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

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /*
   3  * Copyright 2014-2022 Advanced Micro Devices, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <linux/types.h>
  25 #include <linux/kernel.h>
  26 #include <linux/pci.h>
  27 #include <linux/errno.h>
  28 #include <linux/acpi.h>
  29 #include <linux/hash.h>
  30 #include <linux/cpufreq.h>
  31 #include <linux/log2.h>
  32 #include <linux/dmi.h>
  33 #include <linux/atomic.h>
  34
  35 #include "kfd_priv.h"
  36 #include "kfd_crat.h"
  37 #include "kfd_topology.h"
  38 #include "kfd_device_queue_manager.h"
  39 #include "kfd_iommu.h"
  40 #include "kfd_svm.h"
  41 #include "amdgpu_amdkfd.h"
  42 #include "amdgpu_ras.h"
  43 #include "amdgpu.h"
  44
  45 /* topology_device_list - Master list of all topology devices */
  46 static struct list_head topology_device_list;
  47 static struct kfd_system_properties sys_props;
  48
  49 static DECLARE_RWSEM(topology_lock);
  50 static uint32_t topology_crat_proximity_domain;
  51
  52 struct kfd_topology_device *kfd_topology_device_by_proximity_domain_no_lock(
  53                                                 uint32_t proximity_domain)
  54 {
  55         struct kfd_topology_device *top_dev;
  56         struct kfd_topology_device *device = NULL;
  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         return device;
  65 }
  66
  67 struct kfd_topology_device *kfd_topology_device_by_proximity_domain(
  68                                                 uint32_t proximity_domain)
  69 {
  70         struct kfd_topology_device *device = NULL;
  71
  72         down_read(&topology_lock);
  73
  74         device = kfd_topology_device_by_proximity_domain_no_lock(
  75                                                         proximity_domain);
  76         up_read(&topology_lock);
  77
  78         return device;
  79 }
  80
  81 struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
  82 {
  83         struct kfd_topology_device *top_dev = NULL;
  84         struct kfd_topology_device *ret = NULL;
  85
  86         down_read(&topology_lock);
  87
  88         list_for_each_entry(top_dev, &topology_device_list, list)
  89                 if (top_dev->gpu_id == gpu_id) {
  90                         ret = top_dev;
  91                         break;
  92                 }
  93
  94         up_read(&topology_lock);
  95
  96         return ret;
  97 }
  98
  99 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
 100 {
 101         struct kfd_topology_device *top_dev;
 102
 103         top_dev = kfd_topology_device_by_id(gpu_id);
 104         if (!top_dev)
 105                 return NULL;
 106
 107         return top_dev->gpu;
 108 }
 109
 110 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
 111 {
 112         struct kfd_topology_device *top_dev;
 113         struct kfd_dev *device = NULL;
 114
 115         down_read(&topology_lock);
 116
 117         list_for_each_entry(top_dev, &topology_device_list, list)
 118                 if (top_dev->gpu && top_dev->gpu->pdev == pdev) {
 119                         device = top_dev->gpu;
 120                         break;
 121                 }
 122
 123         up_read(&topology_lock);
 124
 125         return device;
 126 }
 127
 128 struct kfd_dev *kfd_device_by_adev(const struct amdgpu_device *adev)
 129 {
 130         struct kfd_topology_device *top_dev;
 131         struct kfd_dev *device = NULL;
 132
 133         down_read(&topology_lock);
 134
 135         list_for_each_entry(top_dev, &topology_device_list, list)
 136                 if (top_dev->gpu && top_dev->gpu->adev == adev) {
 137                         device = top_dev->gpu;
 138                         break;
 139                 }
 140
 141         up_read(&topology_lock);
 142
 143         return device;
 144 }
 145
 146 /* Called with write topology_lock acquired */
 147 static void kfd_release_topology_device(struct kfd_topology_device *dev)
 148 {
 149         struct kfd_mem_properties *mem;
 150         struct kfd_cache_properties *cache;
 151         struct kfd_iolink_properties *iolink;
 152         struct kfd_iolink_properties *p2plink;
 153         struct kfd_perf_properties *perf;
 154
 155         list_del(&dev->list);
 156
 157         while (dev->mem_props.next != &dev->mem_props) {
 158                 mem = container_of(dev->mem_props.next,
 159                                 struct kfd_mem_properties, list);
 160                 list_del(&mem->list);
 161                 kfree(mem);
 162         }
 163
 164         while (dev->cache_props.next != &dev->cache_props) {
 165                 cache = container_of(dev->cache_props.next,
 166                                 struct kfd_cache_properties, list);
 167                 list_del(&cache->list);
 168                 kfree(cache);
 169         }
 170
 171         while (dev->io_link_props.next != &dev->io_link_props) {
 172                 iolink = container_of(dev->io_link_props.next,
 173                                 struct kfd_iolink_properties, list);
 174                 list_del(&iolink->list);
 175                 kfree(iolink);
 176         }
 177
 178         while (dev->p2p_link_props.next != &dev->p2p_link_props) {
 179                 p2plink = container_of(dev->p2p_link_props.next,
 180                                 struct kfd_iolink_properties, list);
 181                 list_del(&p2plink->list);
 182                 kfree(p2plink);
 183         }
 184
 185         while (dev->perf_props.next != &dev->perf_props) {
 186                 perf = container_of(dev->perf_props.next,
 187                                 struct kfd_perf_properties, list);
 188                 list_del(&perf->list);
 189                 kfree(perf);
 190         }
 191
 192         kfree(dev);
 193 }
 194
 195 void kfd_release_topology_device_list(struct list_head *device_list)
 196 {
 197         struct kfd_topology_device *dev;
 198
 199         while (!list_empty(device_list)) {
 200                 dev = list_first_entry(device_list,
 201                                        struct kfd_topology_device, list);
 202                 kfd_release_topology_device(dev);
 203         }
 204 }
 205
 206 static void kfd_release_live_view(void)
 207 {
 208         kfd_release_topology_device_list(&topology_device_list);
 209         memset(&sys_props, 0, sizeof(sys_props));
 210 }
 211
 212 struct kfd_topology_device *kfd_create_topology_device(
 213                                 struct list_head *device_list)
 214 {
 215         struct kfd_topology_device *dev;
 216
 217         dev = kfd_alloc_struct(dev);
 218         if (!dev) {
 219                 pr_err("No memory to allocate a topology device");
 220                 return NULL;
 221         }
 222
 223         INIT_LIST_HEAD(&dev->mem_props);
 224         INIT_LIST_HEAD(&dev->cache_props);
 225         INIT_LIST_HEAD(&dev->io_link_props);
 226         INIT_LIST_HEAD(&dev->p2p_link_props);
 227         INIT_LIST_HEAD(&dev->perf_props);
 228
 229         list_add_tail(&dev->list, device_list);
 230
 231         return dev;
 232 }
 233
 234
 235 #define sysfs_show_gen_prop(buffer, offs, fmt, ...)             \
 236                 (offs += snprintf(buffer+offs, PAGE_SIZE-offs,  \
 237                                   fmt, __VA_ARGS__))
 238 #define sysfs_show_32bit_prop(buffer, offs, name, value) \
 239                 sysfs_show_gen_prop(buffer, offs, "%s %u\n", name, value)
 240 #define sysfs_show_64bit_prop(buffer, offs, name, value) \
 241                 sysfs_show_gen_prop(buffer, offs, "%s %llu\n", name, value)
 242 #define sysfs_show_32bit_val(buffer, offs, value) \
 243                 sysfs_show_gen_prop(buffer, offs, "%u\n", value)
 244 #define sysfs_show_str_val(buffer, offs, value) \
 245                 sysfs_show_gen_prop(buffer, offs, "%s\n", value)
 246
 247 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
 248                 char *buffer)
 249 {
 250         int offs = 0;
 251
 252         /* Making sure that the buffer is an empty string */
 253         buffer[0] = 0;
 254
 255         if (attr == &sys_props.attr_genid) {
 256                 sysfs_show_32bit_val(buffer, offs,
 257                                      sys_props.generation_count);
 258         } else if (attr == &sys_props.attr_props) {
 259                 sysfs_show_64bit_prop(buffer, offs, "platform_oem",
 260                                       sys_props.platform_oem);
 261                 sysfs_show_64bit_prop(buffer, offs, "platform_id",
 262                                       sys_props.platform_id);
 263                 sysfs_show_64bit_prop(buffer, offs, "platform_rev",
 264                                       sys_props.platform_rev);
 265         } else {
 266                 offs = -EINVAL;
 267         }
 268
 269         return offs;
 270 }
 271
 272 static void kfd_topology_kobj_release(struct kobject *kobj)
 273 {
 274         kfree(kobj);
 275 }
 276
 277 static const struct sysfs_ops sysprops_ops = {
 278         .show = sysprops_show,
 279 };
 280
 281 static struct kobj_type sysprops_type = {
 282         .release = kfd_topology_kobj_release,
 283         .sysfs_ops = &sysprops_ops,
 284 };
 285
 286 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
 287                 char *buffer)
 288 {
 289         int offs = 0;
 290         struct kfd_iolink_properties *iolink;
 291
 292         /* Making sure that the buffer is an empty string */
 293         buffer[0] = 0;
 294
 295         iolink = container_of(attr, struct kfd_iolink_properties, attr);
 296         if (iolink->gpu && kfd_devcgroup_check_permission(iolink->gpu))
 297                 return -EPERM;
 298         sysfs_show_32bit_prop(buffer, offs, "type", iolink->iolink_type);
 299         sysfs_show_32bit_prop(buffer, offs, "version_major", iolink->ver_maj);
 300         sysfs_show_32bit_prop(buffer, offs, "version_minor", iolink->ver_min);
 301         sysfs_show_32bit_prop(buffer, offs, "node_from", iolink->node_from);
 302         sysfs_show_32bit_prop(buffer, offs, "node_to", iolink->node_to);
 303         sysfs_show_32bit_prop(buffer, offs, "weight", iolink->weight);
 304         sysfs_show_32bit_prop(buffer, offs, "min_latency", iolink->min_latency);
 305         sysfs_show_32bit_prop(buffer, offs, "max_latency", iolink->max_latency);
 306         sysfs_show_32bit_prop(buffer, offs, "min_bandwidth",
 307                               iolink->min_bandwidth);
 308         sysfs_show_32bit_prop(buffer, offs, "max_bandwidth",
 309                               iolink->max_bandwidth);
 310         sysfs_show_32bit_prop(buffer, offs, "recommended_transfer_size",
 311                               iolink->rec_transfer_size);
 312         sysfs_show_32bit_prop(buffer, offs, "flags", iolink->flags);
 313
 314         return offs;
 315 }
 316
 317 static const struct sysfs_ops iolink_ops = {
 318         .show = iolink_show,
 319 };
 320
 321 static struct kobj_type iolink_type = {
 322         .release = kfd_topology_kobj_release,
 323         .sysfs_ops = &iolink_ops,
 324 };
 325
 326 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
 327                 char *buffer)
 328 {
 329         int offs = 0;
 330         struct kfd_mem_properties *mem;
 331
 332         /* Making sure that the buffer is an empty string */
 333         buffer[0] = 0;
 334
 335         mem = container_of(attr, struct kfd_mem_properties, attr);
 336         if (mem->gpu && kfd_devcgroup_check_permission(mem->gpu))
 337                 return -EPERM;
 338         sysfs_show_32bit_prop(buffer, offs, "heap_type", mem->heap_type);
 339         sysfs_show_64bit_prop(buffer, offs, "size_in_bytes",
 340                               mem->size_in_bytes);
 341         sysfs_show_32bit_prop(buffer, offs, "flags", mem->flags);
 342         sysfs_show_32bit_prop(buffer, offs, "width", mem->width);
 343         sysfs_show_32bit_prop(buffer, offs, "mem_clk_max",
 344                               mem->mem_clk_max);
 345
 346         return offs;
 347 }
 348
 349 static const struct sysfs_ops mem_ops = {
 350         .show = mem_show,
 351 };
 352
 353 static struct kobj_type mem_type = {
 354         .release = kfd_topology_kobj_release,
 355         .sysfs_ops = &mem_ops,
 356 };
 357
 358 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
 359                 char *buffer)
 360 {
 361         int offs = 0;
 362         uint32_t i, j;
 363         struct kfd_cache_properties *cache;
 364
 365         /* Making sure that the buffer is an empty string */
 366         buffer[0] = 0;
 367
 368         cache = container_of(attr, struct kfd_cache_properties, attr);
 369         if (cache->gpu && kfd_devcgroup_check_permission(cache->gpu))
 370                 return -EPERM;
 371         sysfs_show_32bit_prop(buffer, offs, "processor_id_low",
 372                         cache->processor_id_low);
 373         sysfs_show_32bit_prop(buffer, offs, "level", cache->cache_level);
 374         sysfs_show_32bit_prop(buffer, offs, "size", cache->cache_size);
 375         sysfs_show_32bit_prop(buffer, offs, "cache_line_size",
 376                               cache->cacheline_size);
 377         sysfs_show_32bit_prop(buffer, offs, "cache_lines_per_tag",
 378                               cache->cachelines_per_tag);
 379         sysfs_show_32bit_prop(buffer, offs, "association", cache->cache_assoc);
 380         sysfs_show_32bit_prop(buffer, offs, "latency", cache->cache_latency);
 381         sysfs_show_32bit_prop(buffer, offs, "type", cache->cache_type);
 382         offs += snprintf(buffer+offs, PAGE_SIZE-offs, "sibling_map ");
 383         for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++)
 384                 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++)
 385                         /* Check each bit */
 386                         offs += snprintf(buffer+offs, PAGE_SIZE-offs, "%d,",
 387                                          (cache->sibling_map[i] >> j) & 1);
 388
 389         /* Replace the last "," with end of line */
 390         buffer[offs-1] = '\n';
 391         return offs;
 392 }
 393
 394 static const struct sysfs_ops cache_ops = {
 395         .show = kfd_cache_show,
 396 };
 397
 398 static struct kobj_type cache_type = {
 399         .release = kfd_topology_kobj_release,
 400         .sysfs_ops = &cache_ops,
 401 };
 402
 403 /****** Sysfs of Performance Counters ******/
 404
 405 struct kfd_perf_attr {
 406         struct kobj_attribute attr;
 407         uint32_t data;
 408 };
 409
 410 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
 411                         char *buf)
 412 {
 413         int offs = 0;
 414         struct kfd_perf_attr *attr;
 415
 416         buf[0] = 0;
 417         attr = container_of(attrs, struct kfd_perf_attr, attr);
 418         if (!attr->data) /* invalid data for PMC */
 419                 return 0;
 420         else
 421                 return sysfs_show_32bit_val(buf, offs, attr->data);
 422 }
 423
 424 #define KFD_PERF_DESC(_name, _data)                     \
 425 {                                                       \
 426         .attr  = __ATTR(_name, 0444, perf_show, NULL),  \
 427         .data = _data,                                  \
 428 }
 429
 430 static struct kfd_perf_attr perf_attr_iommu[] = {
 431         KFD_PERF_DESC(max_concurrent, 0),
 432         KFD_PERF_DESC(num_counters, 0),
 433         KFD_PERF_DESC(counter_ids, 0),
 434 };
 435 /****************************************/
 436
 437 static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
 438                 char *buffer)
 439 {
 440         int offs = 0;
 441         struct kfd_topology_device *dev;
 442         uint32_t log_max_watch_addr;
 443
 444         /* Making sure that the buffer is an empty string */
 445         buffer[0] = 0;
 446
 447         if (strcmp(attr->name, "gpu_id") == 0) {
 448                 dev = container_of(attr, struct kfd_topology_device,
 449                                 attr_gpuid);
 450                 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 451                         return -EPERM;
 452                 return sysfs_show_32bit_val(buffer, offs, dev->gpu_id);
 453         }
 454
 455         if (strcmp(attr->name, "name") == 0) {
 456                 dev = container_of(attr, struct kfd_topology_device,
 457                                 attr_name);
 458
 459                 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 460                         return -EPERM;
 461                 return sysfs_show_str_val(buffer, offs, dev->node_props.name);
 462         }
 463
 464         dev = container_of(attr, struct kfd_topology_device,
 465                         attr_props);
 466         if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 467                 return -EPERM;
 468         sysfs_show_32bit_prop(buffer, offs, "cpu_cores_count",
 469                               dev->node_props.cpu_cores_count);
 470         sysfs_show_32bit_prop(buffer, offs, "simd_count",
 471                               dev->gpu ? dev->node_props.simd_count : 0);
 472         sysfs_show_32bit_prop(buffer, offs, "mem_banks_count",
 473                               dev->node_props.mem_banks_count);
 474         sysfs_show_32bit_prop(buffer, offs, "caches_count",
 475                               dev->node_props.caches_count);
 476         sysfs_show_32bit_prop(buffer, offs, "io_links_count",
 477                               dev->node_props.io_links_count);
 478         sysfs_show_32bit_prop(buffer, offs, "p2p_links_count",
 479                               dev->node_props.p2p_links_count);
 480         sysfs_show_32bit_prop(buffer, offs, "cpu_core_id_base",
 481                               dev->node_props.cpu_core_id_base);
 482         sysfs_show_32bit_prop(buffer, offs, "simd_id_base",
 483                               dev->node_props.simd_id_base);
 484         sysfs_show_32bit_prop(buffer, offs, "max_waves_per_simd",
 485                               dev->node_props.max_waves_per_simd);
 486         sysfs_show_32bit_prop(buffer, offs, "lds_size_in_kb",
 487                               dev->node_props.lds_size_in_kb);
 488         sysfs_show_32bit_prop(buffer, offs, "gds_size_in_kb",
 489                               dev->node_props.gds_size_in_kb);
 490         sysfs_show_32bit_prop(buffer, offs, "num_gws",
 491                               dev->node_props.num_gws);
 492         sysfs_show_32bit_prop(buffer, offs, "wave_front_size",
 493                               dev->node_props.wave_front_size);
 494         sysfs_show_32bit_prop(buffer, offs, "array_count",
 495                               dev->node_props.array_count);
 496         sysfs_show_32bit_prop(buffer, offs, "simd_arrays_per_engine",
 497                               dev->node_props.simd_arrays_per_engine);
 498         sysfs_show_32bit_prop(buffer, offs, "cu_per_simd_array",
 499                               dev->node_props.cu_per_simd_array);
 500         sysfs_show_32bit_prop(buffer, offs, "simd_per_cu",
 501                               dev->node_props.simd_per_cu);
 502         sysfs_show_32bit_prop(buffer, offs, "max_slots_scratch_cu",
 503                               dev->node_props.max_slots_scratch_cu);
 504         sysfs_show_32bit_prop(buffer, offs, "gfx_target_version",
 505                               dev->node_props.gfx_target_version);
 506         sysfs_show_32bit_prop(buffer, offs, "vendor_id",
 507                               dev->node_props.vendor_id);
 508         sysfs_show_32bit_prop(buffer, offs, "device_id",
 509                               dev->node_props.device_id);
 510         sysfs_show_32bit_prop(buffer, offs, "location_id",
 511                               dev->node_props.location_id);
 512         sysfs_show_32bit_prop(buffer, offs, "domain",
 513                               dev->node_props.domain);
 514         sysfs_show_32bit_prop(buffer, offs, "drm_render_minor",
 515                               dev->node_props.drm_render_minor);
 516         sysfs_show_64bit_prop(buffer, offs, "hive_id",
 517                               dev->node_props.hive_id);
 518         sysfs_show_32bit_prop(buffer, offs, "num_sdma_engines",
 519                               dev->node_props.num_sdma_engines);
 520         sysfs_show_32bit_prop(buffer, offs, "num_sdma_xgmi_engines",
 521                               dev->node_props.num_sdma_xgmi_engines);
 522         sysfs_show_32bit_prop(buffer, offs, "num_sdma_queues_per_engine",
 523                               dev->node_props.num_sdma_queues_per_engine);
 524         sysfs_show_32bit_prop(buffer, offs, "num_cp_queues",
 525                               dev->node_props.num_cp_queues);
 526
 527         if (dev->gpu) {
 528                 log_max_watch_addr =
 529                         __ilog2_u32(dev->gpu->device_info.num_of_watch_points);
 530
 531                 if (log_max_watch_addr) {
 532                         dev->node_props.capability |=
 533                                         HSA_CAP_WATCH_POINTS_SUPPORTED;
 534
 535                         dev->node_props.capability |=
 536                                 ((log_max_watch_addr <<
 537                                         HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
 538                                 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
 539                 }
 540
 541                 if (dev->gpu->adev->asic_type == CHIP_TONGA)
 542                         dev->node_props.capability |=
 543                                         HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
 544
 545                 sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_fcompute",
 546                         dev->node_props.max_engine_clk_fcompute);
 547
 548                 sysfs_show_64bit_prop(buffer, offs, "local_mem_size", 0ULL);
 549
 550                 sysfs_show_32bit_prop(buffer, offs, "fw_version",
 551                                       dev->gpu->mec_fw_version);
 552                 sysfs_show_32bit_prop(buffer, offs, "capability",
 553                                       dev->node_props.capability);
 554                 sysfs_show_32bit_prop(buffer, offs, "sdma_fw_version",
 555                                       dev->gpu->sdma_fw_version);
 556                 sysfs_show_64bit_prop(buffer, offs, "unique_id",
 557                                       dev->gpu->adev->unique_id);
 558
 559         }
 560
 561         return sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_ccompute",
 562                                      cpufreq_quick_get_max(0)/1000);
 563 }
 564
 565 static const struct sysfs_ops node_ops = {
 566         .show = node_show,
 567 };
 568
 569 static struct kobj_type node_type = {
 570         .release = kfd_topology_kobj_release,
 571         .sysfs_ops = &node_ops,
 572 };
 573
 574 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
 575 {
 576         sysfs_remove_file(kobj, attr);
 577         kobject_del(kobj);
 578         kobject_put(kobj);
 579 }
 580
 581 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
 582 {
 583         struct kfd_iolink_properties *p2plink;
 584         struct kfd_iolink_properties *iolink;
 585         struct kfd_cache_properties *cache;
 586         struct kfd_mem_properties *mem;
 587         struct kfd_perf_properties *perf;
 588
 589         if (dev->kobj_iolink) {
 590                 list_for_each_entry(iolink, &dev->io_link_props, list)
 591                         if (iolink->kobj) {
 592                                 kfd_remove_sysfs_file(iolink->kobj,
 593                                                         &iolink->attr);
 594                                 iolink->kobj = NULL;
 595                         }
 596                 kobject_del(dev->kobj_iolink);
 597                 kobject_put(dev->kobj_iolink);
 598                 dev->kobj_iolink = NULL;
 599         }
 600
 601         if (dev->kobj_p2plink) {
 602                 list_for_each_entry(p2plink, &dev->p2p_link_props, list)
 603                         if (p2plink->kobj) {
 604                                 kfd_remove_sysfs_file(p2plink->kobj,
 605                                                         &p2plink->attr);
 606                                 p2plink->kobj = NULL;
 607                         }
 608                 kobject_del(dev->kobj_p2plink);
 609                 kobject_put(dev->kobj_p2plink);
 610                 dev->kobj_p2plink = NULL;
 611         }
 612
 613         if (dev->kobj_cache) {
 614                 list_for_each_entry(cache, &dev->cache_props, list)
 615                         if (cache->kobj) {
 616                                 kfd_remove_sysfs_file(cache->kobj,
 617                                                         &cache->attr);
 618                                 cache->kobj = NULL;
 619                         }
 620                 kobject_del(dev->kobj_cache);
 621                 kobject_put(dev->kobj_cache);
 622                 dev->kobj_cache = NULL;
 623         }
 624
 625         if (dev->kobj_mem) {
 626                 list_for_each_entry(mem, &dev->mem_props, list)
 627                         if (mem->kobj) {
 628                                 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
 629                                 mem->kobj = NULL;
 630                         }
 631                 kobject_del(dev->kobj_mem);
 632                 kobject_put(dev->kobj_mem);
 633                 dev->kobj_mem = NULL;
 634         }
 635
 636         if (dev->kobj_perf) {
 637                 list_for_each_entry(perf, &dev->perf_props, list) {
 638                         kfree(perf->attr_group);
 639                         perf->attr_group = NULL;
 640                 }
 641                 kobject_del(dev->kobj_perf);
 642                 kobject_put(dev->kobj_perf);
 643                 dev->kobj_perf = NULL;
 644         }
 645
 646         if (dev->kobj_node) {
 647                 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
 648                 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
 649                 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
 650                 kobject_del(dev->kobj_node);
 651                 kobject_put(dev->kobj_node);
 652                 dev->kobj_node = NULL;
 653         }
 654 }
 655
 656 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
 657                 uint32_t id)
 658 {
 659         struct kfd_iolink_properties *p2plink;
 660         struct kfd_iolink_properties *iolink;
 661         struct kfd_cache_properties *cache;
 662         struct kfd_mem_properties *mem;
 663         struct kfd_perf_properties *perf;
 664         int ret;
 665         uint32_t i, num_attrs;
 666         struct attribute **attrs;
 667
 668         if (WARN_ON(dev->kobj_node))
 669                 return -EEXIST;
 670
 671         /*
 672          * Creating the sysfs folders
 673          */
 674         dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
 675         if (!dev->kobj_node)
 676                 return -ENOMEM;
 677
 678         ret = kobject_init_and_add(dev->kobj_node, &node_type,
 679                         sys_props.kobj_nodes, "%d", id);
 680         if (ret < 0) {
 681                 kobject_put(dev->kobj_node);
 682                 return ret;
 683         }
 684
 685         dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
 686         if (!dev->kobj_mem)
 687                 return -ENOMEM;
 688
 689         dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
 690         if (!dev->kobj_cache)
 691                 return -ENOMEM;
 692
 693         dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
 694         if (!dev->kobj_iolink)
 695                 return -ENOMEM;
 696
 697         dev->kobj_p2plink = kobject_create_and_add("p2p_links", dev->kobj_node);
 698         if (!dev->kobj_p2plink)
 699                 return -ENOMEM;
 700
 701         dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
 702         if (!dev->kobj_perf)
 703                 return -ENOMEM;
 704
 705         /*
 706          * Creating sysfs files for node properties
 707          */
 708         dev->attr_gpuid.name = "gpu_id";
 709         dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
 710         sysfs_attr_init(&dev->attr_gpuid);
 711         dev->attr_name.name = "name";
 712         dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
 713         sysfs_attr_init(&dev->attr_name);
 714         dev->attr_props.name = "properties";
 715         dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
 716         sysfs_attr_init(&dev->attr_props);
 717         ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
 718         if (ret < 0)
 719                 return ret;
 720         ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
 721         if (ret < 0)
 722                 return ret;
 723         ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
 724         if (ret < 0)
 725                 return ret;
 726
 727         i = 0;
 728         list_for_each_entry(mem, &dev->mem_props, list) {
 729                 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 730                 if (!mem->kobj)
 731                         return -ENOMEM;
 732                 ret = kobject_init_and_add(mem->kobj, &mem_type,
 733                                 dev->kobj_mem, "%d", i);
 734                 if (ret < 0) {
 735                         kobject_put(mem->kobj);
 736                         return ret;
 737                 }
 738
 739                 mem->attr.name = "properties";
 740                 mem->attr.mode = KFD_SYSFS_FILE_MODE;
 741                 sysfs_attr_init(&mem->attr);
 742                 ret = sysfs_create_file(mem->kobj, &mem->attr);
 743                 if (ret < 0)
 744                         return ret;
 745                 i++;
 746         }
 747
 748         i = 0;
 749         list_for_each_entry(cache, &dev->cache_props, list) {
 750                 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 751                 if (!cache->kobj)
 752                         return -ENOMEM;
 753                 ret = kobject_init_and_add(cache->kobj, &cache_type,
 754                                 dev->kobj_cache, "%d", i);
 755                 if (ret < 0) {
 756                         kobject_put(cache->kobj);
 757                         return ret;
 758                 }
 759
 760                 cache->attr.name = "properties";
 761                 cache->attr.mode = KFD_SYSFS_FILE_MODE;
 762                 sysfs_attr_init(&cache->attr);
 763                 ret = sysfs_create_file(cache->kobj, &cache->attr);
 764                 if (ret < 0)
 765                         return ret;
 766                 i++;
 767         }
 768
 769         i = 0;
 770         list_for_each_entry(iolink, &dev->io_link_props, list) {
 771                 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 772                 if (!iolink->kobj)
 773                         return -ENOMEM;
 774                 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
 775                                 dev->kobj_iolink, "%d", i);
 776                 if (ret < 0) {
 777                         kobject_put(iolink->kobj);
 778                         return ret;
 779                 }
 780
 781                 iolink->attr.name = "properties";
 782                 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
 783                 sysfs_attr_init(&iolink->attr);
 784                 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
 785                 if (ret < 0)
 786                         return ret;
 787                 i++;
 788         }
 789
 790         i = 0;
 791         list_for_each_entry(p2plink, &dev->p2p_link_props, list) {
 792                 p2plink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 793                 if (!p2plink->kobj)
 794                         return -ENOMEM;
 795                 ret = kobject_init_and_add(p2plink->kobj, &iolink_type,
 796                                 dev->kobj_p2plink, "%d", i);
 797                 if (ret < 0) {
 798                         kobject_put(p2plink->kobj);
 799                         return ret;
 800                 }
 801
 802                 p2plink->attr.name = "properties";
 803                 p2plink->attr.mode = KFD_SYSFS_FILE_MODE;
 804                 sysfs_attr_init(&iolink->attr);
 805                 ret = sysfs_create_file(p2plink->kobj, &p2plink->attr);
 806                 if (ret < 0)
 807                         return ret;
 808                 i++;
 809         }
 810
 811         /* All hardware blocks have the same number of attributes. */
 812         num_attrs = ARRAY_SIZE(perf_attr_iommu);
 813         list_for_each_entry(perf, &dev->perf_props, list) {
 814                 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
 815                         * num_attrs + sizeof(struct attribute_group),
 816                         GFP_KERNEL);
 817                 if (!perf->attr_group)
 818                         return -ENOMEM;
 819
 820                 attrs = (struct attribute **)(perf->attr_group + 1);
 821                 if (!strcmp(perf->block_name, "iommu")) {
 822                 /* Information of IOMMU's num_counters and counter_ids is shown
 823                  * under /sys/bus/event_source/devices/amd_iommu. We don't
 824                  * duplicate here.
 825                  */
 826                         perf_attr_iommu[0].data = perf->max_concurrent;
 827                         for (i = 0; i < num_attrs; i++)
 828                                 attrs[i] = &perf_attr_iommu[i].attr.attr;
 829                 }
 830                 perf->attr_group->name = perf->block_name;
 831                 perf->attr_group->attrs = attrs;
 832                 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
 833                 if (ret < 0)
 834                         return ret;
 835         }
 836
 837         return 0;
 838 }
 839
 840 /* Called with write topology lock acquired */
 841 static int kfd_build_sysfs_node_tree(void)
 842 {
 843         struct kfd_topology_device *dev;
 844         int ret;
 845         uint32_t i = 0;
 846
 847         list_for_each_entry(dev, &topology_device_list, list) {
 848                 ret = kfd_build_sysfs_node_entry(dev, i);
 849                 if (ret < 0)
 850                         return ret;
 851                 i++;
 852         }
 853
 854         return 0;
 855 }
 856
 857 /* Called with write topology lock acquired */
 858 static void kfd_remove_sysfs_node_tree(void)
 859 {
 860         struct kfd_topology_device *dev;
 861
 862         list_for_each_entry(dev, &topology_device_list, list)
 863                 kfd_remove_sysfs_node_entry(dev);
 864 }
 865
 866 static int kfd_topology_update_sysfs(void)
 867 {
 868         int ret;
 869
 870         if (!sys_props.kobj_topology) {
 871                 sys_props.kobj_topology =
 872                                 kfd_alloc_struct(sys_props.kobj_topology);
 873                 if (!sys_props.kobj_topology)
 874                         return -ENOMEM;
 875
 876                 ret = kobject_init_and_add(sys_props.kobj_topology,
 877                                 &sysprops_type,  &kfd_device->kobj,
 878                                 "topology");
 879                 if (ret < 0) {
 880                         kobject_put(sys_props.kobj_topology);
 881                         return ret;
 882                 }
 883
 884                 sys_props.kobj_nodes = kobject_create_and_add("nodes",
 885                                 sys_props.kobj_topology);
 886                 if (!sys_props.kobj_nodes)
 887                         return -ENOMEM;
 888
 889                 sys_props.attr_genid.name = "generation_id";
 890                 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
 891                 sysfs_attr_init(&sys_props.attr_genid);
 892                 ret = sysfs_create_file(sys_props.kobj_topology,
 893                                 &sys_props.attr_genid);
 894                 if (ret < 0)
 895                         return ret;
 896
 897                 sys_props.attr_props.name = "system_properties";
 898                 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
 899                 sysfs_attr_init(&sys_props.attr_props);
 900                 ret = sysfs_create_file(sys_props.kobj_topology,
 901                                 &sys_props.attr_props);
 902                 if (ret < 0)
 903                         return ret;
 904         }
 905
 906         kfd_remove_sysfs_node_tree();
 907
 908         return kfd_build_sysfs_node_tree();
 909 }
 910
 911 static void kfd_topology_release_sysfs(void)
 912 {
 913         kfd_remove_sysfs_node_tree();
 914         if (sys_props.kobj_topology) {
 915                 sysfs_remove_file(sys_props.kobj_topology,
 916                                 &sys_props.attr_genid);
 917                 sysfs_remove_file(sys_props.kobj_topology,
 918                                 &sys_props.attr_props);
 919                 if (sys_props.kobj_nodes) {
 920                         kobject_del(sys_props.kobj_nodes);
 921                         kobject_put(sys_props.kobj_nodes);
 922                         sys_props.kobj_nodes = NULL;
 923                 }
 924                 kobject_del(sys_props.kobj_topology);
 925                 kobject_put(sys_props.kobj_topology);
 926                 sys_props.kobj_topology = NULL;
 927         }
 928 }
 929
 930 /* Called with write topology_lock acquired */
 931 static void kfd_topology_update_device_list(struct list_head *temp_list,
 932                                         struct list_head *master_list)
 933 {
 934         while (!list_empty(temp_list)) {
 935                 list_move_tail(temp_list->next, master_list);
 936                 sys_props.num_devices++;
 937         }
 938 }
 939
 940 static void kfd_debug_print_topology(void)
 941 {
 942         struct kfd_topology_device *dev;
 943
 944         down_read(&topology_lock);
 945
 946         dev = list_last_entry(&topology_device_list,
 947                         struct kfd_topology_device, list);
 948         if (dev) {
 949                 if (dev->node_props.cpu_cores_count &&
 950                                 dev->node_props.simd_count) {
 951                         pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
 952                                 dev->node_props.device_id,
 953                                 dev->node_props.vendor_id);
 954                 } else if (dev->node_props.cpu_cores_count)
 955                         pr_info("Topology: Add CPU node\n");
 956                 else if (dev->node_props.simd_count)
 957                         pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
 958                                 dev->node_props.device_id,
 959                                 dev->node_props.vendor_id);
 960         }
 961         up_read(&topology_lock);
 962 }
 963
 964 /* Helper function for intializing platform_xx members of
 965  * kfd_system_properties. Uses OEM info from the last CPU/APU node.
 966  */
 967 static void kfd_update_system_properties(void)
 968 {
 969         struct kfd_topology_device *dev;
 970
 971         down_read(&topology_lock);
 972         dev = list_last_entry(&topology_device_list,
 973                         struct kfd_topology_device, list);
 974         if (dev) {
 975                 sys_props.platform_id =
 976                         (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
 977                 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
 978                 sys_props.platform_rev = dev->oem_revision;
 979         }
 980         up_read(&topology_lock);
 981 }
 982
 983 static void find_system_memory(const struct dmi_header *dm,
 984         void *private)
 985 {
 986         struct kfd_mem_properties *mem;
 987         u16 mem_width, mem_clock;
 988         struct kfd_topology_device *kdev =
 989                 (struct kfd_topology_device *)private;
 990         const u8 *dmi_data = (const u8 *)(dm + 1);
 991
 992         if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
 993                 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
 994                 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
 995                 list_for_each_entry(mem, &kdev->mem_props, list) {
 996                         if (mem_width != 0xFFFF && mem_width != 0)
 997                                 mem->width = mem_width;
 998                         if (mem_clock != 0)
 999                                 mem->mem_clk_max = mem_clock;
1000                 }
1001         }
1002 }
1003
1004 /*
1005  * Performance counters information is not part of CRAT but we would like to
1006  * put them in the sysfs under topology directory for Thunk to get the data.
1007  * This function is called before updating the sysfs.
1008  */
1009 static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev)
1010 {
1011         /* These are the only counters supported so far */
1012         return kfd_iommu_add_perf_counters(kdev);
1013 }
1014
1015 /* kfd_add_non_crat_information - Add information that is not currently
1016  *      defined in CRAT but is necessary for KFD topology
1017  * @dev - topology device to which addition info is added
1018  */
1019 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
1020 {
1021         /* Check if CPU only node. */
1022         if (!kdev->gpu) {
1023                 /* Add system memory information */
1024                 dmi_walk(find_system_memory, kdev);
1025         }
1026         /* TODO: For GPU node, rearrange code from kfd_topology_add_device */
1027 }
1028
1029 /* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices.
1030  *      Ignore CRAT for all other devices. AMD APU is identified if both CPU
1031  *      and GPU cores are present.
1032  * @device_list - topology device list created by parsing ACPI CRAT table.
1033  * @return - TRUE if invalid, FALSE is valid.
1034  */
1035 static bool kfd_is_acpi_crat_invalid(struct list_head *device_list)
1036 {
1037         struct kfd_topology_device *dev;
1038
1039         list_for_each_entry(dev, device_list, list) {
1040                 if (dev->node_props.cpu_cores_count &&
1041                         dev->node_props.simd_count)
1042                         return false;
1043         }
1044         pr_info("Ignoring ACPI CRAT on non-APU system\n");
1045         return true;
1046 }
1047
1048 int kfd_topology_init(void)
1049 {
1050         void *crat_image = NULL;
1051         size_t image_size = 0;
1052         int ret;
1053         struct list_head temp_topology_device_list;
1054         int cpu_only_node = 0;
1055         struct kfd_topology_device *kdev;
1056         int proximity_domain;
1057
1058         /* topology_device_list - Master list of all topology devices
1059          * temp_topology_device_list - temporary list created while parsing CRAT
1060          * or VCRAT. Once parsing is complete the contents of list is moved to
1061          * topology_device_list
1062          */
1063
1064         /* Initialize the head for the both the lists */
1065         INIT_LIST_HEAD(&topology_device_list);
1066         INIT_LIST_HEAD(&temp_topology_device_list);
1067         init_rwsem(&topology_lock);
1068
1069         memset(&sys_props, 0, sizeof(sys_props));
1070
1071         /* Proximity domains in ACPI CRAT tables start counting at
1072          * 0. The same should be true for virtual CRAT tables created
1073          * at this stage. GPUs added later in kfd_topology_add_device
1074          * use a counter.
1075          */
1076         proximity_domain = 0;
1077
1078         /*
1079          * Get the CRAT image from the ACPI. If ACPI doesn't have one
1080          * or if ACPI CRAT is invalid create a virtual CRAT.
1081          * NOTE: The current implementation expects all AMD APUs to have
1082          *      CRAT. If no CRAT is available, it is assumed to be a CPU
1083          */
1084         ret = kfd_create_crat_image_acpi(&crat_image, &image_size);
1085         if (!ret) {
1086                 ret = kfd_parse_crat_table(crat_image,
1087                                            &temp_topology_device_list,
1088                                            proximity_domain);
1089                 if (ret ||
1090                     kfd_is_acpi_crat_invalid(&temp_topology_device_list)) {
1091                         kfd_release_topology_device_list(
1092                                 &temp_topology_device_list);
1093                         kfd_destroy_crat_image(crat_image);
1094                         crat_image = NULL;
1095                 }
1096         }
1097
1098         if (!crat_image) {
1099                 ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
1100                                                     COMPUTE_UNIT_CPU, NULL,
1101                                                     proximity_domain);
1102                 cpu_only_node = 1;
1103                 if (ret) {
1104                         pr_err("Error creating VCRAT table for CPU\n");
1105                         return ret;
1106                 }
1107
1108                 ret = kfd_parse_crat_table(crat_image,
1109                                            &temp_topology_device_list,
1110                                            proximity_domain);
1111                 if (ret) {
1112                         pr_err("Error parsing VCRAT table for CPU\n");
1113                         goto err;
1114                 }
1115         }
1116
1117         kdev = list_first_entry(&temp_topology_device_list,
1118                                 struct kfd_topology_device, list);
1119         kfd_add_perf_to_topology(kdev);
1120
1121         down_write(&topology_lock);
1122         kfd_topology_update_device_list(&temp_topology_device_list,
1123                                         &topology_device_list);
1124         topology_crat_proximity_domain = sys_props.num_devices-1;
1125         ret = kfd_topology_update_sysfs();
1126         up_write(&topology_lock);
1127
1128         if (!ret) {
1129                 sys_props.generation_count++;
1130                 kfd_update_system_properties();
1131                 kfd_debug_print_topology();
1132         } else
1133                 pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1134
1135         /* For nodes with GPU, this information gets added
1136          * when GPU is detected (kfd_topology_add_device).
1137          */
1138         if (cpu_only_node) {
1139                 /* Add additional information to CPU only node created above */
1140                 down_write(&topology_lock);
1141                 kdev = list_first_entry(&topology_device_list,
1142                                 struct kfd_topology_device, list);
1143                 up_write(&topology_lock);
1144                 kfd_add_non_crat_information(kdev);
1145         }
1146
1147 err:
1148         kfd_destroy_crat_image(crat_image);
1149         return ret;
1150 }
1151
1152 void kfd_topology_shutdown(void)
1153 {
1154         down_write(&topology_lock);
1155         kfd_topology_release_sysfs();
1156         kfd_release_live_view();
1157         up_write(&topology_lock);
1158 }
1159
1160 static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1161 {
1162         uint32_t hashout;
1163         uint32_t buf[7];
1164         uint64_t local_mem_size;
1165         int i;
1166
1167         if (!gpu)
1168                 return 0;
1169
1170         local_mem_size = gpu->local_mem_info.local_mem_size_private +
1171                         gpu->local_mem_info.local_mem_size_public;
1172
1173         buf[0] = gpu->pdev->devfn;
1174         buf[1] = gpu->pdev->subsystem_vendor |
1175                 (gpu->pdev->subsystem_device << 16);
1176         buf[2] = pci_domain_nr(gpu->pdev->bus);
1177         buf[3] = gpu->pdev->device;
1178         buf[4] = gpu->pdev->bus->number;
1179         buf[5] = lower_32_bits(local_mem_size);
1180         buf[6] = upper_32_bits(local_mem_size);
1181
1182         for (i = 0, hashout = 0; i < 7; i++)
1183                 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1184
1185         return hashout;
1186 }
1187 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1188  *              the GPU device is not already present in the topology device
1189  *              list then return NULL. This means a new topology device has to
1190  *              be created for this GPU.
1191  */
1192 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1193 {
1194         struct kfd_topology_device *dev;
1195         struct kfd_topology_device *out_dev = NULL;
1196         struct kfd_mem_properties *mem;
1197         struct kfd_cache_properties *cache;
1198         struct kfd_iolink_properties *iolink;
1199         struct kfd_iolink_properties *p2plink;
1200
1201         down_write(&topology_lock);
1202         list_for_each_entry(dev, &topology_device_list, list) {
1203                 /* Discrete GPUs need their own topology device list
1204                  * entries. Don't assign them to CPU/APU nodes.
1205                  */
1206                 if (!gpu->use_iommu_v2 &&
1207                     dev->node_props.cpu_cores_count)
1208                         continue;
1209
1210                 if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1211                         dev->gpu = gpu;
1212                         out_dev = dev;
1213
1214                         list_for_each_entry(mem, &dev->mem_props, list)
1215                                 mem->gpu = dev->gpu;
1216                         list_for_each_entry(cache, &dev->cache_props, list)
1217                                 cache->gpu = dev->gpu;
1218                         list_for_each_entry(iolink, &dev->io_link_props, list)
1219                                 iolink->gpu = dev->gpu;
1220                         list_for_each_entry(p2plink, &dev->p2p_link_props, list)
1221                                 p2plink->gpu = dev->gpu;
1222                         break;
1223                 }
1224         }
1225         up_write(&topology_lock);
1226         return out_dev;
1227 }
1228
1229 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1230 {
1231         /*
1232          * TODO: Generate an event for thunk about the arrival/removal
1233          * of the GPU
1234          */
1235 }
1236
1237 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1238  *              patch this after CRAT parsing.
1239  */
1240 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1241 {
1242         struct kfd_mem_properties *mem;
1243         struct kfd_local_mem_info local_mem_info;
1244
1245         if (!dev)
1246                 return;
1247
1248         /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1249          * single bank of VRAM local memory.
1250          * for dGPUs - VCRAT reports only one bank of Local Memory
1251          * for APUs - If CRAT from ACPI reports more than one bank, then
1252          *      all the banks will report the same mem_clk_max information
1253          */
1254         amdgpu_amdkfd_get_local_mem_info(dev->gpu->adev, &local_mem_info);
1255
1256         list_for_each_entry(mem, &dev->mem_props, list)
1257                 mem->mem_clk_max = local_mem_info.mem_clk_max;
1258 }
1259
1260 static void kfd_set_iolink_no_atomics(struct kfd_topology_device *dev,
1261                                         struct kfd_topology_device *target_gpu_dev,
1262                                         struct kfd_iolink_properties *link)
1263 {
1264         /* xgmi always supports atomics between links. */
1265         if (link->iolink_type == CRAT_IOLINK_TYPE_XGMI)
1266                 return;
1267
1268         /* check pcie support to set cpu(dev) flags for target_gpu_dev link. */
1269         if (target_gpu_dev) {
1270                 uint32_t cap;
1271
1272                 pcie_capability_read_dword(target_gpu_dev->gpu->pdev,
1273                                 PCI_EXP_DEVCAP2, &cap);
1274
1275                 if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
1276                              PCI_EXP_DEVCAP2_ATOMIC_COMP64)))
1277                         link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1278                                 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1279         /* set gpu (dev) flags. */
1280         } else {
1281                 if (!dev->gpu->pci_atomic_requested ||
1282                                 dev->gpu->adev->asic_type == CHIP_HAWAII)
1283                         link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1284                                 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1285         }
1286 }
1287
1288 static void kfd_set_iolink_non_coherent(struct kfd_topology_device *to_dev,
1289                 struct kfd_iolink_properties *outbound_link,
1290                 struct kfd_iolink_properties *inbound_link)
1291 {
1292         /* CPU -> GPU with PCIe */
1293         if (!to_dev->gpu &&
1294             inbound_link->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS)
1295                 inbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1296
1297         if (to_dev->gpu) {
1298                 /* GPU <-> GPU with PCIe and
1299                  * Vega20 with XGMI
1300                  */
1301                 if (inbound_link->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS ||
1302                     (inbound_link->iolink_type == CRAT_IOLINK_TYPE_XGMI &&
1303                     KFD_GC_VERSION(to_dev->gpu) == IP_VERSION(9, 4, 0))) {
1304                         outbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1305                         inbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1306                 }
1307         }
1308 }
1309
1310 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1311 {
1312         struct kfd_iolink_properties *link, *inbound_link;
1313         struct kfd_topology_device *peer_dev;
1314
1315         if (!dev || !dev->gpu)
1316                 return;
1317
1318         /* GPU only creates direct links so apply flags setting to all */
1319         list_for_each_entry(link, &dev->io_link_props, list) {
1320                 link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1321                 kfd_set_iolink_no_atomics(dev, NULL, link);
1322                 peer_dev = kfd_topology_device_by_proximity_domain(
1323                                 link->node_to);
1324
1325                 if (!peer_dev)
1326                         continue;
1327
1328                 /* Include the CPU peer in GPU hive if connected over xGMI. */
1329                 if (!peer_dev->gpu && !peer_dev->node_props.hive_id &&
1330                                 dev->node_props.hive_id &&
1331                                 dev->gpu->adev->gmc.xgmi.connected_to_cpu)
1332                         peer_dev->node_props.hive_id = dev->node_props.hive_id;
1333
1334                 list_for_each_entry(inbound_link, &peer_dev->io_link_props,
1335                                                                         list) {
1336                         if (inbound_link->node_to != link->node_from)
1337                                 continue;
1338
1339                         inbound_link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1340                         kfd_set_iolink_no_atomics(peer_dev, dev, inbound_link);
1341                         kfd_set_iolink_non_coherent(peer_dev, link, inbound_link);
1342                 }
1343         }
1344
1345         /* Create indirect links so apply flags setting to all */
1346         list_for_each_entry(link, &dev->p2p_link_props, list) {
1347                 link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1348                 kfd_set_iolink_no_atomics(dev, NULL, link);
1349                 peer_dev = kfd_topology_device_by_proximity_domain(
1350                                 link->node_to);
1351
1352                 if (!peer_dev)
1353                         continue;
1354
1355                 list_for_each_entry(inbound_link, &peer_dev->p2p_link_props,
1356                                                                         list) {
1357                         if (inbound_link->node_to != link->node_from)
1358                                 continue;
1359
1360                         inbound_link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1361                         kfd_set_iolink_no_atomics(peer_dev, dev, inbound_link);
1362                         kfd_set_iolink_non_coherent(peer_dev, link, inbound_link);
1363                 }
1364         }
1365 }
1366
1367 static int kfd_build_p2p_node_entry(struct kfd_topology_device *dev,
1368                                 struct kfd_iolink_properties *p2plink)
1369 {
1370         int ret;
1371
1372         p2plink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
1373         if (!p2plink->kobj)
1374                 return -ENOMEM;
1375
1376         ret = kobject_init_and_add(p2plink->kobj, &iolink_type,
1377                         dev->kobj_p2plink, "%d", dev->node_props.p2p_links_count - 1);
1378         if (ret < 0) {
1379                 kobject_put(p2plink->kobj);
1380                 return ret;
1381         }
1382
1383         p2plink->attr.name = "properties";
1384         p2plink->attr.mode = KFD_SYSFS_FILE_MODE;
1385         sysfs_attr_init(&p2plink->attr);
1386         ret = sysfs_create_file(p2plink->kobj, &p2plink->attr);
1387         if (ret < 0)
1388                 return ret;
1389
1390         return 0;
1391 }
1392
1393 static int kfd_create_indirect_link_prop(struct kfd_topology_device *kdev, int gpu_node)
1394 {
1395         struct kfd_iolink_properties *props = NULL, *props2 = NULL;
1396         struct kfd_iolink_properties *gpu_link, *cpu_link;
1397         struct kfd_topology_device *cpu_dev;
1398         int ret = 0;
1399         int i, num_cpu;
1400
1401         num_cpu = 0;
1402         list_for_each_entry(cpu_dev, &topology_device_list, list) {
1403                 if (cpu_dev->gpu)
1404                         break;
1405                 num_cpu++;
1406         }
1407
1408         gpu_link = list_first_entry(&kdev->io_link_props,
1409                                         struct kfd_iolink_properties, list);
1410         if (!gpu_link)
1411                 return -ENOMEM;
1412
1413         for (i = 0; i < num_cpu; i++) {
1414                 /* CPU <--> GPU */
1415                 if (gpu_link->node_to == i)
1416                         continue;
1417
1418                 /* find CPU <-->  CPU links */
1419                 cpu_dev = kfd_topology_device_by_proximity_domain(i);
1420                 if (cpu_dev) {
1421                         list_for_each_entry(cpu_link,
1422                                         &cpu_dev->io_link_props, list) {
1423                                 if (cpu_link->node_to == gpu_link->node_to)
1424                                         break;
1425                         }
1426                 }
1427
1428                 if (cpu_link->node_to != gpu_link->node_to)
1429                         return -ENOMEM;
1430
1431                 /* CPU <--> CPU <--> GPU, GPU node*/
1432                 props = kfd_alloc_struct(props);
1433                 if (!props)
1434                         return -ENOMEM;
1435
1436                 memcpy(props, gpu_link, sizeof(struct kfd_iolink_properties));
1437                 props->weight = gpu_link->weight + cpu_link->weight;
1438                 props->min_latency = gpu_link->min_latency + cpu_link->min_latency;
1439                 props->max_latency = gpu_link->max_latency + cpu_link->max_latency;
1440                 props->min_bandwidth = min(gpu_link->min_bandwidth, cpu_link->min_bandwidth);
1441                 props->max_bandwidth = min(gpu_link->max_bandwidth, cpu_link->max_bandwidth);
1442
1443                 props->node_from = gpu_node;
1444                 props->node_to = i;
1445                 kdev->node_props.p2p_links_count++;
1446                 list_add_tail(&props->list, &kdev->p2p_link_props);
1447                 ret = kfd_build_p2p_node_entry(kdev, props);
1448                 if (ret < 0)
1449                         return ret;
1450
1451                 /* for small Bar, no CPU --> GPU in-direct links */
1452                 if (kfd_dev_is_large_bar(kdev->gpu)) {
1453                         /* CPU <--> CPU <--> GPU, CPU node*/
1454                         props2 = kfd_alloc_struct(props2);
1455                         if (!props2)
1456                                 return -ENOMEM;
1457
1458                         memcpy(props2, props, sizeof(struct kfd_iolink_properties));
1459                         props2->node_from = i;
1460                         props2->node_to = gpu_node;
1461                         props2->kobj = NULL;
1462                         cpu_dev->node_props.p2p_links_count++;
1463                         list_add_tail(&props2->list, &cpu_dev->p2p_link_props);
1464                         ret = kfd_build_p2p_node_entry(cpu_dev, props2);
1465                         if (ret < 0)
1466                                 return ret;
1467                 }
1468         }
1469         return ret;
1470 }
1471
1472 #if defined(CONFIG_HSA_AMD_P2P)
1473 static int kfd_add_peer_prop(struct kfd_topology_device *kdev,
1474                 struct kfd_topology_device *peer, int from, int to)
1475 {
1476         struct kfd_iolink_properties *props = NULL;
1477         struct kfd_iolink_properties *iolink1, *iolink2, *iolink3;
1478         struct kfd_topology_device *cpu_dev;
1479         int ret = 0;
1480
1481         if (!amdgpu_device_is_peer_accessible(
1482                                 kdev->gpu->adev,
1483                                 peer->gpu->adev))
1484                 return ret;
1485
1486         iolink1 = list_first_entry(&kdev->io_link_props,
1487                                                         struct kfd_iolink_properties, list);
1488         if (!iolink1)
1489                 return -ENOMEM;
1490
1491         iolink2 = list_first_entry(&peer->io_link_props,
1492                                                         struct kfd_iolink_properties, list);
1493         if (!iolink2)
1494                 return -ENOMEM;
1495
1496         props = kfd_alloc_struct(props);
1497         if (!props)
1498                 return -ENOMEM;
1499
1500         memcpy(props, iolink1, sizeof(struct kfd_iolink_properties));
1501
1502         props->weight = iolink1->weight + iolink2->weight;
1503         props->min_latency = iolink1->min_latency + iolink2->min_latency;
1504         props->max_latency = iolink1->max_latency + iolink2->max_latency;
1505         props->min_bandwidth = min(iolink1->min_bandwidth, iolink2->min_bandwidth);
1506         props->max_bandwidth = min(iolink2->max_bandwidth, iolink2->max_bandwidth);
1507
1508         if (iolink1->node_to != iolink2->node_to) {
1509                 /* CPU->CPU  link*/
1510                 cpu_dev = kfd_topology_device_by_proximity_domain(iolink1->node_to);
1511                 if (cpu_dev) {
1512                         list_for_each_entry(iolink3, &cpu_dev->io_link_props, list)
1513                                 if (iolink3->node_to == iolink2->node_to)
1514                                         break;
1515
1516                         props->weight += iolink3->weight;
1517                         props->min_latency += iolink3->min_latency;
1518                         props->max_latency += iolink3->max_latency;
1519                         props->min_bandwidth = min(props->min_bandwidth,
1520                                                         iolink3->min_bandwidth);
1521                         props->max_bandwidth = min(props->max_bandwidth,
1522                                                         iolink3->max_bandwidth);
1523                 } else {
1524                         WARN(1, "CPU node not found");
1525                 }
1526         }
1527
1528         props->node_from = from;
1529         props->node_to = to;
1530         peer->node_props.p2p_links_count++;
1531         list_add_tail(&props->list, &peer->p2p_link_props);
1532         ret = kfd_build_p2p_node_entry(peer, props);
1533
1534         return ret;
1535 }
1536 #endif
1537
1538 static int kfd_dev_create_p2p_links(void)
1539 {
1540         struct kfd_topology_device *dev;
1541         struct kfd_topology_device *new_dev;
1542 #if defined(CONFIG_HSA_AMD_P2P)
1543         uint32_t i;
1544 #endif
1545         uint32_t k;
1546         int ret = 0;
1547
1548         k = 0;
1549         list_for_each_entry(dev, &topology_device_list, list)
1550                 k++;
1551         if (k < 2)
1552                 return 0;
1553
1554         new_dev = list_last_entry(&topology_device_list, struct kfd_topology_device, list);
1555         if (WARN_ON(!new_dev->gpu))
1556                 return 0;
1557
1558         k--;
1559
1560         /* create in-direct links */
1561         ret = kfd_create_indirect_link_prop(new_dev, k);
1562         if (ret < 0)
1563                 goto out;
1564
1565         /* create p2p links */
1566 #if defined(CONFIG_HSA_AMD_P2P)
1567         i = 0;
1568         list_for_each_entry(dev, &topology_device_list, list) {
1569                 if (dev == new_dev)
1570                         break;
1571                 if (!dev->gpu || !dev->gpu->adev ||
1572                     (dev->gpu->hive_id &&
1573                      dev->gpu->hive_id == new_dev->gpu->hive_id))
1574                         goto next;
1575
1576                 /* check if node(s) is/are peer accessible in one direction or bi-direction */
1577                 ret = kfd_add_peer_prop(new_dev, dev, i, k);
1578                 if (ret < 0)
1579                         goto out;
1580
1581                 ret = kfd_add_peer_prop(dev, new_dev, k, i);
1582                 if (ret < 0)
1583                         goto out;
1584 next:
1585                 i++;
1586         }
1587 #endif
1588
1589 out:
1590         return ret;
1591 }
1592
1593 int kfd_topology_add_device(struct kfd_dev *gpu)
1594 {
1595         uint32_t gpu_id;
1596         struct kfd_topology_device *dev;
1597         struct kfd_cu_info cu_info;
1598         int res = 0;
1599         struct list_head temp_topology_device_list;
1600         void *crat_image = NULL;
1601         size_t image_size = 0;
1602         int proximity_domain;
1603         int i;
1604         const char *asic_name = amdgpu_asic_name[gpu->adev->asic_type];
1605
1606         INIT_LIST_HEAD(&temp_topology_device_list);
1607
1608         gpu_id = kfd_generate_gpu_id(gpu);
1609         pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1610
1611         /* Check to see if this gpu device exists in the topology_device_list.
1612          * If so, assign the gpu to that device,
1613          * else create a Virtual CRAT for this gpu device and then parse that
1614          * CRAT to create a new topology device. Once created assign the gpu to
1615          * that topology device
1616          */
1617         dev = kfd_assign_gpu(gpu);
1618         if (!dev) {
1619                 down_write(&topology_lock);
1620                 proximity_domain = ++topology_crat_proximity_domain;
1621
1622                 res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1623                                                     COMPUTE_UNIT_GPU, gpu,
1624                                                     proximity_domain);
1625                 if (res) {
1626                         pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1627                                gpu_id);
1628                         topology_crat_proximity_domain--;
1629                         return res;
1630                 }
1631                 res = kfd_parse_crat_table(crat_image,
1632                                            &temp_topology_device_list,
1633                                            proximity_domain);
1634                 if (res) {
1635                         pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1636                                gpu_id);
1637                         topology_crat_proximity_domain--;
1638                         goto err;
1639                 }
1640
1641                 kfd_topology_update_device_list(&temp_topology_device_list,
1642                         &topology_device_list);
1643
1644                 /* Update the SYSFS tree, since we added another topology
1645                  * device
1646                  */
1647                 res = kfd_topology_update_sysfs();
1648                 up_write(&topology_lock);
1649
1650                 if (!res)
1651                         sys_props.generation_count++;
1652                 else
1653                         pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1654                                                 gpu_id, res);
1655                 dev = kfd_assign_gpu(gpu);
1656                 if (WARN_ON(!dev)) {
1657                         res = -ENODEV;
1658                         goto err;
1659                 }
1660         }
1661
1662         dev->gpu_id = gpu_id;
1663         gpu->id = gpu_id;
1664
1665         kfd_dev_create_p2p_links();
1666
1667         /* TODO: Move the following lines to function
1668          *      kfd_add_non_crat_information
1669          */
1670
1671         /* Fill-in additional information that is not available in CRAT but
1672          * needed for the topology
1673          */
1674
1675         amdgpu_amdkfd_get_cu_info(dev->gpu->adev, &cu_info);
1676
1677         for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1; i++) {
1678                 dev->node_props.name[i] = __tolower(asic_name[i]);
1679                 if (asic_name[i] == '\0')
1680                         break;
1681         }
1682         dev->node_props.name[i] = '\0';
1683
1684         dev->node_props.simd_arrays_per_engine =
1685                 cu_info.num_shader_arrays_per_engine;
1686
1687         dev->node_props.gfx_target_version = gpu->device_info.gfx_target_version;
1688         dev->node_props.vendor_id = gpu->pdev->vendor;
1689         dev->node_props.device_id = gpu->pdev->device;
1690         dev->node_props.capability |=
1691                 ((dev->gpu->adev->rev_id << HSA_CAP_ASIC_REVISION_SHIFT) &
1692                         HSA_CAP_ASIC_REVISION_MASK);
1693         dev->node_props.location_id = pci_dev_id(gpu->pdev);
1694         dev->node_props.domain = pci_domain_nr(gpu->pdev->bus);
1695         dev->node_props.max_engine_clk_fcompute =
1696                 amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->adev);
1697         dev->node_props.max_engine_clk_ccompute =
1698                 cpufreq_quick_get_max(0) / 1000;
1699         dev->node_props.drm_render_minor =
1700                 gpu->shared_resources.drm_render_minor;
1701
1702         dev->node_props.hive_id = gpu->hive_id;
1703         dev->node_props.num_sdma_engines = kfd_get_num_sdma_engines(gpu);
1704         dev->node_props.num_sdma_xgmi_engines =
1705                                         kfd_get_num_xgmi_sdma_engines(gpu);
1706         dev->node_props.num_sdma_queues_per_engine =
1707                                 gpu->device_info.num_sdma_queues_per_engine -
1708                                 gpu->device_info.num_reserved_sdma_queues_per_engine;
1709         dev->node_props.num_gws = (dev->gpu->gws &&
1710                 dev->gpu->dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) ?
1711                 dev->gpu->adev->gds.gws_size : 0;
1712         dev->node_props.num_cp_queues = get_cp_queues_num(dev->gpu->dqm);
1713
1714         kfd_fill_mem_clk_max_info(dev);
1715         kfd_fill_iolink_non_crat_info(dev);
1716
1717         switch (dev->gpu->adev->asic_type) {
1718         case CHIP_KAVERI:
1719         case CHIP_HAWAII:
1720         case CHIP_TONGA:
1721                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
1722                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1723                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1724                 break;
1725         case CHIP_CARRIZO:
1726         case CHIP_FIJI:
1727         case CHIP_POLARIS10:
1728         case CHIP_POLARIS11:
1729         case CHIP_POLARIS12:
1730         case CHIP_VEGAM:
1731                 pr_debug("Adding doorbell packet type capability\n");
1732                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
1733                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1734                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1735                 break;
1736         default:
1737                 if (KFD_GC_VERSION(dev->gpu) >= IP_VERSION(9, 0, 1))
1738                         dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1739                                 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1740                                 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1741                 else
1742                         WARN(1, "Unexpected ASIC family %u",
1743                              dev->gpu->adev->asic_type);
1744         }
1745
1746         /*
1747          * Overwrite ATS capability according to needs_iommu_device to fix
1748          * potential missing corresponding bit in CRAT of BIOS.
1749          */
1750         if (dev->gpu->use_iommu_v2)
1751                 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
1752         else
1753                 dev->node_props.capability &= ~HSA_CAP_ATS_PRESENT;
1754
1755         /* Fix errors in CZ CRAT.
1756          * simd_count: Carrizo CRAT reports wrong simd_count, probably
1757          *              because it doesn't consider masked out CUs
1758          * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
1759          */
1760         if (dev->gpu->adev->asic_type == CHIP_CARRIZO) {
1761                 dev->node_props.simd_count =
1762                         cu_info.simd_per_cu * cu_info.cu_active_number;
1763                 dev->node_props.max_waves_per_simd = 10;
1764         }
1765
1766         /* kfd only concerns sram ecc on GFX and HBM ecc on UMC */
1767         dev->node_props.capability |=
1768                 ((dev->gpu->adev->ras_enabled & BIT(AMDGPU_RAS_BLOCK__GFX)) != 0) ?
1769                 HSA_CAP_SRAM_EDCSUPPORTED : 0;
1770         dev->node_props.capability |=
1771                 ((dev->gpu->adev->ras_enabled & BIT(AMDGPU_RAS_BLOCK__UMC)) != 0) ?
1772                 HSA_CAP_MEM_EDCSUPPORTED : 0;
1773
1774         if (KFD_GC_VERSION(dev->gpu) != IP_VERSION(9, 0, 1))
1775                 dev->node_props.capability |= (dev->gpu->adev->ras_enabled != 0) ?
1776                         HSA_CAP_RASEVENTNOTIFY : 0;
1777
1778         if (KFD_IS_SVM_API_SUPPORTED(dev->gpu->adev->kfd.dev))
1779                 dev->node_props.capability |= HSA_CAP_SVMAPI_SUPPORTED;
1780
1781         kfd_debug_print_topology();
1782
1783         if (!res)
1784                 kfd_notify_gpu_change(gpu_id, 1);
1785 err:
1786         kfd_destroy_crat_image(crat_image);
1787         return res;
1788 }
1789
1790 /**
1791  * kfd_topology_update_io_links() - Update IO links after device removal.
1792  * @proximity_domain: Proximity domain value of the dev being removed.
1793  *
1794  * The topology list currently is arranged in increasing order of
1795  * proximity domain.
1796  *
1797  * Two things need to be done when a device is removed:
1798  * 1. All the IO links to this device need to be removed.
1799  * 2. All nodes after the current device node need to move
1800  *    up once this device node is removed from the topology
1801  *    list. As a result, the proximity domain values for
1802  *    all nodes after the node being deleted reduce by 1.
1803  *    This would also cause the proximity domain values for
1804  *    io links to be updated based on new proximity domain
1805  *    values.
1806  *
1807  * Context: The caller must hold write topology_lock.
1808  */
1809 static void kfd_topology_update_io_links(int proximity_domain)
1810 {
1811         struct kfd_topology_device *dev;
1812         struct kfd_iolink_properties *iolink, *p2plink, *tmp;
1813
1814         list_for_each_entry(dev, &topology_device_list, list) {
1815                 if (dev->proximity_domain > proximity_domain)
1816                         dev->proximity_domain--;
1817
1818                 list_for_each_entry_safe(iolink, tmp, &dev->io_link_props, list) {
1819                         /*
1820                          * If there is an io link to the dev being deleted
1821                          * then remove that IO link also.
1822                          */
1823                         if (iolink->node_to == proximity_domain) {
1824                                 list_del(&iolink->list);
1825                                 dev->node_props.io_links_count--;
1826                         } else {
1827                                 if (iolink->node_from > proximity_domain)
1828                                         iolink->node_from--;
1829                                 if (iolink->node_to > proximity_domain)
1830                                         iolink->node_to--;
1831                         }
1832                 }
1833
1834                 list_for_each_entry_safe(p2plink, tmp, &dev->p2p_link_props, list) {
1835                         /*
1836                          * If there is a p2p link to the dev being deleted
1837                          * then remove that p2p link also.
1838                          */
1839                         if (p2plink->node_to == proximity_domain) {
1840                                 list_del(&p2plink->list);
1841                                 dev->node_props.p2p_links_count--;
1842                         } else {
1843                                 if (p2plink->node_from > proximity_domain)
1844                                         p2plink->node_from--;
1845                                 if (p2plink->node_to > proximity_domain)
1846                                         p2plink->node_to--;
1847                         }
1848                 }
1849         }
1850 }
1851
1852 int kfd_topology_remove_device(struct kfd_dev *gpu)
1853 {
1854         struct kfd_topology_device *dev, *tmp;
1855         uint32_t gpu_id;
1856         int res = -ENODEV;
1857         int i = 0;
1858
1859         down_write(&topology_lock);
1860
1861         list_for_each_entry_safe(dev, tmp, &topology_device_list, list) {
1862                 if (dev->gpu == gpu) {
1863                         gpu_id = dev->gpu_id;
1864                         kfd_remove_sysfs_node_entry(dev);
1865                         kfd_release_topology_device(dev);
1866                         sys_props.num_devices--;
1867                         kfd_topology_update_io_links(i);
1868                         topology_crat_proximity_domain = sys_props.num_devices-1;
1869                         sys_props.generation_count++;
1870                         res = 0;
1871                         if (kfd_topology_update_sysfs() < 0)
1872                                 kfd_topology_release_sysfs();
1873                         break;
1874                 }
1875                 i++;
1876         }
1877
1878         up_write(&topology_lock);
1879
1880         if (!res)
1881                 kfd_notify_gpu_change(gpu_id, 0);
1882
1883         return res;
1884 }
1885
1886 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
1887  *      topology. If GPU device is found @idx, then valid kfd_dev pointer is
1888  *      returned through @kdev
1889  * Return -     0: On success (@kdev will be NULL for non GPU nodes)
1890  *              -1: If end of list
1891  */
1892 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
1893 {
1894
1895         struct kfd_topology_device *top_dev;
1896         uint8_t device_idx = 0;
1897
1898         *kdev = NULL;
1899         down_read(&topology_lock);
1900
1901         list_for_each_entry(top_dev, &topology_device_list, list) {
1902                 if (device_idx == idx) {
1903                         *kdev = top_dev->gpu;
1904                         up_read(&topology_lock);
1905                         return 0;
1906                 }
1907
1908                 device_idx++;
1909         }
1910
1911         up_read(&topology_lock);
1912
1913         return -1;
1914
1915 }
1916
1917 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
1918 {
1919         int first_cpu_of_numa_node;
1920
1921         if (!cpumask || cpumask == cpu_none_mask)
1922                 return -1;
1923         first_cpu_of_numa_node = cpumask_first(cpumask);
1924         if (first_cpu_of_numa_node >= nr_cpu_ids)
1925                 return -1;
1926 #ifdef CONFIG_X86_64
1927         return cpu_data(first_cpu_of_numa_node).apicid;
1928 #else
1929         return first_cpu_of_numa_node;
1930 #endif
1931 }
1932
1933 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
1934  *      of the given NUMA node (numa_node_id)
1935  * Return -1 on failure
1936  */
1937 int kfd_numa_node_to_apic_id(int numa_node_id)
1938 {
1939         if (numa_node_id == -1) {
1940                 pr_warn("Invalid NUMA Node. Use online CPU mask\n");
1941                 return kfd_cpumask_to_apic_id(cpu_online_mask);
1942         }
1943         return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
1944 }
1945
1946 void kfd_double_confirm_iommu_support(struct kfd_dev *gpu)
1947 {
1948         struct kfd_topology_device *dev;
1949
1950         gpu->use_iommu_v2 = false;
1951
1952         if (!gpu->device_info.needs_iommu_device)
1953                 return;
1954
1955         down_read(&topology_lock);
1956
1957         /* Only use IOMMUv2 if there is an APU topology node with no GPU
1958          * assigned yet. This GPU will be assigned to it.
1959          */
1960         list_for_each_entry(dev, &topology_device_list, list)
1961                 if (dev->node_props.cpu_cores_count &&
1962                     dev->node_props.simd_count &&
1963                     !dev->gpu)
1964                         gpu->use_iommu_v2 = true;
1965
1966         up_read(&topology_lock);
1967 }
1968
1969 #if defined(CONFIG_DEBUG_FS)
1970
1971 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
1972 {
1973         struct kfd_topology_device *dev;
1974         unsigned int i = 0;
1975         int r = 0;
1976
1977         down_read(&topology_lock);
1978
1979         list_for_each_entry(dev, &topology_device_list, list) {
1980                 if (!dev->gpu) {
1981                         i++;
1982                         continue;
1983                 }
1984
1985                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1986                 r = dqm_debugfs_hqds(m, dev->gpu->dqm);
1987                 if (r)
1988                         break;
1989         }
1990
1991         up_read(&topology_lock);
1992
1993         return r;
1994 }
1995
1996 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
1997 {
1998         struct kfd_topology_device *dev;
1999         unsigned int i = 0;
2000         int r = 0;
2001
2002         down_read(&topology_lock);
2003
2004         list_for_each_entry(dev, &topology_device_list, list) {
2005                 if (!dev->gpu) {
2006                         i++;
2007                         continue;
2008                 }
2009
2010                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
2011                 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packet_mgr);
2012                 if (r)
2013                         break;
2014         }
2015
2016         up_read(&topology_lock);
2017
2018         return r;
2019 }
2020
2021 #endif