kobj_nodes = kobject_create_and_add("nodes",
 821                                 sys_props.kobj_topology);
 822                 if (!sys_props.kobj_nodes)
 823                         return -ENOMEM;
 824
 825                 sys_props.attr_genid.name = "generation_id";
 826                 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
 827                 sysfs_attr_init(&sys_props.attr_genid);
 828                 ret = sysfs_create_file(sys_props.kobj_topology,
 829                                 &sys_props.attr_genid);
 830                 if (ret < 0)
 831                         return ret;
 832
 833                 sys_props.attr_props.name = "system_properties";
 834                 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
 835                 sysfs_attr_init(&sys_props.attr_props);
 836                 ret = sysfs_create_file(sys_props.kobj_topology,
 837                                 &sys_props.attr_props);
 838                 if (ret < 0)
 839                         return ret;
 840         }
 841
 842         kfd_remove_sysfs_node_tree();
 843
 844         return kfd_build_sysfs_node_tree();
 845 }
 846
 847 static void kfd_topology_release_sysfs(void)
 848 {
 849         kfd_remove_sysfs_node_tree();
 850         if (sys_props.kobj_topology) {
 851                 sysfs_remove_file(sys_props.kobj_topology,
 852                                 &sys_props.attr_genid);
 853                 sysfs_remove_file(sys_props.kobj_topology,
 854                                 &sys_props.attr_props);
 855                 if (sys_props.kobj_nodes) {
 856                         kobject_del(sys_props.kobj_nodes);
 857                         kobject_put(sys_props.kobj_nodes);
 858                         sys_props.kobj_nodes = NULL;
 859                 }
 860                 kobject_del(sys_props.kobj_topology);
 861                 kobject_put(sys_props.kobj_topology);
 862                 sys_props.kobj_topology = NULL;
 863         }
 864 }
 865
 866 /* Called with write topology_lock acquired */
 867 static void kfd_topology_update_device_list(struct list_head *temp_list,
 868                                         struct list_head *master_list)
 869 {
 870         while (!list_empty(temp_list)) {
 871                 list_move_tail(temp_list->next, master_list);
 872                 sys_props.num_devices++;
 873         }
 874 }
 875
 876 static void kfd_debug_print_topology(void)
 877 {
 878         struct kfd_topology_device *dev;
 879
 880         down_read(&topology_lock);
 881
 882         dev = list_last_entry(&topology_device_list,
 883                         struct kfd_topology_device, list);
 884         if (dev) {
 885                 if (dev->node_props.cpu_cores_count &&
 886                                 dev->node_props.simd_count) {
 887                         pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
 888                                 dev->node_props.device_id,
 889                                 dev->node_props.vendor_id);
 890                 } else if (dev->node_props.cpu_cores_count)
 891                         pr_info("Topology: Add CPU node\n");
 892                 else if (dev->node_props.simd_count)
 893                         pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
 894                                 dev->node_props.device_id,
 895                                 dev->node_props.vendor_id);
 896         }
 897         up_read(&topology_lock);
 898 }
 899
 900 /* Helper function for intializing platform_xx members of
 901  * kfd_system_properties. Uses OEM info from the last CPU/APU node.
 902  */
 903 static void kfd_update_system_properties(void)
 904 {
 905         struct kfd_topology_device *dev;
 906
 907         down_read(&topology_lock);
 908         dev = list_last_entry(&topology_device_list,
 909                         struct kfd_topology_device, list);
 910         if (dev) {
 911                 sys_props.platform_id =
 912                         (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
 913                 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
 914                 sys_props.platform_rev = dev->oem_revision;
 915         }
 916         up_read(&topology_lock);
 917 }
 918
 919 static void find_system_memory(const struct dmi_header *dm,
 920         void *private)
 921 {
 922         struct kfd_mem_properties *mem;
 923         u16 mem_width, mem_clock;
 924         struct kfd_topology_device *kdev =
 925                 (struct kfd_topology_device *)private;
 926         const u8 *dmi_data = (const u8 *)(dm + 1);
 927
 928         if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
 929                 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
 930                 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
 931                 list_for_each_entry(mem, &kdev->mem_props, list) {
 932                         if (mem_width != 0xFFFF && mem_width != 0)
 933                                 mem->width = mem_width;
 934                         if (mem_clock != 0)
 935                                 mem->mem_clk_max = mem_clock;
 936                 }
 937         }
 938 }
 939
 940 /*
 941  * Performance counters information is not part of CRAT but we would like to
 942  * put them in the sysfs under topology directory for Thunk to get the data.
 943  * This function is called before updating the sysfs.
 944  */
 945 static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev)
 946 {
 947         /* These are the only counters supported so far */
 948         return kfd_iommu_add_perf_counters(kdev);
 949 }
 950
 951 /* kfd_add_non_crat_information - Add information that is not currently
 952  *      defined in CRAT but is necessary for KFD topology
 953  * @dev - topology device to which addition info is added
 954  */
 955 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
 956 {
 957         /* Check if CPU only node. */
 958         if (!kdev->gpu) {
 959                 /* Add system memory information */
 960                 dmi_walk(find_system_memory, kdev);
 961         }
 962         /* TODO: For GPU node, rearrange code from kfd_topology_add_device */
 963 }
 964
 965 /* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices.
 966  *      Ignore CRAT for all other devices. AMD APU is identified if both CPU
 967  *      and GPU cores are present.
 968  * @device_list - topology device list created by parsing ACPI CRAT table.
 969  * @return - TRUE if invalid, FALSE is valid.
 970  */
 971 static bool kfd_is_acpi_crat_invalid(struct list_head *device_list)
 972 {
 973         struct kfd_topology_device *dev;
 974
 975         list_for_each_entry(dev, device_list, list) {
 976                 if (dev->node_props.cpu_cores_count &&
 977                         dev->node_props.simd_count)
 978                         return false;
 979         }
 980         pr_info("Ignoring ACPI CRAT on non-APU system\n");
 981         return true;
 982 }
 983
 984 int kfd_topology_init(void)
 985 {
 986         void *crat_image = NULL;
 987         size_t image_size = 0;
 988         int ret;
 989         struct list_head temp_topology_device_list;
 990         int cpu_only_node = 0;
 991         struct kfd_topology_device *kdev;
 992         int proximity_domain;
 993
 994         /* topology_device_list - Master list of all topology devices
 995          * temp_topology_device_list - temporary list created while parsing CRAT
 996          * or VCRAT. Once parsing is complete the contents of list is moved to
 997          * topology_device_list
 998          */
 999
1000         /* Initialize the head for the both the lists */
1001         INIT_LIST_HEAD(&topology_device_list);
1002         INIT_LIST_HEAD(&temp_topology_device_list);
1003         init_rwsem(&topology_lock);
1004
1005         memset(&sys_props, 0, sizeof(sys_props));
1006
1007         /* Proximity domains in ACPI CRAT tables start counting at
1008          * 0. The same should be true for virtual CRAT tables created
1009          * at this stage. GPUs added later in kfd_topology_add_device
1010          * use a counter.
1011          */
1012         proximity_domain = 0;
1013
1014         /*
1015          * Get the CRAT image from the ACPI. If ACPI doesn't have one
1016          * or if ACPI CRAT is invalid create a virtual CRAT.
1017          * NOTE: The current implementation expects all AMD APUs to have
1018          *      CRAT. If no CRAT is available, it is assumed to be a CPU
1019          */
1020         ret = kfd_create_crat_image_acpi(&crat_image, &image_size);
1021         if (!ret) {
1022                 ret = kfd_parse_crat_table(crat_image,
1023                                            &temp_topology_device_list,
1024                                            proximity_domain);
1025                 if (ret ||
1026                     kfd_is_acpi_crat_invalid(&temp_topology_device_list)) {
1027                         kfd_release_topology_device_list(
1028                                 &temp_topology_device_list);
1029                         kfd_destroy_crat_image(crat_image);
1030                         crat_image = NULL;
1031                 }
1032         }
1033
1034         if (!crat_image) {
1035                 ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
1036                                                     COMPUTE_UNIT_CPU, NULL,
1037                                                     proximity_domain);
1038                 cpu_only_node = 1;
1039                 if (ret) {
1040                         pr_err("Error creating VCRAT table for CPU\n");
1041                         return ret;
1042                 }
1043
1044                 ret = kfd_parse_crat_table(crat_image,
1045                                            &temp_topology_device_list,
1046                                            proximity_domain);
1047                 if (ret) {
1048                         pr_err("Error parsing VCRAT table for CPU\n");
1049                         goto err;
1050                 }
1051         }
1052
1053         kdev = list_first_entry(&temp_topology_device_list,
1054                                 struct kfd_topology_device, list);
1055         kfd_add_perf_to_topology(kdev);
1056
1057         down_write(&topology_lock);
1058         kfd_topology_update_device_list(&temp_topology_device_list,
1059                                         &topology_device_list);
1060         atomic_set(&topology_crat_proximity_domain, sys_props.num_devices-1);
1061         ret = kfd_topology_update_sysfs();
1062         up_write(&topology_lock);
1063
1064         if (!ret) {
1065                 sys_props.generation_count++;
1066                 kfd_update_system_properties();
1067                 kfd_debug_print_topology();
1068         } else
1069                 pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1070
1071         /* For nodes with GPU, this information gets added
1072          * when GPU is detected (kfd_topology_add_device).
1073          */
1074         if (cpu_only_node) {
1075                 /* Add additional information to CPU only node created above */
1076                 down_write(&topology_lock);
1077                 kdev = list_first_entry(&topology_device_list,
1078                                 struct kfd_topology_device, list);
1079                 up_write(&topology_lock);
1080                 kfd_add_non_crat_information(kdev);
1081         }
1082
1083 err:
1084         kfd_destroy_crat_image(crat_image);
1085         return ret;
1086 }
1087
1088 void kfd_topology_shutdown(void)
1089 {
1090         down_write(&topology_lock);
1091         kfd_topology_release_sysfs();
1092         kfd_release_live_view();
1093         up_write(&topology_lock);
1094 }
1095
1096 static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1097 {
1098         uint32_t hashout;
1099         uint32_t buf[7];
1100         uint64_t local_mem_size;
1101         int i;
1102         struct kfd_local_mem_info local_mem_info;
1103
1104         if (!gpu)
1105                 return 0;
1106
1107         amdgpu_amdkfd_get_local_mem_info(gpu->kgd, &local_mem_info);
1108
1109         local_mem_size = local_mem_info.local_mem_size_private +
1110                         local_mem_info.local_mem_size_public;
1111
1112         buf[0] = gpu->pdev->devfn;
1113         buf[1] = gpu->pdev->subsystem_vendor |
1114                 (gpu->pdev->subsystem_device << 16);
1115         buf[2] = pci_domain_nr(gpu->pdev->bus);
1116         buf[3] = gpu->pdev->device;
1117         buf[4] = gpu->pdev->bus->number;
1118         buf[5] = lower_32_bits(local_mem_size);
1119         buf[6] = upper_32_bits(local_mem_size);
1120
1121         for (i = 0, hashout = 0; i < 7; i++)
1122                 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1123
1124         return hashout;
1125 }
1126 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1127  *              the GPU device is not already present in the topology device
1128  *              list then return NULL. This means a new topology device has to
1129  *              be created for this GPU.
1130  */
1131 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1132 {
1133         struct kfd_topology_device *dev;
1134         struct kfd_topology_device *out_dev = NULL;
1135         struct kfd_mem_properties *mem;
1136         struct kfd_cache_properties *cache;
1137         struct kfd_iolink_properties *iolink;
1138
1139         down_write(&topology_lock);
1140         list_for_each_entry(dev, &topology_device_list, list) {
1141                 /* Discrete GPUs need their own topology device list
1142                  * entries. Don't assign them to CPU/APU nodes.
1143                  */
1144                 if (!gpu->use_iommu_v2 &&
1145                     dev->node_props.cpu_cores_count)
1146                         continue;
1147
1148                 if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1149                         dev->gpu = gpu;
1150                         out_dev = dev;
1151
1152                         list_for_each_entry(mem, &dev->mem_props, list)
1153                                 mem->gpu = dev->gpu;
1154                         list_for_each_entry(cache, &dev->cache_props, list)
1155                                 cache->gpu = dev->gpu;
1156                         list_for_each_entry(iolink, &dev->io_link_props, list)
1157                                 iolink->gpu = dev->gpu;
1158                         break;
1159                 }
1160         }
1161         up_write(&topology_lock);
1162         return out_dev;
1163 }
1164
1165 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1166 {
1167         /*
1168          * TODO: Generate an event for thunk about the arrival/removal
1169          * of the GPU
1170          */
1171 }
1172
1173 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1174  *              patch this after CRAT parsing.
1175  */
1176 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1177 {
1178         struct kfd_mem_properties *mem;
1179         struct kfd_local_mem_info local_mem_info;
1180
1181         if (!dev)
1182                 return;
1183
1184         /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1185          * single bank of VRAM local memory.
1186          * for dGPUs - VCRAT reports only one bank of Local Memory
1187          * for APUs - If CRAT from ACPI reports more than one bank, then
1188          *      all the banks will report the same mem_clk_max information
1189          */
1190         amdgpu_amdkfd_get_local_mem_info(dev->gpu->kgd, &local_mem_info);
1191
1192         list_for_each_entry(mem, &dev->mem_props, list)
1193                 mem->mem_clk_max = local_mem_info.mem_clk_max;
1194 }
1195
1196 static void kfd_set_iolink_no_atomics(struct kfd_topology_device *dev,
1197                                         struct kfd_topology_device *target_gpu_dev,
1198                                         struct kfd_iolink_properties *link)
1199 {
1200         /* xgmi always supports atomics between links. */
1201         if (link->iolink_type == CRAT_IOLINK_TYPE_XGMI)
1202                 return;
1203
1204         /* check pcie support to set cpu(dev) flags for target_gpu_dev link. */
1205         if (target_gpu_dev) {
1206                 uint32_t cap;
1207
1208                 pcie_capability_read_dword(target_gpu_dev->gpu->pdev,
1209                                 PCI_EXP_DEVCAP2, &cap);
1210
1211                 if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
1212                              PCI_EXP_DEVCAP2_ATOMIC_COMP64)))
1213                         link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1214                                 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1215         /* set gpu (dev) flags. */
1216         } else {
1217                 if (!dev->gpu->pci_atomic_requested ||
1218                                 dev->gpu->device_info->asic_family ==
1219                                                         CHIP_HAWAII)
1220                         link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1221                                 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1222         }
1223 }
1224
1225 static void kfd_set_iolink_non_coherent(struct kfd_topology_device *to_dev,
1226                 struct kfd_iolink_properties *outbound_link,
1227                 struct kfd_iolink_properties *inbound_link)
1228 {
1229         /* CPU -> GPU with PCIe */
1230         if (!to_dev->gpu &&
1231             inbound_link->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS)
1232                 inbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1233
1234         if (to_dev->gpu) {
1235                 /* GPU <-> GPU with PCIe and
1236                  * Vega20 with XGMI
1237                  */
1238                 if (inbound_link->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS ||
1239                     (inbound_link->iolink_type == CRAT_IOLINK_TYPE_XGMI &&
1240                     to_dev->gpu->device_info->asic_family == CHIP_VEGA20)) {
1241                         outbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1242                         inbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1243                 }
1244         }
1245 }
1246
1247 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1248 {
1249         struct kfd_iolink_properties *link, *inbound_link;
1250         struct kfd_topology_device *peer_dev;
1251
1252         if (!dev || !dev->gpu)
1253                 return;
1254
1255         /* GPU only creates direct links so apply flags setting to all */
1256         list_for_each_entry(link, &dev->io_link_props, list) {
1257                 link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1258                 kfd_set_iolink_no_atomics(dev, NULL, link);
1259                 peer_dev = kfd_topology_device_by_proximity_domain(
1260                                 link->node_to);
1261
1262                 if (!peer_dev)
1263                         continue;
1264
1265                 list_for_each_entry(inbound_link, &peer_dev->io_link_props,
1266                                                                         list) {
1267                         if (inbound_link->node_to != link->node_from)
1268                                 continue;
1269
1270                         inbound_link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1271                         kfd_set_iolink_no_atomics(peer_dev, dev, inbound_link);
1272                         kfd_set_iolink_non_coherent(peer_dev, link, inbound_link);
1273                 }
1274         }
1275 }
1276
1277 int kfd_topology_add_device(struct kfd_dev *gpu)
1278 {
1279         uint32_t gpu_id;
1280         struct kfd_topology_device *dev;
1281         struct kfd_cu_info cu_info;
1282         int res = 0;
1283         struct list_head temp_topology_device_list;
1284         void *crat_image = NULL;
1285         size_t image_size = 0;
1286         int proximity_domain;
1287         struct amdgpu_device *adev;
1288
1289         INIT_LIST_HEAD(&temp_topology_device_list);
1290
1291         gpu_id = kfd_generate_gpu_id(gpu);
1292
1293         pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1294
1295         proximity_domain = atomic_inc_return(&topology_crat_proximity_domain);
1296
1297         /* Check to see if this gpu device exists in the topology_device_list.
1298          * If so, assign the gpu to that device,
1299          * else create a Virtual CRAT for this gpu device and then parse that
1300          * CRAT to create a new topology device. Once created assign the gpu to
1301          * that topology device
1302          */
1303         dev = kfd_assign_gpu(gpu);
1304         if (!dev) {
1305                 res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1306                                                     COMPUTE_UNIT_GPU, gpu,
1307                                                     proximity_domain);
1308                 if (res) {
1309                         pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1310                                gpu_id);
1311                         return res;
1312                 }
1313                 res = kfd_parse_crat_table(crat_image,
1314                                            &temp_topology_device_list,
1315                                            proximity_domain);
1316                 if (res) {
1317                         pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1318                                gpu_id);
1319                         goto err;
1320                 }
1321
1322                 down_write(&topology_lock);
1323                 kfd_topology_update_device_list(&temp_topology_device_list,
1324                         &topology_device_list);
1325
1326                 /* Update the SYSFS tree, since we added another topology
1327                  * device
1328                  */
1329                 res = kfd_topology_update_sysfs();
1330                 up_write(&topology_lock);
1331
1332                 if (!res)
1333                         sys_props.generation_count++;
1334                 else
1335                         pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1336                                                 gpu_id, res);
1337                 dev = kfd_assign_gpu(gpu);
1338                 if (WARN_ON(!dev)) {
1339                         res = -ENODEV;
1340                         goto err;
1341                 }
1342         }
1343
1344         dev->gpu_id = gpu_id;
1345         gpu->id = gpu_id;
1346
1347         /* TODO: Move the following lines to function
1348          *      kfd_add_non_crat_information
1349          */
1350
1351         /* Fill-in additional information that is not available in CRAT but
1352          * needed for the topology
1353          */
1354
1355         amdgpu_amdkfd_get_cu_info(dev->gpu->kgd, &cu_info);
1356
1357         strncpy(dev->node_props.name, gpu->device_info->asic_name,
1358                         KFD_TOPOLOGY_PUBLIC_NAME_SIZE);
1359
1360         dev->node_props.simd_arrays_per_engine =
1361                 cu_info.num_shader_arrays_per_engine;
1362
1363         dev->node_props.vendor_id = gpu->pdev->vendor;
1364         dev->node_props.device_id = gpu->pdev->device;
1365         dev->node_props.capability |=
1366                 ((amdgpu_amdkfd_get_asic_rev_id(dev->gpu->kgd) <<
1367                         HSA_CAP_ASIC_REVISION_SHIFT) &
1368                         HSA_CAP_ASIC_REVISION_MASK);
1369         dev->node_props.location_id = pci_dev_id(gpu->pdev);
1370         dev->node_props.domain = pci_domain_nr(gpu->pdev->bus);
1371         dev->node_props.max_engine_clk_fcompute =
1372                 amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->kgd);
1373         dev->node_props.max_engine_clk_ccompute =
1374                 cpufreq_quick_get_max(0) / 1000;
1375         dev->node_props.drm_render_minor =
1376                 gpu->shared_resources.drm_render_minor;
1377
1378         dev->node_props.hive_id = gpu->hive_id;
1379         dev->node_props.num_sdma_engines = gpu->device_info->num_sdma_engines;
1380         dev->node_props.num_sdma_xgmi_engines =
1381                                 gpu->device_info->num_xgmi_sdma_engines;
1382         dev->node_props.num_sdma_queues_per_engine =
1383                                 gpu->device_info->num_sdma_queues_per_engine;
1384         dev->node_props.num_gws = (dev->gpu->gws &&
1385                 dev->gpu->dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) ?
1386                 amdgpu_amdkfd_get_num_gws(dev->gpu->kgd) : 0;
1387         dev->node_props.num_cp_queues = get_cp_queues_num(dev->gpu->dqm);
1388
1389         kfd_fill_mem_clk_max_info(dev);
1390         kfd_fill_iolink_non_crat_info(dev);
1391
1392         switch (dev->gpu->device_info->asic_family) {
1393         case CHIP_KAVERI:
1394         case CHIP_HAWAII:
1395         case CHIP_TONGA:
1396                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
1397                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1398                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1399                 break;
1400         case CHIP_CARRIZO:
1401         case CHIP_FIJI:
1402         case CHIP_POLARIS10:
1403         case CHIP_POLARIS11:
1404         case CHIP_POLARIS12:
1405         case CHIP_VEGAM:
1406                 pr_debug("Adding doorbell packet type capability\n");
1407                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
1408                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1409                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1410                 break;
1411         case CHIP_VEGA10:
1412         case CHIP_VEGA12:
1413         case CHIP_VEGA20:
1414         case CHIP_RAVEN:
1415         case CHIP_RENOIR:
1416         case CHIP_ARCTURUS:
1417         case CHIP_ALDEBARAN:
1418         case CHIP_NAVI10:
1419         case CHIP_NAVI12:
1420         case CHIP_NAVI14:
1421         case CHIP_SIENNA_CICHLID:
1422         case CHIP_NAVY_FLOUNDER:
1423         case CHIP_VANGOGH:
1424         case CHIP_DIMGREY_CAVEFISH:
1425         case CHIP_BEIGE_GOBY:
1426         case CHIP_YELLOW_CARP:
1427                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1428                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1429                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1430                 break;
1431         default:
1432                 WARN(1, "Unexpected ASIC family %u",
1433                      dev->gpu->device_info->asic_family);
1434         }
1435
1436         /*
1437         * Overwrite ATS capability according to needs_iommu_device to fix
1438         * potential missing corresponding bit in CRAT of BIOS.
1439         */
1440         if (dev->gpu->use_iommu_v2)
1441                 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
1442         else
1443                 dev->node_props.capability &= ~HSA_CAP_ATS_PRESENT;
1444
1445         /* Fix errors in CZ CRAT.
1446          * simd_count: Carrizo CRAT reports wrong simd_count, probably
1447          *              because it doesn't consider masked out CUs
1448          * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
1449          */
1450         if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) {
1451                 dev->node_props.simd_count =
1452                         cu_info.simd_per_cu * cu_info.cu_active_number;
1453                 dev->node_props.max_waves_per_simd = 10;
1454         }
1455
1456         adev = (struct amdgpu_device *)(dev->gpu->kgd);
1457         /* kfd only concerns sram ecc on GFX and HBM ecc on UMC */
1458         dev->node_props.capability |=
1459                 ((adev->ras_enabled & BIT(AMDGPU_RAS_BLOCK__GFX)) != 0) ?
1460                 HSA_CAP_SRAM_EDCSUPPORTED : 0;
1461         dev->node_props.capability |= ((adev->ras_enabled & BIT(AMDGPU_RAS_BLOCK__UMC)) != 0) ?
1462                 HSA_CAP_MEM_EDCSUPPORTED : 0;
1463
1464         if (adev->asic_type != CHIP_VEGA10)
1465                 dev->node_props.capability |= (adev->ras_enabled != 0) ?
1466                         HSA_CAP_RASEVENTNOTIFY : 0;
1467
1468         if (KFD_IS_SVM_API_SUPPORTED(adev->kfd.dev))
1469                 dev->node_props.capability |= HSA_CAP_SVMAPI_SUPPORTED;
1470
1471         kfd_debug_print_topology();
1472
1473         if (!res)
1474                 kfd_notify_gpu_change(gpu_id, 1);
1475 err:
1476         kfd_destroy_crat_image(crat_image);
1477         return res;
1478 }
1479
1480 int kfd_topology_remove_device(struct kfd_dev *gpu)
1481 {
1482         struct kfd_topology_device *dev, *tmp;
1483         uint32_t gpu_id;
1484         int res = -ENODEV;
1485
1486         down_write(&topology_lock);
1487
1488         list_for_each_entry_safe(dev, tmp, &topology_device_list, list)
1489                 if (dev->gpu == gpu) {
1490                         gpu_id = dev->gpu_id;
1491                         kfd_remove_sysfs_node_entry(dev);
1492                         kfd_release_topology_device(dev);
1493                         sys_props.num_devices--;
1494                         res = 0;
1495                         if (kfd_topology_update_sysfs() < 0)
1496                                 kfd_topology_release_sysfs();
1497                         break;
1498                 }
1499
1500         up_write(&topology_lock);
1501
1502         if (!res)
1503                 kfd_notify_gpu_change(gpu_id, 0);
1504
1505         return res;
1506 }
1507
1508 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
1509  *      topology. If GPU device is found @idx, then valid kfd_dev pointer is
1510  *      returned through @kdev
1511  * Return -     0: On success (@kdev will be NULL for non GPU nodes)
1512  *              -1: If end of list
1513  */
1514 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
1515 {
1516
1517         struct kfd_topology_device *top_dev;
1518         uint8_t device_idx = 0;
1519
1520         *kdev = NULL;
1521         down_read(&topology_lock);
1522
1523         list_for_each_entry(top_dev, &topology_device_list, list) {
1524                 if (device_idx == idx) {
1525                         *kdev = top_dev->gpu;
1526                         up_read(&topology_lock);
1527                         return 0;
1528                 }
1529
1530                 device_idx++;
1531         }
1532
1533         up_read(&topology_lock);
1534
1535         return -1;
1536
1537 }
1538
1539 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
1540 {
1541         int first_cpu_of_numa_node;
1542
1543         if (!cpumask || cpumask == cpu_none_mask)
1544                 return -1;
1545         first_cpu_of_numa_node = cpumask_first(cpumask);
1546         if (first_cpu_of_numa_node >= nr_cpu_ids)
1547                 return -1;
1548 #ifdef CONFIG_X86_64
1549         return cpu_data(first_cpu_of_numa_node).apicid;
1550 #else
1551         return first_cpu_of_numa_node;
1552 #endif
1553 }
1554
1555 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
1556  *      of the given NUMA node (numa_node_id)
1557  * Return -1 on failure
1558  */
1559 int kfd_numa_node_to_apic_id(int numa_node_id)
1560 {
1561         if (numa_node_id == -1) {
1562                 pr_warn("Invalid NUMA Node. Use online CPU mask\n");
1563                 return kfd_cpumask_to_apic_id(cpu_online_mask);
1564         }
1565         return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
1566 }
1567
1568 void kfd_double_confirm_iommu_support(struct kfd_dev *gpu)
1569 {
1570         struct kfd_topology_device *dev;
1571
1572         gpu->use_iommu_v2 = false;
1573
1574         if (!gpu->device_info->needs_iommu_device)
1575                 return;
1576
1577         down_read(&topology_lock);
1578
1579         /* Only use IOMMUv2 if there is an APU topology node with no GPU
1580          * assigned yet. This GPU will be assigned to it.
1581          */
1582         list_for_each_entry(dev, &topology_device_list, list)
1583                 if (dev->node_props.cpu_cores_count &&
1584                     dev->node_props.simd_count &&
1585                     !dev->gpu)
1586                         gpu->use_iommu_v2 = true;
1587
1588         up_read(&topology_lock);
1589 }
1590
1591 #if defined(CONFIG_DEBUG_FS)
1592
1593 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
1594 {
1595         struct kfd_topology_device *dev;
1596         unsigned int i = 0;
1597         int r = 0;
1598
1599         down_read(&topology_lock);
1600
1601         list_for_each_entry(dev, &topology_device_list, list) {
1602                 if (!dev->gpu) {
1603                         i++;
1604                         continue;
1605                 }
1606
1607                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1608                 r = dqm_debugfs_hqds(m, dev->gpu->dqm);
1609                 if (r)
1610                         break;
1611         }
1612
1613         up_read(&topology_lock);
1614
1615         return r;
1616 }
1617
1618 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
1619 {
1620         struct kfd_topology_device *dev;
1621         unsigned int i = 0;
1622         int r = 0;
1623
1624         down_read(&topology_lock);
1625
1626         list_for_each_entry(dev, &topology_device_list, list) {
1627                 if (!dev->gpu) {
1628                         i++;
1629                         continue;
1630                 }
1631
1632                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1633                 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packets);
1634                 if (r)
1635                         break;
1636         }
1637
1638         up_read(&topology_lock);
1639
1640         return r;
1641 }
1642
1643 #endif