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

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include <linux/types.h>
  24 #include <linux/kernel.h>
  25 #include <linux/pci.h>
  26 #include <linux/errno.h>
  27 #include <linux/acpi.h>
  28 #include <linux/hash.h>
  29 #include <linux/cpufreq.h>
  30 #include <linux/log2.h>
  31 #include <linux/dmi.h>
  32 #include <linux/atomic.h>
  33
  34 #include "kfd_priv.h"
  35 #include "kfd_crat.h"
  36 #include "kfd_topology.h"
  37 #include "kfd_device_queue_manager.h"
  38 #include "kfd_iommu.h"
  39 #include "amdgpu_amdkfd.h"
  40 #include "amdgpu_ras.h"
  41
  42 /* topology_device_list - Master list of all topology devices */
  43 static struct list_head topology_device_list;
  44 static struct kfd_system_properties sys_props;
  45
  46 static DECLARE_RWSEM(topology_lock);
  47 static atomic_t topology_crat_proximity_domain;
  48
  49 struct kfd_topology_device *kfd_topology_device_by_proximity_domain(
  50                                                 uint32_t proximity_domain)
  51 {
  52         struct kfd_topology_device *top_dev;
  53         struct kfd_topology_device *device = NULL;
  54
  55         down_read(&topology_lock);
  56
  57         list_for_each_entry(top_dev, &topology_device_list, list)
  58                 if (top_dev->proximity_domain == proximity_domain) {
  59                         device = top_dev;
  60                         break;
  61                 }
  62
  63         up_read(&topology_lock);
  64
  65         return device;
  66 }
  67
  68 struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
  69 {
  70         struct kfd_topology_device *top_dev = NULL;
  71         struct kfd_topology_device *ret = NULL;
  72
  73         down_read(&topology_lock);
  74
  75         list_for_each_entry(top_dev, &topology_device_list, list)
  76                 if (top_dev->gpu_id == gpu_id) {
  77                         ret = top_dev;
  78                         break;
  79                 }
  80
  81         up_read(&topology_lock);
  82
  83         return ret;
  84 }
  85
  86 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
  87 {
  88         struct kfd_topology_device *top_dev;
  89
  90         top_dev = kfd_topology_device_by_id(gpu_id);
  91         if (!top_dev)
  92                 return NULL;
  93
  94         return top_dev->gpu;
  95 }
  96
  97 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
  98 {
  99         struct kfd_topology_device *top_dev;
 100         struct kfd_dev *device = NULL;
 101
 102         down_read(&topology_lock);
 103
 104         list_for_each_entry(top_dev, &topology_device_list, list)
 105                 if (top_dev->gpu && top_dev->gpu->pdev == pdev) {
 106                         device = top_dev->gpu;
 107                         break;
 108                 }
 109
 110         up_read(&topology_lock);
 111
 112         return device;
 113 }
 114
 115 struct kfd_dev *kfd_device_by_kgd(const struct kgd_dev *kgd)
 116 {
 117         struct kfd_topology_device *top_dev;
 118         struct kfd_dev *device = NULL;
 119
 120         down_read(&topology_lock);
 121
 122         list_for_each_entry(top_dev, &topology_device_list, list)
 123                 if (top_dev->gpu && top_dev->gpu->kgd == kgd) {
 124                         device = top_dev->gpu;
 125                         break;
 126                 }
 127
 128         up_read(&topology_lock);
 129
 130         return device;
 131 }
 132
 133 /* Called with write topology_lock acquired */
 134 static void kfd_release_topology_device(struct kfd_topology_device *dev)
 135 {
 136         struct kfd_mem_properties *mem;
 137         struct kfd_cache_properties *cache;
 138         struct kfd_iolink_properties *iolink;
 139         struct kfd_perf_properties *perf;
 140
 141         list_del(&dev->list);
 142
 143         while (dev->mem_props.next != &dev->mem_props) {
 144                 mem = container_of(dev->mem_props.next,
 145                                 struct kfd_mem_properties, list);
 146                 list_del(&mem->list);
 147                 kfree(mem);
 148         }
 149
 150         while (dev->cache_props.next != &dev->cache_props) {
 151                 cache = container_of(dev->cache_props.next,
 152                                 struct kfd_cache_properties, list);
 153                 list_del(&cache->list);
 154                 kfree(cache);
 155         }
 156
 157         while (dev->io_link_props.next != &dev->io_link_props) {
 158                 iolink = container_of(dev->io_link_props.next,
 159                                 struct kfd_iolink_properties, list);
 160                 list_del(&iolink->list);
 161                 kfree(iolink);
 162         }
 163
 164         while (dev->perf_props.next != &dev->perf_props) {
 165                 perf = container_of(dev->perf_props.next,
 166                                 struct kfd_perf_properties, list);
 167                 list_del(&perf->list);
 168                 kfree(perf);
 169         }
 170
 171         kfree(dev);
 172 }
 173
 174 void kfd_release_topology_device_list(struct list_head *device_list)
 175 {
 176         struct kfd_topology_device *dev;
 177
 178         while (!list_empty(device_list)) {
 179                 dev = list_first_entry(device_list,
 180                                        struct kfd_topology_device, list);
 181                 kfd_release_topology_device(dev);
 182         }
 183 }
 184
 185 static void kfd_release_live_view(void)
 186 {
 187         kfd_release_topology_device_list(&topology_device_list);
 188         memset(&sys_props, 0, sizeof(sys_props));
 189 }
 190
 191 struct kfd_topology_device *kfd_create_topology_device(
 192                                 struct list_head *device_list)
 193 {
 194         struct kfd_topology_device *dev;
 195
 196         dev = kfd_alloc_struct(dev);
 197         if (!dev) {
 198                 pr_err("No memory to allocate a topology device");
 199                 return NULL;
 200         }
 201
 202         INIT_LIST_HEAD(&dev->mem_props);
 203         INIT_LIST_HEAD(&dev->cache_props);
 204         INIT_LIST_HEAD(&dev->io_link_props);
 205         INIT_LIST_HEAD(&dev->perf_props);
 206
 207         list_add_tail(&dev->list, device_list);
 208
 209         return dev;
 210 }
 211
 212
 213 #define sysfs_show_gen_prop(buffer, fmt, ...) \
 214                 snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__)
 215 #define sysfs_show_32bit_prop(buffer, name, value) \
 216                 sysfs_show_gen_prop(buffer, "%s %u\n", name, value)
 217 #define sysfs_show_64bit_prop(buffer, name, value) \
 218                 sysfs_show_gen_prop(buffer, "%s %llu\n", name, value)
 219 #define sysfs_show_32bit_val(buffer, value) \
 220                 sysfs_show_gen_prop(buffer, "%u\n", value)
 221 #define sysfs_show_str_val(buffer, value) \
 222                 sysfs_show_gen_prop(buffer, "%s\n", value)
 223
 224 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
 225                 char *buffer)
 226 {
 227         ssize_t ret;
 228
 229         /* Making sure that the buffer is an empty string */
 230         buffer[0] = 0;
 231
 232         if (attr == &sys_props.attr_genid) {
 233                 ret = sysfs_show_32bit_val(buffer, sys_props.generation_count);
 234         } else if (attr == &sys_props.attr_props) {
 235                 sysfs_show_64bit_prop(buffer, "platform_oem",
 236                                 sys_props.platform_oem);
 237                 sysfs_show_64bit_prop(buffer, "platform_id",
 238                                 sys_props.platform_id);
 239                 ret = sysfs_show_64bit_prop(buffer, "platform_rev",
 240                                 sys_props.platform_rev);
 241         } else {
 242                 ret = -EINVAL;
 243         }
 244
 245         return ret;
 246 }
 247
 248 static void kfd_topology_kobj_release(struct kobject *kobj)
 249 {
 250         kfree(kobj);
 251 }
 252
 253 static const struct sysfs_ops sysprops_ops = {
 254         .show = sysprops_show,
 255 };
 256
 257 static struct kobj_type sysprops_type = {
 258         .release = kfd_topology_kobj_release,
 259         .sysfs_ops = &sysprops_ops,
 260 };
 261
 262 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
 263                 char *buffer)
 264 {
 265         ssize_t ret;
 266         struct kfd_iolink_properties *iolink;
 267
 268         /* Making sure that the buffer is an empty string */
 269         buffer[0] = 0;
 270
 271         iolink = container_of(attr, struct kfd_iolink_properties, attr);
 272         if (iolink->gpu && kfd_devcgroup_check_permission(iolink->gpu))
 273                 return -EPERM;
 274         sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type);
 275         sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj);
 276         sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min);
 277         sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from);
 278         sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to);
 279         sysfs_show_32bit_prop(buffer, "weight", iolink->weight);
 280         sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency);
 281         sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency);
 282         sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth);
 283         sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth);
 284         sysfs_show_32bit_prop(buffer, "recommended_transfer_size",
 285                         iolink->rec_transfer_size);
 286         ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags);
 287
 288         return ret;
 289 }
 290
 291 static const struct sysfs_ops iolink_ops = {
 292         .show = iolink_show,
 293 };
 294
 295 static struct kobj_type iolink_type = {
 296         .release = kfd_topology_kobj_release,
 297         .sysfs_ops = &iolink_ops,
 298 };
 299
 300 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
 301                 char *buffer)
 302 {
 303         ssize_t ret;
 304         struct kfd_mem_properties *mem;
 305
 306         /* Making sure that the buffer is an empty string */
 307         buffer[0] = 0;
 308
 309         mem = container_of(attr, struct kfd_mem_properties, attr);
 310         if (mem->gpu && kfd_devcgroup_check_permission(mem->gpu))
 311                 return -EPERM;
 312         sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type);
 313         sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes);
 314         sysfs_show_32bit_prop(buffer, "flags", mem->flags);
 315         sysfs_show_32bit_prop(buffer, "width", mem->width);
 316         ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max);
 317
 318         return ret;
 319 }
 320
 321 static const struct sysfs_ops mem_ops = {
 322         .show = mem_show,
 323 };
 324
 325 static struct kobj_type mem_type = {
 326         .release = kfd_topology_kobj_release,
 327         .sysfs_ops = &mem_ops,
 328 };
 329
 330 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
 331                 char *buffer)
 332 {
 333         ssize_t ret;
 334         uint32_t i, j;
 335         struct kfd_cache_properties *cache;
 336
 337         /* Making sure that the buffer is an empty string */
 338         buffer[0] = 0;
 339
 340         cache = container_of(attr, struct kfd_cache_properties, attr);
 341         if (cache->gpu && kfd_devcgroup_check_permission(cache->gpu))
 342                 return -EPERM;
 343         sysfs_show_32bit_prop(buffer, "processor_id_low",
 344                         cache->processor_id_low);
 345         sysfs_show_32bit_prop(buffer, "level", cache->cache_level);
 346         sysfs_show_32bit_prop(buffer, "size", cache->cache_size);
 347         sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size);
 348         sysfs_show_32bit_prop(buffer, "cache_lines_per_tag",
 349                         cache->cachelines_per_tag);
 350         sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc);
 351         sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency);
 352         sysfs_show_32bit_prop(buffer, "type", cache->cache_type);
 353         snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer);
 354         for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++)
 355                 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++) {
 356                         /* Check each bit */
 357                         if (cache->sibling_map[i] & (1 << j))
 358                                 ret = snprintf(buffer, PAGE_SIZE,
 359                                          "%s%d%s", buffer, 1, ",");
 360                         else
 361                                 ret = snprintf(buffer, PAGE_SIZE,
 362                                          "%s%d%s", buffer, 0, ",");
 363                 }
 364         /* Replace the last "," with end of line */
 365         *(buffer + strlen(buffer) - 1) = 0xA;
 366         return ret;
 367 }
 368
 369 static const struct sysfs_ops cache_ops = {
 370         .show = kfd_cache_show,
 371 };
 372
 373 static struct kobj_type cache_type = {
 374         .release = kfd_topology_kobj_release,
 375         .sysfs_ops = &cache_ops,
 376 };
 377
 378 /****** Sysfs of Performance Counters ******/
 379
 380 struct kfd_perf_attr {
 381         struct kobj_attribute attr;
 382         uint32_t data;
 383 };
 384
 385 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
 386                         char *buf)
 387 {
 388         struct kfd_perf_attr *attr;
 389
 390         buf[0] = 0;
 391         attr = container_of(attrs, struct kfd_perf_attr, attr);
 392         if (!attr->data) /* invalid data for PMC */
 393                 return 0;
 394         else
 395                 return sysfs_show_32bit_val(buf, attr->data);
 396 }
 397
 398 #define KFD_PERF_DESC(_name, _data)                     \
 399 {                                                       \
 400         .attr  = __ATTR(_name, 0444, perf_show, NULL),  \
 401         .data = _data,                                  \
 402 }
 403
 404 static struct kfd_perf_attr perf_attr_iommu[] = {
 405         KFD_PERF_DESC(max_concurrent, 0),
 406         KFD_PERF_DESC(num_counters, 0),
 407         KFD_PERF_DESC(counter_ids, 0),
 408 };
 409 /****************************************/
 410
 411 static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
 412                 char *buffer)
 413 {
 414         struct kfd_topology_device *dev;
 415         uint32_t log_max_watch_addr;
 416
 417         /* Making sure that the buffer is an empty string */
 418         buffer[0] = 0;
 419
 420         if (strcmp(attr->name, "gpu_id") == 0) {
 421                 dev = container_of(attr, struct kfd_topology_device,
 422                                 attr_gpuid);
 423                 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 424                         return -EPERM;
 425                 return sysfs_show_32bit_val(buffer, dev->gpu_id);
 426         }
 427
 428         if (strcmp(attr->name, "name") == 0) {
 429                 dev = container_of(attr, struct kfd_topology_device,
 430                                 attr_name);
 431
 432                 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 433                         return -EPERM;
 434                 return sysfs_show_str_val(buffer, dev->node_props.name);
 435         }
 436
 437         dev = container_of(attr, struct kfd_topology_device,
 438                         attr_props);
 439         if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
 440                 return -EPERM;
 441         sysfs_show_32bit_prop(buffer, "cpu_cores_count",
 442                         dev->node_props.cpu_cores_count);
 443         sysfs_show_32bit_prop(buffer, "simd_count",
 444                         dev->node_props.simd_count);
 445         sysfs_show_32bit_prop(buffer, "mem_banks_count",
 446                         dev->node_props.mem_banks_count);
 447         sysfs_show_32bit_prop(buffer, "caches_count",
 448                         dev->node_props.caches_count);
 449         sysfs_show_32bit_prop(buffer, "io_links_count",
 450                         dev->node_props.io_links_count);
 451         sysfs_show_32bit_prop(buffer, "cpu_core_id_base",
 452                         dev->node_props.cpu_core_id_base);
 453         sysfs_show_32bit_prop(buffer, "simd_id_base",
 454                         dev->node_props.simd_id_base);
 455         sysfs_show_32bit_prop(buffer, "max_waves_per_simd",
 456                         dev->node_props.max_waves_per_simd);
 457         sysfs_show_32bit_prop(buffer, "lds_size_in_kb",
 458                         dev->node_props.lds_size_in_kb);
 459         sysfs_show_32bit_prop(buffer, "gds_size_in_kb",
 460                         dev->node_props.gds_size_in_kb);
 461         sysfs_show_32bit_prop(buffer, "num_gws",
 462                         dev->node_props.num_gws);
 463         sysfs_show_32bit_prop(buffer, "wave_front_size",
 464                         dev->node_props.wave_front_size);
 465         sysfs_show_32bit_prop(buffer, "array_count",
 466                         dev->node_props.array_count);
 467         sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine",
 468                         dev->node_props.simd_arrays_per_engine);
 469         sysfs_show_32bit_prop(buffer, "cu_per_simd_array",
 470                         dev->node_props.cu_per_simd_array);
 471         sysfs_show_32bit_prop(buffer, "simd_per_cu",
 472                         dev->node_props.simd_per_cu);
 473         sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu",
 474                         dev->node_props.max_slots_scratch_cu);
 475         sysfs_show_32bit_prop(buffer, "vendor_id",
 476                         dev->node_props.vendor_id);
 477         sysfs_show_32bit_prop(buffer, "device_id",
 478                         dev->node_props.device_id);
 479         sysfs_show_32bit_prop(buffer, "location_id",
 480                         dev->node_props.location_id);
 481         sysfs_show_32bit_prop(buffer, "drm_render_minor",
 482                         dev->node_props.drm_render_minor);
 483         sysfs_show_64bit_prop(buffer, "hive_id",
 484                         dev->node_props.hive_id);
 485         sysfs_show_32bit_prop(buffer, "num_sdma_engines",
 486                         dev->node_props.num_sdma_engines);
 487         sysfs_show_32bit_prop(buffer, "num_sdma_xgmi_engines",
 488                         dev->node_props.num_sdma_xgmi_engines);
 489         sysfs_show_32bit_prop(buffer, "num_sdma_queues_per_engine",
 490                         dev->node_props.num_sdma_queues_per_engine);
 491         sysfs_show_32bit_prop(buffer, "num_cp_queues",
 492                         dev->node_props.num_cp_queues);
 493         sysfs_show_64bit_prop(buffer, "unique_id",
 494                         dev->node_props.unique_id);
 495
 496         if (dev->gpu) {
 497                 log_max_watch_addr =
 498                         __ilog2_u32(dev->gpu->device_info->num_of_watch_points);
 499
 500                 if (log_max_watch_addr) {
 501                         dev->node_props.capability |=
 502                                         HSA_CAP_WATCH_POINTS_SUPPORTED;
 503
 504                         dev->node_props.capability |=
 505                                 ((log_max_watch_addr <<
 506                                         HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
 507                                 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
 508                 }
 509
 510                 if (dev->gpu->device_info->asic_family == CHIP_TONGA)
 511                         dev->node_props.capability |=
 512                                         HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
 513
 514                 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute",
 515                         dev->node_props.max_engine_clk_fcompute);
 516
 517                 sysfs_show_64bit_prop(buffer, "local_mem_size",
 518                                 (unsigned long long int) 0);
 519
 520                 sysfs_show_32bit_prop(buffer, "fw_version",
 521                                 dev->gpu->mec_fw_version);
 522                 sysfs_show_32bit_prop(buffer, "capability",
 523                                 dev->node_props.capability);
 524                 sysfs_show_32bit_prop(buffer, "sdma_fw_version",
 525                                 dev->gpu->sdma_fw_version);
 526         }
 527
 528         return sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute",
 529                                         cpufreq_quick_get_max(0)/1000);
 530 }
 531
 532 static const struct sysfs_ops node_ops = {
 533         .show = node_show,
 534 };
 535
 536 static struct kobj_type node_type = {
 537         .release = kfd_topology_kobj_release,
 538         .sysfs_ops = &node_ops,
 539 };
 540
 541 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
 542 {
 543         sysfs_remove_file(kobj, attr);
 544         kobject_del(kobj);
 545         kobject_put(kobj);
 546 }
 547
 548 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
 549 {
 550         struct kfd_iolink_properties *iolink;
 551         struct kfd_cache_properties *cache;
 552         struct kfd_mem_properties *mem;
 553         struct kfd_perf_properties *perf;
 554
 555         if (dev->kobj_iolink) {
 556                 list_for_each_entry(iolink, &dev->io_link_props, list)
 557                         if (iolink->kobj) {
 558                                 kfd_remove_sysfs_file(iolink->kobj,
 559                                                         &iolink->attr);
 560                                 iolink->kobj = NULL;
 561                         }
 562                 kobject_del(dev->kobj_iolink);
 563                 kobject_put(dev->kobj_iolink);
 564                 dev->kobj_iolink = NULL;
 565         }
 566
 567         if (dev->kobj_cache) {
 568                 list_for_each_entry(cache, &dev->cache_props, list)
 569                         if (cache->kobj) {
 570                                 kfd_remove_sysfs_file(cache->kobj,
 571                                                         &cache->attr);
 572                                 cache->kobj = NULL;
 573                         }
 574                 kobject_del(dev->kobj_cache);
 575                 kobject_put(dev->kobj_cache);
 576                 dev->kobj_cache = NULL;
 577         }
 578
 579         if (dev->kobj_mem) {
 580                 list_for_each_entry(mem, &dev->mem_props, list)
 581                         if (mem->kobj) {
 582                                 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
 583                                 mem->kobj = NULL;
 584                         }
 585                 kobject_del(dev->kobj_mem);
 586                 kobject_put(dev->kobj_mem);
 587                 dev->kobj_mem = NULL;
 588         }
 589
 590         if (dev->kobj_perf) {
 591                 list_for_each_entry(perf, &dev->perf_props, list) {
 592                         kfree(perf->attr_group);
 593                         perf->attr_group = NULL;
 594                 }
 595                 kobject_del(dev->kobj_perf);
 596                 kobject_put(dev->kobj_perf);
 597                 dev->kobj_perf = NULL;
 598         }
 599
 600         if (dev->kobj_node) {
 601                 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
 602                 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
 603                 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
 604                 kobject_del(dev->kobj_node);
 605                 kobject_put(dev->kobj_node);
 606                 dev->kobj_node = NULL;
 607         }
 608 }
 609
 610 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
 611                 uint32_t id)
 612 {
 613         struct kfd_iolink_properties *iolink;
 614         struct kfd_cache_properties *cache;
 615         struct kfd_mem_properties *mem;
 616         struct kfd_perf_properties *perf;
 617         int ret;
 618         uint32_t i, num_attrs;
 619         struct attribute **attrs;
 620
 621         if (WARN_ON(dev->kobj_node))
 622                 return -EEXIST;
 623
 624         /*
 625          * Creating the sysfs folders
 626          */
 627         dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
 628         if (!dev->kobj_node)
 629                 return -ENOMEM;
 630
 631         ret = kobject_init_and_add(dev->kobj_node, &node_type,
 632                         sys_props.kobj_nodes, "%d", id);
 633         if (ret < 0)
 634                 return ret;
 635
 636         dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
 637         if (!dev->kobj_mem)
 638                 return -ENOMEM;
 639
 640         dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
 641         if (!dev->kobj_cache)
 642                 return -ENOMEM;
 643
 644         dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
 645         if (!dev->kobj_iolink)
 646                 return -ENOMEM;
 647
 648         dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
 649         if (!dev->kobj_perf)
 650                 return -ENOMEM;
 651
 652         /*
 653          * Creating sysfs files for node properties
 654          */
 655         dev->attr_gpuid.name = "gpu_id";
 656         dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
 657         sysfs_attr_init(&dev->attr_gpuid);
 658         dev->attr_name.name = "name";
 659         dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
 660         sysfs_attr_init(&dev->attr_name);
 661         dev->attr_props.name = "properties";
 662         dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
 663         sysfs_attr_init(&dev->attr_props);
 664         ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
 665         if (ret < 0)
 666                 return ret;
 667         ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
 668         if (ret < 0)
 669                 return ret;
 670         ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
 671         if (ret < 0)
 672                 return ret;
 673
 674         i = 0;
 675         list_for_each_entry(mem, &dev->mem_props, list) {
 676                 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 677                 if (!mem->kobj)
 678                         return -ENOMEM;
 679                 ret = kobject_init_and_add(mem->kobj, &mem_type,
 680                                 dev->kobj_mem, "%d", i);
 681                 if (ret < 0)
 682                         return ret;
 683
 684                 mem->attr.name = "properties";
 685                 mem->attr.mode = KFD_SYSFS_FILE_MODE;
 686                 sysfs_attr_init(&mem->attr);
 687                 ret = sysfs_create_file(mem->kobj, &mem->attr);
 688                 if (ret < 0)
 689                         return ret;
 690                 i++;
 691         }
 692
 693         i = 0;
 694         list_for_each_entry(cache, &dev->cache_props, list) {
 695                 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 696                 if (!cache->kobj)
 697                         return -ENOMEM;
 698                 ret = kobject_init_and_add(cache->kobj, &cache_type,
 699                                 dev->kobj_cache, "%d", i);
 700                 if (ret < 0)
 701                         return ret;
 702
 703                 cache->attr.name = "properties";
 704                 cache->attr.mode = KFD_SYSFS_FILE_MODE;
 705                 sysfs_attr_init(&cache->attr);
 706                 ret = sysfs_create_file(cache->kobj, &cache->attr);
 707                 if (ret < 0)
 708                         return ret;
 709                 i++;
 710         }
 711
 712         i = 0;
 713         list_for_each_entry(iolink, &dev->io_link_props, list) {
 714                 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
 715                 if (!iolink->kobj)
 716                         return -ENOMEM;
 717                 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
 718                                 dev->kobj_iolink, "%d", i);
 719                 if (ret < 0)
 720                         return ret;
 721
 722                 iolink->attr.name = "properties";
 723                 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
 724                 sysfs_attr_init(&iolink->attr);
 725                 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
 726                 if (ret < 0)
 727                         return ret;
 728                 i++;
 729         }
 730
 731         /* All hardware blocks have the same number of attributes. */
 732         num_attrs = ARRAY_SIZE(perf_attr_iommu);
 733         list_for_each_entry(perf, &dev->perf_props, list) {
 734                 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
 735                         * num_attrs + sizeof(struct attribute_group),
 736                         GFP_KERNEL);
 737                 if (!perf->attr_group)
 738                         return -ENOMEM;
 739
 740                 attrs = (struct attribute **)(perf->attr_group + 1);
 741                 if (!strcmp(perf->block_name, "iommu")) {
 742                 /* Information of IOMMU's num_counters and counter_ids is shown
 743                  * under /sys/bus/event_source/devices/amd_iommu. We don't
 744                  * duplicate here.
 745                  */
 746                         perf_attr_iommu[0].data = perf->max_concurrent;
 747                         for (i = 0; i < num_attrs; i++)
 748                                 attrs[i] = &perf_attr_iommu[i].attr.attr;
 749                 }
 750                 perf->attr_group->name = perf->block_name;
 751                 perf->attr_group->attrs = attrs;
 752                 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
 753                 if (ret < 0)
 754                         return ret;
 755         }
 756
 757         return 0;
 758 }
 759
 760 /* Called with write topology lock acquired */
 761 static int kfd_build_sysfs_node_tree(void)
 762 {
 763         struct kfd_topology_device *dev;
 764         int ret;
 765         uint32_t i = 0;
 766
 767         list_for_each_entry(dev, &topology_device_list, list) {
 768                 ret = kfd_build_sysfs_node_entry(dev, i);
 769                 if (ret < 0)
 770                         return ret;
 771                 i++;
 772         }
 773
 774         return 0;
 775 }
 776
 777 /* Called with write topology lock acquired */
 778 static void kfd_remove_sysfs_node_tree(void)
 779 {
 780         struct kfd_topology_device *dev;
 781
 782         list_for_each_entry(dev, &topology_device_list, list)
 783                 kfd_remove_sysfs_node_entry(dev);
 784 }
 785
 786 static int kfd_topology_update_sysfs(void)
 787 {
 788         int ret;
 789
 790         pr_info("Creating topology SYSFS entries\n");
 791         if (!sys_props.kobj_topology) {
 792                 sys_props.kobj_topology =
 793                                 kfd_alloc_struct(sys_props.kobj_topology);
 794                 if (!sys_props.kobj_topology)
 795                         return -ENOMEM;
 796
 797                 ret = kobject_init_and_add(sys_props.kobj_topology,
 798                                 &sysprops_type,  &kfd_device->kobj,
 799                                 "topology");
 800                 if (ret < 0)
 801                         return ret;
 802
 803                 sys_props.kobj_nodes = kobject_create_and_add("nodes",
 804                                 sys_props.kobj_topology);
 805                 if (!sys_props.kobj_nodes)
 806                         return -ENOMEM;
 807
 808                 sys_props.attr_genid.name = "generation_id";
 809                 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
 810                 sysfs_attr_init(&sys_props.attr_genid);
 811                 ret = sysfs_create_file(sys_props.kobj_topology,
 812                                 &sys_props.attr_genid);
 813                 if (ret < 0)
 814                         return ret;
 815
 816                 sys_props.attr_props.name = "system_properties";
 817                 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
 818                 sysfs_attr_init(&sys_props.attr_props);
 819                 ret = sysfs_create_file(sys_props.kobj_topology,
 820                                 &sys_props.attr_props);
 821                 if (ret < 0)
 822                         return ret;
 823         }
 824
 825         kfd_remove_sysfs_node_tree();
 826
 827         return kfd_build_sysfs_node_tree();
 828 }
 829
 830 static void kfd_topology_release_sysfs(void)
 831 {
 832         kfd_remove_sysfs_node_tree();
 833         if (sys_props.kobj_topology) {
 834                 sysfs_remove_file(sys_props.kobj_topology,
 835                                 &sys_props.attr_genid);
 836                 sysfs_remove_file(sys_props.kobj_topology,
 837                                 &sys_props.attr_props);
 838                 if (sys_props.kobj_nodes) {
 839                         kobject_del(sys_props.kobj_nodes);
 840                         kobject_put(sys_props.kobj_nodes);
 841                         sys_props.kobj_nodes = NULL;
 842                 }
 843                 kobject_del(sys_props.kobj_topology);
 844                 kobject_put(sys_props.kobj_topology);
 845                 sys_props.kobj_topology = NULL;
 846         }
 847 }
 848
 849 /* Called with write topology_lock acquired */
 850 static void kfd_topology_update_device_list(struct list_head *temp_list,
 851                                         struct list_head *master_list)
 852 {
 853         while (!list_empty(temp_list)) {
 854                 list_move_tail(temp_list->next, master_list);
 855                 sys_props.num_devices++;
 856         }
 857 }
 858
 859 static void kfd_debug_print_topology(void)
 860 {
 861         struct kfd_topology_device *dev;
 862
 863         down_read(&topology_lock);
 864
 865         dev = list_last_entry(&topology_device_list,
 866                         struct kfd_topology_device, list);
 867         if (dev) {
 868                 if (dev->node_props.cpu_cores_count &&
 869                                 dev->node_props.simd_count) {
 870                         pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
 871                                 dev->node_props.device_id,
 872                                 dev->node_props.vendor_id);
 873                 } else if (dev->node_props.cpu_cores_count)
 874                         pr_info("Topology: Add CPU node\n");
 875                 else if (dev->node_props.simd_count)
 876                         pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
 877                                 dev->node_props.device_id,
 878                                 dev->node_props.vendor_id);
 879         }
 880         up_read(&topology_lock);
 881 }
 882
 883 /* Helper function for intializing platform_xx members of
 884  * kfd_system_properties. Uses OEM info from the last CPU/APU node.
 885  */
 886 static void kfd_update_system_properties(void)
 887 {
 888         struct kfd_topology_device *dev;
 889
 890         down_read(&topology_lock);
 891         dev = list_last_entry(&topology_device_list,
 892                         struct kfd_topology_device, list);
 893         if (dev) {
 894                 sys_props.platform_id =
 895                         (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
 896                 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
 897                 sys_props.platform_rev = dev->oem_revision;
 898         }
 899         up_read(&topology_lock);
 900 }
 901
 902 static void find_system_memory(const struct dmi_header *dm,
 903         void *private)
 904 {
 905         struct kfd_mem_properties *mem;
 906         u16 mem_width, mem_clock;
 907         struct kfd_topology_device *kdev =
 908                 (struct kfd_topology_device *)private;
 909         const u8 *dmi_data = (const u8 *)(dm + 1);
 910
 911         if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
 912                 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
 913                 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
 914                 list_for_each_entry(mem, &kdev->mem_props, list) {
 915                         if (mem_width != 0xFFFF && mem_width != 0)
 916                                 mem->width = mem_width;
 917                         if (mem_clock != 0)
 918                                 mem->mem_clk_max = mem_clock;
 919                 }
 920         }
 921 }
 922
 923 /*
 924  * Performance counters information is not part of CRAT but we would like to
 925  * put them in the sysfs under topology directory for Thunk to get the data.
 926  * This function is called before updating the sysfs.
 927  */
 928 static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev)
 929 {
 930         /* These are the only counters supported so far */
 931         return kfd_iommu_add_perf_counters(kdev);
 932 }
 933
 934 /* kfd_add_non_crat_information - Add information that is not currently
 935  *      defined in CRAT but is necessary for KFD topology
 936  * @dev - topology device to which addition info is added
 937  */
 938 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
 939 {
 940         /* Check if CPU only node. */
 941         if (!kdev->gpu) {
 942                 /* Add system memory information */
 943                 dmi_walk(find_system_memory, kdev);
 944         }
 945         /* TODO: For GPU node, rearrange code from kfd_topology_add_device */
 946 }
 947
 948 /* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices.
 949  *      Ignore CRAT for all other devices. AMD APU is identified if both CPU
 950  *      and GPU cores are present.
 951  * @device_list - topology device list created by parsing ACPI CRAT table.
 952  * @return - TRUE if invalid, FALSE is valid.
 953  */
 954 static bool kfd_is_acpi_crat_invalid(struct list_head *device_list)
 955 {
 956         struct kfd_topology_device *dev;
 957
 958         list_for_each_entry(dev, device_list, list) {
 959                 if (dev->node_props.cpu_cores_count &&
 960                         dev->node_props.simd_count)
 961                         return false;
 962         }
 963         pr_info("Ignoring ACPI CRAT on non-APU system\n");
 964         return true;
 965 }
 966
 967 int kfd_topology_init(void)
 968 {
 969         void *crat_image = NULL;
 970         size_t image_size = 0;
 971         int ret;
 972         struct list_head temp_topology_device_list;
 973         int cpu_only_node = 0;
 974         struct kfd_topology_device *kdev;
 975         int proximity_domain;
 976
 977         /* topology_device_list - Master list of all topology devices
 978          * temp_topology_device_list - temporary list created while parsing CRAT
 979          * or VCRAT. Once parsing is complete the contents of list is moved to
 980          * topology_device_list
 981          */
 982
 983         /* Initialize the head for the both the lists */
 984         INIT_LIST_HEAD(&topology_device_list);
 985         INIT_LIST_HEAD(&temp_topology_device_list);
 986         init_rwsem(&topology_lock);
 987
 988         memset(&sys_props, 0, sizeof(sys_props));
 989
 990         /* Proximity domains in ACPI CRAT tables start counting at
 991          * 0. The same should be true for virtual CRAT tables created
 992          * at this stage. GPUs added later in kfd_topology_add_device
 993          * use a counter.
 994          */
 995         proximity_domain = 0;
 996
 997         /*
 998          * Get the CRAT image from the ACPI. If ACPI doesn't have one
 999          * or if ACPI CRAT is invalid create a virtual CRAT.
1000          * NOTE: The current implementation expects all AMD APUs to have
1001          *      CRAT. If no CRAT is available, it is assumed to be a CPU
1002          */
1003         ret = kfd_create_crat_image_acpi(&crat_image, &image_size);
1004         if (!ret) {
1005                 ret = kfd_parse_crat_table(crat_image,
1006                                            &temp_topology_device_list,
1007                                            proximity_domain);
1008                 if (ret ||
1009                     kfd_is_acpi_crat_invalid(&temp_topology_device_list)) {
1010                         kfd_release_topology_device_list(
1011                                 &temp_topology_device_list);
1012                         kfd_destroy_crat_image(crat_image);
1013                         crat_image = NULL;
1014                 }
1015         }
1016
1017         if (!crat_image) {
1018                 ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
1019                                                     COMPUTE_UNIT_CPU, NULL,
1020                                                     proximity_domain);
1021                 cpu_only_node = 1;
1022                 if (ret) {
1023                         pr_err("Error creating VCRAT table for CPU\n");
1024                         return ret;
1025                 }
1026
1027                 ret = kfd_parse_crat_table(crat_image,
1028                                            &temp_topology_device_list,
1029                                            proximity_domain);
1030                 if (ret) {
1031                         pr_err("Error parsing VCRAT table for CPU\n");
1032                         goto err;
1033                 }
1034         }
1035
1036         kdev = list_first_entry(&temp_topology_device_list,
1037                                 struct kfd_topology_device, list);
1038         kfd_add_perf_to_topology(kdev);
1039
1040         down_write(&topology_lock);
1041         kfd_topology_update_device_list(&temp_topology_device_list,
1042                                         &topology_device_list);
1043         atomic_set(&topology_crat_proximity_domain, sys_props.num_devices-1);
1044         ret = kfd_topology_update_sysfs();
1045         up_write(&topology_lock);
1046
1047         if (!ret) {
1048                 sys_props.generation_count++;
1049                 kfd_update_system_properties();
1050                 kfd_debug_print_topology();
1051                 pr_info("Finished initializing topology\n");
1052         } else
1053                 pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1054
1055         /* For nodes with GPU, this information gets added
1056          * when GPU is detected (kfd_topology_add_device).
1057          */
1058         if (cpu_only_node) {
1059                 /* Add additional information to CPU only node created above */
1060                 down_write(&topology_lock);
1061                 kdev = list_first_entry(&topology_device_list,
1062                                 struct kfd_topology_device, list);
1063                 up_write(&topology_lock);
1064                 kfd_add_non_crat_information(kdev);
1065         }
1066
1067 err:
1068         kfd_destroy_crat_image(crat_image);
1069         return ret;
1070 }
1071
1072 void kfd_topology_shutdown(void)
1073 {
1074         down_write(&topology_lock);
1075         kfd_topology_release_sysfs();
1076         kfd_release_live_view();
1077         up_write(&topology_lock);
1078 }
1079
1080 static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1081 {
1082         uint32_t hashout;
1083         uint32_t buf[7];
1084         uint64_t local_mem_size;
1085         int i;
1086         struct kfd_local_mem_info local_mem_info;
1087
1088         if (!gpu)
1089                 return 0;
1090
1091         amdgpu_amdkfd_get_local_mem_info(gpu->kgd, &local_mem_info);
1092
1093         local_mem_size = local_mem_info.local_mem_size_private +
1094                         local_mem_info.local_mem_size_public;
1095
1096         buf[0] = gpu->pdev->devfn;
1097         buf[1] = gpu->pdev->subsystem_vendor |
1098                 (gpu->pdev->subsystem_device << 16);
1099         buf[2] = pci_domain_nr(gpu->pdev->bus);
1100         buf[3] = gpu->pdev->device;
1101         buf[4] = gpu->pdev->bus->number;
1102         buf[5] = lower_32_bits(local_mem_size);
1103         buf[6] = upper_32_bits(local_mem_size);
1104
1105         for (i = 0, hashout = 0; i < 7; i++)
1106                 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1107
1108         return hashout;
1109 }
1110 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1111  *              the GPU device is not already present in the topology device
1112  *              list then return NULL. This means a new topology device has to
1113  *              be created for this GPU.
1114  */
1115 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1116 {
1117         struct kfd_topology_device *dev;
1118         struct kfd_topology_device *out_dev = NULL;
1119         struct kfd_mem_properties *mem;
1120         struct kfd_cache_properties *cache;
1121         struct kfd_iolink_properties *iolink;
1122
1123         down_write(&topology_lock);
1124         list_for_each_entry(dev, &topology_device_list, list) {
1125                 /* Discrete GPUs need their own topology device list
1126                  * entries. Don't assign them to CPU/APU nodes.
1127                  */
1128                 if (!gpu->device_info->needs_iommu_device &&
1129                     dev->node_props.cpu_cores_count)
1130                         continue;
1131
1132                 if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1133                         dev->gpu = gpu;
1134                         out_dev = dev;
1135
1136                         list_for_each_entry(mem, &dev->mem_props, list)
1137                                 mem->gpu = dev->gpu;
1138                         list_for_each_entry(cache, &dev->cache_props, list)
1139                                 cache->gpu = dev->gpu;
1140                         list_for_each_entry(iolink, &dev->io_link_props, list)
1141                                 iolink->gpu = dev->gpu;
1142                         break;
1143                 }
1144         }
1145         up_write(&topology_lock);
1146         return out_dev;
1147 }
1148
1149 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1150 {
1151         /*
1152          * TODO: Generate an event for thunk about the arrival/removal
1153          * of the GPU
1154          */
1155 }
1156
1157 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1158  *              patch this after CRAT parsing.
1159  */
1160 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1161 {
1162         struct kfd_mem_properties *mem;
1163         struct kfd_local_mem_info local_mem_info;
1164
1165         if (!dev)
1166                 return;
1167
1168         /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1169          * single bank of VRAM local memory.
1170          * for dGPUs - VCRAT reports only one bank of Local Memory
1171          * for APUs - If CRAT from ACPI reports more than one bank, then
1172          *      all the banks will report the same mem_clk_max information
1173          */
1174         amdgpu_amdkfd_get_local_mem_info(dev->gpu->kgd, &local_mem_info);
1175
1176         list_for_each_entry(mem, &dev->mem_props, list)
1177                 mem->mem_clk_max = local_mem_info.mem_clk_max;
1178 }
1179
1180 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1181 {
1182         struct kfd_iolink_properties *link, *cpu_link;
1183         struct kfd_topology_device *cpu_dev;
1184         uint32_t cap;
1185         uint32_t cpu_flag = CRAT_IOLINK_FLAGS_ENABLED;
1186         uint32_t flag = CRAT_IOLINK_FLAGS_ENABLED;
1187
1188         if (!dev || !dev->gpu)
1189                 return;
1190
1191         pcie_capability_read_dword(dev->gpu->pdev,
1192                         PCI_EXP_DEVCAP2, &cap);
1193
1194         if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
1195                      PCI_EXP_DEVCAP2_ATOMIC_COMP64)))
1196                 cpu_flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1197                         CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1198
1199         if (!dev->gpu->pci_atomic_requested ||
1200             dev->gpu->device_info->asic_family == CHIP_HAWAII)
1201                 flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1202                         CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1203
1204         /* GPU only creates direct links so apply flags setting to all */
1205         list_for_each_entry(link, &dev->io_link_props, list) {
1206                 link->flags = flag;
1207                 cpu_dev = kfd_topology_device_by_proximity_domain(
1208                                 link->node_to);
1209                 if (cpu_dev) {
1210                         list_for_each_entry(cpu_link,
1211                                             &cpu_dev->io_link_props, list)
1212                                 if (cpu_link->node_to == link->node_from)
1213                                         cpu_link->flags = cpu_flag;
1214                 }
1215         }
1216 }
1217
1218 int kfd_topology_add_device(struct kfd_dev *gpu)
1219 {
1220         uint32_t gpu_id;
1221         struct kfd_topology_device *dev;
1222         struct kfd_cu_info cu_info;
1223         int res = 0;
1224         struct list_head temp_topology_device_list;
1225         void *crat_image = NULL;
1226         size_t image_size = 0;
1227         int proximity_domain;
1228         struct amdgpu_ras *ctx;
1229
1230         INIT_LIST_HEAD(&temp_topology_device_list);
1231
1232         gpu_id = kfd_generate_gpu_id(gpu);
1233
1234         pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1235
1236         proximity_domain = atomic_inc_return(&topology_crat_proximity_domain);
1237
1238         /* Check to see if this gpu device exists in the topology_device_list.
1239          * If so, assign the gpu to that device,
1240          * else create a Virtual CRAT for this gpu device and then parse that
1241          * CRAT to create a new topology device. Once created assign the gpu to
1242          * that topology device
1243          */
1244         dev = kfd_assign_gpu(gpu);
1245         if (!dev) {
1246                 res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1247                                                     COMPUTE_UNIT_GPU, gpu,
1248                                                     proximity_domain);
1249                 if (res) {
1250                         pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1251                                gpu_id);
1252                         return res;
1253                 }
1254                 res = kfd_parse_crat_table(crat_image,
1255                                            &temp_topology_device_list,
1256                                            proximity_domain);
1257                 if (res) {
1258                         pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1259                                gpu_id);
1260                         goto err;
1261                 }
1262
1263                 down_write(&topology_lock);
1264                 kfd_topology_update_device_list(&temp_topology_device_list,
1265                         &topology_device_list);
1266
1267                 /* Update the SYSFS tree, since we added another topology
1268                  * device
1269                  */
1270                 res = kfd_topology_update_sysfs();
1271                 up_write(&topology_lock);
1272
1273                 if (!res)
1274                         sys_props.generation_count++;
1275                 else
1276                         pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1277                                                 gpu_id, res);
1278                 dev = kfd_assign_gpu(gpu);
1279                 if (WARN_ON(!dev)) {
1280                         res = -ENODEV;
1281                         goto err;
1282                 }
1283         }
1284
1285         dev->gpu_id = gpu_id;
1286         gpu->id = gpu_id;
1287
1288         /* TODO: Move the following lines to function
1289          *      kfd_add_non_crat_information
1290          */
1291
1292         /* Fill-in additional information that is not available in CRAT but
1293          * needed for the topology
1294          */
1295
1296         amdgpu_amdkfd_get_cu_info(dev->gpu->kgd, &cu_info);
1297
1298         strncpy(dev->node_props.name, gpu->device_info->asic_name,
1299                         KFD_TOPOLOGY_PUBLIC_NAME_SIZE);
1300
1301         dev->node_props.simd_arrays_per_engine =
1302                 cu_info.num_shader_arrays_per_engine;
1303
1304         dev->node_props.vendor_id = gpu->pdev->vendor;
1305         dev->node_props.device_id = gpu->pdev->device;
1306         dev->node_props.location_id = pci_dev_id(gpu->pdev);
1307         dev->node_props.max_engine_clk_fcompute =
1308                 amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->kgd);
1309         dev->node_props.max_engine_clk_ccompute =
1310                 cpufreq_quick_get_max(0) / 1000;
1311         dev->node_props.drm_render_minor =
1312                 gpu->shared_resources.drm_render_minor;
1313
1314         dev->node_props.hive_id = gpu->hive_id;
1315         dev->node_props.num_sdma_engines = gpu->device_info->num_sdma_engines;
1316         dev->node_props.num_sdma_xgmi_engines =
1317                                 gpu->device_info->num_xgmi_sdma_engines;
1318         dev->node_props.num_sdma_queues_per_engine =
1319                                 gpu->device_info->num_sdma_queues_per_engine;
1320         dev->node_props.num_gws = (hws_gws_support &&
1321                 dev->gpu->dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) ?
1322                 amdgpu_amdkfd_get_num_gws(dev->gpu->kgd) : 0;
1323         dev->node_props.num_cp_queues = get_cp_queues_num(dev->gpu->dqm);
1324         dev->node_props.unique_id = gpu->unique_id;
1325
1326         kfd_fill_mem_clk_max_info(dev);
1327         kfd_fill_iolink_non_crat_info(dev);
1328
1329         switch (dev->gpu->device_info->asic_family) {
1330         case CHIP_KAVERI:
1331         case CHIP_HAWAII:
1332         case CHIP_TONGA:
1333                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
1334                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1335                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1336                 break;
1337         case CHIP_CARRIZO:
1338         case CHIP_FIJI:
1339         case CHIP_POLARIS10:
1340         case CHIP_POLARIS11:
1341         case CHIP_POLARIS12:
1342         case CHIP_VEGAM:
1343                 pr_debug("Adding doorbell packet type capability\n");
1344                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
1345                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1346                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1347                 break;
1348         case CHIP_VEGA10:
1349         case CHIP_VEGA12:
1350         case CHIP_VEGA20:
1351         case CHIP_RAVEN:
1352         case CHIP_RENOIR:
1353         case CHIP_ARCTURUS:
1354         case CHIP_NAVI10:
1355         case CHIP_NAVI12:
1356         case CHIP_NAVI14:
1357                 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1358                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1359                         HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1360                 break;
1361         default:
1362                 WARN(1, "Unexpected ASIC family %u",
1363                      dev->gpu->device_info->asic_family);
1364         }
1365
1366         /*
1367         * Overwrite ATS capability according to needs_iommu_device to fix
1368         * potential missing corresponding bit in CRAT of BIOS.
1369         */
1370         if (dev->gpu->device_info->needs_iommu_device)
1371                 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
1372         else
1373                 dev->node_props.capability &= ~HSA_CAP_ATS_PRESENT;
1374
1375         /* Fix errors in CZ CRAT.
1376          * simd_count: Carrizo CRAT reports wrong simd_count, probably
1377          *              because it doesn't consider masked out CUs
1378          * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
1379          */
1380         if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) {
1381                 dev->node_props.simd_count =
1382                         cu_info.simd_per_cu * cu_info.cu_active_number;
1383                 dev->node_props.max_waves_per_simd = 10;
1384         }
1385
1386         ctx = amdgpu_ras_get_context((struct amdgpu_device *)(dev->gpu->kgd));
1387         if (ctx) {
1388                 /* kfd only concerns sram ecc on GFX/SDMA and HBM ecc on UMC */
1389                 dev->node_props.capability |=
1390                         (((ctx->features & BIT(AMDGPU_RAS_BLOCK__SDMA)) != 0) ||
1391                          ((ctx->features & BIT(AMDGPU_RAS_BLOCK__GFX)) != 0)) ?
1392                         HSA_CAP_SRAM_EDCSUPPORTED : 0;
1393                 dev->node_props.capability |= ((ctx->features & BIT(AMDGPU_RAS_BLOCK__UMC)) != 0) ?
1394                         HSA_CAP_MEM_EDCSUPPORTED : 0;
1395
1396                 dev->node_props.capability |= (ctx->features != 0) ?
1397                         HSA_CAP_RASEVENTNOTIFY : 0;
1398         }
1399
1400         kfd_debug_print_topology();
1401
1402         if (!res)
1403                 kfd_notify_gpu_change(gpu_id, 1);
1404 err:
1405         kfd_destroy_crat_image(crat_image);
1406         return res;
1407 }
1408
1409 int kfd_topology_remove_device(struct kfd_dev *gpu)
1410 {
1411         struct kfd_topology_device *dev, *tmp;
1412         uint32_t gpu_id;
1413         int res = -ENODEV;
1414
1415         down_write(&topology_lock);
1416
1417         list_for_each_entry_safe(dev, tmp, &topology_device_list, list)
1418                 if (dev->gpu == gpu) {
1419                         gpu_id = dev->gpu_id;
1420                         kfd_remove_sysfs_node_entry(dev);
1421                         kfd_release_topology_device(dev);
1422                         sys_props.num_devices--;
1423                         res = 0;
1424                         if (kfd_topology_update_sysfs() < 0)
1425                                 kfd_topology_release_sysfs();
1426                         break;
1427                 }
1428
1429         up_write(&topology_lock);
1430
1431         if (!res)
1432                 kfd_notify_gpu_change(gpu_id, 0);
1433
1434         return res;
1435 }
1436
1437 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
1438  *      topology. If GPU device is found @idx, then valid kfd_dev pointer is
1439  *      returned through @kdev
1440  * Return -     0: On success (@kdev will be NULL for non GPU nodes)
1441  *              -1: If end of list
1442  */
1443 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
1444 {
1445
1446         struct kfd_topology_device *top_dev;
1447         uint8_t device_idx = 0;
1448
1449         *kdev = NULL;
1450         down_read(&topology_lock);
1451
1452         list_for_each_entry(top_dev, &topology_device_list, list) {
1453                 if (device_idx == idx) {
1454                         *kdev = top_dev->gpu;
1455                         up_read(&topology_lock);
1456                         return 0;
1457                 }
1458
1459                 device_idx++;
1460         }
1461
1462         up_read(&topology_lock);
1463
1464         return -1;
1465
1466 }
1467
1468 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
1469 {
1470         int first_cpu_of_numa_node;
1471
1472         if (!cpumask || cpumask == cpu_none_mask)
1473                 return -1;
1474         first_cpu_of_numa_node = cpumask_first(cpumask);
1475         if (first_cpu_of_numa_node >= nr_cpu_ids)
1476                 return -1;
1477 #ifdef CONFIG_X86_64
1478         return cpu_data(first_cpu_of_numa_node).apicid;
1479 #else
1480         return first_cpu_of_numa_node;
1481 #endif
1482 }
1483
1484 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
1485  *      of the given NUMA node (numa_node_id)
1486  * Return -1 on failure
1487  */
1488 int kfd_numa_node_to_apic_id(int numa_node_id)
1489 {
1490         if (numa_node_id == -1) {
1491                 pr_warn("Invalid NUMA Node. Use online CPU mask\n");
1492                 return kfd_cpumask_to_apic_id(cpu_online_mask);
1493         }
1494         return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
1495 }
1496
1497 #if defined(CONFIG_DEBUG_FS)
1498
1499 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
1500 {
1501         struct kfd_topology_device *dev;
1502         unsigned int i = 0;
1503         int r = 0;
1504
1505         down_read(&topology_lock);
1506
1507         list_for_each_entry(dev, &topology_device_list, list) {
1508                 if (!dev->gpu) {
1509                         i++;
1510                         continue;
1511                 }
1512
1513                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1514                 r = dqm_debugfs_hqds(m, dev->gpu->dqm);
1515                 if (r)
1516                         break;
1517         }
1518
1519         up_read(&topology_lock);
1520
1521         return r;
1522 }
1523
1524 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
1525 {
1526         struct kfd_topology_device *dev;
1527         unsigned int i = 0;
1528         int r = 0;
1529
1530         down_read(&topology_lock);
1531
1532         list_for_each_entry(dev, &topology_device_list, list) {
1533                 if (!dev->gpu) {
1534                         i++;
1535                         continue;
1536                 }
1537
1538                 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1539                 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packets);
1540                 if (r)
1541                         break;
1542         }
1543
1544         up_read(&topology_lock);
1545
1546         return r;
1547 }
1548
1549 #endif