drivers/gpu/drm/amd/amdkfd/kfd

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

DEFINITIONS
